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	diff --git a/plugins/calendar/calendar_ui.js b/plugins/calendar/calendar_ui.js
	index 83f69e02..6bb5d78d 100644
	--- a/plugins/calendar/calendar_ui.js
	+++ b/plugins/calendar/calendar_ui.js
	@@ -1,2761 +1,2758 @@
	/**
	* Client UI Javascript for the Calendar plugin
	*
	* @version @package_version@
	* @author Lazlo Westerhof <hello@lazlo.me>
	* @author Thomas Bruederli <bruederli@kolabsys.com>
	*
	* Copyright (C) 2010, Lazlo Westerhof <hello@lazlo.me>
	* Copyright (C) 2012, Kolab Systems AG <contact@kolabsys.com>
	*
	* This program is free software: you can redistribute it and/or modify
	* it under the terms of the GNU Affero General Public License as
	* published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
	*
	* You should have received a copy of the GNU Affero General Public License
	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	*/

	// Roundcube calendar UI client class
	function rcube_calendar_ui(settings)
	{
	// extend base class
	rcube_calendar.call(this, settings);

	/* member vars */
	this.is_loading = false;
	this.selected_event = null;
	this.selected_calendar = null;
	this.search_request = null;
	this.saving_lock;


	/* private vars */
	var DAY_MS = 86400000;
	var HOUR_MS = 3600000;
	var me = this;
	var gmt_offset = (new Date().getTimezoneOffset() / -60) - (settings.timezone \|\| 0) - (settings.dst \|\| 0);
	var client_timezone = new Date().getTimezoneOffset();
	var day_clicked = day_clicked_ts = 0;
	var ignore_click = false;
	var event_defaults = { free_busy:'busy', alarms:'' };
	var event_attendees = [];
	var attendees_list;
	var freebusy_ui = { workinhoursonly:false, needsupdate:false };
	var freebusy_data = {};
	var current_view = null;
	var exec_deferred = bw.ie6 ? 5 : 1;
	var sensitivitylabels = { 0:rcmail.gettext('public','calendar'), 1:rcmail.gettext('private','calendar'), 2:rcmail.gettext('confidential','calendar') };
	var ui_loading = rcmail.set_busy(true, 'loading');

	// general datepicker settings
	var datepicker_settings = {
	// translate from fullcalendar format to datepicker format
	dateFormat: settings['date_format'].replace(/M/g, 'm').replace(/mmmmm/, 'MM').replace(/mmm/, 'M').replace(/dddd/, 'DD').replace(/ddd/, 'D').replace(/yy/g, 'y'),
	firstDay : settings['first_day'],
	dayNamesMin: settings['days_short'],
	monthNames: settings['months'],
	monthNamesShort: settings['months'],
	changeMonth: false,
	showOtherMonths: true,
	selectOtherMonths: true
	};

	/* imports */
	var Q = this.quote_html;
	var text2html = this.text2html;
	var event_date_text = this.event_date_text;
	var parse_datetime = this.parse_datetime;
	var date2unixtime = this.date2unixtime;
	var fromunixtime = this.fromunixtime;
	var parseISO8601 = this.parseISO8601;
	var init_alarms_edit = this.init_alarms_edit;


	/* private methods */

	// same as str.split(delimiter) but it ignores delimiters within quoted strings
	var explode_quoted_string = function(str, delimiter)
	{
	var result = [],
	strlen = str.length,
	q, p, i, char, last;

	for (q = p = i = 0; i < strlen; i++) {
	char = str.charAt(i);
	if (char == '"' && last != '\\') {
	q = !q;
	}
	else if (!q && char == delimiter) {
	result.push(str.substring(p, i));
	p = i + 1;
	}
	last = char;
	}

	result.push(str.substr(p));
	return result;
	};


	// clone the given date object and optionally adjust time
	var clone_date = function(date, adjust)
	{
	var d = new Date(date.getTime());

	// set time to 00:00
	if (adjust == 1) {
	d.setHours(0);
	d.setMinutes(0);
	}
	// set time to 23:59
	else if (adjust == 2) {
	d.setHours(23);
	d.setMinutes(59);
	}

	return d;
	};

	// fix date if jumped over a DST change
	var fix_date = function(date)
	{
	if (date.getHours() == 23)
	date.setTime(date.getTime() + HOUR_MS);
	else if (date.getHours() > 0)
	date.setHours(0);
	};

	// turn the given date into an ISO 8601 date string understandable by PHPs strtotime()
	var date2servertime = function(date)
	{
	return date.getFullYear()+'-'+zeropad(date.getMonth()+1)+'-'+zeropad(date.getDate())
	+ 'T'+zeropad(date.getHours())+':'+zeropad(date.getMinutes())+':'+zeropad(date.getSeconds());
	}

	var date2timestring = function(date, dateonly)
	{
	return date2servertime(date).replace(/[^0-9]/g, '').substr(0, (dateonly ? 8 : 14));
	}

	var zeropad = function(num)
	{
	return (num < 10 ? '0' : '') + num;
	}

	var render_link = function(url)
	{
	var islink = false, href = url;
	if (url.match(/^[fhtpsmailo]+?:\/\//i)) {
	islink = true;
	}
	else if (url.match(/^[a-z0-9.-:]+(\/\|$)/i)) {
	islink = true;
	href = 'http://' + url;
	}
	return islink ? '<a href="' + Q(href) + '" target="_blank">' + Q(url) + '</a>' : Q(url);
	}

	// determine whether the given date is on a weekend
	var is_weekend = function(date)
	{
	return date.getDay() == 0 \|\| date.getDay() == 6;
	};

	var is_workinghour = function(date)
	{
	if (settings['work_start'] > settings['work_end'])
	return date.getHours() >= settings['work_start'] \|\| date.getHours() < settings['work_end'];
	else
	return date.getHours() >= settings['work_start'] && date.getHours() < settings['work_end'];
	};

	// check if the event has 'real' attendees, excluding the current user
	var has_attendees = function(event)
	{
	return (event.attendees && event.attendees.length && (event.attendees.length > 1 \|\| String(event.attendees[0].email).toLowerCase() != settings.identity.email));
	};

	// check if the current user is an attendee of this event
	var is_attendee = function(event, role, email)
	{
	var emails = email ? ';'+email.toLowerCase() : settings.identity.emails;
	for (var i=0; event.attendees && i < event.attendees.length; i++) {
	if ((!role \|\| event.attendees[i].role == role) && event.attendees[i].email && emails.indexOf(';'+event.attendees[i].email.toLowerCase()) >= 0)
	return event.attendees[i];
	}
	return false;
	};

	// check if the current user is the organizer
	var is_organizer = function(event, email)
	{
	return is_attendee(event, 'ORGANIZER', email) \|\| !event.id;
	};

	var load_attachment = function(event, att)
	{
	var qstring = '_id='+urlencode(att.id)+'&_event='+urlencode(event.recurrence_id\|\|event.id)+'&_cal='+urlencode(event.calendar);

	// open attachment in frame if it's of a supported mimetype
	if (id && att.mimetype && $.inArray(att.mimetype, settings.mimetypes)>=0) {
	- rcmail.attachment_win = window.open(rcmail.env.comm_path+'&_action=get-attachment&'+qstring+'&_frame=1', 'rcubeeventattachment');
	- if (rcmail.attachment_win) {
	- window.setTimeout(function() { rcmail.attachment_win.focus(); }, 10);
	+ if (rcmail.open_window(rcmail.env.comm_path+'&_action=get-attachment&'+qstring+'&_frame=1', true, true)) {
	return;
	}
	}

	rcmail.goto_url('get-attachment', qstring+'&_download=1', false);
	};

	// build event attachments list
	var event_show_attachments = function(list, container, event, edit)
	{
	var i, id, len, img, content, li, elem,
	ul = document.createElement('UL');
	ul.className = 'attachmentslist';

	for (i=0, len=list.length; i<len; i++) {
	elem = list[i];
	li = document.createElement('LI');
	li.className = elem.classname;

	if (edit) {
	rcmail.env.attachments[elem.id] = elem;
	// delete icon
	content = document.createElement('A');
	content.href = '#delete';
	content.title = rcmail.gettext('delete');
	content.className = 'delete';
	$(content).click({id: elem.id}, function(e) { remove_attachment(this, e.data.id); return false; });

	if (!rcmail.env.deleteicon)
	content.innerHTML = rcmail.gettext('delete');
	else {
	img = document.createElement('IMG');
	img.src = rcmail.env.deleteicon;
	img.alt = rcmail.gettext('delete');
	content.appendChild(img);
	}

	li.appendChild(content);
	}

	// name/link
	content = document.createElement('A');
	content.innerHTML = elem.name;
	content.className = 'file';
	content.href = '#load';
	$(content).click({event: event, att: elem}, function(e) {
	load_attachment(e.data.event, e.data.att); return false; });
	li.appendChild(content);

	ul.appendChild(li);
	}

	if (edit && rcmail.gui_objects.attachmentlist) {
	ul.id = rcmail.gui_objects.attachmentlist.id;
	rcmail.gui_objects.attachmentlist = ul;
	}

	container.empty().append(ul);
	};

	var remove_attachment = function(elem, id)
	{
	$(elem.parentNode).hide();
	rcmail.env.deleted_attachments.push(id);
	delete rcmail.env.attachments[id];
	};

	// event details dialog (show only)
	var event_show_dialog = function(event)
	{
	var $dialog = $("#eventshow").removeClass().addClass('uidialog');
	var calendar = event.calendar && me.calendars[event.calendar] ? me.calendars[event.calendar] : { editable:false };
	me.selected_event = event;

	// allow other plugins to do actions when event form is opened
	rcmail.triggerEvent('calendar-event-init', {o: event});

	$dialog.find('div.event-section, div.event-line').hide();
	$('#event-title').html(Q(event.title)).show();

	if (event.location)
	$('#event-location').html('@ ' + text2html(event.location)).show();
	if (event.description)
	$('#event-description').show().children('.event-text').html(text2html(event.description, 300, 6));
	if (event.vurl)
	$('#event-url').show().children('.event-text').html(render_link(event.vurl));

	// render from-to in a nice human-readable way
	// -> now shown in dialog title
	// $('#event-date').html(Q(me.event_date_text(event))).show();

	if (event.recurrence && event.recurrence_text)
	$('#event-repeat').show().children('.event-text').html(Q(event.recurrence_text));

	if (event.alarms && event.alarms_text)
	$('#event-alarm').show().children('.event-text').html(Q(event.alarms_text));

	if (calendar.name)
	$('#event-calendar').show().children('.event-text').html(Q(calendar.name)).removeClass().addClass('event-text').addClass('cal-'+calendar.id);
	if (event.categories)
	$('#event-category').show().children('.event-text').html(Q(event.categories)).removeClass().addClass('event-text cat-'+String(event.categories).replace(rcmail.identifier_expr, ''));
	if (event.free_busy)
	$('#event-free-busy').show().children('.event-text').html(Q(rcmail.gettext(event.free_busy, 'calendar')));
	if (event.priority > 0) {
	var priolabels = [ '', rcmail.gettext('highest'), rcmail.gettext('high'), '', '', rcmail.gettext('normal'), '', '', rcmail.gettext('low'), rcmail.gettext('lowest') ];
	$('#event-priority').show().children('.event-text').html(Q(event.priority+' '+priolabels[event.priority]));
	}

	if (event.sensitivity != 0) {
	var sensitivityclasses = { 0:'public', 1:'private', 2:'confidential' };
	$('#event-sensitivity').show().children('.event-text').html(Q(sensitivitylabels[event.sensitivity]));
	$dialog.addClass('sensitivity-'+sensitivityclasses[event.sensitivity]);
	}

	// create attachments list
	if ($.isArray(event.attachments)) {
	event_show_attachments(event.attachments, $('#event-attachments').children('.event-text'), event);
	if (event.attachments.length > 0) {
	$('#event-attachments').show();
	}
	}
	else if (calendar.attachments) {
	// fetch attachments, some drivers doesn't set 'attachments' prop of the event?
	}

	// list event attendees
	if (calendar.attendees && event.attendees) {
	var data, dispname, organizer = false, rsvp = false, html = '';
	for (var j=0; j < event.attendees.length; j++) {
	data = event.attendees[j];
	dispname = Q(data.name \|\| data.email);
	if (data.email) {
	dispname = '<a href="mailto:' + data.email + '" title="' + Q(data.email) + '" class="mailtolink">' + dispname + '</a>';
	if (data.role == 'ORGANIZER')
	organizer = true;
	else if ((data.status == 'NEEDS-ACTION' \|\| data.status == 'TENTATIVE') && settings.identity.emails.indexOf(';'+data.email) >= 0)
	rsvp = data.status.toLowerCase();
	}
	html += '<span class="attendee ' + String(data.role == 'ORGANIZER' ? 'organizer' : data.status).toLowerCase() + '">' + dispname + '</span> ';

	// stop listing attendees
	if (j == 7 && event.attendees.length >= 7) {
	html += ' <em>' + rcmail.gettext('andnmore', 'calendar').replace('$nr', event.attendees.length - j - 1) + '</em>';
	break;
	}
	}

	if (html && (event.attendees.length > 1 \|\| !organizer)) {
	$('#event-attendees').show()
	.children('.event-text')
	.html(html)
	.find('a.mailtolink').click(function(e) { rcmail.redirect(rcmail.url('mail/compose', { _to:this.href.substr(7) })); return false; });
	}

	$('#event-rsvp')[(rsvp&&!organizer?'show':'hide')]();
	$('#event-rsvp .rsvp-buttons input').prop('disabled', false).filter('input[rel='+rsvp+']').prop('disabled', true);
	}

	var buttons = {};
	if (calendar.editable && event.editable !== false) {
	buttons[rcmail.gettext('edit', 'calendar')] = function() {
	event_edit_dialog('edit', event);
	};
	buttons[rcmail.gettext('remove', 'calendar')] = function() {
	me.delete_event(event);
	$dialog.dialog('close');
	};
	}
	else {
	buttons[rcmail.gettext('close', 'calendar')] = function(){
	$dialog.dialog('close');
	};
	}

	// open jquery UI dialog
	$dialog.dialog({
	modal: false,
	resizable: !bw.ie6,
	closeOnEscape: (!bw.ie6 && !bw.ie7), // disable for performance reasons
	title: Q(me.event_date_text(event)),
	open: function() {
	$dialog.parent().find('.ui-button').first().focus();
	},
	close: function() {
	$dialog.dialog('destroy').hide();
	},
	buttons: buttons,
	minWidth: 320,
	width: 420
	}).show();

	// set dialog size according to content
	me.dialog_resize($dialog.get(0), $dialog.height(), 420);
	/*
	// add link for "more options" drop-down
	$('<a>')
	.attr('href', '#')
	.html('More Options')
	.addClass('dropdown-link')
	.click(function(){ return false; })
	.insertBefore($dialog.parent().find('.ui-dialog-buttonset').children().first());
	*/
	};

	// bring up the event dialog (jquery-ui popup)
	var event_edit_dialog = function(action, event)
	{
	// close show dialog first
	$("#eventshow:ui-dialog").dialog('close');

	var $dialog = $('<div>');
	var calendar = event.calendar && me.calendars[event.calendar] ? me.calendars[event.calendar] : { editable:action=='new' };
	me.selected_event = $.extend($.extend({}, event_defaults), event); // clone event object (with defaults)
	event = me.selected_event; // change reference to clone
	freebusy_ui.needsupdate = false;

	// reset dialog first
	$('#eventtabs').get(0).reset();

	// allow other plugins to do actions when event form is opened
	rcmail.triggerEvent('calendar-event-init', {o: event});

	// event details
	var title = $('#edit-title').val(event.title \|\| '');
	var location = $('#edit-location').val(event.location \|\| '');
	var description = $('#edit-description').html(event.description \|\| '');
	var vurl = $('#edit-url').val(event.vurl \|\| '');
	var categories = $('#edit-categories').val(event.categories);
	var calendars = $('#edit-calendar').val(event.calendar);
	var freebusy = $('#edit-free-busy').val(event.free_busy);
	var priority = $('#edit-priority').val(event.priority);
	var sensitivity = $('#edit-sensitivity').val(event.sensitivity);

	var duration = Math.round((event.end.getTime() - event.start.getTime()) / 1000);
	var startdate = $('#edit-startdate').val($.fullCalendar.formatDate(event.start, settings['date_format'])).data('duration', duration);
	var starttime = $('#edit-starttime').val($.fullCalendar.formatDate(event.start, settings['time_format'])).show();
	var enddate = $('#edit-enddate').val($.fullCalendar.formatDate(event.end, settings['date_format']));
	var endtime = $('#edit-endtime').val($.fullCalendar.formatDate(event.end, settings['time_format'])).show();
	var allday = $('#edit-allday').get(0);
	var notify = $('#edit-attendees-donotify').get(0);
	var invite = $('#edit-attendees-invite').get(0);
	notify.checked = has_attendees(event), invite.checked = true;

	if (event.allDay) {
	starttime.val("12:00").hide();
	endtime.val("13:00").hide();
	allday.checked = true;
	}
	else {
	allday.checked = false;
	}

	// set alarm(s)
	// TODO: support multiple alarm entries
	if (event.alarms \|\| action != 'new') {
	if (typeof event.alarms == 'string')
	event.alarms = event.alarms.split(';');

	var valarms = event.alarms \|\| [''];
	for (var alarm, i=0; i < valarms.length; i++) {
	alarm = String(valarms[i]).split(':');
	if (!alarm[1] && alarm[0]) alarm[1] = 'DISPLAY';
	$('#eventedit select.edit-alarm-type').val(alarm[1]);

	if (alarm[0].match(/@(\d+)/)) {
	var ondate = fromunixtime(parseInt(RegExp.$1));
	$('#eventedit select.edit-alarm-offset').val('@');
	$('#eventedit input.edit-alarm-date').val($.fullCalendar.formatDate(ondate, settings['date_format']));
	$('#eventedit input.edit-alarm-time').val($.fullCalendar.formatDate(ondate, settings['time_format']));
	}
	else if (alarm[0].match(/([-+])(\d+)([MHD])/)) {
	$('#eventedit input.edit-alarm-value').val(RegExp.$2);
	$('#eventedit select.edit-alarm-offset').val(''+RegExp.$1+RegExp.$3);
	}
	}
	}
	// set correct visibility by triggering onchange handlers
	$('#eventedit select.edit-alarm-type, #eventedit select.edit-alarm-offset').change();

	// enable/disable alarm property according to backend support
	$('#edit-alarms')[(calendar.alarms ? 'show' : 'hide')]();

	// check categories drop-down: add value if not exists
	if (event.categories && !categories.find("option[value='"+event.categories+"']").length) {
	$('<option>').attr('value', event.categories).text(event.categories).appendTo(categories).prop('selected', true);
	}

	// set recurrence form
	var recurrence, interval, rrtimes, rrenddate;
	var load_recurrence_tab = function()
	{
	recurrence = $('#edit-recurrence-frequency').val(event.recurrence ? event.recurrence.FREQ : '').change();
	interval = $('#eventedit select.edit-recurrence-interval').val(event.recurrence ? event.recurrence.INTERVAL : 1);
	rrtimes = $('#edit-recurrence-repeat-times').val(event.recurrence ? event.recurrence.COUNT : 1);
	rrenddate = $('#edit-recurrence-enddate').val(event.recurrence && event.recurrence.UNTIL ? $.fullCalendar.formatDate(parseISO8601(event.recurrence.UNTIL), settings['date_format']) : '');
	$('#eventedit input.edit-recurrence-until:checked').prop('checked', false);

	var weekdays = ['SU','MO','TU','WE','TH','FR','SA'];
	var rrepeat_id = '#edit-recurrence-repeat-forever';
	if (event.recurrence && event.recurrence.COUNT) rrepeat_id = '#edit-recurrence-repeat-count';
	else if (event.recurrence && event.recurrence.UNTIL) rrepeat_id = '#edit-recurrence-repeat-until';
	$(rrepeat_id).prop('checked', true);

	if (event.recurrence && event.recurrence.BYDAY && event.recurrence.FREQ == 'WEEKLY') {
	var wdays = event.recurrence.BYDAY.split(',');
	$('input.edit-recurrence-weekly-byday').val(wdays);
	}
	if (event.recurrence && event.recurrence.BYMONTHDAY) {
	$('input.edit-recurrence-monthly-bymonthday').val(String(event.recurrence.BYMONTHDAY).split(','));
	$('input.edit-recurrence-monthly-mode').val(['BYMONTHDAY']);
	}
	if (event.recurrence && event.recurrence.BYDAY && (event.recurrence.FREQ == 'MONTHLY' \|\| event.recurrence.FREQ == 'YEARLY')) {
	var byday, section = event.recurrence.FREQ.toLowerCase();
	if ((byday = String(event.recurrence.BYDAY).match(/(-?[1-4])([A-Z]+)/))) {
	$('#edit-recurrence-'+section+'-prefix').val(byday[1]);
	$('#edit-recurrence-'+section+'-byday').val(byday[2]);
	}
	$('input.edit-recurrence-'+section+'-mode').val(['BYDAY']);
	}
	else if (event.start) {
	$('#edit-recurrence-monthly-byday').val(weekdays[event.start.getDay()]);
	}
	if (event.recurrence && event.recurrence.BYMONTH) {
	$('input.edit-recurrence-yearly-bymonth').val(String(event.recurrence.BYMONTH).split(','));
	}
	else if (event.start) {
	$('input.edit-recurrence-yearly-bymonth').val([String(event.start.getMonth()+1)]);
	}
	};

	// show warning if editing a recurring event
	if (event.id && event.recurrence) {
	var sel = event.thisandfuture ? 'future' : (event.isexception ? 'current' : 'all');
	$('#edit-recurring-warning').show();
	$('input.edit-recurring-savemode[value="'+sel+'"]').prop('checked', true);
	}
	else
	$('#edit-recurring-warning').hide();

	// init attendees tab
	var organizer = !event.attendees \|\| is_organizer(event);
	event_attendees = [];
	attendees_list = $('#edit-attendees-table > tbody').html('');
	$('#edit-attendees-notify')[(notify.checked && organizer ? 'show' : 'hide')]();
	$('#edit-localchanges-warning')[(has_attendees(event) && !(organizer \|\| (calendar.owner && is_organizer(event, calendar.owner))) ? 'show' : 'hide')]();

	var load_attendees_tab = function()
	{
	if (event.attendees) {
	for (var j=0; j < event.attendees.length; j++)
	add_attendee(event.attendees[j], !organizer);
	}

	// select the correct organizer identity
	var identity_id = 0;
	$.each(settings.identities, function(i,v){
	if (organizer && v == organizer.email) {
	identity_id = i;
	return false;
	}
	});
	$('#edit-identities-list').val(identity_id);
	$('#edit-attendees-form')[(organizer?'show':'hide')]();
	$('#edit-attendee-schedule')[(calendar.freebusy?'show':'hide')]();
	};

	// attachments
	var load_attachments_tab = function()
	{
	rcmail.enable_command('remove-attachment', !calendar.readonly);
	rcmail.env.deleted_attachments = [];
	// we're sharing some code for uploads handling with app.js
	rcmail.env.attachments = [];
	rcmail.env.compose_id = event.id; // for rcmail.async_upload_form()

	if ($.isArray(event.attachments)) {
	event_show_attachments(event.attachments, $('#edit-attachments'), event, true);
	}
	else {
	$('#edit-attachments > ul').empty();
	// fetch attachments, some drivers doesn't set 'attachments' array for event?
	}
	};

	// init dialog buttons
	var buttons = {};

	// save action
	buttons[rcmail.gettext('save', 'calendar')] = function() {
	var start = parse_datetime(allday.checked ? '12:00' : starttime.val(), startdate.val());
	var end = parse_datetime(allday.checked ? '13:00' : endtime.val(), enddate.val());

	// basic input validatetion
	if (start.getTime() > end.getTime()) {
	alert(rcmail.gettext('invalideventdates', 'calendar'));
	return false;
	}

