Mercurial > genshi > genshi-test
annotate markup/template.py @ 99:04c8ed3c43ff
Trac port is now in the Trac repository (http://trac.edgewall.org/browser/sandbox/markup).
| author | cmlenz |
|---|---|
| date | Fri, 21 Jul 2006 21:43:29 +0000 |
| parents | 7d6426183a90 |
| children | ef6794139671 |
| rev | line source |
|---|---|
| 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 | |
|
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24 import posixpath |
| 1 | 25 import re |
| 26 from StringIO import StringIO | |
| 27 | |
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28 from markup.core import Attributes, Namespace, Stream, StreamEventKind |
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29 from markup.core import START, END, START_NS, END_NS, TEXT, COMMENT |
| 1 | 30 from markup.eval import Expression |
| 69 | 31 from markup.input import XMLParser |
|
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32 from markup.path import Path |
| 1 | 33 |
| 34 __all__ = ['Context', 'BadDirectiveError', 'TemplateError', | |
| 35 'TemplateSyntaxError', 'TemplateNotFound', 'Template', | |
| 36 'TemplateLoader'] | |
| 37 | |
| 38 | |
| 39 class TemplateError(Exception): | |
| 40 """Base exception class for errors related to template processing.""" | |
| 41 | |
| 42 | |
| 43 class TemplateSyntaxError(TemplateError): | |
| 44 """Exception raised when an expression in a template causes a Python syntax | |
| 45 error.""" | |
| 46 | |
| 47 def __init__(self, message, filename='<string>', lineno=-1, offset=-1): | |
| 48 if isinstance(message, SyntaxError) and message.lineno is not None: | |
| 49 message = str(message).replace(' (line %d)' % message.lineno, '') | |
| 80 | 50 message = '%s (%s, line %d)' % (message, filename, lineno) |
| 1 | 51 TemplateError.__init__(self, message) |
| 52 self.filename = filename | |
| 53 self.lineno = lineno | |
| 54 self.offset = offset | |
| 55 | |
| 56 | |
| 57 class BadDirectiveError(TemplateSyntaxError): | |
| 58 """Exception raised when an unknown directive is encountered when parsing | |
| 59 a template. | |
| 60 | |
| 61 An unknown directive is any attribute using the namespace for directives, | |
| 62 with a local name that doesn't match any registered directive. | |
| 63 """ | |
| 64 | |
| 65 def __init__(self, name, filename='<string>', lineno=-1): | |
| 80 | 66 msg = 'bad directive "%s" (%s, line %d)' % (name.localname, filename, |
| 67 lineno) | |
| 68 TemplateSyntaxError.__init__(self, msg, filename, lineno) | |
| 1 | 69 |
| 70 | |
| 71 class TemplateNotFound(TemplateError): | |
| 72 """Exception raised when a specific template file could not be found.""" | |
| 73 | |
| 74 def __init__(self, name, search_path): | |
| 75 TemplateError.__init__(self, 'Template "%s" not found' % name) | |
| 76 self.search_path = search_path | |
| 77 | |
| 78 | |
| 79 class Context(object): | |
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80 """Container for template input data. |
| 1 | 81 |
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82 A context provides a stack of scopes (represented by dictionaries). |
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83 |
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84 Template directives such as loops can push a new scope on the stack with |
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85 data that should only be available inside the loop. When the loop |
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86 terminates, that scope can get popped off the stack again. |
| 1 | 87 |
| 88 >>> ctxt = Context(one='foo', other=1) | |
| 89 >>> ctxt.get('one') | |
| 90 'foo' | |
| 91 >>> ctxt.get('other') | |
| 92 1 | |
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93 >>> ctxt.push(dict(one='frost')) |
| 1 | 94 >>> ctxt.get('one') |
| 95 'frost' | |
| 96 >>> ctxt.get('other') | |
| 97 1 | |
| 98 >>> ctxt.pop() | |
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99 {'one': 'frost'} |
| 1 | 100 >>> ctxt.get('one') |
| 101 'foo' | |
| 102 """ | |
| 103 | |
| 104 def __init__(self, **data): | |
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105 self.frames = deque([data]) |
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106 self.pop = self.frames.popleft |
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107 self.push = self.frames.appendleft |
| 1 | 108 |
| 109 def __repr__(self): | |
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110 return repr(self.frames) |
| 1 | 111 |
| 112 def __setitem__(self, key, value): | |
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113 """Set a variable in the current scope.""" |
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114 self.frames[0][key] = value |
| 1 | 115 |
| 116 def get(self, key): | |
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117 """Get a variable's value, starting at the current scope and going |
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118 upward. |
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119 """ |
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120 for frame in self.frames: |
| 1 | 121 if key in frame: |
| 122 return frame[key] | |
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123 __getitem__ = get |
| 1 | 124 |
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125 def push(self, data): |
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126 """Push a new scope on the stack.""" |
| 1 | 127 |
| 128 def pop(self): | |
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129 """Pop the top-most scope from the stack.""" |
| 1 | 130 |
| 131 | |
| 132 class Directive(object): | |
| 133 """Abstract base class for template directives. | |
| 134 | |
| 54 | 135 A directive is basically a callable that takes three positional arguments: |
| 136 `ctxt` is the template data context, `stream` is an iterable over the | |
| 137 events that the directive applies to, and `directives` is is a list of | |
| 138 other directives on the same stream that need to be applied. | |
| 1 | 139 |
| 140 Directives can be "anonymous" or "registered". Registered directives can be | |
| 141 applied by the template author using an XML attribute with the | |
| 142 corresponding name in the template. Such directives should be subclasses of | |
| 31 | 143 this base class that can be instantiated with the value of the directive |
| 144 attribute as parameter. | |
| 1 | 145 |
| 146 Anonymous directives are simply functions conforming to the protocol | |
| 147 described above, and can only be applied programmatically (for example by | |
| 148 template filters). | |
| 149 """ | |
| 150 __slots__ = ['expr'] | |
| 151 | |
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152 def __init__(self, value, filename=None, lineno=-1, offset=-1): |
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153 try: |
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154 self.expr = value and Expression(value, filename, lineno) or None |
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155 except SyntaxError, err: |
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156 raise TemplateSyntaxError(err, filename, lineno, |
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157 offset + (err.offset or 0)) |
| 1 | 158 |
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159 def __call__(self, stream, ctxt, directives): |
| 1 | 160 raise NotImplementedError |
| 161 | |
| 162 def __repr__(self): | |
| 163 expr = '' | |
| 164 if self.expr is not None: | |
| 165 expr = ' "%s"' % self.expr.source | |
| 166 return '<%s%s>' % (self.__class__.__name__, expr) | |
| 167 | |
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168 |
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169 def _apply_directives(stream, ctxt, directives): |
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170 if directives: |
