From 3c60d854db25c4cf0c72a981b108bde0bbf933fd Mon Sep 17 00:00:00 2001
From: oga <oga>
Date: Mon, 7 Dec 2009 22:21:59 +0000
Subject: [PATCH] Implement _NET_ACTIVE_WINDOW. for now just the informational
 hint is supported, the client message to change this will be supported when
 all informational hints are working.

ok okan@
---
 calmwm.h |  3 ++-
 client.c | 21 +++++++++++++++++++--
 xutil.c  |  1 +
 3 files changed, 22 insertions(+), 3 deletions(-)

diff --git a/calmwm.h b/calmwm.h
index ca4eefb..75f56ea 100644
--- a/calmwm.h
+++ b/calmwm.h
@@ -526,7 +526,8 @@ extern struct conf			 Conf;
 #define	_NET_SUPPORTED			 cwm_atoms[7]
 #define	_NET_SUPPORTING_WM_CHECK	 cwm_atoms[8]
 #define	_NET_WM_NAME			 cwm_atoms[9]
-#define CWM_NO_ATOMS			 10
+#define	_NET_ACTIVE_WINDOW		 cwm_atoms[10]
+#define CWM_NO_ATOMS			 11
 #define CWM_NETWM_START			 7
 
 extern Atom				 cwm_atoms[CWM_NO_ATOMS];
diff --git a/client.c b/client.c
index b0eb875..fed35de 100644
--- a/client.c
+++ b/client.c
@@ -23,6 +23,7 @@
 
 static struct client_ctx	*client_mrunext(struct client_ctx *);
 static struct client_ctx	*client_mruprev(struct client_ctx *);
+static void			 client_none(struct screen_ctx *);
 static void			 client_placecalc(struct client_ctx *);
 static void			 client_update(struct client_ctx *);
 static void			 client_gethints(struct client_ctx *);
@@ -142,7 +143,7 @@ client_delete(struct client_ctx *cc)
 	TAILQ_REMOVE(&Clientq, cc, entry);
 
 	if (_curcc == cc)
-		_curcc = NULL;
+		client_none(sc);
 
 	XFree(cc->size);
 
@@ -202,12 +203,28 @@ client_setactive(struct client_ctx *cc, int fg)
 	if (fg && _curcc != cc) {
 		client_setactive(NULL, 0);
 		_curcc = cc;
+		XChangeProperty(X_Dpy, sc->rootwin, _NET_ACTIVE_WINDOW,
+		    XA_WINDOW, 32, PropModeReplace,
+		    (unsigned char *)&cc->win, 1);
 	}
 
 	cc->active = fg;
 	client_draw_border(cc);
 }
 
+/*
+ * set when there is no active client
+ */
+static void
+client_none(struct screen_ctx *sc)
+{
+	Window none = None;
+
+	XChangeProperty(X_Dpy, sc->rootwin, _NET_ACTIVE_WINDOW,
+	    XA_WINDOW, 32, PropModeReplace, (unsigned char *)&none, 1);
+	_curcc = NULL;
+}
+
 struct client_ctx *
 client_current(void)
 {
@@ -399,7 +416,7 @@ client_hide(struct client_ctx *cc)
 	xu_setstate(cc, IconicState);
 
 	if (cc == _curcc)
-		_curcc = NULL;
+		client_none(cc->sc);
 }
 
 void
diff --git a/xutil.c b/xutil.c
index 06b7d0d..d4e4f62 100644
--- a/xutil.c
+++ b/xutil.c
@@ -181,6 +181,7 @@ char 		*atoms[CWM_NO_ATOMS] = {
 	"_NET_SUPPORTED",
 	"_NET_SUPPORTING_WM_CHECK",
 	"_NET_WM_NAME",
+	"_NET_ACTIVE_WINDOW",
 };
 
 void