Mercurial Repositories > eric / file comparison
comparison: ThirdParty/Pygments/pygments/filter.py
ThirdParty/Pygments/pygments/filter.py
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- child 684
- 2f29a0b6e1c7
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| 1 # -*- coding: utf-8 -*- | |
| 2 """ | |
| 3 pygments.filter | |
| 4 ~~~~~~~~~~~~~~~ | |
| 5 | |
| 6 Module that implements the default filter. | |
| 7 | |
| 8 :copyright: Copyright 2006-2009 by the Pygments team, see AUTHORS. | |
| 9 :license: BSD, see LICENSE for details. | |
| 10 """ | |
| 11 | |
| 12 | |
| 13 def apply_filters(stream, filters, lexer=None): | |
| 14 """ | |
| 15 Use this method to apply an iterable of filters to | |
| 16 a stream. If lexer is given it's forwarded to the | |
| 17 filter, otherwise the filter receives `None`. | |
| 18 """ | |
| 19 def _apply(filter_, stream): | |
| 20 for token in filter_.filter(lexer, stream): | |
| 21 yield token | |
| 22 for filter_ in filters: | |
| 23 stream = _apply(filter_, stream) | |
| 24 return stream | |
| 25 | |
| 26 | |
| 27 def simplefilter(f): | |
| 28 """ | |
| 29 Decorator that converts a function into a filter:: | |
| 30 | |
| 31 @simplefilter | |
| 32 def lowercase(lexer, stream, options): | |
| 33 for ttype, value in stream: | |
| 34 yield ttype, value.lower() | |
| 35 """ | |
| 36 return type(f.__name__, (FunctionFilter,), { | |
| 37 'function': f, | |
| 38 '__module__': getattr(f, '__module__'), | |
| 39 '__doc__': f.__doc__ | |
| 40 }) | |
| 41 | |
| 42 | |
| 43 class Filter(object): | |
| 44 """ | |
| 45 Default filter. Subclass this class or use the `simplefilter` | |
| 46 decorator to create own filters. | |
| 47 """ | |
| 48 | |
| 49 def __init__(self, **options): | |
| 50 self.options = options | |
| 51 | |
| 52 def filter(self, lexer, stream): | |
| 53 raise NotImplementedError() | |
| 54 | |
| 55 | |
| 56 class FunctionFilter(Filter): | |
| 57 """ | |
| 58 Abstract class used by `simplefilter` to create simple | |
| 59 function filters on the fly. The `simplefilter` decorator | |
| 60 automatically creates subclasses of this class for | |
| 61 functions passed to it. | |
| 62 """ | |
| 63 function = None | |
| 64 | |
| 65 def __init__(self, **options): | |
| 66 if not hasattr(self, 'function'): | |
| 67 raise TypeError('%r used without bound function' % | |
| 68 self.__class__.__name__) | |
| 69 Filter.__init__(self, **options) | |
| 70 | |
| 71 def filter(self, lexer, stream): | |
| 72 # pylint: disable-msg=E1102 | |
| 73 for ttype, value in self.function(lexer, stream, self.options): | |
| 74 yield ttype, value |
