Fix modifiers handling, add wlr_keyboard_get_modifiers

include/wlr/types/wlr_keyboard.h

@@ -6,13 +6,16 @@
 #include <wayland-server.h>
 #include <xkbcommon/xkbcommon.h>
 
+#define WLR_LED_COUNT 3
+
 enum wlr_keyboard_led {
 	WLR_LED_NUM_LOCK = 1,
 	WLR_LED_CAPS_LOCK = 2,
 	WLR_LED_SCROLL_LOCK = 4,
-	WLR_LED_LAST
 };
 
+#define WLR_MODIFIER_COUNT 8
+
 enum wlr_keyboard_modifier {
 	WLR_MODIFIER_SHIFT = 1,
 	WLR_MODIFIER_CAPS = 2,
@@ -22,7 +25,6 @@ enum wlr_keyboard_modifier {
 	WLR_MODIFIER_MOD3 = 32,
 	WLR_MODIFIER_LOGO = 64,
 	WLR_MODIFIER_MOD5 = 128,
-	WLR_MODIFIER_LAST
 };
 
 struct wlr_keyboard_impl;
@@ -35,8 +37,8 @@ struct wlr_keyboard {
 	size_t keymap_size;
 	struct xkb_keymap *keymap;
 	struct xkb_state *xkb_state;
-	xkb_led_index_t led_indexes[WLR_LED_LAST];
+	xkb_led_index_t led_indexes[WLR_LED_COUNT];
-	xkb_mod_index_t mod_indexes[WLR_MODIFIER_LAST];
+	xkb_mod_index_t mod_indexes[WLR_MODIFIER_COUNT];
 
 	struct {
 		xkb_mod_mask_t depressed;
@@ -53,8 +55,6 @@ struct wlr_keyboard {
 	void *data;
 };
 
-void wlr_keyboard_led_update(struct wlr_keyboard *keyboard, uint32_t leds);
-
 enum wlr_key_state {
 	WLR_KEY_RELEASED,
 	WLR_KEY_PRESSED,
@@ -69,5 +69,7 @@ struct wlr_event_keyboard_key {
 
 void wlr_keyboard_set_keymap(struct wlr_keyboard *kb,
 	struct xkb_keymap *keymap);
+void wlr_keyboard_led_update(struct wlr_keyboard *keyboard, uint32_t leds);
+uint32_t wlr_keyboard_get_modifiers(struct wlr_keyboard *keyboard);
 
 #endif

types/wlr_keyboard.c

@@ -12,7 +12,7 @@ int os_create_anonymous_file(off_t size);
 
 static void keyboard_led_update(struct wlr_keyboard *keyboard) {
 	uint32_t leds = 0;
-	for (uint32_t i = 0; i < WLR_LED_LAST; ++i) {
+	for (uint32_t i = 0; i < WLR_LED_COUNT; ++i) {
 		if (xkb_state_led_index_is_active(keyboard->xkb_state,
 				keyboard->led_indexes[i])) {
 			leds |= (1 << i);
@@ -21,37 +21,12 @@ static void keyboard_led_update(struct wlr_keyboard *keyboard) {
 	wlr_keyboard_led_update(keyboard, leds);
 }
 
-static void keyboard_modifier_update(struct wlr_keyboard *keyboard) {
-	xkb_mod_mask_t depressed = xkb_state_serialize_mods(keyboard->xkb_state,
-		XKB_STATE_DEPRESSED);
-	xkb_mod_mask_t latched = xkb_state_serialize_mods(keyboard->xkb_state,
-		XKB_STATE_LATCHED);
-	xkb_mod_mask_t locked = xkb_state_serialize_mods(keyboard->xkb_state,
-		XKB_STATE_LOCKED);
-	xkb_mod_mask_t group = xkb_state_serialize_layout(keyboard->xkb_state,
-		XKB_STATE_LAYOUT_EFFECTIVE);
-	if (depressed == keyboard->modifiers.depressed &&
-			latched == keyboard->modifiers.latched &&
-			locked == keyboard->modifiers.locked &&
-			group == keyboard->modifiers.group) {
-		return;
-	}
-
-	keyboard->modifiers.depressed = depressed;
-	keyboard->modifiers.latched = latched;
-	keyboard->modifiers.locked = locked;
-	keyboard->modifiers.group = group;
-
-	// TODO: wl_keyboard_send_modifiers
-}
-
 void wlr_keyboard_update_state(struct wlr_keyboard *keyboard,
 		struct wlr_event_keyboard_key *event) {
 	uint32_t keycode = event->keycode + 8;
 	xkb_state_update_key(keyboard->xkb_state, keycode,
 		event->state == WLR_KEY_PRESSED ? XKB_KEY_DOWN : XKB_KEY_UP);
 	keyboard_led_update(keyboard);
-	keyboard_modifier_update(keyboard);
 	wl_signal_emit(&keyboard->events.key, event);
 }
 
