Home | History | Annotate | Download | only in fetch 
      1 /*
      2  * Copyright (C) 2007, 2008 Apple Inc. All rights reserved.
      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 #ifndef FontResource_h
     27 #define FontResource_h
     28 
     29 #include "core/fetch/ResourceClient.h"
     30 #include "core/fetch/ResourcePtr.h"
     31 #include "platform/fonts/FontOrientation.h"
     32 #include "platform/fonts/FontWidthVariant.h"
     33 #include "wtf/OwnPtr.h"
     34 
     35 namespace WebCore {
     36 
     37 class ResourceFetcher;
     38 class FontPlatformData;
     39 class SVGDocument;
     40 class SVGFontElement;
     41 class FontCustomPlatformData;
     42 
     43 class FontResource : public Resource {
     44 public:
     45     typedef ResourceClient ClientType;
     46 
     47     FontResource(const ResourceRequest&);
     48     virtual ~FontResource();
     49 
     50     virtual void load(ResourceFetcher*, const ResourceLoaderOptions&);
     51 
     52     virtual void didAddClient(ResourceClient*);
     53 
     54     virtual void allClientsRemoved();
     55     void beginLoadIfNeeded(ResourceFetcher* dl);
     56     bool stillNeedsLoad() const { return !m_loadInitiated; }
     57 
     58     bool ensureCustomFontData();
     59     FontPlatformData platformDataFromCustomData(float size, bool bold, bool italic, FontOrientation = Horizontal, FontWidthVariant = RegularWidth);
     60 
     61 #if ENABLE(SVG_FONTS)
     62     bool ensureSVGFontData();
     63     SVGFontElement* getSVGFontById(const String&) const;
     64 #endif
     65 
     66 private:
     67     virtual void checkNotify();
     68     OwnPtr<FontCustomPlatformData> m_fontData;
     69     bool m_loadInitiated;
     70 
     71 #if ENABLE(SVG_FONTS)
     72     RefPtr<WebCore::SVGDocument> m_externalSVGDocument;
     73 #endif
     74 
     75     friend class MemoryCache;
     76 };
     77 
     78 DEFINE_RESOURCE_TYPE_CASTS(Font);
     79 
     80 class FontResourceClient : public ResourceClient {
     81 public:
     82     virtual ~FontResourceClient() { }
     83     static ResourceClientType expectedType() { return FontType; }
     84     virtual ResourceClientType resourceClientType() const { return expectedType(); }
     85     virtual void fontLoaded(FontResource*) { }
     86     virtual void didStartFontLoad(FontResource*) { }
     87 };
     88 
     89 }
     90 
     91 #endif
     92