Mercurial > genshi > genshi-test
annotate markup/template.py @ 193:76129a79458d
Fix for Python 2.3 compatibility in `py:with` directive (regression in [240]).
author | cmlenz |
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date | Thu, 24 Aug 2006 19:03:24 +0000 |
parents | cda3bdfc19ed |
children | 58284b6b0009 |
rev | line source |
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1 | 1 # -*- coding: utf-8 -*- |
2 # | |
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3 # Copyright (C) 2006 Edgewall Software |
1 | 4 # All rights reserved. |
5 # | |
6 # This software is licensed as described in the file COPYING, which | |
7 # you should have received as part of this distribution. The terms | |
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8 # are also available at http://markup.edgewall.org/wiki/License. |
1 | 9 # |
10 # This software consists of voluntary contributions made by many | |
11 # individuals. For the exact contribution history, see the revision | |
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12 # history and logs, available at http://markup.edgewall.org/log/. |
1 | 13 |
82 | 14 """Implementation of the template engine.""" |
1 | 15 |
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16 try: |
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17 from collections import deque |
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18 except ImportError: |
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19 class deque(list): |
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20 def appendleft(self, x): self.insert(0, x) |
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21 def popleft(self): return self.pop(0) |
1 | 22 import compiler |
23 import os | |
24 import re | |
25 from StringIO import StringIO | |
26 | |
182
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27 from markup.core import Attrs, Namespace, Stream, StreamEventKind, _ensure |
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28 from markup.core import START, END, START_NS, END_NS, TEXT, COMMENT |
1 | 29 from markup.eval import Expression |
69 | 30 from markup.input import XMLParser |
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31 from markup.path import Path |
1 | 32 |
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33 __all__ = ['BadDirectiveError', 'TemplateError', 'TemplateSyntaxError', |
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34 'TemplateNotFound', 'Template', 'TemplateLoader'] |
1 | 35 |
36 | |
37 class TemplateError(Exception): | |
38 """Base exception class for errors related to template processing.""" | |
39 | |
40 | |
41 class TemplateSyntaxError(TemplateError): | |
42 """Exception raised when an expression in a template causes a Python syntax | |
43 error.""" | |
44 | |
45 def __init__(self, message, filename='<string>', lineno=-1, offset=-1): | |
46 if isinstance(message, SyntaxError) and message.lineno is not None: | |
47 message = str(message).replace(' (line %d)' % message.lineno, '') | |
80 | 48 message = '%s (%s, line %d)' % (message, filename, lineno) |
1 | 49 TemplateError.__init__(self, message) |
50 self.filename = filename | |
51 self.lineno = lineno | |
52 self.offset = offset | |
53 | |
54 | |
55 class BadDirectiveError(TemplateSyntaxError): | |
56 """Exception raised when an unknown directive is encountered when parsing | |
57 a template. | |
58 | |
59 An unknown directive is any attribute using the namespace for directives, | |
60 with a local name that doesn't match any registered directive. | |
61 """ | |
62 | |
63 def __init__(self, name, filename='<string>', lineno=-1): | |
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64 msg = 'bad directive "%s"' % name.localname |
80 | 65 TemplateSyntaxError.__init__(self, msg, filename, lineno) |
1 | 66 |
67 | |
68 class TemplateNotFound(TemplateError): | |
69 """Exception raised when a specific template file could not be found.""" | |
70 | |
71 def __init__(self, name, search_path): | |
72 TemplateError.__init__(self, 'Template "%s" not found' % name) | |
73 self.search_path = search_path | |
74 | |
75 | |
76 class Context(object): | |
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77 """Container for template input data. |
1 | 78 |
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79 A context provides a stack of scopes (represented by dictionaries). |
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80 |
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81 Template directives such as loops can push a new scope on the stack with |
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82 data that should only be available inside the loop. When the loop |
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83 terminates, that scope can get popped off the stack again. |
1 | 84 |
85 >>> ctxt = Context(one='foo', other=1) | |
86 >>> ctxt.get('one') | |
87 'foo' | |
88 >>> ctxt.get('other') | |
89 1 | |
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90 >>> ctxt.push(dict(one='frost')) |
1 | 91 >>> ctxt.get('one') |
92 'frost' | |
93 >>> ctxt.get('other') | |
94 1 | |
95 >>> ctxt.pop() | |
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96 {'one': 'frost'} |
1 | 97 >>> ctxt.get('one') |
98 'foo' | |
99 """ | |
100 | |
101 def __init__(self, **data): | |
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102 self.frames = deque([data]) |
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103 self.pop = self.frames.popleft |
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104 self.push = self.frames.appendleft |
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105 self._match_templates = [] |
1 | 106 |
107 def __repr__(self): | |
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108 return repr(self.frames) |
1 | 109 |
110 def __setitem__(self, key, value): | |
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111 """Set a variable in the current scope.""" |
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112 self.frames[0][key] = value |
1 | 113 |
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114 def get(self, key, default=None): |
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115 """Get a variable's value, starting at the current scope and going |
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116 upward. |
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117 """ |
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118 for frame in self.frames: |
1 | 119 if key in frame: |
120 return frame[key] | |
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121 return default |
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122 __getitem__ = get |
1 | 123 |
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124 def push(self, data): |
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125 """Push a new scope on the stack.""" |
1 | 126 |
127 def pop(self): | |
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128 """Pop the top-most scope from the stack.""" |
1 | 129 |
130 | |
131 class Directive(object): | |
132 """Abstract base class for template directives. | |
133 | |
54 | 134 A directive is basically a callable that takes three positional arguments: |
135 `ctxt` is the template data context, `stream` is an iterable over the | |
136 events that the directive applies to, and `directives` is is a list of | |
137 other directives on the same stream that need to be applied. | |
1 | 138 |
139 Directives can be "anonymous" or "registered". Registered directives can be | |
140 applied by the template author using an XML attribute with the | |
141 corresponding name in the template. Such directives should be subclasses of | |
31 | 142 this base class that can be instantiated with the value of the directive |
143 attribute as parameter. | |
1 | 144 |
145 Anonymous directives are simply functions conforming to the protocol | |
146 described above, and can only be applied programmatically (for example by | |
147 template filters). | |
148 """ | |
149 __slots__ = ['expr'] | |
150 | |
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151 def __init__(self, value, filename=None, lineno=-1, offset=-1): |
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152 try: |
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153 self.expr = value and Expression(value, filename, lineno) or None |
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154 except SyntaxError, err: |
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155 err.msg += ' in expression "%s" of "%s" directive' % (value, |
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156 self.tagname) |
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157 raise TemplateSyntaxError(err, filename, lineno, |
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158 offset + (err.offset or 0)) |
1 | 159 |
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160 def __call__(self, stream, ctxt, directives): |
1 | 161 raise NotImplementedError |
162 | |
163 def __repr__(self): | |
164 expr = '' | |
165 if self.expr is not None: | |
166 expr = ' "%s"' % self.expr.source | |
167 return '<%s%s>' % (self.__class__.__name__, expr) | |
168 | |
172
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169 def tagname(self): |
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170 """Return the local tag name of the directive as it is used in |
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171 templates. |
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172 """ |
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173 return self.__class__.__name__.lower().replace('directive', '') |
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174 tagname = property(tagname) |
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175 |
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176 |
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177 def _apply_directives(stream, ctxt, directives): |
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178 """Apply the given directives to the stream.""" |
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179 if directives: |
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180 stream = directives[0](iter(stream), ctxt, directives[1:]) |
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181 return stream |
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182 |
1 | 183 |
184 class AttrsDirective(Directive): | |
185 """Implementation of the `py:attrs` template directive. | |
186 | |
187 The value of the `py:attrs` attribute should be a dictionary. The keys and | |
188 values of that dictionary will be added as attributes to the element: | |
189 | |
61 | 190 >>> tmpl = Template('''<ul xmlns:py="http://markup.edgewall.org/"> |
1 | 191 ... <li py:attrs="foo">Bar</li> |
192 ... </ul>''') | |
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193 >>> print tmpl.generate(foo={'class': 'collapse'}) |
1 | 194 <ul> |
195 <li class="collapse">Bar</li> | |
196 </ul> | |
197 | |
198 If the value evaluates to `None` (or any other non-truth value), no | |
199 attributes are added: | |
200 | |
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201 >>> print tmpl.generate(foo=None) |
1 | 202 <ul> |
203 <li>Bar</li> | |
204 </ul> | |
205 """ | |
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206 __slots__ = [] |
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207 |
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208 def __call__(self, stream, ctxt, directives): |
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209 def _generate(): |
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210 kind, (tag, attrib), pos = stream.next() |
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211 attrs = self.expr.evaluate(ctxt) |
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212 if attrs: |
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213 attrib = Attrs(attrib[:]) |
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214 if isinstance(attrs, Stream): |
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215 try: |
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216 attrs = iter(attrs).next() |
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217 except StopIteration: |
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218 attrs = [] |
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219 elif not isinstance(attrs, list): # assume it's a dict |
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220 attrs = attrs.items() |
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221 for name, value in attrs: |
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222 if value is None: |
