1 /*
2 * Copyright (C) Research In Motion Limited 2010. All rights reserved.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB. If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 */
19
20 #include "config.h"
21
22 #if ENABLE(SVG)
23 #include "RenderSVGShadowTreeRootContainer.h"
24
25 #include "MouseEvent.h"
26 #include "SVGShadowTreeElements.h"
27 #include "SVGUseElement.h"
28
29 namespace WebCore {
30
RenderSVGShadowTreeRootContainer(SVGUseElement * node)31 RenderSVGShadowTreeRootContainer::RenderSVGShadowTreeRootContainer(SVGUseElement* node)
32 : RenderSVGTransformableContainer(node)
33 , m_recreateTree(false)
34 {
35 }
36
~RenderSVGShadowTreeRootContainer()37 RenderSVGShadowTreeRootContainer::~RenderSVGShadowTreeRootContainer()
38 {
39 if (m_shadowRoot)
40 m_shadowRoot->clearSVGShadowHost();
41 }
42
updateStyle(Node::StyleChange change)43 void RenderSVGShadowTreeRootContainer::updateStyle(Node::StyleChange change)
44 {
45 if (m_shadowRoot && m_shadowRoot->attached())
46 m_shadowRoot->recalcStyle(change);
47 }
48
updateFromElement()49 void RenderSVGShadowTreeRootContainer::updateFromElement()
50 {
51 bool hadExistingTree = m_shadowRoot;
52
53 SVGUseElement* useElement = static_cast<SVGUseElement*>(node());
54 if (!m_shadowRoot) {
55 ASSERT(!m_recreateTree);
56 m_shadowRoot = SVGShadowTreeRootElement::create(document(), useElement);
57 useElement->buildPendingResource();
58 }
59
60 ASSERT(m_shadowRoot->svgShadowHost() == useElement);
61
62 bool shouldRecreateTree = m_recreateTree;
63 if (m_recreateTree) {
64 ASSERT(hadExistingTree);
65
66 if (m_shadowRoot->attached())
67 m_shadowRoot->detach();
68
69 m_shadowRoot->removeAllChildren();
70 m_recreateTree = false;
71 }
72
73 // Only rebuild the shadow tree, if we a) never had a tree or b) we were specifically asked to do so
74 // If the use element is a pending resource, and a) or b) is true, do nothing, and wait for the use
75 // element to be asked to buildPendingResource(), this will call us again, with m_recreateTrue=true.
76 if ((shouldRecreateTree || !hadExistingTree) && !useElement->hasPendingResources()) {
77 useElement->buildShadowAndInstanceTree(m_shadowRoot.get());
78
79 // Attach shadow root element
80 m_shadowRoot->attachElement(style(), renderArena());
81
82 // Attach subtree, as if it was a regular non-shadow tree
83 for (Node* child = m_shadowRoot->firstChild(); child; child = child->nextSibling())
84 child->attach();
85 }
86
87 ASSERT(!m_recreateTree);
88 RenderSVGTransformableContainer::updateFromElement();
89 }
90
styleDidChange(StyleDifference diff,const RenderStyle * oldStyle)91 void RenderSVGShadowTreeRootContainer::styleDidChange(StyleDifference diff, const RenderStyle* oldStyle)
92 {
93 RenderSVGTransformableContainer::styleDidChange(diff, oldStyle);
94
95 if (RenderObject* shadowRootRenderer = m_shadowRoot ? m_shadowRoot->renderer() : 0)
96 shadowRootRenderer->setStyle(style());
97 }
98
rootElement() const99 Node* RenderSVGShadowTreeRootContainer::rootElement() const
100 {
101 return m_shadowRoot.get();
102 }
103
104 }
105
106 #endif
107