1 /*
2 * This file is part of the internal font implementation.
3 *
4 * Copyright (C) 2006, 2008, 2010 Apple Inc. All rights reserved.
5 * Copyright (C) 2007-2008 Torch Mobile, Inc.
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
16 *
17 * You should have received a copy of the GNU Library General Public License
18 * along with this library; see the file COPYING.LIB. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
20 * Boston, MA 02110-1301, USA.
21 *
22 */
23
24 #ifndef SimpleFontData_h
25 #define SimpleFontData_h
26
27 #include "FontBaseline.h"
28 #include "FontData.h"
29 #include "FontMetrics.h"
30 #include "FontPlatformData.h"
31 #include "FloatRect.h"
32 #include "GlyphMetricsMap.h"
33 #include "GlyphPageTreeNode.h"
34 #include "TypesettingFeatures.h"
35 #include <wtf/OwnPtr.h>
36 #include <wtf/PassOwnPtr.h>
37
38 #if USE(ATSUI)
39 typedef struct OpaqueATSUStyle* ATSUStyle;
40 #endif
41
42 #if PLATFORM(MAC) || USE(CORE_TEXT)
43 #include <wtf/RetainPtr.h>
44 #endif
45
46 #if (PLATFORM(WIN) && !OS(WINCE)) \
47 || (OS(WINDOWS) && PLATFORM(WX))
48 #include <usp10.h>
49 #endif
50
51 #if USE(CAIRO)
52 #include <cairo.h>
53 #endif
54
55 #if PLATFORM(QT)
56 #include <QFont>
57 #endif
58
59 #if PLATFORM(HAIKU)
60 #include <Font.h>
61 #endif
62
63 namespace WebCore {
64
65 class FontDescription;
66 class SharedBuffer;
67 class SVGFontData;
68
69 enum FontDataVariant { AutoVariant, NormalVariant, SmallCapsVariant, EmphasisMarkVariant };
70 enum Pitch { UnknownPitch, FixedPitch, VariablePitch };
71
72 class SimpleFontData : public FontData {
73 public:
74 SimpleFontData(const FontPlatformData&, bool isCustomFont = false, bool isLoading = false, bool isTextOrientationFallback = false);
75 #if ENABLE(SVG_FONTS)
76 SimpleFontData(PassOwnPtr<SVGFontData>, int size, bool syntheticBold, bool syntheticItalic);
77 #endif
78 virtual ~SimpleFontData();
79
platformData()80 const FontPlatformData& platformData() const { return m_platformData; }
81
82 SimpleFontData* smallCapsFontData(const FontDescription&) const;
83 SimpleFontData* emphasisMarkFontData(const FontDescription&) const;
84
variantFontData(const FontDescription & description,FontDataVariant variant)85 SimpleFontData* variantFontData(const FontDescription& description, FontDataVariant variant) const
86 {
87 switch (variant) {
88 case SmallCapsVariant:
89 return smallCapsFontData(description);
90 case EmphasisMarkVariant:
91 return emphasisMarkFontData(description);
92 case AutoVariant:
93 case NormalVariant:
94 break;
95 }
96 ASSERT_NOT_REACHED();
97 return const_cast<SimpleFontData*>(this);
98 }
99
100 SimpleFontData* verticalRightOrientationFontData() const;
101 SimpleFontData* uprightOrientationFontData() const;
102 SimpleFontData* brokenIdeographFontData() const;
103
hasVerticalGlyphs()104 bool hasVerticalGlyphs() const { return m_hasVerticalGlyphs; }
isTextOrientationFallback()105 bool isTextOrientationFallback() const { return m_isTextOrientationFallback; }
106
fontMetrics()107 const FontMetrics& fontMetrics() const { return m_fontMetrics; }
maxCharWidth()108 float maxCharWidth() const { return m_maxCharWidth; }
avgCharWidth()109 float avgCharWidth() const { return m_avgCharWidth; }
110
111 FloatRect boundsForGlyph(Glyph) const;
112 float widthForGlyph(Glyph glyph) const;
113 FloatRect platformBoundsForGlyph(Glyph) const;
114 float platformWidthForGlyph(Glyph) const;
115
spaceWidth()116 float spaceWidth() const { return m_spaceWidth; }
117
118 #if USE(CG) || USE(CAIRO) || PLATFORM(WX) || USE(SKIA_ON_MAC_CHROME)
