Add oneshot_timeout option

docs/keyd.scdoc

@@ -543,7 +543,10 @@ any of the following options:
 
 	*chord_hold_timeout:* The length of time a chord
 	must be held before being activated. (default: 0)
+	(default: 0)
 
+	*oneshot_timeout:* If non-zero, timeout a oneshot layer
+	activation after the supplied number of milliseconds. 
 	(default: 0)
 
 *Note:* Unicode characters and key sequences are treated as macros, and

src/config.c

@@ -419,10 +419,10 @@ static void config_init(struct config *config)
 	/* In ms */
 	config->chord_interkey_timeout = 50;
 	config->chord_hold_timeout = 0;
+	config->oneshot_timeout = 0;
 
 	config->macro_timeout = 600;
 	config->macro_repeat_timeout = 50;
-
 }
 
 /* Modifies the input string */
@@ -730,6 +730,8 @@ static void parse_global_section(struct config *config, struct ini_section *sect
 			config->macro_timeout = atoi(ent->val);
 		else if (!strcmp(ent->key, "macro_sequence_timeout"))
 			config->macro_sequence_timeout = atoi(ent->val);
+		else if (!strcmp(ent->key, "oneshot_timeout"))
+			config->oneshot_timeout = atoi(ent->val);
 		else if (!strcmp(ent->key, "chord_hold_timeout"))
 			config->chord_hold_timeout = atoi(ent->val);
 		else if (!strcmp(ent->key, "chord_timeout"))

src/config.h

@@ -130,6 +130,7 @@ struct config {
 	long macro_timeout;
 	long macro_sequence_timeout;
 	long macro_repeat_timeout;
+	long oneshot_timeout;
 
 	long chord_interkey_timeout;
 	long chord_hold_timeout;

src/keyboard.c

@@ -404,6 +404,7 @@ static void clear_oneshot(struct keyboard *kbd)
 		}
 
 	kbd->oneshot_latch = 0;
+	kbd->oneshot_timeout = 0;
 }
 
 static void clear(struct keyboard *kbd)
@@ -605,6 +606,10 @@ static long process_descriptor(struct keyboard *kbd, uint8_t code,
 		} else {
 			if (kbd->oneshot_latch) {
 				kbd->layer_state[idx].oneshot = 1;
+				if (kbd->config.oneshot_timeout) {
+					kbd->oneshot_timeout = time + kbd->config.oneshot_timeout;
+					schedule_timeout(kbd, kbd->oneshot_timeout);
+				}
 			} else {
 				deactivate_layer(kbd, idx);
 				update_mods(kbd, -1, 0);
@@ -1039,6 +1044,11 @@ static long process_event(struct keyboard *kbd, uint8_t code, int pressed, long
 	if (handle_pending_key(kbd, code, pressed, time))
 		goto exit;
 
+	if (kbd->oneshot_timeout && time >= kbd->oneshot_timeout) {
+		clear_oneshot(kbd);
+		update_mods(kbd, -1, 0);
+	}
+
 	if (kbd->active_macro) {
 		if (code) {
 			kbd->active_macro = NULL;

src/keyboard.h

@@ -49,6 +49,7 @@ struct keyboard {
 	struct macro *active_macro;
 	int active_macro_layer;
 	long macro_timeout;
+	long oneshot_timeout;
 
 	long macro_repeat_interval;