Indent

Indent.py

import sys

import editor

TAB = ' ' * 4    # configure here
LEN = len(TAB)

try:
    start, end = editor.get_selection()
except ValueError:
    sys.exit()
line_start, line_end = editor.get_line_selection()
text = editor.get_text()[line_start:line_end]
 
if sys.argv[1] == '-i':
    lines = [TAB + l for l in text.splitlines()]
    start += LEN
    end += LEN * len(lines)
else:
    lines = []
    for l in text.splitlines():
        if l.startswith(TAB):
            l = l[LEN:]
            end -= LEN
        lines.append(l)
    if text.startswith(TAB):
        start -= LEN

if text.endswith('\n'):
    lines.append('')
text = '\n'.join(lines)
 
editor.replace_text(line_start, line_end, text)
editor.set_selection(start, end)