add seat sub command 'xcursor_theme'

New 'seat <name> xcursor_theme <theme> [<size>]' command that
configures the default xcursor theme.

The default seat's xcursor theme is also propagated to XWayland, and
exported through the XCURSOR_THEME and XCURSOR_SIZE environment
variables. This is done every time the default seat's configuration is
changed.

1 files changed, 33 insertions, 0 deletions

diff --git a/sway/commands/seat/xcursor_theme.c b/sway/commands/seat/xcursor_theme.c
new file mode 100644
index 00000000..202f35b9
--- /dev/null
+++ b/sway/commands/seat/xcursor_theme.c
@@ -0,0 +1,33 @@
+#define _POSIX_C_SOURCE 200809L
+#include <string.h>
+#include "sway/commands.h"
+#include "sway/config.h"
+
+struct cmd_results *seat_cmd_xcursor_theme(int argc, char **argv) {
+        struct cmd_results *error = NULL;
+        if ((error = checkarg(argc, "xcursor_theme", EXPECTED_AT_LEAST, 1)) ||
+                (error = checkarg(argc, "xcursor_theme", EXPECTED_AT_MOST, 2))) {
+                return error;
+        }
+        if (!config->handler_context.seat_config) {
+                return cmd_results_new(CMD_FAILURE, "No seat defined");
+        }
+
+        const char *theme_name = argv[0];
+        unsigned size = 24;
+
+        if (argc == 2) {
+                char *end;
+                size = strtoul(argv[1], &end, 10);
+                if (*end) {
+                        return cmd_results_new(
+                                CMD_INVALID, "Expected a positive integer size");
+                }
+        }
+
+        free(config->handler_context.seat_config->xcursor_theme.name);
+        config->handler_context.seat_config->xcursor_theme.name = strdup(theme_name);
+        config->handler_context.seat_config->xcursor_theme.size = size;
+
+        return cmd_results_new(CMD_SUCCESS, NULL);
+}