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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef FontFallbackIterator_h | 5 #ifndef FontFallbackIterator_h |
6 #define FontFallbackIterator_h | 6 #define FontFallbackIterator_h |
7 | 7 |
8 #include "platform/fonts/FontDataForRangeSet.h" | 8 #include "platform/fonts/FontDataRange.h" |
9 #include "platform/fonts/FontFallbackPriority.h" | 9 #include "platform/fonts/FontFallbackPriority.h" |
10 #include "wtf/HashMap.h" | 10 #include "wtf/HashMap.h" |
11 #include "wtf/PassRefPtr.h" | 11 #include "wtf/PassRefPtr.h" |
12 #include "wtf/RefCounted.h" | 12 #include "wtf/RefCounted.h" |
13 #include "wtf/RefPtr.h" | 13 #include "wtf/RefPtr.h" |
14 #include "wtf/Vector.h" | 14 #include "wtf/Vector.h" |
15 #include "wtf/text/Unicode.h" | 15 #include "wtf/text/Unicode.h" |
16 | 16 |
17 namespace blink { | 17 namespace blink { |
18 | 18 |
19 using namespace WTF; | 19 using namespace WTF; |
20 | 20 |
21 class FontDescription; | 21 class FontDescription; |
22 class FontFallbackList; | 22 class FontFallbackList; |
23 class SimpleFontData; | 23 class SimpleFontData; |
| 24 struct FontDataRange; |
24 class FontFamily; | 25 class FontFamily; |
25 | 26 |
26 class FontFallbackIterator : public RefCounted<FontFallbackIterator> { | 27 class FontFallbackIterator : public RefCounted<FontFallbackIterator> { |
27 WTF_MAKE_NONCOPYABLE(FontFallbackIterator); | 28 WTF_MAKE_NONCOPYABLE(FontFallbackIterator); |
28 | 29 |
29 public: | 30 public: |
30 static PassRefPtr<FontFallbackIterator> create(const FontDescription&, PassR
efPtr<FontFallbackList>, | 31 static PassRefPtr<FontFallbackIterator> create(const FontDescription&, PassR
efPtr<FontFallbackList>, |
31 FontFallbackPriority); | 32 FontFallbackPriority); |
32 | 33 |
33 // Returns whether a list of all remaining characters to be shaped is | 34 // Returns whether a list of all remaining characters to be shaped is |
34 // needed. Needed by the FontfallbackIterator in order to check whether a | 35 // needed. Needed by the FontfallbackIterator in order to check whether a |
35 // font from a segmented range should be loaded. | 36 // font from a segmented range should be loaded. |
36 bool needsHintList() const; | 37 bool needsHintList() const; |
37 | 38 |
38 bool hasNext() const { return m_fallbackStage != OutOfLuck; }; | 39 bool hasNext() const { return m_fallbackStage != OutOfLuck; }; |
39 | 40 |
40 // Some system fallback APIs (Windows, Android) require a character, or a | 41 // Some system fallback APIs (Windows, Android) require a character, or a |
41 // portion of the string to be passed. On Mac and Linux, we get a list of | 42 // portion of the string to be passed. On Mac and Linux, we get a list of |
42 // fonts without passing in characters. | 43 // fonts without passing in characters. |
43 const FontDataForRangeSet next(const Vector<UChar32>& hintList); | 44 const FontDataRange next(const Vector<UChar32>& hintList); |
44 | 45 |
45 private: | 46 private: |
46 FontFallbackIterator(const FontDescription&, PassRefPtr<FontFallbackList>, | 47 FontFallbackIterator(const FontDescription&, PassRefPtr<FontFallbackList>, |
47 FontFallbackPriority); | 48 FontFallbackPriority); |
48 bool rangeSetContributesForHint(const Vector<UChar32> hintList, const FontDa
taForRangeSet&); | 49 bool rangeContributesForHint(const Vector<UChar32> hintList, const FontDataR
ange&); |
49 bool alreadyLoadingRangeForHintChar(UChar32 hintChar); | 50 bool alreadyLoadingRangeForHintChar(UChar32 hintChar); |
50 void willUseRange(const AtomicString& family, const FontDataForRangeSet&); | 51 void willUseRange(const AtomicString& family, const FontDataRange&); |
51 | 52 |
52 const PassRefPtr<SimpleFontData> fallbackPriorityFont(UChar32 hint); | 53 const PassRefPtr<SimpleFontData> fallbackPriorityFont(UChar32 hint); |
53 const PassRefPtr<SimpleFontData> uniqueSystemFontForHint(UChar32 hint); | 54 const PassRefPtr<SimpleFontData> uniqueSystemFontForHint(UChar32 hint); |
54 | 55 |
55 const FontDescription& m_fontDescription; | 56 const FontDescription& m_fontDescription; |
56 RefPtr<FontFallbackList> m_fontFallbackList; | 57 RefPtr<FontFallbackList> m_fontFallbackList; |
57 int m_currentFontDataIndex; | 58 int m_currentFontDataIndex; |
58 unsigned m_segmentedFaceIndex; | 59 unsigned m_segmentedIndex; |
59 | 60 |
60 enum FallbackStage { | 61 enum FallbackStage { |
61 FallbackPriorityFonts, | 62 FallbackPriorityFonts, |
62 FontGroupFonts, | 63 FontGroupFonts, |
63 SegmentedFace, | 64 SegmentedFace, |
64 PreferencesFonts, | 65 PreferencesFonts, |
65 SystemFonts, | 66 SystemFonts, |
66 OutOfLuck | 67 OutOfLuck |
67 }; | 68 }; |
68 | 69 |
69 FallbackStage m_fallbackStage; | 70 FallbackStage m_fallbackStage; |
70 HashMap<UChar32, RefPtr<SimpleFontData>> m_visitedSystemFonts; | 71 HashMap<UChar32, RefPtr<SimpleFontData>> m_visitedSystemFonts; |
71 Vector<FontDataForRangeSet> m_trackedLoadingRangeSets; | 72 Vector<FontDataRange> m_loadingCustomFontForRanges; |
72 FontFallbackPriority m_fontFallbackPriority; | 73 FontFallbackPriority m_fontFallbackPriority; |
73 }; | 74 }; |
74 | 75 |
75 } // namespace blink | 76 } // namespace blink |
76 | 77 |
77 #endif | 78 #endif |
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