823 lines
29 KiB
PHP
823 lines
29 KiB
PHP
<?php
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if (IN_serendipity !== true) {
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die ("Don't hack!");
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}
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@serendipity_plugin_api::load_language(dirname(__FILE__));
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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', '2.21');
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$propbag->add('requirements', array(
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'serendipity' => '1.6',
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'smarty' => '2.6.7',
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'php' => '4.1.0'
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));
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$propbag->add('cachable_events', array('frontend_display' => true));
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$propbag->add('event_hooks', array('frontend_display' => true,
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'backend_configure' => true,
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'css' => true
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));
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$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('check_markup', 'isolate', 'p_tags', 'isobr', 'clean_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 cleanup()
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{
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global $serendipity;
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/* check possible config mismatch setting in combination with ISOBR */
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if ( serendipity_db_bool($this->get_config('isobr')) === true ) {
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if( serendipity_db_bool($this->get_config('clean_tags')) === true ) {
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$this->set_config('clean_tags', false);
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echo '<div class="serendipityAdminMsgError msg_error"><img class="backend_attention" src="' . $serendipity['serendipityHTTPPath'] . 'templates/default/admin/img/admin_msg_note.png" alt="" />';
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echo sprintf(PLUGIN_EVENT_NL2BR_CONFIG_ERROR, 'clean_tags', 'ISOBR') . '</div>';
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return false;
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}
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if ( serendipity_db_bool($this->get_config('p_tags')) === true ) {
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$this->set_config('p_tags', false);
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echo '<div class="serendipityAdminMsgError msg_error"><img class="backend_attention" src="' . $serendipity['serendipityHTTPPath'] . 'templates/default/admin/img/admin_msg_note.png" alt="" />';
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echo sprintf(PLUGIN_EVENT_NL2BR_CONFIG_ERROR, 'p_tags', 'ISOBR') . '</div>';
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return false;
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}
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}
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/* check possible config mismatch setting in combination with P_TAGS */
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if ( serendipity_db_bool($this->get_config('p_tags')) === true && serendipity_db_bool($this->get_config('clean_tags')) === true ) {
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$this->set_config('clean_tags', false);
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echo '<div class="serendipityAdminMsgError msg_error"><img class="backend_attention" src="' . $serendipity['serendipityHTTPPath'] . 'templates/default/admin/img/admin_msg_note.png" alt="" />';
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echo sprintf(PLUGIN_EVENT_NL2BR_CONFIG_ERROR, 'clean_tags', 'P_TAGS') . '</div>';
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return false;
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}
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return true;
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}
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function example()
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{
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return '<h3>PLEASE NOTE the implications of this markup plugin:</h3>
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<p>This plugin transfers linebreaks to HTML-linebreaks, so that they show up in your blog entry.</p>
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<p>In two cases this can raise problematic issues for you:</p>
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<ul>
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<li>if you use a <strong>WYSIWYG editor</strong> to write your entries. In that case, the WYSIWYG editor already inserts proper HTML linebreaks, so the nl2br plugin would actually double those linebreaks.</li>
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<li>if you use any other markup plugins in conjunction with this plugin that already translate linebreaks. The <strong>TEXTILE and MARKDOWN plugins</strong> are examples for plugins like these.</li>
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</ul>
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<p>To prevent problems, you should disable the nl2br plugin on entries globally or per entry within the "Extended properties" section of an entry, if you have the entryproperties plugin installed.</p>
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<p>Generally advice: The nl2br plugin only makes sense if you</p>
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<ul>
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<li>A) do not use other markup plugins or</li>
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<li>B) you do not use the WYSIWYG editor or</li>
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<li>C) you only want to apply linebreak transformations on comments to your blog entries, and do not allow any possible markup of other plugins that you only use for blog entries.</li>
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</ul>'."\n";
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}
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function install()
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{
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serendipity_plugin_api::hook_event('backend_cache_entries', $this->title);
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}
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function uninstall(&$propbag)
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{
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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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{
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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 'check_markup':
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$propbag->add('type', 'boolean');
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$propbag->add('name', PLUGIN_EVENT_NL2BR_CHECK_MARKUP);
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$propbag->add('description', PLUGIN_EVENT_NL2BR_CHECK_MARKUP_DESC);
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$propbag->add('default', 'true');
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break;
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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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case 'isobr':
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$propbag->add('type', 'boolean');
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$propbag->add('name', PLUGIN_EVENT_NL2BR_ISOBR_TAG);
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$propbag->add('description', PLUGIN_EVENT_NL2BR_ISOBR_TAG_DESC);
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$propbag->add('default', 'true');
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break;
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case 'clean_tags':
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$propbag->add('type', 'boolean');
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$propbag->add('name', PLUGIN_EVENT_NL2BR_CLEANTAGS);
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$propbag->add('description', PLUGIN_EVENT_NL2BR_CLEANTAGS_DESC);
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$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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break;
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}
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return true;
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}
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function isolate($src, $regexp = NULL)
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{
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if($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_callback($matches)
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{
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global $_buf;
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return $_buf[$matches[1]];
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}
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function restore($text)
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{
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return preg_replace_callback('!\001(\d+)!', array($this, 'restore_callback'), $text); // works?!
