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1 /* | 1 /* |
2 * Copyright (C) 2011 Google Inc. All rights reserved. | 2 * Copyright (C) 2011 Google Inc. All rights reserved. |
3 * | 3 * |
4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
5 * modification, are permitted provided that the following conditions are | 5 * modification, are permitted provided that the following conditions are |
6 * met: | 6 * met: |
7 * | 7 * |
8 * * Redistributions of source code must retain the above copyright | 8 * * Redistributions of source code must retain the above copyright |
9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
10 * * Redistributions in binary form must reproduce the above | 10 * * Redistributions in binary form must reproduce the above |
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27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
29 */ | 29 */ |
30 | 30 |
31 #include "core/editing/markers/DocumentMarker.h" | 31 #include "core/editing/markers/DocumentMarker.h" |
32 | 32 |
33 #include "platform/wtf/StdLibExtras.h" | 33 #include "platform/wtf/StdLibExtras.h" |
34 | 34 |
35 namespace blink { | 35 namespace blink { |
36 | 36 |
37 DocumentMarkerDetails::~DocumentMarkerDetails() {} | 37 DocumentMarker::~DocumentMarker() = default; |
38 | |
39 class DocumentMarkerDescription final : public DocumentMarkerDetails { | |
40 public: | |
41 static DocumentMarkerDescription* Create(const String&); | |
42 | |
43 const String& Description() const { return description_; } | |
44 bool IsDescription() const override { return true; } | |
45 | |
46 private: | |
47 explicit DocumentMarkerDescription(const String& description) | |
48 : description_(description) {} | |
49 | |
50 String description_; | |
51 }; | |
52 | |
53 DocumentMarkerDescription* DocumentMarkerDescription::Create( | |
54 const String& description) { | |
55 return new DocumentMarkerDescription(description); | |
56 } | |
57 | |
58 inline DocumentMarkerDescription* ToDocumentMarkerDescription( | |
59 DocumentMarkerDetails* details) { | |
60 if (details && details->IsDescription()) | |
61 return static_cast<DocumentMarkerDescription*>(details); | |
62 return 0; | |
63 } | |
64 | 38 |
65 DocumentMarker::DocumentMarker(MarkerType type, | 39 DocumentMarker::DocumentMarker(MarkerType type, |
66 unsigned start_offset, | 40 unsigned start_offset, |
67 unsigned end_offset) | 41 unsigned end_offset) |
68 : type_(type), start_offset_(start_offset), end_offset_(end_offset) { | 42 : type_(type), start_offset_(start_offset), end_offset_(end_offset) { |
69 DCHECK_LT(start_offset, end_offset); | 43 DCHECK_LT(start_offset_, end_offset_); |
Xiaocheng
2017/05/31 22:17:16
Redundant change.
| |
70 } | 44 } |
71 | 45 |
72 DocumentMarker::DocumentMarker(MarkerType type, | |
73 unsigned start_offset, | |
74 unsigned end_offset, | |
75 const String& description) | |
76 : type_(type), | |
77 start_offset_(start_offset), | |
78 end_offset_(end_offset), | |
79 details_(description.IsEmpty() | |
80 ? nullptr | |
81 : DocumentMarkerDescription::Create(description)) {} | |
82 | |
83 Optional<DocumentMarker::MarkerOffsets> | 46 Optional<DocumentMarker::MarkerOffsets> |
84 DocumentMarker::ComputeOffsetsAfterShift(unsigned offset, | 47 DocumentMarker::ComputeOffsetsAfterShift(unsigned offset, |
85 unsigned old_length, | 48 unsigned old_length, |
86 unsigned new_length) const { | 49 unsigned new_length) const { |
87 MarkerOffsets result; | 50 MarkerOffsets result; |
88 result.start_offset = StartOffset(); | 51 result.start_offset = StartOffset(); |
89 result.end_offset = EndOffset(); | 52 result.end_offset = EndOffset(); |
90 | 53 |
91 // algorithm inspired by https://dom.spec.whatwg.org/#concept-cd-replace | 54 // algorithm inspired by https://dom.spec.whatwg.org/#concept-cd-replace |
92 // but with some changes | 55 // but with some changes |
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124 return WTF::nullopt; | 87 return WTF::nullopt; |
125 | 88 |
126 return result; | 89 return result; |
127 } | 90 } |
128 | 91 |
129 void DocumentMarker::ShiftOffsets(int delta) { | 92 void DocumentMarker::ShiftOffsets(int delta) { |
130 start_offset_ += delta; | 93 start_offset_ += delta; |
131 end_offset_ += delta; | 94 end_offset_ += delta; |
132 } | 95 } |
133 | 96 |
134 const String& DocumentMarker::Description() const { | |
135 if (DocumentMarkerDescription* details = | |
136 ToDocumentMarkerDescription(details_.Get())) | |
137 return details->Description(); | |
138 return g_empty_string; | |
139 } | |
140 | |
141 DEFINE_TRACE(DocumentMarker) { | |
142 visitor->Trace(details_); | |
143 } | |
144 | |
145 } // namespace blink | 97 } // namespace blink |
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