349 lines
11 KiB
C++
349 lines
11 KiB
C++
/*
|
|
* 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.
|
|
*/
|
|
|
|
#pragma once
|
|
|
|
#ifdef __cplusplus
|
|
|
|
#include <cstdint>
|
|
#include <stdio.h>
|
|
#include "BitUtils.h"
|
|
#include "CompactValue.h"
|
|
#include "YGConfig.h"
|
|
#include "YGLayout.h"
|
|
#include "YGStyle.h"
|
|
#include "YGMacros.h"
|
|
#include "Yoga-internal.h"
|
|
|
|
YGConfigRef YGConfigGetDefault();
|
|
|
|
struct YOGA_EXPORT YGNode {
|
|
using MeasureWithContextFn =
|
|
YGSize (*)(YGNode*, float, YGMeasureMode, float, YGMeasureMode, void*);
|
|
using BaselineWithContextFn = float (*)(YGNode*, float, float, void*);
|
|
using PrintWithContextFn = void (*)(YGNode*, void*);
|
|
|
|
private:
|
|
static constexpr size_t hasNewLayout_ = 0;
|
|
static constexpr size_t isReferenceBaseline_ = 1;
|
|
static constexpr size_t isDirty_ = 2;
|
|
static constexpr size_t nodeType_ = 3;
|
|
static constexpr size_t measureUsesContext_ = 4;
|
|
static constexpr size_t baselineUsesContext_ = 5;
|
|
static constexpr size_t printUsesContext_ = 6;
|
|
static constexpr size_t useWebDefaults_ = 7;
|
|
|
|
void* context_ = nullptr;
|
|
uint8_t flags = 1;
|
|
uint8_t reserved_ = 0;
|
|
union {
|
|
YGMeasureFunc noContext;
|
|
MeasureWithContextFn withContext;
|
|
} measure_ = {nullptr};
|
|
union {
|
|
YGBaselineFunc noContext;
|
|
BaselineWithContextFn withContext;
|
|
} baseline_ = {nullptr};
|
|
union {
|
|
YGPrintFunc noContext;
|
|
PrintWithContextFn withContext;
|
|
} print_ = {nullptr};
|
|
YGDirtiedFunc dirtied_ = nullptr;
|
|
YGStyle style_ = {};
|
|
YGLayout layout_ = {};
|
|
uint32_t lineIndex_ = 0;
|
|
YGNodeRef owner_ = nullptr;
|
|
YGVector children_ = {};
|
|
YGConfigRef config_;
|
|
std::array<YGValue, 2> resolvedDimensions_ = {
|
|
{YGValueUndefined, YGValueUndefined}};
|
|
|
|
YGFloatOptional relativePosition(
|
|
const YGFlexDirection axis,
|
|
const float axisSize) const;
|
|
|
|
void setMeasureFunc(decltype(measure_));
|
|
void setBaselineFunc(decltype(baseline_));
|
|
|
|
void useWebDefaults() {
|
|
facebook::yoga::detail::setBooleanData(flags, useWebDefaults_, true);
|
|
style_.flexDirection() = YGFlexDirectionRow;
|
|
style_.alignContent() = YGAlignStretch;
|
|
}
|
|
|
|
// DANGER DANGER DANGER!
|
|
// If the node assigned to has children, we'd either have to deallocate
|
|
// them (potentially incorrect) or ignore them (danger of leaks). Only ever
|
|
// use this after checking that there are no children.
|
|
// DO NOT CHANGE THE VISIBILITY OF THIS METHOD!
|
|
YGNode& operator=(YGNode&&) = default;
|
|
|
|
using CompactValue = facebook::yoga::detail::CompactValue;
|
|
|
|
public:
|
|
YGNode() : YGNode{YGConfigGetDefault()} {}
|
|
explicit YGNode(const YGConfigRef config) : config_{config} {
|
|
if (config->useWebDefaults) {
|
|
useWebDefaults();
|
|
}
|
|
};
|
|
~YGNode() = default; // cleanup of owner/children relationships in YGNodeFree
|
|
|
|
YGNode(YGNode&&);
|
|
|
|
// Does not expose true value semantics, as children are not cloned eagerly.
