User-script to copy the currently browsed web-page and selected content to the clipboard for pasting into org-mode

copy-org-mode-link.js

// Copyright 2018, M.A.E.
//
// Add the following as a user-script (via an extension like https://github.com/violentmonkey/violentmonkey) in order to copy the
// current webpage and selected text to the clipboard in a format suitable for pasting into an org-mode document.
// To execute the action, you need to press Alt-L on a webpage, though this can be modified by changing the keycode
// used in the onkeyup function.

// ==UserScript==
// @name Copy Org-mode Link
// @namespace Violentmonkey Scripts
// @match *://*/*
// @grant clipboardWrite
// ==/UserScript==

function main() {
  function copyTextToClipboard(text)
  {
      var textArea = document.createElement("textarea");
      textArea.style.position = 'fixed';
      textArea.style.top = 0;
      textArea.style.left = 0; 
      textArea.style.width = '2em'; 
      textArea.style.height = '2em'; 
      textArea.style.padding = 0; 
      textArea.style.border = 'none'; 
      textArea.style.outline = 'none'; 
      textArea.style.boxShadow = 'none'; 
      textArea.style.background = 'transparent'; 
      textArea.value = text; 
      document.body.appendChild(textArea); 
      textArea.select(); 
      try 
      { 
        var successful = document.execCommand('copy'); 
        var msg = successful ? 'successful' : 'unsuccessful'; 
        console.log('Copying text command was ' + msg);
      } 
      catch (err)
      {
        console.log('Oops, unable to copy');
      }
      document.body.removeChild(textArea);
  };
  
  var url = encodeURIComponent(location.href);
  url = url.replace(/%3A/g, ':').replace(/%2F/g, '/');
  var title = document.title;
  title = title.replace(/\[/g, '{'); title = title.replace(/\]/g, '}');
  // see https://unicodelookup.com for unicode values
  title = title.replace(/[\u2012]/g, "-"); // figure dash
  title = title.replace(/[\u2013]/g, "-"); // en dash
  title = title.replace(/[\u2014]/g, "--"); // em dash
  title = title.replace(/[\u00B7]/g, "-"); // dot
  title = title.replace(/[\u2019]/g, "'"); // apostrophe
  var sel_text = window.getSelection(); 
  copyTextToClipboard('[['+url+']['+title+']]'+'\n\n'+sel_text);
}

// listen for Alt-C key-combination, and then execute
document.onkeyup=function(e){
	var e = e || window.event; // for IE to cover IEs window object
    if(e.altKey && e.which == 67) {
         main();
         return false;
    }
}