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      1 /*
      2  * Copyright (C) 2006, 2008 Nikolas Zimmermann <zimmermann (at) 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 #include <wtf/HashSet.h>
     35 #include <wtf/StdLibExtras.h>
     36 
     37 namespace WebCore {
     38 
     39 typedef HashSet<SVGResource*> ResourceSet;
     40 
     41 static ResourceSet& resourceSet()
     42 {
     43     DEFINE_STATIC_LOCAL(ResourceSet, set, ());
     44     return set;
     45 }
     46 
     47 SVGResource::SVGResource()
     48 {
     49     ASSERT(!resourceSet().contains(this));
     50     resourceSet().add(this);
     51 }
     52 
     53 
     54 SVGResource::~SVGResource()
     55 {
     56     ASSERT(resourceSet().contains(this));
     57     resourceSet().remove(this);
     58 }
     59 
     60 void SVGResource::invalidate()
     61 {
     62     HashSet<SVGStyledElement*>::const_iterator it = m_clients.begin();
     63     const HashSet<SVGStyledElement*>::const_iterator end = m_clients.end();
     64 
     65     for (; it != end; ++it) {
     66         SVGStyledElement* cur = *it;
     67 
     68         if (cur->renderer())
     69             cur->renderer()->setNeedsLayout(true);
     70 
     71         cur->invalidateResourcesInAncestorChain();
     72     }
     73 }
     74 
     75 void SVGResource::invalidateClients(HashSet<SVGStyledElement*> clients)
     76 {
     77     HashSet<SVGStyledElement*>::const_iterator it = clients.begin();
     78     const HashSet<SVGStyledElement*>::const_iterator end = clients.end();
     79 
     80     for (; it != end; ++it) {
     81         SVGStyledElement* cur = *it;
     82 
     83         if (cur->renderer())
     84             cur->renderer()->setNeedsLayout(true);
     85 
     86         cur->invalidateResourcesInAncestorChain();
     87     }
     88 }
     89 
     90 void SVGResource::removeClient(SVGStyledElement* item)
     91 {
     92     ResourceSet::iterator it = resourceSet().begin();
     93     ResourceSet::iterator end = resourceSet().end();
     94 
     95     for (; it != end; ++it) {
     96         SVGResource* resource = *it;
     97         if (!resource->m_clients.contains(item))
     98             continue;
     99         resource->m_clients.remove(item);
    100     }
    101 }
    102 
    103 void SVGResource::addClient(SVGStyledElement* item)
    104 {
    105     if (m_clients.contains(item))
    106         return;
    107 
    108     m_clients.add(item);
    109 }
    110 
    111 TextStream& SVGResource::externalRepresentation(TextStream& ts) const
    112 {
    113     return ts;
    114 }
    115 
    116 SVGResource* getResourceById(Document* document, const AtomicString& id, const RenderObject* object)
    117 {
    118     if (id.isEmpty())
    119         return 0;
    120 
    121     Element* element = document->getElementById(id);
    122     SVGElement* svgElement = 0;
    123     if (element && element->isSVGElement())
    124         svgElement = static_cast<SVGElement*>(element);
    125 
    126     if (svgElement && svgElement->isStyled())
    127         return static_cast<SVGStyledElement*>(svgElement)->canvasResource(object);
    128 
    129     return 0;
    130 }
    131 
    132 TextStream& operator<<(TextStream& ts, const SVGResource& r)
    133 {
    134     return r.externalRepresentation(ts);
    135 }
    136 
    137 }
    138 
    139 #endif
    140