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171 stream = directives[0](iter(stream), ctxt, directives[1:]) |
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172 return stream |
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173 |
| 1 | 174 |
| 175 class AttrsDirective(Directive): | |
| 176 """Implementation of the `py:attrs` template directive. | |
| 177 | |
| 178 The value of the `py:attrs` attribute should be a dictionary. The keys and | |
| 179 values of that dictionary will be added as attributes to the element: | |
| 180 | |
| 181 >>> ctxt = Context(foo={'class': 'collapse'}) | |
| 61 | 182 >>> tmpl = Template('''<ul xmlns:py="http://markup.edgewall.org/"> |
| 1 | 183 ... <li py:attrs="foo">Bar</li> |
| 184 ... </ul>''') | |
| 185 >>> print tmpl.generate(ctxt) | |
| 186 <ul> | |
| 187 <li class="collapse">Bar</li> | |
| 188 </ul> | |
| 189 | |
| 190 If the value evaluates to `None` (or any other non-truth value), no | |
| 191 attributes are added: | |
| 192 | |
| 193 >>> ctxt = Context(foo=None) | |
| 194 >>> print tmpl.generate(ctxt) | |
| 195 <ul> | |
| 196 <li>Bar</li> | |
| 197 </ul> | |
| 198 """ | |
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199 __slots__ = [] |
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200 |
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201 def __call__(self, stream, ctxt, directives): |
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202 def _generate(): |
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203 kind, (tag, attrib), pos = stream.next() |
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204 attrs = self.expr.evaluate(ctxt) |
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205 if attrs: |
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206 attrib = Attributes(attrib[:]) |
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207 if isinstance(attrs, Stream): |
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208 try: |
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209 attrs = iter(attrs).next() |
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210 except StopIteration: |
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211 attrs = [] |
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212 elif not isinstance(attrs, list): # assume it's a dict |
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213 attrs = attrs.items() |
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214 for name, value in attrs: |
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215 if value is None: |
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216 attrib.remove(name) |
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217 else: |
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218 attrib.set(name, unicode(value).strip()) |
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219 yield kind, (tag, attrib), pos |
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220 for event in stream: |
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221 yield event |
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222 |
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223 return _apply_directives(_generate(), ctxt, directives) |
| 1 | 224 |
| 225 | |
| 226 class ContentDirective(Directive): | |
| 227 """Implementation of the `py:content` template directive. | |
| 228 | |
| 229 This directive replaces the content of the element with the result of | |
| 230 evaluating the value of the `py:content` attribute: | |
| 231 | |
| 232 >>> ctxt = Context(bar='Bye') | |
| 61 | 233 >>> tmpl = Template('''<ul xmlns:py="http://markup.edgewall.org/"> |
| 1 | 234 ... <li py:content="bar">Hello</li> |
| 235 ... </ul>''') | |
| 236 >>> print tmpl.generate(ctxt) | |
| 237 <ul> | |
| 238 <li>Bye</li> | |
| 239 </ul> | |
| 240 """ | |
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241 __slots__ = [] |
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242 |
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243 def __call__(self, stream, ctxt, directives): |
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244 def _generate(): |
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245 kind, data, pos = stream.next() |
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246 if kind is Stream.START: |
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247 yield kind, data, pos # emit start tag |
| 69 | 248 yield EXPR, self.expr, pos |
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249 previous = stream.next() |
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250 for event in stream: |
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251 previous = event |
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252 if previous is not None: |
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253 yield previous |
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254 |
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255 return _apply_directives(_generate(), ctxt, directives) |
| 1 | 256 |
| 257 | |
| 258 class DefDirective(Directive): | |
| 259 """Implementation of the `py:def` template directive. | |
| 260 | |
| 261 This directive can be used to create "Named Template Functions", which | |
| 262 are template snippets that are not actually output during normal | |
| 263 processing, but rather can be expanded from expressions in other places | |
| 264 in the template. | |
| 265 | |
| 266 A named template function can be used just like a normal Python function | |
| 267 from template expressions: | |
| 268 | |
| 269 >>> ctxt = Context(bar='Bye') | |
| 61 | 270 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
| 1 | 271 ... <p py:def="echo(greeting, name='world')" class="message"> |
| 272 ... ${greeting}, ${name}! | |
| 273 ... </p> | |
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274 ... ${echo('Hi', name='you')} |
| 1 | 275 ... </div>''') |
| 276 >>> print tmpl.generate(ctxt) | |
| 277 <div> | |
| 278 <p class="message"> | |
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279 Hi, you! |
| 1 | 280 </p> |
| 281 </div> | |
| 282 | |
|
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283 If a function does not require parameters, the parenthesis can be omitted |
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284 both when defining and when calling it: |
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285 |
| 1 | 286 >>> ctxt = Context(bar='Bye') |
| 61 | 287 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
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288 ... <p py:def="helloworld" class="message"> |
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289 ... Hello, world! |
| 1 | 290 ... </p> |
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291 ... ${helloworld} |
| 1 | 292 ... </div>''') |
| 293 >>> print tmpl.generate(ctxt) | |
| 294 <div> | |
| 295 <p class="message"> | |
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296 Hello, world! |
| 1 | 297 </p> |
| 298 </div> | |
| 299 """ | |
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300 __slots__ = ['name', 'args', 'defaults', 'stream', 'directives'] |
| 1 | 301 |
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302 ATTRIBUTE = 'function' |
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303 |
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304 def __init__(self, args, filename=None, lineno=-1, offset=-1): |
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305 Directive.__init__(self, None, filename, lineno, offset) |
| 1 | 306 ast = compiler.parse(args, 'eval').node |
| 307 self.args = [] | |
| 308 self.defaults = {} | |
| 309 if isinstance(ast, compiler.ast.CallFunc): | |
| 310 self.name = ast.node.name | |
| 311 for arg in ast.args: | |
| 312 if isinstance(arg, compiler.ast.Keyword): | |
| 313 self.args.append(arg.name) | |
| 314 self.defaults[arg.name] = arg.expr.value | |
| 315 else: | |
| 316 self.args.append(arg.name) | |
