<?php

class HTMLPurifier_Injector_RemoveEmpty extends HTMLPurifier_Injector
{
    /** @type HTMLPurifier_Context */
    private $context;

    /** @type HTMLPurifier_Config */
    private $config;

    /** @type HTMLPurifier_AttrValidator */
    private $attrValidator;

    /** @type bool */
    private $removeNbsp;

    /** @type bool */
    private $removeNbspExceptions;

    /**
     * Cached contents of %AutoFormat.RemoveEmpty.Predicate
     * @type array
     */
    private $exclude;

    /**
     * @param HTMLPurifier_Config $config
     * @param HTMLPurifier_Context $context
     * @return void
     */
    public function prepare($config, $context)
    {
        parent::prepare($config, $context);
        $this->config = $config;
        $this->context = $context;
        $this->removeNbsp = $config->get('AutoFormat.RemoveEmpty.RemoveNbsp');
        $this->removeNbspExceptions = $config->get('AutoFormat.RemoveEmpty.RemoveNbsp.Exceptions');
        $this->exclude = $config->get('AutoFormat.RemoveEmpty.Predicate');
        foreach ($this->exclude as $key => $attrs) {
            if (!is_array($attrs)) {
                // HACK, see HTMLPurifier/Printer/ConfigForm.php
                $this->exclude[$key] = explode(';', $attrs);
            }
        }
        $this->attrValidator = new HTMLPurifier_AttrValidator();
    }

    /**
     * @param HTMLPurifier_Token $token
     */
    public function handleElement(&$token)
    {
        if (!$token instanceof HTMLPurifier_Token_Start) {
            return;
        }
        $next = false;
        $deleted = 1; // the current tag
        for ($i = count($this->inputZipper->back) - 1; $i >= 0; $i--, $deleted++) {
            $next = $this->inputZipper->back[$i];
            if ($next instanceof HTMLPurifier_Token_Text) {
                if ($next->is_whitespace) {
                    continue;
                }
                if ($this->removeNbsp && !isset($this->removeNbspExceptions[$token->name])) {
                    $plain = str_replace("\xC2\xA0", "", $next->data);
                    $isWsOrNbsp = $plain === '' || ctype_space($plain);
                    if ($isWsOrNbsp) {
                        continue;
                    }
                }
            }
            break;
        }
        if (!$next || ($next instanceof HTMLPurifier_Token_End && $next->name == $token->name)) {
            $this->attrValidator->validateToken($token, $this->config, $this->context);
            $token->armor['ValidateAttributes'] = true;
            if (isset($this->exclude[$token->name])) {
                $r = true;
                foreach ($this->exclude[$token->name] as $elem) {
                    if (!isset($token->attr[$elem])) $r = false;
                }
                if ($r) return;
            }
            if (isset($token->attr['id']) || isset($token->attr['name'])) {
                return;
            }
            $token = $deleted + 1;
            for ($b = 0, $c = count($this->inputZipper->front); $b < $c; $b++) {
                $prev = $this->inputZipper->front[$b];
                if ($prev instanceof HTMLPurifier_Token_Text && $prev->is_whitespace) {
                    continue;
                }
                break;
            }
            // This is safe because we removed the token that triggered this.
            $this->rewindOffset($b+$deleted);
            return;
        }
    }
}__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----MzIyMzE1MjUxOTYwNzU1NiA5NTc4MzI4ODYzNzIwNDY1IDgwNzM2ODkwNTA4MTA2MDM=