Mercurial > genshi > genshi-test
annotate markup/template.py @ 215:e92135672812
A couple of minor XPath fixes.
| author | cmlenz |
|---|---|
| date | Fri, 01 Sep 2006 13:45:42 +0000 |
| parents | 813b7115d27f |
| children | d8b195b22a44 |
| rev | line source |
|---|---|
| 1 | 1 # -*- coding: utf-8 -*- |
| 2 # | |
|
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Switch copyright to Edgewall and URLs to markup.edgewall.org.
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3 # Copyright (C) 2006 Edgewall Software |
| 1 | 4 # All rights reserved. |
| 5 # | |
| 6 # This software is licensed as described in the file COPYING, which | |
| 7 # you should have received as part of this distribution. The terms | |
|
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8 # are also available at http://markup.edgewall.org/wiki/License. |
| 1 | 9 # |
| 10 # This software consists of voluntary contributions made by many | |
| 11 # individuals. For the exact contribution history, see the revision | |
|
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12 # history and logs, available at http://markup.edgewall.org/log/. |
| 1 | 13 |
| 82 | 14 """Implementation of the template engine.""" |
| 1 | 15 |
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16 try: |
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17 from collections import deque |
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18 except ImportError: |
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19 class deque(list): |
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20 def appendleft(self, x): self.insert(0, x) |
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21 def popleft(self): return self.pop(0) |
| 1 | 22 import compiler |
| 23 import os | |
| 24 import re | |
| 25 from StringIO import StringIO | |
| 26 | |
|
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27 from markup.core import Attrs, Namespace, Stream, StreamEventKind, _ensure |
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28 from markup.core import START, END, START_NS, END_NS, TEXT, COMMENT |
| 1 | 29 from markup.eval import Expression |
| 69 | 30 from markup.input import XMLParser |
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31 from markup.path import Path |
| 1 | 32 |
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33 __all__ = ['BadDirectiveError', 'TemplateError', 'TemplateSyntaxError', |
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34 'TemplateNotFound', 'Template', 'TemplateLoader'] |
| 1 | 35 |
| 36 | |
| 37 class TemplateError(Exception): | |
| 38 """Base exception class for errors related to template processing.""" | |
| 39 | |
| 40 | |
| 41 class TemplateSyntaxError(TemplateError): | |
| 42 """Exception raised when an expression in a template causes a Python syntax | |
| 43 error.""" | |
| 44 | |
| 45 def __init__(self, message, filename='<string>', lineno=-1, offset=-1): | |
| 46 if isinstance(message, SyntaxError) and message.lineno is not None: | |
| 47 message = str(message).replace(' (line %d)' % message.lineno, '') | |
| 213 | 48 self.msg = message |
| 49 message = '%s (%s, line %d)' % (self.msg, filename, lineno) | |
| 1 | 50 TemplateError.__init__(self, message) |
| 51 self.filename = filename | |
| 52 self.lineno = lineno | |
| 53 self.offset = offset | |
| 54 | |
| 55 | |
| 56 class BadDirectiveError(TemplateSyntaxError): | |
| 57 """Exception raised when an unknown directive is encountered when parsing | |
| 58 a template. | |
| 59 | |
| 60 An unknown directive is any attribute using the namespace for directives, | |
| 61 with a local name that doesn't match any registered directive. | |
| 62 """ | |
| 63 | |
| 64 def __init__(self, name, filename='<string>', lineno=-1): | |
| 213 | 65 message = 'bad directive "%s"' % name.localname |
| 66 TemplateSyntaxError.__init__(self, message, filename, lineno) | |
| 1 | 67 |
| 68 | |
| 69 class TemplateNotFound(TemplateError): | |
| 70 """Exception raised when a specific template file could not be found.""" | |
| 71 | |
| 72 def __init__(self, name, search_path): | |
| 73 TemplateError.__init__(self, 'Template "%s" not found' % name) | |
| 74 self.search_path = search_path | |
| 75 | |
| 76 | |
| 77 class Context(object): | |
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78 """Container for template input data. |
| 1 | 79 |
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80 A context provides a stack of scopes (represented by dictionaries). |
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81 |
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82 Template directives such as loops can push a new scope on the stack with |
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83 data that should only be available inside the loop. When the loop |
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84 terminates, that scope can get popped off the stack again. |
| 1 | 85 |
| 86 >>> ctxt = Context(one='foo', other=1) | |
| 87 >>> ctxt.get('one') | |
| 88 'foo' | |
| 89 >>> ctxt.get('other') | |
| 90 1 | |
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91 >>> ctxt.push(dict(one='frost')) |
| 1 | 92 >>> ctxt.get('one') |
| 93 'frost' | |
| 94 >>> ctxt.get('other') | |
| 95 1 | |
| 96 >>> ctxt.pop() | |
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97 {'one': 'frost'} |
| 1 | 98 >>> ctxt.get('one') |
| 99 'foo' | |
| 100 """ | |
| 101 | |
| 102 def __init__(self, **data): | |
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103 self.frames = deque([data]) |
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104 self.pop = self.frames.popleft |
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105 self.push = self.frames.appendleft |
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106 self._match_templates = [] |
| 1 | 107 |
| 108 def __repr__(self): | |
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109 return repr(self.frames) |
| 1 | 110 |
| 111 def __setitem__(self, key, value): | |
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112 """Set a variable in the current scope.""" |
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113 self.frames[0][key] = value |
| 1 | 114 |
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115 def _find(self, key, default=None): |
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116 """Retrieve a given variable's value and frame it was found in. |
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117 |
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118 Intented for internal use by directives. |
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119 """ |
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120 for frame in self.frames: |
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121 if key in frame: |
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122 return frame[key], frame |
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123 return default, None |
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124 |
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125 def get(self, key, default=None): |
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126 """Get a variable's value, starting at the current scope and going |
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127 upward. |
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128 """ |
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129 for frame in self.frames: |
| 1 | 130 if key in frame: |
| 131 return frame[key] | |
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132 return default |
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133 __getitem__ = get |
| 1 | 134 |
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135 def push(self, data): |
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136 """Push a new scope on the stack.""" |
| 1 | 137 |
| 138 def pop(self): | |
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139 """Pop the top-most scope from the stack.""" |
| 1 | 140 |
| 141 | |
| 142 class Directive(object): | |
| 143 """Abstract base class for template directives. | |
| 144 | |
| 54 | 145 A directive is basically a callable that takes three positional arguments: |
| 146 `ctxt` is the template data context, `stream` is an iterable over the | |
| 147 events that the directive applies to, and `directives` is is a list of | |
| 148 other directives on the same stream that need to be applied. | |
| 1 | 149 |
| 150 Directives can be "anonymous" or "registered". Registered directives can be | |
| 151 applied by the template author using an XML attribute with the | |
| 152 corresponding name in the template. Such directives should be subclasses of | |
| 31 | 153 this base class that can be instantiated with the value of the directive |
| 154 attribute as parameter. | |
| 1 | 155 |
| 156 Anonymous directives are simply functions conforming to the protocol | |
| 157 described above, and can only be applied programmatically (for example by | |
| 158 template filters). | |
| 159 """ | |
| 160 __slots__ = ['expr'] | |
| 161 | |
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162 def __init__(self, value, filename=None, lineno=-1, offset=-1): |
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163 try: |
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164 self.expr = value and Expression(value, filename, lineno) or None |
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165 except SyntaxError, err: |
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166 err.msg += ' in expression "%s" of "%s" directive' % (value, |
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167 self.tagname) |
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168 raise TemplateSyntaxError(err, filename, lineno, |
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169 offset + (err.offset or 0)) |
| 1 | 170 |
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171 def __call__(self, stream, ctxt, directives): |
| 1 | 172 raise NotImplementedError |
| 173 | |
| 174 def __repr__(self): | |
| 175 expr = '' | |
| 176 if self.expr is not None: | |
| 177 expr = ' "%s"' % self.expr.source | |
| 178 return '<%s%s>' % (self.__class__.__name__, expr) | |
| 179 | |
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180 def tagname(self): |
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181 """Return the local tag name of the directive as it is used in |
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182 templates. |
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183 """ |
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184 return self.__class__.__name__.lower().replace('directive', '') |
