9-patch-export.js - mozsearch

Enable keyboard shortcuts

// 9-patch export

// Qt-Security score:significant reason:default

//

// This plugin crops upscaled 9-patch PNG assets when exported from Sketch,

// to ensure that 9-patch borders remain 1px wide when upscaled.

//

function onExportSlices(context) {

    var exports = context.actionContext.exports;

    for (var i = 0; i < exports.count(); ++i) {

        var name = exports[i].request.name();

        var scale = exports[i].request.scale();

        if (scale > 1 && name.endsWith(".9"))

            cropAsset(exports[i].path, scale - 1);

function cropAsset(path, inset) {

    var url = NSURL.fileURLWithPath(path);

    var img = CIImage.imageWithContentsOfURL(url);

    var rect = NSInsetRect(img.extent(), inset, inset);

    var cropped = img.imageByCroppingToRect(rect);

    var rep = NSBitmapImageRep.alloc().initWithCIImage(cropped);

    var data = rep.PNGRepresentationWithInterlaced(false);

    data.writeToFile(path);