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This example will select a random line from a text file.

The code assumes that there is a text file on the Desktop called poem.txt

If a document is not open a new document will be created.

The random line of text will be put on a new text  layer.

[code]

#target photoshop

function main(){

var txtFile = File(Folder.desktop + "/poem.txt"); //text file to get a line from

if(!txtFile.exists){

    alert("Cann't find Poem.txt on the desktop!");

    return;

    }

txtFile.open('r'); //open the text file

var  data = txtFile.read(); // read all the text file into a var

txtFile.close(); // close the text file

data = data.split('\n'); //create an array with all lines from the text file

var randomLine='';

while (randomLine.length < 3){ //make sure it is not a blank line

randomLine = randomData();

}

///////////////// ok now have a random line /////////

if(!documents.length){ //create a new document if one is not open

app.documents.add(new UnitValue( 800, 'px' ), new UnitValue( 600, 'px' ), 72, "Random Test");

}

var Percent = 90;  //length of text to width of document

var Black = new SolidColor();

Black.rgb.hexValue = '000000'; //set colour of text

var newTextLayer = activeDocument.artLayers.add(); //add a new layer

newTextLayer.kind = LayerKind.TEXT;

newTextLayer.textItem.kind = TextType.POINTTEXT;

newTextLayer.textItem.color = Black;

newTextLayer.textItem.font = "Georgia"; //font name (must be the postscript name)

newTextLayer.textItem.size = 10;

newTextLayer.textItem.contents = randomLine; //this will be the random line

var startRulerUnits = app.preferences.rulerUnits;

app.preferences.rulerUnits = Units.PIXELS; // set units to pixels

var doc = activeDocument; //make a referance to the open document

var LB = doc.activeLayer.bounds; //get the layer bounds

var docHeight = doc.height; //doc height

var docWidth = doc.width; //doc width

var LWidth = Math.abs(LB[2].value) - Math.abs(LB[0].value);   

var percentageWidth = ((docWidth/LWidth)*Percent);

doc.activeLayer.resize(percentageWidth,percentageWidth,AnchorPosition.MIDDLECENTER); //resize text

align('AdCH'); align('AdCV'); //center the text Horizontal and vertical

function randomData(){

var randomDat =data[Math.round (Math.random()* (data.length - 1))];

return randomDat;

}

}

main();

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();

};

[/code]