papercite.php

<?php

/*
  Plugin Name: papercite
  Plugin URI: http://www.bpiwowar.net/papercite
  Description: papercite enables to add BibTeX entries formatted as HTML in wordpress pages and posts. The input data is the bibtex text file and the output is HTML.
  Version: 0.5.18
  Author: Benjamin Piwowarski
  Author URI: http://www.bpiwowar.net
  Author: digfish
  Author URI: http://digfish.org
*/

// isolate papercite class in their own class file, keeping only the wordpress integtation
// in this file
require_once "papercite.class.php";



// -------------------- Interface with WordPress


// --- Head of the HTML ----
function papercite_head()
{
    if (!function_exists('wp_enqueue_script')) {
      // In case there is no wp_enqueue_script function (WP < 2.6), we load the javascript ourselves
        echo "\n" . '<script src="'.  get_bloginfo('wpurl') . '/wp-content/plugins/papercite/js/jquery.js"  type="text/javascript"></script>' . "\n";
        echo '<script src="'.  get_bloginfo('wpurl') . '/wp-content/plugins/papercite/js/papercite.js"  type="text/javascript"></script>' . "\n";
    }
}

// --- Initialise papercite ---
function papercite_init()
{
    global $papercite;

    if (function_exists('wp_enqueue_script')) {
        wp_register_script('papercite', plugins_url('papercite/js/papercite.js'), array('jquery'));
        wp_enqueue_script('papercite');
    }

  // Register and enqueue the stylesheet
    wp_register_style('papercite_css', plugins_url('papercite/papercite.css'));
    wp_enqueue_style('papercite_css');

  // Initialise the object
    $papercite = new Papercite();
}

// --- Callback function ----
/**
 * @param $myContent
 *
 * @return mixed|string|string[]|null
 */
function &papercite_cb($myContent)
{
  // Init
    $papercite = &$GLOBALS["papercite"];
  
  // Fixes issue #39 (maintenance mode support)
    if (!is_object($papercite)) {
        return $myContent;
    }
  
    $papercite->init();
  
  // Database support if needed
    if ($papercite->options["use_db"]) {
        require_once(dirname(__FILE__) . "/papercite_db.php");
    }
    
  // (0) Skip processing on this page?
    if ($papercite->options['skip_for_post_lists'] && !is_single() && !is_page()) {
//        return preg_replace("/\[\s*((?:\/)bibshow|bibshow|bibcite|bibtex|ppcnote)(?:\s+([^[]+))?]/", '', $myContent);
        return preg_replace("/\[\s*((?:\/)bibshow|bibshow|bibcite|bibtex)(?:\s+([^[]+))?]/", '', $myContent);
    }

  // (1) First phase - handles everything but bibcite keys
    $text = preg_replace_callback(
 //       "/\[\s*((?:\/)bibshow|bibshow|bibcite|bibtex|bibfilter|ppcnote)(?:\s+([^[]+))?]/",
        "/\[\s*((?:\/)bibshow|bibshow|bibcite|bibtex|bibfilter)(?:\s+([^[]+))?]/",
        array($papercite, "process"),
        $myContent
    );

    //digfish: textual footnotes
/*    $note_matches = array();
    $note_matches_count = preg_match_all('/\[ppcnote\](.+?)\[\/ppcnote\]/i',$text,$note_matches);

    if ($note_matches_count !== FALSE) {
	    $ft_matches = $note_matches[1];
	    foreach ($ft_matches as $match) {
	        $papercite->textual_footnotes[] = $match;
	    }
    }*/

    $post_id = get_the_ID();

    $text = preg_replace_callback(
            '/\[ppcnote\](.+?)\[\/ppcnote\]/i',
            function($match) use($post_id,$papercite) {
                return $papercite->processTextualFootnotes($match,$post_id);
            },
        $text
    );

    if ( count($papercite->getTextualFootnotes() ) > 0) {
	    $text .= $papercite->showTextualFootnotes(get_the_ID());
    }

    // digfish: reset the footnotes after the end of post/page
    $papercite->textual_footnotes = array();
    $papercite->textual_footnotes_counter = 0;


  // (2) Handles missing bibshow tags
    while (sizeof($papercite->bibshows) > 0) {
        $text .= $papercite->end_bibshow();
    }

  // (3) Handles custom keys in bibshow and return
    $text = str_replace($papercite->keys, $papercite->keyValues, $text);

    return $text;
}

// --- Add the documentation link in the plugin list
function papercite_row_cb($data, $file)
{
    if ($file == "papercite/papercite.php") {
        $data[] = "<a href='" . WP_PLUGIN_URL . "/papercite/documentation/index.html'>Documentation</a>";
    }
    return $data;
}
add_filter('plugin_row_meta', 'papercite_row_cb', 1, 2);

// --- Add
function papercite_mime_types($mime_types)
{
  // Adjust the $mime_types, which is an associative array where the key is extension and value is mime type.
    $mime_types['bib'] = 'application/x-bibtex'; // Adding bibtex
    return $mime_types;
}
add_filter('upload_mimes', 'papercite_mime_types', 1, 1);

// --- Add the different handlers to WordPress ---
add_action('init', 'papercite_init');
add_action('wp_head', 'papercite_head');
add_filter('the_content', 'papercite_cb', -1);


?>