	// post data to server
	var data = {
	calendar: event.calendar,
	start: date2servertime(start),
	end: date2servertime(end),
	allday: allday.checked?1:0,
	title: title.val(),
	description: description.val(),
	location: location.val(),
	categories: categories.val(),
	vurl: vurl.val(),
	free_busy: freebusy.val(),
	priority: priority.val(),
	sensitivity: sensitivity.val(),
	recurrence: '',
	alarms: '',
	attendees: event_attendees,
	deleted_attachments: rcmail.env.deleted_attachments,
	attachments: []
	};

	// serialize alarm settings
	// TODO: support multiple alarm entries
	var alarm = $('#eventedit select.edit-alarm-type').val();
	if (alarm) {
	var val, offset = $('#eventedit select.edit-alarm-offset').val();
	if (offset == '@')
	data.alarms = '@' + date2unixtime(parse_datetime($('#eventedit input.edit-alarm-time').val(), $('#eventedit input.edit-alarm-date').val())) + ':' + alarm;
	else if ((val = parseInt($('#eventedit input.edit-alarm-value').val())) && !isNaN(val) && val >= 0)
	data.alarms = offset[0] + val + offset[1] + ':' + alarm;
	}

	// uploaded attachments list
	for (var i in rcmail.env.attachments)
	if (i.match(/^rcmfile(.+)/))
	data.attachments.push(RegExp.$1);

	// read attendee roles
	$('select.edit-attendee-role').each(function(i, elem){
	if (data.attendees[i])
	data.attendees[i].role = $(elem).val();
	});

	if (organizer)
	data._identity = $('#edit-identities-list option:selected').val();

	// don't submit attendees if only myself is added as organizer
	if (data.attendees.length == 1 && data.attendees[0].role == 'ORGANIZER' && String(data.attendees[0].email).toLowerCase() == settings.identity.email)
	data.attendees = [];

	// tell server to send notifications
	if ((data.attendees.length \|\| (event.id && event.attendees.length)) && organizer && (notify.checked \|\| invite.checked)) {
	data._notify = 1;
	}

	// gather recurrence settings
	var freq;
	if ((freq = recurrence.val()) != '') {
	data.recurrence = {
	FREQ: freq,
	INTERVAL: $('#edit-recurrence-interval-'+freq.toLowerCase()).val()
	};

	var until = $('input.edit-recurrence-until:checked').val();
	if (until == 'count')
	data.recurrence.COUNT = rrtimes.val();
	else if (until == 'until')
	data.recurrence.UNTIL = date2servertime(parse_datetime(endtime.val(), rrenddate.val()));

	if (freq == 'WEEKLY') {
	var byday = [];
	$('input.edit-recurrence-weekly-byday:checked').each(function(){ byday.push(this.value); });
	if (byday.length)
	data.recurrence.BYDAY = byday.join(',');
	}
	else if (freq == 'MONTHLY') {
	var mode = $('input.edit-recurrence-monthly-mode:checked').val(), bymonday = [];
	if (mode == 'BYMONTHDAY') {
	$('input.edit-recurrence-monthly-bymonthday:checked').each(function(){ bymonday.push(this.value); });
	if (bymonday.length)
	data.recurrence.BYMONTHDAY = bymonday.join(',');
	}
	else
	data.recurrence.BYDAY = $('#edit-recurrence-monthly-prefix').val() + $('#edit-recurrence-monthly-byday').val();
	}
	else if (freq == 'YEARLY') {
	var byday, bymonth = [];
	$('input.edit-recurrence-yearly-bymonth:checked').each(function(){ bymonth.push(this.value); });
	if (bymonth.length)
	data.recurrence.BYMONTH = bymonth.join(',');
	if ((byday = $('#edit-recurrence-yearly-byday').val()))
	data.recurrence.BYDAY = $('#edit-recurrence-yearly-prefix').val() + byday;
	}
	}

	data.calendar = calendars.val();

	if (event.id) {
	data.id = event.id;
	if (event.recurrence)
	data._savemode = $('input.edit-recurring-savemode:checked').val();
	if (data.calendar && data.calendar != event.calendar)
	data._fromcalendar = event.calendar;
	}

	update_event(action, data);
	$dialog.dialog("close");
	};

	if (event.id) {
	buttons[rcmail.gettext('remove', 'calendar')] = function() {
	me.delete_event(event);
	$dialog.dialog('close');
	};
	}

	buttons[rcmail.gettext('cancel', 'calendar')] = function() {
	$dialog.dialog("close");
	};

	// show/hide tabs according to calendar's feature support
	$('#edit-tab-attendees')[(calendar.attendees?'show':'hide')]();
	$('#edit-tab-attachments')[(calendar.attachments?'show':'hide')]();

	// activate the first tab
	$('#eventtabs').tabs('select', 0);

	// hack: set task to 'calendar' to make all dialog actions work correctly
	var comm_path_before = rcmail.env.comm_path;
	rcmail.env.comm_path = comm_path_before.replace(/_task=[a-z]+/, '_task=calendar');

	var editform = $("#eventedit");

	// open jquery UI dialog
	$dialog.dialog({
	modal: true,
	resizable: (!bw.ie6 && !bw.ie7), // disable for performance reasons
	closeOnEscape: false,
	title: rcmail.gettext((action == 'edit' ? 'edit_event' : 'new_event'), 'calendar'),
	close: function() {
	editform.hide().appendTo(document.body);
	$dialog.dialog("destroy").remove();
	rcmail.ksearch_blur();
	rcmail.ksearch_destroy();
	freebusy_data = {};
	rcmail.env.comm_path = comm_path_before; // restore comm_path
	},
	buttons: buttons,
	minWidth: 500,
	width: 580
	}).append(editform.show()); // adding form content AFTERWARDS massively speeds up opening on IE6

	// set dialog size according to form content
	me.dialog_resize($dialog.get(0), editform.height() + (bw.ie ? 20 : 0), 530);

	title.select();

	// init other tabs asynchronously
	window.setTimeout(load_recurrence_tab, exec_deferred);
	if (calendar.attendees)
	window.setTimeout(load_attendees_tab, exec_deferred);
	if (calendar.attachments)
	window.setTimeout(load_attachments_tab, exec_deferred);
	};

	// open a dialog to display detailed free-busy information and to find free slots
	var event_freebusy_dialog = function()
	{
	var $dialog = $('#eventfreebusy'),
	event = me.selected_event;

	if ($dialog.is(':ui-dialog'))
	$dialog.dialog('close');

	if (!event_attendees.length)
	return false;

	// set form elements
	var allday = $('#edit-allday').get(0);
	var duration = Math.round((event.end.getTime() - event.start.getTime()) / 1000);
	freebusy_ui.startdate = $('#schedule-startdate').val($.fullCalendar.formatDate(event.start, settings['date_format'])).data('duration', duration);
	freebusy_ui.starttime = $('#schedule-starttime').val($.fullCalendar.formatDate(event.start, settings['time_format'])).show();
	freebusy_ui.enddate = $('#schedule-enddate').val($.fullCalendar.formatDate(event.end, settings['date_format']));
	freebusy_ui.endtime = $('#schedule-endtime').val($.fullCalendar.formatDate(event.end, settings['time_format'])).show();

	if (allday.checked) {
	freebusy_ui.starttime.val("12:00").hide();
	freebusy_ui.endtime.val("13:00").hide();
	event.allDay = true;
	}

	// read attendee roles from drop-downs
	$('select.edit-attendee-role').each(function(i, elem){
	if (event_attendees[i])
	event_attendees[i].role = $(elem).val();
	});

	// render time slots
	var now = new Date(), fb_start = new Date(), fb_end = new Date();
	fb_start.setTime(event.start);
	fb_start.setHours(0); fb_start.setMinutes(0); fb_start.setSeconds(0); fb_start.setMilliseconds(0);
	fb_end.setTime(fb_start.getTime() + DAY_MS);

	freebusy_data = { required:{}, all:{} };
	freebusy_ui.loading = 1; // prevent render_freebusy_grid() to load data yet
	freebusy_ui.numdays = Math.max(allday.checked ? 14 : 1, Math.ceil(duration * 2 / 86400));
	freebusy_ui.interval = allday.checked ? 1440 : 60;
	freebusy_ui.start = fb_start;
	freebusy_ui.end = new Date(freebusy_ui.start.getTime() + DAY_MS * freebusy_ui.numdays);
	render_freebusy_grid(0);

	// render list of attendees
	freebusy_ui.attendees = {};
	var domid, dispname, data, role_html, list_html = '';
	for (var i=0; i < event_attendees.length; i++) {
	data = event_attendees[i];
	dispname = Q(data.name \|\| data.email);
	domid = String(data.email).replace(rcmail.identifier_expr, '');
	role_html = '<a class="attendee-role-toggle" id="rcmlia' + domid + '" title="' + Q(rcmail.gettext('togglerole', 'calendar')) + '"> </a>';
	list_html += '<div class="attendee ' + String(data.role).toLowerCase() + '" id="rcmli' + domid + '">' + role_html + dispname + '</div>';

	// clone attendees data for local modifications
	freebusy_ui.attendees[i] = freebusy_ui.attendees[domid] = $.extend({}, data);
	}

	// add total row
	list_html += '<div class="attendee spacer"> </div>';
	list_html += '<div class="attendee total">' + rcmail.gettext('reqallattendees','calendar') + '</div>';

	$('#schedule-attendees-list').html(list_html)
	.unbind('click.roleicons')
	.bind('click.roleicons', function(e){
	// toggle attendee status upon click on icon
	if (e.target.id && e.target.id.match(/rcmlia(.+)/)) {
	var attendee, domid = RegExp.$1, roles = [ 'REQ-PARTICIPANT', 'OPT-PARTICIPANT', 'CHAIR' ];
	if ((attendee = freebusy_ui.attendees[domid]) && attendee.role != 'ORGANIZER') {
	var req = attendee.role != 'OPT-PARTICIPANT';
	var j = $.inArray(attendee.role, roles);
	j = (j+1) % roles.length;
	attendee.role = roles[j];
	$(e.target).parent().removeClass().addClass('attendee '+String(attendee.role).toLowerCase());

	// update total display if required-status changed
	if (req != (roles[j] != 'OPT-PARTICIPANT')) {
	compute_freebusy_totals();
	update_freebusy_display(attendee.email);
	}
	}
	}

	return false;
	});

	// enable/disable buttons
	$('#shedule-find-prev').button('option', 'disabled', (fb_start.getTime() < now.getTime()));

	// dialog buttons
	var buttons = {};

	buttons[rcmail.gettext('select', 'calendar')] = function() {
	$('#edit-startdate').val(freebusy_ui.startdate.val());
	$('#edit-starttime').val(freebusy_ui.starttime.val());
	$('#edit-enddate').val(freebusy_ui.enddate.val());
	$('#edit-endtime').val(freebusy_ui.endtime.val());

	// write role changes back to main dialog
	$('select.edit-attendee-role').each(function(i, elem){
	if (event_attendees[i] && freebusy_ui.attendees[i]) {
	event_attendees[i].role = freebusy_ui.attendees[i].role;
	$(elem).val(event_attendees[i].role);
	}
	});

	if (freebusy_ui.needsupdate)
	update_freebusy_status(me.selected_event);
	freebusy_ui.needsupdate = false;
	$dialog.dialog("close");
	};

	buttons[rcmail.gettext('cancel', 'calendar')] = function() {
	$dialog.dialog("close");
	};

	$dialog.dialog({
	modal: true,
	resizable: true,
	closeOnEscape: (!bw.ie6 && !bw.ie7),
	title: rcmail.gettext('scheduletime', 'calendar'),
	open: function() {
	$dialog.parent().find('.ui-dialog-buttonset .ui-button').first().focus();
	},
	close: function() {
	if (bw.ie6)
	$("#edit-attendees-table").css('visibility','visible');
	$dialog.dialog("destroy").hide();
	},
	resizeStop: function() {
	render_freebusy_overlay();
	},
	buttons: buttons,
	minWidth: 640,
	width: 850
	}).show();

	// hide edit dialog on IE6 because of drop-down elements
	if (bw.ie6)
	$("#edit-attendees-table").css('visibility','hidden');

	// adjust dialog size to fit grid without scrolling
	var gridw = $('#schedule-freebusy-times').width();
	var overflow = gridw - $('#attendees-freebusy-table td.times').width() + 1;
	me.dialog_resize($dialog.get(0), $dialog.height() + (bw.ie ? 20 : 0), 800 + Math.max(0, overflow));

	// fetch data from server
	freebusy_ui.loading = 0;
	load_freebusy_data(freebusy_ui.start, freebusy_ui.interval);
	};

	// render an HTML table showing free-busy status for all the event attendees
	var render_freebusy_grid = function(delta)
	{
	if (delta) {
	freebusy_ui.start.setTime(freebusy_ui.start.getTime() + DAY_MS * delta);
	fix_date(freebusy_ui.start);

	// skip weekends if in workinhoursonly-mode
	if (Math.abs(delta) == 1 && freebusy_ui.workinhoursonly) {
	while (is_weekend(freebusy_ui.start))
	freebusy_ui.start.setTime(freebusy_ui.start.getTime() + DAY_MS * delta);
	fix_date(freebusy_ui.start);
	}

	freebusy_ui.end = new Date(freebusy_ui.start.getTime() + DAY_MS * freebusy_ui.numdays);
	}

	var dayslots = Math.floor(1440 / freebusy_ui.interval);
	var date_format = 'ddd '+ (dayslots <= 2 ? settings.date_short : settings.date_format);
	var lastdate, datestr, css,
	curdate = new Date(),
	allday = (freebusy_ui.interval == 1440),
	times_css = (allday ? 'allday ' : ''),
	dates_row = '<tr class="dates">',
	times_row = '<tr class="times">',
	slots_row = '';
	for (var s = 0, t = freebusy_ui.start.getTime(); t < freebusy_ui.end.getTime(); s++) {
	curdate.setTime(t);
	datestr = fc.fullCalendar('formatDate', curdate, date_format);
	if (datestr != lastdate) {
	if (lastdate && !allday) break;
	dates_row += '<th colspan="' + dayslots + '" class="boxtitle date' + $.fullCalendar.formatDate(curdate, 'ddMMyyyy') + '">' + Q(datestr) + '</th>';
	lastdate = datestr;
	}

	// set css class according to working hours
	css = is_weekend(curdate) \|\| (freebusy_ui.interval <= 60 && !is_workinghour(curdate)) ? 'offhours' : 'workinghours';
	times_row += '<td class="' + times_css + css + '" id="t-' + Math.floor(t/1000) + '">' + Q(allday ? rcmail.gettext('all-day','calendar') : $.fullCalendar.formatDate(curdate, settings['time_format'])) + '</td>';
	slots_row += '<td class="' + css + ' unknown"> </td>';

	t += freebusy_ui.interval * 60000;
	}
	dates_row += '</tr>';
	times_row += '</tr>';

	// render list of attendees
	var domid, data, list_html = '', times_html = '';
	for (var i=0; i < event_attendees.length; i++) {
	data = event_attendees[i];
	domid = String(data.email).replace(rcmail.identifier_expr, '');
	times_html += '<tr id="fbrow' + domid + '">' + slots_row + '</tr>';
	}

	// add line for all/required attendees
	times_html += '<tr class="spacer"><td colspan="' + (dayslots * freebusy_ui.numdays) + '"> </td>';
	times_html += '<tr id="fbrowall">' + slots_row + '</tr>';

	var table = $('#schedule-freebusy-times');
	table.children('thead').html(dates_row + times_row);
	table.children('tbody').html(times_html);

	// initialize event handlers on grid
	if (!freebusy_ui.grid_events) {
	freebusy_ui.grid_events = true;
	table.children('thead').click(function(e){
	// move event to the clicked date/time
	if (e.target.id && e.target.id.match(/t-(\d+)/)) {
	var newstart = new Date(RegExp.$1 * 1000);
	// set time to 00:00
	if (me.selected_event.allDay) {
	newstart.setMinutes(0);
	newstart.setHours(0);
	}
	update_freebusy_dates(newstart, new Date(newstart.getTime() + freebusy_ui.startdate.data('duration') * 1000));
	render_freebusy_overlay();
	}
	})
	}

	// if we have loaded free-busy data, show it
	if (!freebusy_ui.loading) {
	if (freebusy_ui.start < freebusy_data.start \|\| freebusy_ui.end > freebusy_data.end \|\| freebusy_ui.interval != freebusy_data.interval) {
	load_freebusy_data(freebusy_ui.start, freebusy_ui.interval);
	}
	else {
	for (var email, i=0; i < event_attendees.length; i++) {
	if ((email = event_attendees[i].email))
	update_freebusy_display(email);
	}
	}
	}

	// render current event date/time selection over grid table
	// use timeout to let the dom attributes (width/height/offset) be set first
	window.setTimeout(function(){ render_freebusy_overlay(); }, 10);
	};

	// render overlay element over the grid to visiualize the current event date/time
	var render_freebusy_overlay = function()
	{
	var overlay = $('#schedule-event-time');
	if (me.selected_event.end.getTime() <= freebusy_ui.start.getTime() \|\| me.selected_event.start.getTime() >= freebusy_ui.end.getTime()) {
	overlay.hide();
	if (overlay.data('isdraggable'))
	overlay.draggable('disable');
	}
	else {
	var table = $('#schedule-freebusy-times'),
	width = 0,
	pos = { top:table.children('thead').height(), left:0 },
	eventstart = date2unixtime(clone_date(me.selected_event.start, me.selected_event.allDay?1:0)),
	eventend = date2unixtime(clone_date(me.selected_event.end, me.selected_event.allDay?2:0)) - 60,
	slotstart = date2unixtime(freebusy_ui.start),
	slotsize = freebusy_ui.interval * 60,
	slotend, fraction, $cell;

	// iterate through slots to determine position and size of the overlay
	table.children('thead').find('td').each(function(i, cell){
	slotend = slotstart + slotsize - 1;
	// event starts in this slot: compute left
	if (eventstart >= slotstart && eventstart <= slotend) {
	fraction = 1 - (slotend - eventstart) / slotsize;
	pos.left = Math.round(cell.offsetLeft + cell.offsetWidth * fraction);
	}
	// event ends in this slot: compute width
	if (eventend >= slotstart && eventend <= slotend) {
	fraction = 1 - (slotend - eventend) / slotsize;
	width = Math.round(cell.offsetLeft + cell.offsetWidth * fraction) - pos.left;
	}

	slotstart = slotstart + slotsize;
	});

	if (!width)
	width = table.width() - pos.left;

	// overlay is visible
	if (width > 0) {
	overlay.css({ width: (width-5)+'px', height:(table.children('tbody').height() - 4)+'px', left:pos.left+'px', top:pos.top+'px' }).show();

	// configure draggable
	if (!overlay.data('isdraggable')) {
	overlay.draggable({
	axis: 'x',
	scroll: true,
	stop: function(e, ui){
	// convert pixels to time
	var px = ui.position.left;
	var range_p = $('#schedule-freebusy-times').width();
	var range_t = freebusy_ui.end.getTime() - freebusy_ui.start.getTime();
	var newstart = new Date(freebusy_ui.start.getTime() + px * (range_t / range_p));
	newstart.setSeconds(0); newstart.setMilliseconds(0);
	// snap to day boundaries
	if (me.selected_event.allDay) {
	if (newstart.getHours() >= 12) // snap to next day
	newstart.setTime(newstart.getTime() + DAY_MS);
	newstart.setMinutes(0);
	newstart.setHours(0);
	}
	else {
	// round to 5 minutes
	var round = newstart.getMinutes() % 5;
	if (round > 2.5) newstart.setTime(newstart.getTime() + (5 - round) * 60000);
	else if (round > 0) newstart.setTime(newstart.getTime() - round * 60000);
	}
	// update event times and display
	update_freebusy_dates(newstart, new Date(newstart.getTime() + freebusy_ui.startdate.data('duration') * 1000));
	if (me.selected_event.allDay)
	render_freebusy_overlay();
	}
	}).data('isdraggable', true);
	}
	else
	overlay.draggable('enable');
	}
	else
	overlay.draggable('disable').hide();
	}

	};


	// fetch free-busy information for each attendee from server
	var load_freebusy_data = function(from, interval)
	{
	var start = new Date(from.getTime() - DAY_MS * 2); // start 2 days before event
	fix_date(start);
	var end = new Date(start.getTime() + DAY_MS * Math.max(14, freebusy_ui.numdays + 7)); // load min. 14 days
	freebusy_ui.numrequired = 0;
	freebusy_data.all = [];
	freebusy_data.required = [];

	// load free-busy information for every attendee
	var domid, email;
	for (var i=0; i < event_attendees.length; i++) {
	if ((email = event_attendees[i].email)) {
	domid = String(email).replace(rcmail.identifier_expr, '');
	$('#rcmli' + domid).addClass('loading');
	freebusy_ui.loading++;

	$.ajax({
	type: 'GET',
	dataType: 'json',
	url: rcmail.url('freebusy-times'),
	data: { email:email, start:date2servertime(clone_date(start, 1)), end:date2servertime(clone_date(end, 2)), interval:interval, _remote:1 },
	success: function(data) {
	freebusy_ui.loading--;

	// find attendee
	var attendee = null;
	for (var i=0; i < event_attendees.length; i++) {
	if (freebusy_ui.attendees[i].email == data.email) {
	attendee = freebusy_ui.attendees[i];
	break;
	}
	}

	// copy data to member var
	var ts, req = attendee.role != 'OPT-PARTICIPANT';
	freebusy_data.start = parseISO8601(data.start);
	freebusy_data[data.email] = {};
	for (var i=0; i < data.slots.length; i++) {
	ts = data.times[i] + '';
	freebusy_data[data.email][ts] = data.slots[i];

	// set totals
	if (!freebusy_data.required[ts])
	freebusy_data.required[ts] = [0,0,0,0];
	if (req)
	freebusy_data.required[ts][data.slots[i]]++;

	if (!freebusy_data.all[ts])
	freebusy_data.all[ts] = [0,0,0,0];
	freebusy_data.all[ts][data.slots[i]]++;
	}
	freebusy_data.end = parseISO8601(data.end);
	freebusy_data.interval = data.interval;

	// hide loading indicator
	var domid = String(data.email).replace(rcmail.identifier_expr, '');
	$('#rcmli' + domid).removeClass('loading');

	// update display
	update_freebusy_display(data.email);
	}
	});

	// count required attendees
	if (freebusy_ui.attendees[i].role != 'OPT-PARTICIPANT')
	freebusy_ui.numrequired++;
	}
	}
	};

	// re-calculate total status after role change
	var compute_freebusy_totals = function()
	{
	freebusy_ui.numrequired = 0;
	freebusy_data.all = [];
	freebusy_data.required = [];

	var email, req, status;
	for (var i=0; i < event_attendees.length; i++) {
	if (!(email = event_attendees[i].email))
	continue;

	req = freebusy_ui.attendees[i].role != 'OPT-PARTICIPANT';
	if (req)
	freebusy_ui.numrequired++;

	for (var ts in freebusy_data[email]) {
	if (!freebusy_data.required[ts])
	freebusy_data.required[ts] = [0,0,0,0];
	if (!freebusy_data.all[ts])
	freebusy_data.all[ts] = [0,0,0,0];

	status = freebusy_data[email][ts];
	freebusy_data.all[ts][status]++;

	if (req)
	freebusy_data.required[ts][status]++;
	}
	}
	};

	// update free-busy grid with status loaded from server
	var update_freebusy_display = function(email)
	{
	var status_classes = ['unknown','free','busy','tentative','out-of-office'];
	var domid = String(email).replace(rcmail.identifier_expr, '');
	var row = $('#fbrow' + domid);
	var rowall = $('#fbrowall').children();
	var dateonly = freebusy_ui.interval > 60,
	t, ts = date2timestring(freebusy_ui.start, dateonly),
	curdate = new Date(),
	fbdata = freebusy_data[email];

	if (fbdata && fbdata[ts] !== undefined && row.length) {
	t = freebusy_ui.start.getTime();
	row.children().each(function(i, cell){
	curdate.setTime(t);
	ts = date2timestring(curdate, dateonly);
	cell.className = cell.className.replace('unknown', fbdata[ts] ? status_classes[fbdata[ts]] : 'unknown');

