Modify private apis to set, store, and get intrinsic sizing keywords (facebook#1721)

Summary:

X-link: facebook/react-native#46938

The private internals of how we store styles needed to change a bit to support 3 new keyword values. Right now the only other keyword that can be stored is `auto`. As a result there isn't much fancy logic to support storing this and its just stored as a specific type inside of `StyleValueHandle`. There are only 3 bits for types (8 values), so it is not sustainable to just stuff every keyword in there. So the change writes the keyword as a value with a new `keyword` `Type`. 

I chose not to put `auto` in there even though it is a keyword since it is a hot path, I did not want to regress perf when I did not need to.

I also make a new `StyleSizeValue` class to store size values - so values for `width`, `height`, etc. This way these new keywords are kept specific to sizes and we will not be able to create, for example, a margin: `max-content`.

Differential Revision: D63927512

Author: joevilches

enums.py

@@ -8,7 +8,15 @@
 
 ENUMS = {
     "Direction": ["Inherit", "LTR", "RTL"],
-    "Unit": ["Undefined", "Point", "Percent", "Auto"],
+    "Unit": [
+        "Undefined",
+        "Point",
+        "Percent",
+        "Auto",
+        "MaxContent",
+        "FitContent",
+        "Stretch",
+    ],
     "FlexDirection": ["Column", "ColumnReverse", "Row", "RowReverse"],
     "Justify": [
         "FlexStart",

java/com/facebook/yoga/YogaUnit.java

@@ -13,7 +13,10 @@ public enum YogaUnit {
   UNDEFINED(0),
   POINT(1),
   PERCENT(2),
-  AUTO(3);
+  AUTO(3),
+  MAX_CONTENT(4),
+  FIT_CONTENT(5),
+  STRETCH(6);
 
   private final int mIntValue;
 
@@ -31,6 +34,9 @@ public static YogaUnit fromInt(int value) {
       case 1: return POINT;
       case 2: return PERCENT;
       case 3: return AUTO;
+      case 4: return MAX_CONTENT;
+      case 5: return FIT_CONTENT;
+      case 6: return STRETCH;
       default: throw new IllegalArgumentException("Unknown enum value: " + value);
     }
   }

javascript/src/generated/YGEnums.ts

@@ -124,6 +124,9 @@ export enum Unit {
   Point = 1,
   Percent = 2,
   Auto = 3,
+  MaxContent = 4,
+  FitContent = 5,
+  Stretch = 6,
 }
 
 export enum Wrap {
@@ -201,6 +204,9 @@ const constants = {
   UNIT_POINT: Unit.Point,
   UNIT_PERCENT: Unit.Percent,
   UNIT_AUTO: Unit.Auto,
+  UNIT_MAX_CONTENT: Unit.MaxContent,
+  UNIT_FIT_CONTENT: Unit.FitContent,
+  UNIT_STRETCH: Unit.Stretch,
   WRAP_NO_WRAP: Wrap.NoWrap,
   WRAP_WRAP: Wrap.Wrap,
   WRAP_WRAP_REVERSE: Wrap.WrapReverse,

tests/StyleValuePoolTest.cpp

@@ -128,4 +128,19 @@ TEST(StyleValuePool, store_undefined_after_large_int) {
   EXPECT_EQ(pool.getLength(handle), StyleLength::undefined());
 }
 
+TEST(StyleValuePool, store_keywords) {
+  StyleValuePool pool;
+  StyleValueHandle handleMaxContent;
+  StyleValueHandle handleFitContent;
+  StyleValueHandle handleStretch;
+
+  pool.store(handleMaxContent, StyleSizeValue::ofMaxContent());
+  pool.store(handleFitContent, StyleSizeValue::ofFitContent());
+  pool.store(handleStretch, StyleSizeValue::ofStretch());
+
+  EXPECT_EQ(pool.getSize(handleMaxContent), StyleSizeValue::ofMaxContent());
+  EXPECT_EQ(pool.getSize(handleFitContent), StyleSizeValue::ofFitContent());
+  EXPECT_EQ(pool.getSize(handleStretch), StyleSizeValue::ofStretch());
+}
+
 } // namespace facebook::yoga

yoga/YGEnums.cpp

@@ -243,6 +243,12 @@ const char* YGUnitToString(const YGUnit value) {
       return "percent";
     case YGUnitAuto:
       return "auto";
+    case YGUnitMaxContent:
+      return "max-content";
+    case YGUnitFitContent:
+      return "fit-content";
+    case YGUnitStretch:
+      return "stretch";
   }
   return "unknown";
 }

yoga/YGEnums.h

@@ -130,7 +130,10 @@ YG_ENUM_DECL(
     YGUnitUndefined,
     YGUnitPoint,
     YGUnitPercent,
-    YGUnitAuto)
+    YGUnitAuto,
+    YGUnitMaxContent,
+    YGUnitFitContent,
+    YGUnitStretch)
 
