Audio indicator in each tab

chrome/browser/ui/views/tabs/tab.cc

Index: chrome/browser/ui/views/tabs/tab.cc
===================================================================
--- chrome/browser/ui/views/tabs/tab.cc	(revision 184139)
+++ chrome/browser/ui/views/tabs/tab.cc	(working copy)
@@ -510,15 +510,18 @@
       StartCrashAnimation();
 #endif
     }
-
   } else if ((data_.capture_state == TabRendererData::CAPTURE_STATE_NONE) &&
              (old.capture_state != TabRendererData::CAPTURE_STATE_NONE)) {
     StopRecordingAnimation();
-
   } else if ((data_.capture_state != TabRendererData::CAPTURE_STATE_NONE) &&
              (old.capture_state == TabRendererData::CAPTURE_STATE_NONE)) {
     StartRecordingAnimation();
-
+  } else if ((data_.audio_state == TabRendererData::AUDIO_STATE_NONE) &&
+             (old.audio_state != TabRendererData::AUDIO_STATE_NONE)) {
+    StopAudioPlayingAnimation();
+  } else if ((data_.audio_state != TabRendererData::AUDIO_STATE_NONE) &&
+             (old.audio_state == TabRendererData::AUDIO_STATE_NONE)) {
+    StartAudioPlayingAnimation();
   } else {
     if (IsPerformingCrashAnimation())
       StopCrashAnimation();
@@ -1365,7 +1368,8 @@
     int icon_size = frames.height();
     int image_offset = loading_animation_frame_ * icon_size;
     DrawIconCenter(canvas, frames, image_offset,
-                   icon_size, icon_size, bounds, false, SkPaint());
+                   icon_size, icon_size,
+                   bounds, false, SkPaint());
     return;
   }
 
@@ -1378,7 +1382,8 @@
     bounds.set_y(bounds.y() + favicon_hiding_offset_);
     DrawIconCenter(canvas, crashed_favicon, 0,
                     crashed_favicon.width(),
-                    crashed_favicon.height(), bounds, true, SkPaint());
+                    crashed_favicon.height(),
+                    bounds, true, SkPaint());
   } else {
     if (!data().favicon.isNull()) {
       if (data().capture_state == TabRendererData::CAPTURE_STATE_PROJECTING) {
@@ -1398,25 +1403,38 @@
         resized_bounds.set_y(resized_bounds.y() - 1);
 
         DrawIconCenter(canvas, resized_icon, 0,
-                        resized_icon.width(),
-                        resized_icon.height(),
-                        resized_bounds, true, SkPaint());
+                       resized_icon.width(),
+                       resized_icon.height(),
+                       resized_bounds, true, SkPaint());
 
         ui::ThemeProvider* tp = GetThemeProvider();
         gfx::ImageSkia projection_screen(
             *tp->GetImageSkiaNamed(IDR_TAB_CAPTURE));
-
         DrawIconCenter(canvas, projection_screen, 0,
-                        data().favicon.width(),
-                        data().favicon.height(),
-                        bounds, true, SkPaint());
+                       data().favicon.width(),
+                       data().favicon.height(),
+                       bounds, true, SkPaint());
       } else {
-        // TODO(pkasting): Use code in tab_icon_view.cc:PaintIcon() (or switch
-        // to using that class to render the favicon).
         DrawIconCenter(canvas, data().favicon, 0,
-                        data().favicon.width(),
-                        data().favicon.height(),
-                        bounds, true, SkPaint());
+                       data().favicon.width(),
+                       data().favicon.height(),
+                       bounds, true, SkPaint());
+
+        if (data().audio_state == TabRendererData::AUDIO_STATE_PLAYING) {
+          // If audio is playing, we draw on top of the icon the
+          // current equalizer animiation frame.
+          ui::ThemeProvider* tp = GetThemeProvider();
+          gfx::ImageSkia equalizer(*tp->GetImageSkiaNamed(IDR_AUDIO_ANIMATION));
+          int icon_size = equalizer.height();
+          int number_of_frames = equalizer.width() / icon_size;
+          int frame = static_cast<int>(
+              icon_animation_->GetCurrentValue() * number_of_frames);
+          int image_offset = frame * icon_size;
+          DrawIconAtLocation(canvas, equalizer, image_offset,
+                             bounds.x(), bounds.y() + 1,
+                             icon_size, icon_size,
+                             false, SkPaint());
+        }
       }
     }
   }
@@ -1603,6 +1621,21 @@
   icon_animation_.reset();
 }
 
+void Tab::StartAudioPlayingAnimation() {
+  ui::ThrobAnimation* animation = new ui::ThrobAnimation(this);
+  animation->SetTweenType(ui::Tween::LINEAR);
+  animation->SetThrobDuration(2000);
+  animation->StartThrobbing(-1);
+  icon_animation_.reset(animation);
+}
+
+void Tab::StopAudioPlayingAnimation() {
+  if (!icon_animation_.get())
+    return;
+  icon_animation_->Stop();
+  icon_animation_.reset();
+}
+
 bool Tab::IsPerformingCrashAnimation() const {
   return icon_animation_.get() && data_.IsCrashed();
 }