; AutoHotkey script: http://www.autohotkey.com/
; Prevent the Screen Saver from engaging
; by periodically moving the mouse left and right by one pixel.
;
; Example:
;    "C:\Program Files\AutoHotkey\AutoHotkey.exe" mousey.ahk
;    "C:\Program Files\AutoHotkey\AutoHotkey.exe" mousey.ahk 10

;; could we infer a default interval by looking in the registry?
;RegRead ssto, HKEY_CURRENT_USER, "Control Panel\Desktop\ScreenSaveTimeOut"
;MsgBox ssto=%ssto%


pixelDelta := 1

; default
intervalMinutes := 5

; validate # of args
if 0 > 1
{
  MsgBox Usage: mousey [interval-in-minutes]
  ExitApp
}

; get interval arg (ie, "Loop %0%" iterates once)
Loop %0%
{
  intervalMinutes := %A_Index%
}
;MsgBox %intervalMinutes%

; validate interval arg
if intervalMinutes is not number
{
  MsgBox mousey: invalid interval argument "%intervalMinutes%", a number is required
  ExitApp
}

intervalMilli := intervalMinutes * 60 * 1000
;MsgBox intervalMilli=%intervalMilli%
;ExitApp

Loop:
Sleep %intervalMilli%

MouseGetPos x, y
x := x + pixelDelta
MouseMove %x%, %y%

pixelDelta := -pixelDelta

Goto Loop