Add YGLayoutGetMargin

Summary:
Fix #326. I'll open another PR once this one gets accepted to add support for `YGLayoutGetBorder` 👌
Closes https://github.com/facebook/yoga/pull/335

Reviewed By: gkassabli

Differential Revision: D4409399

Pulled By: emilsjolander

fbshipit-source-id: 8153f6701cab60b55a485f6d2e0b9f7767481090

.gitignore

@@ -5,6 +5,58 @@
 /.buckconfig.local
 /.buckd
 /gentest/test.html
+.buckversion
+
+# Jekyll
+/.sass-cache/
+/_site/
 
 # Visual studio code
 .vscode
+*.pdb
+*.tlog
+*.obj
+*.pch
+*.log
+*.orig
+
+# Xcode
+## Build generated
+build/
+DerivedData/
+
+## Various settings
+*.pbxuser
+!default.pbxuser
+*.mode1v3
+!default.mode1v3
+*.mode2v3
+!default.mode2v3
+*.perspectivev3
+!default.perspectivev3
+xcuserdata/
+
+## Other
+*.moved-aside
+*.xcuserstate
+
+## Obj-C/Swift specific
+*.hmap
+*.ipa
+*.dSYM.zip
+*.dSYM
+
+# CocoaPods
+#
+# We recommend against adding the Pods directory to your .gitignore. However
+# you should judge for yourself, the pros and cons are mentioned at:
+# https://guides.cocoapods.org/using/using-cocoapods.html#should-i-check-the-pods-directory-into-source-control
+#
+Pods/
+
+# Carthage
+#
+# Add this line if you want to avoid checking in source code from Carthage dependencies.
+# Carthage/Checkouts
+
+Carthage/Build

.hgignore

@@ -1,10 +0,0 @@
-.DS_STORE
-
-/buck-cache/
-/buck-out/
-/.buckconfig.local
-/.buckd
-/gentest/test.html
-
-# Visual studio code
-.vscode

.travis.yml

@@ -17,14 +17,26 @@ before_install:
   - brew cask install java
   - brew outdated xctool || brew upgrade xctool
   - brew install mono
+
   - export JAVA_HOME=$(/usr/libexec/java_home -v 1.8)
   - export PATH=$JAVA_HOME/bin:$PATH
 
+install:
+  - cd javascript
+  - npm install
+  - cd $TRAVIS_BUILD_DIR
+
 script:
-  - buck test //:CSSLayout
+  - buck test //:yoga
   - buck test //java:java
-  - buck test //CSSLayoutKit:CSSLayoutKit --config cxx.default_platform=iphonesimulator-x86_64 --config cxx.cflags=-DTRAVIS_CI
-  - sh csharp/tests/Facebook.CSSLayout/test_macos.sh
+  - buck test //YogaKit:YogaKitTests --config cxx.default_platform=iphonesimulator-x86_64 --config cxx.cflags=-DTRAVIS_CI
+  - sh csharp/tests/Facebook.Yoga/test_macos.sh
+
+  - cd javascript
+  - npm run test:all
+  - npm run bench
+  - cd $TRAVIS_BUILD_DIR
+
   - buck run //benchmark:benchmark
   - git checkout HEAD^
   - buck run //benchmark:benchmark

BUCK

@@ -5,43 +5,37 @@
 # LICENSE file in the root directory of this source tree. An additional grant
 # of patent rights can be found in the PATENTS file in the same directory.
 
-include_defs('//CSSLAYOUT_DEFS')
-
-BASE_COMPILER_FLAGS = [
-  '-fno-omit-frame-pointer',
-  '-fexceptions',
-  '-Wall',
-  '-Werror',
-  '-O3',
-]
+include_defs('//YOGA_DEFS')
 
 GMOCK_OVERRIDE_FLAGS = [
   # gmock does not mark mocked methods as override, ignore the warnings in tests
   '-Wno-inconsistent-missing-override',
 ]
 
-COMPILER_FLAGS = BASE_COMPILER_FLAGS + ['-std=c11']
+COMPILER_FLAGS = BASE_COMPILER_FLAGS + ['-std=c11', '-fPIC']
 TEST_COMPILER_FLAGS = BASE_COMPILER_FLAGS + GMOCK_OVERRIDE_FLAGS + ['-std=c++11']
 
 cxx_library(
-  name = 'CSSLayout',
-  srcs = glob(['CSSLayout/*.c']),
-  tests=[':tests'],
-  exported_headers = subdir_glob([('', 'CSSLayout/*.h')]),
+  name = 'yoga',
+  soname = 'libyogacore.$(ext)',
+  srcs = glob(['yoga/*.c']),
+  tests=[':YogaTests'],
+  exported_headers = subdir_glob([('', 'yoga/*.h')]),
   header_namespace = '',
-  force_static = True,
   compiler_flags = COMPILER_FLAGS,
-  deps = [],
+  deps = [] if THIS_IS_FBOBJC else [
+    yoga_dep('lib/fb:ndklog'),
+  ],
   visibility = ['PUBLIC'],
 )
 
 cxx_test(
-  name = 'tests',
+  name = 'YogaTests',
   contacts = ['emilsj@fb.com'],
   srcs = glob(['tests/*.cpp']),
   compiler_flags = TEST_COMPILER_FLAGS,
   deps = [
-    ':CSSLayout',
+    ':yoga',
     GTEST_TARGET,
   ],
   visibility = ['PUBLIC'],

CONTRIBUTING

@@ -1,10 +1,7 @@
-# Contributing to css-layout
+# Contributing to yoga
 We want to make contributing to this project as easy and transparent as
 possible.
 
-## Our Development Process
-All the development is happening on GitHub first and we have internal tools to sync down to Facebook codebase.
-
 ## Pull Requests
 We actively welcome your pull requests.
 1. Fork the repo and create your branch from `master`.
@@ -32,5 +29,5 @@ outlined on that page and do not file a public issue.
 * format.sh
 
 ## License
-By contributing to css-layout, you agree that your contributions will be licensed
+By contributing to yoga, you agree that your contributions will be licensed
 under its BSD license.

CSSLayout/CSSEnums.h

@@ -1,108 +0,0 @@
-/**
- * Copyright (c) 2014-present, Facebook, Inc.
- * All rights reserved.
- *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
- */
-
-typedef enum CSSOverflow {
-  CSSOverflowVisible,
-  CSSOverflowHidden,
-  CSSOverflowScroll,
-  CSSOverflowCount,
-} CSSOverflow;
-
-typedef enum CSSJustify {
-  CSSJustifyFlexStart,
-  CSSJustifyCenter,
-  CSSJustifyFlexEnd,
-  CSSJustifySpaceBetween,
-  CSSJustifySpaceAround,
-  CSSJustifyCount,
-} CSSJustify;
-
-typedef enum CSSFlexDirection {
-  CSSFlexDirectionColumn,
-  CSSFlexDirectionColumnReverse,
-  CSSFlexDirectionRow,
-  CSSFlexDirectionRowReverse,
-  CSSFlexDirectionCount,
-} CSSFlexDirection;
-
-typedef enum CSSAlign {
-  CSSAlignAuto,
-  CSSAlignFlexStart,
-  CSSAlignCenter,
-  CSSAlignFlexEnd,
-  CSSAlignStretch,
-  CSSAlignCount,
-} CSSAlign;
-
-typedef enum CSSEdge {
-  CSSEdgeLeft,
-  CSSEdgeTop,
-  CSSEdgeRight,
-  CSSEdgeBottom,
-  CSSEdgeStart,
-  CSSEdgeEnd,
-  CSSEdgeHorizontal,
-  CSSEdgeVertical,
-  CSSEdgeAll,
-  CSSEdgeCount,
-} CSSEdge;
-
-typedef enum CSSWrap {
-  CSSWrapNoWrap,
-  CSSWrapWrap,
-  CSSWrapCount,
-} CSSWrap;
-
-typedef enum CSSDirection {
-  CSSDirectionInherit,
-  CSSDirectionLTR,
-  CSSDirectionRTL,
-  CSSDirectionCount,
-} CSSDirection;
-
-typedef enum CSSExperimentalFeature {
-  CSSExperimentalFeatureRounding,
-  CSSExperimentalFeatureWebFlexBasis,
-  CSSExperimentalFeatureCount,
-} CSSExperimentalFeature;
-
-typedef enum CSSLogLevel {
-  CSSLogLevelError,
-  CSSLogLevelWarn,
-  CSSLogLevelInfo,
-  CSSLogLevelDebug,
-  CSSLogLevelVerbose,
-  CSSLogLevelCount,
-} CSSLogLevel;
-
-typedef enum CSSDimension {
-  CSSDimensionWidth,
-  CSSDimensionHeight,
-  CSSDimensionCount,
-} CSSDimension;
-
-typedef enum CSSMeasureMode {
-  CSSMeasureModeUndefined,
-  CSSMeasureModeExactly,
-  CSSMeasureModeAtMost,
-  CSSMeasureModeCount,
-} CSSMeasureMode;
-
-typedef enum CSSPositionType {
-  CSSPositionTypeRelative,
-  CSSPositionTypeAbsolute,
-  CSSPositionTypeCount,
-} CSSPositionType;
-
-typedef enum CSSPrintOptions {
-  CSSPrintOptionsLayout = 1,
-  CSSPrintOptionsStyle = 2,
-  CSSPrintOptionsChildren = 4,
-  CSSPrintOptionsCount,
-} CSSPrintOptions;

CSSLayout/CSSLayout.h

@@ -1,184 +0,0 @@
-/**
- * Copyright (c) 2014-present, Facebook, Inc.
- * All rights reserved.
- *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
- */
-
-#pragma once
-
-#include <assert.h>
-#include <math.h>
-#include <stdarg.h>
-#include <stdint.h>
-#include <stdio.h>
-#include <stdlib.h>
-
-#ifndef __cplusplus
-#include <stdbool.h>
-#endif
-
-// Not defined in MSVC++
-#ifndef NAN
-static const unsigned long __nan[2] = {0xffffffff, 0x7fffffff};
-#define NAN (*(const float *) __nan)
-#endif
-
-#define CSSUndefined NAN
-
-#include "CSSEnums.h"
-#include "CSSMacros.h"
-
-CSS_EXTERN_C_BEGIN
-
-typedef struct CSSSize {
-  float width;
-  float height;
-} CSSSize;
-
-typedef struct CSSNode *CSSNodeRef;
-typedef CSSSize (*CSSMeasureFunc)(CSSNodeRef node,
-                                  float width,
-                                  CSSMeasureMode widthMode,
-                                  float height,
-                                  CSSMeasureMode heightMode);
-typedef void (*CSSPrintFunc)(CSSNodeRef node);
-typedef int (*CSSLogger)(CSSLogLevel level, const char *format, va_list args);
-
-typedef void *(*CSSMalloc)(size_t size);
-typedef void *(*CSSCalloc)(size_t count, size_t size);
-typedef void *(*CSSRealloc)(void *ptr, size_t size);
-typedef void (*CSSFree)(void *ptr);
-
-// CSSNode
-WIN_EXPORT CSSNodeRef CSSNodeNew(void);
-WIN_EXPORT void CSSNodeInit(const CSSNodeRef node);
-WIN_EXPORT void CSSNodeFree(const CSSNodeRef node);
-WIN_EXPORT void CSSNodeFreeRecursive(const CSSNodeRef node);
-WIN_EXPORT void CSSNodeReset(const CSSNodeRef node);
-WIN_EXPORT int32_t CSSNodeGetInstanceCount(void);
-
-WIN_EXPORT void CSSNodeInsertChild(const CSSNodeRef node,
-                                   const CSSNodeRef child,
-                                   const uint32_t index);
-WIN_EXPORT void CSSNodeRemoveChild(const CSSNodeRef node, const CSSNodeRef child);
-WIN_EXPORT CSSNodeRef CSSNodeGetChild(const CSSNodeRef node, const uint32_t index);
-WIN_EXPORT uint32_t CSSNodeChildCount(const CSSNodeRef node);
-
-WIN_EXPORT void CSSNodeCalculateLayout(const CSSNodeRef node,
-                                       const float availableWidth,
-                                       const float availableHeight,
-                                       const CSSDirection parentDirection);
-
-// Mark a node as dirty. Only valid for nodes with a custom measure function
-// set.
-// CSSLayout knows when to mark all other nodes as dirty but because nodes with
-// measure functions
-// depends on information not known to CSSLayout they must perform this dirty
-// marking manually.
-WIN_EXPORT void CSSNodeMarkDirty(const CSSNodeRef node);
-WIN_EXPORT bool CSSNodeIsDirty(const CSSNodeRef node);
-
-WIN_EXPORT void CSSNodePrint(const CSSNodeRef node, const CSSPrintOptions options);
-
-WIN_EXPORT bool CSSValueIsUndefined(const float value);
-
-WIN_EXPORT bool CSSNodeCanUseCachedMeasurement(const CSSMeasureMode widthMode,
-                                               const float width,
-                                               const CSSMeasureMode heightMode,
-                                               const float height,
-                                               const CSSMeasureMode lastWidthMode,
-                                               const float lastWidth,
-                                               const CSSMeasureMode lastHeightMode,
-                                               const float lastHeight,
-                                               const float lastComputedWidth,
-                                               const float lastComputedHeight,
-                                               const float marginRow,
-                                               const float marginColumn);
-
-WIN_EXPORT void CSSNodeCopyStyle(const CSSNodeRef dstNode, const CSSNodeRef srcNode);
-
-#define CSS_NODE_PROPERTY(type, name, paramName)                           \
-  WIN_EXPORT void CSSNodeSet##name(const CSSNodeRef node, type paramName); \
-  WIN_EXPORT type CSSNodeGet##name(const CSSNodeRef node);
-
-#define CSS_NODE_STYLE_PROPERTY(type, name, paramName)                                \
-  WIN_EXPORT void CSSNodeStyleSet##name(const CSSNodeRef node, const type paramName); \
-  WIN_EXPORT type CSSNodeStyleGet##name(const CSSNodeRef node);
-
-#define CSS_NODE_STYLE_EDGE_PROPERTY(type, name, paramName)    \
-  WIN_EXPORT void CSSNodeStyleSet##name(const CSSNodeRef node, \
-                                        const CSSEdge edge,    \
-                                        const type paramName); \
-  WIN_EXPORT type CSSNodeStyleGet##name(const CSSNodeRef node, const CSSEdge edge);
-
-#define CSS_NODE_LAYOUT_PROPERTY(type, name) \
-  WIN_EXPORT type CSSNodeLayoutGet##name(const CSSNodeRef node);
-
-CSS_NODE_PROPERTY(void *, Context, context);
-CSS_NODE_PROPERTY(CSSMeasureFunc, MeasureFunc, measureFunc);
-CSS_NODE_PROPERTY(CSSPrintFunc, PrintFunc, printFunc);
-CSS_NODE_PROPERTY(bool, HasNewLayout, hasNewLayout);
-
-CSS_NODE_STYLE_PROPERTY(CSSDirection, Direction, direction);
-CSS_NODE_STYLE_PROPERTY(CSSFlexDirection, FlexDirection, flexDirection);
-CSS_NODE_STYLE_PROPERTY(CSSJustify, JustifyContent, justifyContent);
-CSS_NODE_STYLE_PROPERTY(CSSAlign, AlignContent, alignContent);
-CSS_NODE_STYLE_PROPERTY(CSSAlign, AlignItems, alignItems);
-CSS_NODE_STYLE_PROPERTY(CSSAlign, AlignSelf, alignSelf);
-CSS_NODE_STYLE_PROPERTY(CSSPositionType, PositionType, positionType);
-CSS_NODE_STYLE_PROPERTY(CSSWrap, FlexWrap, flexWrap);
-CSS_NODE_STYLE_PROPERTY(CSSOverflow, Overflow, overflow);
-
-WIN_EXPORT void CSSNodeStyleSetFlex(const CSSNodeRef node, const float flex);
-CSS_NODE_STYLE_PROPERTY(float, FlexGrow, flexGrow);
-CSS_NODE_STYLE_PROPERTY(float, FlexShrink, flexShrink);
-CSS_NODE_STYLE_PROPERTY(float, FlexBasis, flexBasis);
-
-CSS_NODE_STYLE_EDGE_PROPERTY(float, Position, position);
-CSS_NODE_STYLE_EDGE_PROPERTY(float, Margin, margin);
-CSS_NODE_STYLE_EDGE_PROPERTY(float, Padding, padding);
-CSS_NODE_STYLE_EDGE_PROPERTY(float, Border, border);
-
-CSS_NODE_STYLE_PROPERTY(float, Width, width);
-CSS_NODE_STYLE_PROPERTY(float, Height, height);
-CSS_NODE_STYLE_PROPERTY(float, MinWidth, minWidth);
-CSS_NODE_STYLE_PROPERTY(float, MinHeight, minHeight);
-CSS_NODE_STYLE_PROPERTY(float, MaxWidth, maxWidth);
-CSS_NODE_STYLE_PROPERTY(float, MaxHeight, maxHeight);
-
-// Yoga specific properties, not compatible with flexbox specification
-// Aspect ratio control the size of the undefined dimension of a node.
-// - On a node with a set width/height aspect ratio control the size of the unset dimension
-// - On a node with a set flex basis aspect ratio controls the size of the node in the cross axis if
-// unset
-// - On a node with a measure function aspect ratio works as though the measure function measures
-// the flex basis
-// - On a node with flex grow/shrink aspect ratio controls the size of the node in the cross axis if
-// unset
-// - Aspect ratio takes min/max dimensions into account
-CSS_NODE_STYLE_PROPERTY(float, AspectRatio, aspectRatio);
-
-CSS_NODE_LAYOUT_PROPERTY(float, Left);
-CSS_NODE_LAYOUT_PROPERTY(float, Top);
-CSS_NODE_LAYOUT_PROPERTY(float, Right);
-CSS_NODE_LAYOUT_PROPERTY(float, Bottom);
-CSS_NODE_LAYOUT_PROPERTY(float, Width);
-CSS_NODE_LAYOUT_PROPERTY(float, Height);
-CSS_NODE_LAYOUT_PROPERTY(CSSDirection, Direction);
-
-WIN_EXPORT void CSSLayoutSetLogger(CSSLogger logger);
-WIN_EXPORT void CSSLog(CSSLogLevel level, const char *message, ...);
-
-WIN_EXPORT void CSSLayoutSetExperimentalFeatureEnabled(CSSExperimentalFeature feature,
-                                                       bool enabled);
-WIN_EXPORT bool CSSLayoutIsExperimentalFeatureEnabled(CSSExperimentalFeature feature);
-
-WIN_EXPORT void CSSLayoutSetMemoryFuncs(CSSMalloc cssMalloc,
-                                        CSSCalloc cssCalloc,
-                                        CSSRealloc cssRealloc,
-                                        CSSFree cssFree);
-
-CSS_EXTERN_C_END

CSSLayout/CSSMacros.h

@@ -1,42 +0,0 @@
-/**
- * Copyright (c) 2014-present, Facebook, Inc.
- * All rights reserved.
- *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
- */
-
-#pragma once
-
-#ifdef __cplusplus
-#define CSS_EXTERN_C_BEGIN extern "C" {
-#define CSS_EXTERN_C_END }
-#else
-#define CSS_EXTERN_C_BEGIN
-#define CSS_EXTERN_C_END
-#endif
-
-#ifdef _WINDLL
-#define WIN_EXPORT __declspec(dllexport)
-#else
-#define WIN_EXPORT
-#endif
-
-#ifndef FB_ASSERTIONS_ENABLED
-#define FB_ASSERTIONS_ENABLED 1
-#endif
-
-#if FB_ASSERTIONS_ENABLED
-#define CSS_ABORT() abort()
-#else
-#define CSS_ABORT()
-#endif
-
-#ifndef CSS_ASSERT
-#define CSS_ASSERT(X, message)               \
-  if (!(X)) {                                \
-    CSSLog(CSSLogLevelError, "%s", message); \
-    CSS_ABORT();                             \
-  }
-#endif

CSSLayout/CSSNodeList.c

@@ -1,104 +0,0 @@
-/**
- * Copyright (c) 2014-present, Facebook, Inc.
- * All rights reserved.
- *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
- */
-
-#include "CSSNodeList.h"
-
-extern CSSMalloc gCSSMalloc;
-extern CSSRealloc gCSSRealloc;
-extern CSSFree gCSSFree;
-
-struct CSSNodeList {
-  uint32_t capacity;
-  uint32_t count;
-  CSSNodeRef *items;
-};
-
-CSSNodeListRef CSSNodeListNew(const uint32_t initialCapacity) {
-  const CSSNodeListRef list = gCSSMalloc(sizeof(struct CSSNodeList));
-  CSS_ASSERT(list != NULL, "Could not allocate memory for list");
-
-  list->capacity = initialCapacity;
-  list->count = 0;
-  list->items = gCSSMalloc(sizeof(CSSNodeRef) * list->capacity);
-  CSS_ASSERT(list->items != NULL, "Could not allocate memory for items");
-
-  return list;
-}
-
-void CSSNodeListFree(const CSSNodeListRef list) {
-  if (list) {
-    gCSSFree(list->items);
-    gCSSFree(list);
-  }
-}
-
-uint32_t CSSNodeListCount(const CSSNodeListRef list) {
-  if (list) {
-    return list->count;
-  }
-  return 0;
-}
-
-void CSSNodeListAdd(CSSNodeListRef *listp, const CSSNodeRef node) {
-  if (!*listp) {
-    *listp = CSSNodeListNew(4);
-  }
-  CSSNodeListInsert(listp, node, (*listp)->count);
-}
-
-void CSSNodeListInsert(CSSNodeListRef *listp, const CSSNodeRef node, const uint32_t index) {
-  if (!*listp) {
-    *listp = CSSNodeListNew(4);
-  }
-  CSSNodeListRef list = *listp;
-
-  if (list->count == list->capacity) {
-    list->capacity *= 2;
-    list->items = gCSSRealloc(list->items, sizeof(CSSNodeRef) * list->capacity);
-    CSS_ASSERT(list->items != NULL, "Could not extend allocation for items");
-  }
-
-  for (uint32_t i = list->count; i > index; i--) {
-    list->items[i] = list->items[i - 1];
-  }
-
-  list->count++;
-  list->items[index] = node;
-}
-
-CSSNodeRef CSSNodeListRemove(const CSSNodeListRef list, const uint32_t index) {
-  const CSSNodeRef removed = list->items[index];
-  list->items[index] = NULL;
-
-  for (uint32_t i = index; i < list->count - 1; i++) {
-    list->items[i] = list->items[i + 1];
-    list->items[i + 1] = NULL;
-  }
-
-  list->count--;
-  return removed;
-}
-
-CSSNodeRef CSSNodeListDelete(const CSSNodeListRef list, const CSSNodeRef node) {
-  for (uint32_t i = 0; i < list->count; i++) {
-    if (list->items[i] == node) {
-      return CSSNodeListRemove(list, i);
-    }
-  }
-
-  return NULL;
-}
-
-CSSNodeRef CSSNodeListGet(const CSSNodeListRef list, const uint32_t index) {
-  if (CSSNodeListCount(list) > 0) {
-    return list->items[index];
-  }
-
-  return NULL;
-}

CSSLayout/CSSNodeList.h

@@ -1,33 +0,0 @@
-/**
- * Copyright (c) 2014-present, Facebook, Inc.
- * All rights reserved.
- *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
- */
-
-#pragma once
-
-#include <assert.h>
-#include <stdint.h>
-#include <stdio.h>
-#include <stdlib.h>
-
-#include "CSSLayout.h"
-#include "CSSMacros.h"
-
-CSS_EXTERN_C_BEGIN
-
-typedef struct CSSNodeList *CSSNodeListRef;
-
-CSSNodeListRef CSSNodeListNew(const uint32_t initialCapacity);
-void CSSNodeListFree(const CSSNodeListRef list);
-uint32_t CSSNodeListCount(const CSSNodeListRef list);
-void CSSNodeListAdd(CSSNodeListRef *listp, const CSSNodeRef node);
-void CSSNodeListInsert(CSSNodeListRef *listp, const CSSNodeRef node, const uint32_t index);
-CSSNodeRef CSSNodeListRemove(const CSSNodeListRef list, const uint32_t index);
-CSSNodeRef CSSNodeListDelete(const CSSNodeListRef list, const CSSNodeRef node);
-CSSNodeRef CSSNodeListGet(const CSSNodeListRef list, const uint32_t index);
-
-CSS_EXTERN_C_END

CSSLayoutKit/Tests/CSSLayoutKitTests.m

@@ -1,271 +0,0 @@
-/**
- * Copyright (c) 2014-present, Facebook, Inc.
- * All rights reserved.
- *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
- */
-
-#import <XCTest/XCTest.h>
-
-#import "UIView+CSSLayout.h"
-
-@interface CSSLayoutKitTests : XCTestCase
-@end
-
-@implementation CSSLayoutKitTests
-
-#ifndef TRAVIS_CI
-
-- (void)testNodesAreDeallocedWithSingleView
-{
-  XCTAssertEqual(0, CSSNodeGetInstanceCount());
-
-  UIView *view = [[UIView alloc] initWithFrame:CGRectZero];
-  [view css_setFlexBasis:1];
-  XCTAssertEqual(1, CSSNodeGetInstanceCount());
-  view = nil;
-
-  XCTAssertEqual(0, CSSNodeGetInstanceCount());
-}
-
-- (void)testNodesAreDeallocedCascade
-{
-  XCTAssertEqual(0, CSSNodeGetInstanceCount());
-
-  UIView *view = [[UIView alloc] initWithFrame:CGRectZero];
-  [view css_setFlexBasis:1];
-
-  for (int i=0; i<10; i++) {
-    UIView *subview = [[UIView alloc] initWithFrame:CGRectZero];
-    [subview css_setFlexBasis:1];
-    [view addSubview:subview];
-  }
-  XCTAssertEqual(11, CSSNodeGetInstanceCount());
-  view = nil;
-
-  XCTAssertEqual(0, CSSNodeGetInstanceCount());
-}
-
-#endif
-
-- (void)testUsesFlexbox
-{
-  UIView *view = [[UIView alloc] initWithFrame:CGRectZero];
-  XCTAssertFalse([view css_usesFlexbox]);
-
-  [view css_setUsesFlexbox:YES];
-  XCTAssertTrue([view css_usesFlexbox]);
-
-  [view css_setUsesFlexbox:NO];
-  XCTAssertFalse([view css_usesFlexbox]);
-}
-
-- (void)testSizeThatFitsAsserts
-{
-  UIView *view = [[UIView alloc] initWithFrame:CGRectZero];
-  dispatch_sync(dispatch_queue_create("com.facebook.CSSLayout.testing", DISPATCH_QUEUE_SERIAL), ^(void){
-    XCTAssertThrows([view css_intrinsicSize]);
-  });
-}
-
-- (void)testSizeThatFitsSmoke
-{
-  UIView *container = [[UIView alloc] initWithFrame:CGRectZero];
-  [container css_setUsesFlexbox:YES];
-  [container css_setFlexDirection:CSSFlexDirectionRow];
-  [container css_setAlignItems:CSSAlignFlexStart];
-
-  UILabel *longTextLabel = [[UILabel alloc] initWithFrame:CGRectZero];
-  longTextLabel.text = @"This is a very very very very very very very very long piece of text.";
-  longTextLabel.lineBreakMode = NSLineBreakByTruncatingTail;
-  longTextLabel.numberOfLines = 1;
-  [longTextLabel css_setUsesFlexbox:YES];
-  [longTextLabel css_setFlexShrink:1];
-  [container addSubview:longTextLabel];
-
-  UIView *textBadgeView = [[UIView alloc] initWithFrame:CGRectZero];
-  [textBadgeView css_setUsesFlexbox:YES];
-  [textBadgeView css_setMargin:3.0 forEdge:CSSEdgeLeft];
-  [textBadgeView css_setWidth:10];
-  [textBadgeView css_setHeight:10];
-  [container addSubview:textBadgeView];
-
-  const CGSize containerSize = [container css_intrinsicSize];
-  XCTAssertTrue(CGSizeEqualToSize(CGSizeMake(514,21), containerSize), @"Size is actually %@", NSStringFromCGSize(containerSize));
-}
-
-- (void)testFrameAndOriginPlacement
-{
-  const CGSize containerSize = CGSizeMake(320, 50);
-
-  UIView *container = [[UIView alloc] initWithFrame:CGRectMake(0, 0, containerSize.width, containerSize.height)];
-  [container css_setUsesFlexbox:YES];
-  [container css_setFlexDirection:CSSFlexDirectionRow];
-
-  for (int i = 0; i < 3; i++) {
-    UIView *subview = [[UIView alloc] initWithFrame:CGRectZero];
-    [subview css_setUsesFlexbox:YES];
-    [subview css_setFlexGrow:1];
-
-    [container addSubview:subview];
-  }
-  [container css_applyLayout];
-
-  XCTAssertFalse(CGRectIntersectsRect([container.subviews objectAtIndex:0].frame, [container.subviews objectAtIndex:1].frame));
-  XCTAssertFalse(CGRectIntersectsRect([container.subviews objectAtIndex:1].frame, [container.subviews objectAtIndex:2].frame));
-  XCTAssertFalse(CGRectIntersectsRect([container.subviews objectAtIndex:0].frame, [container.subviews objectAtIndex:2].frame));
-
-  CGFloat totalWidth = 0;
-  for (UIView *view in container.subviews) {
-    totalWidth += view.bounds.size.width;
-  }
-
-  XCTAssertEqual(containerSize.width, totalWidth, @"The container's width is %.6f, the subviews take up %.6f", containerSize.width, totalWidth);
-}
-
-- (void)testThatLayoutIsCorrectWhenWeSwapViewOrder
-{
-  const CGSize containerSize = CGSizeMake(300, 50);
-
-  UIView *container = [[UIView alloc] initWithFrame:CGRectMake(0, 0, containerSize.width, containerSize.height)];
-  [container css_setUsesFlexbox:YES];
-  [container css_setFlexDirection:CSSFlexDirectionRow];
-
-  UIView *subview1 = [[UIView alloc] initWithFrame:CGRectZero];
-  [subview1 css_setUsesFlexbox:YES];
-  [subview1 css_setFlexGrow:1];
-  [container addSubview:subview1];
-
-  UIView *subview2 = [[UIView alloc] initWithFrame:CGRectZero];
-  [subview2 css_setUsesFlexbox:YES];
-  [subview2 css_setFlexGrow:1];
-  [container addSubview:subview2];
-
-  UIView *subview3 = [[UIView alloc] initWithFrame:CGRectZero];
-  [subview3 css_setUsesFlexbox:YES];
-  [subview3 css_setFlexGrow:1];
-  [container addSubview:subview3];
-
-  [container css_applyLayout];
-
-  XCTAssertTrue(CGRectEqualToRect(subview1.frame, CGRectMake(0, 0, 100, 50)));
-  XCTAssertTrue(CGRectEqualToRect(subview2.frame, CGRectMake(100, 0, 100, 50)), @"It's actually %@", NSStringFromCGRect(subview2.frame));
-  XCTAssertTrue(CGRectEqualToRect(subview3.frame, CGRectMake(200, 0, 100, 50)));
-
-  [container exchangeSubviewAtIndex:2 withSubviewAtIndex:0];
-  [subview2 css_setIncludeInLayout:NO];
-  [container css_applyLayout];
-
-  XCTAssertTrue(CGRectEqualToRect(subview3.frame, CGRectMake(0, 0, 150, 50)));
-  XCTAssertTrue(CGRectEqualToRect(subview1.frame, CGRectMake(150, 0, 150, 50)));
-
-  // this frame shouldn't have been modified since last time.
-  XCTAssertTrue(CGRectEqualToRect(subview2.frame, CGRectMake(100, 0, 100, 50)));
-}
-
-- (void)testThatWeRespectIncludeInLayoutFlag
-{
-  const CGSize containerSize = CGSizeMake(300, 50);
-
-  UIView *container = [[UIView alloc] initWithFrame:CGRectMake(0, 0, containerSize.width, containerSize.height)];
-  [container css_setUsesFlexbox:YES];
-  [container css_setFlexDirection:CSSFlexDirectionRow];
-
-  UIView *subview1 = [[UIView alloc] initWithFrame:CGRectZero];
-  [subview1 css_setUsesFlexbox:YES];
-  [subview1 css_setFlexGrow:1];
-  [container addSubview:subview1];
-
-  UIView *subview2 = [[UIView alloc] initWithFrame:CGRectZero];
-  [subview2 css_setUsesFlexbox:YES];
-  [subview2 css_setFlexGrow:1];
-  [container addSubview:subview2];
-
-  UIView *subview3 = [[UIView alloc] initWithFrame:CGRectZero];
-  [subview3 css_setUsesFlexbox:YES];
-  [subview3 css_setFlexGrow:1];
-  [container addSubview:subview3];
-
-  [container css_applyLayout];
-
-  for (UIView *view in container.subviews) {
-    XCTAssertTrue(CGSizeEqualToSize(CGSizeMake(100, 50), subview1.bounds.size), @"Actual size is %@", NSStringFromCGSize(view.bounds.size));
-  }
-
-  [subview3 css_setIncludeInLayout:NO];
-  [container css_applyLayout];
-
-  XCTAssertTrue(CGSizeEqualToSize(CGSizeMake(150, 50), subview1.bounds.size), @"Actual size is %@", NSStringFromCGSize(subview1.bounds.size));
-  XCTAssertTrue(CGSizeEqualToSize(CGSizeMake(150, 50), subview2.bounds.size), @"Actual size is %@", NSStringFromCGSize(subview2.bounds.size));
-
-  // We don't set the frame to zero, so, it should be set to what it was previously at.
-  XCTAssertTrue(CGSizeEqualToSize(CGSizeMake(100, 50), subview3.bounds.size), @"Actual size is %@", NSStringFromCGSize(subview3.bounds.size));
-}
-
-- (void)testThatNumberOfChildrenIsCorrectWhenWeIgnoreSubviews
-{
-  UIView *container = [[UIView alloc] initWithFrame:CGRectZero];
-  [container css_setUsesFlexbox:YES];
-  [container css_setFlexDirection:CSSFlexDirectionRow];
-
-  UIView *subview1 = [[UIView alloc] initWithFrame:CGRectZero];
-  [subview1 css_setUsesFlexbox:YES];
-  [subview1 css_setIncludeInLayout:NO];
-  [container addSubview:subview1];
-
-  UIView *subview2 = [[UIView alloc] initWithFrame:CGRectZero];
-  [subview2 css_setUsesFlexbox:YES];
-  [subview2 css_setIncludeInLayout:NO];
-  [container addSubview:subview2];
-
-  UIView *subview3 = [[UIView alloc] initWithFrame:CGRectZero];
-  [subview3 css_setUsesFlexbox:YES];
-  [subview3 css_setIncludeInLayout:YES];
-  [container addSubview:subview3];
-
-  [container css_applyLayout];
-  XCTAssertEqual(1, [container css_numberOfChildren]);
-
-  [subview2 css_setIncludeInLayout:YES];
-  [container css_applyLayout];
-  XCTAssertEqual(2, [container css_numberOfChildren]);
-}
-
-- (void)testThatViewNotIncludedInFirstLayoutPassAreIncludedInSecond
-{
-  UIView *container = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 300, 50)];
-  [container css_setUsesFlexbox:YES];
-  [container css_setFlexDirection:CSSFlexDirectionRow];
-
-  UIView *subview1 = [[UIView alloc] initWithFrame:CGRectZero];
-  [subview1 css_setUsesFlexbox:YES];
-  [subview1 css_setFlexGrow:1];
-  [container addSubview:subview1];
-
-  UIView *subview2 = [[UIView alloc] initWithFrame:CGRectZero];
-  [subview2 css_setUsesFlexbox:YES];
-  [subview2 css_setFlexGrow:1];
-  [container addSubview:subview2];
-
-  UIView *subview3 = [[UIView alloc] initWithFrame:CGRectZero];
-  [subview3 css_setUsesFlexbox:YES];
-  [subview3 css_setFlexGrow:1];
-  [subview3 css_setIncludeInLayout:NO];
-  [container addSubview:subview3];
-
-  [container css_applyLayout];
-
-  XCTAssertTrue(CGSizeEqualToSize(CGSizeMake(150, 50), subview1.bounds.size), @"Actual size is %@", NSStringFromCGSize(subview1.bounds.size));
-  XCTAssertTrue(CGSizeEqualToSize(CGSizeMake(150, 50), subview2.bounds.size), @"Actual size is %@", NSStringFromCGSize(subview2.bounds.size));
-  XCTAssertTrue(CGSizeEqualToSize(CGSizeZero, subview3.bounds.size), @"Actual size %@", NSStringFromCGSize(subview3.bounds.size));
-
-  [subview3 css_setIncludeInLayout:YES];
-  [container css_applyLayout];
-  for (UIView *view in container.subviews) {
-    XCTAssertTrue(CGSizeEqualToSize(CGSizeMake(100, 50), subview1.bounds.size), @"Actual size is %@", NSStringFromCGSize(view.bounds.size));
-  }
-}
-
-@end

