]> Dogcows Code - chaz/openbox/blobdiff - openbox/client.c
change the menu plugin interface, no need for the create/destroy functions any more.
[chaz/openbox] / openbox / client.c
index af445e746941e1c99c9af3655dbc92398c7dd676..f17e9724fc228afa338b83c6604d875c4f339acb 100644 (file)
@@ -8,6 +8,7 @@
 #include "prop.h"
 #include "extensions.h"
 #include "frame.h"
+#include "session.h"
 #include "event.h"
 #include "grab.h"
 #include "focus.h"
@@ -16,7 +17,9 @@
 #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>
@@ -43,6 +46,8 @@ static void client_showhide(ObClient *self);
 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);
 
 void client_startup()
 {
@@ -228,10 +233,14 @@ 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;
+
     client_get_all(self);
+    client_restore_session_state(self);
+
+    client_change_state(self);
 
     /* remove the client's border (and adjust re gravity) */
     client_toggle_border(self, FALSE);
@@ -253,6 +262,7 @@ void client_manage(Window window)
     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 &&
@@ -262,6 +272,8 @@ 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;
@@ -291,14 +303,14 @@ void client_manage(Window window)
                 activate = TRUE;
             }
         }
+#endif
     }
 
     dispatch_client(Event_Client_New, self, 0, 0);
 
     /* make sure the window is visible */
-    client_move_onscreen(self, TRUE);
-
-    screen_update_areas();
+    if (ob_state() == OB_STATE_RUNNING)
+        client_move_onscreen(self, client_normal(self));
 
     client_showhide(self);
 
@@ -314,14 +326,20 @@ void client_manage(Window window)
     if (screen_showing_desktop)
         screen_show_desktop(FALSE);
 
+    /* add to client list/map */
+    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);
 
-    /* add to client list/map */
-    client_list = g_list_append(client_list, self);
-    g_hash_table_insert(window_map, &self->window, self);
+    dispatch_client(Event_Client_Mapped, self, 0, 0);
 
     ob_debug("Managed window 0x%lx (%s)\n", window, self->class);
 }
@@ -332,13 +350,6 @@ 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;
@@ -349,6 +360,9 @@ void client_unmanage(ObClient *self)
     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);
 
@@ -392,9 +406,9 @@ 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);
-
+    /* menus can be associated with a client, so close any that are since
+       we are disappearing now */
+    menu_frame_hide_all_client(self);
     
     if (focus_client == self) {
         XEvent e;
@@ -455,12 +469,66 @@ void client_unmanage(ObClient *self)
     client_set_list();
 }
 
+static void client_restore_session_state(ObClient *self)
+{
+    GList *it;
+
+    if (!(it = session_state_find(self)))
+        return;
+
+    self->session = it->data;
+
+    RECT_SET(self->area, self->session->x, self->session->y,
+             self->session->w, self->session->h);
+    self->positioned = TRUE;
+    XResizeWindow(ob_display, self->window,
+                  self->session->w, self->session->h);
+
+    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 = 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;
+
+    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)
 {
     int x = self->area.x;
     int y = self->area.y;
     if (client_find_onscreen(self, &x, &y,
-                             self->area.width, self->area.height, rude)) {
+                             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);
@@ -580,25 +648,11 @@ 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);
@@ -624,8 +678,6 @@ static void client_get_all(ObClient *self)
     client_update_class(self);
     client_update_strut(self);
     client_update_icons(self);
-
-    client_change_state(self);
 }
 
 static void client_get_area(ObClient *self)
@@ -671,7 +723,6 @@ static void client_get_desktop(ObClient *self)
        if (!trdesk)
            /* defaults to the current desktop */
            self->desktop = screen_desktop;
-
     }
     if (self->desktop != d) {
         /* set the desktop hint, to make sure that it always exists */
@@ -1062,10 +1113,14 @@ 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))
@@ -1082,13 +1137,8 @@ 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 &&
@@ -1211,9 +1261,6 @@ void client_update_wmhints(ObClient *self)
                 }
             }
 
-            /* the WM_HINTS can contain an icon */
-            client_update_icons(self);
-
             /* because the self->transient flag wont change from this call,
                we don't need to update the window's type and such, only its
                transient_for, and the transients lists of other windows in
@@ -1221,6 +1268,9 @@ void client_update_wmhints(ObClient *self)
             client_update_transient_for(self);
         }
 