 YG_ENUM_DECL(
     YGWrap,

yoga/YGNodeStyle.cpp

@@ -177,19 +177,19 @@ float YGNodeStyleGetFlexShrink(const YGNodeConstRef nodeRef) {
 
 void YGNodeStyleSetFlexBasis(const YGNodeRef node, const float flexBasis) {
   updateStyle<&Style::flexBasis, &Style::setFlexBasis>(
-      node, StyleLength::points(flexBasis));
+      node, StyleSizeValue::points(flexBasis));
 }
 
 void YGNodeStyleSetFlexBasisPercent(
     const YGNodeRef node,
     const float flexBasisPercent) {
   updateStyle<&Style::flexBasis, &Style::setFlexBasis>(
-      node, StyleLength::percent(flexBasisPercent));
+      node, StyleSizeValue::percent(flexBasisPercent));
 }
 
 void YGNodeStyleSetFlexBasisAuto(const YGNodeRef node) {
   updateStyle<&Style::flexBasis, &Style::setFlexBasis>(
-      node, StyleLength::ofAuto());
+      node, StyleSizeValue::ofAuto());
 }
 
 YGValue YGNodeStyleGetFlexBasis(const YGNodeConstRef node) {
@@ -308,17 +308,17 @@ YGBoxSizing YGNodeStyleGetBoxSizing(const YGNodeConstRef node) {
 
 void YGNodeStyleSetWidth(YGNodeRef node, float points) {
   updateStyle<&Style::dimension, &Style::setDimension>(
-      node, Dimension::Width, StyleLength::points(points));
+      node, Dimension::Width, StyleSizeValue::points(points));
 }
 
 void YGNodeStyleSetWidthPercent(YGNodeRef node, float percent) {
   updateStyle<&Style::dimension, &Style::setDimension>(
-      node, Dimension::Width, StyleLength::percent(percent));
+      node, Dimension::Width, StyleSizeValue::percent(percent));
 }
 
 void YGNodeStyleSetWidthAuto(YGNodeRef node) {
   updateStyle<&Style::dimension, &Style::setDimension>(
-      node, Dimension::Width, StyleLength::ofAuto());
+      node, Dimension::Width, StyleSizeValue::ofAuto());
 }
 
 YGValue YGNodeStyleGetWidth(YGNodeConstRef node) {
@@ -327,17 +327,17 @@ YGValue YGNodeStyleGetWidth(YGNodeConstRef node) {
 
 void YGNodeStyleSetHeight(YGNodeRef node, float points) {
   updateStyle<&Style::dimension, &Style::setDimension>(
-      node, Dimension::Height, StyleLength::points(points));
+      node, Dimension::Height, StyleSizeValue::points(points));
 }
 
 void YGNodeStyleSetHeightPercent(YGNodeRef node, float percent) {
   updateStyle<&Style::dimension, &Style::setDimension>(
-      node, Dimension::Height, StyleLength::percent(percent));
+      node, Dimension::Height, StyleSizeValue::percent(percent));
 }
 
 void YGNodeStyleSetHeightAuto(YGNodeRef node) {
   updateStyle<&Style::dimension, &Style::setDimension>(
-      node, Dimension::Height, StyleLength::ofAuto());
+      node, Dimension::Height, StyleSizeValue::ofAuto());
 }
 
 YGValue YGNodeStyleGetHeight(YGNodeConstRef node) {
@@ -346,12 +346,12 @@ YGValue YGNodeStyleGetHeight(YGNodeConstRef node) {
 
 void YGNodeStyleSetMinWidth(const YGNodeRef node, const float minWidth) {
   updateStyle<&Style::minDimension, &Style::setMinDimension>(
-      node, Dimension::Width, StyleLength::points(minWidth));
+      node, Dimension::Width, StyleSizeValue::points(minWidth));
 }
 
 void YGNodeStyleSetMinWidthPercent(const YGNodeRef node, const float minWidth) {
   updateStyle<&Style::minDimension, &Style::setMinDimension>(
-      node, Dimension::Width, StyleLength::percent(minWidth));
+      node, Dimension::Width, StyleSizeValue::percent(minWidth));
 }
 