	// also update total row if all data was loaded
	if (freebusy_ui.loading == 0 && freebusy_data.all[ts] && (cell = rowall.get(i))) {
	var workinghours = cell.className.indexOf('workinghours') >= 0;
	var all_status = freebusy_data.all[ts][2] ? 'busy' : 'unknown';
	req_status = freebusy_data.required[ts][2] ? 'busy' : 'free';
	for (var j=1; j < status_classes.length; j++) {
	if (freebusy_ui.numrequired && freebusy_data.required[ts][j] >= freebusy_ui.numrequired)
	req_status = status_classes[j];
	if (freebusy_data.all[ts][j] == event_attendees.length)
	all_status = status_classes[j];
	}

	cell.className = (workinghours ? 'workinghours ' : 'offhours ') + req_status + ' all-' + all_status;
	}

	t += freebusy_ui.interval * 60000;
	});
	}
	};

	// write changed event date/times back to form fields
	var update_freebusy_dates = function(start, end)
	{
	// fix all-day evebt times
	if (me.selected_event.allDay) {
	var numdays = Math.floor((me.selected_event.end.getTime() - me.selected_event.start.getTime()) / DAY_MS);
	start.setHours(12);
	start.setMinutes(0);
	end.setTime(start.getTime() + numdays * DAY_MS);
	end.setHours(13);
	end.setMinutes(0);
	}
	me.selected_event.start = start;
	me.selected_event.end = end;
	freebusy_ui.startdate.val($.fullCalendar.formatDate(start, settings['date_format']));
	freebusy_ui.starttime.val($.fullCalendar.formatDate(start, settings['time_format']));
	freebusy_ui.enddate.val($.fullCalendar.formatDate(end, settings['date_format']));
	freebusy_ui.endtime.val($.fullCalendar.formatDate(end, settings['time_format']));
	freebusy_ui.needsupdate = true;
	};

	// attempt to find a time slot where all attemdees are available
	var freebusy_find_slot = function(dir)
	{
	// exit if free-busy data isn't available yet
	if (!freebusy_data \|\| !freebusy_data.start)
	return false;

	var event = me.selected_event,
	eventstart = clone_date(event.start, event.allDay ? 1 : 0).getTime(), // calculate with integers
	eventend = clone_date(event.end, event.allDay ? 2 : 0).getTime(),
	duration = eventend - eventstart - (event.allDay ? HOUR_MS : 0), // make sure we don't cross day borders on DST change
	sinterval = freebusy_data.interval * 60000,
	intvlslots = 1,
	numslots = Math.ceil(duration / sinterval),
	checkdate, slotend, email, ts, slot, slotdate = new Date();

	// shift event times to next possible slot
	eventstart += sinterval * intvlslots * dir;
	eventend += sinterval * intvlslots * dir;

	// iterate through free-busy slots and find candidates
	var candidatecount = 0, candidatestart = candidateend = success = false;
	for (slot = dir > 0 ? freebusy_data.start.getTime() : freebusy_data.end.getTime() - sinterval;
	(dir > 0 && slot < freebusy_data.end.getTime()) \|\| (dir < 0 && slot >= freebusy_data.start.getTime());
	slot += sinterval * dir) {
	slotdate.setTime(slot);
	// fix slot if just crossed a DST change
	if (event.allDay) {
	fix_date(slotdate);
	slot = slotdate.getTime();
	}
	slotend = slot + sinterval;

	if ((dir > 0 && slotend <= eventstart) \|\| (dir < 0 && slot >= eventend)) // skip
	continue;

	// respect workingours setting
	if (freebusy_ui.workinhoursonly) {
	if (is_weekend(slotdate) \|\| (freebusy_data.interval <= 60 && !is_workinghour(slotdate))) { // skip off-hours
	candidatestart = candidateend = false;
	candidatecount = 0;
	continue;
	}
	}

	if (!candidatestart)
	candidatestart = slot;

	// check freebusy data for all attendees
	ts = date2timestring(slotdate, freebusy_data.interval > 60);
	for (var i=0; i < event_attendees.length; i++) {
	if (freebusy_ui.attendees[i].role != 'OPT-PARTICIPANT' && (email = freebusy_ui.attendees[i].email) && freebusy_data[email] && freebusy_data[email][ts] > 1) {
	candidatestart = candidateend = false;
	break;
	}
	}

	// occupied slot
	if (!candidatestart) {
	slot += Math.max(0, intvlslots - candidatecount - 1) * sinterval * dir;
	candidatecount = 0;
	continue;
	}

	// set candidate end to slot end time
	candidatecount++;
	if (dir < 0 && !candidateend)
	candidateend = slotend;

	// if candidate is big enough, this is it!
	if (candidatecount == numslots) {
	if (dir > 0) {
	event.start.setTime(candidatestart);
	event.end.setTime(candidatestart + duration);
	}
	else {
	event.end.setTime(candidateend);
	event.start.setTime(candidateend - duration);
	}
	success = true;
	break;
	}
	}

	// update event date/time display
	if (success) {
	update_freebusy_dates(event.start, event.end);

	// move freebusy grid if necessary
	var offset = Math.ceil((event.start.getTime() - freebusy_ui.end.getTime()) / DAY_MS);
	if (event.start.getTime() >= freebusy_ui.end.getTime())
	render_freebusy_grid(Math.max(1, offset));
	else if (event.end.getTime() <= freebusy_ui.start.getTime())
	render_freebusy_grid(Math.min(-1, offset));
	else
	render_freebusy_overlay();

	var now = new Date();
	$('#shedule-find-prev').button('option', 'disabled', (event.start.getTime() < now.getTime()));
	}
	else {
	alert(rcmail.gettext('noslotfound','calendar'));
	}
	};


	// update event properties and attendees availability if event times have changed
	var event_times_changed = function()
	{
	if (me.selected_event) {
	var allday = $('#edit-allday').get(0);
	me.selected_event.allDay = allday.checked;
	me.selected_event.start = parse_datetime(allday.checked ? '12:00' : $('#edit-starttime').val(), $('#edit-startdate').val());
	me.selected_event.end = parse_datetime(allday.checked ? '13:00' : $('#edit-endtime').val(), $('#edit-enddate').val());
	if (event_attendees)
	freebusy_ui.needsupdate = true;
	$('#edit-startdate').data('duration', Math.round((me.selected_event.end.getTime() - me.selected_event.start.getTime()) / 1000));
	}
	};

	// add the given list of participants
	var add_attendees = function(names)
	{
	names = explode_quoted_string(names.replace(/,\s*$/, ''), ',');

	// parse name/email pairs
	var item, email, name, success = false;
	for (var i=0; i < names.length; i++) {
	email = name = '';
	item = $.trim(names[i]);

	if (!item.length) {
	continue;
	} // address in brackets without name (do nothing)
	else if (item.match(/^<[^@]+@[^>]+>$/)) {
	email = item.replace(/[<>]/g, '');
	} // address without brackets and without name (add brackets)
	else if (rcube_check_email(item)) {
	email = item;
	} // address with name
	else if (item.match(/([^\s<@]+@[^>]+)>*$/)) {
	email = RegExp.$1;
	name = item.replace(email, '').replace(/^["\s<>]+/, '').replace(/["\s<>]+$/, '');
	}

	if (email) {
	add_attendee({ email:email, name:name, role:'REQ-PARTICIPANT', status:'NEEDS-ACTION' });
	success = true;
	}
	else {
	alert(rcmail.gettext('noemailwarning'));
	}
	}

	return success;
	};

	// add the given attendee to the list
	var add_attendee = function(data, readonly)
	{
	// check for dupes...
	var exists = false;
	$.each(event_attendees, function(i, v){ exists \|= (v.email == data.email); });
	if (exists)
	return false;

	var dispname = Q(data.name \|\| data.email);
	if (data.email)
	dispname = '<a href="mailto:' + data.email + '" title="' + Q(data.email) + '" class="mailtolink">' + dispname + '</a>';

	// role selection
	var organizer = data.role == 'ORGANIZER';
	var opts = {};
	if (organizer)
	opts.ORGANIZER = rcmail.gettext('calendar.roleorganizer');
	opts['REQ-PARTICIPANT'] = rcmail.gettext('calendar.rolerequired');
	opts['OPT-PARTICIPANT'] = rcmail.gettext('calendar.roleoptional');
	opts['CHAIR'] = rcmail.gettext('calendar.rolechair');

	if (organizer && !readonly)
	dispname = rcmail.env['identities-selector'];

	var select = '<select class="edit-attendee-role"' + (organizer \|\| readonly ? ' disabled="true"' : '') + '>';
	for (var r in opts)
	select += '<option value="'+ r +'" class="' + r.toLowerCase() + '"' + (data.role == r ? ' selected="selected"' : '') +'>' + Q(opts[r]) + '</option>';
	select += '</select>';

	// availability
	var avail = data.email ? 'loading' : 'unknown';

	// delete icon
	var icon = rcmail.env.deleteicon ? '<img src="' + rcmail.env.deleteicon + '" alt="" />' : rcmail.gettext('delete');
	var dellink = '<a href="#delete" class="iconlink delete deletelink" title="' + Q(rcmail.gettext('delete')) + '">' + icon + '</a>';

	var html = '<td class="role">' + select + '</td>' +
	'<td class="name">' + dispname + '</td>' +
	'<td class="availability"><img src="./program/resources/blank.gif" class="availabilityicon ' + avail + '" /></td>' +
	'<td class="confirmstate"><span class="' + String(data.status).toLowerCase() + '">' + Q(data.status) + '</span></td>' +
	'<td class="options">' + (organizer \|\| readonly ? '' : dellink) + '</td>';

	var tr = $('<tr>')
	.addClass(String(data.role).toLowerCase())
	.html(html)
	.appendTo(attendees_list);

	tr.find('a.deletelink').click({ id:(data.email \|\| data.name) }, function(e) { remove_attendee(this, e.data.id); return false; });
	tr.find('a.mailtolink').click(function(e) { rcmail.redirect(rcmail.url('mail/compose', { _to:this.href.substr(7) })); return false; });

	// select organizer identity
	if (data.identity_id)
	$('#edit-identities-list').val(data.identity_id);

	// check free-busy status
	if (avail == 'loading') {
	check_freebusy_status(tr.find('img.availabilityicon'), data.email, me.selected_event);
	}

	event_attendees.push(data);
	};

	// iterate over all attendees and update their free-busy status display
	var update_freebusy_status = function(event)
	{
	var icons = attendees_list.find('img.availabilityicon');
	for (var i=0; i < event_attendees.length; i++) {
	if (icons.get(i) && event_attendees[i].email)
	check_freebusy_status(icons.get(i), event_attendees[i].email, event);
	}

	freebusy_ui.needsupdate = false;
	};

	// load free-busy status from server and update icon accordingly
	var check_freebusy_status = function(icon, email, event)
	{
	var calendar = event.calendar && me.calendars[event.calendar] ? me.calendars[event.calendar] : { freebusy:false };
	if (!calendar.freebusy) {
	$(icon).removeClass().addClass('availabilityicon unknown');
	return;
	}

	icon = $(icon).removeClass().addClass('availabilityicon loading');

	$.ajax({
	type: 'GET',
	dataType: 'html',
	url: rcmail.url('freebusy-status'),
	data: { email:email, start:date2servertime(clone_date(event.start, event.allDay?1:0)), end:date2servertime(clone_date(event.end, event.allDay?2:0)), _remote: 1 },
	success: function(status){
	icon.removeClass('loading').addClass(String(status).toLowerCase());
	},
	error: function(){
	icon.removeClass('loading').addClass('unknown');
	}
	});
	};

	// remove an attendee from the list
	var remove_attendee = function(elem, id)
	{
	$(elem).closest('tr').remove();
	event_attendees = $.grep(event_attendees, function(data){ return (data.name != id && data.email != id) });
	};

	// when the user accepts or declines an event invitation
	var event_rsvp = function(response)
	{
	if (me.selected_event && me.selected_event.attendees && response) {
	// update attendee status
	for (var data, i=0; i < me.selected_event.attendees.length; i++) {
	data = me.selected_event.attendees[i];
	if (settings.identity.emails.indexOf(';'+String(data.email).toLowerCase()) >= 0)
	data.status = response.toUpperCase();
	}
	event_show_dialog(me.selected_event);

	// submit status change to server
	me.saving_lock = rcmail.set_busy(true, 'calendar.savingdata');
	rcmail.http_post('event', { action:'rsvp', e:me.selected_event, status:response });
	}
	}

	// post the given event data to server
	var update_event = function(action, data)
	{
	me.saving_lock = rcmail.set_busy(true, 'calendar.savingdata');
	rcmail.http_post('calendar/event', { action:action, e:data });

	// render event temporarily into the calendar
	if ((data.start && data.end) \|\| data.id) {
	var event = data.id ? $.extend(fc.fullCalendar('clientEvents', function(e){ return e.id == data.id; })[0], data) : data;
	if (data.start)
	event.start = data.start;
	if (data.end)
	event.end = data.end;
	if (data.allday !== undefined)
	event.allDay = data.allday;
	event.editable = false;
	event.temp = true;
	event.className = 'fc-event-cal-'+data.calendar+' fc-event-temp';
	fc.fullCalendar(data.id ? 'updateEvent' : 'renderEvent', event);
	}
	};

	// mouse-click handler to check if the show dialog is still open and prevent default action
	var dialog_check = function(e)
	{
	var showd = $("#eventshow");
	if (showd.is(':visible') && !$(e.target).closest('.ui-dialog').length) {
	showd.dialog('close');
	e.stopImmediatePropagation();
	ignore_click = true;
	return false;
	}
	else if (ignore_click) {
	window.setTimeout(function(){ ignore_click = false; }, 20);
	return false;
	}
	return true;
	};

	// display confirm dialog when modifying/deleting an event
	var update_event_confirm = function(action, event, data)
	{
	if (!data) data = event;
	var decline = false, notify = false, html = '', cal = me.calendars[event.calendar];

	// event has attendees, ask whether to notify them
	if (has_attendees(event)) {
	if (is_organizer(event)) {
	notify = true;
	html += '<div class="message">' +
	'<label><input class="confirm-attendees-donotify" type="checkbox" checked="checked" value="1" name="notify" /> ' +
	rcmail.gettext((action == 'remove' ? 'sendcancellation' : 'sendnotifications'), 'calendar') +
	'</label></div>';
	}
	else if (action == 'remove' && is_attendee(event)) {
	decline = true;
	html += '<div class="message">' +
	'<label><input class="confirm-attendees-decline" type="checkbox" checked="checked" value="1" name="decline" /> ' +
	rcmail.gettext('itipdeclineevent', 'calendar') +
	'</label></div>';
	}
	else {
	html += '<div class="message">' + rcmail.gettext('localchangeswarning', 'calendar') + '</div>';
	}
	}

	// recurring event: user needs to select the savemode
	if (event.recurrence) {
	html += '<div class="message"><span class="ui-icon ui-icon-alert"></span>' +
	rcmail.gettext((action == 'remove' ? 'removerecurringeventwarning' : 'changerecurringeventwarning'), 'calendar') + '</div>' +
	'<div class="savemode">' +
	'<a href="#current" class="button">' + rcmail.gettext('currentevent', 'calendar') + '</a>' +
	'<a href="#future" class="button">' + rcmail.gettext('futurevents', 'calendar') + '</a>' +
	'<a href="#all" class="button">' + rcmail.gettext('allevents', 'calendar') + '</a>' +
	(action != 'remove' ? '<a href="#new" class="button">' + rcmail.gettext('saveasnew', 'calendar') + '</a>' : '') +
	'</div>';
	}

	// show dialog
	if (html) {
	var $dialog = $('<div>').html(html);

	$dialog.find('a.button').button().click(function(e){
	data._savemode = String(this.href).replace(/.+#/, '');
	if ($dialog.find('input.confirm-attendees-donotify').get(0))
	data._notify = notify && $dialog.find('input.confirm-attendees-donotify').get(0).checked ? 1 : 0;
	if (decline && $dialog.find('input.confirm-attendees-decline:checked'))
	data.decline = 1;
	update_event(action, data);
	$dialog.dialog("destroy").hide();
	return false;
	});

	var buttons = [{
	text: rcmail.gettext('cancel', 'calendar'),
	click: function() {
	$(this).dialog("close");
	}
	}];

	if (!event.recurrence) {
	buttons.push({
	text: rcmail.gettext((action == 'remove' ? 'remove' : 'save'), 'calendar'),
	click: function() {
	data._notify = notify && $dialog.find('input.confirm-attendees-donotify').get(0).checked ? 1 : 0;
	data.decline = decline && $dialog.find('input.confirm-attendees-decline:checked').length ? 1 : 0;
	update_event(action, data);
	$(this).dialog("close");
	}
	});
	}

	$dialog.dialog({
	modal: true,
	width: 460,
	dialogClass: 'warning',
	title: rcmail.gettext((action == 'remove' ? 'removeeventconfirm' : 'changeeventconfirm'), 'calendar'),
	buttons: buttons,
	close: function(){
	$dialog.dialog("destroy").hide();
	if (!rcmail.busy)
	fc.fullCalendar('refetchEvents');
	}
	}).addClass('event-update-confirm').show();

	return false;
	}
	// show regular confirm box when deleting
	else if (action == 'remove' && !cal.undelete) {
	if (!confirm(rcmail.gettext('deleteventconfirm', 'calendar')))
	return false;
	}

	// do update
	update_event(action, data);

	return true;
	};

	var update_agenda_toolbar = function()
	{
	$('#agenda-listrange').val(fc.fullCalendar('option', 'listRange'));
	$('#agenda-listsections').val(fc.fullCalendar('option', 'listSections'));
	}

	/* fullcalendar event handlers */

	var fc_event_render = function(event, element, view) {
	if (view.name != 'list' && view.name != 'table') {
	var prefix = event.sensitivity != 0 ? String(sensitivitylabels[event.sensitivity]).toUpperCase()+': ' : '';
	element.attr('title', prefix + event.title);
	}
	if (view.name != 'month') {
	if (event.location) {
	element.find('div.fc-event-title').after('<div class="fc-event-location">@ ' + Q(event.location) + '</div>');
	}
	if (event.sensitivity != 0)
	element.find('div.fc-event-time').append('<i class="fc-icon-sensitive"></i>');
	if (event.recurrence)
	element.find('div.fc-event-time').append('<i class="fc-icon-recurring"></i>');
	if (event.alarms)
	element.find('div.fc-event-time').append('<i class="fc-icon-alarms"></i>');
	}
	};


	/* public methods */

	/**
	* Remove saving lock and free the UI for new input
	*/
	this.unlock_saving = function()
	{
	if (me.saving_lock)
	rcmail.set_busy(false, null, me.saving_lock);
	};

	// opens calendar day-view in a popup
	this.fisheye_view = function(date)
	{
	$('#fish-eye-view:ui-dialog').dialog('close');

	// create list of active event sources
	var src, cals = {}, sources = [];
	for (var id in this.calendars) {
	src = $.extend({}, this.calendars[id]);
	src.editable = false;
	src.url = null;
	src.events = [];

	if (src.active) {
	cals[id] = src;
	sources.push(src);
	}
	}

	// copy events already loaded
	var events = fc.fullCalendar('clientEvents');
	for (var event, i=0; i< events.length; i++) {
	event = events[i];
	if (event.source && (src = cals[event.source.id])) {
	src.events.push(event);
	}
	}

	var h = $(window).height() - 50;
	var dialog = $('<div>')
	.attr('id', 'fish-eye-view')
	.dialog({
	modal: true,
	width: 680,
	height: h,
	title: $.fullCalendar.formatDate(date, 'dddd ' + settings['date_long']),
	close: function(){
	dialog.dialog("destroy");
	me.fisheye_date = null;
	}
	})
	.fullCalendar({
	header: { left: '', center: '', right: '' },
	height: h - 50,
	defaultView: 'agendaDay',
	date: date.getDate(),
	month: date.getMonth(),
	year: date.getFullYear(),
	ignoreTimezone: true, // will treat the given date strings as in local (browser's) timezone
	eventSources: sources,
	monthNames : settings['months'],
	monthNamesShort : settings['months_short'],
	dayNames : settings['days'],
	dayNamesShort : settings['days_short'],
	firstDay : settings['first_day'],
	firstHour : settings['first_hour'],
	slotMinutes : 60/settings['timeslots'],
	timeFormat: { '': settings['time_format'] },
	axisFormat : settings['time_format'],
	columnFormat: { day: 'dddd ' + settings['date_short'] },
	titleFormat: { day: 'dddd ' + settings['date_long'] },
	allDayText: rcmail.gettext('all-day', 'calendar'),
	currentTimeIndicator: settings.time_indicator,
	eventRender: fc_event_render,
	eventClick: function(event) {
	event_show_dialog(event);
	}
	});

	this.fisheye_date = date;
	};

	//public method to show the print dialog.
	this.print_calendars = function(view)
	{
	if (!view) view = fc.fullCalendar('getView').name;
	var date = fc.fullCalendar('getDate') \|\| new Date();
	var range = fc.fullCalendar('option', 'listRange');
	var sections = fc.fullCalendar('option', 'listSections');
	- var printwin = window.open(rcmail.url('print', { view: view, date: date2unixtime(date), range: range, sections: sections, search: this.search_query }), "rc_print_calendars", "toolbar=no,location=yes,menubar=yes,resizable=yes,scrollbars=yes,width=800");
	- window.setTimeout(function(){ printwin.focus() }, 50);
	+ rcmail.open_window(rcmail.url('print', { view: view, date: date2unixtime(date), range: range, sections: sections, search: this.search_query }), true, true);
	};

	// public method to bring up the new event dialog
	this.add_event = function(templ) {
	if (this.selected_calendar) {
	var now = new Date();
	var date = fc.fullCalendar('getDate');
	if (typeof date != 'Date')
	date = now;
	date.setHours(now.getHours()+1);
	date.setMinutes(0);
	var end = new Date(date.getTime());
	end.setHours(date.getHours()+1);
	event_edit_dialog('new', $.extend({ start:date, end:end, allDay:false, calendar:this.selected_calendar }, templ \|\| {}));
	}
	};

	// delete the given event after showing a confirmation dialog
	this.delete_event = function(event) {
	// show confirm dialog for recurring events, use jquery UI dialog
	return update_event_confirm('remove', event, { id:event.id, calendar:event.calendar, attendees:event.attendees });
	};

	// opens a jquery UI dialog with event properties (or empty for creating a new calendar)
	this.calendar_edit_dialog = function(calendar)
	{
	// close show dialog first
	var $dialog = $("#calendarform");
	if ($dialog.is(':ui-dialog'))
	$dialog.dialog('close');

	if (!calendar)
	calendar = { name:'', color:'cc0000', editable:true, showalarms:true };

	var form, name, color, alarms;

	$dialog.html(rcmail.get_label('loading'));
	$.ajax({
	type: 'GET',
	dataType: 'html',
	url: rcmail.url('calendar'),
	data: { action:(calendar.id ? 'form-edit' : 'form-new'), c:{ id:calendar.id } },
	success: function(data) {
	$dialog.html(data);
	// resize and reposition dialog window
	form = $('#calendarpropform');
	me.dialog_resize('#calendarform', form.height(), form.width());
	name = $('#calendar-name').prop('disabled', !calendar.editable).val(calendar.editname \|\| calendar.name);
	color = $('#calendar-color').val(calendar.color).miniColors({ value: calendar.color, colorValues:rcmail.env.mscolors });
	alarms = $('#calendar-showalarms').prop('checked', calendar.showalarms).get(0);
	name.select();
	}
	});

	// dialog buttons
	var buttons = {};

	buttons[rcmail.gettext('save', 'calendar')] = function() {
	// form is not loaded
	if (!form \|\| !form.length)
	return;

	// TODO: do some input validation
	if (!name.val() \|\| name.val().length < 2) {
	alert(rcmail.gettext('invalidcalendarproperties', 'calendar'));
	name.select();
	return;
	}

