text: // 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.
  
  #ifndef CHROME_BROWSER_UI_ASH_CHROME_KEYBOARD_UI_H_
  #define CHROME_BROWSER_UI_ASH_CHROME_KEYBOARD_UI_H_
  
  #include <memory>
  
  #include "base/macros.h"
  #include "content/public/browser/web_contents_observer.h"
  #include "ui/keyboard/content/keyboard_ui_content.h"
  
  namespace content {
  class BrowserContext;
  class WebContents;
  }
  namespace keyboard {
  class KeyboardController;
  class KeyboardControllerObserver;
  }
  namespace ui {
  class InputMethod;
  }
  
  // Subclass of KeyboardUIContent. It is used by KeyboardController to get
  // access to the virtual keyboard window and setup Chrome extension functions.
  class ChromeKeyboardUI : public keyboard::KeyboardUIContent,
                           public content::WebContentsObserver {
   public:
    explicit ChromeKeyboardUI(content::BrowserContext* context);
    ~ChromeKeyboardUI() override;
  
    // keyboard::KeyboardUIContent overrides
    bool ShouldWindowOverscroll(aura::Window* window) const override;
  
   private:
    // keyboard::KeyboardUIContent overrides
    ui::InputMethod* GetInputMethod() override;
    void RequestAudioInput(
        content::WebContents* web_contents,
        const content::MediaStreamRequest& request,
        const content::MediaResponseCallback& callback) override;
    void SetupWebContents(content::WebContents* contents) override;
    void SetController(keyboard::KeyboardController* controller) override;
    void ShowKeyboardContainer(aura::Window* container) override;
  
    // The overridden implementation dispatches
    // chrome.virtualKeyboardPrivate.onTextInputBoxFocused event to extension to
    // provide the input type information. Naturally, when the virtual keyboard
    // extension is used as an IME then chrome.input.ime.onFocus provides the
    // information, but not when the virtual keyboard is used in conjunction with
    // another IME. virtualKeyboardPrivate.onTextInputBoxFocused is the remedy in
    // that case.
    void SetUpdateInputType(ui::TextInputType type) override;
  
    // content::WebContentsObserver overrides
    void RenderViewCreated(content::RenderViewHost* render_view_host) override;
  
    std::unique_ptr<keyboard::KeyboardControllerObserver> observer_;
  
    DISALLOW_COPY_AND_ASSIGN(ChromeKeyboardUI);
  };
  
  #endif  // CHROME_BROWSER_UI_ASH_CHROME_KEYBOARD_UI_H_
  