/*
 * Evolution calendar - Commands for the calendar GUI control
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) version 3.
 *
 * 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with the program; if not, see <http://www.gnu.org/licenses/>
 *
 *
 * Authors:
 *		Miguel de Icaza <miguel@ximian.com>
 *      Federico Mena-Quintero <federico@ximian.com>
 *      Seth Alves <alves@hungry.com>
 *      Rodrigo Moya <rodrigo@ximian.com>
 *
 * Copyright (C) 1999-2008 Novell, Inc. (www.novell.com)
 *
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>

#include <gtk/gtk.h>
#include <glib/gi18n.h>
#include <bonobo/bonobo-ui-util.h>
#include <bonobo/bonobo-exception.h>
#include <libecal/e-cal-time-util.h>
#include "shell/Evolution.h"
#include "calendar-commands.h"
#include "calendar-component.h"
#include "calendar-config.h"
#include "e-day-view.h"
#include "e-week-view.h"
#include "gnome-cal.h"
#include "goto.h"
#include "print.h"
#include "dialogs/cal-prefs-dialog.h"
#include "itip-utils.h"
#include "e-cal-list-view.h"
#include "evolution-shell-component-utils.h"
#include "e-util/e-icon-factory.h"
#include "e-util/e-util-private.h"
#include "e-cal-menu.h"

/* Focusing information for the calendar view.  We have to keep track of this
 * ourselves because with Bonobo controls, we may get unpaired focus_out events.
 */
typedef struct {
	guint calendar_focused : 1;
	guint taskpad_focused : 1;
} FocusData;

/* Sets a clock cursor for the specified calendar window */
static void
set_clock_cursor (GnomeCalendar *gcal)
{
	GdkCursor *cursor;

	cursor = gdk_cursor_new (GDK_WATCH);
	gdk_window_set_cursor (GTK_WIDGET (gcal)->window, cursor);
	gdk_cursor_unref (cursor);
	gdk_flush ();
}

/* Resets the normal cursor for the specified calendar window */
static void
set_normal_cursor (GnomeCalendar *gcal)
{
	gdk_window_set_cursor (GTK_WIDGET (gcal)->window, NULL);
	gdk_flush ();
}

static void
show_day_view_clicked (BonoboUIComponent *uic, gpointer data, const gchar *path)
{
	GnomeCalendar *gcal;

	gcal = GNOME_CALENDAR (data);

	gnome_calendar_set_view (gcal, GNOME_CAL_DAY_VIEW);
}

static void
show_work_week_view_clicked (BonoboUIComponent *uic, gpointer data, const gchar *path)
{
	GnomeCalendar *gcal;

	gcal = GNOME_CALENDAR (data);

	gnome_calendar_set_view (gcal, GNOME_CAL_WORK_WEEK_VIEW);
}

static void
show_week_view_clicked (BonoboUIComponent *uic, gpointer data, const gchar *path)
{
	GnomeCalendar *gcal;

	gcal = GNOME_CALENDAR (data);

	gnome_calendar_set_view (gcal, GNOME_CAL_WEEK_VIEW);
}

static void
show_month_view_clicked (BonoboUIComponent *uic, gpointer data, const gchar *path)
{
	GnomeCalendar *gcal;

	gcal = GNOME_CALENDAR (data);

	gnome_calendar_set_view (gcal, GNOME_CAL_MONTH_VIEW);
}

static void
show_list_view_clicked (BonoboUIComponent *uic, gpointer data, const gchar *path)
{
	GnomeCalendar *gcal;

	gcal = GNOME_CALENDAR (data);

	gnome_calendar_set_view (gcal, GNOME_CAL_LIST_VIEW);
}

struct _sensitize_item {
	const gchar *command;
	guint32 enable;
};

static void
sensitize_items(BonoboUIComponent *uic, struct _sensitize_item *items, guint32 mask)
{
	while (items->command) {
		gchar command[32];

		if (strlen(items->command)>=21) {
			g_warning ("items->command >= 21: %s\n", items->command);
			continue;
		}
		sprintf(command, "/commands/%s", items->command);

		bonobo_ui_component_set_prop (uic, command, "sensitive",
					      (items->enable & mask) == 0 ? "1" : "0",
					      NULL);
		items++;
	}
}

static struct _sensitize_item taskpad_sensitize_table[] = {
	{ "Cut", E_CAL_MENU_SELECT_EDITABLE | E_CAL_MENU_SELECT_ANY },
	{ "Copy", E_CAL_MENU_SELECT_ANY },
	{ "Paste", E_CAL_MENU_SELECT_EDITABLE },
	{ "Delete", E_CAL_MENU_SELECT_EDITABLE },
	{ NULL }
};

