]> Dogcows Code - chaz/openbox/blobdiff - openbox/client.c
add a reconfigure action, also reconfigure on SIGUSR2.
[chaz/openbox] / openbox / client.c
index 1f1d80328e5bbeb21cbf492a332fea937f669ac4..0d08f0f4693748b8e9d898a7e4768f2d89e84a54 100644 (file)
@@ -5,6 +5,7 @@
 #include "startup.h"
 #include "screen.h"
 #include "moveresize.h"
+#include "place.h"
 #include "prop.h"
 #include "extensions.h"
 #include "frame.h"
 #include "grab.h"
 #include "focus.h"
 #include "stacking.h"
-#include "dispatch.h"
 #include "openbox.h"
 #include "group.h"
 #include "config.h"
-#include "menu.h"
+#include "menuframe.h"
+#include "keyboard.h"
+#include "mouse.h"
 #include "render/render.h"
 
 #include <glib.h>
@@ -30,7 +32,8 @@
 #define CLIENT_NOPROPAGATEMASK (ButtonPressMask | ButtonReleaseMask | \
                                ButtonMotionMask)
 
-GList      *client_list      = NULL;
+GList      *client_list        = NULL;
+GSList     *client_destructors = NULL;
 
 static void client_get_all(ObClient *self);
 static void client_toggle_border(ObClient *self, gboolean show);
@@ -45,14 +48,28 @@ static void client_change_allowed_actions(ObClient *self);
 static void client_change_state(ObClient *self);
 static void client_apply_startup_state(ObClient *self);
 static void client_restore_session_state(ObClient *self);
+static void client_restore_session_stacking(ObClient *self);
+static void client_urgent_notify(ObClient *self);
 
-void client_startup()
+void client_startup(gboolean reconfig)
 {
+    if (reconfig) return;
+
     client_set_list();
 }
 
-void client_shutdown()
+void client_shutdown(gboolean reconfig)
+{
+}
+
+void client_add_destructor(GDestroyNotify func)
+{
+    client_destructors = g_slist_prepend(client_destructors, (gpointer)func);
+}
+
+void client_remove_destructor(GDestroyNotify func)
 {
+    client_destructors = g_slist_remove(client_destructors, (gpointer)func);
 }
 
 void client_set_list()
@@ -230,7 +247,7 @@ void client_manage(Window window)
 
     /* create the ObClient struct, and populate it from the hints on the
        window */
-    self = g_new(ObClient, 1);
+    self = g_new0(ObClient, 1);
     self->obwin.type = Window_Client;
     self->window = window;
 
@@ -251,14 +268,15 @@ void client_manage(Window window)
 
     frame_grab_client(self->frame, self);
 
-    client_apply_startup_state(self);
-
     grab_server(FALSE);
 
+    client_apply_startup_state(self);
+
     /* update the focus lists */
     focus_order_add_new(self);
 
     stacking_add(CLIENT_AS_WINDOW(self));
+    client_restore_session_stacking(self);
 
     /* focus the new window? */
     if (ob_state() != OB_STATE_STARTING && config_focus_new &&
@@ -268,6 +286,8 @@ void client_manage(Window window)
         (self->type == OB_CLIENT_TYPE_NORMAL ||
          self->type == OB_CLIENT_TYPE_DIALOG))
     {        
+        activate = TRUE;
+#if 0
         if (self->desktop != screen_desktop) {
             /* activate the window */
             activate = TRUE;
@@ -297,14 +317,24 @@ void client_manage(Window window)
                 activate = TRUE;
             }
         }
+#endif
     }
 
-    dispatch_client(Event_Client_New, self, 0, 0);
+    if (ob_state() == OB_STATE_RUNNING) {
+        int x = self->area.x, ox = x;
+        int y = self->area.y, oy = y;
 
-    /* make sure the window is visible */
-    client_move_onscreen(self, TRUE);
+        place_client(self, &x, &y);
 
