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 CSSFontFace_h 27 #define CSSFontFace_h 28 29 #include "core/css/CSSFontFaceSource.h" 30 #include "core/css/CSSSegmentedFontFace.h" 31 #include "core/css/FontFace.h" 32 #include "wtf/Deque.h" 33 #include "wtf/Forward.h" 34 #include "wtf/PassRefPtr.h" 35 #include "wtf/Vector.h" 36 37 namespace WebCore { 38 39 class CSSFontSelector; 40 class Document; 41 class FontDescription; 42 class RemoteFontFaceSource; 43 class SimpleFontData; 44 class StyleRuleFontFace; 45 46 class CSSFontFace FINAL : public NoBaseWillBeGarbageCollectedFinalized<CSSFontFace> { 47 public: 48 struct UnicodeRange; 49 class UnicodeRangeSet; 50 51 CSSFontFace(FontFace* fontFace, Vector<UnicodeRange>& ranges) 52 : m_ranges(ranges) 53 , m_segmentedFontFace(nullptr) 54 , m_fontFace(fontFace) 55 { 56 ASSERT(m_fontFace); 57 } 58 59 FontFace* fontFace() const { return m_fontFace; } 60 61 UnicodeRangeSet& ranges() { return m_ranges; } 62 63 void setSegmentedFontFace(CSSSegmentedFontFace*); 64 void clearSegmentedFontFace() { m_segmentedFontFace = nullptr; } 65 66 bool isValid() const { return !m_sources.isEmpty(); } 67 68 void addSource(PassOwnPtrWillBeRawPtr<CSSFontFaceSource>); 69 70 void didBeginLoad(); 71 void fontLoaded(RemoteFontFaceSource*); 72 void fontLoadWaitLimitExceeded(RemoteFontFaceSource*); 73 74 PassRefPtr<SimpleFontData> getFontData(const FontDescription&); 75 76 struct UnicodeRange { 77 UnicodeRange(UChar32 from, UChar32 to) 78 : m_from(from) 79 , m_to(to) 80 { 81 } 82 83 UChar32 from() const { return m_from; } 84 UChar32 to() const { return m_to; } 85 bool contains(UChar32 c) const { return m_from <= c && c <= m_to; } 86 bool operator<(const UnicodeRange& other) const { return m_from < other.m_from; } 87 bool operator<(UChar32 c) const { return m_to < c; } 88 89 private: 90 UChar32 m_from; 91 UChar32 m_to; 92 }; 93 94 class UnicodeRangeSet { 95 public: 96 explicit UnicodeRangeSet(const Vector<UnicodeRange>&); 97 bool contains(UChar32) const; 98 bool intersectsWith(const String&) const; 99 bool isEntireRange() const { return m_ranges.isEmpty(); } 100 size_t size() const { return m_ranges.size(); } 101 const UnicodeRange& rangeAt(size_t i) const { return m_ranges[i]; } 102 private: 103 Vector<UnicodeRange> m_ranges; // If empty, represents the whole code space. 104 }; 105 106 FontFace::LoadStatus loadStatus() const { return m_fontFace->loadStatus(); } 107 bool maybeScheduleFontLoad(const FontDescription&, UChar32); 108 void load(); 109 void load(const FontDescription&); 110 111 bool hadBlankText() { return isValid() && m_sources.first()->hadBlankText(); } 112 113 void trace(Visitor*); 114 115 private: 116 void setLoadStatus(FontFace::LoadStatus); 117 118 UnicodeRangeSet m_ranges; 119 RawPtrWillBeMember<CSSSegmentedFontFace> m_segmentedFontFace; 120 WillBeHeapDeque<OwnPtrWillBeMember<CSSFontFaceSource> > m_sources; 121 RawPtrWillBeMember<FontFace> m_fontFace; 122 }; 123 124 } 125 126 #endif 127