/* Sensitizes the UI Component menu/toolbar tasks commands based on the number
 * of selected tasks.  If enable is FALSE, all will be disabled.  Otherwise, the
 * currently-selected number of tasks will be used.
 */
static void
sensitize_taskpad_commands (GnomeCalendar *gcal, BonoboControl *control, gboolean enable)
{
	BonoboUIComponent *uic;
	ECalendarTable *task_pad;
	ECalModel *model;
	GSList *selected, *l;
	ECalMenu *menu;
	GPtrArray *events;
	ECalMenuTargetSelect *t;

	uic = bonobo_control_get_ui_component (control);
	g_return_if_fail (uic != NULL);

	menu = gnome_calendar_get_calendar_menu (gcal);
	task_pad = gnome_calendar_get_task_pad(gcal);
	model = e_calendar_table_get_model (task_pad);
	selected = e_calendar_table_get_selected(task_pad);
	events = g_ptr_array_new();
	for (l=selected;l;l=g_slist_next(l))
		g_ptr_array_add(events, e_cal_model_copy_component_data((ECalModelComponent *)l->data));
	g_slist_free(selected);

	t = e_cal_menu_target_new_select(menu, model, events);
	if (!enable)
		t->target.mask = ~((~t->target.mask) & E_CAL_MENU_SELECT_EDITABLE);

	sensitize_items(uic, taskpad_sensitize_table, t->target.mask);
}

/* Callback used when the selection in the calendar views changes */
static void
gcal_calendar_selection_changed_cb (GnomeCalendar *gcal, gpointer data)
{
	BonoboControl *control;

	control = BONOBO_CONTROL (data);

	calendar_control_sensitize_calendar_commands (control, gcal, TRUE);
}

/* Callback used when the selection in the taskpad changes */
static void
gcal_taskpad_selection_changed_cb (GnomeCalendar *gcal, gpointer data)
{
	BonoboControl *control;

	control = BONOBO_CONTROL (data);

	sensitize_taskpad_commands (gcal, control, TRUE);
}

/* Callback used when the focus changes for a calendar view */
static void
gcal_calendar_focus_change_cb (GnomeCalendar *gcal, gboolean in, gpointer data)
{
	BonoboControl *control;
	FocusData *focus;

	control = BONOBO_CONTROL (data);

	focus = g_object_get_data (G_OBJECT (control), "focus_data");
	g_return_if_fail (focus != NULL);

	if (in) {
		g_signal_connect (gcal, "calendar_selection_changed",
				  G_CALLBACK (gcal_calendar_selection_changed_cb), control);
		calendar_control_sensitize_calendar_commands (control, gcal, TRUE);
		focus->calendar_focused = TRUE;
	} else if (focus->calendar_focused) {
		g_signal_handlers_disconnect_by_func (
			gcal, G_CALLBACK (gcal_calendar_selection_changed_cb), control);
		calendar_control_sensitize_calendar_commands (control, gcal, FALSE);
		focus->calendar_focused = FALSE;
	}
}

/* Callback used when the taskpad focus changes */
static void
gcal_taskpad_focus_change_cb (GnomeCalendar *gcal, gboolean in, gpointer data)
{
	BonoboControl *control;
	FocusData *focus;

	control = BONOBO_CONTROL (data);

	focus = g_object_get_data (G_OBJECT (control), "focus_data");
	g_return_if_fail (focus != NULL);

	if (in) {
		g_signal_connect (gcal, "taskpad_selection_changed",
				  G_CALLBACK (gcal_taskpad_selection_changed_cb), control);
		sensitize_taskpad_commands (gcal, control, TRUE);
		focus->taskpad_focused = TRUE;
	} else if (focus->taskpad_focused) {
		/* With Bonobo controls, we may get unpaired focus_out events.
		 * That is why we have to keep track of this ourselves instead
		 * of blindly assumming that we are getting this event because
		 * the taskpad was in fact focused.
		 */
		g_signal_handlers_disconnect_by_func (
			gcal, G_CALLBACK (gcal_taskpad_selection_changed_cb), control);
		sensitize_taskpad_commands (gcal, control, FALSE);
		focus->taskpad_focused = FALSE;
	}

