friendica-addons/showmore/showmore.php

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<?php
/**
* Name: Show More
* Description: Collapse posts
* Version: 1.0
* Author: Michael Vogel <ike@piratenpartei.de>
* based upon NSFW from Mike Macgirvin <http://macgirvin.com/profile/mike>
*
*/
function showmore_install() {
register_hook('prepare_body', 'addon/showmore/showmore.php', 'showmore_prepare_body');
register_hook('plugin_settings', 'addon/showmore/showmore.php', 'showmore_addon_settings');
register_hook('plugin_settings_post', 'addon/showmore/showmore.php', 'showmore_addon_settings_post');
}
function showmore_uninstall() {
unregister_hook('prepare_body', 'addon/showmore/showmore.php', 'showmore_prepare_body');
unregister_hook('plugin_settings', 'addon/showmore/showmore.php', 'showmore_addon_settings');
unregister_hook('plugin_settings_post', 'addon/showmore/showmore.php', 'showmore_addon_settings_post');
}
function showmore_addon_settings(&$a,&$s) {
if(! local_user())
return;
/* Add our stylesheet to the page so we can make our settings look nice */
$a->page['htmlhead'] .= '<link rel="stylesheet" type="text/css" href="'.$a->get_baseurl().'/addon/showmore/showmore.css'.'" media="all"/>'."\r\n";
$enable_checked = (intval(get_pconfig(local_user(),'showmore','disable')) ? '' : ' checked="checked"');
$chars = get_pconfig(local_user(),'showmore','chars');
if(!$chars)
$chars = '1100';
$s .= '<div class="settings-block">';
$s .= '<h3>' . t('"Show more" Settings').'</h3>';
$s .= '<div id="showmore-wrapper">';
$s .= '<label id="showmore-enable-label" for="showmore-enable">'.t('Enable Show More').'</label>';
$s .= '<input id="showmore-enable" type="checkbox" name="showmore-enable" value="1"'.$enable_checked.' />';
$s .= '<div class="clear"></div>';
$s .= '<label id="showmore-label" for="showmore-chars">'.t('Cutting posts after how much characters').' </label>';
$s .= '<input id="showmore-words" type="text" name="showmore-chars" value="'.$chars.'" />';
$s .= '</div><div class="clear"></div>';
$s .= '<div class="settings-submit-wrapper" ><input type="submit" id="showmore-submit" name="showmore-submit" class="settings-submit" value="' . t('Submit') . '" /></div>';
// $s .= '<div class="showmore-desc">' . t('Use /expression/ to provide regular expressions') . '</div>';
$s .= '</div>';
return;
}
function showmore_addon_settings_post(&$a,&$b) {
if(! local_user())
return;
if($_POST['showmore-submit']) {
set_pconfig(local_user(),'showmore','chars',trim($_POST['showmore-chars']));
$enable = ((x($_POST,'showmore-enable')) ? intval($_POST['showmore-enable']) : 0);
$disable = 1-$enable;
set_pconfig(local_user(),'showmore','disable', $disable);
info( t('Show More Settings saved.') . EOL);
}
}
function get_body_length($body) {
$string = trim($body);
// DomDocument doesn't like empty strings
if(! strlen($string)) {
return 0;
}
// We need to get rid of hidden tags (display: none)
// Get rid of the warning. It would be better to have some valid html as input
$dom = @DomDocument::loadHTML($body);
$xpath = new DOMXPath($dom);
/*
* Checking any possible syntax of the style attribute with xpath is impossible
* So we just get any element with a style attribute, and check them with a regexp
*/
$xr = $xpath->query('//*[@style]');
foreach($xr as $node) {
if(preg_match('/.*display: *none *;.*/',$node->getAttribute('style'))) {
// Hidden, remove it from its parent
$node->parentNode->removeChild($node);
}
}
// Now we can get the body of our HTML DomDocument, it contains only what is visible
$string = $dom->saveHTML();
$string = strip_tags($string);
return strlen($string);
}
function showmore_prepare_body(&$a,&$b) {
$words = null;
if(get_pconfig(local_user(),'showmore','disable'))
return;
$chars = (int)get_pconfig(local_user(),'showmore','chars');
if(!$chars)
$chars = 1100;
if (get_body_length($b['html']) > $chars) {
$found = true;
$shortened = trim(showmore_cutitem($b['html'], $chars))."...";
}
if($found) {
$rnd = random_string(8);
$b['html'] = '<span id="showmore-teaser-'.$rnd.'" style="display: block;">'.$shortened." ".
'<span id="showmore-wrap-'.$rnd.'" style="white-space:nowrap;" class="fakelink" onclick="openClose(\'showmore-'.$rnd.'\'); openClose(\'showmore-teaser-'.$rnd.'\');" >'.sprintf(t('show more')).'</span></span>'.
'<div id="showmore-'.$rnd.'" style="display: none;">'.$b['html'].'</div>';
}
}
function showmore_cutitem($text, $limit) {
$text = trim($text);
$text = mb_convert_encoding($text, 'HTML-ENTITIES', "UTF-8");
$text = substr($text, 0, $limit);
$pos1 = strrpos($text, "<");
$pos2 = strrpos($text, ">");
$pos3 = strrpos($text, "&");
$pos4 = strrpos($text, ";");
if ($pos1 > $pos3) {
if ($pos1 > $pos2)
$text = substr($text, 0, $pos1);
} else {
if ($pos3 > $pos4)
$text = substr($text, 0, $pos3);
}
$doc = new DOMDocument();
$doc->preserveWhiteSpace = false;
$doctype = '<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">';
@$doc->loadHTML($doctype."<html><body>".$text."</body></html>");
$text = $doc->saveHTML();
$text = str_replace(array("<html><body>", "</body></html>", $doctype), array("", "", ""), $text);
return($text);
}