software_builds/dwl/patches/unclutter.patch

From 00e76d7ab7be57c8f514a8aa9d2337e55cd67b47 Mon Sep 17 00:00:00 2001
From: Guido Cella <guido@guidocella.xyz>
Date: Sat, 12 Feb 2022 20:29:09 +0100
Subject: [PATCH] =?UTF-8?q?Hide=20the=20mouse=20cursor=20if=20it=20isn?=
 =?UTF-8?q?=E2=80=99t=20being=20used?=
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---
 config.def.h |  2 ++
 dwl.c        | 41 +++++++++++++++++++++++++++++++++++++----
 2 files changed, 39 insertions(+), 4 deletions(-)

diff --git a/config.def.h b/config.def.h
index 84086594..10b463e1 100644
--- a/config.def.h
+++ b/config.def.h
@@ -51,6 +51,8 @@ static const int repeat_delay = 600;
 static const int tap_to_click = 1;
 static const int natural_scrolling = 0;
 
+static const int cursor_timeout = 5;
+
 #define MODKEY WLR_MODIFIER_ALT
 #define TAGKEYS(KEY,SKEY,TAG) \
 	{ MODKEY,                    KEY,            view,            {.ui = 1 << TAG} }, \
diff --git a/dwl.c b/dwl.c
index 01f51ad9..e6a5382b 100644
--- a/dwl.c
+++ b/dwl.c
@@ -232,6 +232,8 @@ static void focusmon(const Arg *arg);
 static void focusstack(const Arg *arg);
 static void fullscreennotify(struct wl_listener *listener, void *data);
 static Client *focustop(Monitor *m);
+static void handlecursoractivity();
+static int hidecursor(void *data);
 static void incnmaster(const Arg *arg);
 static void inputdevice(struct wl_listener *listener, void *data);
 static int keybinding(uint32_t mods, xkb_keysym_t sym);
@@ -310,6 +312,8 @@ static struct wlr_virtual_keyboard_manager_v1 *virtual_keyboard_mgr;
 
 static struct wlr_cursor *cursor;
 static struct wlr_xcursor_manager *cursor_mgr;
+static struct wl_event_source *hide_source;
+static bool cursor_hidden = false;
 
 static struct wlr_seat *seat;
 static struct wl_list keyboards;
@@ -603,6 +607,7 @@ axisnotify(struct wl_listener *listener, void *data)
 	 * for example when you move the scroll wheel. */
 	struct wlr_event_pointer_axis *event = data;
 	wlr_idle_notify_activity(idle, seat);
+	handlecursoractivity();
 	/* Notify the client with pointer focus of the axis event. */
 	wlr_seat_pointer_notify_axis(seat,
 			event->time_msec, event->orientation, event->delta,
@@ -619,6 +624,7 @@ buttonpress(struct wl_listener *listener, void *data)
 	const Button *b;
 
 	wlr_idle_notify_activity(idle, seat);
+	handlecursoractivity();
 
 	switch (event->state) {
 	case WLR_BUTTON_PRESSED:
@@ -1191,6 +1197,25 @@ focustop(Monitor *m)
 	return NULL;
 }
 
+void
+handlecursoractivity()
+{
+	wl_event_source_timer_update(hide_source, cursor_timeout * 1000);
+	if (cursor_hidden) {
+		wlr_xcursor_manager_set_cursor_image(cursor_mgr, "left_ptr", cursor);
+		cursor_hidden = false;
+	}
+}
+
+int
+hidecursor(void *data)
+{
+	wlr_cursor_set_image(cursor, NULL, 0, 0, 0, 0, 0, 0);
+	wlr_seat_pointer_notify_clear_focus(seat);
+	cursor_hidden = true;
+	return 1;
+}
+
 void
 incnmaster(const Arg *arg)
 {
@@ -1401,6 +1426,7 @@ motionnotify(uint32_t time)
 	/* time is 0 in internal calls meant to restore pointer focus. */
 	if (time) {
 		wlr_idle_notify_activity(idle, seat);
+		handlecursoractivity();
 
 		/* Update selmon (even while dragging a window) */
 		if (sloppyfocus)
@@ -1558,10 +1584,13 @@ pointerfocus(Client *c, struct wlr_surface *surface, double sx, double sy,
 		time = now.tv_sec * 1000 + now.tv_nsec / 1000000;
 	}
 
-	/* Let the client know that the mouse cursor has entered one
-	 * of its surfaces, and make keyboard focus follow if desired.
-	 * wlroots makes this a no-op if surface is already focused */
-	wlr_seat_pointer_notify_enter(seat, surface, sx, sy);
+	if (!cursor_hidden)
+		wlr_seat_pointer_notify_enter(seat, surface, sx, sy);
+	// wlr_seat_pointer_notify_enter seems to always show the cursor when
+	// calling this to restore pointer focus while mapping and unmapping layer
+	// surfaces. Not sure how sway makes it work, but you're unlikely to care
+	// about which surface has pointer focus in this case as you don't know
+	// where you're clicking until you show the cursor again.
 	wlr_seat_pointer_notify_motion(seat, time, sx, sy);
 
 }
@@ -1711,6 +1740,7 @@ run(char *startup_cmd)
 	 * monitor when displayed here */
 	wlr_cursor_warp_closest(cursor, NULL, cursor->x, cursor->y);
 	wlr_xcursor_manager_set_cursor_image(cursor_mgr, "left_ptr", cursor);
+	handlecursoractivity();
 
 	/* Run the Wayland event loop. This does not return until you exit the
 	 * compositor. Starting the backend rigged up all of the necessary event
@@ -1959,6 +1989,9 @@ setup(void)
 	wl_signal_add(&cursor->events.axis, &cursor_axis);
 	wl_signal_add(&cursor->events.frame, &cursor_frame);
 
+	hide_source = wl_event_loop_add_timer(wl_display_get_event_loop(dpy),
+			hidecursor, cursor);
+
 	/*
 	 * Configures a seat, which is a single "seat" at which a user sits and
 	 * operates the computer. This conceptually includes up to one keyboard,