2 * Copyright (C) 2006 Apple Computer, Inc.
3 * Copyright (C) 2009 Google, Inc.
4 * Copyright (C) Research In Motion Limited 2010. All rights reserved.
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.
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.
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.
24 #include "core/rendering/svg/RenderSVGForeignObject.h"
26 #include "core/paint/SVGForeignObjectPainter.h"
27 #include "core/rendering/HitTestResult.h"
28 #include "core/rendering/RenderView.h"
29 #include "core/rendering/svg/SVGRenderSupport.h"
30 #include "core/rendering/svg/SVGResourcesCache.h"
31 #include "core/svg/SVGForeignObjectElement.h"
35 RenderSVGForeignObject::RenderSVGForeignObject(SVGForeignObjectElement* node)
36 : RenderSVGBlock(node)
37 , m_needsTransformUpdate(true)
41 RenderSVGForeignObject::~RenderSVGForeignObject()
45 bool RenderSVGForeignObject::isChildAllowed(RenderObject* child, RenderStyle* style) const
47 // Disallow arbitary SVG content. Only allow proper <svg xmlns="svgNS"> subdocuments.
48 return !child->isSVG() || child->isSVGRoot();
51 void RenderSVGForeignObject::paint(PaintInfo& paintInfo, const LayoutPoint&)
53 SVGForeignObjectPainter(*this).paint(paintInfo);
56 const AffineTransform& RenderSVGForeignObject::localToParentTransform() const
58 m_localToParentTransform = localTransform();
59 m_localToParentTransform.translate(m_viewport.x(), m_viewport.y());
60 return m_localToParentTransform;
63 void RenderSVGForeignObject::updateLogicalWidth()
65 // FIXME: Investigate in size rounding issues
66 // FIXME: Remove unnecessary rounding when layout is off ints: webkit.org/b/63656
67 setWidth(static_cast<int>(roundf(m_viewport.width())));
70 void RenderSVGForeignObject::computeLogicalHeight(LayoutUnit, LayoutUnit logicalTop, LogicalExtentComputedValues& computedValues) const
72 // FIXME: Investigate in size rounding issues
73 // FIXME: Remove unnecessary rounding when layout is off ints: webkit.org/b/63656
74 // FIXME: Is this correct for vertical writing mode?
75 computedValues.m_extent = static_cast<int>(roundf(m_viewport.height()));
76 computedValues.m_position = logicalTop;
79 void RenderSVGForeignObject::layout()
81 ASSERT(needsLayout());
83 SVGForeignObjectElement* foreign = toSVGForeignObjectElement(node());
85 bool updateCachedBoundariesInParents = false;
86 if (m_needsTransformUpdate) {
87 m_localTransform = foreign->animatedLocalTransform();
88 m_needsTransformUpdate = false;
89 updateCachedBoundariesInParents = true;
92 FloatRect oldViewport = m_viewport;
94 // Cache viewport boundaries
95 SVGLengthContext lengthContext(foreign);
96 FloatPoint viewportLocation(foreign->x()->currentValue()->value(lengthContext), foreign->y()->currentValue()->value(lengthContext));
97 m_viewport = FloatRect(viewportLocation, FloatSize(foreign->width()->currentValue()->value(lengthContext), foreign->height()->currentValue()->value(lengthContext)));
98 if (!updateCachedBoundariesInParents)
99 updateCachedBoundariesInParents = oldViewport != m_viewport;
101 // Set box origin to the foreignObject x/y translation, so positioned objects in XHTML content get correct
102 // positions. A regular RenderBoxModelObject would pull this information from RenderStyle - in SVG those
103 // properties are ignored for non <svg> elements, so we mimic what happens when specifying them through CSS.
105 // FIXME: Investigate in location rounding issues - only affects RenderSVGForeignObject & RenderSVGText
106 setLocation(roundedIntPoint(viewportLocation));
108 bool layoutChanged = everHadLayout() && selfNeedsLayout();
109 RenderBlock::layout();
110 ASSERT(!needsLayout());
112 // If our bounds changed, notify the parents.
113 if (updateCachedBoundariesInParents)
114 RenderSVGBlock::setNeedsBoundariesUpdate();
116 // Invalidate all resources of this client if our layout changed.
118 SVGResourcesCache::clientLayoutChanged(this);
121 void RenderSVGForeignObject::mapRectToPaintInvalidationBacking(const RenderLayerModelObject* paintInvalidationContainer, LayoutRect& rect, const PaintInvalidationState* paintInvalidationState) const
124 r.inflate(style()->outlineWidth());
125 SVGRenderSupport::computeFloatRectForPaintInvalidation(this, paintInvalidationContainer, r, paintInvalidationState);
126 rect = enclosingLayoutRect(r);
129 bool RenderSVGForeignObject::nodeAtFloatPoint(const HitTestRequest& request, HitTestResult& result, const FloatPoint& pointInParent, HitTestAction hitTestAction)
131 // Embedded content is drawn in the foreground phase.
132 if (hitTestAction != HitTestForeground)
135 AffineTransform localTransform = this->localTransform();
136 if (!localTransform.isInvertible())
139 FloatPoint localPoint = localTransform.inverse().mapPoint(pointInParent);
141 // Early exit if local point is not contained in clipped viewport area
142 if (SVGRenderSupport::isOverflowHidden(this) && !m_viewport.contains(localPoint))
145 // FOs establish a stacking context, so we need to hit-test all layers.
146 HitTestLocation hitTestLocation(roundedLayoutPoint(localPoint));
147 return RenderBlock::nodeAtPoint(request, result, hitTestLocation, LayoutPoint(), HitTestForeground)
148 || RenderBlock::nodeAtPoint(request, result, hitTestLocation, LayoutPoint(), HitTestFloat)
149 || RenderBlock::nodeAtPoint(request, result, hitTestLocation, LayoutPoint(), HitTestChildBlockBackgrounds);