Deny repeating reload by holding key

Fixes #2568

The binding that gets stored in the keyboard's `repeat_binding` would
get freed on reload, leaving a dangling pointer.

Rather than attempt to unset the keyboard's `repeat_binding` along with
the other bindings, I opted to just not set it for the reload command
because there's no point in reloading repeatedly by holding the binding.
This disables repeat bindings for the reload command.

As we now need to detect whether it's a reload command in two places,
I've added a binding flag to track whether it's a reload or not.

include/sway/config.h

@@ -31,10 +31,11 @@ enum binding_input_type {
 
 enum binding_flags {
 	BINDING_RELEASE=1,
-	BINDING_LOCKED=2, // keyboard only
-	BINDING_BORDER=4, // mouse only; trigger on container border
-	BINDING_CONTENTS=8, // mouse only; trigger on container contents
-	BINDING_TITLEBAR=16 // mouse only; trigger on container titlebar
+	BINDING_LOCKED=2,    // keyboard only
+	BINDING_BORDER=4,    // mouse only; trigger on container border
+	BINDING_CONTENTS=8,  // mouse only; trigger on container contents
+	BINDING_TITLEBAR=16, // mouse only; trigger on container titlebar
+	BINDING_RELOAD=32,   // the binding runs the reload command
 };
 
 /**

sway/commands/bind.c

@@ -214,6 +214,9 @@ static struct cmd_results *cmd_bindsym_or_bindcode(int argc, char **argv,
 	}
 
 	binding->command = join_args(argv + 1, argc - 1);
+	if (strcasestr(binding->command, "reload")) {
+		binding->flags |= BINDING_RELOAD;
+	}
 
 	list_t *split = split_string(argv[0], "+");
 	for (int i = 0; i < split->length; ++i) {
@@ -307,11 +310,9 @@ void seat_execute_command(struct sway_seat *seat, struct sway_binding *binding)
 		binding->command);
 
 	struct sway_binding *binding_copy = binding;
-	bool reload = false;
 	// if this is a reload command we need to make a duplicate of the
 	// binding since it will be gone after the reload has completed.
-	if (strcasestr(binding->command, "reload")) {
-		reload = true;
+	if (binding->flags & BINDING_RELOAD) {
 		binding_copy = sway_binding_dup(binding);
 		if (!binding_copy) {
 			wlr_log(WLR_ERROR, "Failed to duplicate binding during reload");
@@ -328,7 +329,7 @@ void seat_execute_command(struct sway_seat *seat, struct sway_binding *binding)
 			binding->command, results->error);
 	}
 
-	if (reload) { // free the binding if we made a copy
+	if (binding->flags & BINDING_RELOAD) { // free the binding if we made a copy
 		free_sway_binding(binding_copy);
 	}
 	free_cmd_results(results);

sway/input/keyboard.c

@@ -280,7 +280,10 @@ static void handle_keyboard_key(struct wl_listener *listener, void *data) {
 		if (binding_pressed) {
 			seat_execute_command(seat, binding_pressed);
 			handled = true;
-			next_repeat_binding = binding_pressed;
+
+			if ((binding_pressed->flags & BINDING_RELOAD) == 0) {
+				next_repeat_binding = binding_pressed;
+			}
 		}
 	}