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/Timer.h" 32 #include "platform/fonts/FontOrientation.h" 33 #include "platform/fonts/FontWidthVariant.h" 34 #include "wtf/OwnPtr.h" 35 36 namespace blink { 37 38 class Document; 39 class ResourceFetcher; 40 class FontPlatformData; 41 class SVGFontElement; 42 class FontCustomPlatformData; 43 44 class FontResource FINAL : public Resource { 45 public: 46 typedef ResourceClient ClientType; 47 48 FontResource(const ResourceRequest&); 49 virtual ~FontResource(); 50 virtual void trace(Visitor*) OVERRIDE; 51 52 virtual void load(ResourceFetcher*, const ResourceLoaderOptions&) OVERRIDE; 53 54 virtual void didAddClient(ResourceClient*) OVERRIDE; 55 56 virtual void allClientsRemoved() OVERRIDE; 57 void beginLoadIfNeeded(ResourceFetcher* dl); stillNeedsLoad()58 virtual bool stillNeedsLoad() const OVERRIDE { return m_state != LoadInitiated; } exceedsFontLoadWaitLimit()59 bool exceedsFontLoadWaitLimit() const { return m_exceedsFontLoadWaitLimit; } 60 loadScheduled()61 bool loadScheduled() const { return m_state != Unloaded; } 62 void didScheduleLoad(); 63 void didUnscheduleLoad(); 64 setCORSFailed()65 void setCORSFailed() { m_corsFailed = true; } isCORSFailed()66 bool isCORSFailed() const { return m_corsFailed; } 67 68 bool ensureCustomFontData(); 69 FontPlatformData platformDataFromCustomData(float size, bool bold, bool italic, FontOrientation = Horizontal, FontWidthVariant = RegularWidth); 70 71 #if ENABLE(SVG_FONTS) 72 bool ensureSVGFontData(); 73 SVGFontElement* getSVGFontById(const String&) const; 74 #endif 75 76 protected: 77 virtual bool isSafeToUnlock() const OVERRIDE; 78 79 private: 80 virtual void checkNotify() OVERRIDE; 81 void fontLoadWaitLimitCallback(Timer<FontResource>*); 82 83 enum State { Unloaded, LoadScheduled, LoadInitiated }; 84 85 OwnPtr<FontCustomPlatformData> m_fontData; 86 State m_state; 87 bool m_exceedsFontLoadWaitLimit; 88 bool m_corsFailed; 89 Timer<FontResource> m_fontLoadWaitLimitTimer; 90 91 #if ENABLE(SVG_FONTS) 92 RefPtrWillBeMember<Document> m_externalSVGDocument; 93 #endif 94 95 friend class MemoryCache; 96 }; 97 98 DEFINE_RESOURCE_TYPE_CASTS(Font); 99 100 class FontResourceClient : public ResourceClient { 101 public: ~FontResourceClient()102 virtual ~FontResourceClient() { } expectedType()103 static ResourceClientType expectedType() { return FontType; } resourceClientType()104 virtual ResourceClientType resourceClientType() const OVERRIDE FINAL { return expectedType(); } fontLoaded(FontResource *)105 virtual void fontLoaded(FontResource*) { } didStartFontLoad(FontResource *)106 virtual void didStartFontLoad(FontResource*) { } fontLoadWaitLimitExceeded(FontResource *)107 virtual void fontLoadWaitLimitExceeded(FontResource*) { } 108 }; 109 110 } 111 112 #endif 113