@@ -940,6 +940,9 @@ /* got the type, the mwmhints, the protocols, and the normal hints
        (min/max sizes), so we're ready to set up the decorations/functions */
     client_setup_decor_and_functions(self);
   
+#ifdef SYNC
+    client_update_sync_request_counter(self);
+#endif
     client_get_client_machine(self);
     client_get_colormap(self);
     client_update_title(self);
@@ -1291,17 +1294,36 @@ self->delete_window = FALSE;
 
     if (PROP_GETA32(self->window, wm_protocols, atom, &proto, &num_return)) {
         for (i = 0; i < num_return; ++i) {
-            if (proto[i] == prop_atoms.wm_delete_window) {
+            if (proto[i] == prop_atoms.wm_delete_window)
                 /* this means we can request the window to close */
                 self->delete_window = TRUE;
-            } else if (proto[i] == prop_atoms.wm_take_focus)
+            else if (proto[i] == prop_atoms.wm_take_focus)
                 /* if this protocol is requested, then the window will be
                    notified whenever we want it to receive focus */
                 self->focus_notify = TRUE;
+#ifdef SYNC
+            else if (proto[i] == prop_atoms.net_wm_sync_request) 
+                /* if this protocol is requested, then the resizing the
+                   window will be synchronized between the frame and the
+                   client */
+                self->sync_request = TRUE;
+#endif
         }
         g_free(proto);
     }
 }
+
+#ifdef SYNC
+void client_update_sync_request_counter(ObClient *self)
+{
+    guint32 i;
+
+    if (PROP_GET32(self->window, net_wm_sync_request_counter, cardinal, &i)) {
+        self->sync_counter = i;
+    } else
+        self->sync_counter = None;
+}
+#endif
 
 static void client_get_gravity(ObClient *self)
 {
@@ -3097,10 +3119,11 @@ /* XXX do some stuff here if user is false to determine if we really want
        to activate it or not (a parent or group member is currently
        active)?
     */
-    ob_debug("Want to activate window 0x%x with time %u (last time %u), "
-             "source=%s\n",
-             self->window, event_curtime, last_time,
-             (user ? "user" : "application"));
+    ob_debug_type(OB_DEBUG_FOCUS,
+                  "Want to activate window 0x%x with time %u (last time %u), "
+                  "source=%s\n",
+                  self->window, event_curtime, last_time,
+                  (user ? "user" : "application"));
 
     if (!user && event_curtime && last_time &&
         !event_time_after(event_curtime, last_time))

@@ -219,6 +219,15 @@ gboolean can_focus;
     /*! Notify the window when it receives focus? */
     gboolean focus_notify;
 
+#ifdef SYNC
+    /*! The client wants to sync during resizes */
+    gboolean sync_request;
+    /*! The XSync counter used for synchronizing during resizes */
+    guint32 sync_counter;
+    /*! The value we're waiting for the counter to reach */
+    gulong sync_counter_value;
+#endif
+
     /*! The window uses shape extension to be non-rectangular? */
     gboolean shaped;
 
@@ -546,6 +555,10 @@ void client_update_transient_for(ObClient *self);
 /*! Update the protocols that the window supports and adjusts things if they
   change */
 void client_update_protocols(ObClient *self);
+#ifdef SYNC
+/*! Updates the window's sync request counter for resizes */
+void client_update_sync_request_counter(ObClient *self);
+#endif
 /*! Updates the window's colormap */
 void client_update_colormap(ObClient *self, Colormap colormap);
 /*! Updates the WMNormalHints and adjusts things if they change */

@@ -212,6 +212,13 @@ window = None;
             }
         } else
 #endif
+#ifdef SYNC
+        if (extensions_sync &&
+            e->type == extensions_sync_event_basep + XSyncAlarmNotify)
+        {
+            window = None;
+        } else
+#endif
             window = e->xany.window;
     }
     return window;
@@ -244,6 +251,13 @@ case LeaveNotify:
         t = e->xcrossing.time;
         break;
     default:
+#ifdef SYNC
+        if (extensions_sync &&
+            e->type == extensions_sync_event_basep + XSyncAlarmNotify)
+        {
+            t = ((XSyncAlarmNotifyEvent*)e)->time;
+        }
+#endif
         /* if more event types are anticipated, get their timestamp
            explicitly */
         break;
@@ -537,6 +551,15 @@ XConfigureWindow(ob_display, window,
                          e->xconfigurerequest.value_mask, &xwc);
         xerror_set_ignore(FALSE);
     }
+#ifdef SYNC
+    else if (extensions_sync &&
+        e->type == extensions_sync_event_basep + XSyncAlarmNotify)
+    {
+        XSyncAlarmNotifyEvent *se = (XSyncAlarmNotifyEvent*)e;
+        if (se->alarm == moveresize_alarm && moveresize_in_progress)
+            moveresize_event(e);
+    }
+#endif
 
