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New module 'External Links'

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Manuel Cillero 2017-07-26 13:24:28 +02:00
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GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
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Yoyodyne, Inc., hereby disclaims all copyright interest in the program
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This General Public License does not permit incorporating your program into
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consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License.

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The External Links module is a very simple approach to adding icons to links
to external websites or e-mail addresses. It is a purely JavaScript
implementation, so the icons are only shown to users that have JavaScript
enabled.
Fivestar was written by Nathan Haug. Built by Robots: http://www.lullabot.com
Install
-------
Simply instal External Links like you would any other module.
1) Copy the extlink folder to the modules folder in your installation.
2) Enable the module using Administer -> Modules (/admin/build/modules).
3) No additional configuration is necessary though you may fine-tune settings at
Administer -> Site configuration -> External Links (/admin/settings/extlink).
A note about the CSS
--------------------
This module adds a CSS file that is only a few lines in length. You may choose
to move this CSS to your theme to prevent the file from needing to be loaded
separately. To do this:
1) Open the .info file for your theme, add this line of code to prevent
the extlink.css file from loading:
stylesheets[all][] = extlink.css
2) Open the extlink.css file within the extlink directory and copy all the code
from the file into your theme's style.css file.
3) Copy the extlink.png and mailto.png files to your theme's directory.
Note that you DO NOT need to make a extlink.css file. Specifying the file in the
info file is enough to tell Drupal not to load the original file.

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span.ext {
background: url(extlink.png) right center no-repeat;
padding-right: 12px;
}
span.mailto {
background: url(mailto.png) right center no-repeat;
padding-right: 12px;
}
/* Hide the extra spans when printing. */
@media print {
span.ext, span.mailto {
display: none;
padding: 0;
}
}

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name = External Links
description = Determine behavior and appearance for external links. Options include: Make external links open in a new window, add icons next to external links and email addresses, display pop-up warnings when users click external links.
package = User interface
core = 6.x
; Information added by Drupal.org packaging script on 2014-05-01
version = "6.x-1.17"
core = "6.x"
project = "extlink"
datestamp = "1398928729"

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<?php
/**
* Implements hook_install().
*/
function extlink_install() {
// Weight needs to be 1 for compatibility with SpamSpan.
db_query("UPDATE {system} SET weight = 1 WHERE name = 'extlink'");
}
/**
* Implements hook_uninstall().
*/
function extlink_uninstall() {
db_query("DELETE FROM {variable} WHERE name LIKE 'extlink_%'");
cache_clear_all('variables', 'cache');
}
/**
* Set the weight of the module to 1 for compatibility with SpamSpan.
*/
function extlink_update_6100() {
$ret = array();
$ret[] = update_sql("UPDATE {system} SET weight = 1 WHERE name = 'extlink'");
return $ret;
}

