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mutter/src/screen.c
Anders Carlsson d466c615ed Take Xinerama screen edges into consideration. 
2002-05-25  Anders Carlsson  <andersca@gnu.org>

	* src/place.c: (get_vertical_edges), (get_horizontal_edges):
	Take Xinerama screen edges into consideration.

	* src/screen.c: (meta_rectangle_intersect),
	(meta_screen_get_xinerama_for_window):
	* src/screen.h:
	Add a new function that returns the xinerama monitor that
	a window is on.
2002-05-25 16:30:14 +00:00

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/* Metacity X screen handler */
/*
* Copyright (C) 2001 Havoc Pennington
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*/
#include <config.h>
#include "screen.h"
#include "util.h"
#include "errors.h"
#include "window.h"
#include "frame.h"
#include "prefs.h"
#include "workspace.h"
#include "keybindings.h"
#include "stack.h"
#include "xprops.h"
#ifdef HAVE_XINERAMA
#include <X11/extensions/Xinerama.h>
#endif
#include <X11/Xatom.h>
#include <locale.h>
#include <string.h>
static char* get_screen_name (MetaDisplay *display,
int number);
static void update_num_workspaces (MetaScreen *screen);
static void update_focus_mode (MetaScreen *screen);
static void prefs_changed_callback (MetaPreference pref,
gpointer data);
static int
set_wm_check_hint (MetaScreen *screen)
{
unsigned long data[1];
g_return_val_if_fail (screen->display->leader_window != None, 0);
data[0] = screen->display->leader_window;
XChangeProperty (screen->display->xdisplay, screen->xroot,
screen->display->atom_net_supporting_wm_check,
XA_WINDOW,
32, PropModeReplace, (guchar*) data, 1);
/* Legacy GNOME hint (uses cardinal, dunno why) */
/* legacy hint window should have property containing self */
XChangeProperty (screen->display->xdisplay, screen->display->leader_window,
screen->display->atom_win_supporting_wm_check,
XA_CARDINAL,
32, PropModeReplace, (guchar*) data, 1);
/* do this after setting up window fully, to avoid races
* with clients listening to property notify on root.
*/
XChangeProperty (screen->display->xdisplay, screen->xroot,
screen->display->atom_win_supporting_wm_check,
XA_CARDINAL,
32, PropModeReplace, (guchar*) data, 1);
return Success;
}
static int
set_supported_hint (MetaScreen *screen)
{
#define N_SUPPORTED 32
#define N_WIN_SUPPORTED 1
Atom atoms[N_SUPPORTED];
atoms[0] = screen->display->atom_net_wm_name;
atoms[1] = screen->display->atom_net_close_window;
atoms[2] = screen->display->atom_net_wm_state;
atoms[3] = screen->display->atom_net_wm_state_shaded;
atoms[4] = screen->display->atom_net_wm_state_maximized_vert;
atoms[5] = screen->display->atom_net_wm_state_maximized_horz;
atoms[6] = screen->display->atom_net_wm_desktop;
atoms[7] = screen->display->atom_net_number_of_desktops;
atoms[8] = screen->display->atom_net_current_desktop;
atoms[9] = screen->display->atom_net_wm_window_type;
atoms[10] = screen->display->atom_net_wm_window_type_desktop;
atoms[11] = screen->display->atom_net_wm_window_type_dock;
atoms[12] = screen->display->atom_net_wm_window_type_toolbar;
atoms[13] = screen->display->atom_net_wm_window_type_menu;
atoms[14] = screen->display->atom_net_wm_window_type_dialog;
atoms[15] = screen->display->atom_net_wm_window_type_normal;
atoms[16] = screen->display->atom_net_wm_state_modal;
atoms[17] = screen->display->atom_net_client_list;
