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.
5 #ifndef UI_BASE_IME_WIN_TSF_EVENT_ROUTER_H_
6 #define UI_BASE_IME_WIN_TSF_EVENT_ROUTER_H_
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_export.h"
19 #include "ui/gfx/range/range.h"
21 struct ITfDocumentMgr;
25 class TSFEventRouterObserver {
27 TSFEventRouterObserver() {}
29 // Called when the number of currently opened candidate windows changes.
30 virtual void OnCandidateWindowCountChanged(size_t window_count) {}
32 // Called when a composition is started.
33 virtual void OnTSFStartComposition() {}
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) {}
39 // Called when a composition is terminated.
40 virtual void OnTSFEndComposition() {}
43 virtual ~TSFEventRouterObserver() {}
46 DISALLOW_COPY_AND_ASSIGN(TSFEventRouterObserver);
49 // This class monitores TSF related events and forwards them to given
51 class UI_EXPORT TSFEventRouter {
53 // Do not pass NULL to |observer|.
54 explicit TSFEventRouter(TSFEventRouterObserver* observer);
55 virtual ~TSFEventRouter();
57 // Returns true if the IME is composing text.
58 bool IsImeComposing();
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();
66 // Sets |thread_manager| to be monitored. |thread_manager| can be NULL.
67 void SetManager(ITfThreadMgr* thread_manager);
72 CComPtr<Delegate> delegate_;
74 TSFEventRouterObserver* observer_;
76 DISALLOW_COPY_AND_ASSIGN(TSFEventRouter);
81 #endif // UI_BASE_IME_WIN_TSF_EVENT_ROUTER_H_