Add wallpapers to output command

sway.5.txt

@@ -115,14 +115,28 @@ Commands
 	When _output_: place mouse at center of newly focused window when changing
 	output. When _none_: don't move mouse.
 
-**output** <name> <resolution|res WIDTHxHEIGHT> <position|pos X,Y>::
-	Configures the specified output. It will use the given resolution and be
-	arranged at the given position in the layout tree. You may omit either of
-	these parameters if you only want to set one of them.
+**output** <name> <resolution|res> <WIDTHxHEIGHT>::
+	Configures the specified output to use the given resolution.
+
+**output** <name> <position|pos> <X,Y>::
+	Configures the specified output to be arranged at the given position.
+
+**output** <name> <background|bg> <file> <mode>::
+	Sets the wallpaper for the given output to the specified file, using the given
+	scaling mode (one of "stretch", "fill", "center", "tile").
 
 **output** <name> disable::
 	Disables the specified output.
 
+**NOTES FOR THE OUTPUT COMMAND**::
+	You may combine output commands into one, like so:
+	+
+	output HDMI-A-1 res 1920x1080 pos 1920,0 bg ~/wallpaper.png stretch
+	+
+	You can get a list of output names like so:
+	+
+	swaymsg -t get_outputs
+
 **reload**::
 	Reloads the sway config file without restarting sway.
 

sway/config.c

@@ -314,6 +314,28 @@ void apply_output_config(struct output_config *oc, swayc_t *output) {
 		}
 		output->x = x;
 	}
+
+	if (oc->background) {
+		int i;
+		for (i = 0; i < root_container.children->length; ++i) {
+			if (root_container.children->items[i] == output) {
+				break;
+			}
+		}
+
+		sway_log(L_DEBUG, "Setting background for output %d to %s", i, oc->background);
+		char *cmd = malloc(
+				strlen("swaybg ") +
+				(i >= 10 ? 2 : 1) +
+				strlen(oc->background) + 3 +
+				strlen(oc->background_option) + 3 +
+				1);
+		sprintf(cmd, "swaybg %d '%s' '%s'", i, oc->background, oc->background_option);
+		if (fork() == 0) {
+			execl("/bin/sh", "/bin/sh", "-c", cmd, (void *)NULL);
+		}
+		free(cmd);
+	}
 }
 
 char *do_var_replacement(char *str) {

sway/handlers.c

@@ -43,6 +43,11 @@ static bool handle_output_created(wlc_handle output) {
 		swayc_t *ws = op->children->items[0];
 		workspace_switch(ws);
 	}
+
+	// Fixes issues with backgrounds and wlc
+	wlc_handle prev = wlc_get_focused_output();
+	wlc_output_focus(output);
+	wlc_output_focus(prev);
 	return true;
 }
 

swaybg/main.c

@@ -28,17 +28,18 @@ int main(int argc, char **argv) {
 	surfaces = create_list();
 	registry = registry_poll();
 
-	if (argc < 2) {
-		sway_abort("Usage: swaybg path/to/file.png");
+	if (argc < 4) {
+		sway_abort("Do not run this program manually. See man 5 sway and look for output options.");
 	}
 
 	if (!registry->desktop_shell) {
 		sway_abort("swaybg requires the compositor to support the desktop-shell extension.");
 	}
 
+	int desired_output = atoi(argv[1]);
+	sway_log(L_INFO, "Using output %d of %d", desired_output, registry->outputs->length);
 	int i;
-	for (i = 0; i < registry->outputs->length; ++i) {
-		struct output_state *output = registry->outputs->items[i];
+	struct output_state *output = registry->outputs->items[desired_output];
 	struct window *window = window_setup(registry, 100, 100, false);
 	if (!window) {
 		sway_abort("Failed to create surfaces.");
@@ -47,9 +48,9 @@ int main(int argc, char **argv) {
 	window->height = output->height;
 	desktop_shell_set_background(registry->desktop_shell, output->output, window->surface);
 	list_add(surfaces, window);
-	}
 
-	cairo_surface_t *image = cairo_image_surface_create_from_png(argv[1]);
+	char *scaling_mode = argv[3];
+	cairo_surface_t *image = cairo_image_surface_create_from_png(argv[2]);
 	double width = cairo_image_surface_get_width(image);
 	double height = cairo_image_surface_get_height(image);
 

wayland/window.c

@@ -17,7 +17,6 @@
 
 static void pointer_handle_enter(void *data, struct wl_pointer *pointer,
 		     uint32_t serial, struct wl_surface *surface, wl_fixed_t sx_w, wl_fixed_t sy_w) {
-	sway_log(L_INFO, "Set cursor");
 	struct window *window = data;
 	struct wl_cursor_image *image = window->cursor.cursor->images[0];
 	wl_pointer_set_cursor(pointer, serial, window->cursor.surface, image->hotspot_x, image->hotspot_y);
@@ -72,7 +71,6 @@ struct window *window_setup(struct registry *registry, uint32_t width, uint32_t
 		wl_shell_surface_set_toplevel(window->shell_surface);
 	}
 	if (registry->pointer) {
-		sway_log(L_INFO, "Register pointer");
 		wl_pointer_add_listener(registry->pointer, &pointer_listener, window);
 	}