Track the region where text is painted.

Source/core/rendering/RenderFileUploadControl.cpp

 /*
  * Copyright (C) 2006, 2007, 2012 Apple 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.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 113 matching lines @@
         // Determine where the filename should be placed
         LayoutUnit contentLeft = paintOffset.x() + borderLeft() + paddingLeft();
         HTMLInputElement* button = uploadButton();
         if (!button)
             return;
 
         HTMLInputElement* input = static_cast<HTMLInputElement*>(node());
         LayoutUnit buttonWidth = nodeWidth(button);
         LayoutUnit buttonAndIconWidth = buttonWidth + afterButtonSpacing
             + (input->icon() ? iconWidth + iconFilenameSpacing : 0);
+        float textWidth = font.width(textRun);
         LayoutUnit textX;
         if (style()->isLeftToRightDirection())
             textX = contentLeft + buttonAndIconWidth;
         else
-            textX = contentLeft + contentWidth() - buttonAndIconWidth - font.width(textRun);
+            textX = contentLeft + contentWidth() - buttonAndIconWidth - textWidth;
 
         LayoutUnit textY = 0;
         // We want to match the button's baseline
         // FIXME: Make this work with transforms.
         if (RenderButton* buttonRenderer = toRenderButton(button->renderer()))
             textY = paintOffset.y() + borderTop() + paddingTop() + buttonRenderer->baselinePosition(AlphabeticBaseline, true, HorizontalLine, PositionOnContainingLine);
         else
             textY = baselinePosition(AlphabeticBaseline, true, HorizontalLine, PositionOnContainingLine);
+        FloatRect textRect(textX, textY - style()->fontMetrics().ascent(),
+                           textWidth, style()->fontMetrics().height());
 
         paintInfo.context->setFillColor(style()->visitedDependentColor(CSSPropertyColor), style()->colorSpace());
         
         // Draw the filename
-        paintInfo.context->drawBidiText(font, textRun, IntPoint(roundToInt(textX), roundToInt(textY)));
+        paintInfo.context->drawBidiText(font, textRun, IntPoint(roundToInt(textX), roundToInt(textY)), textRect);
         
         if (input->icon()) {
             // Determine where the icon should be placed
             LayoutUnit iconY = paintOffset.y() + borderTop() + paddingTop() + (contentHeight() - iconHeight) / 2;
             LayoutUnit iconX;
             if (style()->isLeftToRightDirection())
                 iconX = contentLeft + buttonWidth + afterButtonSpacing;
             else
                 iconX = contentLeft + contentWidth() - buttonWidth - afterButtonSpacing - iconWidth;
 
@@ skipping 81 matching lines @@
 }
 
 String RenderFileUploadControl::fileTextValue() const
 {
     HTMLInputElement* input = static_cast<HTMLInputElement*>(node());
     ASSERT(input->files());
     return theme()->fileListNameForWidth(input->files(), style()->font(), maxFilenameWidth(), input->multiple());
 }
     
 } // namespace WebCore