Script to crop (no delete pixel) snap to ruler guide

Question

Hi everyone,
I manually make 1 ruler guide and automatically create 3 ruler guides. These 4 ruler guide form a rectangular.
Could I have a script that crop my image (no delete pixel) to fit that rectangular formed by the 4 guides .
Thank you in advance for your help!

Answer 1

I had a fight scripting it. Strange thing were happing when I was testing. There seems to be a bug in scripting in cs6 -> CC 2014. Re-size layer seems to back up a history step. undoing the last step.  When I was using suspend history states I was loosing the last guide I set or the layer mask from my last test that I deleted the mask was restored and the script would fail.
http://www.mouseprints.net/old/dpr/FitImageToGuides.jsx
/* ==========================================================
// 2014  John J. McAssey (JJMack)
// ======================================================= */
// This script is supplied as is. It is provided as freeware.
// The author accepts no liability for any problems arising from its use.
/* Help Category note tag menu can be used to place script in automate menu
<javascriptresource>
<about>$$$/JavaScripts/FitImageToGuides/About=JJMack's FitImageToGuides .^r^rCopyright 2014 Mouseprints.^r^rFour and only four guides are required</about>
<category>JJMack's Script</category>
</javascriptresource>
// enable double-clicking from Mac Finder or Windows Explorer
#target photoshop // this command only works in Photoshop CS2 and higher
// bring application forward for double-click events
app.bringToFront();
// ensure at least one document open
if (!documents.length) alert('There are no documents open.', 'No Document');
else {
  // declare Global variables
  main(); // at least one document exists proceed
  //app.activeDocument.suspendHistory('Fix Image to Guides','main()');  // seems to be a problem layer is resize Photoshop back up a history step ?
//                            main function                                  //
function main() {
  // declare local variables
  var orig_ruler_units = app.preferences.rulerUnits;
  var orig_type_units = app.preferences.typeUnits;
  var orig_display_dialogs = app.displayDialogs;
  app.preferences.rulerUnits = Units.PIXELS; // Set the ruler units to PIXELS
  app.preferences.typeUnits = TypeUnits.POINTS;   // Set Type units to POINTS
  app.displayDialogs = DialogModes.NO; // Set Dialogs off
  try { code(); }
  // display error message if something goes wrong
  catch(e) { alert(e + ': on line ' + e.line, 'Script Error', true); }
  app.displayDialogs = orig_display_dialogs; // Reset display dialogs
  app.preferences.typeUnits  = orig_type_units; // Reset ruler units to original settings
  app.preferences.rulerUnits = orig_ruler_units; // Reset units to original settings
//                           main function end                               //
// The real code is embedded into this function so that at any point it can return //
// to the main line function to let it restore users edit environment and end      //
function code() {
  if (app.activeDocument.guides.length != 4) { alert("Four and only four Guides are required"); return; } // quit
  // get guides;
  var theVert = new Array;
  var theHor = new Array;
  for (var m = 0; m < app.activeDocument.guides.length; m++) {
  if (app.activeDocument.guides[m].direction == Direction.HORIZONTAL) {theVert.push(app.activeDocument.guides[m].coordinate)}
  else {theHor.push(app.activeDocument.guides[m].coordinate)}
  if (theHor.length != 2 || theVert.length != 2) { alert("Four Guides two vertical and two horizontal are required"); return; } // quit
  getTarget=getSelectedLayersIdx();
  if (getTarget.length!=1){ alert("The number of layers targeted is " + getTarget.length ); return; } // quit
  if (app.activeDocument.activeLayer.isBackgroundLayer ) { alert("Can not resize the background layer"); return; } // quit
  if (!app.activeDocument.activeLayer.visible ) { alert("Active layer is  not visible"); return; } // quit
  //if (hasLayerMask()) { alert("Active layer is  Masked"); return; } // quit
  if (app.activeDocument.activeLayer.kind == LayerKind.NORMAL  || app.activeDocument.activeLayer.kind == LayerKind.SMARTOBJECT && hasLayerMask()) { deleteLayerMask ();}
  if (app.activeDocument.activeLayer.kind != LayerKind.NORMAL  && app.activeDocument.activeLayer.kind != LayerKind.SMARTOBJECT )  {
  alert("Active layer is " + app.activeDocument.activeLayer.kind); return; } // quit
  // set selection to the ared defined but the guide lines the selectiom may get undone bt the bug in .resize() backing up a steo in histoty ???
