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 #include "ui/base/ime/input_method_base.h"
6
7 #include "base/bind.h"
8 #include "base/logging.h"
9 #include "base/message_loop/message_loop.h"
10 #include "ui/base/ime/input_method_delegate.h"
11 #include "ui/base/ime/input_method_observer.h"
12 #include "ui/base/ime/text_input_client.h"
13 #include "ui/base/ime/text_input_focus_manager.h"
14 #include "ui/base/ui_base_switches_util.h"
15 #include "ui/events/event.h"
16
17 namespace ui {
18
InputMethodBase()19 InputMethodBase::InputMethodBase()
20 : delegate_(NULL),
21 text_input_client_(NULL),
22 system_toplevel_window_focused_(false) {
23 }
24
~InputMethodBase()25 InputMethodBase::~InputMethodBase() {
26 FOR_EACH_OBSERVER(InputMethodObserver,
27 observer_list_,
28 OnInputMethodDestroyed(this));
29 }
30
SetDelegate(internal::InputMethodDelegate * delegate)31 void InputMethodBase::SetDelegate(internal::InputMethodDelegate* delegate) {
32 delegate_ = delegate;
33 }
34
Init(bool focused)35 void InputMethodBase::Init(bool focused) {
36 if (focused)
37 OnFocus();
38 }
39
OnFocus()40 void InputMethodBase::OnFocus() {
41 DCHECK(!system_toplevel_window_focused_);
42 system_toplevel_window_focused_ = true;
43 }
44
OnBlur()45 void InputMethodBase::OnBlur() {
46 DCHECK(system_toplevel_window_focused_);
47 system_toplevel_window_focused_ = false;
48 }
49
SetFocusedTextInputClient(TextInputClient * client)50 void InputMethodBase::SetFocusedTextInputClient(TextInputClient* client) {
51 SetFocusedTextInputClientInternal(client);
52 }
53
DetachTextInputClient(TextInputClient * client)54 void InputMethodBase::DetachTextInputClient(TextInputClient* client) {
55 if (text_input_client_ != client)
56 return;
57 SetFocusedTextInputClientInternal(NULL);
58 }
59
GetTextInputClient() const60 TextInputClient* InputMethodBase::GetTextInputClient() const {
61 if (switches::IsTextInputFocusManagerEnabled())
62 return TextInputFocusManager::GetInstance()->GetFocusedTextInputClient();
63
64 return system_toplevel_window_focused_ ? text_input_client_ : NULL;
65 }
66
OnTextInputTypeChanged(const TextInputClient * client)67 void InputMethodBase::OnTextInputTypeChanged(const TextInputClient* client) {
68 if (!IsTextInputClientFocused(client))
69 return;
70 NotifyTextInputStateChanged(client);
71 }
72
GetTextInputType() const73 TextInputType InputMethodBase::GetTextInputType() const {
74 TextInputClient* client = GetTextInputClient();
75 return client ? client->GetTextInputType() : TEXT_INPUT_TYPE_NONE;
76 }
77
GetTextInputMode() const78 TextInputMode InputMethodBase::GetTextInputMode() const {
79 TextInputClient* client = GetTextInputClient();
80 return client ? client->GetTextInputMode() : TEXT_INPUT_MODE_DEFAULT;
81 }
82
CanComposeInline() const83 bool InputMethodBase::CanComposeInline() const {
84 TextInputClient* client = GetTextInputClient();
85 return client ? client->CanComposeInline() : true;
86 }
87
ShowImeIfNeeded()88 void InputMethodBase::ShowImeIfNeeded() {
89 FOR_EACH_OBSERVER(InputMethodObserver, observer_list_, OnShowImeIfNeeded());
90 }
91
AddObserver(InputMethodObserver * observer)92 void InputMethodBase::AddObserver(InputMethodObserver* observer) {
93 observer_list_.AddObserver(observer);
94 }
95
RemoveObserver(InputMethodObserver * observer)96 void InputMethodBase::RemoveObserver(InputMethodObserver* observer) {
97 observer_list_.RemoveObserver(observer);
98 }
99
IsTextInputClientFocused(const TextInputClient * client)100 bool InputMethodBase::IsTextInputClientFocused(const TextInputClient* client) {
101 return client && (client == GetTextInputClient());
102 }
103
IsTextInputTypeNone() const104 bool InputMethodBase::IsTextInputTypeNone() const {
105 return GetTextInputType() == TEXT_INPUT_TYPE_NONE;
106 }
107
OnInputMethodChanged() const108 void InputMethodBase::OnInputMethodChanged() const {
109 TextInputClient* client = GetTextInputClient();
110 if (!IsTextInputTypeNone())
111 client->OnInputMethodChanged();
112 }
113
DispatchKeyEventPostIME(const ui::KeyEvent & event) const114 bool InputMethodBase::DispatchKeyEventPostIME(
115 const ui::KeyEvent& event) const {
116 if (!delegate_)
117 return false;
118
119 return delegate_->DispatchKeyEventPostIME(event);
120 }
121
NotifyTextInputStateChanged(const TextInputClient * client)122 void InputMethodBase::NotifyTextInputStateChanged(
123 const TextInputClient* client) {
124 FOR_EACH_OBSERVER(InputMethodObserver,
125 observer_list_,
126 OnTextInputStateChanged(client));
127 }
128
SetFocusedTextInputClientInternal(TextInputClient * client)129 void InputMethodBase::SetFocusedTextInputClientInternal(
130 TextInputClient* client) {
131 if (switches::IsTextInputFocusManagerEnabled())
132 return;
133
134 TextInputClient* old = text_input_client_;
135 if (old == client)
136 return;
137 OnWillChangeFocusedClient(old, client);
138 text_input_client_ = client; // NULL allowed.
139 OnDidChangeFocusedClient(old, client);
140 NotifyTextInputStateChanged(text_input_client_);
141 }
142
OnCandidateWindowShown()143 void InputMethodBase::OnCandidateWindowShown() {
144 base::MessageLoop::current()->PostTask(
145 FROM_HERE,
146 base::Bind(&InputMethodBase::CandidateWindowShownCallback, AsWeakPtr()));
147 }
148
OnCandidateWindowUpdated()149 void InputMethodBase::OnCandidateWindowUpdated() {
150 base::MessageLoop::current()->PostTask(
151 FROM_HERE,
152 base::Bind(&InputMethodBase::CandidateWindowUpdatedCallback,
153 AsWeakPtr()));
154 }
155
OnCandidateWindowHidden()156 void InputMethodBase::OnCandidateWindowHidden() {
157 base::MessageLoop::current()->PostTask(
158 FROM_HERE,
159 base::Bind(&InputMethodBase::CandidateWindowHiddenCallback, AsWeakPtr()));
160 }
161
CandidateWindowShownCallback()162 void InputMethodBase::CandidateWindowShownCallback() {
163 if (TextInputClient* text_input_client = GetTextInputClient())
164 text_input_client->OnCandidateWindowShown();
165 }
166
CandidateWindowUpdatedCallback()167 void InputMethodBase::CandidateWindowUpdatedCallback() {
168 if (TextInputClient* text_input_client = GetTextInputClient())
169 text_input_client->OnCandidateWindowUpdated();
170 }
171
CandidateWindowHiddenCallback()172 void InputMethodBase::CandidateWindowHiddenCallback() {
173 if (TextInputClient* text_input_client = GetTextInputClient())
174 text_input_client->OnCandidateWindowHidden();
175 }
176
177 } // namespace ui
178