Getting the name of the Action that runs this script

Question

If I create a action in photoshop to run a script called "test script", How can I determine within the "test script" what action name started running this script?  I'm trying to write a script to scale my images.  The scaling will be determined by what Action ran this script.
Example
Action Names are 5x7, 4x6, 8x10
Eash action above will run the same script called "scale me"
Within "scale me", the java code will determine that 4x6 started running "scale me"
"scale me" will go to the section within the java code to scale the image loaded in Photoshop to a 4x6 size.
The reason for writing the "scale me" code this way is that I can maintain only one script to scale my images.
Any suggestions or help would be appreciated.
Raymond

Answer 1

Thanks for all your comments.  Micheal, I took your code for the "ActionReference()" object and it works great!  I completed my code and it is working okay (some more testing needed).
*  My Scaling Impage Script  */
var docRef = app.activeDocument;  //Pointer to current opened document
finish:
if (documents.length == 0)      // Check to see if image opened if not, error message
            alert('There are no opened images\r\r' +"Exiting Script");
            break finish;
var savedState = docRef.activeHistoryState      // Save the history state
var originalUnit = preferences.rulerUnits   // Save the existing ruler perferences - units
var ref = new ActionReference();  //Pointer to current selected Action
ref.putEnumerated( charIDToTypeID("Actn"), charIDToTypeID("Ordn"), charIDToTypeID("Trgt") );  // Point to selected Action
var desc = executeActionGet(ref);
var actionName = desc.getString( charIDToTypeID("Nm  ") );  // Get Name of seclected Action
var actionSetName = desc.getString( charIDToTypeID("PrNm") ); // Get Group the selected Action belongs to
var actionnumber = 100;    //actionname =  100  (No Action Defined as default)
var portraitorienation = 0;  // Orientation default to portrait
var resolutions = 300;  // resolution default to 300
var sizeh = 999999;  // default size
var sizew = 999999;  // default size
var resolution = 300;
var scaleup1 = 0;  //enlargement
var scaleup2 = 0;  //enlargement
var scaleflag = 0;
var scaleflagg = 0
//  Assumption is the long side is always defined in sizeh
if (actionName=="4 x 5") { actionnumber =0;  sizeh = 1535; sizew = 1228;}
if (actionName=="4 x 6") { actionnumber =1;  sizeh = 1842; sizew = 1228;}
if (actionName=="5 x 7") { actionnumber =2;  sizeh = 2149; sizew = 1535;}
if (actionName=="6 x 9") { actionnumber =3;  sizeh = 2127; sizew = 1842;}
if (actionName=="8 x 10") { actionnumber =4;  sizeh = 3020; sizew = 2416;}
if (actionName=="8 x 12") { actionnumber =5;  sizeh = 3624; sizew = 2416;}
if (actionName=="11 x 14") { actionnumber =6;  sizeh = 4228; sizew = 3322;}
if (actionName=="12 x 18") { actionnumber =7;  sizeh = 5436; sizew = 3624;}
if (actionName=="12 x 24") { actionnumber =8;  sizeh = 7248; sizew = 3624;}
if (actionName=="12 x 36") { actionnumber =9;  sizeh = 10872; sizew = 3624;}
preferences.rulerUnits = Units.PIXELS
var doch = parseInt (docRef.height);
var docw = parseInt (docRef.width);
scaleflag = doch-docw;
if ( doch > docw ) { scaleflagg =1}
if  (scaleflagg == 0)
                portraitorienation = 1;  // Landscape Orientation
                //alert("Seclected Landscape")
                //alert(doch+" Height" +docw +" Width")
var scale1 = docw - sizeh
var scale2 = doch - sizeh
if (docw > sizeh) {scaleup1=1}
if (doch > sizeh) {scaleup2=1}
// We know know what action was started (What size to scale to and the orientation - Landscape or Portrait)
      //      alert ( "Current selected action is: "+actionName+"\r\rin the action set: "+actionSetName +"\r\rAction Number is " +actionnumber +"\r\rDeminsions are (HxW):  "  +sizeh +", "+sizew );
        if (portraitorienation == 1)   //landscape if true
                        if (scaleup1 == 1)
                                        alert ( "This Photo is landscape\r\r"+ "The doc H x W are:  " +doch +" x " + docw +"\r\r" +"Resizing to (H X W:  " +sizew +", "+ sizeh + "\r\r"  + "Reduction");                               
                                        docRef.resizeImage (sizeh, undefined, resolution, ResampleMethod.BICUBICSHARPER)  // Reduction in size
                        else
                                        alert ( "This Photo is landscape\r\r"+ "The doc H x W are:  " +doch +" x " + docw +"\r\r" +"Resizing to (H X W:  " +sizew +", "+ sizeh + "\r\r"   + "Enlargement");                                       
                                        docRef.resizeImage (sizeh, undefined, resolution, ResampleMethod.BICUBICSMOOTHER)  //Enlargement in size
        else  // portrait
                    if (scaleup2 ==1)
                                        alert ( "This Photo is Portrait\r\r"+ "The doc H x W are:  " +doch +" x " + docw +"\r\r" +"Resizing to (H X W:  " +sizeh +", "+ sizew + "\r\r"  + "Reduction");                                                 
                                       docRef.resizeImage (undefined, sizeh, resolution, ResampleMethod.BICUBICSHARPER)
                        else
                                        alert ( "This Photo is Portrait\r\r"+ "The doc H x W are:  " +doch +" x " + docw +"\r\r" +"Resizing to (H X W:  " +sizeh +", "+ sizew + "\r\r"   + "Enlargement");
                                        docRef.resizeImage (undefined, sizeh, resolution, ResampleMethod.BICUBICSMOOTHER)
preferences.rulerUnits = originalUnit  // Restore ruler perferences - units
My script is a single file that is run by the Actions, I've created for each size and each action runs the same script.  When the script runs, it determines via "ActionReference();" what the current selected Action name is and then applies the scaling.  This script has logic for landscape and portrait and will scale using the different algorithms (bicubic xxxx) depending if it is reducing the image or enlarging.   The parametersfor the scaling is long side and constraint proportions.
So if I have to add another size to the code, all I need to do is to add one line of code to the script, copy any of the existing Actions and rename the copied Action to the size and I am done.
I'm not a experience programmer so pls don't laugh at my coding but have done some C, C++, Fortran (Yes I'm an electrical engineer) in my days.  A number of things has stumped me abit and one of them was the use of arrays which didn't work for me too well.  I was to use the array for storing my parameters of each size.  Another one that really got me puzzled was the use of the docRef = activeDocument object.  The docRef.height and docRef.width will tell you the dimensions of the document based on the units set for rules.  I set mine for pixels.  The problem I had was the statement if(docRef.height > docRef.width) { do some stufff}.  If I change the  > to < for the same document it alway gives me a "true" logical.  After some thoughts today, I suspect that true is anything not 0 and false is only 0.  I will try this out tonight.  This theory does not fit well with my understanding on how the if statement works in other languages.  Any comments on this would be appreciated.
Oh and I noticed some extra code var declarations that is not needed such as the activeHistoryState - was determining if I need to use this or the perferences.rulerunits to restore my ruler perferences and apparently the activeHistoryState does not and forgot to remove from the code.