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