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223 attrib.remove(name) |
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224 else: |
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225 attrib.set(name, unicode(value).strip()) |
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226 yield kind, (tag, attrib), pos |
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227 for event in stream: |
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228 yield event |
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229 |
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230 return _apply_directives(_generate(), ctxt, directives) |
1 | 231 |
232 | |
233 class ContentDirective(Directive): | |
234 """Implementation of the `py:content` template directive. | |
235 | |
236 This directive replaces the content of the element with the result of | |
237 evaluating the value of the `py:content` attribute: | |
238 | |
61 | 239 >>> tmpl = Template('''<ul xmlns:py="http://markup.edgewall.org/"> |
1 | 240 ... <li py:content="bar">Hello</li> |
241 ... </ul>''') | |
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242 >>> print tmpl.generate(bar='Bye') |
1 | 243 <ul> |
244 <li>Bye</li> | |
245 </ul> | |
246 """ | |
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247 __slots__ = [] |
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248 |
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249 def __call__(self, stream, ctxt, directives): |
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250 def _generate(): |
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251 kind, data, pos = stream.next() |
101 | 252 if kind is START: |
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253 yield kind, data, pos # emit start tag |
69 | 254 yield EXPR, self.expr, pos |
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255 previous = stream.next() |
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256 for event in stream: |
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257 previous = event |
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258 if previous is not None: |
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259 yield previous |
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260 |
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261 return _apply_directives(_generate(), ctxt, directives) |
1 | 262 |
263 | |
264 class DefDirective(Directive): | |
265 """Implementation of the `py:def` template directive. | |
266 | |
267 This directive can be used to create "Named Template Functions", which | |
268 are template snippets that are not actually output during normal | |
269 processing, but rather can be expanded from expressions in other places | |
270 in the template. | |
271 | |
272 A named template function can be used just like a normal Python function | |
273 from template expressions: | |
274 | |
61 | 275 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
1 | 276 ... <p py:def="echo(greeting, name='world')" class="message"> |
277 ... ${greeting}, ${name}! | |
278 ... </p> | |
90
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279 ... ${echo('Hi', name='you')} |
1 | 280 ... </div>''') |
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281 >>> print tmpl.generate(bar='Bye') |
1 | 282 <div> |
283 <p class="message"> | |
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284 Hi, you! |
1 | 285 </p> |
286 </div> | |
287 | |
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288 If a function does not require parameters, the parenthesis can be omitted |
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289 both when defining and when calling it: |
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290 |
61 | 291 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
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292 ... <p py:def="helloworld" class="message"> |
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293 ... Hello, world! |
1 | 294 ... </p> |
90
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295 ... ${helloworld} |
1 | 296 ... </div>''') |
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297 >>> print tmpl.generate(bar='Bye') |
1 | 298 <div> |
299 <p class="message"> | |
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300 Hello, world! |
1 | 301 </p> |
302 </div> | |
303 """ | |
154
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304 __slots__ = ['name', 'args', 'defaults'] |
1 | 305 |
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306 ATTRIBUTE = 'function' |
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307 |
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308 def __init__(self, args, filename=None, lineno=-1, offset=-1): |
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309 Directive.__init__(self, None, filename, lineno, offset) |
1 | 310 ast = compiler.parse(args, 'eval').node |
311 self.args = [] | |
312 self.defaults = {} | |
313 if isinstance(ast, compiler.ast.CallFunc): | |
314 self.name = ast.node.name | |
315 for arg in ast.args: | |
316 if isinstance(arg, compiler.ast.Keyword): | |
317 self.args.append(arg.name) | |
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318 self.defaults[arg.name] = Expression(arg.expr, filename, |
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319 lineno) |
1 | 320 else: |
321 self.args.append(arg.name) | |
322 else: | |
323 self.name = ast.name | |
324 | |
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325 def __call__(self, stream, ctxt, directives): |
154
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326 stream = list(stream) |
1 | 327 |
154
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328 def function(*args, **kwargs): |
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329 scope = {} |
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330 args = list(args) # make mutable |
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331 for name in self.args: |
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332 if args: |
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333 scope[name] = args.pop(0) |
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334 else: |
165
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335 if name in kwargs: |
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336 val = kwargs.pop(name) |
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337 else: |
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338 val = self.defaults.get(name).evaluate(ctxt) |
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339 scope[name] = val |
154
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340 ctxt.push(scope) |
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341 for event in _apply_directives(stream, ctxt, directives): |
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342 yield event |
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343 ctxt.pop() |
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344 try: |
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345 function.__name__ = self.name |
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346 except TypeError: |
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347 # Function name can't be set in Python 2.3 |
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348 pass |
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349 |
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350 # Store the function reference in the bottom context frame so that it |
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351 # doesn't get popped off before processing the template has finished |
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352 ctxt.frames[-1][self.name] = function |
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353 |
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354 return [] |
1 | 355 |
172
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356 def __repr__(self): |
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357 return '<%s "%s">' % (self.__class__.__name__, self.name) |
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358 |
1 | 359 |
360 class ForDirective(Directive): | |
31 | 361 """Implementation of the `py:for` template directive for repeating an |
362 element based on an iterable in the context data. | |
1 | 363 |
61 | 364 >>> tmpl = Template('''<ul xmlns:py="http://markup.edgewall.org/"> |
1 | 365 ... <li py:for="item in items">${item}</li> |
366 ... </ul>''') | |
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367 >>> print tmpl.generate(items=[1, 2, 3]) |
1 | 368 <ul> |
369 <li>1</li><li>2</li><li>3</li> | |
370 </ul> | |
371 """ | |
372 __slots__ = ['targets'] | |
373 | |
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374 ATTRIBUTE = 'each' |
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375 |
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376 def __init__(self, value, filename=None, lineno=-1, offset=-1): |
181
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377 if ' in ' not in value: |
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378 raise TemplateSyntaxError('"in" keyword missing in "for" directive', |
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379 filename, lineno, offset) |
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380 targets, value = value.split(' in ', 1) |
1 | 381 self.targets = [str(name.strip()) for name in targets.split(',')] |
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382 Directive.__init__(self, value.strip(), filename, lineno, offset) |
1 | 383 |
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384 def __call__(self, stream, ctxt, directives): |
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385 iterable = self.expr.evaluate(ctxt) |
101 | 386 if iterable is None: |
387 return | |
388 | |
389 scope = {} | |
390 stream = list(stream) | |
391 targets = self.targets | |
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392 single = len(targets) == 1 |
101 | 393 for item in iter(iterable): |
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394 if single: |
101 | 395 scope[targets[0]] = item |
396 else: | |
397 for idx, name in enumerate(targets): | |
398 scope[name] = item[idx] | |
399 ctxt.push(scope) | |
400 for event in _apply_directives(stream, ctxt, directives): | |
401 yield event | |
402 ctxt.pop() | |
1 | 403 |
404 def __repr__(self): | |
405 return '<%s "%s in %s">' % (self.__class__.__name__, | |
406 ', '.join(self.targets), self.expr.source) | |
407 | |
408 | |
409 class IfDirective(Directive): | |
31 | 410 """Implementation of the `py:if` template directive for conditionally |
411 excluding elements from being output. | |
1 | 412 |
61 | 413 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
1 | 414 ... <b py:if="foo">${bar}</b> |
415 ... </div>''') | |
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416 >>> print tmpl.generate(foo=True, bar='Hello') |
1 | 417 <div> |
418 <b>Hello</b> | |
419 </div> | |
420 """ | |
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421 __slots__ = [] |
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422 |
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423 ATTRIBUTE = 'test' |
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424 |
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425 def __call__(self, stream, ctxt, directives): |
1 | 426 if self.expr.evaluate(ctxt): |
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427 return _apply_directives(stream, ctxt, directives) |
1 | 428 return [] |
429 | |
430 | |
431 class MatchDirective(Directive): | |
432 """Implementation of the `py:match` template directive. | |
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433 |
61 | 434 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
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435 ... <span py:match="greeting"> |
1 | 436 ... Hello ${select('@name')} |
437 ... </span> | |
438 ... <greeting name="Dude" /> | |
439 ... </div>''') | |
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440 >>> print tmpl.generate() |
1 | 441 <div> |
442 <span> | |
443 Hello Dude | |
444 </span> | |
445 </div> | |
446 """ | |
447 __slots__ = ['path', 'stream'] | |
448 | |
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449 ATTRIBUTE = 'path' |
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450 |
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451 def __init__(self, value, filename=None, lineno=-1, offset=-1): |
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452 Directive.__init__(self, None, filename, lineno, offset) |
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453 self.path = Path(value, filename, lineno) |
1 | 454 self.stream = [] |
