1 /*
2 * This file is part of the WebKit project.
3 *
4 * Copyright (C) 2006 Apple Computer, Inc.
5 * 2006 Alexander Kellett <lypanov@kde.org>
6 * 2006 Oliver Hunt <ojh16@student.canterbury.ac.nz>
7 * 2007 Nikolas Zimmermann <zimmermann@kde.org>
8 * 2008 Rob Buis <buis@kde.org>
9 *
10 * This library is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU Library General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
14 *
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * Library General Public License for more details.
19 *
20 * You should have received a copy of the GNU Library General Public License
21 * along with this library; see the file COPYING.LIB. If not, write to
22 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
23 * Boston, MA 02110-1301, USA.
24 *
25 */
26
27 #include "config.h"
28
29 #if ENABLE(SVG)
30 #include "RenderSVGText.h"
31
32 #include "FloatConversion.h"
33 #include "FloatQuad.h"
34 #include "GraphicsContext.h"
35 #include "PointerEventsHitRules.h"
36 #include "RenderLayer.h"
37 #include "RenderSVGRoot.h"
38 #include "SVGLengthList.h"
39 #include "SVGRenderSupport.h"
40 #include "SVGResourceFilter.h"
41 #include "SVGRootInlineBox.h"
42 #include "SVGTextElement.h"
43 #include "SVGTransformList.h"
44 #include "SVGURIReference.h"
45 #include "SimpleFontData.h"
46
47 namespace WebCore {
48
RenderSVGText(SVGTextElement * node)49 RenderSVGText::RenderSVGText(SVGTextElement* node)
50 : RenderSVGBlock(node)
51 {
52 }
53
clippedOverflowRectForRepaint(RenderBoxModelObject * repaintContainer)54 IntRect RenderSVGText::clippedOverflowRectForRepaint(RenderBoxModelObject* repaintContainer)
55 {
56 return SVGRenderBase::clippedOverflowRectForRepaint(this, repaintContainer);
57 }
58
computeRectForRepaint(RenderBoxModelObject * repaintContainer,IntRect & repaintRect,bool fixed)59 void RenderSVGText::computeRectForRepaint(RenderBoxModelObject* repaintContainer, IntRect& repaintRect, bool fixed)
60 {
61 SVGRenderBase::computeRectForRepaint(this, repaintContainer, repaintRect, fixed);
62 }
63
mapLocalToContainer(RenderBoxModelObject * repaintContainer,bool fixed,bool useTransforms,TransformState & transformState) const64 void RenderSVGText::mapLocalToContainer(RenderBoxModelObject* repaintContainer, bool fixed , bool useTransforms, TransformState& transformState) const
65 {
66 SVGRenderBase::mapLocalToContainer(this, repaintContainer, fixed, useTransforms, transformState);
67 }
68
layout()69 void RenderSVGText::layout()
70 {
71 ASSERT(needsLayout());
72
73 // FIXME: This is a hack to avoid the RenderBlock::layout() partial repainting code which is not (yet) SVG aware
74 setNeedsLayout(true);
75
76 LayoutRepainter repainter(*this, checkForRepaintDuringLayout());
77
78 // Best guess for a relative starting point
79 SVGTextElement* text = static_cast<SVGTextElement*>(node());
80 int xOffset = (int)(text->x()->getFirst().value(text));
81 int yOffset = (int)(text->y()->getFirst().value(text));
82 setLocation(xOffset, yOffset);
83
84 m_localTransform = text->animatedLocalTransform();
85
86 RenderBlock::layout();
87
88 repainter.repaintAfterLayout();
89 setNeedsLayout(false);
90 }
91
createRootInlineBox()92 RootInlineBox* RenderSVGText::createRootInlineBox()
93 {
94 RootInlineBox* box = new (renderArena()) SVGRootInlineBox(this);
95 box->setHasVirtualHeight();
96 return box;
97 }
98
nodeAtFloatPoint(const HitTestRequest & request,HitTestResult & result,const FloatPoint & pointInParent,HitTestAction hitTestAction)99 bool RenderSVGText::nodeAtFloatPoint(const HitTestRequest& request, HitTestResult& result, const FloatPoint& pointInParent, HitTestAction hitTestAction)
100 {
101 PointerEventsHitRules hitRules(PointerEventsHitRules::SVG_TEXT_HITTESTING, style()->pointerEvents());
102 bool isVisible = (style()->visibility() == VISIBLE);
103 if (isVisible || !hitRules.requireVisible) {
104 if ((hitRules.canHitStroke && (style()->svgStyle()->hasStroke() || !hitRules.requireStroke))
105 || (hitRules.canHitFill && (style()->svgStyle()->hasFill() || !hitRules.requireFill))) {
106 FloatPoint localPoint = localToParentTransform().inverse().mapPoint(pointInParent);
107 return RenderBlock::nodeAtPoint(request, result, (int)localPoint.x(), (int)localPoint.y(), 0, 0, hitTestAction);
108 }
109 }
110
111 return false;
112 }
113
nodeAtPoint(const HitTestRequest &,HitTestResult &,int,int,int,int,HitTestAction)114 bool RenderSVGText::nodeAtPoint(const HitTestRequest&, HitTestResult&, int, int, int, int, HitTestAction)
115 {
116 ASSERT_NOT_REACHED();
117 return false;
118 }
119
absoluteRects(Vector<IntRect> & rects,int,int)120 void RenderSVGText::absoluteRects(Vector<IntRect>& rects, int, int)
121 {
122 RenderSVGRoot* root = findSVGRootObject(parent());
123 if (!root)
124 return;
125
126 // Don't use objectBoundingBox here, as it's unites the selection rects. Makes it hard
127 // to spot errors, if there are any using WebInspector. Individually feed them into 'rects'.