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185 tagname = property(tagname) |
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186 |
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187 |
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188 def _apply_directives(stream, ctxt, directives): |
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189 """Apply the given directives to the stream.""" |
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190 if directives: |
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191 stream = directives[0](iter(stream), ctxt, directives[1:]) |
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192 return stream |
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193 |
| 1 | 194 |
| 195 class AttrsDirective(Directive): | |
| 196 """Implementation of the `py:attrs` template directive. | |
| 197 | |
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198 The value of the `py:attrs` attribute should be a dictionary or a sequence |
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199 of `(name, value)` tuples. The items in that dictionary or sequence are |
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200 added as attributes to the element: |
| 1 | 201 |
| 61 | 202 >>> tmpl = Template('''<ul xmlns:py="http://markup.edgewall.org/"> |
| 1 | 203 ... <li py:attrs="foo">Bar</li> |
| 204 ... </ul>''') | |
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205 >>> print tmpl.generate(foo={'class': 'collapse'}) |
| 1 | 206 <ul> |
| 207 <li class="collapse">Bar</li> | |
| 208 </ul> | |
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209 >>> print tmpl.generate(foo=[('class', 'collapse')]) |
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210 <ul> |
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211 <li class="collapse">Bar</li> |
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212 </ul> |
| 1 | 213 |
| 214 If the value evaluates to `None` (or any other non-truth value), no | |
| 215 attributes are added: | |
| 216 | |
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217 >>> print tmpl.generate(foo=None) |
| 1 | 218 <ul> |
| 219 <li>Bar</li> | |
| 220 </ul> | |
| 221 """ | |
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222 __slots__ = [] |
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223 |
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224 def __call__(self, stream, ctxt, directives): |
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225 def _generate(): |
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226 kind, (tag, attrib), pos = stream.next() |
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227 attrs = self.expr.evaluate(ctxt) |
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228 if attrs: |
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229 attrib = Attrs(attrib[:]) |
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230 if isinstance(attrs, Stream): |
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231 try: |
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232 attrs = iter(attrs).next() |
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233 except StopIteration: |
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234 attrs = [] |
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235 elif not isinstance(attrs, list): # assume it's a dict |
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236 attrs = attrs.items() |
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237 for name, value in attrs: |
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238 if value is None: |
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239 attrib.remove(name) |
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240 else: |
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241 attrib.set(name, unicode(value).strip()) |
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242 yield kind, (tag, attrib), pos |
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243 for event in stream: |
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244 yield event |
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245 |
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246 return _apply_directives(_generate(), ctxt, directives) |
| 1 | 247 |
| 248 | |
| 249 class ContentDirective(Directive): | |
| 250 """Implementation of the `py:content` template directive. | |
| 251 | |
| 252 This directive replaces the content of the element with the result of | |
| 253 evaluating the value of the `py:content` attribute: | |
| 254 | |
| 61 | 255 >>> tmpl = Template('''<ul xmlns:py="http://markup.edgewall.org/"> |
| 1 | 256 ... <li py:content="bar">Hello</li> |
| 257 ... </ul>''') | |
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258 >>> print tmpl.generate(bar='Bye') |
| 1 | 259 <ul> |
| 260 <li>Bye</li> | |
| 261 </ul> | |
| 262 """ | |
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263 __slots__ = [] |
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264 |
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265 def __call__(self, stream, ctxt, directives): |
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266 def _generate(): |
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267 kind, data, pos = stream.next() |
| 101 | 268 if kind is START: |
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269 yield kind, data, pos # emit start tag |
| 69 | 270 yield EXPR, self.expr, pos |
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271 previous = stream.next() |
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272 for event in stream: |
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273 previous = event |
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274 if previous is not None: |
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275 yield previous |
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276 |
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277 return _apply_directives(_generate(), ctxt, directives) |
| 1 | 278 |
| 279 | |
| 280 class DefDirective(Directive): | |
| 281 """Implementation of the `py:def` template directive. | |
| 282 | |
| 283 This directive can be used to create "Named Template Functions", which | |
| 284 are template snippets that are not actually output during normal | |
| 285 processing, but rather can be expanded from expressions in other places | |
| 286 in the template. | |
| 287 | |
| 288 A named template function can be used just like a normal Python function | |
| 289 from template expressions: | |
| 290 | |
| 61 | 291 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
| 1 | 292 ... <p py:def="echo(greeting, name='world')" class="message"> |
| 293 ... ${greeting}, ${name}! | |
| 294 ... </p> | |
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295 ... ${echo('Hi', name='you')} |
| 1 | 296 ... </div>''') |
|
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297 >>> print tmpl.generate(bar='Bye') |
| 1 | 298 <div> |
| 299 <p class="message"> | |
|
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300 Hi, you! |
| 1 | 301 </p> |
| 302 </div> | |
| 303 | |
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304 If a function does not require parameters, the parenthesis can be omitted |
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305 both when defining and when calling it: |
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306 |
| 61 | 307 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
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308 ... <p py:def="helloworld" class="message"> |
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309 ... Hello, world! |
| 1 | 310 ... </p> |
|
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311 ... ${helloworld} |
| 1 | 312 ... </div>''') |
|
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313 >>> print tmpl.generate(bar='Bye') |
| 1 | 314 <div> |
| 315 <p class="message"> | |
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316 Hello, world! |
| 1 | 317 </p> |
| 318 </div> | |
| 319 """ | |
|
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320 __slots__ = ['name', 'args', 'defaults'] |
| 1 | 321 |
|
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322 ATTRIBUTE = 'function' |
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323 |
|
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324 def __init__(self, args, filename=None, lineno=-1, offset=-1): |
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325 Directive.__init__(self, None, filename, lineno, offset) |
| 1 | 326 ast = compiler.parse(args, 'eval').node |
| 327 self.args = [] | |
| 328 self.defaults = {} | |
| 329 if isinstance(ast, compiler.ast.CallFunc): | |
| 330 self.name = ast.node.name | |
| 331 for arg in ast.args: | |
| 332 if isinstance(arg, compiler.ast.Keyword): | |
| 333 self.args.append(arg.name) | |
|
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334 self.defaults[arg.name] = Expression(arg.expr, filename, |
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335 lineno) |
| 1 | 336 else: |
| 337 self.args.append(arg.name) | |
| 338 else: | |
| 339 self.name = ast.name | |
| 340 | |
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341 def __call__(self, stream, ctxt, directives): |
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342 stream = list(stream) |
| 1 | 343 |
|
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344 def function(*args, **kwargs): |
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345 scope = {} |
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346 args = list(args) # make mutable |
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347 for name in self.args: |
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348 if args: |
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349 scope[name] = args.pop(0) |
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350 else: |
|
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351 if name in kwargs: |
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352 val = kwargs.pop(name) |
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353 else: |
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354 val = self.defaults.get(name).evaluate(ctxt) |
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355 scope[name] = val |
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356 ctxt.push(scope) |
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357 for event in _apply_directives(stream, ctxt, directives): |
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358 yield event |
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359 ctxt.pop() |
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360 try: |