455 | |
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456 def __call__(self, stream, ctxt, directives): |
1 | 457 self.stream = list(stream) |
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458 ctxt._match_templates.append((self.path.test(ignore_context=True), |
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459 self.path, self.stream, directives)) |
1 | 460 return [] |
461 | |
462 def __repr__(self): | |
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463 return '<%s "%s">' % (self.__class__.__name__, self.path.source) |
1 | 464 |
465 | |
466 class ReplaceDirective(Directive): | |
467 """Implementation of the `py:replace` template directive. | |
468 | |
31 | 469 This directive replaces the element with the result of evaluating the |
470 value of the `py:replace` attribute: | |
471 | |
61 | 472 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
1 | 473 ... <span py:replace="bar">Hello</span> |
474 ... </div>''') | |
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475 >>> print tmpl.generate(bar='Bye') |
1 | 476 <div> |
477 Bye | |
478 </div> | |
479 | |
480 This directive is equivalent to `py:content` combined with `py:strip`, | |
481 providing a less verbose way to achieve the same effect: | |
482 | |
61 | 483 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
1 | 484 ... <span py:content="bar" py:strip="">Hello</span> |
485 ... </div>''') | |
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486 >>> print tmpl.generate(bar='Bye') |
1 | 487 <div> |
488 Bye | |
489 </div> | |
490 """ | |
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491 __slots__ = [] |
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492 |
54 | 493 def __call__(self, stream, ctxt, directives): |
1 | 494 kind, data, pos = stream.next() |
69 | 495 yield EXPR, self.expr, pos |
1 | 496 |
497 | |
498 class StripDirective(Directive): | |
499 """Implementation of the `py:strip` template directive. | |
500 | |
501 When the value of the `py:strip` attribute evaluates to `True`, the element | |
502 is stripped from the output | |
503 | |
61 | 504 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
1 | 505 ... <div py:strip="True"><b>foo</b></div> |
506 ... </div>''') | |
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507 >>> print tmpl.generate() |
1 | 508 <div> |
509 <b>foo</b> | |
510 </div> | |
511 | |
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512 Leaving the attribute value empty is equivalent to a truth value. |
1 | 513 |
514 This directive is particulary interesting for named template functions or | |
515 match templates that do not generate a top-level element: | |
516 | |
61 | 517 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
1 | 518 ... <div py:def="echo(what)" py:strip=""> |
519 ... <b>${what}</b> | |
520 ... </div> | |
521 ... ${echo('foo')} | |
522 ... </div>''') | |
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523 >>> print tmpl.generate() |
1 | 524 <div> |
525 <b>foo</b> | |
526 </div> | |
527 """ | |
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528 __slots__ = [] |
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529 |
54 | 530 def __call__(self, stream, ctxt, directives): |
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531 def _generate(): |
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532 if self.expr: |
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533 strip = self.expr.evaluate(ctxt) |
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534 else: |
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535 strip = True |
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536 if strip: |
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537 stream.next() # skip start tag |
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538 previous = stream.next() |
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539 for event in stream: |
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540 yield previous |
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541 previous = event |
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542 else: |
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543 for event in stream: |
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544 yield event |
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545 |
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546 return _apply_directives(_generate(), ctxt, directives) |
1 | 547 |
548 | |
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549 class ChooseDirective(Directive): |
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550 """Implementation of the `py:choose` directive for conditionally selecting |
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551 one of several body elements to display. |
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552 |
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553 If the `py:choose` expression is empty the expressions of nested `py:when` |
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554 directives are tested for truth. The first true `py:when` body is output. |
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555 If no `py:when` directive is matched then the fallback directive |
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556 `py:otherwise` will be used. |
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557 |
61 | 558 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/" |
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559 ... py:choose=""> |
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560 ... <span py:when="0 == 1">0</span> |
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561 ... <span py:when="1 == 1">1</span> |
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562 ... <span py:otherwise="">2</span> |
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563 ... </div>''') |
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564 >>> print tmpl.generate() |
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565 <div> |
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566 <span>1</span> |
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567 </div> |
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568 |
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569 If the `py:choose` directive contains an expression, the nested `py:when` |
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570 directives are tested for equality to the `py:choose` expression: |
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571 |
61 | 572 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/" |
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573 ... py:choose="2"> |
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574 ... <span py:when="1">1</span> |
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575 ... <span py:when="2">2</span> |
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576 ... </div>''') |
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577 >>> print tmpl.generate() |
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578 <div> |
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579 <span>2</span> |
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580 </div> |
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581 |
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582 Behavior is undefined if a `py:choose` block contains content outside a |
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583 `py:when` or `py:otherwise` block. Behavior is also undefined if a |
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584 `py:otherwise` occurs before `py:when` blocks. |
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585 """ |
50
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586 __slots__ = ['matched', 'value'] |
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587 |
65
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588 ATTRIBUTE = 'test' |
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589 |
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590 def __call__(self, stream, ctxt, directives): |
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591 if self.expr: |
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592 self.value = self.expr.evaluate(ctxt) |
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593 self.matched = False |
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594 ctxt.push(dict(_choose=self)) |
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595 for event in _apply_directives(stream, ctxt, directives): |
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596 yield event |
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597 ctxt.pop() |
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598 |
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599 |
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600 class WhenDirective(Directive): |
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601 """Implementation of the `py:when` directive for nesting in a parent with |
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602 the `py:choose` directive. |
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603 |
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604 See the documentation of `py:choose` for usage. |
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605 """ |
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606 |
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607 ATTRIBUTE = 'test' |
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608 |
54 | 609 def __call__(self, stream, ctxt, directives): |
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610 choose = ctxt['_choose'] |
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611 if not choose: |
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612 raise TemplateSyntaxError('"when" directives can only be used ' |
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613 'inside a "choose" directive', |
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614 *stream.next()[2]) |
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615 if choose.matched: |
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616 return [] |
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617 if not self.expr: |
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618 raise TemplateSyntaxError('"when" directive has no test condition', |
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619 *stream.next()[2]) |
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620 value = self.expr.evaluate(ctxt) |
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621 try: |
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622 if value == choose.value: |
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623 choose.matched = True |
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624 return _apply_directives(stream, ctxt, directives) |
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625 except AttributeError: |
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626 if value: |
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627 choose.matched = True |
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628 return _apply_directives(stream, ctxt, directives) |
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629 return [] |
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630 |
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631 |
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632 class OtherwiseDirective(Directive): |
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633 """Implementation of the `py:otherwise` directive for nesting in a parent |
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634 with the `py:choose` directive. |
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635 |
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636 See the documentation of `py:choose` for usage. |
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637 """ |
54 | 638 def __call__(self, stream, ctxt, directives): |
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639 choose = ctxt['_choose'] |
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640 if not choose: |
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641 raise TemplateSyntaxError('an "otherwise" directive can only be ' |
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642 'used inside a "choose" directive', |
166
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Better error reporting for errors in directive expressions, and when `py:otherwise`/`py:when` are used outside a `py:choose` directive. Thanks to Christian Boos for the initial patch.