atoms[18] = screen->display->atom_net_client_list_stacking;
atoms[19] = screen->display->atom_net_wm_state_skip_taskbar;
atoms[20] = screen->display->atom_net_wm_state_skip_pager;
atoms[21] = screen->display->atom_net_wm_icon;
atoms[22] = screen->display->atom_net_wm_moveresize;
atoms[23] = screen->display->atom_net_wm_state_hidden;
atoms[24] = screen->display->atom_net_wm_window_type_utility;
atoms[25] = screen->display->atom_net_wm_window_type_splashscreen;
atoms[26] = screen->display->atom_net_wm_state_fullscreen;
atoms[27] = screen->display->atom_net_wm_ping;
atoms[28] = screen->display->atom_net_active_window;
atoms[29] = screen->display->atom_net_wm_workarea;
atoms[30] = screen->display->atom_net_show_desktop;
atoms[31] = screen->display->atom_net_desktop_layout;
XChangeProperty (screen->display->xdisplay, screen->xroot,
screen->display->atom_net_supported,
XA_ATOM,
32, PropModeReplace, (guchar*) atoms, N_SUPPORTED);
/* Set legacy GNOME hints */
atoms[0] = screen->display->atom_win_layer;
XChangeProperty (screen->display->xdisplay, screen->xroot,
screen->display->atom_win_protocols,
XA_ATOM,
32, PropModeReplace, (guchar*) atoms, N_WIN_SUPPORTED);
return Success;
#undef N_SUPPORTED
}
static int
set_wm_icon_size_hint (MetaScreen *screen)
{
#define N_VALS 6
gulong vals[N_VALS];
/* min width, min height, max w, max h, width inc, height inc */
vals[0] = META_ICON_WIDTH;
vals[1] = META_ICON_HEIGHT;
vals[2] = META_ICON_WIDTH;
vals[3] = META_ICON_HEIGHT;
vals[4] = 0;
vals[5] = 0;
XChangeProperty (screen->display->xdisplay, screen->xroot,
screen->display->atom_wm_icon_size,
XA_CARDINAL,
32, PropModeReplace, (guchar*) vals, N_VALS);
return Success;
#undef N_VALS
}
MetaScreen*
meta_screen_new (MetaDisplay *display,
int number)
{
MetaScreen *screen;
Window xroot;
Display *xdisplay;
XWindowAttributes attr;
int xinerama_event_base, xinerama_error_base;
/* Only display->name, display->xdisplay, and display->error_traps
* can really be used in this function, since normally screens are
* created from the MetaDisplay constructor
*/
xdisplay = display->xdisplay;
meta_verbose ("Trying screen %d on display '%s'\n",
number, display->name);
xroot = RootWindow (xdisplay, number);
/* FVWM checks for None here, I don't know if this
* ever actually happens
*/
if (xroot == None)
{
meta_warning (_("Screen %d on display '%s' is invalid\n"),
number, display->name);
return NULL;
}
/* Select our root window events */
meta_error_trap_push (display);
/* We need to or with the existing event mask since
* gtk+ may be interested in other events.
*/
XGetWindowAttributes (xdisplay, xroot, &attr);
XSelectInput (xdisplay,
xroot,
SubstructureRedirectMask | SubstructureNotifyMask |
ColormapChangeMask | PropertyChangeMask |
LeaveWindowMask | EnterWindowMask |
ButtonPressMask | ButtonReleaseMask |
FocusChangeMask | attr.your_event_mask);
if (meta_error_trap_pop (display) != Success)
{
meta_warning (_("Screen %d on display '%s' already has a window manager\n"),
number, display->name);
return NULL;
}
screen = g_new (MetaScreen, 1);
screen->display = display;
screen->number = number;
screen->screen_name = get_screen_name (display, number);
screen->xscreen = ScreenOfDisplay (xdisplay, number);
screen->xroot = xroot;
screen->width = WidthOfScreen (screen->xscreen);
screen->height = HeightOfScreen (screen->xscreen);
