[CSS Grid Layout] Upgrade justify-content parsing to CSS3 Box Alignment spec.

Source/core/rendering/RenderFlexibleBox.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 931 matching lines @@
     }
 
     if (totalViolation)
         freezeViolations(totalViolation < 0 ? maxViolations : minViolations, availableFreeSpace, totalFlexGrow, totalWeightedFlexShrink, inflexibleItems, hasInfiniteLineLength);
     else
         availableFreeSpace -= usedFreeSpace;
 
     return !totalViolation;
 }
 
-static LayoutUnit initialJustifyContentOffset(LayoutUnit availableFreeSpace, EJustifyContent justifyContent, unsigned numberOfChildren)
+static LayoutUnit initialJustifyContentOffset(LayoutUnit availableFreeSpace, ContentPosition justifyContent, ContentDistributionType justifyContentDistribution, unsigned numberOfChildren)
 {
-    if (justifyContent == JustifyFlexEnd)
+    if (justifyContent == ContentPositionFlexEnd)
         return availableFreeSpace;
-    if (justifyContent == JustifyCenter)
+    if (justifyContent == ContentPositionCenter)
         return availableFreeSpace / 2;
-    if (justifyContent == JustifySpaceAround) {
+    if (justifyContentDistribution == ContentDistributionSpaceAround) {
         if (availableFreeSpace > 0 && numberOfChildren)
             return availableFreeSpace / (2 * numberOfChildren);
         else
             return availableFreeSpace / 2;
     }
     return 0;
 }
 
-static LayoutUnit justifyContentSpaceBetweenChildren(LayoutUnit availableFreeSpace, EJustifyContent justifyContent, unsigned numberOfChildren)
+static LayoutUnit justifyContentSpaceBetweenChildren(LayoutUnit availableFreeSpace, ContentDistributionType justifyContentDistribution, unsigned numberOfChildren)
 {
     if (availableFreeSpace > 0 && numberOfChildren > 1) {
-        if (justifyContent == JustifySpaceBetween)
+        if (justifyContentDistribution == ContentDistributionSpaceBetween)
             return availableFreeSpace / (numberOfChildren - 1);
-        if (justifyContent == JustifySpaceAround)
+        if (justifyContentDistribution == ContentDistributionSpaceAround)
             return availableFreeSpace / numberOfChildren;
     }
     return 0;
 }
 
 void RenderFlexibleBox::setLogicalOverrideSize(RenderBox& child, LayoutUnit childPreferredSize)
 {
     if (hasOrthogonalFlow(child))
         child.setOverrideLogicalContentHeight(childPreferredSize - child.borderAndPaddingLogicalHeight());
     else
@@ skipping 72 matching lines @@
     return isHorizontalFlow() && child.style()->height().isAuto();
 }
 
 void RenderFlexibleBox::layoutAndPlaceChildren(LayoutUnit& crossAxisOffset, const OrderedFlexItemList& children, const Vector<LayoutUnit, 16>& childSizes, LayoutUnit availableFreeSpace, bool relayoutChildren, Vector<LineContext>& lineContexts, bool hasInfiniteLineLength)
 {
     ASSERT(childSizes.size() == children.size());
 
     size_t numberOfChildrenForJustifyContent = numberOfInFlowPositionedChildren(children);
     LayoutUnit autoMarginOffset = autoMarginOffsetInMainAxis(children, availableFreeSpace);
     LayoutUnit mainAxisOffset = flowAwareBorderStart() + flowAwarePaddingStart();
-    mainAxisOffset += initialJustifyContentOffset(availableFreeSpace, style()->justifyContent(), numberOfChildrenForJustifyContent);
+    mainAxisOffset += initialJustifyContentOffset(availableFreeSpace, style()->justifyContent(), style()->justifyContentDistribution(), numberOfChildrenForJustifyContent);
     if (style()->flexDirection() == FlowRowReverse)
         mainAxisOffset += isHorizontalFlow() ? verticalScrollbarWidth() : horizontalScrollbarHeight();
 
     LayoutUnit totalMainExtent = mainAxisExtent();
     LayoutUnit maxAscent = 0, maxDescent = 0; // Used when align-items: baseline.
     LayoutUnit maxChildCrossAxisExtent = 0;
     size_t seenInFlowPositionedChildren = 0;
     bool shouldFlipMainAxis = !isColumnFlow() && !isLeftToRightFlow();
     for (size_t i = 0; i < children.size(); ++i) {
         RenderBox* child = children[i];
@@ skipping 44 matching lines @@
         // This will be fixed later in flipForRightToLeftColumn.
         LayoutPoint childLocation(shouldFlipMainAxis ? totalMainExtent - mainAxisOffset - childMainExtent : mainAxisOffset,
             crossAxisOffset + flowAwareMarginBeforeForChild(*child));
 