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}
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function event_hook($event, &$bag, &$eventData, $addData = null)
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{
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global $serendipity;
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static $markup = null;
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static $isolate = null;
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static $p_tags = null;
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static $isobr = null;
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static $clean_tags = null;
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global $_buf;
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$hooks = &$bag->get('event_hooks');
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if ($markup === null) {
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$markup = serendipity_db_bool($this->get_config('check_markup'));
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}
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if ($p_tags === null) {
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$p_tags = serendipity_db_bool($this->get_config('p_tags'));
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}
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if ($isobr === null) {
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$isobr = serendipity_db_bool($this->get_config('isobr'));
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}
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if ($clean_tags === null) {
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$clean_tags = serendipity_db_bool($this->get_config('clean_tags'));
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}
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if (isset($hooks[$event])) {
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switch($event) {
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case 'frontend_display':
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// check single entry for temporary disabled markups
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if ( !$eventData['properties']['ep_disable_markup_' . $this->instance] &&
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@!in_array($this->instance, $serendipity['POST']['properties']['disable_markups']) &&
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!$eventData['properties']['ep_no_textile'] && !isset($serendipity['POST']['properties']['ep_no_textile']) &&
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!$eventData['properties']['ep_no_markdown'] && !isset($serendipity['POST']['properties']['ep_no_markdown'])) {
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// yes, this markup shall be applied
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$serendipity['nl2br']['entry_disabled_markup'] = false;
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} else {
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// no, do not apply markup
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$serendipity['nl2br']['entry_disabled_markup'] = true;
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}
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/* PLEASE NOTE:
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$serendipity['POST']['properties']['disable_markups'] = array(false); is the only workable solution for (sidebar?) plugins (see sidebar plugins: guestbook, multilingual), to explicitly allow to apply nl2br to markup (if we want to)
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*/
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// don't run, if the textile, or markdown plugin already took care about markup
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if ($markup && $serendipity['nl2br']['entry_disabled_markup'] === false && (class_exists('serendipity_event_textile') || class_exists('serendipity_event_markdown'))) {
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break;
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}
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// NOTE: the wysiwyg-editor needs to send its own ['properties']['ep_no_nl2br'] to disable the nl2br() parser!
