I have a simple UI for my artists that does some modifications to his files then saves it to the folder of his choice.
However it gets quickly tedious to re-enter the path every time he uses the script.
I would like to remember the path he previously entered or use the path that Photoshop uses as a default.
How can that be done?
Here's the script if someone is interested, it allows you to save out your groups as PNG's with possible additional blurred versions:
Photoshop PNG Blur Save - Pastebin.com
Message was edited by: Jeremy Vansnick
1 Correct answer
Change beginning of your script to:
PTH = ""; displayDialogs = DialogModes.NO
var Path = $.getenv('pth') || PTH || "d/";
// for saving files
var doc = app.activeDocument;
And in the middle where you last time insterted new part, edit that to:
dlg.show();
$.setenv('pth', Path.slice(1))
if (PTH != ge = $.getenv('pth')) {
(fle = File($.fileName)).open('r'), jsxFile = fle.read()
.replace(/"(.*)"(?=;)/, '"' + ge + '"'), fle.close()
fle.open('w'), fle.write(jsxFile), fle.close()
}
Additionally what
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There are 4 mistakes in code. Actually one four-fold, and honestly two double. Script can't save (at least for me) as far as there is AUTOMATIC set for ResampleMethod. Correctly there should be ResampleMethod.BICUBIC. in all four places 
To answer your question:
- change var Path = "D:\\GameDevelopment"; to var Path = $.getenv('pth') || "d/";
- and right after dlg.show(); insert another line: $.setenv('pth', Path.slice(1))
If your base image is 512*512 with any px/in resololution to use 1px of Guassian Blur for it apply this pattern for other images:
Math.blur = function(v1, v2) {with(this) {with(activeDocument) {activeLayer.applyGaussianBlur(v1 * ((sqrt = sqrt(width * height / pow(v2, 2))) + sqrt) / (pi = PI) * pi / 2)}}}
You call it for ex. by Math.blur(5, 512)​, where 5 is Radius in Pixels, while 512 is side length of square document. If you want to refer to rectangle, then you have to obtain square of width multiplied by height. So if your prefered dimension is 512*512, you're sure that 1 px Gaussian Blur radius applied fits your goal, then all other documents with bigger or smaller dimension when you use Math.blur(5, 512) function will get appriopate "intensity/percentage". So when there is document 512*512 it'll get 5 Radius value, so exactly that you would manually enter into a Gaussain Blur box. If that will be 6000 * 4500 document then 5 Radius value will be changed by the function to 50.7 value, the same you had to enter manually into blur blank to get exactly same intensity you do entereing 5 for 512 * 512. And if that was 400 * 600 document then 5 value will be changed to 4.8 as 240000 is smaller than 262144. For those who want the pattern other way wrote than used in JavaScript code it's:
radius * (2 * (sqaure of (width * height) / (average length of prefered document side) to power of 2)) / PI * (PI / 2)
so basicly the same what (as I just found it calculating it again to make it simpler 
😞
radius * (sqaure of (width * height) / (average length of prefered document side) to power of 2)
finally you can change a code from a top of this post to shortened version that gives the same result:
Math.blur = function(v1, v2) {with(Math) {with(activeDocument) {activeLayer.applyGaussianBlur(v1 * sqrt(width * height / pow(v2, 2)))}}}
1) The function you modified can be simplified to:
function blr(v1, v2) {with(Math) return v1 / sqrt(pow(5000, 2) / v2)}
as with this construction you don't use with statement with activeDocument.
Anyway I compared both, yours and mine where for example there are 512*490 document with 5px gaussian blur radius.
mine:
Math.blur = function(v1, v2) {with(this) with(activeDocument) return v1 * sqrt(width * height / pow(v2, 2))} Math.blur(5, 512)
yours:
function blr(v1, v2) {with(Math) return v1 / sqrt(pow(5000, 2) / v2)} blr(5, (aD = activeDocument).width * aD.height)
Mine gives 4.89139 while yours 0.50087. If you used 5120, then your result was 0.48913. So 10 times smaller than mine.
