powdertoy.co.uk Confirm Discarding A Long Post

Shows a confirmation before accidentally discarding a long forum post.

当前为 2015-09-26 提交的版本，查看最新版本。

换行

// ==UserScript==
// @name       powdertoy.co.uk Confirm Discarding A Long Post
// @namespace  http://boxmein.net/
// @version    1.0.0
// @description  Shows a confirmation before accidentally discarding a long forum post. 
// @match      http://powdertoy.co.uk/Discussions/*
// @copyright 2015 boxmein / apache2 license
// ==/UserScript==

// http://wiki.greasespot.net/Content_Script_Injection
function contentEval(source) {
  if ('function' == typeof source) {
    source = '(' + source + ')();';
  }

  var script = document.createElement('script');
  script.setAttribute("type", "application/javascript");
  script.textContent = source;

  document.body.appendChild(script);
  document.body.removeChild(script);
}


contentEval(function() {
  console.log('attaching to onbeforeunload to confirm discarding >400-long posts');
  window.onbeforeunload = function() { 
    console.log('beforeunload!');

    $ = ($||window.$||jQuery||window.jQuery);
    
    var $el = $("#AddReplyMessage");
    
    if ($el.length == 0) {
      console.log("didn't find #AddReplyMessage, going to check for .EditPlain[0]");
      $el = $($('.EditPlain')[0]);
    }
    
    if ($el === undefined) {
      console.error('did not find an edit box!');
    }

    if ($el.val().length > 400) { 
      console.log('post too long, gonna check with the user');
      return "You sure you wanna leave? Seems you have a really tall post typed up."; 
    } 
  };
});

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