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1 /* | |
yosin_UTC9
2015/04/21 01:59:52
nit: Let's use the short version of licence commen
mfomitchev
2015/04/21 18:44:25
Done - for all 3 new files.
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2 * Copyright 2015, Google 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 are | |
6 * met: | |
7 * | |
8 * * Redistributions of source code must retain the above copyright | |
9 * notice, this list of conditions and the following disclaimer. | |
10 * * Redistributions in binary form must reproduce the above | |
11 * copyright notice, this list of conditions and the following disclaimer | |
12 * in the documentation and/or other materials provided with the | |
13 * distribution. | |
14 * * Neither the name of Google Inc. nor the names of its | |
15 * contributors may be used to endorse or promote products derived from | |
16 * this software without specific prior written permission. | |
17 * | |
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
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. | |
29 */ | |
30 | |
31 #ifndef GranularityStrategy_h | |
32 #define GranularityStrategy_h | |
33 | |
34 #include "core/editing/SelectionStrategy.h" | |
35 #include "core/editing/VisibleSelection.h" | |
36 | |
37 namespace blink { | |
38 | |
39 class GranularityStrategy { | |
40 public: | |
41 virtual ~GranularityStrategy() { }; | |
yosin_UTC9
2015/04/21 01:59:52
Let's move inline virtual functions into .cpp file
mfomitchev
2015/04/21 18:44:25
Done.
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42 virtual SelectionStrategy GetType() const = 0; | |
43 virtual void Clear() = 0; | |
44 | |
45 // Calculates and returns the new selection based on the updated user select ion extent |extentPosition| and the granularity strategy. | |
46 virtual VisibleSelection updateExtent(const VisiblePosition& extentPosition, const VisibleSelection&) = 0; | |
47 protected: | |
48 GranularityStrategy() { }; | |
49 }; | |
50 | |
51 // Always uses character granularity. | |
52 class CharacterGranularityStrategy final : public GranularityStrategy { | |
53 public: | |
54 CharacterGranularityStrategy() { }; | |
55 ~CharacterGranularityStrategy() override { }; | |
yosin_UTC9
2015/04/21 01:59:52
nit: |final|.
This comment is applied rest of |ove
mfomitchev
2015/04/21 18:44:25
Done.
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56 | |
57 // GranularityStrategy: | |
58 SelectionStrategy GetType() const override { return StrategyCharacter; } | |
59 void Clear() override { }; | |
60 VisibleSelection updateExtent(const VisiblePosition& extentPosition, const V isibleSelection&) override; | |
61 }; | |
62 | |
63 // "Expand by word, shrink by character" selection strategy. | |
64 // Uses character granularity when selection is shrinking. If the selection is e xpanding, | |
65 // granularity doesn't change until a word boundary is passed, after which the g ranularity | |
66 // switches to "word". | |
67 class DirectionGranularityStrategy final : public GranularityStrategy { | |
68 public: | |
69 DirectionGranularityStrategy(); | |
70 ~DirectionGranularityStrategy() override { }; | |
71 | |
72 // GranularityStrategy: | |
73 SelectionStrategy GetType() const override { return StrategyDirection; } | |
74 void Clear() override; | |
75 VisibleSelection updateExtent(const VisiblePosition&, const VisibleSelection &) override; | |
76 private: | |
77 enum class EBoundAdjust {CurrentPosIfOnBound, NextBoundIfOnBound}; | |
yosin_UTC9
2015/04/21 01:59:52
I think we don't need to have prefix "E". Since, t
mfomitchev
2015/04/21 18:44:25
Done.
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78 enum class ESearchDirection {SearchBackwards, SearchForward}; | |
79 | |
80 // Returns the next word boundary starting from |pos|. |direction| specifies the direction | |
81 // in which to search for the next bound. nextIfOnBound controls whether |po s| or the next boundary | |
82 // is returned when |pos| is located exactly on word boundary. | |
83 VisiblePosition nextWordBound(const VisiblePosition& /*pos*/, ESearchDirecti on /*direction*/, EBoundAdjust /*nextIfOnBound*/); | |
84 | |
85 // Current selection granularity being used | |
86 TextGranularity m_granularity; | |
87 // Set to true if the selection was shrunk (without changing relative base/e xtent order) | |
88 // as a result of the most recent updateExtent call. | |
89 bool m_lastMoveShrunkSelection; | |
90 }; | |
91 | |
92 } // namespace blink | |
93 | |
94 #endif // GranularityStrategy_h | |
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