1 /*
2 * Copyright (C) 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 "core/css/CSSSegmentedFontFace.h"
28
29 #include "core/css/CSSFontFace.h"
30 #include "core/css/CSSFontSelector.h"
31 #include "platform/RuntimeEnabledFeatures.h"
32 #include "platform/fonts/FontCache.h"
33 #include "platform/fonts/FontDescription.h"
34 #include "platform/fonts/FontFaceCreationParams.h"
35 #include "platform/fonts/SegmentedFontData.h"
36 #include "platform/fonts/SimpleFontData.h"
37
38 namespace blink {
39
CSSSegmentedFontFace(CSSFontSelector * fontSelector,FontTraits traits)40 CSSSegmentedFontFace::CSSSegmentedFontFace(CSSFontSelector* fontSelector, FontTraits traits)
41 : m_fontSelector(fontSelector)
42 , m_traits(traits)
43 , m_firstNonCssConnectedFace(m_fontFaces.end())
44 {
45 }
46
~CSSSegmentedFontFace()47 CSSSegmentedFontFace::~CSSSegmentedFontFace()
48 {
49 pruneTable();
50 #if !ENABLE(OILPAN)
51 for (FontFaceList::iterator it = m_fontFaces.begin(); it != m_fontFaces.end(); ++it)
52 (*it)->cssFontFace()->clearSegmentedFontFace();
53 #endif
54 }
55
pruneTable()56 void CSSSegmentedFontFace::pruneTable()
57 {
58 // Make sure the glyph page tree prunes out all uses of this custom font.
59 if (m_fontDataTable.isEmpty())
60 return;
61
62 m_fontDataTable.clear();
63 }
64
isValid() const65 bool CSSSegmentedFontFace::isValid() const
66 {
67 // Valid if at least one font face is valid.
68 for (FontFaceList::const_iterator it = m_fontFaces.begin(); it != m_fontFaces.end(); ++it) {
69 if ((*it)->cssFontFace()->isValid())
70 return true;
71 }
72 return false;
73 }
74
fontLoaded(CSSFontFace *)75 void CSSSegmentedFontFace::fontLoaded(CSSFontFace*)
76 {
77 pruneTable();
78 }
79
fontLoadWaitLimitExceeded(CSSFontFace *)80 void CSSSegmentedFontFace::fontLoadWaitLimitExceeded(CSSFontFace*)
81 {
82 pruneTable();
83 }
84
addFontFace(PassRefPtrWillBeRawPtr<FontFace> prpFontFace,bool cssConnected)85 void CSSSegmentedFontFace::addFontFace(PassRefPtrWillBeRawPtr<FontFace> prpFontFace, bool cssConnected)
86 {
87 RefPtrWillBeRawPtr<FontFace> fontFace = prpFontFace;
88 pruneTable();
89 fontFace->cssFontFace()->setSegmentedFontFace(this);
90 if (cssConnected) {
91 m_fontFaces.insertBefore(m_firstNonCssConnectedFace, fontFace);
92 } else {
93 // This is the only place in Blink that is using addReturnIterator.
94 FontFaceList::iterator iterator = m_fontFaces.addReturnIterator(fontFace);
95 if (m_firstNonCssConnectedFace == m_fontFaces.end())
96 m_firstNonCssConnectedFace = iterator;
97 }
98 }
99
removeFontFace(PassRefPtrWillBeRawPtr<FontFace> prpFontFace)100 void CSSSegmentedFontFace::removeFontFace(PassRefPtrWillBeRawPtr<FontFace> prpFontFace)
101 {
102 RefPtrWillBeRawPtr<FontFace> fontFace = prpFontFace;
103 FontFaceList::iterator it = m_fontFaces.find(fontFace);
104 if (it == m_fontFaces.end())
105 return;
106
107 if (it == m_firstNonCssConnectedFace)
108 ++m_firstNonCssConnectedFace;
109 m_fontFaces.remove(it);
110
111 pruneTable();
112 fontFace->cssFontFace()->clearSegmentedFontFace();
113 }
114
appendFontData(SegmentedFontData * newFontData,PassRefPtr<SimpleFontData> prpFaceFontData,const CSSFontFace::UnicodeRangeSet & ranges)115 static void appendFontData(SegmentedFontData* newFontData, PassRefPtr<SimpleFontData> prpFaceFontData, const CSSFontFace::UnicodeRangeSet& ranges)
116 {
117 RefPtr<SimpleFontData> faceFontData = prpFaceFontData;
118 unsigned numRanges = ranges.size();
119 if (!numRanges) {
120 newFontData->appendRange(FontDataRange(0, 0x7FFFFFFF, faceFontData));
121 return;
122 }
123
124 for (unsigned j = 0; j < numRanges; ++j)
125 newFontData->appendRange(FontDataRange(ranges.rangeAt(j).from(), ranges.rangeAt(j).to(), faceFontData));
126 }
127
getFontData(const FontDescription & fontDescription)128 PassRefPtr<FontData> CSSSegmentedFontFace::getFontData(const FontDescription& fontDescription)
129 {
130 if (!isValid())
131 return nullptr;
132
133 FontTraits desiredTraits = fontDescription.traits();
134 FontCacheKey key = fontDescription.cacheKey(FontFaceCreationParams(), desiredTraits);
135
136 RefPtr<SegmentedFontData>& fontData = m_fontDataTable.add(key.hash(), nullptr).storedValue->value;
137 if (fontData && fontData->numRanges())
138 return fontData; // No release, we have a reference to an object in the cache which should retain the ref count it has.
