From c66c6dff847d57978383701cda4b57d21baa82c0 Mon Sep 17 00:00:00 2001
From: Julien Danjou <julien@danjou.info>
Date: Thu, 27 Dec 2007 16:19:05 +0100
Subject: [PATCH] add support for _NET_CLIENT_LIST

---
 awesome.c |  3 ++-
 client.c  | 27 +++++++++++++++++++++++++++
 2 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/awesome.c b/awesome.c
index d4df36364..3e4d57910 100644
--- a/awesome.c
+++ b/awesome.c
@@ -289,7 +289,7 @@ main(int argc, char *argv[])
     Display * dpy;
     int shape_event, randr_event_base;
     int screen;
-    enum { NetSupported, NetWMName, NetWMIcon, NetLast };   /* EWMH atoms */
+    enum { NetSupported, NetWMName, NetWMIcon, NetClientList, NetLast };   /* EWMH atoms */
     Atom netatom[NetLast];
     event_handler **handler;
     struct sockaddr_un *addr;
@@ -348,6 +348,7 @@ main(int argc, char *argv[])
     netatom[NetSupported] = XInternAtom(dpy, "_NET_SUPPORTED", False);
     netatom[NetWMName] = XInternAtom(dpy, "_NET_WM_NAME", False);
     netatom[NetWMIcon] = XInternAtom(dpy, "_NET_WM_ICON", False);
+    netatom[NetClientList] = XInternAtom(dpy, "_NET_CLIENT_LIST", False);
 
     /* do this only for real screen */
     for(screen = 0; screen < ScreenCount(dpy); screen++)
diff --git a/client.c b/client.c
index f7f27dec1..057898603 100644
--- a/client.c
+++ b/client.c
@@ -257,6 +257,31 @@ focus(Client *c, Bool selscreen, int screen)
                        RevertToPointerRoot, CurrentTime);
 }
 
+static void
+ewmh_update_net_client_list(int phys_screen)
+{
+     Window *wins;
+     Client *c;
+     int n = 0;
+
+     for(c = globalconf.clients; c; c = c->next)
+         if(c->phys_screen == phys_screen)
+             n++;
+
+     wins = p_new(Window, n + 1);
+
+     for(n = 0, c = globalconf.clients; c; c = c->next, n++)
+         if(c->phys_screen == phys_screen)
+             wins[n] = c->win;
+
+     XChangeProperty(globalconf.display, RootWindow(globalconf.display, phys_screen),
+                     XInternAtom(globalconf.display, "_NET_CLIENT_LIST", False), XA_WINDOW, 32,
+                     PropModeReplace, (unsigned char*)wins, n);
+
+     p_delete(&wins);
+     XFlush(globalconf.display);     
+}
+
 /** Manage a new client
  * \param w The window
  * \param wa Window attributes
@@ -366,6 +391,8 @@ client_manage(Window w, XWindowAttributes *wa, int screen)
 
     focus(c, True, screen);
 
+    ewmh_update_net_client_list(c->phys_screen);
+
     /* rearrange to display new window */
     arrange(screen);
 }