WebCore/svg/SVGStyledTransformableElement.cpp

   1 /*
   2     Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
   3                   2004, 2005, 2006 Rob Buis <buis@kde.org>
   4
   5     This library is free software; you can redistribute it and/or
   6     modify it under the terms of the GNU Library General Public
   7     License as published by the Free Software Foundation; either
   8     version 2 of the License, or (at your option) any later version.
   9
  10     This library is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13     Library General Public License for more details.
  14
  15     You should have received a copy of the GNU Library General Public License
  16     along with this library; see the file COPYING.LIB.  If not, write to
  17     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  18     Boston, MA 02110-1301, USA.
  19 */
  20
  21 #include "config.h"
  22
  23 #if ENABLE(SVG)
  24 #include "SVGStyledTransformableElement.h"
  25
  26 #include "Attr.h"
  27 #include "MappedAttribute.h"
  28 #include "RenderPath.h"
  29 #include "SVGDocument.h"
  30 #include "SVGStyledElement.h"
  31 #include "SVGTransformList.h"
  32 #include "TransformationMatrix.h"
  33
  34 namespace WebCore {
  35
  36 char SVGStyledTransformableElementIdentifier[] = "SVGStyledTransformableElement";
  37
  38 SVGStyledTransformableElement::SVGStyledTransformableElement(const QualifiedName& tagName, Document* doc)
  39     : SVGStyledLocatableElement(tagName, doc)
  40     , SVGTransformable()
  41     , m_transform(this, SVGNames::transformAttr, SVGTransformList::create(SVGNames::transformAttr))
  42 {
  43 }
  44
  45 SVGStyledTransformableElement::~SVGStyledTransformableElement()
  46 {
  47 }
  48
  49 TransformationMatrix SVGStyledTransformableElement::getCTM() const
  50 {
  51     return SVGTransformable::getCTM(this);
  52 }
  53
  54 TransformationMatrix SVGStyledTransformableElement::getScreenCTM() const
  55 {
  56     return SVGTransformable::getScreenCTM(this);
  57 }
  58
  59 TransformationMatrix SVGStyledTransformableElement::animatedLocalTransform() const
  60 {
  61     return m_supplementalTransform ? transform()->concatenate().matrix() * *m_supplementalTransform : transform()->concatenate().matrix();
  62 }
  63
  64 TransformationMatrix* SVGStyledTransformableElement::supplementalTransform()
  65 {
  66     if (!m_supplementalTransform)
  67         m_supplementalTransform.set(new TransformationMatrix());
  68     return m_supplementalTransform.get();
  69 }
  70
  71 void SVGStyledTransformableElement::parseMappedAttribute(MappedAttribute* attr)
  72 {
  73     if (attr->name() == SVGNames::transformAttr) {
  74         SVGTransformList* localTransforms = transformBaseValue();
  75
  76         ExceptionCode ec = 0;
  77         localTransforms->clear(ec);
  78
  79         if (!SVGTransformable::parseTransformAttribute(localTransforms, attr->value()))
  80             localTransforms->clear(ec);
  81         else
  82             setTransformBaseValue(localTransforms);
  83     } else
  84         SVGStyledLocatableElement::parseMappedAttribute(attr);
  85 }
  86
  87 bool SVGStyledTransformableElement::isKnownAttribute(const QualifiedName& attrName)
  88 {
  89     return SVGTransformable::isKnownAttribute(attrName) ||
  90            SVGStyledLocatableElement::isKnownAttribute(attrName);
  91 }
  92
  93 SVGElement* SVGStyledTransformableElement::nearestViewportElement() const
  94 {
  95     return SVGTransformable::nearestViewportElement(this);
  96 }
  97
  98 SVGElement* SVGStyledTransformableElement::farthestViewportElement() const
  99 {
 100     return SVGTransformable::farthestViewportElement(this);
 101 }
 102
 103 FloatRect SVGStyledTransformableElement::getBBox() const
 104 {
 105     return SVGTransformable::getBBox(this);
 106 }
 107
 108 RenderObject* SVGStyledTransformableElement::createRenderer(RenderArena* arena, RenderStyle*)
 109 {
 110     // By default, any subclass is expected to do path-based drawing
 111     return new (arena) RenderPath(this);
 112 }
 113
 114 Path SVGStyledTransformableElement::toClipPath() const
 115 {
 116     Path pathData = toPathData();
 117     // FIXME: How do we know the element has done a layout?
 118     pathData.transform(animatedLocalTransform());
 119     return pathData;
 120 }
 121
 122 }
 123
 124 #endif // ENABLE(SVG)