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