/*
 * Copyright (C) 2008 Canonical Ltd
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 3 as 
 * published by the Free Software Foundation.
 *
 * 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, see <http://www.gnu.org/licenses/>.
 *
 * Authored by Neil Jagdish Patel <neil.patel@canonical.com>
 *
 */

#include "task-list.h"
#include "task-item.h"

#define WNCK_I_KNOW_THIS_IS_UNSTABLE
#include <libwnck/libwnck.h>

G_DEFINE_TYPE (TaskList, task_list, GTK_TYPE_HBOX);

#define TASK_LIST_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE ((obj),\
  TASK_TYPE_LIST, \
  TaskListPrivate))

struct _TaskListPrivate
{
  WnckScreen *screen;
  GHashTable *win_table;
  guint timer;
  guint counter;

  gboolean show_all_windows;
};

enum
{
  PROP_0,
  
  PROP_SHOW_ALL_WINDOWS
};

static void
task_list_set_show_all_windows (TaskList *list, gboolean show_all_windows)
{
  TaskListPrivate *priv = list->priv;

  priv->show_all_windows = show_all_windows;

  g_debug ("Show all windows: %s", show_all_windows ? "true" : "false");
}

static void
on_task_item_closed (TaskItem *item,
                     TaskList *list)
{
  gtk_container_remove (GTK_CONTAINER (list),
                        GTK_WIDGET (item));
  gtk_widget_destroy (GTK_WIDGET (item));
}

static void
on_window_opened (WnckScreen *screen,
                  WnckWindow *window,
                  TaskList   *list)
{
  TaskListPrivate *priv;
  WnckWindowType type;

  g_return_if_fail (TASK_IS_LIST (list));
  priv = list->priv;

  type = wnck_window_get_window_type (window);

  if (type == WNCK_WINDOW_DESKTOP
      || type == WNCK_WINDOW_DOCK
      || type == WNCK_WINDOW_SPLASHSCREEN
      || type == WNCK_WINDOW_MENU)
    return;
    
  GtkWidget *item = task_item_new (window);
  
  if (item)
  {
    gtk_box_pack_start (GTK_BOX (list), item, FALSE, FALSE, 0);
    g_signal_connect (TASK_ITEM (item), "task-item-closed",
                      G_CALLBACK (on_task_item_closed), list);
  }
}

/* GObject stuff */
static void
task_list_finalize (GObject *object)
{
  TaskListPrivate *priv;

  priv = TASK_LIST_GET_PRIVATE (object);

  /* Remove the blink timer */
  if (priv->timer) g_source_remove (priv->timer);

  G_OBJECT_CLASS (task_list_parent_class)->finalize (object);
}

static void
task_list_get_property (GObject    *object,
                        guint       prop_id,
                        GValue     *value,
                        GParamSpec *pspec)
{
  TaskList *list = TASK_LIST (object);
  TaskListPrivate *priv;

  g_return_if_fail (TASK_IS_LIST (list));
  priv = list->priv;

  switch (prop_id)
  {
    case PROP_SHOW_ALL_WINDOWS:
      g_value_set_boolean (value, priv->show_all_windows);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
  }
}

static void
task_list_set_property (GObject      *object,
                        guint         prop_id,
                        const GValue *value,
                        GParamSpec   *pspec)
{
  TaskList *list = TASK_LIST (object);
  TaskListPrivate *priv;

  g_return_if_fail (TASK_IS_LIST (list));
  priv = list->priv;

  switch (prop_id)
  {
    case PROP_SHOW_ALL_WINDOWS:
      task_list_set_show_all_windows (list, g_value_get_boolean (value));
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
  }
}

static void
task_list_class_init (TaskListClass *klass)
{
  GObjectClass        *obj_class = G_OBJECT_CLASS (klass);

  obj_class->finalize = task_list_finalize;
  obj_class->set_property = task_list_set_property;
  obj_class->get_property = task_list_get_property;

  g_object_class_install_property (obj_class,
    PROP_SHOW_ALL_WINDOWS,
    g_param_spec_boolean ("show_all_windows",
                          "Show All Windows",
                          "Show windows from all workspaces",
                          TRUE,
                          G_PARAM_READWRITE | G_PARAM_CONSTRUCT));

  g_type_class_add_private (obj_class, sizeof (TaskListPrivate));
}

static void
task_list_init (TaskList *list)
{
  TaskListPrivate *priv;

  priv = list->priv = TASK_LIST_GET_PRIVATE (list);

  priv->screen = wnck_screen_get_default ();

  priv->win_table = g_hash_table_new (NULL, NULL);

  /* No blink timer */
  priv->timer = 0;

  gtk_container_set_border_width (GTK_CONTAINER (list), 0);

  g_signal_connect (priv->screen, "window-opened",
                    G_CALLBACK (on_window_opened), list);
}

GtkWidget *
task_list_new (void)

{
  GtkWidget *list = NULL;

  list = g_object_new (TASK_TYPE_LIST, 
                       "homogeneous", FALSE, 
                       "spacing", 0, 
                       NULL);
  
  return list;
}

GtkWidget *
task_list_get_default (void)
{
  static GtkWidget *list = NULL;

  if (!list)
    list = task_list_new ();

  return list;
}

gboolean    
task_list_get_desktop_visible (TaskList *list)
{
  GList *windows, *w;
  gboolean all_minimised = TRUE;

  g_return_val_if_fail (TASK_IS_LIST (list), TRUE);

  windows = wnck_screen_get_windows (list->priv->screen);
  for (w = windows; w; w = w->next)
  {
    WnckWindow *window;
    
    window = w->data;

    if (WNCK_IS_WINDOW (window) && !wnck_window_is_minimized (window))
      all_minimised = FALSE;
  }

  return all_minimised;
}

gboolean
task_list_get_show_all_windows (TaskList *list)
{
  return list->priv->show_all_windows;
}