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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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namespace core\hook\output;
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/**
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* Class before_html_attributes
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*
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* @package core
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* @copyright 2024 Andrew Lyons <andrew@nicols.co.uk>
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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* @property-read \renderer_base $renderer The page renderer object
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* @property array $attributes The list of HTML attributes to be added to the tag.
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*/
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#[\core\attribute\tags('output')]
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#[\core\attribute\label('Allows plugins to add, remove or modify any attributes of the html tag.')]
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#[\core\attribute\hook\replaces_callbacks('add_htmlattributes')]
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final class before_html_attributes {
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/**
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* Constructor for the before_html_attributes hook.
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*
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* @param \renderer_base $renderer The page renderer object
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* @param array $attributes The list of HTML attributes initially on the tag
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*/
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public function __construct(
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/** @var \renderer_base The page renderer */
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public readonly \renderer_base $renderer,
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/** @var array The list of HTML attributes initially on the tag */
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private array $attributes = [],
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) {
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}
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/**
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* Add an HTML attribute to the list.
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*
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* @param string $name
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* @param string $value
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*/
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public function add_attribute(string $name, string $value): void {
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$this->attributes[$name] = $value;
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}
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/**
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* Get the list of attributes.
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*
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* @return array
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*/
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public function get_attributes(): array {
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return $this->attributes;
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}
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/**
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* Remove an HTML attribute from the list.
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*
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* @param string $name
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*/
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public function remove_attribute(string $name): void {
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unset($this->attributes[$name]);
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}
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/**
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* Process legacy callbacks.
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*/
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public function process_legacy_callbacks(): void {
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// Legacy callback 'add_htmlattributes' is deprecated since Moodle 4.4.
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// This function should return an array of html attribute names => values.
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$pluginswithfunction = get_plugins_with_function(
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function: 'add_htmlattributes',
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migratedtohook: true,
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);
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foreach ($pluginswithfunction as $plugins) {
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foreach ($plugins as $function) {
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$newattrs = $function();
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unset($newattrs['dir']);
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unset($newattrs['lang']);
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unset($newattrs['xmlns']);
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unset($newattrs['xml:lang']);
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foreach ($newattrs as $name => $value) {
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$this->add_attribute($name, $value);
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}
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}
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}
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}
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}
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