CSSLayoutKit/UIView+CSSLayout.h

@@ -1,72 +0,0 @@
-/**
- * Copyright (c) 2014-present, Facebook, Inc.
- * All rights reserved.
- *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
- */
-
-#import <UIKit/UIKit.h>
-#import <CSSLayout/CSSLayout.h>
-
-@interface UIView (CSSLayout)
-
-/**
-  The property that decides if we should include this view when calculating layout. Defaults to YES.
- */
-@property (nonatomic, readwrite, assign, setter=css_setIncludeInLayout:) BOOL css_includeInLayout;
-
-/**
- The property that decides during layout/sizing whether or not css_* properties should be applied. Defaults to NO.
- */
-@property (nonatomic, readwrite, assign, setter=css_setUsesFlexbox:) BOOL css_usesFlexbox;
-
-- (void)css_setDirection:(CSSDirection)direction;
-- (void)css_setFlexDirection:(CSSFlexDirection)flexDirection;
-- (void)css_setJustifyContent:(CSSJustify)justifyContent;
-- (void)css_setAlignContent:(CSSAlign)alignContent;
-- (void)css_setAlignItems:(CSSAlign)alignItems;
-- (void)css_setAlignSelf:(CSSAlign)alignSelf;
-- (void)css_setPositionType:(CSSPositionType)positionType;
-- (void)css_setFlexWrap:(CSSWrap)flexWrap;
-
-- (void)css_setFlexGrow:(CGFloat)flexGrow;
-- (void)css_setFlexShrink:(CGFloat)flexShrink;
-- (void)css_setFlexBasis:(CGFloat)flexBasis;
-
-- (void)css_setPosition:(CGFloat)position forEdge:(CSSEdge)edge;
-- (void)css_setMargin:(CGFloat)margin forEdge:(CSSEdge)edge;
-- (void)css_setPadding:(CGFloat)padding forEdge:(CSSEdge)edge;
-
-- (void)css_setWidth:(CGFloat)width;
-- (void)css_setHeight:(CGFloat)height;
-- (void)css_setMinWidth:(CGFloat)minWidth;
-- (void)css_setMinHeight:(CGFloat)minHeight;
-- (void)css_setMaxWidth:(CGFloat)maxWidth;
-- (void)css_setMaxHeight:(CGFloat)maxHeight;
-
-// Yoga specific properties, not compatible with flexbox specification
-- (void)css_setAspectRatio:(CGFloat)aspectRatio;
-
-/**
- Get the resolved direction of this node. This won't be CSSDirectionInherit
- */
-- (CSSDirection)css_resolvedDirection;
-
-/**
- Perform a layout calculation and update the frames of the views in the hierarchy with th results
- */
-- (void)css_applyLayout;
-
-/**
- Returns the size of the view if no constraints were given. This could equivalent to calling [self sizeThatFits:CGSizeMake(CGFLOAT_MAX, CGFLOAT_MAX)];
- */
-- (CGSize)css_intrinsicSize;
-
-/**
- Returns the number of children that are using Flexbox.
- */
-- (NSUInteger)css_numberOfChildren;
-
-@end

CSSLayoutKit/UIView+CSSLayout.m

@@ -1,379 +0,0 @@
-/**
- * Copyright (c) 2014-present, Facebook, Inc.
- * All rights reserved.
- *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
- */
-
-#import "UIView+CSSLayout.h"
-
-#import <objc/runtime.h>
-
-@interface CSSNodeBridge : NSObject
-@property (nonatomic, assign, readonly) CSSNodeRef cnode;
-@end
-
-@implementation CSSNodeBridge
-
-+ (void)initialize
-{
-  CSSLayoutSetExperimentalFeatureEnabled(CSSExperimentalFeatureWebFlexBasis, true);
-}
-
-- (instancetype)init
-{
-  if ([super init]) {
-    _cnode = CSSNodeNew();
-  }
-
-  return self;
-}
-
-- (void)dealloc
-{
-  CSSNodeFree(_cnode);
-}
-@end
-
-@implementation UIView (CSSLayout)
-
-- (BOOL)css_usesFlexbox
-{
-  NSNumber *usesFlexbox = objc_getAssociatedObject(self, @selector(css_usesFlexbox));
-  return [usesFlexbox boolValue];
-}
-
-- (BOOL)css_includeInLayout
-{
-  NSNumber *includeInLayout = objc_getAssociatedObject(self, @selector(css_includeInLayout));
-  return (includeInLayout != nil) ? [includeInLayout boolValue] : YES;
-}
-
-- (NSUInteger)css_numberOfChildren
-{
-  return CSSNodeChildCount([self cssNode]);
-}
-
-#pragma mark - Setters
-
-- (void)css_setIncludeInLayout:(BOOL)includeInLayout
-{
-  objc_setAssociatedObject(
-    self,
-    @selector(css_includeInLayout),
-    @(includeInLayout),
-    OBJC_ASSOCIATION_RETAIN_NONATOMIC);
-}
-
-- (void)css_setUsesFlexbox:(BOOL)enabled
-{
-  objc_setAssociatedObject(
-    self,
-    @selector(css_usesFlexbox),
-    @(enabled),
-    OBJC_ASSOCIATION_RETAIN_NONATOMIC);
-}
-
-- (void)css_setDirection:(CSSDirection)direction
-{
-  CSSNodeStyleSetDirection([self cssNode], direction);
-}
-
-- (void)css_setFlexDirection:(CSSFlexDirection)flexDirection
-{
-  CSSNodeStyleSetFlexDirection([self cssNode], flexDirection);
-}
-
-- (void)css_setJustifyContent:(CSSJustify)justifyContent
-{
-  CSSNodeStyleSetJustifyContent([self cssNode], justifyContent);
-}
-
-- (void)css_setAlignContent:(CSSAlign)alignContent
-{
-  CSSNodeStyleSetAlignContent([self cssNode], alignContent);
-}
-
-- (void)css_setAlignItems:(CSSAlign)alignItems
-{
-  CSSNodeStyleSetAlignItems([self cssNode], alignItems);
-}
-
-- (void)css_setAlignSelf:(CSSAlign)alignSelf
-{
-  CSSNodeStyleSetAlignSelf([self cssNode], alignSelf);
-}
-
-- (void)css_setPositionType:(CSSPositionType)positionType
-{
-  CSSNodeStyleSetPositionType([self cssNode], positionType);
-}
-
-- (void)css_setFlexWrap:(CSSWrap)flexWrap
-{
-  CSSNodeStyleSetFlexWrap([self cssNode], flexWrap);
-}
-
-- (void)css_setFlexGrow:(CGFloat)flexGrow
-{
-  CSSNodeStyleSetFlexGrow([self cssNode], flexGrow);
-}
-
-- (void)css_setFlexShrink:(CGFloat)flexShrink
-{
-  CSSNodeStyleSetFlexShrink([self cssNode], flexShrink);
-}
-
-- (void)css_setFlexBasis:(CGFloat)flexBasis
-{
-  CSSNodeStyleSetFlexBasis([self cssNode], flexBasis);
-}
-
-- (void)css_setPosition:(CGFloat)position forEdge:(CSSEdge)edge
-{
-  CSSNodeStyleSetPosition([self cssNode], edge, position);
-}
-
-- (void)css_setMargin:(CGFloat)margin forEdge:(CSSEdge)edge
-{
-  CSSNodeStyleSetMargin([self cssNode], edge, margin);
-}
-
-- (void)css_setPadding:(CGFloat)padding forEdge:(CSSEdge)edge
-{
-  CSSNodeStyleSetPadding([self cssNode], edge, padding);
-}
-
-- (void)css_setWidth:(CGFloat)width
-{
-  CSSNodeStyleSetWidth([self cssNode], width);
-}
-
-- (void)css_setHeight:(CGFloat)height
-{
-  CSSNodeStyleSetHeight([self cssNode], height);
-}
-
-- (void)css_setMinWidth:(CGFloat)minWidth
-{
-  CSSNodeStyleSetMinWidth([self cssNode], minWidth);
-}
-
-- (void)css_setMinHeight:(CGFloat)minHeight
-{
-  CSSNodeStyleSetMinHeight([self cssNode], minHeight);
-}
-
-- (void)css_setMaxWidth:(CGFloat)maxWidth
-{
-  CSSNodeStyleSetMaxWidth([self cssNode], maxWidth);
-}
-
-- (void)css_setMaxHeight:(CGFloat)maxHeight
-{
-  CSSNodeStyleSetMaxHeight([self cssNode], maxHeight);
-}
-
-- (void)css_setAspectRatio:(CGFloat)aspectRatio
-{
-  CSSNodeStyleSetAspectRatio([self cssNode], aspectRatio);
-}
-
-#pragma mark - Layout and Sizing
-
-- (CSSDirection)css_resolvedDirection
-{
-  return CSSNodeLayoutGetDirection([self cssNode]);
-}
-
-- (void)css_applyLayout
-{
-  [self calculateLayoutWithSize:self.bounds.size];
-  CSSApplyLayoutToViewHierarchy(self);
-}
-
-- (CGSize)css_intrinsicSize
-{
-  const CGSize constrainedSize = {
-      .width = CSSUndefined,
-      .height = CSSUndefined,
-  };
-  return [self calculateLayoutWithSize:constrainedSize];
-}
-
-#pragma mark - Private
-
-- (CSSNodeRef)cssNode
-{
-  CSSNodeBridge *node = objc_getAssociatedObject(self, @selector(cssNode));
-  if (!node) {
-    node = [CSSNodeBridge new];
-    CSSNodeSetContext(node.cnode, (__bridge void *) self);
-    objc_setAssociatedObject(self, @selector(cssNode), node, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
-  }
-
-  return node.cnode;
-}
-
-- (CGSize)calculateLayoutWithSize:(CGSize)size
-{
-  NSAssert([NSThread isMainThread], @"CSS Layout calculation must be done on main.");
-  NSAssert([self css_usesFlexbox], @"CSS Layout is not enabled for this view.");
-
-  CSSAttachNodesFromViewHierachy(self);
-
-  const CSSNodeRef node = [self cssNode];
-  CSSNodeCalculateLayout(
-    node,
-    size.width,
-    size.height,
-    CSSNodeStyleGetDirection(node));
-
-  return (CGSize) {
-    .width = CSSNodeLayoutGetWidth(node),
-    .height = CSSNodeLayoutGetHeight(node),
-  };
-}
-
-static CSSSize CSSMeasureView(
-  CSSNodeRef node,
-  float width,
-  CSSMeasureMode widthMode,
-  float height,
-  CSSMeasureMode heightMode)
-{
-  const CGFloat constrainedWidth = (widthMode == CSSMeasureModeUndefined) ? CGFLOAT_MAX : width;
-  const CGFloat constrainedHeight = (heightMode == CSSMeasureModeUndefined) ? CGFLOAT_MAX: height;
-
-  UIView *view = (__bridge UIView*) CSSNodeGetContext(node);
-  const CGSize sizeThatFits = [view sizeThatFits:(CGSize) {
-    .width = constrainedWidth,
-    .height = constrainedHeight,
-  }];
-
-  return (CSSSize) {
-    .width = CSSSanitizeMeasurement(constrainedWidth, sizeThatFits.width, widthMode),
-    .height = CSSSanitizeMeasurement(constrainedHeight, sizeThatFits.height, heightMode),
-  };
-}
-
-static CGFloat CSSSanitizeMeasurement(
-  CGFloat constrainedSize,
-  CGFloat measuredSize,
-  CSSMeasureMode measureMode)
-{
-  CGFloat result;
-  if (measureMode == CSSMeasureModeExactly) {
-    result = constrainedSize;
-  } else if (measureMode == CSSMeasureModeAtMost) {
-    result = MIN(constrainedSize, measuredSize);
-  } else {
-    result = measuredSize;
-  }
-
-  return result;
-}
-
-static void CSSAttachNodesFromViewHierachy(UIView *view) {
-  CSSNodeRef node = [view cssNode];
-
-  // Only leaf nodes should have a measure function
-  if (![view css_usesFlexbox] || view.subviews.count == 0) {
-    CSSNodeSetMeasureFunc(node, CSSMeasureView);
-    CSSRemoveAllChildren(node);
-  } else {
-    CSSNodeSetMeasureFunc(node, NULL);
-
-    // Create a list of all the subviews that we are going to use for layout.
-    NSMutableArray<UIView *> *subviewsToInclude = [[NSMutableArray alloc] initWithCapacity:view.subviews.count];
-    for (UIView *subview in view.subviews) {
-      if ([subview css_includeInLayout]) {
-        [subviewsToInclude addObject:subview];
-      }
-    }
-
-    BOOL shouldReconstructChildList = NO;
-    if (CSSNodeChildCount(node) != subviewsToInclude.count) {
-      shouldReconstructChildList = YES;
-    } else {
-      for (int i = 0; i < subviewsToInclude.count; i++) {
-        if (CSSNodeGetChild(node, i) != [subviewsToInclude[i] cssNode]) {
-          shouldReconstructChildList = YES;
-          break;
-        }
-      }
-    }
-
-    if (shouldReconstructChildList) {
-      CSSRemoveAllChildren(node);
-
-      for (int i = 0 ; i < subviewsToInclude.count; i++) {
-        UIView *const subview = subviewsToInclude[i];
-        CSSNodeInsertChild(node, [subview cssNode], i);
-        CSSAttachNodesFromViewHierachy(subview);
-      }
-    }
-  }
-}
-
-static void CSSRemoveAllChildren(const CSSNodeRef node)
-{
-  if (node == NULL) {
-      return;
-  }
-
-  while (CSSNodeChildCount(node) > 0) {
-    CSSNodeRemoveChild(node, CSSNodeGetChild(node, CSSNodeChildCount(node) - 1));
-  }
-}
-
-static CGFloat CSSRoundPixelValue(CGFloat value)
-{
-  static CGFloat scale;
-  static dispatch_once_t onceToken;
-  dispatch_once(&onceToken, ^(){
-    scale = [UIScreen mainScreen].scale;
-  });
-
-  return round(value * scale) / scale;
-}
-
-static void CSSApplyLayoutToViewHierarchy(UIView *view) {
-  NSCAssert([NSThread isMainThread], @"Framesetting should only be done on the main thread.");
-  if (![view css_includeInLayout]) {
-     return;
-  }
-
-  CSSNodeRef node = [view cssNode];
-  const CGPoint topLeft = {
-    CSSNodeLayoutGetLeft(node),
-    CSSNodeLayoutGetTop(node),
-  };
-
-  const CGPoint bottomRight = {
-    topLeft.x + CSSNodeLayoutGetWidth(node),
-    topLeft.y + CSSNodeLayoutGetHeight(node),
-  };
-
-  view.frame = (CGRect) {
-    .origin = {
-      .x = CSSRoundPixelValue(topLeft.x),
-      .y = CSSRoundPixelValue(topLeft.y),
-    },
-    .size = {
-      .width = CSSRoundPixelValue(bottomRight.x) - CSSRoundPixelValue(topLeft.x),
-      .height = CSSRoundPixelValue(bottomRight.y) - CSSRoundPixelValue(topLeft.y),
-    },
-  };
-
-  const BOOL isLeaf = ![view css_usesFlexbox] || view.subviews.count == 0;
-  if (!isLeaf) {
-    for (NSUInteger i = 0; i < view.subviews.count; i++) {
-      CSSApplyLayoutToViewHierarchy(view.subviews[i]);
-    }
-  }
-}
-
-@end

LICENSE

@@ -1,6 +1,6 @@
 BSD License
 
-For css-layout software
+For yoga software
 
 Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
 

LICENSE-examples

@@ -0,0 +1,9 @@
+The examples provided by Facebook are for non-commercial testing and evaluation
+purposes only. Facebook reserves all rights not expressly granted.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+FACEBOOK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

PATENTS

@@ -1,6 +1,6 @@
 Additional Grant of Patent Rights Version 2
 
-"Software" means the CSS Layout software distributed by Facebook, Inc.
+"Software" means the yoga software distributed by Facebook, Inc.
 
 Facebook, Inc. (“Facebook”) hereby grants to each recipient of the Software
 (“you”) a perpetual, worldwide, royalty-free, non-exclusive, irrevocable

README.md

@@ -1,159 +1,30 @@
-# CSSLayout [![Build Status](https://travis-ci.org/facebook/css-layout.svg?branch=master)](https://travis-ci.org/facebook/css-layout)
+# Yoga [![Build Status](https://travis-ci.org/facebook/yoga.svg?branch=master)](https://travis-ci.org/facebook/yoga)
 
-## Goals
-CSSLayout is a cross-platform implementation of flexbox. The goal of CSSLayout is allow native developers to have the same expressive layout system as developers developing for the modern web are used to. CSSLayout allows developers for web, android, iOS, and windows to use the same layout primitives across platforms. This saves time, increases collaboration between platform teams, and makes it easier for developers to work on multiple platforms.
+## Building
+Yoga builds with [buck](https://buckbuild.com). Make sure you install buck before contributing to Yoga. Yoga's main implementation is in C, with bindings to supported languages and frameworks. When making changes to Yoga please ensure the changes are also propagated to these bindings when applicable.
 
-The goal of CSSLayout is not to re-implement all of css. CSSLayout only targets flexbox, and does not have any plans on implementing support for tables, floats, or any other css concepts. CSSLayout also does not plan on supporting styling properties which do not affect layout such as color or background properties.
+## Testing
+For testing we rely on [gtest](https://github.com/google/googletest) as a submodule. After cloning Yoga run `git submodule init` followed by `git submodule update`.
 
+For any changes you make you should ensure that all the tests are passing. In case you make any fixes or additions to the library please also add tests for that change to ensure we don't break anything in the future. Tests are located in the `tests` directory. Run the tests by executing `buck test //:yoga`.
 
-## Differences from web
-CSSLayout tries to stay as close as possible to the web implementation of flexbox. There are however certain cases where CSSLayout differs from the web implementation.
-
-### Default values
-CSSLayout has chosen to make changes to the default values of certain properties. These default values were chosen based on our usage of the library. When testing layout with tools such as JSFiddle you can apply the following css style to ensure the defaults match those of CSSLayout. Or fork the [following JSFiddle](http://jsfiddle.net/vjeux/y11txxv9/).
-
-```css
-div, span {
-  box-sizing: border-box;
-  position: relative;
-
-  display: flex;
-  flex-direction: column;
-  align-items: stretch;
-  flex-shrink: 0;
-  align-content: flex-start;
-
-  border: 0 solid black;
-  margin: 0;
-  padding: 0;
-  min-width: 0;
-}
-```
-
-- `box-sizing: border-box` is the most convenient way to express the relation between `width` and `borderWidth`.
-- Everything is `display: flex` by default. All the behaviors of `block` and `inline-block` can be expressed in term of `flex` but not the opposite.
-- All the flex elements are oriented from top to bottom, left to right and do not shrink. This is how things are laid out using the default CSS settings and what you'd expect.
-- Everything is `position: relative`. This makes `position: absolute` target the direct parent and not some parent which is either `relative` or `absolute`. If you want to position an element relative to something else, you should move it in the DOM instead of relying of CSS. It also makes `top, left, right, bottom` do something when not specifying `position: absolute`.
-
-### Size units
-CSSLayout currently only supports pixel sizes. The reason being that we have not seen the need for any other units. We would like to support percentage units sometime in the future.
-
-### -start and -end properties
-We think supporting RTL locales is very important. Therefor CSSLayout supports non-standards -start and -end suffixed versions of margin, padding, border, and position.
-
-
-## Usage
-
-### C
-The full API can be found in `CSSLayout/CSSLayout.h`.
-
-```c
-CSSNodeRef root = CSSNodeNew();
-CSSNodeStyleSetWidth(root, 100);
-CSSNodeStyleSetHeight(root, 100);
-
-for (uint32_t i = 0; i < 10; i++) {
-  CSSNodeRef child = CSSNodeNew();
-  CSSNodeStyleSetHeight(child, 10);
-  CSSNodeInsertChild(root, child, 0);
-}
-
-CSSNodeCalculateLayout(root, CSSUndefined, CSSUndefined, CSSDirectionLTR);
-
-// Get for resulting layout
-CSSNodeLayoutGetLeft(root);
-CSSNodeLayoutGetTop(root);
-CSSNodeLayoutGetWidth(root);
-CSSNodeLayoutGetHeight(root);
-```
-
-### Java
-The full API can be found in `java/com/facebook/csslayout/CSSNode.java`.
-
-```java
-CSSNode root = new CSSNode();
-root.setStyleWidth(100);
-root.setStyleHeight(100);
-
-for (int i = 0; i < 10; i++) {
-  CSSNode child = new CSSNode();
-  child.setStyleHeight(10);
-  root.addChildAt(child, 0);
-}
-
-root.calculateLayout(new CSSLayoutContext());
-
-// Get for resulting layout
-root.getLayoutX();
-root.getLayoutY();
-root.getLayoutWidth();
-root.getLayoutHeight();
-```
-
-### UIKit
-The full API can be found in `CSSLayoutKit/UIView+CSSLayout.h`.
-
-```objective-c
-UIView *root = [UIView new];
-[root css_setUsesFlexbox:YES];
-[root css_setWidth:100];
-[root css_setHeight:100];
-
-for (NSUInteger i = 0; i < 10; i++) {
-  UIView *child = [UIView new];
-  [child css_setUsesFlexbox:YES];
-  [child css_setHeight:10];
-  [root addSubview:child];
-}
-
-// Resulting layout will be set on the UIView hierarchy frames.
-[root css_applyLayout];
-```
-
-### .NET
-The full API can be found in `csharp/Facebook.CSSLayout/CSSNode.cs`.
-
-```csharp
-var root = new CSSNode();
-root.StyleWidth = 100;
-root.StyleHeight = 100;
-
-for (var i = 0; i < 10; i++)
-{
-  var child = new CSSNode();
-  child.StyleHeight = 10;
-  root.Insert(0, child);
-}
-
-// Get for resulting layout
-root.LayoutX;
-root.LayoutY;
-root.LayoutWidth;
-root.LayoutHeight;
-```
-
-## Contributing
-To contribute to CSSLayout you need to first install [buck](https://buckbuild.com) which is the build system used by CSSLayout. CSSLayout is implemented in C with language bindings for Java, Objective-C, and .NET. When making changes to `CSSLayout/CSSLayout.h` please ensure to update `java/jni/CSSJNI.h`, `java/com/facebook/csslayout/CSSNode.java`, `uikit/CSSLayout/UIView+CSSLayout.m`, and `csharp/Facebook.CSSLayout/CSSNode.cs` to reflect the API change. Before submitting any code please run `format.sh` to ensure the code matches the project's code style.
-
-Before making any larger changes to CSSLayout please open an issue with a RFC so the changes can be discussed first. Generally we are very open to changes and improvements that will benefit the community.
-
-### Testing
-For any changes you make you should ensure that all the tests are passing. In case you make any fixes or additions to the library please also add at least one test to ensure we don't break anything in the future. Tests are located in `tests/CSSLayoutTest.cpp`. Run the tests by executing `buck test //:CSSLayout`.
-
-Instead of manually writing a test which ensures parity with web implementations of flexbox you can run `gentest/gentest.rb` to generated a test for you. You can write html which you want to verify in CSSLayout, in `gentest/fixtures` folder, such as the following.
+Instead of manually writing a test which ensures parity with web implementations of Flexbox you can run `gentest/gentest.rb` to generated a test for you. You can write html which you want to verify in Yoga, in `gentest/fixtures` folder, such as the following.
 
 ```html
-<div style="width: 100px; height: 100px; align-items: center;">
+<div id="my_test" style="width: 100px; height: 100px; align-items: center;">
   <div style="width: 50px; height: 50px;"></div>
 </div>
 ```
 
-Run `gentest/gentest.rb` to generate test code and re-run `buck test //:CSSLayout` to validate the behavior. One test case will be generated for every root `div` in the input html.
+Run `gentest/gentest.rb` to generate test code and re-run `buck test //:yoga` to validate the behavior. One test case will be generated for every root `div` in the input html.
 
 You may need to install the latest watir-webdriver gem (`gem install watir-webdriver`) and [ChromeDriver](https://sites.google.com/a/chromium.org/chromedriver/) to run `gentest/gentest.rb` Ruby script.
 
-#### .NET
-.NET testing is not integrated in buck yet, you might need to set up .NET testing environment. We have a script which to launch C# test on macOS, `csharp/tests/Facebook.CSSLayout/test_macos.sh`.
+### .NET
+.NET testing is not integrated in buck yet, you might need to set up .NET testing environment. We have a script which to launch C# test on macOS, `csharp/tests/Facebook.Yoga/test_macos.sh`.
 
-### Benchmarks
-Benchmarks are located in `benchmarks/CSSBenchmark.c` and can be run with `buck run //benchmarks:benchmarks`. If you think your change has affected performance please run this before and after your change to validate that nothing has regressed.
+## Code style
+For the main C implementation of Yoga clang-format is used to ensure a consistent code style. Please run `bash format.sh` before submitting a pull request. For other languages just try to follow the current code style.
+
+## Benchmarks
+Benchmarks are located in `benchmarks/YGBenchmark.c` and can be run with `buck run //benchmarks:benchmarks`. If you think your change has affected performance please run this before and after your change to validate that nothing has regressed. Benchmarks are run on every commit in CI.

YOGA_DEFS

@@ -1,5 +1,5 @@
 
-CSSLAYOUT_ROOT = '//...'
+YOGA_ROOT = '//...'
 INFER_ANNOTATIONS_TARGET = '//lib/infer-annotations:infer-annotations'
 JSR_305_TARGET = '//lib/jsr-305:jsr-305'
 JUNIT_TARGET = '//lib/junit:junit'
@@ -9,12 +9,23 @@ GTEST_TARGET = '//lib/gtest:gtest'
 JNI_TARGET = '//lib/jni:jni'
 FBJNI_TARGET = '//lib/fb:fbjni'
 
+THIS_IS_FBOBJC = False
+
 CXX_LIBRARY_WHITELIST = [
+  '//:yoga',
   '//lib/fb:fbjni',
   '//java:jni',
 ]
 
-def csslayout_dep(dep):
+BASE_COMPILER_FLAGS = [
+  '-fno-omit-frame-pointer',
+  '-fexceptions',
+  '-Wall',
+  '-Werror',
+  '-O3',
+]
+
+def yoga_dep(dep):
   return '//' + dep
 
 class allow_unsafe_import:

YogaKit/BUCK

@@ -5,9 +5,9 @@
 # LICENSE file in the root directory of this source tree. An additional grant
 # of patent rights can be found in the PATENTS file in the same directory.
 
-include_defs('//CSSLAYOUT_DEFS')
+include_defs('//YOGA_DEFS')
 
-UIKIT_CSSLAYOUT_COMPILER_FLAGS = [
+COMPILER_FLAGS = [
   '-fobjc-arc',
   '-Wconditional-uninitialized',
   '-Wdangling-else',
@@ -28,9 +28,8 @@ UIKIT_CSSLAYOUT_COMPILER_FLAGS = [
 ]
 
 apple_library(
-  name = 'CSSLayoutKit',
-  compiler_flags = UIKIT_CSSLAYOUT_COMPILER_FLAGS,
-  tests = [':CSSLayoutKitTests'],
+  name = 'YogaKit',
+  compiler_flags = COMPILER_FLAGS,
   srcs = glob(['*.m']),
   exported_headers = glob(['*.h']),
   frameworks = [
@@ -38,14 +37,14 @@ apple_library(
     '$SDKROOT/System/Library/Frameworks/UIKit.framework',
   ],
   deps = [
-    csslayout_dep(':CSSLayout'),
+    yoga_dep(':yoga'),
   ],
   visibility = ['PUBLIC'],
 )
 
 apple_test(
-  name = 'CSSLayoutKitTests',
-  compiler_flags = UIKIT_CSSLAYOUT_COMPILER_FLAGS,
+  name = 'YogaKitTests',
+  compiler_flags = COMPILER_FLAGS,
   info_plist = 'Tests/Info.plist',
   srcs = glob(['Tests/**/*.m']),
   frameworks = [
@@ -53,7 +52,7 @@ apple_test(
     '$PLATFORM_DIR/Developer/Library/Frameworks/XCTest.framework',
   ],
   deps = [
-    ':CSSLayoutKit',
+    ':YogaKit',
   ],
   visibility = ['PUBLIC'],
 )

