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      1 /*
      2  * (C) 1999-2003 Lars Knoll (knoll (at) kde.org)
      3  * Copyright (C) 2004, 2005, 2006, 2008 Apple Inc. All rights reserved.
      4  *
      5  * This library is free software; you can redistribute it and/or
      6  * modify it under the terms of the GNU Library General Public
      7  * License as published by the Free Software Foundation; either
      8  * version 2 of the License, or (at your option) any later version.
      9  *
     10  * This library is distributed in the hope that it will be useful,
     11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     13  * Library General Public License for more details.
     14  *
     15  * You should have received a copy of the GNU Library General Public License
     16  * along with this library; see the file COPYING.LIB.  If not, write to
     17  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     18  * Boston, MA 02110-1301, USA.
     19  */
     20 
     21 #include "config.h"
     22 #include "CSSImageValue.h"
     23 
     24 #include "CSSValueKeywords.h"
     25 #include "Cache.h"
     26 #include "CachedImage.h"
     27 #include "DocLoader.h"
     28 #include "StyleCachedImage.h"
     29 
     30 namespace WebCore {
     31 
     32 CSSImageValue::CSSImageValue(const String& url)
     33     : CSSPrimitiveValue(url, CSS_URI)
     34     , m_accessedImage(false)
     35 {
     36 }
     37 
     38 CSSImageValue::CSSImageValue()
     39     : CSSPrimitiveValue(CSSValueNone)
     40     , m_accessedImage(true)
     41 {
     42 }
     43 
     44 CSSImageValue::~CSSImageValue()
     45 {
     46     if (m_image)
     47         m_image->cachedImage()->removeClient(this);
     48 }
     49 
     50 StyleCachedImage* CSSImageValue::cachedImage(DocLoader* loader)
     51 {
     52     return cachedImage(loader, getStringValue());
     53 }
     54 
     55 StyleCachedImage* CSSImageValue::cachedImage(DocLoader* loader, const String& url)
     56 {
     57     if (!m_accessedImage) {
     58         m_accessedImage = true;
     59 
     60         CachedImage* cachedImage = 0;
     61         if (loader)
     62             cachedImage = loader->requestImage(url);
     63         else {
     64             // FIXME: Should find a way to make these images sit in their own memory partition, since they are user agent images.
     65             cachedImage = static_cast<CachedImage*>(cache()->requestResource(0, CachedResource::ImageResource, KURL(ParsedURLString, url), String()));
     66         }
     67 
     68         if (cachedImage) {
     69             cachedImage->addClient(this);
     70             m_image = StyleCachedImage::create(cachedImage);
     71         }
     72     }
     73 
     74     return m_image.get();
     75 }
     76 
     77 String CSSImageValue::cachedImageURL()
     78 {
     79     if (!m_image)
     80         return String();
     81     return m_image->cachedImage()->url();
     82 }
     83 
     84 void CSSImageValue::clearCachedImage()
     85 {
     86     if (m_image)
     87         m_image->cachedImage()->removeClient(this);
     88     m_image = 0;
     89     m_accessedImage = false;
     90 }
     91 
     92 } // namespace WebCore
     93