Save as PNGs.jsx

/**********************************************************
 
Save as PNGs.jsx

DESCRIPTION

This sample gets files specified by the user from the 
selected folder and batch processes them and saves them 
as PNGs in the user desired destination with the same 
file name.
 
**********************************************************/

// Main Code [Execution of script begins here]

// uncomment to suppress Illustrator warning dialogs
// app.userInteractionLevel = UserInteractionLevel.DONTDISPLAYALERTS;

var destFolder, sourceFolder, files, fileType, sourceDoc, targetFile;

// Select the source folder.
sourceFolder = Folder.selectDialog('Select the folder with Illustrator files you want to convert to PNG', '~');

// If a valid folder is selected
if (sourceFolder != null) {
    files = new Array();
    fileType = prompt('Select type of Illustrator files to you want to process. Eg: *.ai', ' ');

    // Get all files matching the pattern
    files = sourceFolder.getFiles(fileType);

    if (files.length > 0) {
        // Get the destination to save the files
        destFolder = Folder.selectDialog('Select the folder where you want to save the converted PNG files.', '~');
        for (i = 0; i < files.length; i++) {
            sourceDoc = app.open(files[i]); // returns the document object

            // Call function getNewName to get the name and file to save the PNG
            targetFile = getNewName();

            // Export as PNG
            sourceDoc.exportFile(targetFile, ExportType.PNG24, getPNGOptions());

            sourceDoc.close(SaveOptions.DONOTSAVECHANGES);
        }
        alert('Files are saved as PNG in ' + destFolder);
    }
    else {
        alert('No matching files found');
    }
}




/*********************************************************

getNewName: Function to get the new file name. The primary
name is the same as the source file.

**********************************************************/

function getNewName() {
    var ext, docName, newName, saveInFile, docName;
    docName = sourceDoc.name;
    ext = '.png'; // new extension for file
    newName = "";

    for (var i = 0; docName[i] != "."; i++) {
        newName += docName[i];
    }
    newName += ext; // full name of the file

    // Create a file object to save the png
    saveInFile = new File(destFolder + '/' + newName);


    return saveInFile;
}

/*********************************************************

getPNGOptions: Function to set the PNG saving options of the
files using the ExportOptionsPNG24 object.

**********************************************************/

function getPNGOptions() {
    // Create the ExportOptionsPNG24 object to set the PNG options
    var opts = new ExportOptionsPNG24();

    // Setting ExportOptionsPNG24 properties. Please see the JavaScript Reference
    // for a description of these properties.
    // Add more properties here if you like
    opts.antiAliasing = true;
    opts.artBoardClipping = true;
    opts.horizontalScale = 100.0;
    opts.saveAsHTML = false;
    opts.transparency = true;
    opts.verticalScale = 100.0;

    return opts;
}