Mercurial > genshi > genshi-test
annotate markup/template.py @ 170:f1ac0510d392
Allow initialization of `Attributes` with keyword arguments.
| author | cmlenz |
|---|---|
| date | Fri, 18 Aug 2006 12:40:55 +0000 |
| parents | 718cba809cea |
| children | 4b4e80b2b0b5 |
| rev | line source |
|---|---|
| 1 | 1 # -*- coding: utf-8 -*- |
| 2 # | |
|
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3 # Copyright (C) 2006 Edgewall Software |
| 1 | 4 # All rights reserved. |
| 5 # | |
| 6 # This software is licensed as described in the file COPYING, which | |
| 7 # you should have received as part of this distribution. The terms | |
|
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8 # are also available at http://markup.edgewall.org/wiki/License. |
| 1 | 9 # |
| 10 # This software consists of voluntary contributions made by many | |
| 11 # individuals. For the exact contribution history, see the revision | |
|
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12 # history and logs, available at http://markup.edgewall.org/log/. |
| 1 | 13 |
| 82 | 14 """Implementation of the template engine.""" |
| 1 | 15 |
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16 try: |
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17 from collections import deque |
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18 except ImportError: |
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19 class deque(list): |
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20 def appendleft(self, x): self.insert(0, x) |
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21 def popleft(self): return self.pop(0) |
| 1 | 22 import compiler |
| 23 import os | |
| 24 import re | |
| 25 from StringIO import StringIO | |
| 26 | |
|
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27 from markup.core import Attributes, Namespace, Stream, StreamEventKind, _ensure |
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28 from markup.core import START, END, START_NS, END_NS, TEXT, COMMENT |
| 1 | 29 from markup.eval import Expression |
| 69 | 30 from markup.input import XMLParser |
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31 from markup.path import Path |
| 1 | 32 |
|
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33 __all__ = ['BadDirectiveError', 'TemplateError', 'TemplateSyntaxError', |
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34 'TemplateNotFound', 'Template', 'TemplateLoader'] |
| 1 | 35 |
| 36 | |
| 37 class TemplateError(Exception): | |
| 38 """Base exception class for errors related to template processing.""" | |
| 39 | |
| 40 | |
| 41 class TemplateSyntaxError(TemplateError): | |
| 42 """Exception raised when an expression in a template causes a Python syntax | |
| 43 error.""" | |
| 44 | |
| 45 def __init__(self, message, filename='<string>', lineno=-1, offset=-1): | |
| 46 if isinstance(message, SyntaxError) and message.lineno is not None: | |
| 47 message = str(message).replace(' (line %d)' % message.lineno, '') | |
| 80 | 48 message = '%s (%s, line %d)' % (message, filename, lineno) |
| 1 | 49 TemplateError.__init__(self, message) |
| 50 self.filename = filename | |
| 51 self.lineno = lineno | |
| 52 self.offset = offset | |
| 53 | |
| 54 | |
| 55 class BadDirectiveError(TemplateSyntaxError): | |
| 56 """Exception raised when an unknown directive is encountered when parsing | |
| 57 a template. | |
| 58 | |
| 59 An unknown directive is any attribute using the namespace for directives, | |
| 60 with a local name that doesn't match any registered directive. | |
| 61 """ | |
| 62 | |
| 63 def __init__(self, name, filename='<string>', lineno=-1): | |
| 80 | 64 msg = 'bad directive "%s" (%s, line %d)' % (name.localname, filename, |
| 65 lineno) | |
| 66 TemplateSyntaxError.__init__(self, msg, 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 |
| 115 def get(self, key): | |
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116 """Get a variable's value, starting at the current scope and going |
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117 upward. |
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118 """ |
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119 for frame in self.frames: |
| 1 | 120 if key in frame: |
| 121 return frame[key] | |
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122 __getitem__ = get |
| 1 | 123 |
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124 def push(self, data): |
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125 """Push a new scope on the stack.""" |
| 1 | 126 |
| 127 def pop(self): | |
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128 """Pop the top-most scope from the stack.""" |
| 1 | 129 |
| 130 | |
| 131 class Directive(object): | |
| 132 """Abstract base class for template directives. | |
| 133 | |
| 54 | 134 A directive is basically a callable that takes three positional arguments: |
| 135 `ctxt` is the template data context, `stream` is an iterable over the | |
| 136 events that the directive applies to, and `directives` is is a list of | |
| 137 other directives on the same stream that need to be applied. | |
| 1 | 138 |
| 139 Directives can be "anonymous" or "registered". Registered directives can be | |
| 140 applied by the template author using an XML attribute with the | |
| 141 corresponding name in the template. Such directives should be subclasses of | |
| 31 | 142 this base class that can be instantiated with the value of the directive |
| 143 attribute as parameter. | |
| 1 | 144 |
| 145 Anonymous directives are simply functions conforming to the protocol | |
| 146 described above, and can only be applied programmatically (for example by | |
| 147 template filters). | |
| 148 """ | |
| 149 __slots__ = ['expr'] | |
| 150 | |
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151 def __init__(self, value, filename=None, lineno=-1, offset=-1): |
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152 try: |
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153 self.expr = value and Expression(value, filename, lineno) or None |
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154 except SyntaxError, err: |
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155 err.msg += ' in expression "%s" of "%s" directive' % (value, |
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156 self.name) |
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157 raise TemplateSyntaxError(err, filename, lineno, |
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158 offset + (err.offset or 0)) |
| 1 | 159 |
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160 def __call__(self, stream, ctxt, directives): |
| 1 | 161 raise NotImplementedError |
| 162 | |
| 163 def __repr__(self): | |
| 164 expr = '' | |
