Minimize RenderObject* casting to RenderText*

Source/core/rendering/InlineTextBox.cpp

 /*
  * (C) 1999 Lars Knoll (knoll@kde.org)
  * (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 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.
  *
@@ skipping 187 matching lines @@
     int sPos = std::max(startPos - m_start, 0);
     int ePos = std::min(endPos - m_start, (int)m_len);
 
     if (sPos > ePos)
         return LayoutRect();
 
     FontCachePurgePreventer fontCachePurgePreventer;
 
     LayoutUnit selTop = selectionTop();
     LayoutUnit selHeight = selectionHeight();
-    RenderStyle* styleToUse = textRenderer().style(isFirstLineStyle());
+    RenderStyle* styleToUse = renderer().style(isFirstLineStyle());
     const Font& font = styleToUse->font();
 
     StringBuilder charactersWithHyphen;
     bool respectHyphen = ePos == m_len && hasHyphen();
     TextRun textRun = constructTextRun(styleToUse, font, respectHyphen ? &charactersWithHyphen : 0);
 
     FloatPoint startingPoint = FloatPoint(logicalLeft(), selTop.toFloat());
     LayoutRect r;
     if (sPos || ePos != static_cast<int>(m_len))
         r = enclosingIntRect(font.selectionRectForText(textRun, startingPoint, selHeight, sPos, ePos));
     else // Avoid computing the font width when the entire line box is selected as an optimization.
         r = enclosingIntRect(FloatRect(startingPoint, FloatSize(m_logicalWidth, selHeight.toFloat())));
 
     LayoutUnit logicalWidth = r.width();
     if (r.x() > logicalRight())
         logicalWidth  = 0;
     else if (r.maxX() > logicalRight())
         logicalWidth = logicalRight() - r.x();
 
     LayoutPoint topPoint = isHorizontal() ? LayoutPoint(r.x(), selTop) : LayoutPoint(selTop, r.x());
     LayoutUnit width = isHorizontal() ? logicalWidth : selHeight;
     LayoutUnit height = isHorizontal() ? selHeight : logicalWidth;
 
     return LayoutRect(topPoint, LayoutSize(width, height));
 }
 
 void InlineTextBox::deleteLine()
 {
-    toRenderText(renderer()).removeTextBox(this);
+    renderer().removeTextBox(this);
     destroy();
 }
 
 void InlineTextBox::extractLine()
 {
     if (extracted())
         return;
 
-    toRenderText(renderer()).extractTextBox(this);
+    renderer().extractTextBox(this);
 }
 
 void InlineTextBox::attachLine()
 {
     if (!extracted())
         return;
 
-    toRenderText(renderer()).attachTextBox(this);
+    renderer().attachTextBox(this);
 }
 
 float InlineTextBox::placeEllipsisBox(bool flowIsLTR, float visibleLeftEdge, float visibleRightEdge, float ellipsisWidth, float &truncatedWidth, bool& foundBox)
 {
     if (foundBox) {
         m_truncation = cFullTruncation;
         return -1;
     }
 
     // For LTR this is the left edge of the box, for RTL, the right edge in parent coordinates.
@@ skipping 33 matching lines @@
             m_truncation = cFullTruncation;
             truncatedWidth += ellipsisWidth;
             return std::min(ellipsisX, logicalLeft());
         }
 
         // Set the truncation index on the text run.
         m_truncation = offset;
 
         // If we got here that means that we were only partially truncated and we need to return the pixel offset at which
         // to place the ellipsis.
-        float widthOfVisibleText = toRenderText(renderer()).width(m_start, offset, textPos(), flowIsLTR ? LTR : RTL, isFirstLineStyle());
+        float widthOfVisibleText = renderer().width(m_start, offset, textPos(), flowIsLTR ? LTR : RTL, isFirstLineStyle());
 
