Source/WebCore/svg/SVGPatternElement.cpp

   1 /*
   2  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
   3  * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
   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 #if ENABLE(SVG)
  25 #include "SVGPatternElement.h"
  26
  27 #include "AffineTransform.h"
  28 #include "Attribute.h"
  29 #include "Document.h"
  30 #include "FloatConversion.h"
  31 #include "GraphicsContext.h"
  32 #include "ImageBuffer.h"
  33 #include "PatternAttributes.h"
  34 #include "RenderSVGContainer.h"
  35 #include "RenderSVGResourcePattern.h"
  36 #include "SVGElementInstance.h"
  37 #include "SVGNames.h"
  38 #include "SVGRenderSupport.h"
  39 #include "SVGSVGElement.h"
  40 #include "SVGStyledTransformableElement.h"
  41 #include "SVGTransformable.h"
  42
  43 namespace WebCore {
  44
  45 // Animated property definitions
  46 DEFINE_ANIMATED_LENGTH(SVGPatternElement, SVGNames::xAttr, X, x)
  47 DEFINE_ANIMATED_LENGTH(SVGPatternElement, SVGNames::yAttr, Y, y)
  48 DEFINE_ANIMATED_LENGTH(SVGPatternElement, SVGNames::widthAttr, Width, width)
  49 DEFINE_ANIMATED_LENGTH(SVGPatternElement, SVGNames::heightAttr, Height, height)
  50 DEFINE_ANIMATED_ENUMERATION(SVGPatternElement, SVGNames::patternUnitsAttr, PatternUnits, patternUnits, SVGUnitTypes::SVGUnitType)
  51 DEFINE_ANIMATED_ENUMERATION(SVGPatternElement, SVGNames::patternContentUnitsAttr, PatternContentUnits, patternContentUnits, SVGUnitTypes::SVGUnitType)
  52 DEFINE_ANIMATED_TRANSFORM_LIST(SVGPatternElement, SVGNames::patternTransformAttr, PatternTransform, patternTransform)
  53 DEFINE_ANIMATED_STRING(SVGPatternElement, XLinkNames::hrefAttr, Href, href)
  54 DEFINE_ANIMATED_BOOLEAN(SVGPatternElement, SVGNames::externalResourcesRequiredAttr, ExternalResourcesRequired, externalResourcesRequired)
  55 DEFINE_ANIMATED_RECT(SVGPatternElement, SVGNames::viewBoxAttr, ViewBox, viewBox)
  56 DEFINE_ANIMATED_PRESERVEASPECTRATIO(SVGPatternElement, SVGNames::preserveAspectRatioAttr, PreserveAspectRatio, preserveAspectRatio)
  57
  58 BEGIN_REGISTER_ANIMATED_PROPERTIES(SVGPatternElement)
  59     REGISTER_LOCAL_ANIMATED_PROPERTY(x)
  60     REGISTER_LOCAL_ANIMATED_PROPERTY(y)
  61     REGISTER_LOCAL_ANIMATED_PROPERTY(width)
  62     REGISTER_LOCAL_ANIMATED_PROPERTY(height)
  63     REGISTER_LOCAL_ANIMATED_PROPERTY(patternUnits)
  64     REGISTER_LOCAL_ANIMATED_PROPERTY(patternContentUnits)
  65     REGISTER_LOCAL_ANIMATED_PROPERTY(patternTransform)
  66     REGISTER_LOCAL_ANIMATED_PROPERTY(href)
  67     REGISTER_LOCAL_ANIMATED_PROPERTY(externalResourcesRequired)
  68     REGISTER_LOCAL_ANIMATED_PROPERTY(viewBox)
  69     REGISTER_LOCAL_ANIMATED_PROPERTY(preserveAspectRatio)
  70     REGISTER_PARENT_ANIMATED_PROPERTIES(SVGStyledElement)
  71     REGISTER_PARENT_ANIMATED_PROPERTIES(SVGTests)
  72 END_REGISTER_ANIMATED_PROPERTIES
  73
  74 inline SVGPatternElement::SVGPatternElement(const QualifiedName& tagName, Document* document)
  75     : SVGStyledElement(tagName, document)
  76     , m_x(LengthModeWidth)
  77     , m_y(LengthModeHeight)
  78     , m_width(LengthModeWidth)
  79     , m_height(LengthModeHeight)
  80     , m_patternUnits(SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX)
  81     , m_patternContentUnits(SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE)
  82 {
  83     ASSERT(hasTagName(SVGNames::patternTag));
  84     registerAnimatedPropertiesForSVGPatternElement();
  85 }
  86
  87 PassRefPtr<SVGPatternElement> SVGPatternElement::create(const QualifiedName& tagName, Document* document)
  88 {
  89     return adoptRef(new SVGPatternElement(tagName, document));
  90 }
  91
  92 bool SVGPatternElement::isSupportedAttribute(const QualifiedName& attrName)
