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authorMalfurious <m@lfurio.us>2020-06-22 00:39:34 -0400
committerMalfurious <m@lfurio.us>2024-03-05 21:04:53 -0500
commitd5d8ac227b361f0270b01f83b107ba78c209f3cc (patch)
tree68e1357ff0e5f23cfb3b14bd94058802d9f739d9 /dwm.c
parentba932e2b247692d443e3b274e64c57bad9bce9a1 (diff)
downloaddwm-d5d8ac227b361f0270b01f83b107ba78c209f3cc.tar.gz
dwm-d5d8ac227b361f0270b01f83b107ba78c209f3cc.zip
patch: swallowHEADmaster
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. This patch helps users spawning a lot of graphical programs from their command line by avoiding cluttering the screen with many unusable terminals. Being deep down in a directory hierarchy just does not make the use of dmenu feasible. Dependencies * libxcb * Xlib-libxcb * xcb-res These dependencies are needed due to the use of the latest revision of the X Resource Extension which is unsupported in vanilla Xlib. Notes: * The window swallowing functionality requires dwm to walk the process tree, which is an inherently OS-specific task. Only Linux and FreeBSD are supported at this time. Please contact one of the authors if you would like to help expand the list of supported operating systems. * Only terminals created by local processes can swallow windows, and only windows created by local processes can be swallowed.
Diffstat (limited to 'dwm.c')
-rw-r--r--dwm.c191
1 files changed, 185 insertions, 6 deletions
diff --git a/dwm.c b/dwm.c
index e48cb88..e0277d3 100644
--- a/dwm.c
+++ b/dwm.c
@@ -40,6 +40,8 @@
#include <X11/extensions/Xinerama.h>
#endif /* XINERAMA */
#include <X11/Xft/Xft.h>
+#include <X11/Xlib-xcb.h>
+#include <xcb/res.h>
#include "drw.h"
#include "util.h"
@@ -96,9 +98,11 @@ struct Client {
int basew, baseh, incw, inch, maxw, maxh, minw, minh, hintsvalid;
int bw, oldbw;
unsigned int tags;
- int isfixed, isfloating, isurgent, neverfocus, oldstate, isfullscreen;
+ int isfixed, isfloating, isurgent, neverfocus, oldstate, isfullscreen, isterminal, noswallow;
+ pid_t pid;
Client *next;
Client *snext;
+ Client *swallowing;
Monitor *mon;
Window win;
};
@@ -146,6 +150,8 @@ typedef struct {
const char *title;
unsigned int tags;
int isfloating;
+ int isterminal;
+ int noswallow;
int monitor;
const char *scratchpad_exec;
} Rule;
@@ -257,6 +263,13 @@ static void zoom(const Arg *arg);
static void centeredmaster(Monitor *m);
static void grid(Monitor *m);
+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);
+
+
/* variables */
static const char broken[] = "broken";
static char stext[256];
@@ -297,6 +310,7 @@ static int useargb = 0;
static Visual *visual;
static int depth;
static Colormap cmap;
+static xcb_connection_t *xcon;
/* configuration, allows nested code to access above variables */
#include "config.h"
@@ -383,7 +397,8 @@ applyrules(Client *c)
&& (!r->class || strstr(class, r->class))
&& (!r->instance || strstr(instance, r->instance)))
{
- c->isfloating = r->isfloating;
+ c->isterminal |= r->isterminal;
+ c->isfloating |= r->isfloating;
c->tags |= r->tags;
if ((r->tags & SPTAGMASK) && r->isfloating) {
c->x = c->mon->wx + (c->mon->ww / 2 - WIDTH(c) / 2);
@@ -506,6 +521,47 @@ attachstack(Client *c)
}
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);
+}
+
+void
buttonpress(XEvent *e)
{
unsigned int i, x, click;
@@ -764,6 +820,9 @@ destroynotify(XEvent *e)
if ((c = wintoclient(ev->window)))
unmanage(c, 1);
+
+ else if ((c = swallowingclient(ev->window)))
+ unmanage(c->swallowing, 1);
}
void
@@ -1179,12 +1238,13 @@ killclient(const Arg *arg)
void
manage(Window w, XWindowAttributes *wa)
{
- Client *c, *t = NULL;
+ Client *c, *t = NULL, *term = NULL;
Window trans = None;
XWindowChanges wc;
c = ecalloc(1, sizeof(Client));
c->win = w;
+ c->pid = winpid(w);
/* geometry */
c->x = c->oldx = wa->x;
c->y = c->oldy = wa->y;
@@ -1199,6 +1259,7 @@ manage(Window w, XWindowAttributes *wa)
} else {
c->mon = selmon;
applyrules(c);
+ term = termforwin(c);
}
if (c->x + WIDTH(c) > c->mon->wx + c->mon->ww)
@@ -1233,6 +1294,8 @@ manage(Window w, XWindowAttributes *wa)
c->mon->sel = c;
arrange(c->mon);
XMapWindow(dpy, c->win);
+ if (term)
+ swallow(term, c);
focus(NULL);
}
@@ -2076,6 +2139,20 @@ unmanage(Client *c, int destroyed)
Monitor *m = c->mon;
XWindowChanges wc;
+ if (c->swallowing) {
+ unswallow(c);
+ return;
+ }
+
+ Client *s = swallowingclient(c->win);
+ if (s) {
+ free(s->swallowing);
+ s->swallowing = NULL;
+ arrange(m);
+ focus(NULL);
+ return;
+ }
+
detach(c);
detachstack(c);
if (!destroyed) {
@@ -2091,9 +2168,12 @@ unmanage(Client *c, int destroyed)
XUngrabServer(dpy);
}
free(c);
- focus(NULL);
- updateclientlist();
- arrange(m);
+
+ if (!s) {
+ arrange(m);
+ focus(NULL);
+ updateclientlist();
+ }
if (nexttiled(m->clients) == NULL)
resetlayout(NULL);
@@ -2383,6 +2463,103 @@ view(const Arg *arg)
arrange(selmon);
}
+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;
+
+ fscanf(f, "%*u %*s %*c %u", &v);
+ 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;
+
+ 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;
+}
+
Client *
wintoclient(Window w)
{
@@ -2509,6 +2686,8 @@ main(int argc, char *argv[])
fputs("warning: no locale support\n", stderr);
if (!(dpy = XOpenDisplay(NULL)))
die("dwm: cannot open display");
+ if (!(xcon = XGetXCBConnection(dpy)))
+ die("dwm: cannot get xcb connection\n");
checkotherwm();
setup();
#ifdef __OpenBSD__