-    screen_update_areas();
+        /* make sure the window is visible */
+        client_find_onscreen(self, &x, &y,
+                             self->frame->area.width,
+                             self->frame->area.height,
+                             client_normal(self));
+
+        if (x != ox || y != oy)
+            client_move(self, x, y);
+    }
 
     client_showhide(self);
 
@@ -324,10 +354,14 @@ void client_manage(Window window)
     client_list = g_list_append(client_list, self);
     g_hash_table_insert(window_map, &self->window, self);
 
+    /* this has to happen after we're in the client_list */
+    screen_update_areas();
+
     /* update the list hints */
     client_set_list();
 
-    dispatch_client(Event_Client_Mapped, self, 0, 0);
+    keyboard_grab_for_client(self, TRUE);
+    mouse_grab_for_client(self, TRUE);
 
     ob_debug("Managed window 0x%lx (%s)\n", window, self->class);
 }
@@ -338,13 +372,6 @@ void client_unmanage_all()
        client_unmanage(client_list->data);
 }
 
-/* called by client_unmanage() to close any menus referencing this client */
-void client_close_menus(gpointer key, gpointer value, gpointer self)
-{
-    if (((ObMenu *)value)->client == (ObClient *)self)
-        menu_hide((ObMenu *)value);
-}
-
 void client_unmanage(ObClient *self)
 {
     guint j;
@@ -352,9 +379,11 @@ void client_unmanage(ObClient *self)
 
     ob_debug("Unmanaging window: %lx (%s)\n", self->window, self->class);
 
-    dispatch_client(Event_Client_Destroy, self, 0, 0);
     g_assert(self != NULL);
 
+    keyboard_grab_for_client(self, FALSE);
+    mouse_grab_for_client(self, FALSE);
+
     /* remove the window from our save set */
     XChangeSaveSet(ob_display, self->window, SetModeDelete);
 
@@ -395,13 +424,11 @@ void client_unmanage(ObClient *self)
         }
     }
 
-    if (moveresize_client == self)
-        moveresize_end(TRUE);
-
-    /* close any windows that are attached to this window */
-    g_hash_table_foreach(menu_hash, client_close_menus, self);
-
-    
+    for (it = client_destructors; it; it = g_slist_next(it)) {
+        GDestroyNotify func = (GDestroyNotify) it->data;
+        func(self);
+    }
+        
     if (focus_client == self) {
         XEvent e;
 
@@ -417,10 +444,6 @@ void client_unmanage(ObClient *self)
         self->group = NULL;
     }
 
-    /* dispatch the unmapped event */
-    dispatch_client(Event_Client_Unmapped, self, 0, 0);
-    g_assert(self != NULL);
-
     /* give the client its border back */
     client_toggle_border(self, TRUE);
 
@@ -461,32 +484,65 @@ void client_unmanage(ObClient *self)
     client_set_list();
 }
 
+static void client_urgent_notify(ObClient *self)
+{
+    if (self->urgent)
+        frame_flash_start(self->frame);
+    else
+        frame_flash_stop(self->frame);
+}
+
 static void client_restore_session_state(ObClient *self)
 {
-    ObSessionState *s;
+    GList *it;
 
-    s = session_state_find(self);
-    if (!(s)) return;
+    if (!(it = session_state_find(self)))
+        return;
+
+    self->session = it->data;
 
-    RECT_SET(self->area, s->x, s->y, s->w, s->h);
+    RECT_SET(self->area, self->session->x, self->session->y,
+             self->session->w, self->session->h);
     self->positioned = TRUE;
-    XResizeWindow(ob_display, self->window, s->w, s->h);
+    XResizeWindow(ob_display, self->window,
+                  self->session->w, self->session->h);
 
