yoga::resolveValue -> Length::resolve (facebook#1520)

Summary:
X-link: facebook/react-native#41939


This code originates as `YGValueResolve`, used to compute a YGValue to a length in points, using a reference for 100%.

This moves it to `Style::Length`, so we can encapsulate parts of it (for style value functions), and make the API more cohesive now that we can do C++ style OOP with it.

Changelog: [Internal]

Reviewed By: joevilches

Differential Revision: D51796973

Author: NickGerleman

yoga/algorithm/AbsoluteLayout.cpp

@@ -9,7 +9,6 @@
 #include <yoga/algorithm/Align.h>
 #include <yoga/algorithm/BoundAxis.h>
 #include <yoga/algorithm/CalculateLayout.h>
-#include <yoga/algorithm/ResolveValue.h>
 
 namespace facebook::yoga {
 
@@ -323,10 +322,9 @@ void layoutAbsoluteChild(
       child->getMarginForAxis(FlexDirection::Column, containingBlockWidth);
 
   if (child->styleDefinesDimension(FlexDirection::Row, containingBlockWidth)) {
-    childWidth =
-        yoga::resolveValue(
-            child->getResolvedDimension(Dimension::Width), containingBlockWidth)
-            .unwrap() +
+    childWidth = child->getResolvedDimension(Dimension::Width)
+                     .resolve(containingBlockWidth)
+                     .unwrap() +
         marginRow;
   } else {
     // If the child doesn't have a specified width, compute the width based on
@@ -352,9 +350,8 @@ void layoutAbsoluteChild(
 
   if (child->styleDefinesDimension(
           FlexDirection::Column, containingBlockHeight)) {
-    childHeight = yoga::resolveValue(
-                      child->getResolvedDimension(Dimension::Height),
-                      containingBlockHeight)
+    childHeight = child->getResolvedDimension(Dimension::Height)
+                      .resolve(containingBlockHeight)
                       .unwrap() +
         marginColumn;
   } else {

yoga/algorithm/BoundAxis.h

@@ -8,7 +8,6 @@
 #pragma once
 
 #include <yoga/algorithm/FlexDirection.h>
-#include <yoga/algorithm/ResolveValue.h>
 #include <yoga/enums/Dimension.h>
 #include <yoga/enums/FlexDirection.h>
 #include <yoga/node/Node.h>
@@ -36,15 +35,11 @@ inline FloatOptional boundAxisWithinMinAndMax(
   FloatOptional max;
 
   if (isColumn(axis)) {
-    min = yoga::resolveValue(
-        node->getStyle().minDimension(Dimension::Height), axisSize);
-    max = yoga::resolveValue(
-        node->getStyle().maxDimension(Dimension::Height), axisSize);
+    min = node->getStyle().minDimension(Dimension::Height).resolve(axisSize);
+    max = node->getStyle().maxDimension(Dimension::Height).resolve(axisSize);
   } else if (isRow(axis)) {
-    min = yoga::resolveValue(
-        node->getStyle().minDimension(Dimension::Width), axisSize);
-    max = yoga::resolveValue(
-        node->getStyle().maxDimension(Dimension::Width), axisSize);
+    min = node->getStyle().minDimension(Dimension::Width).resolve(axisSize);
+    max = node->getStyle().maxDimension(Dimension::Width).resolve(axisSize);
   }
 
   if (max >= FloatOptional{0} && value > max) {

yoga/algorithm/CalculateLayout.cpp

@@ -22,7 +22,6 @@
 #include <yoga/algorithm/FlexDirection.h>
 #include <yoga/algorithm/FlexLine.h>
 #include <yoga/algorithm/PixelGrid.h>
-#include <yoga/algorithm/ResolveValue.h>
 #include <yoga/algorithm/SizingMode.h>
 #include <yoga/debug/AssertFatal.h>
 #include <yoga/debug/Log.h>
@@ -52,15 +51,14 @@ bool calculateLayoutInternal(
     const uint32_t generationCount);
 
 static void constrainMaxSizeForMode(
-    const yoga::Node* const node,
-    const enum FlexDirection axis,
-    const float ownerAxisSize,
-    const float ownerWidth,
-    SizingMode* mode,
-    float* size) {
+    const yoga::Node* node,
+    FlexDirection axis,
+    float ownerAxisSize,
+    float ownerWidth,
+    /*in_out*/ SizingMode* mode,
+    /*in_out*/ float* size) {
   const FloatOptional maxSize =
-      yoga::resolveValue(
-          node->getStyle().maxDimension(dimension(axis)), ownerAxisSize) +
+      node->getStyle().maxDimension(dimension(axis)).resolve(ownerAxisSize) +
       FloatOptional(node->getMarginForAxis(axis, ownerWidth));
   switch (*mode) {
     case SizingMode::StretchFit:
@@ -103,7 +101,7 @@ static void computeFlexBasisForChild(
   SizingMode childHeightSizingMode;
 
