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Repeated application and alternation of Clang Format rules has lead to unfortunate block comment formatting.

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Reviewed By: SidharthGuglani

Differential Revision: D13677242

fbshipit-source-id: 3f1f5e38693eb15e9705f24fd363fc1618c78974
This commit is contained in:
David Aurelio
2019-01-16 08:39:58 -08:00
committed by Facebook Github Bot
parent 7fa0816d81
commit 71321f763a
8 changed files with 140 additions and 182 deletions
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231
yoga/Yoga.cpp
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@@ -1322,8 +1322,8 @@ static void YGNodeComputeFlexBasisForChild(
child->getResolvedDimension(YGDimensionHeight), ownerHeight),
paddingAndBorder));
} else {
// Compute the flex basis and hypothetical main size (i.e. the clamped
// flex basis).
// Compute the flex basis and hypothetical main size (i.e. the clamped flex
// basis).
childWidth = YGUndefined;
childHeight = YGUndefined;
childWidthMeasureMode = YGMeasureModeUndefined;
@@ -1351,8 +1351,8 @@ static void YGNodeComputeFlexBasisForChild(
childHeightMeasureMode = YGMeasureModeExactly;
}
// The W3C spec doesn't say anything about the 'overflow' property,
// but all major browsers appear to implement the following logic.
// The W3C spec doesn't say anything about the 'overflow' property, but all
// major browsers appear to implement the following logic.
if ((!isMainAxisRow && node->getStyle().overflow == YGOverflowScroll) ||
node->getStyle().overflow != YGOverflowScroll) {
if (YGFloatIsUndefined(childWidth) && !YGFloatIsUndefined(width)) {
@@ -1383,9 +1383,8 @@ static void YGNodeComputeFlexBasisForChild(
}
}
// If child has no defined size in the cross axis and is set to stretch,
// set the cross
// axis to be measured exactly with the available inner width
// If child has no defined size in the cross axis and is set to stretch, set
// the cross axis to be measured exactly with the available inner width
const bool hasExactWidth =
!YGFloatIsUndefined(width) && widthMode == YGMeasureModeExactly;
@@ -1484,9 +1483,8 @@ static void YGNodeAbsoluteLayoutChild(
.unwrap() +
marginRow;
} else {
// If the child doesn't have a specified width, compute the width based
// on the left/right
// offsets if they're defined.
// If the child doesn't have a specified width, compute the width based on
// the left/right offsets if they're defined.
if (child->isLeadingPositionDefined(YGFlexDirectionRow) &&
child->isTrailingPosDefined(YGFlexDirectionRow)) {
childWidth = node->getLayout().measuredDimensions[YGDimensionWidth] -
@@ -1506,9 +1504,8 @@ static void YGNodeAbsoluteLayoutChild(
.unwrap() +
marginColumn;
} else {
// If the child doesn't have a specified height, compute the height
// based on the top/bottom
// offsets if they're defined.
// If the child doesn't have a specified height, compute the height based on
// the top/bottom offsets if they're defined.
if (child->isLeadingPositionDefined(YGFlexDirectionColumn) &&
child->isTrailingPosDefined(YGFlexDirectionColumn)) {
childHeight = node->getLayout().measuredDimensions[YGDimensionHeight] -
@@ -1961,8 +1958,8 @@ static float YGNodeComputeFlexBasisForChildren(
// This function assumes that all the children of node have their
// computedFlexBasis properly computed(To do this use
// YGNodeComputeFlexBasisForChildren function).
// This function calculates YGCollectFlexItemsRowMeasurement
// YGNodeComputeFlexBasisForChildren function). This function calculates
// YGCollectFlexItemsRowMeasurement
static YGCollectFlexItemsRowValues YGCalculateCollectFlexItemsRowValues(
const YGNodeRef& node,
const YGDirection ownerDirection,
@@ -1998,10 +1995,9 @@ static YGCollectFlexItemsRowValues YGCalculateCollectFlexItemsRowValues(
mainAxisownerSize)
.unwrap();
// If this is a multi-line flow and this item pushes us over the
// available size, we've
// hit the end of the current line. Break out of the loop and lay out
// the current line.