| 165 if self.expr is not None: | |
| 166 expr = ' "%s"' % self.expr.source | |
| 167 return '<%s%s>' % (self.__class__.__name__, expr) | |
| 168 | |
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169 def name(self): |
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170 """Return the local name of the directive as it is used in templates.""" |
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171 return self.__class__.__name__.lower().replace('directive', '') |
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172 name = property(name) |
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173 |
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174 |
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175 def _apply_directives(stream, ctxt, directives): |
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176 """Apply the given directives to the stream.""" |
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177 if directives: |
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178 stream = directives[0](iter(stream), ctxt, directives[1:]) |
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179 return stream |
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180 |
| 1 | 181 |
| 182 class AttrsDirective(Directive): | |
| 183 """Implementation of the `py:attrs` template directive. | |
| 184 | |
| 185 The value of the `py:attrs` attribute should be a dictionary. The keys and | |
| 186 values of that dictionary will be added as attributes to the element: | |
| 187 | |
| 61 | 188 >>> tmpl = Template('''<ul xmlns:py="http://markup.edgewall.org/"> |
| 1 | 189 ... <li py:attrs="foo">Bar</li> |
| 190 ... </ul>''') | |
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191 >>> print tmpl.generate(foo={'class': 'collapse'}) |
| 1 | 192 <ul> |
| 193 <li class="collapse">Bar</li> | |
| 194 </ul> | |
| 195 | |
| 196 If the value evaluates to `None` (or any other non-truth value), no | |
| 197 attributes are added: | |
| 198 | |
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199 >>> print tmpl.generate(foo=None) |
| 1 | 200 <ul> |
| 201 <li>Bar</li> | |
| 202 </ul> | |
| 203 """ | |
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204 __slots__ = [] |
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205 |
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206 def __call__(self, stream, ctxt, directives): |
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207 def _generate(): |
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208 kind, (tag, attrib), pos = stream.next() |
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209 attrs = self.expr.evaluate(ctxt) |
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210 if attrs: |
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211 attrib = Attributes(attrib[:]) |
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212 if isinstance(attrs, Stream): |
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213 try: |
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214 attrs = iter(attrs).next() |
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215 except StopIteration: |
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216 attrs = [] |
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217 elif not isinstance(attrs, list): # assume it's a dict |
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218 attrs = attrs.items() |
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219 for name, value in attrs: |
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220 if value is None: |
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221 attrib.remove(name) |
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222 else: |
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223 attrib.set(name, unicode(value).strip()) |
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224 yield kind, (tag, attrib), pos |
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225 for event in stream: |
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226 yield event |
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227 |
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228 return _apply_directives(_generate(), ctxt, directives) |
| 1 | 229 |
| 230 | |
| 231 class ContentDirective(Directive): | |
| 232 """Implementation of the `py:content` template directive. | |
| 233 | |
| 234 This directive replaces the content of the element with the result of | |
| 235 evaluating the value of the `py:content` attribute: | |
| 236 | |
| 61 | 237 >>> tmpl = Template('''<ul xmlns:py="http://markup.edgewall.org/"> |
| 1 | 238 ... <li py:content="bar">Hello</li> |
| 239 ... </ul>''') | |
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240 >>> print tmpl.generate(bar='Bye') |
| 1 | 241 <ul> |
| 242 <li>Bye</li> | |
| 243 </ul> | |
| 244 """ | |
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245 __slots__ = [] |
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246 |
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247 def __call__(self, stream, ctxt, directives): |
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248 def _generate(): |
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249 kind, data, pos = stream.next() |
| 101 | 250 if kind is START: |
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251 yield kind, data, pos # emit start tag |
| 69 | 252 yield EXPR, self.expr, pos |
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253 previous = stream.next() |
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254 for event in stream: |
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255 previous = event |
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256 if previous is not None: |
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257 yield previous |
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258 |
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259 return _apply_directives(_generate(), ctxt, directives) |
| 1 | 260 |
| 261 | |
| 262 class DefDirective(Directive): | |
| 263 """Implementation of the `py:def` template directive. | |
| 264 | |
| 265 This directive can be used to create "Named Template Functions", which | |
| 266 are template snippets that are not actually output during normal | |
| 267 processing, but rather can be expanded from expressions in other places | |
| 268 in the template. | |
| 269 | |
| 270 A named template function can be used just like a normal Python function | |
| 271 from template expressions: | |
| 272 | |
| 61 | 273 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
| 1 | 274 ... <p py:def="echo(greeting, name='world')" class="message"> |
| 275 ... ${greeting}, ${name}! | |
| 276 ... </p> | |
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277 ... ${echo('Hi', name='you')} |