screen->current_cursor = -1; /* invalid/unset */
screen->default_xvisual = DefaultVisualOfScreen (screen->xscreen);
screen->default_depth = DefaultDepthOfScreen (screen->xscreen);
screen->work_area_idle = 0;
screen->rows_of_workspaces = 1;
screen->columns_of_workspaces = -1;
screen->vertical_workspaces = FALSE;
screen->xinerama_infos = NULL;
screen->n_xinerama_infos = 0;
#ifdef HAVE_XINERAMA
if (XineramaQueryExtension (display->xdisplay,
&xinerama_event_base,
&xinerama_error_base))
{
XineramaScreenInfo *infos;
int n_infos;
int i;
n_infos = 0;
infos = XineramaQueryScreens (display->xdisplay, &n_infos);
meta_topic (META_DEBUG_XINERAMA,
"Found %d Xinerama screens on display %s\n",
n_infos, display->name);
if (n_infos > 0)
{
screen->xinerama_infos = g_new (MetaXineramaScreenInfo, n_infos);
screen->n_xinerama_infos = n_infos;
i = 0;
while (i < n_infos)
{
screen->xinerama_infos[i].number = infos[i].screen_number;
screen->xinerama_infos[i].x_origin = infos[i].x_org;
screen->xinerama_infos[i].y_origin = infos[i].y_org;
screen->xinerama_infos[i].width = infos[i].width;
screen->xinerama_infos[i].height = infos[i].height;
++i;
}
}
meta_XFree (infos);
}
else
{
meta_topic (META_DEBUG_XINERAMA,
"No Xinerama extension on display %s\n",
display->name);
}
#else
meta_topic (META_DEBUG_XINERAMA,
"Metacity compiled without Xinerama support\n");
#endif
/* If no Xinerama, fill in the single screen info so
* we can use the field unconditionally
*/
if (screen->n_xinerama_infos == 0)
{
meta_topic (META_DEBUG_XINERAMA,
"No Xinerama screens, using default screen info\n");
screen->xinerama_infos = g_new (MetaXineramaScreenInfo, 1);
screen->n_xinerama_infos = 1;
screen->xinerama_infos[0].number = 0;
screen->xinerama_infos[0].x_origin = 0;
screen->xinerama_infos[0].y_origin = 0;
screen->xinerama_infos[0].width = screen->width;
screen->xinerama_infos[0].height = screen->height;
}
g_assert (screen->n_xinerama_infos > 0);
g_assert (screen->xinerama_infos != NULL);
meta_screen_set_cursor (screen, META_CURSOR_DEFAULT);
if (display->leader_window == None)
display->leader_window = XCreateSimpleWindow (display->xdisplay,
screen->xroot,
-100, -100, 1, 1, 0, 0, 0);
if (display->no_focus_window == None)
{
display->no_focus_window = XCreateSimpleWindow (display->xdisplay,
screen->xroot,
-100, -100, 1, 1, 0, 0, 0);
XSelectInput (display->xdisplay, display->no_focus_window,
FocusChangeMask);
XMapWindow (display->xdisplay, display->no_focus_window);
}
set_wm_icon_size_hint (screen);
set_supported_hint (screen);
set_wm_check_hint (screen);
meta_screen_update_workspace_layout (screen);
/* Screens must have at least one workspace at all times,
* so create that required workspace.
*/
screen->active_workspace = meta_workspace_new (screen);
update_num_workspaces (screen);
screen->keys_grabbed = FALSE;
meta_screen_grab_keys (screen);
screen->ui = meta_ui_new (screen->display->xdisplay,
screen->xscreen);
screen->tab_popup = NULL;
screen->stack = meta_stack_new (screen);
meta_prefs_add_listener (prefs_changed_callback, screen);
meta_verbose ("Added screen %d ('%s') root 0x%lx\n",
screen->number, screen->screen_name, screen->xroot);
return screen;
}
void
meta_screen_free (MetaScreen *screen)
{
meta_prefs_remove_listener (prefs_changed_callback, screen);
meta_screen_ungrab_keys (screen);
meta_ui_free (screen->ui);
meta_stack_free (screen->stack);
