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Javascript in Amaya

From: fwsmail35 <fwsmail35@aol.com>
Date: Thu, 10 May 2007 16:53:32 +0200
Message-ID: <464331EC.50603@aol.com>
To: www-amaya-dev@w3.org
Hello,

Five years ago, some people wanted to integrate javascript in Amaya. 
Paul Cheyrou-lagreze proposed to use SpiderMonkey, the Mozilla's 
interpreter, but I guess nothing has been done until now. Here is the 
message he posted : 
http://lists.w3.org/Archives/Public/www-amaya-dev/2002Aug/0007.html

I started a bit the work : you can now execute a script contained in an 
external file, or between <script type="text/javascript"></script>. For 
the moment, you can only manipulate objects/functions that do not 
require informations about the structure of the document (such as 
Math.abs) and also alert() and confirm() (implementation of prompt is 
not finished yet). Errors are reported in a dialog box, but this has to 
be improved.

To integrate javascript in Amaya source code, follow these instructions :

- compile Spidermonkey (download the source code at 
http://www.mozilla.org/js/spidermonkey/ ). Normally this is possible in 
Linux, Mac and Windows but I can only test with the first. On Linux, you 
have to go to the directory js/src/ and "make -f Makefile.ref". On 
Ubuntu, I got errors that I solved thanks to the following page :  
http://milindalakmal.wordpress.com/2007/02/21/compiling-spidermonkey/ .

- put the javascript.c file in the Amaya/amaya/ directory

- change the Makefile.in from Amaya/amaya/ to integrate new files :
   1) in AMAYA_OBJ =, add the file javascript.o and libjs.so (the latter 
can be founded in SpiderMonkey compilation directory)
   2) add informations to compile javascript.c. The two important things 
is to add the location of jsapi.h (I put it in 
/usr/local/include/spidermonkey) and the option -DXP_UNIX (other options 
must be added for windows or mac). Here is the lines I added :
   javascript.o : javascript.c
    $(CXX) $(CXXFLAGS) $(ALL_AMAYA_OPTIONS) $(INCLUDES) 
-I/usr/local/include/spidermonkey -DXP_UNIX -c @srcdir@/javascript.c -o $@

- In Amaya/amaya/init.c, in function AmayaClose, after the line 
"RemoveDocumentImages (0);", add "DestroyJavascript ();". This is to 
free the memory used by spidermonkey when closing Amaya.

- Add a way to launch the interpreter. I chosed to use a shortcut.
  1) In Amaya/amaya/EDITOR.a, add InitJavascript to the list of 
functions (for instance after ...CreateMSINH, CreateMTAN, CreateMTANH)
  2) In Amaya/config/amaya.keyboard, add the shortcut to launched 
InitJavascript : "Ctrl <Key>j , Ctrl <Key>j:         InitJavascript() "

- You can now launch Amaya and test javascript : each time you make 
"Ctrl j j", the scripts contained in the current document (in formatted 
view) are executed.

Some questions : Can somebody tell me which functions give the location 
of a document, and the line of an Element (for Error report). I would 
also like to know how to get the callback in javascript.c (for the 
function prompt).

Fred


Received on Thursday, 10 May 2007 14:53:51 UTC

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