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apply gestures

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Wilkenfeld 2024-07-20 01:20:22 +02:00
parent 6d3ae4d787
commit 7b68298e19
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68
dwl.c
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@ -95,6 +95,7 @@ enum { ClkTagBar, ClkLtSymbol, ClkStatus, ClkTitle, ClkClient, ClkRoot }; /* cli
enum { NetWMWindowTypeDialog, NetWMWindowTypeSplash, NetWMWindowTypeToolbar,
NetWMWindowTypeUtility, NetLast }; /* EWMH atoms */
#endif
enum { SWIPE_LEFT, SWIPE_RIGHT, SWIPE_DOWN, SWIPE_UP };
typedef union {
int i;
@ -111,6 +112,14 @@ 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 */
@ -278,6 +287,7 @@ static void buffer_destroy(struct wlr_buffer *buffer);
static bool buffer_begin_data_ptr_access(struct wlr_buffer *buffer, uint32_t flags, void **data, uint32_t *format, size_t *stride);
static void buffer_end_data_ptr_access(struct wlr_buffer *buffer);
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);
@ -453,6 +463,10 @@ 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;
static char stext[256];
static struct wl_event_source *status_event_source;
@ -481,6 +495,8 @@ 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)
@ -772,6 +788,11 @@ 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,
@ -786,6 +807,11 @@ 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,
@ -796,11 +822,53 @@ 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,

23
patches/gestures/README.md Normal file
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@ -0,0 +1,23 @@
### Description
Add swipe gestures to trigger functions, similar to [libinput-gestures](https://github.com/bulletmark/libinput-gestures/tree/master). It supports the following gestures: `SWIPE_UP`, `SWIPE_DOWN`, `SWIPE_LEFT` and `SWIPE_RIGHT`
> NOTE: It requires that you have previously applied [pointer-gestures-unstable-v1](https://codeberg.org/dwl/dwl-patches/src/branch/main/patches/pointer-gestures-unstable-v1)
```c
static const Gesture gestures[] = {
/* modifier gesture fingers_count function argument */
{ MODKEY, SWIPE_LEFT, 4, shiftview, { .i = 1 } },
{ 0, SWIPE_RIGHT, 4, shiftview, { .i = -1 } },
};
```
**NOTE:** the example above requires the following patch [shiftview](https://codeberg.org/dwl/dwl-patches/wiki/shiftview)
### Download
- [git branch](https://codeberg.org/wochap/dwl/src/branch/v0.5/gestures)
- [2024-07-09](https://codeberg.org/dwl/dwl-patches/raw/commit/13d96b51b54500dd24544cf3a73c61b7a1414bc6/patches/gestures/gestures.patch)
- [2024-04-11](https://codeberg.org/dwl/dwl-patches/raw/commit/be3735bc6a5c64ff76c200a8679453bd179be456/gestures/gestures.patch)
- [v0.5](https://codeberg.org/dwl/dwl-patches/raw/commit/655fd2916c1bcaa022ce6dcdfb370051cf64df66/gestures/gestures.patch)
### Authors
- [wochap](https://codeberg.org/wochap)

169
patches/gestures/gestures.patch Normal file
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@ -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

