[client] Add client.name_set() function and hook on title update

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

client.c

@@ -191,6 +191,11 @@ client_updatetitle(client_t *c)
 
     p_delete(&c->name);
     c->name = name;
+
+    /* call hook */
+    luaA_client_userdata_new(c);
+    luaA_dofunction(globalconf.L, globalconf.hooks.titleupdate, 1);
+
     titlebar_draw(c);
     widget_invalidate_cache(c->screen, WIDGET_CACHE_CLIENTS);
 }
@@ -1102,6 +1107,16 @@ luaA_client_name_get(lua_State *L)
     return 1;
 }
 
+static int
+luaA_client_name_set(lua_State *L)
+{
+    client_t **c = luaL_checkudata(L, 1, "client");
+    const char *name = luaL_checkstring(L, 2);
+    p_delete(&(*c)->name);
+    (*c)->name = a_strdup(name);
+    return 0;
+}
+
 int
 luaA_client_userdata_new(client_t *c)
 {
@@ -1121,6 +1136,7 @@ const struct luaL_reg awesome_client_methods[] =
 const struct luaL_reg awesome_client_meta[] =
 {
     { "name_get", luaA_client_name_get },
+    { "name_set", luaA_client_name_set },
     { "titlebar_set", luaA_client_titlebar_set },
     { "screen_set", luaA_client_screen_set },
     { "screen_get", luaA_client_screen_get },

lua.c

@@ -267,6 +267,16 @@ luaA_hooks_arrange(lua_State *L)
     return 0;
 }
 
+static int
+luaA_hooks_titleupdate(lua_State *L)
+{
+    luaA_checkfunction(L, 1);
+    if(globalconf.hooks.titleupdate)
+        luaL_unref(L, LUA_REGISTRYINDEX, globalconf.hooks.titleupdate);
+    globalconf.hooks.titleupdate = luaL_ref(L, LUA_REGISTRYINDEX);
+    return 0;
+}
+
 static void
 luaA_openlib(lua_State *L, const char *name,
              const struct luaL_reg methods[],
@@ -335,6 +345,7 @@ luaA_parserc(const char *rcfile)
         { "newclient", luaA_hooks_newclient },
         { "mouseover", luaA_hooks_mouseover },
         { "arrange", luaA_hooks_arrange },
+        { "titleupdate", luaA_hooks_titleupdate },
         { NULL, NULL }
     };
 

structs.h

@@ -418,6 +418,8 @@ struct awesome_t
         luaA_function mouseover;
         /** Command to run on arrange */
         luaA_function arrange;
+        /** Command to run on title change */
+        luaA_function titleupdate;
     } hooks;
 };