1 /* 2 Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann (at) kde.org> 3 2004, 2005, 2007, 2008, 2009 Rob Buis <buis (at) kde.org> 4 2007 Eric Seidel <eric (at) webkit.org> 5 2009 Google, Inc. 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 "RenderSVGRoot.h" 27 28 #include "GraphicsContext.h" 29 #include "RenderSVGContainer.h" 30 #include "RenderView.h" 31 #include "SVGLength.h" 32 #include "SVGRenderSupport.h" 33 #include "SVGSVGElement.h" 34 #include "SVGStyledElement.h" 35 #include "TransformState.h" 36 37 #if ENABLE(FILTERS) 38 #include "SVGResourceFilter.h" 39 #endif 40 41 using namespace std; 42 43 namespace WebCore { 44 45 RenderSVGRoot::RenderSVGRoot(SVGStyledElement* node) 46 : RenderBox(node) 47 { 48 setReplaced(true); 49 } 50 51 int RenderSVGRoot::lineHeight(bool, bool) const 52 { 53 return height() + marginTop() + marginBottom(); 54 } 55 56 int RenderSVGRoot::baselinePosition(bool, bool) const 57 { 58 return height() + marginTop() + marginBottom(); 59 } 60 61 void RenderSVGRoot::calcPrefWidths() 62 { 63 ASSERT(prefWidthsDirty()); 64 65 int paddingAndBorders = paddingLeft() + paddingRight() + borderLeft() + borderRight(); 66 int width = calcReplacedWidth(false) + paddingAndBorders; 67 68 if (style()->maxWidth().isFixed() && style()->maxWidth().value() != undefinedLength) 69 width = min(width, style()->maxWidth().value() + (style()->boxSizing() == CONTENT_BOX ? paddingAndBorders : 0)); 70 71 if (style()->width().isPercent() || (style()->width().isAuto() && style()->height().isPercent())) { 72 m_minPrefWidth = 0; 73 m_maxPrefWidth = width; 74 } else 75 m_minPrefWidth = m_maxPrefWidth = width; 76 77 setPrefWidthsDirty(false); 78 } 79 80 void RenderSVGRoot::layout() 81 { 82 ASSERT(needsLayout()); 83 84 // Arbitrary affine transforms are incompatible with LayoutState. 85 view()->disableLayoutState(); 86 87 LayoutRepainter repainter(*this, checkForRepaintDuringLayout() && selfNeedsLayout()); 88 89 int oldWidth = width(); 90 calcWidth(); 91 92 int oldHeight = height(); 93 calcHeight(); 94 95 SVGSVGElement* svg = static_cast<SVGSVGElement*>(node()); 96 setWidth(static_cast<int>(width() * svg->currentScale())); 97 setHeight(static_cast<int>(height() * svg->currentScale())); 98 calcViewport(); 99 100 // RenderSVGRoot needs to take special care to propagate window size changes to the children, 101 // if the outermost <svg> is using relative x/y/width/height values. Hence the additonal parameters. 102 layoutChildren(this, selfNeedsLayout() || (svg->hasRelativeValues() && (width() != oldWidth || height() != oldHeight))); 103 repainter.repaintAfterLayout(); 104 105 view()->enableLayoutState(); 106 setNeedsLayout(false); 107 } 108 109 bool RenderSVGRoot::selfWillPaint() const 110 { 111 #if ENABLE(FILTERS) 112 const SVGRenderStyle* svgStyle = style()->svgStyle(); 113 SVGResourceFilter* filter = getFilterById(document(), svgStyle->filter(), this); 114 if (filter) 115 return true; 116 #endif 117 return false; 118 } 119 120 void RenderSVGRoot::paint(PaintInfo& paintInfo, int parentX, int parentY) 121 { 122 if (paintInfo.context->paintingDisabled()) 123 return; 124 125 IntPoint parentOriginInContainer(parentX, parentY); 126 IntPoint borderBoxOriginInContainer = parentOriginInContainer + IntSize(x(), y()); 127 128 if (hasBoxDecorations() && (paintInfo.phase == PaintPhaseForeground || paintInfo.phase == PaintPhaseSelection)) 129 paintBoxDecorations(paintInfo, borderBoxOriginInContainer.x(), borderBoxOriginInContainer.y()); 130 131 // An empty viewport disables rendering. FIXME: Should we still render filters? 132 if (m_viewportSize.isEmpty()) 133 return; 134 135 // Don't paint if we don't have kids, except if we have filters we should paint those. 