take screenshot and save it

takeScreenshotAndSaveIt.py

import Quartz
import AppKit
import os.path

from mojo.UI import CurrentSpaceCenterWindow

# get a path for a png file next to the ufo
path_base = os.path.splitext(CurrentFont().path)[0]
path = path_base + ".png"

# get the space center window
sp = CurrentSpaceCenterWindow()
# get the cocoa window object
w = sp.window().getNSWindow()
# get the window number
windowNumber = w.windowNumber()

# get the screenshot
screenshot = Quartz.CGWindowListCreateImage(
    Quartz.CGRectNull, # use Quartz.CGRectInfinite for a full screenshot
    Quartz.kCGWindowListOptionIncludingWindow, 
    windowNumber, 
    Quartz.kCGWindowImageShouldBeOpaque)
# convert it to a CIIimage
result = AppKit.CIImage.imageWithCGImage_(screenshot)
# create a represenation 
rep = AppKit.NSBitmapImageRep.alloc().initWithCIImage_(result)
# get the bitmap data
PNGData = rep.representationUsingType_properties_(AppKit.NSPNGFileType, None)
# save it to disk
PNGData.writeToFile_atomically_(path, False)