YogaKit/Tests/YogaKitTests.m

@@ -0,0 +1,387 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+#import <XCTest/XCTest.h>
+
+#import <YogaKit/UIView+Yoga.h>
+
+@interface YogaKitTests : XCTestCase
+@end
+
+@implementation YogaKitTests
+
+#ifndef TRAVIS_CI
+
+- (void)testNodesAreDeallocedWithSingleView
+{
+  XCTAssertEqual(0, YGNodeGetInstanceCount());
+
+  UIView *view = [[UIView alloc] initWithFrame:CGRectZero];
+  view.yoga.flexBasis = 1;
+  XCTAssertEqual(1, YGNodeGetInstanceCount());
+  view = nil;
+
+  XCTAssertEqual(0, YGNodeGetInstanceCount());
+}
+
+- (void)testNodesAreDeallocedCascade
+{
+  XCTAssertEqual(0, YGNodeGetInstanceCount());
+
+  UIView *view = [[UIView alloc] initWithFrame:CGRectZero];
+  view.yoga.flexBasis = 1;
+
+  for (int i=0; i<10; i++) {
+    UIView *subview = [[UIView alloc] initWithFrame:CGRectZero];
+    subview.yoga.flexBasis = 1;
+    [view addSubview:subview];
+  }
+  XCTAssertEqual(11, YGNodeGetInstanceCount());
+  view = nil;
+
+  XCTAssertEqual(0, YGNodeGetInstanceCount());
+}
+
+#endif
+
+- (void)testUsesYoga
+{
+  UIView *view = [[UIView alloc] initWithFrame:CGRectZero];
+  XCTAssertFalse(view.yoga.isEnabled);
+
+  view.yoga.isEnabled = YES;
+  XCTAssertTrue(view.yoga.isEnabled);
+
+  view.yoga.isEnabled = NO;
+  XCTAssertFalse(view.yoga.isEnabled);
+}
+
+- (void)testSizeThatFitsAsserts
+{
+  UIView *view = [[UIView alloc] initWithFrame:CGRectZero];
+  dispatch_sync(dispatch_queue_create("com.facebook.Yoga.testing", DISPATCH_QUEUE_SERIAL), ^(void){
+    XCTAssertThrows(view.yoga.intrinsicSize);
+  });
+}
+
+- (void)testSizeThatFitsSmoke
+{
+  UIView *container = [[UIView alloc] initWithFrame:CGRectZero];
+  container.yoga.isEnabled = YES;
+  container.yoga.flexDirection = YGFlexDirectionRow;
+  container.yoga.alignItems = YGAlignFlexStart;
+
+  UILabel *longTextLabel = [[UILabel alloc] initWithFrame:CGRectZero];
+  longTextLabel.text = @"This is a very very very very very very very very long piece of text.";
+  longTextLabel.lineBreakMode = NSLineBreakByTruncatingTail;
+  longTextLabel.numberOfLines = 1;
+  longTextLabel.yoga.isEnabled = YES;
+  longTextLabel.yoga.flexShrink = 1;
+  [container addSubview:longTextLabel];
+
+  UIView *textBadgeView = [[UIView alloc] initWithFrame:CGRectZero];
+  textBadgeView.yoga.isEnabled = YES;
+  textBadgeView.yoga.marginLeft = 3.0;
+  textBadgeView.yoga.width = 10;
+  textBadgeView.yoga.height = 10;
+  [container addSubview:textBadgeView];
+
+  const CGSize containerSize = container.yoga.intrinsicSize;
+  XCTAssertTrue(CGSizeEqualToSize(CGSizeMake(514,21), containerSize), @"Size is actually %@", NSStringFromCGSize(containerSize));
+}
+
+- (void)testThatMarkingLeafsAsDirtyWillTriggerASizeRecalculation
+{
+  UIView *container = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 500, 50)];
+  container.yoga.isEnabled = YES;
+  container.yoga.flexDirection = YGFlexDirectionRow;
+  container.yoga.alignItems = YGAlignFlexStart;
+
+  UILabel *label = [[UILabel alloc] initWithFrame:CGRectZero];
+  label.text = @"This is a short text.";
+  label.numberOfLines = 1;
+  label.yoga.isEnabled = YES;
+  [container addSubview:label];
+
+  [container.yoga applyLayout];
+  XCTAssertTrue(CGSizeEqualToSize(CGSizeMake(146,21), label.bounds.size), @"Size is actually %@", NSStringFromCGSize(label.bounds.size));
+
+  label.text = @"This is a slightly longer text.";
+  [label.yoga markDirty];
+
+  [container.yoga applyLayout];
+  XCTAssertTrue(CGSizeEqualToSize(CGSizeMake(213,21), label.bounds.size), @"Size is actually %@", NSStringFromCGSize(label.bounds.size));
+}
+
+- (void)testFrameAndOriginPlacement
+{
+  const CGSize containerSize = CGSizeMake(320, 50);
+
+  UIView *container = [[UIView alloc] initWithFrame:CGRectMake(0, 0, containerSize.width, containerSize.height)];
+  container.yoga.isEnabled = YES;
+  container.yoga.flexDirection = YGFlexDirectionRow;
+
+  for (int i = 0; i < 3; i++) {
+    UIView *subview = [[UIView alloc] initWithFrame:CGRectZero];
+    subview.yoga.isEnabled = YES;
+    subview.yoga.flexGrow = 1;
+
+    [container addSubview:subview];
+  }
+  [container.yoga applyLayout];
+
+  XCTAssertFalse(CGRectIntersectsRect([container.subviews objectAtIndex:0].frame, [container.subviews objectAtIndex:1].frame));
+  XCTAssertFalse(CGRectIntersectsRect([container.subviews objectAtIndex:1].frame, [container.subviews objectAtIndex:2].frame));
+  XCTAssertFalse(CGRectIntersectsRect([container.subviews objectAtIndex:0].frame, [container.subviews objectAtIndex:2].frame));
+
+  CGFloat totalWidth = 0;
+  for (UIView *view in container.subviews) {
+    totalWidth += view.bounds.size.width;
+  }
+
+  XCTAssertEqual(containerSize.width, totalWidth, @"The container's width is %.6f, the subviews take up %.6f", containerSize.width, totalWidth);
+}
+
+- (void)testThatLayoutIsCorrectWhenWeSwapViewOrder
+{
+  const CGSize containerSize = CGSizeMake(300, 50);
+
+  UIView *container = [[UIView alloc] initWithFrame:CGRectMake(0, 0, containerSize.width, containerSize.height)];
+  container.yoga.isEnabled = YES;
+  container.yoga.flexDirection = YGFlexDirectionRow;
+
+  UIView *subview1 = [[UIView alloc] initWithFrame:CGRectZero];
+  subview1.yoga.isEnabled = YES;
+  subview1.yoga.flexGrow = 1;
+  [container addSubview:subview1];
+
+  UIView *subview2 = [[UIView alloc] initWithFrame:CGRectZero];
+  subview2.yoga.isEnabled = YES;
+  subview2.yoga.flexGrow = 1;
+  [container addSubview:subview2];
+
+  UIView *subview3 = [[UIView alloc] initWithFrame:CGRectZero];
+  subview3.yoga.isEnabled = YES;
+  subview3.yoga.flexGrow = 1;
+  [container addSubview:subview3];
+
+  [container.yoga applyLayout];
+
+  XCTAssertTrue(CGRectEqualToRect(subview1.frame, CGRectMake(0, 0, 100, 50)));
+  XCTAssertTrue(CGRectEqualToRect(subview2.frame, CGRectMake(100, 0, 100, 50)), @"It's actually %@", NSStringFromCGRect(subview2.frame));
+  XCTAssertTrue(CGRectEqualToRect(subview3.frame, CGRectMake(200, 0, 100, 50)));
+
+  [container exchangeSubviewAtIndex:2 withSubviewAtIndex:0];
+  subview2.yoga.isIncludedInLayout = NO;
+  [container.yoga applyLayout];
+
+  XCTAssertTrue(CGRectEqualToRect(subview3.frame, CGRectMake(0, 0, 150, 50)));
+  XCTAssertTrue(CGRectEqualToRect(subview1.frame, CGRectMake(150, 0, 150, 50)));
+
+  // this frame shouldn't have been modified since last time.
+  XCTAssertTrue(CGRectEqualToRect(subview2.frame, CGRectMake(100, 0, 100, 50)));
+}
+
+- (void)testThatWeRespectIncludeInLayoutFlag
+{
+  const CGSize containerSize = CGSizeMake(300, 50);
+
+  UIView *container = [[UIView alloc] initWithFrame:CGRectMake(0, 0, containerSize.width, containerSize.height)];
+  container.yoga.isEnabled = YES;
+  container.yoga.flexDirection = YGFlexDirectionRow;
+
+  UIView *subview1 = [[UIView alloc] initWithFrame:CGRectZero];
+  subview1.yoga.isEnabled = YES;
+  subview1.yoga.flexGrow = 1;
+  [container addSubview:subview1];
+
+  UIView *subview2 = [[UIView alloc] initWithFrame:CGRectZero];
+  subview2.yoga.isEnabled = YES;
+  subview2.yoga.flexGrow = 1;
+  [container addSubview:subview2];
+
+  UIView *subview3 = [[UIView alloc] initWithFrame:CGRectZero];
+  subview3.yoga.isEnabled = YES;
+  subview3.yoga.flexGrow = 1;
+  [container addSubview:subview3];
+
+  [container.yoga applyLayout];
+
+  for (UIView *view in container.subviews) {
+    XCTAssertTrue(CGSizeEqualToSize(CGSizeMake(100, 50), view.bounds.size), @"Actual size is %@", NSStringFromCGSize(view.bounds.size));
+  }
+
+  subview3.yoga.isIncludedInLayout = NO;
+  [container.yoga applyLayout];
+
+  XCTAssertTrue(CGSizeEqualToSize(CGSizeMake(150, 50), subview1.bounds.size), @"Actual size is %@", NSStringFromCGSize(subview1.bounds.size));
+  XCTAssertTrue(CGSizeEqualToSize(CGSizeMake(150, 50), subview2.bounds.size), @"Actual size is %@", NSStringFromCGSize(subview2.bounds.size));
+
+  // We don't set the frame to zero, so, it should be set to what it was previously at.
+  XCTAssertTrue(CGSizeEqualToSize(CGSizeMake(100, 50), subview3.bounds.size), @"Actual size is %@", NSStringFromCGSize(subview3.bounds.size));
+}
+
+- (void)testThatNumberOfChildrenIsCorrectWhenWeIgnoreSubviews
+{
+  UIView *container = [[UIView alloc] initWithFrame:CGRectZero];
+  container.yoga.isEnabled = YES;
+  container.yoga.flexDirection = YGFlexDirectionRow;
+
+  UIView *subview1 = [[UIView alloc] initWithFrame:CGRectZero];
+  subview1.yoga.isEnabled = YES;
+  subview1.yoga.isIncludedInLayout = NO;
+  [container addSubview:subview1];
+
+  UIView *subview2 = [[UIView alloc] initWithFrame:CGRectZero];
+  subview2.yoga.isEnabled = YES;
+  subview2.yoga.isIncludedInLayout = NO;
+  [container addSubview:subview2];
+
+  UIView *subview3 = [[UIView alloc] initWithFrame:CGRectZero];
+  subview3.yoga.isEnabled = YES;
+  subview3.yoga.isIncludedInLayout = YES;
+  [container addSubview:subview3];
+
+  [container.yoga applyLayout];
+  XCTAssertEqual(1, container.yoga.numberOfChildren);
+
+  subview2.yoga.isIncludedInLayout = YES;
+  [container.yoga applyLayout];
+  XCTAssertEqual(2, container.yoga.numberOfChildren);
+}
+
+- (void)testThatViewNotIncludedInFirstLayoutPassAreIncludedInSecond
+{
+  UIView *container = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 300, 50)];
+  container.yoga.isEnabled = YES;
+  container.yoga.flexDirection = YGFlexDirectionRow;
+
+  UIView *subview1 = [[UIView alloc] initWithFrame:CGRectZero];
+  subview1.yoga.isEnabled = YES;
+  subview1.yoga.flexGrow = 1;
+  [container addSubview:subview1];
+
+  UIView *subview2 = [[UIView alloc] initWithFrame:CGRectZero];
+  subview2.yoga.isEnabled = YES;
+  subview2.yoga.flexGrow = 1;
+  [container addSubview:subview2];
+
+  UIView *subview3 = [[UIView alloc] initWithFrame:CGRectZero];
+  subview3.yoga.isEnabled = YES;
+  subview3.yoga.flexGrow = 1;
+  subview3.yoga.isIncludedInLayout = NO;
+  [container addSubview:subview3];
+
+  [container.yoga applyLayout];
+
+  XCTAssertTrue(CGSizeEqualToSize(CGSizeMake(150, 50), subview1.bounds.size), @"Actual size is %@", NSStringFromCGSize(subview1.bounds.size));
+  XCTAssertTrue(CGSizeEqualToSize(CGSizeMake(150, 50), subview2.bounds.size), @"Actual size is %@", NSStringFromCGSize(subview2.bounds.size));
+  XCTAssertTrue(CGSizeEqualToSize(CGSizeZero, subview3.bounds.size), @"Actual size %@", NSStringFromCGSize(subview3.bounds.size));
+
+  subview3.yoga.isIncludedInLayout = YES;
+  [container.yoga applyLayout];
+  for (UIView *view in container.subviews) {
+    XCTAssertTrue(CGSizeEqualToSize(CGSizeMake(100, 50), view.bounds.size), @"Actual size is %@", NSStringFromCGSize(view.bounds.size));
+  }
+}
+
+- (void)testyg_isLeafFlag
+{
+  UIView *view = [[UIView alloc] initWithFrame:CGRectZero];
+  XCTAssertTrue(view.yoga.isLeaf);
+
+  for (int i=0; i<10; i++) {
+    UIView *subview = [[UIView alloc] initWithFrame:CGRectZero];
+    [view addSubview:subview];
+  }
+  XCTAssertTrue(view.yoga.isLeaf);
+
+  view.yoga.isEnabled = YES;
+  view.yoga.width = 50.0;
+  XCTAssertTrue(view.yoga.isLeaf);
+
+  UIView *const subview = view.subviews[0];
+  subview.yoga.isEnabled = YES;
+  subview.yoga.width = 50.0;
+  XCTAssertFalse(view.yoga.isLeaf);
+}
+
+- (void)testThatWeCorrectlyAttachNestedViews
+{
+    UIView *container = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 300, 50)];
+    container.yoga.isEnabled = YES;
+    container.yoga.flexDirection = YGFlexDirectionColumn;
+
+    UIView *subview1 = [[UIView alloc] initWithFrame:CGRectZero];
+    subview1.yoga.isEnabled = YES;
+    subview1.yoga.width = 100;
+    subview1.yoga.flexGrow = 1;
+    subview1.yoga.flexDirection = YGFlexDirectionColumn;
+    [container addSubview:subview1];
+
+    UIView *subview2 = [[UIView alloc] initWithFrame:CGRectZero];
+    subview2.yoga.isEnabled = YES;
+    subview2.yoga.width = 150;
+    subview2.yoga.flexGrow = 1;
+    subview2.yoga.flexDirection = YGFlexDirectionColumn;
+    [container addSubview:subview2];
+
+    for (UIView *view in @[subview1, subview2]) {
+        UIView *someView = [[UIView alloc] initWithFrame:CGRectZero];
+        someView.yoga.isEnabled = YES;
+        someView.yoga.flexGrow = 1;
+        [view addSubview:someView];
+    }
+    [container.yoga applyLayout];
+
+    // Add the same amount of new views, reapply layout.
+    for (UIView *view in @[subview1, subview2]) {
+        UIView *someView = [[UIView alloc] initWithFrame:CGRectZero];
+        someView.yoga.isEnabled = YES;
+        someView.yoga.flexGrow = 1;
+        [view addSubview:someView];
+    }
+    [container.yoga applyLayout];
+
+    XCTAssertTrue(CGSizeEqualToSize(CGSizeMake(100, 25), subview1.bounds.size), @"Actual size is %@", NSStringFromCGSize(subview1.bounds.size));
+    for (UIView *subview in subview1.subviews) {
+        const CGSize subviewSize = subview.bounds.size;
+        XCTAssertFalse(CGSizeEqualToSize(CGSizeZero, subviewSize));
+        XCTAssertFalse(isnan(subviewSize.height));
+        XCTAssertFalse(isnan(subviewSize.width));
+    }
+
+    XCTAssertTrue(CGSizeEqualToSize(CGSizeMake(150, 25), subview2.bounds.size), @"Actual size is %@", NSStringFromCGSize(subview2.bounds.size));
+    for (UIView *subview in subview2.subviews) {
+        const CGSize subviewSize = subview.bounds.size;
+        XCTAssertFalse(CGSizeEqualToSize(CGSizeZero, subview.bounds.size));
+        XCTAssertFalse(isnan(subviewSize.height));
+        XCTAssertFalse(isnan(subviewSize.width));
+    }
+}
+
+- (void)testThatANonLeafNodeCanBecomeALeafNode
+{
+    UIView *container = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 300, 50)];
+    container.yoga.isEnabled = YES;
+
+    UIView *subview1 = [[UIView alloc] initWithFrame:CGRectZero];
+    subview1.yoga.isEnabled = YES;
+    [container addSubview:subview1];
+
+    UIView *subview2 = [[UIView alloc] initWithFrame:CGRectZero];
+    subview2.yoga.isEnabled = YES;
+    [subview1 addSubview:subview2];
+
+    [container.yoga applyLayout];
+    [subview2 removeFromSuperview];
+    [container.yoga applyLayout];
+}
+
+@end

YogaKit/UIView+Yoga.h

@@ -0,0 +1,17 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+#import <UIKit/UIKit.h>
+#import "YGLayout.h"
+
+@interface UIView (Yoga)
+
+@property (nonatomic, readonly, strong) YGLayout *yoga;
+
+@end

YogaKit/UIView+Yoga.m

@@ -0,0 +1,30 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+#import "UIView+Yoga.h"
+#import "YGLayout+Private.h"
+#import <objc/runtime.h>
+
+static const void *kYGYogaAssociatedKey = &kYGYogaAssociatedKey;
+
+@implementation UIView (YogaKit)
+
+- (YGLayout *)yoga
+{
+  YGLayout *yoga = objc_getAssociatedObject(self, kYGYogaAssociatedKey);
+  if (!yoga) {
+    yoga = [[YGLayout alloc] initWithView:self];
+    objc_setAssociatedObject(self, kYGYogaAssociatedKey, yoga, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
+  }
+
+  return yoga;
+}
+
+
+@end

YogaKit/YGLayout+Private.h

@@ -0,0 +1,16 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+#import "YGLayout.h"
+
+@interface YGLayout (Private)
+
+- (instancetype)initWithView:(UIView *)view;
+
+@end

YogaKit/YGLayout.h

@@ -0,0 +1,114 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+#import <UIKit/UIKit.h>
+#import <yoga/YGEnums.h>
+
+@interface YGLayout : NSObject
+
+/**
+  The property that decides if we should include this view when calculating layout. Defaults to YES.
+ */
+@property (nonatomic, readwrite, assign, setter=setIncludedInLayout:) BOOL isIncludedInLayout;
+
+/**
+ The property that decides during layout/sizing whether or not styling properties should be applied. Defaults to NO.
+ */
+@property (nonatomic, readwrite, assign, setter=setEnabled:) BOOL isEnabled;
+
+@property (nonatomic, readwrite, assign) YGDirection direction;
+@property (nonatomic, readwrite, assign) YGFlexDirection flexDirection;
+@property (nonatomic, readwrite, assign) YGJustify justifyContent;
+@property (nonatomic, readwrite, assign) YGAlign alignContent;
+@property (nonatomic, readwrite, assign) YGAlign alignItems;
+@property (nonatomic, readwrite, assign) YGAlign alignSelf;
+@property (nonatomic, readwrite, assign) YGPositionType position;
+@property (nonatomic, readwrite, assign) YGWrap flexWrap;
+@property (nonatomic, readwrite, assign) YGOverflow overflow;
+
+@property (nonatomic, readwrite, assign) CGFloat flexGrow;
+@property (nonatomic, readwrite, assign) CGFloat flexShrink;
+@property (nonatomic, readwrite, assign) CGFloat flexBasis;
+
+@property (nonatomic, readwrite, assign) CGFloat left;
+@property (nonatomic, readwrite, assign) CGFloat top;
+@property (nonatomic, readwrite, assign) CGFloat right;
+@property (nonatomic, readwrite, assign) CGFloat bottom;
+@property (nonatomic, readwrite, assign) CGFloat start;
+@property (nonatomic, readwrite, assign) CGFloat end;
+
+@property (nonatomic, readwrite, assign) CGFloat marginLeft;
+@property (nonatomic, readwrite, assign) CGFloat marginTop;
+@property (nonatomic, readwrite, assign) CGFloat marginRight;
+@property (nonatomic, readwrite, assign) CGFloat marginBottom;
+@property (nonatomic, readwrite, assign) CGFloat marginStart;
+@property (nonatomic, readwrite, assign) CGFloat marginEnd;
+@property (nonatomic, readwrite, assign) CGFloat marginHorizontal;
+@property (nonatomic, readwrite, assign) CGFloat marginVertical;
+@property (nonatomic, readwrite, assign) CGFloat margin;
+
+@property (nonatomic, readwrite, assign) CGFloat paddingLeft;
+@property (nonatomic, readwrite, assign) CGFloat paddingTop;
+@property (nonatomic, readwrite, assign) CGFloat paddingRight;
+@property (nonatomic, readwrite, assign) CGFloat paddingBottom;
+@property (nonatomic, readwrite, assign) CGFloat paddingStart;
+@property (nonatomic, readwrite, assign) CGFloat paddingEnd;
+@property (nonatomic, readwrite, assign) CGFloat paddingHorizontal;
+@property (nonatomic, readwrite, assign) CGFloat paddingVertical;
+@property (nonatomic, readwrite, assign) CGFloat padding;
+
+@property (nonatomic, readwrite, assign) CGFloat borderLeftWidth;
+@property (nonatomic, readwrite, assign) CGFloat borderTopWidth;
+@property (nonatomic, readwrite, assign) CGFloat borderRightWidth;
+@property (nonatomic, readwrite, assign) CGFloat borderBottomWidth;
+@property (nonatomic, readwrite, assign) CGFloat borderStartWidth;
+@property (nonatomic, readwrite, assign) CGFloat borderEndWidth;
+@property (nonatomic, readwrite, assign) CGFloat borderWidth;
+
+@property (nonatomic, readwrite, assign) CGFloat width;
+@property (nonatomic, readwrite, assign) CGFloat height;
+@property (nonatomic, readwrite, assign) CGFloat minWidth;
+@property (nonatomic, readwrite, assign) CGFloat minHeight;
+@property (nonatomic, readwrite, assign) CGFloat maxWidth;
+@property (nonatomic, readwrite, assign) CGFloat maxHeight;
+
+// Yoga specific properties, not compatible with flexbox specification
+@property (nonatomic, readwrite, assign) CGFloat aspectRatio;
+
+/**
+ Get the resolved direction of this node. This won't be YGDirectionInherit
+ */
+ @property (nonatomic, readonly, assign) YGDirection resolvedDirection;
+
+/**
+ Perform a layout calculation and update the frames of the views in the hierarchy with the results
+ */
+- (void)applyLayout NS_SWIFT_NAME(applyLayout());
+
+/**
+ Returns the size of the view if no constraints were given. This could equivalent to calling [self sizeThatFits:CGSizeMake(CGFLOAT_MAX, CGFLOAT_MAX)];
+ */
+ @property (nonatomic, readonly, assign) CGSize intrinsicSize;
+
+/**
+ Returns the number of children that are using Flexbox.
+ */
+ @property (nonatomic, readonly, assign) NSUInteger numberOfChildren;
+
+/**
+ Return a BOOL indiciating whether or not we this node contains any subviews that are included in Yoga's layout.
+ */
+ @property (nonatomic, readonly, assign) BOOL isLeaf;
+
+/**
+ Mark that a view's layout needs to be recalculated. Only works for leaf views.
+ */
+- (void)markDirty;
+
+@end

YogaKit/YGLayout.m

@@ -0,0 +1,380 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+#import "YGLayout+Private.h"
+#import "UIView+Yoga.h"
+#import <yoga/Yoga.h>
+
+#define YG_STYLE_PROPERTY_IMPL(type, lowercased_name, capitalized_name) \
+- (type)lowercased_name                                                 \
+{                                                                       \
+  return YGNodeStyleGet##capitalized_name(self.node);                   \
+}                                                                       \
+                                                                        \
+- (void)set##capitalized_name:(type)lowercased_name                     \
+{                                                                       \
+  YGNodeStyleSet##capitalized_name(self.node, lowercased_name);         \
+}
+
+#define YG_STYLE_EDGE_PROPERTY_IMPL(lowercased_name, capitalized_name, property, edge) \
+- (CGFloat)lowercased_name {                                                           \
+  return YGNodeStyleGet##property(self.node, edge);                                    \
+}                                                                                      \
+                                                                                       \
+- (void)set##capitalized_name:(CGFloat)lowercased_name {                               \
+  YGNodeStyleSet##property(self.node, edge, lowercased_name);                          \
+}
+
+#define YG_STYLE_VALUE_PROPERTY_IMPL(lowercased_name, capitalized_name) \
+- (CGFloat)lowercased_name                                              \
+{                                                                       \
+  YGValue value = YGNodeStyleGet##capitalized_name(self.node);          \
+  if (value.unit == YGUnitPixel) {                                      \
+    return value.value;                                                 \
+  } else {                                                              \
+    return YGUndefined;                                                 \
+  }                                                                     \
+}                                                                       \
+                                                                        \
+- (void)set##capitalized_name:(CGFloat)lowercased_name                  \
+{                                                                       \
+  YGNodeStyleSet##capitalized_name(self.node, lowercased_name);         \
+}
+
+#define YG_STYLE_EDGE_PROPERTY_UNIT_IMPL(lowercased_name, capitalized_name, edge, edge_suffix) \
+- (CGFloat)lowercased_name##edge_suffix                                                        \
+{                                                                                              \
+  YGValue value = YGNodeStyleGet##capitalized_name(self.node, edge);                           \
+  if (value.unit == YGUnitPixel) {                                                             \
+    return value.value;                                                                        \
+  } else {                                                                                     \
+    return YGUndefined;                                                                        \
+  }                                                                                            \
+}                                                                                              \
+                                                                                               \
+- (void)set##capitalized_name##edge_suffix:(CGFloat)lowercased_name                            \
+{                                                                                              \
+  YGNodeStyleSet##capitalized_name(self.node, edge, lowercased_name);                          \
+}
+
+#define YG_STYLE_ALL_EDGE_PROPERTY_UNIT_IMPL(lowercased_name, capitalized_name)                   \
+YG_STYLE_EDGE_PROPERTY_UNIT_IMPL(lowercased_name, capitalized_name, YGEdgeLeft, Left)             \
+YG_STYLE_EDGE_PROPERTY_UNIT_IMPL(lowercased_name, capitalized_name, YGEdgeTop, Top)               \
+YG_STYLE_EDGE_PROPERTY_UNIT_IMPL(lowercased_name, capitalized_name, YGEdgeRight, Right)           \
+YG_STYLE_EDGE_PROPERTY_UNIT_IMPL(lowercased_name, capitalized_name, YGEdgeBottom, Bottom)         \
+YG_STYLE_EDGE_PROPERTY_UNIT_IMPL(lowercased_name, capitalized_name, YGEdgeStart, Start)           \
+YG_STYLE_EDGE_PROPERTY_UNIT_IMPL(lowercased_name, capitalized_name, YGEdgeEnd, End)               \
+YG_STYLE_EDGE_PROPERTY_UNIT_IMPL(lowercased_name, capitalized_name, YGEdgeHorizontal, Horizontal) \
+YG_STYLE_EDGE_PROPERTY_UNIT_IMPL(lowercased_name, capitalized_name, YGEdgeVertical, Vertical)     \
+YG_STYLE_EDGE_PROPERTY_UNIT_IMPL(lowercased_name, capitalized_name, YGEdgeAll, )
+
+@interface YGLayout ()
+
+@property (nonatomic, weak, readonly) UIView *view;
+@property (nonatomic, assign, readonly) YGNodeRef node;
+
+@end
+
+@implementation YGLayout
+
+@synthesize isEnabled=_isEnabled;
+@synthesize isIncludedInLayout=_isIncludedInLayout;
+
++ (void)initialize
+{
+  YGSetExperimentalFeatureEnabled(YGExperimentalFeatureWebFlexBasis, true);
+}
+
+- (instancetype)initWithView:(UIView*)view
+{
+  if (self = [super init]) {
+    _view = view;
+    _node = YGNodeNew();
+    YGNodeSetContext(_node, (__bridge void *) view);
+    _isEnabled = NO;
+    _isIncludedInLayout = YES;
+  }
+
+  return self;
+}
+
+- (void)dealloc
+{
+  YGNodeFree(self.node);
+}
+
+- (void)markDirty
+{
+  if (self.isLeaf) {
+    YGNodeMarkDirty(self.node);
+  }
+}
+
+- (NSUInteger)numberOfChildren
+{
+  return YGNodeGetChildCount(self.node);
+}
+
+- (BOOL)isLeaf
+{
+  NSAssert([NSThread isMainThread], @"This method must be called on the main thread.");
+  if (self.isEnabled) {
+    for (UIView *subview in self.view.subviews) {
+      YGLayout *const yoga = subview.yoga;
+      if (yoga.isEnabled && yoga.isIncludedInLayout) {
+        return NO;
+      }
+    }
+  }
+
+  return YES;
+}
+
+#pragma mark - Style
+
+- (YGPositionType)position
+{
+  return YGNodeStyleGetPositionType(self.node);
+}
+
+- (void)setPosition:(YGPositionType)position
+{
+  YGNodeStyleSetPositionType(self.node, position);
+}
+
+YG_STYLE_PROPERTY_IMPL(YGDirection, direction, Direction)
+YG_STYLE_PROPERTY_IMPL(YGFlexDirection, flexDirection, FlexDirection)
+YG_STYLE_PROPERTY_IMPL(YGJustify, justifyContent, JustifyContent)
+YG_STYLE_PROPERTY_IMPL(YGAlign, alignContent, AlignContent)
+YG_STYLE_PROPERTY_IMPL(YGAlign, alignItems, AlignItems)
+YG_STYLE_PROPERTY_IMPL(YGAlign, alignSelf, AlignSelf)
+YG_STYLE_PROPERTY_IMPL(YGWrap, flexWrap, FlexWrap)
+YG_STYLE_PROPERTY_IMPL(YGOverflow, overflow, Overflow)
+
+YG_STYLE_PROPERTY_IMPL(CGFloat, flexGrow, FlexGrow)
+YG_STYLE_PROPERTY_IMPL(CGFloat, flexShrink, FlexShrink)
+YG_STYLE_VALUE_PROPERTY_IMPL(flexBasis, FlexBasis)
+
+YG_STYLE_EDGE_PROPERTY_UNIT_IMPL(position, Position, YGEdgeLeft, Left)
+YG_STYLE_EDGE_PROPERTY_UNIT_IMPL(position, Position, YGEdgeTop, Top)
+YG_STYLE_EDGE_PROPERTY_UNIT_IMPL(position, Position, YGEdgeRight, Right)
+YG_STYLE_EDGE_PROPERTY_UNIT_IMPL(position, Position, YGEdgeBottom, Bottom)
+YG_STYLE_EDGE_PROPERTY_UNIT_IMPL(position, Position, YGEdgeStart, Start)
+YG_STYLE_EDGE_PROPERTY_UNIT_IMPL(position, Position, YGEdgeEnd, End)
+YG_STYLE_ALL_EDGE_PROPERTY_UNIT_IMPL(margin, Margin)
+YG_STYLE_ALL_EDGE_PROPERTY_UNIT_IMPL(padding, Padding)
+
+YG_STYLE_EDGE_PROPERTY_IMPL(borderLeftWidth, BorderLeftWidth, Border, YGEdgeLeft)
+YG_STYLE_EDGE_PROPERTY_IMPL(borderTopWidth, BorderTopWidth, Border, YGEdgeTop)
+YG_STYLE_EDGE_PROPERTY_IMPL(borderRightWidth, BorderRightWidth, Border, YGEdgeRight)
+YG_STYLE_EDGE_PROPERTY_IMPL(borderBottomWidth, BorderBottomWidth, Border, YGEdgeBottom)
+YG_STYLE_EDGE_PROPERTY_IMPL(borderStartWidth, BorderStartWidth, Border, YGEdgeStart)
+YG_STYLE_EDGE_PROPERTY_IMPL(borderEndWidth, BorderEndWidth, Border, YGEdgeEnd)
+YG_STYLE_EDGE_PROPERTY_IMPL(borderWidth, BorderWidth, Border, YGEdgeAll)
+
+YG_STYLE_VALUE_PROPERTY_IMPL(width, Width)
+YG_STYLE_VALUE_PROPERTY_IMPL(height, Height)
+YG_STYLE_VALUE_PROPERTY_IMPL(minWidth, MinWidth)
+YG_STYLE_VALUE_PROPERTY_IMPL(minHeight, MinHeight)
+YG_STYLE_VALUE_PROPERTY_IMPL(maxWidth, MaxWidth)
+YG_STYLE_VALUE_PROPERTY_IMPL(maxHeight, MaxHeight)
+YG_STYLE_PROPERTY_IMPL(CGFloat, aspectRatio, AspectRatio)
+
+#pragma mark - Layout and Sizing
+
+- (YGDirection)resolvedDirection
+{
+  return YGNodeLayoutGetDirection(self.node);
+}
+
+- (void)applyLayout
+{
+  [self calculateLayoutWithSize:self.view.bounds.size];
+  YGApplyLayoutToViewHierarchy(self.view);
+}
+
+- (CGSize)intrinsicSize
+{
+  const CGSize constrainedSize = {
+    .width = YGUndefined,
+    .height = YGUndefined,
+  };
+  return [self calculateLayoutWithSize:constrainedSize];
+}
+
+#pragma mark - Private
+
+- (CGSize)calculateLayoutWithSize:(CGSize)size
+{
+  NSAssert([NSThread isMainThread], @"Yoga calculation must be done on main.");
+  NSAssert(self.isEnabled, @"Yoga is not enabled for this view.");
+
+  YGAttachNodesFromViewHierachy(self.view);
+
+  const YGNodeRef node = self.node;
+  YGNodeCalculateLayout(
+    node,
+    size.width,
+    size.height,
+    YGNodeStyleGetDirection(node));
+
+  return (CGSize) {
+    .width = YGNodeLayoutGetWidth(node),
+    .height = YGNodeLayoutGetHeight(node),
+  };
+}
+
+static YGSize YGMeasureView(
+  YGNodeRef node,
+  float width,
+  YGMeasureMode widthMode,
+  float height,
+  YGMeasureMode heightMode)
+{
+  const CGFloat constrainedWidth = (widthMode == YGMeasureModeUndefined) ? CGFLOAT_MAX : width;
+  const CGFloat constrainedHeight = (heightMode == YGMeasureModeUndefined) ? CGFLOAT_MAX: height;
+
+  UIView *view = (__bridge UIView*) YGNodeGetContext(node);
+  const CGSize sizeThatFits = [view sizeThatFits:(CGSize) {
+    .width = constrainedWidth,
+    .height = constrainedHeight,
+  }];
+
+  return (YGSize) {
+    .width = YGSanitizeMeasurement(constrainedWidth, sizeThatFits.width, widthMode),
+    .height = YGSanitizeMeasurement(constrainedHeight, sizeThatFits.height, heightMode),
+  };
+}
+
+static CGFloat YGSanitizeMeasurement(
+  CGFloat constrainedSize,
+  CGFloat measuredSize,
+  YGMeasureMode measureMode)
+{
+  CGFloat result;
+  if (measureMode == YGMeasureModeExactly) {
+    result = constrainedSize;
+  } else if (measureMode == YGMeasureModeAtMost) {
+    result = MIN(constrainedSize, measuredSize);
+  } else {
+    result = measuredSize;
+  }
+
+  return result;
+}
+
+static BOOL YGNodeHasExactSameChildren(const YGNodeRef node, NSArray<UIView *> *subviews)
+{
+  if (YGNodeGetChildCount(node) != subviews.count) {
+    return NO;
+  }
+
+  for (int i=0; i<subviews.count; i++) {
+    if (YGNodeGetChild(node, i) != subviews[i].yoga.node) {
+      return NO;
+    }
+  }
+
+  return YES;
+}
+
+static void YGAttachNodesFromViewHierachy(UIView *const view)
+{
+  YGLayout *const yoga = view.yoga;
+  const YGNodeRef node = yoga.node;
+
+  // Only leaf nodes should have a measure function
+  if (yoga.isLeaf) {
+    YGRemoveAllChildren(node);
+    YGNodeSetMeasureFunc(node, YGMeasureView);
+  } else {
+    YGNodeSetMeasureFunc(node, NULL);
+
+    NSMutableArray<UIView *> *subviewsToInclude = [[NSMutableArray alloc] initWithCapacity:view.subviews.count];
+    for (UIView *subview in view.subviews) {
+      if (subview.yoga.isIncludedInLayout) {
+        [subviewsToInclude addObject:subview];
+      }
+    }
+
+    if (!YGNodeHasExactSameChildren(node, subviewsToInclude)) {
+      YGRemoveAllChildren(node);
+      for (int i=0; i<subviewsToInclude.count; i++) {
+        YGNodeInsertChild(node, subviewsToInclude[i].yoga.node, i);
+      }
+    }
+
+    for (UIView *const subview in subviewsToInclude) {
+      YGAttachNodesFromViewHierachy(subview);
+    }
+  }
+}
+
+static void YGRemoveAllChildren(const YGNodeRef node)
+{
+  if (node == NULL) {
+    return;
+  }
+
+  while (YGNodeGetChildCount(node) > 0) {
+    YGNodeRemoveChild(node, YGNodeGetChild(node, YGNodeGetChildCount(node) - 1));
+  }
+}
+
+static CGFloat YGRoundPixelValue(CGFloat value)
+{
+  static CGFloat scale;
+  static dispatch_once_t onceToken;
+  dispatch_once(&onceToken, ^(){
+    scale = [UIScreen mainScreen].scale;
+  });
+
+  return round(value * scale) / scale;
+}
+
+static void YGApplyLayoutToViewHierarchy(UIView *view)
+{
+  NSCAssert([NSThread isMainThread], @"Framesetting should only be done on the main thread.");
+
+  const YGLayout *yoga = view.yoga;
+
+  if (!yoga.isIncludedInLayout) {
+     return;
+  }
+
+  YGNodeRef node = yoga.node;
+  const CGPoint topLeft = {
+    YGNodeLayoutGetLeft(node),
+    YGNodeLayoutGetTop(node),
+  };
+
+  const CGPoint bottomRight = {
+    topLeft.x + YGNodeLayoutGetWidth(node),
+    topLeft.y + YGNodeLayoutGetHeight(node),
+  };
+
+  view.frame = (CGRect) {
+    .origin = {
+      .x = YGRoundPixelValue(topLeft.x),
+      .y = YGRoundPixelValue(topLeft.y),
+    },
+    .size = {
+      .width = YGRoundPixelValue(bottomRight.x) - YGRoundPixelValue(topLeft.x),
+      .height = YGRoundPixelValue(bottomRight.y) - YGRoundPixelValue(topLeft.y),
+    },
+  };
+
+  if (!yoga.isLeaf) {
+    for (NSUInteger i=0; i<view.subviews.count; i++) {
+      YGApplyLayoutToViewHierarchy(view.subviews[i]);
+    }
+  }
+}
+
+@end

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+			isa = XCConfigurationList;
+			buildConfigurations = (
+				13687D5B1DF8748400E7C260 /* Debug */,
+				13687D5C1DF8748400E7C260 /* Release */,
+			);
+			defaultConfigurationIsVisible = 0;
+			defaultConfigurationName = Release;
+		};
+/* End XCConfigurationList section */
+	};
+	rootObject = 13687D3B1DF8748300E7C260 /* Project object */;
+}

YogaKit/YogaKitSample/YogaKitSample.xcodeproj/project.xcworkspace/contents.xcworkspacedata