	// post data to server
	var data = form.serializeJSON();
	if (data.color)
	data.color = data.color.replace(/^#/, '');
	if (calendar.id)
	data.id = calendar.id;
	if (alarms)
	data.showalarms = alarms.checked ? 1 : 0;

	me.saving_lock = rcmail.set_busy(true, 'calendar.savingdata');
	rcmail.http_post('calendar', { action:(calendar.id ? 'edit' : 'new'), c:data });
	$dialog.dialog("close");
	};

	buttons[rcmail.gettext('cancel', 'calendar')] = function() {
	$dialog.dialog("close");
	};

	// open jquery UI dialog
	$dialog.dialog({
	modal: true,
	resizable: true,
	closeOnEscape: false,
	title: rcmail.gettext((calendar.id ? 'editcalendar' : 'createcalendar'), 'calendar'),
	close: function() {
	$dialog.html('').dialog("destroy").hide();
	},
	buttons: buttons,
	minWidth: 400,
	width: 420
	}).show();

	};

	this.calendar_remove = function(calendar)
	{
	if (confirm(rcmail.gettext('deletecalendarconfirm', 'calendar'))) {
	rcmail.http_post('calendar', { action:'remove', c:{ id:calendar.id } });
	return true;
	}
	return false;
	};

	this.calendar_destroy_source = function(id)
	{
	if (this.calendars[id]) {
	fc.fullCalendar('removeEventSource', this.calendars[id]);
	$(rcmail.get_folder_li(id, 'rcmlical')).remove();
	$('#edit-calendar option[value="'+id+'"]').remove();
	delete this.calendars[id];
	}
	};

	// open a dialog to upload an .ics file with events to be imported
	this.import_events = function(calendar)
	{
	// close show dialog first
	var $dialog = $("#eventsimport"),
	form = rcmail.gui_objects.importform;

	if ($dialog.is(':ui-dialog'))
	$dialog.dialog('close');

	$('#event-import-calendar').val(calendar.id);

	var buttons = {};
	buttons[rcmail.gettext('import', 'calendar')] = function() {
	if (form && form.elements._data.value) {
	rcmail.async_upload_form(form, 'import_events', function(e) {
	rcmail.set_busy(false, null, me.saving_lock);
	});

	// display upload indicator
	me.saving_lock = rcmail.set_busy(true, 'uploading');
	}
	};

	buttons[rcmail.gettext('cancel', 'calendar')] = function() {
	$dialog.dialog("close");
	};

	// open jquery UI dialog
	$dialog.dialog({
	modal: true,
	resizable: false,
	closeOnEscape: false,
	title: rcmail.gettext('importevents', 'calendar'),
	close: function() {
	$dialog.dialog("destroy").hide();
	},
	buttons: buttons,
	width: 520
	}).show();

	};

	// callback from server if import succeeded
	this.import_success = function(p)
	{
	$("#eventsimport:ui-dialog").dialog('close');
	rcmail.set_busy(false, null, me.saving_lock);
	rcmail.gui_objects.importform.reset();

	if (p.refetch)
	this.refresh(p);
	};

	// show URL of the given calendar in a dialog box
	this.showurl = function(calendar)
	{
	var $dialog = $('#calendarurlbox');

	if ($dialog.is(':ui-dialog'))
	$dialog.dialog('close');

	if (calendar.feedurl) {
	$dialog.dialog({
	resizable: true,
	closeOnEscape: true,
	title: rcmail.gettext('showurl', 'calendar'),
	close: function() {
	$dialog.dialog("destroy").hide();
	},
	width: 520
	}).show();

	$('#calfeedurl').val(calendar.feedurl).select();
	}
	};

	// refresh the calendar view after saving event data
	this.refresh = function(p)
	{
	var source = me.calendars[p.source];

	if (source && (p.refetch \|\| (p.update && !source.active))) {
	// activate event source if new event was added to an invisible calendar
	if (!source.active) {
	source.active = true;
	fc.fullCalendar('addEventSource', source);
	$('#' + rcmail.get_folder_li(source.id, 'rcmlical').id + ' input').prop('checked', true);
	}
	else
	fc.fullCalendar('refetchEvents', source);
	}
	// add/update single event object
	else if (source && p.update) {
	var event = p.update;
	event.temp = false;
	event.editable = source.editable;
	var existing = fc.fullCalendar('clientEvents', event._id);
	if (existing.length) {
	$.extend(existing[0], event);
	fc.fullCalendar('updateEvent', existing[0]);
	}
	else {
	event.source = source; // link with source
	fc.fullCalendar('renderEvent', event);
	}
	// refresh fish-eye view
	if (me.fisheye_date)
	me.fisheye_view(me.fisheye_date);
	}

	// remove temp events
	fc.fullCalendar('removeEvents', function(e){ return e.temp; });
	};


	/* event searching */

	// execute search
	this.quicksearch = function()
	{
	if (rcmail.gui_objects.qsearchbox) {
	var q = rcmail.gui_objects.qsearchbox.value;
	if (q != '') {
	var id = 'search-'+q;
	var sources = [];

	if (this._search_message)
	rcmail.hide_message(this._search_message);

	for (var sid in this.calendars) {
	if (this.calendars[sid]) {
	this.calendars[sid].url = this.calendars[sid].url.replace(/&q=.+/, '') + '&q='+escape(q);
	sources.push(sid);
	}
	}
	id += '@'+sources.join(',');

	// ignore if query didn't change
	if (this.search_request == id) {
	return;
	}
	// remember current view
	else if (!this.search_request) {
	this.default_view = fc.fullCalendar('getView').name;
	}

	this.search_request = id;
	this.search_query = q;

	// change to list view
	fc.fullCalendar('option', 'listSections', 'month')
	.fullCalendar('option', 'listRange', Math.max(60, settings['agenda_range']))
	.fullCalendar('changeView', 'table');

	update_agenda_toolbar();

	// refetch events with new url (if not already triggered by changeView)
	if (!this.is_loading)
	fc.fullCalendar('refetchEvents');
	}
	else // empty search input equals reset
	this.reset_quicksearch();
	}
	};

	// reset search and get back to normal event listing
	this.reset_quicksearch = function()
	{
	$(rcmail.gui_objects.qsearchbox).val('');

	if (this._search_message)
	rcmail.hide_message(this._search_message);

	if (this.search_request) {
	// hide bottom links of agenda view
	fc.find('.fc-list-content > .fc-listappend').hide();

	// restore original event sources and view mode from fullcalendar
	fc.fullCalendar('option', 'listSections', settings['agenda_sections'])
	.fullCalendar('option', 'listRange', settings['agenda_range']);

	update_agenda_toolbar();

	for (var sid in this.calendars) {
	if (this.calendars[sid])
	this.calendars[sid].url = this.calendars[sid].url.replace(/&q=.+/, '');
	}
	if (this.default_view)
	fc.fullCalendar('changeView', this.default_view);

	if (!this.is_loading)
	fc.fullCalendar('refetchEvents');

	this.search_request = this.search_query = null;
	}
	};

	// callback if all sources have been fetched from server
	this.events_loaded = function(count)
	{
	var addlinks, append = '';

	// enhance list view when searching
	if (this.search_request) {
	if (!count) {
	this._search_message = rcmail.display_message(rcmail.gettext('searchnoresults', 'calendar'), 'notice');
	append = '<div class="message">' + rcmail.gettext('searchnoresults', 'calendar') + '</div>';
	}
	append += '<div class="fc-bottomlinks formlinks"></div>';
	addlinks = true;
	}

	if (fc.fullCalendar('getView').name == 'table') {
	var container = fc.find('.fc-list-content > .fc-listappend');
	if (append) {
	if (!container.length)
	container = $('<div class="fc-listappend"></div>').appendTo(fc.find('.fc-list-content'));
	container.html(append).show();
	}
	else if (container.length)
	container.hide();

	// add links to adjust search date range
	if (addlinks) {
	var lc = container.find('.fc-bottomlinks');
	$('<a>').attr('href', '#').html(rcmail.gettext('searchearlierdates', 'calendar')).appendTo(lc).click(function(){
	fc.fullCalendar('incrementDate', 0, -1, 0);
	});
	lc.append(" ");
	$('<a>').attr('href', '#').html(rcmail.gettext('searchlaterdates', 'calendar')).appendTo(lc).click(function(){
	var range = fc.fullCalendar('option', 'listRange');
	if (range < 90) {
	fc.fullCalendar('option', 'listRange', fc.fullCalendar('option', 'listRange') + 30).fullCalendar('render');
	update_agenda_toolbar();
	}
	else
	fc.fullCalendar('incrementDate', 0, 1, 0);
	});
	}
	}

	if (this.fisheye_date)
	this.fisheye_view(this.fisheye_date);
	};

	// resize and reposition (center) the dialog window
	this.dialog_resize = function(id, height, width)
	{
	var win = $(window), w = win.width(), h = win.height();
	$(id).dialog('option', { height: Math.min(h-20, height+130), width: Math.min(w-20, width+50) })
	.dialog('option', 'position', ['center', 'center']); // only works in a separate call (!?)
	};

	// adjust calendar view size
	this.view_resize = function()
	{
	var footer = fc.fullCalendar('getView').name == 'table' ? $('#agendaoptions').outerHeight() : 0;
	fc.fullCalendar('option', 'height', $('#calendar').height() - footer);
	};


	/* startup code */

	// create list of event sources AKA calendars
	this.calendars = {};
	var li, cal, active, event_sources = [];
	for (var id in rcmail.env.calendars) {
	cal = rcmail.env.calendars[id];
	this.calendars[id] = $.extend({
	url: "./?_task=calendar&_action=load_events&source="+escape(id),
	editable: !cal.readonly,
	className: 'fc-event-cal-'+id,
	id: id
	}, cal);

	this.calendars[id].color = settings.event_coloring % 2 ? '' : '#' + cal.color;

	if ((active = cal.active \|\| false)) {
	event_sources.push(this.calendars[id]);
	}

	// init event handler on calendar list checkbox
	if ((li = rcmail.get_folder_li(id, 'rcmlical'))) {
	$('#'+li.id+' input').click(function(e){
	var id = $(this).data('id');
	if (me.calendars[id]) { // add or remove event source on click
	var action;
	if (this.checked) {
	action = 'addEventSource';
	me.calendars[id].active = true;
	}
	else {
	action = 'removeEventSource';
	me.calendars[id].active = false;
	}

	// add/remove event source
	fc.fullCalendar(action, me.calendars[id]);
	rcmail.http_post('calendar', { action:'subscribe', c:{ id:id, active:me.calendars[id].active?1:0 } });
	}
	}).data('id', id).get(0).checked = active;

	$(li).click(function(e){
	var id = $(this).data('id');
	rcmail.select_folder(id, 'rcmlical');
	rcmail.enable_command('calendar-edit', true);
	rcmail.enable_command('calendar-remove', 'events-import', 'calendar-showurl', true);
	me.selected_calendar = id;
	})
	.dblclick(function(){ me.calendar_edit_dialog(me.calendars[me.selected_calendar]); })
	.data('id', id);
	}

	if (!cal.readonly && !this.selected_calendar) {
	this.selected_calendar = id;
	rcmail.enable_command('addevent', true);
	}
	}

	// select default calendar
	if (settings.default_calendar && this.calendars[settings.default_calendar] && !this.calendars[settings.default_calendar].readonly)
	this.selected_calendar = settings.default_calendar;

	var viewdate = new Date();
	if (rcmail.env.date)
	viewdate.setTime(fromunixtime(rcmail.env.date));

	// initalize the fullCalendar plugin
	var fc = $('#calendar').fullCalendar({
	header: {
	right: 'prev,next today',
	center: 'title',
	left: 'agendaDay,agendaWeek,month,table'
	},
	aspectRatio: 1,
	date: viewdate.getDate(),
	month: viewdate.getMonth(),
	year: viewdate.getFullYear(),
	ignoreTimezone: true, // will treat the given date strings as in local (browser's) timezone
	height: $('#calendar').height(),
	eventSources: event_sources,
	monthNames : settings['months'],
	monthNamesShort : settings['months_short'],
	dayNames : settings['days'],
	dayNamesShort : settings['days_short'],
	firstDay : settings['first_day'],
	firstHour : settings['first_hour'],
	slotMinutes : 60/settings['timeslots'],
	timeFormat: {
	'': settings['time_format'],
	agenda: settings['time_format'] + '{ - ' + settings['time_format'] + '}',
	list: settings['time_format'] + '{ - ' + settings['time_format'] + '}',
	table: settings['time_format'] + '{ - ' + settings['time_format'] + '}'
	},
	axisFormat : settings['time_format'],
	columnFormat: {
	month: 'ddd', // Mon
	week: 'ddd ' + settings['date_short'], // Mon 9/7
	day: 'dddd ' + settings['date_short'], // Monday 9/7
	table: settings['date_agenda']
	},
	titleFormat: {
	month: 'MMMM yyyy',
	week: settings['dates_long'],
	day: 'dddd ' + settings['date_long'],
	table: settings['dates_long']
	},
	listPage: 1, // advance one day in agenda view
	listRange: settings['agenda_range'],
	listSections: settings['agenda_sections'],
	tableCols: ['handle', 'date', 'time', 'title', 'location'],
	defaultView: rcmail.env.view \|\| settings['default_view'],
	allDayText: rcmail.gettext('all-day', 'calendar'),
	buttonText: {
	prev: (bw.ie6 ? ' << ' : ' ◄ '),
	next: (bw.ie6 ? ' >> ' : ' ► '),
	today: settings['today'],
	day: rcmail.gettext('day', 'calendar'),
	week: rcmail.gettext('week', 'calendar'),
	month: rcmail.gettext('month', 'calendar'),
	table: rcmail.gettext('agenda', 'calendar')
	},
	listTexts: {
	until: rcmail.gettext('until', 'calendar'),
	past: rcmail.gettext('pastevents', 'calendar'),
	today: rcmail.gettext('today', 'calendar'),
	tomorrow: rcmail.gettext('tomorrow', 'calendar'),
	thisWeek: rcmail.gettext('thisweek', 'calendar'),
	nextWeek: rcmail.gettext('nextweek', 'calendar'),
	thisMonth: rcmail.gettext('thismonth', 'calendar'),
	nextMonth: rcmail.gettext('nextmonth', 'calendar'),
	future: rcmail.gettext('futureevents', 'calendar'),
	week: rcmail.gettext('weekofyear', 'calendar')
	},
	selectable: true,
	selectHelper: false,
	currentTimeIndicator: settings.time_indicator,
	loading: function(isLoading) {
	me.is_loading = isLoading;
	this._rc_loading = rcmail.set_busy(isLoading, 'loading', this._rc_loading);
	// trigger callback
	if (!isLoading)
	me.events_loaded($(this).fullCalendar('clientEvents').length);
	},
	// event rendering
	eventRender: fc_event_render,
	// render element indicating more (invisible) events
	overflowRender: function(data, element) {
	element.html(rcmail.gettext('andnmore', 'calendar').replace('$nr', data.count))
	.click(function(e){ me.fisheye_view(data.date); });
	},
	// callback for date range selection
	select: function(start, end, allDay, e, view) {
	var range_select = (!allDay \|\| start.getDate() != end.getDate())
	if (dialog_check(e) && range_select)
	event_edit_dialog('new', { start:start, end:end, allDay:allDay, calendar:me.selected_calendar });
	if (range_select \|\| ignore_click)
	view.calendar.unselect();
	},
	// callback for clicks in all-day box
	dayClick: function(date, allDay, e, view) {
	var now = new Date().getTime();
	if (now - day_clicked_ts < 400 && day_clicked == date.getTime()) { // emulate double-click on day
	var enddate = new Date(); enddate.setTime(date.getTime() + DAY_MS - 60000);
	return event_edit_dialog('new', { start:date, end:enddate, allDay:allDay, calendar:me.selected_calendar });
	}

	if (!ignore_click) {
	view.calendar.gotoDate(date);
	if (day_clicked && new Date(day_clicked).getMonth() != date.getMonth())
	view.calendar.select(date, date, allDay);
	}
	day_clicked = date.getTime();
	day_clicked_ts = now;
	},
	// callback when a specific event is clicked
	eventClick: function(event) {
	if (!event.temp)
	event_show_dialog(event);
	},
	// callback when an event was dragged and finally dropped
	eventDrop: function(event, dayDelta, minuteDelta, allDay, revertFunc) {
	if (event.end == null \|\| event.end.getTime() < event.start.getTime()) {
	event.end = new Date(event.start.getTime() + (allDay ? DAY_MS : HOUR_MS));
	}
	// moved to all-day section: set times to 12:00 - 13:00
	if (allDay && !event.allDay) {
	event.start.setHours(12);
	event.start.setMinutes(0);
	event.start.setSeconds(0);
	event.end.setHours(13);
	event.end.setMinutes(0);
	event.end.setSeconds(0);
	}
	// moved from all-day section: set times to working hours
	else if (event.allDay && !allDay) {
	var newstart = event.start.getTime();
	revertFunc(); // revert to get original duration
	var numdays = Math.max(1, Math.round((event.end.getTime() - event.start.getTime()) / DAY_MS)) - 1;
	event.start = new Date(newstart);
	event.end = new Date(newstart + numdays * DAY_MS);
	event.end.setHours(settings['work_end'] \|\| 18);
	event.end.setMinutes(0);

	if (event.end.getTime() < event.start.getTime())
	event.end = new Date(newstart + HOUR_MS);
	}

	// send move request to server
	var data = {
	id: event.id,
	calendar: event.calendar,
	start: date2servertime(event.start),
	end: date2servertime(event.end),
	allday: allDay?1:0
	};
	update_event_confirm('move', event, data);
	},
	// callback for event resizing
	eventResize: function(event, delta) {
	// sanitize event dates
	if (event.allDay)
	event.start.setHours(12);
	if (!event.end \|\| event.end.getTime() < event.start.getTime())
	event.end = new Date(event.start.getTime() + HOUR_MS);

	// send resize request to server
	var data = {
	id: event.id,
	calendar: event.calendar,
	start: date2servertime(event.start),
	end: date2servertime(event.end)
	};
	update_event_confirm('resize', event, data);
	},
	viewDisplay: function(view) {
	$('#agendaoptions')[view.name == 'table' ? 'show' : 'hide']();
	if (minical) {
	window.setTimeout(function(){ minical.datepicker('setDate', fc.fullCalendar('getDate')); }, exec_deferred);
	if (view.name != current_view)
	me.view_resize();
	current_view = view.name;
	}
	},
	viewRender: function(view) {
	if (fc && view.name == 'month')
	fc.fullCalendar('option', 'maxHeight', Math.floor((view.element.parent().height()-18) / 6) - 35);
	}
	});

	// format time string
	var formattime = function(hour, minutes, start) {
	var time, diff, unit, duration = '', d = new Date();
	d.setHours(hour);
	d.setMinutes(minutes);
	time = $.fullCalendar.formatDate(d, settings['time_format']);
	if (start) {
	diff = Math.floor((d.getTime() - start.getTime()) / 60000);
	if (diff > 0) {
	unit = 'm';
	if (diff >= 60) {
	unit = 'h';
	diff = Math.round(diff / 3) / 20;
	}
	duration = ' (' + diff + unit + ')';
	}
	}
	return [time, duration];
	};

	var autocomplete_times = function(p, callback) {
	/* Time completions */
	var result = [];
	var now = new Date();
	var st, start = (String(this.element.attr('id')).indexOf('endtime') > 0
	&& (st = $('#edit-starttime').val())
	&& $('#edit-startdate').val() == $('#edit-enddate').val())
	? parse_datetime(st, '') : null;
	var full = p.term - 1 > 0 \|\| p.term.length > 1;
	var hours = start ? start.getHours() :
	(full ? parse_datetime(p.term, '') : now).getHours();
	var step = 15;
	var minutes = hours * 60 + (full ? 0 : now.getMinutes());
	var min = Math.ceil(minutes / step) * step % 60;
	var hour = Math.floor(Math.ceil(minutes / step) * step / 60);
	// list hours from 0:00 till now
	for (var h = start ? start.getHours() : 0; h < hours; h++)
	result.push(formattime(h, 0, start));
	// list 15min steps for the next two hours
	for (; h < hour + 2 && h < 24; h++) {
	while (min < 60) {
	result.push(formattime(h, min, start));
	min += step;
	}
	min = 0;
	}
	// list the remaining hours till 23:00
	while (h < 24)
	result.push(formattime((h++), 0, start));

	return callback(result);
	};

	var autocomplete_open = function(event, ui) {
	// scroll to current time
	var $this = $(this);
	var widget = $this.autocomplete('widget');
	var menu = $this.data('autocomplete').menu;
	var amregex = /^(.+)(a[.m]*)/i;
	var pmregex = /^(.+)(a[.m]*)/i;
	var val = $(this).val().replace(amregex, '0:$1').replace(pmregex, '1:$1');
	var li, html;
	widget.css('width', '10em');
	widget.children().each(function(){
	li = $(this);
	html = li.children().first().html().replace(/\s+$.+$$/, '').replace(amregex, '0:$1').replace(pmregex, '1:$1');
	if (html.indexOf(val) == 0)
	menu._scrollIntoView(li);
	});
	};

	// if start date is changed, shift end date according to initial duration
	var shift_enddate = function(dateText) {
	var newstart = parse_datetime('0', dateText);
	var newend = new Date(newstart.getTime() + $('#edit-startdate').data('duration') * 1000);
	$('#edit-enddate').val($.fullCalendar.formatDate(newend, me.settings['date_format']));
	event_times_changed();
	};

	// Set as calculateWeek to determine the week of the year based on the ISO 8601 definition.
	// Uses the default $.datepicker.iso8601Week() function but takes firstDay setting into account.
	// This is a temporary fix until http://bugs.jqueryui.com/ticket/8420 is resolved.
	var iso8601Week = datepicker_settings.calculateWeek = function(date) {
	var mondayOffset = Math.abs(1 - datepicker_settings.firstDay);
	return $.datepicker.iso8601Week(new Date(date.getTime() + mondayOffset * 86400000));
	};

	var minical;
	var init_calendar_ui = function()
	{
	// initialize small calendar widget using jQuery UI datepicker
	minical = $('#datepicker').datepicker($.extend(datepicker_settings, {
	inline: true,
	showWeek: true,
	changeMonth: false, // maybe enable?
	changeYear: false, // maybe enable?
	onSelect: function(dateText, inst) {
	ignore_click = true;
	var d = minical.datepicker('getDate'); //parse_datetime('0:0', dateText);
	fc.fullCalendar('gotoDate', d).fullCalendar('select', d, d, true);
	},
	onChangeMonthYear: function(year, month, inst) {
	minical.data('year', year).data('month', month);
	},
	beforeShowDay: function(date) {
	var view = fc.fullCalendar('getView');
	var active = view.visStart && date.getTime() >= view.visStart.getTime() && date.getTime() < view.visEnd.getTime();
	return [ true, (active ? 'ui-datepicker-activerange ui-datepicker-active-' + view.name : ''), ''];
	}
	})) // set event handler for clicks on calendar week cell of the datepicker widget
	.click(function(e) {
	var cell = $(e.target);
	if (e.target.tagName == 'TD' && cell.hasClass('ui-datepicker-week-col')) {
	var base_date = minical.datepicker('getDate');
	if (minical.data('month'))
	base_date.setMonth(minical.data('month')-1);
	if (minical.data('year'))
	base_date.setYear(minical.data('year'));
	base_date.setHours(12);
	base_date.setDate(base_date.getDate() - ((base_date.getDay() + 6) % 7) + datepicker_settings.firstDay);
	var day_off = base_date.getDay() - datepicker_settings.firstDay;
	var base_kw = iso8601Week(base_date);
	var target_kw = parseInt(cell.html());
	var diff = (target_kw - base_kw) * 7 * DAY_MS;
	// select monday of the chosen calendar week
	var date = new Date(base_date.getTime() - day_off * DAY_MS + diff);
	fc.fullCalendar('gotoDate', date).fullCalendar('setDate', date).fullCalendar('changeView', 'agendaWeek');
	minical.datepicker('setDate', date);
	}
	});

