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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 .formatters import max_width, min_width
from .cols import columns
from ..utils import tsplit
__all__ = ('puts', 'puts_err', 'indent', 'columns', 'max_width', 'min_width')
STDOUT = sys.stdout.write
STDERR = sys.stderr.write
NEWLINES = ('\n', '\r', '\r\n')
class Writer(object):
"""WriterUtilized by context managers."""
shared = dict(indent_level=0, indent_strings=[])
def __init__(self, indent=0, quote='', indent_char=' '):
self.indent = indent
self.indent_char = indent_char
self.indent_quote = quote
if self.indent > 0:
self.indent_string = ''.join((
str(quote),
(self.indent_char * (indent - len(self.indent_quote)))
))
else:
self.indent_string = ''.join((
('\x08' * (-1 * (indent - len(self.indent_quote)))),
str(quote))
)
if len(self.indent_string):
self.shared['indent_strings'].append(self.indent_string)
def __enter__(self):
return self
def __exit__(self, type, value, traceback):
self.shared['indent_strings'].pop()
def __call__(self, s, newline=True, stream=STDOUT):
if newline:
s = tsplit(s, NEWLINES)
s = map(str, s)
indent = ''.join(self.shared['indent_strings'])
s = (str('\n' + indent)).join(s)
_str = ''.join((
''.join(self.shared['indent_strings']),
str(s),
'\n' if newline else ''
))
stream(_str)
def puts(s='', newline=True, stream=STDOUT):
"""Prints given string to stdout via Writer interface."""
Writer()(s, newline, stream=stream)
def puts_err(s='', newline=True, stream=STDERR):
"""Prints given string to stderr via Writer interface."""
Writer()(s, newline, stream=stream)
def indent(indent=4, quote=''):
"""Indentation context manager."""
return Writer(indent=indent, quote=quote)
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