| 317 else: | |
| 318 self.name = ast.name | |
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319 self.stream, self.directives = [], [] |
| 1 | 320 |
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321 def __call__(self, stream, ctxt, directives): |
| 1 | 322 self.stream = list(stream) |
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323 self.directives = directives |
| 1 | 324 ctxt[self.name] = lambda *args, **kwargs: self._exec(ctxt, *args, |
| 325 **kwargs) | |
| 326 return [] | |
| 327 | |
| 328 def _exec(self, ctxt, *args, **kwargs): | |
| 329 scope = {} | |
| 330 args = list(args) # make mutable | |
| 331 for name in self.args: | |
| 332 if args: | |
| 333 scope[name] = args.pop(0) | |
| 334 else: | |
| 335 scope[name] = kwargs.pop(name, self.defaults.get(name)) | |
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336 ctxt.push(scope) |
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337 for event in _apply_directives(self.stream, ctxt, self.directives): |
| 1 | 338 yield event |
| 339 ctxt.pop() | |
| 340 | |
| 341 | |
| 342 class ForDirective(Directive): | |
| 31 | 343 """Implementation of the `py:for` template directive for repeating an |
| 344 element based on an iterable in the context data. | |
| 1 | 345 |
| 346 >>> ctxt = Context(items=[1, 2, 3]) | |
| 61 | 347 >>> tmpl = Template('''<ul xmlns:py="http://markup.edgewall.org/"> |
| 1 | 348 ... <li py:for="item in items">${item}</li> |
| 349 ... </ul>''') | |
| 350 >>> print tmpl.generate(ctxt) | |
| 351 <ul> | |
| 352 <li>1</li><li>2</li><li>3</li> | |
| 353 </ul> | |
| 354 """ | |
| 355 __slots__ = ['targets'] | |
| 356 | |
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357 ATTRIBUTE = 'each' |
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358 |
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359 def __init__(self, value, filename=None, lineno=-1, offset=-1): |
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360 targets, value = value.split(' in ', 1) |
| 1 | 361 self.targets = [str(name.strip()) for name in targets.split(',')] |
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362 Directive.__init__(self, value, filename, lineno, offset) |
| 1 | 363 |
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364 def __call__(self, stream, ctxt, directives): |
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365 iterable = self.expr.evaluate(ctxt) |
| 1 | 366 if iterable is not None: |
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367 scope = {} |
| 1 | 368 stream = list(stream) |
|
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369 targets = self.targets |
| 1 | 370 for item in iter(iterable): |
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371 if len(targets) == 1: |
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372 scope[targets[0]] = item |
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373 else: |
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374 for idx, name in enumerate(targets): |
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375 scope[name] = item[idx] |
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376 ctxt.push(scope) |
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377 for event in _apply_directives(stream, ctxt, directives): |
| 1 | 378 yield event |
| 379 ctxt.pop() | |
| 380 | |
| 381 def __repr__(self): | |
| 382 return '<%s "%s in %s">' % (self.__class__.__name__, | |
| 383 ', '.join(self.targets), self.expr.source) | |
| 384 | |
| 385 | |
| 386 class IfDirective(Directive): | |
| 31 | 387 """Implementation of the `py:if` template directive for conditionally |
| 388 excluding elements from being output. | |
| 1 | 389 |
| 390 >>> ctxt = Context(foo=True, bar='Hello') | |
| 61 | 391 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
| 1 | 392 ... <b py:if="foo">${bar}</b> |
| 393 ... </div>''') | |
| 394 >>> print tmpl.generate(ctxt) | |
| 395 <div> | |
| 396 <b>Hello</b> | |
| 397 </div> | |
| 398 """ | |
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399 __slots__ = [] |
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400 |
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401 ATTRIBUTE = 'test' |
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402 |
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403 def __call__(self, stream, ctxt, directives): |
| 1 | 404 if self.expr.evaluate(ctxt): |
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405 return _apply_directives(stream, ctxt, directives) |
| 1 | 406 return [] |
| 407 | |
| 408 | |
| 409 class MatchDirective(Directive): | |
| 410 """Implementation of the `py:match` template directive. | |
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411 |
| 61 | 412 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
|
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413 ... <span py:match="greeting"> |
| 1 | 414 ... Hello ${select('@name')} |
| 415 ... </span> | |
| 416 ... <greeting name="Dude" /> | |
| 417 ... </div>''') | |
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418 >>> print tmpl.generate() |
| 1 | 419 <div> |
| 420 <span> | |
| 421 Hello Dude | |
| 422 </span> | |
| 423 </div> | |
| 424 """ | |
| 425 __slots__ = ['path', 'stream'] | |
| 426 | |
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427 ATTRIBUTE = 'path' |
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428 |
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429 def __init__(self, value, filename=None, lineno=-1, offset=-1): |
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430 Directive.__init__(self, None, filename, lineno, offset) |
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431 self.path = Path(value) |
| 1 | 432 self.stream = [] |
| 433 | |
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434 def __call__(self, stream, ctxt, directives): |
| 1 | 435 self.stream = list(stream) |
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436 ctxt._match_templates.append((self.path.test(ignore_context=True), |
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437 self.path, self.stream, directives)) |
| 1 | 438 return [] |
| 439 | |
| 440 def __repr__(self): | |
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441 return '<%s "%s">' % (self.__class__.__name__, self.path.source) |
| 1 | 442 |
| 443 | |
| 444 class ReplaceDirective(Directive): | |
| 445 """Implementation of the `py:replace` template directive. | |
| 446 | |
| 31 | 447 This directive replaces the element with the result of evaluating the |
| 448 value of the `py:replace` attribute: | |
| 449 | |
| 1 | 450 >>> ctxt = Context(bar='Bye') |
| 61 | 451 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
| 1 | 452 ... <span py:replace="bar">Hello</span> |
| 453 ... </div>''') | |
| 454 >>> print tmpl.generate(ctxt) | |
| 455 <div> | |
| 456 Bye | |
| 457 </div> | |
| 458 | |
| 459 This directive is equivalent to `py:content` combined with `py:strip`, | |
| 460 providing a less verbose way to achieve the same effect: | |
| 461 | |
| 462 >>> ctxt = Context(bar='Bye') | |
| 61 | 463 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
| 1 | 464 ... <span py:content="bar" py:strip="">Hello</span> |
| 465 ... </div>''') | |
| 466 >>> print tmpl.generate(ctxt) | |
| 467 <div> | |
| 468 Bye | |
| 469 </div> | |
| 470 """ | |
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471 __slots__ = [] |
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472 |
| 54 | 473 def __call__(self, stream, ctxt, directives): |
| 1 | 474 kind, data, pos = stream.next() |
| 69 | 475 yield EXPR, self.expr, pos |
| 1 | 476 |
| 477 | |
| 478 class StripDirective(Directive): | |
| 479 """Implementation of the `py:strip` template directive. | |
| 480 | |
| 481 When the value of the `py:strip` attribute evaluates to `True`, the element | |
| 482 is stripped from the output | |
| 483 | |
| 61 | 484 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
