Remove the 2-level input method system & InputMethodBridge.

ui/views/ime/input_method.h

-// 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.
-
-#ifndef UI_VIEWS_IME_INPUT_METHOD_H_
-#define UI_VIEWS_IME_INPUT_METHOD_H_
-
-#include <string>
-
-#include "base/basictypes.h"
-#include "base/event_types.h"
-#include "base/i18n/rtl.h"
-#include "ui/base/ime/text_input_type.h"
-#include "ui/views/views_export.h"
-
-namespace ui {
-class KeyEvent;
-class TextInputClient;
-}  // namespace ui
-
-namespace views {
-
-namespace internal {
-class InputMethodDelegate;
-}  // namespace internal
-
-class View;
-class Widget;
-
-// An interface implemented by an object that encapsulates a native input method
-// service provided by the underlying operation system. Input method services
-// are typically bound to individual native windows (HWND, aura::Window, etc.).
-// In Views, only the top-level Widgets get keyboard focus, so this API is
-// designed to be bound to top-level Widgets.
-class VIEWS_EXPORT InputMethod {
- public:
-
-#if defined(OS_WIN)
-  typedef LRESULT NativeEventResult;
-#else
-  typedef int32 NativeEventResult;
-#endif
-
-  virtual ~InputMethod() {}
-
-  // Sets the delegate used by this InputMethod instance.
-  // This should only be called by the owner Widget or testing code.
-  virtual void SetDelegate(internal::InputMethodDelegate* delegate) = 0;
-
-  // Initialize the InputMethod object and attach it to the given |widget|.
-  // The |widget| must already be initialized.
-  virtual void Init(Widget* widget) = 0;
-
-  // Called when the top-level Widget gains or loses keyboard focus.
-  // These should only be called by the Widget that owns this InputMethod.
-  virtual void OnFocus() = 0;
-  virtual void OnBlur() = 0;
-
-  // Called when the focused window receives native IME messages that are not
-  // translated into other predefined event callbacks. Currently this method is
-  // used only for IME functionalities specific to Windows.
-  // TODO(ime): Break down these messages into platform-neutral methods.
-  virtual bool OnUntranslatedIMEMessage(const base::NativeEvent& event,
-                                        NativeEventResult* result) = 0;
-
-  // Dispatch a key event to the input method. The key event will be dispatched
-  // back to the caller via InputMethodDelegate::DispatchKeyEventPostIME(), once
-  // it has been processed by the input method. It should only be called by the
-  // top-level Widget that owns this InputMethod instance, or other related
-  // platform-specific code, such as a message dispatcher.
-  virtual void DispatchKeyEvent(const ui::KeyEvent& key) = 0;
-
-  // Called by the focused |view| whenever its text input type has changed.
-  // Before calling this method, the focused |view| must confirm or clear any
-  // existing composition text and call InputMethod::CancelComposition() when
-  // necessary. This method has no effect if |view| is not focused.
-  virtual void OnTextInputTypeChanged(View* view) = 0;
-
-  // Called by the focused |view| whenever its caret bounds have changed.
-  // This method has no effect if |view| is not focused.
-  virtual void OnCaretBoundsChanged(View* view) = 0;
-
-  // Called by the focused |view| to cancel the ongoing composition session.
-  // This method has no effect if |view| is not focused.
-  virtual void CancelComposition(View* view) = 0;
-
-  // Called by the focused client whenever its input locale is changed.
-  // This method is currently used only on Windows.
-  // This method does not take a parameter of View for historical reasons.
-  // TODO(ime): Consider to take a parameter of View.
-  virtual void OnInputLocaleChanged() = 0;
-
-  // Returns the locale of current keyboard layout or input method, as a BCP-47
-  // tag, or an empty string if the input method cannot provide it.
-  virtual std::string GetInputLocale() = 0;
-
-  // Returns true if the input method is ready to process keyboard events and
-  // generate composition or text results. It is not necessary to notify
-  // inactive input methods of caret bounds or text input type changes.
-  // Note: TextInputClient::InsertChar() may be called to send input to the text
-  // input client even if the input method is not active.
-  virtual bool IsActive() = 0;
-
-  // Returns the focused text input client, or NULL if the Widget is not active,
-  // has no focused View, or if the focused View does not support text input.
-  virtual ui::TextInputClient* GetTextInputClient() const = 0;
-
-  // Gets the text input type of the focused text input client. Returns
-  // ui::TEXT_INPUT_TYPE_NONE if there is no focused text input client.
-  virtual ui::TextInputType GetTextInputType() const = 0;
-
-  // Returns true if we know for sure that a candidate window (or IME suggest,
-  // etc.) is open.  Returns false if no popup window is open or the detection
-  // of IME popups is not supported.
-  virtual bool IsCandidatePopupOpen() const = 0;
-
-  // Displays an on screen keyboard if enabled.
-  virtual void ShowImeIfNeeded() = 0;
-
-  // TODO(suzhe): Support mouse/touch event.
-};
-
-}  // namespace views
-
-#endif  // UI_VIEWS_IME_INPUT_METHOD_H_