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 #if ENABLE(SVG)
27 #include "RenderSVGContainer.h"
28
29 #include "GraphicsContext.h"
30 #include "RenderSVGResource.h"
31 #include "RenderSVGResourceFilter.h"
32 #include "RenderView.h"
33 #include "SVGRenderSupport.h"
34 #include "SVGResources.h"
35 #include "SVGStyledElement.h"
36
37 namespace WebCore {
38
RenderSVGContainer(SVGStyledElement * node)39 RenderSVGContainer::RenderSVGContainer(SVGStyledElement* node)
40 : RenderSVGModelObject(node)
41 , m_needsBoundariesUpdate(true)
42 {
43 }
44
~RenderSVGContainer()45 RenderSVGContainer::~RenderSVGContainer()
46 {
47 }
48
layout()49 void RenderSVGContainer::layout()
50 {
51 ASSERT(needsLayout());
52
53 // RenderSVGRoot disables layoutState for the SVG rendering tree.
54 ASSERT(!view()->layoutStateEnabled());
55
56 // Allow RenderSVGViewportContainer to update its viewport.
57 calcViewport();
58
59 LayoutRepainter repainter(*this, checkForRepaintDuringLayout() || selfWillPaint());
60
61 // Allow RenderSVGTransformableContainer to update its transform.
62 bool updatedTransform = calculateLocalTransform();
63
64 SVGRenderSupport::layoutChildren(this, selfNeedsLayout());
65
66 // Invalidate all resources of this client if our layout changed.
67 if (m_everHadLayout && selfNeedsLayout())
68 SVGResourcesCache::clientLayoutChanged(this);
69
70 // At this point LayoutRepainter already grabbed the old bounds,
71 // recalculate them now so repaintAfterLayout() uses the new bounds.
72 if (m_needsBoundariesUpdate || updatedTransform) {
73 updateCachedBoundaries();
74 m_needsBoundariesUpdate = false;
75
76 // If our bounds changed, notify the parents.
77 RenderSVGModelObject::setNeedsBoundariesUpdate();
78 }
79
80 repainter.repaintAfterLayout();
81 setNeedsLayout(false);
82 }
83
selfWillPaint()84 bool RenderSVGContainer::selfWillPaint()
85 {
86 #if ENABLE(FILTERS)
87 SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(this);
88 return resources && resources->filter();
89 #else
90 return false;
91 #endif
92 }
93
paint(PaintInfo & paintInfo,int,int)94 void RenderSVGContainer::paint(PaintInfo& paintInfo, int, int)
95 {
96 if (paintInfo.context->paintingDisabled())
97 return;
98
99 // Spec: groups w/o children still may render filter content.
100 if (!firstChild() && !selfWillPaint())
101 return;
102
103 FloatRect repaintRect = repaintRectInLocalCoordinates();
104 if (!SVGRenderSupport::paintInfoIntersectsRepaintRect(repaintRect, localToParentTransform(), paintInfo))
105 return;
106
107 PaintInfo childPaintInfo(paintInfo);
108 {
109 GraphicsContextStateSaver stateSaver(*childPaintInfo.context);
110
111 // Let the RenderSVGViewportContainer subclass clip if necessary
112 applyViewportClip(childPaintInfo);
113
114 childPaintInfo.applyTransform(localToParentTransform());
115
116 bool continueRendering = true;
117 if (childPaintInfo.phase == PaintPhaseForeground)
118 continueRendering = SVGRenderSupport::prepareToRenderSVGContent(this, childPaintInfo);
119
120 if (continueRendering) {
121 childPaintInfo.updatePaintingRootForChildren(this);
122 for (RenderObject* child = firstChild(); child; child = child->nextSibling())
123 child->paint(childPaintInfo, 0, 0);
124 }
125
126 if (paintInfo.phase == PaintPhaseForeground)
127 SVGRenderSupport::finishRenderSVGContent(this, childPaintInfo, paintInfo.context);
128 }
129
130 // FIXME: This really should be drawn from local coordinates, but currently we hack it
131 // to avoid our clip killing our outline rect. Thus we translate our
132 // outline rect into parent coords before drawing.
133 // FIXME: This means our focus ring won't share our rotation like it should.
134 // We should instead disable our clip during PaintPhaseOutline
135 if ((paintInfo.phase == PaintPhaseOutline || paintInfo.phase == PaintPhaseSelfOutline) && style()->outlineWidth() && style()->visibility() == VISIBLE) {
136 IntRect paintRectInParent = enclosingIntRect(localToParentTransform().mapRect(repaintRect));
137 paintOutline(paintInfo.context, paintRectInParent.x(), paintRectInParent.y(), paintRectInParent.width(), paintRectInParent.height());
138 }
139 }
140
141 // addFocusRingRects is called from paintOutline and needs to be in the same coordinates as the paintOuline call
addFocusRingRects(Vector<IntRect> & rects,int,int)142 void RenderSVGContainer::addFocusRingRects(Vector<IntRect>& rects, int, int)
143 {
144 IntRect paintRectInParent = enclosingIntRect(localToParentTransform().mapRect(repaintRectInLocalCoordinates()));
145 if (!paintRectInParent.isEmpty())
146 rects.append(paintRectInParent);
147 }
148
updateCachedBoundaries()149 void RenderSVGContainer::updateCachedBoundaries()
150 {
151 m_objectBoundingBox = FloatRect();
152 m_strokeBoundingBox = FloatRect();
153 m_repaintBoundingBox = FloatRect();
154
155 SVGRenderSupport::computeContainerBoundingBoxes(this, m_objectBoundingBox, m_strokeBoundingBox, m_repaintBoundingBox);
156 SVGRenderSupport::intersectRepaintRectWithResources(this, m_repaintBoundingBox);
157 }
158
nodeAtFloatPoint(const HitTestRequest & request,HitTestResult & result,const FloatPoint & pointInParent,HitTestAction hitTestAction)159 bool RenderSVGContainer::nodeAtFloatPoint(const HitTestRequest& request, HitTestResult& result, const FloatPoint& pointInParent, HitTestAction hitTestAction)
160 {
161 // Give RenderSVGViewportContainer a chance to apply its viewport clip
162 if (!pointIsInsideViewportClip(pointInParent))
163 return false;
164
165 FloatPoint localPoint = localToParentTransform().inverse().mapPoint(pointInParent);
166
167 if (!SVGRenderSupport::pointInClippingArea(this, localPoint))
168 return false;
169
170 for (RenderObject* child = lastChild(); child; child = child->previousSibling()) {
171 if (child->nodeAtFloatPoint(request, result, localPoint, hitTestAction)) {
172 updateHitTestResult(result, roundedIntPoint(localPoint));
173 return true;
174 }
175 }
176
177 // Spec: Only graphical elements can be targeted by the mouse, period.
178 // 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."
179 return false;
180 }
181
182 }
183
184 #endif // ENABLE(SVG)
185