         // The ellipsis needs to be placed just after the last visible character.
         // Where "after" is defined by the flow directionality, not the inline
         // box directionality.
         // e.g. In the case of an LTR inline box truncated in an RTL flow then we can
         // have a situation such as |Hello| -> |...He|
         truncatedWidth += widthOfVisibleText + ellipsisWidth;
         if (flowIsLTR)
             return logicalLeft() + widthOfVisibleText;
         else
@@ skipping 27 matching lines @@
     if (mode & TextModeStroke) {
         if (strokeColor != context->strokeColor())
             context->setStrokeColor(strokeColor);
         if (strokeThickness != context->strokeThickness())
             context->setStrokeThickness(strokeThickness);
     }
 }
 
 bool InlineTextBox::isLineBreak() const
 {
-    return renderer().isBR() || (renderer().style()->preserveNewline() && len() == 1 && (*textRenderer().text().impl())[start()] == '\n');
+    return renderer().isBR() || (renderer().style()->preserveNewline() && len() == 1 && (*renderer().text().impl())[start()] == '\n');
 }
 
 bool InlineTextBox::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, LayoutUnit /* lineTop */, LayoutUnit /*lineBottom*/)
 {
     if (isLineBreak())
         return false;
 
     FloatPoint boxOrigin = locationIncludingFlipping();
     boxOrigin.moveBy(accumulatedOffset);
     FloatRect rect(boxOrigin, size());
@@ skipping 197 matching lines @@
     // subpixel boundaries on the x-axis and thus there is no reason to
     // snap the x value. We still round the y-axis to ensure consistent
     // line heights.
     LayoutPoint adjustedPaintOffset = RuntimeEnabledFeatures::subpixelFontScalingEnabled()
         ? LayoutPoint(paintOffset.x(), paintOffset.y().round())
         : roundedIntPoint(paintOffset);
 
     if (logicalStart >= paintEnd || logicalStart + logicalExtent <= paintStart)
         return;
 
-    bool isPrinting = textRenderer().document().printing();
+    bool isPrinting = renderer().document().printing();
 
     // Determine whether or not we're selected.
     bool haveSelection = !isPrinting && paintInfo.phase != PaintPhaseTextClip && selectionState() != RenderObject::SelectionNone;
     if (!haveSelection && paintInfo.phase == PaintPhaseSelection)
         // When only painting the selection, don't bother to paint if there is none.
         return;
 
     if (m_truncation != cNoTruncation) {
         if (renderer().containingBlock()->style()->isLeftToRightDirection() != isLeftToRightDirection()) {
             // Make the visible fragment of text hug the edge closest to the rest of the run by moving the origin
             // at which we start drawing text.
             // e.g. In the case of LTR text truncated in an RTL Context, the correct behavior is:
             // |Hello|CBA| -> |...He|CBA|
             // In order to draw the fragment "He" aligned to the right edge of it's box, we need to start drawing
             // farther to the right.
             // NOTE: WebKit's behavior differs from that of IE which appears to just overlay the ellipsis on top of the
             // truncated string i.e.  |Hello|CBA| -> |...lo|CBA|
-            LayoutUnit widthOfVisibleText = toRenderText(renderer()).width(m_start, m_truncation, textPos(), isLeftToRightDirection() ? LTR : RTL, isFirstLineStyle());
+            LayoutUnit widthOfVisibleText = renderer().width(m_start, m_truncation, textPos(), isLeftToRightDirection() ? LTR : RTL, isFirstLineStyle());
             LayoutUnit widthOfHiddenText = m_logicalWidth - widthOfVisibleText;
             // FIXME: The hit testing logic also needs to take this translation into account.
             LayoutSize truncationOffset(isLeftToRightDirection() ? widthOfHiddenText : -widthOfHiddenText, 0);
             adjustedPaintOffset.move(isHorizontal() ? truncationOffset : truncationOffset.transposedSize());
         }
     }
 
     GraphicsContext* context = paintInfo.context;
     RenderStyle* styleToUse = renderer().style(isFirstLineStyle());
 
     adjustedPaintOffset.move(0, styleToUse->isHorizontalWritingMode() ? 0 : -logicalHeight());
 
     FloatPoint boxOrigin = locationIncludingFlipping();
     boxOrigin.move(adjustedPaintOffset.x().toFloat(), adjustedPaintOffset.y().toFloat());
     FloatRect boxRect(boxOrigin, LayoutSize(logicalWidth(), logicalHeight()));
 
-    RenderCombineText* combinedText = styleToUse->hasTextCombine() && textRenderer().isCombineText() && toRenderCombineText(textRenderer()).isCombined() ? &toRenderCombineText(textRenderer()) : 0;
+    RenderCombineText* combinedText = styleToUse->hasTextCombine() && renderer().isCombineText() && toRenderCombineText(renderer()).isCombined() ? &toRenderCombineText(renderer()) : 0;
 
     bool shouldRotate = !isHorizontal() && !combinedText;
     if (shouldRotate)
         context->concatCTM(rotation(boxRect, Clockwise));
 
