vendor/ezyang/htmlpurifier/library/HTMLPurifier/CSSDefinition.php

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<?php

/**
 * Defines allowed CSS attributes and what their values are.
 * @see HTMLPurifier_HTMLDefinition
 */
class HTMLPurifier_CSSDefinition extends HTMLPurifier_Definition
{

    public $type = 'CSS';

    /**
     * Assoc array of attribute name to definition object.
     * @type HTMLPurifier_AttrDef[]
     */
    public $info = array();

    /**
     * Constructs the info array.  The meat of this class.
     * @param HTMLPurifier_Config $config
     */
    protected function doSetup($config)
    {
        $this->info['text-align'] = new HTMLPurifier_AttrDef_Enum(
            array('left', 'right', 'center', 'justify'),
            false
        );

        $border_style =
            $this->info['border-bottom-style'] =
            $this->info['border-right-style'] =
            $this->info['border-left-style'] =
            $this->info['border-top-style'] = new HTMLPurifier_AttrDef_Enum(
                array(
                    'none',
                    'hidden',
                    'dotted',
                    'dashed',
                    'solid',
                    'double',
                    'groove',
                    'ridge',
                    'inset',
                    'outset'
                ),
                false
            );

        $this->info['border-style'] = new HTMLPurifier_AttrDef_CSS_Multiple($border_style);

        $this->info['clear'] = new HTMLPurifier_AttrDef_Enum(
            array('none', 'left', 'right', 'both'),
            false
        );
        $this->info['float'] = new HTMLPurifier_AttrDef_Enum(
            array('none', 'left', 'right'),
            false
        );
        $this->info['font-style'] = new HTMLPurifier_AttrDef_Enum(
            array('normal', 'italic', 'oblique'),