// If this is a multi-line flow and this item pushes us over the available
// size, we've hit the end of the current line. Break out of the loop and
// lay out the current line.
if (sizeConsumedOnCurrentLineIncludingMinConstraint +
flexBasisWithMinAndMaxConstraints + childMarginMainAxis >
availableInnerMainDim &&
@@ -2276,12 +2272,10 @@ static void YGDistributeFreeSpaceFirstPass(
if (!YGFloatIsUndefined(baseMainSize) &&
!YGFloatIsUndefined(boundMainSize) &&
baseMainSize != boundMainSize) {
// By excluding this item's size and flex factor from remaining,
// this item's
// min/max constraints should also trigger in the second pass
// resulting in the
// item's size calculation being identical in the first and second
// passes.
// By excluding this item's size and flex factor from remaining, this
// item's min/max constraints should also trigger in the second pass
// resulting in the item's size calculation being identical in the
// first and second passes.
deltaFreeSpace += boundMainSize - childFlexBasis;
collectedFlexItemsValues.totalFlexShrinkScaledFactors -=
flexShrinkScaledFactor;
@@ -2307,12 +2301,10 @@ static void YGDistributeFreeSpaceFirstPass(
if (!YGFloatIsUndefined(baseMainSize) &&
!YGFloatIsUndefined(boundMainSize) &&
baseMainSize != boundMainSize) {
// By excluding this item's size and flex factor from remaining,
// this item's
// min/max constraints should also trigger in the second pass
// resulting in the
// item's size calculation being identical in the first and second
// passes.
// By excluding this item's size and flex factor from remaining, this
// item's min/max constraints should also trigger in the second pass
// resulting in the item's size calculation being identical in the
// first and second passes.
deltaFreeSpace += boundMainSize - childFlexBasis;
collectedFlexItemsValues.totalFlexGrowFactors -= flexGrowFactor;
}
@@ -2324,25 +2316,22 @@ static void YGDistributeFreeSpaceFirstPass(
// Do two passes over the flex items to figure out how to distribute the
// remaining space.
// The first pass finds the items whose min/max constraints trigger,
// freezes them at those
// sizes, and excludes those sizes from the remaining space. The second
// pass sets the size
// of each flexible item. It distributes the remaining space amongst the
// items whose min/max
// constraints didn't trigger in pass 1. For the other items, it sets
// their sizes by forcing
// their min/max constraints to trigger again.
//
// This two pass approach for resolving min/max constraints deviates from
// the spec. The
// spec (https://www.w3.org/TR/CSS-flexbox-1/#resolve-flexible-lengths)
// describes a process
// that needs to be repeated a variable number of times. The algorithm
// implemented here
// won't handle all cases but it was simpler to implement and it mitigates
// performance
// concerns because we know exactly how many passes it'll do.
// The first pass finds the items whose min/max constraints trigger, freezes
// them at those sizes, and excludes those sizes from the remaining space.
//
// The second pass sets the size of each flexible item. It distributes the
// remaining space amongst the items whose min/max constraints didn't trigger in
// the first pass. For the other items, it sets their sizes by forcing their
// min/max constraints to trigger again.
//
// This two pass approach for resolving min/max constraints deviates from the
// spec. The spec
// (https://www.w3.org/TR/CSS-flexbox-1/#resolve-flexible-lengths) describes a
// process that needs to be repeated a variable number of times. The algorithm
// implemented here won't handle all cases but it was simpler to implement and
// it mitigates performance concerns because we know exactly how many passes
// it'll do.
//
// At the end of this function the child nodes would have the proper size
// assigned to them.
@@ -2451,9 +2440,9 @@ static void YGJustifyMainAxis(
}
}
// In order to position the elements in the main axis, we have two
// controls. The space between the beginning and the first element
// and the space between each two elements.
// In order to position the elements in the main axis, we have two controls.
// The space between the beginning and the first element and the space between
// each two elements.
float leadingMainDim = 0;
float betweenMainDim = 0;
const YGJustify justifyContent = node->getStyle().justifyContent;
@@ -2512,8 +2501,8 @@ static void YGJustifyMainAxis(
child->isLeadingPositionDefined(mainAxis)) {
if (performLayout) {
// In case the child is position absolute and has left/top being
// defined, we override the position to whatever the user said
// (and margin/border).
// defined, we override the position to whatever the user said (and
// margin/border).
child->setLayoutPosition(
child->getLeadingPosition(mainAxis, availableInnerMainDim)
.unwrap() +
@@ -2523,8 +2512,8 @@ static void YGJustifyMainAxis(
}
} else {
// Now that we placed the element, we need to update the variables.
// We need to do that only for relative elements. Absolute elements
// do not take part in that phase.
