Add CSS parser support for break-after, break-before and break-inside.

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

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2005, 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Adobe Systems Incorporated. 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
@@ skipping 1849 matching lines @@
         curr = curr->containingBlock();
     }
     return true;
 }
 
 bool LayoutBox::hasForcedBreakBefore() const
 {
     LayoutFlowThread* flowThread = flowThreadContainingBlock();
     bool checkColumnBreaks = flowThread;
     bool checkPageBreaks = !checkColumnBreaks && view()->layoutState()->pageLogicalHeight(); // TODO(mstensho): Once columns can print, we have to check this.
-    bool checkBeforeAlways = (checkColumnBreaks && style()->columnBreakBefore() == PBALWAYS)
-        || (checkPageBreaks && style()->pageBreakBefore() == PBALWAYS);
+    bool checkBeforeAlways = (checkColumnBreaks && style()->breakBefore() == BreakColumn)
+        || (checkPageBreaks && style()->breakBefore() == BreakPage);
     return checkBeforeAlways && isForcedBreakAllowed(this);
 }
 
 bool LayoutBox::hasForcedBreakAfter() const
 {
     LayoutFlowThread* flowThread = flowThreadContainingBlock();
     bool checkColumnBreaks = flowThread;
     bool checkPageBreaks = !checkColumnBreaks && view()->layoutState()->pageLogicalHeight(); // TODO(mstensho): Once columns can print, we have to check this.
-    bool checkAfterAlways = (checkColumnBreaks && style()->columnBreakAfter() == PBALWAYS)
-        || (checkPageBreaks && style()->pageBreakAfter() == PBALWAYS);
+    bool checkAfterAlways = (checkColumnBreaks && style()->breakAfter() == BreakColumn)
+        || (checkPageBreaks && style()->breakAfter() == BreakPage);
     return checkAfterAlways && isForcedBreakAllowed(this);
 }
 
 LayoutRect LayoutBox::clippedOverflowRectForPaintInvalidation(const LayoutBoxModelObject* paintInvalidationContainer, const PaintInvalidationState* paintInvalidationState) const
 {
     if (style()->visibility() != VISIBLE) {
         PaintLayer* layer = enclosingLayer();
         layer->updateDescendantDependentFlags();
         if (layer->subtreeIsInvisible())
             return LayoutRect();
@@ skipping 2285 matching lines @@
     // TODO(mstensho): It is wrong to check isAtomicInlineLevel() as we
     // actually look for replaced elements.
     if (isAtomicInlineLevel()
         || hasUnsplittableScrollingOverflow()
         || (parent() && isWritingModeRoot())
         || (isOutOfFlowPositioned() && style()->position() == FixedPosition))
         return ForbidBreaks;
 
     bool checkColumnBreaks = flowThreadContainingBlock();
     bool checkPageBreaks = !checkColumnBreaks && view()->layoutState()->pageLogicalHeight();
-    bool isUnsplittable = (checkColumnBreaks && style()->columnBreakInside() == PBAVOID)
-        || (checkPageBreaks && style()->pageBreakInside() == PBAVOID);
+    EBreak breakInside = style()->breakInside();
+    bool isUnsplittable = (checkColumnBreaks && (breakInside == BreakAvoid || breakInside == BreakAvoidColumn))
+        || (checkPageBreaks && (breakInside == BreakAvoid || breakInside == BreakAvoidPage));
     if (isUnsplittable)
         return AvoidBreaks;
     return AllowAnyBreaks;
 }
 
 LayoutUnit LayoutBox::lineHeight(bool /*firstLine*/, LineDirectionMode direction, LinePositionMode /*linePositionMode*/) const
 {
     if (isAtomicInlineLevel())
         return direction == HorizontalLine ? marginHeight() + size().height() : marginWidth() + size().width();
     return LayoutUnit();
@@ skipping 482 matching lines @@
 }
 
 void LayoutBox::IntrinsicSizingInfo::transpose()
 {
     size = size.transposedSize();
     aspectRatio = aspectRatio.transposedSize();
     std::swap(hasWidth, hasHeight);
 }
 
 } // namespace blink