root/django/branches/gis/django/utils/termcolors.py

"""
termcolors.py
"""

color_names = ('black', 'red', 'green', 'yellow', 'blue', 'magenta', 'cyan', 'white')
foreground = dict([(color_names[x], '3%s' % x) for x in range(8)])
background = dict([(color_names[x], '4%s' % x) for x in range(8)])
del color_names

RESET = '0'
opt_dict = {'bold': '1', 'underscore': '4', 'blink': '5', 'reverse': '7', 'conceal': '8'}

def colorize(text='', opts=(), **kwargs):
    """
    Returns your text, enclosed in ANSI graphics codes.

    Depends on the keyword arguments 'fg' and 'bg', and the contents of
    the opts tuple/list.

    Returns the RESET code if no parameters are given.

    Valid colors:
        'black', 'red', 'green', 'yellow', 'blue', 'magenta', 'cyan', 'white'

    Valid options:
        'bold'
        'underscore'
        'blink'
        'reverse'
        'conceal'
        'noreset' - string will not be auto-terminated with the RESET code

    Examples:
        colorize('hello', fg='red', bg='blue', opts=('blink',))
        colorize()
        colorize('goodbye', opts=('underscore',))
        print colorize('first line', fg='red', opts=('noreset',))
        print 'this should be red too'
        print colorize('and so should this')
        print 'this should not be red'
    """
    text = str(text)
    code_list = []
    if text == '' and len(opts) == 1 and opts[0] == 'reset':
        return '\x1b[%sm' % RESET
    for k, v in kwargs.iteritems():
        if k == 'fg':
            code_list.append(foreground[v])
        elif k == 'bg':
            code_list.append(background[v])
    for o in opts:
        if o in opt_dict:
            code_list.append(opt_dict[o])
    if 'noreset' not in opts:
        text = text + '\x1b[%sm' % RESET
    return ('\x1b[%sm' % ';'.join(code_list)) + text

def make_style(opts=(), **kwargs):
    """
    Returns a function with default parameters for colorize()

    Example:
        bold_red = make_style(opts=('bold',), fg='red')
        print bold_red('hello')
        KEYWORD = make_style(fg='yellow')
        COMMENT = make_style(fg='blue', opts=('bold',))
    """
    return lambda text: colorize(text, opts, **kwargs)