128 for (InlineRunBox* runBox = firstLineBox(); runBox; runBox = runBox->nextLineBox()) {
129 ASSERT(runBox->isInlineFlowBox());
130
131 InlineFlowBox* flowBox = static_cast<InlineFlowBox*>(runBox);
132 for (InlineBox* box = flowBox->firstChild(); box; box = box->nextOnLine()) {
133 FloatRect boxRect(box->x(), box->y(), box->width(), box->height());
134 // FIXME: crawling up the parent chain to map each rect is very inefficient
135 // we should compute the absoluteTransform outside this loop first.
136 rects.append(enclosingIntRect(localToAbsoluteQuad(boxRect).boundingBox()));
137 }
138 }
139 }
140
absoluteQuads(Vector<FloatQuad> & quads)141 void RenderSVGText::absoluteQuads(Vector<FloatQuad>& quads)
142 {
143 RenderSVGRoot* root = findSVGRootObject(parent());
144 if (!root)
145 return;
146
147 // Don't use objectBoundingBox here, as it's unites the selection rects. Makes it hard
148 // to spot errors, if there are any using WebInspector. Individually feed them into 'rects'.
149 for (InlineRunBox* runBox = firstLineBox(); runBox; runBox = runBox->nextLineBox()) {
150 ASSERT(runBox->isInlineFlowBox());
151
152 InlineFlowBox* flowBox = static_cast<InlineFlowBox*>(runBox);
153 for (InlineBox* box = flowBox->firstChild(); box; box = box->nextOnLine()) {
154 FloatRect boxRect(box->x(), box->y(), box->width(), box->height());
155 // FIXME: crawling up the parent chain to map each quad is very inefficient
156 // we should compute the absoluteTransform outside this loop first.
157 quads.append(localToAbsoluteQuad(boxRect));
158 }
159 }
160 }
161
paint(PaintInfo & paintInfo,int,int)162 void RenderSVGText::paint(PaintInfo& paintInfo, int, int)
163 {
164 PaintInfo pi(paintInfo);
165 pi.context->save();
166 applyTransformToPaintInfo(pi, localToParentTransform());
167 RenderBlock::paint(pi, 0, 0);
168 pi.context->restore();
169 }
170
objectBoundingBox() const171 FloatRect RenderSVGText::objectBoundingBox() const
172 {
173 FloatRect boundingBox;
174
175 for (InlineRunBox* runBox = firstLineBox(); runBox; runBox = runBox->nextLineBox()) {
176 ASSERT(runBox->isInlineFlowBox());
177
178 InlineFlowBox* flowBox = static_cast<InlineFlowBox*>(runBox);
179 for (InlineBox* box = flowBox->firstChild(); box; box = box->nextOnLine())
180 boundingBox.unite(FloatRect(box->x(), box->y(), box->width(), box->height()));
181 }
182
183 boundingBox.move(x(), y());
184 return boundingBox;
185 }
186
repaintRectInLocalCoordinates() const187 FloatRect RenderSVGText::repaintRectInLocalCoordinates() const
188 {
189 FloatRect repaintRect = objectBoundingBox();
190
191 // SVG needs to include the strokeWidth(), not the textStrokeWidth().
192 if (style()->svgStyle()->hasStroke()) {
193 float strokeWidth = SVGRenderStyle::cssPrimitiveToLength(this, style()->svgStyle()->strokeWidth(), 0.0f);
194
195 #if ENABLE(SVG_FONTS)
196 const Font& font = style()->font();
197 if (font.primaryFont()->isSVGFont()) {
198 float scale = font.unitsPerEm() > 0 ? font.size() / font.unitsPerEm() : 0.0f;
199
200 if (scale != 0.0f)
201 strokeWidth /= scale;
202 }
203 #endif
204
205 repaintRect.inflate(strokeWidth);
206 }
207
208 repaintRect.unite(filterBoundingBoxForRenderer(this));
209
210 return repaintRect;
211 }
212
213 }
214
215 #endif // ENABLE(SVG)
216
217 // vim:ts=4:noet
218