  app.activeDocument.selection.select([[theHor[0], theVert[0]], [theHor[1], theVert[0]], [theHor[1], theVert[1]], [theHor[0], theVert[1]]]);
  // resize current normal layer or smart object layer to just cover selection canvas area aspect ratio and size and mask off any overflow
  var SB = app.activeDocument.selection.bounds; // Get selection bounds
  var SWidth = (SB[2].value) - (SB[0].value); // Area width
  var SHeight = (SB[3].value) - (SB[1].value); // Area height
  var LB = app.activeDocument.activeLayer.bounds; // Get Active layers bounds
  var LWidth = (LB[2].value) - (LB[0].value); // Area width
  var LHeight = (LB[3].value) - (LB[1].value); // Area height
  var userResampleMethod = app.preferences.interpolation; // Save interpolation settings
  app.preferences.interpolation = ResampleMethod.BICUBIC; // resample interpolation bicubic
  try {
  if (LWidth/LHeight<SWidth/SHeight) { // layer's Aspect Ratio less the Canvas area Aspect Ratio
  var percentageChange = ((SWidth/LWidth)*100); // Resize to canvas area width
  app.activeDocument.activeLayer.resize(percentageChange,percentageChange,AnchorPosition.MIDDLECENTER);
  else {
  var percentageChange = ((SHeight/LHeight)*100); // resize to canvas area height
  app.activeDocument.activeLayer.resize(percentageChange,percentageChange,AnchorPosition.MIDDLECENTER);
  catch(e) {
  app.preferences.interpolation = userResampleMethod; // Reset interpolation setting
  selectFront(); // Photoshop make top layer current when none are targeted
  code(); // Retry  with top visible layer selected targeted
  return; // rest would have been done during the retry
  app.preferences.interpolation = userResampleMethod; // Reset interpolation setting
  // Seems to be a bug in  resize() the document seems to first be backed up a step in history
  app.activeDocument.selection.select([[theHor[0], theVert[0]], [theHor[1], theVert[0]], [theHor[1], theVert[1]], [theHor[0], theVert[1]]]); // redo the selection
  align('AdCH'); // align to horizontal center
  align('AdCV'); // align to vertical center
  addLayermask(); // add layer mask
// Helper Functions
function align(method) {
  var desc = new ActionDescriptor();
  var ref = new ActionReference();
  ref.putEnumerated( charIDToTypeID( "Lyr " ), charIDToTypeID( "Ordn" ), charIDToTypeID( "Trgt" ) );
  desc.putReference( charIDToTypeID( "null" ), ref );
  desc.putEnumerated( charIDToTypeID( "Usng" ), charIDToTypeID( "ADSt" ), charIDToTypeID( method ) );
  try{executeAction( charIDToTypeID( "Algn" ), desc, DialogModes.NO );}
  catch(e){}
// Function: hasLayerMask
// Usage: see if there is a raster layer mask
// Input: <none> Must have an open document
// Return: true if there is a vector mask
function hasLayerMask() {
  var hasLayerMask = false;
  try {
  var ref = new ActionReference();
  var keyUserMaskEnabled = app.charIDToTypeID( 'UsrM' );
  ref.putProperty( app.charIDToTypeID( 'Prpr' ), keyUserMaskEnabled );
  ref.putEnumerated( app.charIDToTypeID( 'Lyr ' ), app.charIDToTypeID( 'Ordn' ), app.charIDToTypeID( 'Trgt' ) );
  var desc = executeActionGet( ref );
  if ( desc.hasKey( keyUserMaskEnabled ) ) { hasLayerMask = true; }
  catch(e) { hasLayerMask = false; }
  return hasLayerMask;
function getSelectedLayersIdx(){
      var selectedLayers = new Array;
      var ref = new ActionReference();
      ref.putEnumerated( charIDToTypeID("Dcmn"), charIDToTypeID("Ordn"), charIDToTypeID("Trgt") );
      var desc = executeActionGet(ref);
      if( desc.hasKey( stringIDToTypeID( 'targetLayers' ) ) ){
         desc = desc.getList( stringIDToTypeID( 'targetLayers' ));
          var c = desc.count
          var selectedLayers = new Array();