+        /* the WM_HINTS can contain an icon */
+        client_update_icons(self);
+
        XFree(hints);
     }
 
@@ -1343,21 +1393,44 @@ 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(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]);
+        }
+        g_free(data);
+    }
 
-    if (!PROP_GETA32(self->window, net_wm_strut, cardinal, &data, &num)) {
-       STRUT_SET(self->strut, 0, 0, 0, 0);
-    } else {
-        if (num == 4)
-            STRUT_SET(self->strut, data[0], data[2], data[1], data[3]);
-        else
-            STRUT_SET(self->strut, 0, 0, 0, 0);
-       g_free(data);
+    if (!got &&
+        PROP_GETA32(self->window, net_wm_strut, cardinal, &data, &num)) {
+        if (num == 4) {
+            got = TRUE;
+            STRUT_PARTIAL_SET(strut,
+                              data[0], data[2], data[1], data[3],
+                              0, 0, 0, 0, 0, 0, 0, 0);
+        }
+        g_free(data);
     }
 
-    /* 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 (!got)
+        STRUT_PARTIAL_SET(strut, 0, 0, 0, 0,
+                          0, 0, 0, 0, 0, 0, 0, 0);
+
+    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)
@@ -1660,6 +1733,13 @@ 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);
@@ -1706,8 +1786,8 @@ 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;
@@ -1732,6 +1812,7 @@ void client_configure_full(ObClient *self, ObCorner anchor,
 
     if (!(w == self->area.width && h == self->area.height)) {
         int basew, baseh, minw, minh;
+        int mw, mh, aw, ah;
 
         /* base size is substituted with min size if not specified */
         if (self->base_size.width || self->base_size.height) {
@@ -1750,33 +1831,31 @@ 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;
+        /* for interactive resizing. have to move half an increment in each
+           direction. */
+
+        /* how far we are towards the next size inc */
+        mw = (w - basew) % self->size_inc.width; 
+        mh = (h - baseh) % self->size_inc.height;
+        /* amount to add */
+        aw = self->size_inc.width / 2;
+        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;
@@ -1791,8 +1870,8 @@ void client_configure_full(ObClient *self, ObCorner anchor,
   
         /* store the logical size */
         SIZE_SET(self->logical_size,
-                 self->size_inc.width ? w : w + basew,
-                 self->size_inc.height ? h : h + baseh);
+                 self->size_inc.width > 1 ? w : w + basew,
+                 self->size_inc.height > 1 ? h : h + baseh);
 
         w *= self->size_inc.width;
         h *= self->size_inc.height;
@@ -1800,20 +1879,18 @@ 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) {
@@ -1838,18 +1915,18 @@ void client_configure_full(ObClient *self, ObCorner anchor,
 
     /* for app-requested resizes, always resize if 'resized' is true.
        for user-requested ones, only resize if final is true, or when
-       resizing in opaque mode */
+       resizing in redraw mode */
     if ((!user && resized) ||
-        (user && (final || (resized && config_opaque_resize))))
+        (user && (final || (resized && config_redraw_resize))))
        XResizeWindow(ob_display, self->window, w, h);
 
     /* 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))))
         {
@@ -1864,11 +1941,6 @@ void client_configure_full(ObClient *self, ObCorner anchor,
                 self->border_width;
             event.xconfigure.y = self->frame->area.y + self->frame->size.top -
                 self->border_width;
-            g_message("x %d cx %d y %d cy %d",
-                      self->area.x, 
-                      event.xconfigure.x,
-                      self->area.y,
-                      event.xconfigure.y);
             event.xconfigure.width = w;
             event.xconfigure.height = h;
             event.xconfigure.border_width = 0;
@@ -2107,6 +2179,8 @@ 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);
@@ -2124,7 +2198,7 @@ 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)
@@ -2478,16 +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;
@@ -2570,7 +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
@@ -2689,3 +2767,203 @@ ObClient *client_search_transient(ObClient *self, ObClient *search)
     }
     return NULL;
 }
+
+gchar* client_get_sm_client_id(ObClient *self)
+{
+    gchar *id = NULL;
+
+    if (!PROP_GETS(self->window, sm_client_id, locale, &id) && self->group)
+        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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