OLD | NEW |
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/FontDataRange.h" | 8 #include "platform/fonts/FontDataForRangeSet.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; | |
25 class FontFamily; | 24 class FontFamily; |
26 | 25 |
27 class FontFallbackIterator : public RefCounted<FontFallbackIterator> { | 26 class FontFallbackIterator : public RefCounted<FontFallbackIterator> { |
28 WTF_MAKE_NONCOPYABLE(FontFallbackIterator); | 27 WTF_MAKE_NONCOPYABLE(FontFallbackIterator); |
29 | 28 |
30 public: | 29 public: |
31 static PassRefPtr<FontFallbackIterator> create(const FontDescription&, PassR
efPtr<FontFallbackList>, | 30 static PassRefPtr<FontFallbackIterator> create(const FontDescription&, PassR
efPtr<FontFallbackList>, |
32 FontFallbackPriority); | 31 FontFallbackPriority); |
33 | 32 |
34 // Returns whether a list of all remaining characters to be shaped is | 33 // Returns whether a list of all remaining characters to be shaped is |
35 // needed. Needed by the FontfallbackIterator in order to check whether a | 34 // needed. Needed by the FontfallbackIterator in order to check whether a |
36 // font from a segmented range should be loaded. | 35 // font from a segmented range should be loaded. |
37 bool needsHintList() const; | 36 bool needsHintList() const; |
38 | 37 |
39 bool hasNext() const { return m_fallbackStage != OutOfLuck; }; | 38 bool hasNext() const { return m_fallbackStage != OutOfLuck; }; |
40 | 39 |
41 // Some system fallback APIs (Windows, Android) require a character, or a | 40 // Some system fallback APIs (Windows, Android) require a character, or a |
42 // portion of the string to be passed. On Mac and Linux, we get a list of | 41 // portion of the string to be passed. On Mac and Linux, we get a list of |
43 // fonts without passing in characters. | 42 // fonts without passing in characters. |
44 const FontDataRange next(const Vector<UChar32>& hintList); | 43 const FontDataForRangeSet next(const Vector<UChar32>& hintList); |
45 | 44 |
46 private: | 45 private: |
47 FontFallbackIterator(const FontDescription&, PassRefPtr<FontFallbackList>, | 46 FontFallbackIterator(const FontDescription&, PassRefPtr<FontFallbackList>, |
48 FontFallbackPriority); | 47 FontFallbackPriority); |
49 bool rangeContributesForHint(const Vector<UChar32> hintList, const FontDataR
ange&); | 48 bool rangeSetContributesForHint(const Vector<UChar32> hintList, const FontDa
taForRangeSet&); |
50 bool alreadyLoadingRangeForHintChar(UChar32 hintChar); | 49 bool alreadyLoadingRangeForHintChar(UChar32 hintChar); |
51 void willUseRange(const AtomicString& family, const FontDataRange&); | 50 void willUseRange(const AtomicString& family, const FontDataForRangeSet&); |
52 | 51 |
53 const PassRefPtr<SimpleFontData> fallbackPriorityFont(UChar32 hint); | 52 const PassRefPtr<SimpleFontData> fallbackPriorityFont(UChar32 hint); |
54 const PassRefPtr<SimpleFontData> uniqueSystemFontForHint(UChar32 hint); | 53 const PassRefPtr<SimpleFontData> uniqueSystemFontForHint(UChar32 hint); |
55 | 54 |
56 const FontDescription& m_fontDescription; | 55 const FontDescription& m_fontDescription; |
57 RefPtr<FontFallbackList> m_fontFallbackList; | 56 RefPtr<FontFallbackList> m_fontFallbackList; |
58 int m_currentFontDataIndex; | 57 int m_currentFontDataIndex; |
59 unsigned m_segmentedIndex; | 58 unsigned m_segmentedFaceIndex; |
60 | 59 |
61 enum FallbackStage { | 60 enum FallbackStage { |
62 FallbackPriorityFonts, | 61 FallbackPriorityFonts, |
63 FontGroupFonts, | 62 FontGroupFonts, |
64 SegmentedFace, | 63 SegmentedFace, |
65 PreferencesFonts, | 64 PreferencesFonts, |
66 SystemFonts, | 65 SystemFonts, |
67 OutOfLuck | 66 OutOfLuck |
68 }; | 67 }; |
69 | 68 |
70 FallbackStage m_fallbackStage; | 69 FallbackStage m_fallbackStage; |
71 HashMap<UChar32, RefPtr<SimpleFontData>> m_visitedSystemFonts; | 70 HashMap<UChar32, RefPtr<SimpleFontData>> m_visitedSystemFonts; |
72 Vector<FontDataRange> m_loadingCustomFontForRanges; | 71 Vector<FontDataForRangeSet> m_trackedLoadingRangeSets; |
73 FontFallbackPriority m_fontFallbackPriority; | 72 FontFallbackPriority m_fontFallbackPriority; |
74 }; | 73 }; |
75 | 74 |
76 } // namespace blink | 75 } // namespace blink |
77 | 76 |
78 #endif | 77 #endif |
OLD | NEW |