yoga/java/jni/YGJNIVanilla.cpp

/*
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the LICENSE
 * file in the root directory of this source tree.
 */
#include "jni.h"
#include "YGJNIVanilla.h"
#include <yoga/YGNode.h>

static inline YGNodeRef _jlong2YGNodeRef(jlong addr) {
  return reinterpret_cast<YGNodeRef>(static_cast<intptr_t>(addr));
}

#define YG_NODE_JNI_STYLE_PROP(javatype, type, name)                         \
  static javatype jni_YGNodeStyleGet##name##JNI(                             \
      JNIEnv* env, jobject obj, jlong nativePointer) {                       \
    return (javatype) YGNodeStyleGet##name(_jlong2YGNodeRef(nativePointer)); \
  }                                                                          \
                                                                             \
  static void jni_YGNodeStyleSet##name##JNI(                                 \
      JNIEnv* env, jobject obj, jlong nativePointer, javatype value) {       \
    YGNodeStyleSet##name(                                                    \
        _jlong2YGNodeRef(nativePointer), static_cast<type>(value));          \
  }

YG_NODE_JNI_STYLE_PROP(jint, YGDirection, Direction);
YG_NODE_JNI_STYLE_PROP(jint, YGFlexDirection, FlexDirection);
YG_NODE_JNI_STYLE_PROP(jint, YGJustify, JustifyContent);
YG_NODE_JNI_STYLE_PROP(jint, YGAlign, AlignItems);
YG_NODE_JNI_STYLE_PROP(jint, YGAlign, AlignSelf);
YG_NODE_JNI_STYLE_PROP(jint, YGAlign, AlignContent);
YG_NODE_JNI_STYLE_PROP(jint, YGPositionType, PositionType);
YG_NODE_JNI_STYLE_PROP(jint, YGWrap, FlexWrap);
YG_NODE_JNI_STYLE_PROP(jint, YGOverflow, Overflow);
YG_NODE_JNI_STYLE_PROP(jint, YGDisplay, Display);
YG_NODE_JNI_STYLE_PROP(jfloat, float, Flex);
YG_NODE_JNI_STYLE_PROP(jfloat, float, FlexGrow);
YG_NODE_JNI_STYLE_PROP(jfloat, float, FlexShrink);

// Yoga specific properties, not compatible with flexbox specification
YG_NODE_JNI_STYLE_PROP(jfloat, float, AspectRatio);

void assertNoPendingJniException(JNIEnv* env) {
  // This method cannot call any other method of the library, since other
  // methods of the library use it to check for exceptions too
  if (env->ExceptionCheck()) {
    env->ExceptionDescribe();
  }
}

void registerNativeMethods(
    JNIEnv* env,
    const char* className,
    JNINativeMethod methods[],
    size_t numMethods) {
  jclass clazz = env->FindClass(className);

  assertNoPendingJniException(env);

  env->RegisterNatives(clazz, methods, numMethods);

  assertNoPendingJniException(env);
}

static JNINativeMethod methods[] = {
    {"jni_YGNodeStyleGetDirectionJNI",
     "(J)I",
     (void*) jni_YGNodeStyleGetDirectionJNI},
    {"jni_YGNodeStyleSetDirectionJNI",
     "(JI)V",
     (void*) jni_YGNodeStyleSetDirectionJNI},
    {"jni_YGNodeStyleGetFlexDirectionJNI",
     "(J)I",
     (void*) jni_YGNodeStyleGetFlexDirectionJNI},
    {"jni_YGNodeStyleSetFlexDirectionJNI",
     "(JI)V",
     (void*) jni_YGNodeStyleSetFlexDirectionJNI},
    {"jni_YGNodeStyleGetJustifyContentJNI",
     "(J)I",
     (void*) jni_YGNodeStyleGetJustifyContentJNI},
    {"jni_YGNodeStyleSetJustifyContentJNI",
     "(JI)V",
     (void*) jni_YGNodeStyleSetJustifyContentJNI},
    {"jni_YGNodeStyleGetAlignItemsJNI",
     "(J)I",
     (void*) jni_YGNodeStyleGetAlignItemsJNI},
    {"jni_YGNodeStyleSetAlignItemsJNI",
     "(JI)V",
     (void*) jni_YGNodeStyleSetAlignItemsJNI},
    {"jni_YGNodeStyleGetAlignSelfJNI",
     "(J)I",
     (void*) jni_YGNodeStyleGetAlignSelfJNI},
    {"jni_YGNodeStyleSetAlignSelfJNI",
     "(JI)V",
     (void*) jni_YGNodeStyleSetAlignSelfJNI},
    {"jni_YGNodeStyleGetAlignContentJNI",
     "(J)I",
     (void*) jni_YGNodeStyleGetAlignContentJNI},
    {"jni_YGNodeStyleSetAlignContentJNI",
     "(JI)V",
     (void*) jni_YGNodeStyleSetAlignContentJNI},
    {"jni_YGNodeStyleGetPositionTypeJNI",
     "(J)I",
     (void*) jni_YGNodeStyleGetPositionTypeJNI},
    {"jni_YGNodeStyleSetPositionTypeJNI",
     "(JI)V",
     (void*) jni_YGNodeStyleSetPositionTypeJNI},
    {"jni_YGNodeStyleGetFlexWrapJNI",
     "(J)I",
     (void*) jni_YGNodeStyleGetFlexWrapJNI},
    {"jni_YGNodeStyleSetFlexWrapJNI",
     "(JI)V",
     (void*) jni_YGNodeStyleSetFlexWrapJNI},
    {"jni_YGNodeStyleGetOverflowJNI",
     "(J)I",
     (void*) jni_YGNodeStyleGetOverflowJNI},
    {"jni_YGNodeStyleSetOverflowJNI",
     "(JI)V",
     (void*) jni_YGNodeStyleSetOverflowJNI},
    {"jni_YGNodeStyleGetDisplayJNI",
     "(J)I",
     (void*) jni_YGNodeStyleGetDisplayJNI},
    {"jni_YGNodeStyleSetDisplayJNI",
     "(JI)V",
     (void*) jni_YGNodeStyleSetDisplayJNI},
    {"jni_YGNodeStyleGetFlexJNI", "(J)F", (void*) jni_YGNodeStyleGetFlexJNI},
    {"jni_YGNodeStyleSetFlexJNI", "(JF)V", (void*) jni_YGNodeStyleSetFlexJNI},
    {"jni_YGNodeStyleGetFlexGrowJNI",
     "(J)F",
     (void*) jni_YGNodeStyleGetFlexGrowJNI},
    {"jni_YGNodeStyleSetFlexGrowJNI",
     "(JF)V",
     (void*) jni_YGNodeStyleSetFlexGrowJNI},
    {"jni_YGNodeStyleGetFlexShrinkJNI",
     "(J)F",
     (void*) jni_YGNodeStyleGetFlexShrinkJNI},
    {"jni_YGNodeStyleSetFlexShrinkJNI",
     "(JF)V",
     (void*) jni_YGNodeStyleSetFlexShrinkJNI},
    {"jni_YGNodeStyleGetAspectRatioJNI",
     "(J)F",
     (void*) jni_YGNodeStyleGetAspectRatioJNI},
    {"jni_YGNodeStyleSetAspectRatioJNI",
     "(JF)V",
     (void*) jni_YGNodeStyleSetAspectRatioJNI},
};

void YGJNIVanilla::registerNatives(JNIEnv* env) {
  registerNativeMethods(
      env,
      "com/facebook/yoga/YogaNative",
      methods,
      sizeof(methods) / sizeof(JNINativeMethod));
}