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// Copyright (c) 2012 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 "ui/base/ime/input_method_base.h"
#include "base/logging.h"
#include "ui/base/ime/input_method_delegate.h"
#include "ui/base/ime/input_method_observer.h"
#include "ui/base/ime/text_input_client.h"
namespace ui {
InputMethodBase::InputMethodBase()
: delegate_(NULL),
text_input_client_(NULL),
system_toplevel_window_focused_(false) {
}
InputMethodBase::~InputMethodBase() {
FOR_EACH_OBSERVER(InputMethodObserver,
observer_list_,
OnInputMethodDestroyed(this));
}
void InputMethodBase::SetDelegate(internal::InputMethodDelegate* delegate) {
delegate_ = delegate;
}
void InputMethodBase::Init(bool focused) {
if (focused)
OnFocus();
}
void InputMethodBase::OnFocus() {
DCHECK(!system_toplevel_window_focused_);
system_toplevel_window_focused_ = true;
}
void InputMethodBase::OnBlur() {
DCHECK(system_toplevel_window_focused_);
system_toplevel_window_focused_ = false;
}
void InputMethodBase::SetFocusedTextInputClient(TextInputClient* client) {
SetFocusedTextInputClientInternal(client);
}
void InputMethodBase::DetachTextInputClient(TextInputClient* client) {
if (text_input_client_ == client) {
OnWillChangeFocusedClient(client, NULL);
text_input_client_ = NULL;
OnDidChangeFocusedClient(client, NULL);
NotifyTextInputStateChanged(text_input_client_);
}
}
TextInputClient* InputMethodBase::GetTextInputClient() const {
return system_toplevel_window_focused_ ? text_input_client_ : NULL;
}
void InputMethodBase::OnTextInputTypeChanged(const TextInputClient* client) {
if (!IsTextInputClientFocused(client))
return;
NotifyTextInputStateChanged(client);
}
void InputMethodBase::OnCaretBoundsChanged(const TextInputClient* client) {
if (!IsTextInputClientFocused(client))
return;
FOR_EACH_OBSERVER(InputMethodObserver,
observer_list_,
OnCaretBoundsChanged(client));
}
void InputMethodBase::OnInputLocaleChanged() {
FOR_EACH_OBSERVER(InputMethodObserver,
observer_list_,
OnInputLocaleChanged());
}
TextInputType InputMethodBase::GetTextInputType() const {
TextInputClient* client = GetTextInputClient();
return client ? client->GetTextInputType() : TEXT_INPUT_TYPE_NONE;
}
TextInputMode InputMethodBase::GetTextInputMode() const {
TextInputClient* client = GetTextInputClient();
return client ? client->GetTextInputMode() : TEXT_INPUT_MODE_DEFAULT;
}
bool InputMethodBase::CanComposeInline() const {
TextInputClient* client = GetTextInputClient();
return client ? client->CanComposeInline() : true;
}
void InputMethodBase::AddObserver(InputMethodObserver* observer) {
observer_list_.AddObserver(observer);
}
void InputMethodBase::RemoveObserver(InputMethodObserver* observer) {
observer_list_.RemoveObserver(observer);
}
bool InputMethodBase::IsTextInputClientFocused(const TextInputClient* client) {
return client && (client == GetTextInputClient());
}
bool InputMethodBase::IsTextInputTypeNone() const {
return GetTextInputType() == TEXT_INPUT_TYPE_NONE;
}
void InputMethodBase::OnInputMethodChanged() const {
TextInputClient* client = GetTextInputClient();
if (!IsTextInputTypeNone())
client->OnInputMethodChanged();
}
bool InputMethodBase::DispatchKeyEventPostIME(
const base::NativeEvent& native_event) const {
return delegate_ ? delegate_->DispatchKeyEventPostIME(native_event) : false;
}
bool InputMethodBase::DispatchFabricatedKeyEventPostIME(EventType type,
KeyboardCode key_code,
int flags) const {
return delegate_ ? delegate_->DispatchFabricatedKeyEventPostIME
(type, key_code, flags) : false;
}
void InputMethodBase::NotifyTextInputStateChanged(
const TextInputClient* client) {
FOR_EACH_OBSERVER(InputMethodObserver,
observer_list_,
OnTextInputStateChanged(client));
}
void InputMethodBase::SetFocusedTextInputClientInternal(
TextInputClient* client) {
TextInputClient* old = text_input_client_;
if (old == client)
return;
OnWillChangeFocusedClient(old, client);
text_input_client_ = client; // NULL allowed.
OnDidChangeFocusedClient(old, client);
NotifyTextInputStateChanged(text_input_client_);
}
} // namespace ui
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