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Adding swallow patch

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pull/32/head
bakkeby 5 years ago
parent 71e61d180e
commit 3726d8d1ea
9 changed files with 313 additions and 17 deletions
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7
README.md
Unescape Escape View File

@ -15,7 +15,7 @@ Refer to [https://dwm.suckless.org/](https://dwm.suckless.org/) for details on t
### Changelog:
2019-10-22 - Added ispermanent patch
2019-10-22 - Added ispermanent and swallow patches
2019-10-16 - Introduced [flexipatch-finalizer](https://github.com/bakkeby/flexipatch-finalizer)
@ -244,6 +244,11 @@ Refer to [https://dwm.suckless.org/](https://dwm.suckless.org/) for details on t
- [sticky](https://dwm.suckless.org/patches/sticky/)
- adds toggleable keyboard shortcut to make a client 'sticky', i.e. visible on all tags
- [swallow](https://dwm.suckless.org/patches/swallow/)
- this patch adds "window swallowing" to dwm as known from Plan 9's windowing system rio
- clients marked with isterminal in config.h swallow a window opened by any child process, e.g. running xclock in a terminal
- closing the xclock window restores the terminal window in the current position
- [switchcol](https://dwm.suckless.org/patches/switchcol/)
- allows you to switch focus between the master and stack columns using a single keybinding

94
config.def.h
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@ -186,66 +186,130 @@ static const Rule rules[] = {
* WM_NAME(STRING) = title
* WM_WINDOW_ROLE(STRING) = role
*/
#if WINDOWROLERULE_PATCH && SWITCHTAG_PATCH && CENTER_PATCH && ISPERMANENT_PATCH
#if WINDOWROLERULE_PATCH && SWITCHTAG_PATCH && CENTER_PATCH && ISPERMANENT_PATCH && SWALLOW_PATCH
/* class role instance title tags mask switchtag iscentered isfloating ispermanent isterminal noswallow monitor */
{ "Gimp", NULL, NULL, NULL, 0, 1, 0, 1, 0, 0, 0, -1 },
{ "Firefox", NULL, NULL, NULL, 1 << 8, 1, 0, 0, 0, 0, 0, -1 }
#elif WINDOWROLERULE_PATCH && SWITCHTAG_PATCH && CENTER_PATCH && ISPERMANENT_PATCH && !SWALLOW_PATCH
/* class role instance title tags mask switchtag iscentered isfloating ispermanent monitor */
{ "Gimp", NULL, NULL, NULL, 0, 1, 0, 1, 0, -1 },
{ "Firefox", NULL, NULL, NULL, 1 << 8, 1, 0, 0, 0, -1 },
#elif WINDOWROLERULE_PATCH && SWITCHTAG_PATCH && CENTER_PATCH && !ISPERMANENT_PATCH
#elif WINDOWROLERULE_PATCH && SWITCHTAG_PATCH && CENTER_PATCH && !ISPERMANENT_PATCH && SWALLOW_PATCH
/* class role instance title tags mask switchtag iscentered isfloating isterminal noswallow monitor */
{ "Gimp", NULL, NULL, NULL, 0, 1, 0, 1, 0, 0, -1 },
{ "Firefox", NULL, NULL, NULL, 1 << 8, 1, 0, 0, 0, 0, -1 },
#elif WINDOWROLERULE_PATCH && SWITCHTAG_PATCH && CENTER_PATCH && !ISPERMANENT_PATCH && !SWALLOW_PATCH