  93 {
  94     DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
  95     if (supportedAttributes.isEmpty()) {
  96         SVGURIReference::addSupportedAttributes(supportedAttributes);
  97         SVGTests::addSupportedAttributes(supportedAttributes);
  98         SVGLangSpace::addSupportedAttributes(supportedAttributes);
  99         SVGExternalResourcesRequired::addSupportedAttributes(supportedAttributes);
 100         SVGFitToViewBox::addSupportedAttributes(supportedAttributes);
 101         supportedAttributes.add(SVGNames::patternUnitsAttr);
 102         supportedAttributes.add(SVGNames::patternContentUnitsAttr);
 103         supportedAttributes.add(SVGNames::patternTransformAttr);
 104         supportedAttributes.add(SVGNames::xAttr);
 105         supportedAttributes.add(SVGNames::yAttr);
 106         supportedAttributes.add(SVGNames::widthAttr);
 107         supportedAttributes.add(SVGNames::heightAttr);
 108     }
 109     return supportedAttributes.contains<QualifiedName, SVGAttributeHashTranslator>(attrName);
 110 }
 111
 112 void SVGPatternElement::parseMappedAttribute(Attribute* attr)
 113 {
 114     SVGParsingError parseError = NoError;
 115
 116     if (!isSupportedAttribute(attr->name()))
 117         SVGStyledElement::parseMappedAttribute(attr);
 118     else if (attr->name() == SVGNames::patternUnitsAttr) {
 119         SVGUnitTypes::SVGUnitType propertyValue = SVGPropertyTraits<SVGUnitTypes::SVGUnitType>::fromString(attr->value());
 120         if (propertyValue > 0)
 121             setPatternUnitsBaseValue(propertyValue);
 122         return;
 123     } else if (attr->name() == SVGNames::patternContentUnitsAttr) {
 124         SVGUnitTypes::SVGUnitType propertyValue = SVGPropertyTraits<SVGUnitTypes::SVGUnitType>::fromString(attr->value());
 125         if (propertyValue > 0)
 126             setPatternContentUnitsBaseValue(propertyValue);
 127         return;
 128     } else if (attr->name() == SVGNames::patternTransformAttr) {
 129         SVGTransformList newList;
 130         if (!SVGTransformable::parseTransformAttribute(newList, attr->value()))
 131             newList.clear();
 132
 133         detachAnimatedPatternTransformListWrappers(newList.size());
 134         setPatternTransformBaseValue(newList);
 135         return;
 136     } else if (attr->name() == SVGNames::xAttr)
 137         setXBaseValue(SVGLength::construct(LengthModeWidth, attr->value(), parseError));
 138     else if (attr->name() == SVGNames::yAttr)
 139         setYBaseValue(SVGLength::construct(LengthModeHeight, attr->value(), parseError));
 140     else if (attr->name() == SVGNames::widthAttr)
 141         setWidthBaseValue(SVGLength::construct(LengthModeWidth, attr->value(), parseError, ForbidNegativeLengths));
 142     else if (attr->name() == SVGNames::heightAttr)
 143         setHeightBaseValue(SVGLength::construct(LengthModeHeight, attr->value(), parseError, ForbidNegativeLengths));
 144     else if (SVGURIReference::parseMappedAttribute(attr)
 145              || SVGTests::parseMappedAttribute(attr)
 146              || SVGLangSpace::parseMappedAttribute(attr)
 147              || SVGExternalResourcesRequired::parseMappedAttribute(attr)
 148              || SVGFitToViewBox::parseMappedAttribute(document(), attr)) {
 149     } else
 150         ASSERT_NOT_REACHED();
 151
 152     reportAttributeParsingError(parseError, attr);
 153 }
 154
 155 void SVGPatternElement::svgAttributeChanged(const QualifiedName& attrName)
 156 {
 157     if (!isSupportedAttribute(attrName)) {
 158         SVGStyledElement::svgAttributeChanged(attrName);
 159         return;
 160     }
 161
 162     SVGElementInstance::InvalidationGuard invalidationGuard(this);
 163
