1 /**
2 * Copyright (C) 2003, 2006 Apple Computer, Inc.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB. If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 */
19
20 #include "config.h"
21 #include "core/rendering/EllipsisBox.h"
22
23 #include "core/rendering/HitTestResult.h"
24 #include "core/rendering/InlineTextBox.h"
25 #include "core/rendering/PaintInfo.h"
26 #include "core/rendering/RenderBlockFlow.h"
27 #include "core/rendering/RootInlineBox.h"
28 #include "core/rendering/style/ShadowList.h"
29 #include "platform/fonts/Font.h"
30 #include "platform/graphics/DrawLooperBuilder.h"
31 #include "platform/graphics/GraphicsContextStateSaver.h"
32 #include "platform/text/TextRun.h"
33
34 namespace WebCore {
35
paint(PaintInfo & paintInfo,const LayoutPoint & paintOffset,LayoutUnit lineTop,LayoutUnit lineBottom)36 void EllipsisBox::paint(PaintInfo& paintInfo, const LayoutPoint& paintOffset, LayoutUnit lineTop, LayoutUnit lineBottom)
37 {
38 GraphicsContext* context = paintInfo.context;
39 RenderStyle* style = renderer().style(isFirstLineStyle());
40
41 const Font& font = style->font();
42 FloatPoint boxOrigin = locationIncludingFlipping();
43 boxOrigin.moveBy(FloatPoint(paintOffset));
44 if (!isHorizontal())
45 boxOrigin.move(0, -virtualLogicalHeight());
46 FloatRect boxRect(boxOrigin, LayoutSize(logicalWidth(), virtualLogicalHeight()));
47 GraphicsContextStateSaver stateSaver(*context);
48 if (!isHorizontal())
49 context->concatCTM(InlineTextBox::rotation(boxRect, InlineTextBox::Clockwise));
50 FloatPoint textOrigin = FloatPoint(boxOrigin.x(), boxOrigin.y() + font.fontMetrics().ascent());
51
52 Color styleTextColor = renderer().resolveColor(style, CSSPropertyWebkitTextFillColor);
53 if (styleTextColor != context->fillColor())
54 context->setFillColor(styleTextColor);
55
56 if (selectionState() != RenderObject::SelectionNone) {
57 paintSelection(context, boxOrigin, style, font);
58
59 // Select the correct color for painting the text.
60 Color foreground = paintInfo.forceBlackText() ? Color::black : renderer().selectionForegroundColor();
61 if (foreground != styleTextColor)
62 context->setFillColor(foreground);
63 }
64
65 // Text shadows are disabled when printing. http://crbug.com/258321
66 const ShadowList* shadowList = context->printing() ? 0 : style->textShadow();
67 bool hasShadow = shadowList;
68 if (hasShadow) {
69 OwnPtr<DrawLooperBuilder> drawLooperBuilder = DrawLooperBuilder::create();
70 for (size_t i = shadowList->shadows().size(); i--; ) {
71 const ShadowData& shadow = shadowList->shadows()[i];
72 float shadowX = isHorizontal() ? shadow.x() : shadow.y();
73 float shadowY = isHorizontal() ? shadow.y() : -shadow.x();
74 FloatSize offset(shadowX, shadowY);
75 drawLooperBuilder->addShadow(offset, shadow.blur(), shadow.color(),
76 DrawLooperBuilder::ShadowRespectsTransforms, DrawLooperBuilder::ShadowIgnoresAlpha);
77 }
78 drawLooperBuilder->addUnmodifiedContent();
79 context->setDrawLooper(drawLooperBuilder.release());
80 }
81
82 TextRun textRun = RenderBlockFlow::constructTextRun(&renderer(), font, m_str, style, TextRun::AllowTrailingExpansion);
83 TextRunPaintInfo textRunPaintInfo(textRun);
84 textRunPaintInfo.bounds = boxRect;
85 context->drawText(font, textRunPaintInfo, textOrigin);
86
87 // Restore the regular fill color.
88 if (styleTextColor != context->fillColor())
89 context->setFillColor(styleTextColor);
90
91 if (hasShadow)
92 context->clearDrawLooper();
93
94 paintMarkupBox(paintInfo, paintOffset, lineTop, lineBottom, style);
95 }
96
markupBox() const97 InlineBox* EllipsisBox::markupBox() const
98 {
99 if (!m_shouldPaintMarkupBox || !renderer().isRenderBlock())
100 return 0;
101
102 RenderBlock& block = toRenderBlock(renderer());
103 RootInlineBox* lastLine = block.lineAtIndex(block.lineCount() - 1);
104 if (!lastLine)
105 return 0;
106
107 // If the last line-box on the last line of a block is a link, -webkit-line-clamp paints that box after the ellipsis.
108 // It does not actually move the link.
