UI: Rename MediaState to AlertState

chrome/browser/ui/views/tabs/media_indicator_button.h

-// Copyright 2014 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_VIEWS_TABS_MEDIA_INDICATOR_BUTTON_H_
-#define CHROME_BROWSER_UI_VIEWS_TABS_MEDIA_INDICATOR_BUTTON_H_
-
-#include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
-#include "chrome/browser/ui/tabs/tab_utils.h"
-#include "ui/views/controls/button/image_button.h"
-#include "ui/views/view_targeter_delegate.h"
-
-class Tab;
-
-namespace gfx {
-class Animation;
-class AnimationDelegate;
-}
-
-// This is an ImageButton subclass that serves as both the media indicator icon
-// (audio, tab capture, etc.), and as a mute button.  It is meant to only be
-// used as a child view of Tab.
-//
-// When the indicator is transitioned to the audio playing or muting state, the
-// button functionality is enabled and begins handling mouse events.  Otherwise,
-// this view behaves like an image and all mouse events will be handled by the
-// Tab (its parent View).
-class MediaIndicatorButton : public views::ImageButton,
-                             public views::ViewTargeterDelegate {
- public:
-  // The MediaIndicatorButton's class name.
-  static const char kViewClassName[];
-
-  explicit MediaIndicatorButton(Tab* parent_tab);
-  ~MediaIndicatorButton() override;
-
-  // Returns the current TabMediaState except, while the indicator image is
-  // fading out, returns the prior TabMediaState.
-  TabMediaState showing_media_state() const {
-    return showing_media_state_;
-  }
-
-  // Calls ResetImages(), starts fade animations, and activates/deactivates
-  // button functionality as appropriate.
-  void TransitionToMediaState(TabMediaState next_state);
-
-  // Determines whether the MediaIndicatorButton will be clickable for toggling
-  // muting.  This should be called whenever the active/inactive state of a tab
-  // has changed.  Internally, TransitionToMediaState() and OnBoundsChanged()
-  // calls this when the TabMediaState or the bounds have changed.
-  void UpdateEnabledForMuteToggle();
-
-  // Called when the parent tab's button color changes.  Determines whether
-  // ResetImages() needs to be called.
-  void OnParentTabButtonColorChanged();
-
- protected:
-  // views::View:
-  const char* GetClassName() const override;
-  View* GetTooltipHandlerForPoint(const gfx::Point& point) override;
-  bool OnMousePressed(const ui::MouseEvent& event) override;
-  bool OnMouseDragged(const ui::MouseEvent& event) override;
-  void OnMouseEntered(const ui::MouseEvent& event) override;
-  void OnMouseMoved(const ui::MouseEvent& event) override;
-  void OnBoundsChanged(const gfx::Rect& previous_bounds) override;
-  void OnPaint(gfx::Canvas* canvas) override;
-
-  // views::ViewTargeterDelegate
-  bool DoesIntersectRect(const View* target,
-                         const gfx::Rect& rect) const override;
-
-  // views::Button:
-  void NotifyClick(const ui::Event& event) override;
-
-  // views::CustomButton:
-  bool IsTriggerableEvent(const ui::Event& event) override;
-
- private:
-  friend class MediaIndicatorButtonTest;
-  class FadeAnimationDelegate;
-
-  // Returns the tab (parent view) of this MediaIndicatorButton.
-  Tab* GetTab() const;
-
-  // Resets the images to display on the button to reflect |state| and the
-  // parent tab's button color.  Should be called when either of these changes.
-  void ResetImages(TabMediaState state);
-
-  Tab* const parent_tab_;
-
-  TabMediaState media_state_;
-
-  // Media indicator fade-in/out animation (i.e., only on show/hide, not a
-  // continuous animation).
-  scoped_ptr<gfx::AnimationDelegate> fade_animation_delegate_;
-  scoped_ptr<gfx::Animation> fade_animation_;
-  TabMediaState showing_media_state_;
-
-  DISALLOW_COPY_AND_ASSIGN(MediaIndicatorButton);
-};
-
-#endif  // CHROME_BROWSER_UI_VIEWS_TABS_MEDIA_INDICATOR_BUTTON_H_