     // Determine whether or not we have composition underlines to draw.
     bool containsComposition = renderer().node() && renderer().frame()->inputMethodController().compositionNode() == renderer().node();
     bool useCustomUnderlines = containsComposition && renderer().frame()->inputMethodController().compositionUsesCustomUnderlines();
 
     // Determine text colors.
-    TextPaintingStyle textStyle = textPaintingStyle(textRenderer(), styleToUse, paintInfo.forceBlackText(), isPrinting);
-    TextPaintingStyle selectionStyle = selectionPaintingStyle(textRenderer(), haveSelection, paintInfo.forceBlackText(), isPrinting, textStyle);
+    TextPaintingStyle textStyle = textPaintingStyle(renderer(), styleToUse, paintInfo.forceBlackText(), isPrinting);
+    TextPaintingStyle selectionStyle = selectionPaintingStyle(renderer(), haveSelection, paintInfo.forceBlackText(), isPrinting, textStyle);
     bool paintSelectedTextOnly = (paintInfo.phase == PaintPhaseSelection);
     bool paintSelectedTextSeparately = !paintSelectedTextOnly && textStyle != selectionStyle;
 
     // Set our font.
     const Font& font = styleToUse->font();
 
     FloatPoint textOrigin = FloatPoint(boxOrigin.x(), boxOrigin.y() + font.fontMetrics().ascent());
     if (combinedText)
         combinedText->adjustTextOrigin(textOrigin, boxRect);
 
     // 1. Paint backgrounds behind text if needed. Examples of such backgrounds include selection
     // and composition highlights.
     if (paintInfo.phase != PaintPhaseSelection && paintInfo.phase != PaintPhaseTextClip && !isPrinting) {
         if (containsComposition) {
             paintCompositionBackgrounds(context, boxOrigin, styleToUse, font, useCustomUnderlines);
         }
 
         paintDocumentMarkers(context, boxOrigin, styleToUse, font, true);
 
         if (haveSelection && !useCustomUnderlines)
             paintSelection(context, boxOrigin, styleToUse, font, selectionStyle.fillColor);
     }
 
     // 2. Now paint the foreground, including text and decorations like underline/overline (in quirks mode only).
     int length = m_len;
     int maximumLength;
     StringView string;
     if (!combinedText) {
-        string = textRenderer().text().createView();
+        string = renderer().text().createView();
         if (static_cast<unsigned>(length) != string.length() || m_start)
             string.narrow(m_start, length);
-        maximumLength = textRenderer().textLength() - m_start;
+        maximumLength = renderer().textLength() - m_start;
     } else {
         combinedText->getStringToRender(m_start, string, length);
         maximumLength = length;
     }
 
     StringBuilder charactersWithHyphen;
     TextRun textRun = constructTextRun(styleToUse, font, string, maximumLength, hasHyphen() ? &charactersWithHyphen : 0);
     if (hasHyphen())
         length = textRun.length();
 
@@ skipping 74 matching lines @@
 
     if (shouldRotate)
         context->concatCTM(rotation(boxRect, Counterclockwise));
 }
 
 void InlineTextBox::selectionStartEnd(int& sPos, int& ePos)
 {
     int startPos, endPos;
     if (renderer().selectionState() == RenderObject::SelectionInside) {
         startPos = 0;
-        endPos = textRenderer().textLength();
+        endPos = renderer().textLength();
     } else {
-        textRenderer().selectionStartEnd(startPos, endPos);
+        renderer().selectionStartEnd(startPos, endPos);
         if (renderer().selectionState() == RenderObject::SelectionStart)
-            endPos = textRenderer().textLength();
+            endPos = renderer().textLength();
         else if (renderer().selectionState() == RenderObject::SelectionEnd)
             startPos = 0;
     }
 
     sPos = std::max(startPos - m_start, 0);
     ePos = std::min(endPos - m_start, (int)m_len);
 }
 
 void InlineTextBox::paintSelection(GraphicsContext* context, const FloatPoint& boxOrigin, RenderStyle* style, const Font& font, Color textColor)
 {
@@ skipping 14 matching lines @@
     // background.
     if (textColor == c)
         c = Color(0xff - c.red(), 0xff - c.green(), 0xff - c.blue());
 
     GraphicsContextStateSaver stateSaver(*context);
     updateGraphicsContext(context, c, c, 0); // Don't draw text at all!
 