| 1 | 278 ... </div>''') |
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279 >>> print tmpl.generate(bar='Bye') |
| 1 | 280 <div> |
| 281 <p class="message"> | |
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282 Hi, you! |
| 1 | 283 </p> |
| 284 </div> | |
| 285 | |
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286 If a function does not require parameters, the parenthesis can be omitted |
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287 both when defining and when calling it: |
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288 |
| 61 | 289 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
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290 ... <p py:def="helloworld" class="message"> |
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291 ... Hello, world! |
| 1 | 292 ... </p> |
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293 ... ${helloworld} |
| 1 | 294 ... </div>''') |
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295 >>> print tmpl.generate(bar='Bye') |
| 1 | 296 <div> |
| 297 <p class="message"> | |
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298 Hello, world! |
| 1 | 299 </p> |
| 300 </div> | |
| 301 """ | |
|
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302 __slots__ = ['name', 'args', 'defaults'] |
| 1 | 303 |
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304 ATTRIBUTE = 'function' |
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305 |
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306 def __init__(self, args, filename=None, lineno=-1, offset=-1): |
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307 Directive.__init__(self, None, filename, lineno, offset) |
| 1 | 308 ast = compiler.parse(args, 'eval').node |
| 309 self.args = [] | |
| 310 self.defaults = {} | |
| 311 if isinstance(ast, compiler.ast.CallFunc): | |
| 312 self.name = ast.node.name | |
| 313 for arg in ast.args: | |
| 314 if isinstance(arg, compiler.ast.Keyword): | |
| 315 self.args.append(arg.name) | |
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316 self.defaults[arg.name] = Expression(arg.expr, filename, |
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317 lineno) |
| 1 | 318 else: |
| 319 self.args.append(arg.name) | |
| 320 else: | |
| 321 self.name = ast.name | |
| 322 | |
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323 def __call__(self, stream, ctxt, directives): |
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324 stream = list(stream) |
| 1 | 325 |
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326 def function(*args, **kwargs): |
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327 scope = {} |
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328 args = list(args) # make mutable |
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329 for name in self.args: |
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330 if args: |
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331 scope[name] = args.pop(0) |
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332 else: |
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333 if name in kwargs: |
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334 val = kwargs.pop(name) |
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335 else: |
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336 val = self.defaults.get(name).evaluate(ctxt) |
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337 scope[name] = val |
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338 ctxt.push(scope) |
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339 for event in _apply_directives(stream, ctxt, directives): |
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340 yield event |
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341 ctxt.pop() |
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342 try: |
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343 function.__name__ = self.name |
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344 except TypeError: |
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345 # Function name can't be set in Python 2.3 |
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346 pass |
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347 |
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348 # Store the function reference in the bottom context frame so that it |
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349 # doesn't get popped off before processing the template has finished |
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350 ctxt.frames[-1][self.name] = function |
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351 |
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352 return [] |
| 1 | 353 |
| 354 | |
| 355 class ForDirective(Directive): | |
| 31 | 356 """Implementation of the `py:for` template directive for repeating an |
| 357 element based on an iterable in the context data. | |
| 1 | 358 |
| 61 | 359 >>> tmpl = Template('''<ul xmlns:py="http://markup.edgewall.org/"> |
| 1 | 360 ... <li py:for="item in items">${item}</li> |
| 361 ... </ul>''') | |
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362 >>> print tmpl.generate(items=[1, 2, 3]) |
| 1 | 363 <ul> |
| 364 <li>1</li><li>2</li><li>3</li> | |
| 365 </ul> | |
| 366 """ | |
| 367 __slots__ = ['targets'] | |
| 368 | |
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369 ATTRIBUTE = 'each' |
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370 |
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371 def __init__(self, value, filename=None, lineno=-1, offset=-1): |
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372 targets, value = value.split(' in ', 1) |
| 1 | 373 self.targets = [str(name.strip()) for name in targets.split(',')] |
|
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374 Directive.__init__(self, value.strip(), filename, lineno, offset) |
| 1 | 375 |
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376 def __call__(self, stream, ctxt, directives): |
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377 iterable = self.expr.evaluate(ctxt) |
| 101 | 378 if iterable is None: |
| 379 return | |
| 380 | |
| 381 scope = {} | |
| 382 stream = list(stream) | |
| 383 targets = self.targets | |
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384 single = len(targets) == 1 |
| 101 | 385 for item in iter(iterable): |
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386 if single: |
| 101 | 387 scope[targets[0]] = item |
| 388 else: | |
| 389 for idx, name in enumerate(targets): | |
| 390 scope[name] = item[idx] | |
| 391 ctxt.push(scope) | |
| 392 for event in _apply_directives(stream, ctxt, directives): | |
| 393 yield event | |
| 394 ctxt.pop() | |
