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/rendering/HitTestResult.h" 27#include "core/rendering/LayoutRectRecorder.h" 28#include "core/rendering/LayoutRepainter.h" 29#include "core/rendering/RenderView.h" 30#include "core/rendering/svg/SVGRenderSupport.h" 31#include "core/rendering/svg/SVGRenderingContext.h" 32#include "core/rendering/svg/SVGResourcesCache.h" 33#include "core/svg/SVGForeignObjectElement.h" 34#include "platform/graphics/GraphicsContextStateSaver.h" 35 36namespace WebCore { 37 38RenderSVGForeignObject::RenderSVGForeignObject(SVGForeignObjectElement* node) 39 : RenderSVGBlock(node) 40 , m_needsTransformUpdate(true) 41{ 42} 43 44RenderSVGForeignObject::~RenderSVGForeignObject() 45{ 46} 47 48void RenderSVGForeignObject::paint(PaintInfo& paintInfo, const LayoutPoint&) 49{ 50 if (paintInfo.context->paintingDisabled() 51 || (paintInfo.phase != PaintPhaseForeground && paintInfo.phase != PaintPhaseSelection)) 52 return; 53 54 PaintInfo childPaintInfo(paintInfo); 55 GraphicsContextStateSaver stateSaver(*childPaintInfo.context); 56 childPaintInfo.applyTransform(localTransform()); 57 58 if (SVGRenderSupport::isOverflowHidden(this)) 59 childPaintInfo.context->clip(m_viewport); 60 61 SVGRenderingContext renderingContext; 62 bool continueRendering = true; 63 if (paintInfo.phase == PaintPhaseForeground) { 64 renderingContext.prepareToRenderSVGContent(this, childPaintInfo); 65 continueRendering = renderingContext.isRenderingPrepared(); 66 } 67 68 if (continueRendering) { 69 // Paint all phases of FO elements atomically, as though the FO element established its 70 // own stacking context. 71 bool preservePhase = paintInfo.phase == PaintPhaseSelection || paintInfo.phase == PaintPhaseTextClip; 72 LayoutPoint childPoint = IntPoint(); 73 childPaintInfo.phase = preservePhase ? paintInfo.phase : PaintPhaseBlockBackground; 74 RenderBlock::paint(childPaintInfo, IntPoint()); 75 if (!preservePhase) { 76 childPaintInfo.phase = PaintPhaseChildBlockBackgrounds; 77 RenderBlock::paint(childPaintInfo, childPoint); 78 childPaintInfo.phase = PaintPhaseFloat; 79 RenderBlock::paint(childPaintInfo, childPoint); 80 childPaintInfo.phase = PaintPhaseForeground; 81 RenderBlock::paint(childPaintInfo, childPoint); 82 childPaintInfo.phase = PaintPhaseOutline; 83 RenderBlock::paint(childPaintInfo, childPoint); 84 } 85 } 86} 87 88LayoutRect RenderSVGForeignObject::clippedOverflowRectForRepaint(const RenderLayerModelObject* repaintContainer) const 89{ 90 return SVGRenderSupport::clippedOverflowRectForRepaint(this, repaintContainer); 91} 92 93void RenderSVGForeignObject::computeFloatRectForRepaint(const RenderLayerModelObject* repaintContainer, FloatRect& repaintRect, bool fixed) const 94{ 95 SVGRenderSupport::computeFloatRectForRepaint(this, repaintContainer, repaintRect, fixed); 96} 97 98const AffineTransform& RenderSVGForeignObject::localToParentTransform() const 99{ 100 m_localToParentTransform = localTransform(); 101 m_localToParentTransform.translate(m_viewport.x(), m_viewport.y()); 102 return m_localToParentTransform; 103} 104 105void RenderSVGForeignObject::updateLogicalWidth() 106{ 107 // FIXME: Investigate in size rounding issues 108 // FIXME: Remove unnecessary rounding when layout is off ints: webkit.org/b/63656 109 setWidth(static_cast<int>(roundf(m_viewport.width()))); 110} 111 112void RenderSVGForeignObject::computeLogicalHeight(LayoutUnit, LayoutUnit logicalTop, LogicalExtentComputedValues& computedValues) const 113{ 114 // FIXME: Investigate in size rounding issues 115 // FIXME: Remove unnecessary rounding when layout is off ints: webkit.org/b/63656 116 // FIXME: Is this correct for vertical writing mode? 117 computedValues.m_extent = static_cast<int>(roundf(m_viewport.height())); 118 computedValues.m_position = logicalTop; 119} 120 121void RenderSVGForeignObject::layout() 