--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/rendering/RenderSVGShadowTreeRootContainer.cpp	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,106 @@
+/*
+    Copyright (C) Research In Motion Limited 2010. All rights reserved.
+
+    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
+    aint 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 "RenderSVGShadowTreeRootContainer.h"
+
+#include "MouseEvent.h"
+#include "SVGShadowTreeElements.h"
+#include "SVGUseElement.h"
+
+namespace WebCore {
+
+RenderSVGShadowTreeRootContainer::RenderSVGShadowTreeRootContainer(SVGUseElement* node)
+    : RenderSVGTransformableContainer(node)
+    , m_recreateTree(false)
+{
+}
+
+RenderSVGShadowTreeRootContainer::~RenderSVGShadowTreeRootContainer()
+{
+    if (m_shadowRoot && m_shadowRoot->attached())
+        m_shadowRoot->detach();
+}
+
+void RenderSVGShadowTreeRootContainer::updateStyle(Node::StyleChange change)
+{
+    if (m_shadowRoot && m_shadowRoot->attached())
+        m_shadowRoot->recalcStyle(change);
+}
+
+void RenderSVGShadowTreeRootContainer::updateFromElement()
+{
+    bool hadExistingTree = m_shadowRoot;
+
+    SVGUseElement* useElement = static_cast<SVGUseElement*>(node());
+    if (!m_shadowRoot) {
+        ASSERT(!m_recreateTree);
+        m_shadowRoot = new SVGShadowTreeRootElement(document(), useElement);
+        useElement->buildPendingResource();
+    }
+
+    ASSERT(m_shadowRoot->shadowParentNode() == useElement);
+
+    bool shouldRecreateTree = m_recreateTree;
+    if (m_recreateTree) {
+        ASSERT(hadExistingTree);
+
+        if (m_shadowRoot->attached())
+            m_shadowRoot->detach();
+
+        m_shadowRoot->removeAllChildren();
+        m_recreateTree = false;
+    }
+
+    // Only rebuild the shadow tree, if we a) never had a tree or b) we were specifically asked to do so
+    // If the use element is a pending resource, and a) or b) is true, do nothing, and wait for the use
+    // element to be asked to buildPendingResource(), this will call us again, with m_recreateTrue=true.
+    if ((shouldRecreateTree || !hadExistingTree) && !useElement->isPendingResource()) {
+        useElement->buildShadowAndInstanceTree(m_shadowRoot.get());
+
+        // Attach shadow root element
+        m_shadowRoot->attachElement(style(), renderArena());
+
+        // Attach subtree, as if it was a regular non-shadow tree
+        for (Node* child = m_shadowRoot->firstChild(); child; child = child->nextSibling())
+            child->attach();
+    }
+
+    ASSERT(!m_recreateTree);
+    RenderSVGTransformableContainer::updateFromElement();
+}
+
+void RenderSVGShadowTreeRootContainer::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
+{
+    RenderSVGTransformableContainer::styleDidChange(diff, oldStyle);
+
+    if (RenderObject* shadowRootRenderer = m_shadowRoot ? m_shadowRoot->renderer() : 0)
+        shadowRootRenderer->setStyle(style());
+}
+
+Node* RenderSVGShadowTreeRootContainer::rootElement() const
+{
+    return m_shadowRoot.get();
+}
+
+}
+
+#endif