Mac: Audio indicator in each tab

chrome/browser/ui/cocoa/tabs/tab_strip_controller.mm

 // Copyright (c) 2012 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.
 
 #import "chrome/browser/ui/cocoa/tabs/tab_strip_controller.h"
 
 #import <QuartzCore/QuartzCore.h>
 
 #include <cmath>
 #include <limits>
@@ skipping 93 matching lines @@
 // The amount by which the profile menu button is offset (from tab tabs or new
 // tab button).
 const CGFloat kProfileMenuButtonOffset = 6.0;
 
 // The width and height of the icon + glow for projecting mode.
 const CGFloat kProjectingIconWidthAndHeight = 32.0;
 
 // Throbbing duration on webrtc "this web page is watching you" favicon overlay.
 const int kRecordingDurationMs = 1000;
 
+// Throbbing duration on audio playing animation.
+const int kAudioPlayingDurationMs = 2000;
+
 // Helper class for doing NSAnimationContext calls that takes a bool to disable
 // all the work.  Useful for code that wants to conditionally animate.
 class ScopedNSAnimationContextGroup {
  public:
   explicit ScopedNSAnimationContextGroup(bool animate)
       : animate_(animate) {
     if (animate_) {
       [NSAnimationContext beginGrouping];
     }
   }
@@ skipping 1473 matching lines @@
           NSRect frame =
               NSMakeRect(0, 0, kIconWidthAndHeight, kIconWidthAndHeight);
           ThrobbingImageView* recordingView =
               [[[ThrobbingImageView alloc] initWithFrame:frame
                                          backgroundImage:[imageView image]
                                               throbImage:recording
                                               durationMS:kRecordingDurationMs]
                   autorelease];
 
           iconView = recordingView;
+        } else if (theme && chrome::IsPlayingAudio(contents)) {
+          NSImage* audioImage =
+              theme->GetNSImageNamed(IDR_AUDIO_ANIMATION, true);
+          NSRect frame =
+              NSMakeRect(0, 0, kIconWidthAndHeight, kIconWidthAndHeight);
+          ThrobbingImageView* equalizerFaviconView =
+              [[[ThrobbingImageView alloc]
+                  initWithFrame:frame
+                backgroundImage:[imageView image]
+                     throbImage:audioImage
+                     durationMS:kAudioPlayingDurationMs] autorelease];
+          [equalizerFaviconView setTweenType:ui::Tween::LINEAR];
+
+          iconView = equalizerFaviconView;
         } else {
           iconView = imageView;
         }
       } else if (newState == kTabCrashed) {
         NSImage* oldImage = [[self iconImageViewForContents:contents] image];
         NSRect frame =
             NSMakeRect(0, 0, kIconWidthAndHeight, kIconWidthAndHeight);
         iconView = [ThrobberView toastThrobberViewWithFrame:frame
                                                 beforeImage:oldImage
                                                  afterImage:sadFaviconImage];
@@ skipping 615 matching lines @@
 NSView* GetSheetParentViewForWebContents(WebContents* web_contents) {
   // View hierarchy of the contents view:
   // NSView  -- switchView, same for all tabs
   // +- NSView  -- TabContentsController's view
   //    +- TabContentsViewCocoa
   //
   // Changing it? Do not forget to modify
   // -[TabStripController swapInTabAtIndex:] too.
   return [web_contents->GetView()->GetNativeView() superview];
 }