#!/usr/bin/python

import pyatspi
import sys

def magnifyAccessible(event, obj=None, extents=None):
    if event.source and event.source.getRole() == pyatspi.ROLE_TERMINAL: # protection against parasite events from terminals
        return

    if event.type.startswith("object:state-changed") and not event.detail1:
        # This object just became unselected or unfocused, and we're not
        # big on nostalgia.
        return

    obj = obj or event.source

    x, y, width, height = -1,-1,-1,-1
    if event and event.type.startswith("object:text-caret-moved"):
        try:
            text = obj.queryText()
            if text and (text.caretOffset >= 0):
                offset = text.caretOffset
                if offset == text.characterCount:
                    offset -= 1
                [x, y, width, height] = text.getCharacterExtents(offset, 0)
        except:
            pass

        print "position: %i,%i size %i:%s" %(x, y, width, height)

def startTracking():
    pyatspi.Registry.registerEventListener(magnifyAccessible, "object:text-caret-moved")

def stopTracking():
    pyatspi.Registry.deregisterEventListener(magnifyAccessible, "object:text-caret-moved")

def main():
    startTracking()
    pyatspi.Registry.start()
    return 0

if __name__ == "__main__":
    sys.exit(main())