Add map_from_region command

1 files changed, 79 insertions, 0 deletions

diff --git a/sway/commands/input/map_from_region.c b/sway/commands/input/map_from_region.c
new file mode 100644
index 00000000..80bb856d
--- /dev/null
+++ b/sway/commands/input/map_from_region.c
@@ -0,0 +1,79 @@
+#define _POSIX_C_SOURCE 200809L
+#include <stdbool.h>
+#include <string.h>
+#include <strings.h>
+#include "log.h"
+#include "sway/commands.h"
+#include "sway/config.h"
+#include "sway/input/input-manager.h"
+
+static bool parse_coords(const char *str, double *x, double *y, bool *mm) {
+	*mm = false;
+
+	char *end;
+	*x = strtod(str, &end);
+	if (end[0] != 'x') {
+		return false;
+	}
+	++end;
+
+	*y = strtod(end, &end);
+	if (end[0] == 'm') {
+		// Expect mm
+		if (end[1] != 'm') {
+			return false;
+		}
+		*mm = true;
+		end = &end[2];
+	}
+	if (end[0] != '\0') {
+		return false;
+	}
+
+	return true;
+}
+
+struct cmd_results *input_cmd_map_from_region(int argc, char **argv) {
+	struct cmd_results *error = NULL;
+	if ((error = checkarg(argc, "map_from_region", EXPECTED_EQUAL_TO, 2))) {
+		return error;
+	}
+	struct input_config *current_input_config =
+		config->handler_context.input_config;
+	if (!current_input_config) {
+		return cmd_results_new(CMD_FAILURE, "map_from_region",
+			"No input device defined");
+	}
+
+	struct input_config *new_config =
+		new_input_config(current_input_config->identifier);
+
+	new_config->mapped_from_region =
+		calloc(1, sizeof(struct input_config_mapped_from_region));
+
+	bool mm1, mm2;
+	if (!parse_coords(argv[0], &new_config->mapped_from_region->x1,
+			&new_config->mapped_from_region->y1, &mm1)) {
+		return cmd_results_new(CMD_FAILURE, "map_from_region",
+			"Invalid top-left coordinates");
+	}
+	if (!parse_coords(argv[1], &new_config->mapped_from_region->x2,
+			&new_config->mapped_from_region->y2, &mm2)) {
+		return cmd_results_new(CMD_FAILURE, "map_from_region",
+			"Invalid bottom-right coordinates");
+	}
+	if (new_config->mapped_from_region->x1 > new_config->mapped_from_region->x2 ||
+			new_config->mapped_from_region->y1 > new_config->mapped_from_region->y2) {
+		return cmd_results_new(CMD_FAILURE, "map_from_region",
+			"Invalid rectangle");
+	}
+	if (mm1 != mm2) {
+		return cmd_results_new(CMD_FAILURE, "map_from_region",
+			"Both coordinates must be in the same unit");
+	}
+	new_config->mapped_from_region->mm = mm1;
+
+	apply_input_config(new_config);
+
+	return cmd_results_new(CMD_SUCCESS, NULL, NULL);
+}