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/LayoutRepainter.h"
31 #include "core/rendering/RenderView.h"
32 #include "core/rendering/svg/SVGRenderSupport.h"
33 #include "core/rendering/svg/SVGRenderingContext.h"
34 #include "core/rendering/svg/SVGResources.h"
35 #include "core/rendering/svg/SVGResourcesCache.h"
36 #include "platform/graphics/GraphicsContextCullSaver.h"
37 #include "platform/graphics/GraphicsContextStateSaver.h"
38
39 namespace WebCore {
40
RenderSVGContainer(SVGElement * node)41 RenderSVGContainer::RenderSVGContainer(SVGElement* node)
42 : RenderSVGModelObject(node)
43 , m_objectBoundingBoxValid(false)
44 , m_needsBoundariesUpdate(true)
45 {
46 }
47
~RenderSVGContainer()48 RenderSVGContainer::~RenderSVGContainer()
49 {
50 }
51
layout()52 void RenderSVGContainer::layout()
53 {
54 ASSERT(needsLayout());
55
56 // RenderSVGRoot disables layoutState for the SVG rendering tree.
57 ASSERT(!view()->layoutStateCachedOffsetsEnabled());
58
59 LayoutRepainter repainter(*this, SVGRenderSupport::checkForSVGRepaintDuringLayout(this) || selfWillPaint());
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 // At this point LayoutRepainter already grabbed the old bounds,
77 // recalculate them now so repaintAfterLayout() uses the new bounds.
78 if (m_needsBoundariesUpdate || updatedTransform) {
79 updateCachedBoundaries();
80 m_needsBoundariesUpdate = false;
81
82 // If our bounds changed, notify the parents.
83 RenderSVGModelObject::setNeedsBoundariesUpdate();
84 }
85
86 repainter.repaintAfterLayout();
87 clearNeedsLayout();
88 }
89
addChild(RenderObject * child,RenderObject * beforeChild)90 void RenderSVGContainer::addChild(RenderObject* child, RenderObject* beforeChild)
91 {
92 RenderSVGModelObject::addChild(child, beforeChild);
93 SVGResourcesCache::clientWasAddedToTree(child, child->style());
94 }
95
removeChild(RenderObject * child)96 void RenderSVGContainer::removeChild(RenderObject* child)
97 {
98 SVGResourcesCache::clientWillBeRemovedFromTree(child);
99 RenderSVGModelObject::removeChild(child);
100 }
101
102
selfWillPaint()103 bool RenderSVGContainer::selfWillPaint()
104 {
105 SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(this);
106 return resources && resources->filter();
107 }
108
paint(PaintInfo & paintInfo,const LayoutPoint &)109 void RenderSVGContainer::paint(PaintInfo& paintInfo, const LayoutPoint&)
110 {
111 ANNOTATE_GRAPHICS_CONTEXT(paintInfo, this);
112
113 if (paintInfo.context->paintingDisabled())
114 return;
115
116 // Spec: groups w/o children still may render filter content.
117 if (!firstChild() && !selfWillPaint())
118 return;
119
120 FloatRect repaintRect = paintInvalidationRectInLocalCoordinates();
121 if (!SVGRenderSupport::paintInfoIntersectsRepaintRect(repaintRect, localToParentTransform(), paintInfo))
122 return;
123
124 PaintInfo childPaintInfo(paintInfo);
125 {
126 GraphicsContextStateSaver stateSaver(*childPaintInfo.context);
127
128 // Let the RenderSVGViewportContainer subclass clip if necessary
129 applyViewportClip(childPaintInfo);
130
131 childPaintInfo.applyTransform(localToParentTransform());
132
133 SVGRenderingContext renderingContext;
134 GraphicsContextCullSaver cullSaver(*childPaintInfo.context);
135 bool continueRendering = true;
136 if (childPaintInfo.phase == PaintPhaseForeground) {
137 renderingContext.prepareToRenderSVGContent(this, childPaintInfo);
138 continueRendering = renderingContext.isRenderingPrepared();
139
140 if (continueRendering && document().settings()->containerCullingEnabled())
141 cullSaver.cull(paintInvalidationRectInLocalCoordinates());
142 }
143
144 if (continueRendering) {
145 childPaintInfo.updatePaintingRootForChildren(this);
146 for (RenderObject* child = firstChild(); child; child = child->nextSibling())
147 child->paint(childPaintInfo, IntPoint());
148 }
149 }
150
151 // FIXME: This really should be drawn from local coordinates, but currently we hack it
152 // to avoid our clip killing our outline rect. Thus we translate our
153 // outline rect into parent coords before drawing.
154 // FIXME: This means our focus ring won't share our rotation like it should.
155 // We should instead disable our clip during PaintPhaseOutline
156 if (paintInfo.phase == PaintPhaseForeground && style()->outlineWidth() && style()->visibility() == VISIBLE) {
157 IntRect paintRectInParent = enclosingIntRect(localToParentTransform().mapRect(repaintRect));
158 paintOutline(paintInfo, paintRectInParent);
159 }
160 }
161
162 // addFocusRingRects is called from paintOutline and needs to be in the same coordinates as the paintOuline call
addFocusRingRects(Vector<IntRect> & rects,const LayoutPoint &,const RenderLayerModelObject *)163 void RenderSVGContainer::addFocusRingRects(Vector<IntRect>& rects, const LayoutPoint&, const RenderLayerModelObject*)
164 {
165 IntRect paintRectInParent = enclosingIntRect(localToParentTransform().mapRect(paintInvalidationRectInLocalCoordinates()));
166 if (!paintRectInParent.isEmpty())
167 rects.append(paintRectInParent);
168 }
169
updateCachedBoundaries()170 void RenderSVGContainer::updateCachedBoundaries()
171 {
172 SVGRenderSupport::computeContainerBoundingBoxes(this, m_objectBoundingBox, m_objectBoundingBoxValid, m_strokeBoundingBox, m_repaintBoundingBox);
173 SVGRenderSupport::intersectRepaintRectWithResources(this, m_repaintBoundingBox);
174 }
175
nodeAtFloatPoint(const HitTestRequest & request,HitTestResult & result,const FloatPoint & pointInParent,HitTestAction hitTestAction)176 bool RenderSVGContainer::nodeAtFloatPoint(const HitTestRequest& request, HitTestResult& result, const FloatPoint& pointInParent, HitTestAction hitTestAction)
177 {
178 // Give RenderSVGViewportContainer a chance to apply its viewport clip
179 if (!pointIsInsideViewportClip(pointInParent))
180 return false;
181
182 FloatPoint localPoint = localToParentTransform().inverse().mapPoint(pointInParent);
183
184 if (!SVGRenderSupport::pointInClippingArea(this, localPoint))
185 return false;
186
187 for (RenderObject* child = lastChild(); child; child = child->previousSibling()) {
188 if (child->nodeAtFloatPoint(request, result, localPoint, hitTestAction)) {
189 updateHitTestResult(result, roundedLayoutPoint(localPoint));
190 return true;
191 }
192 }
193
194 // pointer-events=boundingBox makes it possible for containers to be direct targets
195 if (style()->pointerEvents() == PE_BOUNDINGBOX) {
196 ASSERT(isObjectBoundingBoxValid());
197 if (objectBoundingBox().contains(localPoint)) {
198 updateHitTestResult(result, roundedLayoutPoint(localPoint));
199 return true;
200 }
201 }
202 // 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."
203 return false;
204 }
205
206 }
207