Can you specify the background color when resizing the canvas?

Question

I haven't found this in the Scripting Reference.
In the "Canvas Size…" dialog box you can specify the "Canvas Extension Color" to "Foreground", Background", "White", "Black", "Grey" or "Other…".
Can this be scripted?
I am writing an AppleScript to resize my canvas in order to add a slug to the bottom of the image. Currently my script stores the background color, so I can change it to White to accomplish my goal without discarding the background color (which gets restores at the end of the script). The problem is that if the user has a custom color (i.e. Pantone color) as the background color, the color does not get stored.

Answer 1

See if this works for you… Just some very basic AppleScript with a call to 'do javascript' in this case the variable 'Solid_Fill' this is a cleaned up piece of scriptlistener output (done very nicely by X's tools you will see a post below to the latest release of this) The scriptlistener output has been turned into a function that javascript can call. Inside of the function call I have put a list arguments passed from AppleScript. So the values 0, 0, 0, 0 in the AppleScript list end up as arguments passed to the functions C, M, Y, K variables. AppleScript objects are 1 based Javascript are 0 based & values the same.
set Solid_Fill to "function solidFillCMYK(C, M, Y, K) {
function cTID(s) { return app.charIDToTypeID(s); };
function sTID(s) { return app.stringIDToTypeID(s); };
var desc8 = new ActionDescriptor();
var ref4 = new ActionReference();
ref4.putClass( sTID('contentLayer') );
desc8.putReference( cTID('null'), ref4 );
var desc9 = new ActionDescriptor();
var desc10 = new ActionDescriptor();
var desc11 = new ActionDescriptor();
desc11.putDouble( cTID('Cyn '), C );
desc11.putDouble( cTID('Mgnt'), M );
desc11.putDouble( cTID('Ylw '), Y );
desc11.putDouble( cTID('Blck'), K );
desc10.putObject( cTID('Clr '), cTID('CMYC'), desc11 );
desc9.putObject( cTID('Type'), sTID('solidColorLayer'), desc10 );
desc8.putObject( cTID('Usng'), sTID('contentLayer'), desc9 );
executeAction( cTID('Mk  '), desc8, DialogModes.NO );
}; solidFillCMYK(arguments[0], arguments[1], arguments[2], arguments[3]);"
tell application "Adobe Photoshop CS2"
activate
set User_Rulers to ruler units of settings
set ruler units of settings to pixel units
set Doc_Ref to the current document
tell Doc_Ref
set background layer of last layer to false
do javascript Solid_Fill with arguments {0, 0, 0, 0} show debugger on runtime error
move first layer to end
set Doc_Height to height
-- set Doc_Width to width did NOT need this
resize canvas height Doc_Height + 200 anchor position top center
flatten
end tell
set ruler units of settings to User_Rulers
end tell