1 /*
2 Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
3 2004, 2005, 2007, 2008 Rob Buis <buis@kde.org>
4 2007 Eric Seidel <eric@webkit.org>
5 Copyright (C) 2009 Google, Inc. All rights reserved.
6
7 This library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Library General Public
9 License as published by the Free Software Foundation; either
10 version 2 of the License, or (at your option) any later version.
11
12 This library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Library General Public License for more details.
16
17 You should have received a copy of the GNU Library General Public License
18 aint with this library; see the file COPYING.LIB. If not, write to
19 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 Boston, MA 02110-1301, USA.
21 */
22
23 #include "config.h"
24
25 #if ENABLE(SVG)
26 #include "RenderSVGContainer.h"
27
28 #include "AXObjectCache.h"
29 #include "FloatQuad.h"
30 #include "GraphicsContext.h"
31 #include "RenderView.h"
32 #include "SVGRenderSupport.h"
33 #include "SVGResourceFilter.h"
34 #include "SVGStyledElement.h"
35 #include "SVGURIReference.h"
36
37 namespace WebCore {
38
RenderSVGContainer(SVGStyledElement * node)39 RenderSVGContainer::RenderSVGContainer(SVGStyledElement* node)
40 : RenderSVGModelObject(node)
41 , m_drawsContents(true)
42 {
43 }
44
drawsContents() const45 bool RenderSVGContainer::drawsContents() const
46 {
47 return m_drawsContents;
48 }
49
setDrawsContents(bool drawsContents)50 void RenderSVGContainer::setDrawsContents(bool drawsContents)
51 {
52 m_drawsContents = drawsContents;
53 }
54
layout()55 void RenderSVGContainer::layout()
56 {
57 ASSERT(needsLayout());
58 ASSERT(!view()->layoutStateEnabled()); // RenderSVGRoot disables layoutState for the SVG rendering tree.
59
60 calcViewport(); // Allow RenderSVGViewportContainer to update its viewport
61
62 LayoutRepainter repainter(*this, checkForRepaintDuringLayout() || selfWillPaint());
63 calculateLocalTransform(); // Allow RenderSVGTransformableContainer to update its transform
64
65 for (RenderObject* child = firstChild(); child; child = child->nextSibling()) {
66 // Only force our kids to layout if we're being asked to relayout as a result of a parent changing
67 // FIXME: We should be able to skip relayout of non-relative kids when only bounds size has changed
68 // that's a possible future optimization using LayoutState
69 // http://bugs.webkit.org/show_bug.cgi?id=15391
70 if (selfNeedsLayout())
71 child->setNeedsLayout(true);
72
73 child->layoutIfNeeded();
74 ASSERT(!child->needsLayout());
75 }
76 repainter.repaintAfterLayout();
77
78 setNeedsLayout(false);
79 }
80
selfWillPaint() const81 bool RenderSVGContainer::selfWillPaint() const
82 {
83 #if ENABLE(FILTERS)
84 const SVGRenderStyle* svgStyle = style()->svgStyle();
85 SVGResourceFilter* filter = getFilterById(document(), svgStyle->filter());
86 if (filter)
87 return true;
88 #endif
89 return false;
90 }
91
paint(PaintInfo & paintInfo,int,int)92 void RenderSVGContainer::paint(PaintInfo& paintInfo, int, int)
93 {
94 if (paintInfo.context->paintingDisabled() || !drawsContents())
95 return;
96
97 // Spec: groups w/o children still may render filter content.
98 if (!firstChild() && !selfWillPaint())
99 return;
100
101 PaintInfo childPaintInfo(paintInfo);
102
103 childPaintInfo.context->save();
104
105 // Let the RenderSVGViewportContainer subclass clip if necessary
106 applyViewportClip(childPaintInfo);
107
108 applyTransformToPaintInfo(childPaintInfo, localToParentTransform());
109
110 SVGResourceFilter* filter = 0;
111 FloatRect boundingBox = repaintRectInLocalCoordinates();
112 if (childPaintInfo.phase == PaintPhaseForeground)
113 prepareToRenderSVGContent(this, childPaintInfo, boundingBox, filter);
114
115 childPaintInfo.paintingRoot = paintingRootForChildren(childPaintInfo);
116 for (RenderObject* child = firstChild(); child; child = child->nextSibling())
117 child->paint(childPaintInfo, 0, 0);
118
119 if (paintInfo.phase == PaintPhaseForeground)
120 finishRenderSVGContent(this, childPaintInfo, filter, paintInfo.context);
121
122 childPaintInfo.context->restore();
123
124 // FIXME: This really should be drawn from local coordinates, but currently we hack it
125 // to avoid our clip killing our outline rect. Thus we translate our
126 // outline rect into parent coords before drawing.
127 // FIXME: This means our focus ring won't share our rotation like it should.
128 // We should instead disable our clip during PaintPhaseOutline
129 IntRect paintRectInParent = enclosingIntRect(localToParentTransform().mapRect(repaintRectInLocalCoordinates()));
130 if ((paintInfo.phase == PaintPhaseOutline || paintInfo.phase == PaintPhaseSelfOutline) && style()->outlineWidth() && style()->visibility() == VISIBLE)
131 paintOutline(paintInfo.context, paintRectInParent.x(), paintRectInParent.y(), paintRectInParent.width(), paintRectInParent.height(), style());
132 }
133
134 // addFocusRingRects is called from paintOutline and needs to be in the same coordinates as the paintOuline call
addFocusRingRects(GraphicsContext * graphicsContext,int,int)135 void RenderSVGContainer::addFocusRingRects(GraphicsContext* graphicsContext, int, int)
136 {
137 IntRect paintRectInParent = enclosingIntRect(localToParentTransform().mapRect(repaintRectInLocalCoordinates()));
138 graphicsContext->addFocusRingRect(paintRectInParent);
139 }
140
objectBoundingBox() const141 FloatRect RenderSVGContainer::objectBoundingBox() const
142 {
143 return computeContainerBoundingBox(this, false);
144 }
145
146 // RenderSVGContainer is used for <g> elements which do not themselves have a
147 // width or height, so we union all of our child rects as our repaint rect.
repaintRectInLocalCoordinates() const148 FloatRect RenderSVGContainer::repaintRectInLocalCoordinates() const
149 {
150 FloatRect repaintRect = computeContainerBoundingBox(this, true);
151
152 // A filter on this container can paint outside of the union of the child repaint rects
153 repaintRect.unite(filterBoundingBoxForRenderer(this));
154
155 return repaintRect;
156 }
157
nodeAtFloatPoint(const HitTestRequest & request,HitTestResult & result,const FloatPoint & pointInParent,HitTestAction hitTestAction)158 bool RenderSVGContainer::nodeAtFloatPoint(const HitTestRequest& request, HitTestResult& result, const FloatPoint& pointInParent, HitTestAction hitTestAction)
159 {
160 // Give RenderSVGViewportContainer a chance to apply its viewport clip
161 if (!pointIsInsideViewportClip(pointInParent))
162 return false;
163
164 FloatPoint localPoint = localToParentTransform().inverse().mapPoint(pointInParent);
165
166 for (RenderObject* child = lastChild(); child; child = child->previousSibling()) {
167 if (child->nodeAtFloatPoint(request, result, localPoint, hitTestAction)) {
168 updateHitTestResult(result, roundedIntPoint(localPoint));
169 return true;
170 }
171 }
172
173 // Spec: Only graphical elements can be targeted by the mouse, period.
174 // 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."
175 return false;
176 }
177
178 }
179
180 #endif // ENABLE(SVG)
181
182 // vim:ts=4:noet
183