WebCore/svg/graphics/SVGResource.cpp

   1 /*
   2  * Copyright (C) 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "config.h"
  27
  28 #if ENABLE(SVG)
  29 #include "SVGResource.h"
  30
  31 #include "RenderPath.h"
  32 #include "SVGElement.h"
  33 #include "SVGStyledElement.h"
  34
  35 namespace WebCore {
  36
  37 SVGResource::SVGResource()
  38 {
  39 }
  40
  41 struct ResourceSet {
  42     ResourceSet()
  43     {
  44         for (int i = 0; i < _ResourceTypeCount; i++)
  45             resources[i] = 0;
  46     }
  47     SVGResource* resources[_ResourceTypeCount];
  48 };
  49
  50 static HashMap<SVGStyledElement*, ResourceSet*>& clientMap() {
  51     static HashMap<SVGStyledElement*, ResourceSet*> map;
  52     return map;
  53 }
  54
  55 SVGResource::~SVGResource()
  56 {
  57     int type = -1;
  58     HashSet<SVGStyledElement*>::iterator itr = m_clients.begin();
  59
  60     for (; type < 0 && itr != m_clients.end(); ++itr) {
  61         ResourceSet* target = clientMap().get(*itr);
  62         if (!target)
  63             continue;
  64
  65         for (int i = 0; i < _ResourceTypeCount; i++) {
  66             if (target->resources[i] != this)
  67                 continue;
  68             type = i;
  69             target->resources[i] = 0;
  70             break;
  71         }
  72     }
  73
  74     if (type < 0)
  75         return;
  76
  77     for (; itr != m_clients.end(); ++itr) {
  78         ResourceSet* target = clientMap().get(*itr);
  79         if (!target)
  80             continue;
  81
  82         if (target->resources[type] == this)
  83             target->resources[type] = 0;
  84     }
  85 }
  86
  87 void SVGResource::invalidate()
  88 {
  89     HashSet<SVGStyledElement*>::const_iterator it = m_clients.begin();
  90     const HashSet<SVGStyledElement*>::const_iterator end = m_clients.end();
  91
  92     for (; it != end; ++it) {
  93         SVGStyledElement* cur = *it;
  94
  95         if (cur->renderer())
  96             cur->renderer()->setNeedsLayout(true);
  97
  98         cur->invalidateResourcesInAncestorChain();
  99     }
 100 }
 101
 102 void SVGResource::invalidateClients(HashSet<SVGStyledElement*> clients)
 103 {
 104     HashSet<SVGStyledElement*>::const_iterator it = clients.begin();
 105     const HashSet<SVGStyledElement*>::const_iterator end = clients.end();
 106
 107     for (; it != end; ++it) {
 108         SVGStyledElement* cur = *it;
 109
 110         if (cur->renderer())
 111             cur->renderer()->setNeedsLayout(true);
 112
 113         cur->invalidateResourcesInAncestorChain();
 114     }
 115 }
 116
 117 void SVGResource::removeClient(SVGStyledElement* item)
 118 {
 119     HashMap<SVGStyledElement*, ResourceSet*>::iterator resourcePtr = clientMap().find(item);
 120     if (resourcePtr == clientMap().end())
 121         return;
 122
 123     ResourceSet* set = resourcePtr->second;
 124     ASSERT(set);
 125
 126     clientMap().remove(resourcePtr);
 127
 128     for (int i = 0; i < _ResourceTypeCount; i++)
 129         if (set->resources[i])
 130             set->resources[i]->m_clients.remove(item);
 131
 132     delete set;
 133 }
 134
 135 void SVGResource::addClient(SVGStyledElement* item)
 136 {
 137     if (m_clients.contains(item))
 138         return;
 139
 140     m_clients.add(item);
 141
 142     ResourceSet* target = clientMap().get(item);
 143     if (!target)
 144         target = new ResourceSet;
 145
 146     SVGResourceType type = resourceType();
 147     if (SVGResource* oldResource = target->resources[type])
 148         oldResource->m_clients.remove(item);
 149
 150     target->resources[type] = this;
 151     clientMap().set(item, target);
 152 }
 153
 154 TextStream& SVGResource::externalRepresentation(TextStream& ts) const
 155 {
 156     return ts;
 157 }
 158
 159 SVGResource* getResourceById(Document* document, const AtomicString& id)
 160 {
 161     if (id.isEmpty())
 162         return 0;
 163
 164     Element* element = document->getElementById(id);
 165     SVGElement* svgElement = 0;
 166     if (element && element->isSVGElement())
 167         svgElement = static_cast<SVGElement*>(element);
 168
 169     if (svgElement && svgElement->isStyled())
 170         return static_cast<SVGStyledElement*>(svgElement)->canvasResource();
 171
 172     return 0;
 173 }
 174
 175 TextStream& operator<<(TextStream& ts, const SVGResource& r)
 176 {
 177     return r.externalRepresentation(ts);
 178 }
 179
 180 }
 181
 182 #endif