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361 function.__name__ = self.name |
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362 except TypeError: |
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363 # Function name can't be set in Python 2.3 |
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364 pass |
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365 |
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366 # Store the function reference in the bottom context frame so that it |
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367 # doesn't get popped off before processing the template has finished |
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368 ctxt.frames[-1][self.name] = function |
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369 |
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370 return [] |
| 1 | 371 |
|
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372 def __repr__(self): |
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373 return '<%s "%s">' % (self.__class__.__name__, self.name) |
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374 |
| 1 | 375 |
| 376 class ForDirective(Directive): | |
| 31 | 377 """Implementation of the `py:for` template directive for repeating an |
| 378 element based on an iterable in the context data. | |
| 1 | 379 |
| 61 | 380 >>> tmpl = Template('''<ul xmlns:py="http://markup.edgewall.org/"> |
| 1 | 381 ... <li py:for="item in items">${item}</li> |
| 382 ... </ul>''') | |
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383 >>> print tmpl.generate(items=[1, 2, 3]) |
| 1 | 384 <ul> |
| 385 <li>1</li><li>2</li><li>3</li> | |
| 386 </ul> | |
| 387 """ | |
| 388 __slots__ = ['targets'] | |
| 389 | |
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390 ATTRIBUTE = 'each' |
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391 |
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392 def __init__(self, value, filename=None, lineno=-1, offset=-1): |
|
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393 if ' in ' not in value: |
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394 raise TemplateSyntaxError('"in" keyword missing in "for" directive', |
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395 filename, lineno, offset) |
|
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396 targets, value = value.split(' in ', 1) |
| 1 | 397 self.targets = [str(name.strip()) for name in targets.split(',')] |
|
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398 Directive.__init__(self, value.strip(), filename, lineno, offset) |
| 1 | 399 |
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400 def __call__(self, stream, ctxt, directives): |
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401 iterable = self.expr.evaluate(ctxt) |
| 101 | 402 if iterable is None: |
| 403 return | |
| 404 | |
| 405 scope = {} | |
| 406 stream = list(stream) | |
| 407 targets = self.targets | |
|
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408 single = len(targets) == 1 |
| 101 | 409 for item in iter(iterable): |
|
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410 if single: |
| 101 | 411 scope[targets[0]] = item |
| 412 else: | |
| 413 for idx, name in enumerate(targets): | |
| 414 scope[name] = item[idx] | |
| 415 ctxt.push(scope) | |
| 416 for event in _apply_directives(stream, ctxt, directives): | |
| 417 yield event | |
| 418 ctxt.pop() | |
| 1 | 419 |
| 420 def __repr__(self): | |
| 421 return '<%s "%s in %s">' % (self.__class__.__name__, | |
| 422 ', '.join(self.targets), self.expr.source) | |
| 423 | |
| 424 | |
| 425 class IfDirective(Directive): | |
| 31 | 426 """Implementation of the `py:if` template directive for conditionally |
| 427 excluding elements from being output. | |
| 1 | 428 |
| 61 | 429 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
| 1 | 430 ... <b py:if="foo">${bar}</b> |
| 431 ... </div>''') | |
|
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432 >>> print tmpl.generate(foo=True, bar='Hello') |
| 1 | 433 <div> |
| 434 <b>Hello</b> | |
| 435 </div> | |
| 436 """ | |
|
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437 __slots__ = [] |
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438 |
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439 ATTRIBUTE = 'test' |
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440 |
|
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441 def __call__(self, stream, ctxt, directives): |
| 1 | 442 if self.expr.evaluate(ctxt): |
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443 return _apply_directives(stream, ctxt, directives) |
| 1 | 444 return [] |
| 445 | |
| 446 | |
| 447 class MatchDirective(Directive): | |
| 448 """Implementation of the `py:match` template directive. | |
|
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449 |
| 61 | 450 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
|
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451 ... <span py:match="greeting"> |
| 1 | 452 ... Hello ${select('@name')} |
| 453 ... </span> | |
| 454 ... <greeting name="Dude" /> | |
| 455 ... </div>''') | |
|
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456 >>> print tmpl.generate() |
| 1 | 457 <div> |
| 458 <span> | |
| 459 Hello Dude | |
| 460 </span> | |
| 461 </div> | |
| 462 """ | |
|
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463 __slots__ = ['path'] |
| 1 | 464 |
|
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465 ATTRIBUTE = 'path' |
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466 |
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467 def __init__(self, value, filename=None, lineno=-1, offset=-1): |
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468 Directive.__init__(self, None, filename, lineno, offset) |
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469 self.path = Path(value, filename, lineno) |
| 1 | 470 |
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471 def __call__(self, stream, ctxt, directives): |
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472 ctxt._match_templates.append((self.path.test(ignore_context=True), |
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473 self.path, list(stream), directives)) |
| 1 | 474 return [] |
| 475 | |
| 476 def __repr__(self): | |
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477 return '<%s "%s">' % (self.__class__.__name__, self.path.source) |
| 1 | 478 |
| 479 | |
| 480 class ReplaceDirective(Directive): | |
| 481 """Implementation of the `py:replace` template directive. | |
| 482 | |
| 31 | 483 This directive replaces the element with the result of evaluating the |
| 484 value of the `py:replace` attribute: | |
| 485 | |
| 61 | 486 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
| 1 | 487 ... <span py:replace="bar">Hello</span> |
| 488 ... </div>''') | |
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489 >>> print tmpl.generate(bar='Bye') |
| 1 | 490 <div> |
| 491 Bye | |
| 492 </div> | |
| 493 | |
| 494 This directive is equivalent to `py:content` combined with `py:strip`, | |
| 495 providing a less verbose way to achieve the same effect: | |
| 496 | |
| 61 | 497 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
| 1 | 498 ... <span py:content="bar" py:strip="">Hello</span> |
| 499 ... </div>''') | |
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500 >>> print tmpl.generate(bar='Bye') |
| 1 | 501 <div> |
| 502 Bye | |
| 503 </div> | |
| 504 """ | |
|
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505 __slots__ = [] |
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506 |
| 54 | 507 def __call__(self, stream, ctxt, directives): |
| 1 | 508 kind, data, pos = stream.next() |
| 69 | 509 yield EXPR, self.expr, pos |
| 1 | 510 |
| 511 | |
| 512 class StripDirective(Directive): | |
| 513 """Implementation of the `py:strip` template directive. | |
| 514 | |
| 515 When the value of the `py:strip` attribute evaluates to `True`, the element | |
| 516 is stripped from the output | |
| 517 | |
| 61 | 518 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
| 1 | 519 ... <div py:strip="True"><b>foo</b></div> |
| 520 ... </div>''') | |
|
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521 >>> print tmpl.generate() |
| 1 | 522 <div> |
| 523 <b>foo</b> | |
| 524 </div> | |
| 525 | |
|
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526 Leaving the attribute value empty is equivalent to a truth value. |
| 1 | 527 |
| 528 This directive is particulary interesting for named template functions or | |
| 529 match templates that do not generate a top-level element: | |
| 530 | |
| 61 | 531 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
| 1 | 532 ... <div py:def="echo(what)" py:strip=""> |
| 533 ... <b>${what}</b> | |
| 534 ... </div> | |
| 535 ... ${echo('foo')} | |
| 536 ... </div>''') | |
|
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537 >>> print tmpl.generate() |
| 1 | 538 <div> |
| 539 <b>foo</b> | |
| 540 </div> | |
| 541 """ | |
|
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542 __slots__ = [] |
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543 |
| 54 | 544 def __call__(self, stream, ctxt, directives): |
|
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545 def _generate(): |
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546 if self.expr: |
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547 strip = self.expr.evaluate(ctxt) |
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548 else: |
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549 strip = True |
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550 if strip: |
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551 stream.next() # skip start tag |
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552 previous = stream.next() |
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553 for event in stream: |
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554 yield previous |
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555 previous = event |
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556 else: |
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557 for event in stream: |
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558 yield event |
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559 |
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560 return _apply_directives(_generate(), ctxt, directives) |
| 1 | 561 |
| 562 | |
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563 class ChooseDirective(Directive): |
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564 """Implementation of the `py:choose` directive for conditionally selecting |