16
patches/pointer-gestures-unstable-v1/README.md Normal file
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@ -0,0 +1,16 @@
### Description
Forward the following events to client:
swipe_begin, swipe_update, swipe_end, pinch_begin, pinch_update and pinch_end
This patch allows you to pinch zoom in Chrome, for example. In combination with the following patches [gestures](https://codeberg.org/dwl/dwl-patches/wiki/gestures) and [shiftview](https://codeberg.org/dwl/dwl-patches/wiki/shiftview), it would allow you to switch workspaces by performing a 3-finger swipe on your touchpad.
### Download
- [git branch](https://codeberg.org/wochap/dwl/src/branch/v0.5/pointer-gestures-unstable-v1)
- [2024-07-12](https://codeberg.org/dwl/dwl-patches/raw/commit/05dbce217b676e989b0fc9e0eecf83b386ac9e07/patches/pointer-gestures-unstable-v1/pointer-gestures-unstable-v1.patch)
- [2024-07-09](https://codeberg.org/dwl/dwl-patches/raw/commit/2322f3efeae8da44227e0acc760ffd3dea153716/patches/pointer-gestures-unstable-v1/pointer-gestures-unstable-v1.patch)
- [2024-04-11](https://codeberg.org/dwl/dwl-patches/raw/commit/c676de59d51e613bd52ac46c77a24b1cac9a61a1/pointer-gestures-unstable-v1/pointer-gestures-unstable-v1.patch)
- [v0.5](https://codeberg.org/dwl/dwl-patches/raw/commit/fc4146f3068dcd46035a2a11fe9d6109a97ae6d6/pointer-gestures-unstable-v1/pointer-gestures-unstable-v1.patch)
### Authors
- [wochap](https://codeberg.org/wochap)