| 1 | 395 |
| 396 def __repr__(self): | |
| 397 return '<%s "%s in %s">' % (self.__class__.__name__, | |
| 398 ', '.join(self.targets), self.expr.source) | |
| 399 | |
| 400 | |
| 401 class IfDirective(Directive): | |
| 31 | 402 """Implementation of the `py:if` template directive for conditionally |
| 403 excluding elements from being output. | |
| 1 | 404 |
| 61 | 405 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
| 1 | 406 ... <b py:if="foo">${bar}</b> |
| 407 ... </div>''') | |
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408 >>> print tmpl.generate(foo=True, bar='Hello') |
| 1 | 409 <div> |
| 410 <b>Hello</b> | |
| 411 </div> | |
| 412 """ | |
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413 __slots__ = [] |
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414 |
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415 ATTRIBUTE = 'test' |
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416 |
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417 def __call__(self, stream, ctxt, directives): |
| 1 | 418 if self.expr.evaluate(ctxt): |
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419 return _apply_directives(stream, ctxt, directives) |
| 1 | 420 return [] |
| 421 | |
| 422 | |
| 423 class MatchDirective(Directive): | |
| 424 """Implementation of the `py:match` template directive. | |
|
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425 |
| 61 | 426 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
|
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427 ... <span py:match="greeting"> |
| 1 | 428 ... Hello ${select('@name')} |
| 429 ... </span> | |
| 430 ... <greeting name="Dude" /> | |
| 431 ... </div>''') | |
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432 >>> print tmpl.generate() |
| 1 | 433 <div> |
| 434 <span> | |
| 435 Hello Dude | |
| 436 </span> | |
| 437 </div> | |
| 438 """ | |
| 439 __slots__ = ['path', 'stream'] | |
| 440 | |
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441 ATTRIBUTE = 'path' |
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442 |
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443 def __init__(self, value, filename=None, lineno=-1, offset=-1): |
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444 Directive.__init__(self, None, filename, lineno, offset) |
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445 self.path = Path(value, filename, lineno) |
| 1 | 446 self.stream = [] |
| 447 | |
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448 def __call__(self, stream, ctxt, directives): |
| 1 | 449 self.stream = list(stream) |
|
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450 ctxt._match_templates.append((self.path.test(ignore_context=True), |
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451 self.path, self.stream, directives)) |
| 1 | 452 return [] |
| 453 | |
| 454 def __repr__(self): | |
|
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455 return '<%s "%s">' % (self.__class__.__name__, self.path.source) |
| 1 | 456 |
| 457 | |
| 458 class ReplaceDirective(Directive): | |
| 459 """Implementation of the `py:replace` template directive. | |
| 460 | |
| 31 | 461 This directive replaces the element with the result of evaluating the |
| 462 value of the `py:replace` attribute: | |
| 463 | |
| 61 | 464 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
| 1 | 465 ... <span py:replace="bar">Hello</span> |
| 466 ... </div>''') | |
|
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467 >>> print tmpl.generate(bar='Bye') |
| 1 | 468 <div> |
| 469 Bye | |
| 470 </div> | |
| 471 | |
| 472 This directive is equivalent to `py:content` combined with `py:strip`, | |
| 473 providing a less verbose way to achieve the same effect: | |
| 474 | |
| 61 | 475 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
| 1 | 476 ... <span py:content="bar" py:strip="">Hello</span> |
| 477 ... </div>''') | |
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478 >>> print tmpl.generate(bar='Bye') |
| 1 | 479 <div> |
| 480 Bye | |
| 481 </div> | |
| 482 """ | |
|
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483 __slots__ = [] |
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484 |
| 54 | 485 def __call__(self, stream, ctxt, directives): |
| 1 | 486 kind, data, pos = stream.next() |
| 69 | 487 yield EXPR, self.expr, pos |
| 1 | 488 |
| 489 | |
| 490 class StripDirective(Directive): | |
| 491 """Implementation of the `py:strip` template directive. | |
| 492 | |
| 493 When the value of the `py:strip` attribute evaluates to `True`, the element | |
| 494 is stripped from the output | |
| 495 | |
| 61 | 496 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
| 1 | 497 ... <div py:strip="True"><b>foo</b></div> |
| 498 ... </div>''') | |
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499 >>> print tmpl.generate() |
| 1 | 500 <div> |
| 501 <b>foo</b> | |
| 502 </div> | |
| 503 | |
|
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504 Leaving the attribute value empty is equivalent to a truth value. |
| 1 | 505 |
| 506 This directive is particulary interesting for named template functions or | |
| 507 match templates that do not generate a top-level element: | |
| 508 | |
| 61 | 509 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
| 1 | 510 ... <div py:def="echo(what)" py:strip=""> |
| 511 ... <b>${what}</b> | |
| 512 ... </div> | |
| 513 ... ${echo('foo')} | |
| 514 ... </div>''') | |
|
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515 >>> print tmpl.generate() |
| 1 | 516 <div> |
| 517 <b>foo</b> | |
| 518 </div> | |
| 519 """ | |
|
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520 __slots__ = [] |
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521 |
| 54 | 522 def __call__(self, stream, ctxt, directives): |
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523 def _generate(): |
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524 if self.expr: |
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525 strip = self.expr.evaluate(ctxt) |
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526 else: |
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527 strip = True |
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528 if strip: |
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529 stream.next() # skip start tag |
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530 previous = stream.next() |
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531 for event in stream: |
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532 yield previous |
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533 previous = event |
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534 else: |
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535 for event in stream: |
