Check the file type after JavaScript File.openDialog ()...

So I am on Mac OS and want my script obviously cancel on the bottle of 'Cancel', but also check if the selected file is a PDF file. I had some success with the code below, but some PDF, I select get cancelled with this script. While they inspected, the FilePath.type property returns "?" for some PDF files - anyone know why?

var myFilePath = File.openDialog("Please choose a PDF file...", undefined, false);
if((myFilePath == "") || (myFilePath == null)){
    exit();
}
else if(myFilePath.type != "PDF "){
    alert("Please choose a PDF file!") ;
    exit();
}

I'm quite new to scripting. Thank you!

On Windows, all you can do is provide a file extension (the well-known "*.") PDF filter"), and it is wise to always add the catch-all" *. " ' * ' to 'all files '. In this way, a user can select a file, even if she has a bad job (and in this case, it is the responsibility of the user to ensure that the file is of the type expected nonetheless).

Under OSX, there are two options:

1. the file has the correct ' Creator/Type' metadata; and/or

2. the file has the correct file extension.

Historically, focused on the Macintosh OS used option #1 and software should not look at the actual file names. However, who soon became unfeasible when people tried to share files between Mac and (almost all) other systems. That lead to various tools to "attribute" Data Type/Creator of known file extensions, so they can be opened with the right software on Mac. Also the reverse that's happened; saving a file "without extension" on a Mac was not a problem, but to open it in Windows, you often had to add the right extension.

So, somewhere around one or two versions of the system there, Apple has decided to return to the old, trust "File Extension." But OSX still records the Type/Creator metadata for files created on your Mac. Control of the 'type' should work then - but the problem is, what happens if you got your file also? The extension may be correct, but if she has any type of file, your script won't see it.

Fortunately, the open a Mac OS x file dialogue box allows some pretty wicked customizations. Never forget a file filter, you can run a custom function which decides for each separate file and the folder should be adjustable or not. The function has access to all the file attributes. You can go up to check the name of the file and dismiss all files that contain a 'q', or the files are read-only, or that are smaller than 1 KB.

Check out this piece of code (I wrote it myself, but various tips and tricks have been played on this same forum):

if (File.fs == "Windows")
    pdfFile = Folder.myDocuments.openDlg( 'Load PDF document', "Adobe PDF:*.pdf,All files:*.*", false);
else
    pdfFile = Folder.myDocuments.openDlg( 'Load PDF document', function(file) { return file instanceof Folder || (!(file.hidden) && (file.name.match(/\.pdf$/i) || file.type == "PDF ")); }, false );

(I advise you to copy the fragment of Windows, just in case your script will ' world tour.)

Tags: InDesign

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