Permalink
Switch branches/tags
Nothing to show
Find file
Fetching contributors…
Cannot retrieve contributors at this time
275 lines (215 sloc) 7.27 KB
import vim
import re
import textwrap
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
match = re.match('^(\s*).*$', vim.current.buffer[upper-1])
return (upper, lower, match.group(1))
def join_rows(rows, sep='\n'):
"""Given a list of rows (a list of lists) this function returns a
flattened list where each the individual columns of all rows are joined
together using the line separator.
"""
output = []
for row in rows:
# grow output array, if necessary
if len(output) <= len(row):
for i in range(len(row) - len(output)):
output.extend([[]])
for i, field in enumerate(row):
field_text = field.strip()
if field_text:
output[i].append(field_text)
return map(lambda lines: sep.join(lines), output)
def line_is_separator(line):
return re.match('^[\t +=-]+$', line)
def has_line_seps(raw_lines):
for line in raw_lines:
if line_is_separator(line):
return True
return False
def partition_raw_lines(raw_lines):
"""Partitions a list of raw input lines so that between each partition, a
table row separator can be placed.
"""
if not has_line_seps(raw_lines):
return map(lambda x: [x], raw_lines)
curr_part = []
parts = [curr_part]
for line in raw_lines:
if line_is_separator(line):
curr_part = []
parts.append(curr_part)
else:
curr_part.append(line)
# remove any empty partitions (typically the first and last ones)
return filter(lambda x: x != [], parts)
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):
row_partition = partition_raw_lines(raw_lines)
lines = map(lambda row_string: join_rows(map(split_table_row, row_string)),
row_partition)
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_field_width(field_text):
return max(map(lambda s: len(s), field_text.split('\n')))
def split_row_into_lines(row):
row = map(lambda field: field.split('\n'), row)
height = max(map(lambda field_lines: len(field_lines), row))
turn_table = []
for i in range(height):
fields = []
for field_lines in row:
if i < len(field_lines):
fields.append(field_lines[i])
else:
fields.append('')
turn_table.append(fields)
return turn_table
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 = get_field_width(field_text)
widths[i] = max(widths[i], field_width)
return widths
def get_column_widths_from_border_spec(slice):
border = None
for row in slice:
if line_is_separator(row):
border = row.strip()
break
if border is None:
raise RuntimeError('Cannot reflow this table. Top table border not found.')
left = right = None
if border[0] == '+':
left = 1
if border[-1] == '+':
right = -1
return map(lambda drawing: max(0, len(drawing) - 2), border[left:right].split('+'))
def pad_fields(row, widths):
"""Pads fields of the given row, so each field lines up nicely with the
others.
"""
widths = map(lambda w: ' %-' + str(w) + 's ', widths)
# Pad all fields using the calculated widths
new_row = []
for i in range(len(row)):
col = row[i]
col = widths[i] % col.strip()
new_row.append(col)
return new_row
def reflow_row_contents(row, widths):
new_row = []
for i, field in enumerate(row):
wrapped_lines = textwrap.wrap(field.replace('\n', ' '), widths[i])
new_row.append("\n".join(wrapped_lines))
return new_row
def draw_table(indent, table, manual_widths=None):
if table == []:
return []
if manual_widths is None:
col_widths = get_column_widths(table)
else:
col_widths = manual_widths
# Reserve room for the spaces
sep_col_widths = map(lambda x: x + 2, col_widths)
header_line = table_line(sep_col_widths, header=True)
normal_line = table_line(sep_col_widths, header=False)
output = [indent+normal_line]
first = True
for row in table:
if manual_widths:
row = reflow_row_contents(row, manual_widths)
row_lines = split_row_into_lines(row)
# draw the lines (num_lines) for this row
for row_line in row_lines:
row_line = pad_fields(row_line, col_widths)
output.append(indent+"|".join([''] + row_line + ['']))
# then, draw the separator
if first:
output.append(indent+header_line)
first = False
else:
output.append(indent+normal_line)
return output
@bridged
def reformat_table():
upper, lower, indent = get_table_bounds()
slice = vim.current.buffer[upper - 1:lower]
table = parse_table(slice)
slice = draw_table(indent, table)
vim.current.buffer[upper - 1:lower] = slice
@bridged
def reflow_table():
upper, lower, indent = get_table_bounds()
slice = vim.current.buffer[upper - 1:lower]
widths = get_column_widths_from_border_spec(slice)
table = parse_table(slice)
slice = draw_table(indent, table, widths)
vim.current.buffer[upper - 1:lower] = slice