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// check for users isolation tags
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if ($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, $serendipity['POST']['properties']['disable_markups']) &&
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!$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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// NL2P OPERATION
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$this->isolationtags = $isolate;
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$text = $eventData[$element];
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if (!empty($text)) {
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//Standardize line endings to Unix
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$text = str_replace(array("\r\n", "\r"), "\n", $text);
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//move newlines from body to extended
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if ($element == 'body' && isset($eventData['extended']))
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{
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$eventData['extended'] = str_repeat("\n",strspn($text,"\n",-1)) . $eventData['extended'];
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$text = rtrim($text,"\n");
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}
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$eventData[$element] = $this->nl2p($text);
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}
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// NL2BR OPERATION
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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[$element]);
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} else {
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if($isobr) {
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$eventData[$element] = $this->isolate($eventData[$element], '~[<\[](nl).*?[>\]].*?[<\[]/\1[>\]]~si');
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$eventData[$element] = nl2br($eventData[$element]);
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$eventData[$element] = $this->restore($eventData[$element]);
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// unset nl tagline, if is
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$eventData[$element] = str_replace(array("<nl>", "</nl><br />", "</nl><br/>", "</nl>"), "", $eventData[$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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/* this is an option if not using new isobr default config setting */
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if (!$p_tags && $isobr === false && $clean_tags === true) {
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// convert line endings to Unix style, if not already done
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$eventData[$element] = str_replace(array("\r\n", "\r"), "\n", $eventData[$element]);
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// clean special tags from nl2br
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$eventData[$element] = $this->clean_nl2brtags($eventData[$element]);
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}
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}
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}
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break;
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case 'backend_configure':
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// check single entry for temporary disabled markups
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if( $isobr ) {
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$serendipity['nl2br']['iso2br'] = true; // include to global as also used by staticpages now
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if (!is_object($serendipity['smarty'])) {
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serendipity_smarty_init(); // if not set to avoid member function assign() on a non-object error, start Smarty templating
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}
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// hook into default/admin/entries.tpl somehow via the Heart Of Gold = serendipity_printEntryForm() before! it is loaded
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$serendipity['smarty']->assign('iso2br', true);
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}
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break;
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case 'css':
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$eventData .= '
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/* nl2br plugin start */
