398 lines
14 KiB
PHP
398 lines
14 KiB
PHP
<?php # $Id$
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if (IN_serendipity !== true) {
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die ("Don't hack!");
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}
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// Probe for a language include with constants. Still include defines later on, if some constants were missing
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$probelang = dirname(__FILE__) . '/' . $serendipity['charset'] . 'lang_' . $serendipity['lang'] . '.inc.php';
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if (file_exists($probelang)) {
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include $probelang;
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}
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include dirname(__FILE__) . '/lang_en.inc.php';
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class serendipity_event_nl2br extends serendipity_event
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{
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var $title = PLUGIN_EVENT_NL2BR_NAME;
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function introspect(&$propbag)
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{
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global $serendipity;
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$propbag->add('name', PLUGIN_EVENT_NL2BR_NAME);
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$propbag->add('description', PLUGIN_EVENT_NL2BR_DESC);
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$propbag->add('stackable', false);
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$propbag->add('author', 'Serendipity Team');
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$propbag->add('version', '2.0');
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$propbag->add('requirements', array(
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'serendipity' => '0.8',
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'smarty' => '2.6.7',
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'php' => '4.1.0'
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));
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$propbag->add('cachable_events', array('frontend_display' => true));
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$propbag->add('event_hooks', array('frontend_display' => true,
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'css' => true)
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);
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$propbag->add('groups', array('MARKUP'));
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$this->markup_elements = array(
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array(
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'name' => 'ENTRY_BODY',
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'element' => 'body',
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),
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array(
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'name' => 'EXTENDED_BODY',
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'element' => 'extended',
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),
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array(
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'name' => 'COMMENT',
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'element' => 'comment',
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),
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array(
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'name' => 'HTML_NUGGET',
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'element' => 'html_nugget',
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)
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);
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$conf_array = array('isolate', 'p_tags');
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foreach($this->markup_elements as $element) {
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$conf_array[] = $element['name'];
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}
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$propbag->add('configuration', $conf_array);
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}
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function install() {
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serendipity_plugin_api::hook_event('backend_cache_entries', $this->title);
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}
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function uninstall() {
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serendipity_plugin_api::hook_event('backend_cache_purge', $this->title);
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serendipity_plugin_api::hook_event('backend_cache_entries', $this->title);
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}
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function generate_content(&$title) {
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$title = $this->title;
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}
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function introspect_config_item($name, &$propbag)
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{
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switch($name) {
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case 'isolate':
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$propbag->add('type', 'string');
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$propbag->add('name', PLUGIN_EVENT_NL2BR_ISOLATE_TAGS);
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$propbag->add('description', PLUGIN_EVENT_NL2BR_ISOLATE_TAGS_DESC);
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$propbag->add('default', '');
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break;
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case 'p_tags':
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$propbag->add('type', 'boolean');
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$propbag->add('name', PLUGIN_EVENT_NL2BR_PTAGS);
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$propbag->add('description', PLUGIN_EVENT_NL2BR_PTAGS_DESC);
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$propbag->add('default', 'false');
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break;
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default:
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$propbag->add('type', 'boolean');
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$propbag->add('name', constant($name));
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$propbag->add('description', sprintf(APPLY_MARKUP_TO, constant($name)));
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$propbag->add('default', 'true');
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}
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return true;
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}
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function isolate($src, $regexp = NULL) {
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if($regexp) return preg_replace_callback($regexp, array($this, 'isolate'), $src);
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global $_buf;
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$_buf[] = $src[0];
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return "\001" . (count($_buf) - 1);
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}
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function restore($text) {
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global $_buf;
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return preg_replace('~\001(\d+)~e', '$_buf[$1]', $text);
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}
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function event_hook($event, &$bag, &$eventData) {
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global $serendipity;
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static $isolate = null;
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static $p_tags = null;
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global $_buf;
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$hooks = &$bag->get('event_hooks');
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if ($p_tags === null) {
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$p_tags = serendipity_db_bool($this->get_config('p_tags'));
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}
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if (isset($hooks[$event])) {
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switch($event) {
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case 'frontend_display':
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if ($isolate === null) {