// We need to do that only for relative elements. Absolute elements do not
// take part in that phase.
if (childStyle.positionType == YGPositionTypeRelative) {
if (child->marginLeadingValue(mainAxis).unit == YGUnitAuto) {
collectedFlexItemsValues.mainDim +=
@@ -2547,9 +2536,8 @@ static void YGJustifyMainAxis(
bool canSkipFlex =
!performLayout && measureModeCrossDim == YGMeasureModeExactly;
if (canSkipFlex) {
// If we skipped the flex step, then we can't rely on the
// measuredDims because
// they weren't computed. This means we can't call
// If we skipped the flex step, then we can't rely on the measuredDims
// because they weren't computed. This means we can't call
// YGNodeDimWithMargin.
collectedFlexItemsValues.mainDim += betweenMainDim +
child->getMarginForAxis(mainAxis, availableInnerWidth).unwrap() +
@@ -2608,81 +2596,61 @@ static void YGJustifyMainAxis(
//
// This is the main routine that implements a subset of the flexbox layout
// algorithm
// described in the W3C YG documentation: https://www.w3.org/TR/CSS3-flexbox/.
// algorithm described in the W3C CSS documentation:
// https://www.w3.org/TR/CSS3-flexbox/.
//
// Limitations of this algorithm, compared to the full standard:
// * Display property is always assumed to be 'flex' except for Text nodes,
// which
// are assumed to be 'inline-flex'.
// which are assumed to be 'inline-flex'.
// * The 'zIndex' property (or any form of z ordering) is not supported. Nodes
// are
// stacked in document order.
// are stacked in document order.
// * The 'order' property is not supported. The order of flex items is always
// defined
// by document order.
// defined by document order.
// * The 'visibility' property is always assumed to be 'visible'. Values of
// 'collapse'
// and 'hidden' are not supported.
// 'collapse' and 'hidden' are not supported.
// * There is no support for forced breaks.
// * It does not support vertical inline directions (top-to-bottom or
// bottom-to-top text).
// bottom-to-top text).
//
// Deviations from standard:
// * Section 4.5 of the spec indicates that all flex items have a default
// minimum
// main size. For text blocks, for example, this is the width of the widest
// word.
// Calculating the minimum width is expensive, so we forego it and assume a
// default
// minimum main size of 0.
// minimum main size. For text blocks, for example, this is the width of the
// widest word. Calculating the minimum width is expensive, so we forego it
// and assume a default minimum main size of 0.
// * Min/Max sizes in the main axis are not honored when resolving flexible
// lengths.
// lengths.
// * The spec indicates that the default value for 'flexDirection' is 'row',
// but
// the algorithm below assumes a default of 'column'.
// but the algorithm below assumes a default of 'column'.
//
// Input parameters:
// - node: current node to be sized and layed out
// - availableWidth & availableHeight: available size to be used for sizing
// the node
// or YGUndefined if the size is not available; interpretation depends on
// layout
// flags
// the node or YGUndefined if the size is not available; interpretation
// depends on layout flags
// - ownerDirection: the inline (text) direction within the owner
// (left-to-right or
// right-to-left)
// (left-to-right or right-to-left)
// - widthMeasureMode: indicates the sizing rules for the width (see below
// for explanation)
// for explanation)
// - heightMeasureMode: indicates the sizing rules for the height (see below
// for explanation)
// for explanation)
// - performLayout: specifies whether the caller is interested in just the
// dimensions
// of the node or it requires the entire node and its subtree to be layed
// out
// (with final positions)
// dimensions of the node or it requires the entire node and its subtree to
// be layed out (with final positions)
//
// Details:
// This routine is called recursively to lay out subtrees of flexbox
// elements. It uses the
// information in node.style, which is treated as a read-only input. It is
// responsible for
// setting the layout.direction and layout.measuredDimensions fields for the
// input node as well
// as the layout.position and layout.lineIndex fields for its child nodes.
// The
// elements. It uses the information in node.style, which is treated as a
// read-only input. It is responsible for setting the layout.direction and
// layout.measuredDimensions fields for the input node as well as the
// layout.position and layout.lineIndex fields for its child nodes. The
// layout.measuredDimensions field includes any border or padding for the
// node but does
// not include margins.
// node but does not include margins.