meta_error_trap_push (screen->display);
XSelectInput (screen->display->xdisplay, screen->xroot, 0);
if (meta_error_trap_pop (screen->display) != Success)
meta_warning (_("Could not release screen %d on display '%s'\n"),
screen->number, screen->display->name);
if (screen->work_area_idle != 0)
g_source_remove (screen->work_area_idle);
g_free (screen->screen_name);
g_free (screen);
}
void
meta_screen_manage_all_windows (MetaScreen *screen)
{
Window ignored1, ignored2;
Window *children;
int n_children;
int i;
/* Must grab server to avoid obvious race condition */
meta_display_grab (screen->display);
meta_error_trap_push (screen->display);
XQueryTree (screen->display->xdisplay,
screen->xroot,
&ignored1, &ignored2, &children, &n_children);
if (meta_error_trap_pop (screen->display))
{
meta_display_ungrab (screen->display);
return;
}
meta_stack_freeze (screen->stack);
i = 0;
while (i < n_children)
{
meta_window_new (screen->display, children[i], TRUE);
++i;
}
meta_stack_thaw (screen->stack);
meta_display_ungrab (screen->display);
if (children)
XFree (children);
}
MetaScreen*
meta_screen_for_x_screen (Screen *xscreen)
{
MetaDisplay *display;
display = meta_display_for_x_display (DisplayOfScreen (xscreen));
if (display == NULL)
return NULL;
return meta_display_screen_for_x_screen (display, xscreen);
}
static void
prefs_changed_callback (MetaPreference pref,
gpointer data)
{
MetaScreen *screen = data;
if (pref == META_PREF_NUM_WORKSPACES)
{
update_num_workspaces (screen);
}
else if (pref == META_PREF_FOCUS_MODE)
{
update_focus_mode (screen);
}
}
static char*
get_screen_name (MetaDisplay *display,
int number)
{
char *p;
char *dname;
char *scr;
/* DisplayString gives us a sort of canonical display,
* vs. the user-entered name from XDisplayName()
*/
dname = g_strdup (DisplayString (display->xdisplay));
/* Change display name to specify this screen.
*/
p = strrchr (dname, ':');
if (p)
{
p = strchr (p, '.');
if (p)
*p = '\0';
}
scr = g_strdup_printf ("%s.%d", dname, number);
g_free (dname);
return scr;
}
static gint
ptrcmp (gconstpointer a, gconstpointer b)
{
if (a < b)
return -1;
else if (a > b)
return 1;
else
return 0;
}
static void
listify_func (gpointer key, gpointer value, gpointer data)
{
GSList **listp;
listp = data;
*listp = g_slist_prepend (*listp, value);
}
void
meta_screen_foreach_window (MetaScreen *screen,
MetaScreenWindowFunc func,
gpointer data)
{
GSList *winlist;
GSList *tmp;
/* If we end up doing this often, just keeping a list
* of windows might be sensible.
*/
winlist = NULL;
g_hash_table_foreach (screen->display->window_ids,
listify_func,
&winlist);
winlist = g_slist_sort (winlist, ptrcmp);
tmp = winlist;
while (tmp != NULL)
{
/* If the next node doesn't contain this window
* a second time, delete the window.
*/
if (tmp->next == NULL ||
(tmp->next && tmp->next->data != tmp->data))
{
MetaWindow *window = tmp->data;
if (window->screen == screen)
(* func) (screen, window, data);
}
tmp = tmp->next;
}
g_slist_free (winlist);
}
static void
queue_draw (MetaScreen *screen, MetaWindow *window, gpointer data)
{
if (window->frame)
meta_frame_queue_draw (window->frame);
}
void
meta_screen_queue_frame_redraws (MetaScreen *screen)
{
meta_screen_foreach_window (screen, queue_draw, NULL);
}
static void
queue_resize (MetaScreen *screen, MetaWindow *window, gpointer data)
{
meta_window_queue_move_resize (window);