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(function ($) {
function extlinkAttach(context) {
// Strip the host name down, removing ports, subdomains, or www.
var pattern = /^(([^\/:]+?\.)*)([^\.:]{4,})((\.[a-z]{1,4})*)(:[0-9]{1,5})?$/;
var host = window.location.host.replace(pattern, '$3$4');
var subdomain = window.location.host.replace(pattern, '$1');
// Determine what subdomains are considered internal.
if (Drupal.settings.extlink.extSubdomains) {
var subdomains = "([^/]*\\.)?";
}
else if (subdomain == 'www.' || subdomain == '') {
var subdomains = "(www\\.)?";
}
else {
var subdomains = subdomain.replace(".", "\\.");
}
// Build regular expressions that define an internal link.
var internal_link = new RegExp("^https?://" + subdomains + host, "i");
// Extra internal link matching.
var extInclude = false;
if (Drupal.settings.extlink.extInclude) {
extInclude = new RegExp(Drupal.settings.extlink.extInclude.replace(/\\/, '\\'), "i");
}
// Extra external link matching.
var extExclude = false;
if (Drupal.settings.extlink.extExclude) {
extExclude = new RegExp(Drupal.settings.extlink.extExclude.replace(/\\/, '\\'), "i");
}
// Extra external link CSS selector exclusion.
var extCssExclude = false;
if (Drupal.settings.extlink.extCssExclude) {
extCssExclude = Drupal.settings.extlink.extCssExclude;
}
// Extra external link CSS selector explicit.
var extCssExplicit = false;
if (Drupal.settings.extlink.extCssExplicit) {
extCssExplicit = Drupal.settings.extlink.extCssExplicit;
}
// Find all links which are NOT internal and begin with http (as opposed
// to ftp://, javascript:, etc. other kinds of links.
// When operating on the 'this' variable, the host has been appended to
// all links by the browser, even local ones.
// In jQuery 1.1 and higher, we'd use a filter method here, but it is not
// available in jQuery 1.0 (Drupal 5 default).
var external_links = new Array();
var mailto_links = new Array();
$("a:not(." + Drupal.settings.extlink.extClass + ", ." + Drupal.settings.extlink.mailtoClass + "), area:not(." + Drupal.settings.extlink.extClass + ", ." + Drupal.settings.extlink.mailtoClass + ")", context).each(function(el) {
try {
var url = this.href.toLowerCase();
if (url.indexOf('http') == 0
&& ((!url.match(internal_link) && !(extExclude && url.match(extExclude))) || (extInclude && url.match(extInclude)))
&& !(extCssExclude && $(this).parents(extCssExclude).length > 0)
&& !(extCssExplicit && $(this).parents(extCssExplicit).length < 1)) {
external_links.push(this);
}
// Do not include area tags with begin with mailto: (this prohibits
// icons from being added to image-maps).
else if (this.tagName != 'AREA'
&& url.indexOf('mailto:') == 0
&& !(extCssExclude && $(this).parents(extCssExclude).length > 0)
&& !(extCssExplicit && $(this).parents(extCssExplicit).length < 1)) {
mailto_links.push(this);
}
}
// IE7 throws errors often when dealing with irregular links, such as:
// <a href="node/10"></a> Empty tags.
// <a href="http://user:pass@example.com">example</a> User:pass syntax.
catch(error) {
return false;
}
});
if (Drupal.settings.extlink.extClass) {
// Apply the "ext" class to all links not containing images.
if (parseFloat($().jquery) < 1.2) {
$(external_links).not('[img]').addClass(Drupal.settings.extlink.extClass).each(function() { if ($(this).css('display') == 'inline') $(this).after('<span class=' + Drupal.settings.extlink.extClass + '></span>'); });
}
else {
$(external_links).not($(external_links).find('img').parents('a')).addClass(Drupal.settings.extlink.extClass).each(function() { if ($(this).css('display') == 'inline') $(this).after('<span class=' + Drupal.settings.extlink.extClass + '></span>'); });
}
}
if (Drupal.settings.extlink.mailtoClass) {
// Apply the "mailto" class to all mailto links not containing images.
if (parseFloat($().jquery) < 1.2) {
$(mailto_links).not('[img]').addClass(Drupal.settings.extlink.mailtoClass).each(function() { if ($(this).css('display') == 'inline') $(this).after('<span class=' + Drupal.settings.extlink.mailtoClass + '></span>'); });
}
else {
$(mailto_links).not($(mailto_links).find('img').parents('a')).addClass(Drupal.settings.extlink.mailtoClass).each(function() { if ($(this).css('display') == 'inline') $(this).after('<span class=' + Drupal.settings.extlink.mailtoClass + '></span>'); });
}
}
if (Drupal.settings.extlink.extTarget) {
// Apply the target attribute to all links.
$(external_links).attr('target', Drupal.settings.extlink.extTarget);
}
Drupal.extlink = Drupal.extlink || {};
// Set up default click function for the external links popup. This should be
// overridden by modules wanting to alter the popup.
Drupal.extlink.popupClickHandler = Drupal.extlink.popupClickHandler || function() {
if (Drupal.settings.extlink.extAlert) {
return confirm(Drupal.settings.extlink.extAlertText);
}
}
$(external_links).click(function(e) {
return Drupal.extlink.popupClickHandler(e);
});
}
Drupal.behaviors.extlink = function(context) {
extlinkAttach(context);
}
})(jQuery);