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643 *stream.next()[2]) |
44
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644 if choose.matched: |
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645 return [] |
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646 choose.matched = True |
78
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Minor improvements to how directives are applied in template processing.
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647 return _apply_directives(stream, ctxt, directives) |
44
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648 |
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649 |
104
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650 class WithDirective(Directive): |
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651 """Implementation of the `py:with` template directive, which allows |
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652 shorthand access to variables and expressions. |
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653 |
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654 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
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655 ... <span py:with="y=7; z=x+10">$x $y $z</span> |
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656 ... </div>''') |
149
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657 >>> print tmpl.generate(x=42) |
104
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658 <div> |
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659 <span>42 7 52</span> |
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660 </div> |
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661 """ |
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662 __slots__ = ['vars'] |
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663 |
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664 ATTRIBUTE = 'vars' |
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665 |
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666 def __init__(self, value, filename=None, lineno=-1, offset=-1): |
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667 Directive.__init__(self, None, filename, lineno, offset) |
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668 self.vars = [] |
190 | 669 value = value.strip() |
104
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670 try: |
190 | 671 ast = compiler.parse(value, 'exec').node |
672 for node in ast.nodes: | |
673 if isinstance(node, compiler.ast.Discard): | |
674 continue | |
675 elif not isinstance(node, compiler.ast.Assign): | |
676 raise TemplateSyntaxError('only assignment allowed in ' | |
677 'value of the "with" directive', | |
678 filename, lineno, offset) | |
679 self.vars.append(([n.name for n in node.nodes], | |
680 Expression(node.expr, filename, lineno))) | |
104
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681 except SyntaxError, err: |
190 | 682 err.msg += ' in expression "%s" of "%s" directive' % (value, |
683 self.tagname) | |
104
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684 raise TemplateSyntaxError(err, filename, lineno, |
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685 offset + (err.offset or 0)) |
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686 |
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687 def __call__(self, stream, ctxt, directives): |
190 | 688 frame = {} |
689 ctxt.push(frame) | |
690 for names, expr in self.vars: | |
691 value = expr.evaluate(ctxt, nocall=True) | |
193
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Fix for Python 2.3 compatibility in `py:with` directive (regression in [240]).
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692 frame.update(dict([(name, value) for name in names])) |
104
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693 for event in _apply_directives(stream, ctxt, directives): |
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694 yield event |
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695 ctxt.pop() |
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696 |
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697 def __repr__(self): |
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698 return '<%s "%s">' % (self.__class__.__name__, |
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699 '; '.join(['%s = %s' % (name, expr.source) |
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700 for name, expr in self.vars])) |
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701 |
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702 |
1 | 703 class Template(object): |
704 """Can parse a template and transform it into the corresponding output | |
705 based on context data. | |
706 """ | |
61 | 707 NAMESPACE = Namespace('http://markup.edgewall.org/') |
1 | 708 |
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
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diff
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709 EXPR = StreamEventKind('EXPR') # an expression |
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Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
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diff
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|
710 SUB = StreamEventKind('SUB') # a "subprogram" |
10
c5890ef863ba
Moved the template-specific stream event kinds into the template module.
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|
711 |
1 | 712 directives = [('def', DefDirective), |
713 ('match', MatchDirective), | |
120 | 714 ('when', WhenDirective), |
715 ('otherwise', OtherwiseDirective), | |
1 | 716 ('for', ForDirective), |
717 ('if', IfDirective), | |
53
60f1a556690e
* Add helper function to let directives apply any remaining directives, and use that helper consistently in every directive.
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|
718 ('choose', ChooseDirective), |
104
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Added `py:with` directive based on Jonas' patch in #17.
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719 ('with', WithDirective), |
1 | 720 ('replace', ReplaceDirective), |
721 ('content', ContentDirective), | |
722 ('attrs', AttrsDirective), | |
50
a053ffb834cb
Fix the way multiple directives are applied to a single `SUB` in many cases by making the directives themselves responsible for applying any remaining directives.
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723 ('strip', StripDirective)] |
1 | 724 _dir_by_name = dict(directives) |
725 _dir_order = [directive[1] for directive in directives] | |
726 | |
21
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* Include paths are now interpreted relative to the path of the including template. Closes #3.
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727 def __init__(self, source, basedir=None, filename=None): |
1 | 728 """Initialize a template from either a string or a file-like object.""" |
729 if isinstance(source, basestring): | |
730 self.source = StringIO(source) | |
731 else: | |
732 self.source = source | |
21
eca77129518a
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733 self.basedir = basedir |
172
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Fix for #30 (trouble using `py:def`inside a match template)
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734 self.filename = filename |
21
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* Include paths are now interpreted relative to the path of the including template. Closes #3.
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diff
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735 if basedir and filename: |
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* Include paths are now interpreted relative to the path of the including template. Closes #3.
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736 self.filepath = os.path.join(basedir, filename) |
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* Include paths are now interpreted relative to the path of the including template. Closes #3.
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737 else: |
172
4b4e80b2b0b5
Fix for #30 (trouble using `py:def`inside a match template)
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738 self.filepath = None |
1 | 739 |
23
00835401c8cc
Separate match and eval filters from the include and user-supplied filters.
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diff
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|
740 self.filters = [] |
1 | 741 self.parse() |
742 | |
743 def __repr__(self): | |
21
eca77129518a
* Include paths are now interpreted relative to the path of the including template. Closes #3.
