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# -*- coding: utf-8 -*-
"""
pygments.formatters
~~~~~~~~~~~~~~~~~~~
Pygments formatters.
:copyright: Copyright 2006-2015 by the Pygments team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
import re
import sys
import types
import fnmatch
from os.path import basename
from pygments.formatters._mapping import FORMATTERS
from pygments.plugin import find_plugin_formatters
from pygments.util import ClassNotFound, itervalues
__all__ = ['get_formatter_by_name', 'get_formatter_for_filename',
'get_all_formatters'] + list(FORMATTERS)
_formatter_cache = {} # classes by name
_pattern_cache = {}
def _fn_matches(fn, glob):
"""Return whether the supplied file name fn matches pattern filename."""
if glob not in _pattern_cache:
pattern = _pattern_cache[glob] = re.compile(fnmatch.translate(glob))
return pattern.match(fn)
return _pattern_cache[glob].match(fn)
def _load_formatters(module_name):
"""Load a formatter (and all others in the module too)."""
mod = __import__(module_name, None, None, ['__all__'])
for formatter_name in mod.__all__:
cls = getattr(mod, formatter_name)
_formatter_cache[cls.name] = cls
def get_all_formatters():
"""Return a generator for all formatter classes."""
# NB: this returns formatter classes, not info like get_all_lexers().
for info in itervalues(FORMATTERS):
if info[1] not in _formatter_cache:
_load_formatters(info[0])
yield _formatter_cache[info[1]]
for _, formatter in find_plugin_formatters():
yield formatter
def find_formatter_class(alias):
"""Lookup a formatter by alias.
Returns None if not found.
"""
for module_name, name, aliases, _, _ in itervalues(FORMATTERS):
if alias in aliases:
if name not in _formatter_cache:
_load_formatters(module_name)
return _formatter_cache[name]
for _, cls in find_plugin_formatters():
if alias in cls.aliases:
return cls
def get_formatter_by_name(_alias, **options):
"""Lookup and instantiate a formatter by alias.
Raises ClassNotFound if not found.
"""
cls = find_formatter_class(_alias)
if cls is None:
raise ClassNotFound("no formatter found for name %r" % _alias)
return cls(**options)
def get_formatter_for_filename(fn, **options):
"""Lookup and instantiate a formatter by filename pattern.
Raises ClassNotFound if not found.
"""
fn = basename(fn)
for modname, name, _, filenames, _ in itervalues(FORMATTERS):
for filename in filenames:
if _fn_matches(fn, filename):
if name not in _formatter_cache:
_load_formatters(modname)
return _formatter_cache[name](**options)
for cls in find_plugin_formatters():
for filename in cls.filenames:
if _fn_matches(fn, filename):
return cls(**options)
raise ClassNotFound("no formatter found for file name %r" % fn)
class _automodule(types.ModuleType):
"""Automatically import formatters."""
def __getattr__(self, name):
info = FORMATTERS.get(name)
if info:
_load_formatters(info[0])
cls = _formatter_cache[info[1]]
setattr(self, name, cls)
return cls
raise AttributeError(name)
oldmod = sys.modules[__name__]
newmod = _automodule(__name__)
newmod.__dict__.update(oldmod.__dict__)
sys.modules[__name__] = newmod
del newmod.newmod, newmod.oldmod, newmod.sys, newmod.types
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