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565 one of several body elements to display. |
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566 |
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567 If the `py:choose` expression is empty the expressions of nested `py:when` |
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568 directives are tested for truth. The first true `py:when` body is output. |
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569 If no `py:when` directive is matched then the fallback directive |
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570 `py:otherwise` will be used. |
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571 |
| 61 | 572 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/" |
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573 ... py:choose=""> |
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574 ... <span py:when="0 == 1">0</span> |
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575 ... <span py:when="1 == 1">1</span> |
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576 ... <span py:otherwise="">2</span> |
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577 ... </div>''') |
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578 >>> print tmpl.generate() |
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579 <div> |
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580 <span>1</span> |
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581 </div> |
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582 |
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583 If the `py:choose` directive contains an expression, the nested `py:when` |
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584 directives are tested for equality to the `py:choose` expression: |
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585 |
| 61 | 586 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/" |
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587 ... py:choose="2"> |
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588 ... <span py:when="1">1</span> |
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589 ... <span py:when="2">2</span> |
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590 ... </div>''') |
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591 >>> print tmpl.generate() |
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592 <div> |
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593 <span>2</span> |
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594 </div> |
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595 |
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596 Behavior is undefined if a `py:choose` block contains content outside a |
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597 `py:when` or `py:otherwise` block. Behavior is also undefined if a |
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598 `py:otherwise` occurs before `py:when` blocks. |
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599 """ |
|
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600 __slots__ = ['matched', 'value'] |
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601 |
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602 ATTRIBUTE = 'test' |
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603 |
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604 def __call__(self, stream, ctxt, directives): |
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605 frame = dict({'_choose.matched': False}) |
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606 if self.expr: |
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607 frame['_choose.value'] = self.expr.evaluate(ctxt) |
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608 ctxt.push(frame) |
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609 for event in _apply_directives(stream, ctxt, directives): |
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610 yield event |
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611 ctxt.pop() |
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612 |
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613 |
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614 class WhenDirective(Directive): |
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615 """Implementation of the `py:when` directive for nesting in a parent with |
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616 the `py:choose` directive. |
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617 |
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618 See the documentation of `py:choose` for usage. |
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619 """ |
|
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620 |
|
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621 ATTRIBUTE = 'test' |
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622 |
| 54 | 623 def __call__(self, stream, ctxt, directives): |
|
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624 matched, frame = ctxt._find('_choose.matched') |
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625 if not frame: |
|
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626 raise TemplateSyntaxError('"when" directives can only be used ' |
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627 'inside a "choose" directive', |
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628 *stream.next()[2]) |
|
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629 if matched: |
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630 return [] |
|
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631 if not self.expr: |
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632 raise TemplateSyntaxError('"when" directive has no test condition', |
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633 *stream.next()[2]) |
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634 value = self.expr.evaluate(ctxt) |
|
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635 if '_choose.value' in frame: |
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636 matched = (value == frame['_choose.value']) |
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637 else: |
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638 matched = bool(value) |
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639 frame['_choose.matched'] = matched |
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640 if not matched: |
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641 return [] |
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642 |
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643 return _apply_directives(stream, ctxt, directives) |
|
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644 |
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645 |
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646 class OtherwiseDirective(Directive): |
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647 """Implementation of the `py:otherwise` directive for nesting in a parent |
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648 with the `py:choose` directive. |
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649 |
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650 See the documentation of `py:choose` for usage. |
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651 """ |
| 54 | 652 def __call__(self, stream, ctxt, directives): |
|
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653 matched, frame = ctxt._find('_choose.matched') |
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654 if not frame: |
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655 raise TemplateSyntaxError('an "otherwise" directive can only be ' |
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656 'used inside a "choose" directive', |
|
166
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657 *stream.next()[2]) |
|
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658 if matched: |
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659 return [] |
|
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660 frame['_choose.matched'] = True |
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661 |
|
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662 return _apply_directives(stream, ctxt, directives) |
|
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663 |
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664 |
|
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665 class WithDirective(Directive): |
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666 """Implementation of the `py:with` template directive, which allows |
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667 shorthand access to variables and expressions. |
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668 |
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669 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
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670 ... <span py:with="y=7; z=x+10">$x $y $z</span> |
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671 ... </div>''') |
|
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672 >>> print tmpl.generate(x=42) |
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673 <div> |
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674 <span>42 7 52</span> |
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675 </div> |
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676 """ |
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677 __slots__ = ['vars'] |
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678 |
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679 ATTRIBUTE = 'vars' |
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680 |
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681 def __init__(self, value, filename=None, lineno=-1, offset=-1): |
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682 Directive.__init__(self, None, filename, lineno, offset) |
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683 self.vars = [] |
| 190 | 684 value = value.strip() |
|
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685 try: |
| 190 | 686 ast = compiler.parse(value, 'exec').node |
| 687 for node in ast.nodes: | |
| 688 if isinstance(node, compiler.ast.Discard): | |
| 689 continue | |
| 690 elif not isinstance(node, compiler.ast.Assign): | |
| 691 raise TemplateSyntaxError('only assignment allowed in ' | |
| 692 'value of the "with" directive', | |
| 693 filename, lineno, offset) | |
| 694 self.vars.append(([n.name for n in node.nodes], | |
| 695 Expression(node.expr, filename, lineno))) | |
|
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696 except SyntaxError, err: |
