We've been handling grabbing wrong all this time (noticed at c2k8).

add conf_grab() and conf_ungrab, and use them in the keybinding manipulation
functions to {,un}grab the binding for all screens we have defined.

the lovely little ordering problem comes in here, since when we parse
the config initially Screenq is empty, so regrab after we fill the
queue, hopefully later reordering will remove this little need and there
will be much rejoicing.

ok okan.

3 files changed, 48 insertions, 5 deletions

diff --git a/calmwm.c b/calmwm.c
index 419585d..2ef2c8b 100644
--- a/calmwm.c
+++ b/calmwm.c
@@ -127,6 +127,7 @@ void
 x_setup(void)
 {
 	struct screen_ctx	*sc;
+	struct keybinding	*kb;
 	int			 i;
 
 	Nscreens = ScreenCount(X_Dpy);
@@ -136,6 +137,14 @@ x_setup(void)
 		TAILQ_INSERT_TAIL(&Screenq, sc, entry);
 	}
 
+	/*
+	 * XXX key grabs weren't done before, since Screenq was empty,
+	 * do them here for now (this needs changing).
+	 */
+	TAILQ_FOREACH(kb, &Conf.keybindingq, entry)
+		conf_grab(&Conf, kb);
+
+
 	Cursor_move = XCreateFontCursor(X_Dpy, XC_fleur);
 	Cursor_resize = XCreateFontCursor(X_Dpy, XC_bottom_right_corner);
 	Cursor_select = XCreateFontCursor(X_Dpy, XC_hand1);
@@ -151,7 +160,6 @@ x_setupscreen(struct screen_ctx *sc, u_int which)
 	Window			*wins, w0, w1;
 	XWindowAttributes	 winattr;
 	XSetWindowAttributes	 rootattr;
-	struct keybinding	*kb;
 	u_int			 nwins, i;
 
 	Curscreen = sc;
@@ -178,9 +186,6 @@ x_setupscreen(struct screen_ctx *sc, u_int which)
 	XAllocNamedColor(X_Dpy, DefaultColormap(X_Dpy, which),
 	    "black", &sc->blackcolor, &tmp);
 
-	TAILQ_FOREACH(kb, &Conf.keybindingq, entry)
-		xu_key_grab(sc->rootwin, kb->modmask, kb->keysym);
-
 	sc->blackpixl = BlackPixel(X_Dpy, sc->which);
 	sc->whitepixl = WhitePixel(X_Dpy, sc->which);
 	sc->bluepixl = sc->fccolor.pixel;
diff --git a/calmwm.h b/calmwm.h
index 91cce4b..7433f56 100644
--- a/calmwm.h
+++ b/calmwm.h
@@ -419,6 +419,8 @@ void			 screen_updatestackingorder(void);
 
 void			 conf_setup(struct conf *, const char *);
 void			 conf_client(struct client_ctx *);
+void			 conf_grab(struct conf *, struct keybinding *);
+void			 conf_ungrab(struct conf *, struct keybinding *);
 void			 conf_bindname(struct conf *, char *, char *);
 void			 conf_unbind(struct conf *, struct keybinding *);
 void			 conf_mousebind(struct conf *, char *, char *);
diff --git a/conf.c b/conf.c
index b824c4f..be80de9 100644
--- a/conf.c
+++ b/conf.c
@@ -290,6 +290,38 @@ struct {
 	{ NULL, NULL, 0, 0},
 };
 
+/*
+ * The following two functions are used when grabbing and ungrabbing keys for
+ * bindings
+ */
+
+/*
+ * Grab key combination on all screens and add to the global queue
+ */
+void
+conf_grab(struct conf *c, struct keybinding *kb)
+{
+	extern struct screen_ctx_q	 Screenq;
+	struct screen_ctx		*sc;
+
+	TAILQ_FOREACH(sc, &Screenq, entry)
+		xu_key_grab(sc->rootwin, kb->modmask, kb->keysym);
+
+}
+
+/*
+ * Ungrab key combination from all screens and remove from global queue
+ */
+void
+conf_ungrab(struct conf *c, struct keybinding *kb)
+{
+	extern struct screen_ctx_q	 Screenq;
+	struct screen_ctx		*sc;
+
+	TAILQ_FOREACH(sc, &Screenq, entry)
+		xu_key_ungrab(sc->rootwin, kb->modmask, kb->keysym);
+}
+
 void
 conf_bindname(struct conf *c, char *name, char *binding)
 {
@@ -349,6 +381,7 @@ conf_bindname(struct conf *c, char *name, char *binding)
 		current_binding->callback = name_to_kbfunc[iter].handler;
 		current_binding->flags = name_to_kbfunc[iter].flags;
 		current_binding->argument = name_to_kbfunc[iter].argument;
+		conf_grab(c, current_binding);
 		TAILQ_INSERT_TAIL(&c->keybindingq, current_binding, entry);
 		return;
 	}
@@ -356,11 +389,13 @@ conf_bindname(struct conf *c, char *name, char *binding)
 	current_binding->callback = kbfunc_cmdexec;
 	current_binding->argument = xstrdup(binding);
 	current_binding->flags = 0;
+	conf_grab(c, current_binding);
 	TAILQ_INSERT_TAIL(&c->keybindingq, current_binding, entry);
 	return;
 }
 
-void conf_unbind(struct conf *c, struct keybinding *unbind)
+void
+conf_unbind(struct conf *c, struct keybinding *unbind)
 {
 	struct keybinding	*key = NULL, *keynxt;
 
@@ -374,6 +409,7 @@ void conf_unbind(struct conf *c, struct keybinding *unbind)
 		if ((key->keycode != 0 && key->keysym == NoSymbol &&
 		    key->keycode == unbind->keycode) ||
 		    key->keysym == unbind->keysym) {
+			conf_ungrab(c, key);
 			TAILQ_REMOVE(&c->keybindingq, key, entry);
 			xfree(key);
 		}