-    self->desktop = s->desktop == DESKTOP_ALL ? s->desktop :
-        MIN(screen_num_desktops - 1, s->desktop);
+    self->desktop = (self->session->desktop == DESKTOP_ALL ?
+                     self->session->desktop :
+                     MIN(screen_num_desktops - 1, self->session->desktop));
     PROP_SET32(self->window, net_wm_desktop, cardinal, self->desktop);
 
-    self->shaded = s->shaded;
-    self->iconic = s->iconic;
-    self->skip_pager = s->skip_pager;
-    self->skip_taskbar = s->skip_taskbar;
-    self->fullscreen = s->fullscreen;
-    self->above = s->above;
-    self->below = s->below;
-    self->max_horz = s->max_horz;
-    self->max_vert = s->max_vert;
+    self->shaded = self->session->shaded;
+    self->iconic = self->session->iconic;
+    self->skip_pager = self->session->skip_pager;
+    self->skip_taskbar = self->session->skip_taskbar;
+    self->fullscreen = self->session->fullscreen;
+    self->above = self->session->above;
+    self->below = self->session->below;
+    self->max_horz = self->session->max_horz;
+    self->max_vert = self->session->max_vert;
+}
+
+static void client_restore_session_stacking(ObClient *self)
+{
+    GList *it;
+
+    if (!self->session) return;
 
-    session_state_free(s);
+    it = g_list_find(session_saved_state, self->session);
+    for (it = g_list_previous(it); it; it = g_list_previous(it)) {
+        GList *cit;
+
+        for (cit = client_list; cit; cit = g_list_next(cit))
+            if (session_state_cmp(it->data, cit->data))
+                break;
+        if (cit) {
+            client_calc_layer(self);
+            stacking_below(CLIENT_AS_WINDOW(self),
+                           CLIENT_AS_WINDOW(cit->data));
+            break;
+        }
+    }
 }
 
 void client_move_onscreen(ObClient *self, gboolean rude)
@@ -496,9 +552,7 @@ void client_move_onscreen(ObClient *self, gboolean rude)
     if (client_find_onscreen(self, &x, &y,
                              self->frame->area.width,
                              self->frame->area.height, rude)) {
-        client_configure(self, OB_CORNER_TOPLEFT, x, y,
-                         self->area.width, self->area.height,
-                         TRUE, TRUE);
+        client_move(self, x, y);
     }
 }
 
@@ -615,25 +669,11 @@ static void client_toggle_border(ObClient *self, gboolean show)
 
 static void client_get_all(ObClient *self)
 {
-    /* update EVERYTHING!! */
-
-    self->ignore_unmaps = 0;
-  
-    /* defaults */
-    self->frame = NULL;
-    self->title = self->icon_title = NULL;
+    /* non-zero defaults */
     self->title_count = 1;
-    self->name = self->class = self->role = NULL;
     self->wmstate = NormalState;
-    self->transient = FALSE;
-    self->transients = NULL;
-    self->transient_for = NULL;
     self->layer = -1;
-    self->urgent = FALSE;
-    self->positioned = FALSE;
     self->decorate = TRUE;
-    self->group = NULL;
-    self->nicons = 0;
 
