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PDF-ShellTools => Ideas/Suggestions => Topic started by: nightslayer23 on October 12, 2022, 06:48:32 AM

Title: Script For Shuffle (Random)
Post by: nightslayer23 on October 12, 2022, 06:48:32 AM

Hi again, would you be able to write a custom script for shuffling the PDF page order from a multipage pdf?

Title: Re: Script For Shuffle (Random)
Post by: RTT on October 13, 2022, 01:54:28 AM

Check if this works.

Code: [Select]

var Merger = pdfe.CreateDocumentMerger();
var ProgressBar = pdfe.ProgressBar;
ProgressBar.max = pdfe.SelectedFiles.Count;
var MainPageIndex = 0;
for (var i = 0; i < pdfe.SelectedFiles.Count; i++) {
    var File = pdfe.SelectedFiles(i);
    var Filename = File.Filename;
    pdfe.echo('Shuffling ' + Filename);
    ProgressBar.position = i + 1;
    var Pages = File.Pages;
    ShuffledIndexesArray = createShuffledIndexesArray(Pages.Count);

    for (var p = 0; p < ShuffledIndexesArray.length; p++) {
        var Page = Pages(ShuffledIndexesArray[p]);
        Merger.MergePage(Page);
    }
    var newFilename = Filename.substring(0, Filename.lastIndexOf('.')) + '_Shuffled.pdf';
    Merger.EndAndSaveTo(newFilename);
    pdfe.echo(' [OK]', 0, 1);
}
pdfe.echo('Done.');

/*https://stackoverflow.com/questions/2450954/how-to-randomize-shuffle-a-javascript-array
Randomize array in-place using Durstenfeld shuffle algorithm */
function shuffleArray(array) {
    for (var i = array.length - 1; i > 0; i--) {
        var j = Math.floor(Math.random() * (i + 1));
        var temp = array[i];
        array[i] = array[j];
        array[j] = temp;
    }
}

function createShuffledIndexesArray(N) {
    var Indexes = [];
    for (var i = 0; i < N; i++) {
        Indexes.push(i);
    }
    shuffleArray(Indexes);
    return Indexes
}


Title: Re: Script For Shuffle (Random)
Post by: nightslayer23 on October 13, 2022, 02:59:12 AM

worked perfectly   ;D ;D thankyou again!