mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/DiscussionTools
synced 2024-09-24 10:58:20 +00:00
308c2747b0
This is similar to what the JS version does. The TreeWalker and NodeFilter classes are adapted from https://github.com/Krinkle/dom-TreeWalker-polyfill (MIT license). This makes #getComments twice as fast on en-big-oldparser.html Change-Id: I2441f33e6e7bad753ac830d277e6a2e81ee8c93d
61 lines
1.5 KiB
PHP
61 lines
1.5 KiB
PHP
<?php
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namespace MediaWiki\Extension\DiscussionTools;
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use DOMNode;
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use Exception;
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/**
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* Partial implementation of W3 DOM4 NodeFilter interface.
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*
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* See also:
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* - https://dom.spec.whatwg.org/#interface-nodefilter
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*
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* Adapted from https://github.com/Krinkle/dom-TreeWalker-polyfill/blob/master/src/TreeWalker-polyfill.js
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*/
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class NodeFilter {
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// Constants for acceptNode()
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public const FILTER_ACCEPT = 1;
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public const FILTER_REJECT = 2;
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public const FILTER_SKIP = 3;
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// Constants for whatToShow
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public const SHOW_ALL = 0xFFFFFFFF;
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public const SHOW_ELEMENT = 0x1;
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public const SHOW_ATTRIBUTE = 0x2;
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public const SHOW_TEXT = 0x4;
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public const SHOW_CDATA_SECTION = 0x8;
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public const SHOW_ENTITY_REFERENCE = 0x10;
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public const SHOW_ENTITY = 0x20;
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public const SHOW_PROCESSING_INSTRUCTION = 0x40;
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public const SHOW_COMMENT = 0x80;
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public const SHOW_DOCUMENT = 0x100;
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public const SHOW_DOCUMENT_TYPE = 0x200;
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public const SHOW_DOCUMENT_FRAGMENT = 0x400;
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public const SHOW_NOTATION = 0x800;
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public $filter;
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private $active = false;
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/**
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* See https://dom.spec.whatwg.org/#dom-nodefilter-acceptnode
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*
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* @param DOMNode $node
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* @return int Constant NodeFilter::FILTER_ACCEPT,
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* NodeFilter::FILTER_REJECT or NodeFilter::FILTER_SKIP.
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*/
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public function acceptNode( $node ) {
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if ( $this->active ) {
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throw new Exception( 'DOMException: INVALID_STATE_ERR' );
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}
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$this->active = true;
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$result = call_user_func( $this->filter, $node );
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$this->active = false;
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return $result;
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}
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}
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