Manipuate JaxoDraw2 xml files.

jaxmanip.py

#!/usr/bin/python

from xml.etree.ElementTree import *
from optparse import OptionParser

def get_xypoints(node):
    xpoints = []
    ypoints = []
    for e in node.findall(".//void[@class='java.awt.Point'][@method='getField']"):
        e_name = e.find("string")
        if e_name is None or e_name.text not in ("x", "y"):
            continue
        e_set = e.find("void[@method='set']")
        if e_set is None:
            continue
        e_int = e_set.find("int")
        if e_int is None:
            continue
        if e_name.text == "x":
            xpoints.append(e_int)
        else:
            ypoints.append(e_int)
    return (tuple(xpoints), tuple(ypoints))

def process_file(filename, commands):
    tree = parse(filename)
    root = tree.getroot()

    xmin =  999999
    xmax = -999999
    ymin =  999999
    ymax = -999999

    xypoints = get_xypoints(root)
    for ex in xypoints[0]:
        x = int(ex.text)
        if xmin > x:
            xmin = x
        elif xmax < x:
            xmax = x
    for ey in xypoints[1]:
        y = int(ey.text)
        if ymin > y:
            ymin = y
        elif ymax < y:
            ymax = y

    if xmin <= xmax and ymin <= ymax:
        for cmd in commands:
            if cmd == "xflip":
                for ex in xypoints[0]:
                    x = int(ex.text)
                    x = xmax - (x - xmin)
                    ex.text = str(x)
            if cmd == "yflip":
                for ey in xypoints[1]:
                    y = int(ey.text)
                    y = ymax - (y - ymin)
                    ey.text = str(y)

    tree.write(filename, "UTF-8")

opt_parser = OptionParser(usage="Usage: %prog [options] files...")
opt_parser.add_option("--xflip", action="append_const", const="xflip", dest="commands", help="flip horizontally")
opt_parser.add_option("--yflip", action="append_const", const="yflip", dest="commands", help="flip vertically")
(opts, args) = opt_parser.parse_args()

for f in args:
    process_file(f, opts.commands)