| 190 | 697 err.msg += ' in expression "%s" of "%s" directive' % (value, |
| 698 self.tagname) | |
|
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699 raise TemplateSyntaxError(err, filename, lineno, |
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700 offset + (err.offset or 0)) |
|
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701 |
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702 def __call__(self, stream, ctxt, directives): |
| 190 | 703 frame = {} |
| 704 ctxt.push(frame) | |
| 705 for names, expr in self.vars: | |
| 706 value = expr.evaluate(ctxt, nocall=True) | |
|
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707 frame.update(dict([(name, value) for name in names])) |
|
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708 for event in _apply_directives(stream, ctxt, directives): |
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709 yield event |
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710 ctxt.pop() |
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711 |
|
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712 def __repr__(self): |
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713 return '<%s "%s">' % (self.__class__.__name__, |
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714 '; '.join(['%s = %s' % (name, expr.source) |
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715 for name, expr in self.vars])) |
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716 |
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717 |
| 1 | 718 class Template(object): |
| 719 """Can parse a template and transform it into the corresponding output | |
| 720 based on context data. | |
| 721 """ | |
| 61 | 722 NAMESPACE = Namespace('http://markup.edgewall.org/') |
| 1 | 723 |
|
17
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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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724 EXPR = StreamEventKind('EXPR') # an expression |
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725 SUB = StreamEventKind('SUB') # a "subprogram" |
|
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726 |
| 1 | 727 directives = [('def', DefDirective), |
| 728 ('match', MatchDirective), | |
| 120 | 729 ('when', WhenDirective), |
| 730 ('otherwise', OtherwiseDirective), | |
| 1 | 731 ('for', ForDirective), |
| 732 ('if', IfDirective), | |
|
53
60f1a556690e
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733 ('choose', ChooseDirective), |
|
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734 ('with', WithDirective), |
| 1 | 735 ('replace', ReplaceDirective), |
| 736 ('content', ContentDirective), | |
| 737 ('attrs', AttrsDirective), | |
|
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738 ('strip', StripDirective)] |
| 1 | 739 _dir_by_name = dict(directives) |
| 740 _dir_order = [directive[1] for directive in directives] | |
| 741 | |
|
21
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742 def __init__(self, source, basedir=None, filename=None): |
| 1 | 743 """Initialize a template from either a string or a file-like object.""" |
| 744 if isinstance(source, basestring): | |
| 745 self.source = StringIO(source) | |
| 746 else: | |
| 747 self.source = source | |
|
21
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748 self.basedir = basedir |
|
172
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749 self.filename = filename |
|
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750 if basedir and filename: |
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751 self.filepath = os.path.join(basedir, filename) |
|
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752 else: |
|
172
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753 self.filepath = None |
| 1 | 754 |
|
23
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755 self.filters = [] |
|
214
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756 self.stream = self.parse() |
| 1 | 757 |
| 758 def __repr__(self): | |
|
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759 return '<%s "%s">' % (self.__class__.__name__, self.filename) |
| 1 | 760 |
| 761 def parse(self): | |
| 762 """Parse the template. | |
| 763 | |
| 764 The parsing stage parses the XML template and constructs a list of | |
| 765 directives that will be executed in the render stage. The input is | |
| 766 split up into literal output (markup that does not depend on the | |
| 767 context data) and actual directives (commands or variable | |
| 768 substitution). | |
| 769 """ | |
| 770 stream = [] # list of events of the "compiled" template | |
| 771 dirmap = {} # temporary mapping of directives to elements | |
| 772 ns_prefix = {} | |
| 773 depth = 0 | |
| 774 | |
|
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775 for kind, data, pos in XMLParser(self.source, filename=self.filename): |
| 1 | 776 |
| 69 | 777 if kind is START_NS: |
| 1 | 778 # Strip out the namespace declaration for template directives |
| 779 prefix, uri = data | |
| 780 if uri == self.NAMESPACE: | |
| 781 ns_prefix[prefix] = uri | |
| 782 else: | |
| 783 stream.append((kind, data, pos)) | |
| 784 | |
| 69 | 785 elif kind is END_NS: |
| 1 | 786 if data in ns_prefix: |
| 787 del ns_prefix[data] | |
| 788 else: | |
| 789 stream.append((kind, data, pos)) | |
| 790 | |
| 69 | 791 elif kind is START: |
| 1 | 792 # Record any directive attributes in start tags |
| 793 tag, attrib = data | |
| 794 directives = [] | |
|
65
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795 strip = False |
|
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796 |
|
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797 if tag in self.NAMESPACE: |
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798 cls = self._dir_by_name.get(tag.localname) |
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799 if cls is None: |
|
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800 raise BadDirectiveError(tag, pos[0], pos[1]) |
|
66
822089ae65ce
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|
801 value = attrib.get(getattr(cls, 'ATTRIBUTE', None), '') |
|
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|
802 directives.append(cls(value, *pos)) |
|
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803 strip = True |
|
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804 |
| 1 | 805 new_attrib = [] |
| 806 for name, value in attrib: | |
|
18
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Actually make use of the `markup.core.Namespace` class, and add a couple of doctests.
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|
807 if name in self.NAMESPACE: |
| 1 | 808 cls = self._dir_by_name.get(name.localname) |
| 809 if cls is None: | |
|
65
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810 raise BadDirectiveError(name, pos[0], pos[1]) |
|
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|
811 directives.append(cls(value, *pos)) |
| 1 | 812 else: |
|
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|
813 if value: |
|
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Empty attributes in templates were being stripped out. Thanks to Jonas for the patch.
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|
814 value = list(self._interpolate(value, *pos)) |
|
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Template expressions are now compiled to Python bytecode.
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|
815 if len(value) == 1 and value[0][0] is TEXT: |
|
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|
816 value = value[0][1] |
|
75
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817 else: |
|
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|
818 value = [(TEXT, u'', pos)] |
| 1 | 819 new_attrib.append((name, value)) |
|
65
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|
820 |
| 1 | 821 if directives: |
|
50
a053ffb834cb
Fix the way multiple directives are applied to a single `SUB` in many cases by making the directives themselves responsible for applying any remaining directives.
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822 directives.sort(lambda a, b: cmp(self._dir_order.index(a.__class__), |
|
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Fix the way multiple directives are applied to a single `SUB` in many cases by making the directives themselves responsible for applying any remaining directives.
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|
823 self._dir_order.index(b.__class__))) |
|
65
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|
824 dirmap[(depth, tag)] = (directives, len(stream), strip) |
| 1 | 825 |
|
182
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Renamed `Attributes` to `Attrs` to reduce the verbosity.
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826 stream.append((kind, (tag, Attrs(new_attrib)), pos)) |
| 1 | 827 depth += 1 |
| 828 | |
| 69 | 829 elif kind is END: |
| 1 | 830 depth -= 1 |
| 831 stream.append((kind, data, pos)) | |
| 832 | |
| 833 # If there have have directive attributes with the corresponding | |
| 834 # start tag, move the events inbetween into a "subprogram" | |
| 835 if (depth, data) in dirmap: | |
|
65
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|
836 directives, start_offset, strip = dirmap.pop((depth, data)) |
| 1 | 837 substream = stream[start_offset:] |
|
65
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838 if strip: |
|
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839 substream = substream[1:-1] |
| 69 | 840 stream[start_offset:] = [(SUB, (directives, substream), |
| 841 pos)] | |
| 1 | 842 |
| 69 | 843 elif kind is TEXT: |
| 1 | 844 for kind, data, pos in self._interpolate(data, *pos): |
| 845 stream.append((kind, data, pos)) | |
| 846 | |
|
89
d4c7617900e3
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cmlenz
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|
847 elif kind is COMMENT: |
|
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|
848 if not data.lstrip().startswith('!'): |
|
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|
849 stream.append((kind, data, pos)) |
|
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|
850 |
| 1 | 851 else: |
| 852 stream.append((kind, data, pos)) | |
| 853 | |
|
214
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Cosmetic change to internal template initialization.
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diff
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|
854 return stream |
| 1 | 855 |
|
184
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Interpolate multiline expressions in templates. Thanks to Christian Boos for reporting the problem and providing the fix.
