/* Metacity Workspaces */

/* 
 * 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 "workspace.h"

void meta_workspace_queue_calc_showing  (MetaWorkspace *workspace);

MetaWorkspace*
meta_workspace_new (MetaScreen *screen)
{
  MetaWorkspace *workspace;

  workspace = g_new (MetaWorkspace, 1);

  workspace->screen = screen;
  workspace->screen->display->workspaces =
    g_list_append (workspace->screen->display->workspaces, workspace);
  workspace->windows = NULL;
  
  return workspace;
}

void
meta_workspace_free (MetaWorkspace *workspace)
{
  GList *tmp;
  
  tmp = workspace->windows;
  while (tmp != NULL)
    {
      GList *next;
      next = tmp->next;
      /* pop front of list */
      meta_workspace_remove_window (workspace, tmp->data);

      tmp = next;
    }

  g_assert (workspace->windows == NULL);
  
  workspace->screen->display->workspaces =
    g_list_remove (workspace->screen->display->workspaces, workspace);

  g_free (workspace);
}

void
meta_workspace_add_window (MetaWorkspace *workspace,
                           MetaWindow    *window)
{
  g_return_if_fail (g_list_find (workspace->windows, window) == NULL);

  workspace->windows = g_list_prepend (workspace->windows, window);
  window->workspaces = g_list_prepend (window->workspaces, workspace);

  meta_window_queue_calc_showing (window);
}

void
meta_workspace_remove_window (MetaWorkspace *workspace,
                              MetaWindow    *window)
{
  g_return_if_fail (g_list_find (workspace->windows, window) != NULL);

  workspace->windows = g_list_remove (workspace->windows, window);
  window->workspaces = g_list_remove (window->workspaces, workspace);

  meta_window_queue_calc_showing (window);
}

void
meta_workspace_queue_calc_showing  (MetaWorkspace *workspace)
{
  GList *tmp;

  tmp = workspace->windows;
  while (tmp != NULL)
    {
      meta_window_queue_calc_showing (tmp->data);

      tmp = tmp->next;
    }
}

void
meta_workspace_activate (MetaWorkspace *workspace)
{
  MetaWorkspace *old;
  
  meta_verbose ("Activating workspace %d\n",
                meta_workspace_index (workspace));
  
  if (workspace->screen->active_workspace == workspace)
    return;

  old = workspace->screen->active_workspace;
  
  workspace->screen->active_workspace = workspace;

  meta_workspace_queue_calc_showing (old);
  meta_workspace_queue_calc_showing (workspace);
}

int
meta_workspace_index (MetaWorkspace *workspace)
{
  GList *tmp;
  int i;

  i = 0;
  tmp = workspace->screen->display->workspaces;
  while (tmp != NULL)
    {
      if (tmp->data == workspace)
        return i;

      ++i;
                    
      tmp = tmp->next;
    }

  meta_bug ("Workspace does not exist to index!\n");
}