1 Correct answer
Try this:
var dx = 9, u = 'pt';
Object.prototype.offsetX = function()
{
if (this.parent.constructor != Page) return;
var sgn = 1 - 2*(this.parent.documentOffset%2);
this.move(undefined,['' + sgn*dx + u,0]);
}
var items = app.activeDocument.pageItems.everyItem().getElements();
var obj;
while(obj=items.pop()) obj.offsetX();
Marc
18
Replies
From the OMV:
void move ([to: {Array of 2 Units | Spread | Page | Layer} ][, by: Array of Measurement Unit
(Number or String)=any])
As you can see, Marc sets the first argument (to) to undefined, and the 2nd to the distance, in an array of 2 units.
The sign stuff is needed in case the zero point of your document is inbetween spreads (and what a dirty trick this is, I'm tempted to copy it as my own! 
). On left pages it will be -1, on right pages +1.
The variable dx is a global value (Marc: would it be possible to put this in the declaration, as "function( dx, dy)"?). The second value in the array is set to 0, and that's where you would put the y distance. The y distance does not need any special sign handling as it always will move down with a positive value.
[Jongware] wrote:
Marc: would it be possible to put this in the declaration, as "function( dx, dy)"?
Of course it would 
var unit = 'pt';
Object.prototype.offsetXY = function(/*int*/dx, /*int*/dy)
{
if (this.parent.constructor != Page) return;
var sgn = 1 - 2*(this.parent.documentOffset%2);
this.move(undefined,['' + sgn*dx + u, '' + dy + unit]);
}
var items = app.activeDocument.pageItems.everyItem().getElements();
var obj;
while(obj=items.pop()) obj.offsetXY(9,9); // dx = +/-9, dy = +9
The code could/should be improved in various ways. I don't like global variables, too.
@+
Marc
I agree -- it's not the hot trick I thought it was. No prob, there are lots of ways to skin a cat. 
Since the object's immediate parent should be a Page, you could check for (obj.parent.index) & 1 -- it'll be 0 for even pages, 1 for odds.
[Add] And because of my C background, I would use this
sign = (obj.parent.index) & 1 ? 1 : -1;
which, honestly!, isn't produced by pressing random keys 😛
Did I miss something?
Eh. From the OMV:
"The index of the Page within its containing object." Actually, I was assuming this would be the index of the page in the document? I never thought a Page parent could be a Spread (and yes, the OMV tells me it is a Spread).
(1 min later) Okay, you are so right about this. This script
alert (app.activeDocument.layoutWindows[0].activePage.index);
shows nothing but 0 and 1. And that's for a regular document -- I imagine I'd get higher values for those combined to side-by-sides by dragging in the pages panel.
I'm pretty sure I used it at least once my way, but then again -- hey, it works (for a normal book).
Let's not confuse poor Thiyagu any further 
[Jongware] wrote:
(...)
Actually, I was assuming this would be the index of the page in the document? I never thought a Page parent could be a Spread (and yes, the OMV tells me it is a Spread).(...)
Long ago, I made diagrams to understand this kind of relationships:
This needs to be updated, but it remains useful as an overview.
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