   const FloatOptional resolvedFlexBasis =
-      yoga::resolveValue(child->resolveFlexBasisPtr(), mainAxisownerSize);
+      child->resolveFlexBasisPtr().resolve(mainAxisownerSize);
   const bool isRowStyleDimDefined =
       child->styleDefinesDimension(FlexDirection::Row, ownerWidth);
   const bool isColumnStyleDimDefined =
@@ -125,16 +123,14 @@ static void computeFlexBasisForChild(
         paddingAndBorderForAxis(child, FlexDirection::Row, ownerWidth));
 
     child->setLayoutComputedFlexBasis(yoga::maxOrDefined(
-        yoga::resolveValue(
-            child->getResolvedDimension(Dimension::Width), ownerWidth),
+        child->getResolvedDimension(Dimension::Width).resolve(ownerWidth),
         paddingAndBorder));
   } else if (!isMainAxisRow && isColumnStyleDimDefined) {
     // The height is definite, so use that as the flex basis.
     const FloatOptional paddingAndBorder = FloatOptional(
         paddingAndBorderForAxis(child, FlexDirection::Column, ownerWidth));
     child->setLayoutComputedFlexBasis(yoga::maxOrDefined(
-        yoga::resolveValue(
-            child->getResolvedDimension(Dimension::Height), ownerHeight),
+        child->getResolvedDimension(Dimension::Height).resolve(ownerHeight),
         paddingAndBorder));
   } else {
     // Compute the flex basis and hypothetical main size (i.e. the clamped flex
@@ -149,18 +145,16 @@ static void computeFlexBasisForChild(
         child->getMarginForAxis(FlexDirection::Column, ownerWidth);
 
     if (isRowStyleDimDefined) {
-      childWidth =
-          yoga::resolveValue(
-              child->getResolvedDimension(Dimension::Width), ownerWidth)
-              .unwrap() +
+      childWidth = child->getResolvedDimension(Dimension::Width)
+                       .resolve(ownerWidth)
+                       .unwrap() +
           marginRow;
       childWidthSizingMode = SizingMode::StretchFit;
     }
     if (isColumnStyleDimDefined) {
-      childHeight =
-          yoga::resolveValue(
-              child->getResolvedDimension(Dimension::Height), ownerHeight)
-              .unwrap() +
+      childHeight = child->getResolvedDimension(Dimension::Height)
+                        .resolve(ownerHeight)
+                        .unwrap() +
           marginColumn;
       childHeightSizingMode = SizingMode::StretchFit;
     }
@@ -477,13 +471,13 @@ static float calculateAvailableInnerDimension(
     // We want to make sure our available height does not violate min and max
     // constraints
     const FloatOptional minDimensionOptional =
-        yoga::resolveValue(node->getStyle().minDimension(dimension), ownerDim);
+        node->getStyle().minDimension(dimension).resolve(ownerDim);
     const float minInnerDim = minDimensionOptional.isUndefined()
         ? 0.0f
         : minDimensionOptional.unwrap() - paddingAndBorder;
 
     const FloatOptional maxDimensionOptional =
-        yoga::resolveValue(node->getStyle().maxDimension(dimension), ownerDim);
+        node->getStyle().maxDimension(dimension).resolve(ownerDim);
 
     const float maxInnerDim = maxDimensionOptional.isUndefined()
         ? FLT_MAX
@@ -700,9 +694,8 @@ static float distributeFreeSpaceSecondPass(
           : SizingMode::FitContent;
     } else {
       childCrossSize =
-          yoga::resolveValue(
-              currentLineChild->getResolvedDimension(dimension(crossAxis)),
-              availableInnerCrossDim)
+          currentLineChild->getResolvedDimension(dimension(crossAxis))
+              .resolve(availableInnerCrossDim)
               .unwrap() +
           marginCross;
       const bool isLoosePercentageMeasurement =
@@ -954,8 +947,8 @@ static void justifyMainAxis(
   if (sizingModeMainDim == SizingMode::FitContent &&
       flexLine.layout.remainingFreeSpace > 0) {
     if (style.minDimension(dimension(mainAxis)).isDefined() &&
-        yoga::resolveValue(
-            style.minDimension(dimension(mainAxis)), mainAxisownerSize)
+        style.minDimension(dimension(mainAxis))
+            .resolve(mainAxisownerSize)
             .isDefined()) {
       // This condition makes sure that if the size of main dimension(after
       // considering child nodes main dim, leading and trailing padding etc)
@@ -964,10 +957,9 @@ static void justifyMainAxis(
 