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p.wl_bottom {
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margin-top: 0em;
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margin-bottom: 1em;
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}
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p.wl_top {
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margin-top: 1em;
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margin-bottom: 0em;
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}
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p.wl_top_bottom {
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margin-top: 1em;
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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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/* nl2br plugin end */
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';
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break;
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default:
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return false;
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}
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return true;
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} else {
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return false;
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}
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}
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/**
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* clean nl2br from markup where it is invalid and/or breaks html output
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* @param string entrytext
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* @return string
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*/
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function clean_nl2brtags(&$entry)
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{
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$allTags = explode('|', 'table|thead|tbody|tfoot|th|tr|td|caption|colgroup|col|ol|ul|li|dl|dt|dd');
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$br2nl = array();
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foreach($allTags as $tag){
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/* for \\1 ( start with : < followed by any number of white spaces : \s* optionally a slash : /? and the tag itself )
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* for \\2 ( anything with spaces and characters following until )
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* for \\3 ( finally the > )
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* for \\4 ( <br followed by any number of spaces, the optional slash and ending with > )
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* regex modifier : i - using a case-insensitive match, as upper <TAGS> are valid in HTML
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* regex modifier : s - using the dot metacharacter in the pattern to match all characters, including newlines */
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$br2nl[] = "%(<\s*/?$tag)(.*?)([^>]*>)(<br\s*/?>)%is";
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}
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if(sizeof($br2nl)) $entry = preg_replace($br2nl, '\\1\\2\\3', $entry);
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return $entry;
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}
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/** ====================================
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* NL2P OPERATION
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* ====================================
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*/
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// following w3.org, these elements close p elements automatically:
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var $block_elements = array('table','ul','ol','pre', 'dl',
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'h1', 'h2', 'h3', 'h4', 'h5', 'h6',
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'menu', 'section',
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'address', 'article', 'aside', 'fieldset', 'footer',
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'form', 'header', 'hgroup', 'hr', 'main', 'nav', 'p'
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);
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var $nested_block_elements = array('div','table','blockquote');
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var $singleton_elements = array('area', 'br', 'col', 'command', 'embed', 'hr',
