Opening PDF's while specifying dimensions for convert (jsx)

Question

Dear people who know a lot about scripting =),
I recently wrote a small javascript file that opens a dialog that lets me browse for a folder and subsequently open all the .pdf files that are in that folder. I use a script because the documents need to be resized and opened to a maximum width of 1024 px while the height stays below or is equal to 768 px at a resolution of 150. After the script I then usually slightly edit the document and save them as JPEG/PNG.
Since PDFOpenOption no longer allows (CS3+) to specify height/width I cheated a bit. Though this cheat makes the script almost as slow as doing it by hand (e.g. File >> Open, and then set width x height by hand).
The cheat is that I;
1. open the (single page, single image) PDF as a smart object (which adds 'as a Smart Object' the document name)
open(fileList[i], pdfOpenOptions, true)
2. conditionally resize it
     if (
                    (docRef.height < docRef.width) && //based on width or height
                    ( (refWidth/docRef.width)*docRef.height<refHeight ) //make sure that when resizing on width the maximum of refHeight is not overshot
//base on width
                              docRef.resizeImage(refWidth,null,null,ResampleMethod.BICUBIC);
//etc...
3. rasterize the Smart Object layer
docRef.rasterizeAllLayers();
4. duplicate the document, to a new document while omitting the 'as a Smart Object' (No other way to rename the document).
     docRef.duplicate(fileList[i].name);
5. close the original import document
     docRef.close(SaveOptions.DONOTSAVECHANGES);
                              docRef = null;  
All because I can't find out how to set (or retreive) height/width when importing a PDF file.
I'm using Photoshop CS 3 and I was wondering if someone would be as kind to help me adjust the script and speed things up. Hope it's not that complex...
Kind regards,
Chris

Answer 1

You can also use scriptlistener to create an openPDF function that will allow you to specify the dimensions in pixels. Something like this...
function ftn1(docName, ppi, w, h, file) {
  function cTID(s) { return app.charIDToTypeID(s); };
  function sTID(s) { return app.stringIDToTypeID(s); };
    var desc11 = new ActionDescriptor();
        var desc12 = new ActionDescriptor();
        desc12.putString( charIDToTypeID('Nm  '), docName);
        desc12.putEnumerated( charIDToTypeID('Crop'), stringIDToTypeID('cropTo'), stringIDToTypeID('boundingBox') );
        desc12.putUnitDouble( charIDToTypeID('Rslt'), charIDToTypeID('#Rsl'), ppi );
        desc12.putEnumerated( charIDToTypeID('Md  '), charIDToTypeID('ClrS'), charIDToTypeID('RGBC') );
        desc12.putInteger( charIDToTypeID('Dpth'), 8 );
        desc12.putBoolean( charIDToTypeID('AntA'), true );
        desc12.putUnitDouble( charIDToTypeID('Wdth'), charIDToTypeID('#Pxl'), w );
        desc12.putUnitDouble( charIDToTypeID('Hght'), charIDToTypeID('#Pxl'), h );
        desc12.putBoolean( charIDToTypeID('CnsP'), true );
        desc12.putBoolean( stringIDToTypeID('suppressWarnings'), false );
        desc12.putEnumerated( charIDToTypeID('fsel'), stringIDToTypeID('pdfSelection'), stringIDToTypeID('page') );
        desc12.putInteger( charIDToTypeID('PgNm'), 1 );
    desc11.putObject( charIDToTypeID('As  '), charIDToTypeID('PDFG'), desc12 );
    desc11.putPath( charIDToTypeID('null'), file );
    executeAction( charIDToTypeID('Opn '), desc11, DialogModes.NO );
ftn1('docName', 300, 771, 690, new File( "~/Desktop/BlueMirror_HowTo.pdf" ));
Note that because 'Cnsp'( constrain proportions ) is true the w and h arguments work similar to fit image. That is in the example pdf in the code above because of the proportions of the pdf 771 sets with h to 604 instead of the supplied 690. With h set to 590 the w value is changed to 753. You can change 'Cnsp' to false and force the dimensions but that may distort the image.
Also Photoshop will add '-1' to the docName argument so in the example above the doc name is 'docName-1'. It is also set to boundingBox. Use scriptlistener to find the stringIDs for the other crop types.