122{ 123 ASSERT(needsLayout()); 124 ASSERT(!view()->layoutStateEnabled()); // RenderSVGRoot disables layoutState for the SVG rendering tree. 125 126 LayoutRectRecorder recorder(*this); 127 LayoutRepainter repainter(*this, SVGRenderSupport::checkForSVGRepaintDuringLayout(this)); 128 SVGForeignObjectElement* foreign = toSVGForeignObjectElement(node()); 129 130 bool updateCachedBoundariesInParents = false; 131 if (m_needsTransformUpdate) { 132 m_localTransform = foreign->animatedLocalTransform(); 133 m_needsTransformUpdate = false; 134 updateCachedBoundariesInParents = true; 135 } 136 137 FloatRect oldViewport = m_viewport; 138 139 // Cache viewport boundaries 140 SVGLengthContext lengthContext(foreign); 141 FloatPoint viewportLocation(foreign->xCurrentValue().value(lengthContext), foreign->yCurrentValue().value(lengthContext)); 142 m_viewport = FloatRect(viewportLocation, FloatSize(foreign->widthCurrentValue().value(lengthContext), foreign->heightCurrentValue().value(lengthContext))); 143 if (!updateCachedBoundariesInParents) 144 updateCachedBoundariesInParents = oldViewport != m_viewport; 145 146 // Set box origin to the foreignObject x/y translation, so positioned objects in XHTML content get correct 147 // positions. A regular RenderBoxModelObject would pull this information from RenderStyle - in SVG those 148 // properties are ignored for non <svg> elements, so we mimic what happens when specifying them through CSS. 149 150 // FIXME: Investigate in location rounding issues - only affects RenderSVGForeignObject & RenderSVGText 151 setLocation(roundedIntPoint(viewportLocation)); 152 153 bool layoutChanged = everHadLayout() && selfNeedsLayout(); 154 RenderBlock::layout(); 155 ASSERT(!needsLayout()); 156 157 // If our bounds changed, notify the parents. 158 if (updateCachedBoundariesInParents) 159 RenderSVGBlock::setNeedsBoundariesUpdate(); 160 161 // Invalidate all resources of this client if our layout changed. 162 if (layoutChanged) 163 SVGResourcesCache::clientLayoutChanged(this); 164 165 repainter.repaintAfterLayout(); 166} 167 168bool RenderSVGForeignObject::nodeAtFloatPoint(const HitTestRequest& request, HitTestResult& result, const FloatPoint& pointInParent, HitTestAction hitTestAction) 169{ 170 // Embedded content is drawn in the foreground phase. 171 if (hitTestAction != HitTestForeground) 172 return false; 173 174 FloatPoint localPoint = localTransform().inverse().mapPoint(pointInParent); 175 176 // Early exit if local point is not contained in clipped viewport area 177 if (SVGRenderSupport::isOverflowHidden(this) && !m_viewport.contains(localPoint)) 178 return false; 179 180 // FOs establish a stacking context, so we need to hit-test all layers. 181 HitTestLocation hitTestLocation(roundedLayoutPoint(localPoint)); 182 return RenderBlock::nodeAtPoint(request, result, hitTestLocation, LayoutPoint(), HitTestForeground) 183 || RenderBlock::nodeAtPoint(request, result, hitTestLocation, LayoutPoint(), HitTestFloat) 184 || RenderBlock::nodeAtPoint(request, result, hitTestLocation, LayoutPoint(), HitTestChildBlockBackgrounds); 185} 186 187bool RenderSVGForeignObject::nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation&, const LayoutPoint&, HitTestAction) 188{ 189 ASSERT_NOT_REACHED(); 190 return false; 191} 192 193void RenderSVGForeignObject::mapLocalToContainer(const RenderLayerModelObject* repaintContainer, TransformState& transformState, MapCoordinatesFlags, bool* wasFixed) const 194{ 195 SVGRenderSupport::mapLocalToContainer(this, repaintContainer, transformState, wasFixed); 196} 197 198const RenderObject* RenderSVGForeignObject::pushMappingToContainer(const RenderLayerModelObject* ancestorToStopAt, RenderGeometryMap& geometryMap) const 199{ 200 return SVGRenderSupport::pushMappingToContainer(this, ancestorToStopAt, geometryMap); 201} 202 203} 204