}
void
meta_screen_queue_window_resizes (MetaScreen *screen)
{
meta_screen_foreach_window (screen, queue_resize, NULL);
}
int
meta_screen_get_n_workspaces (MetaScreen *screen)
{
GList *tmp;
int i;
i = 0;
tmp = screen->display->workspaces;
while (tmp != NULL)
{
MetaWorkspace *w = tmp->data;
if (w->screen == screen)
++i;
tmp = tmp->next;
}
return i;
}
static void
update_num_workspaces (MetaScreen *screen)
{
int new_num;
GList *tmp;
int i;
GList *extras;
MetaWorkspace *last_remaining;
gboolean need_change_space;
new_num = meta_prefs_get_num_workspaces ();
g_assert (new_num > 0);
last_remaining = NULL;
extras = NULL;
i = 0;
tmp = screen->display->workspaces;
while (tmp != NULL)
{
MetaWorkspace *w = tmp->data;
if (w->screen == screen)
{
++i;
if (i > new_num)
extras = g_list_prepend (extras, w);
else
last_remaining = w;
}
tmp = tmp->next;
}
g_assert (last_remaining);
/* Get rid of the extra workspaces by moving all their windows
* to last_remaining, then activating last_remaining if
* one of the removed workspaces was active. This will be a bit
* wacky if the config tool for changing number of workspaces
* is on a removed workspace ;-)
*/
need_change_space = FALSE;
tmp = extras;
while (tmp != NULL)
{
MetaWorkspace *w = tmp->data;
meta_workspace_relocate_windows (w, last_remaining);
if (w == screen->active_workspace)
need_change_space = TRUE;
tmp = tmp->next;
}
if (need_change_space)
meta_workspace_activate (last_remaining);
/* Should now be safe to free the workspaces */
tmp = extras;
while (tmp != NULL)
{
MetaWorkspace *w = tmp->data;
g_assert (w->windows == NULL);
meta_workspace_free (w);
tmp = tmp->next;
}
g_list_free (extras);
/* Add missing workspaces. FIXME This will keep setting the
* number-of-workspaces root window property on each workspace
* creation, kind of a lame thing
*/
while (i < new_num)
{
meta_workspace_new (screen);
++i;
}
}
static void
update_focus_mode (MetaScreen *screen)
{
/* nothing to do anymore */ ;
}
void
meta_screen_set_cursor (MetaScreen *screen,
MetaCursor cursor)
{
Cursor xcursor;
if (cursor == screen->current_cursor)
return;
screen->current_cursor = cursor;
xcursor = meta_display_create_x_cursor (screen->display, cursor);
XDefineCursor (screen->display->xdisplay, screen->xroot, xcursor);
XFreeCursor (screen->display->xdisplay, xcursor);
}
void
meta_screen_ensure_tab_popup (MetaScreen *screen,
MetaTabList type)
{
MetaTabEntry *entries;
GSList *tab_list;
GSList *tmp;
int len;
int i;
if (screen->tab_popup)
return;
tab_list = meta_display_get_tab_list (screen->display,
type,
screen,
screen->active_workspace);
len = g_slist_length (tab_list);
entries = g_new (MetaTabEntry, len + 1);
entries[len].xwindow = None;
entries[len].title = NULL;
entries[len].icon = NULL;
i = 0;
tmp = tab_list;
while (i < len)
{
MetaWindow *window;
MetaRectangle r;
window = tmp->data;
entries[i].xwindow = window->xwindow;
entries[i].title = window->title;
entries[i].icon = window->icon;
meta_window_get_outer_rect (window, &r);
entries[i].x = r.x;
entries[i].y = r.y;
entries[i].width = r.width;
entries[i].height = r.height;
/* Find inside of highlight rectangle to be used
* when window is outlined for tabbing.
* This should be the size of the east/west frame,
* and the size of the south frame, on those sides.
* on the top it should be the size of the south frame
* edge.