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<?php
/**
* Implements hook_menu().
*/
function extlink_menu() {
$items = array();
$items['admin/settings/extlink'] = array(
'title' => 'External links',
'description' => 'Alter the display of external links on the site.',
'page callback' => 'drupal_get_form',
'page arguments' => array('extlink_admin_settings'),
'access callback' => 'user_access',
'access arguments' => array('administer site configuration'),
);
return $items;
}
/**
* Implements hook_init().
*/
function extlink_init() {
$path = drupal_get_path('module', 'extlink');
$settings = array(
'extTarget' => variable_get('extlink_target', 0),
'extClass' => variable_get('extlink_class', 'ext'),
'extSubdomains' => variable_get('extlink_subdomains', 1),
'extExclude' => variable_get('extlink_exclude', ''),
'extInclude' => variable_get('extlink_include', ''),
'extCssExclude' => variable_get('extlink_css_exclude', ''),
'extCssExplicit' => variable_get('extlink_css_explicit', ''),
'extAlert' => variable_get('extlink_alert', 0),
'extAlertText' => variable_get('extlink_alert_text', NULL),
'mailtoClass' => variable_get('extlink_mailto_class', 'mailto'),
);
// The default alert text must be translated separately to avoid caching.
if ($settings['extAlertText'] === NULL) {
$settings['extAlertText'] = t('This link will take you to an external web site. We are not responsible for their content.');
}
drupal_add_js($path . '/extlink.js');
drupal_add_js(array('extlink' => $settings), 'setting');
if (variable_get('extlink_class', 'ext') == 'ext' || variable_get('extlink_mailto_class', 'mailto') == 'mailto') {
drupal_add_css($path . '/extlink.css');
}
}
function extlink_admin_settings() {
$form = array();
$form['extlink_class'] = array(
'#type' => 'checkbox',
'#title' => t('Place an icon next to external links.'),
'#return_value' => 'ext',
'#default_value' => variable_get('extlink_class', 'ext'),
'#description' => t('Places an !icon icon next to external links.', array('!icon' => theme('image', drupal_get_path('module', 'extlink') .'/extlink.png'))),
);
$form['extlink_mailto_class'] = array(
'#type' => 'checkbox',
'#title' => t('Place an icon next to mailto links'),
'#return_value' => 'mailto',
'#default_value' => variable_get('extlink_mailto_class', 'mailto'),
'#description' => t('Places an !icon icon next to mailto links.', array('!icon' => theme('image', drupal_get_path('module', 'extlink') .'/mailto.png'))),
);
$form['extlink_subdomains'] = array(
'#type' => 'checkbox',
'#title' => t('Exclude links with the same primary domain.'),
'#default_value' => variable_get('extlink_subdomains', 1),
'#description' => t("For example, a link from 'www.example.com' to the subdomain of 'my.example.com' would be excluded."),
);
$form['extlink_target'] = array(
'#type' => 'checkbox',
'#title' => t('Open external links in a new window'),
'#return_value' => '_blank',
'#default_value' => variable_get('extlink_target', 0),
);
$form['extlink_alert'] = array(
'#type' => 'checkbox',
'#title' => t('Display a pop-up warning when any external link is clicked.'),
'#return_value' => '_blank',
'#default_value' => variable_get('extlink_alert', 0),
);
// The default alert text must be translated separately to avoid caching.
$extlink_alert_text = variable_get('extlink_alert_text', NULL);
if ($extlink_alert_text === NULL) {
$extlink_alert_text = t('This link will take you to an external web site. We are not responsible for their content.');
}
$form['extlink_alert_text'] = array(
'#type' => 'textarea',
'#title' => t('Text to display in the pop-up warning box.'),
'#rows' => 3,
'#default_value' => variable_get('extlink_alert_text', 'This link will take you to an external web site.'),
'#wysiwyg' => FALSE,
'#states' => array(
// Only show this field when user opts to display a pop-up warning.
'visible' => array(
':input[name="extlink_alert"]' => array('checked' => TRUE),
),
),
);
$patterns = array(
'<code>(example\.com)</code> ' . t('Matches example.com.'),