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diff
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744 return '<%s "%s">' % (self.__class__.__name__, self.filename) |
1 | 745 |
746 def parse(self): | |
747 """Parse the template. | |
748 | |
749 The parsing stage parses the XML template and constructs a list of | |
750 directives that will be executed in the render stage. The input is | |
751 split up into literal output (markup that does not depend on the | |
752 context data) and actual directives (commands or variable | |
753 substitution). | |
754 """ | |
755 stream = [] # list of events of the "compiled" template | |
756 dirmap = {} # temporary mapping of directives to elements | |
757 ns_prefix = {} | |
758 depth = 0 | |
759 | |
21
eca77129518a
* Include paths are now interpreted relative to the path of the including template. Closes #3.
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760 for kind, data, pos in XMLParser(self.source, filename=self.filename): |
1 | 761 |
69 | 762 if kind is START_NS: |
1 | 763 # Strip out the namespace declaration for template directives |
764 prefix, uri = data | |
765 if uri == self.NAMESPACE: | |
766 ns_prefix[prefix] = uri | |
767 else: | |
768 stream.append((kind, data, pos)) | |
769 | |
69 | 770 elif kind is END_NS: |
1 | 771 if data in ns_prefix: |
772 del ns_prefix[data] | |
773 else: | |
774 stream.append((kind, data, pos)) | |
775 | |
69 | 776 elif kind is START: |
1 | 777 # Record any directive attributes in start tags |
778 tag, attrib = data | |
779 directives = [] | |
65
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780 strip = False |
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781 |
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782 if tag in self.NAMESPACE: |
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Support the use of directives as elements to reduce the need for using `py:strip`.
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783 cls = self._dir_by_name.get(tag.localname) |
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784 if cls is None: |
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|
785 raise BadDirectiveError(tag, pos[0], pos[1]) |
66
822089ae65ce
Switch copyright to Edgewall and URLs to markup.edgewall.org.
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65
diff
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|
786 value = attrib.get(getattr(cls, 'ATTRIBUTE', None), '') |
81
cc034182061e
Template expressions are now compiled to Python bytecode.
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787 directives.append(cls(value, *pos)) |
65
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788 strip = True |
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789 |
1 | 790 new_attrib = [] |
791 for name, value in attrib: | |
18
4cbebb15a834
Actually make use of the `markup.core.Namespace` class, and add a couple of doctests.
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diff
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|
792 if name in self.NAMESPACE: |
1 | 793 cls = self._dir_by_name.get(name.localname) |
794 if cls is None: | |
65
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Support the use of directives as elements to reduce the need for using `py:strip`.
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795 raise BadDirectiveError(name, pos[0], pos[1]) |
81
cc034182061e
Template expressions are now compiled to Python bytecode.
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|
796 directives.append(cls(value, *pos)) |
1 | 797 else: |
75
c3c26300a46d
Empty attributes in templates were being stripped out. Thanks to Jonas for the patch.
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798 if value: |
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Empty attributes in templates were being stripped out. Thanks to Jonas for the patch.
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799 value = list(self._interpolate(value, *pos)) |
81
cc034182061e
Template expressions are now compiled to Python bytecode.
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800 if len(value) == 1 and value[0][0] is TEXT: |
cc034182061e
Template expressions are now compiled to Python bytecode.
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diff
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|
801 value = value[0][1] |
75
c3c26300a46d
Empty attributes in templates were being stripped out. Thanks to Jonas for the patch.
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802 else: |
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Empty attributes in templates were being stripped out. Thanks to Jonas for the patch.
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803 value = [(TEXT, u'', pos)] |
1 | 804 new_attrib.append((name, value)) |
65
5c024cf58ecb
Support the use of directives as elements to reduce the need for using `py:strip`.
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805 |
1 | 806 if directives: |
50
a053ffb834cb
Fix the way multiple directives are applied to a single `SUB` in many cases by making the directives themselves responsible for applying any remaining directives.
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diff
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807 directives.sort(lambda a, b: cmp(self._dir_order.index(a.__class__), |
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Fix the way multiple directives are applied to a single `SUB` in many cases by making the directives themselves responsible for applying any remaining directives.
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808 self._dir_order.index(b.__class__))) |
65
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diff
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|
809 dirmap[(depth, tag)] = (directives, len(stream), strip) |
1 | 810 |
182
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Renamed `Attributes` to `Attrs` to reduce the verbosity.
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811 stream.append((kind, (tag, Attrs(new_attrib)), pos)) |
1 | 812 depth += 1 |
813 | |
69 | 814 elif kind is END: |
1 | 815 depth -= 1 |
816 stream.append((kind, data, pos)) | |
817 | |
818 # If there have have directive attributes with the corresponding | |
819 # start tag, move the events inbetween into a "subprogram" | |
820 if (depth, data) in dirmap: | |
65
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821 directives, start_offset, strip = dirmap.pop((depth, data)) |
1 | 822 substream = stream[start_offset:] |
65
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823 if strip: |
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diff
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824 substream = substream[1:-1] |
69 | 825 stream[start_offset:] = [(SUB, (directives, substream), |
826 pos)] | |
1 | 827 |
69 | 828 elif kind is TEXT: |
1 | 829 for kind, data, pos in self._interpolate(data, *pos): |
830 stream.append((kind, data, pos)) | |
831 | |
89
d4c7617900e3
Support comments in templates that are not included in the output, in the same way Kid does: if the comment text starts with a `!` character, it is stripped from the output.
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87
diff
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832 elif kind is COMMENT: |
d4c7617900e3
Support comments in templates that are not included in the output, in the same way Kid does: if the comment text starts with a `!` character, it is stripped from the output.
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833 if not data.lstrip().startswith('!'): |
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Support comments in templates that are not included in the output, in the same way Kid does: if the comment text starts with a `!` character, it is stripped from the output.
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834 stream.append((kind, data, pos)) |
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Support comments in templates that are not included in the output, in the same way Kid does: if the comment text starts with a `!` character, it is stripped from the output.
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835 |
1 | 836 else: |
837 stream.append((kind, data, pos)) | |
838 | |
839 self.stream = stream | |
840 | |
184
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Interpolate multiline expressions in templates. Thanks to Christian Boos for reporting the problem and providing the fix.
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841 _FULL_EXPR_RE = re.compile(r'(?<!\$)\$\{(.+?)\}', re.DOTALL) |
1 | 842 _SHORT_EXPR_RE = re.compile(r'(?<!\$)\$([a-zA-Z][a-zA-Z0-9_\.]*)') |
843 | |
21
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* Include paths are now interpreted relative to the path of the including template. Closes #3.
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844 def _interpolate(cls, text, filename=None, lineno=-1, offset=-1): |
1 | 845 """Parse the given string and extract expressions. |
846 | |
847 This method returns a list containing both literal text and `Expression` | |
848 objects. | |
14
76b5d4b189e6
The `<py:match>` directive now protects itself against simple infinite recursion (see MatchDirective), while still allowing recursion in general.
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diff
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|
849 |
1 | 850 @param text: the text to parse |
851 @param lineno: the line number at which the text was found (optional) | |
852 @param offset: the column number at which the text starts in the source | |
853 (optional) | |
854 """ | |
134
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* Improve the accuracy of line numbers for text nodes, so that reported errors about syntax or evaluation errors in expressions point to the right line (not quite perfect yet, though).
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855 def _interpolate(text, patterns, filename=filename, lineno=lineno, |
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* Improve the accuracy of line numbers for text nodes, so that reported errors about syntax or evaluation errors in expressions point to the right line (not quite perfect yet, though).
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856 offset=offset): |
191
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Allow leading whitespace in expressions. Closes #38. Thanks to Christian Boos for the patch!
