first upload to GitHub

manifest.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<plugin_manifest>
+	<field key="author" value="ColdTrick IT Solutions" />
+	<field key="version" value="1.0.3" />
+	<field key="description" value="Opens all external links in a new window." />
+	<field key="website" value="http://www.coldtrick.com/" />
+	<field key="copyright" value="(C) ColdTrick 2010" />
+	<field key="licence" value="GNU Public License version 2" />
+	<field key="elgg_version" value="2010040201" />
+</plugin_manifest>
+<!--
+
+Todo:
+ - Add optional forwarding window (with "you are being redirected" info)
+ - Add Preview functionality
+ - Add new window indicator ("underline" or image) 
+
+==================
+Version history
+==================
+1.0.3 (2011-04-22):
+	- changed: using jquery live function to register target blank on external links
+	
+1.0.2 (2011-04-21):
+	- changed: extend view functions updated for 1.7.x
+	- changed: moved code to js instead of metatags view
+	- fixed: target should not override target if it is already present
+	- fixed: support for https in external link
+
+1.0.1 (2010-07-02):
+	- fixed: issue with href='#' (thx elggfan)
+	- fixed: widget content will now be handled
+
+1.0 (2010-07-02):
+	- initial version
+
+-->

start.php

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+<?php 
+
+	function target_blank_init(){
+		// extend js
+		elgg_extend_view("js/initialise_elgg", "target_blank/js");
+	}
+
+	register_elgg_event_handler('init', 'system', 'target_blank_init');
+?>

test.php

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+<?php 
+
+	require_once(dirname(dirname(dirname(__FILE__))) . '/engine/start.php');
+
+	admin_gatekeeper();
+
+	$body .= "<a href='http://www.google.nl'>1</a><br/>";
+	$body .= "<a href='http://www.google.nl' style='display: none;'>1</a><br/>";
+	$body .= "<a href='https://www.google.nl'>1</a><br/>";
+	$body .= "<a href='http://www.google.nl' target='_self'>1</a><br/>";
+	$body .= "<a href='/pg/news'>1</a><br/>";
+	$body .= "<a href='#'>1</a><br/>";
+	$body .= "<a href='javascript:void(0);'>1</a><br/>";
+
+
+
+	page_draw("", $body);
+?>

views/default/target_blank/js.php

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+<?php
+/*$external_links = $('a[href^="http://"],a[href^="https://"]').not('[target], [href^="<?php echo $vars["url"];?>"]');*/ 
+?>
+$(document).ready(function(){
+	$external_links = $('a[href^="http://"]:not([target], [href^="<?php echo $vars["url"];?>"]), a[href^="https://"]:not([target], [href^="<?php echo $vars["url"];?>"])');
+
+	$external_links.live("click", function(){
+		$(this).attr("target", "_blank");
+	});
+});