     /* user input (action-bound) events */
     if (e->type == ButtonPress || e->type == ButtonRelease ||
@@ -1172,6 +1195,11 @@ }
         else if (msgtype == prop_atoms.net_wm_user_time) {
             client_update_user_time(client);
         }
+#ifdef SYNC
+        else if (msgtype == prop_atoms.net_wm_sync_request_counter) {
+            client_update_sync_request_counter(client);
+        }
+#endif
         else if (msgtype == prop_atoms.sm_client_id) {
             client_update_sm_client_id(client);
         }

@@ -21,6 +21,7 @@ #include "openbox.h"
 #include "geom.h"
 #include "extensions.h"
 #include "screen.h"
+#include "debug.h"
 
 gboolean extensions_xkb       = FALSE;
 gint     extensions_xkb_event_basep;
@@ -30,6 +31,8 @@ gboolean extensions_xinerama  = FALSE;
 gint     extensions_xinerama_event_basep;
 gboolean extensions_randr     = FALSE;
 gint     extensions_randr_event_basep;
+gboolean extensions_sync      = FALSE;
+gint     extensions_sync_event_basep;
 
 void extensions_query_all()
 {
@@ -58,6 +61,16 @@ #ifdef XRANDR
     extensions_randr =
         XRRQueryExtension(ob_display, &extensions_randr_event_basep,
                           &junk);
+#endif
+
+#ifdef SYNC
+    extensions_sync =
+        XSyncQueryExtension(ob_display, &extensions_sync_event_basep,
+                            &junk) &&
+        XSyncInitialize(ob_display, &junk, &junk);
+    if (!extensions_sync)
+        ob_debug("X Sync extension is not present on the server or is an "
+                 "incompatible version");
 #endif
 }
 

@@ -36,6 +36,9 @@ #endif
 #ifdef    XRANDR
 #include <X11/extensions/Xrandr.h>
 #endif
+#ifdef    SYNC
+#include <X11/extensions/sync.h>
+#endif
 
 #include <glib.h>
 
@@ -58,6 +61,11 @@ /*! Does the display have the RandR extension? */
 extern gboolean extensions_randr;
 /*! Base for events for the Randr extension */
 extern gint extensions_randr_event_basep;
+
+/*! Does the display have the Sync extension? */
+extern gboolean extensions_sync;
+/*! Base for events for the Sync extension */
+extern gint extensions_sync_event_basep;
 
 void extensions_query_all();
 

@@ -28,6 +28,9 @@ #include "resist.h"
 #include "popup.h"
 #include "moveresize.h"
 #include "config.h"
+#include "event.h"
+#include "debug.h"
+#include "extensions.h"
 #include "render/render.h"
 #include "render/theme.h"
 
@@ -36,6 +39,9 @@ #include <glib.h>
 
 gboolean moveresize_in_progress = FALSE;
 ObClient *moveresize_client = NULL;
+#ifdef SYNC
+XSyncAlarm moveresize_alarm = None;
+#endif
 
 static gboolean moving = FALSE; /* TRUE - moving, FALSE - resizing */
 
@@ -44,6 +50,9 @@ static gint cur_x, cur_y;
 static guint button;
 static guint32 corner;
 static ObCorner lockcorner;
+#ifdef SYNC
+static gboolean waiting_for_sync;
+#endif
 
 static ObPopup *popup = NULL;
 
@@ -164,6 +173,47 @@ cur = OB_CURSOR_MOVE;
     else
         g_assert_not_reached();
 