| 1 | 485 ... <div py:strip="True"><b>foo</b></div> |
| 486 ... </div>''') | |
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487 >>> print tmpl.generate() |
| 1 | 488 <div> |
| 489 <b>foo</b> | |
| 490 </div> | |
| 491 | |
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492 Leaving the attribute value empty is equivalent to a truth value. |
| 1 | 493 |
| 494 This directive is particulary interesting for named template functions or | |
| 495 match templates that do not generate a top-level element: | |
| 496 | |
| 61 | 497 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
| 1 | 498 ... <div py:def="echo(what)" py:strip=""> |
| 499 ... <b>${what}</b> | |
| 500 ... </div> | |
| 501 ... ${echo('foo')} | |
| 502 ... </div>''') | |
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503 >>> print tmpl.generate() |
| 1 | 504 <div> |
| 505 <b>foo</b> | |
| 506 </div> | |
| 507 """ | |
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508 __slots__ = [] |
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509 |
| 54 | 510 def __call__(self, stream, ctxt, directives): |
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511 def _generate(): |
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512 if self.expr: |
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513 strip = self.expr.evaluate(ctxt) |
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514 else: |
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515 strip = True |
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516 if strip: |
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517 stream.next() # skip start tag |
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518 previous = stream.next() |
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519 for event in stream: |
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520 yield previous |
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521 previous = event |
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522 else: |
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523 for event in stream: |
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524 yield event |
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525 |
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526 return _apply_directives(_generate(), ctxt, directives) |
| 1 | 527 |
| 528 | |
|
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529 class ChooseDirective(Directive): |
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530 """Implementation of the `py:choose` directive for conditionally selecting |
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531 one of several body elements to display. |
|
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532 |
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533 If the `py:choose` expression is empty the expressions of nested `py:when` |
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534 directives are tested for truth. The first true `py:when` body is output. |
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535 If no `py:when` directive is matched then the fallback directive |
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536 `py:otherwise` will be used. |
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537 |
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538 >>> ctxt = Context() |
| 61 | 539 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/" |
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540 ... py:choose=""> |
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541 ... <span py:when="0 == 1">0</span> |
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542 ... <span py:when="1 == 1">1</span> |
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543 ... <span py:otherwise="">2</span> |
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544 ... </div>''') |
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545 >>> print tmpl.generate(ctxt) |
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546 <div> |
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547 <span>1</span> |
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548 </div> |
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549 |
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550 If the `py:choose` directive contains an expression, the nested `py:when` |
|
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551 directives are tested for equality to the `py:choose` expression: |
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552 |
| 61 | 553 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/" |
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554 ... py:choose="2"> |
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555 ... <span py:when="1">1</span> |
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556 ... <span py:when="2">2</span> |
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557 ... </div>''') |
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558 >>> print tmpl.generate(ctxt) |
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559 <div> |
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560 <span>2</span> |
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561 </div> |
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562 |
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563 Behavior is undefined if a `py:choose` block contains content outside a |
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564 `py:when` or `py:otherwise` block. Behavior is also undefined if a |
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565 `py:otherwise` occurs before `py:when` blocks. |
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566 """ |
|
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567 __slots__ = ['matched', 'value'] |
|
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568 |
|
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569 ATTRIBUTE = 'test' |
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570 |
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571 def __call__(self, stream, ctxt, directives): |
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572 if self.expr: |
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573 self.value = self.expr.evaluate(ctxt) |
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574 self.matched = False |
|
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575 ctxt.push(dict(_choose=self)) |
|
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576 for event in _apply_directives(stream, ctxt, directives): |
|
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577 yield event |
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578 ctxt.pop() |
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579 |
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580 |
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581 class WhenDirective(Directive): |
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582 """Implementation of the `py:when` directive for nesting in a parent with |
|
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583 the `py:choose` directive. |
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584 |
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585 See the documentation of `py:choose` for usage. |
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586 """ |
|
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587 |
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588 ATTRIBUTE = 'test' |
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589 |
| 54 | 590 def __call__(self, stream, ctxt, directives): |
|
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591 choose = ctxt['_choose'] |
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592 if choose.matched: |
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593 return [] |