'<code>(example\.com)|(example\.net)</code> ' . t('Multiple patterns can be strung together by using a pipe. Matches example.com OR example.net.'),
'<code>(links/goto/[0-9]+/[0-9]+)</code> ' . t('Matches links that go through the <a href="http://drupal.org/project/links">Links module</a> redirect.'),
);
$wildcards = array(
'<code>.</code> ' . t('Matches any character.'),
'<code>?</code> ' . t('The previous character or set is optional.'),
'<code>\d</code> ' . t('Matches any digit (0-9).'),
'<code>[a-z]</code> ' . t('Brackets may be used to match a custom set of characters. This matches any alphabetic letter.'),
);
$form['patterns'] = array(
'#tree' => FALSE,
'#type' => 'fieldset',
'#title' => t('Pattern matching'),
'#collapsible' => TRUE,
'#collapsed' => TRUE,
'#description' =>
'<p>' . t('External links uses patterns (regular expressions) to match the "href" property of links.') . '</p>' .
t('Here are some common patterns.') .
theme('item_list', array('items' => $patterns)) .
t('Common special characters:') .
theme('item_list', array('items' => $wildcards)) .
'<p>' . t('All special characters (!characters) must also be escaped with backslashes. Patterns are not case-sensitive. Any <a href="http://www.javascriptkit.com/javatutors/redev2.shtml">pattern supported by JavaScript</a> may be used.', array('!characters' => '<code>^ $ . ? ( ) | * +</code>')) . '</p>',
);
$form['patterns']['extlink_exclude'] = array(
'#type' => 'textfield',
'#title' => t('Exclude links matching the pattern'),
'#maxlength' => NULL,
'#default_value' => variable_get('extlink_exclude', ''),
'#description' => t('Enter a regular expression for links that you wish to exclude from being considered external.'),
);
$form['patterns']['extlink_include'] = array(
'#type' => 'textfield',
'#title' => t('Include links matching the pattern'),
'#maxlength' => NULL,
'#default_value' => variable_get('extlink_include', ''),
'#description' => t('Enter a regular expression for internal links that you wish to be considered external.'),
);
$form['css_matching'] = array(
'#tree' => FALSE,
'#type' => 'fieldset',
'#title' => t('CSS Matching'),
'#collapsible' => TRUE,
'#collapsed' => TRUE,
'#description' =>
'<p>' . t('Use CSS selectors to exclude entirely or only look inside explicitly specified classes and IDs for external links. These will be passed straight to jQuery for matching.') . '</p>',
);
$form['css_matching']['extlink_css_exclude'] = array(
'#type' => 'textarea',
'#title' => t('Exclude links inside these CSS selectors'),
'#maxlength' => NULL,
'#default_value' => variable_get('extlink_css_exclude', ''),
'#description' => t('Enter a comma-separated list of CSS selectors (ie "#block-block-2 .content, ul.menu")'),
);
$form['css_matching']['extlink_css_explicit'] = array(
'#type' => 'textarea',
'#title' => t('Only look for links inside these CSS selectors'),
'#maxlength' => NULL,
'#default_value' => variable_get('extlink_css_explicit', ''),
'#description' => t('Enter a comma-separated list of CSS selectors (ie "#block-block-2 .content, ul.menu")'),
);
return system_settings_form($form);
}
function extlink_admin_settings_validate($form, &$form_state) {
// Check if the exclude pattern is a valid regular expression
if ($exclude = $form_state['values']['extlink_exclude']) {
// Testing the regex via replace
$regexeval = @preg_replace('/' . $exclude . '/', '', 'Lorem ipsum');
// If the regex returns NULL, then throw an error and reset the variable
if ($regexeval === NULL) {
form_set_error('extlink_exclude', t('Invalid regular expression.'));
variable_set('extlink_exclude', '');
}
}
// Check if the include pattern is a valid regular expression
if ($include = $form_state['values']['extlink_include']) {
// Testing the regex via replace
$regexeval = @preg_replace('/' . $include . '/', '', 'Lorem ipsum');
// If the regex returns NULL, then throw an error and reset the variable
if ($regexeval === NULL) {
form_set_error('extlink_include', t('Invalid regular expression.'));
variable_set('extlink_include', '');
}
}
}

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