 YGValue YGNodeStyleGetMinWidth(const YGNodeConstRef node) {
@@ -360,14 +360,14 @@ YGValue YGNodeStyleGetMinWidth(const YGNodeConstRef node) {
 
 void YGNodeStyleSetMinHeight(const YGNodeRef node, const float minHeight) {
   updateStyle<&Style::minDimension, &Style::setMinDimension>(
-      node, Dimension::Height, StyleLength::points(minHeight));
+      node, Dimension::Height, StyleSizeValue::points(minHeight));
 }
 
 void YGNodeStyleSetMinHeightPercent(
     const YGNodeRef node,
     const float minHeight) {
   updateStyle<&Style::minDimension, &Style::setMinDimension>(
-      node, Dimension::Height, StyleLength::percent(minHeight));
+      node, Dimension::Height, StyleSizeValue::percent(minHeight));
 }
 
 YGValue YGNodeStyleGetMinHeight(const YGNodeConstRef node) {
@@ -376,12 +376,12 @@ YGValue YGNodeStyleGetMinHeight(const YGNodeConstRef node) {
 
 void YGNodeStyleSetMaxWidth(const YGNodeRef node, const float maxWidth) {
   updateStyle<&Style::maxDimension, &Style::setMaxDimension>(
-      node, Dimension::Width, StyleLength::points(maxWidth));
+      node, Dimension::Width, StyleSizeValue::points(maxWidth));
 }
 
 void YGNodeStyleSetMaxWidthPercent(const YGNodeRef node, const float maxWidth) {
   updateStyle<&Style::maxDimension, &Style::setMaxDimension>(
-      node, Dimension::Width, StyleLength::percent(maxWidth));
+      node, Dimension::Width, StyleSizeValue::percent(maxWidth));
 }
 
 YGValue YGNodeStyleGetMaxWidth(const YGNodeConstRef node) {
@@ -390,14 +390,14 @@ YGValue YGNodeStyleGetMaxWidth(const YGNodeConstRef node) {
 
 void YGNodeStyleSetMaxHeight(const YGNodeRef node, const float maxHeight) {
   updateStyle<&Style::maxDimension, &Style::setMaxDimension>(
-      node, Dimension::Height, StyleLength::points(maxHeight));
+      node, Dimension::Height, StyleSizeValue::points(maxHeight));
 }
 
 void YGNodeStyleSetMaxHeightPercent(
     const YGNodeRef node,
     const float maxHeight) {
   updateStyle<&Style::maxDimension, &Style::setMaxDimension>(
-      node, Dimension::Height, StyleLength::percent(maxHeight));
+      node, Dimension::Height, StyleSizeValue::percent(maxHeight));
 }
 
 YGValue YGNodeStyleGetMaxHeight(const YGNodeConstRef node) {

yoga/YGValue.h

@@ -65,6 +65,9 @@ inline bool operator==(const YGValue& lhs, const YGValue& rhs) {
   switch (lhs.unit) {
     case YGUnitUndefined:
     case YGUnitAuto:
+    case YGUnitFitContent:
+    case YGUnitMaxContent:
+    case YGUnitStretch:
       return true;
     case YGUnitPoint:
     case YGUnitPercent:

yoga/enums/Unit.h

@@ -20,11 +20,14 @@ enum class Unit : uint8_t {
   Point = YGUnitPoint,
   Percent = YGUnitPercent,
   Auto = YGUnitAuto,
+  MaxContent = YGUnitMaxContent,
+  FitContent = YGUnitFitContent,
+  Stretch = YGUnitStretch,
 };
 
 template <>
 constexpr int32_t ordinalCount<Unit>() {
-  return 4;
+  return 7;
 }
 
 constexpr Unit scopedEnum(YGUnit unscoped) {

yoga/node/Node.cpp

@@ -282,16 +282,16 @@ void Node::setPosition(
       crossAxisTrailingEdge);
 }
 
-Style::Length Node::processFlexBasis() const {
-  Style::Length flexBasis = style_.flexBasis();
+Style::SizeValue Node::processFlexBasis() const {
+  Style::SizeValue flexBasis = style_.flexBasis();
   if (flexBasis.unit() != Unit::Auto && flexBasis.unit() != Unit::Undefined) {
     return flexBasis;
   }
   if (style_.flex().isDefined() && style_.flex().unwrap() > 0.0f) {
-    return config_->useWebDefaults() ? StyleLength::ofAuto()
-                                     : StyleLength::points(0);
+    return config_->useWebDefaults() ? StyleSizeValue::ofAuto()
+                                     : StyleSizeValue::points(0);
   }
-  return StyleLength::ofAuto();
+  return StyleSizeValue::ofAuto();
 }
 
 FloatOptional Node::resolveFlexBasis(