Use input method to control visibility of virtual keyboard

views/ime/input_method.cc

+// Copyright (c) 2011 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.
+
+#include "views/ime/input_method.h"
+
+#include <algorithm>
+
+#include "base/logging.h"
+
+namespace views {
+

[Peng, 2011/06/21 15:42:53]

Hi Suzhe, I added some functions into InputMethod interface. And I am also
thinking if we could merge InputMethodBase into InputMethod too. Looks all input
method implementation will inherit from InputMethodBase.

+void InputMethod::AddTextInputTypeChangedListener(
+    TextInputTypeChangedListener* listener) {
+  DCHECK(std::find(text_input_type_changed_listeners_.begin(),
+                   text_input_type_changed_listeners_.end(), listener) ==
+      text_input_type_changed_listeners_.end()) << "Adding a listener twice.";
+  text_input_type_changed_listeners_.push_back(listener);
+}
+
+void InputMethod::RemoveTextInputTypeChangedListener(
+    TextInputTypeChangedListener* listener) {
+  TextInputTypeChangedListenerList::iterator place =
+      std::find(text_input_type_changed_listeners_.begin(),
+                text_input_type_changed_listeners_.end(),
+                listener);
+  if (place == text_input_type_changed_listeners_.end()) {
+    NOTREACHED() << "Removing a listener that isn't registered.";
+    return;
+  }
+  text_input_type_changed_listeners_.erase(place);
+}
+
+void InputMethod::TextInputTypeChanged(View *view) {
+  TextInputTypeChangedListenerList::const_iterator iter;
+  for (iter = text_input_type_changed_listeners_.begin();
+       iter != text_input_type_changed_listeners_.end(); ++iter) {
+    (*iter)->TextInputTypeChanged(view, GetTextInputType());
+  }
+}
+
+}  // namespace views