@@ -0,0 +1,7 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Workspace
+   version = "1.0">
+   <FileRef
+      location = "self:YogaKitSample.xcodeproj">
+   </FileRef>
+</Workspace>

YogaKit/YogaKitSample/YogaKitSample/AppDelegate.h

@@ -0,0 +1,16 @@
+/**
+ * Copyright 2014-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the license found in the
+ * LICENSE-examples file in the root directory of this source tree.
+ */
+
+#import <UIKit/UIKit.h>
+
+@interface AppDelegate : UIResponder <UIApplicationDelegate>
+
+@property (strong, nonatomic) UIWindow *window;
+
+@end
+

YogaKit/YogaKitSample/YogaKitSample/AppDelegate.m

@@ -0,0 +1,27 @@
+/**
+ * Copyright 2014-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the license found in the
+ * LICENSE-examples file in the root directory of this source tree.
+ */
+
+#import "AppDelegate.h"
+#import "ViewController.h"
+
+@interface AppDelegate ()
+
+@end
+
+@implementation AppDelegate
+
+
+- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
+    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
+    self.window.rootViewController = [ViewController new];
+    self.window.backgroundColor = [UIColor whiteColor];
+    [self.window makeKeyAndVisible];
+    return YES;
+}
+
+@end

YogaKit/YogaKitSample/YogaKitSample/Assets.xcassets/AppIcon.appiconset/Contents.json

@@ -0,0 +1,48 @@
+{
+  "images" : [
+    {
+      "idiom" : "iphone",
+      "size" : "20x20",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "iphone",
+      "size" : "20x20",
+      "scale" : "3x"
+    },
+    {
+      "idiom" : "iphone",
+      "size" : "29x29",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "iphone",
+      "size" : "29x29",
+      "scale" : "3x"
+    },
+    {
+      "idiom" : "iphone",
+      "size" : "40x40",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "iphone",
+      "size" : "40x40",
+      "scale" : "3x"
+    },
+    {
+      "idiom" : "iphone",
+      "size" : "60x60",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "iphone",
+      "size" : "60x60",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

YogaKit/YogaKitSample/YogaKitSample/Info.plist

@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>en</string>
+	<key>CFBundleExecutable</key>
+	<string>$(EXECUTABLE_NAME)</string>
+	<key>CFBundleIdentifier</key>
+	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleName</key>
+	<string>$(PRODUCT_NAME)</string>
+	<key>CFBundlePackageType</key>
+	<string>APPL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleVersion</key>
+	<string>1</string>
+	<key>LSRequiresIPhoneOS</key>
+	<true/>
+	<key>UILaunchStoryboardName</key>
+	<string></string>
+	<key>UIRequiredDeviceCapabilities</key>
+	<array>
+		<string>armv7</string>
+	</array>
+	<key>UISupportedInterfaceOrientations</key>
+	<array>
+		<string>UIInterfaceOrientationPortrait</string>
+		<string>UIInterfaceOrientationLandscapeLeft</string>
+		<string>UIInterfaceOrientationLandscapeRight</string>
+	</array>
+</dict>
+</plist>

YogaKit/YogaKitSample/YogaKitSample/SwiftViewController.swift

@@ -0,0 +1,40 @@
+/**
+ * Copyright 2014-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the license found in the
+ * LICENSE-examples file in the root directory of this source tree.
+ */
+
+import UIKit
+
+class SwiftViewController: UIViewController {
+  override func viewDidLoad() {
+    let root = self.view!
+    root.backgroundColor = .red
+    root.yoga.isEnabled = true
+    root.yoga.width = self.view.bounds.size.width
+    root.yoga.height = self.view.bounds.size.height
+    root.yoga.alignItems = .center
+    root.yoga.justifyContent = .center
+
+    let child1 = UIView()
+    child1.backgroundColor = .blue
+    child1.yoga.isEnabled = true
+    child1.yoga.width = 100
+    child1.yoga.height = 10
+
+    let child2 = UIView()
+    child2.backgroundColor = .green
+    child2.frame = CGRect(x: 0, y: 0, width: 200, height: 100)
+
+    let child3 = UIView()
+    child3.backgroundColor = .yellow
+    child3.frame = CGRect(x: 0, y: 0, width: 100, height: 100)
+
+    child2.addSubview(child3)
+    root.addSubview(child1)
+    root.addSubview(child2)
+    root.yoga.applyLayout()
+  }
+}

YogaKit/YogaKitSample/YogaKitSample/ViewController.h

@@ -0,0 +1,15 @@
+/**
+ * Copyright 2014-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the license found in the
+ * LICENSE-examples file in the root directory of this source tree.
+ */
+
+#import <UIKit/UIKit.h>
+
+@interface ViewController : UIViewController
+
+
+@end
+

YogaKit/YogaKitSample/YogaKitSample/ViewController.m

@@ -0,0 +1,60 @@
+/**
+ * Copyright 2014-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the license found in the
+ * LICENSE-examples file in the root directory of this source tree.
+ */
+
+#import "ViewController.h"
+
+#import <YogaKit/UIView+Yoga.h>
+
+@interface ViewController ()
+
+@end
+
+@implementation ViewController
+
+- (void)viewDidLoad
+{
+    UIView *root = self.view;
+    root.backgroundColor = [UIColor redColor];
+    root.yoga.isEnabled = YES;
+    root.yoga.width = self.view.bounds.size.width;
+    root.yoga.height = self.view.bounds.size.height;
+    root.yoga.alignItems = YGAlignCenter;
+    root.yoga.justifyContent = YGJustifyCenter;
+
+    UIView *child1 = [UIView new];
+    child1.backgroundColor = [UIColor blueColor];
+    child1.yoga.isEnabled = YES;
+    child1.yoga.width = 100;
+    child1.yoga.height = 100;
+
+    UIView *child2 = [UIView new];
+    child2.backgroundColor = [UIColor greenColor];
+    child2.frame = (CGRect) {
+        .size = {
+            .width = 200,
+            .height = 100,
+        }
+    };
+
+    UIView *child3 = [UIView new];
+    child3.backgroundColor = [UIColor yellowColor];
+    child3.frame = (CGRect) {
+        .size = {
+            .width = 100,
+            .height = 100,
+        }
+    };
+
+    [child2 addSubview:child3];
+    [root addSubview:child1];
+    [root addSubview:child2];
+    [root.yoga applyLayout];
+}
+
+
+@end

YogaKit/YogaKitSample/YogaKitSample/YogaKitSample-Bridging-Header.h

@@ -0,0 +1,10 @@
+/**
+ * Copyright 2014-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the license found in the
+ * LICENSE-examples file in the root directory of this source tree.
+ */
+
+#import "UIView+Yoga.h"
+#import <yoga/Yoga.h>

YogaKit/YogaKitSample/YogaKitSample/main.m

@@ -0,0 +1,16 @@
+/**
+ * Copyright 2014-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the license found in the
+ * LICENSE-examples file in the root directory of this source tree.
+ */
+
+#import <UIKit/UIKit.h>
+#import "AppDelegate.h"
+
+int main(int argc, char * argv[]) {
+    @autoreleasepool {
+        return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class]));
+    }
+}

benchmark/BUCK

@@ -5,7 +5,7 @@
 # LICENSE file in the root directory of this source tree. An additional grant
 # of patent rights can be found in the PATENTS file in the same directory.
 
-include_defs('//CSSLAYOUT_DEFS')
+include_defs('//YOGA_DEFS')
 
 cxx_binary(
   name = 'benchmark',
@@ -21,7 +21,7 @@ cxx_binary(
     '-std=c11',
   ],
   deps = [
-    csslayout_dep(':CSSLayout'),
+    yoga_dep(':yoga'),
   ],
   visibility = ['PUBLIC'],
 )

benchmark/CSSBenchmark.c

@@ -1,118 +0,0 @@
-/**
- * Copyright (c) 2014-present, Facebook, Inc.
- * All rights reserved.
- *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
- */
-
-#include "CSSBenchmark.h"
-
-#include <CSSLayout/CSSLayout.h>
-
-static CSSSize _measure(CSSNodeRef node,
-                        float width,
-                        CSSMeasureMode widthMode,
-                        float height,
-                        CSSMeasureMode heightMode) {
-  return (CSSSize){
-      .width = widthMode == CSSMeasureModeUndefined ? 10 : width,
-      .height = heightMode == CSSMeasureModeUndefined ? 10 : width,
-  };
-}
-
-CSS_BENCHMARKS({
-
-  CSS_BENCHMARK("Stack with flex", {
-    const CSSNodeRef root = CSSNodeNew();
-    CSSNodeStyleSetWidth(root, 100);
-    CSSNodeStyleSetHeight(root, 100);
-
-    for (uint32_t i = 0; i < 10; i++) {
-      const CSSNodeRef child = CSSNodeNew();
-      CSSNodeSetMeasureFunc(child, _measure);
-      CSSNodeStyleSetFlex(child, 1);
-      CSSNodeInsertChild(root, child, 0);
-    }
-
-    CSSNodeCalculateLayout(root, CSSUndefined, CSSUndefined, CSSDirectionLTR);
-    CSSNodeFreeRecursive(root);
-  });
-
-  CSS_BENCHMARK("Align stretch in undefined axis", {
-    const CSSNodeRef root = CSSNodeNew();
-
-    for (uint32_t i = 0; i < 10; i++) {
-      const CSSNodeRef child = CSSNodeNew();
-      CSSNodeStyleSetHeight(child, 20);
-      CSSNodeSetMeasureFunc(child, _measure);
-      CSSNodeInsertChild(root, child, 0);
-    }
-
-    CSSNodeCalculateLayout(root, CSSUndefined, CSSUndefined, CSSDirectionLTR);
-    CSSNodeFreeRecursive(root);
-  });
-
-  CSS_BENCHMARK("Nested flex", {
-    const CSSNodeRef root = CSSNodeNew();
-
-    for (uint32_t i = 0; i < 10; i++) {
-      const CSSNodeRef child = CSSNodeNew();
-      CSSNodeStyleSetFlex(child, 1);
-      CSSNodeInsertChild(root, child, 0);
-
-      for (uint32_t ii = 0; ii < 10; ii++) {
-        const CSSNodeRef grandChild = CSSNodeNew();
-        CSSNodeSetMeasureFunc(grandChild, _measure);
-        CSSNodeStyleSetFlex(grandChild, 1);
-        CSSNodeInsertChild(child, grandChild, 0);
-      }
-    }
-
-    CSSNodeCalculateLayout(root, CSSUndefined, CSSUndefined, CSSDirectionLTR);
-    CSSNodeFreeRecursive(root);
-  });
-
-  CSS_BENCHMARK("Huge nested layout", {
-    const CSSNodeRef root = CSSNodeNew();
-
-    for (uint32_t i = 0; i < 10; i++) {
-      const CSSNodeRef child = CSSNodeNew();
-      CSSNodeStyleSetFlexGrow(child, 1);
-      CSSNodeStyleSetWidth(child, 10);
-      CSSNodeStyleSetHeight(child, 10);
-      CSSNodeInsertChild(root, child, 0);
-
-      for (uint32_t ii = 0; ii < 10; ii++) {
-        const CSSNodeRef grandChild = CSSNodeNew();
-        CSSNodeStyleSetFlexDirection(grandChild, CSSFlexDirectionRow);
-        CSSNodeStyleSetFlexGrow(grandChild, 1);
-        CSSNodeStyleSetWidth(grandChild, 10);
-        CSSNodeStyleSetHeight(grandChild, 10);
-        CSSNodeInsertChild(child, grandChild, 0);
-
-        for (uint32_t iii = 0; iii < 10; iii++) {
-          const CSSNodeRef grandGrandChild = CSSNodeNew();
-          CSSNodeStyleSetFlexGrow(grandGrandChild, 1);
-          CSSNodeStyleSetWidth(grandGrandChild, 10);
-          CSSNodeStyleSetHeight(grandGrandChild, 10);
-          CSSNodeInsertChild(grandChild, grandGrandChild, 0);
-
-          for (uint32_t iii = 0; iii < 10; iii++) {
-            const CSSNodeRef grandGrandGrandChild = CSSNodeNew();
-            CSSNodeStyleSetFlexDirection(grandGrandGrandChild, CSSFlexDirectionRow);
-            CSSNodeStyleSetFlexGrow(grandGrandGrandChild, 1);
-            CSSNodeStyleSetWidth(grandGrandGrandChild, 10);
-            CSSNodeStyleSetHeight(grandGrandGrandChild, 10);
-            CSSNodeInsertChild(grandGrandChild, grandGrandGrandChild, 0);
-          }
-        }
-      }
-    }
-
-    CSSNodeCalculateLayout(root, CSSUndefined, CSSUndefined, CSSDirectionLTR);
-    CSSNodeFreeRecursive(root);
-  });
-
-});

benchmark/YGBenchmark.c

@@ -0,0 +1,118 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+#include "YGBenchmark.h"
+
+#include <yoga/Yoga.h>
+
+static YGSize _measure(YGNodeRef node,
+                        float width,
+                        YGMeasureMode widthMode,
+                        float height,
+                        YGMeasureMode heightMode) {
+  return (YGSize){
+      .width = widthMode == YGMeasureModeUndefined ? 10 : width,
+      .height = heightMode == YGMeasureModeUndefined ? 10 : width,
+  };
+}
+
+YGBENCHMARKS({
+
+  YGBENCHMARK("Stack with flex", {
+    const YGNodeRef root = YGNodeNew();
+    YGNodeStyleSetWidth(root, 100);
+    YGNodeStyleSetHeight(root, 100);
+
+    for (uint32_t i = 0; i < 10; i++) {
+      const YGNodeRef child = YGNodeNew();
+      YGNodeSetMeasureFunc(child, _measure);
+      YGNodeStyleSetFlex(child, 1);
+      YGNodeInsertChild(root, child, 0);
+    }
+
+    YGNodeCalculateLayout(root, YGUndefined, YGUndefined, YGDirectionLTR);
+    YGNodeFreeRecursive(root);
+  });
+
+  YGBENCHMARK("Align stretch in undefined axis", {
+    const YGNodeRef root = YGNodeNew();
+
+    for (uint32_t i = 0; i < 10; i++) {
+      const YGNodeRef child = YGNodeNew();
+      YGNodeStyleSetHeight(child, 20);
+      YGNodeSetMeasureFunc(child, _measure);
+      YGNodeInsertChild(root, child, 0);
+    }
+
+    YGNodeCalculateLayout(root, YGUndefined, YGUndefined, YGDirectionLTR);
+    YGNodeFreeRecursive(root);
+  });
+
+  YGBENCHMARK("Nested flex", {
+    const YGNodeRef root = YGNodeNew();
+
+    for (uint32_t i = 0; i < 10; i++) {
+      const YGNodeRef child = YGNodeNew();
+      YGNodeStyleSetFlex(child, 1);
+      YGNodeInsertChild(root, child, 0);
+
+      for (uint32_t ii = 0; ii < 10; ii++) {
+        const YGNodeRef grandChild = YGNodeNew();
+        YGNodeSetMeasureFunc(grandChild, _measure);
+        YGNodeStyleSetFlex(grandChild, 1);
+        YGNodeInsertChild(child, grandChild, 0);
+      }
+    }
+
+    YGNodeCalculateLayout(root, YGUndefined, YGUndefined, YGDirectionLTR);
+    YGNodeFreeRecursive(root);
+  });
+
+  YGBENCHMARK("Huge nested layout", {
+    const YGNodeRef root = YGNodeNew();
+
+    for (uint32_t i = 0; i < 10; i++) {
+      const YGNodeRef child = YGNodeNew();
+      YGNodeStyleSetFlexGrow(child, 1);
+      YGNodeStyleSetWidth(child, 10);
+      YGNodeStyleSetHeight(child, 10);
+      YGNodeInsertChild(root, child, 0);
+
+      for (uint32_t ii = 0; ii < 10; ii++) {
+        const YGNodeRef grandChild = YGNodeNew();
+        YGNodeStyleSetFlexDirection(grandChild, YGFlexDirectionRow);
+        YGNodeStyleSetFlexGrow(grandChild, 1);
+        YGNodeStyleSetWidth(grandChild, 10);
+        YGNodeStyleSetHeight(grandChild, 10);
+        YGNodeInsertChild(child, grandChild, 0);
+
+        for (uint32_t iii = 0; iii < 10; iii++) {
+          const YGNodeRef grandGrandChild = YGNodeNew();
+          YGNodeStyleSetFlexGrow(grandGrandChild, 1);
+          YGNodeStyleSetWidth(grandGrandChild, 10);
+          YGNodeStyleSetHeight(grandGrandChild, 10);
+          YGNodeInsertChild(grandChild, grandGrandChild, 0);
+
+          for (uint32_t iii = 0; iii < 10; iii++) {
+            const YGNodeRef grandGrandGrandChild = YGNodeNew();
+            YGNodeStyleSetFlexDirection(grandGrandGrandChild, YGFlexDirectionRow);
+            YGNodeStyleSetFlexGrow(grandGrandGrandChild, 1);
+            YGNodeStyleSetWidth(grandGrandGrandChild, 10);
+            YGNodeStyleSetHeight(grandGrandGrandChild, 10);
+            YGNodeInsertChild(grandGrandChild, grandGrandGrandChild, 0);
+          }
+        }
+      }
+    }
+
+    YGNodeCalculateLayout(root, YGUndefined, YGUndefined, YGDirectionLTR);
+    YGNodeFreeRecursive(root);
+  });
+
+});

benchmark/YGBenchmark.h

@@ -17,7 +17,7 @@
 
 #define NUM_REPETITIONS 1000
 
-#define CSS_BENCHMARKS(BLOCK)              \
+#define YGBENCHMARKS(BLOCK)              \
   int main(int argc, char const *argv[]) { \
     clock_t __start;                       \
     clock_t __endTimes[NUM_REPETITIONS];   \
@@ -25,7 +25,7 @@
     return 0;                              \
   }
 
-#define CSS_BENCHMARK(NAME, BLOCK)                       \
+#define YGBENCHMARK(NAME, BLOCK)                       \
   __start = clock();                                     \
   for (uint32_t __i = 0; __i < NUM_REPETITIONS; __i++) { \
     { BLOCK }                                            \

csharp/.gitignore

@@ -34,6 +34,10 @@ bld/
 # NUNIT
 *.VisualState.xml
 TestResult.xml
+tests/Facebook.Yoga/NUnit-[0-9\.]*/
+tests/Facebook.Yoga/YogaTest.dll
+tests/Facebook.Yoga/YogaTest.dll.mdb
+tests/Facebook.Yoga/libyoga.dylib
 
 # Build Results of an ATL Project
 [Dd]ebugPS/
@@ -262,4 +266,4 @@ paket-files/
 
 # Python Tools for Visual Studio (PTVS)
 __pycache__/
-*.pyc
+*.pyc

csharp/.hgignore

@@ -34,6 +34,10 @@ bld/
 # NUNIT
 *.VisualState.xml
 TestResult.xml
+tests/Facebook.Yoga/NUnit-[0-9\.]*/
+tests/Facebook.Yoga/YogaTest.dll
+tests/Facebook.Yoga/YogaTest.dll.mdb
+tests/Facebook.Yoga/libyoga.dylib
 
 # Build Results of an ATL Project
 [Dd]ebugPS/
@@ -262,4 +266,4 @@ paket-files/
 
 # Python Tools for Visual Studio (PTVS)
 __pycache__/
-*.pyc
+*.pyc

csharp/BUCK

@@ -5,16 +5,59 @@
 # LICENSE file in the root directory of this source tree. An additional grant
 # of patent rights can be found in the PATENTS file in the same directory.
 
+include_defs('//YOGA_DEFS')
+
+COMPILER_FLAGS = BASE_COMPILER_FLAGS + ['-std=c++11']
+
 csharp_library(
-  name = 'csslibnet46',
-  dll_name = 'Facebook.CSSLayout.dll',
+  name = 'yogalibnet46',
+  dll_name = 'Facebook.Yoga.dll',
   framework_ver = 'net46',
   srcs = glob(['**/*.cs']),
 )
 
 csharp_library(
-  name = 'csslibnet45',
-  dll_name = 'Facebook.CSSLayout.dll',
+  name = 'yogalibnet45',
+  dll_name = 'Facebook.Yoga.dll',
   framework_ver = 'net45',
   srcs = glob(['**/*.cs']),
 )
+
+cxx_library(
+  name = 'yoganet',
+  soname = 'libyoga.$(ext)',
+  srcs = glob(['Yoga/YGInterop.cpp']),
+  compiler_flags = COMPILER_FLAGS,
+  link_style = 'static',
+  link_whole = True,
+  deps = [yoga_dep(':yoga')],
+  visibility = ['PUBLIC'],
+)
+
+with allow_unsafe_import():
+  import os
+
+if os.path.isdir('/Applications/Xcode.app'):
+  yoganet_ios_srcs = []
+  for arch in ['iphonesimulator-x86_64', 'iphoneos-arm64', 'iphoneos-armv7']:
+    name = 'yoganet-' + arch
+    yoganet_ios_srcs.append(':' + name)
+    genrule(
+      name = name,
+      srcs = [
+        yoga_dep(':yoga#%s,static' % arch),
+        yoga_dep('YogaKit:YogaKit#%s,static' % arch),
+        yoga_dep('csharp:yoganet#%s,static' % arch),
+      ],
+      out = 'libyoga-%s.a' % arch,
+      cmd = 'libtool -static -o $OUT $SRCS',
+      visibility = [yoga_dep('csharp:yoganet-ios')],
+    )
+
+  genrule(
+    name = 'yoganet-ios',
+    srcs = yoganet_ios_srcs,
+    out = 'libyoga.a',
+    cmd = 'lipo $SRCS -create -output $OUT',
+    visibility = ['PUBLIC'],
+  )

csharp/Facebook.CSSLayout.sln

@@ -1,46 +0,0 @@
-
-Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 14
-VisualStudioVersion = 14.0.25420.1
-MinimumVisualStudioVersion = 10.0.40219.1
-Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "CSSLayout", "CSSLayout\CSSLayout.vcxproj", "{0446C86B-F47B-4C46-B673-C7AE0CFF35D5}"
-EndProject
-Project("{8BB2217D-0F2D-49D1-97BC-3654ED321F3B}") = "Facebook.CSSLayout", "Facebook.CSSLayout\Facebook.CSSLayout.xproj", "{75BB7605-E54B-4EDE-8F5A-FF1F24464236}"
-EndProject
-Global
-	GlobalSection(SolutionConfigurationPlatforms) = preSolution
-		Debug|Any CPU = Debug|Any CPU
-		Debug|x64 = Debug|x64
-		Debug|x86 = Debug|x86
-		Release|Any CPU = Release|Any CPU
-		Release|x64 = Release|x64
-		Release|x86 = Release|x86
-	EndGlobalSection
-	GlobalSection(ProjectConfigurationPlatforms) = postSolution
-		{0446C86B-F47B-4C46-B673-C7AE0CFF35D5}.Debug|Any CPU.ActiveCfg = Debug|Win32
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-		{0446C86B-F47B-4C46-B673-C7AE0CFF35D5}.Release|x86.Build.0 = Release|Win32
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-		{75BB7605-E54B-4EDE-8F5A-FF1F24464236}.Debug|Any CPU.Build.0 = Debug|Any CPU
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-	EndGlobalSection
-	GlobalSection(SolutionProperties) = preSolution
-		HideSolutionNode = FALSE
-	EndGlobalSection
-EndGlobal

csharp/Facebook.CSSLayout/CSSNode.cs

@@ -1,584 +0,0 @@
-/**
- * Copyright (c) 2014-present, Facebook, Inc.
- * All rights reserved.
- *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
- */
-
-using System;
-using System.Collections;
-using System.Collections.Generic;
-using System.Runtime.InteropServices;
-using System.Text;
-
-namespace Facebook.CSSLayout
-{
-    public partial class CSSNode : IEnumerable<CSSNode>
-    {
-        private IntPtr _cssNode;
-        private WeakReference _parent;
-        private List<CSSNode> _children;
-        private MeasureFunction _measureFunction;
-        private CSSMeasureFunc _cssMeasureFunc;
-        private object _data;
-
-        public CSSNode()
-        {
-            CSSLogger.Initialize();
-
-            _cssNode = Native.CSSNodeNew();
-            if (_cssNode == IntPtr.Zero)
-            {
-                throw new InvalidOperationException("Failed to allocate native memory");
-            }
-        }
-
-        ~CSSNode()
-        {
-            Native.CSSNodeFree(_cssNode);
-        }
-
-        public void Reset()
-        {
-            _measureFunction = null;
-            _data = null;
-
-            Native.CSSNodeReset(_cssNode);
-        }
-
-        public bool IsDirty
-        {
-            get
-            {
-                return Native.CSSNodeIsDirty(_cssNode);
-            }
-        }
-
-        public virtual void MarkDirty()
-        {
-            Native.CSSNodeMarkDirty(_cssNode);
-        }
-
-        public bool HasNewLayout
-        {
-            get
-            {
-                return Native.CSSNodeGetHasNewLayout(_cssNode);
-            }
-        }
-
-        public void MarkHasNewLayout()
-        {
-            Native.CSSNodeSetHasNewLayout(_cssNode, true);
-        }
-
-        public CSSNode Parent
-        {
-            get
-            {
-                return _parent != null ? _parent.Target as CSSNode : null;
-            }
-        }
-
-        public bool IsMeasureDefined
-        {
-            get
-            {
-                return _measureFunction != null;
-            }
-        }
-
-        public void CopyStyle(CSSNode srcNode)
-        {
-            Native.CSSNodeCopyStyle(_cssNode, srcNode._cssNode);
-        }
-
-        public CSSDirection StyleDirection
-        {
-            get
-            {
-                return Native.CSSNodeStyleGetDirection(_cssNode);
-            }
-
-            set
-            {
-                Native.CSSNodeStyleSetDirection(_cssNode, value);
-            }
-        }
-
-        public CSSFlexDirection FlexDirection
-        {
-            get
-            {
-                return Native.CSSNodeStyleGetFlexDirection(_cssNode);
-            }
-
-            set
-            {
-                Native.CSSNodeStyleSetFlexDirection(_cssNode, value);
-            }
-        }
-
-        public CSSJustify JustifyContent
-        {
-            get
-            {
-                return Native.CSSNodeStyleGetJustifyContent(_cssNode);
-            }
-
-            set
-            {
-                Native.CSSNodeStyleSetJustifyContent(_cssNode, value);
-            }
-        }
-
-        public CSSAlign AlignItems
-        {
-            get
-            {
-                return Native.CSSNodeStyleGetAlignItems(_cssNode);
-            }
-
-            set
-            {
-                Native.CSSNodeStyleSetAlignItems(_cssNode, value);
-            }
-        }
-
-        public CSSAlign AlignSelf
-        {
-            get
-            {
-                return Native.CSSNodeStyleGetAlignSelf(_cssNode);
-            }
-
-            set
-            {
-                Native.CSSNodeStyleSetAlignSelf(_cssNode, value);
-            }
-        }
-
-        public CSSAlign AlignContent
-        {
-            get
-            {
-                return Native.CSSNodeStyleGetAlignContent(_cssNode);
-            }
-
-            set
-            {
-                Native.CSSNodeStyleSetAlignContent(_cssNode, value);
-            }
-        }
-
-        public CSSPositionType PositionType
-        {
-            get
-            {
-                return Native.CSSNodeStyleGetPositionType(_cssNode);
-            }
-
-            set
-            {
-                Native.CSSNodeStyleSetPositionType(_cssNode, value);
-            }
-        }
-
-        public CSSWrap Wrap
-        {
-            get
-            {
-                return Native.CSSNodeStyleGetFlexWrap(_cssNode);
-            }
-
-            set
-            {
-                Native.CSSNodeStyleSetFlexWrap(_cssNode, value);
-            }
-        }
-
-        public float Flex
-        {
-            set
-            {
-                Native.CSSNodeStyleSetFlex(_cssNode, value);
-            }
-        }
-
-        public float FlexGrow
-        {
-            get
-            {
-                return Native.CSSNodeStyleGetFlexGrow(_cssNode);
-            }
-
-            set
-            {
-                Native.CSSNodeStyleSetFlexGrow(_cssNode, value);
-            }
-        }
-
-        public float FlexShrink
-        {
-            get
-            {
-                return Native.CSSNodeStyleGetFlexShrink(_cssNode);
-            }
-
-            set
-            {
-                Native.CSSNodeStyleSetFlexShrink(_cssNode, value);
-            }
-        }
-
-        public float FlexBasis
-        {
-            get
-            {
-                return Native.CSSNodeStyleGetFlexBasis(_cssNode);
-            }
-
-            set
-            {
-                Native.CSSNodeStyleSetFlexBasis(_cssNode, value);
-            }
-        }
-
-        public float GetMargin(CSSEdge edge)
-        {
-            return Native.CSSNodeStyleGetMargin(_cssNode, edge);
-        }
-
-        public void SetMargin(CSSEdge edge, float value)
-        {
-            Native.CSSNodeStyleSetMargin(_cssNode, edge, value);
-        }
-
-        public float GetPadding(CSSEdge edge)
-        {
-            return Native.CSSNodeStyleGetPadding(_cssNode, edge);
-        }
-
-        public void SetPadding(CSSEdge edge, float padding)
-        {
-            Native.CSSNodeStyleSetPadding(_cssNode, edge, padding);
-        }
-
-        public float GetBorder(CSSEdge edge)
-        {
-            return Native.CSSNodeStyleGetBorder(_cssNode, edge);
-        }
-
-        public void SetBorder(CSSEdge edge, float border)
-        {
-            Native.CSSNodeStyleSetBorder(_cssNode, edge, border);
-        }
-
-        public float GetPosition(CSSEdge edge)
-        {
-            return Native.CSSNodeStyleGetPosition(_cssNode, edge);
-        }
-
-        public void SetPosition(CSSEdge edge, float position)
-        {
-            Native.CSSNodeStyleSetPosition(_cssNode, edge, position);
-        }
-
-        public float StyleWidth
-        {
-            get
-            {
-                return Native.CSSNodeStyleGetWidth(_cssNode);
-            }
-
-            set
-            {
-                Native.CSSNodeStyleSetWidth(_cssNode, value);
-            }
-        }
-
-        public float StyleHeight
-        {
-            get
-            {
-                return Native.CSSNodeStyleGetHeight(_cssNode);
-            }
-
-            set
-            {
-                Native.CSSNodeStyleSetHeight(_cssNode, value);
-            }
-        }
-
-        public float StyleMaxWidth
-        {
-            get
-            {
-                return Native.CSSNodeStyleGetMaxWidth(_cssNode);
-            }
-
-            set
-            {
-                Native.CSSNodeStyleSetMaxWidth(_cssNode, value);
-            }
-        }
-
-        public float StyleMaxHeight
-        {
-            get
-            {
-                return Native.CSSNodeStyleGetMaxHeight(_cssNode);
-            }
-
-            set
-            {
-                Native.CSSNodeStyleSetMaxHeight(_cssNode, value);
-            }
-        }
-
-        public float StyleMinWidth
-        {
-            get
-            {
-                return Native.CSSNodeStyleGetMinWidth(_cssNode);
-            }
-
-            set
-            {
-                Native.CSSNodeStyleSetMinWidth(_cssNode, value);
-            }
-        }
-
-        public float StyleMinHeight
-        {
-            get
-            {
-                return Native.CSSNodeStyleGetMinHeight(_cssNode);
-            }
-
-            set
-            {
-                Native.CSSNodeStyleSetMinHeight(_cssNode, value);
-            }
-        }
-
-        public float StyleAspectRatio
-        {
-            get
-            {
-                return Native.CSSNodeStyleGetAspectRatio(_cssNode);
-            }
-
-            set
-            {
-                Native.CSSNodeStyleSetAspectRatio(_cssNode, value);
-            }
-        }
-
-        public float LayoutX
-        {
-            get
-            {
-                return Native.CSSNodeLayoutGetLeft(_cssNode);
-            }
-        }
-
-        public float LayoutY
-        {
-            get
-            {
-                return Native.CSSNodeLayoutGetTop(_cssNode);
-            }
-        }
-
-        public float LayoutWidth
-        {
-            get
-            {
-                return Native.CSSNodeLayoutGetWidth(_cssNode);
-            }
-        }
-
-        public float LayoutHeight
-        {
-            get
-            {
-                return Native.CSSNodeLayoutGetHeight(_cssNode);
-            }
-        }
-
-        public CSSDirection LayoutDirection
-        {
-            get
-            {
-                return Native.CSSNodeLayoutGetDirection(_cssNode);
-            }
-        }
-
-        public CSSOverflow Overflow
-        {
-            get
-            {
-                return Native.CSSNodeStyleGetOverflow(_cssNode);
-            }
-
-            set
-            {
-                Native.CSSNodeStyleSetOverflow(_cssNode, value);
-            }
-        }
-
-        public object Data
-        {
-            get
-            {
-                return _data;
-            }
-
-            set
-            {
-                _data = value;
-            }
-        }
-
-        public CSSNode this[int index]
-        {
-            get
-            {
-                return _children[index];
-            }
-        }
-
-        public int Count
-        {
-            get
-            {
-                return _children != null ? _children.Count : 0;
-            }
-        }
-
-        public void MarkLayoutSeen()
-        {
-            Native.CSSNodeSetHasNewLayout(_cssNode, false);
-        }
-
-        public bool ValuesEqual(float f1, float f2)
-        {
-            if (float.IsNaN(f1) || float.IsNaN(f2))
-            {
-                return float.IsNaN(f1) && float.IsNaN(f2);
-            }
-
-            return Math.Abs(f2 - f1) < float.Epsilon;
-        }
-
-        public void Insert(int index, CSSNode node)
-        {
-            if (_children == null)
-            {
-                _children = new List<CSSNode>(4);
-            }
-            _children.Insert(index, node);
-            node._parent = new WeakReference(this);
-            Native.CSSNodeInsertChild(_cssNode, node._cssNode, (uint)index);
-        }
-
-        public void RemoveAt(int index)
-        {
-            var child = _children[index];
-            child._parent = null;
-            _children.RemoveAt(index);
-            Native.CSSNodeRemoveChild(_cssNode, child._cssNode);
-        }
-
-        public void Clear()
-        {
-            if (_children != null)
-            {
-                while (_children.Count > 0)
-                {
-                    RemoveAt(_children.Count-1);
-                }
-            }
-        }
-
-        public int IndexOf(CSSNode node)
-        {
-            return _children != null ? _children.IndexOf(node) : -1;
-        }
-
-        public void SetMeasureFunction(MeasureFunction measureFunction)
-        {
-            _measureFunction = measureFunction;
-            _cssMeasureFunc = measureFunction != null ? MeasureInternal : (CSSMeasureFunc)null;
-            Native.CSSNodeSetMeasureFunc(_cssNode, _cssMeasureFunc);
-        }
-
-        public void CalculateLayout()
-        {
-            Native.CSSNodeCalculateLayout(
-                _cssNode,
-                CSSConstants.Undefined,
-                CSSConstants.Undefined,
-                Native.CSSNodeStyleGetDirection(_cssNode));
-        }
-
-        private CSSSize MeasureInternal(
-            IntPtr node,
-            float width,
-            CSSMeasureMode widthMode,
-            float height,
-            CSSMeasureMode heightMode)
-        {
-            if (_measureFunction == null)
-            {
-                throw new InvalidOperationException("Measure function is not defined.");
-            }
-
-            long output = _measureFunction(this, width, widthMode, height, heightMode);
-            return new CSSSize { width = MeasureOutput.GetWidth(output), height = MeasureOutput.GetHeight(output) };
-        }
-
-        public string Print(CSSPrintOptions options =
-            CSSPrintOptions.Layout|CSSPrintOptions.Style|CSSPrintOptions.Children)
-        {
-            StringBuilder sb = new StringBuilder();
-            CSSLogger.Func orig = CSSLogger.Logger;
-            CSSLogger.Logger = (level, message) => {sb.Append(message);};
-            Native.CSSNodePrint(_cssNode, options);
-            CSSLogger.Logger = orig;
-            return sb.ToString();
-        }
-
-        public IEnumerator<CSSNode> GetEnumerator()
-        {
-            return _children != null ? ((IEnumerable<CSSNode>)_children).GetEnumerator() :
-                System.Linq.Enumerable.Empty<CSSNode>().GetEnumerator();
-        }
-
-        IEnumerator IEnumerable.GetEnumerator()
-        {
-            return _children != null ? ((IEnumerable<CSSNode>)_children).GetEnumerator() :
-                System.Linq.Enumerable.Empty<CSSNode>().GetEnumerator();
-        }
-
-        public static int GetInstanceCount()
-        {
-            return Native.CSSNodeGetInstanceCount();
-        }
-
-        public static void SetExperimentalFeatureEnabled(
-            CSSExperimentalFeature feature,
-            bool enabled)
-        {
-            Native.CSSLayoutSetExperimentalFeatureEnabled(feature, enabled);
-        }
-
-        public static bool IsExperimentalFeatureEnabled(CSSExperimentalFeature feature)
-        {
-            return Native.CSSLayoutIsExperimentalFeatureEnabled(feature);
-        }
-    }
-}