136 if (!firstChild() && !selfWillPaint()) 137 return; 138 139 // Make a copy of the PaintInfo because applyTransformToPaintInfo will modify the damage rect. 140 RenderObject::PaintInfo childPaintInfo(paintInfo); 141 childPaintInfo.context->save(); 142 143 // Apply initial viewport clip - not affected by overflow handling 144 childPaintInfo.context->clip(overflowClipRect(borderBoxOriginInContainer.x(), borderBoxOriginInContainer.y())); 145 146 // Convert from container offsets (html renderers) to a relative transform (svg renderers). 147 // Transform from our paint container's coordinate system to our local coords. 148 applyTransformToPaintInfo(childPaintInfo, localToRepaintContainerTransform(parentOriginInContainer)); 149 150 SVGResourceFilter* filter = 0; 151 FloatRect boundingBox = repaintRectInLocalCoordinates(); 152 153 bool continueRendering = true; 154 if (childPaintInfo.phase == PaintPhaseForeground) 155 continueRendering = prepareToRenderSVGContent(this, childPaintInfo, boundingBox, filter); 156 157 if (continueRendering) 158 RenderBox::paint(childPaintInfo, 0, 0); 159 160 if (childPaintInfo.phase == PaintPhaseForeground) 161 finishRenderSVGContent(this, childPaintInfo, filter, paintInfo.context); 162 163 childPaintInfo.context->restore(); 164 165 if ((paintInfo.phase == PaintPhaseOutline || paintInfo.phase == PaintPhaseSelfOutline) && style()->outlineWidth() && style()->visibility() == VISIBLE) 166 paintOutline(paintInfo.context, borderBoxOriginInContainer.x(), borderBoxOriginInContainer.y(), width(), height(), style()); 167 } 168 169 void RenderSVGRoot::calcViewport() 170 { 171 SVGSVGElement* svg = static_cast<SVGSVGElement*>(node()); 172 173 if (!selfNeedsLayout() && !svg->hasRelativeValues()) 174 return; 175 176 if (!svg->hasSetContainerSize()) { 177 // In the normal case of <svg> being stand-alone or in a CSSBoxModel object we use 178 // RenderBox::width()/height() (which pulls data from RenderStyle) 179 m_viewportSize = FloatSize(width(), height()); 180 } else { 181 // In the SVGImage case grab the SVGLength values off of SVGSVGElement and use 182 // the special relativeWidthValue accessors which respect the specified containerSize 183 SVGLength width = svg->width(); 184 SVGLength height = svg->height(); 185 float viewportWidth = (width.unitType() == LengthTypePercentage) ? svg->relativeWidthValue() : width.value(svg); 186 float viewportHeight = (height.unitType() == LengthTypePercentage) ? svg->relativeHeightValue() : height.value(svg); 187 m_viewportSize = FloatSize(viewportWidth, viewportHeight); 188 } 189 } 190 191 // RenderBox methods will expect coordinates w/o any transforms in coordinates 192 // relative to our borderBox origin. This method gives us exactly that. 193 AffineTransform RenderSVGRoot::localToBorderBoxTransform() const 194 { 195 IntSize borderAndPadding = borderOriginToContentBox(); 196 SVGSVGElement* svg = static_cast<SVGSVGElement*>(node()); 197 float scale = svg->currentScale(); 198 AffineTransform ctm(scale, 0, 0, scale, borderAndPadding.width(), borderAndPadding.height()); 199 ctm.translate(svg->currentTranslate().x(), svg->currentTranslate().y()); 200 return svg->viewBoxToViewTransform(width(), height()) * ctm; 201 } 202 203 IntSize RenderSVGRoot::parentOriginToBorderBox() const 204 { 205 return IntSize(x(), y()); 206 } 207 208 IntSize RenderSVGRoot::borderOriginToContentBox() const 209 { 210 return IntSize(borderLeft() + paddingLeft(), borderTop() + paddingTop()); 211 } 212 213 AffineTransform RenderSVGRoot::localToRepaintContainerTransform(const IntPoint& parentOriginInContainer) const 214 { 215 AffineTransform