implement gestures

1 files changed, 169 insertions, 0 deletions

diff --git a/patches/gestures.patch b/patches/gestures.patch
new file mode 100644
index 0000000..4f74325
--- /dev/null
+++ b/patches/gestures.patch
@@ -0,0 +1,169 @@
+From 42f97e88bd901d81b81da61c44a790b583706308 Mon Sep 17 00:00:00 2001
+From: wochap <gean.marroquin@gmail.com>
+Date: Fri, 5 Jul 2024 11:18:49 -0500
+Subject: [PATCH] implement gestures
+
+---
+ config.def.h |  9 +++++++
+ dwl.c        | 68 ++++++++++++++++++++++++++++++++++++++++++++++++++++
+ 2 files changed, 77 insertions(+)
+
+diff --git a/config.def.h b/config.def.h
+index 22d2171..8b75564 100644
+--- a/config.def.h
++++ b/config.def.h
+@@ -14,6 +14,8 @@ static const float urgentcolor[]           = COLOR(0xff0000ff);
+ /* This conforms to the xdg-protocol. Set the alpha to zero to restore the old behavior */
+ static const float fullscreen_bg[]         = {0.1f, 0.1f, 0.1f, 1.0f}; /* You can also use glsl colors */
+ 
++static const unsigned int swipe_min_threshold = 0;
++
+ /* tagging - TAGCOUNT must be no greater than 31 */
+ #define TAGCOUNT (9)
+ 
+@@ -174,3 +176,10 @@ static const Button buttons[] = {
+ 	{ MODKEY, BTN_MIDDLE, togglefloating, {0} },
+ 	{ MODKEY, BTN_RIGHT,  moveresize,     {.ui = CurResize} },
+ };
++
++static const Gesture gestures[] = {
++	// { MODKEY, SWIPE_LEFT, 4, shiftview, { .i = 1 } },
++	// { MODKEY, SWIPE_RIGHT, 4, shiftview, { .i = -1 } },
++	{ MODKEY, SWIPE_UP, 3, focusstack, {.i = 1} },
++	{ MODKEY, SWIPE_DOWN, 3, focusstack, {.i = -1} },
++};
+diff --git a/dwl.c b/dwl.c
+index ded83e2..5d861e8 100644
+--- a/dwl.c
++++ b/dwl.c
+@@ -88,6 +88,7 @@ enum { LyrBg, LyrBottom, LyrTile, LyrFloat, LyrTop, LyrFS, LyrOverlay, LyrBlock,
+ enum { NetWMWindowTypeDialog, NetWMWindowTypeSplash, NetWMWindowTypeToolbar,
+ 	NetWMWindowTypeUtility, NetLast }; /* EWMH atoms */
+ #endif
++enum { SWIPE_LEFT, SWIPE_RIGHT, SWIPE_DOWN, SWIPE_UP };
+ 
+ typedef union {
+ 	int i;
+@@ -103,6 +104,14 @@ typedef struct {
+ 	const Arg arg;
+ } Button;
+ 
++typedef struct {
++	unsigned int mod;
++	unsigned int motion;
++	unsigned int fingers_count;
++	void (*func)(const Arg *);
++	const Arg arg;
++} Gesture;
++
+ typedef struct Monitor Monitor;
+ typedef struct {
+ 	/* Must keep these three elements in this order */
+@@ -251,6 +260,7 @@ static void arrangelayer(Monitor *m, struct wl_list *list,
+ static void arrangelayers(Monitor *m);
+ static void axisnotify(struct wl_listener *listener, void *data);
+ static void buttonpress(struct wl_listener *listener, void *data);
++static int ongesture(struct wlr_pointer_swipe_end_event *event);
+ static void swipe_begin(struct wl_listener *listener, void *data);
+ static void swipe_update(struct wl_listener *listener, void *data);
+ static void swipe_end(struct wl_listener *listener, void *data);
+@@ -416,6 +426,10 @@ static struct wlr_box sgeom;
+ static struct wl_list mons;
+ static Monitor *selmon;
+ 
++static uint32_t swipe_fingers = 0;
++static double swipe_dx = 0;
++static double swipe_dy = 0;
++
+ #ifdef XWAYLAND
+ static void activatex11(struct wl_listener *listener, void *data);
+ static void associatex11(struct wl_listener *listener, void *data);
+@@ -435,6 +449,8 @@ static xcb_atom_t netatom[NetLast];
+ /* attempt to encapsulate suck into one file */
+ #include "client.h"
+ 
++static const unsigned int abzsquare = swipe_min_threshold * swipe_min_threshold;
++
+ /* function implementations */
+ void
+ applybounds(Client *c, struct wlr_box *bbox)
+@@ -657,6 +673,11 @@ swipe_begin(struct wl_listener *listener, void *data)
+ {
+ 	struct wlr_pointer_swipe_begin_event *event = data;
+ 
++	swipe_fingers = event->fingers;
++	// Reset swipe distance at the beginning of a swipe
++	swipe_dx = 0;
++	swipe_dy = 0;
++
+ 	// Forward swipe begin event to client
+ 	wlr_pointer_gestures_v1_send_swipe_begin(
+ 		pointer_gestures, 
+@@ -671,6 +692,11 @@ swipe_update(struct wl_listener *listener, void *data)
+ {
+ 	struct wlr_pointer_swipe_update_event *event = data;
+ 
++	swipe_fingers = event->fingers;
++	// Accumulate swipe distance
++	swipe_dx += event->dx;
++	swipe_dy += event->dy;
++
+ 	// Forward swipe update event to client
+ 	wlr_pointer_gestures_v1_send_swipe_update(
+ 		pointer_gestures, 
+@@ -681,11 +707,53 @@ swipe_update(struct wl_listener *listener, void *data)
+ 	);
+ }
+ 
++int
++ongesture(struct wlr_pointer_swipe_end_event *event)
++{
++	struct wlr_keyboard *keyboard;
++	uint32_t mods;
++	const Gesture *g;
++	unsigned int motion;
++	unsigned int adx = (int)round(fabs(swipe_dx));
++	unsigned int ady = (int)round(fabs(swipe_dy));
++	int handled = 0;
++
++	if (event->cancelled) {
++		return handled;
++	}
++
++	// Require absolute distance movement beyond a small thresh-hold
++	if (adx * adx + ady * ady < abzsquare) {
++		return handled;
++	}
++
++	if (adx > ady) {
++		motion = swipe_dx < 0 ? SWIPE_LEFT : SWIPE_RIGHT;
++	} else {
++		motion = swipe_dy < 0 ? SWIPE_UP : SWIPE_DOWN;
++	}
++
++	keyboard = wlr_seat_get_keyboard(seat);
++	mods = keyboard ? wlr_keyboard_get_modifiers(keyboard) : 0;
++	for (g = gestures; g < END(gestures); g++) {
++		if (CLEANMASK(mods) == CLEANMASK(g->mod) &&
++			 swipe_fingers == g->fingers_count &&
++			 motion == g->motion && g->func) {
++			g->func(&g->arg);
++			handled = 1;
++		}
++	}
++	return handled;
++}
++
+ void
+ swipe_end(struct wl_listener *listener, void *data)
+ {
+ 	struct wlr_pointer_swipe_end_event *event = data;
+ 
++	// TODO: should we stop here if the event has been handled?
++	ongesture(event);
++
+ 	// Forward swipe end event to client
+ 	wlr_pointer_gestures_v1_send_swipe_end(
+ 		pointer_gestures, 
+-- 
+2.45.1