/* class role instance title tags mask switchtag iscentered isfloating monitor */
{ "Gimp", NULL, NULL, NULL, 0, 1, 0, 1, -1 },
{ "Firefox", NULL, NULL, NULL, 1 << 8, 1, 0, 0, -1 },
#elif WINDOWROLERULE_PATCH && !SWITCHTAG_PATCH && CENTER_PATCH && ISPERMANENT_PATCH
#elif WINDOWROLERULE_PATCH && !SWITCHTAG_PATCH && CENTER_PATCH && ISPERMANENT_PATCH && SWALLOW_PATCH
/* class role instance title tags mask iscentered isfloating ispermanent isterminal noswallow monitor */
{ "Gimp", NULL, NULL, NULL, 0, 0, 1, 0, 0, 0, -1 },
{ "Firefox", NULL, NULL, NULL, 1 << 8, 0, 0, 0, 0, 0, -1 },
#elif WINDOWROLERULE_PATCH && !SWITCHTAG_PATCH && CENTER_PATCH && ISPERMANENT_PATCH && !SWALLOW_PATCH
/* class role instance title tags mask iscentered isfloating ispermanent monitor */
{ "Gimp", NULL, NULL, NULL, 0, 0, 1, 0, -1 },
{ "Firefox", NULL, NULL, NULL, 1 << 8, 0, 0, 0, -1 },
#elif WINDOWROLERULE_PATCH && !SWITCHTAG_PATCH && CENTER_PATCH && !ISPERMANENT_PATCH
#elif WINDOWROLERULE_PATCH && !SWITCHTAG_PATCH && CENTER_PATCH && !ISPERMANENT_PATCH && SWALLOW_PATCH
/* class role instance title tags mask iscentered isfloating isterminal noswallow monitor */
{ "Gimp", NULL, NULL, NULL, 0, 0, 1, 0, 0, -1 },
{ "Firefox", NULL, NULL, NULL, 1 << 8, 0, 0, 0, 0, -1 },
#elif WINDOWROLERULE_PATCH && !SWITCHTAG_PATCH && CENTER_PATCH && !ISPERMANENT_PATCH && !SWALLOW_PATCH
/* class role instance title tags mask iscentered isfloating monitor */
{ "Gimp", NULL, NULL, NULL, 0, 0, 1, -1 },
{ "Firefox", NULL, NULL, NULL, 1 << 8, 0, 0, -1 },
#elif WINDOWROLERULE_PATCH && SWITCHTAG_PATCH && !CENTER_PATCH && ISPERMANENT_PATCH
#elif WINDOWROLERULE_PATCH && SWITCHTAG_PATCH && !CENTER_PATCH && ISPERMANENT_PATCH && SWALLOW_PATCH
/* class role instance title tags mask switchtag isfloating ispermanent isterminal noswallow monitor */
{ "Gimp", NULL, NULL, NULL, 0, 1, 1, 0, 0, 0, -1 },
{ "Firefox", NULL, NULL, NULL, 1 << 8, 1, 0, 0, 0, 0, -1 },
#elif WINDOWROLERULE_PATCH && SWITCHTAG_PATCH && !CENTER_PATCH && ISPERMANENT_PATCH && !SWALLOW_PATCH
/* class role instance title tags mask switchtag isfloating ispermanent monitor */
{ "Gimp", NULL, NULL, NULL, 0, 1, 1, 0, -1 },
{ "Firefox", NULL, NULL, NULL, 1 << 8, 1, 0, 0, -1 },
#elif WINDOWROLERULE_PATCH && SWITCHTAG_PATCH && !CENTER_PATCH && !ISPERMANENT_PATCH
#elif WINDOWROLERULE_PATCH && SWITCHTAG_PATCH && !CENTER_PATCH && !ISPERMANENT_PATCH && SWALLOW_PATCH
/* class role instance title tags mask switchtag isfloating isterminal noswallow monitor */
{ "Gimp", NULL, NULL, NULL, 0, 1, 1, 0, 0, -1 },
{ "Firefox", NULL, NULL, NULL, 1 << 8, 1, 0, 0, 0, -1 },
#elif WINDOWROLERULE_PATCH && SWITCHTAG_PATCH && !CENTER_PATCH && !ISPERMANENT_PATCH && !SWALLOW_PATCH
/* class role instance title tags mask switchtag isfloating monitor */