186
patches/pointer-gestures-unstable-v1/pointer-gestures-unstable-v1.patch Normal file
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@ -0,0 +1,186 @@
From be7e98d28fc59aab67026e7d5efdcaeb26029713 Mon Sep 17 00:00:00 2001
From: wochap <gean.marroquin@gmail.com>
Date: Fri, 12 Jul 2024 11:30:17 -0500
Subject: [PATCH] implement pointer-gestures-unstable-v1
---
dwl.c | 136 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 136 insertions(+)
diff --git a/dwl.c b/dwl.c
index dc0437e..e5805b1 100644
--- a/dwl.c
+++ b/dwl.c
@@ -38,6 +38,7 @@
#include <wlr/types/wlr_output_power_management_v1.h>
#include <wlr/types/wlr_pointer.h>
#include <wlr/types/wlr_pointer_constraints_v1.h>
+#include <wlr/types/wlr_pointer_gestures_v1.h>
#include <wlr/types/wlr_presentation_time.h>
#include <wlr/types/wlr_primary_selection.h>
#include <wlr/types/wlr_primary_selection_v1.h>
@@ -250,6 +251,14 @@ 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 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);
+static void pinch_begin(struct wl_listener *listener, void *data);
+static void pinch_update(struct wl_listener *listener, void *data);
+static void pinch_end(struct wl_listener *listener, void *data);
+static void hold_begin(struct wl_listener *listener, void *data);
+static void hold_end(struct wl_listener *listener, void *data);
static void chvt(const Arg *arg);
static void checkidleinhibitor(struct wlr_surface *exclude);
static void cleanup(void);
@@ -383,6 +392,7 @@ static struct wlr_virtual_keyboard_manager_v1 *virtual_keyboard_mgr;
static struct wlr_virtual_pointer_manager_v1 *virtual_pointer_mgr;
static struct wlr_cursor_shape_manager_v1 *cursor_shape_mgr;
static struct wlr_output_power_manager_v1 *power_mgr;
+static struct wlr_pointer_gestures_v1 *pointer_gestures;
static struct wlr_pointer_constraints_v1 *pointer_constraints;
static struct wlr_relative_pointer_manager_v1 *relative_pointer_mgr;
@@ -644,6 +654,122 @@ buttonpress(struct wl_listener *listener, void *data)
event->time_msec, event->button, event->state);
}
+void
+swipe_begin(struct wl_listener *listener, void *data)
+{
+ struct wlr_pointer_swipe_begin_event *event = data;
+
+ // Forward swipe begin event to client
+ wlr_pointer_gestures_v1_send_swipe_begin(
+ pointer_gestures,
+ seat,
+ event->time_msec,
+ event->fingers
+ );
+}
+
+void
+swipe_update(struct wl_listener *listener, void *data)
+{
+ struct wlr_pointer_swipe_update_event *event = data;
+
+ // Forward swipe update event to client
+ wlr_pointer_gestures_v1_send_swipe_update(
+ pointer_gestures,
+ seat,
+ event->time_msec,
+ event->dx,
+ event->dy
+ );
+}
+
+void
+swipe_end(struct wl_listener *listener, void *data)
+{
+ struct wlr_pointer_swipe_end_event *event = data;
+
+ // Forward swipe end event to client
+ wlr_pointer_gestures_v1_send_swipe_end(
+ pointer_gestures,
+ seat,
+ event->time_msec,
+ event->cancelled
+ );
+}
+
+void
+pinch_begin(struct wl_listener *listener, void *data)
+{
+ struct wlr_pointer_pinch_begin_event *event = data;
+
+ // Forward pinch begin event to client
+ wlr_pointer_gestures_v1_send_pinch_begin(
+ pointer_gestures,
+ seat,
+ event->time_msec,
+ event->fingers
+ );
+}
+
+void
+pinch_update(struct wl_listener *listener, void *data)
+{
+ struct wlr_pointer_pinch_update_event *event = data;
+
+ // Forward pinch update event to client
+ wlr_pointer_gestures_v1_send_pinch_update(
+ pointer_gestures,
+ seat,
+ event->time_msec,
+ event->dx,
+ event->dy,
+ event->scale,
+ event->rotation
+ );
+}
+
+void
+pinch_end(struct wl_listener *listener, void *data)
+{
+ struct wlr_pointer_pinch_end_event *event = data;
+
+ // Forward pinch end event to client
+ wlr_pointer_gestures_v1_send_pinch_end(
+ pointer_gestures,
+ seat,
+ event->time_msec,
+ event->cancelled
+ );
+}
+
+void
+hold_begin(struct wl_listener *listener, void *data)
+{
+ struct wlr_pointer_hold_begin_event *event = data;
+
+ // Forward hold begin event to client
+ wlr_pointer_gestures_v1_send_hold_begin(
+ pointer_gestures,
+ seat,
+ event->time_msec,
+ event->fingers
+ );
+}
+
+void
+hold_end(struct wl_listener *listener, void *data)
+{
+ struct wlr_pointer_hold_end_event *event = data;
+
+ // Forward hold end event to client
+ wlr_pointer_gestures_v1_send_hold_end(
+ pointer_gestures,
+ seat,
+ event->time_msec,
+ event->cancelled
+ );
+}
+
void
chvt(const Arg *arg)
{
@@ -2556,6 +2682,16 @@ setup(void)
virtual_pointer_mgr = wlr_virtual_pointer_manager_v1_create(dpy);
LISTEN_STATIC(&virtual_pointer_mgr->events.new_virtual_pointer, virtualpointer);
+ pointer_gestures = wlr_pointer_gestures_v1_create(dpy);
+ LISTEN_STATIC(&cursor->events.swipe_begin, swipe_begin);
+ LISTEN_STATIC(&cursor->events.swipe_update, swipe_update);
+ LISTEN_STATIC(&cursor->events.swipe_end, swipe_end);
+ LISTEN_STATIC(&cursor->events.pinch_begin, pinch_begin);
+ LISTEN_STATIC(&cursor->events.pinch_update, pinch_update);
+ LISTEN_STATIC(&cursor->events.pinch_end, pinch_end);
+ LISTEN_STATIC(&cursor->events.hold_begin, hold_begin);
+ LISTEN_STATIC(&cursor->events.hold_end, hold_end);
+
seat = wlr_seat_create(dpy, "seat0");
LISTEN_STATIC(&seat->events.request_set_cursor, setcursor);
LISTEN_STATIC(&seat->events.request_set_selection, setsel);
--
2.45.1

9
patches/shiftview/README.md Normal file
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@ -0,0 +1,9 @@
### Description
Add keybindings to cycle through tags with visible clients.
### Download
- [git branch](https://codeberg.org/guidocella/dwl/src/branch/shiftview)
- [2024-01-27](https://codeberg.org/dwl/dwl-patches/raw/branch/main/patches/shiftview/shiftview.patch)
### Authors
- [Guido Cella](https://codeberg.org/guidocella)

