<?php

/**
 * Transforms FONT tags to the proper form (SPAN with CSS styling)
 *
 * This transformation takes the three proprietary attributes of FONT and
 * transforms them into their corresponding CSS attributes.  These are color,
 * face, and size.
 *
 * @note Size is an interesting case because it doesn't map cleanly to CSS.
 *       Thanks to
 *       http://style.cleverchimp.com/font_size_intervals/altintervals.html
 *       for reasonable mappings.
 * @warning This doesn't work completely correctly; specifically, this
 *          TagTransform operates before well-formedness is enforced, so
 *          the "active formatting elements" algorithm doesn't get applied.
 */
class HTMLPurifier_TagTransform_Font extends HTMLPurifier_TagTransform
{
    /** @type string */
    public $transform_to = 'span';

    /** @type array */
    protected $_size_lookup = [
        0 => 'xx-small',
        1 => 'xx-small',
        2 => 'small',
        3 => 'medium',
        4 => 'large',
        5 => 'x-large',
        6 => 'xx-large',
        7 => '300%',
        -1 => 'smaller',
        -2 => '60%',
        '+1' => 'larger',
        '+2' => '150%',
        '+3' => '200%',
        '+4' => '300%',
    ];

    /**
     * @param HTMLPurifier_Token_Tag $tag
     * @param HTMLPurifier_Config $config
     * @param HTMLPurifier_Context $context
     * @return HTMLPurifier_Token_End|string
     */
    public function transform($tag, $config, $context)
    {
        if ($tag instanceof HTMLPurifier_Token_End) {
            $new_tag = clone $tag;
            $new_tag->name = $this->transform_to;
            return $new_tag;
        }

        $attr = $tag->attr;
        $prepend_style = '';

        // handle color transform
        if (isset($attr['color'])) {
            $prepend_style .= 'color:' . $attr['color'] . ';';
            unset($attr['color']);
        }

        // handle face transform
        if (isset($attr['face'])) {
            $prepend_style .= 'font-family:' . $attr['face'] . ';';
            unset($attr['face']);
        }

        // handle size transform
        if (isset($attr['size'])) {
            // normalize large numbers
            if ($attr['size'] !== '') {
                if ($attr['size'][0] == '+' || $attr['size'][0] == '-') {
                    $size = (int)$attr['size'];
                    if ($size < -2) {
                        $attr['size'] = '-2';
                    }
                    if ($size > 4) {
                        $attr['size'] = '+4';
                    }
                } else {
                    $size = (int)$attr['size'];
                    if ($size > 7) {
                        $attr['size'] = '7';
                    }
                }
            }
            if (isset($this->_size_lookup[$attr['size']])) {
                $prepend_style .= 'font-size:' .
                    $this->_size_lookup[$attr['size']] . ';';
            }
            unset($attr['size']);
        }

        if ($prepend_style) {
            $attr['style'] = isset($attr['style']) ?
                $prepend_style . $attr['style'] :
                $prepend_style;
        }

        $new_tag = clone $tag;
        $new_tag->name = $this->transform_to;
        $new_tag->attr = $attr;

        return $new_tag;
    }
}__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----MzQ3ODk0MDEzMzg0ODY1MiA0Njc2MDA4ODM3ODIzNTY4IDM2NTI3NjA2OTM0MDQ1ODg=