resize width of layer to canvas width

Question

I'm having some trouble resizing a layer width to canvas width.

I know one way that works and it involves creating new document, resizing, then pasting back in. This seems extranious it seems there should be an easier way.


    var width = doc.width;
    var bounds = layer.bounds;
    var height = bounds[3]-bounds[1]; \\get height because I want this the same
    var width = doc.width;
    layer.resize (width, height, AnchorPosition.MIDDLECENTER);

this seems to fail even though it seems the documentation says it should work? maybe I am misunderstanding.

Paul Riggott · Answer

When dealing with layers the resize is done with percentage, so your

layer width and height are allways 100% To make it fit the document you need to work out the ratio and then resize.

This should do what you want....

main();
function main(){
    if(!documents.length) return;    
    if (activeDocument.activeLayer.isBackgroundLayer) return;
    fitLayerToDoc();
}
function fitLayerToDoc(){   
var strtRulerUnits = app.preferences.rulerUnits; 
var strtTypeUnits = app.preferences.typeUnits; 
app.preferences.rulerUnits = Units.PIXELS; 
app.preferences.typeUnits = TypeUnits.PIXELS;            
var docWidth = activeDocument.width.value; 
var LB = activeDocument.activeLayer.bounds;               
var LWidth = LB[2].value - LB[0].value;                
var percentageWidth = ((docWidth/LWidth)*100); 
activeDocument.activeLayer.resize(percentageWidth,100,AnchorPosition.MIDDLECENTER);
align( 'AdRg');
app.preferences.rulerUnits = strtRulerUnits; 
app.preferences.typeUnits = strtTypeUnits;
}
function align(method) { 
activeDocument.selection.selectAll();
   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){}
   activeDocument.selection.deselect();
};

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