a7e2b5b284
This adds an implementation of the HTML5 Tree Builder algorithm to PHP,
along with test cases from the tree builder derived from the
html5lib-tests package on github. The test cases were preprocessed
into JSON for the `domino` HTML5 parser, and we're using the JSON
form of the tests.
The implementation follows both the language of the HTML5 specification
and the implementation in `domino` very closely, easing updates if the
specification changes.
This code is used in follow-on commits to support an HTML5-based
"tidy" for mediawiki and the `{{#balance}}` parser function, which
ensures that a template expands to properly-balanced HTML, with all
tags closed and nothing left on the HTML active formatting elements
list.
See: https://github.com/fgnass/domino
Change-Id: I6f4d20a43510dd819776bb333b639315b19d150d
76 lines
2 KiB
PHP
76 lines
2 KiB
PHP
<?php
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/**
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* Convenience class for iterating over an array in reverse order.
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*
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* This program 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 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* http://www.gnu.org/copyleft/gpl.html
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*
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* @file
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* @since 1.27
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*/
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/**
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* Convenience class for iterating over an array in reverse order.
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*
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* @since 1.27
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*/
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class ReverseArrayIterator implements Iterator, Countable {
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/** @var array $array */
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protected $array;
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/**
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* Creates an iterator which will visit the keys in $array in
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* reverse order. If given an object, will visit the properties
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* of the object in reverse order. (Note that the default order
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* for PHP arrays and objects is declaration/assignment order.)
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*
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* @param array|object $array
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*/
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public function __construct( $array = [] ) {
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if ( is_array( $array ) ) {
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$this->array = $array;
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} elseif ( is_object( $array ) ) {
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$this->array = get_object_vars( $array );
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} else {
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throw new InvalidArgumentException( __METHOD__ . ' requires an array or object' );
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}
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$this->rewind();
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}
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public function current() {
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return current( $this->array );
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}
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public function key() {
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return key( $this->array );
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}
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public function next() {
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prev( $this->array );
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}
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public function rewind() {
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end( $this->array );
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}
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public function valid() {
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return key( $this->array ) !== null;
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}
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public function count() {
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return count( $this->array );
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}
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}
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