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// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* JavaScript library for dealing with the question flags.
*
* This script, and the YUI libraries that it needs, are inluded by
* the $PAGE->requires->js calls in question_get_html_head_contributions in lib/questionlib.php.
*
* @package moodlecore
* @subpackage questionengine
* @copyright 2010 The Open University
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
M.core_question_flags = {
flagattributes: null,
actionurl: null,
listeners: [],
init: function(Y, actionurl, flagattributes) {
M.core_question_flags.flagattributes = flagattributes;
M.core_question_flags.actionurl = actionurl;
Y.all('div.questionflag').each(function(flagdiv, i) {
var checkbox = flagdiv.one('input[type=checkbox]');
if (!checkbox) {
return;
}
var input = Y.Node.create('<input type="hidden" class="questionflagvalue" />');
input.set('id', checkbox.get('id'));
input.set('name', checkbox.get('name'));
input.set('value', checkbox.get('checked') ? 1 : 0);
var ariaPressed = checkbox.get('checked') ? 'true' : 'false';
var toggle = Y.Node.create('<a ' +
'tabindex="0" ' +
'class="aabtn" ' +
'role="button" ' +
'aria-pressed="' + ariaPressed + '">' +
'.' +
'</a>');
M.core_question_flags.update_flag(input, toggle);
checkbox.remove();
flagdiv.one('label').remove();
flagdiv.append(input);
flagdiv.append(toggle);
});
Y.delegate('click', function(e) {
e.halt();
M.core_question_flags.process(this);
}, document.body, 'div.questionflag');
Y.delegate('key', function(e) {
e.halt();
if (e.keyCode == 13) {
M.core_question_flags.process(this);
}
}, document.body, 'down:enter, space', 'div.questionflag');
Y.delegate('key', function(e) {
e.halt();
M.core_question_flags.process(this);
}, document.body, 'up:space', 'div.questionflag');
},
update_flag: function(input, toggle) {
var value = input.get('value');
toggle.setContent(
'<img class="questionflagimage" src="' + M.core_question_flags.flagattributes[value].src + '" alt="" />' +
M.core_question_flags.flagattributes[value].text
);
toggle.set('aria-pressed', parseInt(value) ? 'true' : 'false');
toggle.set('aria-label', M.core_question_flags.flagattributes[value].alt);
if (M.core_question_flags.flagattributes[value].title != M.core_question_flags.flagattributes[value].text) {
toggle.set('title', M.core_question_flags.flagattributes[value].title);
} else {
toggle.removeAttribute('title');
}
},
/**
* Process the change of flag status.
*
* @param {Y.Node} target The root element
*/
process: function(target) {
var input = target.one('input.questionflagvalue');
input.set('value', 1 - input.get('value'));
M.core_question_flags.update_flag(input, target.one('[aria-pressed]'));
var postdata = target.one('input.questionflagpostdata').get('value') +
input.get('value');
Y.io(M.core_question_flags.actionurl, {method: 'POST', 'data': postdata});
M.core_question_flags.fire_listeners(postdata);
},
add_listener: function(listener) {
M.core_question_flags.listeners.push(listener);
},
fire_listeners: function(postdata) {
for (var i = 0; i < M.core_question_flags.listeners.length; i++) {
M.core_question_flags.listeners[i](
postdata.match(/\bqubaid=(\d+)\b/)[1],
postdata.match(/\bslot=(\d+)\b/)[1],
postdata.match(/\bnewstate=(\d+)\b/)[1]
);
}
}
};