ui/base/ime/input_method_base.cc

   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/events/event.h"
  14
  15 namespace ui {
  16
  17 InputMethodBase::InputMethodBase()
  18   : delegate_(NULL),
  19     text_input_client_(NULL),
  20     system_toplevel_window_focused_(false) {
  21 }
  22
  23 InputMethodBase::~InputMethodBase() {
  24   FOR_EACH_OBSERVER(InputMethodObserver,
  25                     observer_list_,
  26                     OnInputMethodDestroyed(this));
  27 }
  28
  29 void InputMethodBase::SetDelegate(internal::InputMethodDelegate* delegate) {
  30   delegate_ = delegate;
  31 }
  32
  33 void InputMethodBase::OnFocus() {
  34   system_toplevel_window_focused_ = true;
  35 }
  36
  37 void InputMethodBase::OnBlur() {
  38   system_toplevel_window_focused_ = false;
  39 }
  40
  41 void InputMethodBase::SetFocusedTextInputClient(TextInputClient* client) {
  42   SetFocusedTextInputClientInternal(client);
  43 }
  44
  45 void InputMethodBase::DetachTextInputClient(TextInputClient* client) {
  46   if (text_input_client_ != client)
  47     return;
  48   SetFocusedTextInputClientInternal(NULL);
  49 }
  50
  51 TextInputClient* InputMethodBase::GetTextInputClient() const {
  52   return system_toplevel_window_focused_ ? text_input_client_ : NULL;
  53 }
  54
  55 void InputMethodBase::OnTextInputTypeChanged(const TextInputClient* client) {
  56   if (!IsTextInputClientFocused(client))
  57     return;
  58   NotifyTextInputStateChanged(client);
  59 }
  60
  61 TextInputType InputMethodBase::GetTextInputType() const {
  62   TextInputClient* client = GetTextInputClient();
  63   return client ? client->GetTextInputType() : TEXT_INPUT_TYPE_NONE;
  64 }
  65
  66 TextInputMode InputMethodBase::GetTextInputMode() const {
  67   TextInputClient* client = GetTextInputClient();
  68   return client ? client->GetTextInputMode() : TEXT_INPUT_MODE_DEFAULT;
  69 }
  70
  71 int InputMethodBase::GetTextInputFlags() const {
  72   TextInputClient* client = GetTextInputClient();
  73   return client ? client->GetTextInputFlags() : 0;
  74 }
  75
  76 bool InputMethodBase::CanComposeInline() const {
  77   TextInputClient* client = GetTextInputClient();
  78   return client ? client->CanComposeInline() : true;
  79 }
  80
  81 void InputMethodBase::ShowImeIfNeeded() {
  82   FOR_EACH_OBSERVER(InputMethodObserver, observer_list_, OnShowImeIfNeeded());
  83 }
  84
  85 void InputMethodBase::AddObserver(InputMethodObserver* observer) {
  86   observer_list_.AddObserver(observer);
  87 }
  88
  89 void InputMethodBase::RemoveObserver(InputMethodObserver* observer) {
  90   observer_list_.RemoveObserver(observer);
  91 }
  92
  93 bool InputMethodBase::IsTextInputClientFocused(const TextInputClient* client) {
  94   return client && (client == GetTextInputClient());
  95 }
  96
  97 bool InputMethodBase::IsTextInputTypeNone() const {
  98   return GetTextInputType() == TEXT_INPUT_TYPE_NONE;
  99 }
 100
 101 void InputMethodBase::OnInputMethodChanged() const {
 102   TextInputClient* client = GetTextInputClient();
 103   if (!IsTextInputTypeNone())
 104     client->OnInputMethodChanged();
 105 }
 106
 107 bool InputMethodBase::DispatchKeyEventPostIME(
 108     const ui::KeyEvent& event) const {
 109   if (!delegate_)
 110     return false;
 111
 112   return delegate_->DispatchKeyEventPostIME(event);
 113 }
 114
 115 void InputMethodBase::NotifyTextInputStateChanged(
 116     const TextInputClient* client) {
 117   FOR_EACH_OBSERVER(InputMethodObserver,
 118                     observer_list_,
 119                     OnTextInputStateChanged(client));
 120 }
 121
 122 void InputMethodBase::NotifyTextInputCaretBoundsChanged(
 123     const TextInputClient* client) {
 124   FOR_EACH_OBSERVER(
 125       InputMethodObserver, observer_list_, OnCaretBoundsChanged(client));
 126 }
 127
 128 void InputMethodBase::SetFocusedTextInputClientInternal(
 129     TextInputClient* client) {
 130   TextInputClient* old = text_input_client_;
 131   if (old == client)
 132     return;
 133   OnWillChangeFocusedClient(old, client);
 134   text_input_client_ = client;  // NULL allowed.
 135   OnDidChangeFocusedClient(old, client);
 136   NotifyTextInputStateChanged(text_input_client_);
 137 }
 138
 139 }  // namespace ui