X-Git-Url: https://git.mdrn.pl/redakcja.git/blobdiff_plain/f17e66aa4210a226669dd96e26295d6f58b94703..43116c58e5c56f94ef358a5a17fb13a252e02531:/redakcja/static/filebrowser/uploadify/com/adobe/serialization/json/JSONEncoder.as

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-/*
-  Copyright (c) 2008, Adobe Systems Incorporated
-  All rights reserved.
-
-  Redistribution and use in source and binary forms, with or without 
-  modification, are permitted provided that the following conditions are
-  met:
-
-  * Redistributions of source code must retain the above copyright notice, 
-    this list of conditions and the following disclaimer.
-  
-  * Redistributions in binary form must reproduce the above copyright
-    notice, this list of conditions and the following disclaimer in the 
-    documentation and/or other materials provided with the distribution.
-  
-  * Neither the name of Adobe Systems Incorporated nor the names of its 
-    contributors may be used to endorse or promote products derived from 
-    this software without specific prior written permission.
-
-  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
-  IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
-  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-  PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 
-  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
-  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-*/
-
-package com.adobe.serialization.json 
-{
-
-	import flash.utils.describeType;
-
-	public class JSONEncoder {
-	
-		/** The string that is going to represent the object we're encoding */
-		private var jsonString:String;
-		
-		/**
-		 * Creates a new JSONEncoder.
-		 *
-		 * @param o The object to encode as a JSON string
-		 * @langversion ActionScript 3.0
-		 * @playerversion Flash 9.0
-		 * @tiptext
-		 */
-		public function JSONEncoder( value:* ) {
-			jsonString = convertToString( value );
-		
-		}
-		
-		/**
-		 * Gets the JSON string from the encoder.
-		 *
-		 * @return The JSON string representation of the object
-		 * 		that was passed to the constructor
-		 * @langversion ActionScript 3.0
-		 * @playerversion Flash 9.0
-		 * @tiptext
-		 */
-		public function getString():String {
-			return jsonString;
-		}
-		
-		/**
-		 * Converts a value to it's JSON string equivalent.
-		 *
-		 * @param value The value to convert.  Could be any 
-		 *		type (object, number, array, etc)
-		 */
-		private function convertToString( value:* ):String {
-			
-			// determine what value is and convert it based on it's type
-			if ( value is String ) {
-				
-				// escape the string so it's formatted correctly
-				return escapeString( value as String );
-				
-			} else if ( value is Number ) {
-				
-				// only encode numbers that finate
-				return isFinite( value as Number) ? value.toString() : "null";
-
-			} else if ( value is Boolean ) {
-				
-				// convert boolean to string easily
-				return value ? "true" : "false";
-
-			} else if ( value is Array ) {
-			
-				// call the helper method to convert an array
-				return arrayToString( value as Array );
-			
-			} else if ( value is Object && value != null ) {
-			
-				// call the helper method to convert an object
-				return objectToString( value );
-			}
-            return "null";
-		}
-		
-		/**
-		 * Escapes a string accoding to the JSON specification.
-		 *
-		 * @param str The string to be escaped
-		 * @return The string with escaped special characters
-		 * 		according to the JSON specification
-		 */
-		private function escapeString( str:String ):String {
-			// create a string to store the string's jsonstring value
-			var s:String = "";
-			// current character in the string we're processing
-			var ch:String;
-			// store the length in a local variable to reduce lookups
-			var len:Number = str.length;
-			
-			// loop over all of the characters in the string
-			for ( var i:int = 0; i < len; i++ ) {
-			
-				// examine the character to determine if we have to escape it
-				ch = str.charAt( i );
-				switch ( ch ) {
-				
-					case '"':	// quotation mark
-						s += "\\\"";
-						break;
-						
-					//case '/':	// solidus
-					//	s += "\\/";
-					//	break;
-						
-					case '\\':	// reverse solidus
-						s += "\\\\";
-						break;
-						
-					case '\b':	// bell
-						s += "\\b";
-						break;
-						
-					case '\f':	// form feed
-						s += "\\f";
-						break;
-						
-					case '\n':	// newline
-						s += "\\n";
-						break;
-						
-					case '\r':	// carriage return
-						s += "\\r";
-						break;
-						
-					case '\t':	// horizontal tab
-						s += "\\t";
-						break;
-						
-					default:	// everything else
-						
-						// check for a control character and escape as unicode
-						if ( ch < ' ' ) {
-							// get the hex digit(s) of the character (either 1 or 2 digits)
-							var hexCode:String = ch.charCodeAt( 0 ).toString( 16 );
-							
-							// ensure that there are 4 digits by adjusting
-							// the # of zeros accordingly.
