From d346b69ee9e530383cf8263fe52b9952f7603798 Mon Sep 17 00:00:00 2001
From: Alexandre Lissy <alexandre.lissy@etu.univ-tours.fr>
Date: Mon, 13 Aug 2012 16:57:51 +0200
Subject: [PATCH] Bug 782289 - Headphones status notification. Part 1: Send
 observer notification. r=philikon

We send this notification each time status change. For now, only on/off, maybe
it might be a good thing to add microphone status too. We will observe
this notification in b2g's shell.js to generate a mozChromeEvent.
---
 dom/system/gonk/AudioManager.cpp | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/dom/system/gonk/AudioManager.cpp b/dom/system/gonk/AudioManager.cpp
index 6db2163bf313..70d5d40da7f1 100644
--- a/dom/system/gonk/AudioManager.cpp
+++ b/dom/system/gonk/AudioManager.cpp
@@ -18,6 +18,8 @@
 #include "mozilla/Hal.h"
 #include "AudioManager.h"
 #include "gonk/AudioSystem.h"
+#include "nsIObserverService.h"
+#include "mozilla/Services.h"
 
 using namespace mozilla::dom::gonk;
 using namespace android;
@@ -53,11 +55,27 @@ InternalSetAudioRoutes(SwitchState aState)
   }
 }
 
+static void
+NotifyHeadphonesStatus(SwitchState aState)
+{
+  nsCOMPtr<nsIObserverService> obs = mozilla::services::GetObserverService();
+  if (obs) {
+    if (aState == SWITCH_STATE_ON) {
+      obs->NotifyObservers(nullptr, "headphones-status", NS_LITERAL_STRING("on").get());
+    } else if (aState == SWITCH_STATE_OFF) {
+      obs->NotifyObservers(nullptr, "headphones-status", NS_LITERAL_STRING("off").get());
+    } else {
+      obs->NotifyObservers(nullptr, "headphones-status", NS_LITERAL_STRING("unknown").get());
+    }
+  }
+}
+
 class HeadphoneSwitchObserver : public SwitchObserver
 {
 public:
   void Notify(const SwitchEvent& aEvent) {
     InternalSetAudioRoutes(aEvent.status());
+    NotifyHeadphonesStatus(aEvent.status());
   }
 };