Extract content dependency from keyboard code

ui/keyboard/keyboard_ui.h

+// Copyright 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.
+
+#ifndef UI_KEYBOARD_KEYBOARD_UI_H_
+#define UI_KEYBOARD_KEYBOARD_UI_H_
+
+#include "base/macros.h"
+#include "ui/base/ime/text_input_type.h"
+#include "ui/keyboard/keyboard_export.h"
+
+namespace aura {
+class Window;
+}
+namespace gfx {
+class Rect;
+}
+namespace ui {
+class InputMethod;
+}
+
+namespace keyboard {
+
+class KeyboardController;
+
+// An interface implemented by an object that implements a keyboard UI.
+class KEYBOARD_EXPORT KeyboardUI {
+ public:
+  KeyboardUI();
+  virtual ~KeyboardUI();
+
+  // Gets the virtual keyboard window. May return null if the window has not yet
+  // been created.
+  virtual aura::Window* GetKeyboardWindow() = 0;
+
+  // Whether the keyboard window has been created.
+  virtual bool HasKeyboardWindow() const = 0;
+
+  // Gets the InputMethod that will provide notifications about changes in the
+  // text input context.
+  virtual ui::InputMethod* GetInputMethod() = 0;
+
+  // Shows the container window of the keyboard. The default implementation
+  // simply shows the container. An overridden implementation can set up
+  // necessary animation, or delay the visibility change as it desires.
+  virtual void ShowKeyboardContainer(aura::Window* container);
+
+  // Hides the container window of the keyboard. The default implementation
+  // simply hides the container. An overridden implementation can set up
+  // necesasry animation, or delay the visibility change as it desires.
+  virtual void HideKeyboardContainer(aura::Window* container);
+
+  // Updates the type of the focused text input box.
+  virtual void SetUpdateInputType(ui::TextInputType type) = 0;
+
+  // Ensures caret in current work area (not occluded by virtual keyboard
+  // window).
+  virtual void EnsureCaretInWorkArea();
+
+  // KeyboardController owns the KeyboardUI instance so KeyboardUI subclasses
+  // should not take ownership of the |controller|. |controller| can be null
+  // when KeyboardController is destroying.
+  virtual void SetController(KeyboardController* controller);
+
+  // Reloads virtual keyboard URL if the current keyboard's web content URL is
+  // different. The URL can be different if user switch from password field to
+  // any other type input field.
+  // At password field, the system virtual keyboard is forced to load even if
+  // the current IME provides a customized virtual keyboard. This is needed to
+  // prevent IME virtual keyboard logging user's password. Once user switch to
+  // other input fields, the virtual keyboard should switch back to the IME
+  // provided keyboard, or keep using the system virtual keyboard if IME doesn't
+  // provide one.
+  virtual void ReloadKeyboardIfNeeded() = 0;
+
+  // When the embedder changes the keyboard bounds, asks the keyboard to adjust
+  // insets for windows affected by this.
+  virtual void InitInsets(const gfx::Rect& keyboard_bounds) = 0;
+
+  // Resets insets for affected windows.
+  virtual void ResetInsets() = 0;
+
+ protected:
+  KeyboardController* keyboard_controller() { return keyboard_controller_; }
+
+ private:
+  keyboard::KeyboardController* keyboard_controller_;
+
+  DISALLOW_COPY_AND_ASSIGN(KeyboardUI);
+};
+
+}  // namespace keyboard
+
+#endif  // UI_KEYBOARD_KEYBOARD_UI_H_