hooks: add clients hook

Signed-off-by: Julien Danjou <julien@danjou.info>

client.c

@@ -456,8 +456,8 @@ client_manage(xcb_window_t w, xcb_get_geometry_reply_t *wgeom, int phys_screen,
     }
 
     /* Push client in client list */
-    client_list_push(&globalconf.clients, c);
-    client_ref(&c);
+    client_list_push(&globalconf.clients, client_ref(&c));
+
     /* Push client in stack */
     client_raise(c);
 
@@ -470,6 +470,9 @@ client_manage(xcb_window_t w, xcb_get_geometry_reply_t *wgeom, int phys_screen,
     ewmh_update_net_client_list(c->phys_screen);
     widget_invalidate_cache(c->screen, WIDGET_CACHE_CLIENTS);
 
+    /* Call hook to notify list change */
+    luaA_dofunction(globalconf.L, globalconf.hooks.clients, 0, 0);
+
     /* call hook */
     luaA_client_userdata_new(globalconf.L, c);
     luaA_dofunction(globalconf.L, globalconf.hooks.manage, 1, 0);
@@ -815,10 +818,19 @@ client_unmanage(client_t *c)
     if(globalconf.screens[c->phys_screen].client_focus == c)
         client_unfocus(c);
 
+    /* remove client everywhere */
+    client_list_detach(&globalconf.clients, c);
+    stack_client_delete(c);
+    for(int i = 0; i < tags->len; i++)
+        untag_client(c, tags->tab[i]);
+
     /* call hook */
     luaA_client_userdata_new(globalconf.L, c);
     luaA_dofunction(globalconf.L, globalconf.hooks.unmanage, 1, 0);
 
+    /* Call hook to notify list change */
+    luaA_dofunction(globalconf.L, globalconf.hooks.clients, 0, 0);
+
     /* The server grab construct avoids race conditions. */
     xcb_grab_server(globalconf.connection);
 
@@ -833,12 +845,6 @@ client_unmanage(client_t *c)
     xcb_flush(globalconf.connection);
     xcb_ungrab_server(globalconf.connection);
 
-    /* remove client everywhere */
-    client_list_detach(&globalconf.clients, c);
-    stack_client_delete(c);
-    for(int i = 0; i < tags->len; i++)
-        untag_client(c, tags->tab[i]);
-
     titlebar_client_detach(c);
 
     ewmh_update_net_client_list(c->phys_screen);
@@ -1035,6 +1041,10 @@ luaA_client_swap(lua_State *L)
     client_need_arrange(*swap);
     widget_invalidate_cache((*c)->screen, WIDGET_CACHE_CLIENTS);
     widget_invalidate_cache((*swap)->screen, WIDGET_CACHE_CLIENTS);
+
+    /* Call hook to notify list change */
+    luaA_dofunction(L, globalconf.hooks.clients, 0, 0);
+
     return 0;
 }
 

luaa.c

@@ -218,6 +218,19 @@ luaA_hooks_mouse_over(lua_State *L)
     return luaA_hooks_mouse_enter(L);
 }
 
+/** Set the function called on each client list change.
+ * This function is called without any argument.
+ * \param L The Lua VM state.
+ * \return The number of elements pushed on stack.
+ * \luastack
+ * \lparam A function to call on each client list change.
+ */
+static int
+luaA_hooks_clients(lua_State *L)
+{
+    return luaA_registerfct(L, 1, &globalconf.hooks.clients);
+}
+
 /** Set the function called on each screen arrange. This function is called
  * with the screen number as argument.
  * \param L The Lua VM state.
@@ -611,6 +624,7 @@ luaA_init(void)
         { "mouse_enter", luaA_hooks_mouse_enter },
         { "property", luaA_hooks_property },
         { "arrange", luaA_hooks_arrange },
+        { "clients", luaA_hooks_clients },
         { "timer", luaA_hooks_timer },
         /* deprecated */
         { "mouse_over", luaA_hooks_mouse_over },
@@ -686,6 +700,7 @@ luaA_init(void)
     globalconf.hooks.unfocus = LUA_REFNIL;
     globalconf.hooks.mouse_enter = LUA_REFNIL;
     globalconf.hooks.arrange = LUA_REFNIL;
+    globalconf.hooks.clients = LUA_REFNIL;
     globalconf.hooks.property = LUA_REFNIL;
     globalconf.hooks.timer = LUA_REFNIL;
 }

mouse.c

@@ -551,6 +551,7 @@ mouse_client_move(client_t *c, int snap, bool infobox)
             {
                 client_list_swap(&globalconf.clients, c, target);
                 globalconf.screens[c->screen].need_arrange = true;
+                luaA_dofunction(globalconf.L, globalconf.hooks.clients, 0, 0);
                 layout_refresh();
                 wibox_refresh();
                 xcb_flush(globalconf.connection);

structs.h

@@ -435,6 +435,8 @@ struct awesome_t
         luaA_ref mouse_enter;
         /** Command to run on arrange */
         luaA_ref arrange;
+        /** Command to run when client list changes */
+        luaA_ref clients;
         /** Command to run on property change */
         luaA_ref property;
         /** Command to run on time */