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* 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
* Library General Public License for more details.
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
#include "config.h"
#include "core/rendering/EllipsisBox.h"
#include "core/platform/graphics/Font.h"
#include "core/platform/graphics/GraphicsContextStateSaver.h"
#include "core/rendering/HitTestResult.h"
#include "core/rendering/InlineTextBox.h"
#include "core/rendering/PaintInfo.h"
#include "core/rendering/RenderBlock.h"
#include "core/rendering/RootInlineBox.h"
#include "core/rendering/style/ShadowList.h"
#include "platform/graphics/DrawLooper.h"
#include "platform/graphics/TextRun.h"
namespace WebCore {
void EllipsisBox::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset, LayoutUnit lineTop, LayoutUnit lineBottom)
GraphicsContext* context = paintInfo.context;
RenderStyle* style = m_renderer->style(isFirstLineStyle());
Color styleTextColor = m_renderer->resolveColor(style, CSSPropertyWebkitTextFillColor);
if (styleTextColor != context->fillColor())
const Font& font = style->font();
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 != styleTextColor)
// Text shadows are disabled when printing.
const ShadowList* shadowList = context->printing() ? 0 : style->textShadow();
bool hasShadow = shadowList;
if (hasShadow) {
DrawLooper drawLooper;
for (size_t i = shadowList->shadows().size(); i--; ) {
const ShadowData& shadow = shadowList->shadows()[i];
int shadowX = isHorizontal() ? shadow.x() : shadow.y();
int shadowY = isHorizontal() ? shadow.y() : -shadow.x();
FloatSize offset(shadowX, shadowY);
drawLooper.addShadow(offset, shadow.blur(), m_renderer->resolveColor(shadow.color()),
DrawLooper::ShadowRespectsTransforms, DrawLooper::ShadowIgnoresAlpha);
// FIXME: Why is this always LTR? Fix by passing correct text run flags below.
FloatPoint boxOrigin(paintOffset);
boxOrigin.move(x(), y());
FloatRect boxRect(boxOrigin, LayoutSize(logicalWidth(), logicalHeight()));
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 = boxRect;
context->drawText(font, textRunPaintInfo, textOrigin);
// Restore the regular fill color.
if (styleTextColor != context->fillColor())
if (hasShadow)
paintMarkupBox(paintInfo, paintOffset, lineTop, lineBottom, style);
InlineBox* EllipsisBox::markupBox() const
if (!m_shouldPaintMarkupBox || !m_renderer->isRenderBlock())
return 0;
RenderBlock* block = toRenderBlock(m_renderer);
RootInlineBox* lastLine = block->lineAtIndex(block->lineCount() - 1);
if (!lastLine)
return 0;
// If the last line-box on the last line of a block is a link, -webkit-line-clamp paints that box after the ellipsis.
// It does not actually move the link.
InlineBox* anchorBox = lastLine->lastChild();
if (!anchorBox || !anchorBox->renderer()->style()->isLink())
return 0;
return anchorBox;
void EllipsisBox::paintMarkupBox(PaintInfo& paintInfo, const LayoutPoint& paintOffset, LayoutUnit lineTop, LayoutUnit lineBottom, RenderStyle* style)
InlineBox* markupBox = this->markupBox();
if (!markupBox)
LayoutPoint adjustedPaintOffset = paintOffset;
adjustedPaintOffset.move(x() + m_logicalWidth - markupBox->x(),
y() + style->fontMetrics().ascent() - (markupBox->y() + markupBox->renderer()->style(isFirstLineStyle())->fontMetrics().ascent()));
markupBox->paint(paintInfo, adjustedPaintOffset, lineTop, lineBottom);
IntRect EllipsisBox::selectionRect()
RenderStyle* style = m_renderer->style(isFirstLineStyle());
const Font& font = style->font();
// FIXME: Why is this always LTR? Fix by passing correct text run flags below.
return enclosingIntRect(font.selectionRectForText(RenderBlock::constructTextRun(renderer(), font, m_str, style, TextRun::AllowTrailingExpansion), IntPoint(x(), y() + root()->selectionTopAdjustedForPrecedingBlock()), root()->selectionHeightAdjustedForPrecedingBlock()));
void EllipsisBox::paintSelection(GraphicsContext* context, const LayoutPoint& paintOffset, RenderStyle* style, const Font& font)
Color textColor = m_renderer->resolveColor(style, CSSPropertyColor);
Color c = m_renderer->selectionBackgroundColor();
if (!c.isValid() || !c.alpha())
// If the text color ends up being the same as the selection background, invert the selection
// background.
if (textColor == c)
c = Color(0xff -, 0xff -, 0xff -;
GraphicsContextStateSaver stateSaver(*context);
LayoutUnit top = root()->selectionTop();
LayoutUnit h = root()->selectionHeight();
FloatRect clipRect(x() + paintOffset.x(), top + paintOffset.y(), m_logicalWidth, h);
// FIXME: Why is this always LTR? Fix by passing correct text run flags below.
context->drawHighlightForText(font, RenderBlock::constructTextRun(renderer(), font, m_str, style, TextRun::AllowTrailingExpansion), roundedIntPoint(LayoutPoint(x() + paintOffset.x(), y() + paintOffset.y() + top)), h, c);
bool EllipsisBox::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, LayoutUnit lineTop, LayoutUnit lineBottom)
LayoutPoint adjustedLocation = accumulatedOffset + roundedLayoutPoint(topLeft());
// Hit test the markup box.
if (InlineBox* markupBox = this->markupBox()) {
RenderStyle* style = m_renderer->style(isFirstLineStyle());
LayoutUnit mtx = adjustedLocation.x() + m_logicalWidth - markupBox->x();
LayoutUnit mty = adjustedLocation.y() + style->fontMetrics().ascent() - (markupBox->y() + markupBox->renderer()->style(isFirstLineStyle())->fontMetrics().ascent());
if (markupBox->nodeAtPoint(request, result, locationInContainer, LayoutPoint(mtx, mty), lineTop, lineBottom)) {
renderer()->updateHitTestResult(result, locationInContainer.point() - LayoutSize(mtx, mty));
return true;
LayoutRect boundsRect(adjustedLocation, LayoutSize(m_logicalWidth, m_height));
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