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$isolate = $this->get_config('isolate');
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$tags = (array)explode(',', $isolate);
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$isolate = array();
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foreach($tags AS $tag) {
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$tag = trim($tag);
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if (!empty($tag)) {
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$isolate[] = $tag;
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}
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}
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if (count($isolate) < 1) {
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$isolate = false;
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}
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}
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foreach ($this->markup_elements as $temp) {
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if (serendipity_db_bool($this->get_config($temp['name'], true)) && isset($eventData[$temp['element']]) &&
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!$eventData['properties']['ep_disable_markup_' . $this->instance] &&
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!in_array($this->instance, (array)$serendipity['POST']['properties']['disable_markups']) &&
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!$eventData['properties']['ep_no_nl2br'] &&
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!isset($serendipity['POST']['properties']['ep_no_nl2br'])) {
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$element = $temp['element'];
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if ($p_tags) {
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$eventData[$element] = $this->nl2p($eventData[$element]);
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} else if ($isolate) {
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$eventData[$element] = $this->isolate($eventData[$element], '~[<\[](' . implode('|', $isolate) . ').*?[>\]].*?[<\[]/\1[>\]]~si');
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$eventData[$element] = nl2br($eventData[$element]);
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$eventData[$element] = $this->restore($eventData[$element]);
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} else {
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$eventData[$element] = nl2br($eventData[$element]);
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}
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}
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}
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return true;
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break;
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case 'css':
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?>
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p.whiteline {
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margin-top: 0em;
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margin-bottom: 1em;
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}
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p.break {
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margin-top: 0em;
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margin-bottom: 0em;
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}
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<?php
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return true;
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break;
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default:
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return false;
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}
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} else {
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return false;
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}
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}
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/* Insert <p class="whiteline" at paragraphs ending with two newlines
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* Insert <p class="break" at paragraphs ending with one nl
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* @param string text
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* @param boolean complex operations (not necessary when text is flat)
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* @return string
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* */
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function nl2p(&$text, $complex=true) {
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if (empty($text)) {
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return $text;
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}
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//Standardize line endings:
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//DOS to Unix and Mac to Unix
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$text = str_replace(array("\r\n", "\r"), "\n", $text);
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$text = str_split($text);
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$big_p = '<p class="whiteline">';
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$small_p = '<p class="break">';
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$insert = true;
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$i = count($text);
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$whiteline = false;
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if ($text[$i-1] == "\n") {
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//prevent unnexessary p-tag at the end
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unset($text[$i-1]);
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}
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//main operation: convert \n to big_p and small_p
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while ($i > 0) {
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if ($insert) {
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$i = $this->next_nl_block($i, $text);
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if ($i == 0) {
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//prevent replacing of first character
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break;
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}
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if ($whiteline == true) {
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$text[$i] = '</p>' . $big_p;
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} else {
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$text[$i] = '</p>' . $small_p;
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}
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$whiteline = false;
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$insert = false;
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} else {
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if ($text[$i-1] === "\n") {
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//newline is follower of a newline
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$whiteline = true;
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}
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$insert = true;
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}
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}
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if ($whiteline) {
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$start_tag = $big_p;
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} else {
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$start_tag = $small_p;
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}
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if ($complex) {
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$textstring = $this->tidy_block_elements($text);
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$textstring = $this->formate_block_elements($textstring);
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$textstring = $this->isolate_block_elements($textstring);
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$textstring = $start_tag . $textstring . '</p>';
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return $this->clean_code($textstring);
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}
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return $start_tag . implode($text) . '</p>';
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}
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/*
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* Remove unnecessary paragraphs
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* Unnecessary are those which start and end immediately.