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changeset
|
857 for idx, grp in enumerate(patterns.pop(0).split(text)): |
1 | 858 if idx % 2: |
81
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
859 try: |
191
929ef2913b87
Allow leading whitespace in expressions. Closes #38. Thanks to Christian Boos for the patch!
cmlenz
parents:
190
diff
changeset
|
860 yield EXPR, Expression(grp.strip(), filename, lineno), \ |
134
df44110ca91d
* Improve the accuracy of line numbers for text nodes, so that reported errors about syntax or evaluation errors in expressions point to the right line (not quite perfect yet, though).
cmlenz
parents:
133
diff
changeset
|
861 (filename, lineno, offset) |
81
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
862 except SyntaxError, err: |
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
863 raise TemplateSyntaxError(err, filename, lineno, |
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
864 offset + (err.offset or 0)) |
191
929ef2913b87
Allow leading whitespace in expressions. Closes #38. Thanks to Christian Boos for the patch!
cmlenz
parents:
190
diff
changeset
|
865 elif grp: |
1 | 866 if patterns: |
191
929ef2913b87
Allow leading whitespace in expressions. Closes #38. Thanks to Christian Boos for the patch!
cmlenz
parents:
190
diff
changeset
|
867 for result in _interpolate(grp, patterns[:]): |
1 | 868 yield result |
869 else: | |
191
929ef2913b87
Allow leading whitespace in expressions. Closes #38. Thanks to Christian Boos for the patch!
cmlenz
parents:
190
diff
changeset
|
870 yield TEXT, grp.replace('$$', '$'), \ |
134
df44110ca91d
* Improve the accuracy of line numbers for text nodes, so that reported errors about syntax or evaluation errors in expressions point to the right line (not quite perfect yet, though).
cmlenz
parents:
133
diff
changeset
|
871 (filename, lineno, offset) |
191
929ef2913b87
Allow leading whitespace in expressions. Closes #38. Thanks to Christian Boos for the patch!
cmlenz
parents:
190
diff
changeset
|
872 if '\n' in grp: |
929ef2913b87
Allow leading whitespace in expressions. Closes #38. Thanks to Christian Boos for the patch!
cmlenz
parents:
190
diff
changeset
|
873 lines = grp.splitlines() |
134
df44110ca91d
* Improve the accuracy of line numbers for text nodes, so that reported errors about syntax or evaluation errors in expressions point to the right line (not quite perfect yet, though).
cmlenz
parents:
133
diff
changeset
|
874 lineno += len(lines) - 1 |
df44110ca91d
* Improve the accuracy of line numbers for text nodes, so that reported errors about syntax or evaluation errors in expressions point to the right line (not quite perfect yet, though).
cmlenz
parents:
133
diff
changeset
|
875 offset += len(lines[-1]) |
df44110ca91d
* Improve the accuracy of line numbers for text nodes, so that reported errors about syntax or evaluation errors in expressions point to the right line (not quite perfect yet, though).
cmlenz
parents:
133
diff
changeset
|
876 else: |
191
929ef2913b87
Allow leading whitespace in expressions. Closes #38. Thanks to Christian Boos for the patch!
cmlenz
parents:
190
diff
changeset
|
877 offset += len(grp) |
74
3c271699c398
Fix expression interpolation where both shorthand notation and full notation are used inside a single text node. Thanks Jonas.
cmlenz
parents:
73
diff
changeset
|
878 return _interpolate(text, [cls._FULL_EXPR_RE, cls._SHORT_EXPR_RE]) |
1 | 879 _interpolate = classmethod(_interpolate) |
880 | |
149
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
cmlenz
parents:
145
diff
changeset
|
881 def generate(self, *args, **kwargs): |
29
4b6cee37ce62
* Minor simplification of template directives: they no longer get passed the template instance and the position, as no directive was actually using
cmlenz
parents:
27
diff
changeset
|
882 """Apply the template to the given context data. |
4b6cee37ce62
* Minor simplification of template directives: they no longer get passed the template instance and the position, as no directive was actually using
cmlenz
parents:
27
diff
changeset
|
883 |
149
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
cmlenz
parents:
145
diff
changeset
|
884 Any keyword arguments are made available to the template as context |
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
cmlenz
parents:
145
diff
changeset
|
885 data. |
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
cmlenz
parents:
145
diff
changeset
|
886 |
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
cmlenz
parents:
145
diff
changeset
|
887 Only one positional argument is accepted: if it is provided, it must be |
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
cmlenz
parents:
145
diff
changeset
|
888 an instance of the `Context` class, and keyword arguments are ignored. |
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
cmlenz
parents:
145
diff
changeset
|
889 This calling style is used for internal processing. |
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
cmlenz
parents:
145
diff
changeset
|
890 |
29
4b6cee37ce62
* Minor simplification of template directives: they no longer get passed the template instance and the position, as no directive was actually using
cmlenz
parents:
27
diff
changeset
|
891 @return: a markup event stream representing the result of applying |
4b6cee37ce62
* Minor simplification of template directives: they no longer get passed the template instance and the position, as no directive was actually using
cmlenz
parents:
27
diff
changeset
|
892 the template to the context data. |
4b6cee37ce62
* Minor simplification of template directives: they no longer get passed the template instance and the position, as no directive was actually using
cmlenz
parents:
27
diff
changeset
|
893 """ |
149
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
cmlenz
parents:
145
diff
changeset
|
894 if args: |
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
cmlenz
parents:
145
diff
changeset
|
895 assert len(args) == 1 |
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
cmlenz
parents:
145
diff
changeset
|
896 ctxt = args[0] |
173 | 897 if ctxt is None: |
898 ctxt = Context(**kwargs) | |
149
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
cmlenz
parents:
145
diff
changeset
|
899 assert isinstance(ctxt, Context) |
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
cmlenz
parents:
145
diff
changeset
|
900 else: |
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
cmlenz
parents:
145
diff
changeset
|
901 ctxt = Context(**kwargs) |
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
902 |
69 | 903 stream = self.stream |
904 for filter_ in [self._eval, self._match, self._flatten] + self.filters: | |
35
3bc4778787c5
Simplify template processing model by removing dynamically generated `SUB` events.
cmlenz
parents:
31
diff
changeset
|
905 stream = filter_(iter(stream), ctxt) |
3bc4778787c5
Simplify template processing model by removing dynamically generated `SUB` events.
cmlenz
parents:
31
diff
changeset
|
906 return Stream(stream) |
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
907 |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
908 def _eval(self, stream, ctxt=None): |
29
4b6cee37ce62
* Minor simplification of template directives: they no longer get passed the template instance and the position, as no directive was actually using
cmlenz
parents:
27
diff
changeset
|
909 """Internal stream filter that evaluates any expressions in `START` and |
4b6cee37ce62
* Minor simplification of template directives: they no longer get passed the template instance and the position, as no directive was actually using
cmlenz
parents:
27
diff
changeset
|
910 `TEXT` events. |
4b6cee37ce62
* Minor simplification of template directives: they no longer get passed the template instance and the position, as no directive was actually using
cmlenz
parents:
27
diff
changeset
|
911 """ |
172
4b4e80b2b0b5
Fix for #30 (trouble using `py:def`inside a match template)
cmlenz
parents:
166
diff
changeset
|
912 filters = (self._eval, self._match, self._flatten) |
81
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
913 |
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
914 for kind, data, pos in stream: |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
915 |
81
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
916 if kind is START and data[1]: |
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
917 # Attributes may still contain expressions in start tags at |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
918 # this point, so do some evaluation |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
919 tag, attrib = data |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
920 new_attrib = [] |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
921 for name, substream in attrib: |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
922 if isinstance(substream, basestring): |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
923 value = substream |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
924 else: |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
925 values = [] |
185
8e5a3048b359
Fix for #34: `py:def` macros can now be invoked from within expressions in attribute values.
