RemoveSpansWithoutAttributes.php

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<?php

class HTMLPurifier_Injector_RemoveSpansWithoutAttributes extends HTMLPurifier_Injector
{
    public $name = 'RemoveSpansWithoutAttributes';

    public $needed = array('span');

    private $attrValidator;

    private $config;

    private $context;

    public function prepare($config, $context)
    {
        $this->attrValidator = new HTMLPurifier_AttrValidator();
        $this->config = $config;
        $this->context = $context;
        return parent::prepare($config, $context);
    }

    public function handleElement(&$token)
    {
        if ($token->name !== 'span' || !$token instanceof HTMLPurifier_Token_Start) {
            return;
        }

        // We need to validate the attributes now since this doesn't normally
        // happen until after MakeWellFormed. If all the attributes are removed
        // the span needs to be removed too.
        $this->attrValidator->validateToken($token, $this->config, $this->context);
        $token->armor['ValidateAttributes'] = true;

        if (!empty($token->attr)) {
            return;
        }

        $nesting = 0;
        while ($this->forwardUntilEndToken($i, $current, $nesting)) {
        }

        if ($current instanceof HTMLPurifier_Token_End && $current->name === 'span') {
            // Mark closing span tag for deletion
            $current->markForDeletion = true;
            // Delete open span tag
            $token = false;
        }
    }

    public function handleEnd(&$token)
    {
        if ($token->markForDeletion) {
            $token = false;
        }
    }
}

// vim: et sw=4 sts=4