client: add support for the sticky attribute

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

client.c

@@ -131,7 +131,11 @@ client_maybevisible(client_t *c, int screen)
 {
     if(c->screen == screen)
     {
+        if(c->issticky)
+            return true;
+
         tag_array_t *tags = &globalconf.screens[screen].tags;
+
         for(int i = 0; i < tags->len; i++)
             if(tags->tab[i]->selected && is_client_tagged(c, tags->tab[i]))
                 return true;
@@ -629,6 +633,21 @@ client_setfloating(client_t *c, bool floating)
     }
 }
 
+/** Set a client sticky, or not.
+ * \param c The client.
+ * \param s Set or not the client sticky.
+ */
+void
+client_setsticky(client_t *c, bool s)
+{
+    if(c->issticky != s)
+    {
+        client_need_arrange(c);
+        c->issticky = s;
+        client_need_arrange(c);
+    }
+}
+
 /** Save client properties as an X property.
  * \param c The client.
  */
@@ -1181,6 +1200,9 @@ luaA_client_newindex(lua_State *L)
       case A_TK_FLOATING:
         client_setfloating(*c, luaA_checkboolean(L, 3));
         break;
+      case A_TK_STICKY:
+        client_setsticky(*c, luaA_checkboolean(L, 3));
+        break;
       case A_TK_HONORSIZEHINTS:
         (*c)->honorsizehints = luaA_checkboolean(L, 3);
         client_need_arrange(*c);
@@ -1352,6 +1374,9 @@ luaA_client_index(lua_State *L)
       case A_TK_FLOATING:
         lua_pushboolean(L, (*c)->isfloating);
         break;
+      case A_TK_STICKY:
+        lua_pushboolean(L, (*c)->issticky);
+        break;
       case A_TK_HONORSIZEHINTS:
         lua_pushboolean(L, (*c)->honorsizehints);
         break;

client.h

@@ -51,6 +51,7 @@ bool client_updatetitle(client_t *);
 void client_saveprops(client_t *);
 void client_kill(client_t *);
 void client_setfloating(client_t *, bool);
+void client_setsticky(client_t *, bool);
 void client_setborder(client_t *, int);
 
 int luaA_client_newindex(lua_State *);

common/tokenize.gperf

@@ -52,6 +52,7 @@ selected
 shadow
 shadow_offset
 show_icons
+sticky
 text
 ticks_count
 ticks_gap

ewmh.c

@@ -252,9 +252,10 @@ ewmh_process_state_atom(client_t *c, xcb_atom_t state, int set)
 {
     if(state == _NET_WM_STATE_STICKY)
     {
-        tag_array_t *tags = &globalconf.screens[c->screen].tags;
-        for(int i = 0; i < tags->len; i++)
-            tag_client(c, tags->tab[i]);
+        if(set == _NET_WM_STATE_REMOVE)
+            client_setsticky(c, false);
+        else if(set == _NET_WM_STATE_ADD)
+            client_setsticky(c, true);
     }
     else if(state == _NET_WM_STATE_SKIP_TASKBAR)
     {
@@ -432,8 +433,7 @@ ewmh_process_client_message(xcb_client_message_event_t *ev)
             tag_array_t *tags = &globalconf.screens[c->screen].tags;
 
             if(ev->data.data32[0] == 0xffffffff)
-                for(int i = 0; i < tags->len; i++)
-                    tag_client(c, tags->tab[i]);
+                c->issticky = true;
             else
                 for(int i = 0; i < tags->len; i++)
                     if((int)ev->data.data32[0] == i)
@@ -482,8 +482,7 @@ ewmh_check_client_hints(client_t *c)
 
         desktop = *(uint32_t *) data;
         if(desktop == -1)
-            for(int i = 0; i < tags->len; i++)
-                tag_client(c, tags->tab[i]);
+            c->issticky = true;
         else
             for(int i = 0; i < tags->len; i++)
                 if(desktop == i)

structs.h

@@ -269,6 +269,8 @@ struct client_t
     xcolor_t border_color;
     /** True if the client does not want any border */
     bool noborder;
+    /** True if the client is sticky */
+    bool issticky;
     /** Has urgency hint */
     bool isurgent;
     /** Store previous floating state before maximizing */