}

static void
help_debug (BonoboUIComponent *uid, gpointer data, const gchar *path)
{
	calendar_component_show_logger ((GtkWidget *) data);
}

static BonoboUIVerb verbs [] = {

	BONOBO_UI_VERB ("ShowDayView", show_day_view_clicked),
	BONOBO_UI_VERB ("ShowWorkWeekView", show_work_week_view_clicked),
	BONOBO_UI_VERB ("ShowWeekView", show_week_view_clicked),
	BONOBO_UI_VERB ("ShowMonthView", show_month_view_clicked),
	BONOBO_UI_VERB ("ShowListView", show_list_view_clicked),

	BONOBO_UI_VERB ("HelpDebug", help_debug),
	BONOBO_UI_VERB_END
};

void
calendar_control_activate (BonoboControl *control,
			   GnomeCalendar *gcal)
{
	Bonobo_UIContainer remote_uih;
	BonoboUIComponent *uic;
	FocusData *focus;
	gchar *xmlfile;

	uic = bonobo_control_get_ui_component (control);
	g_return_if_fail (uic != NULL);

	remote_uih = bonobo_control_get_remote_ui_container (control, NULL);
	bonobo_ui_component_set_container (uic, remote_uih, NULL);
	bonobo_object_release_unref (remote_uih, NULL);

	gnome_calendar_set_ui_component (gcal, uic);

	bonobo_ui_component_add_verb_list_with_data (uic, verbs, gcal);

	bonobo_ui_component_freeze (uic, NULL);

	xmlfile = g_build_filename (EVOLUTION_UIDIR,
				    "evolution-calendar.xml",
				    NULL);
	bonobo_ui_util_set_ui (uic, PREFIX,
			       xmlfile,
			       "evolution-calendar",
			       NULL);
	g_free (xmlfile);

	gnome_calendar_setup_view_menus (gcal, uic);

	g_signal_connect (gcal, "calendar_focus_change",
			  G_CALLBACK (gcal_calendar_focus_change_cb), control);
	g_signal_connect (gcal, "taskpad_focus_change",
			  G_CALLBACK (gcal_taskpad_focus_change_cb), control);

	e_menu_activate((EMenu *)gnome_calendar_get_calendar_menu (gcal), uic, 1);
	e_menu_activate((EMenu *)gnome_calendar_get_taskpad_menu (gcal), uic, 1);

	calendar_control_sensitize_calendar_commands (control, gcal, TRUE);
	sensitize_taskpad_commands (gcal, control, TRUE);

	bonobo_ui_component_thaw (uic, NULL);

	focus = g_new (FocusData, 1);
	focus->calendar_focused = FALSE;
	focus->taskpad_focused = FALSE;

	g_object_set_data (G_OBJECT (control), "focus_data", focus);
}

void
calendar_control_deactivate (BonoboControl *control, GnomeCalendar *gcal)
{
	FocusData *focus;
	BonoboUIComponent *uic;

	uic = bonobo_control_get_ui_component (control);
	g_return_if_fail (uic != NULL);

	e_menu_activate((EMenu *)gnome_calendar_get_calendar_menu (gcal), uic, 0);
	e_menu_activate((EMenu *)gnome_calendar_get_taskpad_menu (gcal), uic, 0);

	gnome_calendar_set_ui_component (gcal, NULL);

	focus = g_object_get_data (G_OBJECT (control), "focus_data");
	g_return_if_fail (focus != NULL);

	g_object_set_data (G_OBJECT (control), "focus_data", NULL);
	g_free (focus);

	gnome_calendar_discard_view_menus (gcal);

	g_signal_handlers_disconnect_matched (gcal, G_SIGNAL_MATCH_DATA, 0, 0, NULL, NULL, control);

	bonobo_ui_component_rm (uic, "/", NULL);
	bonobo_ui_component_unset_container (uic, NULL);
}