/* Metacity X screen handler */

/* 
 * Copyright (C) 2001 Havoc Pennington
 * Copyright (C) 2003 Rob Adams
 * Copyright (C) 2004, 2005 Elijah Newren
 * 
 * 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.
 */

#ifndef META_SCREEN_H
#define META_SCREEN_H

#include "display.h"
#include <X11/Xutil.h>
#include "ui.h"

typedef struct _MetaXineramaScreenInfo MetaXineramaScreenInfo;

struct _MetaXineramaScreenInfo
{
  int number;
  MetaRectangle rect;
};

typedef void (* MetaScreenWindowFunc) (MetaScreen *screen, MetaWindow *window,
                                       gpointer user_data);

typedef enum
{
  META_SCREEN_TOPLEFT,
  META_SCREEN_TOPRIGHT,
  META_SCREEN_BOTTOMLEFT,
  META_SCREEN_BOTTOMRIGHT
} MetaScreenCorner;

typedef enum
{
  META_SCREEN_UP,
  META_SCREEN_DOWN,
  META_SCREEN_LEFT,
  META_SCREEN_RIGHT
} MetaScreenDirection;

#define META_WIREFRAME_XOR_LINE_WIDTH 2

struct _MetaScreen
{
  MetaDisplay *display;
  int number;
  char *screen_name;
  Screen *xscreen;
  Window xroot;
  int default_depth;
  Visual *default_xvisual;
  MetaRectangle rect;  /* Size of screen; rect.x & rect.y are always 0 */
  MetaUI *ui;
  MetaTabPopup *tab_popup;
  
  MetaWorkspace *active_workspace;

  /* This window holds the focus when we don't want to focus
   * any actual clients
   */
  Window no_focus_window;
  
  GList *workspaces;

  MetaStack *stack;

  MetaCursor current_cursor;

  Window flash_window;

  Window wm_sn_selection_window;
  Atom wm_sn_atom;
  Time wm_sn_timestamp;
  
  MetaXineramaScreenInfo *xinerama_infos;
  int n_xinerama_infos;

  /* Cache the current Xinerama */
  int last_xinerama_index;

#ifdef HAVE_STARTUP_NOTIFICATION
  SnMonitorContext *sn_context;
  GSList *startup_sequences;
  guint startup_sequence_timeout;
#endif
  
  guint work_area_idle;

  int rows_of_workspaces;
  int columns_of_workspaces;
  MetaScreenCorner starting_corner;
  guint vertical_workspaces : 1;
  
  guint keys_grabbed : 1;
  guint all_keys_grabbed : 1;
  
  int closing;

  /* gc for XOR on root window */
  GC root_xor_gc;

  /* Managed by compositor.c; top of stack is first in list */
  GList *compositor_windows;
  XID root_picture;
  XID damage_region;
  XID trans_pixmap;
  XID trans_picture;
};

MetaScreen*   meta_screen_new                 (MetaDisplay                *display,
                                               int                         number,
                                               Time                        timestamp);
void          meta_screen_free                (MetaScreen                 *screen);
void          meta_screen_manage_all_windows  (MetaScreen                 *screen);
MetaScreen*   meta_screen_for_x_screen        (Screen                     *xscreen);
void          meta_screen_foreach_window      (MetaScreen                 *screen,
                                               MetaScreenWindowFunc        func,
                                               gpointer                    data);
void          meta_screen_queue_frame_redraws (MetaScreen                 *screen);
void          meta_screen_queue_window_resizes (MetaScreen                 *screen);

int           meta_screen_get_n_workspaces    (MetaScreen                 *screen);

MetaWorkspace* meta_screen_get_workspace_by_index (MetaScreen    *screen,
                                                   int            index);

void          meta_screen_set_cursor          (MetaScreen                 *screen,
                                               MetaCursor                  cursor);
void          meta_screen_update_cursor       (MetaScreen                 *screen);

void          meta_screen_ensure_tab_popup    (MetaScreen                 *screen,
                                               MetaTabList                 list_type,
                                               MetaTabShowType             show_type);
void          meta_screen_ensure_workspace_popup (MetaScreen *screen);

MetaWindow*   meta_screen_get_mouse_window     (MetaScreen                 *screen,
                                                MetaWindow                 *not_this_one);

const MetaXineramaScreenInfo* meta_screen_get_current_xinerama    (MetaScreen    *screen);
const MetaXineramaScreenInfo* meta_screen_get_xinerama_for_rect   (MetaScreen    *screen,
                                                                   MetaRectangle *rect);
const MetaXineramaScreenInfo* meta_screen_get_xinerama_for_window (MetaScreen    *screen,
                                                                   MetaWindow    *window);


const MetaXineramaScreenInfo* meta_screen_get_xinerama_neighbor (MetaScreen *screen,
                                                                 int         which_xinerama,
                                                                 MetaScreenDirection dir);
void          meta_screen_get_natural_xinerama_list (MetaScreen *screen,
                                                     int**       xineramas_list,
                                                     int*        n_xineramas);

void          meta_screen_update_workspace_layout (MetaScreen             *screen);
void          meta_screen_update_workspace_names  (MetaScreen             *screen);
void          meta_screen_queue_workarea_recalc   (MetaScreen             *screen);

Window meta_create_offscreen_window (Display *xdisplay,
                                     Window   parent);

typedef struct MetaWorkspaceLayout MetaWorkspaceLayout;

struct MetaWorkspaceLayout
{
  int rows;
  int cols;
  int *grid;
  int grid_area;
  int current_row;
  int current_col;
};

void meta_screen_calc_workspace_layout (MetaScreen          *screen,
                                        int                  num_workspaces,
                                        int                  current_space,
                                        MetaWorkspaceLayout *layout);
void meta_screen_free_workspace_layout (MetaWorkspaceLayout *layout);

void meta_screen_resize (MetaScreen *screen,
                         int         width,
                         int         height);

void     meta_screen_minimize_all_on_active_workspace_except (MetaScreen *screen,
                                                              MetaWindow *keep);

/* Show/hide the desktop (temporarily hide all windows) */
void     meta_screen_show_desktop        (MetaScreen *screen,
                                          Time        timestamp);
void     meta_screen_unshow_desktop      (MetaScreen *screen);

/* Update whether the destkop is being shown for the current active_workspace */
void     meta_screen_update_showing_desktop_hint          (MetaScreen *screen);

void     meta_screen_apply_startup_properties (MetaScreen *screen,
                                               MetaWindow *window);


#endif