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594 value = self.expr.evaluate(ctxt) |
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595 try: |
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596 if value == choose.value: |
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597 choose.matched = True |
|
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598 return _apply_directives(stream, ctxt, directives) |
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599 except AttributeError: |
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600 if value: |
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601 choose.matched = True |
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602 return _apply_directives(stream, ctxt, directives) |
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603 return [] |
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604 |
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605 |
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606 class OtherwiseDirective(Directive): |
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607 """Implementation of the `py:otherwise` directive for nesting in a parent |
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608 with the `py:choose` directive. |
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609 |
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610 See the documentation of `py:choose` for usage. |
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611 """ |
| 54 | 612 def __call__(self, stream, ctxt, directives): |
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613 choose = ctxt['_choose'] |
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614 if choose.matched: |
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615 return [] |
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616 choose.matched = True |
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617 return _apply_directives(stream, ctxt, directives) |
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618 |
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619 |
| 1 | 620 class Template(object): |
| 621 """Can parse a template and transform it into the corresponding output | |
| 622 based on context data. | |
| 623 """ | |
| 61 | 624 NAMESPACE = Namespace('http://markup.edgewall.org/') |
| 1 | 625 |
|
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626 EXPR = StreamEventKind('EXPR') # an expression |
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627 SUB = StreamEventKind('SUB') # a "subprogram" |
|
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628 |
| 1 | 629 directives = [('def', DefDirective), |
| 630 ('match', MatchDirective), | |
| 631 ('for', ForDirective), | |
| 632 ('if', IfDirective), | |
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633 ('when', WhenDirective), |
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634 ('otherwise', OtherwiseDirective), |
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635 ('choose', ChooseDirective), |
| 1 | 636 ('replace', ReplaceDirective), |
| 637 ('content', ContentDirective), | |
| 638 ('attrs', AttrsDirective), | |
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639 ('strip', StripDirective)] |
| 1 | 640 _dir_by_name = dict(directives) |
| 641 _dir_order = [directive[1] for directive in directives] | |
| 642 | |
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643 def __init__(self, source, basedir=None, filename=None): |
| 1 | 644 """Initialize a template from either a string or a file-like object.""" |
| 645 if isinstance(source, basestring): | |
| 646 self.source = StringIO(source) | |
| 647 else: | |
| 648 self.source = source | |
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649 self.basedir = basedir |
| 1 | 650 self.filename = filename or '<string>' |
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651 if basedir and filename: |
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652 self.filepath = os.path.join(basedir, filename) |
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653 else: |
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654 self.filepath = '<string>' |
| 1 | 655 |
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656 self.filters = [] |
| 1 | 657 self.parse() |
| 658 | |
| 659 def __repr__(self): | |
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660 return '<%s "%s">' % (self.__class__.__name__, self.filename) |
| 1 | 661 |
| 662 def parse(self): | |
| 663 """Parse the template. | |
| 664 | |
| 665 The parsing stage parses the XML template and constructs a list of | |
| 666 directives that will be executed in the render stage. The input is | |
| 667 split up into literal output (markup that does not depend on the | |
| 668 context data) and actual directives (commands or variable | |
| 669 substitution). | |
| 670 """ | |
| 671 stream = [] # list of events of the "compiled" template | |
| 672 dirmap = {} # temporary mapping of directives to elements | |
| 673 ns_prefix = {} | |
| 674 depth = 0 | |
| 675 | |
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676 for kind, data, pos in XMLParser(self.source, filename=self.filename): |
| 1 | 677 |
| 69 | 678 if kind is START_NS: |
| 1 | 679 # Strip out the namespace declaration for template directives |
| 680 prefix, uri = data | |
| 681 if uri == self.NAMESPACE: | |
| 682 ns_prefix[prefix] = uri | |
| 683 else: | |
| 684 stream.append((kind, data, pos)) | |
| 685 | |
| 69 | 686 elif kind is END_NS: |
| 1 | 687 if data in ns_prefix: |
| 688 del ns_prefix[data] | |
| 689 else: | |
| 690 stream.append((kind, data, pos)) | |
| 691 | |
| 69 | 692 elif kind is START: |
| 1 | 693 # Record any directive attributes in start tags |
| 694 tag, attrib = data | |
| 695 directives = [] | |
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696 strip = False |
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697 |
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|
698 if tag in self.NAMESPACE: |
|
5c024cf58ecb
Support the use of directives as elements to reduce the need for using `py:strip`.
cmlenz
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61
diff
changeset
|
699 cls = self._dir_by_name.get(tag.localname) |
|
5c024cf58ecb
Support the use of directives as elements to reduce the need for using `py:strip`.
cmlenz
parents:
61
diff
changeset
|
700 if cls is None: |
|
5c024cf58ecb
Support the use of directives as elements to reduce the need for using `py:strip`.
cmlenz
parents:
61
diff
changeset
|
701 raise BadDirectiveError(tag, pos[0], pos[1]) |
|
66
822089ae65ce
Switch copyright to Edgewall and URLs to markup.edgewall.org.
cmlenz
parents:
65
diff
changeset
|
702 value = attrib.get(getattr(cls, 'ATTRIBUTE', None), '') |
|
81
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
703 directives.append(cls(value, *pos)) |
|
65
5c024cf58ecb
Support the use of directives as elements to reduce the need for using `py:strip`.
cmlenz
parents:
61
diff
changeset
|
704 strip = True |
|
5c024cf58ecb
Support the use of directives as elements to reduce the need for using `py:strip`.
cmlenz
parents:
61
diff
changeset
|
705 |
| 1 | 706 new_attrib = [] |
| 707 for name, value in attrib: | |
|
18
4cbebb15a834
Actually make use of the `markup.core.Namespace` class, and add a couple of doctests.
cmlenz
parents:
17
diff
changeset
|
708 if name in self.NAMESPACE: |
| 1 | 709 cls = self._dir_by_name.get(name.localname) |
| 710 if cls is None: | |
|
65
5c024cf58ecb
Support the use of directives as elements to reduce the need for using `py:strip`.
cmlenz
parents:
61
diff
changeset
|
711 raise BadDirectiveError(name, pos[0], pos[1]) |
|
81
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
712 directives.append(cls(value, *pos)) |
| 1 | 713 else: |
|
75
c3c26300a46d
Empty attributes in templates were being stripped out. Thanks to Jonas for the patch.