     client_get_area(self);
     client_update_transient_for(self);
@@ -998,20 +1038,22 @@ void client_update_normal_hints(ObClient *self)
 void client_setup_decor_and_functions(ObClient *self)
 {
     /* start with everything (cept fullscreen) */
-    self->decorations = (OB_FRAME_DECOR_TITLEBAR |
-                         OB_FRAME_DECOR_HANDLE |
-                         OB_FRAME_DECOR_GRIPS |
-                         OB_FRAME_DECOR_BORDER |
-                         OB_FRAME_DECOR_ICON |
-                         OB_FRAME_DECOR_ALLDESKTOPS |
-                         OB_FRAME_DECOR_ICONIFY |
-                         OB_FRAME_DECOR_MAXIMIZE |
-                         OB_FRAME_DECOR_SHADE);
-    self->functions = (OB_CLIENT_FUNC_RESIZE |
-                       OB_CLIENT_FUNC_MOVE |
-                       OB_CLIENT_FUNC_ICONIFY |
-                       OB_CLIENT_FUNC_MAXIMIZE |
-                       OB_CLIENT_FUNC_SHADE);
+    self->decorations =
+        (OB_FRAME_DECOR_TITLEBAR |
+         (ob_rr_theme->show_handle ? OB_FRAME_DECOR_HANDLE : 0) |
+         OB_FRAME_DECOR_GRIPS |
+         OB_FRAME_DECOR_BORDER |
+         OB_FRAME_DECOR_ICON |
+         OB_FRAME_DECOR_ALLDESKTOPS |
+         OB_FRAME_DECOR_ICONIFY |
+         OB_FRAME_DECOR_MAXIMIZE |
+         OB_FRAME_DECOR_SHADE);
+    self->functions =
+        (OB_CLIENT_FUNC_RESIZE |
+         OB_CLIENT_FUNC_MOVE |
+         OB_CLIENT_FUNC_ICONIFY |
+         OB_CLIENT_FUNC_MAXIMIZE |
+         OB_CLIENT_FUNC_SHADE);
     if (self->delete_window) {
        self->functions |= OB_CLIENT_FUNC_CLOSE;
         self->decorations |= OB_FRAME_DECOR_CLOSE;
@@ -1094,10 +1136,14 @@ void client_setup_decor_and_functions(ObClient *self)
         self->decorations &= ~OB_FRAME_DECOR_MAXIMIZE;
     }
 
+    /* kill the handle on fully maxed windows */
+    if (self->max_vert && self->max_horz)
+        self->decorations &= ~OB_FRAME_DECOR_HANDLE;
+
     /* finally, the user can have requested no decorations, which overrides
        everything */
     if (!self->decorate)
-        self->decorations = 0;
+        self->decorations = OB_FRAME_DECOR_BORDER;
 
     /* if we don't have a titlebar, then we cannot shade! */
     if (!(self->decorations & OB_FRAME_DECOR_TITLEBAR))
@@ -1114,13 +1160,8 @@ void client_setup_decor_and_functions(ObClient *self)
     client_change_allowed_actions(self);
 
     if (self->frame) {
-        /* this makes sure that these windows appear on all desktops */
-        if (self->type == OB_CLIENT_TYPE_DESKTOP &&
-            self->desktop != DESKTOP_ALL)
-            client_set_desktop(self, DESKTOP_ALL, FALSE);
-
-       /* adjust the client's decorations, etc. */
-       client_reconfigure(self);
+        /* adjust the client's decorations, etc. */
+        client_reconfigure(self);
     } else {
         /* this makes sure that these windows appear on all desktops */
         if (self->type == OB_CLIENT_TYPE_DESKTOP &&
@@ -1263,7 +1304,7 @@ void client_update_wmhints(ObClient *self)
        /* fire the urgent callback if we're mapped, otherwise, wait until
           after we're mapped */
        if (self->frame)
-            dispatch_client(Event_Client_Urgent, self, self->urgent, 0);
+            client_urgent_notify(self);
     }
 }
 
@@ -1376,12 +1417,13 @@ void client_update_strut(ObClient *self)
     guint num;
     guint32 *data;
     gboolean got = FALSE;
+    StrutPartial strut;
 
     if (PROP_GETA32(self->window, net_wm_strut_partial, cardinal,
                     &data, &num)) {
         if (num == 12) {
             got = TRUE;
-            STRUT_PARTIAL_SET(self->strut,
+            STRUT_PARTIAL_SET(strut,
                               data[0], data[2], data[1], data[3],
                               data[4], data[5], data[8], data[9],
                               data[6], data[7], data[10], data[11]);
@@ -1393,7 +1435,7 @@ void client_update_strut(ObClient *self)
         PROP_GETA32(self->window, net_wm_strut, cardinal, &data, &num)) {
         if (num == 4) {
             got = TRUE;
-            STRUT_PARTIAL_SET(self->strut,
+            STRUT_PARTIAL_SET(strut,
                               data[0], data[2], data[1], data[3],
                               0, 0, 0, 0, 0, 0, 0, 0);
         }
@@ -1401,13 +1443,17 @@ void client_update_strut(ObClient *self)
     }
 
