PS Scripting - check if layer link is temporary disabled

I would use this instead:

#include Humanizer.jsx
// github.com/jardicc/ActionManagerHumanizer
// I don't have time rewrite it into pure Action manager code.
var $test = Humanizer.playObject("uiInfo", {
        "null": {
"_enum": "ordinal",
"_ref": "application",
"_value": "targetEnum"
},
        "command": "getCommandEnabled",
        "commandID": 2960
    });
alert($test.result.enabled);

In pure AM this should be faster because asking for whole menu structure is costly. There is huge amount of data.

ID should be static and it's localization independent and also no matter where it is located in menu.

Note: if you have already selected all linked layers then this command is disabled

Works fast. I tried it with 300 layer(Set)s of different kinds with different combinations. Of course that is no answer, because when you have big dimension then saving pixels of each layer to disk my take 1-2 secs for whole document. So it's probably good up to some layers limit (depending of its dimension). Possibly faltting before saving could help? Maybe later I'll try it...

with(psd = new PhotoshopSaveOptions()) {
     layers = !(alphaChannels = embedColorProfile = annotations = spotColors = false)
}
activeDocument.saveAs(fle = File('~/desktop/.psd'), psd, true);
(function() {
     fle.encoding = 'binary', fle.open('r'); var r = fle.read()
     index = r.indexOf('8BIM\x040'), fle.seek(index + 10)
     function bin(v) {return v * fle.readch().charCodeAt()}
     var d = fle.read(L = l = bin(256) + bin(1)), re = /\x00/g
     a = []; while(re.exec(d)) (a.push(re.lastIndex)), b = []
     var r = r.slice(fle.tell(), r.length), re = /8BIMluni/g
     while(a.length && re.exec(r)) {
          if (a[0] + --l == L)  {
               b.push(re.lastIndex - 1), a.shift()
          }
     }
     while(b.length) {
          f = b.shift() + 9, w = ''
          while(!r) w += r[++f], ++f
          a.push(w)
     }
     fle.close(), fle.remove(), alert(a)
})()

I forgot to make case for not disabled layers so make sure you disabled at least one linked layer before you run this script

This workaround looks a bit better. In previous code you know that link group contains disabled link but you didn't know which one.

This uses availability of "select linked" menu item. I suggest modify this code to remember selected linked layers if code will have success. So you can skip all next layers in linked group.

isLinkDisabled();
function isLinkDisabled(){
    try{
        var idslct = charIDToTypeID( "slct" );
            var desc135 = new ActionDescriptor();
            var idnull = charIDToTypeID( "null" );
                var ref63 = new ActionReference();
                var idMn = charIDToTypeID( "Mn  " );
                var idMnIt = charIDToTypeID( "MnIt" );
                var idplacedLayerEditContents = stringIDToTypeID( "selectLinkedLayers" );
                ref63.putEnumerated( idMn, idMnIt, idplacedLayerEditContents );
            desc135.putReference( idnull, ref63 );
        executeAction( idslct, desc135, DialogModes.NO );
        return true;
    }catch(e){
        if(e.number == -25920){ // menu item not available
            return false;
        }
        throw e;
    }
}

I had the same dead end a few months ago:

Determining if the layer link is turned on or off

No answer, no solution.

PS is clearly not designed to be scripted.