Subversion Repositories SmartDukaan

/* Compile using: mxmlc --target-player=10.0.0 ZeroClipboard.as */

package {

	import flash.display.Stage;

	import flash.display.Sprite;

	import flash.display.LoaderInfo;

	import flash.display.StageScaleMode;

	import flash.events.*;

	import flash.display.StageAlign;

	import flash.display.StageScaleMode;

	import flash.external.ExternalInterface;

	import flash.system.Security;

	import flash.utils.*;

	import flash.system.System;

	import flash.net.FileReference;

	import flash.net.FileFilter;

	public class ZeroClipboard extends Sprite {

		private var domId:String = '';

		private var button:Sprite;

		private var clipText:String = 'blank';

		private var fileName:String = '';

		private var action:String = 'copy';

		private var incBom:Boolean = true;

		private var charSet:String = 'utf8';

		public function ZeroClipboard() {

			// constructor, setup event listeners and external interfaces

			stage.scaleMode = StageScaleMode.EXACT_FIT;

			flash.system.Security.allowDomain("*");

			// import flashvars

			var flashvars:Object = LoaderInfo( this.root.loaderInfo ).parameters;

			domId = flashvars.id;

			// invisible button covers entire stage

			button = new Sprite();

			button.buttonMode = true;

			button.useHandCursor = true;

			button.graphics.beginFill(0x00FF00);

			button.graphics.drawRect(0, 0, stage.stageWidth, stage.stageHeight);

			button.alpha = 0.0;

			addChild(button);

			button.addEventListener(MouseEvent.CLICK, clickHandler);

			button.addEventListener(MouseEvent.MOUSE_OVER, function(event:Event):void {

				ExternalInterface.call( 'ZeroClipboard.dispatch', domId, 'mouseOver', null );

			} );

			button.addEventListener(MouseEvent.MOUSE_OUT, function(event:Event):void {

				ExternalInterface.call( 'ZeroClipboard.dispatch', domId, 'mouseOut', null );

			} );

			button.addEventListener(MouseEvent.MOUSE_DOWN, function(event:Event):void {

				ExternalInterface.call( 'ZeroClipboard.dispatch', domId, 'mouseDown', null );

			} );

			button.addEventListener(MouseEvent.MOUSE_UP, function(event:Event):void {

				ExternalInterface.call( 'ZeroClipboard.dispatch', domId, 'mouseUp', null );

			} );

			/* External functions

			 * See the PDF version for why this is done this way :-(

			 */

			addCallbacks();

			setInterval( addCallbacks, 1000 );

			// signal to the browser that we are ready

			ExternalInterface.call( 'ZeroClipboard.dispatch', domId, 'load', null );

		}

		public function addCallbacks ():void {

			ExternalInterface.addCallback("setHandCursor", setHandCursor);

			ExternalInterface.addCallback("clearText", clearText);

			ExternalInterface.addCallback("setText", setText);

			ExternalInterface.addCallback("appendText", appendText);

			ExternalInterface.addCallback("setFileName", setFileName);

			ExternalInterface.addCallback("setAction", setAction);

			ExternalInterface.addCallback("setCharSet", setCharSet);

			ExternalInterface.addCallback("setBomInc", setBomInc);

		}

		public function setCharSet(newCharSet:String):void {

			if ( newCharSet == 'UTF16LE' ) {

				charSet = newCharSet;

			} else {

				charSet = 'UTF8';

			}

		}

		public function setBomInc(newBomInc:Boolean):void {

			incBom = newBomInc;

		}

		public function clearText():void {

			clipText = '';

		}

		public function appendText(newText:String):void {

			clipText += newText;

		}

		public function setText(newText:String):void {

			clipText = newText;

		}

		public function setFileName(newFileName:String):void {

			fileName = newFileName;

		}

		public function setAction(newAction:String):void {

			action = newAction;

		}

		public function setHandCursor(enabled:Boolean):void {

			// control whether the hand cursor is shown on rollover (true)

			// or the default arrow cursor (false)

			button.useHandCursor = enabled;

		}

		private function clickHandler(event:Event):void {

			var fileRef:FileReference = new FileReference();

			fileRef.addEventListener(Event.COMPLETE, saveComplete);

			if ( action == "save" ) {

				/* Save as a file */

				if ( charSet == 'UTF16LE' ) {

					fileRef.save( strToUTF16LE(clipText), fileName );

				} else {

					fileRef.save( strToUTF8(clipText), fileName );

				}

			} else if ( action == "pdf" ) {

					fileRef.save( "This instance of ZeroClipboard is not configured for PDF export. "+

						"Please use the PDF export version.", fileName+".txt" );

			} else {

				/* Copy the text to the clipboard. Note charset and BOM have no effect here */

				System.setClipboard( clipText );

				ExternalInterface.call( 'ZeroClipboard.dispatch', domId, 'complete', clipText );

			}

		}

		private function saveComplete(event:Event):void {

			ExternalInterface.call( 'ZeroClipboard.dispatch', domId, 'complete', clipText );

		}

		private function getProp( prop:String, opts:Array ):String

		{

			var i:int, iLen:int;

			for ( i=0, iLen=opts.length ; i<iLen ; i++ )

			{

				if ( opts[i].indexOf( prop+":" ) != -1 )

				{

					return opts[i].replace( prop+":", "" );

				}

			}

			return "";

		}

		/*

		 * Function: strToUTF8

		 * Purpose:  Convert a string to the output utf-8

		 * Returns:  ByteArray

		 * Inputs:   String

		 */

		private function strToUTF8( str:String ):ByteArray {

			var utf8:ByteArray = new ByteArray();

			/* BOM first */

			if ( incBom ) {

				utf8.writeByte( 0xEF );

				utf8.writeByte( 0xBB );

				utf8.writeByte( 0xBF );

			}

			utf8.writeUTFBytes( str );

			return utf8;

		}

		/*

		 * Function: strToUTF16LE

		 * Purpose:  Convert a string to the output utf-16

		 * Returns:  ByteArray

		 * Inputs:   String

		 * Notes:    The fact that this function is needed is a little annoying. Basically, strings in

		 *   AS3 are UTF-16 (with surrogate pairs and everything), but characters which take up less

		 *   than 8 bytes appear to be stored as only 8 bytes. This function effective adds the 

		 *   padding required, and the BOM

		 */

		private function strToUTF16LE( str:String ):ByteArray {

			var utf16:ByteArray = new ByteArray();

			var iChar:uint;

			var i:uint=0, iLen:uint = str.length;

			/* BOM first */

			if ( incBom ) {

				utf16.writeByte( 0xFF );

				utf16.writeByte( 0xFE );

			}

			while ( i < iLen ) {

				iChar = str.charCodeAt(i);

				if ( iChar < 0xFF ) {

					/* one byte char */

					utf16.writeByte( iChar );

					utf16.writeByte( 0 );

				} else {

					/* two byte char */

					utf16.writeByte( iChar & 0x00FF );

					utf16.writeByte( iChar >> 8 );

				}

				i++;

			}

			return utf16;

		}

	}

}