first commit of free version

admin/compiler/joomla_3/wideimage/MapperFactory.php

@@ -0,0 +1,126 @@
+<?php
+	/**
+ * @author Gasper Kozak
+ * @copyright 2007-2011
+
+    This file is part of WideImage.
+		
+    WideImage is free software; you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation; either version 2.1 of the License, or
+    (at your option) any later version.
+		
+    WideImage 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 Lesser General Public License for more details.
+		
+    You should have received a copy of the GNU Lesser General Public License
+    along with WideImage; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+    
+    * @package WideImage
+  **/
+	
+	/**
+	 * Thrown when image format isn't supported
+	 * 
+	 * @package Exceptions
+	 */
+	class WideImage_UnsupportedFormatException extends WideImage_Exception {}
+	
+	/**
+	 * Mapper factory
+	 * 
+	 * @package Internals
+	 **/
+	abstract class WideImage_MapperFactory
+	{
+		static protected $mappers = array();
+		static protected $customMappers = array();
+		
+		static protected $mimeTable = array(
+			'image/jpg' => 'JPEG', 
+			'image/jpeg' => 'JPEG', 
+			'image/pjpeg' => 'JPEG', 
+			'image/gif' => 'GIF', 
+			'image/png' => 'PNG'
+			);
+		
+		/**
+		 * Returns a mapper, based on the $uri and $format
+		 * 
+		 * @param string $uri File URI
+		 * @param string $format File format (extension or mime-type) or null
+		 * @return WideImage_Mapper
+		 **/
+		static function selectMapper($uri, $format = null)
+		{
+			$format = self::determineFormat($uri, $format);
+			
+			if (array_key_exists($format, self::$mappers))
+				return self::$mappers[$format];
+			
+			$mapperClassName = 'WideImage_Mapper_' . $format;
+			
+			if (!class_exists($mapperClassName, false))
+			{
+				$mapperFileName = WideImage::path() . 'Mapper/' . $format . '.php';
+				if (file_exists($mapperFileName))
+					require_once $mapperFileName;
+			}
+			
+			if (class_exists($mapperClassName))
+			{
+				self::$mappers[$format] = new $mapperClassName();
+				return self::$mappers[$format];
+			}
+			
+			throw new WideImage_UnsupportedFormatException("Format '{$format}' is not supported.");
+		}
+		
+		static function registerMapper($mapper_class_name, $mime_type, $extension)
+		{
+			self::$customMappers[$mime_type] = $mapper_class_name;
+			self::$mimeTable[$mime_type] = $extension;
+		}
+		
+		static function getCustomMappers()
+		{
+			return self::$customMappers;
+		}
+		
+		static function determineFormat($uri, $format = null)
+		{
+			if ($format == null)
+				$format = self::extractExtension($uri);
+			
+			// mime-type match
+			if (preg_match('~[a-z]*/[a-z-]*~i', $format))
+				if (isset(self::$mimeTable[strtolower($format)]))
+				{
+					return self::$mimeTable[strtolower($format)];
+				}
+			
+			// clean the string
+			$format = strtoupper(preg_replace('/[^a-z0-9_-]/i', '', $format));
+			if ($format == 'JPG')
+				$format = 'JPEG';
+			
+			return $format;
+		}
+		
+		static function mimeType($format)
+		{
+			return array_search(strtoupper($format), self::$mimeTable);
+		}
+		
+		static function extractExtension($uri)
+		{
+			$p = strrpos($uri, '.');
+			if ($p === false)
+				return '';
+			else
+				return substr($uri, $p + 1);
+		}
+	}