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 file is part of the KDE project
   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     along 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 "SVGStyledTransformableElement.h"
  27
  28 #include "Attr.h"
  29 #include "RegularExpression.h"
  30 #include "RenderPath.h"
  31 #include "SVGDocument.h"
  32 #include "AffineTransform.h"
  33 #include "SVGStyledElement.h"
  34 #include "SVGTransformList.h"
  35
  36 namespace WebCore {
  37
  38 char SVGStyledTransformableElementIdentifier[] = "SVGStyledTransformableElement";
  39
  40 SVGStyledTransformableElement::SVGStyledTransformableElement(const QualifiedName& tagName, Document* doc)
  41     : SVGStyledLocatableElement(tagName, doc)
  42     , SVGTransformable()
  43     , m_transform(this, SVGNames::transformAttr, SVGTransformList::create(SVGNames::transformAttr))
  44 {
  45 }
  46
  47 SVGStyledTransformableElement::~SVGStyledTransformableElement()
  48 {
  49 }
  50
  51 AffineTransform SVGStyledTransformableElement::getCTM() const
  52 {
  53     return SVGTransformable::getCTM(this);
  54 }
  55
  56 AffineTransform SVGStyledTransformableElement::getScreenCTM() const
  57 {
  58     return SVGTransformable::getScreenCTM(this);
  59 }
  60
  61 AffineTransform SVGStyledTransformableElement::animatedLocalTransform() const
  62 {
  63     return m_supplementalTransform ? transform()->concatenate().matrix() * *m_supplementalTransform : transform()->concatenate().matrix();
  64 }
  65
  66 AffineTransform* SVGStyledTransformableElement::supplementalTransform()
  67 {
  68     if (!m_supplementalTransform)
  69         m_supplementalTransform.set(new AffineTransform());
  70     return m_supplementalTransform.get();
  71 }
  72
  73 void SVGStyledTransformableElement::parseMappedAttribute(MappedAttribute* attr)
  74 {
  75     if (attr->name() == SVGNames::transformAttr) {
  76         SVGTransformList* localTransforms = transformBaseValue();
  77
  78         ExceptionCode ec = 0;
  79         localTransforms->clear(ec);
  80
  81         if (!SVGTransformable::parseTransformAttribute(localTransforms, attr->value()))
  82             localTransforms->clear(ec);
  83         else
  84             setTransformBaseValue(localTransforms);
  85     } else
  86         SVGStyledLocatableElement::parseMappedAttribute(attr);
  87 }
  88
  89 bool SVGStyledTransformableElement::isKnownAttribute(const QualifiedName& attrName)
  90 {
  91     return SVGTransformable::isKnownAttribute(attrName) ||
  92            SVGStyledLocatableElement::isKnownAttribute(attrName);
  93 }
  94
  95 SVGElement* SVGStyledTransformableElement::nearestViewportElement() const
  96 {
  97     return SVGTransformable::nearestViewportElement(this);
  98 }
  99
 100 SVGElement* SVGStyledTransformableElement::farthestViewportElement() const
 101 {
 102     return SVGTransformable::farthestViewportElement(this);
 103 }
 104
 105 FloatRect SVGStyledTransformableElement::getBBox() const
 106 {
 107     return SVGTransformable::getBBox(this);
 108 }
 109
 110 RenderObject* SVGStyledTransformableElement::createRenderer(RenderArena* arena, RenderStyle* style)
 111 {
 112     // By default, any subclass is expected to do path-based drawing
 113     return new (arena) RenderPath(style, this);
 114 }
 115
 116 Path SVGStyledTransformableElement::toClipPath() const
 117 {
 118     Path pathData = toPathData();
 119     // FIXME: How do we know the element has done a layout?
 120     pathData.transform(animatedLocalTransform());
 121     return pathData;
 122 }
 123
 124 }
 125
 126 #endif // ENABLE(SVG)