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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/**
* External dependencies
*/
import { startsWith } from 'lodash';
/**
* WordPress dependencies
*/
import {
getProtocol,
isValidProtocol,
getAuthority,
isValidAuthority,
getPath,
isValidPath,
getQueryString,
isValidQueryString,
getFragment,
isValidFragment,
} from '@wordpress/url';
import { __, sprintf } from '@wordpress/i18n';
/**
* Check for issues with the provided href.
*
* @param {string} href The href.
*
* @return {boolean} Is the href invalid?
*/
export function isValidHref( href ) {
if ( ! href ) {
return false;
}
const trimmedHref = href.trim();
if ( ! trimmedHref ) {
return false;
}
// Does the href start with something that looks like a URL protocol?
if ( /^\S+:/.test( trimmedHref ) ) {
const protocol = getProtocol( trimmedHref );
if ( ! isValidProtocol( protocol ) ) {
return false;
}
// Add some extra checks for http(s) URIs, since these are the most common use-case.
// This ensures URIs with an http protocol have exactly two forward slashes following the protocol.
if ( startsWith( protocol, 'http' ) && ! /^https?:\/\/[^\/\s]/i.test( trimmedHref ) ) {
return false;
}
const authority = getAuthority( trimmedHref );
if ( ! isValidAuthority( authority ) ) {
return false;
}
const path = getPath( trimmedHref );
if ( path && ! isValidPath( path ) ) {
return false;
}
const queryString = getQueryString( trimmedHref );
if ( queryString && ! isValidQueryString( queryString ) ) {
return false;
}
const fragment = getFragment( trimmedHref );
if ( fragment && ! isValidFragment( fragment ) ) {
return false;
}
}
// Validate anchor links.
if ( startsWith( trimmedHref, '#' ) && ! isValidFragment( trimmedHref ) ) {
return false;
}
return true;
}
/**
* Generates the format object that will be applied to the link text.
*
* @param {string} url The href of the link.
* @param {boolean} opensInNewWindow Whether this link will open in a new window.
* @param {Object} text The text that is being hyperlinked.
*
* @return {Object} The final format object.
*/
export function createLinkFormat( { url, opensInNewWindow, text, noFollow, isSponsored } ) {
const format = {
type: 'core/link',
attributes: {
url,
},
};
format.attributes.rel = '';
if ( noFollow ) {
format.attributes.rel += 'nofollow noindex ';
}
if ( isSponsored ) {
format.attributes.rel += 'sponsored ';
}
if ( opensInNewWindow ) {
// translators: accessibility label for external links, where the argument is the link text
const label = sprintf( __( '%s (opens in a new tab)' ), text );
format.attributes.target = '_blank';
format.attributes.rel += 'noreferrer noopener';
format.attributes[ 'aria-label' ] = label;
}
if ( '' === format.attributes.rel ) {
delete format.attributes.rel;
}
return format;
}