Merge pull request #438 from mikkeloscar/binding-event

Implement IPC binding event (keyboard)

CMakeLists.txt

@@ -44,6 +44,7 @@ option(enable-swaybar "Enables the swaybar utility" YES)
 option(enable-swaygrab "Enables the swaygrab utility" YES)
 option(enable-swaymsg "Enables the swaymsg utility" YES)
 option(enable-gdk-pixbuf "Use Pixbuf to support more image formats" YES)
+option(enable-binding-event "Enables binding event subscription" YES)
 
 find_package(JsonC REQUIRED)
 find_package(PCRE REQUIRED)
@@ -112,6 +113,9 @@ if(enable-swaylock)
 		message(WARNING "Not building swaylock - cairo, pango, and PAM are required.")
 	endif()
 endif()
+if(enable-binding-event)
+	add_definitions(-DSWAY_BINDING_EVENT=1)
+endif()
 
 install(
 	FILES ${CMAKE_CURRENT_SOURCE_DIR}/sway.desktop

common/util.c

@@ -51,3 +51,17 @@ const char *get_modifier_name_by_mask(uint32_t modifier) {
 
 	return NULL;
 }
+
+int get_modifier_names(const char **names, uint32_t modifier_masks) {
+	int length = 0;
+	int i;
+	for (i = 0; i < (int)(sizeof(modifiers) / sizeof(struct modifier_key)); ++i) {
+		if ((modifier_masks & modifiers[i].mod) != 0) {
+			names[length] = modifiers[i].name;
+			++length;
+			modifier_masks ^= modifiers[i].mod;
+		}
+	}
+
+	return length;
+}

include/config.h

@@ -189,6 +189,7 @@ int sway_binding_cmp(const void *a, const void *b);
 int sway_binding_cmp_qsort(const void *a, const void *b);
 int sway_binding_cmp_keys(const void *a, const void *b);
 void free_sway_binding(struct sway_binding *sb);
+struct sway_binding *sway_binding_dup(struct sway_binding *sb);
 
 int sway_mouse_binding_cmp(const void *a, const void *b);
 int sway_mouse_binding_cmp_qsort(const void *a, const void *b);

include/ipc-server.h

@@ -21,6 +21,10 @@ void ipc_event_mode(const char *mode);
  * the name of that modifier.
  */
 void ipc_event_modifier(uint32_t modifier, const char *state);
+/**
+ * Send IPC keyboard binding event.
+ */
+void ipc_event_binding_keyboard(struct sway_binding *sb);
 const char *swayc_type_string(enum swayc_types type);
 
 #endif

include/util.h

@@ -29,4 +29,11 @@ uint32_t get_modifier_mask_by_name(const char *name);
  */
 const char *get_modifier_name_by_mask(uint32_t modifier);
 
+/**
+ * Get an array of modifier names from modifier_masks
+ *
+ * Populates the names array and return the number of names added.
+ */
+int get_modifier_names(const char **names, uint32_t modifier_masks);
+
 #endif

sway/config.c

@@ -721,6 +721,24 @@ void free_sway_mouse_binding(struct sway_mouse_binding *binding) {
 	free(binding);
 }
 
+struct sway_binding *sway_binding_dup(struct sway_binding *sb) {
+	struct sway_binding *new_sb = malloc(sizeof(struct sway_binding));
+
+	new_sb->order = sb->order;
+	new_sb->modifiers = sb->modifiers;
+	new_sb->command = strdup(sb->command);
+
+	new_sb->keys = create_list();
+	int i;
+	for (i = 0; i < sb->keys->length; ++i) {
+		xkb_keysym_t *key = malloc(sizeof(xkb_keysym_t));
+		*key = *(xkb_keysym_t *)sb->keys->items[i];
+		list_add(new_sb->keys, key);
+	}
+
+	return new_sb;
+}
+
 struct bar_config *default_bar_config(void) {
 	struct bar_config *bar = NULL;
 	bar = malloc(sizeof(struct bar_config));

sway/handlers.c

@@ -336,6 +336,29 @@ static void handle_view_state_request(wlc_handle view, enum wlc_view_state_bit s
 	return;
 }
 
