1 files changed, 322 insertions, 0 deletions
diff --git a/src/3rdparty/webkit/WebCore/svg/SVGPatternElement.cpp b/src/3rdparty/webkit/WebCore/svg/SVGPatternElement.cpp
new file mode 100644
index 0000000..5d21b94
--- /dev/null
+++ b/src/3rdparty/webkit/WebCore/svg/SVGPatternElement.cpp
@@ -0,0 +1,322 @@
+/*
+    Copyright (C) 2004, 2005, 2006, 2007, 2008 Nikolas Zimmermann <zimmermann@kde.org>
+                  2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
+
+    This file is part of the KDE project
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public License
+    along with this library; see the file COPYING.LIB.  If not, write to
+    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+    Boston, MA 02110-1301, USA.
+*/
+
+#include "config.h"
+
+#if ENABLE(SVG)
+#include "SVGPatternElement.h"
+
+#include "TransformationMatrix.h"
+#include "Document.h"
+#include "FloatConversion.h"
+#include "GraphicsContext.h"
+#include "ImageBuffer.h"
+#include "PatternAttributes.h"
+#include "RenderSVGContainer.h"
+#include "SVGLength.h"
+#include "SVGNames.h"
+#include "SVGPaintServerPattern.h"
+#include "SVGRenderSupport.h"
+#include "SVGStyledTransformableElement.h"
+#include "SVGSVGElement.h"
+#include "SVGTransformList.h"
+#include "SVGTransformable.h"
+#include "SVGUnitTypes.h"
+
+#include <math.h>
+#include <wtf/OwnPtr.h>
+#include <wtf/MathExtras.h>
+
+using namespace std;
+
+namespace WebCore {
+
+SVGPatternElement::SVGPatternElement(const QualifiedName& tagName, Document* doc)
+    : SVGStyledElement(tagName, doc)
+    , SVGURIReference()
+    , SVGTests()
+    , SVGLangSpace()
+    , SVGExternalResourcesRequired()
+    , SVGFitToViewBox()
+    , m_x(this, SVGNames::xAttr, LengthModeWidth)
+    , m_y(this, SVGNames::yAttr, LengthModeHeight)
+    , m_width(this, SVGNames::widthAttr, LengthModeWidth)
+    , m_height(this, SVGNames::heightAttr, LengthModeHeight)
+    , m_patternUnits(this, SVGNames::patternUnitsAttr, SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX)
+    , m_patternContentUnits(this, SVGNames::patternContentUnitsAttr, SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE)
+    , m_patternTransform(this, SVGNames::patternTransformAttr, SVGTransformList::create(SVGNames::patternTransformAttr))
+{
+}
+
+SVGPatternElement::~SVGPatternElement()
+{
+}
+
+void SVGPatternElement::parseMappedAttribute(MappedAttribute* attr)
+{
+    if (attr->name() == SVGNames::patternUnitsAttr) {
+        if (attr->value() == "userSpaceOnUse")
+            setPatternUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE);
+        else if (attr->value() == "objectBoundingBox")
+            setPatternUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX);
+    } else if (attr->name() == SVGNames::patternContentUnitsAttr) {
+        if (attr->value() == "userSpaceOnUse")
+            setPatternContentUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE);
+        else if (attr->value() == "objectBoundingBox")
+            setPatternContentUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX);
+    } else if (attr->name() == SVGNames::patternTransformAttr) {
+        SVGTransformList* patternTransforms = patternTransformBaseValue();
+        if (!SVGTransformable::parseTransformAttribute(patternTransforms, attr->value())) {
+            ExceptionCode ec = 0;
+            patternTransforms->clear(ec);
+        }
+    } else if (attr->name() == SVGNames::xAttr)
+        setXBaseValue(SVGLength(LengthModeWidth, attr->value()));
+    else if (attr->name() == SVGNames::yAttr)
+        setYBaseValue(SVGLength(LengthModeHeight, attr->value()));
+    else if (attr->name() == SVGNames::widthAttr) {
+        setWidthBaseValue(SVGLength(LengthModeWidth, attr->value()));
+        if (widthBaseValue().value(this) < 0.0)
+            document()->accessSVGExtensions()->reportError("A negative value for pattern attribute <width> is not allowed");
+    } else if (attr->name() == SVGNames::heightAttr) {
+        setHeightBaseValue(SVGLength(LengthModeHeight, attr->value()));
+        if (heightBaseValue().value(this) < 0.0)
+            document()->accessSVGExtensions()->reportError("A negative value for pattern attribute <height> is not allowed");
+    } else {
