tag: add a hook for tag on select/unselect

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

awesomerc.lua.in

@@ -406,9 +406,8 @@ awful.hooks.manage.register(function (c, startup)
     -- c.size_hints_honor = false
 end)
 
--- Hook function to execute when arranging the screen.
--- (tag switch, new client, etc)
-awful.hooks.arrange.register(function (screen)
+-- Hook function to execute when switching tag selection.
+awful.hooks.tags.register(function (screen, tag, view)
     local layout = awful.layout.getname(awful.layout.get(screen))
     if layout and beautiful["layout_" ..layout] then
         mylayoutbox[screen].image = image(beautiful["layout_" .. layout])
@@ -418,7 +417,7 @@ awful.hooks.arrange.register(function (screen)
 
     -- Give focus to the latest client in history if no window has focus
     -- or if the current window is a desktop or a dock one.
-    if not client.focus then
+    if not client.focus or not client.focus:isvisible() then
         local c = awful.client.focus.history.get(screen, 0)
         if c then client.focus = c end
     end

hooks.c

@@ -123,7 +123,8 @@ luaA_hooks_clients(lua_State *L)
 
 /** Set the function called on each screen tag list change.
  * This function is called with a screen number as first argument,
- * the tag object as second and the action (add or remove) as third.
+ * the tag object as second and the action (add, remove, select or unselect)
+ * as third.
  * \param L The Lua VM state.
  * \return The number of elements pushed on stack.
  * \luastack

tag.c

@@ -54,10 +54,22 @@ luaA_tag_gc(lua_State *L)
 static void
 tag_view(tag_t *tag, bool view)
 {
+    int screen_index = screen_array_indexof(&globalconf.screens, tag->screen);
+
     tag->selected = view;
-    ewmh_update_net_current_desktop(screen_virttophys(screen_array_indexof(&globalconf.screens,
-                                                                           tag->screen)));
     tag->screen->need_arrange = true;
+    ewmh_update_net_current_desktop(screen_virttophys(screen_index));
+
+    if(globalconf.hooks.tags != LUA_REFNIL)
+    {
+        lua_pushnumber(globalconf.L, screen_index + 1);
+        tag_push(globalconf.L, tag);
+        if(view)
+            lua_pushliteral(globalconf.L, "select");
+        else
+            lua_pushliteral(globalconf.L, "unselect");
+        luaA_dofunction(globalconf.L, globalconf.hooks.tags, 3, 0);
+    }
 }
 
 /** Append a tag which on top of the stack to a screen.