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* They only get created by isolate_block_elements
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* @param mixed text
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* @return string
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* */
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function clean_code ($text) {
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if (is_array($text)) {
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$text = implode($text);
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}
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return str_replace(array('<p class="whiteline"></p>','<p class="break"></p>', '<p></p>'),"", $text);
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}
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function purge_p($text) {
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$text = str_replace('</p>', "", $text);
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return str_replace(array('<p class="whiteline">','<p class="break">', '<p>', '</p>'),"\n", $text);
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}
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/*
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* Use nl2p on text within blockelements, useful e.g. with blockquotes
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* @param array text
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* @return string
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* */
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function formate_block_elements($textstring) {
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$block_elements = array('<blockquote');
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foreach ($block_elements as $start_tag) {
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$end_tag = $this->end_tags($start_tag);
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//first see if block-element really exists
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$start_tag_position = strpos($textstring, $start_tag);
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while ($start_tag_position !== false) {
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$start_tag_end = strpos($textstring, '>', $start_tag_position)+1;
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$blocktext = $this->get_string_till($textstring, $end_tag, $start_tag_end);
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$blocktext_length = strlen($blocktext);
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$formatted_blocktext = $this->nl2p($blocktext);
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//insert formatted_blocktext into old blockelement
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$textstring = substr_replace($textstring, $formatted_blocktext, $start_tag_end, $blocktext_length);
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//next blockelement
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$start_tag_position = strpos($textstring, $start_tag, $start_tag_end+strlen($formatted_blocktext));
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}
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}
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return $textstring;
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}
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/**
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* Make sure none of these block_elements are within a <p>
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* @param string text
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* @return string
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* */
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function isolate_block_elements($textstring) {
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$block_elements = array('<table','<ul','<ol','<pre', '<dir', '<dl',
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'<h1', '<h2', '<h3', '<h4', '<h5', '<h6',
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'<menu', '<blockquote');
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$block_elements_amount = count($block_elements);
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for($i=0;$i<$block_elements_amount;$i++) {
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$start_tag = $block_elements[$i];
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//first see if block-element really exists
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$tag_position = strpos($textstring, $start_tag);
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if ($tag_position === false) {
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continue;
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} else {
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$end_tag = $this->end_tags($start_tag);
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$textstring = str_replace("$start_tag", "</p>$start_tag", $textstring);
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$textstring = str_replace("$end_tag", "$end_tag<p>", $textstring);
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}
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}
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return $textstring;
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}
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/**
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* Remove all <p>-tags from block-elements
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* Note: Walking from left to right
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* @param array text
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* @return string
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* */
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function tidy_block_elements($text) {
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$remove = false;
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$textstring = implode($text);
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$block_elements = array('<table','<ul','<ol','<pre', '<dir', '<dl',
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'<h1', '<h2', '<h3', '<h4', '<h5', '<h6',
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'<menu', '<blockquote');
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foreach ($block_elements as $start_tag) {
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$end_tag = $this->end_tags($start_tag);
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//first see if block-element really exists
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$start_tag_position = strpos($textstring, $start_tag);
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while ($start_tag_position !== false) {
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$start_tag_end = strpos($textstring, '>', $start_tag_position)+1;
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$blocktext = $this->get_string_till($textstring, $end_tag, $start_tag_end);
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$blocktext_length = strlen($blocktext);
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$formatted_blocktext = $this->purge_p($blocktext);
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//insert formatted_blocktext into old blockelement
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$textstring = substr_replace($textstring, $formatted_blocktext, $start_tag_end, $blocktext_length);
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//next blockelement
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$start_tag_position = strpos($textstring, $start_tag, $start_tag_end+strlen($formatted_blocktext));
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}
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}
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return $textstring;
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}
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function get_string_till($text, $end_tag, $offset=0){
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if (strpos($text, $end_tag, $offset) === false) {
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return "";
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}
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$len = strpos($text, $end_tag, $offset) - $offset;
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return substr($text, $offset, $len);
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}
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/*
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* Return corresponding end-tag: <p -> </p>
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*/
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function end_tags($start_tag) {
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return str_replace("<", "</", $start_tag).">";
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}
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/**
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* Find next newline seperated by text from current position
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* @param int start
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* $param array text
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*/
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function next_nl_block($i, $text) {
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$skipped = false;
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for ($i--; $i>0; $i-- ) {
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if (!$skipped){
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//see if you skipped over a non-newline (heading to the next block)
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if (strpos($text[$i], "\n") === false) {
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$skipped = true;
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}
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}else if (strpos($text[$i], "\n") !== false) {
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break;
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}
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}
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return $i;
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}
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}
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/* vim: set sts=4 ts=4 expandtab : */
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