cmlenz
parents:
74
diff
changeset
|
714 if value: |
|
c3c26300a46d
Empty attributes in templates were being stripped out. Thanks to Jonas for the patch.
cmlenz
parents:
74
diff
changeset
|
715 value = list(self._interpolate(value, *pos)) |
|
81
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
716 if len(value) == 1 and value[0][0] is TEXT: |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
717 value = value[0][1] |
|
75
c3c26300a46d
Empty attributes in templates were being stripped out. Thanks to Jonas for the patch.
cmlenz
parents:
74
diff
changeset
|
718 else: |
|
c3c26300a46d
Empty attributes in templates were being stripped out. Thanks to Jonas for the patch.
cmlenz
parents:
74
diff
changeset
|
719 value = [(TEXT, u'', pos)] |
| 1 | 720 new_attrib.append((name, value)) |
|
65
5c024cf58ecb
Support the use of directives as elements to reduce the need for using `py:strip`.
cmlenz
parents:
61
diff
changeset
|
721 |
| 1 | 722 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.
cmlenz
parents:
48
diff
changeset
|
723 directives.sort(lambda a, b: cmp(self._dir_order.index(a.__class__), |
|
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
|
724 self._dir_order.index(b.__class__))) |
|
65
5c024cf58ecb
Support the use of directives as elements to reduce the need for using `py:strip`.
cmlenz
parents:
61
diff
changeset
|
725 dirmap[(depth, tag)] = (directives, len(stream), strip) |
| 1 | 726 |
| 727 stream.append((kind, (tag, Attributes(new_attrib)), pos)) | |
| 728 depth += 1 | |
| 729 | |
| 69 | 730 elif kind is END: |
| 1 | 731 depth -= 1 |
| 732 stream.append((kind, data, pos)) | |
| 733 | |
| 734 # If there have have directive attributes with the corresponding | |
| 735 # start tag, move the events inbetween into a "subprogram" | |
| 736 if (depth, data) in dirmap: | |
|
65
5c024cf58ecb
Support the use of directives as elements to reduce the need for using `py:strip`.
cmlenz
parents:
61
diff
changeset
|
737 directives, start_offset, strip = dirmap.pop((depth, data)) |
| 1 | 738 substream = stream[start_offset:] |
|
65
5c024cf58ecb
Support the use of directives as elements to reduce the need for using `py:strip`.
cmlenz
parents:
61
diff
changeset
|
739 if strip: |
|
5c024cf58ecb
Support the use of directives as elements to reduce the need for using `py:strip`.
cmlenz
parents:
61
diff
changeset
|
740 substream = substream[1:-1] |
| 69 | 741 stream[start_offset:] = [(SUB, (directives, substream), |
| 742 pos)] | |
| 1 | 743 |
| 69 | 744 elif kind is TEXT: |
| 1 | 745 for kind, data, pos in self._interpolate(data, *pos): |
| 746 stream.append((kind, data, pos)) | |
| 747 | |
|
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.
cmlenz
parents:
87
diff
changeset
|
748 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.
cmlenz
parents:
87
diff
changeset
|
749 if not data.lstrip().startswith('!'): |
|
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.
cmlenz
parents:
87
diff
changeset
|
750 stream.append((kind, data, pos)) |
|
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.
cmlenz
parents:
87
diff
changeset
|
751 |
| 1 | 752 else: |
| 753 stream.append((kind, data, pos)) | |
| 754 | |
| 755 self.stream = stream | |
| 756 | |
| 757 _FULL_EXPR_RE = re.compile(r'(?<!\$)\$\{(.+?)\}') | |
| 758 _SHORT_EXPR_RE = re.compile(r'(?<!\$)\$([a-zA-Z][a-zA-Z0-9_\.]*)') | |
| 759 | |
|
21
eca77129518a
* Include paths are now interpreted relative to the path of the including template. Closes #3.
cmlenz
parents:
18
diff
changeset
|
760 def _interpolate(cls, text, filename=None, lineno=-1, offset=-1): |
| 1 | 761 """Parse the given string and extract expressions. |
| 762 | |
| 763 This method returns a list containing both literal text and `Expression` | |
| 764 objects. | |
|
14
76b5d4b189e6
The `<py:match>` directive now protects itself against simple infinite recursion (see MatchDirective), while still allowing recursion in general.
cmlenz
parents:
13
diff
changeset
|
765 |
| 1 | 766 @param text: the text to parse |
| 767 @param lineno: the line number at which the text was found (optional) | |
| 768 @param offset: the column number at which the text starts in the source | |
| 769 (optional) | |
| 770 """ | |
|
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
|
771 def _interpolate(text, patterns): |
| 1 | 772 for idx, group in enumerate(patterns.pop(0).split(text)): |
| 773 if idx % 2: | |
|
81
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
774 try: |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
775 yield EXPR, Expression(group, filename, lineno), \ |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
776 (lineno, offset) |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
777 except SyntaxError, err: |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
778 raise TemplateSyntaxError(err, filename, lineno, |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
779 offset + (err.offset or 0)) |
| 1 | 780 elif group: |
| 781 if patterns: | |
|
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
|
782 for result in _interpolate(group, patterns[:]): |
| 1 | 783 yield result |
| 784 else: | |
| 69 | 785 yield TEXT, group.replace('$$', '$'), (filename, lineno, |
| 786 offset) | |
|
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
|
787 return _interpolate(text, [cls._FULL_EXPR_RE, cls._SHORT_EXPR_RE]) |
| 1 | 788 _interpolate = classmethod(_interpolate) |
| 789 | |
|
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
|
790 def generate(self, 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
|
791 """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
|
792 |
|
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
|
793 @param ctxt: a `Context` instance containing the data for the template |
|
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
|
794 @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
|
795 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
|
796 """ |
|
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
|
797 if ctxt 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
|
798 ctxt = Context() |
|
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
|
799 if not hasattr(ctxt, '_match_templates'): |
|
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
|
800 ctxt._match_templates = [] |
|
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
|
801 |
| 69 | 802 stream = self.stream |
| 803 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
|
804 stream = filter_(iter(stream), ctxt) |
|
3bc4778787c5
Simplify template processing model by removing dynamically generated `SUB` events.
