Implement scratchpad

Implements the following commands:

* move scratchpad
* scratchpad show
* [criteria] scratchpad show

Also fixes these:

* Fix memory leak when executing command with criteria
(use `list_free(views)` instead of `free(views)`)
* Fix crash when running `move to` with no further arguments

1 files changed, 37 insertions, 0 deletions

diff --git a/sway/commands/scratchpad.c b/sway/commands/scratchpad.c
new file mode 100644
index 00000000..8a529cb4
--- /dev/null
+++ b/sway/commands/scratchpad.c
@@ -0,0 +1,37 @@
+#include "log.h"
+#include "sway/commands.h"
+#include "sway/config.h"
+#include "sway/scratchpad.h"
+#include "sway/server.h"
+#include "sway/tree/container.h"
+
+struct cmd_results *cmd_scratchpad(int argc, char **argv) {
+        struct cmd_results *error = NULL;
+        if ((error = checkarg(argc, "scratchpad", EXPECTED_EQUAL_TO, 1))) {
+                return error;
+        }
+        if (strcmp(argv[0], "show") != 0) {
+                return cmd_results_new(CMD_INVALID, "scratchpad",
+                                "Expected 'scratchpad show'");
+        }
+        if (!server.scratchpad->length) {
+                return cmd_results_new(CMD_INVALID, "scratchpad",
+                                "Scratchpad is empty");
+        }
+
+        if (config->handler_context.using_criteria) {
+                // If using criteria, this command is executed for every container which
+                // matches the criteria. If this container isn't in the scratchpad,
+                // we'll just silently return a success.
+                struct sway_container *con = config->handler_context.current_container;
+                wlr_log(WLR_INFO, "cmd_scratchpad(%s)", con->name);
+                if (!con->scratchpad) {
+                        return cmd_results_new(CMD_SUCCESS, NULL, NULL);
+                }
+                scratchpad_toggle_container(con);
+        } else {
+                scratchpad_toggle_auto();
+        }
+
+        return cmd_results_new(CMD_SUCCESS, NULL, NULL);
+}