Track the region where text is painted.

Source/core/rendering/EllipsisBox.cpp

 /**
  * Copyright (C) 2003, 2006 Apple Computer, Inc.
  *
  * 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 39 matching lines @@
     if (selectionState() != RenderObject::SelectionNone) {
         paintSelection(context, paintOffset, style, font);
 
         // Select the correct color for painting the text.
         Color foreground = paintInfo.forceBlackText() ? Color::black : renderer()->selectionForegroundColor();
         if (foreground.isValid() && foreground != textColor)
             context->setFillColor(foreground, style->colorSpace());
     }
 
     // FIXME: Why is this always LTR? Fix by passing correct text run flags below.
-    context->drawText(font, RenderBlock::constructTextRun(renderer(), font, m_str, style, TextRun::AllowTrailingExpansion), LayoutPoint(x() + paintOffset.x(), y() + paintOffset.y() + style->fontMetrics().ascent()));
+    FloatPoint boxOrigin(paintOffset);
+    boxOrigin.move(x(), y());
+    FloatPoint textOrigin(boxOrigin.x(), boxOrigin.y() + style->fontMetrics().ascent());
+    TextRun textRun = RenderBlock::constructTextRun(renderer(), font, m_str, style, TextRun::AllowTrailingExpansion);
+    TextRunPaintInfo textRunPaintInfo(textRun);
+    textRunPaintInfo.bounds = FloatRect(boxOrigin, FloatSize(logicalWidth(), logicalHeight()));
+    context->drawText(font, textRunPaintInfo, textOrigin);
 
     // Restore the regular fill color.
     if (textColor != context->fillColor())
         context->setFillColor(textColor, style->colorSpace());
 
     if (setShadow)
         context->clearShadow();
 
     paintMarkupBox(paintInfo, paintOffset, lineTop, lineBottom, style);
 }
@@ skipping 78 matching lines @@
     if (visibleToHitTestRequest(request) && boundsRect.intersects(HitTestLocation::rectForPoint(locationInContainer.point(), 0, 0, 0, 0))) {
         renderer()->updateHitTestResult(result, locationInContainer.point() - toLayoutSize(adjustedLocation));
         if (!result.addNodeToRectBasedTestResult(renderer()->node(), request, locationInContainer, boundsRect))
             return true;
     }
 
     return false;
 }
 
 } // namespace WebCore