keyboard: add keyboard_get_all_modifiers()

And make mousebind handlers use that one.
Also remove keyboard_any_modifiers_pressed() and replace its usage
with the new function.

Without this patch we would only request the modifier state of the
keyboard group which makes mousebinds involving keyboard modifiers
break for virtual keyboards like when using wayvnc. Same story for
hiding the workspace overlay or snapping to regions.

Fixes: #2511

include/input/keyboard.h

@@ -22,6 +22,6 @@ void keyboard_update_layout(struct seat *seat, xkb_layout_index_t layout);
 void keyboard_cancel_keybind_repeat(struct keyboard *keyboard);
 void keyboard_cancel_all_keybind_repeats(struct seat *seat);
 
-bool keyboard_any_modifiers_pressed(struct wlr_keyboard *keyboard);
+uint32_t keyboard_get_all_modifiers(struct seat *seat);
 
 #endif /* LABWC_KEYBOARD_H */

src/input/cursor.c

@@ -17,9 +17,10 @@
 #include "dnd.h"
 #include "idle.h"
 #include "input/gestures.h"
-#include "input/touch.h"
+#include "input/keyboard.h"
 #include "input/tablet.h"
 #include "input/tablet-tool.h"
+#include "input/touch.h"
 #include "labwc.h"
 #include "layers.h"
 #include "menu/menu.h"
@@ -892,9 +893,7 @@ handle_release_mousebinding(struct server *server,
 	}
 
 	struct mousebind *mousebind;
-
-	uint32_t modifiers = wlr_keyboard_get_modifiers(
-			&server->seat.keyboard_group->keyboard);
+	uint32_t modifiers = keyboard_get_all_modifiers(&server->seat);
 
 	wl_list_for_each(mousebind, &rc.mousebinds, link) {
 		if (ssd_part_contains(mousebind->context, ctx->type)
@@ -961,9 +960,7 @@ handle_press_mousebinding(struct server *server, struct cursor_context *ctx,
 	struct mousebind *mousebind;
 	bool double_click = is_double_click(rc.doubleclick_time, button, ctx);
 	bool consumed_by_frame_context = false;
-
-	uint32_t modifiers = wlr_keyboard_get_modifiers(
-			&server->seat.keyboard_group->keyboard);
+	uint32_t modifiers = keyboard_get_all_modifiers(&server->seat);
 
 	wl_list_for_each(mousebind, &rc.mousebinds, link) {
 		if (ssd_part_contains(mousebind->context, ctx->type)
@@ -1287,9 +1284,7 @@ handle_cursor_axis(struct server *server, struct cursor_context *ctx,
 {
 	struct mousebind *mousebind;
 	bool handled = false;
-
-	uint32_t modifiers = wlr_keyboard_get_modifiers(
-			&server->seat.keyboard_group->keyboard);
+	uint32_t modifiers = keyboard_get_all_modifiers(&server->seat);
 
 	enum direction direction = LAB_DIRECTION_INVALID;
 	if (event->orientation == WL_POINTER_AXIS_HORIZONTAL_SCROLL) {

src/input/keyboard.c

@@ -54,17 +54,30 @@ change_vt(struct server *server, unsigned int vt)
 	wlr_session_change_vt(server->session, vt);
 }
 
-bool
-keyboard_any_modifiers_pressed(struct wlr_keyboard *keyboard)
+uint32_t
+keyboard_get_all_modifiers(struct seat *seat)
 {
-	xkb_mod_index_t i;
-	for (i = 0; i < xkb_keymap_num_mods(keyboard->keymap); i++) {
-		if (xkb_state_mod_index_is_active(keyboard->xkb_state,
-				i, XKB_STATE_MODS_DEPRESSED)) {
-			return true;
+	/*
+	 * As virtual keyboards like used by wayvnc are not part of the keyboard group,
+	 * we need to additionally get the modifiers of the virtual keyboards in addition
+	 * to the physical ones in the keyboard group. This ensures that mousebinds with
+	 * keyboard modifiers are detected correctly when using for example a VNC client
+	 * via wayvnc to control labwc. This function also gets called to decide when to
+	 * hide the window switcher and workspace OSDs and to indicate if the user wants
+	 * to snap a window to a region during a window move operation.
+	 */
+	struct input *input;
+	uint32_t modifiers = wlr_keyboard_get_modifiers(&seat->keyboard_group->keyboard);
+	wl_list_for_each(input, &seat->inputs, link) {
+		if (input->wlr_input_device->type != WLR_INPUT_DEVICE_KEYBOARD) {
+			continue;
+		}
+		struct keyboard *kb = wl_container_of(input, kb, base);
+		if (kb->is_virtual) {
+			modifiers |= wlr_keyboard_get_modifiers(kb->wlr_keyboard);
 		}
 	}
-	return false;
+	return modifiers;
 }
 
 static void
@@ -139,7 +152,7 @@ keyboard_modifiers_notify(struct wl_listener *listener, void *data)
 					== LAB_INPUT_STATE_WINDOW_SWITCHER;
 
 	if (window_switcher_active || seat->workspace_osd_shown_by_modifier) {
-		if (!keyboard_any_modifiers_pressed(wlr_keyboard)) {
+		if (!keyboard_get_all_modifiers(seat)) {
 			if (window_switcher_active) {
 				if (key_state_nr_bound_keys()) {
 					should_cancel_cycling_on_next_key_release = true;

src/interactive.c

@@ -95,8 +95,7 @@ interactive_begin(struct view *view, enum input_mode mode, uint32_t edges)
 		}
 
 		/* Prevent region snapping when just moving via A-Left mousebind */
-		struct wlr_keyboard *keyboard = &seat->keyboard_group->keyboard;
-		seat->region_prevent_snap = keyboard_any_modifiers_pressed(keyboard);
+		seat->region_prevent_snap = keyboard_get_all_modifiers(seat);
 
 		cursor_shape = LAB_CURSOR_GRAB;
 		break;

src/regions.c

@@ -25,8 +25,7 @@ regions_should_snap(struct server *server)
 		return false;
 	}
 
-	struct wlr_keyboard *keyboard = &server->seat.keyboard_group->keyboard;
-	return keyboard_any_modifiers_pressed(keyboard);
+	return keyboard_get_all_modifiers(&server->seat);
 }
 
 struct region *

src/workspaces.c

@@ -287,8 +287,7 @@ _osd_show(struct server *server)
 			wlr_scene_node_set_enabled(&output->workspace_osd->node, true);
 		}
 	}
-	struct wlr_keyboard *keyboard = &server->seat.keyboard_group->keyboard;
-	if (keyboard_any_modifiers_pressed(keyboard)) {
+	if (keyboard_get_all_modifiers(&server->seat)) {
 		/* Hidden by release of all modifiers */
 		server->seat.workspace_osd_shown_by_modifier = true;
 	} else {