Move the SVG container code from rendering/svg to layout/svg.

Source/core/rendering/svg/RenderSVGTransformableContainer.cpp

-/*
- * Copyright (C) 2004, 2005 Nikolas Zimmermann <zimmermann@kde.org>
- * Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
- * Copyright (C) 2009 Google, Inc.
- *
- * 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"
-
-#include "core/rendering/svg/RenderSVGTransformableContainer.h"
-
-#include "core/layout/svg/SVGLayoutSupport.h"
-#include "core/svg/SVGGElement.h"
-#include "core/svg/SVGGraphicsElement.h"
-#include "core/svg/SVGUseElement.h"
-
-namespace blink {
-
-RenderSVGTransformableContainer::RenderSVGTransformableContainer(SVGGraphicsElement* node)
-    : LayoutSVGContainer(node)
-    , m_needsTransformUpdate(true)
-    , m_didTransformToRootUpdate(false)
-{
-}
-
-static bool hasValidPredecessor(const Node* node)
-{
-    ASSERT(node);
-    for (node = node->previousSibling(); node; node = node->previousSibling()) {
-        if (node->isSVGElement() && toSVGElement(node)->isValid())
-            return true;
-    }
-    return false;
-}
-
-bool RenderSVGTransformableContainer::isChildAllowed(LayoutObject* child, const LayoutStyle& style) const
-{
-    ASSERT(element());
-    if (isSVGSwitchElement(*element())) {
-        Node* node = child->node();
-        // Reject non-SVG/non-valid elements.
-        if (!node->isSVGElement() || !toSVGElement(node)->isValid())
-            return false;
-        // Reject this child if it isn't the first valid node.
-        if (hasValidPredecessor(node))
-            return false;
-    } else if (isSVGAElement(*element())) {
-        // http://www.w3.org/2003/01/REC-SVG11-20030114-errata#linking-text-environment
-        // The 'a' element may contain any element that its parent may contain, except itself.
-        if (isSVGAElement(*child->node()))
-            return false;
-        if (parent() && parent()->isSVG())
-            return parent()->isChildAllowed(child, style);
-    }
-    return LayoutSVGContainer::isChildAllowed(child, style);
-}
-
-bool RenderSVGTransformableContainer::calculateLocalTransform()
-{
-    SVGGraphicsElement* element = toSVGGraphicsElement(this->element());
-    ASSERT(element);
-
-    // If we're either the renderer for a <use> element, or for any <g> element inside the shadow
-    // tree, that was created during the use/symbol/svg expansion in SVGUseElement. These containers
-    // need to respect the translations induced by their corresponding use elements x/y attributes.
-    SVGUseElement* useElement = 0;
-    if (isSVGUseElement(*element)) {
-        useElement = toSVGUseElement(element);
-    } else if (isSVGGElement(*element) && toSVGGElement(element)->inUseShadowTree()) {
-        SVGElement* correspondingElement = element->correspondingElement();
-        if (isSVGUseElement(correspondingElement))
-            useElement = toSVGUseElement(correspondingElement);
-    }
-
-    if (useElement) {
-        SVGLengthContext lengthContext(useElement);
-        FloatSize translation(
-            useElement->x()->currentValue()->value(lengthContext),
-            useElement->y()->currentValue()->value(lengthContext));
-        if (translation != m_lastTranslation)
-            m_needsTransformUpdate = true;
-        m_lastTranslation = translation;
-    }
-
-    m_didTransformToRootUpdate = m_needsTransformUpdate || SVGLayoutSupport::transformToRootChanged(parent());
-    if (!m_needsTransformUpdate)
-        return false;
-
-    m_localTransform = element->calculateAnimatedLocalTransform();
-    m_localTransform.translate(m_lastTranslation.width(), m_lastTranslation.height());
-    m_needsTransformUpdate = false;
-    return true;
-}
-
-}