1 files changed, 105 insertions, 0 deletions
diff --git a/sway/commands/output/background.c b/sway/commands/output/background.c
new file mode 100644
index 00000000..0c5c164f
--- /dev/null
+++ b/sway/commands/output/background.c
@@ -0,0 +1,105 @@
+#define _XOPEN_SOURCE 500
+#include <libgen.h>
+#include <strings.h>
+#include <unistd.h>
+#include <wordexp.h>
+#include "sway/commands.h"
+#include "sway/config.h"
+#include "log.h"
+#include "stringop.h"
+
+static const char *bg_options[] = {
+	"stretch",
+	"center",
+	"fill",
+	"fit",
+	"tile",
+};
+
+struct cmd_results *output_cmd_background(int argc, char **argv) {
+	if (!config->handler_context.output_config) {
+		return cmd_results_new(CMD_FAILURE, "output", "Missing output config");
+	}
+	if (!argc) {
+		return cmd_results_new(CMD_INVALID, "output",
+			"Missing background file or color specification.");
+	}
+	if (argc < 2) {
+		return cmd_results_new(CMD_INVALID, "output",
+			"Missing background scaling mode or `solid_color`.");
+	}
+
+	struct output_config *output = config->handler_context.output_config;
+
+	if (strcasecmp(argv[1], "solid_color") == 0) {
+		output->background = calloc(1, strlen(argv[0]) + 3);
+		snprintf(output->background, strlen(argv[0]) + 3, "\"%s\"", argv[0]);
+		output->background_option = strdup("solid_color");
+		argc -= 2; argv += 2;
+	} else {
+		bool valid = false;
+		char *mode;
+		size_t j;
+		for (j = 0; j < (size_t)argc; ++j) {
+			mode = argv[j];
+			size_t n = sizeof(bg_options) / sizeof(char *);
+			for (size_t k = 0; k < n; ++k) {
+				if (strcasecmp(mode, bg_options[k]) == 0) {
+					valid = true;
+					break;
+				}
+			}
+			if (valid) {
+				break;
+			}
+		}
+		if (!valid) {
+			return cmd_results_new(CMD_INVALID, "output",
+				"Missing background scaling mode.");
+		}
+
+		wordexp_t p;
+		char *src = join_args(argv, j);
+		if (wordexp(src, &p, 0) != 0 || p.we_wordv[0] == NULL) {
+			return cmd_results_new(CMD_INVALID, "output",
+				"Invalid syntax (%s).", src);
+		}
+		free(src);
+		src = p.we_wordv[0];
+		if (config->reading && *src != '/') {
+			char *conf = strdup(config->current_config);
+			if (conf) {
+				char *conf_path = dirname(conf);
+				src = malloc(strlen(conf_path) + strlen(src) + 2);
+				if (src) {
+					sprintf(src, "%s/%s", conf_path, p.we_wordv[0]);
+				} else {
+					wlr_log(L_ERROR,
+						"Unable to allocate background source");
+				}
+				free(conf);
+			} else {
+				wlr_log(L_ERROR, "Unable to allocate background source");
+			}
+		}
+		if (!src || access(src, F_OK) == -1) {
+			wordfree(&p);
+			return cmd_results_new(CMD_INVALID, "output",
+				"Background file unreadable (%s).", src);
+		}
+
+		output->background = strdup(src);
+		output->background_option = strdup(mode);
+		if (src != p.we_wordv[0]) {
+			free(src);
+		}
+		wordfree(&p);
+
+		argc -= j + 1; argv += j + 1;
+	}
+
+	config->handler_context.leftovers.argc = argc;
+	config->handler_context.leftovers.argv = argv;
+	return NULL;
+}
+