From 643d2a6b265a9da288b562d0c64233cd2621a880 Mon Sep 17 00:00:00 2001
From: David Delassus <david.jose.delassus@gmail.com>
Date: Fri, 4 May 2012 19:37:51 +0200
Subject: [PATCH] Manage _NET_WM_STATE_STICKY

---
 src/client.c | 23 ++++++++++++++++++++++-
 src/client.h |  1 +
 src/ewmh.c   | 32 ++++++++++++++++++++++++++++++++
 src/ewmh.h   |  1 +
 src/layout.c |  2 +-
 src/wmfs.h   |  1 +
 6 files changed, 58 insertions(+), 2 deletions(-)

diff --git a/src/client.c b/src/client.c
index 39c9bc6..1ae6e72 100644
--- a/src/client.c
+++ b/src/client.c
@@ -972,12 +972,14 @@ client_new(Window w, XWindowAttributes *wa, bool scan)
           client_apply_rule(c);
      }
 
+     ewmh_manage_state_sticky(c);
+
      /*
       * Conf option set per client, for possibility
       * to config only one client
       */
      c->border = c->theme->client_border_width;
-     if(!(c->tbarw = c->theme->client_titlebar_width))
+     if(!(c->tbarw = c->theme->client_titlebar_width) || (c->flags & CLIENT_STICKY))
           c->tbarw = c->border;
 
      c->ncol = c->theme->client_n;
@@ -1199,6 +1201,25 @@ client_moveresize(struct client *c, struct geo *g)
      client_configure(c);
 }
 
+void
+client_place_at_mouse(struct client *c)
+{
+     int x, y;
+
+     Window w;
+     int d, u;
+
+     XQueryPointer(W->dpy, W->root, &w, &w, &x, &y, &d, &d, (uint *)&u);
+
+     if(x < c->screen->ugeo.x)
+          x = 0;
+     if(y < c->screen->ugeo.y)
+          y = 0;
+
+     c->geo.x = ((x + c->geo.w) > c->screen->ugeo.w ? c->screen->ugeo.w - c->geo.w : x);
+     c->geo.y = ((y + c->geo.h) > c->screen->ugeo.h ? c->screen->ugeo.h - c->geo.h : y);
+}
+
 void
 client_maximize(struct client *c)
 {
diff --git a/src/client.h b/src/client.h
index 3783f80..0535aae 100644
--- a/src/client.h
+++ b/src/client.h
@@ -44,6 +44,7 @@ void client_geo_hints(struct geo *g, int *s);
 void client_get_sizeh(struct client *c);
 bool client_winsize(struct client *c, struct geo *geo);
 void client_moveresize(struct client *c, struct geo *g);
+void client_place_at_mouse(struct client *c);
 void client_maximize(struct client *c);
 void client_fac_resize(struct client *c, enum position p, int fac);
 void client_fac_adjust(struct client *c);
diff --git a/src/ewmh.c b/src/ewmh.c
index e2472ea..417a09f 100644
--- a/src/ewmh.c
+++ b/src/ewmh.c
@@ -227,6 +227,38 @@ ewmh_manage_state(long data[], struct client *c)
                     layout_fix_hole(c);
           }
      }
+
+}
+
+void
+ewmh_manage_state_sticky(struct client *c)
+{
+     Atom *atom, rf;
+     int f;
+     unsigned long n, il, i;
+     unsigned char *data = NULL;
+
+     if(XGetWindowProperty(W->dpy, c->win, W->net_atom[net_wm_state], 0L, 0x7FFFFFFFL, false,
+                           XA_ATOM, &rf, &f, &n, &il, &data) == Success && n)
+     {
+          atom = (Atom*)data;
+
+          for(i = 0; i < n; ++i)
+          {
+               /* manage _NET_WM_STATE_STICKY */
+               if(atom[i] == W->net_atom[net_wm_state_sticky])
+               {
+                    c->flags |= CLIENT_STICKY;
+                    c->flags |= CLIENT_FREE;
+
+                    client_place_at_mouse(c);
+
+                    break;
+               }
+          }
+
+          XFree(data);
+     }
 }
 
 void
diff --git a/src/ewmh.h b/src/ewmh.h
index 28535fe..9f8c958 100644
--- a/src/ewmh.h
+++ b/src/ewmh.h
@@ -124,6 +124,7 @@ void ewmh_get_client_list(void);
 long ewmh_get_xembed_state(Window win);
 void ewmh_update_wmfs_props(void);
 void ewmh_manage_state(long data[], struct client *c);
+void ewmh_manage_state_sticky(struct client *c);
 void ewmh_manage_window_type(struct client *c);
 bool ewmh_manage_window_type_desktop(Window win);
 
diff --git a/src/layout.c b/src/layout.c
index b73cea6..3d92dae 100644
--- a/src/layout.c
+++ b/src/layout.c
@@ -631,7 +631,7 @@ layout_client(struct client *c)
           return;
      }
 
-     if(c->flags & CLIENT_FREE)
+     if(c->flags & (CLIENT_FREE | CLIENT_STICKY))
      {
           layout_split_arrange_closed(c);
           c->flags ^= CLIENT_TILED;
diff --git a/src/wmfs.h b/src/wmfs.h
index d754f78..6479387 100644
--- a/src/wmfs.h
+++ b/src/wmfs.h
@@ -217,6 +217,7 @@ struct client
 #define CLIENT_TILED         0x2000
 #define CLIENT_MOUSE         0x4000
 #define CLIENT_IGNORE_TAG    0x8000
+#define CLIENT_STICKY        0x10000
      Flags flags;
      Window win, frame, tmp;
      SLIST_ENTRY(client) next;   /* Global list */