[CSS Grid Layout] Support calc() breadth track size

Source/core/css/CSSComputedStyleDeclaration.cpp

Index: Source/core/css/CSSComputedStyleDeclaration.cpp
diff --git a/Source/core/css/CSSComputedStyleDeclaration.cpp b/Source/core/css/CSSComputedStyleDeclaration.cpp
index 37ef5411c1276260eda79819bbcf5ce26747665b..fecba0c5580bffcf537bb7b1076145bd1d6c2154 100644
--- a/Source/core/css/CSSComputedStyleDeclaration.cpp
+++ b/Source/core/css/CSSComputedStyleDeclaration.cpp
@@ -997,8 +997,9 @@ PassRefPtr<CSSValue> CSSComputedStyleDeclaration::valueForFilter(const RenderObj
     return list.release();
 }
 
-static PassRefPtr<CSSValue> valueForGridTrackBreadth(const GridLength& trackBreadth, const RenderStyle* style, RenderView* renderView)
+static PassRefPtr<CSSValue> valueForGridTrackBreadth(const GridLength& trackBreadth, const RenderStyle* style, const LayoutUnit& maxSize, RenderView* renderView)
 {
+    // FIXME: according to the specs we must always return the used value http://crbug.com/297158
     if (!trackBreadth.isLength())
         return cssValuePool().createValue(trackBreadth.flex(), CSSPrimitiveValue::CSS_FR);
 
@@ -1007,18 +1008,20 @@ static PassRefPtr<CSSValue> valueForGridTrackBreadth(const GridLength& trackBrea
         return cssValuePool().createIdentifierValue(CSSValueAuto);
     if (trackBreadthLength.isViewportPercentage())
         return zoomAdjustedPixelValue(valueForLength(trackBreadthLength, 0, renderView), style);
+    if (trackBreadthLength.isCalculated())
+        return zoomAdjustedPixelValue(valueForLength(trackBreadthLength, maxSize, renderView), style);
     return zoomAdjustedPixelValueForLength(trackBreadthLength, style);
 }
 
-static PassRefPtr<CSSValue> valueForGridTrackSize(const GridTrackSize& trackSize, const RenderStyle* style, RenderView* renderView)
+static PassRefPtr<CSSValue> valueForGridTrackSize(const GridTrackSize& trackSize, const RenderStyle* style, const LayoutUnit& maxSize, RenderView* renderView)
 {
     switch (trackSize.type()) {
     case LengthTrackSizing:
-        return valueForGridTrackBreadth(trackSize.length(), style, renderView);
+        return valueForGridTrackBreadth(trackSize.length(), style, maxSize, renderView);
     case MinMaxTrackSizing:
         RefPtr<CSSValueList> minMaxTrackBreadths = CSSValueList::createCommaSeparated();
-        minMaxTrackBreadths->append(valueForGridTrackBreadth(trackSize.minTrackBreadth(), style, renderView));
-        minMaxTrackBreadths->append(valueForGridTrackBreadth(trackSize.maxTrackBreadth(), style, renderView));
+        minMaxTrackBreadths->append(valueForGridTrackBreadth(trackSize.minTrackBreadth(), style, maxSize, renderView));
+        minMaxTrackBreadths->append(valueForGridTrackBreadth(trackSize.maxTrackBreadth(), style, maxSize, renderView));
         return CSSFunctionValue::create("minmax(", minMaxTrackBreadths);
     }
     ASSERT_NOT_REACHED();
@@ -1032,7 +1035,7 @@ static void addValuesForNamedGridLinesAtIndex(const OrderedNamedGridLines& order
         list.append(cssValuePool().createValue(namedGridLines[j], CSSPrimitiveValue::CSS_STRING));
 }
 
-static PassRefPtr<CSSValue> valueForGridTrackList(const Vector<GridTrackSize>& trackSizes, const OrderedNamedGridLines& orderedNamedGridLines, const RenderStyle* style, RenderView* renderView)
+static PassRefPtr<CSSValue> valueForGridTrackList(const Vector<GridTrackSize>& trackSizes, const OrderedNamedGridLines& orderedNamedGridLines, const RenderStyle* style, const LayoutUnit& maxSize, RenderView* renderView)
 {
     // Handle the 'none' case here.
     if (!trackSizes.size()) {
@@ -1043,7 +1046,7 @@ static PassRefPtr<CSSValue> valueForGridTrackList(const Vector<GridTrackSize>& t
     RefPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
     for (size_t i = 0; i < trackSizes.size(); ++i) {
         addValuesForNamedGridLinesAtIndex(orderedNamedGridLines, i, *list);
-        list->append(valueForGridTrackSize(trackSizes[i], style, renderView));
+        list->append(valueForGridTrackSize(trackSizes[i], style, maxSize, renderView));
     }
     // Those are the trailing <string>* allowed in the syntax.
     addValuesForNamedGridLinesAtIndex(orderedNamedGridLines, trackSizes.size(), *list);
@@ -1561,6 +1564,8 @@ static bool isLayoutDependent(CSSPropertyID propertyID, PassRefPtr<RenderStyle>
     // FIXME: Some of these cases could be narrowed down or optimized better.
     switch (propertyID) {
     case CSSPropertyBottom:
+    case CSSPropertyGridDefinitionColumns:
+    case CSSPropertyGridDefinitionRows:
     case CSSPropertyHeight:
     case CSSPropertyLeft:
     case CSSPropertyRight:
@@ -2034,15 +2039,15 @@ PassRefPtr<CSSValue> CSSComputedStyleDeclaration::getPropertyCSSValue(CSSPropert
             return list.release();
         }
         case CSSPropertyGridAutoColumns:
-            return valueForGridTrackSize(style->gridAutoColumns(), style.get(), m_node->document().renderView());
+            return valueForGridTrackSize(style->gridAutoColumns(), style.get(), sizingBox(renderer).width(), m_node->document().renderView());
         case CSSPropertyGridAutoFlow:
             return cssValuePool().createValue(style->gridAutoFlow());
         case CSSPropertyGridAutoRows:
-            return valueForGridTrackSize(style->gridAutoRows(), style.get(), m_node->document().renderView());
+            return valueForGridTrackSize(style->gridAutoRows(), style.get(), sizingBox(renderer).height(), m_node->document().renderView());
         case CSSPropertyGridDefinitionColumns:
-            return valueForGridTrackList(style->gridDefinitionColumns(), style->orderedNamedGridColumnLines(), style.get(), m_node->document().renderView());
+            return valueForGridTrackList(style->gridDefinitionColumns(), style->orderedNamedGridColumnLines(), style.get(), sizingBox(renderer).width(), m_node->document().renderView());
         case CSSPropertyGridDefinitionRows:
-            return valueForGridTrackList(style->gridDefinitionRows(), style->orderedNamedGridRowLines(), style.get(), m_node->document().renderView());
+            return valueForGridTrackList(style->gridDefinitionRows(), style->orderedNamedGridRowLines(), style.get(), sizingBox(renderer).height(), m_node->document().renderView());
 
         case CSSPropertyGridColumnStart:
             return valueForGridPosition(style->gridColumnStart());