Add new request::urgent signal

This fix two things:

(1) Clients asking to be urgent while focussed, this have been reported
a few time for urxvt and I usually link a patch that fix this. This may
not be considered a bug by some, but I think it is.

(2) Add the ability to stop noisy clients from setting the urgent state
themselves.

ewmh.c

@@ -346,12 +346,18 @@ ewmh_process_state_atom(client_t *c, xcb_atom_t state, int set)
     }
     else if(state == _NET_WM_STATE_DEMANDS_ATTENTION)
     {
-        if(set == _NET_WM_STATE_REMOVE)
+        if(set == _NET_WM_STATE_REMOVE) {
-            client_set_urgent(L, -1, false);
+            lua_pushboolean(L, false);
-        else if(set == _NET_WM_STATE_ADD)
+            luaA_object_emit_signal(L, -2, "request::urgent", 1);
-            client_set_urgent(L, -1, true);
+        }
-        else if(set == _NET_WM_STATE_TOGGLE)
+        else if(set == _NET_WM_STATE_ADD) {
-            client_set_urgent(L, -1, !c->urgent);
+            lua_pushboolean(L, true);
+            luaA_object_emit_signal(L, -2, "request::urgent", 1);
+        }
+        else if(set == _NET_WM_STATE_TOGGLE) {
+            lua_pushboolean(L, !c->urgent);
+            luaA_object_emit_signal(L, -2, "request::urgent", 1);
+        }
     }
 
     lua_pop(L, 1);

lib/awful/ewmh.lua.in

@@ -10,6 +10,7 @@ local screen = screen
 local ipairs = ipairs
 local math = math
 local atag = require("awful.tag")
+local aclient = require("awful.client")
 
 --- Implements EWMH requests handling.
 -- awful.ewmh
@@ -158,8 +159,15 @@ function ewmh.tag(c, t)
     end
 end
 
+function ewmh.urgent(c, urgent)
+    if c ~= client.focus and not aclient.property.get(c,"ignore_urgent") then
+        c.urgent = urgent
+    end
+end
+
 client.connect_signal("request::activate", ewmh.activate)
 client.connect_signal("request::tag", ewmh.tag)
+client.connect_signal("request::urgent", ewmh.urgent)
 client.connect_signal("request::maximized_horizontal", maximized_horizontal)
 client.connect_signal("request::maximized_vertical", maximized_vertical)
 client.connect_signal("request::fullscreen", fullscreen)

objects/client.c

@@ -2524,6 +2524,7 @@ client_class_setup(lua_State *L)
     signal_add(&client_class.signals, "request::maximized_horizontal");
     signal_add(&client_class.signals, "request::maximized_vertical");
     signal_add(&client_class.signals, "request::tag");
+    signal_add(&client_class.signals, "request::urgent");
     signal_add(&client_class.signals, "tagged");
     signal_add(&client_class.signals, "unfocus");
     signal_add(&client_class.signals, "unmanage");

property.c

@@ -198,7 +198,9 @@ property_update_wm_hints(client_t *c, xcb_get_property_cookie_t cookie)
         return;
 
     luaA_object_push(L, c);
-    client_set_urgent(L, -1, xcb_icccm_wm_hints_get_urgency(&wmh));
+
+    lua_pushboolean(L, xcb_icccm_wm_hints_get_urgency(&wmh));
+    luaA_object_emit_signal(L, -2, "request::urgent", 1);
 
     if(wmh.flags & XCB_ICCCM_WM_HINT_INPUT)
         c->nofocus = !wmh.input;