csharp/Facebook.CSSLayout/Facebook.CSSLayout.xproj

@@ -1,21 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
-  <PropertyGroup>
-    <VisualStudioVersion Condition="'$(VisualStudioVersion)' == ''">14.0</VisualStudioVersion>
-    <VSToolsPath Condition="'$(VSToolsPath)' == ''">$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)</VSToolsPath>
-  </PropertyGroup>
-
-  <Import Project="$(VSToolsPath)\DotNet\Microsoft.DotNet.Props" Condition="'$(VSToolsPath)' != ''" />
-  <PropertyGroup Label="Globals">
-    <ProjectGuid>75bb7605-e54b-4ede-8f5a-ff1f24464236</ProjectGuid>
-    <RootNamespace>Facebook.CSSLayout</RootNamespace>
-    <BaseIntermediateOutputPath Condition="'$(BaseIntermediateOutputPath)'=='' ">.\obj</BaseIntermediateOutputPath>
-    <OutputPath Condition="'$(OutputPath)'=='' ">.\bin\</OutputPath>
-    <TargetFrameworkVersion>v4.5.2</TargetFrameworkVersion>
-  </PropertyGroup>
-
-  <PropertyGroup>
-    <SchemaVersion>2.0</SchemaVersion>
-  </PropertyGroup>
-  <Import Project="$(VSToolsPath)\DotNet\Microsoft.DotNet.targets" Condition="'$(VSToolsPath)' != ''" />
-</Project>

csharp/Facebook.CSSLayout/MeasureOutput.cs

@@ -1,34 +0,0 @@
-/**
- * Copyright (c) 2014-present, Facebook, Inc.
- * All rights reserved.
- *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
- */
-
-namespace Facebook.CSSLayout
-{
-    public class MeasureOutput
-    {
-        public static long Make(double width, double height)
-        {
-            return Make((int) width, (int) height);
-        }
-
-        public static long Make(int width, int height)
-        {
-            return (long)(((ulong) width) << 32 | ((uint) height));
-        }
-
-        public static int GetWidth(long measureOutput)
-        {
-            return (int) (0xFFFFFFFF & (measureOutput >> 32));
-        }
-
-        public static int GetHeight(long measureOutput)
-        {
-            return (int) (0xFFFFFFFF & measureOutput);
-        }
-    }
-}

csharp/Facebook.CSSLayout/Native.cs

@@ -1,286 +0,0 @@
-/**
- * Copyright (c) 2014-present, Facebook, Inc.
- * All rights reserved.
- *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
- */
-
-using System;
-using System.Runtime.InteropServices;
-
-namespace Facebook.CSSLayout
-{
-    internal static class Native
-    {
-#if UNITY_IOS && !UNITY_EDITOR
-        private const string DllName = "__Internal";
-#else
-        private const string DllName = "CSSLayout";
-#endif
-
-        [DllImport(DllName)]
-        public static extern void CSSInteropSetLogger(
-            [MarshalAs(UnmanagedType.FunctionPtr)] CSSLogger.Func func);
-
-        [DllImport(DllName)]
-        public static extern IntPtr CSSNodeNew();
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeInit(IntPtr cssNode);
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeFree(IntPtr cssNode);
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeReset(IntPtr cssNode);
-
-        [DllImport(DllName)]
-        public static extern int CSSNodeGetInstanceCount();
-
-        [DllImport(DllName)]
-        public static extern void CSSLayoutSetExperimentalFeatureEnabled(
-            CSSExperimentalFeature feature,
-            bool enabled);
-
-        [DllImport(DllName)]
-        public static extern bool CSSLayoutIsExperimentalFeatureEnabled(
-            CSSExperimentalFeature feature);
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeInsertChild(IntPtr node, IntPtr child, uint index);
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeRemoveChild(IntPtr node, IntPtr child);
-
-        [DllImport(DllName)]
-        public static extern IntPtr CSSNodeGetChild(IntPtr node, uint index);
-
-        [DllImport(DllName)]
-        public static extern uint CSSNodeChildCount(IntPtr node);
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeCalculateLayout(IntPtr node,
-                            float availableWidth,
-                            float availableHeight,
-                            CSSDirection parentDirection);
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeMarkDirty(IntPtr node);
-
-        [DllImport(DllName)]
-        [return: MarshalAs(UnmanagedType.I1)]
-        public static extern bool CSSNodeIsDirty(IntPtr node);
-
-        [DllImport(DllName)]
-        public static extern void CSSNodePrint(IntPtr node, CSSPrintOptions options);
-
-        [DllImport(DllName)]
-        [return: MarshalAs(UnmanagedType.I1)]
-        public static extern bool CSSValueIsUndefined(float value);
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeCopyStyle(IntPtr dstNode, IntPtr srcNode);
-
-        #region CSS_NODE_PROPERTY
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeSetContext(IntPtr node, IntPtr context);
-
-        [DllImport(DllName)]
-        public static extern IntPtr CSSNodeGetContext(IntPtr node);
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeSetMeasureFunc(
-            IntPtr node,
-            [MarshalAs(UnmanagedType.FunctionPtr)] CSSMeasureFunc measureFunc);
-
-        [DllImport(DllName)]
-        [return: MarshalAs(UnmanagedType.FunctionPtr)]
-        public static extern CSSMeasureFunc CSSNodeGetMeasureFunc(IntPtr node);
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeSetHasNewLayout(IntPtr node, [MarshalAs(UnmanagedType.I1)] bool hasNewLayout);
-
-        [DllImport(DllName)]
-        [return: MarshalAs(UnmanagedType.I1)]
-        public static extern bool CSSNodeGetHasNewLayout(IntPtr node);
-
-        #endregion
-
-        #region CSS_NODE_STYLE_PROPERTY
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeStyleSetDirection(IntPtr node, CSSDirection direction);
-
-        [DllImport(DllName)]
-        public static extern CSSDirection CSSNodeStyleGetDirection(IntPtr node);
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeStyleSetFlexDirection(IntPtr node, CSSFlexDirection flexDirection);
-
-        [DllImport(DllName)]
-        public static extern CSSFlexDirection CSSNodeStyleGetFlexDirection(IntPtr node);
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeStyleSetJustifyContent(IntPtr node, CSSJustify justifyContent);
-
-        [DllImport(DllName)]
-        public static extern CSSJustify CSSNodeStyleGetJustifyContent(IntPtr node);
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeStyleSetAlignContent(IntPtr node, CSSAlign alignContent);
-
-        [DllImport(DllName)]
-        public static extern CSSAlign CSSNodeStyleGetAlignContent(IntPtr node);
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeStyleSetAlignItems(IntPtr node, CSSAlign alignItems);
-
-        [DllImport(DllName)]
-        public static extern CSSAlign CSSNodeStyleGetAlignItems(IntPtr node);
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeStyleSetAlignSelf(IntPtr node, CSSAlign alignSelf);
-
-        [DllImport(DllName)]
-        public static extern CSSAlign CSSNodeStyleGetAlignSelf(IntPtr node);
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeStyleSetPositionType(IntPtr node, CSSPositionType positionType);
-
-        [DllImport(DllName)]
-        public static extern CSSPositionType CSSNodeStyleGetPositionType(IntPtr node);
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeStyleSetFlexWrap(IntPtr node, CSSWrap flexWrap);
-
-        [DllImport(DllName)]
-        public static extern CSSWrap CSSNodeStyleGetFlexWrap(IntPtr node);
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeStyleSetOverflow(IntPtr node, CSSOverflow flexWrap);
-
-        [DllImport(DllName)]
-        public static extern CSSOverflow CSSNodeStyleGetOverflow(IntPtr node);
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeStyleSetFlex(IntPtr node, float flex);
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeStyleSetFlexGrow(IntPtr node, float flexGrow);
-
-        [DllImport(DllName)]
-        public static extern float CSSNodeStyleGetFlexGrow(IntPtr node);
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeStyleSetFlexShrink(IntPtr node, float flexShrink);
-
-        [DllImport(DllName)]
-        public static extern float CSSNodeStyleGetFlexShrink(IntPtr node);
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeStyleSetFlexBasis(IntPtr node, float flexBasis);
-
-        [DllImport(DllName)]
-        public static extern float CSSNodeStyleGetFlexBasis(IntPtr node);
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeStyleSetWidth(IntPtr node, float width);
-
-        [DllImport(DllName)]
-        public static extern float CSSNodeStyleGetWidth(IntPtr node);
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeStyleSetHeight(IntPtr node, float height);
-
-        [DllImport(DllName)]
-        public static extern float CSSNodeStyleGetHeight(IntPtr node);
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeStyleSetMinWidth(IntPtr node, float minWidth);
-
-        [DllImport(DllName)]
-        public static extern float CSSNodeStyleGetMinWidth(IntPtr node);
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeStyleSetMinHeight(IntPtr node, float minHeight);
-
-        [DllImport(DllName)]
-        public static extern float CSSNodeStyleGetMinHeight(IntPtr node);
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeStyleSetMaxWidth(IntPtr node, float maxWidth);
-
-        [DllImport(DllName)]
-        public static extern float CSSNodeStyleGetMaxWidth(IntPtr node);
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeStyleSetMaxHeight(IntPtr node, float maxHeight);
-
-        [DllImport(DllName)]
-        public static extern float CSSNodeStyleGetMaxHeight(IntPtr node);
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeStyleSetAspectRatio(IntPtr node, float aspectRatio);
-
-        [DllImport(DllName)]
-        public static extern float CSSNodeStyleGetAspectRatio(IntPtr node);
-
-        #endregion
-
-        #region CSS_NODE_STYLE_EDGE_PROPERTY
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeStyleSetPosition(IntPtr node, CSSEdge edge, float position);
-
-        [DllImport(DllName)]
-        public static extern float CSSNodeStyleGetPosition(IntPtr node, CSSEdge edge);
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeStyleSetMargin(IntPtr node, CSSEdge edge, float margin);
-
-        [DllImport(DllName)]
-        public static extern float CSSNodeStyleGetMargin(IntPtr node, CSSEdge edge);
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeStyleSetPadding(IntPtr node, CSSEdge edge, float padding);
-
-        [DllImport(DllName)]
-        public static extern float CSSNodeStyleGetPadding(IntPtr node, CSSEdge edge);
-
-        [DllImport(DllName)]
-        public static extern void CSSNodeStyleSetBorder(IntPtr node, CSSEdge edge, float border);
-
-        [DllImport(DllName)]
-        public static extern float CSSNodeStyleGetBorder(IntPtr node, CSSEdge edge);
-
-        #endregion
-
-        #region CSS_NODE_LAYOUT_PROPERTY
-
-        [DllImport(DllName)]
-        public static extern float CSSNodeLayoutGetLeft(IntPtr node);
-
-        [DllImport(DllName)]
-        public static extern float CSSNodeLayoutGetTop(IntPtr node);
-
-        [DllImport(DllName)]
-        public static extern float CSSNodeLayoutGetRight(IntPtr node);
-
-        [DllImport(DllName)]
-        public static extern float CSSNodeLayoutGetBottom(IntPtr node);
-
-        [DllImport(DllName)]
-        public static extern float CSSNodeLayoutGetWidth(IntPtr node);
-
-        [DllImport(DllName)]
-        public static extern float CSSNodeLayoutGetHeight(IntPtr node);
-
-        [DllImport(DllName)]
-        public static extern CSSDirection CSSNodeLayoutGetDirection(IntPtr node);
-
-        #endregion
-    }
-}

csharp/Facebook.CSSLayout/Properties/AssemblyInfo.cs

@@ -1,32 +0,0 @@
-/**
- * Copyright (c) 2014-present, Facebook, Inc.
- * All rights reserved.
- *
- * This source code is licensed under the BSD-style license found in the
- * LICENSE file in the root directory of this source tree. An additional grant
- * of patent rights can be found in the PATENTS file in the same directory.
- */
-
-using System.Reflection;
-using System.Resources;
-using System.Runtime.InteropServices;
-
-// General Information about an assembly is controlled through the following
-// set of attributes. Change these attribute values to modify the information
-// associated with an assembly.
-[assembly: AssemblyConfiguration("")]
-[assembly: AssemblyCompany("Facebook, Inc.")]
-[assembly: AssemblyProduct("Facebook.CSSLayout")]
-[assembly: AssemblyTrademark("Copyright (c) 2014-present, Facebook, Inc.")]
-
-// Setting ComVisible to false makes the types in this assembly not visible
-// to COM components.  If you need to access a type in this assembly from
-// COM, set the ComVisible attribute to true on that type.
-[assembly: ComVisible(false)]
-
-// The following GUID is for the ID of the typelib if this project is exposed to COM
-[assembly: Guid("75bb7605-e54b-4ede-8f5a-ff1f24464236")]
-
-[assembly: NeutralResourcesLanguage("en")]
-
-[assembly: AssemblyVersion("3.0.0.0")]

csharp/Facebook.Yoga/BaselineFunction.cs

@@ -0,0 +1,13 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+namespace Facebook.Yoga
+{
+    public delegate float BaselineFunction(YogaNode node, float width, float height);
+}

csharp/Facebook.Yoga/Border.cs

@@ -7,16 +7,17 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  */
 
-namespace Facebook.CSSLayout
+namespace Facebook.Yoga
 {
-    public class Spacing
+    [System.Obsolete]
+    public class Border
     {
         public float? Top;
         public float? Bottom;
         public float? Left;
         public float? Right;
 
-        public Spacing(
+        public Border(
             float? top = null,
             float? bottom = null,
             float? left = null,

csharp/Facebook.Yoga/Facebook.Yoga.Shared.projitems

@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <MSBuildAllProjects>$(MSBuildAllProjects);$(MSBuildThisFileFullPath)</MSBuildAllProjects>
+    <HasSharedItems>true</HasSharedItems>
+    <SharedGUID>91c42d32-291d-4b72-90b4-551663d60b8b</SharedGUID>
+  </PropertyGroup>
+  <PropertyGroup Label="Configuration">
+    <Import_RootNamespace>Facebook.Yoga.Shared</Import_RootNamespace>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="$(MSBuildThisFileDirectory)BaselineFunction.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Border.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)MeasureFunction.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)MeasureOutput.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Native.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Spacing.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)YogaAlign.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)YogaBaselineFunc.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)YogaConstants.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)YogaDimension.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)YogaDirection.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)YogaEdge.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)YogaExperimentalFeature.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)YogaFlexDirection.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)YogaJustify.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)YogaLogger.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)YogaLogLevel.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)YogaMeasureFunc.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)YogaMeasureMode.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)YogaNode.Create.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)YogaNode.Spacing.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)YogaNode.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)YogaOverflow.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)YogaPositionType.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)YogaPrintOptions.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)YogaSize.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)YogaUnit.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)YogaValue.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)YogaValueExtensions.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)YogaWrap.cs" />
+  </ItemGroup>
+</Project>

csharp/Facebook.Yoga/Facebook.Yoga.Shared.shproj

@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="14.0" DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup Label="Globals">
+    <ProjectGuid>91c42d32-291d-4b72-90b4-551663d60b8b</ProjectGuid>
+    <MinimumVisualStudioVersion>14.0</MinimumVisualStudioVersion>
+  </PropertyGroup>
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)\CodeSharing\Microsoft.CodeSharing.Common.Default.props" />
+  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)\CodeSharing\Microsoft.CodeSharing.Common.props" />
+  <PropertyGroup />
+  <Import Project="Facebook.Yoga.Shared.projitems" Label="Shared" />
+  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)\CodeSharing\Microsoft.CodeSharing.CSharp.targets" />
+</Project>

csharp/Facebook.Yoga/MeasureFunction.cs

@@ -7,12 +7,12 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  */
 
-namespace Facebook.CSSLayout
+namespace Facebook.Yoga
 {
-    public delegate long MeasureFunction(
-        CSSNode node,
+    public delegate YogaSize MeasureFunction(
+        YogaNode node,
         float width,
-        CSSMeasureMode widthMode,
+        YogaMeasureMode widthMode,
         float height,
-        CSSMeasureMode heightMode);
+        YogaMeasureMode heightMode);
 }

csharp/Facebook.Yoga/MeasureOutput.cs

@@ -0,0 +1,19 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+namespace Facebook.Yoga
+{
+    public class MeasureOutput
+    {
+        public static YogaSize Make(float width, float height)
+        {
+            return new YogaSize { width = width, height = height};
+        }
+    }
+}

csharp/Facebook.Yoga/Native.cs

@@ -0,0 +1,326 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+using System;
+using System.Runtime.InteropServices;
+
+namespace Facebook.Yoga
+{
+    internal static class Native
+    {
+#if (UNITY_IOS && !UNITY_EDITOR) || __IOS__
+        private const string DllName = "__Internal";
+#else
+        private const string DllName = "yoga";
+#endif
+
+        internal class YGNodeHandle : SafeHandle
+        {
+            private YGNodeHandle() : base(IntPtr.Zero, true)
+            {
+            }
+
+            public override bool IsInvalid
+            {
+                get
+                {
+                    return this.handle == IntPtr.Zero;
+                }
+            }
+
+            protected override bool ReleaseHandle()
+            {
+                Native.YGNodeFree(this.handle);
+                GC.KeepAlive(this);
+                return true;
+            }
+        }
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGInteropSetLogger(
+            [MarshalAs(UnmanagedType.FunctionPtr)] YogaLogger.Func func);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern YGNodeHandle YGNodeNew();
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeFree(IntPtr node);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeReset(YGNodeHandle node);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern int YGNodeGetInstanceCount();
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGSetExperimentalFeatureEnabled(
+            YogaExperimentalFeature feature,
+            bool enabled);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern bool YGIsExperimentalFeatureEnabled(
+            YogaExperimentalFeature feature);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeInsertChild(YGNodeHandle node, YGNodeHandle child, uint index);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeRemoveChild(YGNodeHandle node, YGNodeHandle child);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeCalculateLayout(YGNodeHandle node,
+                            float availableWidth,
+                            float availableHeight,
+                            YogaDirection parentDirection);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeMarkDirty(YGNodeHandle node);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        [return: MarshalAs(UnmanagedType.I1)]
+        public static extern bool YGNodeIsDirty(YGNodeHandle node);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodePrint(YGNodeHandle node, YogaPrintOptions options);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeCopyStyle(YGNodeHandle dstNode, YGNodeHandle srcNode);
+
+        #region YG_NODE_PROPERTY
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeSetMeasureFunc(
+            YGNodeHandle node,
+            [MarshalAs(UnmanagedType.FunctionPtr)] YogaMeasureFunc measureFunc);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeSetBaselineFunc(
+            YGNodeHandle node,
+            [MarshalAs(UnmanagedType.FunctionPtr)] YogaBaselineFunc baselineFunc);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeSetHasNewLayout(YGNodeHandle node, [MarshalAs(UnmanagedType.I1)] bool hasNewLayout);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        [return: MarshalAs(UnmanagedType.I1)]
+        public static extern bool YGNodeGetHasNewLayout(YGNodeHandle node);
+
+        #endregion
+
+        #region YG_NODE_STYLE_PROPERTY
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetDirection(YGNodeHandle node, YogaDirection direction);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern YogaDirection YGNodeStyleGetDirection(YGNodeHandle node);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetFlexDirection(YGNodeHandle node, YogaFlexDirection flexDirection);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern YogaFlexDirection YGNodeStyleGetFlexDirection(YGNodeHandle node);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetJustifyContent(YGNodeHandle node, YogaJustify justifyContent);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern YogaJustify YGNodeStyleGetJustifyContent(YGNodeHandle node);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetAlignContent(YGNodeHandle node, YogaAlign alignContent);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern YogaAlign YGNodeStyleGetAlignContent(YGNodeHandle node);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetAlignItems(YGNodeHandle node, YogaAlign alignItems);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern YogaAlign YGNodeStyleGetAlignItems(YGNodeHandle node);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetAlignSelf(YGNodeHandle node, YogaAlign alignSelf);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern YogaAlign YGNodeStyleGetAlignSelf(YGNodeHandle node);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetPositionType(YGNodeHandle node, YogaPositionType positionType);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern YogaPositionType YGNodeStyleGetPositionType(YGNodeHandle node);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetFlexWrap(YGNodeHandle node, YogaWrap flexWrap);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern YogaWrap YGNodeStyleGetFlexWrap(YGNodeHandle node);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetOverflow(YGNodeHandle node, YogaOverflow flexWrap);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern YogaOverflow YGNodeStyleGetOverflow(YGNodeHandle node);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetFlex(YGNodeHandle node, float flex);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetFlexGrow(YGNodeHandle node, float flexGrow);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern float YGNodeStyleGetFlexGrow(YGNodeHandle node);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetFlexShrink(YGNodeHandle node, float flexShrink);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern float YGNodeStyleGetFlexShrink(YGNodeHandle node);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetFlexBasis(YGNodeHandle node, float flexBasis);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetFlexBasisPercent(YGNodeHandle node, float flexBasis);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern YogaValue YGNodeStyleGetFlexBasis(YGNodeHandle node);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetWidth(YGNodeHandle node, float width);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetWidthPercent(YGNodeHandle node, float width);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern YogaValue YGNodeStyleGetWidth(YGNodeHandle node);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetHeight(YGNodeHandle node, float height);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetHeightPercent(YGNodeHandle node, float height);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern YogaValue YGNodeStyleGetHeight(YGNodeHandle node);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetMinWidth(YGNodeHandle node, float minWidth);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetMinWidthPercent(YGNodeHandle node, float minWidth);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern YogaValue YGNodeStyleGetMinWidth(YGNodeHandle node);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetMinHeight(YGNodeHandle node, float minHeight);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetMinHeightPercent(YGNodeHandle node, float minHeight);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern YogaValue YGNodeStyleGetMinHeight(YGNodeHandle node);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetMaxWidth(YGNodeHandle node, float maxWidth);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetMaxWidthPercent(YGNodeHandle node, float maxWidth);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern YogaValue YGNodeStyleGetMaxWidth(YGNodeHandle node);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetMaxHeight(YGNodeHandle node, float maxHeight);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetMaxHeightPercent(YGNodeHandle node, float maxHeight);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern YogaValue YGNodeStyleGetMaxHeight(YGNodeHandle node);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetAspectRatio(YGNodeHandle node, float aspectRatio);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern float YGNodeStyleGetAspectRatio(YGNodeHandle node);
+
+        #endregion
+
+        #region YG_NODE_STYLE_EDGE_PROPERTY
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetPosition(YGNodeHandle node, YogaEdge edge, float position);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetPositionPercent(YGNodeHandle node, YogaEdge edge, float position);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern YogaValue YGNodeStyleGetPosition(YGNodeHandle node, YogaEdge edge);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetMargin(YGNodeHandle node, YogaEdge edge, float margin);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetMarginPercent(YGNodeHandle node, YogaEdge edge, float margin);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern YogaValue YGNodeStyleGetMargin(YGNodeHandle node, YogaEdge edge);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetPadding(YGNodeHandle node, YogaEdge edge, float padding);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetPaddingPercent(YGNodeHandle node, YogaEdge edge, float padding);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern YogaValue YGNodeStyleGetPadding(YGNodeHandle node, YogaEdge edge);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern void YGNodeStyleSetBorder(YGNodeHandle node, YogaEdge edge, float border);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern float YGNodeStyleGetBorder(YGNodeHandle node, YogaEdge edge);
+
+        #endregion
+
+        #region YG_NODE_LAYOUT_PROPERTY
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern float YGNodeLayoutGetLeft(YGNodeHandle node);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern float YGNodeLayoutGetTop(YGNodeHandle node);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern float YGNodeLayoutGetRight(YGNodeHandle node);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern float YGNodeLayoutGetBottom(YGNodeHandle node);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern float YGNodeLayoutGetWidth(YGNodeHandle node);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern float YGNodeLayoutGetHeight(YGNodeHandle node);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern float YGNodeLayoutGetMargin(YGNodeHandle node, YogaEdge edge);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern float YGNodeLayoutGetPadding(YGNodeHandle node, YogaEdge edge);
+
+        [DllImport(DllName, ExactSpelling = true, CallingConvention = CallingConvention.Cdecl)]
+        public static extern YogaDirection YGNodeLayoutGetDirection(YGNodeHandle node);
+
+        #endregion
+    }
+}

csharp/Facebook.Yoga/Spacing.cs

@@ -0,0 +1,32 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+namespace Facebook.Yoga
+{
+    [System.Obsolete]
+    public class Spacing
+    {
+        public YogaValue? Top;
+        public YogaValue? Bottom;
+        public YogaValue? Left;
+        public YogaValue? Right;
+
+        public Spacing(
+            YogaValue? top = null,
+            YogaValue? bottom = null,
+            YogaValue? left = null,
+            YogaValue? right = null)
+        {
+            Top = top;
+            Bottom = bottom;
+            Left = left;
+            Right = right;
+        }
+    }
+}

csharp/Facebook.Yoga/YogaAlign.cs

@@ -7,14 +7,15 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  */
 
-namespace Facebook.CSSLayout
+namespace Facebook.Yoga
 {
-    public enum CSSAlign
+    public enum YogaAlign
     {
         Auto,
         FlexStart,
         Center,
         FlexEnd,
         Stretch,
+        Baseline,
     }
 }

csharp/Facebook.Yoga/YogaBaselineFunc.cs

@@ -0,0 +1,17 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+using System;
+using System.Runtime.InteropServices;
+
+namespace Facebook.Yoga
+{
+    [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
+    public delegate float YogaBaselineFunc(IntPtr node, float width, float height);
+}

csharp/Facebook.Yoga/YogaConstants.cs

@@ -7,9 +7,9 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  */
 
-namespace Facebook.CSSLayout
+namespace Facebook.Yoga
 {
-    public static class CSSConstants
+    public static class YogaConstants
     {
         public const float Undefined = float.NaN;
 
@@ -17,5 +17,10 @@ namespace Facebook.CSSLayout
         {
             return float.IsNaN(value);
         }
+
+        public static bool IsUndefined(YogaValue value)
+        {
+            return value.Unit == YogaUnit.Undefined;
+        }
     }
 }

csharp/Facebook.Yoga/YogaDimension.cs

@@ -7,9 +7,9 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  */
 
-namespace Facebook.CSSLayout
+namespace Facebook.Yoga
 {
-    public enum CSSDimension
+    public enum YogaDimension
     {
         Width,
         Height,

csharp/Facebook.Yoga/YogaDirection.cs

@@ -0,0 +1,18 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+namespace Facebook.Yoga
+{
+    public enum YogaDirection
+    {
+        Inherit,
+        LTR,
+        RTL,
+    }
+}

csharp/Facebook.Yoga/YogaEdge.cs

@@ -7,9 +7,9 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  */
 
-namespace Facebook.CSSLayout
+namespace Facebook.Yoga
 {
-    public enum CSSEdge
+    public enum YogaEdge
     {
         Left,
         Top,

csharp/Facebook.Yoga/YogaExperimentalFeature.cs

@@ -7,9 +7,9 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  */
 
-namespace Facebook.CSSLayout
+namespace Facebook.Yoga
 {
-    public enum CSSExperimentalFeature
+    public enum YogaExperimentalFeature
     {
         Rounding,
         WebFlexBasis,

csharp/Facebook.Yoga/YogaFlexDirection.cs

@@ -7,9 +7,9 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  */
 
-namespace Facebook.CSSLayout
+namespace Facebook.Yoga
 {
-    public enum CSSFlexDirection
+    public enum YogaFlexDirection
     {
         Column,
         ColumnReverse,

csharp/Facebook.Yoga/YogaJustify.cs

@@ -7,9 +7,9 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  */
 
-namespace Facebook.CSSLayout
+namespace Facebook.Yoga
 {
-    public enum CSSJustify
+    public enum YogaJustify
     {
         FlexStart,
         Center,

csharp/Facebook.Yoga/YogaLogLevel.cs

@@ -7,9 +7,9 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  */
 
-namespace Facebook.CSSLayout
+namespace Facebook.Yoga
 {
-    public enum CSSLogLevel
+    public enum YogaLogLevel
     {
         Error,
         Warn,

csharp/Facebook.Yoga/YogaLogger.cs

@@ -10,12 +10,12 @@
 using System;
 using System.Runtime.InteropServices;
 
-namespace Facebook.CSSLayout
+namespace Facebook.Yoga
 {
-    internal static class CSSLogger
+    internal static class YogaLogger
     {
         [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
-        public delegate void Func(CSSLogLevel level, string message);
+        public delegate void Func(YogaLogLevel level, string message);
 
         private static bool _initialized;
         private static Func _managedLogger = null;
@@ -32,12 +32,12 @@ namespace Facebook.CSSLayout
                         Logger(level, message);
                     }
 
-                    if (level == CSSLogLevel.Error)
+                    if (level == YogaLogLevel.Error)
                     {
                         throw new InvalidOperationException(message);
                     }
                 };
-                Native.CSSInteropSetLogger(_managedLogger);
+                Native.YGInteropSetLogger(_managedLogger);
                 _initialized = true;
             }
         }

csharp/Facebook.Yoga/YogaMeasureFunc.cs

@@ -10,13 +10,13 @@
 using System;
 using System.Runtime.InteropServices;
 
-namespace Facebook.CSSLayout
+namespace Facebook.Yoga
 {
     [UnmanagedFunctionPointer(CallingConvention.Cdecl)]
-    public delegate CSSSize CSSMeasureFunc(
-        IntPtr node, 
+    public delegate YogaSize YogaMeasureFunc(
+        IntPtr node,
         float width,
-        CSSMeasureMode widthMode,
+        YogaMeasureMode widthMode,
         float height,
-        CSSMeasureMode heightMode);
+        YogaMeasureMode heightMode);
 }

csharp/Facebook.Yoga/YogaMeasureMode.cs

@@ -7,9 +7,9 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  */
 
-namespace Facebook.CSSLayout
+namespace Facebook.Yoga
 {
-    public enum CSSMeasureMode
+    public enum YogaMeasureMode
     {
         Undefined,
         Exactly,

csharp/Facebook.Yoga/YogaNode.Create.cs

@@ -9,36 +9,37 @@
 
 using System;
 
-namespace Facebook.CSSLayout
+namespace Facebook.Yoga
 {
-    public partial class CSSNode
+    public partial class YogaNode
     {
-        public static CSSNode Create(
-            CSSDirection? styleDirection = null,
-            CSSFlexDirection? flexDirection = null,
-            CSSJustify? justifyContent = null,
-            CSSAlign? alignContent = null,
-            CSSAlign? alignItems = null,
-            CSSAlign? alignSelf = null,
-            CSSPositionType? positionType = null,
-            CSSWrap? wrap = null,
-            CSSOverflow? overflow = null,
+        [Obsolete("use Object Initializer")]
+        public static YogaNode Create(
+            YogaDirection? styleDirection = null,
+            YogaFlexDirection? flexDirection = null,
+            YogaJustify? justifyContent = null,
+            YogaAlign? alignContent = null,
+            YogaAlign? alignItems = null,
+            YogaAlign? alignSelf = null,
+            YogaPositionType? positionType = null,
+            YogaWrap? wrap = null,
+            YogaOverflow? overflow = null,
             float? flex = null,
             float? flexGrow = null,
             float? flexShrink = null,
-            float? flexBasis = null,
+            YogaValue? flexBasis = null,
             Spacing position = null,
             Spacing margin = null,
             Spacing padding = null,
-            Spacing border = null,
-            float? styleWidth = null,
-            float? styleHeight = null,
-            float? styleMaxWidth = null,
-            float? styleMaxHeight = null,
-            float? styleMinWidth = null,
-            float? styleMinHeight = null)
+            Border border = null,
+            YogaValue? width = null,
+            YogaValue? height = null,
+            YogaValue? maxWidth = null,
+            YogaValue? maxHeight = null,
+            YogaValue? minWidth = null,
+            YogaValue? minHeight = null)
         {
-            CSSNode node = new CSSNode();
+            YogaNode node = new YogaNode();
 
             if (styleDirection.HasValue)
             {
@@ -109,22 +110,22 @@ namespace Facebook.CSSLayout
             {
                 if (position.Top.HasValue)
                 {
-                    node.SetPosition(CSSEdge.Top, position.Top.Value);
+                    node.Top = position.Top.Value;
                 }
 
                 if (position.Bottom.HasValue)
                 {
-                    node.SetPosition(CSSEdge.Bottom, position.Bottom.Value);
+                    node.Bottom = position.Bottom.Value;
                 }
 
                 if (position.Left.HasValue)
                 {
-                    node.SetPosition(CSSEdge.Left, position.Left.Value);
+                    node.Left = position.Left.Value;
                 }
 
                 if (position.Right.HasValue)
                 {
-                    node.SetPosition(CSSEdge.Right, position.Right.Value);
+                    node.Right = position.Right.Value;
                 }
             }
 
@@ -132,22 +133,22 @@ namespace Facebook.CSSLayout
             {
                 if (margin.Top.HasValue)
                 {
-                    node.SetMargin(CSSEdge.Top, margin.Top.Value);
+                    node.MarginTop = margin.Top.Value;
                 }
 
                 if (margin.Bottom.HasValue)
                 {
-                    node.SetMargin(CSSEdge.Bottom, margin.Bottom.Value);
+                    node.MarginBottom = margin.Bottom.Value;
                 }
 
                 if (margin.Left.HasValue)
                 {
-                    node.SetMargin(CSSEdge.Left, margin.Left.Value);
+                    node.MarginLeft = margin.Left.Value;
                 }
 
                 if (margin.Right.HasValue)
                 {
-                    node.SetMargin(CSSEdge.Right, margin.Right.Value);
+                    node.MarginRight = margin.Right.Value;
                 }
             }
 
