1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef UI_BASE_IME_INPUT_METHOD_CHROMEOS_H_
#define UI_BASE_IME_INPUT_METHOD_CHROMEOS_H_
#include <set>
#include <string>
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/weak_ptr.h"
#include "ui/base/ime/chromeos/character_composer.h"
#include "ui/base/ime/chromeos/ime_bridge.h"
#include "ui/base/ime/composition_text.h"
#include "ui/base/ime/input_method_base.h"
namespace ui {
// A ui::InputMethod implementation based on IBus.
class UI_BASE_EXPORT InputMethodChromeOS
: public InputMethodBase,
public chromeos::IMEInputContextHandlerInterface {
public:
explicit InputMethodChromeOS(internal::InputMethodDelegate* delegate);
virtual ~InputMethodChromeOS();
// Overridden from InputMethod:
virtual void OnFocus() OVERRIDE;
virtual void OnBlur() OVERRIDE;
virtual bool OnUntranslatedIMEMessage(const base::NativeEvent& event,
NativeEventResult* result) OVERRIDE;
virtual bool DispatchKeyEvent(const ui::KeyEvent& event) OVERRIDE;
virtual void OnTextInputTypeChanged(const TextInputClient* client) OVERRIDE;
virtual void OnCaretBoundsChanged(const TextInputClient* client) OVERRIDE;
virtual void CancelComposition(const TextInputClient* client) OVERRIDE;
virtual void OnInputLocaleChanged() OVERRIDE;
virtual std::string GetInputLocale() OVERRIDE;
virtual bool IsActive() OVERRIDE;
virtual bool IsCandidatePopupOpen() const OVERRIDE;
protected:
// Converts |text| into CompositionText.
void ExtractCompositionText(const chromeos::CompositionText& text,
uint32 cursor_position,
CompositionText* out_composition) const;
// Process a key returned from the input method.
virtual void ProcessKeyEventPostIME(const ui::KeyEvent& event,
bool handled);
// Resets context and abandon all pending results and key events.
void ResetContext();
private:
class PendingKeyEvent;
// Overridden from InputMethodBase:
virtual void OnWillChangeFocusedClient(TextInputClient* focused_before,
TextInputClient* focused) OVERRIDE;
virtual void OnDidChangeFocusedClient(TextInputClient* focused_before,
TextInputClient* focused) OVERRIDE;
// Asks the client to confirm current composition text.
void ConfirmCompositionText();
// Checks the availability of focused text input client and update focus
// state.
void UpdateContextFocusState();
// Processes a key event that was already filtered by the input method.
// A VKEY_PROCESSKEY may be dispatched to the focused View.
void ProcessFilteredKeyPressEvent(const ui::KeyEvent& event);
// Processes a key event that was not filtered by the input method.
void ProcessUnfilteredKeyPressEvent(const ui::KeyEvent& event);
// Sends input method result caused by the given key event to the focused text
// input client.
void ProcessInputMethodResult(const ui::KeyEvent& event, bool filtered);
// Checks if the pending input method result needs inserting into the focused
// text input client as a single character.
bool NeedInsertChar() const;
// Checks if there is pending input method result.
bool HasInputMethodResult() const;
// Abandons all pending key events. It usually happends when we lose keyboard
// focus, the text input type is changed or we are destroyed.
void AbandonAllPendingKeyEvents();
// Passes keyevent and executes character composition if necessary. Returns
// true if character composer comsumes key event.
bool ExecuteCharacterComposer(const ui::KeyEvent& event);
// chromeos::IMEInputContextHandlerInterface overrides:
virtual void CommitText(const std::string& text) OVERRIDE;
virtual void UpdateCompositionText(const chromeos::CompositionText& text,
uint32 cursor_pos,
bool visible) OVERRIDE;
virtual void DeleteSurroundingText(int32 offset, uint32 length) OVERRIDE;
// Hides the composition text.
void HidePreeditText();
// Callback function for IMEEngineHandlerInterface::ProcessKeyEvent.
void ProcessKeyEventDone(uint32 id, ui::KeyEvent* event, bool is_handled);
// Returns whether an input field is focused. Note that password field is not
// considered as an input field.
bool IsInputFieldFocused();
// All pending key events. Note: we do not own these object, we just save
// pointers to these object so that we can abandon them when necessary.
// They will be deleted in ProcessKeyEventDone().
std::set<uint32> pending_key_events_;
// Pending composition text generated by the current pending key event.
// It'll be sent to the focused text input client as soon as we receive the
// processing result of the pending key event.
CompositionText composition_;
// Pending result text generated by the current pending key event.
// It'll be sent to the focused text input client as soon as we receive the
// processing result of the pending key event.
base::string16 result_text_;
base::string16 previous_surrounding_text_;
gfx::Range previous_selection_range_;
// Indicates if there is an ongoing composition text.
bool composing_text_;
// Indicates if the composition text is changed or deleted.
bool composition_changed_;
// The latest id of key event.
uint32 current_keyevent_id_;
// An object to compose a character from a sequence of key presses
// including dead key etc.
CharacterComposer character_composer_;
TextInputType previous_textinput_type_;
// Used for making callbacks.
base::WeakPtrFactory<InputMethodChromeOS> weak_ptr_factory_;
DISALLOW_COPY_AND_ASSIGN(InputMethodChromeOS);
};
} // namespace ui
#endif // UI_BASE_IME_INPUT_METHOD_CHROMEOS_H_
|
