From 4e0318919dd726f485ea3a495ff0989f69f35630 Mon Sep 17 00:00:00 2001
From: Nicholas Noll <nbnoll@eml.cc>
Date: Sat, 6 Jun 2020 19:56:41 -0700
Subject: hand added swallow patch

---
 sys/cmd/dwm/dwm.c | 75 +++++++++++++++++++++++++++++++++++++++++++++++++++++--
 1 file changed, 73 insertions(+), 2 deletions(-)

(limited to 'sys/cmd/dwm/dwm.c')

diff --git a/sys/cmd/dwm/dwm.c b/sys/cmd/dwm/dwm.c
index 22ccc91..8e8d44c 100644
--- a/sys/cmd/dwm/dwm.c
+++ b/sys/cmd/dwm/dwm.c
@@ -3,6 +3,7 @@
 /* global variables */
 char broken[] = "<broken>";
 char stext[256];
+int scanner;
 int screen;
 int sw, sh;           /* X display screen geometry width, height */
 int bh, blw = 0;      /* bar geometry */
@@ -26,6 +27,8 @@ void (*handler[LASTEvent]) (XEvent *) = {
 	[UnmapNotify]      = unmapnotify
 };
 
+xcb_connection_t *xcon;
+
 Atom wmatom[WMLast] = {0}, netatom[NetLast] = {0};
 int running = 1;
 Cur *cursor[MouseLast] = {0};
@@ -282,6 +285,8 @@ destroynotify(XEvent *e)
 
 	if ((c = wintoclient(ev->window)))
 		unmanage(c, 1);
+    else if ((c = swallowing(ev->window)))
+        unmanage(c->swallowing, 1);
 }
 
 Monitor *
@@ -498,12 +503,13 @@ keypress(XEvent *e)
 void
 manage(Window w, XWindowAttributes *wa)
 {
-	Client *c, *t = nil;
+	Client *c, *t = nil, *term = nil;
 	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;
@@ -518,6 +524,7 @@ manage(Window w, XWindowAttributes *wa)
 	} else {
 		c->mon = selmon;
 		applyrules(c);
+        term = termof(c);
 	}
 
 	if (c->x + WIDTH(c) > c->mon->mx + c->mon->mw)
@@ -539,12 +546,15 @@ manage(Window w, XWindowAttributes *wa)
 	updatewmhints(c);
 	XSelectInput(dpy, w, EnterWindowMask|FocusChangeMask|PropertyChangeMask|StructureNotifyMask);
 	grabbuttons(c, 0);
+
 	if (!c->isfloating)
 		c->isfloating = c->oldstate = trans != None || c->isfixed;
 	if (c->isfloating)
 		XRaiseWindow(dpy, c->win);
+
 	attach(c);
 	attachstack(c);
+
 	XChangeProperty(dpy, root, netatom[NetClientList], XA_WINDOW, 32, PropModeAppend,
 		(unsigned char *) &(c->win), 1);
 	XMoveResizeWindow(dpy, c->win, c->x + 2 * sw, c->y, c->w, c->h); /* some windows require this */
@@ -554,6 +564,8 @@ manage(Window w, XWindowAttributes *wa)
 	c->mon->sel = c;
 	arrange(c->mon);
 	XMapWindow(dpy, c->win);
+    if (term)
+        swallow(term, c);
 	focus(nil);
 }
 
@@ -706,6 +718,9 @@ scan(void)
 	uint i, num;
 	Window d1, d2, *wins = nil;
 	XWindowAttributes wa;
+    char swin[256];
+
+    scanner = 1;
 
 	if (XQueryTree(dpy, root, &d1, &d2, &wins, &num)) {
 		for (i = 0; i < num; i++) {
@@ -714,6 +729,8 @@ scan(void)
 				continue;
 			if (wa.map_state == IsViewable || getstate(wins[i]) == IconicState)
 				manage(wins[i], &wa);
+            else if (gettextprop(wins[i], netatom[NetClientList], swin, sizeof swin))
+                manage(wins[i], &wa);
 		}
 		for (i = 0; i < num; i++) { /* now the transients */
 			if (!XGetWindowAttributes(dpy, wins[i], &wa))
@@ -725,6 +742,8 @@ scan(void)
 		if (wins)
 			XFree(wins);
 	}
+
+    scanner = 0;
 }
 
 void
@@ -806,6 +825,22 @@ sigchld(int unused)
 	while (0 < waitpid(-1, nil, WNOHANG));
 }
 
+Client *
+swallowing(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 nil;
+}
+
 void
 tile(Monitor *m)
 {
@@ -830,7 +865,7 @@ tile(Monitor *m)
 			h = (m->wh - ty) / (n - i) - m->gapx;
 			resize(c, m->wx + mw + m->gapx, m->wy + ty, m->ww - mw - (2*c->bw) - (2*m->gapx), h - (2*c->bw), 0);
 			if (ty + HEIGHT(c) < m->wh)
-				ty += HEIGHT(c) + m->gapx;
+				ty += HEIGHT(c);
 		}
 }
 
@@ -997,6 +1032,40 @@ updatestatus(void)
 	drawbar(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;
+}
+
 Client *
 wintoclient(Window w)
 {
@@ -1074,6 +1143,8 @@ main(int argc, char *argv[])
 		fputs("warning: no locale support\n", stderr);
 	if (!(dpy = XOpenDisplay(nil)))
 		fatal("dwm: cannot open display");
+    if (!(xcon = XGetXCBConnection(dpy)))
+        fatal("dwm: cannot get xcb connection");
 
 	checkotherwm();
 	setup();
-- 
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