1 /*
2 * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
3 * Copyright (C) 2004, 2005, 2007, 2008 Rob Buis <buis@kde.org>
4 * Copyright (C) 2007 Eric Seidel <eric@webkit.org>
5 * Copyright (C) 2009 Google, Inc. All rights reserved.
6 * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
17 *
18 * You should have received a copy of the GNU Library General Public License
19 * along with this library; see the file COPYING.LIB. If not, write to
20 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
22 */
23
24 #include "config.h"
25
26 #include "core/rendering/svg/RenderSVGContainer.h"
27
28 #include "core/frame/Settings.h"
29 #include "core/rendering/GraphicsContextAnnotator.h"
30 #include "core/rendering/RenderView.h"
31 #include "core/rendering/svg/SVGRenderSupport.h"
32 #include "core/rendering/svg/SVGRenderingContext.h"
33 #include "core/rendering/svg/SVGResources.h"
34 #include "core/rendering/svg/SVGResourcesCache.h"
35 #include "platform/graphics/GraphicsContextCullSaver.h"
36 #include "platform/graphics/GraphicsContextStateSaver.h"
37
38 namespace blink {
39
RenderSVGContainer(SVGElement * node)40 RenderSVGContainer::RenderSVGContainer(SVGElement* node)
41 : RenderSVGModelObject(node)
42 , m_objectBoundingBoxValid(false)
43 , m_needsBoundariesUpdate(true)
44 {
45 }
46
~RenderSVGContainer()47 RenderSVGContainer::~RenderSVGContainer()
48 {
49 }
50
trace(Visitor * visitor)51 void RenderSVGContainer::trace(Visitor* visitor)
52 {
53 visitor->trace(m_children);
54 RenderSVGModelObject::trace(visitor);
55 }
56
layout()57 void RenderSVGContainer::layout()
58 {
59 ASSERT(needsLayout());
60
61 // Allow RenderSVGViewportContainer to update its viewport.
62 calcViewport();
63
64 // Allow RenderSVGTransformableContainer to update its transform.
65 bool updatedTransform = calculateLocalTransform();
66
67 // RenderSVGViewportContainer needs to set the 'layout size changed' flag.
68 determineIfLayoutSizeChanged();
69
70 SVGRenderSupport::layoutChildren(this, selfNeedsLayout() || SVGRenderSupport::filtersForceContainerLayout(this));
71
72 // Invalidate all resources of this client if our layout changed.
73 if (everHadLayout() && needsLayout())
74 SVGResourcesCache::clientLayoutChanged(this);
75
76 if (m_needsBoundariesUpdate || updatedTransform) {
77 updateCachedBoundaries();
78 m_needsBoundariesUpdate = false;
79
80 // If our bounds changed, notify the parents.
81 RenderSVGModelObject::setNeedsBoundariesUpdate();
82 }
83
84 clearNeedsLayout();
85 }
86
addChild(RenderObject * child,RenderObject * beforeChild)87 void RenderSVGContainer::addChild(RenderObject* child, RenderObject* beforeChild)
88 {
89 RenderSVGModelObject::addChild(child, beforeChild);
90 SVGResourcesCache::clientWasAddedToTree(child, child->style());
91 }
92
removeChild(RenderObject * child)93 void RenderSVGContainer::removeChild(RenderObject* child)
94 {
95 SVGResourcesCache::clientWillBeRemovedFromTree(child);
96 RenderSVGModelObject::removeChild(child);
97 }
98
99
selfWillPaint()100 bool RenderSVGContainer::selfWillPaint()
101 {
102 SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(this);
103 return resources && resources->filter();
104 }
105
paint(PaintInfo & paintInfo,const LayoutPoint &)106 void RenderSVGContainer::paint(PaintInfo& paintInfo, const LayoutPoint&)
107 {
108 ANNOTATE_GRAPHICS_CONTEXT(paintInfo, this);
109
110 // Spec: groups w/o children still may render filter content.
