// ==UserScript==
// @name         irccloud formatting helper
// @namespace    http://example.com/
// @version      0.1
// @description  Intercept ctrl+i and ctrl+b on irccloud and add the relevant
//               control characters.
// @author       Steve Howard
// @match        https://www.irccloud.com/*
// @grant        none
// ==/UserScript==
/* jshint -W097 */
'use strict';
/**
* formatHelper: String -> String
* Converts IRC control characters to HTML tags to preview formatting
*/
function formatForBrowser (str) {
var controlCharRegex = /(\x1d|\x02)/g;
var pieces = str.split(controlCharRegex);
var output = [];
var bold = false, italic = false;
for (var i = 0, end = pieces.length; i < end; ++i) {
var piece = pieces[i];
if (piece.match(/\x1d/)) {
italic = !italic;
output.push(italic ? '<i>' : '</i>');
}
else if (piece.match(/\x02/)) {
bold = !bold;
output.push(bold ? '<b>' : '</b>');
}
else {
output.push(piece);
}
}
return output.join('');
}
/**
* createOverlay: Node -> Node
* Creates a div that copies the same
*/
function createOverlay (msg) {
var o = document.createElement('div');
o.style.width = msg.style.width;
o.style.height = msg.style.height;
o.style.whiteSpace = 'pre';
o.addEventListener('click', function () {
msg.focus();
});
msg.addEventListener('keyup', function () {
// Can't just make this a global variable because RegExps store state
var controlCharRegex = /(\x1d|\x02)/g;
if (controlCharRegex.test(msg.value)) {
// If there were control characters, use the overlay/side by side view to preview message
// Easier to check the contents than inspect the state from the above; clears itself when necessary
o.innerHTML = formatForBrowser(msg.value);
o.style.display = 'block';
}
else {
// otherwise the text box by itself is much faster
o.style.display = 'none';
}
});
return o;
}
function main (msg) {
var overlay = createOverlay(msg);
msg.parentNode.appendChild(overlay);
function keyHandler (e) {
function emitControlCharacter (c) {
var st = msg.selectionStart, en = msg.selectionEnd;
// check for text selection. If so, insert control character twice
if (st < en) {
var val = msg.value;
msg.value = val.substring(0, st) + c + val.substring(st, en) + c + val.substring(en);
}
else {
msg.value += c;
}
}
if (e.ctrlKey) {
switch (e.keyCode) {
case 73: // 'i'
emitControlCharacter('\x1d');
break;
case 66: // 'b'
emitControlCharacter('\x02');
break;
}
}
}
msg.addEventListener('keyup', keyHandler);
}
(function () {
var initialized = {};
var observer = new MutationObserver(function (mutations) {
mutations.forEach(function (mutation) {
Array.from(mutation.addedNodes).forEach(function (node) {
var msg = node.querySelector && node.querySelector('[name=msg]');
if (msg && !initialized[msg.id]) {
main(msg);
initialized[msg.id] = true;
}
});
});
});
observer.observe(document.body, { childList: true, subtree: true });
})();