readded wm_atom's again, necessary to not kill complete apps when sending kill to a popup

cmd/wm/client.c

@@ -100,6 +100,7 @@ create_client(Window w, XWindowAttributes *wa)
 	c->rect.width = wa->width;
 	c->rect.height = wa->height;
 	XSetWindowBorderWidth(blz.dpy, c->win, 0);
+	c->proto = win_proto(c->win);
 	XGetTransientForHint(blz.dpy, c->win, &c->trans);
 	if(!XGetWMNormalHints(blz.dpy, c->win, &c->size, &msize) || !c->size.flags)
 		c->size.flags = PSize;
@@ -240,9 +241,27 @@ configure_client(Client *c)
 	XSync(blz.dpy, False);
 }
 
+static void
+send_client_message(Window w, Atom a, long value)
+{
+	XEvent e;
+	e.type = ClientMessage;
+	e.xclient.window = w;
+	e.xclient.message_type = a;
+	e.xclient.format = 32;
+	e.xclient.data.l[0] = value;
+	e.xclient.data.l[1] = CurrentTime;
+
+	XSendEvent(blz.dpy, w, False, NoEventMask, &e);
+	XSync(blz.dpy, False);
+}
+
 void
 kill_client(Client * c)
 {
+	if(c->proto & WM_PROTOCOL_DELWIN)
+		send_client_message(c->win, wm_atom[WMProtocols], wm_atom[WMDelete]);
+	else
 		XKillClient(blz.dpy, c->win);
 }
 
@@ -251,6 +270,10 @@ prop_client(Client *c, XPropertyEvent *e)
 {
 	long msize;
 
+	if(e->atom == wm_atom[WMProtocols]) {
+		c->proto = win_proto(c->win);
+		return;
+	}
 	switch (e->atom) {
 	case XA_WM_TRANSIENT_FOR:
 		XGetTransientForHint(blz.dpy, c->win, &c->trans);

cmd/wm/wm.c

@@ -63,9 +63,53 @@ scan_wins()
 		XFree(wins);
 }
 
+static int
+win_property(Window w, Atom a, Atom t, long l, unsigned char **prop)
+{
+	Atom real;
+	int format;
+	unsigned long res, extra;
+	int status;
+
+	status = XGetWindowProperty(blz.dpy, w, a, 0L, l, False, t, &real, &format,
+			&res, &extra, prop);
+
+	if(status != Success || *prop == 0) {
+		return 0;
+	}
+	if(res == 0) {
+		free((void *) *prop);
+	}
+	return res;
+}
+
+int
+win_proto(Window w)
+{
+	Atom *protocols;
+	long res;
+	int protos = 0;
+	int i;
+
+	res = win_property(w, wm_atom[WMProtocols], XA_ATOM, 20L,
+			((unsigned char **) &protocols));
+	if(res <= 0) {
+		return protos;
+	}
+	for(i = 0; i < res; i++) {
+		if(protocols[i] == wm_atom[WMDelete])
+			protos |= WM_PROTOCOL_DELWIN;
+	}
+	free((char *) protocols);
+	return protos;
+}
+
+
 static void
 init_atoms()
 {
+	wm_atom[WMProtocols] = XInternAtom(blz.dpy, "WM_PROTOCOLS", False);
+	wm_atom[WMDelete] = XInternAtom(blz.dpy, "WM_DELETE_WINDOW", False);
 	net_atom[NetSupported] = XInternAtom(blz.dpy, "_NET_SUPPORTED", False);
 	net_atom[NetWMName] = XInternAtom(blz.dpy, "_NET_WM_NAME", False);
 	tags_atom = XInternAtom(blz.dpy, "_WIN_TAGS", False);

cmd/wm/wm.h

@@ -11,6 +11,13 @@
 #include <ixp.h>
 #include <blitz.h>
 
+/* WM atoms */
+enum {
+	WMProtocols,
+	WMDelete,
+	WMLast
+};
+
 /* NET atoms */
 enum {
 	NetSupported,
@@ -94,6 +101,7 @@ struct Client {
 	char props[512];
 	unsigned short id;
 	unsigned int border;
+	int proto;
 	Bool floating;
 	Bool fixedsize;
 	Window win;
@@ -180,6 +188,7 @@ unsigned int num_screens;
 Blitz blz;
 GC xorgc;
 char *user;
+Atom wm_atom[WMLast];
 Atom net_atom[NetLast];
 Atom tags_atom;
 Cursor cursor[CurLast];
@@ -315,3 +324,4 @@ unsigned int newcolw_of_view(View *v);
 
 /* wm.c */
 int wmii_error_handler(Display *dpy, XErrorEvent *error);
+int win_proto(Window w);