1 /*
2 * Copyright (C) 2007, 2008, 2010 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 "CSSFontFaceSource.h"
28
29 #include "CachedFont.h"
30 #include "CSSFontFace.h"
31 #include "CSSFontSelector.h"
32 #include "CachedResourceLoader.h"
33 #include "FontCache.h"
34 #include "FontDescription.h"
35 #include "GlyphPageTreeNode.h"
36 #include "SimpleFontData.h"
37
38 #if ENABLE(SVG_FONTS)
39 #include "FontCustomPlatformData.h"
40 #include "SVGFontData.h"
41 #include "SVGFontElement.h"
42 #include "SVGFontFaceElement.h"
43 #include "SVGNames.h"
44 #include "SVGURIReference.h"
45 #endif
46
47 namespace WebCore {
48
CSSFontFaceSource(const String & str,CachedFont * font)49 CSSFontFaceSource::CSSFontFaceSource(const String& str, CachedFont* font)
50 : m_string(str)
51 , m_font(font)
52 , m_face(0)
53 #if ENABLE(SVG_FONTS)
54 , m_hasExternalSVGFont(false)
55 #endif
56 {
57 if (m_font)
58 m_font->addClient(this);
59 }
60
~CSSFontFaceSource()61 CSSFontFaceSource::~CSSFontFaceSource()
62 {
63 if (m_font)
64 m_font->removeClient(this);
65 pruneTable();
66 }
67
pruneTable()68 void CSSFontFaceSource::pruneTable()
69 {
70 if (m_fontDataTable.isEmpty())
71 return;
72 HashMap<unsigned, SimpleFontData*>::iterator end = m_fontDataTable.end();
73 for (HashMap<unsigned, SimpleFontData*>::iterator it = m_fontDataTable.begin(); it != end; ++it)
74 GlyphPageTreeNode::pruneTreeCustomFontData(it->second);
75 deleteAllValues(m_fontDataTable);
76 m_fontDataTable.clear();
77 }
78
isLoaded() const79 bool CSSFontFaceSource::isLoaded() const
80 {
81 if (m_font)
82 return m_font->isLoaded();
83 return true;
84 }
85
isValid() const86 bool CSSFontFaceSource::isValid() const
87 {
88 if (m_font)
89 return !m_font->errorOccurred();
90 return true;
91 }
92
fontLoaded(CachedFont *)93 void CSSFontFaceSource::fontLoaded(CachedFont*)
94 {
95 pruneTable();
96 if (m_face)
97 m_face->fontLoaded(this);
98 }
99
getFontData(const FontDescription & fontDescription,bool syntheticBold,bool syntheticItalic,CSSFontSelector * fontSelector)100 SimpleFontData* CSSFontFaceSource::getFontData(const FontDescription& fontDescription, bool syntheticBold, bool syntheticItalic, CSSFontSelector* fontSelector)
101 {
102 // If the font hasn't loaded or an error occurred, then we've got nothing.
103 if (!isValid())
104 return 0;
105
106 #if ENABLE(SVG_FONTS)
107 if (!m_font && !m_svgFontFaceElement) {
108 #else
109 if (!m_font) {
110 #endif
111 SimpleFontData* fontData = fontCache()->getCachedFontData(fontDescription, m_string);
112
113 // We're local. Just return a SimpleFontData from the normal cache.
114 return fontData;
115 }
116
117 // See if we have a mapping in our FontData cache.
118 unsigned hashKey = (fontDescription.computedPixelSize() + 1) << 6 | fontDescription.widthVariant() << 4
119 | (fontDescription.textOrientation() == TextOrientationUpright ? 8 : 0) | (fontDescription.orientation() == Vertical ? 4 : 0) | (syntheticBold ? 2 : 0) | (syntheticItalic ? 1 : 0);
120 if (SimpleFontData* cachedData = m_fontDataTable.get(hashKey))
121 return cachedData;
122
123 OwnPtr<SimpleFontData> fontData;
124
125 // If we are still loading, then we let the system pick a font.
