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# -*- coding: utf-8 -*-
"""Format adapter for the terminaltables module."""
from __future__ import unicode_literals
import terminaltables
import itertools
from cli_helpers.utils import filter_dict_by_key
from cli_helpers.compat import (Terminal256Formatter, StringIO)
from .preprocessors import (convert_to_string, truncate_string, override_missing_value,
style_output, HAS_PYGMENTS,
override_tab_value, escape_newlines)
supported_formats = ('ascii', 'double', 'github')
preprocessors = (
override_missing_value, convert_to_string, override_tab_value,
truncate_string, style_output, escape_newlines
)
table_format_handler = {
'ascii': terminaltables.AsciiTable,
'double': terminaltables.DoubleTable,
'github': terminaltables.GithubFlavoredMarkdownTable,
}
def style_output_table(format_name=""):
def style_output(data, headers, style=None,
table_separator_token='Token.Output.TableSeparator', **_):
"""Style the *table* (e.g. bold, italic, and colors)
.. NOTE::
This requires the `Pygments <http://pygments.org/>`_ library to
be installed. You can install it with CLI Helpers as an extra::
$ pip install cli_helpers[styles]
Example usage::
from cli_helpers.tabular_output import terminaltables_adapter
from pygments.style import Style
from pygments.token import Token
class YourStyle(Style):
default_style = ""
styles = {
Token.Output.TableSeparator: '#ansigray'
}
headers = ('First Name', 'Last Name')
data = [['Fred', 'Roberts'], ['George', 'Smith']]
style_output_table = terminaltables_adapter.style_output_table('psql')
style_output_table(data, headers, style=CliStyle)
output = terminaltables_adapter.adapter(data, headers, style=YourStyle)
:param iterable data: An :term:`iterable` (e.g. list) of rows.
:param iterable headers: The column headers.
:param str/pygments.style.Style style: A Pygments style. You can `create
your own styles <https://pygments.org/docs/styles#creating-own-styles>`_.
:param str table_separator_token: The token type to be used for the table separator.
:return: data and headers.
:rtype: tuple
"""
if style and HAS_PYGMENTS and format_name in supported_formats:
formatter = Terminal256Formatter(style=style)
def style_field(token, field):
"""Get the styled text for a *field* using *token* type."""
s = StringIO()
formatter.format(((token, field),), s)
return s.getvalue()
clss = table_format_handler[format_name]
for char in [char for char in terminaltables.base_table.BaseTable.__dict__ if char.startswith("CHAR_")]:
setattr(clss, char, style_field(
table_separator_token, getattr(clss, char)))
return iter(data), headers
return style_output
def adapter(data, headers, table_format=None, **kwargs):
"""Wrap terminaltables inside a function for TabularOutputFormatter."""
keys = ('title', )
table = table_format_handler[table_format]
t = table([headers] + list(data), **filter_dict_by_key(kwargs, keys))
dimensions = terminaltables.width_and_alignment.max_dimensions(
t.table_data,
t.padding_left,
t.padding_right)[:3]
for r in t.gen_table(*dimensions):
yield u''.join(r)
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