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193 lines
8.2 KiB
193 lines
8.2 KiB
2 years ago
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<?php
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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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* Outputs the navigation tree.
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*
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* @since Moodle 2.0
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* @package block_navigation
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* @copyright 2009 Sam Hemelryk
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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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/**
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* Renderer for block navigation
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*
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* @package block_navigation
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* @category navigation
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* @copyright 2009 Sam Hemelryk
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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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class block_navigation_renderer extends plugin_renderer_base {
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/**
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* Returns the content of the navigation tree.
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*
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* @param global_navigation $navigation
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* @param int $expansionlimit
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* @param array $options
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* @return string $content
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*/
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public function navigation_tree(global_navigation $navigation, $expansionlimit, array $options = array()) {
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$navigation->add_class('navigation_node');
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$navigationattrs = array(
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'class' => 'block_tree list',
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'role' => 'tree',
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'data-ajax-loader' => 'block_navigation/nav_loader');
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$content = $this->navigation_node(array($navigation), $navigationattrs, $expansionlimit, $options);
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if (isset($navigation->id) && !is_numeric($navigation->id) && !empty($content)) {
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$content = $this->output->box($content, 'block_tree_box', $navigation->id);
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}
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return $content;
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}
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/**
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* Produces a navigation node for the navigation tree
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*
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* @param navigation_node[] $items
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* @param array $attrs
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* @param int $expansionlimit
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* @param array $options
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* @param int $depth
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* @return string
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*/
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protected function navigation_node($items, $attrs=array(), $expansionlimit=null, array $options = array(), $depth=1) {
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// Exit if empty, we don't want an empty ul element.
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if (count($items) === 0) {
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return '';
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}
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// Turn our navigation items into list items.
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$lis = array();
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// Set the number to be static for unique id's.
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static $number = 0;
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foreach ($items as $item) {
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$number++;
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if (!$item->display && !$item->contains_active_node()) {
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continue;
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}
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$isexpandable = (empty($expansionlimit) || ($item->type > navigation_node::TYPE_ACTIVITY || $item->type < $expansionlimit) || ($item->contains_active_node() && $item->children->count() > 0));
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// Skip elements which have no content and no action - no point in showing them
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if (!$isexpandable && empty($item->action)) {
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continue;
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}
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$id = $item->id ? $item->id : html_writer::random_id();
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$content = $item->get_content();
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$title = $item->get_title();
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$ulattr = ['id' => $id . '_group', 'role' => 'group'];
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$liattr = ['class' => [$item->get_css_type(), 'depth_'.$depth]];
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$pattr = ['class' => ['tree_item'], 'role' => 'treeitem'];
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$pattr += !empty($item->id) ? ['id' => $item->id] : [];
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$isbranch = $isexpandable && ($item->children->count() > 0 || ($item->has_children() && (isloggedin() || $item->type <= navigation_node::TYPE_CATEGORY)));
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$hasicon = ((!$isbranch || $item->type == navigation_node::TYPE_ACTIVITY || $item->type == navigation_node::TYPE_RESOURCE) && $item->icon instanceof renderable);
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$icon = '';
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if ($hasicon) {
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$liattr['class'][] = 'item_with_icon';
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$pattr['class'][] = 'hasicon';
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$icon = $this->output->render($item->icon);
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// Because an icon is being used we're going to wrap the actual content in a span.
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// This will allow designers to create columns for the content, as we've done in styles.css.
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$content = $icon . html_writer::span($content, 'item-content-wrap');
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}
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if ($item->helpbutton !== null) {
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$content = trim($item->helpbutton).html_writer::tag('span', $content, array('class'=>'clearhelpbutton'));
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}
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if (empty($content)) {
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continue;
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}
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$nodetextid = 'label_' . $depth . '_' . $number;
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$attributes = array('tabindex' => '-1', 'id' => $nodetextid);
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if ($title !== '') {
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$attributes['title'] = $title;
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}
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if ($item->hidden) {
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$attributes['class'] = 'dimmed_text';
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}
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if (is_string($item->action) || empty($item->action) ||
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(($item->type === navigation_node::TYPE_CATEGORY || $item->type === navigation_node::TYPE_MY_CATEGORY) &&
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empty($options['linkcategories']))) {
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$content = html_writer::tag('span', $content, $attributes);
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} else if ($item->action instanceof action_link) {
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//TODO: to be replaced with something else
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$link = $item->action;
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$link->text = $icon.html_writer::span($link->text, 'item-content-wrap');
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$link->attributes = array_merge($link->attributes, $attributes);
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$content = $this->output->render($link);
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} else if ($item->action instanceof moodle_url) {
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$content = html_writer::link($item->action, $content, $attributes);
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}
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if ($isbranch) {
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$pattr['class'][] = 'branch';
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$liattr['class'][] = 'contains_branch';
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$pattr += ['aria-expanded' => ($item->has_children() && (!$item->forceopen || $item->collapse)) ? "false" : "true"];
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if ($item->requiresajaxloading) {
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$pattr += [
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'data-requires-ajax' => 'true',
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'data-loaded' => 'false',
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'data-node-id' => $item->id,
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'data-node-key' => $item->key,
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'data-node-type' => $item->type
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];
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} else {
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$pattr += ['aria-owns' => $id . '_group'];
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}
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}
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if ($item->isactive === true) {
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$liattr['class'][] = 'current_branch';
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}
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if (!empty($item->classes) && count($item->classes)>0) {
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$pattr['class'] = array_merge($pattr['class'], $item->classes);
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}
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$liattr['class'] = join(' ', $liattr['class']);
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$pattr['class'] = join(' ', $pattr['class']);
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$pattr += $depth == 1 ? ['data-collapsible' => 'false'] : [];
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if (isset($pattr['aria-expanded']) && $pattr['aria-expanded'] === 'false') {
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$ulattr += ['aria-hidden' => 'true'];
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}
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// Create the structure.
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$content = html_writer::tag('p', $content, $pattr);
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if ($isexpandable) {
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$content .= $this->navigation_node($item->children, $ulattr, $expansionlimit, $options, $depth + 1);
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}
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if (!empty($item->preceedwithhr) && $item->preceedwithhr===true) {
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$content = html_writer::empty_tag('hr') . $content;
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}
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$liattr['aria-labelledby'] = $nodetextid;
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$content = html_writer::tag('li', $content, $liattr);
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$lis[] = $content;
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}
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if (count($lis) === 0) {
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// There is still a chance, despite having items, that nothing had content and no list items were created.
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return '';
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}
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// We used to separate using new lines, however we don't do that now, instead we'll save a few chars.
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// The source is complex already anyway.
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return html_writer::tag('ul', implode('', $lis), $attrs);
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}
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}
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