From 8fd10973586e774fb83cc540e3b7a033bec2ca73 Mon Sep 17 00:00:00 2001
From: Ben Collerson <benc@benc.cc>
Date: Thu, 4 Jan 2024 20:30:01 +1000
Subject: [PATCH] warpcursor

---
 dwl.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/dwl.c b/dwl.c
index bf763dfc..6bad7d51 100644
--- a/dwl.c
+++ b/dwl.c
@@ -343,6 +343,7 @@ static void urgent(struct wl_listener *listener, void *data);
 static void view(const Arg *arg);
 static void virtualkeyboard(struct wl_listener *listener, void *data);
 static void virtualpointer(struct wl_listener *listener, void *data);
+static void warpcursor(const Client *c);
 static Monitor *xytomon(double x, double y);
 static void xytonode(double x, double y, struct wlr_surface **psurface,
 		Client **pc, LayerSurface **pl, double *nx, double *ny);
@@ -497,6 +498,7 @@ arrange(Monitor *m)
 		m->lt[m->sellt]->arrange(m);
 	motionnotify(0, NULL, 0, 0, 0, 0);
 	checkidleinhibitor(NULL);
+	warpcursor(c);
 }
 
 void
@@ -1244,6 +1246,9 @@ focusclient(Client *c, int lift)
 	if (locked)
 		return;
 
+	/* Warp cursor to center of client if it is outside */
+	warpcursor(c);
+
 	/* Raise client in stacking order if requested */
 	if (c && lift)
 		wlr_scene_node_raise_to_top(&c->scene->node);
@@ -1344,6 +1349,7 @@ focusstack(const Arg *arg)
 	}
 	/* If only one client is visible on selmon, then c == sel */
 	focusclient(c, 1);
+	warpcursor(focustop(selmon));
 }
 
 /* We probably should change the name of this, it sounds like
@@ -2858,6 +2864,27 @@ virtualpointer(struct wl_listener *listener, void *data)
 		wlr_cursor_map_input_to_output(cursor, &pointer.base, event->suggested_output);
 }
 
+void
+warpcursor(const Client *c) {
+	if (cursor_mode != CurNormal) {
+		return;
+	}
+	if (!c && selmon) {
+		wlr_cursor_warp_closest(cursor,
+			  NULL,
+			  selmon->w.x + selmon->w.width / 2.0 ,
+			  selmon->w.y + selmon->w.height / 2.0);
+	}
+	else if ( c && (cursor->x < c->geom.x ||
+		cursor->x > c->geom.x + c->geom.width ||
+		cursor->y < c->geom.y ||
+		cursor->y > c->geom.y + c->geom.height))
+		wlr_cursor_warp_closest(cursor,
+			  NULL,
+			  c->geom.x + c->geom.width / 2.0,
+			  c->geom.y + c->geom.height / 2.0);
+}
+
 Monitor *
 xytomon(double x, double y)
 {
-- 
2.43.0