cmlenz
parents:
184
diff
changeset
|
926 for subkind, subdata, subpos in self._eval(substream, |
8e5a3048b359
Fix for #34: `py:def` macros can now be invoked from within expressions in attribute values.
cmlenz
parents:
184
diff
changeset
|
927 ctxt): |
8e5a3048b359
Fix for #34: `py:def` macros can now be invoked from within expressions in attribute values.
cmlenz
parents:
184
diff
changeset
|
928 if subkind is TEXT: |
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
929 values.append(subdata) |
185
8e5a3048b359
Fix for #34: `py:def` macros can now be invoked from within expressions in attribute values.
cmlenz
parents:
184
diff
changeset
|
930 value = [x for x in values if x is not None] |
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
931 if not value: |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
932 continue |
23
00835401c8cc
Separate match and eval filters from the include and user-supplied filters.
cmlenz
parents:
22
diff
changeset
|
933 new_attrib.append((name, u''.join(value))) |
182
41db0260ebb1
Renamed `Attributes` to `Attrs` to reduce the verbosity.
cmlenz
parents:
181
diff
changeset
|
934 yield kind, (tag, Attrs(new_attrib)), pos |
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
935 |
69 | 936 elif kind is EXPR: |
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
937 result = data.evaluate(ctxt) |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
938 if result is None: |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
939 continue |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
940 |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
941 # First check for a string, otherwise the iterable test below |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
942 # succeeds, and the string will be chopped up into individual |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
943 # characters |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
944 if isinstance(result, basestring): |
69 | 945 yield TEXT, result, pos |
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
946 else: |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
947 # Test if the expression evaluated to an iterable, in which |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
948 # case we yield the individual items |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
949 try: |
111
8a4d9064f363
Some fixes and more unit tests for the XPath engine.
cmlenz
parents:
104
diff
changeset
|
950 substream = _ensure(result) |
81
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
951 for filter_ in filters: |
77
f1aa49c759b2
* Simplify implementation of the individual XPath tests (use closures instead of callable classes)
cmlenz
parents:
75
diff
changeset
|
952 substream = filter_(substream, ctxt) |
f1aa49c759b2
* Simplify implementation of the individual XPath tests (use closures instead of callable classes)
cmlenz
parents:
75
diff
changeset
|
953 for event in substream: |
35
3bc4778787c5
Simplify template processing model by removing dynamically generated `SUB` events.
cmlenz
parents:
31
diff
changeset
|
954 yield event |
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
955 except TypeError: |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
956 # Neither a string nor an iterable, so just pass it |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
957 # through |
69 | 958 yield TEXT, unicode(result), pos |
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
959 |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
960 else: |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
961 yield kind, data, pos |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
962 |
23
00835401c8cc
Separate match and eval filters from the include and user-supplied filters.
cmlenz
parents:
22
diff
changeset
|
963 def _flatten(self, stream, ctxt=None): |
29
4b6cee37ce62
* Minor simplification of template directives: they no longer get passed the template instance and the position, as no directive was actually using
cmlenz
parents:
27
diff
changeset
|
964 """Internal stream filter that expands `SUB` events in the stream.""" |
81
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
965 for kind, data, pos in stream: |
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
966 if kind is SUB: |
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
967 # This event is a list of directives and a list of nested |
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
968 # events to which those directives should be applied |
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
969 directives, substream = data |
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
970 substream = _apply_directives(substream, ctxt, directives) |
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
971 for filter_ in (self._eval, self._match, self._flatten): |
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
972 substream = filter_(substream, ctxt) |
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
973 for event in substream: |
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
974 yield event |
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
975 else: |
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
976 yield kind, data, pos |
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
977 |
36
57d607f25484
Fix for #7: match templates no longer process their own output.
cmlenz
parents:
35
diff
changeset
|
978 def _match(self, stream, ctxt=None, match_templates=None): |
29
4b6cee37ce62
* Minor simplification of template directives: they no longer get passed the template instance and the position, as no directive was actually using
cmlenz
parents:
27
diff
changeset
|
979 """Internal stream filter that applies any defined match templates |
4b6cee37ce62
* Minor simplification of template directives: they no longer get passed the template instance and the position, as no directive was actually using
cmlenz
parents:
27
diff
changeset
|
980 to the stream. |
4b6cee37ce62
* Minor simplification of template directives: they no longer get passed the template instance and the position, as no directive was actually using
cmlenz
parents:
27
diff
changeset
|
981 """ |
36
57d607f25484
Fix for #7: match templates no longer process their own output.
cmlenz
parents:
35
diff
changeset
|
982 if match_templates is None: |
57d607f25484
Fix for #7: match templates no longer process their own output.
cmlenz
parents:
35
diff
changeset
|
983 match_templates = ctxt._match_templates |
57d607f25484
Fix for #7: match templates no longer process their own output.
cmlenz
parents:
35
diff
changeset
|
984 |
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
985 for kind, data, pos in stream: |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
986 |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
987 # We (currently) only care about start and end events for matching |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
988 # We might care about namespace events in the future, though |
92
3b75c6730b29
More performance improvements... this time for whitespace normalization and template loops.
cmlenz
parents:
90
diff
changeset
|
989 if not match_templates or kind not in (START, END): |
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
990 yield kind, data, pos |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
991 continue |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
992 |
50
a053ffb834cb
Fix the way multiple directives are applied to a single `SUB` in many cases by making the directives themselves responsible for applying any remaining directives.
cmlenz
parents:
48
diff
changeset
|
993 for idx, (test, path, template, directives) in \ |
a053ffb834cb
Fix the way multiple directives are applied to a single `SUB` in many cases by making the directives themselves responsible for applying any remaining directives.
cmlenz
parents:
48
diff
changeset
|
994 enumerate(match_templates): |
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
995 |
179
a2e0a7986d19
Implemented support for XPath variables in predicates (#31).
cmlenz
parents:
176
diff
changeset
|
996 if test(kind, data, pos, ctxt) is True: |
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
997 # Consume and store all events until an end event |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
998 # corresponding to this start event is encountered |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
999 content = [(kind, data, pos)] |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
1000 depth = 1 |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
1001 while depth > 0: |
73 | 1002 kind, data, pos = stream.next() |
1003 if kind is START: | |
1004 depth += 1 | |
1005 elif kind is END: | |
1006 depth -= 1 | |
1007 content.append((kind, data, pos)) | |
179
a2e0a7986d19
Implemented support for XPath variables in predicates (#31).
cmlenz
parents:
176
diff
changeset
|
1008 test(kind, data, pos, ctxt) |
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
1009 |
23
00835401c8cc
Separate match and eval filters from the include and user-supplied filters.
cmlenz
parents:
22
diff
changeset
|
1010 content = list(self._flatten(content, ctxt)) |
95
7d6426183a90
Improve performance of push/pop operations on the context.
cmlenz
parents:
93
diff
changeset
|
1011 select = lambda path: Stream(content).select(path) |
7d6426183a90
Improve performance of push/pop operations on the context.
cmlenz
parents:
93
diff
changeset
|
1012 ctxt.push(dict(select=select)) |
36
57d607f25484
Fix for #7: match templates no longer process their own output.
cmlenz
parents:
35
diff
changeset
|
1013 |
78
fa4bafcbe4c7
Minor improvements to how directives are applied in template processing.
