Minor refactoring to avoid redundant calls to RenderObject::style()

Source/core/rendering/RenderListBox.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2011 Apple Inc. All rights reserved.
  *               2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 222 matching lines @@
     if (!style()->width().isPercent())
         minLogicalWidth = maxLogicalWidth;
 }
 
 void RenderListBox::computePreferredLogicalWidths()
 {
     ASSERT(!m_optionsChanged);
 
     m_minPreferredLogicalWidth = 0;
     m_maxPreferredLogicalWidth = 0;
+    RenderStyle* styleToUse = style();
 
-    if (style()->width().isFixed() && style()->width().value() > 0)
-        m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth = adjustContentBoxLogicalWidthForBoxSizing(style()->width().value());
+    if (styleToUse->width().isFixed() && styleToUse->width().value() > 0)
+        m_minPreferredLogicalWidth = m_maxPreferredLogicalWidth = adjustContentBoxLogicalWidthForBoxSizing(styleToUse->width().value());
     else
         computeIntrinsicLogicalWidths(m_minPreferredLogicalWidth, m_maxPreferredLogicalWidth);
 
-    if (style()->minWidth().isFixed() && style()->minWidth().value() > 0) {
-        m_maxPreferredLogicalWidth = max(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(style()->minWidth().value()));
-        m_minPreferredLogicalWidth = max(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(style()->minWidth().value()));
+    if (styleToUse->minWidth().isFixed() && styleToUse->minWidth().value() > 0) {
+        m_maxPreferredLogicalWidth = max(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->minWidth().value()));
+        m_minPreferredLogicalWidth = max(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->minWidth().value()));
     }
 
-    if (style()->maxWidth().isFixed()) {
-        m_maxPreferredLogicalWidth = min(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(style()->maxWidth().value()));
-        m_minPreferredLogicalWidth = min(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(style()->maxWidth().value()));
+    if (styleToUse->maxWidth().isFixed()) {
+        m_maxPreferredLogicalWidth = min(m_maxPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->maxWidth().value()));
+        m_minPreferredLogicalWidth = min(m_minPreferredLogicalWidth, adjustContentBoxLogicalWidthForBoxSizing(styleToUse->maxWidth().value()));
     }
 
     LayoutUnit toAdd = borderAndPaddingWidth();
     m_minPreferredLogicalWidth += toAdd;
     m_maxPreferredLogicalWidth += toAdd;
 
     clearPreferredLogicalWidthsDirty();
 }
 
 int RenderListBox::size() const
@@ skipping 749 matching lines @@
 {
     return itemBoundingBoxRectInternal(point, listIndexToRenderListBoxIndex(index));
 }
 
 bool RenderListBox::scrollToRevealElementAtListIndex(int index)
 {
     return scrollToRevealElementAtListIndexInternal(listIndexToRenderListBoxIndex(index));
 }
 
 } // namespace WebCore