139
140 if (!fontData)
141 fontData = SegmentedFontData::create();
142
143 FontDescription requestedFontDescription(fontDescription);
144 requestedFontDescription.setTraits(m_traits);
145 requestedFontDescription.setSyntheticBold(m_traits.weight() < FontWeight600 && desiredTraits.weight() >= FontWeight600);
146 requestedFontDescription.setSyntheticItalic(m_traits.style() == FontStyleNormal && desiredTraits.style() == FontStyleItalic);
147
148 for (FontFaceList::reverse_iterator it = m_fontFaces.rbegin(); it != m_fontFaces.rend(); ++it) {
149 if (!(*it)->cssFontFace()->isValid())
150 continue;
151 if (RefPtr<SimpleFontData> faceFontData = (*it)->cssFontFace()->getFontData(requestedFontDescription)) {
152 ASSERT(!faceFontData->isSegmented());
153 #if ENABLE(SVG_FONTS)
154 // For SVG Fonts that specify that they only support the "normal" variant, we will assume they are incapable
155 // of small-caps synthesis and just ignore the font face.
156 if (faceFontData->isSVGFont() && desiredTraits.variant() == FontVariantSmallCaps && m_traits.variant() == FontVariantNormal)
157 continue;
158 #endif
159 appendFontData(fontData.get(), faceFontData.release(), (*it)->cssFontFace()->ranges());
160 }
161 }
162 if (fontData->numRanges())
163 return fontData; // No release, we have a reference to an object in the cache which should retain the ref count it has.
164
165 return nullptr;
166 }
167
isLoading() const168 bool CSSSegmentedFontFace::isLoading() const
169 {
170 for (FontFaceList::const_iterator it = m_fontFaces.begin(); it != m_fontFaces.end(); ++it) {
171 if ((*it)->loadStatus() == FontFace::Loading)
172 return true;
173 }
174 return false;
175 }
176
isLoaded() const177 bool CSSSegmentedFontFace::isLoaded() const
178 {
179 for (FontFaceList::const_iterator it = m_fontFaces.begin(); it != m_fontFaces.end(); ++it) {
180 if ((*it)->loadStatus() != FontFace::Loaded)
181 return false;
182 }
183 return true;
184 }
185
willUseFontData(const FontDescription & fontDescription,UChar32 character)186 void CSSSegmentedFontFace::willUseFontData(const FontDescription& fontDescription, UChar32 character)
187 {
188 for (FontFaceList::reverse_iterator it = m_fontFaces.rbegin(); it != m_fontFaces.rend(); ++it) {
189 if ((*it)->loadStatus() != FontFace::Unloaded)
190 break;
191 if ((*it)->cssFontFace()->maybeScheduleFontLoad(fontDescription, character))
192 break;
193 }
194 }
195
checkFont(const String & text) const196 bool CSSSegmentedFontFace::checkFont(const String& text) const
197 {
198 for (FontFaceList::const_iterator it = m_fontFaces.begin(); it != m_fontFaces.end(); ++it) {
199 if ((*it)->loadStatus() != FontFace::Loaded && (*it)->cssFontFace()->ranges().intersectsWith(text))
200 return false;
201 }
202 return true;
203 }
204
match(const String & text,WillBeHeapVector<RefPtrWillBeMember<FontFace>> & faces) const205 void CSSSegmentedFontFace::match(const String& text, WillBeHeapVector<RefPtrWillBeMember<FontFace> >& faces) const
206 {
207 for (FontFaceList::const_iterator it = m_fontFaces.begin(); it != m_fontFaces.end(); ++it) {
208 if ((*it)->cssFontFace()->ranges().intersectsWith(text))
209 faces.append(*it);
210 }
211 }
212
trace(Visitor * visitor)213 void CSSSegmentedFontFace::trace(Visitor* visitor)
214 {
215 #if ENABLE(OILPAN)
216 visitor->trace(m_fontSelector);
217 visitor->trace(m_fontFaces);
218 #endif
219 }
220
221 }
222