Extension:ImageSizeInfoFunctions/ImageSizeInfoFunctions.php

<?php
// ImageSizeInfoFunctions MediaWiki Extension.
// Give two parser functions returning width and height of a given image.
//
// Copyright (C) 2007, Dario de Judicibus.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
if ( !defined( 'MEDIAWIKI' ) ) {
        die( 'This file is a MediaWiki extension, it is not a valid entry point' );
}
 
$wgExtensionFunctions[] = 'wfSetupImageSizeInfoFunctions';
$wgExtensionCredits['parserhook'][] = array(
        'name' => 'ImageSizeInfoFunctions',
        'version' => '1.0.1',
        'url' => 'http://www.mediawiki.org/wiki/Extension:ImageSizeInfoFunctions',
        'author' => 'Dario de Judicibus',
        'description' => 'Enhance parser with image size info functions',
);
 
$wgHooks['LanguageGetMagic'][]       = 'wfImageSizeInfoFunctionsLanguageGetMagic';
 
class ExtImageSizeInfoFunctions {
 
        function clearState() {
                return true;
        }
 
        function imageWidth( &$parser, $image = '' ) {
                try {
                        $title = Title::newFromText($image,NS_IMAGE);
                        $file = function_exists( 'wfFindFile' ) ? wfFindFile( $title ) : new Image( $title );
                        $width = (is_object( $file ) && $file->exists()) ? $file->getWidth() : 0;
                        return $width;
                } catch(Exception $e) {
                        return $e->getMessage();
                } 
        }
 
        function imageHeight( &$parser, $image = '' ) {
                try {     
                        $title = Title::newFromText($image,NS_IMAGE);  
                        $file = function_exists( 'wfFindFile' ) ? wfFindFile( $title ) : new Image( $title );
                        $height = (is_object( $file ) && $file->exists()) ? $file->getHeight() : 0;
                        return $height;
                } catch(Exception $e) {
                        return $e->getMessage();
                }                         
        } 
} 
 
function wfSetupImageSizeInfoFunctions() {
        global $wgParser, $wgMessageCache, $wgExtInfoFunctions, $wgMessageCache, $wgHooks;
 
        $wgExtInfoFunctions = new ExtImageSizeInfoFunctions;
 
        $wgParser->setFunctionHook( 'imgw', array( &$wgExtInfoFunctions, 'imageWidth' ) );      
        $wgParser->setFunctionHook( 'imgh', array( &$wgExtInfoFunctions, 'imageHeight' ) );             
 
        require_once( dirname( __FILE__ ) . '/ImageSizeInfoFunctions.i18n.php' );
        foreach( efImageSizeInfoFunctionsMessages() as $lang => $messages )
                $wgMessageCache->addMessages( $messages, $lang );
 
        $wgHooks['ParserClearState'][] = array( &$wgExtInfoFunctions, 'clearState' );
}
 
function wfImageSizeInfoFunctionsLanguageGetMagic( &$magicWords, $langCode ) {
        require_once( dirname( __FILE__ ) . '/ImageSizeInfoFunctions.i18n.php' );
        foreach( efImageSizeInfoFunctionsWords( $langCode ) as $word => $trans )
                $magicWords[$word] = $trans;
        return true;
}