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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
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* 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/rendering/HitTestResult.h"
#include "core/rendering/InlineTextBox.h"
#include "core/rendering/PaintInfo.h"
#include "core/rendering/RenderBlockFlow.h"
#include "core/rendering/RootInlineBox.h"
#include "core/rendering/style/ShadowList.h"
#include "platform/fonts/Font.h"
#include "platform/graphics/DrawLooperBuilder.h"
#include "platform/graphics/GraphicsContextStateSaver.h"
#include "platform/text/TextRun.h"
namespace WebCore {
void EllipsisBox::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset, LayoutUnit lineTop, LayoutUnit lineBottom)
{
GraphicsContext* context = paintInfo.context;
RenderStyle* style = renderer().style(isFirstLineStyle());
const Font& font = style->font();
FloatPoint boxOrigin = locationIncludingFlipping();
boxOrigin.moveBy(FloatPoint(paintOffset));
if (!isHorizontal())
boxOrigin.move(0, -virtualLogicalHeight());
FloatRect boxRect(boxOrigin, LayoutSize(logicalWidth(), virtualLogicalHeight()));
GraphicsContextStateSaver stateSaver(*context);
if (!isHorizontal())
context->concatCTM(InlineTextBox::rotation(boxRect, InlineTextBox::Clockwise));
FloatPoint textOrigin = FloatPoint(boxOrigin.x(), boxOrigin.y() + font.fontMetrics().ascent());
Color styleTextColor = renderer().resolveColor(style, CSSPropertyWebkitTextFillColor);
if (styleTextColor != context->fillColor())
context->setFillColor(styleTextColor);
if (selectionState() != RenderObject::SelectionNone) {
paintSelection(context, boxOrigin, style, font);
// Select the correct color for painting the text.
Color foreground = paintInfo.forceBlackText() ? Color::black : renderer().selectionForegroundColor();
if (foreground != styleTextColor)
context->setFillColor(foreground);
}
// Text shadows are disabled when printing. http://crbug.com/258321
const ShadowList* shadowList = context->printing() ? 0 : style->textShadow();
bool hasShadow = shadowList;
if (hasShadow) {
OwnPtr<DrawLooperBuilder> drawLooperBuilder = DrawLooperBuilder::create();
for (size_t i = shadowList->shadows().size(); i--; ) {
const ShadowData& shadow = shadowList->shadows()[i];
float shadowX = isHorizontal() ? shadow.x() : shadow.y();
float shadowY = isHorizontal() ? shadow.y() : -shadow.x();
FloatSize offset(shadowX, shadowY);
drawLooperBuilder->addShadow(offset, shadow.blur(), shadow.color(),
DrawLooperBuilder::ShadowRespectsTransforms, DrawLooperBuilder::ShadowIgnoresAlpha);
}
drawLooperBuilder->addUnmodifiedContent();
context->setDrawLooper(drawLooperBuilder.release());
}
TextRun textRun = RenderBlockFlow::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())
context->setFillColor(styleTextColor);
if (hasShadow)
context->clearDrawLooper();
paintMarkupBox(paintInfo, paintOffset, lineTop, lineBottom, style);
}
InlineBox* EllipsisBox::markupBox() const
{
if (!m_shouldPaintMarkupBox || !renderer().isRenderBlock())
return 0;
RenderBlock& block = toRenderBlock(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)
return;
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 = renderer().style(isFirstLineStyle());
const Font& font = style->font();
return enclosingIntRect(font.selectionRectForText(RenderBlockFlow::constructTextRun(&renderer(), font, m_str, style, TextRun::AllowTrailingExpansion), IntPoint(logicalLeft(), logicalTop() + root().selectionTopAdjustedForPrecedingBlock()), root().selectionHeightAdjustedForPrecedingBlock()));
}
void EllipsisBox::paintSelection(GraphicsContext* context, const FloatPoint& boxOrigin, RenderStyle* style, const Font& font)
{
Color textColor = renderer().resolveColor(style, CSSPropertyColor);
Color c = renderer().selectionBackgroundColor();
if (!c.alpha())
return;
// If the text color ends up being the same as the selection background, invert the selection
// background.
if (textColor == c)
c = Color(0xff - c.red(), 0xff - c.green(), 0xff - c.blue());
GraphicsContextStateSaver stateSaver(*context);
LayoutUnit selectionBottom = root().selectionBottom();
LayoutUnit top = root().selectionTop();
LayoutUnit h = root().selectionHeight();
const int deltaY = roundToInt(renderer().style()->isFlippedLinesWritingMode() ? selectionBottom - logicalBottom() : logicalTop() - top);
const FloatPoint localOrigin(boxOrigin.x(), boxOrigin.y() - deltaY);
FloatRect clipRect(localOrigin, FloatSize(m_logicalWidth, h.toFloat()));
alignSelectionRectToDevicePixels(clipRect);
context->clip(clipRect);
context->drawHighlightForText(font, RenderBlockFlow::constructTextRun(&renderer(), font, m_str, style, TextRun::AllowTrailingExpansion), localOrigin, 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 = 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;
}
}
FloatPoint boxOrigin = locationIncludingFlipping();
boxOrigin.moveBy(accumulatedOffset);
FloatRect boundsRect(boxOrigin, size());
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
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