//
// The spec describes four different layout modes: "fill available", "max
// content", "min
// content",
// and "fit content". Of these, we don't use "min content" because we don't
// support default
// minimum main sizes (see above for details). Each of our measure modes maps
// to a layout mode
// from the spec (https://www.w3.org/TR/CSS3-sizing/#terms):
// content", "min content", and "fit content". Of these, we don't use "min
// content" because we don't support default minimum main sizes (see above
// for details). Each of our measure modes maps to a layout mode from the
// spec (https://www.w3.org/TR/CSS3-sizing/#terms):
// - YGMeasureModeUndefined: max content
// - YGMeasureModeExactly: fill available
// - YGMeasureModeAtMost: fit content
@@ -2924,9 +2892,9 @@ static void YGNodelayoutImpl(
!performLayout && measureModeCrossDim == YGMeasureModeExactly;
// STEP 5: RESOLVING FLEXIBLE LENGTHS ON MAIN AXIS
// Calculate the remaining available space that needs to be allocated.
// If the main dimension size isn't known, it is computed based on
// the line length, so there's no more space left to distribute.
// Calculate the remaining available space that needs to be allocated. If
// the main dimension size isn't known, it is computed based on the line
// length, so there's no more space left to distribute.
bool sizeBasedOnContent = false;
// If we don't measure with exact main dimension we want to ensure we don't
@@ -2998,11 +2966,9 @@ static void YGNodelayoutImpl(
// STEP 6: MAIN-AXIS JUSTIFICATION & CROSS-AXIS SIZE DETERMINATION
// At this point, all the children have their dimensions set in the main
// axis.
// Their dimensions are also set in the cross axis with the exception of
// items
// that are aligned "stretch". We need to compute these stretch values and
// set the final positions.
// axis. Their dimensions are also set in the cross axis with the exception
// of items that are aligned "stretch". We need to compute these stretch
// values and set the final positions.
YGJustifyMainAxis(
node,
@@ -3058,8 +3024,8 @@ static void YGNodelayoutImpl(
}
if (child->getStyle().positionType == YGPositionTypeAbsolute) {
// If the child is absolutely positioned and has a
// top/left/bottom/right set, override
// all the previously computed positions to set it correctly.
// top/left/bottom/right set, override all the previously computed
// positions to set it correctly.
const bool isChildLeadingPosDefined =
child->isLeadingPositionDefined(crossAxis);
if (isChildLeadingPosDefined) {
@@ -3090,9 +3056,8 @@ static void YGNodelayoutImpl(
const YGAlign alignItem = YGNodeAlignItem(node, child);
// If the child uses align stretch, we need to lay it out one more
// time, this time
// forcing the cross-axis size to be the computed cross size for the
// current line.
// time, this time forcing the cross-axis size to be the computed
// cross size for the current line.
if (alignItem == YGAlignStretch &&
child->marginLeadingValue(crossAxis).unit != YGUnitAuto &&
child->marginTrailingValue(crossAxis).unit != YGUnitAuto) {
@@ -3713,8 +3678,8 @@ bool YGNodeCanUseCachedMeasurement(
}
//
// This is a wrapper around the YGNodelayoutImpl function. It determines
// whether the layout request is redundant and can be skipped.
// This is a wrapper around the YGNodelayoutImpl function. It determines whether
// the layout request is redundant and can be skipped.
//
// Parameters:
// Input parameters are the same as YGNodelayoutImpl (see above)
@@ -3753,16 +3718,12 @@ bool YGLayoutNodeInternal(
// Determine whether the results are already cached. We maintain a separate
// cache for layouts and measurements. A layout operation modifies the
// positions
// and dimensions for nodes in the subtree. The algorithm assumes that each
// node
// gets layed out a maximum of one time per tree layout, but multiple
// measurements
// may be required to resolve all of the flex dimensions.
// We handle nodes with measure functions specially here because they are the
// most
// expensive to measure, so it's worth avoiding redundant measurements if at
// all possible.
// positions and dimensions for nodes in the subtree. The algorithm assumes
// that each node gets layed out a maximum of one time per tree layout, but
// multiple measurements may be required to resolve all of the flex
// dimensions. We handle nodes with measure functions specially here because
// they are the most expensive to measure, so it's worth avoiding redundant
// measurements if at all possible.
if (node->getMeasure() != nullptr) {
const float marginAxisRow =
node->getMarginForAxis(YGFlexDirectionRow, ownerWidth).unwrap();
@@ -4058,10 +4019,8 @@ void YGNodeCalculateLayout(
const float ownerHeight,
const YGDirection ownerDirection) {
// Increment the generation count. This will force the recursive routine to
// visit
// all dirty nodes at least once. Subsequent visits will be skipped if the
// input
// parameters don't change.
// visit all dirty nodes at least once. Subsequent visits will be skipped if
// the input parameters don't change.
gCurrentGenerationCount++;
node->resolveDimension();
float width = YGUndefined;