Extension:SimpleTable/1.2

<?php
 
/*
 * Tabbed Data extension.
 *
 * This extension implements a simple method to display tabular data, with a
 * far simpler markup than the standard Wiki table markup.  The goal is to
 * allow tabular data to be very easily pasted in from an external source,
 * such as a spreadsheet.  The disadvantage is that it doesn't allow for any
 * fancy formatting; for example, there is no way (as yet) to set row and cell
 * parameters, including row and cell spanning.  However, it makes a very
 * simple way to include tabular data in a Wiki.
 *
 * All you need to do is prepare your data in rows, with fields separated
 * by tab characters.  Excel's "Save as" -> "Text (Tab delimited)" function
 * saves data in this format.  Place the data inside <tab>...</tab> tags,
 * and set any table parameters inside the opening <tab> tag; eg.:
 *
 *   <tab class=wikitable>
 *   field1\tfield2\t...
 *   field1\tfield2\t...
 *   </tab>
 *
 * Additional parameters allowed in the tag are:
 *   sep        Specify a different separator; see the $separators array.
 *   head       Specify a heading; "head=top" makes the first row a heading,
 *              "head=left" makes the first column a heading, "head=topleft"
 *              does both.
 *
 * Thanks for contributions to:
 *      Smcnaught
 *      Frederik Dohr
 */
 
$wgExtensionFunctions[] = 'wfSimpleTable';
$wgExtensionCredits['parserhook'][] = array(
  'name'=>'SimpleTable',
  'author'=>'Johan the Ghost',
  'url'=>'http://www.mediawiki.org/wiki/Extension:SimpleTable',
  'description'=>'Convert tab-separated or similar data into a Wiki table',
);
 
 
/*
 * Setup SimpleTable extension.
 * Sets a parser hook for <tab></tab>.
 */
function wfSimpleTable() {
    new SimpleTable();
}
 
 
class SimpleTable {
 
    /*
     * The permitted separators.  An array of separator style name
     * and preg pattern to match it.
     */
    private $separators = array(
        'space' => '/ /',
        'spaces' => '/\s+/',
        'tab' => '/\t/',
        'comma' => '/,/',
        'colon' => '/:/',
        'semicolon' => '/;/',
        'bar' => '/\|/',
    );
 
 
    /*
     * Construct the extension and install it as a parser hook.
     */
    public function __construct() {
        global $wgParser;
        $wgParser->setHook('tab', array(&$this, 'hookTab'));
    }
 
 
    /*
     * The hook function. Handles <tab></tab>.
     * Receives the table content and <tab> parameters.
     */
    public function hookTab($tableText, $argv, $parser) {
        // The default field separator.
        $sep = 'tab';
 
        // Default value for using table headings.
        $head = null;
 
        // Build the table parameters string from the tag parameters.
        // The 'sep' and 'head' parameters are special, and are handled
        // here, not passed to the table.
        $params = '';
        foreach ($argv as $key => $val) {
            if ($key == 'sep')
                $sep = $val;
            else if ($key == 'head')
                $head = $val;
            else
                $params .= ' ' . $key . '="' . $val . '"';
        }
 
        if (!array_key_exists($sep, $this->separators))
            return "Invalid separator: $sep";
 
        // Parse and convert the table body.
        $wikiText = $this->convertTable($tableText, $head, $this->separators[$sep]);
 
        // Wrap the body in table tags, with the table parameters.
        $wikiTable = "{|" . $params . "\n" . $wikiText . "|}";
 
        // Done.  Parse the result, so that the table can contain Wiki
        // text.  Thanks to Smcnaught.
        $ret = $parser->parse($wikiTable,
                              $parser->mTitle,
                              $parser->mOptions,
                              false,
                              false);
        $HTML = trim( str_replace("</table>\n\n", "</table>", $ret->getText()) ); # remove superfluous newlines
        return $HTML;
    }
 
 
    /*
     * Convert tabbed data into a Wiki-markup table body.
     */
    private function convertTable($tabbed, $head, $pattern) {
        $wikitab = '';
 
        // Remove initial and final newlines.
        $tabbed = trim($tabbed);
 
        // Split the input into lines, and convert each line to table format.
        $lines = preg_split('/\n/', $tabbed);
        $row = 0;
        foreach ($lines as $line) {
            $wikitab .= "|-\n";
            $bar = strpos($head, 'top') !== false && $row == 0 ? '!' : '|';
 
            $fields = preg_split($pattern, $line);
            $col = 0;
            foreach ($fields as $field) {
                $cbar = strpos($head, 'left') !== false && $col == 0 ? '!' : $bar;
                $wikitab .= $cbar . " " . $field . "\n";
                ++$col;
            }
            ++$row;
        }
        return $wikitab;
    }
 
}