|
|
// Should we remove this?
|
|
YGNode(const YGNode& node) = default;
|
|
|
|
// for RB fabric
|
|
YGNode(const YGNode& node, YGConfigRef config);
|
|
|
|
// assignment means potential leaks of existing children, or alternatively
|
|
// freeing unowned memory, double free, or freeing stack memory.
|
|
YGNode& operator=(const YGNode&) = delete;
|
|
|
|
// Getters
|
|
void* getContext() const { return context_; }
|
|
|
|
uint8_t& reserved() { return reserved_; }
|
|
uint8_t reserved() const { return reserved_; }
|
|
|
|
void print(void*);
|
|
|
|
bool getHasNewLayout() const {
|
|
return facebook::yoga::detail::getBooleanData(flags, hasNewLayout_);
|
|
}
|
|
|
|
YGNodeType getNodeType() const {
|
|
return facebook::yoga::detail::getEnumData<YGNodeType>(flags, nodeType_);
|
|
}
|
|
|
|
bool hasMeasureFunc() const noexcept { return measure_.noContext != nullptr; }
|
|
|
|
YGSize measure(float, YGMeasureMode, float, YGMeasureMode, void*);
|
|
|
|
bool hasBaselineFunc() const noexcept {
|
|
return baseline_.noContext != nullptr;
|
|
}
|
|
|
|
float baseline(float width, float height, void* layoutContext);
|
|
|
|
YGDirtiedFunc getDirtied() const { return dirtied_; }
|
|
|
|
// For Performance reasons passing as reference.
|
|
YGStyle& getStyle() { return style_; }
|
|
|
|
const YGStyle& getStyle() const { return style_; }
|
|
|
|
// For Performance reasons passing as reference.
|
|
YGLayout& getLayout() { return layout_; }
|
|
|
|
const YGLayout& getLayout() const { return layout_; }
|
|
|
|
uint32_t getLineIndex() const { return lineIndex_; }
|
|
|
|
bool isReferenceBaseline() {
|
|
return facebook::yoga::detail::getBooleanData(flags, isReferenceBaseline_);
|
|
}
|
|
|
|
// returns the YGNodeRef that owns this YGNode. An owner is used to identify
|
|
// the YogaTree that a YGNode belongs to. This method will return the parent
|
|
// of the YGNode when a YGNode only belongs to one YogaTree or nullptr when
|
|
// the YGNode is shared between two or more YogaTrees.
|
|
YGNodeRef getOwner() const { return owner_; }
|
|
|
|
// Deprecated, use getOwner() instead.
|
|
YGNodeRef getParent() const { return getOwner(); }
|
|
|
|
const YGVector& getChildren() const { return children_; }
|
|
|
|
// Applies a callback to all children, after cloning them if they are not
|
|
// owned.
