1/* 2 * Copyright (C) 2006 Apple Computer, Inc. 3 * Copyright (C) 2009 Google, Inc. 4 * Copyright (C) Research In Motion Limited 2010. All rights reserved. 5 * 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. 10 * 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. 15 * 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. 20 */ 21 22#include "config.h" 23 24#include "core/rendering/svg/RenderSVGForeignObject.h" 25 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" 32 33namespace blink { 34 35RenderSVGForeignObject::RenderSVGForeignObject(SVGForeignObjectElement* node) 36 : RenderSVGBlock(node) 37 , m_needsTransformUpdate(true) 38{ 39} 40 41RenderSVGForeignObject::~RenderSVGForeignObject() 42{ 43} 44 45bool RenderSVGForeignObject::isChildAllowed(RenderObject* child, RenderStyle* style) const 46{ 47 // Disallow arbitary SVG content. Only allow proper <svg xmlns="svgNS"> subdocuments. 48 return !child->isSVG() || child->isSVGRoot(); 49} 50 51void RenderSVGForeignObject::paint(PaintInfo& paintInfo, const LayoutPoint&) 52{ 53 SVGForeignObjectPainter(*this).paint(paintInfo); 54} 55 56const AffineTransform& RenderSVGForeignObject::localToParentTransform() const 57{ 58 m_localToParentTransform = localTransform(); 59 m_localToParentTransform.translate(m_viewport.x(), m_viewport.y()); 60 return m_localToParentTransform; 61} 62 63void RenderSVGForeignObject::updateLogicalWidth() 64{ 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()))); 68} 69 70void RenderSVGForeignObject::computeLogicalHeight(LayoutUnit, LayoutUnit logicalTop, LogicalExtentComputedValues& computedValues) const 71{ 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; 77} 78 79void RenderSVGForeignObject::layout() 80{ 81 ASSERT(needsLayout()); 82 83 SVGForeignObjectElement* foreign = toSVGForeignObjectElement(node()); 84 85 bool updateCachedBoundariesInParents = false; 86 if (m_needsTransformUpdate) { 87 m_localTransform = foreign->animatedLocalTransform(); 88 m_needsTransformUpdate = false; 89 updateCachedBoundariesInParents = true; 90 } 91 92 FloatRect oldViewport = m_viewport; 93 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; 100 101 // 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. 104 105 // FIXME: Investigate in location rounding issues - only affects RenderSVGForeignObject & RenderSVGText 106 setLocation(roundedIntPoint(viewportLocation)); 107 108 bool layoutChanged = everHadLayout() && selfNeedsLayout(); 109 RenderBlock::layout(); 110 ASSERT(!needsLayout()); 111 112 // If our bounds changed, notify the parents. 113 if (updateCachedBoundariesInParents) 114 RenderSVGBlock::setNeedsBoundariesUpdate(); 115 116 // Invalidate all resources of this client if our layout changed. 117 if (layoutChanged) 118 SVGResourcesCache::clientLayoutChanged(this); 119} 120 121void RenderSVGForeignObject::mapRectToPaintInvalidationBacking(const RenderLayerModelObject* paintInvalidationContainer, LayoutRect& rect, const PaintInvalidationState* paintInvalidationState) const 122{ 123 FloatRect r(rect); 124 r.inflate(style()->outlineWidth()); 125 SVGRenderSupport::computeFloatRectForPaintInvalidation(this, paintInvalidationContainer, r, paintInvalidationState); 126 rect = enclosingLayoutRect(r); 127} 128 129bool RenderSVGForeignObject::nodeAtFloatPoint(const HitTestRequest& request, HitTestResult& result, const FloatPoint& pointInParent, HitTestAction hitTestAction) 130{ 131 // Embedded content is drawn in the foreground phase. 132 if (hitTestAction != HitTestForeground) 133 return false; 134 135 AffineTransform localTransform = this->localTransform(); 136 if (!localTransform.isInvertible()) 137 return false; 138 139 FloatPoint localPoint = localTransform.inverse().mapPoint(pointInParent); 140 141 // Early exit if local point is not contained in clipped viewport area 142 if (SVGRenderSupport::isOverflowHidden(this) && !m_viewport.contains(localPoint)) 143 return false; 144 145 // 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); 150} 151 152} 153