1 /* 2 * Copyright (C) 2007, 2008, 2011 Apple Inc. All rights reserved. 3 * (C) 2007, 2008 Nikolas Zimmermann <zimmermann (at) kde.org> 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include "config.h" 28 #include "core/css/CSSFontSelector.h" 29 30 #include "core/css/CSSFontSelectorClient.h" 31 #include "core/css/CSSSegmentedFontFace.h" 32 #include "core/css/CSSValueList.h" 33 #include "core/css/FontFaceSet.h" 34 #include "core/css/resolver/StyleResolver.h" 35 #include "core/dom/Document.h" 36 #include "core/frame/LocalFrame.h" 37 #include "core/frame/Settings.h" 38 #include "core/loader/FrameLoader.h" 39 #include "platform/RuntimeEnabledFeatures.h" 40 #include "platform/fonts/FontCache.h" 41 #include "platform/fonts/SimpleFontData.h" 42 #include "wtf/text/AtomicString.h" 43 44 namespace blink { 45 46 CSSFontSelector::CSSFontSelector(Document* document) 47 : m_document(document) 48 , m_fontLoader(FontLoader::create(this, document->fetcher())) 49 , m_genericFontFamilySettings(document->frame()->settings()->genericFontFamilySettings()) 50 { 51 // FIXME: An old comment used to say there was no need to hold a reference to m_document 52 // because "we are guaranteed to be destroyed before the document". But there does not 53 // seem to be any such guarantee. 54 55 ASSERT(m_document); 56 ASSERT(m_document->frame()); 57 FontCache::fontCache()->addClient(this); 58 FontFaceSet::from(*document)->addFontFacesToFontFaceCache(&m_fontFaceCache, this); 59 } 60 61 CSSFontSelector::~CSSFontSelector() 62 { 63 #if !ENABLE(OILPAN) 64 clearDocument(); 65 FontCache::fontCache()->removeClient(this); 66 #endif 67 } 68 69 void CSSFontSelector::registerForInvalidationCallbacks(CSSFontSelectorClient* client) 70 { 71 m_clients.add(client); 72 } 73 74 #if !ENABLE(OILPAN) 75 void CSSFontSelector::unregisterForInvalidationCallbacks(CSSFontSelectorClient* client) 76 { 77 m_clients.remove(client); 78 } 79 #endif 80 81 void CSSFontSelector::dispatchInvalidationCallbacks() 82 { 83 WillBeHeapVector<RawPtrWillBeMember<CSSFontSelectorClient> > clients; 84 copyToVector(m_clients, clients); 85 for (size_t i = 0; i < clients.size(); ++i) 86 clients[i]->fontsNeedUpdate(this); 87 } 88 89 void CSSFontSelector::fontFaceInvalidated() 90 { 91 dispatchInvalidationCallbacks(); 92 } 93 94 void CSSFontSelector::fontCacheInvalidated() 95 { 96 dispatchInvalidationCallbacks(); 97 } 98 99 static AtomicString familyNameFromSettings(const GenericFontFamilySettings& settings, const FontDescription& fontDescription, const AtomicString& genericFamilyName) 100 { 101 #if OS(ANDROID) 102 if (fontDescription.genericFamily() == FontDescription::StandardFamily) 103 return FontCache::getGenericFamilyNameForScript(FontFamilyNames::webkit_standard, fontDescription); 104 105 if (genericFamilyName.startsWith("-webkit-")) 106 return FontCache::getGenericFamilyNameForScript(genericFamilyName, fontDescription); 107 #else 108 UScriptCode script = fontDescription.script(); 109 if (fontDescription.genericFamily() == FontDescription::StandardFamily) 110 return settings.standard(script); 111 if (genericFamilyName == FontFamilyNames::webkit_serif) 112 return settings.serif(script); 113 if (genericFamilyName == FontFamilyNames::webkit_sans_serif) 114 return settings.sansSerif(script); 115 if (genericFamilyName == FontFamilyNames::webkit_cursive) 116 return settings.cursive(script); 117 if (genericFamilyName == FontFamilyNames::webkit_fantasy) 118 return settings.fantasy(script); 119 if (genericFamilyName == FontFamilyNames::webkit_monospace) 120 return settings.fixed(script); 121 if (genericFamilyName == FontFamilyNames::webkit_pictograph) 122 return settings.pictograph(script); 123 if (genericFamilyName == FontFamilyNames::webkit_standard) 124 return settings.standard(script); 125 #endif 126 return emptyAtom; 127 } 128 129 PassRefPtr<FontData> CSSFontSelector::getFontData(const FontDescription& fontDescription, const AtomicString& familyName) 130 { 131 if (CSSSegmentedFontFace* face = m_fontFaceCache.get(fontDescription, familyName)) 132 return face->getFontData(fontDescription); 133 134 // Try to return the correct font based off our settings, in case we were handed the generic font family name. 135 AtomicString settingsFamilyName = familyNameFromSettings(m_genericFontFamilySettings, fontDescription, familyName); 136 if (settingsFamilyName.isEmpty()) 137 return nullptr; 138 139 return FontCache::fontCache()->getFontData(fontDescription, settingsFamilyName); 140 } 141 142 void CSSFontSelector::willUseFontData(const FontDescription& fontDescription, const AtomicString& family, UChar32 character) 143 { 144 CSSSegmentedFontFace* face = m_fontFaceCache.get(fontDescription, family); 145 if (face) 146 face->willUseFontData(fontDescription, character); 147 } 148 149 bool CSSFontSelector::isPlatformFontAvailable(const FontDescription& fontDescription, const AtomicString& passedFamily) 150 { 151 AtomicString family = familyNameFromSettings(m_genericFontFamilySettings, fontDescription, passedFamily); 152 if (family.isEmpty()) 153 family = passedFamily; 154 return FontCache::fontCache()->isPlatformFontAvailable(fontDescription, family); 155 } 156 157 #if !ENABLE(OILPAN) 158 void CSSFontSelector::clearDocument() 159 { 160 m_fontLoader->clearResourceFetcherAndFontSelector(); 161 m_document = nullptr; 162 m_fontFaceCache.clearAll(); 163 } 164 #endif 165 166 void CSSFontSelector::updateGenericFontFamilySettings(Document& document) 167 { 168 if (!document.settings()) 169 return; 170 m_genericFontFamilySettings = document.settings()->genericFontFamilySettings(); 171 // Need to increment FontFaceCache version to update RenderStyles. 172 m_fontFaceCache.incrementVersion(); 173 } 174 175 void CSSFontSelector::trace(Visitor* visitor) 176 { 177 #if ENABLE(OILPAN) 178 visitor->trace(m_document); 179 visitor->trace(m_fontFaceCache); 180 visitor->trace(m_clients); 181 visitor->trace(m_fontLoader); 182 #endif 183 FontSelector::trace(visitor); 184 } 185 186 } 187