@@ -84,16 +59,16 @@ void wlr_keyboard_set_keymap(struct wlr_keyboard *kb,
 	kb->keymap = keymap;
 	assert(kb->xkb_state = xkb_state_new(kb->keymap));
 
-	const char *led_names[WLR_LED_LAST] = {
+	const char *led_names[WLR_LED_COUNT] = {
 		XKB_LED_NAME_NUM,
 		XKB_LED_NAME_CAPS,
-		XKB_LED_NAME_SCROLL
+		XKB_LED_NAME_SCROLL,
 	};
-	for (size_t i = 0; i < WLR_LED_LAST; ++i) {
+	for (size_t i = 0; i < WLR_LED_COUNT; ++i) {
 		kb->led_indexes[i] = xkb_map_led_get_index(kb->keymap, led_names[i]);
 	}
 
-	const char *mod_names[WLR_MODIFIER_LAST] = {
+	const char *mod_names[WLR_MODIFIER_COUNT] = {
 		XKB_MOD_NAME_SHIFT,
 		XKB_MOD_NAME_CAPS,
 		XKB_MOD_NAME_CTRL, // "Control"
@@ -104,7 +79,7 @@ void wlr_keyboard_set_keymap(struct wlr_keyboard *kb,
 		"Mod5",
 	};
 	// TODO: there's also "Ctrl", "Alt"?
-	for (size_t i = 0; i < WLR_LED_LAST; ++i) {
+	for (size_t i = 0; i < WLR_MODIFIER_COUNT; ++i) {
 		kb->mod_indexes[i] = xkb_map_mod_get_index(kb->keymap, mod_names[i]);
 	}
 
@@ -119,3 +94,15 @@ void wlr_keyboard_set_keymap(struct wlr_keyboard *kb,
 
 	wl_signal_emit(&kb->events.keymap, kb);
 }
+
+uint32_t wlr_keyboard_get_modifiers(struct wlr_keyboard *kb) {
+	xkb_mod_mask_t mask = kb->modifiers.depressed | kb->modifiers.latched;
+	uint32_t modifiers = 0;
+	for (size_t i = 0; i < WLR_MODIFIER_COUNT; ++i) {
+		if (kb->mod_indexes[i] != XKB_MOD_INVALID &&
+				(mask & (1 << kb->mod_indexes[i]))) {
+			modifiers |= (1 << i);
+		}
+	}
+	return modifiers;
+}

types/wlr_seat.c

@@ -402,19 +402,29 @@ static void keyboard_key_notify(struct wl_listener *listener, void *data) {
 		handle->seat_keyboard = seat_kb;
 	}
 
-	uint32_t depressed = xkb_state_serialize_mods(keyboard->xkb_state,
+	xkb_mod_mask_t depressed = xkb_state_serialize_mods(keyboard->xkb_state,
 		XKB_STATE_MODS_DEPRESSED);
-	uint32_t latched = xkb_state_serialize_mods(keyboard->xkb_state,
+	xkb_mod_mask_t latched = xkb_state_serialize_mods(keyboard->xkb_state,
 		XKB_STATE_MODS_LATCHED);
-	uint32_t locked = xkb_state_serialize_mods(keyboard->xkb_state,
+	xkb_mod_mask_t locked = xkb_state_serialize_mods(keyboard->xkb_state,
 		XKB_STATE_MODS_LOCKED);
-	uint32_t group = xkb_state_serialize_layout(keyboard->xkb_state,
+	xkb_mod_mask_t group = xkb_state_serialize_layout(keyboard->xkb_state,
 		XKB_STATE_LAYOUT_EFFECTIVE);
+	if (depressed != keyboard->modifiers.depressed ||
+			latched != keyboard->modifiers.latched ||
+			locked != keyboard->modifiers.locked ||
+			group != keyboard->modifiers.group) {
+		keyboard->modifiers.depressed = depressed;
+		keyboard->modifiers.latched = latched;
+		keyboard->modifiers.locked = locked;
+		keyboard->modifiers.group = group;
 
 		uint32_t modifiers_serial = wl_display_next_serial(seat->display);
+		wl_keyboard_send_modifiers(handle->keyboard, modifiers_serial, depressed,
+			latched, locked, group);
+	}
+
 	uint32_t key_serial = wl_display_next_serial(seat->display);
-	wl_keyboard_send_modifiers(handle->keyboard, modifiers_serial,
-		depressed, latched, locked, group);
 	wl_keyboard_send_key(handle->keyboard, key_serial,
 		(uint32_t)event->time_usec, event->keycode, key_state);
 }