@@ -155,22 +156,22 @@ namespace Facebook.CSSLayout
             {
                 if (padding.Top.HasValue)
                 {
-                    node.SetPadding(CSSEdge.Top, padding.Top.Value);
+                    node.PaddingTop = padding.Top.Value;
                 }
 
                 if (padding.Bottom.HasValue)
                 {
-                    node.SetPadding(CSSEdge.Bottom, padding.Bottom.Value);
+                    node.PaddingBottom = padding.Bottom.Value;
                 }
 
                 if (padding.Left.HasValue)
                 {
-                    node.SetPadding(CSSEdge.Left, padding.Left.Value);
+                    node.PaddingLeft = padding.Left.Value;
                 }
 
                 if (padding.Right.HasValue)
                 {
-                    node.SetPadding(CSSEdge.Right, padding.Right.Value);
+                    node.PaddingRight = padding.Right.Value;
                 }
             }
 
@@ -178,57 +179,56 @@ namespace Facebook.CSSLayout
             {
                 if (border.Top.HasValue)
                 {
-                    node.SetBorder(CSSEdge.Top, border.Top.Value);
+                    node.BorderTopWidth = border.Top.Value;
                 }
 
                 if (border.Bottom.HasValue)
                 {
-                    node.SetBorder(CSSEdge.Bottom, border.Bottom.Value);
+                    node.BorderBottomWidth = border.Bottom.Value;
                 }
 
                 if (border.Left.HasValue)
                 {
-                    node.SetBorder(CSSEdge.Left, border.Left.Value);
+                    node.BorderLeftWidth = border.Left.Value;
                 }
 
                 if (border.Right.HasValue)
                 {
-                    node.SetBorder(CSSEdge.Right, border.Right.Value);
+                    node.BorderRightWidth = border.Right.Value;
                 }
             }
 
-            if (styleWidth.HasValue)
+            if (width.HasValue)
             {
-                node.StyleWidth = styleWidth.Value;
+                node.Width = width.Value;
             }
 
-            if (styleHeight.HasValue)
+            if (height.HasValue)
             {
-                node.StyleHeight = styleHeight.Value;
+                node.Height = height.Value;
             }
 
-            if (styleMinWidth.HasValue)
+            if (minWidth.HasValue)
             {
-                node.StyleMinWidth = styleMinWidth.Value;
+                node.MinWidth = minWidth.Value;
             }
 
-            if (styleMinHeight.HasValue)
+            if (minHeight.HasValue)
             {
-                node.StyleMinHeight = styleMinHeight.Value;
+                node.MinHeight = minHeight.Value;
             }
 
-            if (styleMaxWidth.HasValue)
+            if (maxWidth.HasValue)
             {
-                node.StyleMaxWidth = styleMaxWidth.Value;
+                node.MaxWidth = maxWidth.Value;
             }
 
-            if (styleMaxHeight.HasValue)
+            if (maxHeight.HasValue)
             {
-                node.StyleMaxHeight = styleMaxHeight.Value;
+                node.MaxHeight = maxHeight.Value;
             }
 
             return node;
         }
     }
 }
-

csharp/Facebook.Yoga/YogaNode.Spacing.cs

@@ -0,0 +1,551 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+using System;
+
+namespace Facebook.Yoga
+{
+    public partial class YogaNode
+    {
+        public YogaValue Left
+        {
+            get
+            {
+                return Native.YGNodeStyleGetPosition(_ygNode, YogaEdge.Left);
+            }
+
+            set
+            {
+                SetStylePosition(YogaEdge.Left, value);
+            }
+        }
+
+        public YogaValue Top
+        {
+            get
+            {
+                return Native.YGNodeStyleGetPosition(_ygNode, YogaEdge.Top);
+            }
+
+            set
+            {
+                SetStylePosition(YogaEdge.Top, value);
+            }
+        }
+
+        public YogaValue Right
+        {
+            get
+            {
+                return Native.YGNodeStyleGetPosition(_ygNode, YogaEdge.Right);
+            }
+
+            set
+            {
+                SetStylePosition(YogaEdge.Right, value);
+            }
+        }
+
+        public YogaValue Bottom
+        {
+            get
+            {
+                return Native.YGNodeStyleGetPosition(_ygNode, YogaEdge.Bottom);
+            }
+
+            set
+            {
+                SetStylePosition(YogaEdge.Bottom, value);
+            }
+        }
+
+        public YogaValue Start
+        {
+            get
+            {
+                return Native.YGNodeStyleGetPosition(_ygNode, YogaEdge.Start);
+            }
+
+            set
+            {
+                SetStylePosition(YogaEdge.Start, value);
+            }
+        }
+
+        public YogaValue End
+        {
+            get
+            {
+                return Native.YGNodeStyleGetPosition(_ygNode, YogaEdge.End);
+            }
+
+            set
+            {
+                SetStylePosition(YogaEdge.End, value);
+            }
+        }
+
+        private void SetStylePosition(YogaEdge edge, YogaValue value)
+        {
+            if (value.Unit == YogaUnit.Percent)
+            {
+                Native.YGNodeStyleSetPositionPercent(_ygNode, edge, value.Value);
+            }
+            else
+            {
+                Native.YGNodeStyleSetPosition(_ygNode, edge, value.Value);
+            }
+        }
+
+        public YogaValue MarginLeft
+        {
+            get
+            {
+                return Native.YGNodeStyleGetMargin(_ygNode, YogaEdge.Left);
+            }
+
+            set
+            {
+                SetStyleMargin(YogaEdge.Left, value);
+            }
+        }
+
+        public YogaValue MarginTop
+        {
+            get
+            {
+                return Native.YGNodeStyleGetMargin(_ygNode, YogaEdge.Top);
+            }
+
+            set
+            {
+                SetStyleMargin(YogaEdge.Top, value);
+            }
+        }
+
+        public YogaValue MarginRight
+        {
+            get
+            {
+                return Native.YGNodeStyleGetMargin(_ygNode, YogaEdge.Right);
+            }
+
+            set
+            {
+                SetStyleMargin(YogaEdge.Right, value);
+            }
+        }
+
+        public YogaValue MarginBottom
+        {
+            get
+            {
+                return Native.YGNodeStyleGetMargin(_ygNode, YogaEdge.Bottom);
+            }
+
+            set
+            {
+                SetStyleMargin(YogaEdge.Bottom, value);
+            }
+        }
+
+        public YogaValue MarginStart
+        {
+            get
+            {
+                return Native.YGNodeStyleGetMargin(_ygNode, YogaEdge.Start);
+            }
+
+            set
+            {
+                SetStyleMargin(YogaEdge.Start, value);
+            }
+        }
+
+        public YogaValue MarginEnd
+        {
+            get
+            {
+                return Native.YGNodeStyleGetMargin(_ygNode, YogaEdge.End);
+            }
+
+            set
+            {
+                SetStyleMargin(YogaEdge.End, value);
+            }
+        }
+
+        public YogaValue MarginHorizontal
+        {
+            get
+            {
+                return Native.YGNodeStyleGetMargin(_ygNode, YogaEdge.Horizontal);
+            }
+
+            set
+            {
+                SetStyleMargin(YogaEdge.Horizontal, value);
+            }
+        }
+
+        public YogaValue MarginVertical
+        {
+            get
+            {
+                return Native.YGNodeStyleGetMargin(_ygNode, YogaEdge.Vertical);
+            }
+
+            set
+            {
+                SetStyleMargin(YogaEdge.Vertical, value);
+            }
+        }
+
+        public YogaValue Margin
+        {
+            get
+            {
+                return Native.YGNodeStyleGetMargin(_ygNode, YogaEdge.All);
+            }
+
+            set
+            {
+                SetStyleMargin(YogaEdge.All, value);
+            }
+        }
+
+        private void SetStyleMargin(YogaEdge edge, YogaValue value)
+        {
+            if (value.Unit == YogaUnit.Percent)
+            {
+                Native.YGNodeStyleSetMarginPercent(_ygNode, edge, value.Value);
+            }
+            else
+            {
+                Native.YGNodeStyleSetMargin(_ygNode, edge, value.Value);
+            }
+        }
+
+        public YogaValue PaddingLeft
+        {
+            get
+            {
+                return Native.YGNodeStyleGetPadding(_ygNode, YogaEdge.Left);
+            }
+
+            set
+            {
+                SetStylePadding(YogaEdge.Left, value);
+            }
+        }
+
+        public YogaValue PaddingTop
+        {
+            get
+            {
+                return Native.YGNodeStyleGetPadding(_ygNode, YogaEdge.Top);
+            }
+
+            set
+            {
+                SetStylePadding(YogaEdge.Top, value);
+            }
+        }
+
+        public YogaValue PaddingRight
+        {
+            get
+            {
+                return Native.YGNodeStyleGetPadding(_ygNode, YogaEdge.Right);
+            }
+
+            set
+            {
+                SetStylePadding(YogaEdge.Right, value);
+            }
+        }
+
+        public YogaValue PaddingBottom
+        {
+            get
+            {
+                return Native.YGNodeStyleGetPadding(_ygNode, YogaEdge.Bottom);
+            }
+
+            set
+            {
+                SetStylePadding(YogaEdge.Bottom, value);
+            }
+        }
+
+        public YogaValue PaddingStart
+        {
+            get
+            {
+                return Native.YGNodeStyleGetPadding(_ygNode, YogaEdge.Start);
+            }
+
+            set
+            {
+                SetStylePadding(YogaEdge.Start, value);
+            }
+        }
+
+        public YogaValue PaddingEnd
+        {
+            get
+            {
+                return Native.YGNodeStyleGetPadding(_ygNode, YogaEdge.End);
+            }
+
+            set
+            {
+                SetStylePadding(YogaEdge.End, value);
+            }
+        }
+
+        public YogaValue PaddingHorizontal
+        {
+            get
+            {
+                return Native.YGNodeStyleGetPadding(_ygNode, YogaEdge.Horizontal);
+            }
+
+            set
+            {
+                SetStylePadding(YogaEdge.Horizontal, value);
+            }
+        }
+
+        public YogaValue PaddingVertical
+        {
+            get
+            {
+                return Native.YGNodeStyleGetPadding(_ygNode, YogaEdge.Vertical);
+            }
+
+            set
+            {
+                SetStylePadding(YogaEdge.Vertical, value);
+            }
+        }
+
+        public YogaValue Padding
+        {
+            get
+            {
+                return Native.YGNodeStyleGetPadding(_ygNode, YogaEdge.All);
+            }
+
+            set
+            {
+                SetStylePadding(YogaEdge.All, value);
+            }
+        }
+
+        private void SetStylePadding(YogaEdge edge, YogaValue value)
+        {
+            if (value.Unit == YogaUnit.Percent)
+            {
+                Native.YGNodeStyleSetPaddingPercent(_ygNode, edge, value.Value);
+            }
+            else
+            {
+                Native.YGNodeStyleSetPadding(_ygNode, edge, value.Value);
+            }
+        }
+
+        public float BorderLeftWidth
+        {
+            get
+            {
+                return Native.YGNodeStyleGetBorder(_ygNode, YogaEdge.Left);
+            }
+
+            set
+            {
+                Native.YGNodeStyleSetBorder(_ygNode, YogaEdge.Left, value);
+            }
+        }
+
+        public float BorderTopWidth
+        {
+            get
+            {
+                return Native.YGNodeStyleGetBorder(_ygNode, YogaEdge.Top);
+            }
+
+            set
+            {
+                Native.YGNodeStyleSetBorder(_ygNode, YogaEdge.Top, value);
+            }
+        }
+
+        public float BorderRightWidth
+        {
+            get
+            {
+                return Native.YGNodeStyleGetBorder(_ygNode, YogaEdge.Right);
+            }
+
+            set
+            {
+                Native.YGNodeStyleSetBorder(_ygNode, YogaEdge.Right, value);
+            }
+        }
+
+        public float BorderBottomWidth
+        {
+            get
+            {
+                return Native.YGNodeStyleGetBorder(_ygNode, YogaEdge.Bottom);
+            }
+
+            set
+            {
+                Native.YGNodeStyleSetBorder(_ygNode, YogaEdge.Bottom, value);
+            }
+        }
+
+        public float BorderStartWidth
+        {
+            get
+            {
+                return Native.YGNodeStyleGetBorder(_ygNode, YogaEdge.Start);
+            }
+
+            set
+            {
+                Native.YGNodeStyleSetBorder(_ygNode, YogaEdge.Start, value);
+            }
+        }
+
+        public float BorderEndWidth
+        {
+            get
+            {
+                return Native.YGNodeStyleGetBorder(_ygNode, YogaEdge.End);
+            }
+
+            set
+            {
+                Native.YGNodeStyleSetBorder(_ygNode, YogaEdge.End, value);
+            }
+        }
+
+        public float BorderWidth
+        {
+            get
+            {
+                return Native.YGNodeStyleGetBorder(_ygNode, YogaEdge.All);
+            }
+
+            set
+            {
+                Native.YGNodeStyleSetBorder(_ygNode, YogaEdge.All, value);
+            }
+        }
+
+        public float LayoutMarginLeft
+        {
+            get
+            {
+                return Native.YGNodeLayoutGetMargin(_ygNode, YogaEdge.Left);
+            }
+        }
+
+        public float LayoutMarginTop
+        {
+            get
+            {
+                return Native.YGNodeLayoutGetMargin(_ygNode, YogaEdge.Top);
+            }
+        }
+
+        public float LayoutMarginRight
+        {
+            get
+            {
+                return Native.YGNodeLayoutGetMargin(_ygNode, YogaEdge.Right);
+            }
+        }
+
+        public float LayoutMarginBottom
+        {
+            get
+            {
+                return Native.YGNodeLayoutGetMargin(_ygNode, YogaEdge.Bottom);
+            }
+        }
+
+        public float LayoutMarginStart
+        {
+            get
+            {
+                return Native.YGNodeLayoutGetMargin(_ygNode, YogaEdge.Start);
+            }
+        }
+
+        public float LayoutMarginEnd
+        {
+            get
+            {
+                return Native.YGNodeLayoutGetMargin(_ygNode, YogaEdge.End);
+            }
+        }
+
+        public float LayoutPaddingLeft
+        {
+            get
+            {
+                return Native.YGNodeLayoutGetPadding(_ygNode, YogaEdge.Left);
+            }
+        }
+
+        public float LayoutPaddingTop
+        {
+            get
+            {
+                return Native.YGNodeLayoutGetPadding(_ygNode, YogaEdge.Top);
+            }
+        }
+
+        public float LayoutPaddingRight
+        {
+            get
+            {
+                return Native.YGNodeLayoutGetPadding(_ygNode, YogaEdge.Right);
+            }
+        }
+
+        public float LayoutPaddingBottom
+        {
+            get
+            {
+                return Native.YGNodeLayoutGetPadding(_ygNode, YogaEdge.Bottom);
+            }
+        }
+
+        public float LayoutPaddingStart
+        {
+            get
+            {
+                return Native.YGNodeLayoutGetPadding(_ygNode, YogaEdge.Start);
+            }
+        }
+
+        public float LayoutPaddingEnd
+        {
+            get
+            {
+                return Native.YGNodeLayoutGetPadding(_ygNode, YogaEdge.End);
+            }
+        }
+    }
+}

csharp/Facebook.Yoga/YogaNode.cs

@@ -0,0 +1,695 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Text;
+
+namespace Facebook.Yoga
+{
+    public partial class YogaNode : IEnumerable<YogaNode>
+    {
+        private Native.YGNodeHandle _ygNode;
+        private WeakReference _parent;
+        private List<YogaNode> _children;
+        private MeasureFunction _measureFunction;
+        private YogaMeasureFunc _ygMeasureFunc;
+        private BaselineFunction _baselineFunction;
+        private YogaBaselineFunc _ygBaselineFunc;
+        private object _data;
+
+        public YogaNode()
+        {
+            YogaLogger.Initialize();
+
+            _ygNode = Native.YGNodeNew();
+            if (_ygNode.IsInvalid)
+            {
+                throw new InvalidOperationException("Failed to allocate native memory");
+            }
+        }
+
+        public YogaNode(YogaNode srcNode)
+            : this()
+        {
+            CopyStyle(srcNode);
+        }
+
+        public void Reset()
+        {
+            _measureFunction = null;
+            _baselineFunction = null;
+            _data = null;
+
+            Native.YGNodeReset(_ygNode);
+        }
+
+        public bool IsDirty
+        {
+            get
+            {
+                return Native.YGNodeIsDirty(_ygNode);
+            }
+        }
+
+        public virtual void MarkDirty()
+        {
+            Native.YGNodeMarkDirty(_ygNode);
+        }
+
+        public bool HasNewLayout
+        {
+            get
+            {
+                return Native.YGNodeGetHasNewLayout(_ygNode);
+            }
+        }
+
+        public void MarkHasNewLayout()
+        {
+            Native.YGNodeSetHasNewLayout(_ygNode, true);
+        }
+
+        public YogaNode Parent
+        {
+            get
+            {
+                return _parent != null ? _parent.Target as YogaNode : null;
+            }
+        }
+
+        public bool IsMeasureDefined
+        {
+            get
+            {
+                return _measureFunction != null;
+            }
+        }
+
+        public bool IsBaselineDefined
+        {
+            get
+            {
+                return _baselineFunction != null;
+            }
+        }
+
+        public void CopyStyle(YogaNode srcNode)
+        {
+            Native.YGNodeCopyStyle(_ygNode, srcNode._ygNode);
+        }
+
+        public YogaDirection StyleDirection
+        {
+            get
+            {
+                return Native.YGNodeStyleGetDirection(_ygNode);
+            }
+
+            set
+            {
+                Native.YGNodeStyleSetDirection(_ygNode, value);
+            }
+        }
+
+        public YogaFlexDirection FlexDirection
+        {
+            get
+            {
+                return Native.YGNodeStyleGetFlexDirection(_ygNode);
+            }
+
+            set
+            {
+                Native.YGNodeStyleSetFlexDirection(_ygNode, value);
+            }
+        }
+
+        public YogaJustify JustifyContent
+        {
+            get
+            {
+                return Native.YGNodeStyleGetJustifyContent(_ygNode);
+            }
+
+            set
+            {
+                Native.YGNodeStyleSetJustifyContent(_ygNode, value);
+            }
+        }
+
+        public YogaAlign AlignItems
+        {
+            get
+            {
+                return Native.YGNodeStyleGetAlignItems(_ygNode);
+            }
+
+            set
+            {
+                Native.YGNodeStyleSetAlignItems(_ygNode, value);
+            }
+        }
+
+        public YogaAlign AlignSelf
+        {
+            get
+            {
+                return Native.YGNodeStyleGetAlignSelf(_ygNode);
+            }
+
+            set
+            {
+                Native.YGNodeStyleSetAlignSelf(_ygNode, value);
+            }
+        }
+
+        public YogaAlign AlignContent
+        {
+            get
+            {
+                return Native.YGNodeStyleGetAlignContent(_ygNode);
+            }
+
+            set
+            {
+                Native.YGNodeStyleSetAlignContent(_ygNode, value);
+            }
+        }
+
+        public YogaPositionType PositionType
+        {
+            get
+            {
+                return Native.YGNodeStyleGetPositionType(_ygNode);
+            }
+
+            set
+            {
+                Native.YGNodeStyleSetPositionType(_ygNode, value);
+            }
+        }
+
+        public YogaWrap Wrap
+        {
+            get
+            {
+                return Native.YGNodeStyleGetFlexWrap(_ygNode);
+            }
+
+            set
+            {
+                Native.YGNodeStyleSetFlexWrap(_ygNode, value);
+            }
+        }
+
+        public float Flex
+        {
+            set
+            {
+                Native.YGNodeStyleSetFlex(_ygNode, value);
+            }
+        }
+
+        public float FlexGrow
+        {
+            get
+            {
+                return Native.YGNodeStyleGetFlexGrow(_ygNode);
+            }
+
+            set
+            {
+                Native.YGNodeStyleSetFlexGrow(_ygNode, value);
+            }
+        }
+
+        public float FlexShrink
+        {
+            get
+            {
+                return Native.YGNodeStyleGetFlexShrink(_ygNode);
+            }
+
+            set
+            {
+                Native.YGNodeStyleSetFlexShrink(_ygNode, value);
+            }
+        }
+
+        public YogaValue FlexBasis
+        {
+            get
+            {
+                return Native.YGNodeStyleGetFlexBasis(_ygNode);
+            }
+
+            set
+            {
+                if (value.Unit == YogaUnit.Percent)
+                {
+                    Native.YGNodeStyleSetFlexBasisPercent(_ygNode, value.Value);
+                }
+                else
+                {
+                    Native.YGNodeStyleSetFlexBasis(_ygNode, value.Value);
+                }
+            }
+        }
+
+        [Obsolete("use Margin properties")]
+        public YogaValue GetMargin(YogaEdge edge)
+        {
+            return Native.YGNodeStyleGetMargin(_ygNode, edge);
+        }
+
+        [Obsolete("use Margin properties")]
+        public void SetMargin(YogaEdge edge, YogaValue value)
+        {
+            if (value.Unit == YogaUnit.Percent)
+            {
+                Native.YGNodeStyleSetMarginPercent(_ygNode, edge, value.Value);
+            }
+            else
+            {
+                Native.YGNodeStyleSetMargin(_ygNode, edge, value.Value);
+            }
+        }
+
+        [Obsolete("use Padding properties")]
+        public YogaValue GetPadding(YogaEdge edge)
+        {
+            return Native.YGNodeStyleGetPadding(_ygNode, edge);
+        }
+
+        [Obsolete("use Padding properties")]
+        public void SetPadding(YogaEdge edge, YogaValue value)
+        {
+            if (value.Unit == YogaUnit.Percent)
+            {
+                Native.YGNodeStyleSetPaddingPercent(_ygNode, edge, value.Value);
+            }
+            else
+            {
+                Native.YGNodeStyleSetPadding(_ygNode, edge, value.Value);
+            }
+        }
+
+        [Obsolete("use BorderWidth properties")]
+        public float GetBorder(YogaEdge edge)
+        {
+            return Native.YGNodeStyleGetBorder(_ygNode, edge);
+        }
+
+        [Obsolete("use BorderWidth properties")]
+        public void SetBorder(YogaEdge edge, float border)
+        {
+            Native.YGNodeStyleSetBorder(_ygNode, edge, border);
+        }
+
+        [Obsolete("use Position properties")]
+        public YogaValue GetPosition(YogaEdge edge)
+        {
+            return Native.YGNodeStyleGetPosition(_ygNode, edge);
+        }
+
+        [Obsolete("use Position properties")]
+        public void SetPosition(YogaEdge edge, YogaValue value)
+        {
+            if (value.Unit == YogaUnit.Percent)
+            {
+                Native.YGNodeStyleSetPositionPercent(_ygNode, edge, value.Value);
+            }
+            else
+            {
+                Native.YGNodeStyleSetPosition(_ygNode, edge, value.Value);
+            }
+        }
+
+        [Obsolete("use LayoutPadding properties")]
+        public float GetLayoutPadding(YogaEdge edge)
+        {
+            return Native.YGNodeLayoutGetPadding(_ygNode, edge);
+        }
+
+        public YogaValue Width
+        {
+            get
+            {
+                return Native.YGNodeStyleGetWidth(_ygNode);
+            }
+
+            set
+            {
+                if (value.Unit == YogaUnit.Percent)
+                {
+                    Native.YGNodeStyleSetWidthPercent(_ygNode, value.Value);
+                }
+                else
+                {
+                    Native.YGNodeStyleSetWidth(_ygNode, value.Value);
+                }
+            }
+        }
+
+        public YogaValue Height
+        {
+            get
+            {
+                return Native.YGNodeStyleGetHeight(_ygNode);
+            }
+
+            set
+            {
+                if (value.Unit == YogaUnit.Percent)
+                {
+                    Native.YGNodeStyleSetHeightPercent(_ygNode, value.Value);
+                }
+                else
+                {
+                    Native.YGNodeStyleSetHeight(_ygNode, value.Value);
+                }
+            }
+        }
+
+        public YogaValue MaxWidth
+        {
+            get
+            {
+                return Native.YGNodeStyleGetMaxWidth(_ygNode);
+            }
+
+            set
+            {
+                if (value.Unit == YogaUnit.Percent)
+                {
+                    Native.YGNodeStyleSetMaxWidthPercent(_ygNode, value.Value);
+                }
+                else
+                {
+                    Native.YGNodeStyleSetMaxWidth(_ygNode, value.Value);
+                }
+            }
+        }
+
+        public YogaValue MaxHeight
+        {
+            get
+            {
+                return Native.YGNodeStyleGetMaxHeight(_ygNode);
+            }
+
+            set
+            {
+                if (value.Unit == YogaUnit.Percent)
+                {
+                    Native.YGNodeStyleSetMaxHeightPercent(_ygNode, value.Value);
+                }
+                else
+                {
+                    Native.YGNodeStyleSetMaxHeight(_ygNode, value.Value);
+                }
+            }
+        }
+
+        public YogaValue MinWidth
+        {
+            get
+            {
+                return Native.YGNodeStyleGetMinWidth(_ygNode);
+            }
+
+            set
+            {
+                if (value.Unit == YogaUnit.Percent)
+                {
+                    Native.YGNodeStyleSetMinWidthPercent(_ygNode, value.Value);
+                }
+                else
+                {
+                    Native.YGNodeStyleSetMinWidth(_ygNode, value.Value);
+                }
+            }
+        }
+
+        public YogaValue MinHeight
+        {
+            get
+            {
+                return Native.YGNodeStyleGetMinHeight(_ygNode);
+            }
+
+            set
+            {
+                if (value.Unit == YogaUnit.Percent)
+                {
+                    Native.YGNodeStyleSetMinHeightPercent(_ygNode, value.Value);
+                }
+                else
+                {
+                    Native.YGNodeStyleSetMinHeight(_ygNode, value.Value);
+                }
+            }
+        }
+
+        public float StyleAspectRatio
+        {
+            get
+            {
+                return Native.YGNodeStyleGetAspectRatio(_ygNode);
+            }
+
+            set
+            {
+                Native.YGNodeStyleSetAspectRatio(_ygNode, value);
+            }
+        }
+
+        public float LayoutX
+        {
+            get
+            {
+                return Native.YGNodeLayoutGetLeft(_ygNode);
+            }
+        }
+
+        public float LayoutY
+        {
+            get
+            {
+                return Native.YGNodeLayoutGetTop(_ygNode);
+            }
+        }
+
+        public float LayoutWidth
+        {
+            get
+            {
+                return Native.YGNodeLayoutGetWidth(_ygNode);
+            }
+        }
+
+        public float LayoutHeight
+        {
+            get
+            {
+                return Native.YGNodeLayoutGetHeight(_ygNode);
+            }
+        }
+
+        public YogaDirection LayoutDirection
+        {
+            get
+            {
+                return Native.YGNodeLayoutGetDirection(_ygNode);
+            }
+        }
+
+        public YogaOverflow Overflow
+        {
+            get
+            {
+                return Native.YGNodeStyleGetOverflow(_ygNode);
+            }
+
+            set
+            {
+                Native.YGNodeStyleSetOverflow(_ygNode, value);
+            }
+        }
+
+        public object Data
+        {
+            get
+            {
+                return _data;
+            }
+
+            set
+            {
+                _data = value;
+            }
+        }
+
+        public YogaNode this[int index]
+        {
+            get
+            {
+                return _children[index];
+            }
+        }
+
+        public int Count
+        {
+            get
+            {
+                return _children != null ? _children.Count : 0;
+            }
+        }
+
+        public void MarkLayoutSeen()
+        {
+            Native.YGNodeSetHasNewLayout(_ygNode, false);
+        }
+
+        public bool ValuesEqual(float f1, float f2)
+        {
+            if (float.IsNaN(f1) || float.IsNaN(f2))
+            {
+                return float.IsNaN(f1) && float.IsNaN(f2);
+            }
+
+            return Math.Abs(f2 - f1) < float.Epsilon;
+        }
+
+        public void Insert(int index, YogaNode node)
+        {
+            if (_children == null)
+            {
+                _children = new List<YogaNode>(4);
+            }
+            _children.Insert(index, node);
+            node._parent = new WeakReference(this);
+            Native.YGNodeInsertChild(_ygNode, node._ygNode, (uint)index);
+        }
+
+        public void RemoveAt(int index)
+        {
+            var child = _children[index];
+            child._parent = null;
+            _children.RemoveAt(index);
+            Native.YGNodeRemoveChild(_ygNode, child._ygNode);
+        }
+
+        public void Clear()
+        {
+            if (_children != null)
+            {
+                while (_children.Count > 0)
+                {
+                    RemoveAt(_children.Count-1);
+                }
+            }
+        }
+
+        public int IndexOf(YogaNode node)
+        {
+            return _children != null ? _children.IndexOf(node) : -1;
+        }
+
+        public void SetMeasureFunction(MeasureFunction measureFunction)
+        {
+            _measureFunction = measureFunction;
+            _ygMeasureFunc = measureFunction != null ? MeasureInternal : (YogaMeasureFunc)null;
+            Native.YGNodeSetMeasureFunc(_ygNode, _ygMeasureFunc);
+        }
+
+        public void SetBaselineFunction(BaselineFunction baselineFunction)
+        {
+            _baselineFunction = baselineFunction;
+            _ygBaselineFunc = baselineFunction != null ? BaselineInternal : (YogaBaselineFunc)null;
+            Native.YGNodeSetBaselineFunc(_ygNode, _ygBaselineFunc);
+        }
+
+        public void CalculateLayout()
+        {
+            Native.YGNodeCalculateLayout(
+                _ygNode,
+                YogaConstants.Undefined,
+                YogaConstants.Undefined,
+                Native.YGNodeStyleGetDirection(_ygNode));
+        }
+
+        private YogaSize MeasureInternal(
+            IntPtr node,
+            float width,
+            YogaMeasureMode widthMode,
+            float height,
+            YogaMeasureMode heightMode)
+        {
+            if (_measureFunction == null)
+            {
+                throw new InvalidOperationException("Measure function is not defined.");
+            }
+
+            return _measureFunction(this, width, widthMode, height, heightMode);
+        }
+
+        private float BaselineInternal(IntPtr node, float width, float height)
+        {
+            if (_baselineFunction == null)
+            {
+                throw new InvalidOperationException("Baseline function is not defined.");
+            }
+
+            return _baselineFunction(this, width, height);
+        }
+
+        public string Print(YogaPrintOptions options =
+            YogaPrintOptions.Layout|YogaPrintOptions.Style|YogaPrintOptions.Children)
+        {
+            StringBuilder sb = new StringBuilder();
+            YogaLogger.Func orig = YogaLogger.Logger;
+            YogaLogger.Logger = (level, message) => {sb.Append(message);};
+            Native.YGNodePrint(_ygNode, options);
+            YogaLogger.Logger = orig;
+            return sb.ToString();
+        }
+
+        public IEnumerator<YogaNode> GetEnumerator()
+        {
+            return _children != null ? ((IEnumerable<YogaNode>)_children).GetEnumerator() :
+                System.Linq.Enumerable.Empty<YogaNode>().GetEnumerator();
+        }
+
+        IEnumerator IEnumerable.GetEnumerator()
+        {
+            return _children != null ? ((IEnumerable<YogaNode>)_children).GetEnumerator() :
+                System.Linq.Enumerable.Empty<YogaNode>().GetEnumerator();
+        }
+
+        public static int GetInstanceCount()
+        {
+            return Native.YGNodeGetInstanceCount();
+        }
+
+        public static void SetExperimentalFeatureEnabled(
+            YogaExperimentalFeature feature,
+            bool enabled)
+        {
+            Native.YGSetExperimentalFeatureEnabled(feature, enabled);
+        }
+
+        public static bool IsExperimentalFeatureEnabled(YogaExperimentalFeature feature)
+        {
+            return Native.YGIsExperimentalFeatureEnabled(feature);
+        }
+    }
+}

csharp/Facebook.Yoga/YogaOverflow.cs

@@ -7,9 +7,9 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  */
 
-namespace Facebook.CSSLayout
+namespace Facebook.Yoga
 {
-    public enum CSSOverflow
+    public enum YogaOverflow
     {
         Visible,
         Hidden,

csharp/Facebook.Yoga/YogaPositionType.cs

@@ -7,9 +7,9 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  */
 
-namespace Facebook.CSSLayout
+namespace Facebook.Yoga
 {
-    public enum CSSPositionType
+    public enum YogaPositionType
     {
         Relative,
         Absolute,

csharp/Facebook.Yoga/YogaPrintOptions.cs

@@ -7,9 +7,9 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  */
 
-namespace Facebook.CSSLayout
+namespace Facebook.Yoga
 {
-    public enum CSSPrintOptions
+    public enum YogaPrintOptions
     {
         Layout = 1,
         Style = 2,

csharp/Facebook.Yoga/YogaSize.cs

@@ -9,10 +9,10 @@
 
 using System.Runtime.InteropServices;
 
-namespace Facebook.CSSLayout
+namespace Facebook.Yoga
 {
     [StructLayout(LayoutKind.Sequential)]
-    public struct CSSSize
+    public struct YogaSize
     {
         public float width;
         public float height;

csharp/Facebook.Yoga/YogaUnit.cs

@@ -0,0 +1,18 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+namespace Facebook.Yoga
+{
+    public enum YogaUnit
+    {
+        Undefined,
+        Pixel,
+        Percent,
+    }
+}

csharp/Facebook.Yoga/YogaValue.cs

@@ -0,0 +1,87 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+using System.Runtime.InteropServices;
+
+namespace Facebook.Yoga
+{
+    [StructLayout(LayoutKind.Sequential)]
+    public struct YogaValue
+    {
+        private float value;
+        private YogaUnit unit;
+
+        public YogaUnit Unit
+        {
+            get
+            {
+                return unit;
+            }
+        }
+
+        public float Value
+        {
+            get
+            {
+                return value;
+            }
+        }
+
+        public static YogaValue Pixel(float value)
+        {
+            return new YogaValue
+            {
+                value = value,
+                unit = YogaConstants.IsUndefined(value) ? YogaUnit.Undefined : YogaUnit.Pixel
+            };
+        }
+
+        public bool Equals(YogaValue other)
+        {
+            return Unit == other.Unit && (Value.Equals(other.Value) || Unit == YogaUnit.Undefined);
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (ReferenceEquals(null, obj)) return false;
+            return obj is YogaValue && Equals((YogaValue) obj);
+        }
+
+        public override int GetHashCode()
+        {
+            unchecked
+            {
+                return (Value.GetHashCode() * 397) ^ (int) Unit;
+            }
+        }
+
+        public static YogaValue Undefined()
+        {
+            return new YogaValue
+            {
+                value = YogaConstants.Undefined,
+                unit = YogaUnit.Undefined
+            };
+        }
+
+        public static YogaValue Percent(float value)
+        {
+            return new YogaValue
+            {
+                value = value,
+                unit = YogaConstants.IsUndefined(value) ? YogaUnit.Undefined : YogaUnit.Percent
+            };
+        }
+
+        public static implicit operator YogaValue(float pixelValue)
+        {
+            return Pixel(pixelValue);
+        }
+    }
+}

csharp/Facebook.Yoga/YogaValueExtensions.cs

@@ -0,0 +1,34 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+namespace Facebook.Yoga
+{
+    public static class YogaValueExtensions
+    {
+        public static YogaValue Percent(this float value)
+        {
+            return YogaValue.Percent(value);
+        }
+
+        public static YogaValue Px(this float value)
+        {
+            return YogaValue.Pixel(value);
+        }
+
+        public static YogaValue Percent(this int value)
+        {
+            return YogaValue.Percent(value);
+        }
+
+        public static YogaValue Px(this int value)
+        {
+            return YogaValue.Pixel(value);
+        }
+    }
+}

csharp/Facebook.Yoga/YogaWrap.cs

@@ -7,9 +7,9 @@
  * of patent rights can be found in the PATENTS file in the same directory.
  */
 