*/
if (window->frame)
{
int south = window->frame->rect.height - window->frame->child_y -
window->rect.height;
int east = window->frame->child_x;
entries[i].inner_x = east;
entries[i].inner_y = south;
entries[i].inner_width = window->rect.width;
entries[i].inner_height = window->frame->rect.height - south * 2;
}
else
{
/* Use an arbitrary border size */
#define OUTLINE_WIDTH 5
entries[i].inner_x = OUTLINE_WIDTH;
entries[i].inner_y = OUTLINE_WIDTH;
entries[i].inner_width = window->rect.width - OUTLINE_WIDTH * 2;
entries[i].inner_height = window->rect.height - OUTLINE_WIDTH * 2;
}
++i;
tmp = tmp->next;
}
screen->tab_popup = meta_ui_tab_popup_new (entries, screen->number);
g_free (entries);
g_slist_free (tab_list);
/* don't show tab popup, since proper window isn't selected yet */
}
/* Focus top window on active workspace */
void
meta_screen_focus_top_window (MetaScreen *screen,
MetaWindow *not_this_one)
{
MetaWindow *window;
if (not_this_one)
meta_topic (META_DEBUG_FOCUS,
"Focusing top window excluding %s\n", not_this_one->desc);
window = meta_stack_get_default_focus_window (screen->stack,
screen->active_workspace,
not_this_one);
/* FIXME I'm a loser on the CurrentTime front */
if (window)
{
meta_topic (META_DEBUG_FOCUS,
"Focusing top window %s\n", window->desc);
meta_window_focus (window, meta_display_get_current_time (screen->display));
}
else
{
meta_topic (META_DEBUG_FOCUS, "No top window to focus found\n");
}
}
static gboolean
meta_rectangle_intersect (MetaRectangle *src1,
MetaRectangle *src2,
MetaRectangle *dest)
{
int dest_x, dest_y;
int dest_w, dest_h;
int return_val;
g_return_val_if_fail (src1 != NULL, FALSE);
g_return_val_if_fail (src2 != NULL, FALSE);
g_return_val_if_fail (dest != NULL, FALSE);
return_val = FALSE;
dest_x = MAX (src1->x, src2->x);
dest_y = MAX (src1->y, src2->y);
dest_w = MIN (src1->x + src1->width, src2->x + src2->width) - dest_x;
dest_h = MIN (src1->y + src1->height, src2->y + src2->height) - dest_y;
if (dest_w > 0 && dest_h > 0)
{
dest->x = dest_x;
dest->y = dest_y;
dest->width = dest_w;
dest->height = dest_h;
return_val = TRUE;
}
else
{
dest->width = 0;
dest->height = 0;
}
return return_val;
}
const MetaXineramaScreenInfo*
meta_screen_get_xinerama_for_window (MetaScreen *screen,
MetaWindow *window)
{
int i;
int best_xinerama, xinerama_score;
best_xinerama = 0;
xinerama_score = 0;
for (i = 0; i < screen->n_xinerama_infos; i++) {
MetaRectangle dest, screen_info;
screen_info.x = screen->xinerama_infos[i].x_origin;
screen_info.y = screen->xinerama_infos[i].y_origin;
screen_info.width = screen->xinerama_infos[i].width;
screen_info.height = screen->xinerama_infos[i].height;
if (meta_rectangle_intersect (&screen_info, &window->rect, &dest))
{
if (dest.width * dest.height > xinerama_score)
{
xinerama_score = dest.width * dest.height;
best_xinerama = i;
}
}
}
return &screen->xinerama_infos[best_xinerama];
}
const MetaXineramaScreenInfo*
meta_screen_get_current_xinerama (MetaScreen *screen)
{
/* FIXME how do we decide which is current? */
return &screen->xinerama_infos[0];
}
#define _NET_WM_ORIENTATION_HORZ 0
#define _NET_WM_ORIENTATION_VERT 1
void
meta_screen_update_workspace_layout (MetaScreen *screen)
{
gulong *list;
int n_items;
list = NULL;
n_items = 0;
if (meta_prop_get_cardinal_list (screen->display,
screen->xroot,
screen->display->atom_net_desktop_layout,
&list, &n_items))
{
if (n_items == 3)
{
int cols, rows;
switch (list[0])
{
case _NET_WM_ORIENTATION_HORZ:
screen->vertical_workspaces = FALSE;
break;
case _NET_WM_ORIENTATION_VERT:
screen->vertical_workspaces = TRUE;
break;
default:
meta_warning ("Someone set a weird orientation in _NET_DESKTOP_LAYOUT\n");
break;
}
rows = list[1];
cols = list[2];
if (rows <= 0 && cols <= 0)
{
meta_warning ("Columns = %d rows = %d in _NET_DESKTOP_LAYOUT makes no sense\n", rows, cols);
}
else
{
if (rows > 0)
screen->rows_of_workspaces = rows;
else
screen->rows_of_workspaces = -1;
if (cols > 0)
screen->columns_of_workspaces = cols;
else
screen->columns_of_workspaces = -1;
}
}
else
{
meta_warning ("Someone set _NET_DESKTOP_LAYOUT to %d integers instead of 3\n",
n_items);
}
meta_XFree (list);
}
meta_verbose ("Workspace layout rows = %d cols = %d orientation = %d\n",
screen->rows_of_workspaces,
screen->columns_of_workspaces,
screen->vertical_workspaces);
}
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