         // FIXME: Supporting layout deltas.
         setFlowAwareLocationForChild(*child, childLocation);
         mainAxisOffset += childMainExtent + flowAwareMarginEndForChild(*child);
 
         ++seenInFlowPositionedChildren;
         if (seenInFlowPositionedChildren < numberOfChildrenForJustifyContent)
-            mainAxisOffset += justifyContentSpaceBetweenChildren(availableFreeSpace, style()->justifyContent(), numberOfChildrenForJustifyContent);
+            mainAxisOffset += justifyContentSpaceBetweenChildren(availableFreeSpace, style()->justifyContentDistribution(), numberOfChildrenForJustifyContent);
     }
 
     if (isColumnFlow())
         setLogicalHeight(mainAxisOffset + flowAwareBorderEnd() + flowAwarePaddingEnd() + scrollbarLogicalHeight());
 
     if (style()->flexDirection() == FlowColumnReverse) {
         // We have to do an extra pass for column-reverse to reposition the flex items since the start depends
         // on the height of the flexbox, which we only know after we've positioned all the flex items.
         updateLogicalHeight();
         layoutColumnReverse(children, crossAxisOffset, availableFreeSpace);
     }
 
     if (m_numberOfInFlowChildrenOnFirstLine == -1)
         m_numberOfInFlowChildrenOnFirstLine = seenInFlowPositionedChildren;
     lineContexts.append(LineContext(crossAxisOffset, maxChildCrossAxisExtent, children.size(), maxAscent));
     crossAxisOffset += maxChildCrossAxisExtent;
 }
 
 void RenderFlexibleBox::layoutColumnReverse(const OrderedFlexItemList& children, LayoutUnit crossAxisOffset, LayoutUnit availableFreeSpace)
 {
     // This is similar to the logic in layoutAndPlaceChildren, except we place the children
     // starting from the end of the flexbox. We also don't need to layout anything since we're
     // just moving the children to a new position.
     size_t numberOfChildrenForJustifyContent = numberOfInFlowPositionedChildren(children);
     LayoutUnit mainAxisOffset = logicalHeight() - flowAwareBorderEnd() - flowAwarePaddingEnd();
-    mainAxisOffset -= initialJustifyContentOffset(availableFreeSpace, style()->justifyContent(), numberOfChildrenForJustifyContent);
+    mainAxisOffset -= initialJustifyContentOffset(availableFreeSpace, style()->justifyContent(), style()->justifyContentDistribution(), numberOfChildrenForJustifyContent);
     mainAxisOffset -= isHorizontalFlow() ? verticalScrollbarWidth() : horizontalScrollbarHeight();
 
     size_t seenInFlowPositionedChildren = 0;
     for (size_t i = 0; i < children.size(); ++i) {
         RenderBox* child = children[i];
 
         if (child->isOutOfFlowPositioned()) {
             child->layer()->setStaticBlockPosition(mainAxisOffset);
             continue;
         }
         mainAxisOffset -= mainAxisExtentForChild(*child) + flowAwareMarginEndForChild(*child);
 
         setFlowAwareLocationForChild(*child, LayoutPoint(mainAxisOffset, crossAxisOffset + flowAwareMarginBeforeForChild(*child)));
 
         mainAxisOffset -= flowAwareMarginStartForChild(*child);
 
         ++seenInFlowPositionedChildren;
         if (seenInFlowPositionedChildren < numberOfChildrenForJustifyContent)
-            mainAxisOffset -= justifyContentSpaceBetweenChildren(availableFreeSpace, style()->justifyContent(), numberOfChildrenForJustifyContent);
+            mainAxisOffset -= justifyContentSpaceBetweenChildren(availableFreeSpace, style()->justifyContentDistribution(), numberOfChildrenForJustifyContent);
     }
 }
 
 static LayoutUnit initialAlignContentOffset(LayoutUnit availableFreeSpace, EAlignContent alignContent, unsigned numberOfLines)
 {
     if (numberOfLines <= 1)
         return 0;
     if (alignContent == AlignContentFlexEnd)
         return availableFreeSpace;
     if (alignContent == AlignContentCenter)
@@ skipping 207 matching lines @@
             ASSERT(child);
             LayoutUnit lineCrossAxisExtent = lineContexts[lineNumber].crossAxisExtent;
             LayoutUnit originalOffset = lineContexts[lineNumber].crossAxisOffset - crossAxisStartEdge;
             LayoutUnit newOffset = contentExtent - originalOffset - lineCrossAxisExtent;
             adjustAlignmentForChild(*child, newOffset - originalOffset);
         }
     }
 }
 
 }