|
|
template <typename T>
|
|
void iterChildrenAfterCloningIfNeeded(T callback, void* cloneContext) {
|
|
int i = 0;
|
|
for (YGNodeRef& child : children_) {
|
|
if (child->getOwner() != this) {
|
|
child = config_->cloneNode(child, this, i, cloneContext);
|
|
child->setOwner(this);
|
|
}
|
|
i += 1;
|
|
|
|
callback(child, cloneContext);
|
|
}
|
|
}
|
|
|
|
YGNodeRef getChild(uint32_t index) const { return children_.at(index); }
|
|
|
|
YGConfigRef getConfig() const { return config_; }
|
|
|
|
bool isDirty() const {
|
|
return facebook::yoga::detail::getBooleanData(flags, isDirty_);
|
|
}
|
|
|
|
std::array<YGValue, 2> getResolvedDimensions() const {
|
|
return resolvedDimensions_;
|
|
}
|
|
|
|
YGValue getResolvedDimension(int index) const {
|
|
return resolvedDimensions_[index];
|
|
}
|
|
|
|
static CompactValue computeEdgeValueForColumn(
|
|
const YGStyle::Edges& edges,
|
|
YGEdge edge,
|
|
CompactValue defaultValue);
|
|
|
|
static CompactValue computeEdgeValueForRow(
|
|
const YGStyle::Edges& edges,
|
|
YGEdge rowEdge,
|
|
YGEdge edge,
|
|
CompactValue defaultValue);
|
|
|
|
// Methods related to positions, margin, padding and border
|
|
YGFloatOptional getLeadingPosition(
|
|
const YGFlexDirection axis,
|
|
const float axisSize) const;
|
|
bool isLeadingPositionDefined(const YGFlexDirection axis) const;
|
|
bool isTrailingPosDefined(const YGFlexDirection axis) const;
|
|
YGFloatOptional getTrailingPosition(
|
|
const YGFlexDirection axis,
|
|
const float axisSize) const;
|
|
YGFloatOptional getLeadingMargin(
|
|
const YGFlexDirection axis,
|
|
const float widthSize) const;
|
|
YGFloatOptional getTrailingMargin(
|
|
const YGFlexDirection axis,
|
|
const float widthSize) const;
|
|
float getLeadingBorder(const YGFlexDirection flexDirection) const;
|
|
float getTrailingBorder(const YGFlexDirection flexDirection) const;
|
|
YGFloatOptional getLeadingPadding(
|
|
const YGFlexDirection axis,
|
|
const float widthSize) const;
|
|
YGFloatOptional getTrailingPadding(
|
|
const YGFlexDirection axis,
|
|
const float widthSize) const;
|
|
YGFloatOptional getLeadingPaddingAndBorder(
|
|
const YGFlexDirection axis,
|
|
const float widthSize) const;
|
|
YGFloatOptional getTrailingPaddingAndBorder(
|
|
const YGFlexDirection axis,
|
|
const float widthSize) const;
|
|
YGFloatOptional getMarginForAxis(
|
|
const YGFlexDirection axis,
|
|
const float widthSize) const;
|
|
// Setters
|
|
|
|
void setContext(void* context) { context_ = context; }
|
|
|
|
void setPrintFunc(YGPrintFunc printFunc) {
|
|
print_.noContext = printFunc;
|
|
facebook::yoga::detail::setBooleanData(flags, printUsesContext_, false);
|
|
}
|
|
void setPrintFunc(PrintWithContextFn printFunc) {
|
|
print_.withContext = printFunc;
|
|
facebook::yoga::detail::setBooleanData(flags, printUsesContext_, true);
|
|
}
|
|
void setPrintFunc(std::nullptr_t) { setPrintFunc(YGPrintFunc{nullptr}); }
|
|
|
|
void setHasNewLayout(bool hasNewLayout) {
|
|
facebook::yoga::detail::setBooleanData(flags, hasNewLayout_, hasNewLayout);
|
|
}
|
|
|
|
void setNodeType(YGNodeType nodeType) {
|
|
return facebook::yoga::detail::setEnumData<YGNodeType>(
|
|
flags, nodeType_, nodeType);
|
|
}
|
|
|
|
void setMeasureFunc(YGMeasureFunc measureFunc);
|
|
void setMeasureFunc(MeasureWithContextFn);
|
|
