root/trunk/RBFoundation/RBFoundation/XMLUtilityFunctions.py

#!/usr/bin/env python
##~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
##~ License 
##~ 
##- The RuneBlade Foundation library is intended to ease some 
##- aspects of writing intricate Jabber, XML, and User Interface (wxPython, etc.) 
##- applications, while providing the flexibility to modularly change the 
##- architecture. Enjoy.
##~ 
##~ Copyright (C) 2002  TechGame Networks, LLC.
##~ 
##~ This library is free software; you can redistribute it and/or
##~ modify it under the terms of the BSD style License as found in the 
##~ LICENSE file included with this distribution.
##~ 
##~ TechGame Networks, LLC can be reached at:
##~ 3578 E. Hartsel Drive #211
##~ Colorado Springs, Colorado, USA, 80920
##~
##~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#~ Imports 
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

import re

#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#~ Constants / Variables / Etc. 
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

colorlookuptable = {
    'none': None,

    'black': (0x00, 0x00, 0x00), 'gray': (0x80, 0x80, 0x80), 
    'silver': (0xc0, 0xc0, 0xc0), 'white': (0xff, 0xff, 0xff),

    'blue': (0x00, 0x00, 0xff), 'lime': (0x00, 0xff, 0x00), 'red': (0xff, 0x00, 0x00),
    'navy': (0x00, 0x00, 0x80), 'green': (0x00, 0x80, 0x00), 'maroon': (0x80, 0x00, 0x00),

    'teal': (0x00, 0x80, 0x80), 'aqua': (0x00, 0xff, 0xff),
    'purple': (0x80, 0x00, 0x80), 'fuchsia': (0xff, 0x00, 0xff),
    'olive': (0x80, 0x80, 0x00), 'yellow': (0xff, 0xff, 0x00),
    }

import re
recolorhex6 = re.compile('#([0-9a-fA-F]{2})([0-9a-fA-F]{2})([0-9a-fA-F]{2})')
recolorhex3 = re.compile('#([0-9a-fA-F])([0-9a-fA-F])([0-9a-fA-F])')
recolorfn = re.compile('rgb\(([0-9.]+),\s*([0-9.]+),\s*([0-9.]+),{0,1}\s*\)')

#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#~ Definitions 
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

def RGBToColorString(r, g, b):
    return "#%2x%2x%2x" % (r, g, b)

def ColorStringToRGB(colorstr):
    """
    Valid color strings:
        "none"
        "black" # color string constant lookup
        "#ff0088"
        "#f08" # expanded to #ff0088
        "rgb(255, 0, 136)"
        "rgb(1.0, 0.0, 0.53125)"
    """
    try: return colorlookuptable[colorstr.lower()]
    except KeyError: pass

    try: r, g, b = [int(x, 0x10) for x in recolorhex6.split(colorstr)[1:-1]]
    except ValueError: pass # Unpack tuple of wrong size
    else: return r, g, b

    try: r, g, b = [int(x, 0x10) for x in recolorhex3.split(colorstr)[1:-1]]
    except ValueError: pass # Unpack tuple of wrong size
    else: return r*0x11, g*0x11, b*0x11

    try: r, g, b = [float(x) for x in recolorfn.split(colorstr)[1:-1]]
    except ValueError: pass # Unpack tuple of wrong size
    else:
        if 0<r<1 or 0<g<1 or 0<b<1:
            return r*255, g*255, b*255
        else:
            return r, g, b

    raise ValueError, "Could not interpret color value %r" % (colorstr, )