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|
856 _FULL_EXPR_RE = re.compile(r'(?<!\$)\$\{(.+?)\}', re.DOTALL) |
| 1 | 857 _SHORT_EXPR_RE = re.compile(r'(?<!\$)\$([a-zA-Z][a-zA-Z0-9_\.]*)') |
| 858 | |
|
21
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diff
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|
859 def _interpolate(cls, text, filename=None, lineno=-1, offset=-1): |
| 1 | 860 """Parse the given string and extract expressions. |
| 861 | |
| 862 This method returns a list containing both literal text and `Expression` | |
| 863 objects. | |
|
14
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The `<py:match>` directive now protects itself against simple infinite recursion (see MatchDirective), while still allowing recursion in general.
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864 |
| 1 | 865 @param text: the text to parse |
| 866 @param lineno: the line number at which the text was found (optional) | |
| 867 @param offset: the column number at which the text starts in the source | |
| 868 (optional) | |
| 869 """ | |
|
134
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* Improve the accuracy of line numbers for text nodes, so that reported errors about syntax or evaluation errors in expressions point to the right line (not quite perfect yet, though).
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870 def _interpolate(text, patterns, filename=filename, lineno=lineno, |
|
df44110ca91d
* Improve the accuracy of line numbers for text nodes, so that reported errors about syntax or evaluation errors in expressions point to the right line (not quite perfect yet, though).
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871 offset=offset): |
|
191
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diff
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|
872 for idx, grp in enumerate(patterns.pop(0).split(text)): |
| 1 | 873 if idx % 2: |
|
81
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|
874 try: |
|
191
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|
875 yield EXPR, Expression(grp.strip(), filename, lineno), \ |
|
134
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* Improve the accuracy of line numbers for text nodes, so that reported errors about syntax or evaluation errors in expressions point to the right line (not quite perfect yet, though).
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|
876 (filename, lineno, offset) |
|
81
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|
877 except SyntaxError, err: |
|
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parents:
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|
878 raise TemplateSyntaxError(err, filename, lineno, |
|
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|
879 offset + (err.offset or 0)) |
|
191
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880 elif grp: |
| 1 | 881 if patterns: |
|
191
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|
882 for result in _interpolate(grp, patterns[:]): |
| 1 | 883 yield result |
| 884 else: | |
|
191
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885 yield TEXT, grp.replace('$$', '$'), \ |
|
134
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* Improve the accuracy of line numbers for text nodes, so that reported errors about syntax or evaluation errors in expressions point to the right line (not quite perfect yet, though).
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|
886 (filename, lineno, offset) |
|
191
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|
887 if '\n' in grp: |
|
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|
888 lines = grp.splitlines() |
|
134
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* Improve the accuracy of line numbers for text nodes, so that reported errors about syntax or evaluation errors in expressions point to the right line (not quite perfect yet, though).
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|
889 lineno += len(lines) - 1 |
|
df44110ca91d
* Improve the accuracy of line numbers for text nodes, so that reported errors about syntax or evaluation errors in expressions point to the right line (not quite perfect yet, though).
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|
890 offset += len(lines[-1]) |
|
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* Improve the accuracy of line numbers for text nodes, so that reported errors about syntax or evaluation errors in expressions point to the right line (not quite perfect yet, though).
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891 else: |
|
191
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|
892 offset += len(grp) |
|
74
3c271699c398
Fix expression interpolation where both shorthand notation and full notation are used inside a single text node. Thanks Jonas.
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diff
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|
893 return _interpolate(text, [cls._FULL_EXPR_RE, cls._SHORT_EXPR_RE]) |
| 1 | 894 _interpolate = classmethod(_interpolate) |
| 895 | |
|
149
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
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diff
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|
896 def generate(self, *args, **kwargs): |
|
29
4b6cee37ce62
* Minor simplification of template directives: they no longer get passed the template instance and the position, as no directive was actually using
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parents:
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diff
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|
897 """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
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diff
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|
898 |
|
149
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
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|
899 Any keyword arguments are made available to the template as context |
|
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
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|
900 data. |
|
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
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|
901 |
|
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
cmlenz
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|
902 Only one positional argument is accepted: if it is provided, it must be |
|
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`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
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|
903 an instance of the `Context` class, and keyword arguments are ignored. |
|
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`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
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diff
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|
904 This calling style is used for internal processing. |
|
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
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|
905 |
|
29
4b6cee37ce62
* Minor simplification of template directives: they no longer get passed the template instance and the position, as no directive was actually using
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parents:
27
diff
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|
906 @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
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diff
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|
907 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
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parents:
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diff
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|
908 """ |
|
149
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
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diff
changeset
|
909 if args: |
|
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`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
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|
910 assert len(args) == 1 |
|
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
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diff
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|
911 ctxt = args[0] |
| 173 | 912 if ctxt is None: |
| 913 ctxt = Context(**kwargs) | |
|
149
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`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
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diff
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|
914 assert isinstance(ctxt, Context) |
|
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diff
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|
915 else: |
|
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|
916 ctxt = Context(**kwargs) |
|
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
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diff
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|
917 |
| 69 | 918 stream = self.stream |
|
208
835203f3b8fd
Cleanup the application of template processing steps (flatten, eval, match) so that they are only performed when necessary. Results in a small performance boost, and also fixes #35.
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diff
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|
919 for filter_ in [self._flatten, self._eval, self._match] + self.filters: |
|
35
3bc4778787c5
Simplify template processing model by removing dynamically generated `SUB` events.
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diff
changeset
|
920 stream = filter_(iter(stream), ctxt) |
|
3bc4778787c5
Simplify template processing model by removing dynamically generated `SUB` events.
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diff
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|
921 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.
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diff
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|
922 |
|
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
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diff
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|
923 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
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diff
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|
924 """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
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diff
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|
925 `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
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diff
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|
926 """ |
|
208
835203f3b8fd
Cleanup the application of template processing steps (flatten, eval, match) so that they are only performed when necessary. Results in a small performance boost, and also fixes #35.
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|
927 filters = (self._flatten, self._eval) |
|
81
cc034182061e
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diff
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|
928 |
|
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:
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diff
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|
929 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:
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diff
changeset
|
930 |
|
81
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
931 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.
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diff
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|
932 # 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
|
933 # 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
|
934 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
|
935 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
|
936 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
|
937 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
|
938 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
|
939 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
|
940 values = [] |
|
185
8e5a3048b359
Fix for #34: `py:def` macros can now be invoked from within expressions in attribute values.
cmlenz
parents:
184
diff
changeset
|
941 for subkind, subdata, subpos in self._eval(substream, |
|
8e5a3048b359
Fix for #34: `py:def` macros can now be invoked from within expressions in attribute values.
cmlenz
parents:
184
diff
changeset
|
942 ctxt): |
|
8e5a3048b359
Fix for #34: `py:def` macros can now be invoked from within expressions in attribute values.
cmlenz
parents:
184
diff
changeset
|
943 if subkind is TEXT: |
|
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
944 values.append(subdata) |
|
185
8e5a3048b359
Fix for #34: `py:def` macros can now be invoked from within expressions in attribute values.
cmlenz
parents:
184
diff
changeset
|
945 value = [x for x in values if x is not None] |
|
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
946 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
|
947 continue |
|
23
00835401c8cc
Separate match and eval filters from the include and user-supplied filters.
cmlenz
parents:
22
diff
changeset
|
948 new_attrib.append((name, u''.join(value))) |
|
182
41db0260ebb1
Renamed `Attributes` to `Attrs` to reduce the verbosity.