{ "Gimp", NULL, NULL, NULL, 0, 1, 1, -1 },
{ "Firefox", NULL, NULL, NULL, 1 << 8, 1, 0, -1 },
#elif !WINDOWROLERULE_PATCH && SWITCHTAG_PATCH && CENTER_PATCH && ISPERMANENT_PATCH
#elif !WINDOWROLERULE_PATCH && SWITCHTAG_PATCH && CENTER_PATCH && ISPERMANENT_PATCH && SWALLOW_PATCH
/* class instance title tags mask switchtag iscentered isfloating ispermanent isterminal noswallow monitor */
{ "Gimp", NULL, NULL, 0, 1, 0, 1, 0, 0, 0, -1 },
{ "Firefox", NULL, NULL, 1 << 8, 1, 0, 0, 0, 0, 0, -1 },
#elif !WINDOWROLERULE_PATCH && SWITCHTAG_PATCH && CENTER_PATCH && ISPERMANENT_PATCH && !SWALLOW_PATCH
/* class instance title tags mask switchtag iscentered isfloating ispermanent monitor */
{ "Gimp", NULL, NULL, 0, 1, 0, 1, 0, -1 },
{ "Firefox", NULL, NULL, 1 << 8, 1, 0, 0, 0, -1 },
#elif !WINDOWROLERULE_PATCH && SWITCHTAG_PATCH && CENTER_PATCH && !ISPERMANENT_PATCH
#elif !WINDOWROLERULE_PATCH && SWITCHTAG_PATCH && CENTER_PATCH && !ISPERMANENT_PATCH && SWALLOW_PATCH
/* class instance title tags mask switchtag iscentered isfloating isterminal noswallow monitor */
{ "Gimp", NULL, NULL, 0, 1, 0, 1, 0, 0, -1 },
{ "Firefox", NULL, NULL, 1 << 8, 1, 0, 0, 0, 0, -1 },
#elif !WINDOWROLERULE_PATCH && SWITCHTAG_PATCH && CENTER_PATCH && !ISPERMANENT_PATCH && !SWALLOW_PATCH
/* class instance title tags mask switchtag iscentered isfloating monitor */
{ "Gimp", NULL, NULL, 0, 1, 0, 1, -1 },
{ "Firefox", NULL, NULL, 1 << 8, 1, 0, 0, -1 },
#elif WINDOWROLERULE_PATCH && !SWITCHTAG_PATCH && !CENTER_PATCH && ISPERMANENT_PATCH
#elif WINDOWROLERULE_PATCH && !SWITCHTAG_PATCH && !CENTER_PATCH && ISPERMANENT_PATCH && SWALLOW_PATCH
/* class role instance title tags mask isfloating ispermanent isterminal noswallow monitor */
{ "Gimp", NULL, NULL, NULL, 0, 1, 0, 0, 0, -1 },
{ "Firefox", NULL, NULL, NULL, 1 << 8, 0, 0, 0, 0, -1 },
#elif WINDOWROLERULE_PATCH && !SWITCHTAG_PATCH && !CENTER_PATCH && ISPERMANENT_PATCH && !SWALLOW_PATCH
/* class role instance title tags mask isfloating ispermanent monitor */
{ "Gimp", NULL, NULL, NULL, 0, 1, 0, -1 },
{ "Firefox", NULL, NULL, NULL, 1 << 8, 0, 0, -1 },
#elif WINDOWROLERULE_PATCH && !SWITCHTAG_PATCH && !CENTER_PATCH && !ISPERMANENT_PATCH
#elif WINDOWROLERULE_PATCH && !SWITCHTAG_PATCH && !CENTER_PATCH && !ISPERMANENT_PATCH && SWALLOW_PATCH
/* class role instance title tags mask isfloating isterminal noswallow monitor */
{ "Gimp", NULL, NULL, NULL, 0, 1, 0, 0, -1 },
{ "Firefox", NULL, NULL, NULL, 1 << 8, 0, 0, 0, -1 },
#elif WINDOWROLERULE_PATCH && !SWITCHTAG_PATCH && !CENTER_PATCH && !ISPERMANENT_PATCH && !SWALLOW_PATCH
/* class role instance title tags mask isfloating monitor */
{ "Gimp", NULL, NULL, NULL, 0, 1, -1 },
{ "Firefox", NULL, NULL, NULL, 1 << 8, 0, -1 },
