Convert RenderBlockFlow code to use FloatingObject references

Source/core/layout/LayoutBlockFlowLine.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 653 matching lines @@
 
         // Position is used to properly position both replaced elements and
         // to update the static normal flow x/y of positioned elements.
         if (r->m_object->isText())
             toLayoutText(r->m_object)->positionLineBox(r->m_box);
         else if (r->m_object->isBox())
             toLayoutBox(r->m_object)->positionLineBox(r->m_box);
     }
 }
 
-void LayoutBlockFlow::appendFloatingObjectToLastLine(FloatingObject* floatingObject)
+void LayoutBlockFlow::appendFloatingObjectToLastLine(FloatingObject& floatingObject)
 {
-    ASSERT(!floatingObject->originatingLine());
-    floatingObject->setOriginatingLine(lastRootBox());
-    lastRootBox()->appendFloat(floatingObject->layoutObject());
+    ASSERT(!floatingObject.originatingLine());
+    floatingObject.setOriginatingLine(lastRootBox());
+    lastRootBox()->appendFloat(floatingObject.layoutObject());
 }
 
 // This function constructs line boxes for all of the text runs in the resolver and computes their position.
 RootInlineBox* LayoutBlockFlow::createLineBoxesFromBidiRuns(unsigned bidiLevel, BidiRunList<BidiRun>& bidiRuns, const InlineIterator& end, LineInfo& lineInfo, VerticalPositionCache& verticalPositionCache, BidiRun* trailingSpaceRun, WordMeasurements& wordMeasurements)
 {
     if (!bidiRuns.runCount())
         return 0;
 
     // FIXME: Why is this only done when we had runs?
     lineInfo.setLastLine(!end.object());
@@ skipping 294 matching lines @@
     FloatingObjectSetIterator end = floatingObjectSet.end();
     if (layoutState.lastFloat()) {
         FloatingObjectSetIterator lastFloatIterator = floatingObjectSet.find(layoutState.lastFloat());
         ASSERT(lastFloatIterator != end);
         ++lastFloatIterator;
         it = lastFloatIterator;
     }
 
     bool floatChangedSize = false;
     for (; it != end; ++it) {
-        FloatingObject* f = it->get();
-        appendFloatingObjectToLastLine(f);
+        FloatingObject& floatingObject = *it->get();
+        appendFloatingObjectToLastLine(floatingObject);
         if (updateFloatIndex) {
-            ASSERT(f->layoutObject() == layoutState.floats()[layoutState.floatIndex()].object);
+            ASSERT(floatingObject.layoutObject() == layoutState.floats()[layoutState.floatIndex()].object);
             // If a float's geometry has changed, give up on syncing with clean lines.
-            if (layoutState.floats()[layoutState.floatIndex()].rect != f->frameRect())
+            if (layoutState.floats()[layoutState.floatIndex()].rect != floatingObject.frameRect())
                 floatChangedSize = true;
             layoutState.setFloatIndex(layoutState.floatIndex() + 1);
         }
     }
     layoutState.setLastFloat(!floatingObjectSet.isEmpty() ? floatingObjectSet.last().get() : 0);
     return floatChangedSize;
 }
 
 void LayoutBlockFlow::linkToEndLineIfNeeded(LineLayoutState& layoutState)
 {
@@ skipping 800 matching lines @@
 
     RootInlineBox* lastLine = layoutState.endLine();
     while (RootInlineBox* nextLine = lastLine->nextRootBox())
         lastLine = nextLine;
 
     LayoutUnit logicalBottom = lastLine->lineBottomWithLeading() + absoluteValue(lineDelta);
 
     const FloatingObjectSet& floatingObjectSet = m_floatingObjects->set();
     FloatingObjectSetIterator end = floatingObjectSet.end();
     for (FloatingObjectSetIterator it = floatingObjectSet.begin(); it != end; ++it) {
-        FloatingObject* floatingObject = it->get();
+        const FloatingObject& floatingObject = *it->get();
         if (logicalBottomForFloat(floatingObject) >= logicalTop && logicalBottomForFloat(floatingObject) < logicalBottom)
             return false;
     }
 
     return true;
 }
 
 bool LayoutBlockFlow::matchedEndLine(LineLayoutState& layoutState, const InlineBidiResolver& resolver, const InlineIterator& endLineStart, const BidiStatus& endLineStatus)
 {
     if (resolver.position() == endLineStart) {
@@ skipping 128 matching lines @@
                 if (ltr)
                     curr->adjustLogicalPosition(logicalLeft, 0);
                 else
                     curr->adjustLogicalPosition(logicalLeft - (availableLogicalWidth - totalLogicalWidth), 0);
             }
         }
         firstLine = false;
     }
 }
 