+static void handle_binding_command(struct sway_binding *binding) {
+	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 (strcasecmp(binding->command, "reload") == 0) {
+		binding_copy = sway_binding_dup(binding);
+		reload = true;
+	}
+
+	struct cmd_results *res = handle_command(binding->command);
+	if (res->status != CMD_SUCCESS) {
+		sway_log(L_ERROR, "Command '%s' failed: %s", res->input, res->error);
+	}
+	ipc_event_binding_keyboard(binding_copy);
+
+	if (reload) { // free the binding if we made a copy
+		free_sway_binding(binding_copy);
+	}
+
+	free_cmd_results(res);
+}
+
 static bool handle_bindsym(struct sway_binding *binding) {
 	bool match = false;
 	int i;
@@ -347,11 +370,7 @@ static bool handle_bindsym(struct sway_binding *binding) {
 	}
 
 	if (match) {
-		struct cmd_results *res = handle_command(binding->command);
-		if (res->status != CMD_SUCCESS) {
-			sway_log(L_ERROR, "Command '%s' failed: %s", res->input, res->error);
-		}
-		free_cmd_results(res);
+		handle_binding_command(binding);
 		return true;
 	}
 
@@ -362,11 +381,7 @@ static bool handle_bindsym_release(struct sway_binding *binding) {
 	if (binding->keys->length == 1) {
 		xkb_keysym_t *key = binding->keys->items[0];
 		if (check_released_key(*key)) {
-			struct cmd_results *res = handle_command(binding->command);
-			if (res->status != CMD_SUCCESS) {
-				sway_log(L_ERROR, "Command '%s' failed: %s", res->input, res->error);
-			}
-			free_cmd_results(res);
+			handle_binding_command(binding);
 			return true;
 		}
 	}

sway/ipc-server.c

@@ -298,6 +298,10 @@ void ipc_client_handle_command(struct ipc_client *client) {
 				client->subscribed_events |= IPC_EVENT_MODE;
 			} else if (strcmp(event_type, "modifier") == 0) {
 				client->subscribed_events |= IPC_EVENT_MODIFIER;
+#if SWAY_BINDING_EVENT
+			} else if (strcmp(event_type, "binding") == 0) {
+				client->subscribed_events |= IPC_EVENT_BINDING;
+#endif
 			} else {
 				ipc_send_reply(client, "{\"success\": false}", 18);
 				ipc_client_disconnect(client);
@@ -633,3 +637,52 @@ void ipc_event_modifier(uint32_t modifier, const char *state) {
 
 	json_object_put(obj); // free
 }
+
+#if SWAY_BINDING_EVENT
+static void ipc_event_binding(json_object *sb_obj) {
+	json_object *obj = json_object_new_object();
+	json_object_object_add(obj, "change", json_object_new_string("run"));
+	json_object_object_add(obj, "binding", sb_obj);
+
+	const char *json_string = json_object_to_json_string(obj);
+	ipc_send_event(json_string, IPC_EVENT_BINDING);
+
+	json_object_put(obj); // free
+}
+#endif
+
+void ipc_event_binding_keyboard(struct sway_binding *sb) {
+#if SWAY_BINDING_EVENT
+	json_object *sb_obj = json_object_new_object();
+	json_object_object_add(sb_obj, "command", json_object_new_string(sb->command));
+
+	const char *names[10];
+
+	int len = get_modifier_names(names, sb->modifiers);
+	int i;
+	json_object *modifiers = json_object_new_array();
+	for (i = 0; i < len; ++i) {
+		json_object_array_add(modifiers, json_object_new_string(names[i]));
+	}
+
+	json_object_object_add(sb_obj, "event_state_mask", modifiers);
+
+	// TODO: implement bindcode
+	json_object_object_add(sb_obj, "input_code", json_object_new_int(0));
+
+	json_object *symbols = json_object_new_array();
+	uint32_t keysym;
+	char buffer[64];
+	for (i = 0; i < sb->keys->length; ++i) {
+		keysym = *(uint32_t *)sb->keys->items[i];
+		if (xkb_keysym_get_name(keysym, buffer, 64) > 0) {
+			json_object_array_add(symbols, json_object_new_string(buffer));
+		}
+	}
+
+	json_object_object_add(sb_obj, "symbols", symbols);
+	json_object_object_add(sb_obj, "input_type", json_object_new_string("keyboard"));
+
+	ipc_event_binding(sb_obj);
+#endif
+}