Add keyboard shortcut to reset volume

Closes #377.

6 files changed, 26 insertions, 7 deletions

diff --git a/contrib/config-example b/contrib/config-example
index 4958e66..b1648fd 100644
--- a/contrib/config-example
+++ b/contrib/config-example
@@ -37,6 +37,7 @@
 #act_stationselectquickmix = x
 #act_voldown = (
 #act_volup = )
+#act_volreset = ^
 
 # Misc
 #audio_quality = low
diff --git a/contrib/pianobar.1 b/contrib/pianobar.1
index 5efaca1..490ee23 100644
--- a/contrib/pianobar.1
+++ b/contrib/pianobar.1
@@ -162,6 +162,10 @@ with 'a' or select none with 'n'.
 Decrease volume.
 
 .TP
+.B act_volreset = ^
+Reset volume.
+
+.TP
 .B act_volup = )
 Increase volume.
 
diff --git a/src/settings.h b/src/settings.h
index 819f8cb..aad1fc4 100644
--- a/src/settings.h
+++ b/src/settings.h
@@ -57,10 +57,11 @@ typedef enum {
 	BAR_KS_MANAGESTATION = 23,
 	BAR_KS_PLAYPAUSE2 = 24,
 	BAR_KS_CREATESTATIONFROMSONG = 25,
-        BAR_KS_PLAY = 26,
-        BAR_KS_PAUSE = 27,
+	BAR_KS_PLAY = 26,
+	BAR_KS_PAUSE = 27,
+	BAR_KS_VOLRESET = 28,
 	/* insert new shortcuts _before_ this element and increase its value */
-	BAR_KS_COUNT = 28,
+	BAR_KS_COUNT = 29,
 } BarKeyShortcutId_t;
 
 #define BAR_KS_DISABLED '\x00'
diff --git a/src/ui_act.c b/src/ui_act.c
index 0f73018..270c1f5 100644
--- a/src/ui_act.c
+++ b/src/ui_act.c
@@ -647,20 +647,30 @@ BarUiActCallback(BarUiActBookmark) {
 	}
 }
 
+static void BarUiActUpdateScale (BarApp_t *app) {
+	/* FIXME: assuming unsigned integer store is atomic operation */
+	app->player.scale = BarPlayerCalcScale (app->player.gain + app->settings.volume);
+}
+
 /*	decrease volume
  */
 BarUiActCallback(BarUiActVolDown) {
 	--app->settings.volume;
-	/* FIXME: assuming unsigned integer store is atomic operation */
-	app->player.scale = BarPlayerCalcScale (app->player.gain + app->settings.volume);
+	BarUiActUpdateScale (app);
 }
 
 /*	increase volume
  */
 BarUiActCallback(BarUiActVolUp) {
 	++app->settings.volume;
-	/* FIXME: assuming unsigned integer store is atomic operation */
-	app->player.scale = BarPlayerCalcScale (app->player.gain + app->settings.volume);
+	BarUiActUpdateScale (app);
+}
+
+/*	reset volume
+ */
+BarUiActCallback(BarUiActVolReset) {
+	app->settings.volume = 0;
+	BarUiActUpdateScale (app);
 }
 
 /*	manage station (remove seeds or feedback)
diff --git a/src/ui_act.h b/src/ui_act.h
index 3e6c4c5..bd2cf88 100644
--- a/src/ui_act.h
+++ b/src/ui_act.h
@@ -60,5 +60,6 @@ BarUiActCallback(BarUiActBookmark);
 BarUiActCallback(BarUiActVolDown);
 BarUiActCallback(BarUiActVolUp);
 BarUiActCallback(BarUiActManageStation);
+BarUiActCallback(BarUiActVolReset);
 
 #endif /* _UI_ACT_H */
diff --git a/src/ui_dispatch.h b/src/ui_dispatch.h
index 6b96ae3..ca8a292 100644
--- a/src/ui_dispatch.h
+++ b/src/ui_dispatch.h
@@ -101,6 +101,8 @@ static const BarUiDispatchAction_t dispatchActions[BAR_KS_COUNT] = {
 				"act_songplay"},
 		{'S', BAR_DC_GLOBAL | BAR_DC_STATION, BarUiActPause, "pause playback",
 				"act_songpause"},
+		{'^', BAR_DC_GLOBAL, BarUiActVolReset, "reset volume",
+				"act_volreset"},
 		};
 
 #include <piano.h>