File indexing completed on 2024-05-12 11:51:55

 /*
  * Copyright (C) 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "wtf/Platform.h"
 
 #if ENABLE(SVG)
 #include "SVGResource.h"
 
 #include "RenderPath.h"
 #include "SVGElement.h"
 #include "SVGStyledElement.h"
 
 namespace WebCore
 {
 
 SVGResource::SVGResource()
 {
 }
 
 struct ResourceSet {
     ResourceSet()
     {
         for (int i = 0; i < _ResourceTypeCount; i++) {
             resources[i] = nullptr;
         }
     }
     SVGResource *resources[_ResourceTypeCount];
 };
 
 static HashMap<SVGStyledElement *, ResourceSet *> &clientMap()
 {
     static HashMap<SVGStyledElement *, ResourceSet *> map;
     return map;
 }
 
 SVGResource::~SVGResource()
 {
     int type = -1;
     HashSet<SVGStyledElement *>::iterator itr = m_clients.begin();
 
     for (; type < 0 && itr != m_clients.end(); ++itr) {
         ResourceSet *target = clientMap().get(*itr);
         if (!target) {
             continue;
         }
 
         for (int i = 0; i < _ResourceTypeCount; i++) {
             if (target->resources[i] != this) {
                 continue;
             }
             type = i;
             target->resources[i] = nullptr;
             break;
         }
     }
 
     if (type < 0) {
         return;
     }
 
     for (; itr != m_clients.end(); ++itr) {
         ResourceSet *target = clientMap().get(*itr);
         if (!target) {
             continue;
         }
 
         if (target->resources[type] == this) {
             target->resources[type] = nullptr;
         }
     }
 }
 
 void SVGResource::invalidate()
 {
     HashSet<SVGStyledElement *>::const_iterator it = m_clients.begin();
     const HashSet<SVGStyledElement *>::const_iterator end = m_clients.end();
 
     for (; it != end; ++it) {
         SVGStyledElement *cur = *it;
 
         if (cur->renderer()) {
             cur->renderer()->setNeedsLayout(true);
         }
 
         cur->invalidateResourcesInAncestorChain();
     }
 }
 
 void SVGResource::invalidateClients(HashSet<SVGStyledElement *> clients)
 {
     HashSet<SVGStyledElement *>::const_iterator it = clients.begin();
     const HashSet<SVGStyledElement *>::const_iterator end = clients.end();
 
     for (; it != end; ++it) {
         SVGStyledElement *cur = *it;
 
         if (cur->renderer()) {
             cur->renderer()->setNeedsLayout(true);
         }
 
         cur->invalidateResourcesInAncestorChain();
     }
 }
 
 void SVGResource::removeClient(SVGStyledElement *item)
 {
     HashMap<SVGStyledElement *, ResourceSet *>::iterator resourcePtr = clientMap().find(item);
     if (resourcePtr == clientMap().end()) {
         return;
     }
 
     ResourceSet *set = resourcePtr->second;
     ASSERT(set);
 
     clientMap().remove(resourcePtr);
 
     for (int i = 0; i < _ResourceTypeCount; i++)
         if (set->resources[i]) {
             set->resources[i]->m_clients.remove(item);
         }
 
     delete set;
 }
 
 void SVGResource::addClient(SVGStyledElement *item)
 {
     if (m_clients.contains(item)) {
         return;
     }
 
     m_clients.add(item);
 
     ResourceSet *target = clientMap().get(item);
     if (!target) {
         target = new ResourceSet;
     }
 
     SVGResourceType type = resourceType();
     if (SVGResource *oldResource = target->resources[type]) {
         oldResource->m_clients.remove(item);
     }
 
     target->resources[type] = this;
     clientMap().set(item, target);
 }
 
 /*TextStream& SVGResource::externalRepresentation(TextStream& ts) const
 {
     return ts;
 }*/
 
 SVGResource *getResourceById(Document *document, const AtomicString &id)
 {
     if (id.isEmpty()) {
         return nullptr;
     }
 
     Element *element = document->getElementById(id);
     SVGElement *svgElement = nullptr;
     if (element && element->isSVGElement()) {
         svgElement = static_cast<SVGElement *>(element);
     }
 
     if (svgElement && svgElement->isStyled()) {
         return static_cast<SVGStyledElement *>(svgElement)->canvasResource();
     }
 
     return nullptr;
 }
 
 /*TextStream& operator<<(TextStream& ts, const SVGResource& r)
 {
     return r.externalRepresentation(ts);
 }*/
 
 }
 
 #endif