cmlenz
parents:
77
diff
changeset
|
1014 template = _apply_directives(template, ctxt, directives) |
69 | 1015 for event in self._match(self._eval(template, ctxt), |
1016 ctxt, match_templates[:idx] + | |
1017 match_templates[idx + 1:]): | |
35
3bc4778787c5
Simplify template processing model by removing dynamically generated `SUB` events.
cmlenz
parents:
31
diff
changeset
|
1018 yield event |
116 | 1019 |
35
3bc4778787c5
Simplify template processing model by removing dynamically generated `SUB` events.
cmlenz
parents:
31
diff
changeset
|
1020 ctxt.pop() |
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
1021 break |
69 | 1022 |
1023 else: # no matches | |
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
1024 yield kind, data, pos |
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
1025 |
1 | 1026 |
69 | 1027 EXPR = Template.EXPR |
1028 SUB = Template.SUB | |
1029 | |
1030 | |
1 | 1031 class TemplateLoader(object): |
1032 """Responsible for loading templates from files on the specified search | |
1033 path. | |
1034 | |
1035 >>> import tempfile | |
1036 >>> fd, path = tempfile.mkstemp(suffix='.html', prefix='template') | |
1037 >>> os.write(fd, '<p>$var</p>') | |
1038 11 | |
1039 >>> os.close(fd) | |
1040 | |
1041 The template loader accepts a list of directory paths that are then used | |
1042 when searching for template files, in the given order: | |
1043 | |
1044 >>> loader = TemplateLoader([os.path.dirname(path)]) | |
1045 | |
1046 The `load()` method first checks the template cache whether the requested | |
1047 template has already been loaded. If not, it attempts to locate the | |
1048 template file, and returns the corresponding `Template` object: | |
1049 | |
1050 >>> template = loader.load(os.path.basename(path)) | |
1051 >>> isinstance(template, Template) | |
1052 True | |
1053 | |
1054 Template instances are cached: requesting a template with the same name | |
1055 results in the same instance being returned: | |
1056 | |
1057 >>> loader.load(os.path.basename(path)) is template | |
1058 True | |
152
064ba1078f92
Add some tests for relative template includes (see #27).
cmlenz
parents:
150
diff
changeset
|
1059 |
064ba1078f92
Add some tests for relative template includes (see #27).
cmlenz
parents:
150
diff
changeset
|
1060 >>> os.remove(path) |
1 | 1061 """ |
1062 def __init__(self, search_path=None, auto_reload=False): | |
1063 """Create the template laoder. | |
1064 | |
1065 @param search_path: a list of absolute path names that should be | |
1066 searched for template files | |
1067 @param auto_reload: whether to check the last modification time of | |
1068 template files, and reload them if they have changed | |
1069 """ | |
1070 self.search_path = search_path | |
1071 if self.search_path is None: | |
1072 self.search_path = [] | |
1073 self.auto_reload = auto_reload | |
1074 self._cache = {} | |
1075 self._mtime = {} | |
1076 | |
21
eca77129518a
* Include paths are now interpreted relative to the path of the including template. Closes #3.
cmlenz
parents:
18
diff
changeset
|
1077 def load(self, filename, relative_to=None): |
1 | 1078 """Load the template with the given name. |
1079 | |
22
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1080 If the `filename` parameter is relative, this method searches the search |
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1081 path trying to locate a template matching the given name. If the file |
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1082 name is an absolute path, the search path is not bypassed. |
1 | 1083 |
22
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1084 If requested template is not found, a `TemplateNotFound` exception is |
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1085 raised. Otherwise, a `Template` object is returned that represents the |
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1086 parsed template. |
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1087 |
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1088 Template instances are cached to avoid having to parse the same |
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1089 template file more than once. Thus, subsequent calls of this method |
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1090 with the same template file name will return the same `Template` |
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1091 object (unless the `auto_reload` option is enabled and the file was |
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1092 changed since the last parse.) |
1 | 1093 |
21
eca77129518a
* Include paths are now interpreted relative to the path of the including template. Closes #3.
cmlenz
parents:
18
diff
changeset
|
1094 If the `relative_to` parameter is provided, the `filename` is |
eca77129518a
* Include paths are now interpreted relative to the path of the including template. Closes #3.
cmlenz
parents:
18
diff
changeset
|
1095 interpreted as being relative to that path. |
eca77129518a
* Include paths are now interpreted relative to the path of the including template. Closes #3.
cmlenz
parents:
18
diff
changeset
|
1096 |
1 | 1097 @param filename: the relative path of the template file to load |
21
eca77129518a
* Include paths are now interpreted relative to the path of the including template. Closes #3.
cmlenz
parents:
18
diff
changeset
|
1098 @param relative_to: the filename of the template from which the new |
eca77129518a
* Include paths are now interpreted relative to the path of the including template. Closes #3.
cmlenz
parents:
18
diff
changeset
|
1099 template is being loaded, or `None` if the template is being loaded |
eca77129518a
* Include paths are now interpreted relative to the path of the including template. Closes #3.
cmlenz
parents:
18
diff
changeset
|
1100 directly |
1 | 1101 """ |
69 | 1102 from markup.filters import IncludeFilter |
1103 | |
21
eca77129518a
* Include paths are now interpreted relative to the path of the including template. Closes #3.
cmlenz
parents:
18
diff
changeset
|
1104 if relative_to: |
153 | 1105 filename = os.path.join(os.path.dirname(relative_to), filename) |
1 | 1106 filename = os.path.normpath(filename) |
22
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1107 |
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1108 # First check the cache to avoid reparsing the same file |
1 | 1109 try: |
1110 tmpl = self._cache[filename] | |
1111 if not self.auto_reload or \ | |
21
eca77129518a
* Include paths are now interpreted relative to the path of the including template. Closes #3.
cmlenz
parents:
18
diff
changeset
|
1112 os.path.getmtime(tmpl.filepath) == self._mtime[filename]: |
1 | 1113 return tmpl |
1114 except KeyError: | |
1115 pass | |
22
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1116 |
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1117 # Bypass the search path if the filename is absolute |
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1118 search_path = self.search_path |
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1119 if os.path.isabs(filename): |
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1120 search_path = [os.path.dirname(filename)] |
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1121 |
176
7efcbf6b1cf2
Fix control flow for error message when template search path is empty.
cmlenz
parents:
175
diff
changeset
|
1122 if not search_path: |
7efcbf6b1cf2
Fix control flow for error message when template search path is empty.
cmlenz
parents:
175
diff
changeset
|
1123 raise TemplateError('Search path for templates not configured') |
7efcbf6b1cf2
Fix control flow for error message when template search path is empty.
cmlenz
parents:
175
diff
changeset
|
1124 |
22
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1125 for dirname in search_path: |
1 | 1126 filepath = os.path.join(dirname, filename) |
1127 try: | |
133
b9a0031d4bbb
Minor cleanup and performance improvement for the builder module.
cmlenz
parents:
120
diff
changeset
|
1128 fileobj = open(filepath, 'U') |
1 | 1129 try: |
21
eca77129518a
* Include paths are now interpreted relative to the path of the including template. Closes #3.
cmlenz
parents:
18
diff
changeset
|
1130 tmpl = Template(fileobj, basedir=dirname, filename=filename) |
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
1131 tmpl.filters.append(IncludeFilter(self)) |
1 | 1132 finally: |
1133 fileobj.close() | |
1134 self._cache[filename] = tmpl | |
1135 self._mtime[filename] = os.path.getmtime(filepath) | |
1136 return tmpl | |
1137 except IOError: | |
1138 continue | |
175 | 1139 |
1 | 1140 raise TemplateNotFound(filename, self.search_path) |