     if (!got)
-        STRUT_PARTIAL_SET(self->strut, 0, 0, 0, 0,
+        STRUT_PARTIAL_SET(strut, 0, 0, 0, 0,
                           0, 0, 0, 0, 0, 0, 0, 0);
 
-    /* updating here is pointless while we're being mapped cuz we're not in
-       the client list yet */
-    if (self->frame)
-       screen_update_areas();
+    if (!STRUT_EQUAL(strut, self->strut)) {
+        self->strut = strut;
+
+        /* updating here is pointless while we're being mapped cuz we're not in
+           the client list yet */
+        if (self->frame)
+            screen_update_areas();
+    }
 }
 
 void client_update_icons(ObClient *self)
@@ -1682,7 +1728,7 @@ static void client_apply_startup_state(ObClient *self)
        client_shade(self, TRUE);
     }
     if (self->urgent)
-        dispatch_client(Event_Client_Urgent, self, self->urgent, 0);
+        client_urgent_notify(self);
   
     if (self->max_vert && self->max_horz) {
        self->max_vert = self->max_horz = FALSE;
@@ -1710,6 +1756,13 @@ void client_configure_full(ObClient *self, ObCorner anchor,
                            gboolean force_reply)
 {
     gboolean moved = FALSE, resized = FALSE;
+    guint fdecor = self->frame->decorations;
+    gboolean fhorz = self->frame->max_horz;
+
+    /* make the frame recalculate its dimentions n shit without changing
+       anything visible for real, this way the constraints below can work with
+       the updated frame dimensions. */
+    frame_adjust_area(self->frame, TRUE, TRUE, TRUE);
 
     /* gets the frame's position */
     frame_client_gravity(self->frame, &x, &y);
@@ -1756,8 +1809,8 @@ void client_configure_full(ObClient *self, ObCorner anchor,
 
         /* set the size and position if maximized */
         if (self->max_horz) {
-            x = a->x - self->frame->size.left;
-            w = a->width;
+            x = a->x;
+            w = a->width - self->frame->size.left - self->frame->size.right;
         }
         if (self->max_vert) {
             y = a->y;
@@ -1800,33 +1853,14 @@ void client_configure_full(ObClient *self, ObCorner anchor,
             minh = self->base_size.height;
         }
 
-        if (user) {
-            /* for interactive resizing. have to move half an increment in each
-               direction. */
-
-            /* how far we are towards the next size inc */
-            int mw = (w - basew) % self->size_inc.width; 
-            int mh = (h - baseh) % self->size_inc.height;
-            /* amount to add */
-            int aw = self->size_inc.width / 2;
-            int ah = self->size_inc.height / 2;
-            /* don't let us move into a new size increment */
-            if (mw + aw >= self->size_inc.width)
-                aw = self->size_inc.width - mw - 1;
-            if (mh + ah >= self->size_inc.height)
-                ah = self->size_inc.height - mh - 1;
-            w += aw;
-            h += ah;
-    
-            /* if this is a user-requested resize, then check against min/max
-               sizes */
-
-            /* smaller than min size or bigger than max size? */
-            if (w > self->max_size.width) w = self->max_size.width;
-            if (w < minw) w = minw;
-            if (h > self->max_size.height) h = self->max_size.height;
-            if (h < minh) h = minh;
-        }
+        /* if this is a user-requested resize, then check against min/max
+           sizes */
+
+        /* smaller than min size or bigger than max size? */
+        if (w > self->max_size.width) w = self->max_size.width;
+        if (w < minw) w = minw;
+        if (h > self->max_size.height) h = self->max_size.height;
+        if (h < minh) h = minh;
 
         w -= basew;
         h -= baseh;
@@ -1850,20 +1884,18 @@ void client_configure_full(ObClient *self, ObCorner anchor,
         w += basew;
         h += baseh;
 
