Mercurial > genshi > mirror
annotate genshi/template/text.py @ 425:073640758a42 trunk
Try to use proper reStructuredText for docstrings throughout.
author | cmlenz |
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date | Thu, 22 Mar 2007 12:45:18 +0000 |
parents | 4675d5cf6c67 |
children | 97544725bb7f |
rev | line source |
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1 # -*- coding: utf-8 -*- |
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2 # |
408 | 3 # Copyright (C) 2006-2007 Edgewall Software |
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4 # All rights reserved. |
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5 # |
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6 # This software is licensed as described in the file COPYING, which |
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7 # you should have received as part of this distribution. The terms |
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8 # are also available at http://genshi.edgewall.org/wiki/License. |
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9 # |
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10 # This software consists of voluntary contributions made by many |
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11 # individuals. For the exact contribution history, see the revision |
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12 # history and logs, available at http://genshi.edgewall.org/log/. |
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13 |
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14 """Plain text templating engine.""" |
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15 |
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16 import re |
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17 |
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18 from genshi.template.base import BadDirectiveError, Template, SUB |
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19 from genshi.template.directives import * |
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20 from genshi.template.interpolation import interpolate |
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21 |
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22 __all__ = ['TextTemplate'] |
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23 __docformat__ = 'restructuredtext en' |
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24 |
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25 |
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26 class TextTemplate(Template): |
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27 """Implementation of a simple text-based template engine. |
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28 |
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29 >>> tmpl = TextTemplate('''Dear $name, |
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30 ... |
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31 ... We have the following items for you: |
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32 ... #for item in items |
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33 ... * $item |
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34 ... #end |
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35 ... |
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36 ... All the best, |
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37 ... Foobar''') |
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38 >>> print tmpl.generate(name='Joe', items=[1, 2, 3]).render('text') |
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39 Dear Joe, |
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40 <BLANKLINE> |
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41 We have the following items for you: |
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42 * 1 |
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43 * 2 |
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44 * 3 |
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45 <BLANKLINE> |
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46 All the best, |
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47 Foobar |
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48 """ |
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49 directives = [('def', DefDirective), |
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50 ('when', WhenDirective), |
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51 ('otherwise', OtherwiseDirective), |
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52 ('for', ForDirective), |
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53 ('if', IfDirective), |
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54 ('choose', ChooseDirective), |
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55 ('with', WithDirective)] |
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56 |
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57 _DIRECTIVE_RE = re.compile(r'(?:^[ \t]*(?<!\\)#(end).*\n?)|' |
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58 r'(?:^[ \t]*(?<!\\)#((?:\w+|#).*)\n?)', |
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59 re.MULTILINE) |
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60 |
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`MarkupTemplate`s can now be instantiated from markup streams, in addition to strings and file-like objects. Thanks to David Fraser for the patch. Closes #69.
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61 def _parse(self, source, encoding): |
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62 """Parse the template from text input.""" |
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63 stream = [] # list of events of the "compiled" template |
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64 dirmap = {} # temporary mapping of directives to elements |
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65 depth = 0 |
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66 if not encoding: |
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67 encoding = 'utf-8' |
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68 |
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69 source = source.read().decode(encoding, 'replace') |
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70 offset = 0 |
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71 lineno = 1 |
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72 |
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73 for idx, mo in enumerate(self._DIRECTIVE_RE.finditer(source)): |
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74 start, end = mo.span() |
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75 if start > offset: |
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76 text = source[offset:start] |
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77 for kind, data, pos in interpolate(text, self.basedir, |
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78 self.filename, lineno): |
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79 stream.append((kind, data, pos)) |
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80 lineno += len(text.splitlines()) |
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81 |
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82 text = source[start:end].lstrip()[1:] |
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83 lineno += len(text.splitlines()) |
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84 directive = text.split(None, 1) |
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85 if len(directive) > 1: |
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86 command, value = directive |
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87 else: |
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88 command, value = directive[0], None |
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89 |
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90 if command == 'end': |
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91 depth -= 1 |
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92 if depth in dirmap: |
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93 directive, start_offset = dirmap.pop(depth) |
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94 substream = stream[start_offset:] |
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95 stream[start_offset:] = [(SUB, ([directive], substream), |
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96 (self.filepath, lineno, 0))] |
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97 elif command != '#': |
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98 cls = self._dir_by_name.get(command) |
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99 if cls is None: |
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100 raise BadDirectiveError(command) |
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101 directive = cls, value, None, (self.filepath, lineno, 0) |
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102 dirmap[depth] = (directive, len(stream)) |
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103 depth += 1 |
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104 |
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105 offset = end |
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106 |
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107 if offset < len(source): |
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108 text = source[offset:].replace('\\#', '#') |
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109 for kind, data, pos in interpolate(text, self.basedir, |
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110 self.filename, lineno): |
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111 stream.append((kind, data, pos)) |
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112 |
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113 return stream |