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import vim
import re
from vim_bridge import bridged
def get_table_bounds():
row, col = vim.current.window.cursor
upper = lower = row
try:
while vim.current.buffer[upper - 1].strip():
upper -= 1
except IndexError:
pass
else:
upper += 1
try:
while vim.current.buffer[lower - 1].strip():
lower += 1
except IndexError:
pass
else:
lower -= 1
return (upper, lower)
def join_rows(rows, sep='\n'):
"""Given a list of rows (a list of lists) this function returns a
flattened list where each the individual columns of all rows are joined
together using the line separator.
"""
output = []
for row in rows:
# grow output array, if necessary
if len(output) <= len(row):
for i in range(len(row) - len(output)):
output.extend([[]])
for i, field in enumerate(row):
field_text = field.strip()
if field_text:
output[i].append(field_text)
return map(lambda lines: sep.join(lines), output)
def unify_table(table):
"""Given a list of rows (i.e. a table), this function returns a new table
in which all rows have an equal amount of columns. If all full column is
empty (i.e. all rows have that field empty), the column is removed.
"""
max_fields = max(map(lambda row: len(row), table))
empty_cols = [True] * max_fields
output = []
for row in table:
curr_len = len(row)
if curr_len < max_fields:
row += [''] * (max_fields - curr_len)
output.append(row)
# register empty columns (to be removed at the end)
for i in range(len(row)):
if row[i].strip():
empty_cols[i] = False
# remove empty columns from all rows
table = output
output = []
for row in table:
cols = []
for i in range(len(row)):
should_remove = empty_cols[i]
if not should_remove:
cols.append(row[i])
output.append(cols)
return output
def split_table_row(row_string):
if row_string.find("|") >= 0:
# first, strip off the outer table drawings
row_string = re.sub(r'^\s*\||\|\s*$', '', row_string)
return re.split(r'\s*\|\s*', row_string.strip())
return re.split(r'\s\s+', row_string.rstrip())
def parse_table(raw_lines):
select_data_lines = lambda line: not re.match('^[\t +=-]+$', line)
lines = filter(select_data_lines, raw_lines)
lines = map(split_table_row, lines)
return unify_table(lines)
def table_line(widths, header=False):
if header:
linechar = '='
else:
linechar = '-'
sep = '+'
parts = []
for width in widths:
parts.append(linechar * width)
if parts:
parts = [''] + parts + ['']
return sep.join(parts)
def get_column_widths(table):
widths = []
for row in table:
num_fields = len(row)
# dynamically grow
if num_fields >= len(widths):
widths.extend([0] * (num_fields - len(widths)))
for i in range(num_fields):
field_text = row[i]
field_width = len(field_text)
widths[i] = max(widths[i], field_width)
return widths
def pad_fields(table, widths=None):
"""Pads fields of the table, so each row lines up nicely with the others.
If the widths param is None, the widths are calculated automatically.
"""
if widths is None:
widths = get_column_widths(table)
widths = map(lambda w: ' %-' + str(w) + 's ', widths)
# Pad all fields using the calculated widths
output = []
for row in table:
new_row = []
for i in range(len(row)):
col = row[i]
col = widths[i] % col.strip()
new_row.append(col)
output.append(new_row)
return output
def draw_table(table):
if table == []:
return []
col_widths = get_column_widths(table)
table = pad_fields(table, col_widths)
# Reserve room for the spaces
col_widths = map(lambda x: x + 2, col_widths)
header_line = table_line(col_widths, header=True)
normal_line = table_line(col_widths, header=False)
output = [header_line]
first = True
for row in table:
output.append("|".join([''] + row + ['']))
if first:
output.append(header_line)
first = False
else:
output.append(normal_line)
return output
@bridged
def reformat_table():
upper, lower = get_table_bounds()
slice = vim.current.buffer[upper - 1:lower]
table = parse_table(slice)
slice = draw_table(table)
vim.current.buffer[upper - 1:lower] = slice
|