-namespace Facebook.CSSLayout
+namespace Facebook.Yoga
 {
-    public enum CSSWrap
+    public enum YogaWrap
     {
         NoWrap,
         Wrap,

csharp/Facebook.Yoga/project.json

@@ -3,7 +3,8 @@
   "version": "3.0.0-*",
 
   "dependencies": {
-    "NETStandard.Library": "1.6.0"
+    "NETStandard.Library": "1.6.0",
+    "System.Runtime.Handles": "4.3.0"
   },
 
   "frameworks": {

csharp/Facebook.YogaKit/Facebook.YogaKit.Shared.shproj

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <ProjectGuid>{A24B3BA6-3143-4FFF-B8B8-1EDF166F5F4A}</ProjectGuid>
+  </PropertyGroup>
+  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
+  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)\CodeSharing\Microsoft.CodeSharing.Common.Default.props" />
+  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)\CodeSharing\Microsoft.CodeSharing.Common.props" />
+  <Import Project="Facebook.YogaKit.projitems" Label="Shared" />
+  <Import Project="$(MSBuildExtensionsPath32)\Microsoft\VisualStudio\v$(VisualStudioVersion)\CodeSharing\Microsoft.CodeSharing.CSharp.targets" />
+</Project>

csharp/Facebook.YogaKit/Facebook.YogaKit.projitems

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <MSBuildAllProjects>$(MSBuildAllProjects);$(MSBuildThisFileFullPath)</MSBuildAllProjects>
+    <HasSharedItems>true</HasSharedItems>
+    <SharedGUID>{A24B3BA6-3143-4FFF-B8B8-1EDF166F5F4A}</SharedGUID>
+  </PropertyGroup>
+  <PropertyGroup Label="Configuration">
+    <Import_RootNamespace>Facebook.YogaKit</Import_RootNamespace>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="$(MSBuildThisFileDirectory)YogaLayout.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)IYogaLayout.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)YogaKit.cs" />
+  </ItemGroup>
+</Project>

csharp/Facebook.YogaKit/IYogaLayout.cs

@@ -0,0 +1,85 @@
+using System;
+using System.Drawing;
+using Facebook.Yoga;
+
+namespace Facebook.YogaKit
+{
+	public interface IYogaLayout : IDisposable
+	{
+		bool IsEnabled { get; set; }
+		bool IsIncludeInLayout { get; set; }
+
+		//YogaDirection Direction { get; set; }
+		YogaFlexDirection FlexDirection { get; set; }
+		YogaJustify JustifyContent { get; set; }
+		YogaAlign AlignContent { get; set; }
+		YogaAlign AlignSelf { get; set; }
+		YogaAlign AlignItems { get; set; }
+		YogaPositionType Position { get; set; }
+		YogaWrap FlexWrap { get; set; }
+		YogaOverflow Overflow { get; set; }
+
+
+		float FlexGrow { get; set; }
+		float FlexShrink { get; set; }
+		float FlexBasis { get; set; }
+
+		float Left { get; set; }
+		float Top { get; set; }
+		float Right { get; set; }
+		float Bottom { get; set; }
+		float Start { get; set; }
+		float End { get; set; }
+
+		float MarginLeft { get; set; }
+		float MarginTop { get; set; }
+		float MarginRight { get; set; }
+		float MarginBottom { get; set; }
+		float MarginStart { get; set; }
+		float MarginEnd { get; set; }
+		float MarginHorizontal { get; set; }
+		float MarginVertical { get; set; }
+		float Margin { get; set; }
+
+		float PaddingLeft { get; set; }
+		float PaddingTop { get; set; }
+		float PaddingRight { get; set; }
+		float PaddingBottom { get; set; }
+		float PaddingStart { get; set; }
+		float PaddingEnd { get; set; }
+		float PaddingHorizontal { get; set; }
+		float PaddingVertical { get; set; }
+		float Padding { get; set; }
+
+		float BorderLeftWidth { get; set; }
+		float BorderTopWidth { get; set; }
+		float BorderRightWidth { get; set; }
+		float BorderBottomWidth { get; set; }
+		float BorderStartWidth { get; set; }
+		float BorderEndWidth { get; set; }
+		float BorderWidth { get; set; }
+
+		float Width { get; set; }
+		float Height { get; set; }
+		float MinWidth { get; set; }
+		float MinHeight { get; set; }
+		float MaxWidth { get; set; }
+		float MaxHeight { get; set; }
+
+		// Yoga specific properties, not compatible with flexbox specification
+
+		// Returns the size of the view if no constraints were given. This could equivalent to calling [self sizeThatFits:CGSizeMake(CGFLOAT_MAX, CGFLOAT_MAX)];
+		SizeF IntrinsicSize { get; }
+		float AspectRatio { get; set; }
+		// Get the resolved direction of this node. This won't be YGDirectionInherit
+		YogaDirection ResolvedDirection { get; }
+		// Returns the number of children that are using Flexbox.
+		int NumberOfChildren { get; }
+		// Return a BOOL indiciating whether or not we this node contains any subviews that are included in Yoga's layout.
+		bool IsLeaf { get; }
+		// Perform a layout calculation and update the frames of the views in the hierarchy with the results
+		void ApplyLayout();
+		// Mark that a view's layout needs to be recalculated. Only works for leaf views.
+		void MarkDirty();
+	}
+}

csharp/Facebook.YogaKit/YogaKit.cs

@@ -0,0 +1,10 @@
+using System.Collections.Generic;
+using Facebook.Yoga;
+
+namespace Facebook.YogaKit
+{
+	public static partial class YogaKit
+	{
+		internal static Dictionary<YogaNode, object> Bridges = new Dictionary<YogaNode, object>();
+	}
+}

csharp/Facebook.YogaKit/YogaLayout.cs

@@ -0,0 +1,888 @@
+using System;
+using Facebook.Yoga;
+using System.Collections.Generic;
+using System.Drawing;
+#if __IOS__
+using NativeView = UIKit.UIView;
+#endif
+
+namespace Facebook.YogaKit
+{
+	public partial class YogaLayout : IYogaLayout
+	{
+		WeakReference<NativeView> _viewRef;
+		YogaNode _node;
+
+		internal YogaLayout(NativeView view)
+		{
+			_viewRef = new WeakReference<NativeView>(view);
+			_node = new YogaNode();
+			YogaKit.Bridges.Add(_node, view);
+
+			IsEnabled = false;
+			IsIncludeInLayout = true;
+		}
+
+		public new void MarkDirty()
+		{
+			if (IsLeaf)
+				_node.MarkDirty();
+		}
+
+		public bool IsLeaf
+		{
+			get
+			{
+				if (IsEnabled)
+				{
+					NativeView view = null;
+					if (_viewRef.TryGetTarget(out view))
+					{
+						foreach (NativeView subview in GetChildren(view))
+						{
+							var layout = subview.Yoga();
+							if (layout.IsEnabled && layout.IsIncludeInLayout)
+							{
+								return false;
+							}
+						}
+					}
+
+				}
+				return true;
+			}
+		}
+
+
+
+		public bool IsEnabled
+		{
+			get;
+			set;
+		}
+
+		public bool IsIncludeInLayout
+		{
+			get;
+			set;
+		}
+
+		public int NumberOfChildren => _node.Count;
+
+		public YogaDirection ResolvedDirection => _node.LayoutDirection;
+
+		public YogaFlexDirection FlexDirection
+		{
+			get
+			{
+				return _node.FlexDirection;
+			}
+
+			set
+			{
+				_node.FlexDirection = value;
+			}
+		}
+
+		public YogaAlign AlignItems
+		{
+			get
+			{
+				return _node.AlignItems;
+			}
+
+			set
+			{
+				_node.AlignItems = value;
+			}
+		}
+
+		public YogaJustify JustifyContent
+		{
+			get
+			{
+				return _node.JustifyContent;
+			}
+
+			set
+			{
+				_node.JustifyContent = value;
+			}
+		}
+
+		public YogaAlign AlignContent
+		{
+			get
+			{
+				return _node.AlignContent;
+			}
+
+			set
+			{
+				_node.AlignContent = value;
+			}
+		}
+
+		public YogaAlign AlignSelf
+		{
+			get
+			{
+				return _node.AlignSelf;
+			}
+
+			set
+			{
+				_node.AlignSelf = value;
+			}
+		}
+
+		public YogaPositionType Position
+		{
+			get
+			{
+				return _node.PositionType;
+			}
+
+			set
+			{
+				_node.PositionType = value;
+			}
+		}
+
+		public YogaWrap FlexWrap
+		{
+			get
+			{
+				return _node.Wrap;
+			}
+
+			set
+			{
+				_node.Wrap = value;
+			}
+		}
+
+		public YogaOverflow Overflow
+		{
+			get
+			{
+				return _node.Overflow;
+			}
+
+			set
+			{
+				_node.Overflow = value;
+			}
+		}
+
+		public float FlexGrow
+		{
+			get
+			{
+				return _node.FlexGrow;
+			}
+
+			set
+			{
+				_node.FlexGrow = value;
+			}
+		}
+
+		public float FlexShrink
+		{
+			get
+			{
+				return _node.FlexShrink;
+			}
+
+			set
+			{
+				_node.FlexShrink = value;
+			}
+		}
+
+		public float FlexBasis
+		{
+			get
+			{
+				return (float)_node.FlexBasis.Value;
+			}
+
+			set
+			{
+				_node.FlexBasis = value;
+			}
+		}
+
+		public float Left
+		{
+			get
+			{
+				return _node.Left.Value;
+			}
+
+			set
+			{
+				_node.Left = value;
+			}
+		}
+
+		public float Top
+		{
+			get
+			{
+				return _node.Top.Value;
+			}
+
+			set
+			{
+				_node.Top = value;
+			}
+		}
+
+		public float Right
+		{
+			get
+			{
+				return _node.Right.Value;
+			}
+
+			set
+			{
+				_node.Right = value;
+			}
+		}
+
+		public float Bottom
+		{
+			get
+			{
+				return _node.Bottom.Value;
+			}
+
+			set
+			{
+				_node.Bottom = value;
+			}
+		}
+
+		public float Start
+		{
+			get
+			{
+				return _node.Start.Value;
+			}
+
+			set
+			{
+				_node.Start = value;
+			}
+		}
+
+		public float End
+		{
+			get
+			{
+				return _node.End.Value;
+			}
+
+			set
+			{
+				_node.End = value;
+			}
+		}
+
+		public float MarginLeft
+		{
+			get
+			{
+				return _node.MarginLeft.Value;
+			}
+
+			set
+			{
+				_node.MarginLeft = value;
+			}
+		}
+
+		public float MarginTop
+		{
+			get
+			{
+				return _node.MarginTop.Value;
+			}
+
+			set
+			{
+				_node.MarginTop = value;
+			}
+		}
+
+		public float MarginRight
+		{
+			get
+			{
+				return _node.MarginRight.Value;
+			}
+
+			set
+			{
+				_node.MarginRight = value;
+			}
+		}
+
+		public float MarginBottom
+		{
+			get
+			{
+				return _node.MarginBottom.Value;
+			}
+
+			set
+			{
+				_node.MarginBottom = value;
+			}
+		}
+
+		public float MarginStart
+		{
+			get
+			{
+				return _node.MarginStart.Value;
+			}
+
+			set
+			{
+				_node.MarginStart = value;
+			}
+		}
+
+		public float MarginEnd
+		{
+			get
+			{
+				return _node.MarginEnd.Value;
+			}
+
+			set
+			{
+				_node.MarginEnd = value;
+			}
+		}
+
+		public float MarginHorizontal
+		{
+			get
+			{
+				return _node.MarginHorizontal.Value;
+			}
+
+			set
+			{
+				_node.MarginHorizontal = value;
+			}
+		}
+
+		public float MarginVertical
+		{
+			get
+			{
+				return _node.MarginVertical.Value;
+			}
+
+			set
+			{
+				_node.MarginVertical = value;
+			}
+		}
+
+		public float Margin
+		{
+			get
+			{
+				return _node.Margin.Value;
+			}
+
+			set
+			{
+				_node.Margin = value;
+			}
+		}
+
+		public float PaddingLeft
+		{
+			get
+			{
+				return _node.PaddingLeft.Value;
+			}
+
+			set
+			{
+				_node.PaddingLeft = value;
+			}
+		}
+
+		public float PaddingTop
+		{
+			get
+			{
+				return _node.PaddingTop.Value;
+			}
+
+			set
+			{
+				_node.PaddingTop = value;
+			}
+		}
+
+		public float PaddingRight
+		{
+			get
+			{
+				return _node.PaddingRight.Value;
+			}
+
+			set
+			{
+				_node.PaddingRight = value;
+			}
+		}
+
+		public float PaddingBottom
+		{
+			get
+			{
+				return _node.PaddingBottom.Value;
+			}
+
+			set
+			{
+				_node.PaddingBottom = value;
+			}
+		}
+
+		public float PaddingStart
+		{
+			get
+			{
+				return _node.PaddingStart.Value;
+			}
+
+			set
+			{
+				_node.PaddingStart = value;
+			}
+		}
+
+		public float PaddingEnd
+		{
+			get
+			{
+				return _node.PaddingEnd.Value;
+			}
+
+			set
+			{
+				_node.PaddingEnd = value;
+			}
+		}
+
+		public float PaddingHorizontal
+		{
+			get
+			{
+				return _node.PaddingHorizontal.Value;
+			}
+
+			set
+			{
+				_node.PaddingHorizontal = value;
+			}
+		}
+
+		public float PaddingVertical
+		{
+			get
+			{
+				return _node.PaddingVertical.Value;
+			}
+
+			set
+			{
+				_node.PaddingHorizontal = value;
+			}
+		}
+
+		public float Padding
+		{
+			get
+			{
+				return _node.Padding.Value;
+			}
+
+			set
+			{
+				_node.Padding = value;
+			}
+		}
+
+		public float BorderLeftWidth
+		{
+			get
+			{
+				return _node.BorderLeftWidth;
+			}
+
+			set
+			{
+				_node.BorderLeftWidth = value;
+			}
+		}
+
+		public float BorderTopWidth
+		{
+			get
+			{
+				return _node.BorderTopWidth;
+			}
+
+			set
+			{
+				_node.BorderTopWidth = value;
+			}
+		}
+
+		public float BorderRightWidth
+		{
+			get
+			{
+				return _node.BorderRightWidth;
+			}
+
+			set
+			{
+				_node.BorderRightWidth = value;
+			}
+		}
+
+		public float BorderBottomWidth
+		{
+			get
+			{
+				return _node.BorderBottomWidth;
+			}
+
+			set
+			{
+				_node.BorderBottomWidth = value;
+			}
+		}
+
+		public float BorderStartWidth
+		{
+			get
+			{
+				return _node.BorderStartWidth;
+			}
+
+			set
+			{
+				_node.BorderStartWidth = value;
+			}
+		}
+
+		public float BorderEndWidth
+		{
+			get
+			{
+				return _node.BorderEndWidth;
+			}
+
+			set
+			{
+				_node.BorderEndWidth = value;
+			}
+		}
+
+		public float BorderWidth
+		{
+			get
+			{
+				return _node.BorderWidth;
+			}
+
+			set
+			{
+				_node.BorderWidth = value;
+			}
+		}
+
+		public float Height
+		{
+			get
+			{
+				return _node.Height.Value;
+			}
+
+			set
+			{
+				_node.Height = value;
+			}
+		}
+
+		public float Width
+		{
+			get
+			{
+				return _node.Width.Value;
+			}
+
+			set
+			{
+				_node.Width = value;
+			}
+		}
+
+		public float MinWidth
+		{
+			get
+			{
+				return _node.MinWidth.Value;
+			}
+
+			set
+			{
+				_node.MinWidth = value;
+			}
+		}
+
+		public float MinHeight
+		{
+			get
+			{
+				return _node.MinHeight.Value;
+			}
+
+			set
+			{
+				_node.MinHeight = value;
+			}
+		}
+
+		public float MaxWidth
+		{
+			get
+			{
+				return _node.MaxWidth.Value;
+			}
+
+			set
+			{
+				_node.MaxWidth = value;
+			}
+		}
+
+		public float MaxHeight
+		{
+			get
+			{
+				return _node.MaxHeight.Value;
+			}
+
+			set
+			{
+				_node.MaxHeight = value;
+			}
+		}
+
+		public float AspectRatio
+		{
+			get
+			{
+				return _node.StyleAspectRatio;
+			}
+
+			set
+			{
+				_node.StyleAspectRatio = value;
+			}
+		}
+
+		public void ApplyLayout()
+		{
+			NativeView view = null;
+			if (_viewRef.TryGetTarget(out view))
+			{
+				float width = 0;
+				float height = 0;
+				GetWidthHeightOfNativeView(view, out width, out height);
+				CalculateLayoutWithSize(this, width, height);
+				ApplyLayoutToViewHierarchy(view);
+			}
+		}
+		public SizeF IntrinsicSize
+		{
+			get
+			{
+				return CalculateLayoutWithSize(this, float.NaN, float.NaN);
+			}
+		}
+
+		SizeF CalculateLayoutWithSize(YogaLayout layout, float width, float height)
+		{
+			//TODO : Check thread access 
+			if (!layout.IsEnabled)
+			{
+				System.Diagnostics.Debug.WriteLine("Doesn't use Yoga");
+			}
+			NativeView view = null;
+			if (_viewRef.TryGetTarget(out view))
+			{
+				AttachNodesFromViewHierachy(view);
+			}
+
+			var node = layout._node;
+
+			node.Width = width;
+			node.Height = height;
+			node.CalculateLayout();
+
+			return new SizeF { Width = node.LayoutWidth, Height = node.LayoutHeight };
+		}
+
+		static YogaSize MeasureView(YogaNode node, float width, YogaMeasureMode widthMode, float height, YogaMeasureMode heightMode)
+		{
+			var constrainedWidth = (widthMode == YogaMeasureMode.Undefined) ? float.MaxValue : width;
+			var constrainedHeight = (heightMode == YogaMeasureMode.Undefined) ? float.MaxValue : height;
+
+			NativeView view = null;
+			if (YogaKit.Bridges.ContainsKey(node))
+				view = YogaKit.Bridges[node] as NativeView;
+
+			float sizeThatFitsWidth = 0;
+			float sizeThatFitsHeight = 0;
+
+			MeasureNativeView(view, constrainedWidth, constrainedHeight, out sizeThatFitsWidth, out sizeThatFitsHeight);
+
+			var finalWidth = SanitizeMeasurement(constrainedWidth, sizeThatFitsWidth, widthMode);
+			var finalHeight = SanitizeMeasurement(constrainedHeight, sizeThatFitsHeight, heightMode);
+
+			return MeasureOutput.Make(finalWidth, finalHeight);
+		}
+
+		static float SanitizeMeasurement(float constrainedSize, float measuredSize, YogaMeasureMode measureMode)
+		{
+			float result;
+			if (measureMode == YogaMeasureMode.Exactly)
+			{
+				result = (float)constrainedSize;
+			}
+			else if (measureMode == YogaMeasureMode.AtMost)
+			{
+				result = (float)Math.Min(constrainedSize, measuredSize);
+			}
+			else {
+				result = (float)measuredSize;
+			}
+
+			return result;
+		}
+
+		static bool NodeHasExactSameChildren(YogaNode node, NativeView[] subviews)
+		{
+			if (node.Count != subviews.Length)
+				return false;
+			for (int i = 0; i < subviews.Length; i++)
+			{
+				YogaLayout yoga = subviews[i].Yoga() as YogaLayout;
+				if (node[i] != yoga._node)
+				{
+					return false;
+				}
+			}
+			return true;
+		}
+
+		static void AttachNodesFromViewHierachy(NativeView view)
+		{
+			YogaLayout yoga = view.Yoga() as YogaLayout;
+			var node = yoga._node;
+			// Only leaf nodes should have a measure function
+			if (yoga.IsLeaf)
+			{
+				RemoveAllChildren(node);
+				node.SetMeasureFunction(MeasureView);
+			}
+			else
+			{
+				node.SetMeasureFunction(null);
+				// Create a list of all the subviews that we are going to use for layout.
+				var subviewsToInclude = new List<NativeView>();
+				foreach (var subview in view.Subviews)
+				{
+					if (subview.Yoga().IsIncludeInLayout)
+					{
+						subviewsToInclude.Add(subview);
+					}
+				}
+
+				if (!NodeHasExactSameChildren(node, subviewsToInclude.ToArray()))
+				{
+					RemoveAllChildren(node);
+					for (int i = 0; i < subviewsToInclude.Count; i++)
+					{
+						YogaLayout yogaSubview = subviewsToInclude[i].Yoga() as YogaLayout;
+						node.Insert(i, yogaSubview._node);
+					}
+				}
+
+				foreach (var subView in subviewsToInclude)
+				{
+					AttachNodesFromViewHierachy(subView);
+				}
+			}
+		}
+
+		static void RemoveAllChildren(YogaNode node)
+		{
+			if (node == null)
+				return;
+
+			if (node.Count > 0)
+			{
+				node.Clear();
+			}
+		}
+
+		static double RoundPixelValue(float value)
+		{
+			float scale = NativePixelScale;
+
+			return Math.Round(value * scale) / scale;
+		}
+
+		static void ApplyLayoutToViewHierarchy(NativeView view)
+		{
+			//TODO : "Framesetting should only be done on the main thread."
+			YogaLayout yoga = view.Yoga() as YogaLayout;
+
+			if (!yoga.IsIncludeInLayout)
+				return;
+
+			var node = yoga._node;
+
+			ApplyLayoutToNativeView(view, node);
+
+			if (!yoga.IsLeaf)
+			{
+				for (int i = 0; i < view.Subviews.Length; i++)
+				{
+					ApplyLayoutToViewHierarchy(view.Subviews[i]);
+				}
+			}
+		}
+
+
+	}
+}
+

csharp/Mac/.gitignore

@@ -0,0 +1,2 @@
+libyoga.dylib
+*.userprefs

csharp/Mac/ApiDefinition.cs

@@ -0,0 +1,23 @@
+/**
+ * Copyright (c) 2014-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+
+using System;
+
+using AppKit;
+using Foundation;
+using ObjCRuntime;
+using CoreGraphics;
+
+namespace Facebook.Yoga.Mac
+{
+    // Xamarin.Mac binding projects allow you to include native libraries inside C# DLLs for easy consumption
+    // later. However, the binding project build files currently assume you are binding some objective-c API
+    // and that you need an ApiDefinition.cs for that. yoga is all C APIs, so just include this "blank" file so
+    // the dylib gets packaged
+}

csharp/Mac/CustomBuildAction.targets

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+    <PropertyGroup>
+        <CompileDependsOn>NativeLibrary;$(CompileDependsOn)</CompileDependsOn>
+    </PropertyGroup>
+    <Target Name="NativeLibrary" Outputs="$(ProjectDir)libyoga.dylib">
+        <Exec WorkingDirectory="$(ProjectDir)" Command="$(ProjectDir)buck-build.sh //csharp:yoganet#default,shared" />
+        <Copy SourceFiles="$(ProjectDir)..\..\buck-out\gen\csharp\yoganet#default,shared\libyoga.dylib" DestinationFiles="$(ProjectDir)libyoga.dylib" SkipUnchangedFiles="true" />
+    </Target>
+</Project>

csharp/Mac/Facebook.Yoga.Mac.Sample/AppDelegate.cs

@@ -0,0 +1,30 @@
+/**
+ * Copyright 2014-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the license found in the
+ * LICENSE-examples file in the root directory of this source tree.
+ */
+
+using AppKit;
+using Foundation;
+
+namespace Facebook.Yoga.Mac.Sample
+{
+    [Register("AppDelegate")]
+    public class AppDelegate : NSApplicationDelegate
+    {
+        public AppDelegate()
+        {
+        }
+
+        public override void DidFinishLaunching(NSNotification notification)
+        {
+        }
+
+        public override void WillTerminate(NSNotification notification)
+        {
+            // Insert code here to tear down your application
+        }
+    }
+}

csharp/Mac/Facebook.Yoga.Mac.Sample/Entitlements.plist

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+</dict>
+</plist>

csharp/Mac/Facebook.Yoga.Mac.Sample/Facebook.Yoga.Mac.Sample.csproj

@@ -0,0 +1,84 @@
+<?xml version="1.0" encoding="utf-8"?>
+<Project DefaultTargets="Build" ToolsVersion="4.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
+  <PropertyGroup>
+    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
+    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
+    <ProjectGuid>{64E0AB97-A904-4607-A535-EEA5A966C09E}</ProjectGuid>
+    <ProjectTypeGuids>{A3F8F2AB-B479-4A4A-A458-A89E7DC349F1};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>
+    <OutputType>Exe</OutputType>
+    <RootNamespace>Facebook.Yoga.Mac.Sample</RootNamespace>
+    <AssemblyName>Facebook.Yoga.Mac.Sample</AssemblyName>
+    <TargetFrameworkVersion>v2.0</TargetFrameworkVersion>
+    <TargetFrameworkIdentifier>Xamarin.Mac</TargetFrameworkIdentifier>
+    <MonoMacResourcePrefix>Resources</MonoMacResourcePrefix>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
+    <DebugSymbols>true</DebugSymbols>
+    <DebugType>full</DebugType>
+    <Optimize>false</Optimize>
+    <OutputPath>bin\Debug</OutputPath>
+    <DefineConstants>DEBUG;</DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <EnableCodeSigning>false</EnableCodeSigning>
+    <CodeSigningKey>Mac Developer</CodeSigningKey>
+    <CreatePackage>false</CreatePackage>
+    <EnablePackageSigning>false</EnablePackageSigning>
+    <IncludeMonoRuntime>false</IncludeMonoRuntime>
+    <UseSGen>true</UseSGen>
+    <UseRefCounting>true</UseRefCounting>
+    <Profiling>true</Profiling>
+    <HttpClientHandler>HttpClientHandler</HttpClientHandler>
+    <TlsProvider>Default</TlsProvider>
+    <LinkMode>None</LinkMode>
+    <XamMacArch>x86_64</XamMacArch>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
+    <DebugType>pdbonly</DebugType>
+    <Optimize>true</Optimize>
+    <OutputPath>bin\Release</OutputPath>
+    <DefineConstants></DefineConstants>
+    <ErrorReport>prompt</ErrorReport>
+    <WarningLevel>4</WarningLevel>
+    <EnableCodeSigning>false</EnableCodeSigning>
+    <CreatePackage>true</CreatePackage>
+    <EnablePackageSigning>false</EnablePackageSigning>
+    <IncludeMonoRuntime>true</IncludeMonoRuntime>
+    <UseSGen>true</UseSGen>
+    <UseRefCounting>true</UseRefCounting>
+    <LinkMode>SdkOnly</LinkMode>
+    <HttpClientHandler>HttpClientHandler</HttpClientHandler>
+    <TlsProvider>Default</TlsProvider>
+    <XamMacArch></XamMacArch>
+  </PropertyGroup>
+  <ItemGroup>
+    <Reference Include="System" />
+    <Reference Include="System.Core" />
+    <Reference Include="Xamarin.Mac" />
+  </ItemGroup>
+  <ItemGroup>
+    <Folder Include="Resources\" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="Info.plist" />
+    <None Include="Entitlements.plist" />
+  </ItemGroup>
+  <ItemGroup>
+    <Compile Include="Main.cs" />
+    <Compile Include="AppDelegate.cs" />
+    <Compile Include="ViewController.cs" />
+    <Compile Include="ViewController.designer.cs">
+      <DependentUpon>ViewController.cs</DependentUpon>
+    </Compile>
+  </ItemGroup>
+  <ItemGroup>
+    <InterfaceDefinition Include="Main.storyboard" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\Facebook.Yoga.Mac.csproj">
+      <Project>{19A1C7D7-C9CC-476A-B604-DF6A3DE1BA71}</Project>
+      <Name>Facebook.Yoga.Mac</Name>
+    </ProjectReference>
+  </ItemGroup>
+  <Import Project="$(MSBuildExtensionsPath)\Xamarin\Mac\Xamarin.Mac.CSharp.targets" />
+</Project>

csharp/Mac/Facebook.Yoga.Mac.Sample/Info.plist

@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleName</key>
+	<string>Facebook.Yoga.Mac.Sample</string>
+	<key>CFBundleIdentifier</key>
+	<string>com.facebook.facebook-yoga-mac-sample</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0</string>
+	<key>CFBundleVersion</key>
+	<string>1</string>
+	<key>LSMinimumSystemVersion</key>
+	<string>10.11</string>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>en</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundlePackageType</key>
+	<string>APPL</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>NSHumanReadableCopyright</key>
+	<string>${AuthorCopyright}</string>
+	<key>NSPrincipalClass</key>
+	<string>NSApplication</string>
+	<key>NSMainStoryboardFile</key>
+	<string>Main</string>
+</dict>
+</plist>

csharp/Mac/Facebook.Yoga.Mac.Sample/Main.cs

@@ -0,0 +1,21 @@
+/**
+ * Copyright 2014-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the license found in the
+ * LICENSE-examples file in the root directory of this source tree.
+ */
+
+using AppKit;
+
+namespace Facebook.Yoga.Mac.Sample
+{
+    static class MainClass
+    {
+        static void Main(string[] args)
+        {
+            NSApplication.Init();
+            NSApplication.Main(args);
+        }
+    }
+}