-        if (user) {
-            /* adjust the height to match the width for the aspect ratios.
-             for this, min size is not substituted for base size ever. */
-            w -= self->base_size.width;
-            h -= self->base_size.height;
+        /* adjust the height to match the width for the aspect ratios.
+           for this, min size is not substituted for base size ever. */
+        w -= self->base_size.width;
+        h -= self->base_size.height;
 
-            if (self->min_ratio)
-                if (h * self->min_ratio > w) h = (int)(w / self->min_ratio);
-            if (self->max_ratio)
-                if (h * self->max_ratio < w) h = (int)(w / self->max_ratio);
+        if (self->min_ratio)
+            if (h * self->min_ratio > w) h = (int)(w / self->min_ratio);
+        if (self->max_ratio)
+            if (h * self->max_ratio < w) h = (int)(w / self->max_ratio);
 
-            w += self->base_size.width;
-            h += self->base_size.height;
-        }
+        w += self->base_size.width;
+        h += self->base_size.height;
     }
 
     switch (anchor) {
@@ -1895,11 +1927,11 @@ void client_configure_full(ObClient *self, ObCorner anchor,
 
     /* move/resize the frame to match the request */
     if (self->frame) {
-        if (self->decorations != self->frame->decorations)
+        if (self->decorations != fdecor || self->max_horz != fhorz)
             moved = resized = TRUE;
 
         if (moved || resized)
-            frame_adjust_area(self->frame, moved, resized);
+            frame_adjust_area(self->frame, moved, resized, FALSE);
 
         if (!resized && (force_reply || ((!user && moved) || (user && final))))
         {
@@ -1977,7 +2009,7 @@ void client_fullscreen(ObClient *self, gboolean fs, gboolean savearea)
 
     client_setup_decor_and_functions(self);
 
-    client_configure(self, OB_CORNER_TOPLEFT, x, y, w, h, TRUE, TRUE);
+    client_move_resize(self, x, y, w, h);
 
     /* try focus us when we go into fullscreen mode */
     client_focus(self);
@@ -2035,9 +2067,6 @@ static void client_iconify_recursive(ObClient *self,
         client_change_state(self);
         client_showhide(self);
         screen_update_areas();
-
-        dispatch_client(iconic ? Event_Client_Unmapped : Event_Client_Mapped,
-                        self, 0, 0);
     }
 
     /* iconify all transients */
@@ -2152,9 +2181,11 @@ void client_maximize(ObClient *self, gboolean max, int dir, gboolean savearea)
 
     client_change_state(self); /* change the state hints on the client */
 
+    client_setup_decor_and_functions(self);
+
     /* figure out where the client should be going */
     frame_frame_gravity(self->frame, &x, &y);
-    client_configure(self, OB_CORNER_TOPLEFT, x, y, w, h, TRUE, TRUE);
+    client_move_resize(self, x, y, w, h);
 }
 
 void client_shade(ObClient *self, gboolean shade)
@@ -2169,7 +2200,7 @@ void client_shade(ObClient *self, gboolean shade)
     self->shaded = shade;
     client_change_state(self);
     /* resize the frame to just the titlebar */
-    frame_adjust_area(self->frame, FALSE, FALSE);
+    frame_adjust_area(self->frame, FALSE, FALSE, FALSE);
 }
 
 void client_close(ObClient *self)
@@ -2237,8 +2268,6 @@ void client_set_desktop_recursive(ObClient *self,
             focus_order_to_top(self);
         else
             focus_order_to_bottom(self);
-
-        dispatch_client(Event_Client_Desktop, self, target, old);
     }
 