But if you used 512 instead of 5120 then, both yours and mine function gave the same result, so 4.89139.
Of course if I did appriopate changes in my function ie. changed base square of width * height, so 512 to 500 multiplied by 10, by Math.blur(5, 5000), it was 0.50087.
That you use 5000, not 5120 is probably because there is not big difference between these numbers, so you just 'rounded' it.
Now you can use:
function blr(v1, v2) {with(Math) return v1 / sqrt(pow(5120, 2) / v2)}
(aD = activeDocument).activeLayer.applyGaussianBlur(blr(blurStrength, aD.width * aD.height))
or still:
Math.blur = function(v1, v2) {with(this) with(activeDocument) activeLayer.applyGaussianBlur(v1 * sqrt(width * height / pow(v2, 2)))}
Math.blur(blurStrength, 5000) // where you see you didn't need new function, since you may simply replace 512 with 5000
The only thing I dont understand why you used 10 times bigger base value? Now each time you enter blurStrength Radius value to your function you can't get enough strong blur with little 'handy' amount if you didn't concatenated 0 at the end?
2) I do all for myself, there is no motivation in my doings, especially to help anybody. I don't try to be of assistance, that's not my point. So you simply got luck I was willing to do another interesting to me programming crossword. As you see I don't think much of it what it is for. There's no reason to be here other than having fun of purely egoistic satisfaction that gives finding solutions for questions I couldn't realise they exist. So far I never was aware I can do things looking how to:
- save path to the script I'm running at the same moment
- use blur radius proportionally to document dimension
- collapse layer sets by a method there's no exist
that was like another game levels to achieve, where each next one was more tricky.
3) The site from link you gave wants me to log in to see the content, despite previous ones you shared were available for guests too. Maybe just upload it other way, or else update old one? For now I can not look over your new corrected code.
4) Use this function right after saving, but before closing document, so with new document opening, folders will be closed:
;(function(){
(fle = activeDocument.fullName).encoding = 'binary',
fle.open('r'), rep = fle.read().replace(/\x018BIMp/ig,
'\x028BIMp'), fle.open('w'), fle.write(rep), fle.close()
})()
Do you have some bell on your computer ringing to you I just posted? 
PTH = "C/Users/Feast/Desktop/Test"; displayDialogs = DialogModes.NO
var Path = $.getenv('pth') || PTH || "d/";
// for saving files
var doc = app.activeDocument;
var Name = doc.name.replace(/\.[^\.]+$/, '');
var Prefix = "";
var Suffix = "";
var BlurAmount = [2,4,7];
var DivideScaleBlurAmount = [1.25,1.5,2];
var AddBlur = false;
var AddVeg = false;
var AddSP = false;
var AllowNonGroupLayers = false;
var Res = 512;
var DocTrimmedWidth = 0;
var DocTrimmedHeight = 0;
var BlurredTrimmedWidth = 0;
var BlurredTrimmedHeight = 0;
var saveFile = File(Path + "/" + Name + Suffix + ".jpg");
var dlg = new Window('dialog', 'PNG Batch Save');