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'img', 'input', 'keygen', 'link', 'param', 'source',
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'track', 'wbr', '!--'
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);
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var $allowed_p_parents = array('blockquote', 'td', 'div', 'article', 'aside', 'dd',
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'details', 'dl', 'dt', 'footer', 'header', 'summary'
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);
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//paragraphs aren't allowed in these inline elements -> p closes these elements:
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var $inline_elements = array('b', 'big', 'i', 'small', 'tt', 'abbr',
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'acronym', 'cite', 'code', 'dfn', 'em', 'kbd', 'strong',
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'samp', 'var', 'a', 'bdo', 'br', 'map', 'object',
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'q', 'script', 'span', 'sub', 'sup', 'button',
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'label', 'select', 'textarea'
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);
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const P_TOP = '<p class="wl_top">';
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const P_BOTTOM = '<p class="wl_bottom">';
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const P_TOP_BOTTOM = '<p class="wl_top_bottom">';
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const P_BREAK = '<p class="break">';
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const P_END = '</p>';
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function nl2p($text)
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{
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//homogenize tags
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$text = $this->tag_clean($text);
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//delete isolation tags from other arrays
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if ($this->isolationtags)
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{
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$this->block_elements = array_diff($this->block_elements,$this->isolationtags);
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$this->allowed_p_parents = array_diff($this->allowed_p_parents,$this->isolationtags);
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$this->nested_block_elements = array_diff($this->nested_block_elements,$this->isolationtags);
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$this->inline_elements = array_diff($this->inline_elements,$this->isolationtags);
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$this->singleton_elements = array_diff($this->singleton_elements,$this->isolationtags);
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}
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else { $this->isolationtags = array(); }
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return $this->blocktag_nl2p($text);
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}
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/** Make sure that all the tags are in lowercase
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* purge all \n from inside tags
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* remove spaces in endtags
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* @param string text
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* @return text
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*/
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function tag_clean($textstring)
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{
|
|
$text = str_split($textstring);
|
|
$tagstart = false;
|
|
$tagstart_b = false;
|
|
$tagdef = false;
|
|
$endtag = false;
|
|
$tagstyle = false;
|
|
|
|
for ($i = 0; $i < count($text); $i++)
|
|
{
|
|
if ($text[$i] == '<' && !strpos($textstring,'>',$i+1) )
|
|
{ $text[$i] = '<'; }
|
|
elseif ($text[$i] == '>' && !($tagstart !== false || $tagdef || $tagstyle) )
|
|
{ $text[$i] = '>'; }
|
|
elseif ($text[$i] == '<')
|
|
{ $tagstart = $i; }
|
|
elseif ($text[$i] == ' ' && $tagstart !== false )
|
|
{ $text[$i] = ''; }
|
|
elseif ($text[$i] == '>' && $tagstart !== false )
|
|
{
|
|
$text[$tagstart] = '<';
|
|
$text[$i] = '>';
|
|
}
|
|
elseif ($text[$i] == ' ' && $tagdef)
|
|
{
|
|
//check if it is a real tag
|
|
$tag = substr($textstring,$tagdef,$i-$tagdef);
|
|
|
|
if ( !(in_array($tag,$this->block_elements)
|
|
|| in_array($tag,$this->singleton_elements)
|
|
|| in_array($tag,$this->inline_elements)
|
|
|| in_array($tag,$this->allowed_p_parents)
|
|
|| in_array($tag,$this->isolationtags)
|
|
|| in_array($tag,$this->nested_block_elements) ))