     /* move all transients */
@@ -2523,16 +2552,19 @@ void client_unfocus(ObClient *self)
     focus_fallback(OB_FOCUS_FALLBACK_UNFOCUSING);
 }
 
-void client_activate(ObClient *self)
+void client_activate(ObClient *self, gboolean here)
 {
     if (client_normal(self) && screen_showing_desktop)
         screen_show_desktop(FALSE);
     if (self->iconic)
         client_iconify(self, FALSE, FALSE);
     if (self->desktop != DESKTOP_ALL &&
-        self->desktop != screen_desktop)
-        screen_set_desktop(self->desktop);
-    else if (!self->frame->visible)
+        self->desktop != screen_desktop) {
+        if (here)
+            client_set_desktop(self, screen_desktop, FALSE);
+        else
+            screen_set_desktop(self->desktop);
+    } else if (!self->frame->visible)
         /* if its not visible for other reasons, then don't mess
            with it */
         return;
@@ -2615,7 +2647,8 @@ ObClient *client_find_directional(ObClient *c, ObDirection dir)
         his_cy = (cur->frame->area.y - my_cy)
             + cur->frame->area.height / 2;
 
-        if(dir > 3) { 
+        if(dir == OB_DIRECTION_NORTHEAST || dir == OB_DIRECTION_SOUTHEAST ||
+           dir == OB_DIRECTION_SOUTHWEST || dir == OB_DIRECTION_NORTHWEST) {
             int tx;
             /* Rotate the diagonals 45 degrees counterclockwise.
              * To do this, multiply the matrix /+h +h\ with the
@@ -2743,3 +2776,194 @@ gchar* client_get_sm_client_id(ObClient *self)
         PROP_GETS(self->group->leader, sm_client_id, locale, &id);
     return id;
 }
+
+/* finds the nearest edge in the given direction from the current client
+ * note to self: the edge is the -frame- edge (the actual one), not the
+ * client edge.
+ */
+int client_directional_edge_search(ObClient *c, ObDirection dir)
+{
+    int dest;
+    int my_edge_start, my_edge_end, my_offset;
+    GList *it;
+    Rect *a;
+    
+    if(!client_list)
+        return -1;
+
+    a = screen_area(c->desktop);
+
+    switch(dir) {
+    case OB_DIRECTION_NORTH:
+        my_edge_start = c->frame->area.x;
+        my_edge_end = c->frame->area.x + c->frame->area.width;
+        my_offset = c->frame->area.y;
+        
+        dest = a->y; /* default: top of screen */
+
+        for(it = g_list_first(client_list); it; it = it->next) {
+            int his_edge_start, his_edge_end, his_offset;
+            ObClient *cur = it->data;
+
+            if(cur == c)
+                continue;
+            if(!client_normal(cur))
+                continue;
+            if(c->desktop != cur->desktop && cur->desktop != DESKTOP_ALL)
+                continue;
+            if(cur->iconic)
+                continue;
+
+            his_edge_start = cur->frame->area.x;
+            his_edge_end = cur->frame->area.x + cur->frame->area.width;
+            his_offset = cur->frame->area.y + cur->frame->area.height;
+
+            if(his_offset + 1 > my_offset)
+                continue;
+
+            if(his_offset < dest)
+                continue;
+            
+            if(his_edge_start >= my_edge_start &&
+               his_edge_start <= my_edge_end)
+                dest = his_offset;
+
+            if(my_edge_start >= his_edge_start &&
+               my_edge_start <= his_edge_end)
+                dest = his_offset;
+
+        }
+        break;
+    case OB_DIRECTION_SOUTH:
+        my_edge_start = c->frame->area.x;
+        my_edge_end = c->frame->area.x + c->frame->area.width;
+        my_offset = c->frame->area.y + c->frame->area.height;
+        
+        dest = a->y + a->height; /* default: bottom of screen */
+
+        for(it = g_list_first(client_list); it; it = it->next) {
+            int his_edge_start, his_edge_end, his_offset;
+            ObClient *cur = it->data;
+
+            if(cur == c)
+                continue;
+            if(!client_normal(cur))
