blob: 0dca37870e5ed3c2fc8e4a6645db78ed1db7742b [file] [log] [blame]
// 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/bind.h"
#include "base/logging.h"
#include "base/message_loop/message_loop.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"
#include "ui/base/ime/text_input_focus_manager.h"
#include "ui/base/ui_base_switches_util.h"
#include "ui/events/event.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)
return;
SetFocusedTextInputClientInternal(NULL);
}
TextInputClient* InputMethodBase::GetTextInputClient() const {
if (switches::IsTextInputFocusManagerEnabled())
return TextInputFocusManager::GetInstance()->GetFocusedTextInputClient();
return system_toplevel_window_focused_ ? text_input_client_ : NULL;
}
void InputMethodBase::OnTextInputTypeChanged(const TextInputClient* client) {
if (!IsTextInputClientFocused(client))
return;
NotifyTextInputStateChanged(client);
}
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;
}
int InputMethodBase::GetTextInputFlags() const {
TextInputClient* client = GetTextInputClient();
return client ? client->GetTextInputFlags() : 0;
}
bool InputMethodBase::CanComposeInline() const {
TextInputClient* client = GetTextInputClient();
return client ? client->CanComposeInline() : true;
}
void InputMethodBase::ShowImeIfNeeded() {
FOR_EACH_OBSERVER(InputMethodObserver, observer_list_, OnShowImeIfNeeded());
}
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 ui::KeyEvent& event) const {
if (!delegate_)
return false;
return delegate_->DispatchKeyEventPostIME(event);
}
void InputMethodBase::NotifyTextInputStateChanged(
const TextInputClient* client) {
FOR_EACH_OBSERVER(InputMethodObserver,
observer_list_,
OnTextInputStateChanged(client));
}
void InputMethodBase::NotifyTextInputCaretBoundsChanged(
const TextInputClient* client) {
FOR_EACH_OBSERVER(
InputMethodObserver, observer_list_, OnCaretBoundsChanged(client));
}
void InputMethodBase::SetFocusedTextInputClientInternal(
TextInputClient* client) {
if (switches::IsTextInputFocusManagerEnabled())
return;
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_);
}
void InputMethodBase::OnCandidateWindowShown() {
base::MessageLoop::current()->PostTask(
FROM_HERE,
base::Bind(&InputMethodBase::CandidateWindowShownCallback, AsWeakPtr()));
}
void InputMethodBase::OnCandidateWindowUpdated() {
base::MessageLoop::current()->PostTask(
FROM_HERE,
base::Bind(&InputMethodBase::CandidateWindowUpdatedCallback,
AsWeakPtr()));
}
void InputMethodBase::OnCandidateWindowHidden() {
base::MessageLoop::current()->PostTask(
FROM_HERE,
base::Bind(&InputMethodBase::CandidateWindowHiddenCallback, AsWeakPtr()));
}
void InputMethodBase::CandidateWindowShownCallback() {
if (TextInputClient* text_input_client = GetTextInputClient())
text_input_client->OnCandidateWindowShown();
}
void InputMethodBase::CandidateWindowUpdatedCallback() {
if (TextInputClient* text_input_client = GetTextInputClient())
text_input_client->OnCandidateWindowUpdated();
}
void InputMethodBase::CandidateWindowHiddenCallback() {
if (TextInputClient* text_input_client = GetTextInputClient())
text_input_client->OnCandidateWindowHidden();
}
} // namespace ui