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536 yield event |
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537 |
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538 return _apply_directives(_generate(), ctxt, directives) |
| 1 | 539 |
| 540 | |
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541 class ChooseDirective(Directive): |
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542 """Implementation of the `py:choose` directive for conditionally selecting |
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543 one of several body elements to display. |
|
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544 |
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545 If the `py:choose` expression is empty the expressions of nested `py:when` |
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546 directives are tested for truth. The first true `py:when` body is output. |
|
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547 If no `py:when` directive is matched then the fallback directive |
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548 `py:otherwise` will be used. |
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549 |
| 61 | 550 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/" |
|
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551 ... py:choose=""> |
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552 ... <span py:when="0 == 1">0</span> |
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553 ... <span py:when="1 == 1">1</span> |
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554 ... <span py:otherwise="">2</span> |
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555 ... </div>''') |
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556 >>> print tmpl.generate() |
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557 <div> |
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558 <span>1</span> |
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559 </div> |
|
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560 |
|
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561 If the `py:choose` directive contains an expression, the nested `py:when` |
|
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562 directives are tested for equality to the `py:choose` expression: |
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563 |
| 61 | 564 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/" |
|
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565 ... py:choose="2"> |
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566 ... <span py:when="1">1</span> |
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567 ... <span py:when="2">2</span> |
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568 ... </div>''') |
|
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569 >>> print tmpl.generate() |
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570 <div> |
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571 <span>2</span> |
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572 </div> |
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573 |
|
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574 Behavior is undefined if a `py:choose` block contains content outside a |
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575 `py:when` or `py:otherwise` block. Behavior is also undefined if a |
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576 `py:otherwise` occurs before `py:when` blocks. |
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577 """ |
|
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578 __slots__ = ['matched', 'value'] |
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579 |
|
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580 ATTRIBUTE = 'test' |
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581 |
|
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582 def __call__(self, stream, ctxt, directives): |
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583 if self.expr: |
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584 self.value = self.expr.evaluate(ctxt) |
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585 self.matched = False |
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586 ctxt.push(dict(_choose=self)) |
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587 for event in _apply_directives(stream, ctxt, directives): |
|
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588 yield event |
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589 ctxt.pop() |
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590 |
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591 |
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592 class WhenDirective(Directive): |
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593 """Implementation of the `py:when` directive for nesting in a parent with |
|
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594 the `py:choose` directive. |
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595 |
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596 See the documentation of `py:choose` for usage. |
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597 """ |
|
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598 |
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599 ATTRIBUTE = 'test' |
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600 |
| 54 | 601 def __call__(self, stream, ctxt, directives): |
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602 choose = ctxt['_choose'] |
|
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603 if not choose: |
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604 raise TemplateSyntaxError('when directives can only be used inside ' |
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605 'a choose directive', *stream.next()[2]) |
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606 if choose.matched: |
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607 return [] |
|
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608 value = self.expr.evaluate(ctxt) |
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609 try: |
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610 if value == choose.value: |
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611 choose.matched = True |
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612 return _apply_directives(stream, ctxt, directives) |
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613 except AttributeError: |
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614 if value: |
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615 choose.matched = True |
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616 return _apply_directives(stream, ctxt, directives) |
