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# -*- coding: utf-8 -*-
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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"""
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kallithea.lib.pygmentsutils
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~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Functions for extracting internal Pygments data.
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This file was forked by the Kallithea project in July 2014.
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Original author and date, and relevant copyright and licensing information is below:
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:created_on: Jan 5, 2011
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:author: marcink
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:copyright: (c) 2013 RhodeCode GmbH, and others.
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:license: GPLv3, see LICENSE.md for more details.
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"""
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from collections import defaultdict
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from pygments import lexers
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def get_extension_descriptions():
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"""
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Based on what's inside pygments lexers, return a mapping from lowercase
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extensions to lists of very brief descriptions.
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"""
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ext_descs = defaultdict(list)
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for lx, t in sorted(lexers.LEXERS.items()):
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desc = lx.replace('Lexer', '')
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for glob in t[-2]:
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s = glob.lstrip('*').lstrip('.').lower()
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start = s.find('[')
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if start > -1 and s.endswith(']'):
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# expand trailing [] range
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prefix = s[:start]
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for char in s[start + 1:-1]:
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ext_descs[prefix + char].append(desc)
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else:
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# use stripped glob as extension
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ext_descs[s].append(desc)
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return dict(ext_descs)
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def get_index_filenames():
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"""
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Get list of known indexable filenames from pygment lexer internals
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"""
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filenames = []
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for lx, t in sorted(lexers.LEXERS.items()):
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for f in t[-2]:
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if '*' not in f and '[' not in f:
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filenames.append(f)
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return filenames
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def get_custom_lexer(extension):
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"""
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returns a custom lexer if it's defined in rcextensions module, or None
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if there's no custom lexer defined
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"""
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import kallithea
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lexer_name = getattr(kallithea.EXTENSIONS, 'EXTRA_LEXERS', {}).get(extension)
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if lexer_name is None:
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return None
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return lexers.get_lexer_by_name(lexer_name)
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