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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/>.
/**
* Parse the response from the navblock ajax page and render the correct DOM
* structure for the tree from it.
*
* @module block_navigation/ajax_response_renderer
* @package core
* @copyright 2015 John Okely <john@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
define(['jquery', 'core/templates', 'core/notification', 'core/url'], function($, Templates, Notification, Url) {
// Mappings for the different types of nodes coming from the navigation.
// Copied from lib/navigationlib.php navigation_node constants.
var NODETYPE = {
// @type int Activity (course module) = 40.
ACTIVITY: 40,
// @type int Resource (course module = 50.
RESOURCE: 50,
};
/**
* Build DOM.
*
* @method buildDOM
* @param {Object} rootElement the root element of DOM.
* @param {object} nodes jquery object representing the nodes to be build.
*/
function buildDOM(rootElement, nodes) {
var ul = $('<ul></ul>');
ul.attr('role', 'group');
ul.attr('aria-hidden', true);
$.each(nodes, function(index, node) {
if (typeof node !== 'object') {
return;
}
var li = $('<li></li>');
var p = $('<p></p>');
var id = node.id || node.key + '_tree_item';
var icon = null;
var isBranch = (node.expandable || node.haschildren) ? true : false;
p.addClass('tree_item');
p.attr('id', id);
p.attr('role', 'treeitem');
// Negative tab index to allow it to receive focus.
p.attr('tabindex', '-1');
if (node.requiresajaxloading) {
p.attr('data-requires-ajax', true);
p.attr('data-node-id', node.id);
p.attr('data-node-key', node.key);
p.attr('data-node-type', node.type);
}
if (isBranch) {
li.addClass('collapsed contains_branch');
p.attr('aria-expanded', false);
p.addClass('branch');
}
var eleToAddIcon = null;
if (node.link) {
var link = $('<a title="' + node.title + '" href="' + node.link + '"></a>');
eleToAddIcon = link;
link.append('<span class="item-content-wrap">' + node.name + '</span>');
if (node.hidden) {
link.addClass('dimmed');
}
p.append(link);
} else {
var span = $('<span></span>');
eleToAddIcon = span;
span.append('<span class="item-content-wrap">' + node.name + '</span>');
if (node.hidden) {
span.addClass('dimmed');
}
p.append(span);
}
if (node.icon && (!isBranch || node.type === NODETYPE.ACTIVITY || node.type === NODETYPE.RESOURCE)) {
li.addClass('item_with_icon');
p.addClass('hasicon');
if (node.type === NODETYPE.ACTIVITY || node.type === NODETYPE.RESOURCE) {
icon = $('<img/>');
icon.attr('alt', node.icon.alt);
icon.attr('title', node.icon.title);
icon.attr('src', Url.imageUrl(node.icon.pix, node.icon.component));
$.each(node.icon.classes, function(index, className) {
icon.addClass(className);
});
eleToAddIcon.prepend(icon);
} else {
if (node.icon.component == 'moodle') {
node.icon.component = 'core';
}
Templates.renderPix(node.icon.pix, node.icon.component, node.icon.title).then(function(html) {
// Prepend.
eleToAddIcon.prepend(html);
return;
}).catch(Notification.exception);
}
}
li.append(p);
ul.append(li);
if (node.children && node.children.length) {
buildDOM(p, node.children);
} else if (isBranch && !node.requiresajaxloading) {
li.removeClass('contains_branch');
p.addClass('emptybranch');
}
});
rootElement.parent().append(ul);
var id = rootElement.attr('id') + '_group';
ul.attr('id', id);
rootElement.attr('aria-owns', id);
rootElement.attr('role', 'treeitem');
}
return {
render: function(element, nodes) {
// The first element of the response is the existing node so we start with processing the children.
if (nodes.children && nodes.children.length) {
buildDOM(element, nodes.children);
var item = element.children("[role='treeitem']").first();
var group = element.find('#' + item.attr('aria-owns'));
item.attr('aria-expanded', true);
group.attr('aria-hidden', false);
} else {
if (element.parent().hasClass('contains_branch')) {
element.parent().removeClass('contains_branch');
element.addClass('emptybranch');
}
}
}
};
});