void setMeasureFunc(std::nullptr_t) {
|
|
return setMeasureFunc(YGMeasureFunc{nullptr});
|
|
}
|
|
|
|
void setBaselineFunc(YGBaselineFunc baseLineFunc) {
|
|
facebook::yoga::detail::setBooleanData(flags, baselineUsesContext_, false);
|
|
baseline_.noContext = baseLineFunc;
|
|
}
|
|
void setBaselineFunc(BaselineWithContextFn baseLineFunc) {
|
|
facebook::yoga::detail::setBooleanData(flags, baselineUsesContext_, true);
|
|
baseline_.withContext = baseLineFunc;
|
|
}
|
|
void setBaselineFunc(std::nullptr_t) {
|
|
return setBaselineFunc(YGBaselineFunc{nullptr});
|
|
}
|
|
|
|
void setDirtiedFunc(YGDirtiedFunc dirtiedFunc) { dirtied_ = dirtiedFunc; }
|
|
|
|
void setStyle(const YGStyle& style) { style_ = style; }
|
|
|
|
void setLayout(const YGLayout& layout) { layout_ = layout; }
|
|
|
|
void setLineIndex(uint32_t lineIndex) { lineIndex_ = lineIndex; }
|
|
|
|
void setIsReferenceBaseline(bool isReferenceBaseline) {
|
|
facebook::yoga::detail::setBooleanData(
|
|
flags, isReferenceBaseline_, isReferenceBaseline);
|
|
}
|
|
|
|
void setOwner(YGNodeRef owner) { owner_ = owner; }
|
|
|
|
void setChildren(const YGVector& children) { children_ = children; }
|
|
|
|
// TODO: rvalue override for setChildren
|
|
|
|
YG_DEPRECATED void setConfig(YGConfigRef config) { config_ = config; }
|
|
|
|
void setDirty(bool isDirty);
|
|
void setLayoutLastOwnerDirection(YGDirection direction);
|
|
void setLayoutComputedFlexBasis(const YGFloatOptional computedFlexBasis);
|
|
void setLayoutComputedFlexBasisGeneration(
|
|
uint32_t computedFlexBasisGeneration);
|
|
void setLayoutMeasuredDimension(float measuredDimension, int index);
|
|
void setLayoutHadOverflow(bool hadOverflow);
|
|
void setLayoutDimension(float dimension, int index);
|
|
void setLayoutDirection(YGDirection direction);
|
|
void setLayoutMargin(float margin, int index);
|
|
void setLayoutBorder(float border, int index);
|
|
void setLayoutPadding(float padding, int index);
|
|
void setLayoutPosition(float position, int index);
|
|
void setPosition(
|
|
const YGDirection direction,
|
|
const float mainSize,
|
|
const float crossSize,
|
|
const float ownerWidth);
|
|
void setLayoutDoesLegacyFlagAffectsLayout(bool doesLegacyFlagAffectsLayout);
|
|
void setLayoutDidUseLegacyFlag(bool didUseLegacyFlag);
|
|
void markDirtyAndPropogateDownwards();
|
|
|
|
// Other methods
|
|
YGValue marginLeadingValue(const YGFlexDirection axis) const;
|
|
YGValue marginTrailingValue(const YGFlexDirection axis) const;
|
|
YGValue resolveFlexBasisPtr() const;
|
|
void resolveDimension();
|
|
YGDirection resolveDirection(const YGDirection ownerDirection);
|
|
void clearChildren();
|
|
/// Replaces the occurrences of oldChild with newChild
|
|
void replaceChild(YGNodeRef oldChild, YGNodeRef newChild);
|
|
void replaceChild(YGNodeRef child, uint32_t index);
|
|
void insertChild(YGNodeRef child, uint32_t index);
|
|
/// Removes the first occurrence of child
|
|
bool removeChild(YGNodeRef child);
|
|
void removeChild(uint32_t index);
|
|
|
|
void cloneChildrenIfNeeded(void*);
|
|
void markDirtyAndPropogate();
|
|
float resolveFlexGrow() const;
|
|
float resolveFlexShrink() const;
|
|
bool isNodeFlexible();
|
|
bool didUseLegacyFlag();
|
|
bool isLayoutTreeEqualToNode(const YGNode& node) const;
|
|
void reset();
|
|
};
|
|
|
|
#endif
|