//written by Chris "Funky Bunnies" Whitaker
//www.funkybunnies3d.com
//simple script to toggle visibility of any layers named UV, UVs, or prefixed with TGL_

//installation: drop script file into Program Files/Adobe/PhotoshopCS2/Presets/Scripts
//now upon photoshop restart it'll show up in File->Scripts
//you can set it to a hotkey (F4 maybe?) with Edit->KeyboardShortcuts->ApplicationMenus->File->Scripts

#target photoshop
app.bringToFront();


//if you don't want it to check within layer groups as well, set next line to false;
var checkLayerSets = true;

//if you want it to check for only the first layer it finds, set next line to false;
var findAll = false;


//run main function
uvTGL();

function uvTGL()
{
	if (app.documents.length <= 0) 
		{
			//alert("There are no documents open!", "UV visibility toggle");
			return;
		}
	var activeDoc = app.activeDocument;
	
	//traverse through layers to find any non-layergroup named "UV", "UVS" or prefixed with "TGL_"
	for(var i =0;i<activeDoc.layers.length;i++)
		{
			var KeepGoing = true
			if (activeDoc.layers[i].typename == "LayerSet" && checkLayerSets) //if layerset is found, run loop function below
				KeepGoing = uvTGL_Layerset(activeDoc.layers[i])
			else
			{
				var currLayerName = activeDoc.layers[i].name.toLowerCase()
				if(currLayerName =="uvs" || currLayerName =="uv" || currLayerName =="uv's" || currLayerName.substr(0,4) == "tgl_") 
				{
					activeDoc.artLayers[i].visible = !activeDoc.artLayers[i].visible;
					if (!findAll) return; //if set to only find first instance, exit function
				}
			}
			if (!KeepGoing) //if found an instance within a layergroup and set to only find once, exit function
				return;
		}
}

function uvTGL_Layerset(currLayerSet)
{
	var KeepGoing = true
	//traverse through layers of layerset to find any non-layergroup named "UV", "UVS" or prefixed with "TGL_"
		for(var j =0;j<currLayerSet.layers.length;j++)
		{
			if (currLayerSet.layers[j].typename == "LayerSet") //if layerset is found, run this function
				KeepGoing = uvTGL_Layerset(currLayerSet.layers[j]) //pass a flag to exit if found and findAll is false
			else
			{
				var currLayerName = currLayerSet.layers[j].name.toLowerCase();
				if (currLayerName == "uvs" || currLayerName == "uv" || currLayerName.substr(0,4) == "tgl_" )
				{
					currLayerSet.layers[j].visible = !currLayerSet.layers[j].visible
					if (!findAll) return false; //return a flag to exit (to return in either this function or main function)
				}
			}
			if (!KeepGoing ) return false; //return a flag to exit (to return in either this function or main function)
		}
		return true; //otherwise return true since an entire loop was finished
}