1. MTASC No more Coffee Break while compiling Nicolas Cannasse Motion-Twin ActionScript Compiler

2. Rich Internet Applications – RIA AJAX Dynamic HTML, RAD, Browser Integration Flash Vector Engine, LowLevel, better control, more powerful

3. MTASC Is an ActionScript version 2 compiler Works from CommandLine  Can be integrated in « your favorite IDE » Is not an IDE :  Can’t edit Flash Graphics or Code Is OpenSource  GPL License, MotionTwin offering support

4. The History of MTASC Prehistory : ActionScript 1 MiddleAge : 09/2003 FlashMX2004 ActionScript2 Need More Checks : 12/2003 ASML Need More Types : 04/2004 MotionTypes Back to AS2 : 10/2004 MTASC Beta 1 01/2005 MTASC 1.0 05/2005 FAME Platform / OSFlash.org 07/2005 MTASC 1.09

5. ASML : ActionScriptMetaLanguage December 2003 Run before Macromedia Compiler Add « Type Inference » to AS2 Check number of parameters (no optional parameters) Faster compilation process

6. Type Inference To « Guess » the types at compilation time function length(o) { return Math.sqrt(o.x*o.x + o.y*o.y); }

7. Type Inference To « Guess » the types at compilation time function length(o : Tmp) : Number { return Math.sqrt(o.x*o.x + o.y*o.y); } Tmp { var x : Number; var y : Number; }

8. Type Inference Pros :  Do not write Types  Your program is still checked  Changes propagate everywhere Cons :  You need to understand how it works  Error reporting is difficult  Typing order matters

9. MotionTypes April 2004 More Types need more Syntax Different Language (.mt files ) Anonymous Types : var o : { x : Number, y : Number }; Lambda Types : var onConnect : Boolean -> Void; First AS1 generation, then SWF generation

10. MTASC Back to AS2 : compatibility Improves Macromedia Compiler :  Faster  More strict Use SWF generation developed for MotionTypes Ready for RIA :  V2 Components  ActionStep

11. MTASC Internals Bunch of AS text files Lexing : produce tokens Parsing : build AST Typing : type-check the AST SWF Code-Generation MTASC is Written in OCAML (www.ocaml.org)

12. Flash Bytecode function add(x,y) { return x + y; } function add x : reg0 y : reg1 push reg0 push reg1 add ret Stack-based Virtual Machine. Registers for local variables (since Flash7).

13. Flash Bytecode function max(x,y) { if( x < y ) return y; else return x; } function max x : reg0 y : reg1 push reg0 push reg1 lt condjump +2 push reg1 ret push reg0 ret Conditional Jumps

14. From AS2 to AS1 class Ref { var v : Number; function Ref(v) { this.v = v; } function add(r : Ref) { r += p.r; } AS2 is Class-based AS1 is Prototype-based if( !Ref ) { _global.Ref = function(r) { this.r = r; } Ref.prototype.add = function(p) { this.r = this.r + p.r; }

15. From AS1 to SWF if( !Ref ) { _global.Ref = function(r) { this.r = r; } Ref.prototype.add = function(p) { this.r = this.r + p.r; } push ‘Ref’ eval not compjump +XXX push ‘_global’ eval push ‘Ref’ function (r:r1) this:r0 push r0 push ‘r’ push r1 objset..

16. MTASC in Numbers MTASC sources (without libs) are :  8 files  113 Ko  20’000 words  4’000 lines It takes 3-4 seconds for compiling more than 300 Classes (20-30 seconds with Macromedia Compiler)

17. The FAMES Platform A complete OpenSource platform : Flashout : SWF Preview, Log ASDT : AS2 Dev. Eclipse plugin MTASC : AS2 Compiler Eclipse : IDE SwfMill : Resources (Fonts, JPEG,…)

18. The FAMES Platform A complete OpenSource platform : Open Source IDE and Tools Edit / Compile / Test Ready for RIA dev  Using Macromedia V2 Components (need license)  Using OS Components More complete everyday  See http://osflash.org

19. Flash OpenSource Tools A lot of tools Available on OSFlash.org General Purpose  AS2Lib, ASUnit… UI Frameworks  ActionStep, EnFlash, ARP, AsWing… Debug/Log  AdminTool Protocols  AMFPHP, OpenAMF… Tutorials, tips, …

20. Questions ?