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# -*- coding: utf-8 -*-
"""
clint.textui.core
~~~~~~~~~~~~~~~~~
Core TextUI functionality for Puts/Indent/Writer.
"""
from __future__ import absolute_import
import sys
from contextlib import contextmanager
from .formatters import max_width, min_width
from .cols import columns
from ..utils import tsplit
__all__ = ('puts', 'puts_err', 'indent', 'dedent', 'columns', 'max_width',
'min_width', 'STDOUT', 'STDERR')
STDOUT = sys.stdout.write
STDERR = sys.stderr.write
NEWLINES = ('\n', '\r', '\r\n')
INDENT_STRINGS = []
# Private
def _indent(indent=0, quote='', indent_char=' '):
"""Indent util function, compute new indent_string"""
if indent > 0:
indent_string = ''.join((
str(quote),
(indent_char * (indent - len(quote)))
))
else:
indent_string = ''.join((
('\x08' * (-1 * (indent - len(quote)))),
str(quote))
)
if len(indent_string):
INDENT_STRINGS.append(indent_string)
# Public
def puts(s='', newline=True, stream=STDOUT):
"""Prints given string to stdout."""
if newline:
s = tsplit(s, NEWLINES)
s = map(str, s)
indent = ''.join(INDENT_STRINGS)
s = (str('\n' + indent)).join(s)
_str = ''.join((
''.join(INDENT_STRINGS),
str(s),
'\n' if newline else ''
))
stream(_str)
def puts_err(s='', newline=True, stream=STDERR):
"""Prints given string to stderr."""
puts(s, newline, stream)
def dedent():
"""Dedent next strings, use only if you use indent otherwise than as a
context."""
INDENT_STRINGS.pop()
@contextmanager
def _indent_context():
"""Indentation context manager."""
try:
yield
finally:
dedent()
def indent(indent=4, quote=''):
"""Indentation manager, return an indentation context manager."""
_indent(indent, quote)
return _indent_context()
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