commands: Add shortcuts_inhibitor command

Add a command to influence keyboard shortcuts inhibitors. In its current
form it can be used to activate, deactivate or toggle an existing
inhibitor on the surface currently receiving input. This can be used to
define an escape shortcut such as:

bindsym --inhibited $mod+Escape seat - shortcuts_inhibitor deactivate

It also allows the user to configure a per-seat default of whether
keyboard inhibitors are honoured by default (the default) or not. Using
the activate/toggle command they can then enable the lingering inhibitor
at a later time of their choosing.

As a side effect this allows to specifically address a named seat for
actions as well, whatever use-case that might serve.

Signed-off-by: Michael Weiser <michael.weiser@gmx.de>

2 files changed, 97 insertions, 0 deletions

diff --git a/sway/commands/seat.c b/sway/commands/seat.c
index eba28cac..84c6ba53 100644
--- a/sway/commands/seat.c
+++ b/sway/commands/seat.c
@@ -22,6 +22,7 @@ static struct cmd_handler seat_handlers[] = {
         { "idle_wake", seat_cmd_idle_wake },
         { "keyboard_grouping", seat_cmd_keyboard_grouping },
         { "pointer_constraint", seat_cmd_pointer_constraint },
+        { "shortcuts_inhibitor", seat_cmd_shortcuts_inhibitor },
         { "xcursor_theme", seat_cmd_xcursor_theme },
 };
 
diff --git a/sway/commands/seat/shortcuts_inhibitor.c b/sway/commands/seat/shortcuts_inhibitor.c
new file mode 100644
index 00000000..7c7f99cf
--- /dev/null
+++ b/sway/commands/seat/shortcuts_inhibitor.c
@@ -0,0 +1,96 @@
+#include "log.h"
+#include "sway/commands.h"
+#include "sway/input/seat.h"
+#include "sway/input/input-manager.h"
+#include "util.h"
+
+static struct cmd_results *handle_action(struct seat_config *sc,
+                struct sway_seat *seat, const char *action) {
+        struct sway_keyboard_shortcuts_inhibitor *sway_inhibitor = NULL;
+        if (strcmp(action, "disable") == 0) {
+                sc->shortcuts_inhibit = SHORTCUTS_INHIBIT_DISABLE;
+
+                wl_list_for_each(sway_inhibitor,
+                                &seat->keyboard_shortcuts_inhibitors, link) {
+                        wlr_keyboard_shortcuts_inhibitor_v1_deactivate(
+                                        sway_inhibitor->inhibitor);
+                }
+
+                sway_log(SWAY_DEBUG, "Deactivated all keyboard shortcuts inhibitors");
+        } else {
+                sway_inhibitor = keyboard_shortcuts_inhibitor_get_for_focused_surface(seat);
+                if (!sway_inhibitor) {
+                        return cmd_results_new(CMD_FAILURE,
+                                        "No inhibitor found for focused surface");
+                }
+
+                struct wlr_keyboard_shortcuts_inhibitor_v1 *inhibitor =
+                        sway_inhibitor->inhibitor;
+                bool inhibit;
+                if (strcmp(action, "activate") == 0) {
+                        inhibit = true;
+                } else if (strcmp(action, "deactivate") == 0) {
+                        inhibit = false;
+                } else if (strcmp(action, "toggle") == 0) {
+                        inhibit = !inhibitor->active;
+                } else {
+                        return cmd_results_new(CMD_INVALID, "Expected enable|"
+                                        "disable|activate|deactivate|toggle");
+                }
+
+                if (inhibit) {
+                        wlr_keyboard_shortcuts_inhibitor_v1_activate(inhibitor);
+                } else {
+                        wlr_keyboard_shortcuts_inhibitor_v1_deactivate(inhibitor);
+                }
+
+                sway_log(SWAY_DEBUG, "%sctivated keyboard shortcuts inhibitor",
+                                inhibit ? "A" : "Dea");
+        }
+
+        return cmd_results_new(CMD_SUCCESS, NULL);
+}
+
+// shortcuts_inhibitor [enable|disable|activate|deactivate|toggle]
+struct cmd_results *seat_cmd_shortcuts_inhibitor(int argc, char **argv) {
+        struct cmd_results *error =
+                checkarg(argc, "shortcuts_inhibitor", EXPECTED_EQUAL_TO, 1);
+        if (error) {
+                return error;
+        }
+
+        struct seat_config *sc = config->handler_context.seat_config;
+        if (!sc) {
+                return cmd_results_new(CMD_FAILURE, "No seat defined");
+        }
+
+        if (strcmp(argv[0], "enable") == 0) {
+                sc->shortcuts_inhibit = SHORTCUTS_INHIBIT_ENABLE;
+        // at runtime disable is an action that also deactivates all active
+        // inhibitors handled in handle_action()
+        } else if (strcmp(argv[0], "disable") == 0 && !config->active) {
+                sc->shortcuts_inhibit = SHORTCUTS_INHIBIT_DISABLE;
+        } else if (!config->active) {
+                return cmd_results_new(CMD_INVALID, "only enable and disable "
+                                "can be used in the config");
+        } else {
+                if (strcmp(sc->name, "*") != 0) {
+                        struct sway_seat *seat = input_manager_get_seat(sc->name, false);
+                        if (!seat) {
+                                return cmd_results_new(CMD_FAILURE,
+                                                "Seat %s does not exist", sc->name);
+                        }
+                        error = handle_action(sc, seat, argv[0]);
+                } else {
+                        struct sway_seat *seat = NULL;
+                        wl_list_for_each(seat, &server.input->seats, link) {
+                                error = handle_action(sc, seat, argv[0]);
+                                if (error && error->status != CMD_SUCCESS) {
+                                        break;
+                                }
+                        }
+                }
+        }
+
+        return error ? error : cmd_results_new(CMD_SUCCESS, NULL);
+}