chrome/browser/chromeos/input_method/mode_indicator_controller.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_BROWSER_CHROMEOS_INPUT_METHOD_MODE_INDICATOR_CONTROLLER_H_
   6 #define CHROME_BROWSER_CHROMEOS_INPUT_METHOD_MODE_INDICATOR_CONTROLLER_H_
   7
   8 #include "base/memory/scoped_ptr.h"
   9 #include "ui/base/ime/chromeos/input_method_manager.h"
  10 #include "ui/gfx/geometry/rect.h"
  11 #include "ui/views/widget/widget_observer.h"
  12
  13 namespace chromeos {
  14 namespace input_method {
  15
  16 class ModeIndicatorObserverInterface : public views::WidgetObserver {
  17  public:
  18   ModeIndicatorObserverInterface() {}
  19   ~ModeIndicatorObserverInterface() override {}
  20
  21   virtual void AddModeIndicatorWidget(views::Widget* widget) = 0;
  22 };
  23
  24
  25 // ModeIndicatorController is the controller of ModeIndicatiorDelegateView
  26 // on the MVC model.
  27 class ModeIndicatorController
  28     : public InputMethodManager::Observer {
  29  public:
  30   // This class takes the ownership of |mi_widget|.
  31   explicit ModeIndicatorController(InputMethodManager* imm);
  32   ~ModeIndicatorController() override;
  33
  34   // Set cursor bounds, which is the base point to display this indicator.
  35   // Bacisally this indicator is displayed underneath the cursor.
  36   void SetCursorBounds(const gfx::Rect& cursor_location);
  37
  38   // Notify the focus state to the mode indicator.
  39   void FocusStateChanged(bool is_focused);
  40
  41   // Accessor of the widget observer for testing.  The caller keeps the
  42   // ownership of the observer object.
  43   static void SetModeIndicatorObserverForTesting(
  44       ModeIndicatorObserverInterface* observer);
  45   static ModeIndicatorObserverInterface* GetModeIndicatorObserverForTesting();
  46
  47  private:
  48   // InputMethodManager::Observer implementation.
  49   void InputMethodChanged(InputMethodManager* manager,
  50                           bool show_message) override;
  51
  52   // Show the mode inidicator with the current ime's short name if all
  53   // the conditions are cleared.
  54   void ShowModeIndicator();
  55
  56   InputMethodManager* imm_;
  57
  58   // Cursor bounds representing the anchor rect of the mode indicator.
  59   gfx::Rect cursor_bounds_;
  60
  61   // True on a text field is focused.
  62   bool is_focused_;
  63
  64   // Observer of the widgets created by BubbleDelegateView.  This is used to
  65   // close the previous widget when a new widget is created.
  66   scoped_ptr<ModeIndicatorObserverInterface> mi_observer_;
  67
  68   DISALLOW_COPY_AND_ASSIGN(ModeIndicatorController);
  69 };
  70
  71 }  // namespace input_method
  72 }  // namespace chromeos
  73
  74 #endif  // CHROME_BROWSER_CHROMEOS_INPUT_METHOD_MODE_INDICATOR_CONTROLLER_H_