Add simple block for playerctl

Makefile

@@ -4,7 +4,7 @@ CPPFLAGS += -DVERSION=\"$(VERSION)\" -D_POSIX_C_SOURCE=199309L -DYA_INTERNAL -DY
 			-DYA_BSPWM
 CFLAGS += -std=c99 -Iinclude -pedantic -Wall -flto -O2 `pkg-config --cflags pango pangocairo libconfig gdk-pixbuf-2.0 alsa`
 LDFLAGS += -flto -O2
-LDLIBS += -liw -lxcb -lpthread -lxcb-randr -lxcb-ewmh -lxcb-icccm -lm `pkg-config --libs pango pangocairo libconfig gdk-pixbuf-2.0 alsa`
+LDLIBS += -liw -lxcb -lpthread -lxcb-randr -lxcb-ewmh -lxcb-icccm -lm `pkg-config --libs pango pangocairo libconfig gdk-pixbuf-2.0 alsa playerctl-1.0`
 PROGRAM := yabar
 DOCS := $(PROGRAM).1
 PREFIX ?= /usr

doc/yabar.1.asciidoc

@@ -328,6 +328,12 @@ internal-option2: "        "; # icons to indicate quarter, half,
 internal-suffix: "%";
 ----
 
+* *YABAR_SONG* - *Current Song*: Uses 'playerctl' to retrieve the name of the currently played song. Example:
+----
+exec: "YABAR_SONG";
+internal-option1: "spotify";
+----
+
 * *YABAR_VOLUME* - *Volume*: Uses ALSA to display sound volume in percentage. Example:
 ----
 exec: "YABAR_VOLUME";

examples/example.config

@@ -199,4 +199,10 @@ topbar:{
 		foreground-color-rgb:0x92D8F0;
 		underline-color-rgb:0xc0b929;
 	}
+	song:{
+		exec: "YABAR_SONG";
+		fixed-size: 200;
+		type: "periodic";
+		internal-option1: "spotify";
+	}
 }

shell.nix

@@ -4,6 +4,6 @@ with import <nixpkgs>{}; stdenv.mkDerivation {
 
   buildInputs = [
     cairo gdk_pixbuf libconfig pango pkgconfig xorg.xcbutilwm docbook_xsl
-    alsaLib wirelesstools asciidoc libxslt makeWrapper libxml2
+    alsaLib wirelesstools asciidoc libxslt makeWrapper libxml2 playerctl
   ];
 }

src/intern_blks/ya_intern.c

@@ -22,8 +22,10 @@ void ya_int_battery(ya_block_t *blk);
 void ya_int_volume(ya_block_t *blk);
 void ya_int_wifi(ya_block_t *blk);
 void ya_int_diskspace(ya_block_t *blk);
+void ya_int_song(ya_block_t *blk);
 
 struct reserved_blk ya_reserved_blks[YA_INTERNAL_LEN] = {
+	{"YABAR_SONG", ya_int_song},
 	{"YABAR_DATE", ya_int_date},
 	{"YABAR_UPTIME", ya_int_uptime},
 	{"YABAR_THERMAL", ya_int_thermal},
@@ -129,6 +131,66 @@ __attribute__ ((gnu_inline)) inline void ya_setup_prefix_suffix(ya_block_t *blk,
 	}
 }
 
+#include <playerctl/playerctl.h>
+#define CHECK_PLAYER_ERROR(PREFIX) \
+	if (PREFIX) \
+		ya_block_error(blk, "Player error!");
+
+#define PRINT_PAUSED_MSG() \
+	sprintf(startstr,"%s",blk->internal->option[2]);
+
+void ya_int_song(ya_block_t *blk) {
+	char *startstr = blk->buf;
+	size_t prflen = 0,suflen = 0;
+	ya_setup_prefix_suffix(blk, &prflen, &suflen, &startstr);
+
+	GError *e_tmp, *e_title, *e_artist;
+	PlayerctlPlayer *player;
+	gchar *s;
+
+	if (blk->internal->option[0]==NULL)
+		ya_block_error(blk, "Please set option0 for playerctl (e.g. spotify)!");
+	if (blk->internal->option[1]==NULL)
+		blk->internal->option[1] = " - ";
+	if (blk->internal->option[2]==NULL)
+		blk->internal->option[2] = "Paused";
+
+	while (1) {
+		player = playerctl_player_new(blk->internal->option[0], &e_tmp);
+		g_object_get(player, "status", &s, NULL);
+
+		if (s == NULL) {
+			PRINT_PAUSED_MSG();
+			continue;
+		}
+		if (strcmp("Playing", s) == 0) {
+			CHECK_PLAYER_ERROR(e_tmp);
+
+			sprintf(
+				startstr,
+				"%s %s %s",
+				playerctl_player_get_artist(player, &e_artist),
+				blk->internal->option[1],
+				playerctl_player_get_title(player, &e_title)
+			);
+
+			CHECK_PLAYER_ERROR(e_title);
+			CHECK_PLAYER_ERROR(e_artist);
+		} else {
+			PRINT_PAUSED_MSG();
+		}
+
+		if(suflen)
+			strcat(blk->buf, blk->internal->suffix);
+
+		g_free(s);
+		g_object_unref(player);
+
+		ya_draw_pango_text(blk);
+		sleep(blk->sleep);
+	}
+}
+
 #include <time.h>
 void ya_int_date(ya_block_t * blk) {
 	time_t rawtime;