parentToContainer(localToParentTransform()); 216 return parentToContainer.translateRight(parentOriginInContainer.x(), parentOriginInContainer.y()); 217 } 218 219 const AffineTransform& RenderSVGRoot::localToParentTransform() const 220 { 221 IntSize parentToBorderBoxOffset = parentOriginToBorderBox(); 222 223 AffineTransform borderBoxOriginToParentOrigin(localToBorderBoxTransform()); 224 borderBoxOriginToParentOrigin.translateRight(parentToBorderBoxOffset.width(), parentToBorderBoxOffset.height()); 225 226 m_localToParentTransform = borderBoxOriginToParentOrigin; 227 return m_localToParentTransform; 228 } 229 230 FloatRect RenderSVGRoot::objectBoundingBox() const 231 { 232 return computeContainerBoundingBox(this, false); 233 } 234 235 FloatRect RenderSVGRoot::repaintRectInLocalCoordinates() const 236 { 237 // FIXME: This does not include the border but it should! 238 FloatRect repaintRect = computeContainerBoundingBox(this, true); 239 style()->svgStyle()->inflateForShadow(repaintRect); 240 return repaintRect; 241 } 242 243 AffineTransform RenderSVGRoot::localTransform() const 244 { 245 return AffineTransform(); 246 } 247 248 void RenderSVGRoot::computeRectForRepaint(RenderBoxModelObject* repaintContainer, IntRect& repaintRect, bool fixed) 249 { 250 // Apply our local transforms (except for x/y translation), then our shadow, 251 // and then call RenderBox's method to handle all the normal CSS Box model bits 252 repaintRect = localToBorderBoxTransform().mapRect(repaintRect); 253 254 // Apply initial viewport clip - not affected by overflow settings 255 repaintRect.intersect(enclosingIntRect(FloatRect(FloatPoint(), m_viewportSize))); 256 257 style()->svgStyle()->inflateForShadow(repaintRect); 258 RenderBox::computeRectForRepaint(repaintContainer, repaintRect, fixed); 259 } 260 261 void RenderSVGRoot::mapLocalToContainer(RenderBoxModelObject* repaintContainer, bool fixed , bool useTransforms, TransformState& transformState) const 262 { 263 ASSERT(!fixed); // We should have no fixed content in the SVG rendering tree. 264 ASSERT(useTransforms); // mapping a point through SVG w/o respecting trasnforms is useless. 265 266 // Transform to our border box and let RenderBox transform the rest of the way. 267 transformState.applyTransform(localToBorderBoxTransform()); 268 RenderBox::mapLocalToContainer(repaintContainer, fixed, useTransforms, transformState); 269 } 270 271 bool RenderSVGRoot::nodeAtPoint(const HitTestRequest& request, HitTestResult& result, int _x, int _y, int _tx, int _ty, HitTestAction hitTestAction) 272 { 273 IntPoint pointInContainer(_x, _y); 274 IntSize containerToParentOffset(_tx, _ty); 275 276 IntPoint pointInParent = pointInContainer - containerToParentOffset; 277 IntPoint pointInBorderBox = pointInParent - parentOriginToBorderBox(); 278 279 // Note: For now, we're ignoring hits to border and padding for <svg> 280 IntPoint pointInContentBox = pointInBorderBox - borderOriginToContentBox(); 281 if (!contentBoxRect().contains(pointInContentBox)) 282 return false; 283 284 IntPoint localPoint = localToParentTransform().inverse().mapPoint(pointInParent); 285 286 for (RenderObject* child = lastChild(); child; child = child->previousSibling()) { 287 if (child->nodeAtFloatPoint(request, result, localPoint, hitTestAction)) { 288 // FIXME: CSS/HTML assumes the local point is relative to the border box, right? 289 updateHitTestResult(result, pointInBorderBox); 290 return true; 291 } 292 } 293 294 // Spec: Only graphical elements can be targeted by the mouse, so we don't check self here. 295 // 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." 296 return false; 297 } 298 299 } 300 301 #endif // ENABLE(SVG) 302