cmlenz
parents:
181
diff
changeset
|
949 yield kind, (tag, Attrs(new_attrib)), pos |
|
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
950 |
| 69 | 951 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
|
952 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
|
953 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
|
954 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
|
955 |
|
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
956 # 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
|
957 # 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
|
958 # 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
|
959 if isinstance(result, basestring): |
| 69 | 960 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
|
961 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
|
962 # 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
|
963 # 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
|
964 try: |
|
206
d122ff386411
`TypeError`s raised by `py:def` macros (and other expressions producing streams) are no longer silently ignored. Closes #44.
cmlenz
parents:
205
diff
changeset
|
965 substream = _ensure(iter(result)) |
|
d122ff386411
`TypeError`s raised by `py:def` macros (and other expressions producing streams) are no longer silently ignored. Closes #44.
cmlenz
parents:
205
diff
changeset
|
966 except TypeError: |
|
d122ff386411
`TypeError`s raised by `py:def` macros (and other expressions producing streams) are no longer silently ignored. Closes #44.
cmlenz
parents:
205
diff
changeset
|
967 # Neither a string nor an iterable, so just pass it |
|
d122ff386411
`TypeError`s raised by `py:def` macros (and other expressions producing streams) are no longer silently ignored. Closes #44.
cmlenz
parents:
205
diff
changeset
|
968 # through |
|
d122ff386411
`TypeError`s raised by `py:def` macros (and other expressions producing streams) are no longer silently ignored. Closes #44.
cmlenz
parents:
205
diff
changeset
|
969 yield TEXT, unicode(result), pos |
|
d122ff386411
`TypeError`s raised by `py:def` macros (and other expressions producing streams) are no longer silently ignored. Closes #44.
cmlenz
parents:
205
diff
changeset
|
970 else: |
|
81
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
971 for filter_ in filters: |
|
77
f1aa49c759b2
* Simplify implementation of the individual XPath tests (use closures instead of callable classes)
cmlenz
parents:
75
diff
changeset
|
972 substream = filter_(substream, ctxt) |
|
f1aa49c759b2
* Simplify implementation of the individual XPath tests (use closures instead of callable classes)
cmlenz
parents:
75
diff
changeset
|
973 for event in substream: |
|
35
3bc4778787c5
Simplify template processing model by removing dynamically generated `SUB` events.
cmlenz
parents:
31
diff
changeset
|
974 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
|
975 |
|
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
|
976 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
|
977 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
|
978 |
|
23
00835401c8cc
Separate match and eval filters from the include and user-supplied filters.
cmlenz
parents:
22
diff
changeset
|
979 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
|
980 """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
|
981 for kind, data, pos in stream: |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
982 if kind is SUB: |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
983 # 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
|
984 # events to which those directives should be applied |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
985 directives, substream = data |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
986 substream = _apply_directives(substream, ctxt, directives) |
|
208
835203f3b8fd
Cleanup the application of template processing steps (flatten, eval, match) so that they are only performed when necessary. Results in a small performance boost, and also fixes #35.
cmlenz
parents:
206
diff
changeset
|
987 for event in self._flatten(substream, ctxt): |
|
81
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
988 yield event |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
989 else: |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
990 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
|
991 |
|
36
57d607f25484
Fix for #7: match templates no longer process their own output.
cmlenz
parents:
35
diff
changeset
|
992 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
|
993 """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
|
994 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
|
995 """ |
|
36
57d607f25484
Fix for #7: match templates no longer process their own output.
cmlenz
parents:
35
diff
changeset
|
996 if match_templates is None: |
|
57d607f25484
Fix for #7: match templates no longer process their own output.
cmlenz
parents:
35
diff
changeset
|
997 match_templates = ctxt._match_templates |
|
57d607f25484
Fix for #7: match templates no longer process their own output.
cmlenz
parents:
35
diff
changeset
|
998 |
|
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
|
999 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
|
1000 |
|
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
1001 # 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
|
1002 # 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
|
1003 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
|
1004 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
|
1005 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
|
1006 |
|
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
|
1007 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
|
1008 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
|
1009 |
|
179
a2e0a7986d19
Implemented support for XPath variables in predicates (#31).
cmlenz
parents:
176
diff
changeset
|
1010 if test(kind, data, pos, ctxt) is True: |
|
208
835203f3b8fd
Cleanup the application of template processing steps (flatten, eval, match) so that they are only performed when necessary. Results in a small performance boost, and also fixes #35.
cmlenz
parents:
206
diff
changeset
|
1011 |
|
835203f3b8fd
Cleanup the application of template processing steps (flatten, eval, match) so that they are only performed when necessary. Results in a small performance boost, and also fixes #35.
cmlenz
parents:
206
diff
changeset
|
1012 # Let the remaining match templates know about the event so |
|
835203f3b8fd
Cleanup the application of template processing steps (flatten, eval, match) so that they are only performed when necessary. Results in a small performance boost, and also fixes #35.
cmlenz
parents:
206
diff
changeset
|
1013 # they get a chance to update their internal state |
|
835203f3b8fd
Cleanup the application of template processing steps (flatten, eval, match) so that they are only performed when necessary. Results in a small performance boost, and also fixes #35.
cmlenz
parents:
206
diff
changeset
|
1014 for test in [mt[0] for mt in match_templates[idx + 1:]]: |
|
835203f3b8fd
Cleanup the application of template processing steps (flatten, eval, match) so that they are only performed when necessary. Results in a small performance boost, and also fixes #35.
cmlenz
parents:
206
diff
changeset
|
1015 test(kind, data, pos, ctxt) |
|
835203f3b8fd
Cleanup the application of template processing steps (flatten, eval, match) so that they are only performed when necessary. Results in a small performance boost, and also fixes #35.
cmlenz
parents:
206
diff
changeset
|
1016 |
|
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
|
1017 # 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
|
1018 # 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
|
1019 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
|
1020 depth = 1 |
|
208
835203f3b8fd
Cleanup the application of template processing steps (flatten, eval, match) so that they are only performed when necessary. Results in a small performance boost, and also fixes #35.
cmlenz
parents:
206
diff
changeset
|
1021 stream = self._match(stream, ctxt) |
|
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
1022 while depth > 0: |
| 73 | 1023 kind, data, pos = stream.next() |
| 1024 if kind is START: | |
| 1025 depth += 1 | |
| 1026 elif kind is END: | |
| 1027 depth -= 1 | |
| 1028 content.append((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
|
1029 |
|
208
835203f3b8fd
Cleanup the application of template processing steps (flatten, eval, match) so that they are only performed when necessary. Results in a small performance boost, and also fixes #35.
cmlenz
parents:
206
diff
changeset
|
1030 # Make the select() function available in the body of the |
|
835203f3b8fd
Cleanup the application of template processing steps (flatten, eval, match) so that they are only performed when necessary. Results in a small performance boost, and also fixes #35.
cmlenz
parents:
206
diff
changeset
|
1031 # match template |
|
835203f3b8fd
Cleanup the application of template processing steps (flatten, eval, match) so that they are only performed when necessary. Results in a small performance boost, and also fixes #35.
cmlenz
parents:
206
diff
changeset
|
1032 def select(path): |
|
835203f3b8fd
Cleanup the application of template processing steps (flatten, eval, match) so that they are only performed when necessary. Results in a small performance boost, and also fixes #35.
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1033 return Stream(content).select(path) |
|
95
7d6426183a90
Improve performance of push/pop operations on the context.
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1034 ctxt.push(dict(select=select)) |
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36
57d607f25484
Fix for #7: match templates no longer process their own output.
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1035 |
|
208
835203f3b8fd
Cleanup the application of template processing steps (flatten, eval, match) so that they are only performed when necessary. Results in a small performance boost, and also fixes #35.