+#ifdef SYNC
+    if (!moving && extensions_shape && moveresize_client->sync_request &&
+        moveresize_client->sync_counter)
+    {
+        /* Initialize values for the resize syncing, and create an alarm for
+           the client's xsync counter */
+
+        XSyncValue val;
+        XSyncAlarmAttributes aa;
+
+        /* set the counter to an initial value */
+        XSyncIntToValue(&val, 0);
+        XSyncSetCounter(ob_display, moveresize_client->sync_counter, val);
+
+        /* this will be incremented when we tell the client what we're
+           looking for */
+        moveresize_client->sync_counter_value = 0;
+
+        /* the next sequence we're waiting for with the alarm */
+        XSyncIntToValue(&val, 1);
+
+        /* set an alarm on the counter */
+        aa.trigger.counter = moveresize_client->sync_counter;
+        aa.trigger.wait_value = val;
+        aa.trigger.value_type = XSyncAbsolute;
+        aa.trigger.test_type = XSyncPositiveTransition;
+        aa.events = True;
+        XSyncIntToValue(&aa.delta, 1);
+        moveresize_alarm = XSyncCreateAlarm(ob_display,
+                                            XSyncCACounter |
+                                            XSyncCAValue |
+                                            XSyncCAValueType |
+                                            XSyncCATestType |
+                                            XSyncCADelta |
+                                            XSyncCAEvents,
+                                            &aa);
+
+        waiting_for_sync = FALSE;
+    }
+#endif
+
     grab_pointer(TRUE, FALSE, cur);
     grab_keyboard(TRUE);
 }
@@ -180,6 +230,14 @@ client_move(moveresize_client,
                     (cancel ? start_cx : cur_x),
                     (cancel ? start_cy : cur_y));
     } else {
+#ifdef SYNC
+        /* turn off the alarm */
+        if (moveresize_alarm != None) {
+            XSyncDestroyAlarm(ob_display, moveresize_alarm);
+            moveresize_alarm = None;
+        }
+#endif
+
         client_configure(moveresize_client, lockcorner,
                          moveresize_client->area.x,
                          moveresize_client->area.y,
@@ -209,24 +267,56 @@ moveresize_client->frame->area.x,
                 moveresize_client->frame->area.y);
 }
 
-static void do_resize(gboolean resist)
+static void do_resize()
 {
-    /* resist_size_* needs the frame size */
-    cur_x += moveresize_client->frame->size.left +
-        moveresize_client->frame->size.right;
-    cur_y += moveresize_client->frame->size.top +
-        moveresize_client->frame->size.bottom;
+#ifdef SYNC
+    gint x, y, w, h, lw, lh;
+
+    /* see if it is actually going to resize */
+    x = moveresize_client->area.x;
+    y = moveresize_client->area.y;
+    w = cur_x;
+    h = cur_y;
+    client_try_configure(moveresize_client, lockcorner, &x, &y, &w, &h,
+                         &lw, &lh, TRUE);
+    if (w == moveresize_client->area.width &&
+        h == moveresize_client->area.height)
+    {
+        return;
+    }
+
+    if (extensions_sync && moveresize_client->sync_request &&
+        moveresize_client->sync_counter)
+    {
+        XEvent ce;
+        XSyncValue val;
+
+        /* are we already waiting for the sync counter to catch up? */
+        if (waiting_for_sync)
+            return;
+
+        /* increment the value we're waiting for */
+        ++moveresize_client->sync_counter_value;
+        XSyncIntToValue(&val, moveresize_client->sync_counter_value);
+
+        /* tell the client what we're waiting for */
+        ce.xclient.type = ClientMessage;
+        ce.xclient.message_type = prop_atoms.wm_protocols;
+        ce.xclient.display = ob_display;
+        ce.xclient.window = moveresize_client->window;
+        ce.xclient.format = 32;
+        ce.xclient.data.l[0] = prop_atoms.net_wm_sync_request;
+        ce.xclient.data.l[1] = event_curtime;
+        ce.xclient.data.l[2] = XSyncValueLow32(val);
+        ce.xclient.data.l[3] = XSyncValueHigh32(val);
+        ce.xclient.data.l[4] = 0l;
+        XSendEvent(ob_display, moveresize_client->window, FALSE,
+                   NoEventMask, &ce);
 
-    if (resist) {
-        resist_size_windows(moveresize_client, &cur_x, &cur_y, lockcorner);
-        resist_size_monitors(moveresize_client, &cur_x, &cur_y, lockcorner);
+        waiting_for_sync = TRUE;
     }
+#endif
 
-    cur_x -= moveresize_client->frame->size.left +
-        moveresize_client->frame->size.right;
-    cur_y -= moveresize_client->frame->size.top +
-        moveresize_client->frame->size.bottom;
- 
     client_configure(moveresize_client, lockcorner, 
                      moveresize_client->area.x, moveresize_client->area.y,
                      cur_x, cur_y, TRUE, FALSE);
@@ -243,6 +333,25 @@ moveresize_client->logical_size.width,
                      moveresize_client->logical_size.height);
 }
 
