1 /* 2 * Copyright (C) 2007, 2008, 2011 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 #include "config.h" 27 #include "core/css/CSSFontFace.h" 28 29 #include "core/css/CSSFontFaceSource.h" 30 #include "core/css/CSSFontSelector.h" 31 #include "core/css/CSSSegmentedFontFace.h" 32 #include "core/css/FontFaceSet.h" 33 #include "core/css/RemoteFontFaceSource.h" 34 #include "core/frame/UseCounter.h" 35 #include "platform/fonts/FontDescription.h" 36 #include "platform/fonts/SimpleFontData.h" 37 38 namespace blink { 39 40 void CSSFontFace::addSource(PassOwnPtrWillBeRawPtr<CSSFontFaceSource> source) 41 { 42 source->setFontFace(this); 43 m_sources.append(source); 44 } 45 46 void CSSFontFace::setSegmentedFontFace(CSSSegmentedFontFace* segmentedFontFace) 47 { 48 ASSERT(!m_segmentedFontFace); 49 m_segmentedFontFace = segmentedFontFace; 50 } 51 52 void CSSFontFace::didBeginLoad() 53 { 54 if (loadStatus() == FontFace::Unloaded) 55 setLoadStatus(FontFace::Loading); 56 } 57 58 void CSSFontFace::fontLoaded(RemoteFontFaceSource* source) 59 { 60 if (!isValid() || source != m_sources.first()) 61 return; 62 63 if (loadStatus() == FontFace::Loading) { 64 if (source->ensureFontData()) { 65 setLoadStatus(FontFace::Loaded); 66 #if ENABLE(SVG_FONTS) 67 Document* document = m_segmentedFontFace ? m_segmentedFontFace->fontSelector()->document() : 0; 68 if (document && source->isSVGFontFaceSource()) 69 UseCounter::count(*document, UseCounter::SVGFontInCSS); 70 #endif 71 } else { 72 m_sources.removeFirst(); 73 load(); 74 } 75 } 76 77 if (m_segmentedFontFace) 78 m_segmentedFontFace->fontLoaded(this); 79 } 80 81 void CSSFontFace::fontLoadWaitLimitExceeded(RemoteFontFaceSource* source) 82 { 83 if (!isValid() || source != m_sources.first()) 84 return; 85 if (m_segmentedFontFace) 86 m_segmentedFontFace->fontLoadWaitLimitExceeded(this); 87 } 88 89 PassRefPtr<SimpleFontData> CSSFontFace::getFontData(const FontDescription& fontDescription) 90 { 91 if (!isValid()) 92 return nullptr; 93 94 while (!m_sources.isEmpty()) { 95 OwnPtrWillBeMember<CSSFontFaceSource>& source = m_sources.first(); 96 if (RefPtr<SimpleFontData> result = source->getFontData(fontDescription)) { 97 if (loadStatus() == FontFace::Unloaded && (source->isLoading() || source->isLoaded())) 98 setLoadStatus(FontFace::Loading); 99 if (loadStatus() == FontFace::Loading && source->isLoaded()) 100 setLoadStatus(FontFace::Loaded); 101 return result.release(); 102 } 103 m_sources.removeFirst(); 104 } 105 106 if (loadStatus() == FontFace::Unloaded) 107 setLoadStatus(FontFace::Loading); 108 if (loadStatus() == FontFace::Loading) 109 setLoadStatus(FontFace::Error); 110 return nullptr; 111 } 112 113 bool CSSFontFace::maybeScheduleFontLoad(const FontDescription& fontDescription, UChar32 character) 114 { 115 if (m_ranges.contains(character)) { 116 if (loadStatus() == FontFace::Unloaded) 117 load(fontDescription); 118 return true; 119 } 120 return false; 121 } 122 123 void CSSFontFace::load() 124 { 125 FontDescription fontDescription; 126 FontFamily fontFamily; 127 fontFamily.setFamily(m_fontFace->family()); 128 fontDescription.setFamily(fontFamily); 129 