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617 return [] |
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618 |
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619 |
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620 class OtherwiseDirective(Directive): |
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621 """Implementation of the `py:otherwise` directive for nesting in a parent |
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622 with the `py:choose` directive. |
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623 |
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624 See the documentation of `py:choose` for usage. |
|
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625 """ |
| 54 | 626 def __call__(self, stream, ctxt, directives): |
|
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627 choose = ctxt['_choose'] |
|
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Better error reporting for errors in directive expressions, and when `py:otherwise`/`py:when` are used outside a `py:choose` directive. Thanks to Christian Boos for the initial patch.
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628 if not choose: |
|
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629 raise TemplateSyntaxError('an otherwise directive can only be used ' |
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630 'inside a choose directive', |
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631 *stream.next()[2]) |
|
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632 if choose.matched: |
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633 return [] |
|
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634 choose.matched = True |
|
78
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635 return _apply_directives(stream, ctxt, directives) |
|
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636 |
|
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637 |
|
104
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638 class WithDirective(Directive): |
|
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639 """Implementation of the `py:with` template directive, which allows |
|
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640 shorthand access to variables and expressions. |
|
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641 |
|
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Added `py:with` directive based on Jonas' patch in #17.
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642 >>> tmpl = Template('''<div xmlns:py="http://markup.edgewall.org/"> |
|
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643 ... <span py:with="y=7; z=x+10">$x $y $z</span> |
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644 ... </div>''') |
|
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645 >>> print tmpl.generate(x=42) |
|
104
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646 <div> |
|
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647 <span>42 7 52</span> |
|
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648 </div> |
|
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649 """ |
|
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650 __slots__ = ['vars'] |
|
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|
651 |
|
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652 ATTRIBUTE = 'vars' |
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653 |
|
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654 def __init__(self, value, filename=None, lineno=-1, offset=-1): |
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655 Directive.__init__(self, None, filename, lineno, offset) |
|
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656 self.vars = [] |
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657 try: |
|
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658 for stmt in value.split(';'): |
|
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659 name, value = stmt.split('=', 1) |
|
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660 self.vars.append((name.strip(), |
|
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661 Expression(value.strip(), filename, lineno))) |
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662 except SyntaxError, err: |
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663 raise TemplateSyntaxError(err, filename, lineno, |
|
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664 offset + (err.offset or 0)) |
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665 |
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666 def __call__(self, stream, ctxt, directives): |
| 120 | 667 ctxt.push(dict([(name, expr.evaluate(ctxt, nocall=True)) |
|
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668 for name, expr in self.vars])) |
|
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669 for event in _apply_directives(stream, ctxt, directives): |
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670 yield event |
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671 ctxt.pop() |
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672 |
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673 def __repr__(self): |
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674 return '<%s "%s">' % (self.__class__.__name__, |
|
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675 '; '.join(['%s = %s' % (name, expr.source) |
|
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676 for name, expr in self.vars])) |
|
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677 |
|
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678 |
| 1 | 679 class Template(object): |
| 680 """Can parse a template and transform it into the corresponding output | |
| 681 based on context data. | |
| 682 """ | |
| 61 | 683 NAMESPACE = Namespace('http://markup.edgewall.org/') |
| 1 | 684 |
|
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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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|
685 EXPR = StreamEventKind('EXPR') # an expression |
|
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Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
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686 SUB = StreamEventKind('SUB') # a "subprogram" |
|
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|
687 |
| 1 | 688 directives = [('def', DefDirective), |
| 689 ('match', MatchDirective), | |
| 120 | 690 ('when', WhenDirective), |
| 691 ('otherwise', OtherwiseDirective), | |
| 1 | 692 ('for', ForDirective), |
| 693 ('if', IfDirective), | |
|
53
60f1a556690e
* Add helper function to let directives apply any remaining directives, and use that helper consistently in every directive.