109 InlineBox* anchorBox = lastLine->lastChild();
110 if (!anchorBox || !anchorBox->renderer().style()->isLink())
111 return 0;
112
113 return anchorBox;
114 }
115
paintMarkupBox(PaintInfo & paintInfo,const LayoutPoint & paintOffset,LayoutUnit lineTop,LayoutUnit lineBottom,RenderStyle * style)116 void EllipsisBox::paintMarkupBox(PaintInfo& paintInfo, const LayoutPoint& paintOffset, LayoutUnit lineTop, LayoutUnit lineBottom, RenderStyle* style)
117 {
118 InlineBox* markupBox = this->markupBox();
119 if (!markupBox)
120 return;
121
122 LayoutPoint adjustedPaintOffset = paintOffset;
123 adjustedPaintOffset.move(x() + m_logicalWidth - markupBox->x(),
124 y() + style->fontMetrics().ascent() - (markupBox->y() + markupBox->renderer().style(isFirstLineStyle())->fontMetrics().ascent()));
125 markupBox->paint(paintInfo, adjustedPaintOffset, lineTop, lineBottom);
126 }
127
selectionRect()128 IntRect EllipsisBox::selectionRect()
129 {
130 RenderStyle* style = renderer().style(isFirstLineStyle());
131 const Font& font = style->font();
132 return enclosingIntRect(font.selectionRectForText(RenderBlockFlow::constructTextRun(&renderer(), font, m_str, style, TextRun::AllowTrailingExpansion), IntPoint(logicalLeft(), logicalTop() + root().selectionTopAdjustedForPrecedingBlock()), root().selectionHeightAdjustedForPrecedingBlock()));
133 }
134
paintSelection(GraphicsContext * context,const FloatPoint & boxOrigin,RenderStyle * style,const Font & font)135 void EllipsisBox::paintSelection(GraphicsContext* context, const FloatPoint& boxOrigin, RenderStyle* style, const Font& font)
136 {
137 Color textColor = renderer().resolveColor(style, CSSPropertyColor);
138 Color c = renderer().selectionBackgroundColor();
139 if (!c.alpha())
140 return;
141
142 // If the text color ends up being the same as the selection background, invert the selection
143 // background.
144 if (textColor == c)
145 c = Color(0xff - c.red(), 0xff - c.green(), 0xff - c.blue());
146
147 GraphicsContextStateSaver stateSaver(*context);
148 LayoutUnit selectionBottom = root().selectionBottom();
149 LayoutUnit top = root().selectionTop();
150 LayoutUnit h = root().selectionHeight();
151 const int deltaY = roundToInt(renderer().style()->isFlippedLinesWritingMode() ? selectionBottom - logicalBottom() : logicalTop() - top);
152 const FloatPoint localOrigin(boxOrigin.x(), boxOrigin.y() - deltaY);
153 FloatRect clipRect(localOrigin, FloatSize(m_logicalWidth, h.toFloat()));
154 alignSelectionRectToDevicePixels(clipRect);
155 context->clip(clipRect);
156 context->drawHighlightForText(font, RenderBlockFlow::constructTextRun(&renderer(), font, m_str, style, TextRun::AllowTrailingExpansion), localOrigin, h, c);
157 }
158
nodeAtPoint(const HitTestRequest & request,HitTestResult & result,const HitTestLocation & locationInContainer,const LayoutPoint & accumulatedOffset,LayoutUnit lineTop,LayoutUnit lineBottom)159 bool EllipsisBox::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, LayoutUnit lineTop, LayoutUnit lineBottom)
160 {
161 LayoutPoint adjustedLocation = accumulatedOffset + roundedLayoutPoint(topLeft());
162
163 // Hit test the markup box.
164 if (InlineBox* markupBox = this->markupBox()) {
165 RenderStyle* style = renderer().style(isFirstLineStyle());
166 LayoutUnit mtx = adjustedLocation.x() + m_logicalWidth - markupBox->x();
167 LayoutUnit mty = adjustedLocation.y() + style->fontMetrics().ascent() - (markupBox->y() + markupBox->renderer().style(isFirstLineStyle())->fontMetrics().ascent());
168 if (markupBox->nodeAtPoint(request, result, locationInContainer, LayoutPoint(mtx, mty), lineTop, lineBottom)) {
169 renderer().updateHitTestResult(result, locationInContainer.point() - LayoutSize(mtx, mty));
170 return true;
171 }
172 }
173
174 FloatPoint boxOrigin = locationIncludingFlipping();
175 boxOrigin.moveBy(accumulatedOffset);
176 FloatRect boundsRect(boxOrigin, size());
177 if (visibleToHitTestRequest(request) && boundsRect.intersects(HitTestLocation::rectForPoint(locationInContainer.point(), 0, 0, 0, 0))) {
178 renderer().updateHitTestResult(result, locationInContainer.point() - toLayoutSize(adjustedLocation));
179 if (!result.addNodeToRectBasedTestResult(renderer().node(), request, locationInContainer, boundsRect))
180 return true;
181 }
182
183 return false;
184 }
185
186 } // namespace WebCore
187