          for(var i=0;i<c;i++){
            try{
               activeDocument.backgroundLayer;
               selectedLayers.push(  desc.getReference( i ).getIndex() );
            }catch(e){
               selectedLayers.push(  desc.getReference( i ).getIndex()+1 );
       }else{
         var ref = new ActionReference();
         ref.putProperty( charIDToTypeID("Prpr") , charIDToTypeID( "ItmI" ));
         ref.putEnumerated( charIDToTypeID("Lyr "), charIDToTypeID("Ordn"), charIDToTypeID("Trgt") );
         try{
            activeDocument.backgroundLayer;
            selectedLayers.push( executeActionGet(ref).getInteger(charIDToTypeID( "ItmI" ))-1);
         }catch(e){
            selectedLayers.push( executeActionGet(ref).getInteger(charIDToTypeID( "ItmI" )));
      return selectedLayers;
function selectFront() {
// Alt+. shortcut select ftont visible layer
var idslct = charIDToTypeID( "slct" );
    var desc250 = new ActionDescriptor();
    var idnull = charIDToTypeID( "null" );
        var ref207 = new ActionReference();
        var idLyr = charIDToTypeID( "Lyr " );
        var idOrdn = charIDToTypeID( "Ordn" );
        var idFrnt = charIDToTypeID( "Frnt" );
        ref207.putEnumerated( idLyr, idOrdn, idFrnt );
    desc250.putReference( idnull, ref207 );
    var idMkVs = charIDToTypeID( "MkVs" );
    desc250.putBoolean( idMkVs, false );
executeAction( idslct, desc250, DialogModes.NO );
function deleteLayerMask (apply) {
// Delet Layer mask default to not apply first
if (apply == undefined) {var apply = false};
try {
var idDlt = charIDToTypeID( "Dlt " );
    var desc9 = new ActionDescriptor();
    var idnull = charIDToTypeID( "null" );
        var ref5 = new ActionReference();
        var idChnl = charIDToTypeID( "Chnl" );
        var idChnl = charIDToTypeID( "Chnl" );
        var idMsk = charIDToTypeID( "Msk " );
        ref5.putEnumerated( idChnl, idChnl, idMsk );
    desc9.putReference( idnull, ref5 );
    var idAply = charIDToTypeID( "Aply" );
    desc9.putBoolean( idAply, apply );
executeAction( idDlt, desc9, DialogModes.NO );
catch (e) {}
function addLayermask(){
// Add layer Mask
var idMk = charIDToTypeID( "Mk  " );
    var desc52 = new ActionDescriptor();
    var idNw = charIDToTypeID( "Nw  " );
    var idChnl = charIDToTypeID( "Chnl" );
    desc52.putClass( idNw, idChnl );
    var idAt = charIDToTypeID( "At  " );
        var ref19 = new ActionReference();
        var idChnl = charIDToTypeID( "Chnl" );
        var idChnl = charIDToTypeID( "Chnl" );
        var idMsk = charIDToTypeID( "Msk " );
        ref19.putEnumerated( idChnl, idChnl, idMsk );
    desc52.putReference( idAt, ref19 );
    var idUsng = charIDToTypeID( "Usng" );
    var idUsrM = charIDToTypeID( "UsrM" );
    var idRvlS = charIDToTypeID( "RvlS" );
    desc52.putEnumerated( idUsng, idUsrM, idRvlS );
executeAction( idMk, desc52, DialogModes.NO );
// Un link layer mask just added fron the layers content
var idsetd = charIDToTypeID( "setd" );
    var desc2 = new ActionDescriptor();
    var idnull = charIDToTypeID( "null" );
        var ref1 = new ActionReference();
        var idLyr = charIDToTypeID( "Lyr " );
        var idOrdn = charIDToTypeID( "Ordn" );
        var idTrgt = charIDToTypeID( "Trgt" );
        ref1.putEnumerated( idLyr, idOrdn, idTrgt );
    desc2.putReference( idnull, ref1 );
    var idT = charIDToTypeID( "T   " );
        var desc3 = new ActionDescriptor();
        var idUsrs = charIDToTypeID( "Usrs" );
        desc3.putBoolean( idUsrs, false );
    var idLyr = charIDToTypeID( "Lyr " );
    desc2.putObject( idT, idLyr, desc3 );
executeAction( idsetd, desc2, DialogModes.NO );