e/music_control: Add option to pause music on desklock.

Locking your screen pauses the music unlocking starts playing again.
Option is off by default.

src/modules/music-control/e_mod_main.c

@@ -4,6 +4,8 @@
 
 static E_Module *music_control_mod = NULL;
 
+static Eina_Bool was_playing_before_lock = EINA_FALSE;
+
 static const char _e_music_control_Name[] = "Music controller";
 
 const Player music_player_players[] =
@@ -17,6 +19,37 @@ const Player music_player_players[] =
    {NULL, NULL}
 };
 
+Eina_Bool
+_desklock_cb(void *data, int type, void *ev)
+{
+   E_Music_Control_Module_Context *ctxt;
+   E_Event_Desklock *event;
+
+   ctxt = data;
+   event = ev;
+
+   /* Lock with music on. Pause it */
+   if (event->on && ctxt->playing)
+     {
+        media_player2_player_play_pause_call(ctxt->mpris2_player);
+        was_playing_before_lock = EINA_TRUE;
+        return ECORE_CALLBACK_DONE;
+     }
+
+   /* Lock without music. Keep music off as state */
+   if (event->on && (!ctxt->playing))
+     {
+        was_playing_before_lock = EINA_FALSE;
+        return ECORE_CALLBACK_DONE;
+     }
+
+   /* Unlock with music pause and playing before lock. Turn it back on */
+   if ((!event->on) && (!ctxt->playing) && was_playing_before_lock)
+     media_player2_player_play_pause_call(ctxt->mpris2_player);
+
+   return ECORE_CALLBACK_DONE;
+}
+
 static void
 _music_control(E_Object *obj, const char *params)
 {
@@ -242,6 +275,7 @@ e_modapi_init(E_Module *m)
    #define T Music_Control_Config
    #define D ctxt->conf_edd
    E_CONFIG_VAL(D, T, player_selected, INT);
+   E_CONFIG_VAL(D, T, pause_on_desklock, INT);
    ctxt->config = e_config_domain_load(MUSIC_CONTROL_DOMAIN, ctxt->conf_edd);
    if (!ctxt->config)
      ctxt->config = calloc(1, sizeof(Music_Control_Config));
@@ -252,6 +286,9 @@ e_modapi_init(E_Module *m)
 
    e_gadcon_provider_register(&_gc_class);
 
+   if (ctxt->config->pause_on_desklock)
+     desklock_handler = ecore_event_handler_add(E_EVENT_DESKLOCK, _desklock_cb, ctxt);
+
    return ctxt;
 
 error_dbus_bus_get:
@@ -269,6 +306,8 @@ e_modapi_shutdown(E_Module *m)
    free(ctxt->config);
    E_CONFIG_DD_FREE(ctxt->conf_edd);
 
+   E_FREE_FUNC(desklock_handler, ecore_event_handler_del);
+
    media_player2_player_proxy_unref(ctxt->mpris2_player);
    mpris_media_player2_proxy_unref(ctxt->mrpis2);
    edbus_connection_unref(ctxt->conn);

src/modules/music-control/private.h

@@ -5,9 +5,12 @@
 #include "gen/edbus_media_player2_player.h"
 #include "gen/edbus_mpris_media_player2.h"
 
+static Ecore_Event_Handler *desklock_handler = NULL;
+
 typedef struct _Music_Control_Config
 {
    int player_selected;
+   int pause_on_desklock;
 } Music_Control_Config;
 
 typedef struct _E_Music_Control_Module_Context
@@ -36,6 +39,7 @@ const char *music_control_edj_path_get(void);
 void music_control_popup_del(E_Music_Control_Instance *inst);
 void music_control_state_update_all(E_Music_Control_Module_Context *ctxt);
 Eina_Bool music_control_dbus_init(E_Music_Control_Module_Context *ctxt, const char *bus);
+Eina_Bool _desklock_cb(void *data, int type, void *ev);
 
 typedef struct _Player {
    const char *name;

src/modules/music-control/ui.c

@@ -94,12 +94,13 @@ music_control_popup_del(E_Music_Control_Instance *inst)
 struct _E_Config_Dialog_Data
 {
    int index;
+   int pause_on_desklock;
 };
 
 static Evas_Object *
 _cfg_widgets_create(E_Config_Dialog *cfd, Evas *evas, E_Config_Dialog_Data *cfdata)
 {
-   Evas_Object *o, *of, *ob;
+   Evas_Object *o, *of, *ob, *oc;
    E_Radio_Group *rg;
    int i;
    E_Music_Control_Instance *inst = cfd->data;
@@ -119,6 +120,10 @@ _cfg_widgets_create(E_Config_Dialog *cfd, Evas *evas, E_Config_Dialog_Data *cfda
      }
    ob = e_widget_label_add(evas, "* Your player must be configured to export the DBus interface MPRIS2.");
    e_widget_framelist_object_append(of, ob);
+
+   oc = e_widget_check_add(evas, _("Pause music when screen is locked"), &(cfdata->pause_on_desklock));
+   e_widget_framelist_object_append(of, oc);
+
    e_widget_list_object_append(o, of, 1, 1, 0.5);
 
    return o;
@@ -130,6 +135,8 @@ _cfg_data_create(E_Config_Dialog *cfd)
    E_Music_Control_Instance *inst = cfd->data;
    E_Config_Dialog_Data *cfdata = calloc(1, sizeof(E_Config_Dialog_Data));
    cfdata->index = inst->ctxt->config->player_selected;
+   cfdata->pause_on_desklock = inst->ctxt->config->pause_on_desklock;
+
    return cfdata;
 }
 
@@ -144,17 +151,27 @@ _cfg_check_changed(E_Config_Dialog *cfd, E_Config_Dialog_Data *cfdata)
 {
    E_Music_Control_Instance *inst = cfd->data;
 
-   return inst->ctxt->config->player_selected != cfdata->index;
+   return ((inst->ctxt->config->pause_on_desklock != cfdata->pause_on_desklock) ||
+            (inst->ctxt->config->player_selected != cfdata->index));
 }
 
 static int
 _cfg_data_apply(E_Config_Dialog *cfd, E_Config_Dialog_Data *cfdata)
 {
    E_Music_Control_Instance *inst = cfd->data;
-   if (inst->ctxt->config->player_selected == cfdata->index)
+
+   if ((inst->ctxt->config->player_selected == cfdata->index) &&
+       (inst->ctxt->config->pause_on_desklock == cfdata->pause_on_desklock))
      return 1;
 
    inst->ctxt->config->player_selected = cfdata->index;
+   inst->ctxt->config->pause_on_desklock = cfdata->pause_on_desklock;
+
+   if (inst->ctxt->config->pause_on_desklock)
+      desklock_handler = ecore_event_handler_add(E_EVENT_DESKLOCK, _desklock_cb, inst->ctxt);
+   else
+     E_FREE_FUNC(desklock_handler, ecore_event_handler_del);
+
    inst->ctxt->playing = EINA_FALSE;
    mpris_media_player2_proxy_unref(inst->ctxt->mpris2_player);
    media_player2_player_proxy_unref(inst->ctxt->mrpis2);