-bool LayoutBlockFlow::positionNewFloatOnLine(FloatingObject* newFloat, FloatingObject* lastFloatFromPreviousLine, LineInfo& lineInfo, LineWidth& width)
+bool LayoutBlockFlow::positionNewFloatOnLine(FloatingObject& newFloat, FloatingObject* lastFloatFromPreviousLine, LineInfo& lineInfo, LineWidth& width)
 {
     if (!positionNewFloats(&width))
         return false;
 
     // We only connect floats to lines for pagination purposes if the floats occur at the start of
     // the line and the previous line had a hard break (so this line is either the first in the block
     // or follows a <br>).
-    if (!newFloat->paginationStrut() || !lineInfo.previousLineBrokeCleanly() || !lineInfo.isEmpty())
+    if (!newFloat.paginationStrut() || !lineInfo.previousLineBrokeCleanly() || !lineInfo.isEmpty())
         return true;
 
     const FloatingObjectSet& floatingObjectSet = m_floatingObjects->set();
-    ASSERT(floatingObjectSet.last() == newFloat);
+    ASSERT(floatingObjectSet.last() == &newFloat);
 
     LayoutUnit floatLogicalTop = logicalTopForFloat(newFloat);
-    int paginationStrut = newFloat->paginationStrut();
+    int paginationStrut = newFloat.paginationStrut();
 
     if (floatLogicalTop - paginationStrut != logicalHeight() + lineInfo.floatPaginationStrut())
         return true;
 
     FloatingObjectSetIterator it = floatingObjectSet.end();
     --it; // Last float is newFloat, skip that one.
     FloatingObjectSetIterator begin = floatingObjectSet.begin();
     while (it != begin) {
         --it;
-        FloatingObject* floatingObject = it->get();
-        if (floatingObject == lastFloatFromPreviousLine)
+        FloatingObject& floatingObject = *it->get();
+        if (&floatingObject == lastFloatFromPreviousLine)
             break;
         if (logicalTopForFloat(floatingObject) == logicalHeight() + lineInfo.floatPaginationStrut()) {
-            floatingObject->setPaginationStrut(paginationStrut + floatingObject->paginationStrut());
-            LayoutBox* floatBox = floatingObject->layoutObject();
+            floatingObject.setPaginationStrut(paginationStrut + floatingObject.paginationStrut());
+            LayoutBox* floatBox = floatingObject.layoutObject();
             setLogicalTopForChild(*floatBox, logicalTopForChild(*floatBox) + marginBeforeForChild(*floatBox) + paginationStrut);
             if (floatBox->isLayoutBlock())
                 floatBox->forceChildLayout();
             else
                 floatBox->layoutIfNeeded();
             // Save the old logical top before calling removePlacedObject which will set
             // isPlaced to false. Otherwise it will trigger an assert in logicalTopForFloat.
             LayoutUnit oldLogicalTop = logicalTopForFloat(floatingObject);
             m_floatingObjects->removePlacedObject(floatingObject);
             setLogicalTopForFloat(floatingObject, oldLogicalTop + paginationStrut);
@@ skipping 19 matching lines @@
     LayoutUnit logicalLeft = logicalLeftOffsetForLine(logicalHeight(), false);
     LayoutUnit availableLogicalWidth = logicalRightOffsetForLine(logicalHeight(), false) - logicalLeft;
     updateLogicalWidthForAlignment(textAlign, 0, 0, logicalLeft, totalLogicalWidth, availableLogicalWidth, 0);
 
     if (!style()->isLeftToRightDirection())
         return logicalWidth() - logicalLeft;
     return logicalLeft;
 }
 
 }