1 /*
2 * Copyright (C) 2007, 2008 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 "DocLoader.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 "HTMLNames.h"
41 #include "SVGFontData.h"
42 #include "SVGFontElement.h"
43 #include "SVGURIReference.h"
44 #endif
45
46 namespace WebCore {
47
CSSFontFaceSource(const String & str,CachedFont * font)48 CSSFontFaceSource::CSSFontFaceSource(const String& str, CachedFont* font)
49 : m_string(str)
50 , m_font(font)
51 , m_face(0)
52 #if ENABLE(SVG_FONTS)
53 , m_svgFontFaceElement(0)
54 #endif
55 {
56 if (m_font)
57 m_font->addClient(this);
58 }
59
~CSSFontFaceSource()60 CSSFontFaceSource::~CSSFontFaceSource()
61 {
62 if (m_font)
63 m_font->removeClient(this);
64 pruneTable();
65 }
66
pruneTable()67 void CSSFontFaceSource::pruneTable()
68 {
69 if (m_fontDataTable.isEmpty())
70 return;
71 HashMap<unsigned, SimpleFontData*>::iterator end = m_fontDataTable.end();
72 for (HashMap<unsigned, SimpleFontData*>::iterator it = m_fontDataTable.begin(); it != end; ++it)
73 GlyphPageTreeNode::pruneTreeCustomFontData(it->second);
74 deleteAllValues(m_fontDataTable);
75 m_fontDataTable.clear();
76 }
77
isLoaded() const78 bool CSSFontFaceSource::isLoaded() const
79 {
80 if (m_font)
81 return m_font->isLoaded();
82 return true;
83 }
84
isValid() const85 bool CSSFontFaceSource::isValid() const
86 {
87 if (m_font)
88 return !m_font->errorOccurred();
89 return true;
90 }
91
fontLoaded(CachedFont *)92 void CSSFontFaceSource::fontLoaded(CachedFont*)
93 {
94 pruneTable();
95 if (m_face)
96 m_face->fontLoaded(this);
97 }
98
getFontData(const FontDescription & fontDescription,bool syntheticBold,bool syntheticItalic,CSSFontSelector * fontSelector)99 SimpleFontData* CSSFontFaceSource::getFontData(const FontDescription& fontDescription, bool syntheticBold, bool syntheticItalic, CSSFontSelector* fontSelector)
100 {
101 // If the font hasn't loaded or an error occurred, then we've got nothing.
102 if (!isValid())
103 return 0;
104
105 #if ENABLE(SVG_FONTS)
106 if (!m_font && !m_svgFontFaceElement) {
107 #else
108 if (!m_font) {
109 #endif
110 SimpleFontData* fontData = fontCache()->getCachedFontData(fontDescription, m_string);
111
112 // We're local. Just return a SimpleFontData from the normal cache.
113 return fontData;
114 }
115
116 // See if we have a mapping in our FontData cache.
117 unsigned hashKey = fontDescription.computedPixelSize() << 2 | (syntheticBold ? 2 : 0) | (syntheticItalic ? 1 : 0);
118 if (SimpleFontData* cachedData = m_fontDataTable.get(hashKey))
119 return cachedData;
120
121 OwnPtr<SimpleFontData> fontData;
122
123 // If we are still loading, then we let the system pick a font.
124 if (isLoaded()) {
125 if (m_font) {
126 #if ENABLE(SVG_FONTS)
127 if (m_font->isSVGFont()) {
128 // For SVG fonts parse the external SVG document, and extract the <font> element.
129 if (!m_font->ensureSVGFontData())
130 return 0;
131
132 if (!m_externalSVGFontElement)
133 m_externalSVGFontElement = m_font->getSVGFontById(SVGURIReference::getTarget(m_string));
134
135 if (!m_externalSVGFontElement)
136 return 0;
137
138 SVGFontFaceElement* fontFaceElement = 0;
139
140 // Select first <font-face> child
141 for (Node* fontChild = m_externalSVGFontElement->firstChild(); fontChild; fontChild = fontChild->nextSibling()) {
142 if (fontChild->hasTagName(SVGNames::font_faceTag)) {
143 fontFaceElement = static_cast<SVGFontFaceElement*>(fontChild);
144 break;
145 }
146 }
147
148 if (fontFaceElement) {
149 if (!m_svgFontFaceElement) {
150 // We're created using a CSS @font-face rule, that means we're not associated with a SVGFontFaceElement.
151 // Use the imported <font-face> tag as referencing font-face element for these cases.
152 m_svgFontFaceElement = fontFaceElement;
153 }
154
155 SVGFontData* svgFontData = new SVGFontData(fontFaceElement);
156 fontData.set(new SimpleFontData(m_font->platformDataFromCustomData(fontDescription.computedPixelSize(), syntheticBold, syntheticItalic, fontDescription.renderingMode()), true, false, svgFontData));
157 }
158 } else
159 #endif
160 {
161 // Create new FontPlatformData from our CGFontRef, point size and ATSFontRef.
162 if (!m_font->ensureCustomFontData())
163 return 0;
164
165 fontData.set(new SimpleFontData(m_font->platformDataFromCustomData(fontDescription.computedPixelSize(), syntheticBold, syntheticItalic, fontDescription.renderingMode()), true, false));
166 }
167 } else {
168 #if ENABLE(SVG_FONTS)
169 // In-Document SVG Fonts
170 if (m_svgFontFaceElement) {
171 SVGFontData* svgFontData = new SVGFontData(m_svgFontFaceElement);
172 fontData.set(new SimpleFontData(FontPlatformData(fontDescription.computedPixelSize(), syntheticBold, syntheticItalic), true, false, svgFontData));
173 }
174 #endif
175 }
176 } else {
177 // Kick off the load now.
178 if (DocLoader* docLoader = fontSelector->docLoader())
179 m_font->beginLoadIfNeeded(docLoader);
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 m_fontDataTable.set(hashKey, fontData.get());
189 return fontData.release();
190 }
191
192 }
193
194