#elif !WINDOWROLERULE_PATCH && SWITCHTAG_PATCH && !CENTER_PATCH && ISPERMANENT_PATCH
#elif !WINDOWROLERULE_PATCH && SWITCHTAG_PATCH && !CENTER_PATCH && ISPERMANENT_PATCH && SWALLOW_PATCH
/* class instance title tags mask switchtag isfloating ispermanent isterminal noswallow monitor */
{ "Gimp", NULL, NULL, 0, 1, 1, 0, 0, 0, -1 },
{ "Firefox", NULL, NULL, 1 << 8, 1, 0, 0, 0, 0, -1 },
#elif !WINDOWROLERULE_PATCH && SWITCHTAG_PATCH && !CENTER_PATCH && ISPERMANENT_PATCH && !SWALLOW_PATCH
/* class instance title tags mask switchtag isfloating ispermanent monitor */
{ "Gimp", NULL, NULL, 0, 1, 1, 0, -1 },
{ "Firefox", NULL, NULL, 1 << 8, 1, 0, 0, -1 },
#elif !WINDOWROLERULE_PATCH && SWITCHTAG_PATCH && !CENTER_PATCH && !ISPERMANENT_PATCH
#elif !WINDOWROLERULE_PATCH && SWITCHTAG_PATCH && !CENTER_PATCH && !ISPERMANENT_PATCH && SWALLOW_PATCH
/* class instance title tags mask switchtag isfloating isterminal noswallow monitor */
{ "Gimp", NULL, NULL, 0, 1, 1, 0, 0, -1 },
{ "Firefox", NULL, NULL, 1 << 8, 1, 0, 0, 0, -1 },
#elif !WINDOWROLERULE_PATCH && SWITCHTAG_PATCH && !CENTER_PATCH && !ISPERMANENT_PATCH && !SWALLOW_PATCH
/* class instance title tags mask switchtag isfloating monitor */
{ "Gimp", NULL, NULL, 0, 1, 1, -1 },
{ "Firefox", NULL, NULL, 1 << 8, 1, 0, -1 },
#elif !WINDOWROLERULE_PATCH && !SWITCHTAG_PATCH && CENTER_PATCH && ISPERMANENT_PATCH
#elif !WINDOWROLERULE_PATCH && !SWITCHTAG_PATCH && CENTER_PATCH && ISPERMANENT_PATCH && SWALLOW_PATCH
/* class instance title tags mask iscentered isfloating ispermanent isterminal noswallow monitor */
{ "Gimp", NULL, NULL, 0, 0, 1, 0, 0, 0, -1 },
{ "Firefox", NULL, NULL, 1 << 8, 0, 0, 0, 0, 0, -1 },
#elif !WINDOWROLERULE_PATCH && !SWITCHTAG_PATCH && CENTER_PATCH && ISPERMANENT_PATCH && !SWALLOW_PATCH
/* class instance title tags mask iscentered isfloating ispermanent monitor */
{ "Gimp", NULL, NULL, 0, 0, 1, 0, -1 },
{ "Firefox", NULL, NULL, 1 << 8, 0, 0, 0, -1 },
#elif !WINDOWROLERULE_PATCH && !SWITCHTAG_PATCH && CENTER_PATCH && !ISPERMANENT_PATCH
#elif !WINDOWROLERULE_PATCH && !SWITCHTAG_PATCH && CENTER_PATCH && !ISPERMANENT_PATCH && SWALLOW_PATCH
/* class instance title tags mask iscentered isfloating isterminal noswallow monitor */
{ "Gimp", NULL, NULL, 0, 0, 1, 0, 0, -1 },
{ "Firefox", NULL, NULL, 1 << 8, 0, 0, 0, 0, -1 },
#elif !WINDOWROLERULE_PATCH && !SWITCHTAG_PATCH && CENTER_PATCH && !ISPERMANENT_PATCH && !SWALLOW_PATCH
/* class instance title tags mask iscentered isfloating monitor */
{ "Gimp", NULL, NULL, 0, 0, 1, -1 },
{ "Firefox", NULL, NULL, 1 << 8, 0, 0, -1 },
#elif !WINDOWROLERULE_PATCH && !SWITCHTAG_PATCH && !CENTER_PATCH && ISPERMANENT_PATCH
#elif !WINDOWROLERULE_PATCH && !SWITCHTAG_PATCH && !CENTER_PATCH && ISPERMANENT_PATCH && SWALLOW_PATCH
/* class instance title tags mask isfloating ispermanent isterminal noswallow monitor */
