getAllLayers.js

function getHiddenLayers(layers, isParentVisible, hasParent, parentMaskBounds) {

		isParentVisible = _.isUndefined(isParentVisible) ? true : isParentVisible;
		hasParent = hasParent || false;
		parentMaskBounds = parentMaskBounds || false;

		var deferred = Q.defer();

		// Get a list of all the hidden layers
		_.forEach(layers, function(layer) {

			params.pixmap.totalLayers++;

			console.log(_helpers.stringify(layer));

			// Set our min/max
			if ( layer.index > params.pixmap.max ) {
				params.pixmap.max = layer.index;
			}

			if ( layer.index <= params.pixmap.min || params.pixmap.min === 0 ) {
				params.pixmap.min = layer.index;
			}

			// We only need to get the bounds
			// of objects that are outside of 
			// the bounds of the psd so we know
			// how to crop
			// 
			// we need to find out if the root
			// folder is hidden so we can apply 
			// it to all it's children
			var consideredVisible = layer.visible;

			// Parent folder is hidden
			// set visibility to hidden
			if ( hasParent && ! isParentVisible ) {

				consideredVisible = false;

			}

			// No parent, set visibility to current
			// layers visibility
			if ( ! hasParent ) {

				isParentVisible = layer.visible;
			
			}

			// get the bounds of all the visible layers
			if ( consideredVisible ) {

				// Ignore adjustment layers
				// because they throw off the crop
				// and don't actually provide accurate bounds
				if ( layer.type === "adjustmentLayer" ) {

					// console.log("Layer is adjustmentLayer. Ignoring.");
					// return;
				
				}

				// We also want to ignore the bounds
				// if the layer is clipped
				if ( layer.clipped === true ) {

					// console.log("Layer is clipped. Ignoring.");
					// return;

				}

				// If the layer has a mask, we want
				// to use those bounds instead of the 
				// layers bounds, otherwise it doesn't 
				// give an accurate crop
				if ( ! _.isUndefined(layer.mask) ) {

					// We don't want to include mask
					// bounds that are negative because
					// that would mean it's outside the 
					// document, which is useless for 
					// a mask
					layer.bounds.top = layer.mask.bounds.top > 0 ? layer.mask.bounds.top : layer.bounds;
					layer.bounds.left = layer.mask.bounds.left > 0 ? layer.mask.bounds.left : layer.bounds;

					parentMaskBounds = layer.bounds;

				} else if ( _.isObject(parentMaskBounds) ) {

					// The the parent is a mask, we want
					// to set the current bounds to the
					// layers bounds

					layer.bounds = parentMaskBounds;

				} else {

					parentMaskBounds = false;

				}

				//
				// If we have bounds with with FX, we 
				// want to use those instead
				//

				if ( ! _.isUndefined(layer.boundsWithFX) ) {

					layer.bounds = layer.boundsWithFX;

				}

				//
				// Set the offset of the furthest bounds
				// 

				if ( layer.bounds.top < params.pixmap.cropOffset.top ) {

					params.pixmap.cropOffset.top = layer.bounds.top;

				}

				if ( layer.bounds.left < params.pixmap.cropOffset.left ) {

					params.pixmap.cropOffset.left = layer.bounds.left;

				}

			}

			// Layer is hidden, we need to push into
			// the array
			if ( ! consideredVisible ) {
				params.pixmap.hiddenLayers.push(layer.index);
			}

			// We've hit a layer group, so 
			// we want to loop through all
			// it's child layers
			if ( layer.layers ) {

				getHiddenLayers(layer.layers, consideredVisible, true, parentMaskBounds);

			}

			deferred.resolve(params);

			the_promises.push(deferred.promise);

		});

	}

	getHiddenLayers(_document.layers);

	return Q.all(the_promises[0]);

}

gistfile1.txt

[{
    "type": "layer",
    "name": "Clip",
    "visible": true,
    "clipped": true
},
{
    "type": "layer",
    "name": "Clip",
    "visible": true,
    "clipped": true
},
{
    "type": "layer",
    "name": "Clip",
    "visible": true,
    "clipped": true
},
{
    "type": "layer",
    "name": "Clip Parent",
    "visible": false,
    "clipped": false
},
{
    "type": "layer",
    "name": "BG",
    "visible": true,
    "clipped": false
}]