User:Kephir/gadgets/preview.js
Appearance
Code that you insert on this page could contain malicious content capable of compromising your account. If you import a script from another page with "importScript", "mw.loader.load", "iusc", or "lusc", take note that this causes you to dynamically load a remote script, which could be changed by others. Editors are responsible for all edits and actions they perform, including by scripts. User scripts are not centrally supported and may malfunction or become inoperable due to software changes. A guide to help you find broken scripts is available. If you are unsure whether code you are adding to this page is safe, you can ask at the appropriate village pump. This code will be executed when previewing this page. |
![]() | This user script seems to have a documentation page at User:Kephir/gadgets/preview and an accompanying .css page at User:Kephir/gadgets/preview.css. |
// more info: [[User:Kephir/gadgets/preview]]
/*jshint undef:true, boss:true, loopfunc:true */
/*global mw, jQuery, importStylesheetURI */
if ((mw.config.get('wgAction') === 'edit') || (mw.config.get('wgAction') === 'submit'))
mw.loader.using([/* nothing for now, but you never know */], function () {
"use strict";
function md5(s) {
/*
* md5 implementation in JavaScript.
* I mourn the wasted CPU cycles.
*/
function rol(x, n) {
return ((x << n) | (x >>> (32 - n)));
}
function pad(s) {
while (s.length < 8) s = '0' + s;
return s;
}
function preprocess(s) {
if (window.TextEncoder) { // encoding.spec.whatwg.org — I assume using it is a bit faster.
/*global TextEncoder */
var encoder = new TextEncoder("utf-8");
var octets = encoder.encode(s);
var grown = new Uint8Array((octets.length + 8) + 64 - ((octets.length + 8) % 64));
grown.set(octets, 0);
grown[octets.length] = 0x80;
grown.set([
(octets.length << 3) & 0xff,
(octets.length >>> 5) & 0xff,
(octets.length >>> 13) & 0xff,
(octets.length >>> 21) & 0xff,
(octets.length >>> 29) & 0xff,
0, // (octets.length >>> 37) & 0xff,
0, // (octets.length >>> 45) & 0xff,
0, // (octets.length >>> 53) & 0xff
], grown.length - 8);
return grown;
}
// fall back to array implementation
var r = [];
for (var i = 0; i < s.length; ++i) {
var c = s.charCodeAt(i);
if ((c >= 0xd800) && (c <= 0xdbff)) {
var d = s.charCodeAt(++i);
if (!((d >= 0xdc00) && (d <= 0xdfff))) // not a paired surrogate?
throw new Error("Invalid UTF-16 at " + i);
c = ((c & 0x3ff) << 10) | (d & 0x3ff);
} else if ((c >= 0xdc00) && (c <= 0xdfff))
throw new Error("Invalid UTF-16 at " + i);
if (c < 128) {
r.push(s.charAt(i));
} else if (c < 0x800) {
r.push(
0xc0 | (c >>> 6) ,
0x80 | ( c & 0x3f)
);
} else if (c < 0x10000) {
r.push(
0xe0 | (c >>> 12) ,
0x80 | ((c >>> 6) & 0x3f),
0x80 | ( c & 0x3f)
);
} else if (c < 0x200000) {
r.push(
0xf0 | (c >>> 18) ,
0x80 | ((c >>> 12) & 0x3f),
0x80 | ((c >>> 6) & 0x3f),
0x80 | ( c & 0x3f)
);
} else if (c < 0x4000000) {
r.push(
0xf8 | (c >>> 24) ,
0x80 | ((c >>> 18) & 0x3f),
0x80 | ((c >>> 12) & 0x3f),
0x80 | ((c >>> 6) & 0x3f),
0x80 | ( c & 0x3f)
);
} else if (c < 0x80000000) {
r.push(
0xfc | (c >>> 30) ,
0x80 | ((c >>> 24) & 0x3f),
0x80 | ((c >>> 18) & 0x3f),
0x80 | ((c >>> 12) & 0x3f),
0x80 | ((c >>> 6) & 0x3f),
0x80 | ( c & 0x3f)
);
} else
throw new Error("Impossible code point: U+" + c.toString(16));
}
var ol = r.length;
r.push(0x80);
while ((r.length % 64) !== 56) r.push(0);
r.push(
(ol << 3) & 0xff,
(ol >>> 5) & 0xff,
(ol >>> 13) & 0xff,
(ol >>> 21) & 0xff,
(ol >>> 29) & 0xff,
0, // (ol >>> 37) & 0xff,
0, // (ol >>> 45) & 0xff,
0 // (ol >>> 53) & 0xff
);
return r;
}
var r = [
7, 12, 17, 22, 7, 12, 17, 22, 7, 12, 17, 22, 7, 12, 17, 22,
5, 9, 14, 20, 5, 9, 14, 20, 5, 9, 14, 20, 5, 9, 14, 20,
