WIP: snap-width

third_party/WebKit/Source/core/layout/LayoutBox.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2003, 2006, 2007 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 694 matching lines @@
 
     virtual LayoutUnit computeReplacedLogicalWidth(ShouldComputePreferred  = ComputeActual) const;
     virtual LayoutUnit computeReplacedLogicalHeight() const;
 
     bool hasDefiniteLogicalWidth() const;
     bool percentageLogicalHeightIsResolvable() const;
     bool hasDefiniteLogicalHeight() const;
     LayoutUnit computePercentageLogicalHeight(const Length& height) const;
 
     // Block flows subclass availableWidth/Height to handle multi column layout (shrinking the width/height available to children when laying out.)
-    LayoutUnit availableLogicalWidth() const { return contentLogicalWidth(); }
+    LayoutUnit availableLogicalWidth() const { return LIKELY(!styleRef().snapWidth()) ? contentLogicalWidth() : snapContentLogicalWidth(); }
     LayoutUnit availableLogicalHeight(AvailableLogicalHeightType) const;
     LayoutUnit availableLogicalHeightUsing(const Length&, AvailableLogicalHeightType) const;
 
     // There are a few cases where we need to refer specifically to the available physical width and available physical height.
     // Relative positioning is one of those cases, since left/top offsets are physical.
     LayoutUnit availableWidth() const { return style()->isHorizontalWritingMode() ? availableLogicalWidth() : availableLogicalHeight(IncludeMarginBorderPadding); }
     LayoutUnit availableHeight() const { return style()->isHorizontalWritingMode() ? availableLogicalHeight(IncludeMarginBorderPadding) : availableLogicalWidth(); }
 
     int verticalScrollbarWidth() const;
     int horizontalScrollbarHeight() const;
@@ skipping 243 matching lines @@
 private:
     bool mustInvalidateBackgroundOrBorderPaintOnHeightChange() const;
     bool mustInvalidateBackgroundOrBorderPaintOnWidthChange() const;
     inline bool mustInvalidateFillLayersPaintOnWidthChange(const FillLayer&) const;
 
     void invalidatePaintRectClippedByOldAndNewBounds(const LayoutBoxModelObject& paintInvalidationContainer, const LayoutRect&, const LayoutRect& oldBounds, const LayoutRect& newBounds);
 
     void updateShapeOutsideInfoAfterStyleChange(const ComputedStyle&, const ComputedStyle* oldStyle);
     void updateGridPositionAfterStyleChange(const ComputedStyle*);
 
+    LayoutUnit snapContentLogicalWidth() const;
     bool autoWidthShouldFitContent() const;
     LayoutUnit shrinkToFitLogicalWidth(LayoutUnit availableLogicalWidth, LayoutUnit bordersPlusPadding) const;
 
     // Returns true if we queued up a paint invalidation.
     bool invalidatePaintOfLayerRectsForImage(WrappedImagePtr, const FillLayer&, bool drawingBackground);
 
     bool stretchesToViewportInQuirksMode() const;
     bool skipContainingBlockForPercentHeightCalculation(const LayoutBox* containingBlock) const;
 
     virtual void computePositionedLogicalHeight(LogicalExtentComputedValues&) const;
@@ skipping 171 matching lines @@
         || breakValue == BreakLeft
         || breakValue == BreakPage
         || breakValue == BreakRecto
         || breakValue == BreakRight
         || breakValue == BreakVerso;
 }
 
 } // namespace blink
 
 #endif // LayoutBox_h