hexo/lib/plugins/tag/link.js

A fast, simple & powerful blog framework, powered by Node.js.

var util = require('../../util'),
  htmlTag = util.html_tag;

var rUrl = /((([A-Za-z]{3,9}:(?:\/\/)?)(?:[-;:&=\+\$,\w]+@)?[A-Za-z0-9.-]+|(?:www.|[-;:&=\+\$,\w]+@)[A-Za-z0-9.-]+)((?:\/[\+~%\/.\w-_]*)?\??(?:[-\+=&;%@.\w_]*)#?(?:[.\!\/\\w]*))?)/;

/**
* Link tag
*
* Syntax:
*   {% link text url [external] [title] %}
*/

module.exports = function(args, content){
  var url = '',
    text = [],
    external = false,
    title = '';

  // Find link URL and text
  for (var i = 0, len = args.length; i < len; i++){
    var item = args[i];

    if (rUrl.test(item)){
      url = item;
      break;
    } else {
      text.push(item);
    }
  }

  // Delete link URL and text from arguments
  args = args.slice(i + 1);

  // Check if the link should be open in a new window
  // and collect the last text as the link title
  if (args.length){
    var shift = args[0];

    if (shift === 'true' || shift === 'false'){
      external = shift === 'true' ? true : false;
      args.shift();
    }

    title = args.join(' ');
  }

  var attrs = {
    href: url,
    title: title,
    target: external ? '_blank' : ''
  };

  return htmlTag('a', attrs, text.join(' '));
};