Add modifiers support in wayland backend, parse modifiers in rootston config

backend/wayland/wl_seat.c

@@ -155,7 +155,11 @@ static void keyboard_handle_key(void *data, struct wl_keyboard *wl_keyboard,
 static void keyboard_handle_modifiers(void *data, struct wl_keyboard *wl_keyboard,
 		uint32_t serial, uint32_t mods_depressed, uint32_t mods_latched,
 		uint32_t mods_locked, uint32_t group) {
+	struct wlr_input_device *dev = data;
+	assert(dev && dev->keyboard);
 
+	wlr_keyboard_update_modifiers(dev->keyboard, mods_depressed, mods_latched,
+		mods_locked, group);
 }
 
 static void keyboard_handle_repeat_info(void *data, struct wl_keyboard *wl_keyboard,

include/rootston/config.h

@@ -19,6 +19,7 @@ struct device_config {
 };
 
 struct binding_config {
+	uint32_t modifiers;
 	xkb_keysym_t *keysyms;
 	size_t keysyms_len;
 	char *command;

include/wlr/interfaces/wlr_keyboard.h

@@ -13,5 +13,8 @@ void wlr_keyboard_init(struct wlr_keyboard *keyboard, struct wlr_keyboard_impl *
 void wlr_keyboard_destroy(struct wlr_keyboard *keyboard);
 void wlr_keyboard_update_state(struct wlr_keyboard *keyboard,
 		struct wlr_event_keyboard_key *event);
+void wlr_keyboard_update_modifiers(struct wlr_keyboard *keyboard,
+	uint32_t mods_depressed, uint32_t mods_latched, uint32_t mods_locked,
+	uint32_t group);
 
 #endif

rootston/config.c

@@ -177,28 +177,49 @@ static int config_ini_handler(void *user, const char *section, const char *name,
 
 		bc->command = strdup(value);
 
-		bc->keysyms_len = 1;
+		size_t keysyms_len = 1;
 		char *symnames = strdup(name);
 		for (char *c = symnames; *c != '\0'; c++) {
 			if (*c == '+') {
 				*c = '\0';
-				bc->keysyms_len++;
+				keysyms_len++;
 			}
 		}
 
-		bc->keysyms = calloc(1, bc->keysyms_len * sizeof(xkb_keysym_t));
+		// TODO: bc->keysyms is larger than needed
+		bc->keysyms = calloc(1, keysyms_len * sizeof(xkb_keysym_t));
 		char *symname = symnames;
-		for (size_t i = 0; i < bc->keysyms_len; i++) {
+		for (size_t i = 0; i < keysyms_len; i++) {
+			if (strcmp(symname, "Shift") == 0) {
+				bc->modifiers |= WLR_MODIFIER_SHIFT;
+			} else if (strcmp(symname, "Caps") == 0) {
+				bc->modifiers |= WLR_MODIFIER_CAPS;
+			} else if (strcmp(symname, "Ctrl") == 0) {
+				bc->modifiers |= WLR_MODIFIER_CTRL;
+			} else if (strcmp(symname, "Alt") == 0) {
+				bc->modifiers |= WLR_MODIFIER_ALT;
+			} else if (strcmp(symname, "Mod2") == 0) {
+				bc->modifiers |= WLR_MODIFIER_MOD2;
+			} else if (strcmp(symname, "Mod3") == 0) {
+				bc->modifiers |= WLR_MODIFIER_MOD3;
+			} else if (strcmp(symname, "Logo") == 0) {
+				bc->modifiers |= WLR_MODIFIER_LOGO;
+			} else if (strcmp(symname, "Mod5") == 0) {
+				bc->modifiers |= WLR_MODIFIER_MOD5;
+			} else {
 				xkb_keysym_t sym = xkb_keysym_from_name(symname,
 					XKB_KEYSYM_NO_FLAGS);
 				if (sym == XKB_KEY_NoSymbol) {
-				wlr_log(L_ERROR, "got unknown key binding symbol: %s", symname);
+					wlr_log(L_ERROR, "got unknown key binding symbol: %s",
+						symname);
 					wl_list_remove(&bc->link);
 					free(bc->keysyms);
 					free(bc);
 					break;
 				}
-			bc->keysyms[i] = sym;
+				bc->keysyms[bc->keysyms_len] = sym;
+				bc->keysyms_len++;
+			}
 			symname += strlen(symname) + 1;
 		}
 
@@ -249,6 +270,7 @@ struct roots_config *parse_args(int argc, char *argv[]) {
 		struct binding_config *bc = calloc(1, sizeof(struct binding_config));
 		wl_list_insert(&config->bindings, &bc->link);
 		bc->command = strdup("exit");
+		bc->modifiers = WLR_MODIFIER_LOGO;
 		bc->keysyms_len = 2;
 		bc->keysyms = calloc(1, bc->keysyms_len * sizeof(xkb_keysym_t));
 		bc->keysyms[0] = XKB_KEY_Meta_L;

rootston/keyboard.c

@@ -61,9 +61,14 @@ static void keyboard_keysym_press(struct roots_keyboard *keyboard,
 		return;
 	}
 
+	uint32_t modifiers = wlr_keyboard_get_modifiers(keyboard->device->keyboard);
 	struct wl_list *bindings = &keyboard->input->server->config->bindings;
 	struct binding_config *bc;
 	wl_list_for_each(bc, bindings, link) {
+		if (modifiers ^ bc->modifiers) {
+			continue;
+		}
+
 		bool ok = true;
 		for (size_t i = 0; i < bc->keysyms_len; i++) {
 			ssize_t j = keyboard_pressed_keysym_index(keyboard, bc->keysyms[i]);

types/wlr_keyboard.c

@@ -30,6 +30,15 @@ void wlr_keyboard_update_state(struct wlr_keyboard *keyboard,
 	wl_signal_emit(&keyboard->events.key, event);
 }
 
+void wlr_keyboard_update_modifiers(struct wlr_keyboard *keyboard,
+		uint32_t mods_depressed, uint32_t mods_latched, uint32_t mods_locked,
+		uint32_t group) {
+	keyboard->modifiers.depressed = mods_depressed;
+	keyboard->modifiers.latched = mods_latched;
+	keyboard->modifiers.locked = mods_locked;
+	keyboard->modifiers.group = group;
+}
+
 void wlr_keyboard_init(struct wlr_keyboard *kb,
 		struct wlr_keyboard_impl *impl) {
 	kb->impl = impl;