76
patches/shiftview/shiftview.patch Normal file
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@ -0,0 +1,76 @@
From 40f9140742277d0298988990264f4b6a738f8122 Mon Sep 17 00:00:00 2001
From: Guido Cella <guido@guidocella.xyz>
Date: Sat, 27 Jan 2024 22:43:29 +0100
Subject: [PATCH] cycle through tags
---
config.def.h | 4 ++++
shiftview.c | 34 ++++++++++++++++++++++++++++++++++
2 files changed, 38 insertions(+)
create mode 100644 shiftview.c
diff --git a/config.def.h b/config.def.h
index 9009517..8d77ec0 100644
--- a/config.def.h
+++ b/config.def.h
@@ -117,6 +117,8 @@ static const enum libinput_config_tap_button_map button_map = LIBINPUT_CONFIG_TA
static const char *termcmd[] = { "foot", NULL };
static const char *menucmd[] = { "bemenu-run", NULL };
+#include "shiftview.c"
+
static const Key keys[] = {
/* Note that Shift changes certain key codes: c -> C, 2 -> at, etc. */
/* modifier key function argument */
@@ -130,6 +132,8 @@ static const Key keys[] = {
{ MODKEY, XKB_KEY_l, setmfact, {.f = +0.05f} },
{ MODKEY, XKB_KEY_Return, zoom, {0} },
{ MODKEY, XKB_KEY_Tab, view, {0} },
+ { MODKEY, XKB_KEY_a, shiftview, { .i = -1 } },
+ { MODKEY, XKB_KEY_semicolon, shiftview, { .i = 1 } },
{ MODKEY|WLR_MODIFIER_SHIFT, XKB_KEY_C, killclient, {0} },
{ MODKEY, XKB_KEY_t, setlayout, {.v = &layouts[0]} },
{ MODKEY, XKB_KEY_f, setlayout, {.v = &layouts[1]} },
diff --git a/shiftview.c b/shiftview.c
new file mode 100644
index 0000000..fa53db0
--- /dev/null
+++ b/shiftview.c
@@ -0,0 +1,34 @@
+// "arg->i" stores the number of tags to shift right (positive value)
+// or left (negative value)
+void
+shiftview(const Arg *arg)
+{
+ Arg a;
+ Client *c;
+ bool visible = false;
+ int i = arg->i;
+ int count = 0;
+ int nextseltags, curseltags = selmon->tagset[selmon->seltags];
+
+ do {
+ if (i > 0) // left circular shift
+ nextseltags = (curseltags << i) | (curseltags >> (TAGCOUNT - i));
+ else // right circular shift
+ nextseltags = curseltags >> (-i) | (curseltags << (TAGCOUNT + i));
+
+ // Check if the tag is visible
+ wl_list_for_each(c, &clients, link) {
+ if (c->mon == selmon && nextseltags & c->tags) {
+ visible = true;
+ break;
+ }
+ }
+
+ i += arg->i;
+ } while (!visible && ++count <= TAGCOUNT);
+
+ if (count <= TAGCOUNT) {
+ a.i = nextseltags;
+ view(&a);
+ }
+}
--
2.43.0

34
shiftview.c Normal file
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@ -0,0 +1,34 @@
// "arg->i" stores the number of tags to shift right (positive value)
// or left (negative value)
void
shiftview(const Arg *arg)
{
Arg a;
Client *c;
bool visible = false;
int i = arg->i;
int count = 0;
int nextseltags, curseltags = selmon->tagset[selmon->seltags];
do {
if (i > 0) // left circular shift
nextseltags = (curseltags << i) | (curseltags >> (TAGCOUNT - i));
else // right circular shift
nextseltags = curseltags >> (-i) | (curseltags << (TAGCOUNT + i));
// Check if the tag is visible
wl_list_for_each(c, &clients, link) {
if (c->mon == selmon && nextseltags & c->tags) {
visible = true;
break;
}
}
i += arg->i;
} while (!visible && ++count <= TAGCOUNT);
if (count <= TAGCOUNT) {
a.i = nextseltags;
view(&a);
}
}