{ "Gimp", NULL, NULL, 0, 1, 0, 0, 0, -1 },
{ "Firefox", NULL, NULL, 1 << 8, 0, 0, 0, 0, -1 },
#elif !WINDOWROLERULE_PATCH && !SWITCHTAG_PATCH && !CENTER_PATCH && ISPERMANENT_PATCH && !SWALLOW_PATCH
/* class instance title tags mask isfloating ispermanent monitor */
{ "Gimp", NULL, NULL, 0, 1, 0, -1 },
{ "Firefox", NULL, NULL, 1 << 8, 0, 0, -1 },
#elif !WINDOWROLERULE_PATCH && !SWITCHTAG_PATCH && !CENTER_PATCH && !ISPERMANENT_PATCH && SWALLOW_PATCH
/* class instance title tags mask isfloating isterminal noswallow monitor */
{ "Gimp", NULL, NULL, 0, 1, 0, 0, -1 },
{ "Firefox", NULL, NULL, 1 << 8, 0, 0, 0, -1 },
#else
/* class instance title tags mask isfloating monitor */
{ "Gimp", NULL, NULL, 0, 1, -1 },

5
config.mk
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@ -23,9 +23,12 @@ FREETYPEINC = /usr/include/freetype2
# Uncomment this for the mdpcontrol patch / MDPCONTROL_PATCH
#LMPDCLIENT = -lmpdclient
# Uncomment this for the swallow patch / SWALLOW_PATCH
#LXCBLIBS = -lX11-xcb -lxcb -lxcb-res
# includes and libs
INCS = -I${X11INC} -I${FREETYPEINC}
LIBS = -L${X11LIB} -lX11 ${XINERAMALIBS} ${FREETYPELIBS} -lXrender ${LMPDCLIENT}
LIBS = -L${X11LIB} -lX11 ${XINERAMALIBS} ${FREETYPELIBS} -lXrender ${LMPDCLIENT} ${LXCBLIBS}
# flags

56
dwm.c
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@ -162,11 +162,18 @@ struct Client {
#if ISPERMANENT_PATCH
int ispermanent;
#endif // ISPERMANENT_PATCH
#if SWALLOW_PATCH
int isterminal, noswallow;
pid_t pid;
#endif // SWALLOW_PATCH
#if STICKY_PATCH
int issticky;
#endif // STICKY_PATCH
Client *next;
Client *snext;
#if SWALLOW_PATCH
Client *swallowing;
#endif // SWALLOW_PATCH
Monitor *mon;
Window win;
};
@ -263,6 +270,10 @@ typedef struct {
#if ISPERMANENT_PATCH
int ispermanent;
#endif // ISPERMANENT_PATCH
#if SWALLOW_PATCH
int isterminal;
int noswallow;
#endif // SWALLOW_PATCH
int monitor;
} Rule;
@ -477,6 +488,10 @@ applyrules(Client *c)
#if ISPERMANENT_PATCH
c->ispermanent = r->ispermanent;
#endif // ISPERMANENT_PATCH
#if SWALLOW_PATCH
c->isterminal = r->isterminal;
c->noswallow = r->noswallow;
#endif // SWALLOW_PATCH
c->isfloating = r->isfloating;
c->tags |= r->tags;
for (m = mons; m && m->num != r->monitor; m = m->next);
@ -1193,6 +1208,10 @@ destroynotify(XEvent *e)
if ((c = wintoclient(ev->window)))
unmanage(c, 1);
#if SWALLOW_PATCH
else if ((c = swallowingclient(ev->window)))
unmanage(c->swallowing, 1);
#endif // SWALLOW_PATCH
#if SYSTRAY_PATCH
else if (showsystray && (c = wintosystrayicon(ev->window))) {
removesystrayicon(c);
@ -1871,11 +1890,17 @@ void
manage(Window w, XWindowAttributes *wa)
{
Client *c, *t = NULL;
#if SWALLOW_PATCH
Client *term = NULL;
#endif // SWALLOW_PATCH
Window trans = None;
XWindowChanges wc;