|
|
{
|
|
$text[$tagstart_b] = '<';
|
|
$text[strpos($textstring,'>',$i+1)] = '>';
|
|
} else
|
|
{
|
|
$tagstyle = true;
|
|
$tagdef = false;
|
|
}
|
|
}
|
|
elseif ($text[$i] == '/' && $tagstart !== false)
|
|
{ $endtag = true; }
|
|
elseif ($text[$i] == ' ' && $endtag)
|
|
{ $text[$i] = ''; }
|
|
elseif (($tagstart !== false || $tagdef || $tagstyle) && $text[$i] == "\n")
|
|
{ $text[$i] = ''; }
|
|
elseif ($text[$i] == '>' && ($tagdef || $tagstyle) )
|
|
{
|
|
$tagstart = false;
|
|
$tagdef = false;
|
|
$tagstyle = false;
|
|
$endtag = false;
|
|
}
|
|
elseif ($tagstart !== false)
|
|
{
|
|
$tagdef = $i;
|
|
$tagstart_b = $tagstart;
|
|
$tagstart = false;
|
|
$text[$i] = strtolower($text[$i]);
|
|
}
|
|
elseif ($tagdef)
|
|
{ $text[$i] = strtolower($text[$i]); }
|
|
}
|
|
return implode($text);
|
|
}
|
|
|
|
/*
|
|
* sophisticated nl to p - blocktag stage
|
|
* handles content with blocktags, apply nl2p to the block elements if tag allows it
|
|
* works also for ommitted closing tags and singleton tags
|
|
* Insert P_BOTTOM class at paragraphs ending with two newlines
|
|
* Insert P_BREAK class at paragraphs ending with one newline
|
|
* Insert P_TOP class at the first paragraph if starting with a nl
|
|
* Insert P_TOP_BOTTOM class if the first paragraph is ending with two newlines
|
|
* @param: text
|
|
* return string
|
|
*/
|
|
function blocktag_nl2p($text)
|
|
{
|
|
//explode string into array of tags and contents
|
|
$textarray = $this->explode_along_tags($text);
|
|
$content = "";
|
|
$start = 0;
|
|
$tagstack = array();
|
|
$isolation_flag = false;
|
|
|
|
for ($i=0; $i < count($textarray); $i++)
|
|
{
|
|
|
|
//get tag or false if none
|
|
$tag = $this->extract_tag($textarray[$i]);
|
|
|
|
//new blocktag - e.g. <table>
|
|
if ($tag && $this->is_starttag($textarray[$i])
|
|
&& (in_array($tag, $this->block_elements) || in_array($tag, $this->nested_block_elements) ))
|
|
{
|
|
//merge previous content, apply nl2p if needed and concatenate
|
|
if (!$isolation_flag && ( empty($tagstack) || in_array($tagstack[0], $this->allowed_p_parents) ))
|
|
{
|
|
$content .= $this->nl2pblock(implode(array_slice($textarray,$start,$i-$start)));
|
|
} else
|
|
{
|
|
$content .= implode(array_slice($textarray,$start,$i-$start));
|
|
}
|
|
// clear stack of block elements and insert
|
|
if (in_array($tag, $this->block_elements) )
|
|
{
|
|
$tagstack = array_diff($tagstack, $this->block_elements);
|
|
}
|
|
// concatenate tag
|
|
$content .= $textarray[$i] . "\n";
|
|
|
|
if (!in_array($tag, $this->singleton_elements) )
|
|
{
|
|
array_unshift($tagstack, $tag);
|
|
}
|
|
$start = $i+1;
|
|
}
|
|
//new tag which can contain paragraphs and can be inside a blocktag - e.g. <td>
|
|
elseif ($tag && $this->is_starttag($textarray[$i]) && in_array($tag, $this->allowed_p_parents))
|
|
{
|
|
//merge previous content, apply nl2p if needed and concatenate
|
|
if (!$isolation_flag && ( empty($tagstack) || in_array($tagstack[0], $this->allowed_p_parents) ))
|
|
{
|
|
$content .= $this->nl2pblock(implode(array_slice($textarray,$start,$i-$start)));
|
|
} else
|
|
{
|
|
$content .= implode(array_slice($textarray,$start,$i-$start));
|
|
}
|
|
//insert tag into the stack and concatenate
|
|
array_unshift($tagstack, $tag);
|
|
$content .= $textarray[$i];
|
|
$start = $i+1;
|
|
}
|
|
//isolation tag
|
|
elseif($tag && $this->is_starttag($textarray[$i]) && in_array($tag, $this->isolationtags) )
|
|
{
|
|
//merge previous content, apply nl2p if needed and concatenate
|
|
if (!$isolation_flag && empty($tagstack) )
|
|
{
|
|
$content .= $this->nl2pblock(implode(array_slice($textarray,$start,$i-$start)));
|
|
} elseif (!$isolation_flag && in_array($tagstack[0], $this->allowed_p_parents) )
|
|
{
|
|
$content .= $textarray[$start]
|
|
. $this->nl2pblock(implode(array_slice($textarray,$start+1,$i-$start-1)));
|
|
} else
|
|
{
|
|
$content .= implode(array_slice($textarray,$start,$i-$start));
|
|
}
|
|
$isolation_flag = true;
|
|
$start = $i+1;
|
|
}
|
|
//closing isolation tag
|
|
elseif($tag && !$this->is_starttag($textarray[$i]) && in_array($tag, $this->isolationtags) )
|
|
{
|
|
if ($isolation_flag)
|
|
{
|
|
//content, no nl2p
|
|
$content .= implode(array_slice($textarray,$start,$i-$start-1));
|
|
$isolation_flag = false;
|
|
$start = $i+1;
|
|
}
|
|
}
|
|
//closing blocktag or p parent - e.g. </table> or </td>
|
|
elseif($tag && !$this->is_starttag($textarray[$i]) && !empty($tagstack) && $tag == $tagstack[0])
|
|
{
|
|
//content, apply nl2p if needed
|
|
if ($i != $start)
|
|
{
|
|
if (!$isolation_flag && in_array($tagstack[0], $this->allowed_p_parents) )
|
|
{
|
|
$content .= $this->nl2pblock(implode(array_slice($textarray,$start,$i-$start)));
|
|
} else
|
|
{
|
|
$content .= implode(array_slice($textarray,$start,$i-$start));
