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https://github.com/renbaoshuo/S2OJ.git
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96d4a3ecf7
Due to historical reasons, the code is in subfolder "1". With SVN removal, we place the code back and remove the annoying "1" folder.
102 lines
3.0 KiB
PHP
102 lines
3.0 KiB
PHP
<?php
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class HTMLPurifier_Injector_RemoveEmpty extends HTMLPurifier_Injector
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{
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/**
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* @type HTMLPurifier_Context
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*/
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private $context;
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/**
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* @type HTMLPurifier_Config
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*/
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private $config;
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/**
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* @type HTMLPurifier_AttrValidator
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*/
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private $attrValidator;
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/**
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* @type bool
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*/
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private $removeNbsp;
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/**
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* @type bool
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*/
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private $removeNbspExceptions;
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/**
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* @type array
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* TODO: make me configurable
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*/
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private $_exclude = array('colgroup' => 1, 'th' => 1, 'td' => 1, 'iframe' => 1);
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/**
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* @param HTMLPurifier_Config $config
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* @param HTMLPurifier_Context $context
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* @return void
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*/
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public function prepare($config, $context)
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{
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parent::prepare($config, $context);
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$this->config = $config;
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$this->context = $context;
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$this->removeNbsp = $config->get('AutoFormat.RemoveEmpty.RemoveNbsp');
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$this->removeNbspExceptions = $config->get('AutoFormat.RemoveEmpty.RemoveNbsp.Exceptions');
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$this->attrValidator = new HTMLPurifier_AttrValidator();
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}
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/**
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* @param HTMLPurifier_Token $token
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*/
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public function handleElement(&$token)
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{
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if (!$token instanceof HTMLPurifier_Token_Start) {
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return;
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}
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$next = false;
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$deleted = 1; // the current tag
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for ($i = count($this->inputZipper->back) - 1; $i >= 0; $i--, $deleted++) {
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$next = $this->inputZipper->back[$i];
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if ($next instanceof HTMLPurifier_Token_Text) {
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if ($next->is_whitespace) {
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continue;
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}
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if ($this->removeNbsp && !isset($this->removeNbspExceptions[$token->name])) {
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$plain = str_replace("\xC2\xA0", "", $next->data);
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$isWsOrNbsp = $plain === '' || ctype_space($plain);
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if ($isWsOrNbsp) {
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continue;
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}
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}
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}
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break;
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}
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if (!$next || ($next instanceof HTMLPurifier_Token_End && $next->name == $token->name)) {
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if (isset($this->_exclude[$token->name])) {
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return;
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}
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$this->attrValidator->validateToken($token, $this->config, $this->context);
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$token->armor['ValidateAttributes'] = true;
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if (isset($token->attr['id']) || isset($token->attr['name'])) {
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return;
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}
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$token = $deleted + 1;
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for ($b = 0, $c = count($this->inputZipper->front); $b < $c; $b++) {
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$prev = $this->inputZipper->front[$b];
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if ($prev instanceof HTMLPurifier_Token_Text && $prev->is_whitespace) {
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continue;
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}
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break;
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}
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// This is safe because we removed the token that triggered this.
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$this->rewindOffset($b+$deleted);
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return;
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}
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}
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}
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// vim: et sw=4 sts=4
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