1/* 2 * Copyright (c) 2009, Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31#include "config.h" 32#include "RenderSVGModelObject.h" 33 34#include "RenderLayerModelObject.h" 35#include "RenderSVGResource.h" 36#include "SVGNames.h" 37#include "SVGResourcesCache.h" 38#include "ShadowRoot.h" 39 40namespace WebCore { 41 42RenderSVGModelObject::RenderSVGModelObject(SVGElement& element, PassRef<RenderStyle> style) 43 : RenderElement(element, WTF::move(style), 0) 44 , m_hasSVGShadow(false) 45{ 46} 47 48LayoutRect RenderSVGModelObject::clippedOverflowRectForRepaint(const RenderLayerModelObject* repaintContainer) const 49{ 50 return SVGRenderSupport::clippedOverflowRectForRepaint(*this, repaintContainer); 51} 52 53void RenderSVGModelObject::computeFloatRectForRepaint(const RenderLayerModelObject* repaintContainer, FloatRect& repaintRect, bool fixed) const 54{ 55 SVGRenderSupport::computeFloatRectForRepaint(*this, repaintContainer, repaintRect, fixed); 56} 57 58void RenderSVGModelObject::mapLocalToContainer(const RenderLayerModelObject* repaintContainer, TransformState& transformState, MapCoordinatesFlags, bool* wasFixed) const 59{ 60 SVGRenderSupport::mapLocalToContainer(*this, repaintContainer, transformState, wasFixed); 61} 62 63const RenderObject* RenderSVGModelObject::pushMappingToContainer(const RenderLayerModelObject* ancestorToStopAt, RenderGeometryMap& geometryMap) const 64{ 65 return SVGRenderSupport::pushMappingToContainer(*this, ancestorToStopAt, geometryMap); 66} 67 68// Copied from RenderBox, this method likely requires further refactoring to work easily for both SVG and CSS Box Model content. 69// FIXME: This may also need to move into SVGRenderSupport as the RenderBox version depends 70// on borderBoundingBox() which SVG RenderBox subclases (like SVGRenderBlock) do not implement. 71LayoutRect RenderSVGModelObject::outlineBoundsForRepaint(const RenderLayerModelObject* repaintContainer, const RenderGeometryMap*) const 72{ 73 LayoutRect box = enclosingLayoutRect(repaintRectInLocalCoordinates()); 74 adjustRectForOutlineAndShadow(box); 75 76 FloatQuad containerRelativeQuad = localToContainerQuad(FloatRect(box), repaintContainer); 77 return LayoutRect(pixelSnappedForPainting(LayoutRect(containerRelativeQuad.boundingBox()), document().deviceScaleFactor())); 78} 79 80void RenderSVGModelObject::absoluteRects(Vector<IntRect>& rects, const LayoutPoint& accumulatedOffset) const 81{ 82 IntRect rect = enclosingIntRect(strokeBoundingBox()); 83 rect.moveBy(roundedIntPoint(accumulatedOffset)); 84 rects.append(rect); 85} 86 87void RenderSVGModelObject::absoluteQuads(Vector<FloatQuad>& quads, bool* wasFixed) const 88{ 89 quads.append(localToAbsoluteQuad(strokeBoundingBox(), 0 /* mode */, wasFixed)); 90} 91 92void RenderSVGModelObject::willBeDestroyed() 93{ 94 SVGResourcesCache::clientDestroyed(*this); 95 RenderElement::willBeDestroyed(); 96} 97 98void RenderSVGModelObject::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle) 99{ 100 if (diff == StyleDifferenceLayout) { 101 setNeedsBoundariesUpdate(); 102 if (style().hasTransform()) 103 setNeedsTransformUpdate(); 104 } 105 RenderElement::styleDidChange(diff, oldStyle); 106 SVGResourcesCache::clientStyleChanged(*this, diff, style()); 107} 108 109bool RenderSVGModelObject::nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation&, const LayoutPoint&, HitTestAction) 110{ 111 ASSERT_NOT_REACHED(); 112 return false; 113} 114 115static void getElementCTM(SVGElement* element, AffineTransform& transform) 116{ 117 ASSERT(element); 118 element->document().updateLayoutIgnorePendingStylesheets(); 119 120 SVGElement* stopAtElement = SVGLocatable::nearestViewportElement(element); 121 ASSERT(stopAtElement); 122 123 AffineTransform localTransform; 124 Node* current = element; 125 126 while (current && current->isSVGElement()) { 127 SVGElement* currentElement = toSVGElement(current); 128 localTransform = currentElement->renderer()->localToParentTransform(); 129 transform = localTransform.multiply(transform); 130 // For getCTM() computation, stop at the nearest viewport element 131 if (currentElement == stopAtElement) 132 break; 133 134 current = current->parentOrShadowHostNode(); 135 } 136} 137 138// FloatRect::intersects does not consider horizontal or vertical lines (because of isEmpty()). 139// So special-case handling of such lines. 140static bool intersectsAllowingEmpty(const FloatRect& r, const FloatRect& other) 141{ 142 if (r.isEmpty() && other.isEmpty()) 143 return false; 144 if (r.isEmpty() && !other.isEmpty()) { 145 return (other.contains(r.x(), r.y()) && !other.contains(r.maxX(), r.maxY())) 146 || (!other.contains(r.x(), r.y()) && other.contains(r.maxX(), r.maxY())); 147 } 148 if (other.isEmpty() && !r.isEmpty()) 149 return intersectsAllowingEmpty(other, r); 150 return r.intersects(other); 151} 152 153// One of the element types that can cause graphics to be drawn onto the target canvas. Specifically: circle, ellipse, 154// image, line, path, polygon, polyline, rect, text and use. 155static bool isGraphicsElement(const RenderElement& renderer) 156{ 157 return renderer.isSVGShape() || renderer.isSVGText() || renderer.isSVGImage() || renderer.element()->hasTagName(SVGNames::useTag); 158} 159 160// The SVG addFocusRingRects() method adds rects in local coordinates so the default absoluteFocusRingQuads 161// returns incorrect values for SVG objects. Overriding this method provides access to the absolute bounds. 162void RenderSVGModelObject::absoluteFocusRingQuads(Vector<FloatQuad>& quads) 163{ 164 quads.append(localToAbsoluteQuad(FloatQuad(repaintRectInLocalCoordinates()))); 165} 166 167bool RenderSVGModelObject::checkIntersection(RenderElement* renderer, const FloatRect& rect) 168{ 169 if (!renderer || renderer->style().pointerEvents() == PE_NONE) 170 return false; 171 if (!isGraphicsElement(*renderer)) 172 return false; 173 AffineTransform ctm; 174 SVGElement* svgElement = toSVGElement(renderer->element()); 175 getElementCTM(svgElement, ctm); 176 ASSERT(svgElement->renderer()); 177 return intersectsAllowingEmpty(rect, ctm.mapRect(svgElement->renderer()->repaintRectInLocalCoordinates())); 178} 179 180bool RenderSVGModelObject::checkEnclosure(RenderElement* renderer, const FloatRect& rect) 181{ 182 if (!renderer || renderer->style().pointerEvents() == PE_NONE) 183 return false; 184 if (!isGraphicsElement(*renderer)) 185 return false; 186 AffineTransform ctm; 187 SVGElement* svgElement = toSVGElement(renderer->element()); 188 getElementCTM(svgElement, ctm); 189 ASSERT(svgElement->renderer()); 190 return rect.contains(ctm.mapRect(svgElement->renderer()->repaintRectInLocalCoordinates())); 191} 192 193} // namespace WebCore 194