+static void calc_resize(gboolean resist)
+{
+    /* resist_size_* needs the frame size */
+    cur_x += moveresize_client->frame->size.left +
+        moveresize_client->frame->size.right;
+    cur_y += moveresize_client->frame->size.top +
+        moveresize_client->frame->size.bottom;
+
+    if (resist) {
+        resist_size_windows(moveresize_client, &cur_x, &cur_y, lockcorner);
+        resist_size_monitors(moveresize_client, &cur_x, &cur_y, lockcorner);
+    }
+
+    cur_x -= moveresize_client->frame->size.left +
+        moveresize_client->frame->size.right;
+    cur_y -= moveresize_client->frame->size.top +
+        moveresize_client->frame->size.bottom;
+}
+
 void moveresize_event(XEvent *e)
 {
     g_assert(moveresize_in_progress);
@@ -304,7 +413,8 @@ lockcorner = OB_CORNER_TOPLEFT;
             } else
                 g_assert_not_reached();
 
-            do_resize(TRUE);
+            calc_resize(TRUE);
+            do_resize();
         }
     } else if (e->type == KeyPress) {
         if (e->xkey.keycode == ob_keycode(OB_KEY_ESCAPE))
@@ -382,4 +492,11 @@ start_y += (py - opy) - (cur_y - oy);
             }
         }
     }
+#ifdef SYNC
+    else if (e->type == extensions_sync_event_basep + XSyncAlarmNotify)
+    {
+        waiting_for_sync = FALSE; /* we got our sync... */
+        do_resize(); /* ...so try resize if there is more change pending */
+    }
+#endif
 }

@@ -21,10 +21,17 @@ #define __moveresize_h
 
 #include <glib.h>
 
+#ifdef SYNC
+#include <X11/extensions/sync.h>
+#endif
+
 struct _ObClient;
 
 extern gboolean moveresize_in_progress;
 extern struct _ObClient *moveresize_client;
+#ifdef SYNC
+extern XSyncAlarm moveresize_alarm;
+#endif
 
 void moveresize_startup(gboolean reconfig);
 void moveresize_shutdown(gboolean reconfig);

@@ -91,7 +91,11 @@ CREATE(net_wm_user_time, "_NET_WM_USER_TIME");
     CREATE(net_frame_extents, "_NET_FRAME_EXTENTS");
 
 /*   CREATE(net_wm_ping, "_NET_WM_PING"); */
-  
+#ifdef SYNC
+    CREATE(net_wm_sync_request, "_NET_WM_SYNC_REQUEST");
+    CREATE(net_wm_sync_request_counter, "_NET_WM_SYNC_REQUEST_COUNTER");
+#endif
+
     CREATE(net_wm_window_type_desktop, "_NET_WM_WINDOW_TYPE_DESKTOP");
     CREATE(net_wm_window_type_dock, "_NET_WM_WINDOW_TYPE_DOCK");
     CREATE(net_wm_window_type_toolbar, "_NET_WM_WINDOW_TYPE_TOOLBAR");

@@ -99,7 +99,11 @@ Atom net_wm_user_time;
     Atom net_frame_extents;
 
     /* application protocols */
-/*  Atom   Atom net_wm_ping; */
+/*  Atom net_wm_ping; */
+#ifdef SYNC
+    Atom net_wm_sync_request;
+    Atom net_wm_sync_request_counter;
+#endif
 
     Atom net_wm_window_type_desktop;
     Atom net_wm_window_type_dock;

@@ -206,6 +206,9 @@ window, screen_support_win);
 
     /* set the _NET_SUPPORTED_ATOMS hint */
     num_support = 55;
+#ifdef SYNC
+    num_support += 2;
+#endif
     i = 0;
     supported = g_new(gulong, num_support);
     supported[i++] = prop_atoms.net_wm_full_placement;
@@ -262,11 +265,12 @@ supported[i++] = prop_atoms.net_moveresize_window;
     supported[i++] = prop_atoms.net_wm_moveresize;
     supported[i++] = prop_atoms.net_wm_user_time;
     supported[i++] = prop_atoms.net_frame_extents;
+#ifdef SYNC
+    supported[i++] = prop_atoms.net_wm_sync_request;
+    supported[i++] = prop_atoms.net_wm_sync_request_counter;
+#endif
     supported[i++] = prop_atoms.ob_wm_state_undecorated;
     g_assert(i == num_support);
-/*
-  supported[] = prop_atoms.net_wm_action_stick;
-*/
 
     PROP_SETA32(RootWindow(ob_display, ob_screen),
                 net_supported, atom, supported, num_support);