     // If the text is truncated, let the thing being painted in the truncation
     // draw its own highlight.
     int length = m_truncation != cNoTruncation ? m_truncation : m_len;
-    StringView string = textRenderer().text().createView();
+    StringView string = renderer().text().createView();
 
     if (string.length() != static_cast<unsigned>(length) || m_start)
         string.narrow(m_start, length);
 
     StringBuilder charactersWithHyphen;
     bool respectHyphen = ePos == length && hasHyphen();
-    TextRun textRun = constructTextRun(style, font, string, textRenderer().textLength() - m_start, respectHyphen ? &charactersWithHyphen : 0);
+    TextRun textRun = constructTextRun(style, font, string, renderer().textLength() - m_start, respectHyphen ? &charactersWithHyphen : 0);
     if (respectHyphen)
         ePos = textRun.length();
 
     LayoutUnit selectionBottom = root().selectionBottom();
     LayoutUnit selectionTop = root().selectionTopAdjustedForPrecedingBlock();
 
     int deltaY = roundToInt(renderer().style()->isFlippedLinesWritingMode() ? selectionBottom - logicalBottom() : logicalTop() - selectionTop);
     int selHeight = std::max(0, roundToInt(selectionBottom - selectionTop));
 
     FloatPoint localOrigin(boxOrigin.x(), boxOrigin.y() - deltaY);
@@ skipping 249 matching lines @@
 {
     GraphicsContextStateSaver stateSaver(*context);
 
     if (m_truncation == cFullTruncation)
         return;
 
     FloatPoint localOrigin = boxOrigin;
 
     float width = m_logicalWidth;
     if (m_truncation != cNoTruncation) {
-        width = toRenderText(renderer()).width(m_start, m_truncation, textPos(), isLeftToRightDirection() ? LTR : RTL, isFirstLineStyle());
+        width = renderer().width(m_start, m_truncation, textPos(), isLeftToRightDirection() ? LTR : RTL, isFirstLineStyle());
         if (!isLeftToRightDirection())
             localOrigin.move(m_logicalWidth - width, 0);
     }
 
     // Get the text decoration colors.
     RenderObject::AppliedTextDecoration underline, overline, linethrough;
 
     renderer().getTextDecorations(deco, underline, overline, linethrough, true);
     if (isFirstLineStyle())
         renderer().getTextDecorations(deco, underline, overline, linethrough, true, true);
 
     // Use a special function for underlines to get the positioning exactly right.
-    bool isPrinting = textRenderer().document().printing();
+    bool isPrinting = renderer().document().printing();
 
     bool linesAreOpaque = !isPrinting && (!(deco & TextDecorationUnderline) || underline.color.alpha() == 255) && (!(deco & TextDecorationOverline) || overline.color.alpha() == 255) && (!(deco & TextDecorationLineThrough) || linethrough.color.alpha() == 255);
 
     RenderStyle* styleToUse = renderer().style(isFirstLineStyle());
     int baseline = styleToUse->fontMetrics().ascent();
 
     size_t shadowCount = shadowList ? shadowList->shadows().size() : 0;
     // Set the thick of the line to be 10% (or something else ?)of the computed font size and not less than 1px.
     // Using computedFontSize should take care of zoom as well.
 
@@ skipping 66 matching lines @@
         return GraphicsContext::DocumentMarkerGrammarLineStyle;
     default:
         ASSERT_NOT_REACHED();
         return GraphicsContext::DocumentMarkerSpellingLineStyle;
     }
 }
 
 void InlineTextBox::paintDocumentMarker(GraphicsContext* pt, const FloatPoint& boxOrigin, DocumentMarker* marker, RenderStyle* style, const Font& font, bool grammar)
 {
     // Never print spelling/grammar markers (5327887)
-    if (textRenderer().document().printing())
+    if (renderer().document().printing())
         return;
 
     if (m_truncation == cFullTruncation)
         return;
 
     float start = 0; // start of line to draw, relative to tx
     float width = m_logicalWidth; // how much line to draw
 
     // Determine whether we need to measure text
     bool markerSpansWholeBox = true;
@@ skipping 156 matching lines @@
 void InlineTextBox::paintCompositionUnderline(GraphicsContext* ctx, const FloatPoint& boxOrigin, const CompositionUnderline& underline)
 {
     if (m_truncation == cFullTruncation)
         return;
 
     unsigned paintStart = underlinePaintStart(underline);
     unsigned paintEnd = underlinePaintEnd(underline);
 
