EDOBE XDOM TPC Technical Information download pdf (Page 47)

CHAPTER 5: Scripting with JavaScript Accessing and referencing objects 47

The following statements assign the name of the first graphic style in the collection to a variable. You can

use these statements interchangeably.

var styleName = myStyles[0].name

var styleName = firstStyle.name

var styleName = app.activeDocument.graphicStyles[0].name

To get the total number of objects in a collection, use the length property:

alert ( myStyles.length );

The index of the last graphic style in the collection is myStyles.length-1 (-1 because the collection

starts the index count at 0 and the

length property counts from 1):

var lastStyle = myStyles[ myStyles.length - 1 ];

Note that an expression representing the index value is enclosed in square brackets ([]) as well as quotes.

If you know the name of an object, you can access the object in the collections using the name surrounded

by square brackets; for example:

var getStyle = myStyles[?Ice Type?];

Each element in the collection is an object of the desired type, and you can access its properties through

the collection. For example, to get an object’s name, use the

name property:

var styleName = app.activeDocument.graphicStyles[0].name;

To apply lastStyle to the first pageItem in the document, use its applyTo() method:

lastStyle.applyTo( app.activeDocument.pageItems[0] );

Creating new objects

You can use a script to create new objects. To create objects that are available from collection objects, or

containers, use the container object’s

add() method:

var myDoc = app.documents.add()

var myLayer = myDoc.layers.add()

Some object types are not available from containers. To create an object of this type, define a variable,

then use the

new operator with an object constructor to assign an object as the value. For example, to

create a new

CMYKColor object using the variable name myColor:

var myColor = new CMYKColor()

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EDOBE XDOM TPC Technical Information Page 47