+        if (SVGURIReference::parseMappedAttribute(attr))
+            return;
+        if (SVGTests::parseMappedAttribute(attr))
+            return;
+        if (SVGLangSpace::parseMappedAttribute(attr))
+            return;
+        if (SVGExternalResourcesRequired::parseMappedAttribute(attr))
+            return;
+        if (SVGFitToViewBox::parseMappedAttribute(attr))
+            return;
+
+        SVGStyledElement::parseMappedAttribute(attr);
+    }
+}
+
+void SVGPatternElement::svgAttributeChanged(const QualifiedName& attrName)
+{
+    SVGStyledElement::svgAttributeChanged(attrName);
+
+    if (!m_resource)
+        return;
+
+    if (attrName == SVGNames::patternUnitsAttr || attrName == SVGNames::patternContentUnitsAttr ||
+        attrName == SVGNames::patternTransformAttr || attrName == SVGNames::xAttr || attrName == SVGNames::yAttr ||
+        attrName == SVGNames::widthAttr || attrName == SVGNames::heightAttr ||
+        SVGURIReference::isKnownAttribute(attrName) ||
+        SVGTests::isKnownAttribute(attrName) || 
+        SVGLangSpace::isKnownAttribute(attrName) ||
+        SVGExternalResourcesRequired::isKnownAttribute(attrName) ||
+        SVGFitToViewBox::isKnownAttribute(attrName) ||
+        SVGStyledElement::isKnownAttribute(attrName))
+        m_resource->invalidate();
+}
+
+void SVGPatternElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta)
+{
+    SVGStyledElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta);
+
+    if (!m_resource)
+        return;
+
+    m_resource->invalidate();
+}
+
+void SVGPatternElement::buildPattern(const FloatRect& targetRect) const
+{
+    PatternAttributes attributes = collectPatternProperties();
+
+    // If we didn't find any pattern content, ignore the request.
+    if (!attributes.patternContentElement() || !renderer() || !renderer()->style())
+        return;
+
+    FloatRect patternBoundaries; 
+    FloatRect patternContentBoundaries;
+
+    // Determine specified pattern size
+    if (attributes.boundingBoxMode())
+        patternBoundaries = FloatRect(attributes.x().valueAsPercentage() * targetRect.width(),
+                                      attributes.y().valueAsPercentage() * targetRect.height(),
+                                      attributes.width().valueAsPercentage() * targetRect.width(),
+                                      attributes.height().valueAsPercentage() * targetRect.height());
+    else
+        patternBoundaries = FloatRect(attributes.x().value(this),
+                                      attributes.y().value(this),
+                                      attributes.width().value(this),
+                                      attributes.height().value(this));
+
+    // Clip pattern boundaries to target boundaries
+    if (patternBoundaries.width() > targetRect.width())
+        patternBoundaries.setWidth(targetRect.width());
+
+    if (patternBoundaries.height() > targetRect.height())
+        patternBoundaries.setHeight(targetRect.height());
+
+    IntSize patternSize(patternBoundaries.width(), patternBoundaries.height());
+    clampImageBufferSizeToViewport(document()->renderer(), patternSize);
+
+    if (patternSize.width() < static_cast<int>(patternBoundaries.width()))
+        patternBoundaries.setWidth(patternSize.width());
+
+    if (patternSize.height() < static_cast<int>(patternBoundaries.height()))
+        patternBoundaries.setHeight(patternSize.height());
+
+    // Eventually calculate the pattern content boundaries (only needed with overflow="visible").
+    RenderStyle* style = renderer()->style();
+    if (style->overflowX() == OVISIBLE && style->overflowY() == OVISIBLE) {
+        for (Node* n = attributes.patternContentElement()->firstChild(); n; n = n->nextSibling()) {
+            if (!n->isSVGElement() || !static_cast<SVGElement*>(n)->isStyledTransformable() || !n->renderer())
+                continue;
+            patternContentBoundaries.unite(n->renderer()->relativeBBox(true));
+        }
+    }
+
+    TransformationMatrix viewBoxCTM = viewBoxToViewTransform(patternBoundaries.width(), patternBoundaries.height()); 
+    FloatRect patternBoundariesIncludingOverflow = patternBoundaries;
+
+    // Apply objectBoundingBoxMode fixup for patternContentUnits, if viewBox is not set.