syntheticBoldOffset()119 float syntheticBoldOffset() const { return m_syntheticBoldOffset; }
120 #endif
121
spaceGlyph()122 Glyph spaceGlyph() const { return m_spaceGlyph; }
isZeroWidthSpaceGlyph(Glyph glyph)123 bool isZeroWidthSpaceGlyph(Glyph glyph) const { return glyph == m_zeroWidthSpaceGlyph && glyph; }
124
125 virtual const SimpleFontData* fontDataForCharacter(UChar32) const;
126 virtual bool containsCharacters(const UChar*, int length) const;
127
128 void determinePitch();
pitch()129 Pitch pitch() const { return m_treatAsFixedPitch ? FixedPitch : VariablePitch; }
130
131 #if ENABLE(SVG_FONTS)
svgFontData()132 SVGFontData* svgFontData() const { return m_svgFontData.get(); }
isSVGFont()133 bool isSVGFont() const { return m_svgFontData; }
134 #else
isSVGFont()135 bool isSVGFont() const { return false; }
136 #endif
137
isCustomFont()138 virtual bool isCustomFont() const { return m_isCustomFont; }
isLoading()139 virtual bool isLoading() const { return m_isLoading; }
140 virtual bool isSegmented() const;
141
missingGlyphData()142 const GlyphData& missingGlyphData() const { return m_missingGlyphData; }
143
144 #ifndef NDEBUG
145 virtual String description() const;
146 #endif
147
148 #if PLATFORM(MAC) || (PLATFORM(CHROMIUM) && OS(DARWIN))
getNSFont()149 NSFont* getNSFont() const { return m_platformData.font(); }
150 #elif (PLATFORM(WX) && OS(DARWIN))
getNSFont()151 NSFont* getNSFont() const { return m_platformData.nsFont(); }
152 #endif
153
154 #if PLATFORM(MAC) || USE(CORE_TEXT)
155 CFDictionaryRef getCFStringAttributes(TypesettingFeatures, FontOrientation) const;
156 #endif
157
158 #if USE(ATSUI)
159 void checkShapesArabic() const;
shapesArabic()160 bool shapesArabic() const
161 {
162 if (!m_checkedShapesArabic)
163 checkShapesArabic();
164 return m_shapesArabic;
165 }
166 #endif
167
168 #if PLATFORM(QT)
getQtFont()169 QFont getQtFont() const { return m_platformData.font(); }
170 #endif
171
172 #if PLATFORM(WIN) || (OS(WINDOWS) && PLATFORM(WX))
isSystemFont()173 bool isSystemFont() const { return m_isSystemFont; }
174 #if !OS(WINCE) // disable unused members to save space
175 SCRIPT_FONTPROPERTIES* scriptFontProperties() const;
scriptCache()176 SCRIPT_CACHE* scriptCache() const { return &m_scriptCache; }
177 #endif
178 static void setShouldApplyMacAscentHack(bool);
179 static bool shouldApplyMacAscentHack();
180 #endif
181
182 #if PLATFORM(WX)
getWxFont()183 wxFont* getWxFont() const { return m_platformData.font(); }
184 #endif
185
186 private:
187 void platformInit();
188 void platformGlyphInit();
189 void platformCharWidthInit();
190 void platformDestroy();
191
192 void initCharWidths();
193
194 void commonInit();
195
196 SimpleFontData* scaledFontData(const FontDescription&, float scaleFactor) const;
197
198 #if (PLATFORM(WIN) && !OS(WINCE)) \
199 || (OS(WINDOWS) && PLATFORM(WX))
200 void initGDIFont();
201 void platformCommonDestroy();
202 FloatRect boundsForGDIGlyph(Glyph glyph) const;
203 float widthForGDIGlyph(Glyph glyph) const;
204 #endif
205
206 FontMetrics m_fontMetrics;
207 float m_maxCharWidth;
208 float m_avgCharWidth;
209
210 FontPlatformData m_platformData;
211
212 mutable OwnPtr<GlyphMetricsMap<FloatRect> > m_glyphToBoundsMap;
213 mutable GlyphMetricsMap<float> m_glyphToWidthMap;
214
215 bool m_treatAsFixedPitch;
216
217 #if ENABLE(SVG_FONTS)
218 OwnPtr<SVGFontData> m_svgFontData;
219 #endif
220
221 bool m_isCustomFont; // Whether or not we are custom font loaded via @font-face
222 bool m_isLoading; // Whether or not this custom font is still in the act of loading.
