Can a script read/write to the zoom percentage field? (my Fit on Screen issues)

Question

When I was previously very active in PS, a few versions back under Win 7, Fit on Screen did not literally fill the screen, which I liked much better.

I feel there's three downsides to the current one...

(1) You always have a sense there just might be more of your picture past the boundaries of your viewport. I tend to wanna make sure there isn't.

(2) It can be finicky to start drawing a crop or marquee at one of the corners (possibly also depending if you have the "magnetic" options active or not).

(3) To me, it just doesn't look as neat or reassuring.

Upside: It now does what it says (very literally).

I just noticed that the behavior of which I'm speaking is still available in the toolbar of the Hand Tool, but this one doesn't seem to record to an action.

I could probably record the current behavior and add a "zoom down" step, but depending on size this can often create too much of a border.

Now if a script can read/write to the zoom percentage field, I can simply Fit on Screen, then deduct 2 or 3% from the zoom percentage.

Or does Adobe happen to have a script for the current behavior I like on the Hand toolbar...? An option in Preferences would be nice too.

This is the one I like, but I never use the Hand Tool... As you can see, it creates a handy margin, whereas the recordable one from the menu takes up all available space.

Stephen Marsh · Accepted Answer

Try this mashup. You may only need line 2?

Change the - 2 for + 2 to enlarge 2% or whatever the desired value is:

// Fit on screen
app.runMenuItem(stringIDToTypeID('fitOnScreen'));
// Round to integer
var roundedZoom = parseInt(getActiveDocumentZoom());
// Reduce magnification -2%
setZoom(roundedZoom - 2);

// From mike hale
function getActiveDocumentZoom(){
   var ref;
   ref = new ActionReference();
   ref.putProperty( charIDToTypeID( "Prpr" ),charIDToTypeID('Zm  '));
   ref.putEnumerated(charIDToTypeID('Dcmn'), charIDToTypeID( "Ordn" ), charIDToTypeID( "Trgt" ) );
   return (executeActionGet(ref).getUnitDoubleValue (charIDToTypeID('Zm  ')))*100;
};

// From xbytor
function setZoom(zoom) { 
   cTID = function (s) {
      return app.charIDToTypeID(s);
   };
   var docRes = activeDocument.resolution;
   activeDocument.resizeImage(undefined, undefined, 72 / (zoom / 100), ResampleMethod.NONE);
   var desc = new ActionDescriptor();
   var ref = new ActionReference();
   ref.putEnumerated(cTID("Mn  "), cTID("MnIt"), cTID('PrnS'));
   desc.putReference(cTID("null"), ref);
   executeAction(cTID("slct"), desc, DialogModes.NO);
   activeDocument.resizeImage(undefined, undefined, docRes, ResampleMethod.NONE);
}

P.S. You can also insert the menu item command for Fit On Screen into an action.

c.pfaffenbichler · Answer

I am not sure I understand, Fit on Screen does not result in the image »touching« the screen’s edges for me.

Could you please post a COMPLETE screenshot of before and after applying View > Fit on Screen?

As for Scripting there is one from a previous long-time contributer that might meet your intentions:

// by mike hale;
#target photoshop
alert (getActiveDocumentZoom());
function getActiveDocumentZoom(){
   var ref;
   ref = new ActionReference();
   ref.putProperty( charIDToTypeID( "Prpr" ),charIDToTypeID('Zm  '));
   ref.putEnumerated(charIDToTypeID('Dcmn'), charIDToTypeID( "Ordn" ), charIDToTypeID( "Trgt" ) );
   return (executeActionGet(ref).getUnitDoubleValue (charIDToTypeID('Zm  ')))*100;
};
function setZoomToNearestStandardZoom( zoomPercent ){
    var currentZoom;
    currentZoom = getActiveDocumentZoom();
    while( currentZoom > zoomPercent ){
        app.runMenuItem(charIDToTypeID('ZmOt'));
        currentZoom = getActiveDocumentZoom();
    }
    while( currentZoom < zoomPercent ){
        app.runMenuItem(charIDToTypeID('ZmIn'));
        currentZoom = getActiveDocumentZoom();
    }
}
setZoomToNearestStandardZoom(50);

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