var G1 = dlg.add('group', undefined, '');
dlg.msgSt = G1.add('statictext', undefined,
'Path:');
dlg.msgSt.alignment = [ScriptUI.Alignment.LEFT,
ScriptUI.Alignment.TOP]
dlg.msgEt = G1.add('edittext', [0,0,500,20],
Path, {name: "path",multiline:false,noecho:false,readonly:false});
dlg.msgSt = G1.add('statictext', undefined,
'Reso:');
dlg.msgEt = G1.add('edittext', [0,0,40,20],
Res, {name: "Res"});
// Resolution UI
dlg.msgPnl = dlg.add('panel', undefined, '');
dlg.msgPnl.orientation = "row";
dlg.titleSt = dlg.msgPnl.add('statictext', undefined,
'Prefix:');
dlg.titleEt = dlg.msgPnl.add('edittext', [0,0,100,20],
Prefix, {name: "Prefix"});
// Add a checkbox to control the buttons that dismiss an alert box
dlg.hasBtnsCb = dlg.msgPnl.add('checkbox', undefined,
'SP', {name: "SP"});
dlg.hasBtnsCb.value = true;
dlg.hasBtnsCb = dlg.msgPnl.add('checkbox', undefined,
'B', {name: "Blur"});
dlg.hasBtnsCb.value = true;
// Add a checkbox to control the buttons that dismiss an alert box
dlg.hasBtnsCb = dlg.msgPnl.add('checkbox', undefined,
'VG', {name: "Veg"});
dlg.hasBtnsCb.value = false;
dlg.hasBtnsCb = dlg.msgPnl.add('checkbox', undefined,
'Render Ungrouped', {name: "allowLayers"});
dlg.hasBtnsCb.value = false;
dlg.msgPnl.btn = dlg.msgPnl.add('button', undefined, 'Export', {name:"export"});
dlg.msgPnl.btn.onClick = Algorithm;
dlg.msgPnl.buildBtn = dlg.msgPnl.add('button', undefined, 'Cancel');
function key_handle(e)
{
switch (e.keyIdentifier)
{
case "Enter":
//~ dlg.btnPnl.btn.notify();
Algorithm();
break;
}
}
dlg.msgEt.active = true;
dlg.addEventListener ("keydown", key_handle, false);
dlg.show();
// Algorithm must be called when clicking on Export button
function Algorithm()
{
GetUIValues();
SetSuffix();
$.setenv('pth', Path.slice(1))
if (PTH != ge = $.getenv('pth')) {
(fle = File($.fileName)).open('r'), jsxFile = fle.read()
.replace(/"(.*)"(?=;)/, '"' + ge + '"'), fle.close()
fle.open('w'), fle.write(jsxFile), fle.close()
}
dlg.close();
var doc = app.activeDocument;
// need an array to know which grp was on or off
var oldLayers = new Array();
for (var i = 0; i < doc.layerSets.length; i++) {
if (doc.layerSets.visible == true) {
oldLayers.push(1);
};
if (doc.layerSets.visible == false) {
oldLayers.push(0); // not visible
};
doc.layerSets.visible = false;
};
// set all non-groups layers off
var oldNonGroupLayers = new Array();
if (AllowNonGroupLayers == false)
{
for (var i = 0; i < doc.layers.length; i++) {
if (doc.layers.visible == true) {
oldNonGroupLayers.push(1);
};
if (doc.layers.visible == false) {
oldNonGroupLayers.push(0); // not visible
};
doc.layers.visible = false;
}
}
for (var i = 0; i < doc.layerSets.length; i++) {
// if the layer used to be visible
if (oldLayers == 1) {
//alert("Found a visible grp!");
// we set it visible
doc.layerSets.visible = true;
TrimResizeAndSave(doc.layerSets);
if (AddBlur)
{
for (var j = 1; j <= BlurAmount.length; j++)
{
var currentBlur = BlurAmount[j-1];
CreateBlurredVersion(doc.layerSets, currentBlur, j, DivideScaleBlurAmount[j-1]);
}
}
// we set it invisible again
doc.layerSets.visible = false;
};
}
// set whichever groups were originally on visible again