|
|
}
|
|
}
|
|
//closing tag
|
|
$content .= $textarray[$i] . "\n";
|
|
|
|
$start = $i+1;
|
|
array_shift($tagstack);
|
|
}
|
|
}
|
|
|
|
//merge remainder
|
|
if (!$isolation_flag && ( empty($tagstack) || in_array($tagstack[0], $this->allowed_p_parents) ))
|
|
{
|
|
$content .= $this->nl2pblock(implode(array_slice($textarray,$start,$i-$start)));
|
|
} else
|
|
{
|
|
$content .= implode(array_slice($textarray,$start,$i-$start));
|
|
}
|
|
return $content;
|
|
}
|
|
|
|
/*
|
|
* sophisticated nl to p for content which is already
|
|
* purged from block elements by blocktag_nl2p
|
|
* explode content along \n
|
|
* check for following \n
|
|
* explode along (inline) tags, get active tags across newlines
|
|
* build every paragraph: p class | reopen active tags | content ... | new open tags | closing p tag
|
|
* @param string text
|
|
* @return string
|
|
*/
|
|
function nl2pblock($textstring)
|
|
{
|
|
|
|
//check for empty content
|
|
if (empty(trim($textstring))) { return $textstring; }
|
|
|
|
//check for start/end newlines
|
|
$startnl = ( strspn($textstring,"\n") ) ? true : false;
|
|
$endnl = ( strspn($textstring,"\n",-1 ) ) ? true : false;
|
|
$whiteline = false;
|
|
$textstring = trim($textstring,"\n");
|
|
if (empty($textstring)) { return ''; }
|
|
|
|
//explode in paragraphs
|
|
$textarray = explode("\n",$textstring);
|
|
$tagstack = array();
|
|
$tagstack_prev = array();
|
|
$textline = array();
|
|
|
|
$content = '';
|
|
|
|
for($i=0; $i<count($textarray);$i++)
|
|
{
|
|
//check for whiteline
|
|
if ($i < count($textarray) - 1 && empty($textarray[$i+1]) )
|
|
{
|
|
$whiteline = true;
|
|
}
|
|
elseif (empty($textarray[$i]))
|
|
{
|
|
continue;
|
|
}
|
|
|
|
//explode in tags and content
|
|
$textline = $this->explode_along_tags($textarray[$i]);
|
|
//save active tags
|
|
$tagstack_prev = $tagstack;
|
|
|
|
//iterate trough the tags in the paragraph
|
|
for ($j=0; $j<count($textline); $j++)
|
|
{
|
|
//get tag or false if none
|
|
$tag = $this->extract_tag($textline[$j]);
|
|
|
|
// put or remove tag from stack
|
|
if ($tag && $this->is_starttag($textline[$j]) && !in_array($tag,$this->singleton_elements) )
|
|
{
|
|
array_unshift($tagstack, $textline[$j]);
|
|
}
|
|
elseif($tag && !$this->is_starttag($textline[$j]) && !empty($tagstack) && $tag == $this->extract_tag($tagstack[0]))
|
|
{
|
|
array_shift($tagstack);
|
|
}
|
|
}
|
|
|
|
//build content
|
|
//paragraph class
|
|
if ($i == 0 && $startnl && ( $whiteline || ($i == count($textarray)-1 && $endnl) ) )
|
|
{
|
|
$content .= self::P_TOP_BOTTOM;
|
|
}
|
|
elseif ($i == 0 && $startnl)
|
|
{
|
|
$content .= self::P_TOP;
|
|
}
|
|
elseif ($whiteline || ($i == count($textarray)-1 && $endnl))
|
|
{
|
|
$content .= self::P_BOTTOM;
|
|
} else
|
|
{
|
|
$content .= self::P_BREAK;
|
|
}
|
|
|
|
//reopen active tags
|
|
foreach($tagstack_prev as $ins_tag)
|
|
{
|
|
$content .= $ins_tag;
|
|
}
|
|
|
|
//content paragraph
|
|
$content .= $textarray[$i];
|
|
|
|
//close open tags
|
|
foreach($tagstack as $ins_tag)
|
|
{
|
|
$content .= $this->html_end_tag($this->extract_tag($ins_tag));
|
|
}
|
|
//paragraph closing tag
|
|
$content .= self::P_END . "\n";
|
|
$whiteline = false;
|
|
}
|
|
|
|
return $content;
|
|
}
|
|
|
|
/** explode textstring into array of substrings
|
|
* array element can be tag or content
|
|
* @param text
|
|
* $return array of tags and contents
|
|
*/
|
|
function explode_along_tags($text)
|
|
{
|
|
$startpos = 0;
|
|
$endpos = 0;
|
|
$textarray = array();
|
|
do
|
|
{
|
|
//find tag start
|
|
$endpos = strpos($text,'<',$startpos);
|
|
if ($endpos === false)
|
|
{
|
|
//no more tags, copy remainder to array
|
|
$endpos = strlen($text);
|
|
if ($endpos - $startpos > 0)
|
|
{ $textarray[] = substr($text,$startpos,$endpos - $startpos); }
|
|
return $textarray;
|
|
}
|
|
elseif (($endpos - $startpos) > 0)
|
|
{
|
|
//copy preliminary text to array
|
|
$textarray[] = substr($text,$startpos,$endpos - $startpos);
|
|
}
|
|
$startpos = $endpos;
|
|
//find tag end
|
|
$endpos = strpos($text,'>',$startpos);
|
|
if ($endpos === false) { return false; }
|
|
elseif (($endpos - $startpos) > 1)
|
|
{
|
|
//copy tag to array
|
|
$textarray[] = substr($text,$startpos,$endpos - $startpos + 1);
|
|
$startpos = $endpos + 1;
|
|
}
|
|
else { return false; }
|
|
} while (1);
|
|
return false;
|
|
}
|
|
|
|
function extract_tag($text)
|
|
{
|
|
if ($text[0] != '<') { return false; }
|
|
$n = strcspn($text,' >');
|
|
return ltrim(substr($text,0,$n),'</');
|
|
}
|
|
|
|
function html_end_tag($text) { return '</' . $text . '>'; }
|
|
function html_start_tag($text) { return '<' . $text . '>'; }
|
|
function is_starttag($text) { return ($text[1] == "/") ? false : true; }
|
|
|
|
|
|
}
|
|
|
|
/* vim: set sts=4 ts=4 expandtab : */
|
|
?>
|