IME for Mus: Make InputMethodMus use the IME Mojo API.

ui/views/mus/input_method_mus.cc

 // Copyright (c) 2015 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/views/mus/input_method_mus.h"
 
 #include <utility>
 
 #include "services/ui/public/cpp/window.h"
+#include "services/ui/public/interfaces/ime.mojom.h"
 #include "ui/base/ime/text_input_client.h"
 #include "ui/events/event.h"
 #include "ui/platform_window/mojo/ime_type_converters.h"
 #include "ui/platform_window/mojo/text_input_state.mojom.h"
+#include "ui/views/mus/text_input_client_impl.h"
 
 namespace views {
 
 ////////////////////////////////////////////////////////////////////////////////
-// InputMethodMUS, public:
+// InputMethodMus, public:
 
-InputMethodMUS::InputMethodMUS(ui::internal::InputMethodDelegate* delegate,
+InputMethodMus::InputMethodMus(ui::internal::InputMethodDelegate* delegate,
                                ui::Window* window)
     : window_(window) {
   SetDelegate(delegate);
 }
 
-InputMethodMUS::~InputMethodMUS() {}
+InputMethodMus::~InputMethodMus() {}
+
+void InputMethodMus::Init(shell::Connector* connector) {
+  connector->ConnectToInterface("mojo:ui", &ime_server_);
+}
 
 ////////////////////////////////////////////////////////////////////////////////
-// InputMethodMUS, ui::InputMethod implementation:
+// InputMethodMus, ui::InputMethod implementation:
 
-void InputMethodMUS::OnFocus() {
+void InputMethodMus::OnFocus() {
   InputMethodBase::OnFocus();
   UpdateTextInputType();
 }
 
-void InputMethodMUS::OnBlur() {
+void InputMethodMus::OnBlur() {
   InputMethodBase::OnBlur();
   UpdateTextInputType();
 }
 
-bool InputMethodMUS::OnUntranslatedIMEMessage(const base::NativeEvent& event,
+bool InputMethodMus::OnUntranslatedIMEMessage(const base::NativeEvent& event,
                                               NativeEventResult* result) {
+  // This method is not called on non-Windows platforms. See the comments for
+  // ui::InputMethod::OnUntranslatedIMEMessage().
   return false;
 }
 
-void InputMethodMUS::DispatchKeyEvent(ui::KeyEvent* event) {
+void InputMethodMus::DispatchKeyEvent(ui::KeyEvent* event) {
   DCHECK(event->type() == ui::ET_KEY_PRESSED ||
          event->type() == ui::ET_KEY_RELEASED);
 
   // If no text input client, do nothing.
   if (!GetTextInputClient()) {
     ignore_result(DispatchKeyEventPostIME(event));
     return;
   }
 
-  // Here is where we change the differ from our base class's logic. Instead of
-  // always dispatching a key down event, and then sending a synthesized
-  // character event, we instead check to see if this is a character event and
-  // send out the key if it is. (We fallback to normal dispatch if it isn't.)
+  // TODO(moshayedi): crbug.com/641355. Currently if we stop propagation of
+  // non-char events here, accelerators ddn't work. This is because we send the
+  // event ack too early in NativeWidgetMus. We should send both char and
+  // non-char events to the IME driver once we fix this.
   if (event->is_char()) {
-    GetTextInputClient()->InsertChar(*event);
+    // IME driver will notify the text input client if it is not interested in
+    // event, which in turn will call DispatchKeyEventPostIME().
+    input_method_->ProcessKeyEvent(ui::Event::Clone(*event));
     event->StopPropagation();
     return;
   }
 
   ignore_result(DispatchKeyEventPostIME(event));
 }
 
-void InputMethodMUS::OnTextInputTypeChanged(const ui::TextInputClient* client) {
+void InputMethodMus::OnTextInputTypeChanged(const ui::TextInputClient* client) {
   if (IsTextInputClientFocused(client))
     UpdateTextInputType();
   InputMethodBase::OnTextInputTypeChanged(client);
+
+  if (input_method_) {
+    input_method_->OnTextInputTypeChanged(
+        static_cast<ui::mojom::TextInputType>(client->GetTextInputType()));
+  }
 }
 
-void InputMethodMUS::OnCaretBoundsChanged(const ui::TextInputClient* client) {}
-
-void InputMethodMUS::CancelComposition(const ui::TextInputClient* client) {}
-
-void InputMethodMUS::OnInputLocaleChanged() {}
-
-std::string InputMethodMUS::GetInputLocale() {
-  return "";
+void InputMethodMus::OnCaretBoundsChanged(const ui::TextInputClient* client) {
+  if (input_method_)
+    input_method_->OnCaretBoundsChanged(client->GetCaretBounds());
 }
 
-bool InputMethodMUS::IsCandidatePopupOpen() const {
+void InputMethodMus::CancelComposition(const ui::TextInputClient* client) {
+  if (input_method_)
+    input_method_->CancelComposition();
+}
+
+void InputMethodMus::OnInputLocaleChanged() {
+  // TODO(moshayedi): crbug.com/637418. Not supported in ChromeOS. Investigate
+  // whether we want to support this or not.
+}
+
+std::string InputMethodMus::GetInputLocale() {
+  // TODO(moshayedi): crbug.com/637418. Not supported in ChromeOS. Investigate
+  // whether we want to support this or not.
+  return std::string();
+}
+
+bool InputMethodMus::IsCandidatePopupOpen() const {
+  // TODO(moshayedi): crbug.com/637416. Implement this properly when we have a
+  // mean for displaying candidate list popup.
   return false;
 }
 
-void InputMethodMUS::OnDidChangeFocusedClient(
+void InputMethodMus::OnDidChangeFocusedClient(
     ui::TextInputClient* focused_before,
     ui::TextInputClient* focused) {
   InputMethodBase::OnDidChangeFocusedClient(focused_before, focused);
   UpdateTextInputType();
+
+  text_input_client_.reset(new TextInputClientImpl(focused, this));
+  ime_server_->StartSession(text_input_client_->CreateInterfacePtrAndBind(),
+                            GetProxy(&input_method_));
 }
 
-void InputMethodMUS::UpdateTextInputType() {
+void InputMethodMus::UpdateTextInputType() {
   ui::TextInputType type = GetTextInputType();
   mojo::TextInputStatePtr state = mojo::TextInputState::New();
   state->type = mojo::ConvertTo<mojo::TextInputType>(type);
-  if (type != ui::TEXT_INPUT_TYPE_NONE)
-    window_->SetImeVisibility(true, std::move(state));
-  else
-    window_->SetTextInputState(std::move(state));
+  if (window_) {
+    if (type != ui::TEXT_INPUT_TYPE_NONE)
+      window_->SetImeVisibility(true, std::move(state));
+    else
+      window_->SetTextInputState(std::move(state));
+  }
 }
 
 }  // namespace views