晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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Current File : /home/akaindir/www/crm/libraries/htmlpurifier/library/HTMLPurifier/AttrTransform/EnumToCSS.php
<?php

/**
 * Generic pre-transform that converts an attribute with a fixed number of
 * values (enumerated) to CSS.
 */
class HTMLPurifier_AttrTransform_EnumToCSS extends HTMLPurifier_AttrTransform {

    /**
     * Name of attribute to transform from
     */
    protected $attr;

    /**
     * Lookup array of attribute values to CSS
     */
    protected $enumToCSS = array();

    /**
     * Case sensitivity of the matching
     * @warning Currently can only be guaranteed to work with ASCII
     *          values.
     */
    protected $caseSensitive = false;

    /**
     * @param $attr String attribute name to transform from
     * @param $enumToCSS Lookup array of attribute values to CSS
     * @param $case_sensitive Boolean case sensitivity indicator, default false
     */
    public function __construct($attr, $enum_to_css, $case_sensitive = false) {
        $this->attr = $attr;
        $this->enumToCSS = $enum_to_css;
        $this->caseSensitive = (bool) $case_sensitive;
    }

    public function transform($attr, $config, $context) {

        if (!isset($attr[$this->attr])) return $attr;

        $value = trim($attr[$this->attr]);
        unset($attr[$this->attr]);

        if (!$this->caseSensitive) $value = strtolower($value);

        if (!isset($this->enumToCSS[$value])) {
            return $attr;
        }

        $this->prependCSS($attr, $this->enumToCSS[$value]);

        return $attr;

    }

}

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