1 // ==UserScript==
   2 // @name          Gmail bottom posting in replies
   3 // @namespace     http://henrik.nyh.se
   4 // @description   Inserts the caret _after_ the quoted text when replying to mails using Gmail. Does not work with HTML (rich text) mails.
   5 // @include       https://mail.google.tld/mail/*
   6 // @include       http://mail.google.tld/mail/*
   7 // @include       https://mail.google.tld/a/*
   8 // @include       http://mail.google.tld/a/*
   9 // ==/UserScript==
  10 
  11 document.addEventListener('focus',function(event) {
  12 
  13 	// Bail if the focused element is not a reply form
  14 	if (!event.target.id || !event.target.id.match(/^ta_\d+$/)) return;
  15 
  16 	var textarea = event.target, body = textarea.value;
  17 	
  18 	// Bail if contents don't match the default top-posting (e.g. if we modified it already)
  19 	if (!body.match(/^\n\n\w.*?:\n>/)) return;  // Matches e.g. "\n\nOn 1/2/3, Foo wrote:\n>"
  20 	
  21 	body = body.replace(/^\n\n/, '');  // Strip initial line breaks
  22 	textarea.value = body;
  23 	
  24 	var signatureBegins = body.lastIndexOf("\n-- \n");
  25 	var endOfContent = caretPosition = (signatureBegins == -1 ? body.length : signatureBegins);
  26 	
  27 	if (signatureBegins != -1) {  // There is a signature
  28 		endOfContent -= 2;
  29 		textarea.value = body.substring(0, endOfContent) + "\n" + body.substring(endOfContent);  // Add line break before signature
  30 	} else {  // There is no signature
  31 		textarea.value += "\n";  // Add line break to end
  32 	}
  33 
  34 	textarea.scrollTop = textarea.scrollHeight;  // Scroll to bottom
  35 	setTimeout(function() {  // A tiny timeout is necessary, or the caret won't move
  36 		textarea.setSelectionRange(caretPosition, caretPosition);  // Place caret at end
  37 	}, 1);
  38 	
  39 }, true);