for (var i = 0; i < doc.layerSets.length; i++) {
if (oldLayers == 1)
doc.layerSets.visible = true;
}
// set whichever non-group layers were originally on visible again
if (AllowNonGroupLayers == false)
{
for (var i = 0; i < doc.layers.length; i++) {
if (oldNonGroupLayers == 1)
doc.layers.visible = true;
}
}
;(function(){
(fle = activeDocument.fullName).encoding = 'binary',
fle.open('r'), rep = fle.read().replace(/\x018BIMp/ig,
'\x028BIMp'), fle.open('w'), fle.write(rep), fle.close()
})()
alert("Finished exporting files");
}
function GetUIValues() {
Res = dlg.findElement("Res").text;
AddBlur = dlg.findElement("Blur").value;
AddVeg = dlg.findElement("Veg").value;
AddSP = dlg.findElement("SP").value;
Prefix = dlg.findElement("Prefix").text;
AllowNonGroupLayers = dlg.findElement("allowLayers").value;
Path = dlg.findElement("path").text;
var c = /\\/g;
if (Path.match(c)) {
//~ alert("found \\");
Path = Path.replace(c, "/");
};
c = ':';
if (Path.match(c )) {
//~ alert("found :");
Path = Path.replace(c , '');
};
Path = "/" + Path;
}
function SaveJPEG(saveFile, jpegQuality) {
jpgSaveOptions = new JPEGSaveOptions();
jpgSaveOptions.embedColorProfile = true;
jpgSaveOptions.formatOptions = FormatOptions.STANDARDBASELINE;
jpgSaveOptions.matte = MatteType.NONE;
jpgSaveOptions.quality = jpegQuality;
activeDocument.saveAs(saveFile, jpgSaveOptions, true, Extension.LOWERCASE);
}
function SavePNG(saveFile) {
pngSaveOptions = new PNGSaveOptions(9, false);
activeDocument.saveAs(saveFile, pngSaveOptions, true, Extension.LOWERCASE);
}
function TrimResizeAndSave(group) {
var doc = app.activeDocument;
var savedState = doc.activeHistoryState;
// trim
doc.trim(TrimType.TRANSPARENT, true, true, true, true);
// we need to find the current width and height of the picture now
// this way we can find the right amount of pixels the picture should be blurred
// to keep the blur even across all the pictures.
// ========== set units to pixels ==========//
var oldPrefs = app.preferences.rulerUnits;
app.preferences.rulerUnits = Units.PIXELS;
DocTrimmedWidth = doc.width;
DocTrimmedHeight = doc.height;
// resize algorithm
if (DocTrimmedHeight > DocTrimmedWidth) {
doc.resizeImage(null, UnitValue(Res, "px"),72, ResampleMethod.BICUBIC, 100);
}
else {
doc.resizeImage(UnitValue(Res, "px"), null, 72, ResampleMethod.BICUBIC, 100);
}
app.preferences.rulerUnits = oldPrefs;
// we save the ouput
if (AddBlur)
saveFile = File(Path + "/" + "B0-" + Prefix + group.name + Suffix + ".png");
else saveFile = File(Path + "/" + Prefix + group.name + Suffix + ".png");
SavePNG(saveFile);
doc.activeHistoryState = savedState;
}
function CreateBlurredVersion(group, blurStrength, number, scale)
{
var doc = app.activeDocument;
var savedState = doc.activeHistoryState;
var blurredPath = File(Path + "/" + "B" + number + "-" + Prefix + group.name + Suffix + ".png");
var theName = group.name;
// we need to find the current width and height of the picture now
// this way we can find the right amount of pixels the picture should be blurred
// to keep the blur even across all the pictures.