     // start of line to draw, relative to paintOffset.
     float start = paintStart == static_cast<unsigned>(m_start) ? 0 :
-        toRenderText(renderer()).width(m_start, paintStart - m_start, textPos(), isLeftToRightDirection() ? LTR : RTL, isFirstLineStyle());
+        renderer().width(m_start, paintStart - m_start, textPos(), isLeftToRightDirection() ? LTR : RTL, isFirstLineStyle());
     // how much line to draw
     float width = (paintStart == static_cast<unsigned>(m_start) && paintEnd == static_cast<unsigned>(end()) + 1) ? m_logicalWidth :
-        toRenderText(renderer()).width(paintStart, paintEnd - paintStart, textPos() + start, isLeftToRightDirection() ? LTR : RTL, isFirstLineStyle());
+        renderer().width(paintStart, paintEnd - paintStart, textPos() + start, isLeftToRightDirection() ? LTR : RTL, isFirstLineStyle());
 
     // Thick marked text underlines are 2px thick as long as there is room for the 2px line under the baseline.
     // All other marked text underlines are 1px thick.
     // If there's not enough space the underline will touch or overlap characters.
     int lineThickness = 1;
     int baseline = renderer().style(isFirstLineStyle())->fontMetrics().ascent();
     if (underline.thick && logicalHeight() - baseline >= 2)
         lineThickness = 2;
 
     // We need to have some space between underlines of subsequent clauses, because some input methods do not use different underline styles for those.
     // We make each line shorter, which has a harmless side effect of shortening the first and last clauses, too.
     start += 1;
     width -= 2;
 
     ctx->setStrokeColor(underline.color);
     ctx->setStrokeThickness(lineThickness);
-    ctx->drawLineForText(FloatPoint(boxOrigin.x() + start, boxOrigin.y() + logicalHeight() - lineThickness), width, textRenderer().document().printing());
+    ctx->drawLineForText(FloatPoint(boxOrigin.x() + start, boxOrigin.y() + logicalHeight() - lineThickness), width, renderer().document().printing());
 }
 
 int InlineTextBox::caretMinOffset() const
 {
     return m_start;
 }
 
 int InlineTextBox::caretMaxOffset() const
 {
     return m_start + m_len;
@@ skipping 13 matching lines @@
     if (isLineBreak())
         return 0;
 
     if (lineOffset - logicalLeft() > logicalWidth())
         return isLeftToRightDirection() ? len() : 0;
     if (lineOffset - logicalLeft() < 0)
         return isLeftToRightDirection() ? 0 : len();
 
     FontCachePurgePreventer fontCachePurgePreventer;
 
-    RenderText& text = toRenderText(renderer());
+    RenderText& text = renderer();
     RenderStyle* style = text.style(isFirstLineStyle());
     const Font& font = style->font();
     return font.offsetForPosition(constructTextRun(style, font), lineOffset - logicalLeft(), includePartialGlyphs);
 }
 
 float InlineTextBox::positionForOffset(int offset) const
 {
     ASSERT(offset >= m_start);
     ASSERT(offset <= m_start + m_len);
 
     if (isLineBreak())
         return logicalLeft();
 
     FontCachePurgePreventer fontCachePurgePreventer;
 
-    RenderText& text = toRenderText(renderer());
+    RenderText& text = renderer();
     RenderStyle* styleToUse = text.style(isFirstLineStyle());
     ASSERT(styleToUse);
     const Font& font = styleToUse->font();
     int from = !isLeftToRightDirection() ? offset - m_start : 0;
     int to = !isLeftToRightDirection() ? m_len : offset - m_start;
     // FIXME: Do we need to add rightBearing here?
     return font.selectionRectForText(constructTextRun(styleToUse, font), IntPoint(logicalLeft(), 0), 0, from, to).maxX();
 }
 
 bool InlineTextBox::containsCaretOffset(int offset) const
@@ skipping 17 matching lines @@
         return false;
 
     // Offsets at the end are "in" for normal boxes (but the caller has to check affinity).
     return true;
 }
 
 void InlineTextBox::characterWidths(Vector<float>& widths) const
 {
     FontCachePurgePreventer fontCachePurgePreventer;
 
