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// Copyright (c) 2013 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_tsf.h"
#include "ui/base/ime/text_input_client.h"
#include "ui/base/ime/win/tsf_bridge.h"
#include "ui/base/ime/win/tsf_event_router.h"
namespace ui {
class InputMethodTSF::TSFEventObserver : public TSFEventRouterObserver {
public:
TSFEventObserver() : is_candidate_popup_open_(false) {}
// Returns true if we know for sure that a candidate window (or IME suggest,
// etc.) is open.
bool IsCandidatePopupOpen() const { return is_candidate_popup_open_; }
// Overridden from TSFEventRouterObserver:
virtual void OnCandidateWindowCountChanged(size_t window_count) OVERRIDE {
is_candidate_popup_open_ = (window_count != 0);
}
private:
// True if we know for sure that a candidate window is open.
bool is_candidate_popup_open_;
DISALLOW_COPY_AND_ASSIGN(TSFEventObserver);
};
InputMethodTSF::InputMethodTSF(internal::InputMethodDelegate* delegate,
HWND toplevel_window_handle)
: InputMethodWin(delegate, toplevel_window_handle),
tsf_event_observer_(new TSFEventObserver()),
tsf_event_router_(new TSFEventRouter(tsf_event_observer_.get())) {
// In non-Aura environment, appropriate callbacks to OnFocus() and OnBlur()
// are not implemented yet. To work around this limitation, here we use
// "always focused" model.
// TODO(ime): Fix the caller of OnFocus() and OnBlur() so that appropriate
// focus event will be passed.
InputMethodWin::OnFocus();
}
InputMethodTSF::~InputMethodTSF() {}
void InputMethodTSF::OnFocus() {
// Do not call baseclass' OnFocus() and discard the event being in
// "always focused" model. See the comment in the constructor.
// TODO(ime): Implement OnFocus once the callers are fixed.
tsf_event_router_->SetManager(
ui::TSFBridge::GetInstance()->GetThreadManager());
}
void InputMethodTSF::OnBlur() {
// Do not call baseclass' OnBlur() and discard the event being in
// "always focused" model. See the comment in the constructor.
// TODO(ime): Implement OnFocus once the callers are fixed.
tsf_event_router_->SetManager(NULL);
}
bool InputMethodTSF::OnUntranslatedIMEMessage(
const base::NativeEvent& event, InputMethod::NativeEventResult* result) {
LRESULT original_result = 0;
BOOL handled = FALSE;
// Even when TSF is enabled, following IMM32/Win32 messages must be handled.
switch (event.message) {
case WM_IME_REQUEST:
// Some TSF-native TIPs (Text Input Processors) such as ATOK and Mozc
// still rely on WM_IME_REQUEST message to implement reverse conversion.
original_result = OnImeRequest(
event.message, event.wParam, event.lParam, &handled);
break;
case WM_CHAR:
case WM_SYSCHAR:
// ui::InputMethod interface is responsible for handling Win32 character
// messages. For instance, we will be here in the following cases.
// - TIP is not activated. (e.g, the current language profile is English)
// - TIP does not handle and WM_KEYDOWN and WM_KEYDOWN is translated into
// WM_CHAR by TranslateMessage API. (e.g, TIP is turned off)
// - Another application sends WM_CHAR through SendMessage API.
original_result = OnChar(
event.hwnd, event.message, event.wParam, event.lParam, &handled);
break;
case WM_DEADCHAR:
case WM_SYSDEADCHAR:
// See the comment in WM_CHAR/WM_SYSCHAR.
original_result = OnDeadChar(
event.message, event.wParam, event.lParam, &handled);
break;
}
if (result)
*result = original_result;
return !!handled;
}
void InputMethodTSF::OnTextInputTypeChanged(const TextInputClient* client) {
if (IsTextInputClientFocused(client) && IsWindowFocused(client)) {
ui::TSFBridge::GetInstance()->CancelComposition();
ui::TSFBridge::GetInstance()->OnTextInputTypeChanged(client);
}
InputMethodWin::OnTextInputTypeChanged(client);
}
void InputMethodTSF::OnCaretBoundsChanged(const TextInputClient* client) {
if (IsTextInputClientFocused(client) && IsWindowFocused(client))
ui::TSFBridge::GetInstance()->OnTextLayoutChanged();
}
void InputMethodTSF::CancelComposition(const TextInputClient* client) {
if (IsTextInputClientFocused(client) && IsWindowFocused(client))
ui::TSFBridge::GetInstance()->CancelComposition();
}
void InputMethodTSF::DetachTextInputClient(TextInputClient* client) {
InputMethodWin::DetachTextInputClient(client);
ui::TSFBridge::GetInstance()->RemoveFocusedClient(client);
}
bool InputMethodTSF::IsCandidatePopupOpen() const {
return tsf_event_observer_->IsCandidatePopupOpen();
}
void InputMethodTSF::OnWillChangeFocusedClient(TextInputClient* focused_before,
TextInputClient* focused) {
if (IsWindowFocused(focused_before)) {
ConfirmCompositionText();
ui::TSFBridge::GetInstance()->RemoveFocusedClient(focused_before);
}
}
void InputMethodTSF::OnDidChangeFocusedClient(TextInputClient* focused_before,
TextInputClient* focused) {
if (IsWindowFocused(focused) && IsTextInputClientFocused(focused)) {
ui::TSFBridge::GetInstance()->SetFocusedClient(
GetAttachedWindowHandle(focused), focused);
// Force to update the input type since client's TextInputStateChanged()
// function might not be called if text input types before the client loses
// focus and after it acquires focus again are the same.
OnTextInputTypeChanged(focused);
// Force to update caret bounds, in case the client thinks that the caret
// bounds has not changed.
OnCaretBoundsChanged(focused);
}
}
void InputMethodTSF::ConfirmCompositionText() {
if (!IsTextInputTypeNone())
ui::TSFBridge::GetInstance()->ConfirmComposition();
}
} // namespace ui
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