From f8dedf723182275064a0496fa3cb6a2f84fee888 Mon Sep 17 00:00:00 2001
From: Martin Duquesnoy <xorg62@gmail.com>
Date: Mon, 23 Jan 2012 12:15:11 +0100
Subject: [PATCH] Add systray functions

---
 src/systray.c | 146 ++++++++++++++++++++++++++++++++++++++++++++++++++
 src/systray.h |  18 +++++++
 src/wmfs.h    |   1 +
 3 files changed, 165 insertions(+)

diff --git a/src/systray.c b/src/systray.c
index e69de29..5758414 100644
--- a/src/systray.c
+++ b/src/systray.c
@@ -0,0 +1,146 @@
+/*
+ *  wmfs2 by Martin Duquesnoy <xorg62@gmail.com> { for(i = 2011; i < 2111; ++i) ©(i); }
+ *  For license, see COPYING.
+ */
+
+#include "wmfs.h"
+#include "systray.h"
+
+bool
+systray_acquire(void)
+{
+     XSetWindowAttributes wattr =
+          {
+               .event_mask = ButtonPressMask | ExposureMask,
+               .override_redirect = true,
+               .background_pixmap = ParentRelative,
+               .background_pixel  = 0
+          };
+
+     if(!(W->flags & WMFS_SYSTRAY) || W->systray.win)
+          return false;
+
+     if(XGetSelectionOwner(W->dpy, W->net_atom[net_system_tray_s]) != None)
+     {
+          warnx("Can't initialize system tray: owned by another process.");
+          return False;
+     }
+
+     /* Init traywin window */
+     XChangeWindowAttributes(W->dpy, W->systray.win, CWEventMask | CWOverrideRedirect | CWBackPixel, &wattr);
+     XSelectInput(W->dpy, W->systray.win, KeyPressMask | ButtonPressMask);
+     XMapRaised(W->dpy, W->systray.win);
+     XSetSelectionOwner(W->dpy, W->net_atom[net_system_tray_s], W->systray.win, CurrentTime);
+
+     if(XGetSelectionOwner(W->dpy, W->net_atom[net_system_tray_s]) != W->systray.win)
+     {
+          systray_freeicons();
+          warnx("System tray: can't get systray manager");
+
+          return false;
+     }
+
+     ewmh_send_message(W->root, W->root, "MANAGER", CurrentTime,
+                       W->net_atom[net_system_tray_s], W->systray.win, 0, 0);
+
+     XSync(dpy, false);
+
+     return true;
+}
+
+void
+systray_add(Window win)
+{
+     struct _systray *s;
+
+     if(!(W->flags & WMFS_SYSTRAY))
+          return;
+
+     s = xcalloc(1, sizeof(struct _systray));
+     s->win = win;
+
+     s->geo.h = W->systray.barwin->geo.h;
+     s->geo.w = W->systray.barwin->geo.w + 2;
+
+     ewmh_set_win_state(s->win, WithdrawnState);
+     XSelectInput(W->dpy, s->win, StructureNotifyMask | PropertyChangeMask| EnterWindowMask | FocusChangeMask);
+     XReparentWindow(W->dpy, s->win, W->systray.win, 0, 0);
+
+     ewmh_send_message(s->win, s->win, "_XEMBED", CurrentTime,
+                       XEMBED_EMBEDDED_NOTIFY, 0, W->systray,win, 0);
+
+     SLIST_INSERT_HEAD(&W->systray.head, s, next);
+}
+
+void
+systray_del(struct _systray *s)
+{
+     if(!(W->flags & WMFS_SYSTRAY))
+          return;
+
+     SLIST_REMOVE(&W->systray.head, s, _systray, next);
+     free(s);
+}
+
+void
+systray_state(struct _systray *s)
+{
+     long flags;
+     int code = 0;
+
+     if(!(W->flags & WMFS_SYSTRAY) || !(flags = ewmh_get_xembed_state(s->win)))
+          return;
+
+     if(flags & XEMBED_MAPPED)
+     {
+          code = XEMBED_WINDOW_ACTIVATE;
+          XMapRaised(W->dpy, s->win);
+          ewmh_set_win_state(s->win, NormalState);
+     }
+     else
+     {
+          code = XEMBED_WINDOW_DEACTIVATE;
+          XUnmapWindow(W->dpy, s->win);
+          ewmh_set_win_state(s->win, WithdrawnState);
+     }
+
+     ewmh_send_message(s->win, s->win, "_XEMBED", CurrentTime, code, 0, 0, 0);
+}
+
+void
+systray_freeicons(void)
+{
+     struct _systray *i;
+
+     if(!(W->flags & WMFS_SYSTRAY))
+          return;
+
+     while(!SLIST_EMPTY(&W->systray.head))
+     {
+          i = SLIST_FIRST(&W->systray.head);
+          SLIST_REMOVE_HEAD(&W->systray.head, next);
+
+          XUnmapWindow(dpy, i->win);
+          XReparentWindow(dpy, i->win, W->root, 0, 0);
+          free(i);
+     }
+
+     XSetSelectionOwner(W->dpy, W->net_atom[net_system_tray_s], None, CurrentTime);
+     XDestroyWindow(W->dpy, W->systray.win);
+     XSync(W->dpy, false);
+}
+
+struct _systray*
+systray_find(Window win)
+{
+     struct _systray *i;
+
+     if(!(W->flags & WMFS_SYSTRAY))
+          return NULL;
+
+     SLIST_FOREACH(i, &W->systray.head, next)
+          if(i->win == win)
+               return i;
+
+     return NULL;
+}
diff --git a/src/systray.h b/src/systray.h
index e69de29..dc61405 100644
--- a/src/systray.h
+++ b/src/systray.h
@@ -0,0 +1,18 @@
+/*
+ *  wmfs2 by Martin Duquesnoy <xorg62@gmail.com> { for(i = 2011; i < 2111; ++i) ©(i); }
+ *  For license, see COPYING.
+ */
+
+#ifndef SYSTRAY_H
+#define SYSTRAY_H
+
+#include "wmfs.h"
+
+bool systray_acquire(void);
+void systray_add(Window win);
+void systray_del(struct _systray *s);
+void systray_state(struct _systray *s);
+void systray_freeicons(void);
+struct _systray *systray_find(Window win);
+
+#endif /* SYSTRAY_H */
diff --git a/src/wmfs.h b/src/wmfs.h
index bab8373..effdc90 100644
--- a/src/wmfs.h
+++ b/src/wmfs.h
@@ -345,6 +345,7 @@ struct wmfs
       */
      struct
      {
+          struct barwin *barwin;
           Window win;
           SLIST_HEAD(, _systray) head;
      } systray;