c = ecalloc(1, sizeof(Client));
c->win = w;
#if SWALLOW_PATCH
c->pid = winpid(w);
#endif // SWALLOW_PATCH
/* geometry */
c->x = c->oldx = wa->x;
c->y = c->oldy = wa->y;
@ -1893,6 +1918,9 @@ manage(Window w, XWindowAttributes *wa)
} else {
c->mon = selmon;
applyrules(c);
#if SWALLOW_PATCH
term = termforwin(c);
#endif // SWALLOW_PATCH
}
if (c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
@ -1986,6 +2014,10 @@ manage(Window w, XWindowAttributes *wa)
#else
XMapWindow(dpy, c->win);
#endif // AWESOMEBAR_PATCH
#if SWALLOW_PATCH
if (term)
swallow(term, c);
#endif // SWALLOW_PATCH
focus(NULL);
}
@ -3105,6 +3137,22 @@ unmanage(Client *c, int destroyed)
Monitor *m = c->mon;
XWindowChanges wc;
#if SWALLOW_PATCH
if (c->swallowing) {
unswallow(c);
return;
}
Client *s = swallowingclient(c->win);
if (s) {
free(s->swallowing);
s->swallowing = NULL;
arrange(m);
focus(NULL);
return;
}
#endif // SWALLOW_PATCH
detach(c);
detachstack(c);
if (!destroyed) {
@ -3119,6 +3167,10 @@ unmanage(Client *c, int destroyed)
XUngrabServer(dpy);
}
free(c);
#if SWALLOW_PATCH
if (s)
return;
#endif // SWALLOW_PATCH
focus(NULL);
updateclientlist();
arrange(m);
@ -3627,6 +3679,10 @@ main(int argc, char *argv[])
fputs("warning: no locale support\n", stderr);
if (!(dpy = XOpenDisplay(NULL)))
die("dwm: cannot open display");
#if SWALLOW_PATCH
if (!(xcon = XGetXCBConnection(dpy)))
die("dwm: cannot get xcb connection\n");
#endif // SWALLOW_PATCH
checkotherwm();
#if XRDB_PATCH
XrmInitialize();

3
patch/include.c
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@ -90,6 +90,9 @@
#if SYSTRAY_PATCH
#include "systray.c"
#endif
#if SWALLOW_PATCH
#include "swallow.c"
#endif // SWALLOW_PATCH
#if SWITCHCOL_PATCH
#include "switchcol.c"
#endif

3
patch/include.h
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@ -90,6 +90,9 @@
#if SYSTRAY_PATCH
#include "systray.h"
#endif
#if SWALLOW_PATCH
#include "swallow.h"
#endif // SWALLOW_PATCH
#if SWITCHCOL_PATCH
#include "switchcol.h"
#endif

149
patch/swallow.c
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@ -0,0 +1,149 @@
#include <X11/Xlib-xcb.h>
#include <xcb/res.h>
static xcb_connection_t *xcon;
void
swallow(Client *p, Client *c)
{
if (c->noswallow || c->isterminal)
return;
detach(c);
detachstack(c);
setclientstate(c, WithdrawnState);
XUnmapWindow(dpy, p->win);
p->swallowing = c;
c->mon = p->mon;
Window w = p->win;
p->win = c->win;
c->win = w;
updatetitle(p);
arrange(p->mon);
XMoveResizeWindow(dpy, p->win, p->x, p->y, p->w, p->h);
configure(p);
updateclientlist();
}
void
unswallow(Client *c)
{
c->win = c->swallowing->win;
free(c->swallowing);
c->swallowing = NULL;
updatetitle(c);
arrange(c->mon);
XMapWindow(dpy, c->win);
XMoveResizeWindow(dpy, c->win, c->x, c->y, c->w, c->h);
configure(c);
setclientstate(c, NormalState);