cmlenz
parents:
31
diff
changeset
|
805 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
|
806 |
|
77
f1aa49c759b2
* Simplify implementation of the individual XPath tests (use closures instead of callable classes)
cmlenz
parents:
75
diff
changeset
|
807 def _ensure(self, stream, ctxt=None): |
|
f1aa49c759b2
* Simplify implementation of the individual XPath tests (use closures instead of callable classes)
cmlenz
parents:
75
diff
changeset
|
808 """Ensure that every item on the stream is actually a markup event.""" |
|
f1aa49c759b2
* Simplify implementation of the individual XPath tests (use closures instead of callable classes)
cmlenz
parents:
75
diff
changeset
|
809 for event in stream: |
|
f1aa49c759b2
* Simplify implementation of the individual XPath tests (use closures instead of callable classes)
cmlenz
parents:
75
diff
changeset
|
810 try: |
|
f1aa49c759b2
* Simplify implementation of the individual XPath tests (use closures instead of callable classes)
cmlenz
parents:
75
diff
changeset
|
811 kind, data, pos = event |
|
f1aa49c759b2
* Simplify implementation of the individual XPath tests (use closures instead of callable classes)
cmlenz
parents:
75
diff
changeset
|
812 except ValueError: |
|
f1aa49c759b2
* Simplify implementation of the individual XPath tests (use closures instead of callable classes)
cmlenz
parents:
75
diff
changeset
|
813 kind, data, pos = event.totuple() |
|
f1aa49c759b2
* Simplify implementation of the individual XPath tests (use closures instead of callable classes)
cmlenz
parents:
75
diff
changeset
|
814 yield kind, data, pos |
|
f1aa49c759b2
* Simplify implementation of the individual XPath tests (use closures instead of callable classes)
cmlenz
parents:
75
diff
changeset
|
815 |
|
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
|
816 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
|
817 """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
|
818 `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
|
819 """ |
|
81
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
820 filters = (self._ensure, self._eval, self._match) |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
821 |
|
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
|
822 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
|
823 |
|
81
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
824 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
|
825 # 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
|
826 # 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
|
827 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
|
828 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
|
829 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
|
830 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
|
831 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
|
832 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
|
833 values = [] |
|
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
|
834 for subkind, subdata, subpos in substream: |
| 69 | 835 if subkind 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
|
836 values.append(subdata.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
|
837 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
|
838 values.append(subdata) |
|
48
06c642ba2b08
convert the result of expressions in attributes to strings so that values like ints are output correctly
mgood
parents:
44
diff
changeset
|
839 value = [unicode(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
|
840 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
|
841 continue |
|
23
00835401c8cc
Separate match and eval filters from the include and user-supplied filters.
cmlenz
parents:
22
diff
changeset
|
842 new_attrib.append((name, u''.join(value))) |
|
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
|
843 yield kind, (tag, Attributes(new_attrib)), 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
|
844 |
| 69 | 845 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
|
846 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
|
847 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
|
848 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
|
849 |
|
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
|
850 # 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
|
851 # 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
|
852 # 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
|
853 if isinstance(result, basestring): |
| 69 | 854 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
|
855 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
|
856 # 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
|
857 # 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
|
858 try: |
|
77
f1aa49c759b2
* Simplify implementation of the individual XPath tests (use closures instead of callable classes)
cmlenz
parents:
75
diff
changeset
|
859 substream = iter(result) |
|
81
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
860 for filter_ in filters: |
|
77
f1aa49c759b2
* Simplify implementation of the individual XPath tests (use closures instead of callable classes)
cmlenz
parents:
75
diff
changeset
|
861 substream = filter_(substream, ctxt) |
|
f1aa49c759b2
* Simplify implementation of the individual XPath tests (use closures instead of callable classes)
cmlenz
parents:
75
diff
changeset
|
862 for event in substream: |
|
35
3bc4778787c5
Simplify template processing model by removing dynamically generated `SUB` events.
cmlenz
parents:
31
diff
changeset
|
863 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
|
864 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
|
865 # 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
|
866 # through |
| 69 | 867 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
|
868 |
|
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
|
869 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
|
870 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
|
871 |
|
23
00835401c8cc
Separate match and eval filters from the include and user-supplied filters.
cmlenz
parents:
22
diff
changeset
|
872 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
|
873 """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
|
874 for kind, data, pos in stream: |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
875 if kind is SUB: |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
876 # 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
|
877 # events to which those directives should be applied |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
878 directives, substream = data |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
879 substream = _apply_directives(substream, ctxt, directives) |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
880 for filter_ in (self._eval, self._match, self._flatten): |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
881 substream = filter_(substream, ctxt) |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
882 for event in substream: |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
883 yield event |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
884 else: |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
885 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
|
886 |
|
36
57d607f25484
Fix for #7: match templates no longer process their own output.
cmlenz
parents:
35
diff
changeset
|
887 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
|
888 """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
|
889 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
|
890 """ |
|
36
57d607f25484
Fix for #7: match templates no longer process their own output.
cmlenz
parents:
35
diff
changeset
|
891 if match_templates is None: |
|
57d607f25484
Fix for #7: match templates no longer process their own output.
cmlenz
parents:
35
diff
changeset
|
892 match_templates = ctxt._match_templates |
|
57d607f25484
Fix for #7: match templates no longer process their own output.
cmlenz
parents:
35
diff
changeset
|
893 |
|
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
|
894 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
|
895 |
|
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
|
896 # 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
|
897 # 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
|
898 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
|
899 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
|
900 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
|
901 |
|
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
|
902 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
|
903 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
|
904 result = test(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
|
905 |
|
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
|
906 if result: |
|
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 # 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
|
908 # 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
|
909 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
|
910 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
|
911 while depth > 0: |
| 73 | 912 kind, data, pos = stream.next() |
| 913 if kind is START: | |
| 914 depth += 1 | |
| 915 elif kind is END: | |
| 916 depth -= 1 | |
| 917 content.append((kind, data, pos)) | |
| 918 test(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
|
919 |
|
23
00835401c8cc
Separate match and eval filters from the include and user-supplied filters.
