| """ | |
| pygments.modeline | |
| ~~~~~~~~~~~~~~~~~ | |
| A simple modeline parser (based on pymodeline). | |
| :copyright: Copyright 2006-2025 by the Pygments team, see AUTHORS. | |
| :license: BSD, see LICENSE for details. | |
| """ | |
| import re | |
| __all__ = ['get_filetype_from_buffer'] | |
| modeline_re = re.compile(r''' | |
| (?: vi | vim | ex ) (?: [<=>]? \d* )? : | |
| .* (?: ft | filetype | syn | syntax ) = ( [^:\s]+ ) | |
| ''', re.VERBOSE) | |
| def get_filetype_from_line(l): # noqa: E741 | |
| m = modeline_re.search(l) | |
| if m: | |
| return m.group(1) | |
| def get_filetype_from_buffer(buf, max_lines=5): | |
| """ | |
| Scan the buffer for modelines and return filetype if one is found. | |
| """ | |
| lines = buf.splitlines() | |
| for line in lines[-1:-max_lines-1:-1]: | |
| ret = get_filetype_from_line(line) | |
| if ret: | |
| return ret | |
| for i in range(max_lines, -1, -1): | |
| if i < len(lines): | |
| ret = get_filetype_from_line(lines[i]) | |
| if ret: | |
| return ret | |
| return None | |