111 if (!firstChild() && !selfWillPaint())
112 return;
113
114 FloatRect paintInvalidationRect = paintInvalidationRectInLocalCoordinates();
115 if (!SVGRenderSupport::paintInfoIntersectsPaintInvalidationRect(paintInvalidationRect, localToParentTransform(), paintInfo))
116 return;
117
118 PaintInfo childPaintInfo(paintInfo);
119 {
120 GraphicsContextStateSaver stateSaver(*childPaintInfo.context);
121
122 // Let the RenderSVGViewportContainer subclass clip if necessary
123 applyViewportClip(childPaintInfo);
124
125 childPaintInfo.applyTransform(localToParentTransform());
126
127 SVGRenderingContext renderingContext;
128 GraphicsContextCullSaver cullSaver(*childPaintInfo.context);
129 bool continueRendering = true;
130 if (childPaintInfo.phase == PaintPhaseForeground) {
131 renderingContext.prepareToRenderSVGContent(this, childPaintInfo);
132 continueRendering = renderingContext.isRenderingPrepared();
133
134 if (continueRendering && document().settings()->containerCullingEnabled())
135 cullSaver.cull(paintInvalidationRectInLocalCoordinates());
136 }
137
138 if (continueRendering) {
139 childPaintInfo.updatePaintingRootForChildren(this);
140 for (RenderObject* child = firstChild(); child; child = child->nextSibling())
141 child->paint(childPaintInfo, IntPoint());
142 }
143 }
144
145 // FIXME: This really should be drawn from local coordinates, but currently we hack it
146 // to avoid our clip killing our outline rect. Thus we translate our
147 // outline rect into parent coords before drawing.
148 // FIXME: This means our focus ring won't share our rotation like it should.
149 // We should instead disable our clip during PaintPhaseOutline
150 if (paintInfo.phase == PaintPhaseForeground && style()->outlineWidth() && style()->visibility() == VISIBLE) {
151 IntRect paintRectInParent = enclosingIntRect(localToParentTransform().mapRect(paintInvalidationRect));
152 paintOutline(paintInfo, paintRectInParent);
153 }
154 }
155
156 // addFocusRingRects is called from paintOutline and needs to be in the same coordinates as the paintOuline call
addFocusRingRects(Vector<LayoutRect> & rects,const LayoutPoint &,const RenderLayerModelObject *) const157 void RenderSVGContainer::addFocusRingRects(Vector<LayoutRect>& rects, const LayoutPoint&, const RenderLayerModelObject*) const
158 {
159 LayoutRect paintRectInParent = LayoutRect(localToParentTransform().mapRect(paintInvalidationRectInLocalCoordinates()));
160 if (!paintRectInParent.isEmpty())
161 rects.append(paintRectInParent);
162 }
163
updateCachedBoundaries()164 void RenderSVGContainer::updateCachedBoundaries()
165 {
166 SVGRenderSupport::computeContainerBoundingBoxes(this, m_objectBoundingBox, m_objectBoundingBoxValid, m_strokeBoundingBox, m_paintInvalidationBoundingBox);
167 SVGRenderSupport::intersectPaintInvalidationRectWithResources(this, m_paintInvalidationBoundingBox);
168 }
169
nodeAtFloatPoint(const HitTestRequest & request,HitTestResult & result,const FloatPoint & pointInParent,HitTestAction hitTestAction)170 bool RenderSVGContainer::nodeAtFloatPoint(const HitTestRequest& request, HitTestResult& result, const FloatPoint& pointInParent, HitTestAction hitTestAction)
171 {
172 // Give RenderSVGViewportContainer a chance to apply its viewport clip
173 if (!pointIsInsideViewportClip(pointInParent))
174 return false;
175
176 FloatPoint localPoint;
177 if (!SVGRenderSupport::transformToUserSpaceAndCheckClipping(this, localToParentTransform(), pointInParent, localPoint))
178 return false;
179
180 for (RenderObject* child = lastChild(); child; child = child->previousSibling()) {
181 if (child->nodeAtFloatPoint(request, result, localPoint, hitTestAction)) {
182 updateHitTestResult(result, roundedLayoutPoint(localPoint));
183 return true;
184 }
185 }
186
187 // pointer-events=boundingBox makes it possible for containers to be direct targets
188 if (style()->pointerEvents() == PE_BOUNDINGBOX) {
189 ASSERT(isObjectBoundingBoxValid());
190 if (objectBoundingBox().contains(localPoint)) {
191 updateHitTestResult(result, roundedLayoutPoint(localPoint));
192 return true;
193 }
194 }
195 // 16.4: "If there are no graphics elements whose relevant graphics content is under the pointer (i.e., there is no target element), the event is not dispatched."
196 return false;
197 }
198
199 }
200