fontDescription.setTraits(m_fontFace->traits()); 130 load(fontDescription); 131 } 132 133 void CSSFontFace::load(const FontDescription& fontDescription) 134 { 135 if (loadStatus() == FontFace::Unloaded) 136 setLoadStatus(FontFace::Loading); 137 ASSERT(loadStatus() == FontFace::Loading); 138 139 while (!m_sources.isEmpty()) { 140 OwnPtrWillBeMember<CSSFontFaceSource>& source = m_sources.first(); 141 if (source->isValid()) { 142 if (source->isLocal()) { 143 if (source->isLocalFontAvailable(fontDescription)) { 144 setLoadStatus(FontFace::Loaded); 145 return; 146 } 147 } else { 148 if (!source->isLoaded()) 149 source->beginLoadIfNeeded(); 150 else 151 setLoadStatus(FontFace::Loaded); 152 return; 153 } 154 } 155 m_sources.removeFirst(); 156 } 157 setLoadStatus(FontFace::Error); 158 } 159 160 void CSSFontFace::setLoadStatus(FontFace::LoadStatus newStatus) 161 { 162 ASSERT(m_fontFace); 163 if (newStatus == FontFace::Error) 164 m_fontFace->setError(); 165 else 166 m_fontFace->setLoadStatus(newStatus); 167 168 if (!m_segmentedFontFace) 169 return; 170 Document* document = m_segmentedFontFace->fontSelector()->document(); 171 if (!document) 172 return; 173 174 switch (newStatus) { 175 case FontFace::Loading: 176 FontFaceSet::from(*document)->beginFontLoading(m_fontFace); 177 break; 178 case FontFace::Loaded: 179 FontFaceSet::from(*document)->fontLoaded(m_fontFace); 180 break; 181 case FontFace::Error: 182 FontFaceSet::from(*document)->loadError(m_fontFace); 183 break; 184 default: 185 break; 186 } 187 } 188 189 CSSFontFace::UnicodeRangeSet::UnicodeRangeSet(const Vector<UnicodeRange>& ranges) 190 : m_ranges(ranges) 191 { 192 if (m_ranges.isEmpty()) 193 return; 194 195 std::sort(m_ranges.begin(), m_ranges.end()); 196 197 // Unify overlapping ranges. 198 UChar32 from = m_ranges[0].from(); 199 UChar32 to = m_ranges[0].to(); 200 size_t targetIndex = 0; 201 for (size_t i = 1; i < m_ranges.size(); i++) { 202 if (to + 1 >= m_ranges[i].from()) { 203 to = std::max(to, m_ranges[i].to()); 204 } else { 205 m_ranges[targetIndex++] = UnicodeRange(from, to); 206 from = m_ranges[i].from(); 207 to = m_ranges[i].to(); 208 } 209 } 210 m_ranges[targetIndex++] = UnicodeRange(from, to); 211 m_ranges.shrink(targetIndex); 212 } 213 214 bool CSSFontFace::UnicodeRangeSet::contains(UChar32 c) const 215 { 216 if (isEntireRange()) 217 return true; 218 Vector<UnicodeRange>::const_iterator it = std::lower_bound(m_ranges.begin(), m_ranges.end(), c); 219 return it != m_ranges.end() && it->contains(c); 220 } 221 222 bool CSSFontFace::UnicodeRangeSet::intersectsWith(const String& text) const 223 { 224 if (text.isEmpty()) 225 return false; 226 if (isEntireRange()) 227 return true; 228 if (text.is8Bit() && m_ranges[0].from() >= 0x100) 229 return false; 230 231 unsigned index = 0; 232 while (index < text.length()) { 233 UChar32 c = text.characterStartingAt(index); 234 index += U16_LENGTH(c); 235 if (contains(c)) 236 return true; 237 } 238 return false; 239 } 240 241 void CSSFontFace::trace(Visitor* visitor) 242 { 243 visitor->trace(m_segmentedFontFace); 244 visitor->trace(m_sources); 245 visitor->trace(m_fontFace); 246 } 247 248 } 249