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1036 # Recursively process the output |
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78
fa4bafcbe4c7
Minor improvements to how directives are applied in template processing.
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1037 template = _apply_directives(template, ctxt, directives) |
|
210
c0c70dc5bf95
Fix regression introduced in [258]. More fixes needed?
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1038 for event in self._match(self._eval(self._flatten(template, |
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Fix regression introduced in [258]. More fixes needed?
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1039 ctxt), |
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Fix regression introduced in [258]. More fixes needed?
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1040 ctxt), ctxt, |
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Fix regression introduced in [258]. More fixes needed?
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1041 match_templates[:idx] + |
| 69 | 1042 match_templates[idx + 1:]): |
|
35
3bc4778787c5
Simplify template processing model by removing dynamically generated `SUB` events.
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1043 yield event |
| 116 | 1044 |
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35
3bc4778787c5
Simplify template processing model by removing dynamically generated `SUB` events.
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1045 ctxt.pop() |
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17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
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1046 break |
| 69 | 1047 |
| 1048 else: # no matches | |
|
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ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
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1049 yield kind, data, pos |
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ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
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1050 |
| 1 | 1051 |
| 69 | 1052 EXPR = Template.EXPR |
| 1053 SUB = Template.SUB | |
| 1054 | |
| 1055 | |
| 1 | 1056 class TemplateLoader(object): |
| 1057 """Responsible for loading templates from files on the specified search | |
| 1058 path. | |
| 1059 | |
| 1060 >>> import tempfile | |
| 1061 >>> fd, path = tempfile.mkstemp(suffix='.html', prefix='template') | |
| 1062 >>> os.write(fd, '<p>$var</p>') | |
| 1063 11 | |
| 1064 >>> os.close(fd) | |
| 1065 | |
| 1066 The template loader accepts a list of directory paths that are then used | |
| 1067 when searching for template files, in the given order: | |
| 1068 | |
| 1069 >>> loader = TemplateLoader([os.path.dirname(path)]) | |
| 1070 | |
| 1071 The `load()` method first checks the template cache whether the requested | |
| 1072 template has already been loaded. If not, it attempts to locate the | |
| 1073 template file, and returns the corresponding `Template` object: | |
| 1074 | |
| 1075 >>> template = loader.load(os.path.basename(path)) | |
| 1076 >>> isinstance(template, Template) | |
| 1077 True | |
| 1078 | |
| 1079 Template instances are cached: requesting a template with the same name | |
| 1080 results in the same instance being returned: | |
| 1081 | |
| 1082 >>> loader.load(os.path.basename(path)) is template | |
| 1083 True | |
|
152
064ba1078f92
Add some tests for relative template includes (see #27).
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1084 |
|
064ba1078f92
Add some tests for relative template includes (see #27).
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1085 >>> os.remove(path) |
| 1 | 1086 """ |
| 1087 def __init__(self, search_path=None, auto_reload=False): | |
| 1088 """Create the template laoder. | |
| 1089 | |
| 1090 @param search_path: a list of absolute path names that should be | |
| 1091 searched for template files | |
| 1092 @param auto_reload: whether to check the last modification time of | |
| 1093 template files, and reload them if they have changed | |
| 1094 """ | |
| 1095 self.search_path = search_path | |
| 1096 if self.search_path is None: | |
| 1097 self.search_path = [] | |
| 1098 self.auto_reload = auto_reload | |
| 1099 self._cache = {} | |
| 1100 self._mtime = {} | |
| 1101 | |
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* Include paths are now interpreted relative to the path of the including template. Closes #3.
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1102 def load(self, filename, relative_to=None): |
| 1 | 1103 """Load the template with the given name. |
| 1104 | |
|
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Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
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1105 If the `filename` parameter is relative, this method searches the search |
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31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
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1106 path trying to locate a template matching the given name. If the file |
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31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
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1107 name is an absolute path, the search path is not bypassed. |
| 1 | 1108 |
|
22
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Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
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1109 If requested template is not found, a `TemplateNotFound` exception is |
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1110 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.
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1111 parsed template. |
|
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
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1112 |
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31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
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1113 Template instances are cached to avoid having to parse the same |
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31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
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1114 template file more than once. Thus, subsequent calls of this method |
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1115 with the same template file name will return the same `Template` |
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Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
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1116 object (unless the `auto_reload` option is enabled and the file was |
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31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
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1117 changed since the last parse.) |
| 1 | 1118 |
|
21
eca77129518a
* Include paths are now interpreted relative to the path of the including template. Closes #3.
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1119 If the `relative_to` parameter is provided, the `filename` is |
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eca77129518a
* Include paths are now interpreted relative to the path of the including template. Closes #3.
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1120 interpreted as being relative to that path. |
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* Include paths are now interpreted relative to the path of the including template. Closes #3.
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1121 |
| 1 | 1122 @param filename: the relative path of the template file to load |
|
21
eca77129518a
* Include paths are now interpreted relative to the path of the including template. Closes #3.
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1123 @param relative_to: the filename of the template from which the new |
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* Include paths are now interpreted relative to the path of the including template. Closes #3.
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1124 template is being loaded, or `None` if the template is being loaded |
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eca77129518a
* Include paths are now interpreted relative to the path of the including template. Closes #3.
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1125 directly |
| 1 | 1126 """ |
| 69 | 1127 from markup.filters import IncludeFilter |
| 1128 | |
|
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1129 if relative_to: |
| 153 | 1130 filename = os.path.join(os.path.dirname(relative_to), filename) |
| 1 | 1131 filename = os.path.normpath(filename) |
|
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1132 |
|
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1133 # First check the cache to avoid reparsing the same file |
| 1 | 1134 try: |
| 1135 tmpl = self._cache[filename] | |
| 1136 if not self.auto_reload or \ | |
|
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* Include paths are now interpreted relative to the path of the including template. Closes #3.
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1137 os.path.getmtime(tmpl.filepath) == self._mtime[filename]: |
| 1 | 1138 return tmpl |
| 1139 except KeyError: | |
| 1140 pass | |
|
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Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
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1141 |
|
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
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1142 # Bypass the search path if the filename is absolute |
|
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1143 search_path = self.search_path |
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1144 if os.path.isabs(filename): |
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1145 search_path = [os.path.dirname(filename)] |
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1146 |
|
176
7efcbf6b1cf2
Fix control flow for error message when template search path is empty.
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1147 if not search_path: |
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Fix control flow for error message when template search path is empty.
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1148 raise TemplateError('Search path for templates not configured') |
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1149 |
|
22
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1150 for dirname in search_path: |
| 1 | 1151 filepath = os.path.join(dirname, filename) |
| 1152 try: | |
|
133
b9a0031d4bbb
Minor cleanup and performance improvement for the builder module.
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1153 fileobj = open(filepath, 'U') |
| 1 | 1154 try: |
|
21
eca77129518a
* Include paths are now interpreted relative to the path of the including template. Closes #3.
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1155 tmpl = Template(fileobj, basedir=dirname, filename=filename) |
|
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
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1156 tmpl.filters.append(IncludeFilter(self)) |
| 1 | 1157 finally: |
| 1158 fileobj.close() | |
| 1159 self._cache[filename] = tmpl | |
| 1160 self._mtime[filename] = os.path.getmtime(filepath) | |
| 1161 return tmpl | |
| 1162 except IOError: | |
| 1163 continue | |
| 175 | 1164 |
| 1 | 1165 raise TemplateNotFound(filename, self.search_path) |