UI: Rename MediaState to AlertState

chrome/browser/ui/cocoa/tabs/media_indicator_button_cocoa.h

-// Copyright 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_COCOA_TABS_MEDIA_INDICATOR_BUTTON_COCOA_H_
-#define CHROME_BROWSER_UI_COCOA_TABS_MEDIA_INDICATOR_BUTTON_COCOA_H_
-
-#import "base/mac/scoped_nsobject.h"
-#include "base/memory/scoped_ptr.h"
-#include "chrome/browser/ui/tabs/tab_utils.h"
-#import "ui/base/cocoa/hover_button.h"
-
-namespace gfx {
-class Animation;
-class AnimationDelegate;
-}  // namespace gfx
-
-// This is an HoverButton 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 subview of TabView.
-//
-// 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
-// its superview.
-//
-// Note: Send the |-setClickTarget:withAction:| message instead of the
-// |-setTarget:| and |-setAction:| messages to be notified of button clicks.
-@interface MediaIndicatorButton : HoverButton {
- @private
-  class FadeAnimationDelegate;
-
-  // Current TabMediaState.  When animating fade-in/out, this reflects the
-  // indicator state at the end of the animation.
-  TabMediaState mediaState_;
-
-  // Media indicator fade-in/out animation (i.e., only on show/hide, not a
-  // continuous animation).
-  scoped_ptr<gfx::AnimationDelegate> fadeAnimationDelegate_;
-  scoped_ptr<gfx::Animation> fadeAnimation_;
-  TabMediaState showingMediaState_;
-
-  // Target and action invoked whenever a fade-in/out animation completes.  This
-  // is used by TabController to layout the TabView after an indicator has
-  // completely faded out.
-  id animationDoneTarget_;  // weak
-  SEL animationDoneAction_;
-
-  // The image to show when the mouse hovers over the button.
-  base::scoped_nsobject<NSImage> affordanceImage_;
-
-  // Target and action invoked whenever an enabled button is clicked.
-  id clickTarget_;  // weak
-  SEL clickAction_;
-}
-
-@property(readonly, nonatomic) TabMediaState showingMediaState;
-
-// Initialize a new MediaIndicatorButton in TAB_MEDIA_STATE_NONE (i.e., a
-// non-active indicator).
-- (id)init;
-
-// Updates button images, starts fade animations, and activates/deactivates
-// button functionality as appropriate.
-- (void)transitionToMediaState:(TabMediaState)nextState;
-
-// Determines whether the MediaIndicatorButtonCocoa will be clickable for
-// toggling muting.  This should be called whenever the frame of this view is
-// changed, and also whenever the active/inactive state of the tab has changed.
-// Internally, |-transitionToMediaState:| will call this.
-- (void)updateEnabledForMuteToggle;
-
-// Register a message be sent to |target| whenever fade animations complete.  A
-// weak reference on |target| is held.
-- (void)setAnimationDoneTarget:(id)target withAction:(SEL)action;
-
-// Request a message be sent to |target| whenever the enabled button has been
-// clicked.  A weak reference on |target| is held.
-- (void)setClickTarget:(id)target withAction:(SEL)action;
-
-@end
-
-#endif  // CHROME_BROWSER_UI_COCOA_TABS_MEDIA_INDICATOR_BUTTON_COCOA_H_