	// init event dialog
	$('#eventtabs').tabs({
	show: function(event, ui) {
	if (ui.panel.id == 'event-tab-3') {
	$('#edit-attendee-name').select();
	// update free-busy status if needed
	if (freebusy_ui.needsupdate && me.selected_event)
	update_freebusy_status(me.selected_event);
	// add current user as organizer if non added yet
	if (!event_attendees.length) {
	add_attendee($.extend({ role:'ORGANIZER' }, settings.identity));
	$('#edit-attendees-form .attendees-invitebox').show();
	}
	}
	}
	});
	$('#edit-enddate').datepicker(datepicker_settings);
	$('#edit-startdate').datepicker(datepicker_settings).datepicker('option', 'onSelect', shift_enddate).change(function(){ shift_enddate(this.value); });
	$('#edit-enddate').datepicker('option', 'onSelect', event_times_changed).change(event_times_changed);
	$('#edit-allday').click(function(){ $('#edit-starttime, #edit-endtime')[(this.checked?'hide':'show')](); event_times_changed(); });

	// configure drop-down menu on time input fields based on jquery UI autocomplete
	$('#edit-starttime, #edit-endtime, #eventedit input.edit-alarm-time')
	.attr('autocomplete', "off")
	.autocomplete({
	delay: 100,
	minLength: 1,
	source: autocomplete_times,
	open: autocomplete_open,
	change: event_times_changed,
	select: function(event, ui) {
	$(this).val(ui.item[0]);
	return false;
	}
	})
	.click(function() { // show drop-down upon clicks
	$(this).autocomplete('search', $(this).val() ? $(this).val().replace(/\D.*/, "") : " ");
	}).each(function(){
	$(this).data('autocomplete')._renderItem = function(ul, item) {
	return $('<li>')
	.data('item.autocomplete', item)
	.append('<a>' + item[0] + item[1] + '</a>')
	.appendTo(ul);
	};
	});

	// register events on alarm fields
	init_alarms_edit('#eventedit');

	// toggle recurrence frequency forms
	$('#edit-recurrence-frequency').change(function(e){
	var freq = $(this).val().toLowerCase();
	$('.recurrence-form').hide();
	if (freq)
	$('#recurrence-form-'+freq+', #recurrence-form-until').show();
	});
	$('#edit-recurrence-enddate').datepicker(datepicker_settings).click(function(){ $("#edit-recurrence-repeat-until").prop('checked', true) });
	$('#edit-recurrence-repeat-times').change(function(e){ $('#edit-recurrence-repeat-count').prop('checked', true); });

	// init attendees autocompletion
	var ac_props;
	// parallel autocompletion
	if (rcmail.env.autocomplete_threads > 0) {
	ac_props = {
	threads: rcmail.env.autocomplete_threads,
	sources: rcmail.env.autocomplete_sources
	};
	}
	rcmail.init_address_input_events($('#edit-attendee-name'), ac_props);
	rcmail.addEventListener('autocomplete_insert', function(e){ $('#edit-attendee-add').click(); });

	$('#edit-attendee-add').click(function(){
	var input = $('#edit-attendee-name');
	rcmail.ksearch_blur();
	if (add_attendees(input.val())) {
	input.val('');
	}
	});

	// keep these two checkboxes in sync
	$('#edit-attendees-donotify, #edit-attendees-invite').click(function(){
	$('#edit-attendees-donotify, #edit-attendees-invite').prop('checked', this.checked);
	});

	$('#edit-attendee-schedule').click(function(){
	event_freebusy_dialog();
	});

	$('#shedule-freebusy-prev').html(bw.ie6 ? '<<' : '◄').button().click(function(){ render_freebusy_grid(-1); });
	$('#shedule-freebusy-next').html(bw.ie6 ? '>>' : '►').button().click(function(){ render_freebusy_grid(1); }).parent().buttonset();

	$('#shedule-find-prev').button().click(function(){ freebusy_find_slot(-1); });
	$('#shedule-find-next').button().click(function(){ freebusy_find_slot(1); });

	$('#schedule-freebusy-workinghours').click(function(){
	freebusy_ui.workinhoursonly = this.checked;
	$('#workinghourscss').remove();
	if (this.checked)
	$('<style type="text/css" id="workinghourscss"> td.offhours { opacity:0.3; filter:alpha(opacity=30) } </style>').appendTo('head');
	});

	$('#event-rsvp input.button').click(function(){
	event_rsvp($(this).attr('rel'))
	});

	$('#agenda-listrange').change(function(e){
	settings['agenda_range'] = parseInt($(this).val());
	fc.fullCalendar('option', 'listRange', settings['agenda_range']).fullCalendar('render');
	// TODO: save new settings in prefs
	}).val(settings['agenda_range']);

	$('#agenda-listsections').change(function(e){
	settings['agenda_sections'] = $(this).val();
	fc.fullCalendar('option', 'listSections', settings['agenda_sections']).fullCalendar('render');
	// TODO: save new settings in prefs
	}).val(fc.fullCalendar('option', 'listSections'));

	// hide event dialog when clicking somewhere into document
	$(document).bind('mousedown', dialog_check);

	rcmail.set_busy(false, 'loading', ui_loading);
	}

	// initialize more UI elements (deferred)
	window.setTimeout(init_calendar_ui, exec_deferred);

	// add proprietary css styles if not IE
	if (!bw.ie)
	$('div.fc-content').addClass('rcube-fc-content');

	// IE supresses 2nd click event when double-clicking
	if (bw.ie && bw.vendver < 9) {
	$('div.fc-content').bind('dblclick', function(e){
	if (!$(this).hasClass('fc-widget-header') && fc.fullCalendar('getView').name != 'table') {
	var date = fc.fullCalendar('getDate');
	var enddate = new Date(); enddate.setTime(date.getTime() + DAY_MS - 60000);
	event_edit_dialog('new', { start:date, end:enddate, allDay:true, calendar:me.selected_calendar });
	}
	});
	}
	} // end rcube_calendar class


	/* calendar plugin initialization */
	window.rcmail && rcmail.addEventListener('init', function(evt) {
	// configure toolbar buttons
	rcmail.register_command('addevent', function(){ cal.add_event(); }, true);
	rcmail.register_command('print', function(){ cal.print_calendars(); }, true);

	// configure list operations
	rcmail.register_command('calendar-create', function(){ cal.calendar_edit_dialog(null); }, true);
	rcmail.register_command('calendar-edit', function(){ cal.calendar_edit_dialog(cal.calendars[cal.selected_calendar]); }, false);
	rcmail.register_command('calendar-remove', function(){ cal.calendar_remove(cal.calendars[cal.selected_calendar]); }, false);
	rcmail.register_command('events-import', function(){ cal.import_events(cal.calendars[cal.selected_calendar]); }, false);
	rcmail.register_command('calendar-showurl', function(){ cal.showurl(cal.calendars[cal.selected_calendar]); }, false);

	// search and export events
	rcmail.register_command('export', function(){ rcmail.goto_url('export_events', { source:cal.selected_calendar }); }, true);
	rcmail.register_command('search', function(){ cal.quicksearch(); }, true);
	rcmail.register_command('reset-search', function(){ cal.reset_quicksearch(); }, true);

	// register callback commands
	rcmail.addEventListener('plugin.destroy_source', function(p){ cal.calendar_destroy_source(p.id); });
	rcmail.addEventListener('plugin.unlock_saving', function(p){ cal.unlock_saving(); });
	rcmail.addEventListener('plugin.refresh_calendar', function(p){ cal.refresh(p); });
	rcmail.addEventListener('plugin.import_success', function(p){ cal.import_success(p); });

	// let's go
	var cal = new rcube_calendar_ui($.extend(rcmail.env.calendar_settings, rcmail.env.libcal_settings));

	$(window).resize(function(e) {
	// check target due to bugs in jquery
	// http://bugs.jqueryui.com/ticket/7514
	// http://bugs.jquery.com/ticket/9841
	if (e.target == window) {
	cal.view_resize();
	}
	}).resize();

	// show calendars list when ready
	$('#calendars').css('visibility', 'inherit');

	// show toolbar
	$('#toolbar').show();

	});
	diff --git a/plugins/kolab_files/kolab_files.js b/plugins/kolab_files/kolab_files.js
	index a16f8ff7..f01a477b 100644
	--- a/plugins/kolab_files/kolab_files.js
	+++ b/plugins/kolab_files/kolab_files.js
	@@ -1,1333 +1,1330 @@
	/**
	* Kolab files plugin
	*
	* @version @package_version@
	* @author Aleksander Machniak <alec@alec.pl>
	*/

	window.rcmail && rcmail.addEventListener('init', function() {
	if (rcmail.task == 'mail') {
	// mail compose
	if (rcmail.env.action == 'compose') {
	var elem = $('#compose-attachments > div'),
	input = $('<input class="button" type="button">');

	input.val(rcmail.gettext('kolab_files.fromcloud'))
	.click(function() { kolab_files_selector_dialog(); })
	.appendTo(elem);

	if (rcmail.gui_objects.filelist) {
	rcmail.file_list = new rcube_list_widget(rcmail.gui_objects.filelist, {
	multiselect: true,
	// draggable: true,
	keyboard: true,
	column_movable: false,
	dblclick_time: rcmail.dblclick_time
	});
	rcmail.file_list.addEventListener('select', function(o) { kolab_files_list_select(o); });
	rcmail.file_list.addEventListener('listupdate', function(e) { rcmail.triggerEvent('listupdate', e); });

	rcmail.gui_objects.filelist.parentNode.onmousedown = function(e){ return kolab_files_click_on_list(e); };
	rcmail.enable_command('files-sort', 'files-search', 'files-search-reset', true);

	rcmail.file_list.init();
	kolab_files_list_coltypes();
	}
	}
	// mail preview
	else if (rcmail.env.action == 'show' \|\| rcmail.env.action == 'preview') {
	var attachment_list = $('#attachment-list');

	if ($('li', attachment_list).length) {
	var link = $('<a href="#" class="button filesaveall">')
	.text(rcmail.gettext('kolab_files.saveall'))
	.click(function() { kolab_directory_selector_dialog(); })
	.appendTo(attachment_list);
	}

	rcmail.addEventListener('menu-open', kolab_files_attach_menu_open);
	}

	kolab_files_init();
	}
	else if (rcmail.task == 'files') {
	if (rcmail.gui_objects.filelist) {
	rcmail.file_list = new rcube_list_widget(rcmail.gui_objects.filelist, {
	multiselect: true,
	draggable: true,
	keyboard: true,
	column_movable: rcmail.env.col_movable,
	dblclick_time: rcmail.dblclick_time
	});
	/*
	rcmail.file_list.row_init = function(o){ kolab_files_init_file_row(o); };
	rcmail.file_list.addEventListener('dblclick', function(o){ p.msglist_dbl_click(o); });
	rcmail.file_list.addEventListener('click', function(o){ p.msglist_click(o); });
	rcmail.file_list.addEventListener('keypress', function(o){ p.msglist_keypress(o); });
	rcmail.file_list.addEventListener('dragstart', function(o){ p.drag_start(o); });
	rcmail.file_list.addEventListener('dragmove', function(e){ p.drag_move(e); });
	*/
	rcmail.file_list.addEventListener('dblclick', function(o){ kolab_files_list_dblclick(o); });
	rcmail.file_list.addEventListener('select', function(o){ kolab_files_list_select(o); });
	rcmail.file_list.addEventListener('dragend', function(e){ kolab_files_drag_end(e); });
	rcmail.file_list.addEventListener('column_replace', function(e){ kolab_files_set_coltypes(e); });
	rcmail.file_list.addEventListener('listupdate', function(e){ rcmail.triggerEvent('listupdate', e); });

	// document.onmouseup = function(e){ return p.doc_mouse_up(e); };
	rcmail.gui_objects.filelist.parentNode.onmousedown = function(e){ return kolab_files_click_on_list(e); };

	rcmail.enable_command('menu-open', 'menu-save', 'files-sort', 'files-search', 'files-search-reset', true);

	rcmail.file_list.init();
	kolab_files_list_coltypes();
	}

	// "one file only" commands
	rcmail.env.file_commands = ['files-get'];
	// "one or more file" commands
	rcmail.env.file_commands_all = ['files-delete', 'files-move', 'files-copy'];

	kolab_files_init();

	if (rcmail.env.action == 'open') {
	rcmail.enable_command('files-get', 'files-delete', rcmail.env.file);
	}
	else {
	file_api.folder_list();
	file_api.browser_capabilities_check();
	}
	}
	});


	/**********************************************************/
	/******* Shared functionality ********/
	/**********************************************************/

	// Initializes API object
	function kolab_files_init()
	{
	if (window.file_api)
	return;

	// Initialize application object (don't change var name!)
	file_api = $.extend(new files_api(), new kolab_files_ui());

	file_api.set_env({
	token: kolab_files_token(),
	url: rcmail.env.files_url,
	sort_col: 'name',
	sort_reverse: false,
	search_threads: rcmail.env.search_threads,
	resources_dir: 'program/resources',
	supported_mimetypes: rcmail.env.file_mimetypes
	});

	file_api.translations = rcmail.labels;
	};

	// returns API authorization token
	function kolab_files_token()
	{
	// consider the token from parent window more reliable (fresher) than in framed window
	// it's because keep-alive is not requested in frames
	return (window.parent && parent.rcmail && parent.rcmail.env.files_token) \|\| rcmail.env.files_token;
	};

	// folder selection dialog
	function kolab_directory_selector_dialog(id)
	{
	var dialog = $('#files-dialog'), buttons = {},
	input = $('#file-save-as-input'),
	form = $('#file-save-as'),
	list = $('#folderlistbox');

	// attachment is specified
	if (id) {
	var attach = $('#attach'+id), filename = attach.attr('title') \|\| attach.text();
	form.show();
	dialog.addClass('saveas');
	input.val(filename);
	}
	else {
	form.hide();
	dialog.removeClass('saveas');
	}

	buttons[rcmail.gettext('kolab_files.save')] = function () {
	var lock = rcmail.set_busy(true, 'saving'),
	request = {
	act: 'save-file',
	source: rcmail.env.mailbox,
	uid: rcmail.env.uid,
	dest: file_api.env.folder
	};

	if (id) {
	request.id = id;
	request.name = input.val();
	}

	rcmail.http_post('plugin.kolab_files', request, lock);
	dialog.dialog('destroy').hide();
	};
	buttons[rcmail.gettext('kolab_files.cancel')] = function () {
	dialog.dialog('destroy').hide();
	};

	// show dialog window
	dialog.dialog({
	modal: true,
	resizable: !bw.ie6,
	closeOnEscape: (!bw.ie6 && !bw.ie7), // disable for performance reasons
	title: rcmail.gettext('kolab_files.' + (id ? 'saveto' : 'saveall')),
	// close: function() { rcmail.dialog_close(); },
	buttons: buttons,
	minWidth: 250,
	minHeight: 300,
	height: 350,
	width: 300
	}).show();

	if (!rcmail.env.folders_loaded) {
	file_api.folder_list();
	rcmail.env.folders_loaded = true;
	}
	};

	// file selection dialog
	function kolab_files_selector_dialog()
	{
	var dialog = $('#files-compose-dialog'), buttons = {};

	buttons[rcmail.gettext('kolab_files.attachsel')] = function () {
	var list = [];
	$('#filelist tr.selected').each(function() {
	list.push($(this).data('file'));
	});

	dialog.dialog('destroy').hide();

	if (list.length) {
	// display upload indicator and cancel button
	var content = '<span>' + rcmail.get_label('kolab_files.attaching') + '</span>',
	id = new Date().getTime();

	rcmail.add2attachment_list(id, {name:'', html:content, classname:'uploading', complete:false});

	// send request
	rcmail.http_post('plugin.kolab_files', {
	act: 'attach-file',
	files: list,
	id: rcmail.env.compose_id,
	uploadid: id
	});
	}
	};
	buttons[rcmail.gettext('kolab_files.cancel')] = function () {
	dialog.dialog('destroy').hide();
	};

	// show dialog window
	dialog.dialog({
	modal: true,
	resizable: !bw.ie6,
	closeOnEscape: (!bw.ie6 && !bw.ie7), // disable for performance reasons
	title: rcmail.gettext('kolab_files.selectfiles'),
	// close: function() { rcmail.dialog_close(); },
	buttons: buttons,
	minWidth: 500,
	minHeight: 300,
	width: 700,
	height: 500
	}).show();

	if (!rcmail.env.files_loaded) {
	file_api.folder_list();
	rcmail.env.files_loaded = true;
	}
	else
	rcmail.file_list.clear_selection();
	};

	function kolab_files_attach_menu_open(p)
	{
	if (!p \|\| !p.props \|\| p.props.menu != 'attachmentmenu')
	return;

	var id = p.props.id;

	$('#attachmenusaveas').unbind('click').attr('onclick', '').click(function(e) {
	return kolab_directory_selector_dialog(id);
	});
	};

	// folder creation dialog
	function kolab_files_folder_create_dialog()
	{
	var dialog = $('#files-folder-create-dialog'),
	buttons = {},
	select = $('select[name="parent"]', dialog).html(''),
	input = $('input[name="name"]', dialog).val('');

	buttons[rcmail.gettext('kolab_files.create')] = function () {
	var folder = '', name = input.val(), parent = select.val();

	if (!name)
	return;

	if (parent)
	folder = parent + file_api.env.directory_separator;

	folder += name;

	file_api.folder_create(folder);
	dialog.dialog('destroy').hide();
	};
	buttons[rcmail.gettext('kolab_files.cancel')] = function () {
	dialog.dialog('destroy').hide();
	};

	// show dialog window
	dialog.dialog({
	modal: true,
	resizable: !bw.ie6,
	closeOnEscape: (!bw.ie6 && !bw.ie7), // disable for performance reasons
	title: rcmail.gettext('kolab_files.foldercreate'),
	// close: function() { rcmail.dialog_close(); },
	buttons: buttons,
	minWidth: 400,
	minHeight: 300,
	width: 500,
	height: 400
	}).show();

	// build parent selector
	select.append($('<option>').val('').text('---'));
	$.each(file_api.env.folders, function(i, f) {
	var n, option = $('<option>'), name = escapeHTML(f.name);

	for (n=0; n<f.depth; n++)
	name = '   ' + name;

	option.val(i).html(name).appendTo(select);

	if (i == file_api.env.folder)
	option.attr('selected', true);
	});
	};

	// smart upload button
	function kolab_files_upload_input(button)
	{
	var link = $(button),
	file = $('<input>'),
	offset = link.offset();

	file.attr({name: 'file[]', type: 'file', multiple: 'multiple', size: 5})
	.change(function() { rcmail.files_upload('#filesuploadform'); })
	// opacity:0 does the trick, display/visibility doesn't work
	.css({opacity: 0, cursor: 'pointer', outline: 'none', position: 'absolute', top: '10000px', left: '10000px'});

	// In FF and IE we need to move the browser file-input's button under the cursor
	// Thanks to the size attribute above we know the length of the input field
	if (bw.mz \|\| bw.ie)
	file.css({marginLeft: '-80px'});

	// Note: now, I observe problem with cursor style on FF < 4 only
	link.css({overflow: 'hidden', cursor: 'pointer'})
	// place button under the cursor
	.mousemove(function(e) {
	if (rcmail.commands['files-upload'])
	file.css({top: (e.pageY - offset.top - 10) + 'px', left: (e.pageX - offset.left - 10) + 'px'});
	// move the input away if button is disabled
	else
	$(this).mouseleave();
	})
	.mouseleave(function() { file.css({top: '10000px', left: '10000px'}); })
	.attr('onclick', '') // remove default button action
	.append(file);
	};


	/***********************************************************/
	/******** Main functionality ********/
	/***********************************************************/

	// for reordering column array (Konqueror workaround)
	// and for setting some message list global variables
	kolab_files_list_coltypes = function()
	{
	var n, list = rcmail.file_list;

	rcmail.env.subject_col = null;

	if ((n = $.inArray('name', rcmail.env.coltypes)) >= 0) {
	rcmail.env.subject_col = n;
	list.subject_col = n;
	}

	list.init_header();
	};

	kolab_files_set_list_options = function(cols, sort_col, sort_order)
	{
	var update = 0, i, idx, name, newcols = [], oldcols = rcmail.env.coltypes;

	if (sort_col === undefined)
	sort_col = rcmail.env.sort_col;
	if (!sort_order)
	sort_order = rcmail.env.sort_order;

	if (rcmail.env.sort_col != sort_col \|\| rcmail.env.sort_order != sort_order) {
	update = 1;
	rcmail.set_list_sorting(sort_col, sort_order);
	}

	if (cols && cols.length) {
	// make sure new columns are added at the end of the list
	for (i=0; i<oldcols.length; i++) {
	name = oldcols[i];
	idx = $.inArray(name, cols);
	if (idx != -1) {
	newcols.push(name);
	delete cols[idx];
	}
	}
	for (i=0; i<cols.length; i++)
	if (cols[i])
	newcols.push(cols[i]);

	if (newcols.join() != oldcols.join()) {
	update += 2;
	oldcols = newcols;
	}
	}

	if (update == 1)
	rcmail.command('files-list', {sort: sort_col, reverse: sort_order == 'DESC'});
	else if (update) {
	rcmail.http_post('files/prefs', {
	kolab_files_list_cols: oldcols,
	kolab_files_sort_col: sort_col,
	kolab_files_sort_order: sort_order
	}, rcmail.set_busy(true, 'loading'));
	}
	};

	kolab_files_set_coltypes = function(list)
	{
	var i, found, name, cols = list.list.tHead.rows[0].cells;

	rcmail.env.coltypes = [];

	for (i=0; i<cols.length; i++)
	if (cols[i].id && cols[i].id.match(/^rcm/)) {
	name = cols[i].id.replace(/^rcm/, '');
	rcmail.env.coltypes.push(name);
	}

	// if ((found = $.inArray('name', rcmail.env.coltypes)) >= 0)
	// rcmail.env.subject_col = found;
	rcmail.env.subject_col = list.subject_col;

	rcmail.http_post('files/prefs', {kolab_files_list_cols: rcmail.env.coltypes});
	};

	kolab_files_click_on_list = function(e)
	{
	if (rcmail.gui_objects.qsearchbox)
	rcmail.gui_objects.qsearchbox.blur();

	if (rcmail.file_list)
	rcmail.file_list.focus();

	return true;
	};

	kolab_files_list_dblclick = function(list)
	{
	rcmail.command('files-open');
	};

	kolab_files_list_select = function(list)
	{
	var selected = list.selection.length;

	rcmail.enable_command(rcmail.env.file_commands_all, selected);
	rcmail.enable_command(rcmail.env.file_commands, selected == 1);

	// reset all-pages-selection
	// if (list.selection.length && list.selection.length != list.rowcount)
	// rcmail.select_all_mode = false;

	// enable files-
	if (selected == 1) {
	// get file mimetype
	var type = $('tr.selected', list.list).data('type');
	rcmail.env.viewer = file_api.file_type_supported(type);
	}
	else
	rcmail.env.viewer = 0;
	/*
	) {
	// caps = this.browser_capabilities().join();
	href = '?' + $.param({_task: 'files', _action: 'open', file: file, viewer: viewer == 2 ? 1 : 0});
	var win = window.open(href, rcmail.html_identifier('rcubefile'+file));
	if (win)
	setTimeout(function() { win.focus(); }, 10);
	}
	*/
	rcmail.enable_command('files-open', rcmail.env.viewer);
	};

	kolab_files_drag_end = function(e)
	{
	var folder = $('#files-folder-list li.droptarget').removeClass('droptarget');

	if (folder.length) {
	folder = folder.data('folder');

	var modkey = rcube_event.get_modifier(e),
	menu = rcmail.gui_objects.file_dragmenu;

	if (menu && modkey == SHIFT_KEY && rcmail.commands['files-copy']) {
	var pos = rcube_event.get_mouse_pos(e);
	rcmail.env.drag_target = folder;
	$(menu).css({top: (pos.y-10)+'px', left: (pos.x-10)+'px'}).show();
	return;
	}

	rcmail.command('files-move', folder);
	}
	};

	kolab_files_drag_menu_action = function(command)
	{
	var menu = rcmail.gui_objects.file_dragmenu;

	if (menu)
	$(menu).hide();

	rcmail.command(command, rcmail.env.drag_target);
	};

	kolab_files_selected = function()
	{
	var files = [];
	$.each(rcmail.file_list.get_selection(), function(i, v) {
	var name, row = $('#rcmrow'+v);

	if (row.length == 1 && (name = row.data('file')))
	files.push(name);
	});

	return files;
	};


