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