-							var zeroPad:String = hexCode.length == 2 ? "00" : "000";
-							
-							// create the unicode escape sequence with 4 hex digits
-							s += "\\u" + zeroPad + hexCode;
-						} else {
-						
-							// no need to do any special encoding, just pass-through
-							s += ch;
-							
-						}
-				}	// end switch
-				
-			}	// end for loop
-						
-			return "\"" + s + "\"";
-		}
-		
-		/**
-		 * Converts an array to it's JSON string equivalent
-		 *
-		 * @param a The array to convert
-		 * @return The JSON string representation of <code>a</code>
-		 */
-		private function arrayToString( a:Array ):String {
-			// create a string to store the array's jsonstring value
-			var s:String = "";
-			
-			// loop over the elements in the array and add their converted
-			// values to the string
-			for ( var i:int = 0; i < a.length; i++ ) {
-				// when the length is 0 we're adding the first element so
-				// no comma is necessary
-				if ( s.length > 0 ) {
-					// we've already added an element, so add the comma separator
-					s += ","
-				}
-				
-				// convert the value to a string
-				s += convertToString( a[i] );	
-			}
-			
-			// KNOWN ISSUE:  In ActionScript, Arrays can also be associative
-			// objects and you can put anything in them, ie:
-			//		myArray["foo"] = "bar";
-			//
-			// These properties aren't picked up in the for loop above because
-			// the properties don't correspond to indexes.  However, we're
-			// sort of out luck because the JSON specification doesn't allow
-			// these types of array properties.
-			//
-			// So, if the array was also used as an associative object, there
-			// may be some values in the array that don't get properly encoded.
-			//
-			// A possible solution is to instead encode the Array as an Object
-			// but then it won't get decoded correctly (and won't be an
-			// Array instance)
-						
-			// close the array and return it's string value
-			return "[" + s + "]";
-		}
-		
-		/**
-		 * Converts an object to it's JSON string equivalent
-		 *
-		 * @param o The object to convert
-		 * @return The JSON string representation of <code>o</code>
-		 */
-		private function objectToString( o:Object ):String
-		{
-			// create a string to store the object's jsonstring value
-			var s:String = "";
-			
-			// determine if o is a class instance or a plain object
-			var classInfo:XML = describeType( o );
-			if ( classInfo.@name.toString() == "Object" )
-			{
-				// the value of o[key] in the loop below - store this 
-				// as a variable so we don't have to keep looking up o[key]
-				// when testing for valid values to convert
-				var value:Object;
-				
-				// loop over the keys in the object and add their converted
-				// values to the string
-				for ( var key:String in o )
-				{
-					// assign value to a variable for quick lookup
-					value = o[key];
-					
-					// don't add function's to the JSON string
-					if ( value is Function )
-					{
-						// skip this key and try another
-						continue;
-					}
-					
-					// when the length is 0 we're adding the first item so
-					// no comma is necessary
-					if ( s.length > 0 ) {
-						// we've already added an item, so add the comma separator
-						s += ","
-					}
-					
-					s += escapeString( key ) + ":" + convertToString( value );
-				}
-			}
-			else // o is a class instance
-			{
-				// Loop over all of the variables and accessors in the class and 
-				// serialize them along with their values.
-				for each ( var v:XML in classInfo..*.( name() == "variable" || name() == "accessor" ) )
-				{
-					// When the length is 0 we're adding the first item so
-					// no comma is necessary
-					if ( s.length > 0 ) {
-						// We've already added an item, so add the comma separator
-						s += ","
-					}
-					
-					s += escapeString( v.@name.toString() ) + ":" 
-							+ convertToString( o[ v.@name ] );
-				}
-				
-			}
-			
-			return "{" + s + "}";
-		}
-
-		
-	}
-	
-}