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     aint 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 

    31 RenderSVGShadowTreeRootContainer::RenderSVGShadowTreeRootContainer(SVGUseElement* node)

    32     : RenderSVGTransformableContainer(node)

    33     , m_recreateTree(false)

    34 {

    35 }

    36 

    37 RenderSVGShadowTreeRootContainer::~RenderSVGShadowTreeRootContainer()

    38 {

    39     if (m_shadowRoot && m_shadowRoot->attached())

    40         m_shadowRoot->detach();

    41 }

    42 

    43 void RenderSVGShadowTreeRootContainer::updateStyle(Node::StyleChange change)

    44 {

    45     if (m_shadowRoot && m_shadowRoot->attached())

    46         m_shadowRoot->recalcStyle(change);

    47 }

    48 

    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 = new SVGShadowTreeRootElement(document(), useElement);

    57         useElement->buildPendingResource();

    58     }

    59 

    60     ASSERT(m_shadowRoot->shadowParentNode() == 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->isPendingResource()) {

    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 

    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 

    99 Node* RenderSVGShadowTreeRootContainer::rootElement() const

   100 {

   101     return m_shadowRoot.get();

   102 }

   103 

   104 }

   105 

   106 #endif