4, 11, 16, 23, 4, 11, 16, 23, 4, 11, 16, 23, 4, 11, 16, 23,
6, 10, 15, 21, 6, 10, 15, 21, 6, 10, 15, 21, 6, 10, 15, 21
];
var k = [
0xd76aa478, 0xe8c7b756, 0x242070db, 0xc1bdceee,
0xf57c0faf, 0x4787c62a, 0xa8304613, 0xfd469501,
0x698098d8, 0x8b44f7af, 0xffff5bb1, 0x895cd7be,
0x6b901122, 0xfd987193, 0xa679438e, 0x49b40821,
0xf61e2562, 0xc040b340, 0x265e5a51, 0xe9b6c7aa,
0xd62f105d, 0x02441453, 0xd8a1e681, 0xe7d3fbc8,
0x21e1cde6, 0xc33707d6, 0xf4d50d87, 0x455a14ed,
0xa9e3e905, 0xfcefa3f8, 0x676f02d9, 0x8d2a4c8a,
0xfffa3942, 0x8771f681, 0x6d9d6122, 0xfde5380c,
0xa4beea44, 0x4bdecfa9, 0xf6bb4b60, 0xbebfbc70,
0x289b7ec6, 0xeaa127fa, 0xd4ef3085, 0x04881d05,
0xd9d4d039, 0xe6db99e5, 0x1fa27cf8, 0xc4ac5665,
0xf4292244, 0x432aff97, 0xab9423a7, 0xfc93a039,
0x655b59c3, 0x8f0ccc92, 0xffeff47d, 0x85845dd1,
0x6fa87e4f, 0xfe2ce6e0, 0xa3014314, 0x4e0811a1,
0xf7537e82, 0xbd3af235, 0x2ad7d2bb, 0xeb86d391
];
var h0 = 0x67452301, h1 = 0xefcdab89, h2 = 0x98badcfe, h3 = 0x10325476;
s = preprocess(s);
for (var off = 0; off < s.length; off += 64) {
var a = h0, b = h1, c = h2, d = h3;
var w = [];
for (var i = 0; i < 16; ++i) {
w[i] = s[off + i * 4] | (s[off + i * 4 + 1] << 8) | (s[off + i * 4 + 2] << 16) | (s[off + i * 4 + 3] << 24);
}
for (var i = 0; i < 64; ++i) {
var f = 0, g = 0;
switch (i >>> 4) {
case 0:
f = (b & c) | ((~b) & d);
g = i;
break;
case 1:
f = (b & d) | ((~d) & c);
g = (5 * i + 1) & 0xf;
break;
case 2:
f = b ^ c ^ d;
g = (3 * i + 5) & 0xf;
break;
case 3:
f = c ^ (b | (~d));
g = (7 * i ) & 0xf;
break;
}
var t = d;
d = c;
c = b;
b = (b + rol(a + f + k[i] + w[g], r[i])) & 0xffffffff;
a = t;
}
h0 = (h0 + a) & 0xffffffff;
h1 = (h1 + b) & 0xffffffff;
h2 = (h2 + c) & 0xffffffff;
h3 = (h3 + d) & 0xffffffff;
}
return (pad((h3 >>> 0).toString(16)) + pad((h2 >>> 0).toString(16)) + pad((h1 >>> 0).toString(16)) + pad((h0 >>> 0).toString(16))).match(/[0-9a-f][0-9a-f]/gi).reverse().join('');
}
mw.loader.load('//wiki.riteme.site/w/index.php?title=User:Kephir/gadgets/preview.css&action=raw&ctype=text/css&smaxage=21600&maxage=86400', 'text/css');
if (mw.user.options.get('forceeditsummary') === '1') {
var editform = document.getElementById('editform');
var sum = document.getElementById('wpSummary');
var sumsum = editform.wpAutoSummary.value;
var tried = false;
var button = null;
sum.addEventListener('change', function (ev) {
tried = true;
}, false);
var inputs = editform.getElementsByTagName('input');
for (var i = 0; i < inputs.length; ++i) {
inputs[i].addEventListener('click', function (ev) {
button = this;
}, false);
}
editform.addEventListener('submit', function (ev) {
if (button !== editform.wpSave) {
return false;
}
if (!tried && md5(sum.value) === sumsum) {
if (!sum.parentNode)
return false; // whatever.
ev.preventDefault();
ev.stopPropagation();
var warn = document.createElement('div');
warn.style.position = 'absolute';
warn.style.left = sum.offsetLeft + 'px';
warn.style.top = (sum.offsetTop + sum.offsetHeight) + 'px';
warn.style.border = '1px solid red';
warn.style.background = 'white';
warn.style.color = 'black';
warn.style.padding = '0.2em';
warn.style.fontSize = 'smaller';
warn.appendChild(document.createTextNode('You have not provided an edit summary. If you click "Save page" again, your edit will be saved without one.'));
warn.addEventListener('click', function (ev) {
jQuery(this).fadeOut();
});
setTimeout(function () {
jQuery(warn).fadeOut();
}, 3000);
sum.parentNode.appendChild(warn);
sum.focus();
tried = true;
}
}, false);
var blocker = document.createElement('input');
blocker.type = 'hidden';
blocker.name = 'wpIgnoreBlankSummary';
blocker.value = '1';
editform.appendChild(blocker);
}
});