Autosize flex boxes.

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 13 matching lines @@
  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "core/rendering/RenderFlexibleBox.h"
 
+#include "core/rendering/FastTextAutosizer.h"
 #include "core/rendering/LayoutRepainter.h"
 #include "core/rendering/RenderLayer.h"
 #include "core/rendering/RenderView.h"
 #include "platform/LengthFunctions.h"
 #include "wtf/MathExtras.h"
 #include <limits>
 
 namespace WebCore {
 
 struct RenderFlexibleBox::LineContext {
@@ skipping 189 matching lines @@
 
     LayoutRepainter repainter(*this, checkForRepaintDuringLayout());
 
     if (updateLogicalWidthAndColumnWidth())
         relayoutChildren = true;
 
     LayoutUnit previousHeight = logicalHeight();
     setLogicalHeight(borderAndPaddingLogicalHeight() + scrollbarLogicalHeight());
 
     {
+        FastTextAutosizer::LayoutScope fastTextAutosizerLayoutScope(this);

[pdr., 2014/06/11 03:57:05]

If we moved these outside this scope, could we assert(!needsLayout()) in the
LayoutScope destructor?

[skobes, 2014/06/11 21:36:21]

Maybe, but I'm not sure why that's useful?

         LayoutStateMaintainer statePusher(*this, locationOffset());
 
         m_numberOfInFlowChildrenOnFirstLine = -1;
 
         RenderBlock::startDelayUpdateScrollInfo();
 
         prepareOrderIteratorAndMargins();
 
         ChildFrameRects oldChildRects;
         appendChildFrameRects(oldChildRects);
@@ skipping 1160 matching lines @@
             ASSERT(child);
             LayoutUnit lineCrossAxisExtent = lineContexts[lineNumber].crossAxisExtent;
             LayoutUnit originalOffset = lineContexts[lineNumber].crossAxisOffset - crossAxisStartEdge;
             LayoutUnit newOffset = contentExtent - originalOffset - lineCrossAxisExtent;
             adjustAlignmentForChild(child, newOffset - originalOffset);
         }
     }
 }
 
 }