	/***********************************************************/
	/******** Commands ********/
	/***********************************************************/

	rcube_webmail.prototype.files_sort = function(props)
	{
	var params = {},
	sort_order = this.env.sort_order,
	sort_col = !this.env.disabled_sort_col ? props : this.env.sort_col;

	if (!this.env.disabled_sort_order)
	sort_order = this.env.sort_col == sort_col && sort_order == 'ASC' ? 'DESC' : 'ASC';

	// set table header and update env
	this.set_list_sorting(sort_col, sort_order);

	this.http_post('files/prefs', {kolab_files_sort_col: sort_col, kolab_files_sort_order: sort_order});

	params.sort = sort_col;
	params.reverse = sort_order == 'DESC';

	this.command('files-list', params);
	};

	rcube_webmail.prototype.files_search = function()
	{
	var value = $(this.gui_objects.filesearchbox).val();

	if (value)
	file_api.file_search(value, $('#search_all_folders').is(':checked'));
	else
	file_api.file_search_reset();
	};

	rcube_webmail.prototype.files_search_reset = function()
	{
	$(this.gui_objects.filesearchbox).val('');

	file_api.file_search_reset();
	};

	rcube_webmail.prototype.files_folder_delete = function()
	{
	if (confirm(this.get_label('kolab_files.folderdeleteconfirm')))
	file_api.folder_delete(file_api.env.folder);
	};

	rcube_webmail.prototype.files_delete = function()
	{
	if (!confirm(this.get_label('kolab_files.filedeleteconfirm')))
	return;

	var files = this.env.file ? [this.env.file] : kolab_files_selected();
	file_api.file_delete(files);
	};

	rcube_webmail.prototype.files_move = function(folder)
	{
	var files = kolab_files_selected();
	file_api.file_move(files, folder);
	};

	rcube_webmail.prototype.files_copy = function(folder)
	{
	var files = kolab_files_selected();
	file_api.file_copy(files, folder);
	};

	rcube_webmail.prototype.files_upload = function(form)
	{
	if (form)
	file_api.file_upload(form);
	};

	rcube_webmail.prototype.files_list = function(param)
	{
	// just rcmail wrapper, to handle command busy states
	file_api.file_list(param);
	}

	rcube_webmail.prototype.files_list_update = function(head)
	{
	var list = this.file_list;

	list.clear();
	$('thead', list.list).html(head);
	kolab_files_list_coltypes();
	file_api.file_list();
	};

	rcube_webmail.prototype.files_get = function()
	{
	var files = this.env.file ? [this.env.file] : kolab_files_selected();

	if (files.length == 1)
	file_api.file_get(files[0], {'force-download': true});
	};

	rcube_webmail.prototype.files_open = function()
	{
	var files = kolab_files_selected();

	if (files.length == 1)
	file_api.file_open(files[0], rcmail.env.viewer);
	};

	/**********************************************************/
	/******* Files API handler ********/
	/**********************************************************/

	function kolab_files_ui()
	{
	/*
	// Called on "session expired" session
	this.logout = function(response) {};

	// called when a request timed out
	this.request_timed_out = function() {};

	// called on start of the request
	this.set_request_time = function() {};

	// called on request response
	this.update_request_time = function() {};
	*/
	// set state
	this.set_busy = function(a, message)
	{
	if (this.req)
	rcmail.hide_message(this.req);

	return rcmail.set_busy(a, message);
	};

	// displays error message
	this.display_message = function(label, type)
	{
	return rcmail.display_message(this.t(label), type);
	};

	this.http_error = function(request, status, err)
	{
	rcmail.http_error(request, status, err);
	};

	// folders list request
	this.folder_list = function()
	{
	this.req = this.set_busy(true, 'loading');
	this.request('folder_list', {}, 'folder_list_response');
	};

	// folder list response handler
	this.folder_list_response = function(response)
	{
	if (!this.response(response))
	return;

	var first, elem = $('#files-folder-list'),
	list = $('<ul class="listing"></ul>'),
	collections = !rcmail.env.action.match(/^(preview\|show)$/) ? ['audio', 'video', 'image', 'document'] : [];

	elem.html('').append(list);

	this.env.folders = this.folder_list_parse(response.result);

	$.each(this.env.folders, function(i, f) {
	var row = $('<li class="mailbox"><span class="branch"></span></li>');

	row.attr('id', f.id).data('folder', i)
	.append($('<span class="name">').text(f.name))
	.click(function() { file_api.folder_select(i); });

	if (f.depth)
	$('span.branch', row).width(15 * f.depth);

	if (f.virtual)
	row.addClass('virtual');
	else
	row.mouseenter(function() {
	if (rcmail.file_list && rcmail.file_list.drag_active && !$(this).hasClass('selected'))
	$(this).addClass('droptarget');
	})
	.mouseleave(function() {
	if (rcmail.file_list && rcmail.file_list.drag_active)
	$(this).removeClass('droptarget');
	});

	list.append(row);

	if (!first)
	first = i;
	});

	// add virtual collections
	$.each(collections, function(i, n) {
	var row = $('<li class="mailbox collection ' + n + '"></li>');

	row.attr('id', 'folder-collection-' + n)
	.append($('<span class="name">').text(rcmail.gettext('kolab_files.collection_' + n)))
	.click(function() { file_api.folder_select(n, true); });

	list.append(row);
	});

	// select first folder?
	if (this.env.folder)
	this.folder_select(this.env.folder);
	else if (this.env.collection)
	this.folder_select(this.env.collection, true);
	else if (first)
	this.folder_select(first);

	// add tree icons
	this.folder_list_tree(this.env.folders);
	};

	this.folder_select = function(folder, is_collection)
	{
	var list = $('#files-folder-list > ul');

	if (rcmail.busy)
	return;

	$('li.selected', list).removeClass('selected');

	rcmail.enable_command('files-list', true);

	if (is_collection) {
	var found = $('#folder-collection-' + folder, list).addClass('selected');

	rcmail.enable_command('files-folder-delete', 'files-upload', false);
	this.env.folder = null;
	rcmail.command('files-list', {collection: folder});
	}
	else {
	var found = $('#' + this.env.folders[folder].id, list).addClass('selected');

	rcmail.enable_command('files-folder-delete', 'files-upload', true);
	this.env.folder = folder;
	this.env.collection = null;
	rcmail.command('files-list', {folder: folder});
	}
	};

	this.folder_unselect = function()
	{
	var list = $('#files-folder-list > ul');
	$('li.selected', list).removeClass('selected');
	rcmail.enable_command('files-folder-delete', 'files-upload', false);
	this.env.folder = null;
	this.env.collection = null;
	};

	// folder create request
	this.folder_create = function(folder)
	{
	this.req = this.set_busy(true, 'kolab_files.foldercreating');
	this.request('folder_create', {folder: folder}, 'folder_create_response');
	};

	// folder create response handler
	this.folder_create_response = function(response)
	{
	if (!this.response(response))
	return;

	this.display_message('kolab_files.foldercreatenotice', 'confirmation');

	// refresh folders list
	this.folder_list();
	};

	// folder delete request
	this.folder_delete = function(folder)
	{
	this.req = this.set_busy(true, 'kolab_files.folderdeleting');
	this.request('folder_delete', {folder: folder}, 'folder_delete_response');
	};

	// folder delete response handler
	this.folder_delete_response = function(response)
	{
	if (!this.response(response))
	return;

	this.env.folder = null;
	rcmail.enable_command('files-folder-delete', 'files-folder-rename', 'files-list', false);
	this.display_message('kolab_files.folderdeletenotice', 'confirmation');

	// refresh folders list
	this.folder_list();
	};

	this.file_list = function(params)
	{
	if (!rcmail.gui_objects.filelist)
	return;

	if (!params)
	params = {};

	if (params.all_folders) {
	params.collection = null;
	params.folder = null;
	this.folder_unselect();
	}

	if (params.collection == undefined)
	params.collection = this.env.collection;
	if (params.folder == undefined)
	params.folder = this.env.folder;
	if (params.sort == undefined)
	params.sort = this.env.sort_col;
	if (params.reverse == undefined)
	params.reverse = this.env.sort_reverse;
	if (params.search == undefined)
	params.search = this.env.search;

	this.env.folder = params.folder;
	this.env.collection = params.collection;
	this.env.sort_col = params.sort;
	this.env.sort_reverse = params.reverse;

	rcmail.enable_command(rcmail.env.file_commands, false);
	rcmail.enable_command(rcmail.env.file_commands_all, false);

	// empty the list
	this.env.file_list = [];
	rcmail.file_list.clear();

	// request
	if (params.collection \|\| params.all_folders)
	this.file_list_loop(params);
	else if (this.env.folder) {
	this.req = this.set_busy(true, 'loading');
	this.request('file_list', params, 'file_list_response');
	}
	};

	// file list response handler
	this.file_list_response = function(response)
	{
	if (!this.response(response))
	return;

	var i = 0, list = [], table = $('#filelist');

	$.each(response.result, function(key, data) {
	var row = file_api.file_list_row(key, data, ++i);
	rcmail.file_list.insert_row(row);
	data.row = row;
	data.filename = key;
	list.push(data);
	});

	this.env.file_list = list;
	};

	// call file_list request for every folder (used for search and virt. collections)
	this.file_list_loop = function(params)
	{
	var i, folders = [], limit = Math.max(this.env.search_threads \|\| 1, 1);

	if (params.collection) {
	if (!params.search)
	params.search = {};
	params.search['class'] = params.collection;
	delete params['collection'];
	}

	delete params['all_folders'];

	$.each(this.env.folders, function(i, f) {
	if (!f.virtual)
	folders.push(i);
	});

	this.env.folders_loop = folders;
	this.env.folders_loop_params = params;
	this.env.folders_loop_lock = false;

	for (i=0; i<folders.length && i<limit; i++) {
	this.req = this.set_busy(true, 'loading');
	params.folder = folders.shift();
	this.request('file_list', params, 'file_list_loop_response');
	}
	};

	// file list response handler for loop'ed request
	this.file_list_loop_response = function(response)
	{
	var i, folders = this.env.folders_loop,
	params = this.env.folders_loop_params,
	limit = Math.max(this.env.search_threads \|\| 1, 1),
	valid = this.response(response);

	for (i=0; i<folders.length && i<limit; i++) {
	this.req = this.set_busy(true, 'loading');
	params.folder = folders.shift();
	this.request('file_list', params, 'file_list_loop_response');
	}

	if (!valid)
	return;

	this.file_list_loop_result_add(response.result);
	};

	// add files from list request to the table (with sorting)
	this.file_list_loop_result_add = function(result)
	{
	// chack if result (hash-array) is empty
	if (!object_is_empty(result))
	return;

	if (this.env.folders_loop_lock) {
	setTimeout(function() { file_api.file_list_loop_result_add(result); }, 100);
	return;
	}

	// lock table, other list responses will wait
	this.env.folders_loop_lock = true;

	var n, i, len, elem, list = [], rows = [],
	index = this.env.file_list.length,
	table = rcmail.file_list;

	for (n=0, len=index; n<len; n++) {
	elem = this.env.file_list[n];
	for (i in result) {
	if (this.sort_compare(elem, result[i]) < 0)
	break;

	var row = this.file_list_row(i, result[i], ++index);
	table.insert_row(row, elem.row);
	result[i].row = row;
	result[i].filename = i;
	list.push(result[i]);
	delete result[i];
	}

	list.push(elem);
	}

	// add the rest of rows
	$.each(result, function(key, data) {
	var row = file_api.file_list_row(key, data, ++index);
	table.insert_row(row);
	result[key].row = row;
	result[key].filename = key;
	list.push(result[key]);
	});

	this.env.file_list = list;
	this.env.folders_loop_lock = false;
	};

	// sort files list (without API request)
	this.file_list_sort = function(col, reverse)
	{
	var n, len, list = this.env.file_list,
	table = $('#filelist'), tbody = $('<tbody>');

	this.env.sort_col = col;
	this.env.sort_reverse = reverse;

	if (!list \|\| !list.length)
	return;

	// sort the list
	list.sort(function (a, b) {
	return file_api.sort_compare(a, b);
	});

	// add rows to the new body
	for (n=0, len=list.length; n<len; n++) {
	tbody.append(list[n].row);
	}

	// replace table bodies
	$('tbody', table).replaceWith(tbody);
	};

	this.file_list_row = function(file, data, index)
	{
	var c, col, row = '';

	for (c in rcmail.env.coltypes) {
	c = rcmail.env.coltypes[c];
	if (c == 'name')
	col = '<td class="name filename ' + this.file_type_class(data.type) + '">'
	+ '<span>' + escapeHTML(data.name) + '</span></td>';
	else if (c == 'mtime')
	col = '<td class="mtime">' + data.mtime + '</td>';
	else if (c == 'size')
	col = '<td class="size">' + this.file_size(data.size) + '</td>';
	else if (c == 'options')
	col = '<td class="options"></td>'; // @TODO
	else
	col = '<td class="' + c + '"></td>';

	row += col;
	}

	row = $('<tr>')
	.html(row)
	.attr({id: 'rcmrow' + index, 'data-file': file, 'data-type': data.type});

	// collection (or search) lists files from all folders
	// display file name with full path as title
	if (!this.env.folder)
	$('td.name span', row).attr('title', file);

	return row.get(0);
	};

	this.file_search = function(value, all_folders)
	{
	if (value) {
	this.env.search = {name: value};
	rcmail.command('files-list', {search: this.env.search, all_folders: all_folders});
	}
	else
	this.search_reset();
	};

	this.file_search_reset = function()
	{
	if (this.env.search) {
	this.env.search = null;
	rcmail.command('files-list');
	}
	};

	this.file_get = function(file, params)
	{
	if (!params)
	params = {};

	params.token = this.env.token;
	params.file = file;

	rcmail.redirect(this.env.url + this.url('file_get', params));
	};

	// file(s) delete request
	this.file_delete = function(files)
	{
	this.req = this.set_busy(true, 'kolab_files.filedeleting');
	this.request('file_delete', {file: files}, 'file_delete_response');
	};

	// file(s) delete response handler
	this.file_delete_response = function(response)
	{
	if (!this.response(response))
	return;

	this.display_message('kolab_files.filedeletenotice', 'confirmation');
	if (rcmail.env.file) {
	// @TODO: reload files list in parent window
	window.close();
	}
	else
	this.file_list();
	};

	// file(s) move request
	this.file_move = function(files, folder)
	{
	if (!files \|\| !files.length \|\| !folder)
	return;

	var count = 0, list = {};

	$.each(files, function(i, v) {
	var name = folder + file_api.env.directory_separator + file_api.file_name(v);

	if (name != v) {
	list[v] = name;
	count++;
	}
	});

	if (!count)
	return;

	this.req = this.set_busy(true, 'kolab_files.filemoving');
	this.request('file_move', {file: list}, 'file_move_response');
	};

	// file(s) move response handler
	this.file_move_response = function(response)
	{
	if (!this.response(response))
	return;

	if (response.result && response.result.already_exist && response.result.already_exist.length)
	this.file_move_ask_user(response.result.already_exist, true);
	else {
	this.display_message('kolab_files.filemovenotice', 'confirmation');
	this.file_list();
	}
	};

	// file(s) copy request
	this.file_copy = function(files, folder)
	{
	if (!files \|\| !files.length \|\| !folder)
	return;

	var count = 0, list = {};

	$.each(files, function(i, v) {
	var name = folder + file_api.env.directory_separator + file_api.file_name(v);

	if (name != v) {
	list[v] = name;
	count++;
	}
	});

	if (!count)
	return;

	this.req = this.set_busy(true, 'kolab_files.filecopying');
	this.request('file_copy', {file: list}, 'file_copy_response');
	};

	// file(s) copy response handler
	this.file_copy_response = function(response)
	{
	if (!this.response(response))
	return;

	if (response.result && response.result.already_exist && response.result.already_exist.length)
	this.file_move_ask_user(response.result.already_exist);
	else
	this.display_message('kolab_files.filecopynotice', 'confirmation');
	};

	// when file move/copy operation returns file-exists error
	// this displays a dialog where user can decide to skip
	// or overwrite destination file(s)
	this.file_move_ask_user = function(list, move)
	{
	var file = list[0], buttons = {},
	text = rcmail.gettext('kolab_files.filemoveconfirm').replace('$file', file.dst)
	dialog = $('<div></div>');

	buttons[rcmail.gettext('kolab_files.fileoverwrite')] = function() {
	var file = list.shift(), f = {},
	action = move ? 'file_move' : 'file_copy';

	f[file.src] = file.dst;
	file_api.file_move_ask_list = list;
	file_api.file_move_ask_mode = move;
	dialog.dialog('destroy').remove();
	file_api.req = file_api.set_busy(true, move ? 'kolab_files.filemoving' : 'kolab_files.filecopying');
	file_api.request(action, {file: f, overwrite: 1}, 'file_move_ask_user_response');
	};

	if (list.length > 1)
	buttons[rcmail.gettext('kolab_files.fileoverwriteall')] = function() {
	var f = {}, action = move ? 'file_move' : 'file_copy';

	$.each(list, function() { f[this.src] = this.dst; });
	dialog.dialog('destroy').remove();
	file_api.req = file_api.set_busy(true, move ? 'kolab_files.filemoving' : 'kolab_files.filecopying');
	file_api.request(action, {file: f, overwrite: 1}, action + '_response');
	};

	var skip_func = function() {
	list.shift();
	dialog.dialog('destroy').remove();

	if (list.length)
	file_api.file_move_ask_user(list, move);
	else if (move)
	file_api.file_list();
	};

	buttons[rcmail.gettext('kolab_files.fileskip')] = skip_func;

	if (list.length > 1)
	buttons[rcmail.gettext('kolab_files.fileskipall')] = function() {
	dialog.dialog('destroy').remove();
	if (move)
	file_api.file_list();
	};

	// open jquery UI dialog
	dialog.dialog({
	modal: true,
	resizable: !bw.ie6,
	closeOnEscape: (!bw.ie6 && !bw.ie7), // disable for performance reasons
	close: skip_func,
	buttons: buttons,
	minWidth: 400,
	width: 400
	}).html(text).show();
	};

	// file move (with overwrite) response handler
	this.file_move_ask_user_response = function(response)
	{
	var move = this.file_move_ask_mode, list = this.file_move_ask_list;

	this.response(response);

	if (list && list.length)
	this.file_move_ask_user(list, mode);
	else {
	this.display_message('kolab_files.file' + (move ? 'move' : 'copy') + 'notice', 'confirmation');
	if (move)
	this.file_list();
	}
	};

	// file upload request
	this.file_upload = function(form)
	{
	var form = $(form),
	field = $('input[type=file]', form).get(0),
	files = field.files ? field.files.length : field.value ? 1 : 0;

	if (files) {
	// submit form and read server response
	this.file_upload_form(form, 'file_upload', function(event) {
	var doc, response;
	try {
	doc = this.contentDocument ? this.contentDocument : this.contentWindow.document;
	response = doc.body.innerHTML;
	// response may be wrapped in <pre> tag
	if (response.slice(0, 5).toLowerCase() == '<pre>' && response.slice(-6).toLowerCase() == '</pre>') {
	response = doc.body.firstChild.firstChild.nodeValue;
	}
	response = eval('(' + response + ')');
	} catch (err) {
	response = {status: 'ERROR'};
	}

	rcmail.hide_message(event.data.ts);

	// refresh the list on upload success
	if (file_api.response_parse(response))
	file_api.file_list();
	});
	}
	};

	// post the given form to a hidden iframe
	this.file_upload_form = function(form, action, onload)
	{
	var ts = rcmail.display_message(rcmail.get_label('kolab_files.uploading'), 'loading', 1000),
	frame_name = 'fileupload'+ts;
	/*
	// upload progress support
	if (this.env.upload_progress_name) {
	var fname = this.env.upload_progress_name,
	field = $('input[name='+fname+']', form);

	if (!field.length) {
	field = $('<input>').attr({type: 'hidden', name: fname});
	field.prependTo(form);
	}
	field.val(ts);
	}
	*/
	// have to do it this way for IE
	// otherwise the form will be posted to a new window
	if (document.all) {
	var html = '<iframe id="'+frame_name+'" name="'+frame_name+'"'
	+ ' src="program/resources/blank.gif" style="width:0;height:0;visibility:hidden;"></iframe>';
	document.body.insertAdjacentHTML('BeforeEnd', html);
	}
	// for standards-compliant browsers
	else
	$('<iframe>')
	.attr({name: frame_name, id: frame_name})
	.css({border: 'none', width: 0, height: 0, visibility: 'hidden'})
	.appendTo(document.body);

	// handle upload errors, parsing iframe content in onload
	$('#'+frame_name).on('load', {ts:ts}, onload);

	$(form).attr({
	target: frame_name,
	action: this.env.url + this.url(action, {folder: this.env.folder, token: this.env.token, uploadid:ts}),
	method: 'POST'
	}).attr(form.encoding ? 'encoding' : 'enctype', 'multipart/form-data')
	.submit();
	};

	// open file in new window, using file API viewer
	this.file_open = function(file, viewer)
	{
	- var href = '?' + $.param({_task: 'files', _action: 'open', file: file, viewer: viewer == 2 ? 1 : 0}),
	- win = window.open(href, rcmail.html_identifier('rcubefile'+file));
	-
	- if (win)
	- setTimeout(function() { win.focus(); }, 10);
	+ var href = '?' + $.param({_task: 'files', _action: 'open', file: file, viewer: viewer == 2 ? 1 : 0});
	+ rcmail.open_window(href, false, true);
	};
	};
	diff --git a/plugins/tasklist/tasklist.js b/plugins/tasklist/tasklist.js
	index 530bb25d..f24421fd 100644
	--- a/plugins/tasklist/tasklist.js
	+++ b/plugins/tasklist/tasklist.js
	@@ -1,1672 +1,1670 @@
	/**
	* Client scripts for the Tasklist plugin
	*
	* @version @package_version@
	* @author Thomas Bruederli <bruederli@kolabsys.com>
	*
	* Copyright (C) 2012, Kolab Systems AG <contact@kolabsys.com>
	*
	* This program is free software: you can redistribute it and/or modify
	* it under the terms of the GNU Affero General Public License as
	* published by the Free Software Foundation, either version 3 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 Affero General Public License for more details.
	*
	* You should have received a copy of the GNU Affero General Public License
	* along with this program. If not, see <http://www.gnu.org/licenses/>.
	*/

	function rcube_tasklist_ui(settings)
	{
	// extend base class
	rcube_libcalendaring.call(this, settings);

	/* constants */
	var FILTER_MASK_ALL = 0;
	var FILTER_MASK_TODAY = 1;
	var FILTER_MASK_TOMORROW = 2;
	var FILTER_MASK_WEEK = 4;
	var FILTER_MASK_LATER = 8;
	var FILTER_MASK_NODATE = 16;
	var FILTER_MASK_OVERDUE = 32;
	var FILTER_MASK_FLAGGED = 64;
	var FILTER_MASK_COMPLETE = 128;

	var filter_masks = {
	all: FILTER_MASK_ALL,
	today: FILTER_MASK_TODAY,
	tomorrow: FILTER_MASK_TOMORROW,
	week: FILTER_MASK_WEEK,
	later: FILTER_MASK_LATER,
	nodate: FILTER_MASK_NODATE,
	overdue: FILTER_MASK_OVERDUE,
	flagged: FILTER_MASK_FLAGGED,
	complete: FILTER_MASK_COMPLETE
	};

	/* private vars */
	var selector = 'all';
	var tagsfilter = [];
	var filtermask = FILTER_MASK_ALL;
	var loadstate = { filter:-1, lists:'', search:null };
	var idcount = 0;
	var saving_lock;
	var ui_loading;
	var taskcounts = {};
	var listindex = [];
	var listdata = {};
	var tags = [];
	var draghelper;
	var search_request;
	var search_query;
	var completeness_slider;
	var me = this;