csharp/Mac/Facebook.Yoga.Mac.Sample/Main.storyboard

@@ -0,0 +1,681 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<document type="com.apple.InterfaceBuilder3.Cocoa.Storyboard.XIB" version="3.0" toolsVersion="6198" systemVersion="14A297b" targetRuntime="MacOSX.Cocoa" propertyAccessControl="none" useAutolayout="YES" initialViewController="B8D-0N-5wS">
+	<dependencies>
+		<plugIn identifier="com.apple.InterfaceBuilder.CocoaPlugin" version="6198" />
+	</dependencies>
+	<scenes>
+		<!--Application-->
+		<scene sceneID="JPo-4y-FX3">
+			<objects>
+				<application id="hnw-xV-0zn" sceneMemberID="viewController">
+					<menu key="mainMenu" title="Main Menu" systemMenu="main" id="AYu-sK-qS6">
+						<items>
+							<menuItem title="Facebook.Yoga.Mac.Sample" id="1Xt-HY-uBw">
+								<modifierMask key="keyEquivalentModifierMask" />
+								<menu key="submenu" title="Facebook.Yoga.Mac.Sample" systemMenu="apple" id="uQy-DD-JDr">
+									<items>
+										<menuItem title="About Facebook.Yoga.Mac.Sample" id="5kV-Vb-QxS">
+											<modifierMask key="keyEquivalentModifierMask" />
+											<connections>
+												<action selector="orderFrontStandardAboutPanel:" target="Ady-hI-5gd" id="Exp-CZ-Vem" />
+											</connections>
+										</menuItem>
+										<menuItem isSeparatorItem="YES" id="VOq-y0-SEH" />
+										<menuItem title="Preferences…" keyEquivalent="," id="BOF-NM-1cW" />
+										<menuItem isSeparatorItem="YES" id="wFC-TO-SCJ" />
+										<menuItem title="Services" id="NMo-om-nkz">
+											<modifierMask key="keyEquivalentModifierMask" />
+											<menu key="submenu" title="Services" systemMenu="services" id="hz9-B4-Xy5" />
+										</menuItem>
+										<menuItem isSeparatorItem="YES" id="4je-JR-u6R" />
+										<menuItem title="Hide Facebook.Yoga.Mac.Sample" keyEquivalent="h" id="Olw-nP-bQN">
+											<connections>
+												<action selector="hide:" target="Ady-hI-5gd" id="PnN-Uc-m68" />
+											</connections>
+										</menuItem>
+										<menuItem title="Hide Others" keyEquivalent="h" id="Vdr-fp-XzO">
+											<modifierMask key="keyEquivalentModifierMask" option="YES" command="YES" />
+											<connections>
+												<action selector="hideOtherApplications:" target="Ady-hI-5gd" id="VT4-aY-XCT" />
+											</connections>
+										</menuItem>
+										<menuItem title="Show All" id="Kd2-mp-pUS">
+											<modifierMask key="keyEquivalentModifierMask" />
+											<connections>
+												<action selector="unhideAllApplications:" target="Ady-hI-5gd" id="Dhg-Le-xox" />
+											</connections>
+										</menuItem>
+										<menuItem isSeparatorItem="YES" id="kCx-OE-vgT" />
+										<menuItem title="Quit Facebook.Yoga.Mac.Sample" keyEquivalent="q" id="4sb-4s-VLi">
+											<connections>
+												<action selector="terminate:" target="Ady-hI-5gd" id="Te7-pn-YzF" />
+											</connections>
+										</menuItem>
+									</items>
+								</menu>
+							</menuItem>
+							<menuItem title="File" id="dMs-cI-mzQ">
+								<modifierMask key="keyEquivalentModifierMask" />
+								<menu key="submenu" title="File" id="bib-Uj-vzu">
+									<items>
+										<menuItem title="New" keyEquivalent="n" id="Was-JA-tGl">
+											<connections>
+												<action selector="newDocument:" target="Ady-hI-5gd" id="4Si-XN-c54" />
+											</connections>
+										</menuItem>
+										<menuItem title="Open…" keyEquivalent="o" id="IAo-SY-fd9">
+											<connections>
+												<action selector="openDocument:" target="Ady-hI-5gd" id="bVn-NM-KNZ" />
+											</connections>
+										</menuItem>
+										<menuItem title="Open Recent" id="tXI-mr-wws">
+											<modifierMask key="keyEquivalentModifierMask" />
+											<menu key="submenu" title="Open Recent" systemMenu="recentDocuments" id="oas-Oc-fiZ">
+												<items>
+													<menuItem title="Clear Menu" id="vNY-rz-j42">
+														<modifierMask key="keyEquivalentModifierMask" />
+														<connections>
+															<action selector="clearRecentDocuments:" target="Ady-hI-5gd" id="Daa-9d-B3U" />
+														</connections>
+													</menuItem>
+												</items>
+											</menu>
+										</menuItem>
+										<menuItem isSeparatorItem="YES" id="m54-Is-iLE" />
+										<menuItem title="Close" keyEquivalent="w" id="DVo-aG-piG">
+											<connections>
+												<action selector="performClose:" target="Ady-hI-5gd" id="HmO-Ls-i7Q" />
+											</connections>
+										</menuItem>
+										<menuItem title="Save…" keyEquivalent="s" id="pxx-59-PXV">
+											<connections>
+												<action selector="saveDocument:" target="Ady-hI-5gd" id="teZ-XB-qJY" />
+											</connections>
+										</menuItem>
+										<menuItem title="Save As…" keyEquivalent="S" id="Bw7-FT-i3A">
+											<connections>
+												<action selector="saveDocumentAs:" target="Ady-hI-5gd" id="mDf-zr-I0C" />
+											</connections>
+										</menuItem>
+										<menuItem title="Revert to Saved" id="KaW-ft-85H">
+											<modifierMask key="keyEquivalentModifierMask" />
+											<connections>
+												<action selector="revertDocumentToSaved:" target="Ady-hI-5gd" id="iJ3-Pv-kwq" />
+											</connections>
+										</menuItem>
+										<menuItem isSeparatorItem="YES" id="aJh-i4-bef" />
+										<menuItem title="Page Setup…" keyEquivalent="P" id="qIS-W8-SiK">
+											<modifierMask key="keyEquivalentModifierMask" shift="YES" command="YES" />
+											<connections>
+												<action selector="runPageLayout:" target="Ady-hI-5gd" id="Din-rz-gC5" />
+											</connections>
+										</menuItem>
+										<menuItem title="Print…" keyEquivalent="p" id="aTl-1u-JFS">
+											<connections>
+												<action selector="print:" target="Ady-hI-5gd" id="qaZ-4w-aoO" />
+											</connections>
+										</menuItem>
+									</items>
+								</menu>
+							</menuItem>
+							<menuItem title="Edit" id="5QF-Oa-p0T">
+								<modifierMask key="keyEquivalentModifierMask" />
+								<menu key="submenu" title="Edit" id="W48-6f-4Dl">
+									<items>
+										<menuItem title="Undo" keyEquivalent="z" id="dRJ-4n-Yzg">
+											<connections>
+												<action selector="undo:" target="Ady-hI-5gd" id="M6e-cu-g7V" />
+											</connections>
+										</menuItem>
+										<menuItem title="Redo" keyEquivalent="Z" id="6dh-zS-Vam">
+											<connections>
+												<action selector="redo:" target="Ady-hI-5gd" id="oIA-Rs-6OD" />
+											</connections>
+										</menuItem>
+										<menuItem isSeparatorItem="YES" id="WRV-NI-Exz" />
+										<menuItem title="Cut" keyEquivalent="x" id="uRl-iY-unG">
+											<connections>
+												<action selector="cut:" target="Ady-hI-5gd" id="YJe-68-I9s" />
+											</connections>
+										</menuItem>
+										<menuItem title="Copy" keyEquivalent="c" id="x3v-GG-iWU">
+											<connections>
+												<action selector="copy:" target="Ady-hI-5gd" id="G1f-GL-Joy" />
+											</connections>
+										</menuItem>
+										<menuItem title="Paste" keyEquivalent="v" id="gVA-U4-sdL">
+											<connections>
+												<action selector="paste:" target="Ady-hI-5gd" id="UvS-8e-Qdg" />
+											</connections>
+										</menuItem>
+										<menuItem title="Paste and Match Style" keyEquivalent="V" id="WeT-3V-zwk">
+											<modifierMask key="keyEquivalentModifierMask" option="YES" command="YES" />
+											<connections>
+												<action selector="pasteAsPlainText:" target="Ady-hI-5gd" id="cEh-KX-wJQ" />
+											</connections>
+										</menuItem>
+										<menuItem title="Delete" id="pa3-QI-u2k">
+											<modifierMask key="keyEquivalentModifierMask" />
+											<connections>
+												<action selector="delete:" target="Ady-hI-5gd" id="0Mk-Ml-PaM" />
+											</connections>
+										</menuItem>
+										<menuItem title="Select All" keyEquivalent="a" id="Ruw-6m-B2m">
+											<connections>
+												<action selector="selectAll:" target="Ady-hI-5gd" id="VNm-Mi-diN" />
+											</connections>
+										</menuItem>
+										<menuItem isSeparatorItem="YES" id="uyl-h8-XO2" />
+										<menuItem title="Find" id="4EN-yA-p0u">
+											<modifierMask key="keyEquivalentModifierMask" />
+											<menu key="submenu" title="Find" id="1b7-l0-nxx">
+												<items>
+													<menuItem title="Find…" tag="1" keyEquivalent="f" id="Xz5-n4-O0W">
+														<connections>
+															<action selector="performFindPanelAction:" target="Ady-hI-5gd" id="cD7-Qs-BN4" />
+														</connections>
+													</menuItem>
+													<menuItem title="Find and Replace…" tag="12" keyEquivalent="f" id="YEy-JH-Tfz">
+														<modifierMask key="keyEquivalentModifierMask" option="YES" command="YES" />
+														<connections>
+															<action selector="performFindPanelAction:" target="Ady-hI-5gd" id="WD3-Gg-5AJ" />
+														</connections>
+													</menuItem>
+													<menuItem title="Find Next" tag="2" keyEquivalent="g" id="q09-fT-Sye">
+														<connections>
+															<action selector="performFindPanelAction:" target="Ady-hI-5gd" id="NDo-RZ-v9R" />
+														</connections>
+													</menuItem>
+													<menuItem title="Find Previous" tag="3" keyEquivalent="G" id="OwM-mh-QMV">
+														<connections>
+															<action selector="performFindPanelAction:" target="Ady-hI-5gd" id="HOh-sY-3ay" />
+														</connections>
+													</menuItem>
+													<menuItem title="Use Selection for Find" tag="7" keyEquivalent="e" id="buJ-ug-pKt">
+														<connections>
+															<action selector="performFindPanelAction:" target="Ady-hI-5gd" id="U76-nv-p5D" />
+														</connections>
+													</menuItem>
+													<menuItem title="Jump to Selection" keyEquivalent="j" id="S0p-oC-mLd">
+														<connections>
+															<action selector="centerSelectionInVisibleArea:" target="Ady-hI-5gd" id="IOG-6D-g5B" />
+														</connections>
+													</menuItem>
+												</items>
+											</menu>
+										</menuItem>
+										<menuItem title="Spelling and Grammar" id="Dv1-io-Yv7">
+											<modifierMask key="keyEquivalentModifierMask" />
+											<menu key="submenu" title="Spelling" id="3IN-sU-3Bg">
+												<items>
+													<menuItem title="Show Spelling and Grammar" keyEquivalent=":" id="HFo-cy-zxI">
+														<connections>
+															<action selector="showGuessPanel:" target="Ady-hI-5gd" id="vFj-Ks-hy3" />
+														</connections>
+													</menuItem>
+													<menuItem title="Check Document Now" keyEquivalent=";" id="hz2-CU-CR7">
+														<connections>
+															<action selector="checkSpelling:" target="Ady-hI-5gd" id="fz7-VC-reM" />
+														</connections>
+													</menuItem>
+													<menuItem isSeparatorItem="YES" id="bNw-od-mp5" />
+													<menuItem title="Check Spelling While Typing" id="rbD-Rh-wIN">
+														<modifierMask key="keyEquivalentModifierMask" />
+														<connections>
+															<action selector="toggleContinuousSpellChecking:" target="Ady-hI-5gd" id="7w6-Qz-0kB" />
+														</connections>
+													</menuItem>
+													<menuItem title="Check Grammar With Spelling" id="mK6-2p-4JG">
+														<modifierMask key="keyEquivalentModifierMask" />
+														<connections>
+															<action selector="toggleGrammarChecking:" target="Ady-hI-5gd" id="muD-Qn-j4w" />
+														</connections>
+													</menuItem>
+													<menuItem title="Correct Spelling Automatically" id="78Y-hA-62v">
+														<modifierMask key="keyEquivalentModifierMask" />
+														<connections>
+															<action selector="toggleAutomaticSpellingCorrection:" target="Ady-hI-5gd" id="2lM-Qi-WAP" />
+														</connections>
+													</menuItem>
+												</items>
+											</menu>
+										</menuItem>
+										<menuItem title="Substitutions" id="9ic-FL-obx">
+											<modifierMask key="keyEquivalentModifierMask" />
+											<menu key="submenu" title="Substitutions" id="FeM-D8-WVr">
+												<items>
+													<menuItem title="Show Substitutions" id="z6F-FW-3nz">
+														<modifierMask key="keyEquivalentModifierMask" />
+														<connections>
+															<action selector="orderFrontSubstitutionsPanel:" target="Ady-hI-5gd" id="oku-mr-iSq" />
+														</connections>
+													</menuItem>
+													<menuItem isSeparatorItem="YES" id="gPx-C9-uUO" />
+													<menuItem title="Smart Copy/Paste" id="9yt-4B-nSM">
+														<modifierMask key="keyEquivalentModifierMask" />
+														<connections>
+															<action selector="toggleSmartInsertDelete:" target="Ady-hI-5gd" id="3IJ-Se-DZD" />
+														</connections>
+													</menuItem>
+													<menuItem title="Smart Quotes" id="hQb-2v-fYv">
+														<modifierMask key="keyEquivalentModifierMask" />
+														<connections>
+															<action selector="toggleAutomaticQuoteSubstitution:" target="Ady-hI-5gd" id="ptq-xd-QOA" />
+														</connections>
+													</menuItem>
+													<menuItem title="Smart Dashes" id="rgM-f4-ycn">
+														<modifierMask key="keyEquivalentModifierMask" />
+														<connections>
+															<action selector="toggleAutomaticDashSubstitution:" target="Ady-hI-5gd" id="oCt-pO-9gS" />
+														</connections>
+													</menuItem>
+													<menuItem title="Smart Links" id="cwL-P1-jid">
+														<modifierMask key="keyEquivalentModifierMask" />
+														<connections>
+															<action selector="toggleAutomaticLinkDetection:" target="Ady-hI-5gd" id="Gip-E3-Fov" />
+														</connections>
+													</menuItem>
+													<menuItem title="Data Detectors" id="tRr-pd-1PS">
+														<modifierMask key="keyEquivalentModifierMask" />
+														<connections>
+															<action selector="toggleAutomaticDataDetection:" target="Ady-hI-5gd" id="R1I-Nq-Kbl" />
+														</connections>
+													</menuItem>
+													<menuItem title="Text Replacement" id="HFQ-gK-NFA">
+														<modifierMask key="keyEquivalentModifierMask" />
+														<connections>
+															<action selector="toggleAutomaticTextReplacement:" target="Ady-hI-5gd" id="DvP-Fe-Py6" />
+														</connections>
+													</menuItem>
+												</items>
+											</menu>
+										</menuItem>
+										<menuItem title="Transformations" id="2oI-Rn-ZJC">
+											<modifierMask key="keyEquivalentModifierMask" />
+											<menu key="submenu" title="Transformations" id="c8a-y6-VQd">
+												<items>
+													<menuItem title="Make Upper Case" id="vmV-6d-7jI">
+														<modifierMask key="keyEquivalentModifierMask" />
+														<connections>
+															<action selector="uppercaseWord:" target="Ady-hI-5gd" id="sPh-Tk-edu" />
+														</connections>
+													</menuItem>
+													<menuItem title="Make Lower Case" id="d9M-CD-aMd">
+														<modifierMask key="keyEquivalentModifierMask" />
+														<connections>
+															<action selector="lowercaseWord:" target="Ady-hI-5gd" id="iUZ-b5-hil" />
+														</connections>
+													</menuItem>
+													<menuItem title="Capitalize" id="UEZ-Bs-lqG">
+														<modifierMask key="keyEquivalentModifierMask" />
+														<connections>
+															<action selector="capitalizeWord:" target="Ady-hI-5gd" id="26H-TL-nsh" />
+														</connections>
+													</menuItem>
+												</items>
+											</menu>
+										</menuItem>
+										<menuItem title="Speech" id="xrE-MZ-jX0">
+											<modifierMask key="keyEquivalentModifierMask" />
+											<menu key="submenu" title="Speech" id="3rS-ZA-NoH">
+												<items>
+													<menuItem title="Start Speaking" id="Ynk-f8-cLZ">
+														<modifierMask key="keyEquivalentModifierMask" />
+														<connections>
+															<action selector="startSpeaking:" target="Ady-hI-5gd" id="654-Ng-kyl" />
+														</connections>
+													</menuItem>
+													<menuItem title="Stop Speaking" id="Oyz-dy-DGm">
+														<modifierMask key="keyEquivalentModifierMask" />
+														<connections>
+															<action selector="stopSpeaking:" target="Ady-hI-5gd" id="dX8-6p-jy9" />
+														</connections>
+													</menuItem>
+												</items>
+											</menu>
+										</menuItem>
+									</items>
+								</menu>
+							</menuItem>
+							<menuItem title="Format" id="jxT-CU-nIS">
+								<modifierMask key="keyEquivalentModifierMask" />
+								<menu key="submenu" title="Format" id="GEO-Iw-cKr">
+									<items>
+										<menuItem title="Font" id="Gi5-1S-RQB">
+											<modifierMask key="keyEquivalentModifierMask" />
+											<menu key="submenu" title="Font" systemMenu="font" id="aXa-aM-Jaq">
+												<items>
+													<menuItem title="Show Fonts" keyEquivalent="t" id="Q5e-8K-NDq" />
+													<menuItem title="Bold" tag="2" keyEquivalent="b" id="GB9-OM-e27" />
+													<menuItem title="Italic" tag="1" keyEquivalent="i" id="Vjx-xi-njq" />
+													<menuItem title="Underline" keyEquivalent="u" id="WRG-CD-K1S">
+														<connections>
+															<action selector="underline:" target="Ady-hI-5gd" id="FYS-2b-JAY" />
+														</connections>
+													</menuItem>
+													<menuItem isSeparatorItem="YES" id="5gT-KC-WSO" />
+													<menuItem title="Bigger" tag="3" keyEquivalent="+" id="Ptp-SP-VEL" />
+													<menuItem title="Smaller" tag="4" keyEquivalent="-" id="i1d-Er-qST" />
+													<menuItem isSeparatorItem="YES" id="kx3-Dk-x3B" />
+													<menuItem title="Kern" id="jBQ-r6-VK2">
+														<modifierMask key="keyEquivalentModifierMask" />
+														<menu key="submenu" title="Kern" id="tlD-Oa-oAM">
+															<items>
+																<menuItem title="Use Default" id="GUa-eO-cwY">
+																	<modifierMask key="keyEquivalentModifierMask" />
+																	<connections>
+																		<action selector="useStandardKerning:" target="Ady-hI-5gd" id="6dk-9l-Ckg" />
+																	</connections>
+																</menuItem>
+																<menuItem title="Use None" id="cDB-IK-hbR">
+																	<modifierMask key="keyEquivalentModifierMask" />
+																	<connections>
+																		<action selector="turnOffKerning:" target="Ady-hI-5gd" id="U8a-gz-Maa" />
+																	</connections>
+																</menuItem>
+																<menuItem title="Tighten" id="46P-cB-AYj">
+																	<modifierMask key="keyEquivalentModifierMask" />
+																	<connections>
+																		<action selector="tightenKerning:" target="Ady-hI-5gd" id="hr7-Nz-8ro" />
+																	</connections>
+																</menuItem>
+																<menuItem title="Loosen" id="ogc-rX-tC1">
+																	<modifierMask key="keyEquivalentModifierMask" />
+																	<connections>
+																		<action selector="loosenKerning:" target="Ady-hI-5gd" id="8i4-f9-FKE" />
+																	</connections>
+																</menuItem>
+															</items>
+														</menu>
+													</menuItem>
+													<menuItem title="Ligatures" id="o6e-r0-MWq">
+														<modifierMask key="keyEquivalentModifierMask" />
+														<menu key="submenu" title="Ligatures" id="w0m-vy-SC9">
+															<items>
+																<menuItem title="Use Default" id="agt-UL-0e3">
+																	<modifierMask key="keyEquivalentModifierMask" />
+																	<connections>
+																		<action selector="useStandardLigatures:" target="Ady-hI-5gd" id="7uR-wd-Dx6" />
+																	</connections>
+																</menuItem>
+																<menuItem title="Use None" id="J7y-lM-qPV">
+																	<modifierMask key="keyEquivalentModifierMask" />
+																	<connections>
+																		<action selector="turnOffLigatures:" target="Ady-hI-5gd" id="iX2-gA-Ilz" />
+																	</connections>
+																</menuItem>
+																<menuItem title="Use All" id="xQD-1f-W4t">
+																	<modifierMask key="keyEquivalentModifierMask" />
+																	<connections>
+																		<action selector="useAllLigatures:" target="Ady-hI-5gd" id="KcB-kA-TuK" />
+																	</connections>
+																</menuItem>
+															</items>
+														</menu>
+													</menuItem>
+													<menuItem title="Baseline" id="OaQ-X3-Vso">
+														<modifierMask key="keyEquivalentModifierMask" />
+														<menu key="submenu" title="Baseline" id="ijk-EB-dga">
+															<items>
+																<menuItem title="Use Default" id="3Om-Ey-2VK">
+																	<modifierMask key="keyEquivalentModifierMask" />
+																	<connections>
+																		<action selector="unscript:" target="Ady-hI-5gd" id="0vZ-95-Ywn" />
+																	</connections>
+																</menuItem>
+																<menuItem title="Superscript" id="Rqc-34-cIF">
+																	<modifierMask key="keyEquivalentModifierMask" />
+																	<connections>
+																		<action selector="superscript:" target="Ady-hI-5gd" id="3qV-fo-wpU" />
+																	</connections>
+																</menuItem>
+																<menuItem title="Subscript" id="I0S-gh-46l">
+																	<modifierMask key="keyEquivalentModifierMask" />
+																	<connections>
+																		<action selector="subscript:" target="Ady-hI-5gd" id="Q6W-4W-IGz" />
+																	</connections>
+																</menuItem>
+																<menuItem title="Raise" id="2h7-ER-AoG">
+																	<modifierMask key="keyEquivalentModifierMask" />
+																	<connections>
+																		<action selector="raiseBaseline:" target="Ady-hI-5gd" id="4sk-31-7Q9" />
+																	</connections>
+																</menuItem>
+																<menuItem title="Lower" id="1tx-W0-xDw">
+																	<modifierMask key="keyEquivalentModifierMask" />
+																	<connections>
+																		<action selector="lowerBaseline:" target="Ady-hI-5gd" id="OF1-bc-KW4" />
+																	</connections>
+																</menuItem>
+															</items>
+														</menu>
+													</menuItem>
+													<menuItem isSeparatorItem="YES" id="Ndw-q3-faq" />
+													<menuItem title="Show Colors" keyEquivalent="C" id="bgn-CT-cEk">
+														<connections>
+															<action selector="orderFrontColorPanel:" target="Ady-hI-5gd" id="mSX-Xz-DV3" />
+														</connections>
+													</menuItem>
+													<menuItem isSeparatorItem="YES" id="iMs-zA-UFJ" />
+													<menuItem title="Copy Style" keyEquivalent="c" id="5Vv-lz-BsD">
+														<modifierMask key="keyEquivalentModifierMask" option="YES" command="YES" />
+														<connections>
+															<action selector="copyFont:" target="Ady-hI-5gd" id="GJO-xA-L4q" />
+														</connections>
+													</menuItem>
+													<menuItem title="Paste Style" keyEquivalent="v" id="vKC-jM-MkH">
+														<modifierMask key="keyEquivalentModifierMask" option="YES" command="YES" />
+														<connections>
+															<action selector="pasteFont:" target="Ady-hI-5gd" id="JfD-CL-leO" />
+														</connections>
+													</menuItem>
+												</items>
+											</menu>
+										</menuItem>
+										<menuItem title="Text" id="Fal-I4-PZk">
+											<modifierMask key="keyEquivalentModifierMask" />
+											<menu key="submenu" title="Text" id="d9c-me-L2H">
+												<items>
+													<menuItem title="Align Left" keyEquivalent="{" id="ZM1-6Q-yy1">
+														<connections>
+															<action selector="alignLeft:" target="Ady-hI-5gd" id="zUv-R1-uAa" />
+														</connections>
+													</menuItem>
+													<menuItem title="Center" keyEquivalent="|" id="VIY-Ag-zcb">
+														<connections>
+															<action selector="alignCenter:" target="Ady-hI-5gd" id="spX-mk-kcS" />
+														</connections>
+													</menuItem>
+													<menuItem title="Justify" id="J5U-5w-g23">
+														<modifierMask key="keyEquivalentModifierMask" />
+														<connections>
+															<action selector="alignJustified:" target="Ady-hI-5gd" id="ljL-7U-jND" />
+														</connections>
+													</menuItem>
+													<menuItem title="Align Right" keyEquivalent="}" id="wb2-vD-lq4">
+														<connections>
+															<action selector="alignRight:" target="Ady-hI-5gd" id="r48-bG-YeY" />
+														</connections>
+													</menuItem>
+													<menuItem isSeparatorItem="YES" id="4s2-GY-VfK" />
+													<menuItem title="Writing Direction" id="H1b-Si-o9J">
+														<modifierMask key="keyEquivalentModifierMask" />
+														<menu key="submenu" title="Writing Direction" id="8mr-sm-Yjd">
+															<items>
+																<menuItem title="Paragraph" enabled="NO" id="ZvO-Gk-QUH">
+																	<modifierMask key="keyEquivalentModifierMask" />
+																</menuItem>
+																<menuItem id="YGs-j5-SAR">
+																	<string key="title">	Default</string>
+																	<modifierMask key="keyEquivalentModifierMask" />
+																	<connections>
+																		<action selector="makeBaseWritingDirectionNatural:" target="Ady-hI-5gd" id="qtV-5e-UBP" />
+																	</connections>
+																</menuItem>
+																<menuItem id="Lbh-J2-qVU">
+																	<string key="title">	Left to Right</string>
+																	<modifierMask key="keyEquivalentModifierMask" />
+																	<connections>
+																		<action selector="makeBaseWritingDirectionLeftToRight:" target="Ady-hI-5gd" id="S0X-9S-QSf" />
+																	</connections>
+																</menuItem>
+																<menuItem id="jFq-tB-4Kx">
+																	<string key="title">	Right to Left</string>
+																	<modifierMask key="keyEquivalentModifierMask" />
+																	<connections>
+																		<action selector="makeBaseWritingDirectionRightToLeft:" target="Ady-hI-5gd" id="5fk-qB-AqJ" />
+																	</connections>
+																</menuItem>
+																<menuItem isSeparatorItem="YES" id="swp-gr-a21" />
+																<menuItem title="Selection" enabled="NO" id="cqv-fj-IhA">
+																	<modifierMask key="keyEquivalentModifierMask" />
+																</menuItem>
+																<menuItem id="Nop-cj-93Q">
+																	<string key="title">	Default</string>
+																	<modifierMask key="keyEquivalentModifierMask" />
+																	<connections>
+																		<action selector="makeTextWritingDirectionNatural:" target="Ady-hI-5gd" id="lPI-Se-ZHp" />
+																	</connections>
+																</menuItem>
+																<menuItem id="BgM-ve-c93">
+																	<string key="title">	Left to Right</string>
+																	<modifierMask key="keyEquivalentModifierMask" />
+																	<connections>
+																		<action selector="makeTextWritingDirectionLeftToRight:" target="Ady-hI-5gd" id="caW-Bv-w94" />
+																	</connections>
+																</menuItem>
+																<menuItem id="RB4-Sm-HuC">
+																	<string key="title">	Right to Left</string>
+																	<modifierMask key="keyEquivalentModifierMask" />
+																	<connections>
+																		<action selector="makeTextWritingDirectionRightToLeft:" target="Ady-hI-5gd" id="EXD-6r-ZUu" />
+																	</connections>
+																</menuItem>
+															</items>
+														</menu>
+													</menuItem>
+													<menuItem isSeparatorItem="YES" id="fKy-g9-1gm" />
+													<menuItem title="Show Ruler" id="vLm-3I-IUL">
+														<modifierMask key="keyEquivalentModifierMask" />
+														<connections>
+															<action selector="toggleRuler:" target="Ady-hI-5gd" id="FOx-HJ-KwY" />
+														</connections>
+													</menuItem>
+													<menuItem title="Copy Ruler" keyEquivalent="c" id="MkV-Pr-PK5">
+														<modifierMask key="keyEquivalentModifierMask" control="YES" command="YES" />
+														<connections>
+															<action selector="copyRuler:" target="Ady-hI-5gd" id="71i-fW-3W2" />
+														</connections>
+													</menuItem>
+													<menuItem title="Paste Ruler" keyEquivalent="v" id="LVM-kO-fVI">
+														<modifierMask key="keyEquivalentModifierMask" control="YES" command="YES" />
+														<connections>
+															<action selector="pasteRuler:" target="Ady-hI-5gd" id="cSh-wd-qM2" />
+														</connections>
+													</menuItem>
+												</items>
+											</menu>
+										</menuItem>
+									</items>
+								</menu>
+							</menuItem>
+							<menuItem title="View" id="H8h-7b-M4v">
+								<modifierMask key="keyEquivalentModifierMask" />
+								<menu key="submenu" title="View" id="HyV-fh-RgO">
+									<items>
+										<menuItem title="Show Toolbar" keyEquivalent="t" id="snW-S8-Cw5">
+											<modifierMask key="keyEquivalentModifierMask" option="YES" command="YES" />
+											<connections>
+												<action selector="toggleToolbarShown:" target="Ady-hI-5gd" id="BXY-wc-z0C" />
+											</connections>
+										</menuItem>
+										<menuItem title="Customize Toolbar…" id="1UK-8n-QPP">
+											<modifierMask key="keyEquivalentModifierMask" />
+											<connections>
+												<action selector="runToolbarCustomizationPalette:" target="Ady-hI-5gd" id="pQI-g3-MTW" />
+											</connections>
+										</menuItem>
+									</items>
+								</menu>
+							</menuItem>
+							<menuItem title="Window" id="aUF-d1-5bR">
+								<modifierMask key="keyEquivalentModifierMask" />
+								<menu key="submenu" title="Window" systemMenu="window" id="Td7-aD-5lo">
+									<items>
+										<menuItem title="Minimize" keyEquivalent="m" id="OY7-WF-poV">
+											<connections>
+												<action selector="performMiniaturize:" target="Ady-hI-5gd" id="VwT-WD-YPe" />
+											</connections>
+										</menuItem>
+										<menuItem title="Zoom" id="R4o-n2-Eq4">
+											<modifierMask key="keyEquivalentModifierMask" />
+											<connections>
+												<action selector="performZoom:" target="Ady-hI-5gd" id="DIl-cC-cCs" />
+											</connections>
+										</menuItem>
+										<menuItem isSeparatorItem="YES" id="eu3-7i-yIM" />
+										<menuItem title="Bring All to Front" id="LE2-aR-0XJ">
+											<modifierMask key="keyEquivalentModifierMask" />
+											<connections>
+												<action selector="arrangeInFront:" target="Ady-hI-5gd" id="DRN-fu-gQh" />
+											</connections>
+										</menuItem>
+									</items>
+								</menu>
+							</menuItem>
+							<menuItem title="Help" id="wpr-3q-Mcd">
+								<modifierMask key="keyEquivalentModifierMask" />
+								<menu key="submenu" title="Help" systemMenu="help" id="F2S-fz-NVQ">
+									<items>
+										<menuItem title="Facebook.Yoga.Mac.Sample Help" keyEquivalent="?" id="FKE-Sm-Kum">
+											<connections>
+												<action selector="showHelp:" target="Ady-hI-5gd" id="y7X-2Q-9no" />
+											</connections>
+										</menuItem>
+									</items>
+								</menu>
+							</menuItem>
+						</items>
+					</menu>
+					<connections>
+						<outlet property="delegate" destination="Voe-Tx-rLC" id="PrD-fu-P6m" />
+					</connections>
+				</application>
+				<customObject id="Voe-Tx-rLC" customClass="AppDelegate" customModuleProvider="" />
+				<customObject id="Ady-hI-5gd" userLabel="First Responder" customClass="NSResponder" sceneMemberID="firstResponder" />
+			</objects>
+			<point key="canvasLocation" x="75" y="0.0" />
+		</scene>
+		<!--Window Controller - Window-->
+		<scene sceneID="R2V-B0-nI4">
+			<objects>
+				<windowController id="B8D-0N-5wS" sceneMemberID="viewController">
+					<window key="window" title="Window" allowsToolTipsWhenApplicationIsInactive="NO" autorecalculatesKeyViewLoop="NO" oneShot="NO" releasedWhenClosed="NO" showsToolbarButton="NO" visibleAtLaunch="NO" animationBehavior="default" id="IQv-IB-iLA">
+						<windowStyleMask key="styleMask" titled="YES" closable="YES" miniaturizable="YES" resizable="YES" />
+						<windowPositionMask key="initialPositionMask" leftStrut="YES" rightStrut="YES" topStrut="YES" bottomStrut="YES" />
+						<rect key="contentRect" x="196" y="240" width="480" height="270" />
+						<rect key="screenRect" x="0.0" y="0.0" width="1680" height="1027" />
+					</window>
+					<connections>
+						<segue destination="XfG-lQ-9wD" kind="relationship" relationship="window.shadowedContentViewController" id="cq2-FE-JQM" />
+					</connections>
+				</windowController>
+				<customObject id="Oky-zY-oP4" userLabel="First Responder" customClass="NSResponder" sceneMemberID="firstResponder" />
+			</objects>
+			<point key="canvasLocation" x="75" y="250" />
+		</scene>
+		<!--View Controller-->
+		<scene sceneID="hIz-AP-VOD">
+			<objects>
+				<viewController id="XfG-lQ-9wD" customClass="ViewController" customModuleProvider="" sceneMemberID="viewController">
+					<view key="view" id="m2S-Jp-Qdl">
+						<rect key="frame" x="0.0" y="0.0" width="480" height="270" />
+						<autoresizingMask key="autoresizingMask" />
+					</view>
+				</viewController>
+				<customObject id="rPt-NT-nkU" userLabel="First Responder" customClass="NSResponder" sceneMemberID="firstResponder" />
+			</objects>
+			<point key="canvasLocation" x="75" y="655" />
+		</scene>
+	</scenes>
+</document>

csharp/Mac/Facebook.Yoga.Mac.Sample/ViewController.cs

@@ -0,0 +1,137 @@
+/**
+ * Copyright 2014-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the license found in the
+ * LICENSE-examples file in the root directory of this source tree.
+ */
+
+//#define DEBUG_LAYOUT
+using System;
+
+using AppKit;
+using Foundation;
+using CoreGraphics;
+
+namespace Facebook.Yoga.Mac.Sample
+{
+    public static class NSViewYogaExtensions
+    {
+        public static void ApplyYogaLayout (this NSView view, YogaNode n, bool root = true)
+        {
+#if DEBUG_LAYOUT
+            Console.WriteLine ($"ApplyYogaLayout {view.ToolTip}, {n.LayoutX}, {n.LayoutY}, {n.LayoutWidth}, {n.LayoutHeight}");
+#endif
+
+            // A bit of gross special casing
+            // This really should mostly go away if/when the UIView+Yoga.m magic gets ported to AppKit
+            if (root)
+                view.Frame = new CGRect (n.LayoutX, n.LayoutY, n.LayoutWidth, n.LayoutHeight);
+#if DEBUG_LAYOUT
+            Console.WriteLine ($"Setting {view.ToolTip} frame to {view.Frame}");
+#endif
+
+            // This assumes your YogaNode and NSView children were inserted in same order
+            for (int i = 0; i < n.Count; ++i) {
+                YogaNode childNode = n[i];
+                // Cocoa coord space is from bottom left not top left
+                view.Subviews[i].Frame = new CGRect (childNode.LayoutX, n.LayoutHeight - childNode.LayoutY - childNode.LayoutHeight, childNode.LayoutWidth, childNode.LayoutHeight);
+#if DEBUG_LAYOUT
+                Console.WriteLine ($"Setting {view.Subviews[i].ToolTip} frame to {view.Subviews[i].Frame}");
+#endif
+                if (childNode.Count > 0){
+#if DEBUG_LAYOUT
+                    Console.WriteLine ($"Calling ApplyYogaLayout recursively on {view.Subviews[i].ToolTip}");
+#endif
+                    ApplyYogaLayout (view.Subviews[i], childNode, false);
+                }
+            }
+        }
+    }
+    
+    public partial class ViewController : NSViewController
+    {
+        public ViewController(IntPtr handle) : base(handle)
+        {
+        }
+
+        public override void ViewDidLoad()
+        {
+            base.ViewDidLoad ();
+
+            NSImage image = NSImage.ImageNamed (NSImageName.TrashFull);
+
+            NSView root = CreateViewHierarchy (image);
+            var rootNode = CalculateLayout (View.Frame, image.Size);
+
+            root.ApplyYogaLayout (rootNode);
+
+            View.AddSubview (root);
+        }
+
+        static NSView CreateViewHierarchy (NSImage image)
+        {
+            var root = new NSView () {
+                WantsLayer = true,
+                ToolTip = "Root"
+            };
+            root.Layer.BackgroundColor = NSColor.Red.CGColor;
+
+            NSView child1 = new NSView () {
+                WantsLayer = true,
+                ToolTip = "Child 1"
+            };
+            child1.Layer.BackgroundColor = NSColor.Blue.CGColor;
+
+            NSView child2 = new NSView () {
+                WantsLayer = true,
+                ToolTip = "Child 2"
+            };
+            child2.Layer.BackgroundColor = NSColor.Green.CGColor;
+
+            NSView child3 = new NSView () {
+                WantsLayer = true,
+                ToolTip = "Child 3"
+            };
+            child3.Layer.BackgroundColor = NSColor.Yellow.CGColor;
+
+            root.AddSubview (child1);
+            root.AddSubview (child2);
+            child2.AddSubview (child3);
+
+            return root;
+        }
+
+        static YogaNode CalculateLayout (CGRect rootFrame, CGSize imageSize)
+        {
+            var rootNode = new YogaNode () {
+                Width = (float)rootFrame.Width,
+                Height = (float)rootFrame.Height,
+                AlignItems = YogaAlign.Center,
+                JustifyContent = YogaJustify.Center
+            };
+
+            var child1Node = new YogaNode () {
+                Width = 100,
+                Height = 100
+            };
+
+            var child2Node = new YogaNode () {
+                Width = 200,
+                Height = 100
+            };
+
+            var child3Node = new YogaNode () {
+                Width = 100,
+                Height = 100
+            };
+
+            rootNode.Insert (0, child1Node);
+            rootNode.Insert (1, child2Node);
+            child2Node.Insert (0, child3Node);
+            rootNode.CalculateLayout ();
+
+            return rootNode;
+        }
+    }
+}

csharp/Mac/Facebook.Yoga.Mac.Sample/ViewController.designer.cs

@@ -0,0 +1,18 @@
+// WARNING
+//
+// This file has been generated automatically by Xamarin Studio to store outlets and
+// actions made in the UI designer. If it is removed, they will be lost.
+// Manual changes to this file may not be handled correctly.
+//
+using Foundation;
+
+namespace Facebook.Yoga.Mac.Sample
+{
+	[Register("ViewController")]
+	partial class ViewController
+	{
+		void ReleaseDesignerOutlets()
+		{
+		}
+	}
+}