Turn plain text URLs into links. Supports http, https, ftp, email addresses.
// ==UserScript==
// @name Linkify Plus
// @version 2.1.4
// @namespace http://arantius.com/misc/greasemonkey/
// @description Turn plain text URLs into links. Supports http, https, ftp, email addresses.
// @include http*
// @exclude http://www.google.tld/search*
// @exclude https://www.google.tld/search*
// @exclude http://music.google.com/*
// @exclude https://music.google.com/*
// @exclude http://mail.google.com/*
// @exclude https://mail.google.com/*
// @exclude http://docs.google.com/*
// @exclude https://docs.google.com/*
// @exclude http://mxr.mozilla.org/*
// ==/UserScript==
//
// Copyright (c) 2011, Anthony Lieuallen
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
// * Neither the name of Anthony Lieuallen nor the names of its contributors
// may be used to endorse or promote products derived from this software
// without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
/*******************************************************************************
Loosely based on the Linkify script located at:
http://downloads.mozdev.org/greasemonkey/linkify.user.js
Version history:
Version 2.1.4 (Aug 12, 2012):
- Bug fix for when (only some) nodes have been removed from the document.
Version 2.1.3 (Oct 24, 2011):
- More excludes.
Version 2.1.2:
- Some bug fixes.
Version 2.1.1:
- Ignore certain "highlighter" script containers.
Version 2.1:
- Rewrite the regular expression to be more readable.
- Fix trailing "." characters.
Version 2.0.3:
- Fix infinite recursion on X(HT)ML pages.
Version 2.0.2:
- Limit @include, for greater site/plugin compatibility.
Version 2.0.1:
- Fix aberrant 'mailto:' where it does not belong.
Version 2.0:
- Apply incrementally, so the browser does not hang on large pages.
- Continually apply to new content added to the page (i.e. AJAX).
Version 1.1.4:
- Basic "don't screw up xml pretty printing" exception case
Version 1.1.3:
- Include "+" in the username of email addresses.
Version 1.1.2:
- Include "." in the username of email addresses.
Version 1.1:
- Fixed a big that caused the first link in a piece of text to
be skipped (i.e. not linkified).
*******************************************************************************/
var notInTags = [
'a', 'code', 'head', 'noscript', 'option', 'script', 'style',
'title', 'textarea'];
var textNodeXpath =
".//text()[not(ancestor::"+notInTags.join(') and not(ancestor::')+")]";
// Built based on:
// - http://en.wikipedia.org/wiki/URI_scheme
// - http://www.regular-expressions.info/regexbuddy/email.html
var urlRE = new RegExp(
'('
// leading scheme:// or "www."
+ '\\b([a-z][-a-z0-9+.]+://|www\\.)'
// everything until non-URL character
+ '[^\\s\'"<>()]+'
+ '|'
// email
+ '\\b[a-z0-9._%+-]+@[a-z0-9.-]+\\.[a-z]{2,4}\\b'
+ ')', 'gi');
var queue = [];
/******************************************************************************/
linkifyContainer(document.body);
document.body.addEventListener('DOMNodeInserted', function(event) {
linkifyContainer(event.target);
}, false);
/******************************************************************************/
function linkifyContainer(container) {
// Prevent infinite recursion, in case X(HT)ML documents with namespaces
// break the XPath's attempt to do so. (Don't evaluate spans we put our
// classname into.)
if (container.className && container.className.match(/\blinkifyplus\b/)) {
return;
}
var xpathResult = document.evaluate(
textNodeXpath, container, null,
XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE, null);
var i = 0;
function continuation() {
var node = null, counter = 0;
while (node = xpathResult.snapshotItem(i++)) {
var parent = node.parentNode;
if (!parent) continue;
// Skip styled <pre> -- often highlighted by script.
if ('PRE' == parent.tagName && parent.className) continue;
linkifyTextNode(node);
if (++counter > 50) {
return setTimeout(continuation, 0);
}
}
}
setTimeout(continuation, 0);
}
function linkifyTextNode(node) {
var i, l, m;
var txt = node.textContent;
var span = null;
var p = 0;
while (m = urlRE.exec(txt)) {
if (null == span) {
// Create a span to hold the new text with links in it.
span = document.createElement('span');
span.className = 'linkifyplus';
}
//get the link without trailing dots
l = m[0].replace(/\.*$/, '');
var lLen = l.length;
//put in text up to the link
span.appendChild(document.createTextNode(txt.substring(p, m.index)));
//create a link and put it in the span
a = document.createElement('a');
a.className = 'linkifyplus';
a.appendChild(document.createTextNode(l));
if (l.indexOf(":/") < 0) {
if (l.indexOf("@") > 0) {
l = "mailto:" + l;
} else {
l = "http://" + l;
}
}
a.setAttribute('href', l);
span.appendChild(a);
//track insertion point
p = m.index+lLen;
}
if (span) {
//take the text after the last link
span.appendChild(document.createTextNode(txt.substring(p, txt.length)));
//replace the original text with the new span
try {
node.parentNode.replaceChild(span, node);
} catch (e) {
console.error(e);
console.log(node);
}
}
}