	// general datepicker settings
	var datepicker_settings = {
	// translate from PHP format to datepicker format
	dateFormat: settings['date_format'].replace(/M/g, 'm').replace(/mmmmm/, 'MM').replace(/mmm/, 'M').replace(/dddd/, 'DD').replace(/ddd/, 'D').replace(/yy/g, 'y'),
	firstDay : settings['first_day'],
	// dayNamesMin: settings['days_short'],
	// monthNames: settings['months'],
	// monthNamesShort: settings['months'],
	changeMonth: false,
	showOtherMonths: true,
	selectOtherMonths: true
	};
	var extended_datepicker_settings;

	/* public members */
	this.tasklists = rcmail.env.tasklists;
	this.selected_task;
	this.selected_list;

	/* public methods */
	this.init = init;
	this.edit_task = task_edit_dialog;
	this.delete_task = delete_task;
	this.add_childtask = add_childtask;
	this.quicksearch = quicksearch;
	this.reset_search = reset_search;
	this.list_remove = list_remove;
	this.list_edit_dialog = list_edit_dialog;
	this.unlock_saving = unlock_saving;

	/* imports */
	var Q = this.quote_html;
	var text2html = this.text2html;
	var event_date_text = this.event_date_text;
	var parse_datetime = this.parse_datetime;
	var date2unixtime = this.date2unixtime;
	var fromunixtime = this.fromunixtime;
	var init_alarms_edit = this.init_alarms_edit;

	/**
	* initialize the tasks UI
	*/
	function init()
	{
	// initialize task list selectors
	for (var id in me.tasklists) {
	if ((li = rcmail.get_folder_li(id, 'rcmlitasklist'))) {
	init_tasklist_li(li, id);
	}

	if (me.tasklists[id].editable && !me.selected_list) {
	me.selected_list = id;
	rcmail.enable_command('addtask', true);
	$(li).click();
	}
	}

	// register server callbacks
	rcmail.addEventListener('plugin.data_ready', data_ready);
	rcmail.addEventListener('plugin.refresh_task', update_taskitem);
	rcmail.addEventListener('plugin.update_counts', update_counts);
	rcmail.addEventListener('plugin.insert_tasklist', insert_list);
	rcmail.addEventListener('plugin.update_tasklist', update_list);
	rcmail.addEventListener('plugin.destroy_tasklist', destroy_list);
	rcmail.addEventListener('plugin.reload_data', function(){ list_tasks(null); });
	rcmail.addEventListener('plugin.unlock_saving', unlock_saving);

	// start loading tasks
	fetch_counts();
	list_tasks();

	// register event handlers for UI elements
	$('#taskselector a').click(function(e){
	if (!$(this).parent().hasClass('inactive'))
	list_tasks(this.href.replace(/^.*#/, ''));
	return false;
	});

	// quick-add a task
	$(rcmail.gui_objects.quickaddform).submit(function(e){
	var tasktext = this.elements.text.value,
	rec = { id:-(++idcount), title:tasktext, readonly:true, mask:0, complete:0 };

	if (tasktext && tasktext.length) {
	save_task({ tempid:rec.id, raw:tasktext, list:me.selected_list }, 'new');
	render_task(rec);

	$('#listmessagebox').hide();
	}

	// clear form
	this.reset();
	return false;
	}).find('input[type=text]').placeholder(rcmail.gettext('createnewtask','tasklist'));

	// click-handler on tags list
	$(rcmail.gui_objects.tagslist).click(function(e){
	if (e.target.nodeName != 'LI')
	return false;

	var item = $(e.target),
	tag = item.data('value');

	// reset selection on regular clicks
	var index = $.inArray(tag, tagsfilter);
	var shift = e.shiftKey \|\| e.ctrlKey \|\| e.metaKey;

	if (!shift) {
	if (tagsfilter.length > 1)
	index = -1;

	$('li', this).removeClass('selected');
	tagsfilter = [];
	}

	// add tag to filter
	if (index < 0) {
	item.addClass('selected');
	tagsfilter.push(tag);
	}
	else if (shift) {
	item.removeClass('selected');
	var a = tagsfilter.slice(0,index);
	tagsfilter = a.concat(tagsfilter.slice(index+1));
	}

	list_tasks();

	// clear text selection in IE after shift+click
	if (shift && document.selection)
	document.selection.empty();

	e.preventDefault();
	return false;
	})
	.mousedown(function(e){
	// disable content selection with the mouse
	e.preventDefault();
	return false;
	});

	// click-handler on task list items (delegate)
	$(rcmail.gui_objects.resultlist).click(function(e){
	var item = $(e.target);
	var className = e.target.className;

	if (item.hasClass('childtoggle')) {
	item = item.parent().find('.taskhead');
	className = 'childtoggle';
	}
	else if (!item.hasClass('taskhead'))
	item = item.closest('div.taskhead');

	// ignore
	if (!item.length)
	return false;

	var id = item.data('id'),
	li = item.parent(),
	rec = listdata[id];

	switch (className) {
	case 'childtoggle':
	rec.collapsed = !rec.collapsed;
	li.children('.childtasks:first').toggle();
	$(e.target).toggleClass('collapsed').html(rec.collapsed ? '▶' : '▼');
	rcmail.http_post('tasks/task', { action:'collapse', t:{ id:rec.id, list:rec.list }, collapsed:rec.collapsed?1:0 });
	break;

	case 'complete':
	if (rcmail.busy)
	return false;

	rec.complete = e.target.checked ? 1 : 0;
	li.toggleClass('complete');
	save_task(rec, 'edit');
	return true;

	case 'flagged':
	if (rcmail.busy)
	return false;

	rec.flagged = rec.flagged ? 0 : 1;
	li.toggleClass('flagged');
	save_task(rec, 'edit');
	break;

	case 'date':
	if (rcmail.busy)
	return false;

	var link = $(e.target).html(''),
	input = $('<input type="text" size="10" />').appendTo(link).val(rec.date \|\| '')

	input.datepicker($.extend({
	onClose: function(dateText, inst) {
	if (dateText != (rec.date \|\| '')) {
	rec.date = dateText;
	save_task(rec, 'edit');
	}
	input.datepicker('destroy').remove();
	link.html(dateText \|\| rcmail.gettext('nodate','tasklist'));
	}
	}, extended_datepicker_settings)
	)
	.datepicker('setDate', rec.date)
	.datepicker('show');
	break;

	case 'delete':
	delete_task(id);
	break;

	case 'actions':
	var pos, ref = $(e.target),
	menu = $('#taskitemmenu');
	if (menu.is(':visible') && menu.data('refid') == id) {
	menu.hide();
	}
	else {
	pos = ref.offset();
	pos.top += ref.outerHeight();
	pos.left += ref.width() - menu.outerWidth();
	menu.css({ top:pos.top+'px', left:pos.left+'px' }).show();
	menu.data('refid', id);
	me.selected_task = rec;
	}
	e.bubble = false;
	break;

	default:
	if (e.target.nodeName != 'INPUT')
	task_show_dialog(id);
	break;
	}

	return false;
	})
	.dblclick(function(e){
	var id, rec, item = $(e.target);
	if (!item.hasClass('taskhead'))
	item = item.closest('div.taskhead');

	if (!rcmail.busy && item.length && (id = item.data('id')) && (rec = listdata[id])) {
	var list = rec.list && me.tasklists[rec.list] ? me.tasklists[rec.list] : {};
	if (rec.readonly \|\| !list.editable)
	task_show_dialog(id);
	else
	task_edit_dialog(id, 'edit');
	clearSelection();
	}
	});

	// handle global document clicks: close popup menus
	$(document.body).click(clear_popups);

	// extended datepicker settings
	var extended_datepicker_settings = $.extend({
	showButtonPanel: true,
	beforeShow: function(input, inst) {
	setTimeout(function(){
	$(input).datepicker('widget').find('button.ui-datepicker-close')
	.html(rcmail.gettext('nodate','tasklist'))
	.attr('onclick', '')
	.click(function(e){
	$(input).datepicker('setDate', null).datepicker('hide');
	});
	}, 1);
	}
	}, datepicker_settings);
	}

	/**
	* initialize task edit form elements
	*/
	function init_taskedit()
	{
	$('#taskedit').tabs();

	var completeness_slider_change = function(e, ui){
	var v = completeness_slider.slider('value');
	if (v >= 98) v = 100;
	if (v <= 2) v = 0;
	$('#taskedit-completeness').val(v);
	};
	completeness_slider = $('#taskedit-completeness-slider').slider({
	range: 'min',
	animate: 'fast',
	slide: completeness_slider_change,
	change: completeness_slider_change
	});
	$('#taskedit-completeness').change(function(e){
	completeness_slider.slider('value', parseInt(this.value))
	});

	// register events on alarm fields
	init_alarms_edit('#taskedit');

	$('#taskedit-date, #taskedit-startdate').datepicker(datepicker_settings);

	$('a.edit-nodate').click(function(){
	var sel = $(this).attr('rel');
	if (sel) $(sel).val('');
	return false;
	});
	}

	/**
	* Request counts from the server
	*/
	function fetch_counts()
	{
	var active = active_lists();
	if (active.length)
	rcmail.http_request('counts', { lists:active.join(',') });
	else
	update_counts({});
	}

	/**
	* List tasks matching the given selector
	*/
	function list_tasks(sel)
	{
	if (rcmail.busy)
	return;

	if (sel && filter_masks[sel] !== undefined) {
	filtermask = filter_masks[sel];
	selector = sel;
	}

	var active = active_lists(),
	basefilter = filtermask == FILTER_MASK_COMPLETE ? FILTER_MASK_COMPLETE : FILTER_MASK_ALL,
	reload = active.join(',') != loadstate.lists \|\| basefilter != loadstate.filter \|\| loadstate.search != search_query;

	if (active.length && reload) {
	ui_loading = rcmail.set_busy(true, 'loading');
	rcmail.http_request('fetch', { filter:basefilter, lists:active.join(','), q:search_query }, true);
	}
	else if (reload)
	data_ready({ data:[], lists:'', filter:basefilter, search:search_query });
	else
	render_tasklist();

	$('#taskselector li.selected').removeClass('selected');
	$('#taskselector li.'+selector).addClass('selected');
	}

	/**
	* Remove all tasks of the given list from the UI
	*/
	function remove_tasks(list_id)
	{
	// remove all tasks of the given list from index
	var newindex = $.grep(listindex, function(id, i){
	return listdata[id] && listdata[id].list != list_id;
	});

	listindex = newindex;
	render_tasklist();

	// avoid reloading
	me.tasklists[list_id].active = false;
	loadstate.lists = active_lists();
	}

	/**
	* Callback if task data from server is ready
	*/
	function data_ready(response)
	{
	listdata = {};
	listindex = [];
	loadstate.lists = response.lists;
	loadstate.filter = response.filter;
	loadstate.search = response.search;

	for (var id, i=0; i < response.data.length; i++) {
	id = response.data[i].id;
	listindex.push(id);
	listdata[id] = response.data[i];
	listdata[id].children = [];
	// register a forward-pointer to child tasks
	if (listdata[id].parent_id && listdata[listdata[id].parent_id])
	listdata[listdata[id].parent_id].children.push(id);
	}

	render_tasklist();
	append_tags(response.tags \|\| []);
	rcmail.set_busy(false, 'loading', ui_loading);
	}

	/**
	*
	*/
	function render_tasklist()
	{
	// clear display
	var id, rec,
	count = 0,
	msgbox = $('#listmessagebox').hide(),
	list = $(rcmail.gui_objects.resultlist).html('');

	for (var i=0; i < listindex.length; i++) {
	id = listindex[i];
	rec = listdata[id];
	if (match_filter(rec)) {
	render_task(rec);
	count++;
	}
	}

	fix_tree_toggles();

	if (!count)
	msgbox.html(rcmail.gettext('notasksfound','tasklist')).show();
	}

	/**
	* Show/hide child toggle buttons on all visible task items
	*/
	function fix_tree_toggles()
	{
	$('.taskitem', rcmail.gui_objects.resultlist).each(function(i,elem){
	var li = $(elem),
	rec = listdata[li.attr('rel')],
	childs = $('.childtasks li', li);

	$('.childtoggle', li)[(childs.length ? 'show' : 'hide')]();
	})
	}

	/**
	*
	*/
	function append_tags(taglist)
	{
	// find new tags
	var newtags = [];
	for (var i=0; i < taglist.length; i++) {
	if ($.inArray(taglist[i], tags) < 0)
	newtags.push(taglist[i]);
	}
	tags = tags.concat(newtags);

	// append new tags to tag cloud
	$.each(newtags, function(i, tag){
	$('<li>').attr('rel', tag).data('value', tag).html(Q(tag)).appendTo(rcmail.gui_objects.tagslist);
	});

	// re-sort tags list
	$(rcmail.gui_objects.tagslist).children('li').sortElements(function(a,b){
	return $.text([a]).toLowerCase() > $.text([b]).toLowerCase() ? 1 : -1;
	});
	}

	/**
	*
	*/
	function update_counts(counts)
	{
	// got new data
	if (counts)
	taskcounts = counts;

	// iterate over all selector links and update counts
	$('#taskselector a').each(function(i, elem){
	var link = $(elem),
	f = link.parent().attr('class').replace(/\s\w+/, '');
	if (f != 'all')
	link.children('span').html(taskcounts[f] \|\| '')[(taskcounts[f] ? 'show' : 'hide')]();
	});

	// spacial case: overdue
	$('#taskselector li.overdue')[(taskcounts.overdue ? 'removeClass' : 'addClass')]('inactive');
	}

	/**
	* Callback from server to update a single task item
	*/
	function update_taskitem(rec)
	{
	// handle a list of task records
	if ($.isArray(rec)) {
	$.each(rec, function(i,r){ update_taskitem(r); });
	return;
	}

	var id = rec.id,
	oldid = rec.tempid \|\| id,
	oldindex = $.inArray(oldid, listindex),
	list = me.tasklists[rec.list];

	if (oldindex >= 0)
	listindex[oldindex] = id;
	else
	listindex.push(id);

	listdata[id] = rec;

	// register a forward-pointer to child tasks
	if (rec.parent_id && listdata[rec.parent_id] && listdata[rec.parent_id].children && $.inArray(id, listdata[rec.parent_id].children) >= 0)
	listdata[rec.parent_id].children.push(id);

	if (list.active)
	render_task(rec, oldid);
	else
	$('li[rel="'+id+'"]', rcmail.gui_objects.resultlist).remove();

	append_tags(rec.tags \|\| []);
	fix_tree_toggles();
	}

	/**
	* Submit the given (changed) task record to the server
	*/
	function save_task(rec, action)
	{
	if (!rcmail.busy) {
	saving_lock = rcmail.set_busy(true, 'tasklist.savingdata');
	rcmail.http_post('tasks/task', { action:action, t:rec, filter:filtermask });
	$('button.ui-button:ui-button').button('option', 'disabled', rcmail.busy);
	return true;
	}

	return false;
	}

	/**
	* Remove saving lock and free the UI for new input
	*/
	function unlock_saving()
	{
	if (saving_lock) {
	rcmail.set_busy(false, null, saving_lock);
	$('button.ui-button:ui-button').button('option', 'disabled', false);
	}
	}

	/**
	* Render the given task into the tasks list
	*/
	function render_task(rec, replace)
	{
	var tags_html = '';
	for (var j=0; rec.tags && j < rec.tags.length; j++)
	tags_html += '<span class="tag">' + Q(rec.tags[j]) + '</span>';

	var div = $('<div>').addClass('taskhead').html(
	'<div class="progressbar"><div class="progressvalue" style="width:' + (rec.complete * 100) + '%"></div></div>' +
	'<input type="checkbox" name="completed[]" value="1" class="complete" ' + (rec.complete == 1.0 ? 'checked="checked" ' : '') + '/>' +
	'<span class="flagged"></span>' +
	'<span class="title">' + Q(rec.title) + '</span>' +
	'<span class="tags">' + tags_html + '</span>' +
	'<span class="date">' + Q(rec.date \|\| rcmail.gettext('nodate','tasklist')) + '</span>' +
	'<a href="#" class="actions">V</a>'
	)
	.data('id', rec.id)
	.draggable({
	revert: 'invalid',
	addClasses: false,
	cursorAt: { left:-10, top:12 },
	helper: draggable_helper,
	appendTo: 'body',
	start: draggable_start,
	stop: draggable_stop,
	revertDuration: 300
	});

	if (rec.complete == 1.0)
	div.addClass('complete');
	if (rec.flagged)
	div.addClass('flagged');
	if (!rec.date)
	div.addClass('nodate');
	if ((rec.mask & FILTER_MASK_OVERDUE))
	div.addClass('overdue');

	var li, inplace = false, parent = rec.parent_id ? $('li[rel="'+rec.parent_id+'"] > ul.childtasks', rcmail.gui_objects.resultlist) : null;
	if (replace && (li = $('li[rel="'+replace+'"]', rcmail.gui_objects.resultlist)) && li.length) {
	li.children('div.taskhead').first().replaceWith(div);
	li.attr('rel', rec.id);
	inplace = true;
	}
	else {
	li = $('<li>')
	.attr('rel', rec.id)
	.addClass('taskitem')
	.append((rec.collapsed ? '<span class="childtoggle collapsed">▶' : '<span class="childtoggle expanded">▼') + '</span>')
	.append(div)
	.append('<ul class="childtasks" style="' + (rec.collapsed ? 'display:none' : '') + '"></ul>');

	if (!parent \|\| !parent.length)
	li.appendTo(rcmail.gui_objects.resultlist);
	}

	if (!inplace && parent && parent.length)
	li.appendTo(parent);

	if (replace) {
	resort_task(rec, li, true);
	// TODO: remove the item after a while if it doesn't match the current filter anymore
	}
	}

	/**
	* Move the given task item to the right place in the list
	*/
	function resort_task(rec, li, animated)
	{
	var dir = 0, index, slice, next_li, next_id, next_rec;

	// animated moving
	var insert_animated = function(li, before, after) {
	if (before && li.next().get(0) == before.get(0))
	return; // nothing to do
	else if (after && li.prev().get(0) == after.get(0))
	return; // nothing to do

	var speed = 300;
	li.slideUp(speed, function(){
	if (before) li.insertBefore(before);
	else if (after) li.insertAfter(after);
	li.slideDown(speed);
	});
	}

	// remove from list index
	var oldlist = listindex.join('%%%');
	var oldindex = $.inArray(rec.id, listindex);
	if (oldindex >= 0) {
	slice = listindex.slice(0,oldindex);
	listindex = slice.concat(listindex.slice(oldindex+1));
	}

	// find the right place to insert the task item
	li.siblings().each(function(i, elem){
	next_li = $(elem);
	next_id = next_li.attr('rel');
	next_rec = listdata[next_id];

	if (next_id == rec.id) {
	next_li = null;
	return 1; // continue
	}

	if (next_rec && task_cmp(rec, next_rec) > 0) {
	return 1; // continue;
	}
	else if (next_rec && next_li && task_cmp(rec, next_rec) < 0) {
	if (animated) insert_animated(li, next_li);
	else li.insertBefore(next_li);
	next_li = null;
	return false;
	}
	});

	index = $.inArray(next_id, listindex);

	if (next_li) {
	if (animated) insert_animated(li, null, next_li);
	else li.insertAfter(next_li);
	index++;
	}

	// insert into list index
	if (next_id && index >= 0) {
	slice = listindex.slice(0,index);
	slice.push(rec.id);
	listindex = slice.concat(listindex.slice(index));
	}
	else { // restore old list index
	listindex = oldlist.split('%%%');
	}
	}

	/**
	* Compare function of two task records.
	* (used for sorting)
	*/
	function task_cmp(a, b)
	{
	var d = Math.floor(a.complete) - Math.floor(b.complete);
	if (!d) d = (b._hasdate-0) - (a._hasdate-0);
	if (!d) d = (a.datetime\|\|99999999999) - (b.datetime\|\|99999999999);
	return d;
	}

	/**
	*
	*/
	function get_all_childs(id)
	{
	var cid, childs = [];
	for (var i=0; listdata[id].children && i < listdata[id].children.length; i++) {
	cid = listdata[id].children[i];
	childs.push(cid);
	childs = childs.concat(get_all_childs(cid));
	}

	return childs;
	}


	/* Helper functions for drag & drop functionality */

	function draggable_helper()
	{
	if (!draghelper)
	draghelper = $('<div class="taskitem-draghelper">✔</div>');

	return draghelper;
	}

	function draggable_start(event, ui)
	{
	$('.taskhead, #rootdroppable, #'+rcmail.gui_objects.folderlist.id+' li').droppable({
	hoverClass: 'droptarget',
	accept: droppable_accept,
	drop: draggable_dropped,
	addClasses: false
	});

	$(this).parent().addClass('dragging');
	$('#rootdroppable').show();
	}

	function draggable_stop(event, ui)
	{
	$(this).parent().removeClass('dragging');
	$('#rootdroppable').hide();
	}

	function droppable_accept(draggable)
	{
	if (rcmail.busy)
	return false;

	var drag_id = draggable.data('id'),
	drop_id = $(this).data('id'),
	drag_rec = listdata[drag_id] \|\| {},
	drop_rec = listdata[drop_id];

	// drop target is another list
	if (drag_rec && $(this).data('type') == 'tasklist') {
	var drop_list = me.tasklists[drop_id],
	from_list = me.tasklists[drag_rec.list];
	return !drag_rec.parent_id && drop_id != drag_rec.list && drop_list && drop_list.editable && from_list && from_list.editable;
	}

	if (drop_rec && drop_rec.list != drag_rec.list)
	return false;

	if (drop_id == drag_rec.parent_id)
	return false;

	while (drop_rec && drop_rec.parent_id) {
	if (drop_rec.parent_id == drag_id)
	return false;
	drop_rec = listdata[drop_rec.parent_id];
	}

	return true;
	}

	function draggable_dropped(event, ui)
	{
	var drop_id = $(this).data('id'),
	task_id = ui.draggable.data('id'),
	rec = listdata[task_id],
	parent, li;

	// dropped on another list -> move
	if ($(this).data('type') == 'tasklist') {
	if (rec) {
	save_task({ id:rec.id, list:drop_id, _fromlist:rec.list }, 'move');
	rec.list = drop_id;
	}
	}
	// dropped on a new parent task or root
	else {
	parent = drop_id ? $('li[rel="'+drop_id+'"] > ul.childtasks', rcmail.gui_objects.resultlist) : $(rcmail.gui_objects.resultlist)

	if (rec && parent.length) {
	// submit changes to server
	rec.parent_id = drop_id \|\| 0;
	save_task(rec, 'edit');

	li = ui.draggable.parent();
	li.slideUp(300, function(){
	li.appendTo(parent);
	resort_task(rec, li);
	li.slideDown(300);
	fix_tree_toggles();
	});
	}
	}
	}


	/**
	* Show task details in a dialog
	*/
	function task_show_dialog(id)
	{
	var $dialog = $('#taskshow'), rec;

	if ($dialog.is(':ui-dialog'))
	$dialog.dialog('close');

	if (!(rec = listdata[id]) \|\| clear_popups({}))
	return;

	me.selected_task = rec;

	// fill dialog data
	$('#task-parent-title').html(Q(rec.parent_title \|\| '')+' »').css('display', rec.parent_title ? 'block' : 'none');
	$('#task-title').html(Q(rec.title \|\| ''));
	$('#task-description').html(text2html(rec.description \|\| '', 300, 6))[(rec.description ? 'show' : 'hide')]();
	$('#task-date')[(rec.date ? 'show' : 'hide')]().children('.task-text').html(Q(rec.date \|\| rcmail.gettext('nodate','tasklist')));
	$('#task-time').html(Q(rec.time \|\| ''));
	$('#task-start')[(rec.startdate ? 'show' : 'hide')]().children('.task-text').html(Q(rec.startdate \|\| ''));
	$('#task-starttime').html(Q(rec.starttime \|\| ''));
	$('#task-alarm')[(rec.alarms_text ? 'show' : 'hide')]().children('.task-text').html(Q(rec.alarms_text));
	$('#task-completeness .task-text').html(((rec.complete \|\| 0) * 100) + '%');
	$('#task-list .task-text').html(Q(me.tasklists[rec.list] ? me.tasklists[rec.list].name : ''));

	var taglist = $('#task-tags')[(rec.tags && rec.tags.length ? 'show' : 'hide')]().children('.task-text').empty();
	if (rec.tags && rec.tags.length) {
	$.each(rec.tags, function(i,val){
	$('<span>').addClass('tag-element').html(Q(val)).data('value', val).appendTo(taglist);
	});
	}

