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import copy
import re
from typing import Optional, Tuple
ALIGN = {'<': 'left', '>': 'right', '^': 'center'}
VALIGN = {'<': 'top', '>': 'bottom', '^': 'middle'}
def parse_align_spec(align_spec: Optional[str]) -> Tuple[Optional[str], Optional[str]]:
"""
Parse AsciiDoc cell alignment specifier and return 2-tuple with
horizontal and vertical alignment names. Unspecified alignments
set to None.
"""
result = (None, None)
if align_spec:
mo = re.match(r'^([<\^>])?(\.([<\^>]))?$', align_spec)
if mo:
result = (
ALIGN.get(mo.group(1)),
VALIGN.get(mo.group(3)),
)
return result
# TODO: remove _table_ from name once Table class has been moved into this file
def parse_table_span_spec(span_spec: Optional[str]) -> Tuple[int, int]:
"""
Parse AsciiDoc cell span specifier and return 2-tuple with horizontal
and vertical span counts. Set default values (1,1) if not
specified.
"""
result = (None, None)
if span_spec:
mo = re.match(r'^(\d+)?(\.(\d+))?$', span_spec)
if mo:
result = (
mo.group(1) and int(mo.group(1)),
mo.group(3) and int(mo.group(3)),
)
return (result[0] or 1, result[1] or 1)
class Column:
"""Table column."""
def __init__(self, width=None, align_spec=None, style=None):
self.width = width or '1'
self.halign, self.valign = parse_align_spec(align_spec)
self.style = style # Style name or None.
# Calculated attribute values.
self.abswidth = None # 1.. (page units).
self.pcwidth = None # 1..99 (percentage).
class Cell:
def __init__(self, data, span_spec=None, align_spec=None, style=None):
self.data = data
self.span, self.vspan = parse_table_span_spec(span_spec)
self.halign, self.valign = parse_align_spec(align_spec)
self.style = style
self.reserved = False
def __repr__(self):
return '<Cell: %d.%d %s.%s %s "%s">' % (
self.span, self.vspan,
self.halign, self.valign,
self.style or '',
self.data)
def clone_reserve(self):
"""Return a clone of self to reserve vertically spanned cell."""
result = copy.copy(self)
result.vspan = 1
result.reserved = True
return result
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