Merge 103206 - Positioned Floats: Assertion hit in fast/block/positioning/positioned-float-layout...

Source/WebCore/rendering/RenderBlockLineLayout.cpp

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All right reserved.
  * Copyright (C) 2010 Google 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 1843 matching lines @@
 // FIXME: The entire concept of the skipTrailingWhitespace function is flawed, since we really need to be building
 // line boxes even for containers that may ultimately collapse away. Otherwise we'll never get positioned
 // elements quite right. In other words, we need to build this function's work into the normal line
 // object iteration process.
 // NB. this function will insert any floating elements that would otherwise
 // be skipped but it will not position them.
 void RenderBlock::LineBreaker::skipTrailingWhitespace(InlineIterator& iterator, const LineInfo& lineInfo)
 {
     while (!iterator.atEnd() && !requiresLineBox(iterator, lineInfo, TrailingWhitespace)) {
         RenderObject* object = iterator.m_obj;
-        if (object->isFloating()) {
+        if (object->isPositioned())
+            setStaticPositions(m_block, toRenderBox(object));
+        else if (object->isFloating())
             m_block->insertFloatingObject(toRenderBox(object));
-        } else if (object->isPositioned())
-            setStaticPositions(m_block, toRenderBox(object));
         iterator.increment();
     }
 }
 
 void RenderBlock::LineBreaker::skipLeadingWhitespace(InlineBidiResolver& resolver, LineInfo& lineInfo,
                                                      FloatingObject* lastFloatFromPreviousLine, LineWidth& width)
 {
     while (!resolver.position().atEnd() && !requiresLineBox(resolver.position(), lineInfo, LeadingWhitespace)) {
         RenderObject* object = resolver.position().m_obj;
-        if (object->isFloating())
+        if (object->isPositioned())
+            setStaticPositions(m_block, toRenderBox(object));
+        else if (object->isFloating())
             m_block->positionNewFloatOnLine(m_block->insertFloatingObject(toRenderBox(object)), lastFloatFromPreviousLine, lineInfo, width);
-        else if (object->isPositioned())
-            setStaticPositions(m_block, toRenderBox(object));
         resolver.increment();
     }
     resolver.commitExplicitEmbedding();
 }
 
 // This is currently just used for list markers and inline flows that have line boxes. Neither should
 // have an effect on whitespace at the start of the line.
 static bool shouldSkipWhitespaceAfterStartObject(RenderBlock* block, RenderObject* o, LineMidpointState& lineMidpointState)
 {
     RenderObject* next = bidiNextSkippingEmptyInlines(block, o);
@@ skipping 253 matching lines @@
                     lineInfo.setEmpty(false, m_block, &width);
                 trailingObjects.clear();
                 lineInfo.setPreviousLineBrokeCleanly(true);
 
                 if (!lineInfo.isEmpty())
                     m_clear = current.m_obj->style()->clear();
             }
             goto end;
         }
 
-        if (current.m_obj->isFloating()) {
-            RenderBox* floatBox = toRenderBox(current.m_obj);
-            FloatingObject* f = m_block->insertFloatingObject(floatBox);
-            // check if it fits in the current line.
-            // If it does, position it now, otherwise, position
-            // it after moving to next line (in newLine() func)
-            if (floatsFitOnLine && width.fitsOnLine(m_block->logicalWidthForFloat(f))) {
-                m_block->positionNewFloatOnLine(f, lastFloatFromPreviousLine, lineInfo, width);
-                if (lBreak.m_obj == current.m_obj) {
-                    ASSERT(!lBreak.m_pos);
-                    lBreak.increment();
-                }
-            } else
-                floatsFitOnLine = false;
-        } else if (current.m_obj->isPositioned()) {
+        if (current.m_obj->isPositioned()) {
             // If our original display wasn't an inline type, then we can
             // go ahead and determine our static inline position now.
             RenderBox* box = toRenderBox(current.m_obj);
             bool isInlineType = box->style()->isOriginalDisplayInlineType();
             if (!isInlineType)
                 m_block->setStaticInlinePositionForChild(box, m_block->logicalHeight(), m_block->startOffsetForContent(m_block->logicalHeight()));
             else  {
                 // If our original display was an INLINE type, then we can go ahead
                 // and determine our static y position now.
                 box->layer()->setStaticBlockPosition(m_block->logicalHeight());
             }
 
             // If we're ignoring spaces, we have to stop and include this object and
             // then start ignoring spaces again.
             if (isInlineType || current.m_obj->container()->isRenderInline()) {
                 if (ignoringSpaces) {
                     ignoreStart.m_obj = current.m_obj;
                     ignoreStart.m_pos = 0;
                     addMidpoint(lineMidpointState, ignoreStart); // Stop ignoring spaces.
                     addMidpoint(lineMidpointState, ignoreStart); // Start ignoring again.
                 }
                 trailingObjects.appendBoxIfNeeded(box);
             } else
                 m_positionedObjects.append(box);
+        } else if (current.m_obj->isFloating()) {
+            RenderBox* floatBox = toRenderBox(current.m_obj);
+            FloatingObject* f = m_block->insertFloatingObject(floatBox);
+            // check if it fits in the current line.
+            // If it does, position it now, otherwise, position
+            // it after moving to next line (in newLine() func)
+            if (floatsFitOnLine && width.fitsOnLine(m_block->logicalWidthForFloat(f))) {
+                m_block->positionNewFloatOnLine(f, lastFloatFromPreviousLine, lineInfo, width);
+                if (lBreak.m_obj == current.m_obj) {
+                    ASSERT(!lBreak.m_pos);
+                    lBreak.increment();
+                }
+            } else
+                floatsFitOnLine = false;
         } else if (current.m_obj->isRenderInline()) {
             // Right now, we should only encounter empty inlines here.
             ASSERT(!current.m_obj->firstChild());
 
             RenderInline* flowBox = toRenderInline(current.m_obj);
 
             // Now that some inline flows have line boxes, if we are already ignoring spaces, we need
             // to make sure that we stop to include this object and then start ignoring spaces again.
             // If this object is at the start of the line, we need to behave like list markers and
             // start ignoring spaces.
@@ skipping 528 matching lines @@
     availableLogicalWidth = logicalRightOffsetForLine(logicalHeight(), false) - logicalLeft;
     float totalLogicalWidth = logicalWidthForChild(child);
     updateLogicalWidthForAlignment(textAlign, 0l, logicalLeft, totalLogicalWidth, availableLogicalWidth, 0);
 
     if (!style()->isLeftToRightDirection())
         return logicalWidth() - (logicalLeft + totalLogicalWidth);
     return logicalLeft;
 }
 
 }