1 /* 2 * Copyright (C) 2006, 2007, 2008 Apple Inc. All rights reserved. 3 * Copyright (C) 2009 Torch Mobile, Inc. 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 "CachedFont.h" 29 30 #if PLATFORM(CG) || PLATFORM(QT) || PLATFORM(GTK) || (PLATFORM(CHROMIUM) && (OS(WINDOWS) || OS(LINUX))) || PLATFORM(HAIKU) || OS(WINCE) || OS(ANDROID) 31 #define STORE_FONT_CUSTOM_PLATFORM_DATA 32 #endif 33 34 #include "Cache.h" 35 #include "CachedResourceClient.h" 36 #include "CachedResourceClientWalker.h" 37 #include "DOMImplementation.h" 38 #include "FontPlatformData.h" 39 #ifdef STORE_FONT_CUSTOM_PLATFORM_DATA 40 #include "FontCustomPlatformData.h" 41 #endif 42 #include "TextResourceDecoder.h" 43 #include "loader.h" 44 #include <wtf/Vector.h> 45 46 #if ENABLE(SVG_FONTS) 47 #include "HTMLNames.h" 48 #include "NodeList.h" 49 #include "SVGElement.h" 50 #include "SVGFontElement.h" 51 #include "SVGGElement.h" 52 #endif 53 54 namespace WebCore { 55 56 CachedFont::CachedFont(const String &url) 57 : CachedResource(url, FontResource) 58 , m_fontData(0) 59 , m_loadInitiated(false) 60 #if ENABLE(SVG_FONTS) 61 , m_isSVGFont(false) 62 #endif 63 { 64 } 65 66 CachedFont::~CachedFont() 67 { 68 #ifdef STORE_FONT_CUSTOM_PLATFORM_DATA 69 delete m_fontData; 70 #endif 71 } 72 73 void CachedFont::load(DocLoader*) 74 { 75 // Don't load the file yet. Wait for an access before triggering the load. 76 m_loading = true; 77 } 78 79 void CachedFont::didAddClient(CachedResourceClient* c) 80 { 81 if (!m_loading) 82 c->fontLoaded(this); 83 } 84 85 void CachedFont::data(PassRefPtr<SharedBuffer> data, bool allDataReceived) 86 { 87 if (!allDataReceived) 88 return; 89 90 m_data = data; 91 setEncodedSize(m_data.get() ? m_data->size() : 0); 92 m_loading = false; 93 checkNotify(); 94 } 95 96 void CachedFont::beginLoadIfNeeded(DocLoader* dl) 97 { 98 if (!m_loadInitiated) { 99 m_loadInitiated = true; 100 cache()->loader()->load(dl, this, false); 101 } 102 } 103 104 bool CachedFont::ensureCustomFontData() 105 { 106 #ifdef STORE_FONT_CUSTOM_PLATFORM_DATA 107 #if ENABLE(SVG_FONTS) 108 ASSERT(!m_isSVGFont); 109 #endif 110 if (!m_fontData && !m_errorOccurred && !m_loading && m_data) { 111 m_fontData = createFontCustomPlatformData(m_data.get()); 112 if (!m_fontData) 113 m_errorOccurred = true; 114 } 115 #endif 116 return m_fontData; 117 } 118 119 FontPlatformData CachedFont::platformDataFromCustomData(float size, bool bold, bool italic, FontRenderingMode renderingMode) 120 { 121 #if ENABLE(SVG_FONTS) 122 if (m_externalSVGDocument) 123 return FontPlatformData(size, bold, italic); 124 #endif 125 #ifdef STORE_FONT_CUSTOM_PLATFORM_DATA 126 ASSERT(m_fontData); 127 return m_fontData->fontPlatformData(static_cast<int>(size), bold, italic, renderingMode); 128 #else 129 return FontPlatformData(); 130 #endif 131 } 132 133 #if ENABLE(SVG_FONTS) 134 bool CachedFont::ensureSVGFontData() 135 { 136 ASSERT(m_isSVGFont); 137 if (!m_externalSVGDocument && !m_errorOccurred && !m_loading && m_data) { 138 m_externalSVGDocument = SVGDocument::create(0); 139 m_externalSVGDocument->open(); 140 141 RefPtr<TextResourceDecoder> decoder = TextResourceDecoder::create("application/xml"); 142 m_externalSVGDocument->write(decoder->decode(m_data->data(), m_data->size())); 143 m_externalSVGDocument->write(decoder->flush()); 144 if (decoder->sawError()) { 145 m_externalSVGDocument.clear(); 146 return 0; 147 } 148 149 m_externalSVGDocument->finishParsing(); 150 m_externalSVGDocument->close(); 151 } 152 153 return m_externalSVGDocument; 154 } 155 156 SVGFontElement* CachedFont::getSVGFontById(const String& fontName) const 157 { 158 ASSERT(m_isSVGFont); 159 RefPtr<NodeList> list = m_externalSVGDocument->getElementsByTagName(SVGNames::fontTag.localName()); 160 if (!list) 161 return 0; 162 163 unsigned fonts = list->length(); 164 for (unsigned i = 0; i < fonts; ++i) { 165 Node* node = list->item(i); 166 ASSERT(node); 167 168 if (static_cast<Element*>(node)->getAttribute(static_cast<Element*>(node)->idAttributeName()) != fontName) 169 continue; 170 171 ASSERT(node->hasTagName(SVGNames::fontTag)); 172 return static_cast<SVGFontElement*>(node); 173 } 174 175 return 0; 176 } 177 #endif 178 179 void CachedFont::allClientsRemoved() 180 { 181 #ifdef STORE_FONT_CUSTOM_PLATFORM_DATA 182 if (m_fontData) { 183 delete m_fontData; 184 m_fontData = 0; 185 } 186 #endif 187 } 188 189 void CachedFont::checkNotify() 190 { 191 if (m_loading) 192 return; 193 194 CachedResourceClientWalker w(m_clients); 195 while (CachedResourceClient *c = w.next()) 196 c->fontLoaded(this); 197 } 198 199 200 void CachedFont::error() 201 { 202 m_loading = false; 203 m_errorOccurred = true; 204 checkNotify(); 205 } 206 207 } 208
