Implement swap command

1 files changed, 80 insertions, 0 deletions

diff --git a/sway/commands/swap.c b/sway/commands/swap.c
new file mode 100644
index 00000000..e925ad33
--- /dev/null
+++ b/sway/commands/swap.c
@@ -0,0 +1,80 @@
+#include <strings.h>
+#include <wlr/util/log.h>
+#include "sway/commands.h"
+#include "sway/tree/layout.h"
+#include "sway/tree/view.h"
+#include "stringop.h"
+
+static const char* EXPECTED_SYNTAX =
+        "Expected 'swap container with id|con_id|mark <arg>'";
+
+static bool test_con_id(struct sway_container *container, void *con_id) {
+        return container->id == (size_t)con_id;
+}
+
+static bool test_id(struct sway_container *container, void *id) {
+        xcb_window_t *wid = id;
+        return (container->type == C_VIEW
+                        && container->sway_view->type == SWAY_VIEW_XWAYLAND
+                        && container->sway_view->wlr_xwayland_surface->window_id == *wid);
+}
+
+static bool test_mark(struct sway_container *container, void *mark) {
+        if (container->type == C_VIEW && container->sway_view->marks->length) {
+                return !list_seq_find(container->sway_view->marks,
+                                (int (*)(const void *, const void *))strcmp, mark);
+        }
+        return false;
+}
+
+struct cmd_results *cmd_swap(int argc, char **argv) {
+        struct cmd_results *error = NULL;
+        if ((error = checkarg(argc, "swap", EXPECTED_AT_LEAST, 4))) {
+                return error;
+        }
+
+        if (strcasecmp(argv[0], "container") || strcasecmp(argv[1], "with")) {
+                return cmd_results_new(CMD_INVALID, "swap", EXPECTED_SYNTAX);
+        }
+
+        struct sway_container *current = config->handler_context.current_container;
+        struct sway_container *other;
+
+        char *value = join_args(argv + 3, argc - 3);
+        if (strcasecmp(argv[2], "id") == 0) {
+                xcb_window_t id = strtol(value, NULL, 0);
+                other = container_find(&root_container, test_id, (void *)&id);
+        } else if (strcasecmp(argv[2], "con_id") == 0) {
+                size_t con_id = atoi(value);
+                other = container_find(&root_container, test_con_id, (void *)con_id);
+        } else if (strcasecmp(argv[2], "mark") == 0) {
+                other = container_find(&root_container, test_mark, (void *)value);
+        } else {
+                free(value);
+                return cmd_results_new(CMD_INVALID, "swap", EXPECTED_SYNTAX);
+        }
+
+        if (!other) {
+                error = cmd_results_new(CMD_FAILURE, "swap",
+                                "Failed to find %s '%s'", argv[2], value);
+        } else if (current->type < C_CONTAINER || other->type < C_CONTAINER) {
+                error = cmd_results_new(CMD_FAILURE, "swap",
+                                "Can only swap with containers and views");
+        } else if (container_has_anscestor(current, other)
+                        || container_has_anscestor(other, current)) {
+                error = cmd_results_new(CMD_FAILURE, "swap",
+                                "Cannot swap ancestor and descendant");
+        } else if (current->layout == L_FLOATING || other->layout == L_FLOATING) {
+                error = cmd_results_new(CMD_FAILURE, "swap",
+                                "Swapping with floating containers is not supported");
+        }
+
+        free(value);
+
+        if (error) {
+                return error;
+        }
+
+        container_swap(current, other);
+        return cmd_results_new(CMD_SUCCESS, NULL, NULL);
+}