104 lines
2.5 KiB
PHP
Executable File
104 lines
2.5 KiB
PHP
Executable File
<?php
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/*
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* Plugin Name: FootNotes
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* Version: 1.0
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* Plugin URI: https://www.flatpress.org
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* Author: FlatPress
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* Author URI: https://www.flatpress.org
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* Description: Enables footnotes in your entries. Part of the standard distribution.
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*/
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define('FOOTNOTES_START', '[footnotes]');
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class footnotes_class {
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var $refs = false;
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var $id = 'noid';
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function __construct($id) {
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if ($id)
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$this->id = $id;
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}
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function note($n, $s) {
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$id = $this->id;
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$this->refs = true;
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return '<li>' . trim($s) . " <a id=\"$id-fn-{$n}\" href=\"#$id-rel-{$n}\" " . "title=\"Back {$n}\">^top</a>" . '</li>';
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}
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function footnotes($matches) {
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$str = '<div class="footnotes"><h4>Footnotes</h4><ol>';
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$lines = preg_split('|\[([0-9]+)\]|', $matches [1], -1, PREG_SPLIT_DELIM_CAPTURE);
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// first array element is always empty - remove
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array_shift($lines);
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// get each footnote's number ($n) and content ($s) from the array ...
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while (($n = array_shift($lines)) && ($s = array_shift($lines))) {
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// ... and add it to the result string
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$str .= $this->note($n, $s);
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}
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$str .= '</ol></div>';
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return $str;
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}
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function references($matches) {
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$n = $matches [1];
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$id = $this->id;
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$href_rel = "{$id}-rel-{$n}";
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$href_note = "{$id}-fn-{$n}";
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return "<sup><a id=\"$href_rel\" href=\"#$href_note\" title=\"note {$n}\">{$n}</a></sup>";
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}
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function headings($matches) {
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$i = 7 - strlen($matches [1]);
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return "<h$i>{$matches[2]}</h$i>";
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}
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}
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function plugin_footnotes_filter($text) {
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global $smarty;
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$footnotes_obj = new footnotes_class($id = $smarty->get_template_vars('id'));
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// *STRONG* emphasis
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$text = preg_replace('|(?<!\S)\*(?=\S) (?! \*) (.+?) (?<=\S) \*(?!>\w)|xs', '<strong>$1</strong>', $text);
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// _emphasis_ (italic)
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$text = preg_replace('|(?<!\S)\_(?=\S) (?! \_) (.+?) (?<=\S) \_(?!>\w)|xs', '<em>$1</em>', $text);
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// heading
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/*
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* $text = preg_replace_callback(
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* '(?<!\w)=(?=\S) (?! =) (.+?) (?<=\S) =(?!>\w)|xs'
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* //'/\n(#{1,6})([^#]+)# * /',
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* array(&$footnotes_obj, 'headings'),
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* $text);
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*
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*/
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$text = preg_replace_callback('|\n' . preg_quote(FOOTNOTES_START) . '\s*(.*)|sm', array(
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&$footnotes_obj,
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'footnotes'
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), $text);
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// no [footnotes] references at the bottom of the page: stops
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if (!$footnotes_obj->refs)
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return $text;
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$text = preg_replace_callback('|\[([0-9]+)\]|', array(
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&$footnotes_obj,
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'references'
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), $text);
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return $text;
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}
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add_filter('the_content', 'plugin_footnotes_filter', 0);
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?>
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