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 // FIXME: This should really be a blacklist instead of a whitelist 31 #if USE(CG) || PLATFORM(QT) || PLATFORM(GTK) || (PLATFORM(CHROMIUM) && (OS(WINDOWS) || OS(LINUX) || OS(FREEBSD) || USE(SKIA_MAC_ON_CHROME))) || PLATFORM(HAIKU) || OS(WINCE) || PLATFORM(ANDROID) || PLATFORM(BREWMP) 32 #define STORE_FONT_CUSTOM_PLATFORM_DATA 33 #endif 34 35 #include "CachedResourceClient.h" 36 #include "CachedResourceClientWalker.h" 37 #include "CachedResourceLoader.h" 38 #include "FontPlatformData.h" 39 #include "MemoryCache.h" 40 #include "SharedBuffer.h" 41 #include "TextResourceDecoder.h" 42 #include <wtf/Vector.h> 43 44 #ifdef STORE_FONT_CUSTOM_PLATFORM_DATA 45 #include "FontCustomPlatformData.h" 46 #endif 47 48 #if ENABLE(SVG_FONTS) 49 #include "NodeList.h" 50 #include "SVGElement.h" 51 #include "SVGFontElement.h" 52 #include "SVGGElement.h" 53 #include "SVGNames.h" 54 #endif 55 56 namespace WebCore { 57 58 CachedFont::CachedFont(const String &url) 59 : CachedResource(url, FontResource) 60 , m_fontData(0) 61 , m_loadInitiated(false) 62 { 63 } 64 65 CachedFont::~CachedFont() 66 { 67 #ifdef STORE_FONT_CUSTOM_PLATFORM_DATA 68 delete m_fontData; 69 #endif 70 } 71 72 void CachedFont::load(CachedResourceLoader*) 73 { 74 // Don't load the file yet. Wait for an access before triggering the load. 75 setLoading(true); 76 } 77 78 void CachedFont::didAddClient(CachedResourceClient* c) 79 { 80 if (!isLoading()) 81 c->fontLoaded(this); 82 } 83 84 void CachedFont::data(PassRefPtr<SharedBuffer> data, bool allDataReceived) 85 { 86 if (!allDataReceived) 87 return; 88 89 m_data = data; 90 setEncodedSize(m_data.get() ? m_data->size() : 0); 91 setLoading(false); 92 checkNotify(); 93 } 94 95 void CachedFont::beginLoadIfNeeded(CachedResourceLoader* dl) 96 { 97 if (!m_loadInitiated) { 98 m_loadInitiated = true; 99 dl->load(this, false); 100 } 101 } 102 103 bool CachedFont::ensureCustomFontData() 104 { 105 #ifdef STORE_FONT_CUSTOM_PLATFORM_DATA 106 if (!m_fontData && !errorOccurred() && !isLoading() && m_data) { 107 m_fontData = createFontCustomPlatformData(m_data.get()); 108 if (!m_fontData) 109 setStatus(DecodeError); 110 } 111 #endif 112 return m_fontData; 113 } 114 115 FontPlatformData CachedFont::platformDataFromCustomData(float size, bool bold, bool italic, FontOrientation orientation, TextOrientation textOrientation, FontWidthVariant widthVariant, FontRenderingMode renderingMode) 116 { 117 #if ENABLE(SVG_FONTS) 118 if (m_externalSVGDocument) 119 return FontPlatformData(size, bold, italic); 120 #endif 121 #ifdef STORE_FONT_CUSTOM_PLATFORM_DATA 122 ASSERT(m_fontData); 123 return m_fontData->fontPlatformData(static_cast<int>(size), bold, italic, orientation, textOrientation, widthVariant, renderingMode); 124 #else 125 return FontPlatformData(); 126 #endif 127 } 128 129 #if ENABLE(SVG_FONTS) 130 bool CachedFont::ensureSVGFontData() 131 { 132 if (!m_externalSVGDocument && !errorOccurred() && !isLoading() && m_data) { 133 m_externalSVGDocument = SVGDocument::create(0, KURL()); 134 135 RefPtr<TextResourceDecoder> decoder = TextResourceDecoder::create("application/xml"); 136 String svgSource = decoder->decode(m_data->data(), m_data->size()); 137 svgSource += decoder->flush(); 138 139 m_externalSVGDocument->setContent(svgSource); 140 141 if (decoder->sawError()) 142 m_externalSVGDocument = 0; 143 } 144 145 return m_externalSVGDocument; 146 } 147 148 SVGFontElement* CachedFont::getSVGFontById(const String& fontName) const 149 { 150 RefPtr<NodeList> list = m_externalSVGDocument->getElementsByTagNameNS(SVGNames::fontTag.namespaceURI(), SVGNames::fontTag.localName()); 151 if (!list) 152 return 0; 153 154 unsigned listLength = list->length(); 155 if (!listLength) 156 return 0; 157 158 #ifndef NDEBUG 159 for (unsigned i = 0; i < listLength; ++i) { 160 ASSERT(list->item(i)); 161 ASSERT(list->item(i)->hasTagName(SVGNames::fontTag)); 162 } 163 #endif 164 165 if (fontName.isEmpty()) 166 return static_cast<SVGFontElement*>(list->item(0)); 167 168 for (unsigned i = 0; i < listLength; ++i) { 169 SVGFontElement* element = static_cast<SVGFontElement*>(list->item(i)); 170 if (element->getIdAttribute() == fontName) 171 return element; 172 } 173 174 return 0; 175 } 176 #endif 177 178 void CachedFont::allClientsRemoved() 179 { 180 #ifdef STORE_FONT_CUSTOM_PLATFORM_DATA 181 if (m_fontData) { 182 delete m_fontData; 183 m_fontData = 0; 184 } 185 #endif 186 } 187 188 void CachedFont::checkNotify() 189 { 190 if (isLoading()) 191 return; 192 193 CachedResourceClientWalker w(m_clients); 194 while (CachedResourceClient *c = w.next()) 195 c->fontLoaded(this); 196 } 197 198 199 void CachedFont::error(CachedResource::Status status) 200 { 201 setStatus(status); 202 ASSERT(errorOccurred()); 203 setLoading(false); 204 checkNotify(); 205 } 206 207 } 208