-    RenderStyle* styleToUse = textRenderer().style(isFirstLineStyle());
+    RenderStyle* styleToUse = renderer().style(isFirstLineStyle());
     const Font& font = styleToUse->font();
 
     TextRun textRun = constructTextRun(styleToUse, font);
 
     GlyphBuffer glyphBuffer;
     WidthIterator it(&font, textRun);
     float lastWidth = 0;
     widths.resize(m_len);
     for (unsigned i = 0; i < m_len; i++) {
         it.advance(i + 1, &glyphBuffer);
         widths[i] = it.m_runWidthSoFar - lastWidth;
         lastWidth = it.m_runWidthSoFar;
     }
 }
 
 TextRun InlineTextBox::constructTextRun(RenderStyle* style, const Font& font, StringBuilder* charactersWithHyphen) const
 {
     ASSERT(style);
-    ASSERT(textRenderer().text());
+    ASSERT(renderer().text());
 
-    StringView string = textRenderer().text().createView();
+    StringView string = renderer().text().createView();
     unsigned startPos = start();
     unsigned length = len();
 
     if (string.length() != length || startPos)
         string.narrow(startPos, length);
 
-    return constructTextRun(style, font, string, textRenderer().textLength() - startPos, charactersWithHyphen);
+    return constructTextRun(style, font, string, renderer().textLength() - startPos, charactersWithHyphen);
 }
 
 TextRun InlineTextBox::constructTextRun(RenderStyle* style, const Font& font, StringView string, int maximumLength, StringBuilder* charactersWithHyphen) const
 {
     ASSERT(style);
 
     if (charactersWithHyphen) {
         const AtomicString& hyphenString = style->hyphenString();
         charactersWithHyphen->reserveCapacity(string.length() + hyphenString.length());
         charactersWithHyphen->append(string);
         charactersWithHyphen->append(hyphenString);
         string = charactersWithHyphen->toString().createView();
         maximumLength = string.length();
     }
 
     ASSERT(maximumLength >= static_cast<int>(string.length()));
 
-    TextRun run(string, textPos(), expansion(), expansionBehavior(), direction(), dirOverride() || style->rtlOrdering() == VisualOrder, !textRenderer().canUseSimpleFontCodePath());
+    TextRun run(string, textPos(), expansion(), expansionBehavior(), direction(), dirOverride() || style->rtlOrdering() == VisualOrder, !renderer().canUseSimpleFontCodePath());
     run.setTabSize(!style->collapseWhiteSpace(), style->tabSize());
-    run.setCharacterScanForCodePath(!textRenderer().canUseSimpleFontCodePath());
+    run.setCharacterScanForCodePath(!renderer().canUseSimpleFontCodePath());
     if (textRunNeedsRenderingContext(font))
-        run.setRenderingContext(SVGTextRunRenderingContext::create(&textRenderer()));
+        run.setRenderingContext(SVGTextRunRenderingContext::create(&renderer()));
 
     // Propagate the maximum length of the characters buffer to the TextRun, even when we're only processing a substring.
     run.setCharactersLength(maximumLength);
     ASSERT(run.charactersLength() >= run.length());
     return run;
 }
 
 TextRun InlineTextBox::constructTextRunForInspector(RenderStyle* style, const Font& font) const
 {
     return InlineTextBox::constructTextRun(style, font);
 }
 
 #ifndef NDEBUG
 
 const char* InlineTextBox::boxName() const
 {
     return "InlineTextBox";
 }
 
 void InlineTextBox::showBox(int printedCharacters) const
 {
-    const RenderText& obj = toRenderText(renderer());
+    const RenderText& obj = renderer();
     String value = obj.text();
     value = value.substring(start(), len());
     value.replaceWithLiteral('\\', "\\\\");
     value.replaceWithLiteral('\n', "\\n");
     printedCharacters += fprintf(stderr, "%s\t%p", boxName(), this);
     for (; printedCharacters < showTreeCharacterOffset; printedCharacters++)
         fputc(' ', stderr);
     printedCharacters = fprintf(stderr, "\t%s %p", obj.renderName(), &obj);
     const int rendererCharacterOffset = 24;
     for (; printedCharacters < rendererCharacterOffset; printedCharacters++)
         fputc(' ', stderr);
     fprintf(stderr, "(%d,%d) \"%s\"\n", start(), start() + len(), value.utf8().data());
 }
 
 #endif
 
 } // namespace blink