}
pid_t
winpid(Window w)
{
pid_t result = 0;
xcb_res_client_id_spec_t spec = {0};
spec.client = w;
spec.mask = XCB_RES_CLIENT_ID_MASK_LOCAL_CLIENT_PID;
xcb_generic_error_t *e = NULL;
xcb_res_query_client_ids_cookie_t c = xcb_res_query_client_ids(xcon, 1, &spec);
xcb_res_query_client_ids_reply_t *r = xcb_res_query_client_ids_reply(xcon, c, &e);
if (!r)
return (pid_t)0;
xcb_res_client_id_value_iterator_t i = xcb_res_query_client_ids_ids_iterator(r);
for (; i.rem; xcb_res_client_id_value_next(&i)) {
spec = i.data->spec;
if (spec.mask & XCB_RES_CLIENT_ID_MASK_LOCAL_CLIENT_PID) {
uint32_t *t = xcb_res_client_id_value_value(i.data);
result = *t;
break;
}
}
free(r);
if (result == (pid_t)-1)
result = 0;
return result;
}
pid_t
getparentprocess(pid_t p)
{
unsigned int v = 0;
#ifdef __linux__
FILE *f;
char buf[256];
snprintf(buf, sizeof(buf) - 1, "/proc/%u/stat", (unsigned)p);
if (!(f = fopen(buf, "r")))
return 0;
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-result"
fscanf(f, "%*u %*s %*c %u", &v);
#pragma GCC diagnostic pop
fclose(f);
#endif /* __linux__ */
return (pid_t)v;
}
int
isdescprocess(pid_t p, pid_t c)
{
while (p != c && c != 0)
c = getparentprocess(c);
return (int)c;
}
Client *
termforwin(const Client *w)
{
Client *c;
Monitor *m;
if (!w->pid || w->isterminal)
return NULL;
c = selmon->sel;
if (c && c->isterminal && !c->swallowing && c->pid && isdescprocess(c->pid, w->pid))
return c;
for (m = mons; m; m = m->next) {
for (c = m->clients; c; c = c->next) {
if (c->isterminal && !c->swallowing && c->pid && isdescprocess(c->pid, w->pid))
return c;
}
}
return NULL;
}
Client *
swallowingclient(Window w)
{
Client *c;
Monitor *m;
for (m = mons; m; m = m->next) {
for (c = m->clients; c; c = c->next) {
if (c->swallowing && c->swallowing->win == w)
return c;
}
}
return NULL;
}

5
patch/swallow.h
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@ -0,0 +1,5 @@
static pid_t getparentprocess(pid_t p);
static int isdescprocess(pid_t p, pid_t c);
static Client *swallowingclient(Window w);
static Client *termforwin(const Client *c);
static pid_t winpid(Window w);

8
patches.h
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@ -377,6 +377,14 @@
*/
#define SYSTRAY_PATCH 0
/* This patch adds "window swallowing" to dwm as known from Plan 9's windowing system rio.
* Clients marked with isterminal in config.h swallow a window opened by any child process,
* e.g. running xclock in a terminal. Closing the xclock window restores the terminal window
* in the current position.
* https://dwm.suckless.org/patches/swallow/
*/
#define SWALLOW_PATCH 0
/* Switch focus between the master and stack columns using a single keybinding.
* https://dwm.suckless.org/patches/switchcol/
*/

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