223
224 bool m_isTextOrientationFallback;
225 bool m_isBrokenIdeographFallback;
226 bool m_hasVerticalGlyphs;
227
228 Glyph m_spaceGlyph;
229 float m_spaceWidth;
230
231 Glyph m_zeroWidthSpaceGlyph;
232
233 GlyphData m_missingGlyphData;
234
235 struct DerivedFontData {
236 static PassOwnPtr<DerivedFontData> create(bool forCustomFont);
237 ~DerivedFontData();
238
239 bool forCustomFont;
240 OwnPtr<SimpleFontData> smallCaps;
241 OwnPtr<SimpleFontData> emphasisMark;
242 OwnPtr<SimpleFontData> brokenIdeograph;
243 OwnPtr<SimpleFontData> verticalRightOrientation;
244 OwnPtr<SimpleFontData> uprightOrientation;
245
246 private:
DerivedFontDataDerivedFontData247 DerivedFontData(bool custom)
248 : forCustomFont(custom)
249 {
250 }
251 };
252
253 mutable OwnPtr<DerivedFontData> m_derivedFontData;
254
255 #if USE(CG) || USE(CAIRO) || PLATFORM(WX) || USE(SKIA_ON_MAC_CHROME)
256 float m_syntheticBoldOffset;
257 #endif
258
259 #ifdef BUILDING_ON_TIGER
260 public:
261 void* m_styleGroup;
262
263 private:
264 #endif
265
266 #if USE(ATSUI)
267 public:
268 mutable HashMap<unsigned, ATSUStyle> m_ATSUStyleMap;
269 mutable bool m_ATSUMirrors;
270 mutable bool m_checkedShapesArabic;
271 mutable bool m_shapesArabic;
272
273 private:
274 #endif
275
276 #if PLATFORM(MAC) || USE(CORE_TEXT)
277 mutable HashMap<unsigned, RetainPtr<CFDictionaryRef> > m_CFStringAttributes;
278 #endif
279
280 #if PLATFORM(WIN) || (OS(WINDOWS) && PLATFORM(WX))
281 bool m_isSystemFont;
282 #if !OS(WINCE) // disable unused members to save space
283 mutable SCRIPT_CACHE m_scriptCache;
284 mutable SCRIPT_FONTPROPERTIES* m_scriptFontProperties;
285 #endif
286 #endif
287 };
288
289
290 #if !PLATFORM(QT)
boundsForGlyph(Glyph glyph)291 ALWAYS_INLINE FloatRect SimpleFontData::boundsForGlyph(Glyph glyph) const
292 {
293 if (isZeroWidthSpaceGlyph(glyph))
294 return FloatRect();
295
296 FloatRect bounds;
297 if (m_glyphToBoundsMap) {
298 bounds = m_glyphToBoundsMap->metricsForGlyph(glyph);
299 if (bounds.width() != cGlyphSizeUnknown)
300 return bounds;
301 }
302
303 bounds = platformBoundsForGlyph(glyph);
304 if (!m_glyphToBoundsMap)
305 m_glyphToBoundsMap = adoptPtr(new GlyphMetricsMap<FloatRect>);
306 m_glyphToBoundsMap->setMetricsForGlyph(glyph, bounds);
307 return bounds;
308 }
309
widthForGlyph(Glyph glyph)310 ALWAYS_INLINE float SimpleFontData::widthForGlyph(Glyph glyph) const
311 {
312 if (isZeroWidthSpaceGlyph(glyph))
313 return 0;
314
315 float width = m_glyphToWidthMap.metricsForGlyph(glyph);
316 if (width != cGlyphSizeUnknown)
317 return width;
318
319 width = platformWidthForGlyph(glyph);
320 m_glyphToWidthMap.setMetricsForGlyph(glyph, width);
321 return width;
322 }
323 #endif
324
325 } // namespace WebCore
326
327 #endif // SimpleFontData_h
328