allow setting of position at startup

wayneko.1

@@ -22,6 +22,7 @@ wayneko \- Neko on Wayland but with phases
 .OP \-\-currently awake|asleep|random
 .OP \-\-layer background|bottom|top|overlay
 .OP \-\-output name
+.OP \-\-position float
 .OP \-\-survive\-close
 .YS
 .
@@ -111,6 +112,14 @@ exist. Defaults to the currently selected monitor.
 .RE
 .
 .P
+\fB\-\-position\fR \fIfloat\fR|\fBrandom\fR
+.RS
+Set the position neko is at on startup. Expects a float between 0 and 1, where
+0 is the leftmost position and 1 is to the rightmost one. Defaults to the
+center, i.e. 0.5.
+.RE
+.
+.P
 \fB\-\-survive\-close\fR
 .RS
 If this flag is used, wayneko will recreate the surface after it has been closed.

wayneko.c

@@ -37,6 +37,7 @@ const char usage[] =
     "  --sleep-phase       seconds-seconds\n"
     "  --awake-phase       seconds-seconds\n"
     "  --currently         awake|asleep|random\n"
+    "  --position          float\n"
 	"  --layer             background|bottom|top|overlay\n"
 	"  --output            name\n"
 	"  --survive-close\n"
@@ -82,6 +83,7 @@ enum Type type = PLAIN;
 bool follow_pointer = false; // TODO: implement this again
 bool recreate_surface_on_close = false;
 enum zwlr_layer_shell_v1_layer layer = ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM;
+float start_position = 0.5;
 
 struct ext_idle_notifier_v1 *idle_notifier = NULL;
 uint32_t neko_idle_timeout_ms = 180000; /* 3 minutes. */
@@ -1176,7 +1178,7 @@ static void layer_surface_handle_configure (void *data, struct zwlr_layer_surfac
 	/* Center neko on first configure. */
 	if (!surface.configured)
 	{
-		surface.neko_x = (uint16_t)((width / 2) - neko_size);
+		surface.neko_x = (uint16_t)((float) (width - neko_size) * start_position);
 		surface.prev_neko_x = surface.neko_x;
 	}
 
@@ -1485,6 +1487,26 @@ int main (int argc, char *argv[])
 			else if ( strcmp(a, "overlay") == 0 )
 				layer = ZWLR_LAYER_SHELL_V1_LAYER_OVERLAY;
 		}
+		else if ( strcmp(argv[i], "--position") == 0 )
+		{
+			char *a = get_argument(argc, argv, &i);
+			if (strcmp(a, "random") == 0)
+				start_position = (float) (rand() % 1000) / (float) 1000;
+			else {
+			    char* result = a;
+				float f = strtof(a, &result);
+
+				if (result == a) {
+					fprintf(stderr, "ERROR: Invalid argument '%s' for flag '--position'.\n", a);
+					return EXIT_FAILURE;
+				} else if (f > 1.0 || f < 0.0) {
+				    fprintf(stderr, "ERROR: Number passed for flag '--position' must be between 0 and 1.\n");
+					return EXIT_FAILURE;
+				} else {
+				    start_position = f;
+				}
+			}
+		}
 		else if ( strcmp(argv[i], "--idle-sleep") == 0 )
 		{
 			const char *a = get_argument(argc, argv, &i);