view: Add view_move_to_front/back().

This avoids calling view->impl functions from cursor.c and desktop.c.

v2: Add an explicit recursion guard in cursor_update_focus().

src/action.c

@@ -439,12 +439,12 @@ actions_run(struct view *activator, struct server *server,
 			break;
 		case ACTION_TYPE_RAISE:
 			if (view) {
-				desktop_move_to_front(view);
+				view_move_to_front(view);
 			}
 			break;
 		case ACTION_TYPE_LOWER:
 			if (view) {
-				desktop_move_to_back(view);
+				view_move_to_back(view);
 			}
 			break;
 		case ACTION_TYPE_RESIZE:

src/cursor.c

@@ -481,7 +481,7 @@ process_cursor_motion(struct server *server, uint32_t time)
 	if (ctx.view && rc.focus_follow_mouse) {
 		desktop_focus_and_activate_view(seat, ctx.view);
 		if (rc.raise_on_focus) {
-			desktop_move_to_front(ctx.view);
+			view_move_to_front(ctx.view);
 		}
 	}
 
@@ -510,8 +510,8 @@ msec(const struct timespec *t)
 	return t->tv_sec * 1000 + t->tv_nsec / 1000000;
 }
 
-void
-cursor_update_focus(struct server *server)
+static void
+_cursor_update_focus(struct server *server)
 {
 	struct timespec now;
 	clock_gettime(CLOCK_MONOTONIC, &now);
@@ -523,12 +523,7 @@ cursor_update_focus(struct server *server)
 		/* Prevent changing keyboard focus during A-Tab */
 		desktop_focus_and_activate_view(&server->seat, ctx.view);
 		if (rc.raise_on_focus) {
-			/*
-			 * Call view method directly as desktop_move_to_front()
-			 * contains a call to cursor_update_focus() and thus
-			 * loops inifinitely
-			 */
-			ctx.view->impl->move_to_front(ctx.view);
+			view_move_to_front(ctx.view);
 		}
 	}
 
@@ -536,6 +531,18 @@ cursor_update_focus(struct server *server)
 		/*cursor_has_moved*/ false);
 }
 
+void
+cursor_update_focus(struct server *server)
+{
+	/* Prevent recursion via view_move_to_front() */
+	static bool updating_focus = false;
+	if (!updating_focus) {
+		updating_focus = true;
+		_cursor_update_focus(server);
+		updating_focus = false;
+	}
+}
+
 static void
 handle_constraint_commit(struct wl_listener *listener, void *data)
 {

src/desktop.c

@@ -12,30 +12,6 @@
 #include "workspaces.h"
 #include "xwayland.h"
 
-void
-desktop_move_to_front(struct view *view)
-{
-	if (!view) {
-		return;
-	}
-	if (view->impl->move_to_front) {
-		view->impl->move_to_front(view);
-		cursor_update_focus(view->server);
-	}
-}
-
-void
-desktop_move_to_back(struct view *view)
-{
-	if (!view) {
-		return;
-	}
-	if (view->impl->move_to_back) {
-		view->impl->move_to_back(view);
-		cursor_update_focus(view->server);
-	}
-}
-
 void
 desktop_arrange_all_views(struct server *server)
 {
@@ -267,7 +243,9 @@ desktop_focus_topmost_mapped_view(struct server *server)
 {
 	struct view *view = topmost_mapped_view(server);
 	desktop_focus_and_activate_view(&server->seat, view);
-	desktop_move_to_front(view);
+	if (view) {
+		view_move_to_front(view);
+	}
 }
 
 void

src/foreign.c

@@ -38,7 +38,7 @@ handle_request_activate(struct wl_listener *listener, void *data)
 		workspaces_switch_to(view->workspace);
 	}
 	desktop_focus_and_activate_view(&view->server->seat, view);
-	desktop_move_to_front(view);
+	view_move_to_front(view);
 }
 
 static void

src/keyboard.c

@@ -40,7 +40,9 @@ static void
 end_cycling(struct server *server)
 {
 	desktop_focus_and_activate_view(&server->seat, server->osd_state.cycle_view);
-	desktop_move_to_front(server->osd_state.cycle_view);
+	if (server->osd_state.cycle_view) {
+		view_move_to_front(server->osd_state.cycle_view);
+	}
 
 	/* osd_finish() additionally resets cycle_view to NULL */
 	osd_finish(server);

src/view-impl-common.c

@@ -27,7 +27,7 @@ void
 view_impl_map(struct view *view)
 {
 	desktop_focus_and_activate_view(&view->server->seat, view);
-	desktop_move_to_front(view);
+	view_move_to_front(view);
 	view_update_title(view);
 	view_update_app_id(view);
 }

src/view.c

@@ -982,6 +982,26 @@ view_snap_to_region(struct view *view, struct region *region,
 	view_apply_region_geometry(view);
 }
 
+void
+view_move_to_front(struct view *view)
+{
+	assert(view);
+	if (view->impl->move_to_front) {
+		view->impl->move_to_front(view);
+		cursor_update_focus(view->server);
+	}
+}
+
+void
+view_move_to_back(struct view *view)
+{
+	assert(view);
+	if (view->impl->move_to_back) {
+		view->impl->move_to_back(view);
+		cursor_update_focus(view->server);
+	}
+}
+
 const char *
 view_get_string_prop(struct view *view, const char *prop)
 {

src/xdg.c

@@ -495,7 +495,7 @@ xdg_activation_handle_request(struct wl_listener *listener, void *data)
 		workspaces_switch_to(view->workspace);
 	}
 	desktop_focus_and_activate_view(&view->server->seat, view);
-	desktop_move_to_front(view);
+	view_move_to_front(view);
 }
 
 /*

src/xwayland.c

@@ -270,7 +270,7 @@ handle_request_activate(struct wl_listener *listener, void *data)
 		wl_container_of(listener, xwayland_view, request_activate);
 	struct view *view = &xwayland_view->base;
 	desktop_focus_and_activate_view(&view->server->seat, view);
-	desktop_move_to_front(view);
+	view_move_to_front(view);
 }
 
 static void