1 /*
2 * Copyright (C) 2006 Apple Computer, Inc.
3 * Copyright (C) 2009 Google, Inc.
4 * Copyright (C) Research In Motion Limited 2010. All rights reserved.
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
15 *
16 * You should have received a copy of the GNU Library General Public License
17 * along with this library; see the file COPYING.LIB. If not, write to
18 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
20 */
21
22 #include "config.h"
23
24 #if ENABLE(SVG) && ENABLE(SVG_FOREIGN_OBJECT)
25 #include "RenderSVGForeignObject.h"
26
27 #include "GraphicsContext.h"
28 #include "RenderSVGResource.h"
29 #include "RenderView.h"
30 #include "SVGForeignObjectElement.h"
31 #include "SVGRenderSupport.h"
32 #include "SVGSVGElement.h"
33 #include "TransformState.h"
34
35 namespace WebCore {
36
RenderSVGForeignObject(SVGForeignObjectElement * node)37 RenderSVGForeignObject::RenderSVGForeignObject(SVGForeignObjectElement* node)
38 : RenderSVGBlock(node)
39 , m_needsTransformUpdate(true)
40 {
41 }
42
~RenderSVGForeignObject()43 RenderSVGForeignObject::~RenderSVGForeignObject()
44 {
45 }
46
paint(PaintInfo & paintInfo,int,int)47 void RenderSVGForeignObject::paint(PaintInfo& paintInfo, int, int)
48 {
49 if (paintInfo.context->paintingDisabled())
50 return;
51
52 PaintInfo childPaintInfo(paintInfo);
53 childPaintInfo.context->save();
54 childPaintInfo.applyTransform(localTransform());
55
56 if (SVGRenderSupport::isOverflowHidden(this))
57 childPaintInfo.context->clip(m_viewport);
58
59 float opacity = style()->opacity();
60 if (opacity < 1.0f)
61 childPaintInfo.context->beginTransparencyLayer(opacity);
62
63 RenderBlock::paint(childPaintInfo, 0, 0);
64
65 if (opacity < 1.0f)
66 childPaintInfo.context->endTransparencyLayer();
67
68 childPaintInfo.context->restore();
69 }
70
clippedOverflowRectForRepaint(RenderBoxModelObject * repaintContainer)71 IntRect RenderSVGForeignObject::clippedOverflowRectForRepaint(RenderBoxModelObject* repaintContainer)
72 {
73 return SVGRenderSupport::clippedOverflowRectForRepaint(this, repaintContainer);
74 }
75
computeRectForRepaint(RenderBoxModelObject * repaintContainer,IntRect & repaintRect,bool fixed)76 void RenderSVGForeignObject::computeRectForRepaint(RenderBoxModelObject* repaintContainer, IntRect& repaintRect, bool fixed)
77 {
78 SVGRenderSupport::computeRectForRepaint(this, repaintContainer, repaintRect, fixed);
79 }
80
localToParentTransform() const81 const AffineTransform& RenderSVGForeignObject::localToParentTransform() const
82 {
83 m_localToParentTransform = localTransform();
84 m_localToParentTransform.translate(m_viewport.x(), m_viewport.y());
85 return m_localToParentTransform;
86 }
87
computeLogicalWidth()88 void RenderSVGForeignObject::computeLogicalWidth()
89 {
90 // FIXME: Investigate in size rounding issues
91 setWidth(static_cast<int>(roundf(m_viewport.width())));
92 }
93
computeLogicalHeight()94 void RenderSVGForeignObject::computeLogicalHeight()
95 {
96 // FIXME: Investigate in size rounding issues
97 setHeight(static_cast<int>(roundf(m_viewport.height())));
98 }
99
layout()100 void RenderSVGForeignObject::layout()
101 {
102 ASSERT(needsLayout());
103 ASSERT(!view()->layoutStateEnabled()); // RenderSVGRoot disables layoutState for the SVG rendering tree.
104
105 LayoutRepainter repainter(*this, checkForRepaintDuringLayout());
106 SVGForeignObjectElement* foreign = static_cast<SVGForeignObjectElement*>(node());
107
108 bool updateCachedBoundariesInParents = false;
109 if (m_needsTransformUpdate) {
110 m_localTransform = foreign->animatedLocalTransform();
111 m_needsTransformUpdate = false;
112 updateCachedBoundariesInParents = true;
113 }
114
115 FloatRect oldViewport = m_viewport;
116
117 // Cache viewport boundaries
118 FloatPoint viewportLocation(foreign->x().value(foreign), foreign->y().value(foreign));
119 m_viewport = FloatRect(viewportLocation, FloatSize(foreign->width().value(foreign), foreign->height().value(foreign)));
120 if (!updateCachedBoundariesInParents)
121 updateCachedBoundariesInParents = oldViewport != m_viewport;
122
123 // Set box origin to the foreignObject x/y translation, so positioned objects in XHTML content get correct
124 // positions. A regular RenderBoxModelObject would pull this information from RenderStyle - in SVG those
125 // properties are ignored for non <svg> elements, so we mimic what happens when specifying them through CSS.
126
127 // FIXME: Investigate in location rounding issues - only affects RenderSVGForeignObject & RenderSVGText
128 setLocation(roundedIntPoint(viewportLocation));
129
130 bool layoutChanged = m_everHadLayout && selfNeedsLayout();
131 RenderBlock::layout();
132 ASSERT(!needsLayout());
133
134 // If our bounds changed, notify the parents.
135 if (updateCachedBoundariesInParents)
136 RenderSVGBlock::setNeedsBoundariesUpdate();
137
138 // Invalidate all resources of this client if our layout changed.
139 if (layoutChanged)
140 SVGResourcesCache::clientLayoutChanged(this);
141
142 repainter.repaintAfterLayout();
143 }
144
nodeAtFloatPoint(const HitTestRequest & request,HitTestResult & result,const FloatPoint & pointInParent,HitTestAction hitTestAction)145 bool RenderSVGForeignObject::nodeAtFloatPoint(const HitTestRequest& request, HitTestResult& result, const FloatPoint& pointInParent, HitTestAction hitTestAction)
146 {
147 FloatPoint localPoint = localTransform().inverse().mapPoint(pointInParent);
148
149 // Early exit if local point is not contained in clipped viewport area
150 if (SVGRenderSupport::isOverflowHidden(this) && !m_viewport.contains(localPoint))
151 return false;
152
153 IntPoint roundedLocalPoint = roundedIntPoint(localPoint);
154 return RenderBlock::nodeAtPoint(request, result, roundedLocalPoint.x(), roundedLocalPoint.y(), 0, 0, hitTestAction);
155 }
156
nodeAtPoint(const HitTestRequest &,HitTestResult &,int,int,int,int,HitTestAction)157 bool RenderSVGForeignObject::nodeAtPoint(const HitTestRequest&, HitTestResult&, int, int, int, int, HitTestAction)
158 {
159 ASSERT_NOT_REACHED();
160 return false;
161 }
162
mapLocalToContainer(RenderBoxModelObject * repaintContainer,bool fixed,bool useTransforms,TransformState & transformState) const163 void RenderSVGForeignObject::mapLocalToContainer(RenderBoxModelObject* repaintContainer, bool fixed, bool useTransforms, TransformState& transformState) const
164 {
165 // When crawling up the hierachy starting from foreignObject child content, useTransforms may not be set to true.
166 if (!useTransforms)
167 useTransforms = true;
168 SVGRenderSupport::mapLocalToContainer(this, repaintContainer, fixed, useTransforms, transformState);
169 }
170
171 }
172
173 #endif
174