+    if (!patternContentBoundaries.isEmpty()) {
+        if (!viewBoxCTM.isIdentity())
+            patternContentBoundaries = viewBoxCTM.mapRect(patternContentBoundaries);
+        else if (attributes.boundingBoxModeContent())
+            patternContentBoundaries = FloatRect(patternContentBoundaries.x() * targetRect.width(),
+                                                 patternContentBoundaries.y() * targetRect.height(),
+                                                 patternContentBoundaries.width() * targetRect.width(),
+                                                 patternContentBoundaries.height() * targetRect.height());
+
+        patternBoundariesIncludingOverflow.unite(patternContentBoundaries);
+    }
+
+    IntSize imageSize(lroundf(patternBoundariesIncludingOverflow.width()), lroundf(patternBoundariesIncludingOverflow.height()));
+    clampImageBufferSizeToViewport(document()->renderer(), imageSize);
+
+    auto_ptr<ImageBuffer> patternImage = ImageBuffer::create(imageSize, false);
+
+    if (!patternImage.get())
+        return;
+
+    GraphicsContext* context = patternImage->context();
+    ASSERT(context);
+
+    context->save();
+
+    // Move to pattern start origin
+    if (patternBoundariesIncludingOverflow.location() != patternBoundaries.location()) {
+        context->translate(patternBoundaries.x() - patternBoundariesIncludingOverflow.x(),
+                           patternBoundaries.y() - patternBoundariesIncludingOverflow.y());
+
+        patternBoundaries.setLocation(patternBoundariesIncludingOverflow.location());
+    }
+
+    // Process viewBox or boundingBoxModeContent correction
+    if (!viewBoxCTM.isIdentity())
+        context->concatCTM(viewBoxCTM);
+    else if (attributes.boundingBoxModeContent()) {
+        context->translate(targetRect.x(), targetRect.y());
+        context->scale(FloatSize(targetRect.width(), targetRect.height()));
+    }
+
+    // Render subtree into ImageBuffer
+    for (Node* n = attributes.patternContentElement()->firstChild(); n; n = n->nextSibling()) {
+        if (!n->isSVGElement() || !static_cast<SVGElement*>(n)->isStyled() || !n->renderer())
+            continue;
+        renderSubtreeToImage(patternImage.get(), n->renderer());
+    }
+
+    context->restore();
+
+    m_resource->setPatternTransform(attributes.patternTransform());
+    m_resource->setPatternBoundaries(patternBoundaries); 
+    m_resource->setTile(patternImage);
+}
+
+RenderObject* SVGPatternElement::createRenderer(RenderArena* arena, RenderStyle*)
+{
+    RenderSVGContainer* patternContainer = new (arena) RenderSVGContainer(this);
+    patternContainer->setDrawsContents(false);
+    return patternContainer;
+}
+
+SVGResource* SVGPatternElement::canvasResource()
+{
+    if (!m_resource)
+        m_resource = SVGPaintServerPattern::create(this);
+
+    return m_resource.get();
+}
+
+PatternAttributes SVGPatternElement::collectPatternProperties() const
+{
+    PatternAttributes attributes;
+    HashSet<const SVGPatternElement*> processedPatterns;
+
+    const SVGPatternElement* current = this;
+    while (current) {
+        if (!attributes.hasX() && current->hasAttribute(SVGNames::xAttr))
+            attributes.setX(current->x());
+
+        if (!attributes.hasY() && current->hasAttribute(SVGNames::yAttr))
+            attributes.setY(current->y());
+
+        if (!attributes.hasWidth() && current->hasAttribute(SVGNames::widthAttr))
+            attributes.setWidth(current->width());
+
+        if (!attributes.hasHeight() && current->hasAttribute(SVGNames::heightAttr))
+            attributes.setHeight(current->height());
+
+        if (!attributes.hasBoundingBoxMode() && current->hasAttribute(SVGNames::patternUnitsAttr))
+            attributes.setBoundingBoxMode(current->patternUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX);
+
+        if (!attributes.hasBoundingBoxModeContent() && current->hasAttribute(SVGNames::patternContentUnitsAttr))
+            attributes.setBoundingBoxModeContent(current->patternContentUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX);
+
+        if (!attributes.hasPatternTransform() && current->hasAttribute(SVGNames::patternTransformAttr))
+            attributes.setPatternTransform(current->patternTransform()->consolidate().matrix());
+
+        if (!attributes.hasPatternContentElement() && current->hasChildNodes())
+            attributes.setPatternContentElement(current);
+
+        processedPatterns.add(current);
+
+        // Respect xlink:href, take attributes from referenced element
+        Node* refNode = ownerDocument()->getElementById(SVGURIReference::getTarget(current->href()));
+        if (refNode && refNode->hasTagName(SVGNames::patternTag)) {
+            current = static_cast<const SVGPatternElement*>(const_cast<const Node*>(refNode));
+
+            // Cycle detection
+            if (processedPatterns.contains(current))
+                return PatternAttributes();
+        } else
+            current = 0;
+    }
+
+    return attributes;
+}
+
+}
+
+#endif // ENABLE(SVG)