+                continue;
+            if(c->desktop != cur->desktop && cur->desktop != DESKTOP_ALL)
+                continue;
+            if(cur->iconic)
+                continue;
+
+            his_edge_start = cur->frame->area.x;
+            his_edge_end = cur->frame->area.x + cur->frame->area.width;
+            his_offset = cur->frame->area.y;
+
+
+            if(his_offset - 1 < my_offset)
+                continue;
+            
+            if(his_offset > dest)
+                continue;
+            
+            if(his_edge_start >= my_edge_start &&
+               his_edge_start <= my_edge_end)
+                dest = his_offset;
+
+            if(my_edge_start >= his_edge_start &&
+               my_edge_start <= his_edge_end)
+                dest = his_offset;
+
+        }
+        break;
+    case OB_DIRECTION_WEST:
+        my_edge_start = c->frame->area.y;
+        my_edge_end = c->frame->area.y + c->frame->area.height;
+        my_offset = c->frame->area.x;
+
+        dest = a->x; /* default: leftmost egde of screen */
+
+        for(it = g_list_first(client_list); it; it = it->next) {
+            int his_edge_start, his_edge_end, his_offset;
+            ObClient *cur = it->data;
+
+            if(cur == c)
+                continue;
+            if(!client_normal(cur))
+                continue;
+            if(c->desktop != cur->desktop && cur->desktop != DESKTOP_ALL)
+                continue;
+            if(cur->iconic)
+                continue;
+
+            his_edge_start = cur->frame->area.y;
+            his_edge_end = cur->frame->area.y + cur->frame->area.height;
+            his_offset = cur->frame->area.x + cur->frame->area.width;
+
+            if(his_offset + 1 > my_offset)
+                continue;
+            
+            if(his_offset < dest)
+                continue;
+            
+            if(his_edge_start >= my_edge_start &&
+               his_edge_start <= my_edge_end)
+                dest = his_offset;
+
+            if(my_edge_start >= his_edge_start &&
+               my_edge_start <= his_edge_end)
+                dest = his_offset;
+                
+
+        }
+        break;
+    case OB_DIRECTION_EAST:
+        my_edge_start = c->frame->area.y;
+        my_edge_end = c->frame->area.y + c->frame->area.height;
+        my_offset = c->frame->area.x + c->frame->area.width;
+        
+        dest = a->x + a->width; /* default: rightmost edge of screen */
+
+        for(it = g_list_first(client_list); it; it = it->next) {
+            int his_edge_start, his_edge_end, his_offset;
+            ObClient *cur = it->data;
+
+            if(cur == c)
+                continue;
+            if(!client_normal(cur))
+                continue;
+            if(c->desktop != cur->desktop && cur->desktop != DESKTOP_ALL)
+                continue;
+            if(cur->iconic)
+                continue;
+
+            his_edge_start = cur->frame->area.y;
+            his_edge_end = cur->frame->area.y + cur->frame->area.height;
+            his_offset = cur->frame->area.x;
+
+            if(his_offset - 1 < my_offset)
+                continue;
+            
+            if(his_offset > dest)
+                continue;
+            
+            if(his_edge_start >= my_edge_start &&
+               his_edge_start <= my_edge_end)
+                dest = his_offset;
+
+            if(my_edge_start >= his_edge_start &&
+               my_edge_start <= his_edge_end)
+                dest = his_offset;
+
+        }
+        break;
+    case OB_DIRECTION_NORTHEAST:
+    case OB_DIRECTION_SOUTHEAST:
+    case OB_DIRECTION_NORTHWEST:
+    case OB_DIRECTION_SOUTHWEST:
+        /* not implemented */
+        break;
+    default:
+            g_assert_not_reached();
+    }
+    return dest;
+}
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