// ========== set units to pixels ==========//
var oldPrefs = app.preferences.rulerUnits;
app.preferences.rulerUnits = Units.PIXELS;
doc.activeHistoryState = savedState;
// transform document to smart object
//~ var result = createSmartObject(group);
var result = group.merge();
// gaussian blur
//result.applyGaussianBlur(blurStrength, blurStrength);
//~ (aD = activeDocument).activeLayer.applyGaussianBlur(blurStrength * (sqrt = Math.sqrt(aD.width * aD.height / Math.pow(512, 2))) + sqrt / Math.PI / aD.resolution * 72)
//~ Math.blur = function(v1, v2) {with(Math) {with(activeDocument) {activeLayer.applyGaussianBlur(v1 * sqrt(width * height / pow(v2, 2)))}}}
//~ Math.blur = function(v1, v2) {with(Math) {with(activeDocument) {activeLayer.applyGaussianBlur(v1 * sqrt(width * height / pow(v2, 2)))}}}
var v2= DocTrimmedWidth * DocTrimmedHeight;
Math.blur = function(v1, v2) {with(Math) {with(activeDocument) {return v1 / sqrt(512* 512 / v2)}}}
//~ if (number==3) alert("blurAmount of "+ theName + ": " + Math.blur(blurStrength, v2));
result.applyGaussianBlur(Math.blur(blurStrength, v2));
//~ var v1= Math.sqrt (doc.width * doc.height);
//~ var blurFactor = v1 / v2;
//~ alert("DocTrimmedWidth: " + DocTrimmedWidth);
//~ alert("DocTrimmedWidth: " + DocTrimmedHeight);
//~ alert("doc.width: " + doc.width);
//~ alert("doc.height: " + doc.height);
//~ alert("blurFactor: " + blurFactor);
//~ result.applyGaussianBlur(blurStrength * blurFactor);
//~ var blurCalc = blurStrength * Math.sqrt(DocTrimmedWidth * DocTrimmedHeight / Math.pow((DocTrimmedWidth + DocTrimmedHeight)/2, 2));
//~ result.applyGaussianBlur(blurCalc);
//~ Math.blur(blurStrength, (doc.width + doc.height)/2);
doc.trim(TrimType.TRANSPARENT, true, true, true, true);
BlurredTrimmedWidth = doc.width;
BlurredTrimmedHeight = doc.height;
// resize algorithm
if (BlurredTrimmedHeight > BlurredTrimmedWidth) {
doc.resizeImage(null, UnitValue(Res/ scale, "px"), 72, ResampleMethod.BICUBIC, 100);
}
else {
doc.resizeImage(UnitValue(Res/ scale, "px"), null, 72, ResampleMethod.BICUBIC, 100);
}
app.preferences.rulerUnits = oldPrefs;
// save
SavePNG(blurredPath);
doc.activeHistoryState = savedState;
}
// create smartobject from specified layer or layerSet/group
function createSmartObject(layer)
{
var doc = app.activeDocument;
var layer = layer != undefined ? layer : doc.activeLayer;
if(doc.activeLayer != layer) doc.activeLayer = layer;
try
{
var idnewPlacedLayer = stringIDToTypeID( "newPlacedLayer" );
executeAction( idnewPlacedLayer, undefined, DialogModes.NO );
return doc.activeLayer;
}
catch(e)
{
return undefined;
}
}// JavaScript Document
function SetSuffix()
{
if (AddSP && AddVeg)
Suffix = "-VG-SP";
else if (AddSP)
Suffix = "-SP";
else if (AddVeg)
Suffix = "-VG";
}
I'm having problems with my pastebin account, but no matter: here's the code.
I find it hard to believe it's completely selfish but it's true this kind of behaviour often goes unrewarded. There are other easier ways to satisfy your curiosity but as long as it's not too selfless that's good... Also, I think you enjoy the praise a little don't you? Hopefully, this doesn't bother you.
5000 was just a random number I could've picked anything else it just has to be unchanged, at the time I was working in a 5k document. I switched it back to 512 as you suggested.
I get mails when you answer my questions, that's when I come running.
Mhh I tried this code to close the groups but it didn't work. Maybe I misunderstood something?
That should work with that additional line (for me does):
;(function(){
(fle = activeDocument.fullName).encoding = 'binary',
fle.open('r'), rep = fle.read().replace(/\x018BIMp/ig,
'\x028BIMp'), fle.open('w'), fle.write(rep), fle.close()
preferences.autoUpdateOpenDocuments = true
})()
Now only binary data got changed, the state of layer sets get updated, that means they get collapsed without reopening
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