126 if (isLoaded()) {
127 if (m_font) {
128 #if ENABLE(SVG_FONTS)
129 if (m_hasExternalSVGFont) {
130 // For SVG fonts parse the external SVG document, and extract the <font> element.
131 if (!m_font->ensureSVGFontData())
132 return 0;
133
134 if (!m_externalSVGFontElement)
135 m_externalSVGFontElement = m_font->getSVGFontById(SVGURIReference::getTarget(m_string));
136
137 if (!m_externalSVGFontElement)
138 return 0;
139
140 SVGFontFaceElement* fontFaceElement = 0;
141
142 // Select first <font-face> child
143 for (Node* fontChild = m_externalSVGFontElement->firstChild(); fontChild; fontChild = fontChild->nextSibling()) {
144 if (fontChild->hasTagName(SVGNames::font_faceTag)) {
145 fontFaceElement = static_cast<SVGFontFaceElement*>(fontChild);
146 break;
147 }
148 }
149
150 if (fontFaceElement) {
151 if (!m_svgFontFaceElement) {
152 // We're created using a CSS @font-face rule, that means we're not associated with a SVGFontFaceElement.
153 // Use the imported <font-face> tag as referencing font-face element for these cases.
154 m_svgFontFaceElement = fontFaceElement;
155 }
156
157 fontData.set(new SimpleFontData(adoptPtr(new SVGFontData(fontFaceElement)), fontDescription.computedPixelSize(), syntheticBold, syntheticItalic));
158 }
159 } else
160 #endif
161 {
162 // Create new FontPlatformData from our CGFontRef, point size and ATSFontRef.
163 if (!m_font->ensureCustomFontData())
164 return 0;
165
166 fontData.set(new SimpleFontData(m_font->platformDataFromCustomData(fontDescription.computedPixelSize(), syntheticBold, syntheticItalic, fontDescription.orientation(),
167 fontDescription.textOrientation(), fontDescription.widthVariant(), fontDescription.renderingMode()), true, false));
168 }
169 } else {
170 #if ENABLE(SVG_FONTS)
171 // In-Document SVG Fonts
172 if (m_svgFontFaceElement)
173 fontData.set(new SimpleFontData(adoptPtr(new SVGFontData(m_svgFontFaceElement.get())), fontDescription.computedPixelSize(), syntheticBold, syntheticItalic));
174 #endif
175 }
176 } else {
177 // Kick off the load now.
178 if (CachedResourceLoader* cachedResourceLoader = fontSelector->cachedResourceLoader())
179 m_font->beginLoadIfNeeded(cachedResourceLoader);
180 // FIXME: m_string is a URL so it makes no sense to pass it as a family name.
181 SimpleFontData* tempData = fontCache()->getCachedFontData(fontDescription, m_string);
182 if (!tempData)
183 tempData = fontCache()->getLastResortFallbackFont(fontDescription);
184
185 fontData.set(new SimpleFontData(tempData->platformData(), true, true));
186 }
187
188 SimpleFontData* fontDataRawPtr = fontData.leakPtr();
189 m_fontDataTable.set(hashKey, fontDataRawPtr);
190
191 return fontDataRawPtr;
192 }
193
194 #if ENABLE(SVG_FONTS)
195 SVGFontFaceElement* CSSFontFaceSource::svgFontFaceElement() const
196 {
197 return m_svgFontFaceElement.get();
198 }
199
200 void CSSFontFaceSource::setSVGFontFaceElement(PassRefPtr<SVGFontFaceElement> element)
201 {
202 m_svgFontFaceElement = element;
203 }
204
205 bool CSSFontFaceSource::isSVGFontFaceSource() const
206 {
207 return m_svgFontFaceElement || m_hasExternalSVGFont;
208 }
209 #endif
210
211 }
212