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..f039c9c9
--- /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 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;
+}
+