Generative Fill Property Panel Arrows for Variations

@redflyr 

Until Adobe possibly implement such a feature, you can use the following script. Install it in the application/program folder's Presets/Scripts and assign a custom keyboard shortcut or record into an action for use with an F-key:

/*
Cycle Through Generative Fill Variations.jsx
v1.0 - 19th November 2024, Stephen Marsh
https://community.adobe.com/t5/photoshop-ecosystem-ideas/generative-fill-property-panel-arrows-for-variations/idi-p/14984091

Note: If more than 1 generative fill layer is present, the script will lose track of the last used index when switching between layers and variations!

Originally based on code from c.pfaffenbichler:
https://community.adobe.com/t5/photoshop-ecosystem-discussions/is-there-a-quot-simple-quot-way-to-export-all-generation-variations/m-p/14442568
*/

#target photoshop;

try {
    if (app.documents.length) {
        selectNextGenerativeFillVariation();
    }
} catch (e) { }

function getCurrentGenerativeFillIndex() {
    try {
        var desc = new ActionDescriptor();
        var ref = new ActionReference();
        ref.putEnumerated(stringIDToTypeID("layer"), stringIDToTypeID("ordinal"), stringIDToTypeID("targetEnum"));
        desc.putReference(stringIDToTypeID("null"), ref);
        var result = executeAction(stringIDToTypeID("get"), desc, DialogModes.NO);

        if (result.hasKey(stringIDToTypeID("index"))) {
            return result.getInteger(stringIDToTypeID("index"));
        }
    } catch (e) {
        // Fall back to stored environment variable if current index cannot be fetched
    }
    return getLastUsedIndex();
}

function getLastUsedIndex() {
    var storedIndex = $.getenv("generativeFillIndex"); // Get the last used index from the environment variable
    return storedIndex ? parseInt(storedIndex) : 0;
}

function saveLastUsedIndex(index) {
    $.setenv("generativeFillIndex", index.toString()); // Save the index in the environment variable
}

function selectNextGenerativeFillVariation() {
    var lastIndex = getCurrentGenerativeFillIndex(); // Fetch the current active index
    var nextIndex = lastIndex + 1;
    var successfulSelection = selectGenerativeFillVariation(nextIndex);

    if (!successfulSelection) {
        nextIndex = 0; // Reset to the first variation
        successfulSelection = selectGenerativeFillVariation(nextIndex);
    }
    if (successfulSelection) {
        saveLastUsedIndex(nextIndex);
    }
}

function selectGenerativeFillVariation(theIndex) {
    try {
        if (!app.activeDocument.activeLayer) {
            return false;
        }
        var desc239 = new ActionDescriptor();
        var ref6 = new ActionReference();
        ref6.putEnumerated(stringIDToTypeID("layer"), stringIDToTypeID("ordinal"), stringIDToTypeID("targetEnum"));
        desc239.putReference(stringIDToTypeID("null"), ref6);
        desc239.putInteger(stringIDToTypeID("index"), theIndex);
        executeAction(stringIDToTypeID("selectGeneratedVariation"), desc239, DialogModes.NO);
        return true;
    } catch (e) {
        return false;
    }
}

https://prepression.blogspot.com/2017/11/downloading-and-installing-adobe-scripts.html