       // `minAvailableMainDim` denotes minimum available space in which child
       // can be laid out, it will exclude space consumed by padding and border.
-      const float minAvailableMainDim =
-          yoga::resolveValue(
-              style.minDimension(dimension(mainAxis)), mainAxisownerSize)
-              .unwrap() -
+      const float minAvailableMainDim = style.minDimension(dimension(mainAxis))
+                                            .resolve(mainAxisownerSize)
+                                            .unwrap() -
           leadingPaddingAndBorderMain - trailingPaddingAndBorderMain;
       const float occupiedSpaceByChildNodes =
           availableInnerMainDim - flexLine.layout.remainingFreeSpace;
@@ -1446,20 +1438,16 @@ static void calculateLayoutImpl(
     if (sizingModeMainDim != SizingMode::StretchFit) {
       const auto& style = node->getStyle();
       const float minInnerWidth =
-          yoga::resolveValue(style.minDimension(Dimension::Width), ownerWidth)
-              .unwrap() -
+          style.minDimension(Dimension::Width).resolve(ownerWidth).unwrap() -
           paddingAndBorderAxisRow;
       const float maxInnerWidth =
-          yoga::resolveValue(style.maxDimension(Dimension::Width), ownerWidth)
-              .unwrap() -
+          style.maxDimension(Dimension::Width).resolve(ownerWidth).unwrap() -
           paddingAndBorderAxisRow;
       const float minInnerHeight =
-          yoga::resolveValue(style.minDimension(Dimension::Height), ownerHeight)
-              .unwrap() -
+          style.minDimension(Dimension::Height).resolve(ownerHeight).unwrap() -
           paddingAndBorderAxisColumn;
       const float maxInnerHeight =
-          yoga::resolveValue(style.maxDimension(Dimension::Height), ownerHeight)
-              .unwrap() -
+          style.maxDimension(Dimension::Height).resolve(ownerHeight).unwrap() -
           paddingAndBorderAxisColumn;
 
       const float minInnerMainDim =
@@ -2431,17 +2419,15 @@ void calculateLayout(
   const auto& style = node->getStyle();
   if (node->styleDefinesDimension(FlexDirection::Row, ownerWidth)) {
     width =
-        (yoga::resolveValue(
-             node->getResolvedDimension(dimension(FlexDirection::Row)),
-             ownerWidth)
+        (node->getResolvedDimension(dimension(FlexDirection::Row))
+             .resolve(ownerWidth)
              .unwrap() +
          node->getMarginForAxis(FlexDirection::Row, ownerWidth));
     widthSizingMode = SizingMode::StretchFit;
-  } else if (yoga::resolveValue(
-                 style.maxDimension(Dimension::Width), ownerWidth)
+  } else if (style.maxDimension(Dimension::Width)
+                 .resolve(ownerWidth)
                  .isDefined()) {
-    width = yoga::resolveValue(style.maxDimension(Dimension::Width), ownerWidth)
-                .unwrap();
+    width = style.maxDimension(Dimension::Width).resolve(ownerWidth).unwrap();
     widthSizingMode = SizingMode::FitContent;
   } else {
     width = ownerWidth;
@@ -2453,18 +2439,16 @@ void calculateLayout(
   SizingMode heightSizingMode = SizingMode::MaxContent;
   if (node->styleDefinesDimension(FlexDirection::Column, ownerHeight)) {
     height =
-        (yoga::resolveValue(
-             node->getResolvedDimension(dimension(FlexDirection::Column)),
-             ownerHeight)
+        (node->getResolvedDimension(dimension(FlexDirection::Column))
+             .resolve(ownerHeight)
              .unwrap() +
          node->getMarginForAxis(FlexDirection::Column, ownerWidth));
     heightSizingMode = SizingMode::StretchFit;
-  } else if (yoga::resolveValue(
-                 style.maxDimension(Dimension::Height), ownerHeight)
+  } else if (style.maxDimension(Dimension::Height)
+                 .resolve(ownerHeight)
                  .isDefined()) {
     height =
-        yoga::resolveValue(style.maxDimension(Dimension::Height), ownerHeight)
-            .unwrap();
+        style.maxDimension(Dimension::Height).resolve(ownerHeight).unwrap();
     heightSizingMode = SizingMode::FitContent;
   } else {
     height = ownerHeight;