	// build attachments list
	$('#task-attachments').hide();
	if ($.isArray(rec.attachments)) {
	task_show_attachments(rec.attachments \|\| [], $('#task-attachments').children('.task-text'), rec);
	if (rec.attachments.length > 0) {
	$('#task-attachments').show();
	}
	}

	// define dialog buttons
	var buttons = [];
	buttons.push({
	text: rcmail.gettext('edit','tasklist'),
	click: function() {
	task_edit_dialog(me.selected_task.id, 'edit');
	},
	disabled: rcmail.busy
	});

	buttons.push({
	text: rcmail.gettext('delete','tasklist'),
	click: function() {
	if (delete_task(me.selected_task.id))
	$dialog.dialog('close');
	},
	disabled: rcmail.busy
	});

	// open jquery UI dialog
	$dialog.dialog({
	modal: false,
	resizable: true,
	closeOnEscape: true,
	title: rcmail.gettext('taskdetails', 'tasklist'),
	open: function() {
	$dialog.parent().find('.ui-button').first().focus();
	},
	close: function() {
	$dialog.dialog('destroy').appendTo(document.body);
	},
	buttons: buttons,
	minWidth: 500,
	width: 580
	}).show();

	// set dialog size according to content
	me.dialog_resize($dialog.get(0), $dialog.height(), 580);
	}

	/**
	* Opens the dialog to edit a task
	*/
	function task_edit_dialog(id, action, presets)
	{
	$('#taskshow:ui-dialog').dialog('close');

	var rec = listdata[id] \|\| presets,
	$dialog = $('<div>'),
	editform = $('#taskedit'),
	list = rec.list && me.tasklists[rec.list] ? me.tasklists[rec.list] :
	(me.selected_list ? me.tasklists[me.selected_list] : { editable: action=='new' });

	if (rcmail.busy \|\| !list.editable \|\| (action == 'edit' && (!rec \|\| rec.readonly)))
	return false;

	me.selected_task = $.extend({ alarms:'' }, rec); // clone task object
	rec = me.selected_task;

	// assign temporary id
	if (!me.selected_task.id)
	me.selected_task.id = -(++idcount);

	// reset dialog first
	$('#taskeditform').get(0).reset();

	// fill form data
	var title = $('#taskedit-title').val(rec.title \|\| '');
	var description = $('#taskedit-description').val(rec.description \|\| '');
	var recdate = $('#taskedit-date').val(rec.date \|\| '');
	var rectime = $('#taskedit-time').val(rec.time \|\| '');
	var recstartdate = $('#taskedit-startdate').val(rec.startdate \|\| '');
	var recstarttime = $('#taskedit-starttime').val(rec.starttime \|\| '');
	var complete = $('#taskedit-completeness').val((rec.complete \|\| 0) * 100);
	completeness_slider.slider('value', complete.val());
	var tasklist = $('#taskedit-tasklist').val(rec.list \|\| 0).prop('disabled', rec.parent_id ? true : false);

	// tag-edit line
	var tagline = $(rcmail.gui_objects.edittagline).empty();
	$.each(typeof rec.tags == 'object' && rec.tags.length ? rec.tags : [''], function(i,val){
	$('<input>')
	.attr('name', 'tags[]')
	.attr('tabindex', '3')
	.addClass('tag')
	.val(val)
	.appendTo(tagline);
	});

	$('input.tag', rcmail.gui_objects.edittagline).tagedit({
	animSpeed: 100,
	allowEdit: false,
	checkNewEntriesCaseSensitive: false,
	autocompleteOptions: { source: tags, minLength: 0 },
	texts: { removeLinkTitle: rcmail.gettext('removetag', 'tasklist') }
	});

	// set alarm(s)
	if (rec.alarms \|\| action != 'new') {
	if (typeof rec.alarms == 'string')
	rec.alarms = rec.alarms.split(';');

	var valarms = rec.alarms \|\| [''];
	for (var alarm, i=0; i < valarms.length; i++) {
	alarm = String(valarms[i]).split(':');
	if (!alarm[1] && alarm[0]) alarm[1] = 'DISPLAY';
	$('#taskedit select.edit-alarm-type').val(alarm[1]);

	if (alarm[0].match(/@(\d+)/)) {
	var ondate = fromunixtime(parseInt(RegExp.$1));
	$('#taskedit select.edit-alarm-offset').val('@');
	$('#taskedit input.edit-alarm-date').val(me.format_datetime(ondate, 1));
	$('#taskedit input.edit-alarm-time').val(me.format_datetime(ondate, 2));
	}
	else if (alarm[0].match(/([-+])(\d+)([MHD])/)) {
	$('#taskedit input.edit-alarm-value').val(RegExp.$2);
	$('#taskedit select.edit-alarm-offset').val(''+RegExp.$1+RegExp.$3);
	}

	break; // only one alarm is currently supported
	}
	}
	// set correct visibility by triggering onchange handlers
	$('#taskedit select.edit-alarm-type, #taskedit select.edit-alarm-offset').change();

	// attachments
	rcmail.enable_command('remove-attachment', list.editable);
	me.selected_task.deleted_attachments = [];
	// we're sharing some code for uploads handling with app.js
	rcmail.env.attachments = [];
	rcmail.env.compose_id = me.selected_task.id; // for rcmail.async_upload_form()

	if ($.isArray(rec.attachments)) {
	task_show_attachments(rec.attachments, $('#taskedit-attachments'), rec, true);
	}
	else {
	$('#taskedit-attachments > ul').empty();
	}

	// show/hide tabs according to calendar's feature support
	$('#taskedit-tab-attachments')[(list.attachments\|\|rec.attachments?'show':'hide')]();

	// activate the first tab
	$('#taskedit').tabs('select', 0);

	// define dialog buttons
	var buttons = {};
	buttons[rcmail.gettext('save', 'tasklist')] = function() {
	// copy form field contents into task object to save
	$.each({ title:title, description:description, date:recdate, time:rectime, startdate:recstartdate, starttime:recstarttime, list:tasklist }, function(key,input){
	me.selected_task[key] = input.val();
	});
	me.selected_task.tags = [];
	me.selected_task.attachments = [];

	// do some basic input validation
	if (!me.selected_task.title \|\| !me.selected_task.title.length) {
	title.focus();
	return false;
	}
	else if (me.selected_task.startdate && me.selected_task.date) {
	var startdate = $.datepicker.parseDate(datepicker_settings.dateFormat, me.selected_task.startdate, datepicker_settings);
	var duedate = $.datepicker.parseDate(datepicker_settings.dateFormat, me.selected_task.date, datepicker_settings);
	if (startdate > duedate) {
	alert(rcmail.gettext('invalidstartduedates', 'tasklist'));
	return false;
	}
	}

	$('input[type="hidden"]', rcmail.gui_objects.edittagline).each(function(i,elem){
	if (elem.value)
	me.selected_task.tags.push(elem.value);
	});

	// serialize alarm settings
	var alarm = $('#taskedit select.edit-alarm-type').val();
	if (alarm) {
	var val, offset = $('#taskedit select.edit-alarm-offset').val();
	if (offset == '@')
	me.selected_task.alarms = '@' + date2unixtime(parse_datetime($('#taskedit input.edit-alarm-time').val(), $('#taskedit input.edit-alarm-date').val())) + ':' + alarm;
	else if ((val = parseInt($('#taskedit input.edit-alarm-value').val())) && !isNaN(val) && val >= 0)
	me.selected_task.alarms = offset[0] + val + offset[1] + ':' + alarm;
	}

	// uploaded attachments list
	for (var i in rcmail.env.attachments) {
	if (i.match(/^rcmfile(.+)/))
	me.selected_task.attachments.push(RegExp.$1);
	}

	// task assigned to a new list
	if (me.selected_task.list && me.selected_task.list != rec.list) {
	me.selected_task._fromlist = rec.list;
	}

	me.selected_task.complete = complete.val() / 100;
	if (isNaN(me.selected_task.complete))
	me.selected_task.complete = null;

	if (!me.selected_task.list && list.id)
	me.selected_task.list = list.id;

	if (save_task(me.selected_task, action))
	$dialog.dialog('close');
	};

	if (action != 'new') {
	buttons[rcmail.gettext('delete', 'tasklist')] = function() {
	if (delete_task(rec.id))
	$dialog.dialog('close');
	};
	}

	buttons[rcmail.gettext('cancel', 'tasklist')] = function() {
	$dialog.dialog('close');
	};

	// open jquery UI dialog
	$dialog.dialog({
	modal: true,
	resizable: (!bw.ie6 && !bw.ie7), // disable for performance reasons
	closeOnEscape: false,
	title: rcmail.gettext((action == 'edit' ? 'edittask' : 'newtask'), 'tasklist'),
	close: function() {
	editform.hide().appendTo(document.body);
	$dialog.dialog('destroy').remove();
	},
	buttons: buttons,
	minHeight: 460,
	minWidth: 500,
	width: 580
	}).append(editform.show()); // adding form content AFTERWARDS massively speeds up opening on IE

	title.select();

	// set dialog size according to content
	me.dialog_resize($dialog.get(0), $dialog.height(), 580);
	}


	/**
	* Open a task attachment either in a browser window for inline view or download it
	*/
	function load_attachment(rec, att)
	{
	// can't open temp attachments
	if (!rec.id \|\| rec.id < 0)
	return false;

	var qstring = '_id='+urlencode(att.id)+'&_t='+urlencode(rec.recurrence_id\|\|rec.id)+'&_list='+urlencode(rec.list);

	// open attachment in frame if it's of a supported mimetype
	// similar as in app.js and calendar_ui.js
	if (att.id && att.mimetype && $.inArray(att.mimetype, settings.mimetypes)>=0) {
	- rcmail.attachment_win = window.open(rcmail.env.comm_path+'&_action=get-attachment&'+qstring+'&_frame=1', 'rcubetaskattachment');
	- if (rcmail.attachment_win) {
	- window.setTimeout(function() { rcmail.attachment_win.focus(); }, 10);
	+ if (rcmail.open_window(rcmail.env.comm_path+'&_action=get-attachment&'+qstring+'&_frame=1', true, true)) {
	return;
	}
	}

	rcmail.goto_url('get-attachment', qstring+'&_download=1', false);
	};

	/**
	* Build task attachments list
	*/
	function task_show_attachments(list, container, rec, edit)
	{
	var i, id, len, content, li, elem,
	ul = $('<ul>').addClass('attachmentslist');

	for (i=0, len=list.length; i<len; i++) {
	elem = list[i];
	li = $('<li>').addClass(elem.classname);

	if (edit) {
	rcmail.env.attachments[elem.id] = elem;
	// delete icon
	content = $('<a>')
	.attr('href', '#delete')
	.attr('title', rcmail.gettext('delete'))
	.addClass('delete')
	.click({ id:elem.id }, function(e) {
	remove_attachment(this, e.data.id);
	return false;
	});

	if (!rcmail.env.deleteicon) {
	content.html(rcmail.gettext('delete'));
	}
	else {
	$('<img>').attr('src', rcmail.env.deleteicon).attr('alt', rcmail.gettext('delete')).appendTo(content);
	}

	li.append(content);
	}

	// name/link
	$('<a>')
	.attr('href', '#load')
	.addClass('file')
	.html(elem.name).click({ task:rec, att:elem }, function(e) {
	load_attachment(e.data.task, e.data.att);
	return false;
	}).appendTo(li);

	ul.append(li);
	}

	if (edit && rcmail.gui_objects.attachmentlist) {
	ul.id = rcmail.gui_objects.attachmentlist.id;
	rcmail.gui_objects.attachmentlist = ul.get(0);
	}

	container.empty().append(ul);
	};

	/**
	*
	*/
	var remove_attachment = function(elem, id)
	{
	$(elem.parentNode).hide();
	me.selected_task.deleted_attachments.push(id);
	delete rcmail.env.attachments[id];
	};

	/**
	*
	*/
	function add_childtask(id)
	{
	if (rcmail.busy)
	return false;

	var rec = listdata[id];
	task_edit_dialog(null, 'new', { parent_id:id, list:rec.list });
	}

	/**
	* Delete the given task
	*/
	function delete_task(id)
	{
	var rec = listdata[id];
	if (!rec \|\| rec.readonly \|\| rcmail.busy)
	return false;

	var html, buttons = [{
	text: rcmail.gettext('cancel', 'tasklist'),
	click: function() {
	$(this).dialog('close');
	}
	}];

	if (rec.children && rec.children.length) {
	html = rcmail.gettext('deleteparenttasktconfirm','tasklist');
	buttons.push({
	text: rcmail.gettext('deletethisonly','tasklist'),
	click: function() {
	_delete_task(id, 0);
	$(this).dialog('close');
	}
	});
	buttons.push({
	text: rcmail.gettext('deletewithchilds','tasklist'),
	click: function() {
	_delete_task(id, 1);
	$(this).dialog('close');
	}
	});
	}
	else {
	html = rcmail.gettext('deletetasktconfirm','tasklist');
	buttons.push({
	text: rcmail.gettext('delete','tasklist'),
	click: function() {
	_delete_task(id, 0);
	$(this).dialog('close');
	}
	});
	}

	var $dialog = $('<div>').html(html);
	$dialog.dialog({
	modal: true,
	width: 520,
	dialogClass: 'warning',
	title: rcmail.gettext('deletetask', 'tasklist'),
	buttons: buttons,
	close: function(){
	$dialog.dialog('destroy').hide();
	}
	}).addClass('tasklist-confirm').show();

	return true;
	}

	/**
	* Subfunction to submit the delete command after confirm
	*/
	function _delete_task(id, mode)
	{
	var rec = listdata[id],
	li = $('li[rel="'+id+'"]', rcmail.gui_objects.resultlist).hide();

	saving_lock = rcmail.set_busy(true, 'tasklist.savingdata');
	rcmail.http_post('task', { action:'delete', t:{ id:rec.id, list:rec.list }, mode:mode, filter:filtermask });

	// move childs to parent/root
	if (mode != 1 && rec.children !== undefined) {
	var parent_node = rec.parent_id ? $('li[rel="'+rec.parent_id+'"] > .childtasks', rcmail.gui_objects.resultlist) : null;
	if (!parent_node \|\| !parent_node.length)
	parent_node = rcmail.gui_objects.resultlist;

	$.each(rec.children, function(i,cid) {
	var child = listdata[cid];
	child.parent_id = rec.parent_id;
	resort_task(child, $('li[rel="'+cid+'"]').appendTo(parent_node), true);
	});
	}

	li.remove();
	}

	/**
	* Check if the given task matches the current filtermask and tag selection
	*/
	function match_filter(rec)
	{
	var match = !filtermask \|\| (filtermask & rec.mask) > 0;

	if (match && tagsfilter.length) {
	match = rec.tags && rec.tags.length;
	for (var i=0; match && i < tagsfilter.length; i++) {
	if ($.inArray(tagsfilter[i], rec.tags) < 0)
	match = false;
	}
	}

	return match;
	}

	/**
	*
	*/
	function list_edit_dialog(id)
	{
	var list = me.tasklists[id],
	$dialog = $('#tasklistform');
	editform = $('#tasklisteditform');

	if ($dialog.is(':ui-dialog'))
	$dialog.dialog('close');

	if (!list)
	list = { name:'', editable:true, showalarms:true };

	// fill edit form
	var name = $('#taskedit-tasklistame').prop('disabled', !list.editable).val(list.editname \|\| list.name),
	alarms = $('#taskedit-showalarms').prop('checked', list.showalarms).get(0),
	parent = $('#taskedit-parentfolder').val(list.parentfolder);

	// dialog buttons
	var buttons = {};

	buttons[rcmail.gettext('save','tasklist')] = function() {
	// do some input validation
	if (!name.val() \|\| name.val().length < 2) {
	alert(rcmail.gettext('invalidlistproperties', 'tasklist'));
	name.select();
	return;
	}

	// post data to server
	var data = editform.serializeJSON();
	if (list.id)
	data.id = list.id;
	if (alarms)
	data.showalarms = alarms.checked ? 1 : 0;
	if (parent.length)
	data.parentfolder = $('option:selected', parent).val();

	saving_lock = rcmail.set_busy(true, 'tasklist.savingdata');
	rcmail.http_post('tasklist', { action:(list.id ? 'edit' : 'new'), l:data });
	$dialog.dialog('close');
	};

	buttons[rcmail.gettext('cancel','tasklist')] = function() {
	$dialog.dialog('close');
	};

	// open jquery UI dialog
	$dialog.dialog({
	modal: true,
	resizable: true,
	closeOnEscape: false,
	title: rcmail.gettext((list.id ? 'editlist' : 'createlist'), 'tasklist'),
	close: function() { $dialog.dialog('destroy').hide(); },
	buttons: buttons,
	minWidth: 400,
	width: 420
	}).show();
	}

	/**
	*
	*/
	function list_remove(id)
	{
	var list = me.tasklists[id];
	if (list && list.editable && confirm(rcmail.gettext('deletelistconfirm', 'tasklist'))) {
	saving_lock = rcmail.set_busy(true, 'tasklist.savingdata');
	rcmail.http_post('tasklist', { action:'remove', l:{ id:list.id } });
	return true;
	}
	return false;
	}

	/**
	* Callback from server to finally remove the given list
	*/
	function destroy_list(prop)
	{
	var list = me.tasklists[prop.id],
	li = rcmail.get_folder_li(prop.id, 'rcmlitasklist');

	if (li) {
	$(li).remove();
	}
	if (list) {
	list.active = false;
	// delete me.tasklists[prop.id];
	unlock_saving();
	remove_tasks(list.id);
	}
	}

	/**
	*
	*/
	function insert_list(prop)
	{
	var li = $('<li>').attr('id', 'rcmlitasklist'+prop.id)
	.append('<input type="checkbox" name="_list[]" value="'+prop.id+'" checked="checked" />')
	.append('<span class="handle"> </span>')
	.append('<span class="listname">'+Q(prop.name)+'</span>');
	$(rcmail.gui_objects.folderlist).append(li);
	me.tasklists[prop.id] = prop;
	init_tasklist_li(li.get(0), prop.id);
	}

	/**
	*
	*/
	function update_list(prop)
	{
	var id = prop.oldid \|\| prop.id,
	li = rcmail.get_folder_li(id, 'rcmlitasklist');

	if (me.tasklists[id] && li) {
	delete me.tasklists[id];
	me.tasklists[prop.id] = prop;
	$(li).data('id', prop.id);
	$('#'+li.id+' input').data('id', prop.id);
	$('.listname', li).html(Q(prop.name));
	}
	}

	/**
	* Execute search
	*/
	function quicksearch()
	{
	var q;
	if (rcmail.gui_objects.qsearchbox && (q = rcmail.gui_objects.qsearchbox.value)) {
	var id = 'search-'+q;
	var resources = [];

	for (var rid in me.tasklists) {
	if (me.tasklists[rid].active) {
	resources.push(rid);
	}
	}
	id += '@'+resources.join(',');

	// ignore if query didn't change
	if (search_request == id)
	return;

	search_request = id;
	search_query = q;

	list_tasks('all');
	}
	else // empty search input equals reset
	this.reset_search();
	}

	/**
	* Reset search and get back to normal listing
	*/
	function reset_search()
	{
	$(rcmail.gui_objects.qsearchbox).val('');

	if (search_request) {
	search_request = search_query = null;
	list_tasks();
	}
	}


	/** Utility functions **/

	/**
	* Clear any text selection
	* (text is probably selected when double-clicking somewhere)
	*/
	function clearSelection()
	{
	if (document.selection && document.selection.empty) {
	document.selection.empty() ;
	}
	else if (window.getSelection) {
	var sel = window.getSelection();
	if (sel && sel.removeAllRanges)
	sel.removeAllRanges();
	}
	}

	/**
	* Hide all open popup menus
	*/
	function clear_popups(e)
	{
	var count = 0, target = e.target;
	if (target && target.className == 'inner')
	target = e.target.parentNode;

	$('.popupmenu:visible').each(function(i, elem){
	var menu = $(elem), id = elem.id;
	if (target.id != id+'link' && (!menu.data('sticky') \|\| !target_overlaps(e.target, elem))) {
	menu.hide();
	count++;
	}
	});
	return count;
	}

	/**
	* Check whether the event target is a descentand of the given element
	*/
	function target_overlaps(target, elem)
	{
	while (target.parentNode) {
	if (target.parentNode == elem)
	return true;
	target = target.parentNode;
	}
	return false;
	}

	/**
	*
	*/
	function active_lists()
	{
	var active = [];
	for (var id in me.tasklists) {
	if (me.tasklists[id].active)
	active.push(id);
	}
	return active;
	}

	// resize and reposition (center) the dialog window
	this.dialog_resize = function(id, height, width)
	{
	var win = $(window), w = win.width(), h = win.height();
	$(id).dialog('option', { height: Math.min(h-20, height+130), width: Math.min(w-20, width+50) })
	.dialog('option', 'position', ['center', 'center']); // only works in a separate call (!?)
	};

	/**
	* Register event handlers on a tasklist (folder) item
	*/
	function init_tasklist_li(li, id)
	{
	$('#'+li.id+' input').click(function(e){
	var id = $(this).data('id');
	if (me.tasklists[id]) { // add or remove event source on click
	me.tasklists[id].active = this.checked;
	fetch_counts();
	if (!this.checked) remove_tasks(id);
	else list_tasks(null);
	rcmail.http_post('tasklist', { action:'subscribe', l:{ id:id, active:me.tasklists[id].active?1:0 } });
	}
	}).data('id', id).get(0).checked = me.tasklists[id].active \|\| false;

	$(li).click(function(e){
	var id = $(this).data('id');
	rcmail.select_folder(id, 'rcmlitasklist');
	rcmail.enable_command('list-edit', 'list-remove', 'list-import', me.tasklists[id].editable);
	me.selected_list = id;
	})
	.dblclick(function(e){
	list_edit_dialog($(this).data('id'));
	})
	.data('id', id)
	.data('type', 'tasklist')
	.addClass(me.tasklists[id].editable ? null : 'readonly');
	}


	// init dialog by default
	init_taskedit();
	}


	// extend jQuery
	// from http://james.padolsey.com/javascript/sorting-elements-with-jquery/
	jQuery.fn.sortElements = (function(){
	var sort = [].sort;

	return function(comparator, getSortable) {
	getSortable = getSortable \|\| function(){ return this };

	var last = null;
	return sort.call(this, comparator).each(function(i){
	// at this point the array is sorted, so we can just detach each one from wherever it is, and add it after the last
	var node = $(getSortable.call(this));
	var parent = node.parent();
	if (last) last.after(node);
	else parent.prepend(node);
	last = node;
	});
	};
	})();


	/* tasklist plugin UI initialization */
	var rctasks;
	window.rcmail && rcmail.addEventListener('init', function(evt) {

	rctasks = new rcube_tasklist_ui(rcmail.env.libcal_settings);

	// register button commands
	rcmail.register_command('newtask', function(){ rctasks.edit_task(null, 'new', {}); }, true);
	//rcmail.register_command('print', function(){ rctasks.print_list(); }, true);

	rcmail.register_command('list-create', function(){ rctasks.list_edit_dialog(null); }, true);
	rcmail.register_command('list-edit', function(){ rctasks.list_edit_dialog(rctasks.selected_list); }, false);
	rcmail.register_command('list-remove', function(){ rctasks.list_remove(rctasks.selected_list); }, false);

	rcmail.register_command('search', function(){ rctasks.quicksearch(); }, true);
	rcmail.register_command('reset-search', function(){ rctasks.reset_search(); }, true);

	rctasks.init();
	});

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