 164     if (attrName == SVGNames::xAttr
 165         || attrName == SVGNames::yAttr
 166         || attrName == SVGNames::widthAttr
 167         || attrName == SVGNames::heightAttr)
 168         updateRelativeLengthsInformation();
 169
 170     if (RenderObject* object = renderer())
 171         object->setNeedsLayout(true);
 172 }
 173
 174 void SVGPatternElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
 175 {
 176     SVGStyledElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
 177
 178     if (changedByParser)
 179         return;
 180
 181     if (RenderObject* object = renderer())
 182         object->setNeedsLayout(true);
 183 }
 184
 185 RenderObject* SVGPatternElement::createRenderer(RenderArena* arena, RenderStyle*)
 186 {
 187     return new (arena) RenderSVGResourcePattern(this);
 188 }
 189
 190 void SVGPatternElement::collectPatternAttributes(PatternAttributes& attributes) const
 191 {
 192     HashSet<const SVGPatternElement*> processedPatterns;
 193
 194     const SVGPatternElement* current = this;
 195     while (current) {
 196         if (!attributes.hasX() && current->hasAttribute(SVGNames::xAttr))
 197             attributes.setX(current->x());
 198
 199         if (!attributes.hasY() && current->hasAttribute(SVGNames::yAttr))
 200             attributes.setY(current->y());
 201
 202         if (!attributes.hasWidth() && current->hasAttribute(SVGNames::widthAttr))
 203             attributes.setWidth(current->width());
 204
 205         if (!attributes.hasHeight() && current->hasAttribute(SVGNames::heightAttr))
 206             attributes.setHeight(current->height());
 207
 208         if (!attributes.hasViewBox() && current->hasAttribute(SVGNames::viewBoxAttr))
 209             attributes.setViewBox(current->viewBox());
 210
 211         if (!attributes.hasPreserveAspectRatio() && current->hasAttribute(SVGNames::preserveAspectRatioAttr))
 212             attributes.setPreserveAspectRatio(current->preserveAspectRatio());
 213
 214         if (!attributes.hasPatternUnits() && current->hasAttribute(SVGNames::patternUnitsAttr))
 215             attributes.setPatternUnits(current->patternUnits());
 216
 217         if (!attributes.hasPatternContentUnits() && current->hasAttribute(SVGNames::patternContentUnitsAttr))
 218             attributes.setPatternContentUnits(current->patternContentUnits());
 219
 220         if (!attributes.hasPatternTransform() && current->hasAttribute(SVGNames::patternTransformAttr)) {
 221             AffineTransform transform;
 222             current->patternTransform().concatenate(transform);
 223             attributes.setPatternTransform(transform);
 224         }
 225
 226         if (!attributes.hasPatternContentElement() && current->hasChildNodes())
 227             attributes.setPatternContentElement(current);
 228
 229         processedPatterns.add(current);
 230
 231         // Respect xlink:href, take attributes from referenced element
 232         Node* refNode = SVGURIReference::targetElementFromIRIString(current->href(), document());
 233         if (refNode && refNode->hasTagName(SVGNames::patternTag)) {
 234             current = static_cast<const SVGPatternElement*>(const_cast<const Node*>(refNode));
 235
 236             // Cycle detection
 237             if (processedPatterns.contains(current)) {
 238                 current = 0;
 239                 break;
 240             }
 241         } else
 242             current = 0;
 243     }
 244 }
 245
 246 bool SVGPatternElement::selfHasRelativeLengths() const
 247 {
 248     return x().isRelative()
 249         || y().isRelative()
 250         || width().isRelative()
 251         || height().isRelative();
 252 }
 253
 254 }
 255
 256 #endif // ENABLE(SVG)