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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef UI_BASE_IME_WIN_TSF_EVENT_ROUTER_H_ | |
6 #define UI_BASE_IME_WIN_TSF_EVENT_ROUTER_H_ | |
7 | |
8 #include <atlbase.h> | |
9 #include <atlcom.h> | |
10 #include <msctf.h> | |
11 | |
12 #include <set> | |
13 | |
14 #include "base/basictypes.h" | |
15 #include "base/callback.h" | |
16 #include "base/compiler_specific.h" | |
17 #include "ui/base/ime/text_input_type.h" | |
18 #include "ui/base/ui_base_export.h" | |
19 #include "ui/gfx/range/range.h" | |
20 | |
21 struct ITfDocumentMgr; | |
22 | |
23 namespace ui { | |
24 | |
25 class TSFEventRouterObserver { | |
26 public: | |
27 TSFEventRouterObserver() {} | |
28 | |
29 // Called when the number of currently opened candidate windows changes. | |
30 virtual void OnCandidateWindowCountChanged(size_t window_count) {} | |
31 | |
32 // Called when a composition is started. | |
33 virtual void OnTSFStartComposition() {} | |
34 | |
35 // Called when the text contents are updated. If there is no composition, | |
36 // gfx::Range::InvalidRange is passed to |composition_range|. | |
37 virtual void OnTextUpdated(const gfx::Range& composition_range) {} | |
38 | |
39 // Called when a composition is terminated. | |
40 virtual void OnTSFEndComposition() {} | |
41 | |
42 protected: | |
43 virtual ~TSFEventRouterObserver() {} | |
44 | |
45 private: | |
46 DISALLOW_COPY_AND_ASSIGN(TSFEventRouterObserver); | |
47 }; | |
48 | |
49 // This class monitores TSF related events and forwards them to given | |
50 // |observer|. | |
51 class UI_BASE_EXPORT TSFEventRouter { | |
52 public: | |
53 // Do not pass NULL to |observer|. | |
54 explicit TSFEventRouter(TSFEventRouterObserver* observer); | |
55 virtual ~TSFEventRouter(); | |
56 | |
57 // Returns true if the IME is composing text. | |
58 bool IsImeComposing(); | |
59 | |
60 // Callbacks from the TSFEventRouterDelegate: | |
61 void OnCandidateWindowCountChanged(size_t window_count); | |
62 void OnTSFStartComposition(); | |
63 void OnTextUpdated(const gfx::Range& composition_range); | |
64 void OnTSFEndComposition(); | |
65 | |
66 // Sets |thread_manager| to be monitored. |thread_manager| can be NULL. | |
67 void SetManager(ITfThreadMgr* thread_manager); | |
68 | |
69 private: | |
70 class Delegate; | |
71 | |
72 CComPtr<Delegate> delegate_; | |
73 | |
74 TSFEventRouterObserver* observer_; | |
75 | |
76 DISALLOW_COPY_AND_ASSIGN(TSFEventRouter); | |
77 }; | |
78 | |
79 } // namespace ui | |
80 | |
81 #endif // UI_BASE_IME_WIN_TSF_EVENT_ROUTER_H_ | |
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