cmlenz
parents:
22
diff
changeset
|
920 content = list(self._flatten(content, ctxt)) |
|
95
7d6426183a90
Improve performance of push/pop operations on the context.
cmlenz
parents:
93
diff
changeset
|
921 select = lambda path: Stream(content).select(path) |
|
7d6426183a90
Improve performance of push/pop operations on the context.
cmlenz
parents:
93
diff
changeset
|
922 ctxt.push(dict(select=select)) |
|
36
57d607f25484
Fix for #7: match templates no longer process their own output.
cmlenz
parents:
35
diff
changeset
|
923 |
|
78
fa4bafcbe4c7
Minor improvements to how directives are applied in template processing.
cmlenz
parents:
77
diff
changeset
|
924 template = _apply_directives(template, ctxt, directives) |
| 69 | 925 for event in self._match(self._eval(template, ctxt), |
| 926 ctxt, match_templates[:idx] + | |
| 927 match_templates[idx + 1:]): | |
|
35
3bc4778787c5
Simplify template processing model by removing dynamically generated `SUB` events.
cmlenz
parents:
31
diff
changeset
|
928 yield event |
|
3bc4778787c5
Simplify template processing model by removing dynamically generated `SUB` events.
cmlenz
parents:
31
diff
changeset
|
929 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
|
930 |
|
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 break |
| 69 | 932 |
| 933 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
|
934 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
|
935 |
| 1 | 936 |
| 69 | 937 EXPR = Template.EXPR |
| 938 SUB = Template.SUB | |
| 939 | |
| 940 | |
| 1 | 941 class TemplateLoader(object): |
| 942 """Responsible for loading templates from files on the specified search | |
| 943 path. | |
| 944 | |
| 945 >>> import tempfile | |
| 946 >>> fd, path = tempfile.mkstemp(suffix='.html', prefix='template') | |
| 947 >>> os.write(fd, '<p>$var</p>') | |
| 948 11 | |
| 949 >>> os.close(fd) | |
| 950 | |
| 951 The template loader accepts a list of directory paths that are then used | |
| 952 when searching for template files, in the given order: | |
| 953 | |
| 954 >>> loader = TemplateLoader([os.path.dirname(path)]) | |
| 955 | |
| 956 The `load()` method first checks the template cache whether the requested | |
| 957 template has already been loaded. If not, it attempts to locate the | |
| 958 template file, and returns the corresponding `Template` object: | |
| 959 | |
| 960 >>> template = loader.load(os.path.basename(path)) | |
| 961 >>> isinstance(template, Template) | |
| 962 True | |
| 963 | |
| 964 Template instances are cached: requesting a template with the same name | |
| 965 results in the same instance being returned: | |
| 966 | |
| 967 >>> loader.load(os.path.basename(path)) is template | |
| 968 True | |
| 969 """ | |
| 970 def __init__(self, search_path=None, auto_reload=False): | |
| 971 """Create the template laoder. | |
| 972 | |
| 973 @param search_path: a list of absolute path names that should be | |
| 974 searched for template files | |
| 975 @param auto_reload: whether to check the last modification time of | |
| 976 template files, and reload them if they have changed | |
| 977 """ | |
| 978 self.search_path = search_path | |
| 979 if self.search_path is None: | |
| 980 self.search_path = [] | |
| 981 self.auto_reload = auto_reload | |
| 982 self._cache = {} | |
| 983 self._mtime = {} | |
| 984 | |
|
21
eca77129518a
* Include paths are now interpreted relative to the path of the including template. Closes #3.
cmlenz
parents:
18
diff
changeset
|
985 def load(self, filename, relative_to=None): |
| 1 | 986 """Load the template with the given name. |
| 987 | |
|
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
|
988 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
|
989 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
|
990 name is an absolute path, the search path is not bypassed. |
| 1 | 991 |
|
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
|
992 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
|
993 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
|
994 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
|
995 |
|
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
|
996 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
|
997 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
|
998 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
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999 object (unless the `auto_reload` option is enabled and the file was |
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1000 changed since the last parse.) |
| 1 | 1001 |
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1002 If the `relative_to` parameter is provided, the `filename` is |
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1003 interpreted as being relative to that path. |
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1004 |
| 1 | 1005 @param filename: the relative path of the template file to load |
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1006 @param relative_to: the filename of the template from which the new |
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1007 template is being loaded, or `None` if the template is being loaded |
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1008 directly |
| 1 | 1009 """ |
| 69 | 1010 from markup.filters import IncludeFilter |
| 1011 | |
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1012 if relative_to: |
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1013 filename = posixpath.join(posixpath.dirname(relative_to), filename) |
| 1 | 1014 filename = os.path.normpath(filename) |
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1015 |
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1016 # First check the cache to avoid reparsing the same file |
| 1 | 1017 try: |
| 1018 tmpl = self._cache[filename] | |
| 1019 if not self.auto_reload or \ | |
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1020 os.path.getmtime(tmpl.filepath) == self._mtime[filename]: |
| 1 | 1021 return tmpl |
| 1022 except KeyError: | |
| 1023 pass | |
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1024 |
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1025 # Bypass the search path if the filename is absolute |
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1026 search_path = self.search_path |
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1027 if os.path.isabs(filename): |
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1028 search_path = [os.path.dirname(filename)] |
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1029 |
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1030 for dirname in search_path: |
| 1 | 1031 filepath = os.path.join(dirname, filename) |
| 1032 try: | |
| 1033 fileobj = file(filepath, 'rt') | |
| 1034 try: | |
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1035 tmpl = Template(fileobj, basedir=dirname, filename=filename) |
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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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1036 tmpl.filters.append(IncludeFilter(self)) |
| 1 | 1037 finally: |
| 1038 fileobj.close() | |
| 1039 self._cache[filename] = tmpl | |
| 1040 self._mtime[filename] = os.path.getmtime(filepath) | |
| 1041 return tmpl | |
| 1042 except IOError: | |
| 1043 continue | |
| 1044 raise TemplateNotFound(filename, self.search_path) |