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694 ('choose', ChooseDirective), |
|
104
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Added `py:with` directive based on Jonas' patch in #17.
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695 ('with', WithDirective), |
| 1 | 696 ('replace', ReplaceDirective), |
| 697 ('content', ContentDirective), | |
| 698 ('attrs', AttrsDirective), | |
|
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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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699 ('strip', StripDirective)] |
| 1 | 700 _dir_by_name = dict(directives) |
| 701 _dir_order = [directive[1] for directive in directives] | |
| 702 | |
|
21
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|
703 def __init__(self, source, basedir=None, filename=None): |
| 1 | 704 """Initialize a template from either a string or a file-like object.""" |
| 705 if isinstance(source, basestring): | |
| 706 self.source = StringIO(source) | |
| 707 else: | |
| 708 self.source = source | |
|
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|
709 self.basedir = basedir |
| 1 | 710 self.filename = filename or '<string>' |
|
21
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711 if basedir and filename: |
|
eca77129518a
* Include paths are now interpreted relative to the path of the including template. Closes #3.
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712 self.filepath = os.path.join(basedir, filename) |
|
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713 else: |
|
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|
714 self.filepath = '<string>' |
| 1 | 715 |
|
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Separate match and eval filters from the include and user-supplied filters.
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diff
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|
716 self.filters = [] |
| 1 | 717 self.parse() |
| 718 | |
| 719 def __repr__(self): | |
|
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eca77129518a
* Include paths are now interpreted relative to the path of the including template. Closes #3.
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720 return '<%s "%s">' % (self.__class__.__name__, self.filename) |
| 1 | 721 |
| 722 def parse(self): | |
| 723 """Parse the template. | |
| 724 | |
| 725 The parsing stage parses the XML template and constructs a list of | |
| 726 directives that will be executed in the render stage. The input is | |
| 727 split up into literal output (markup that does not depend on the | |
| 728 context data) and actual directives (commands or variable | |
| 729 substitution). | |
| 730 """ | |
| 731 stream = [] # list of events of the "compiled" template | |
| 732 dirmap = {} # temporary mapping of directives to elements | |
| 733 ns_prefix = {} | |
| 734 depth = 0 | |
| 735 | |
|
21
eca77129518a
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736 for kind, data, pos in XMLParser(self.source, filename=self.filename): |
| 1 | 737 |
| 69 | 738 if kind is START_NS: |
| 1 | 739 # Strip out the namespace declaration for template directives |
| 740 prefix, uri = data | |
| 741 if uri == self.NAMESPACE: | |
| 742 ns_prefix[prefix] = uri | |
| 743 else: | |
| 744 stream.append((kind, data, pos)) | |
| 745 | |
| 69 | 746 elif kind is END_NS: |
| 1 | 747 if data in ns_prefix: |
| 748 del ns_prefix[data] | |
| 749 else: | |
| 750 stream.append((kind, data, pos)) | |
| 751 | |
| 69 | 752 elif kind is START: |
| 1 | 753 # Record any directive attributes in start tags |
| 754 tag, attrib = data | |
| 755 directives = [] | |
|
65
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756 strip = False |
|
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757 |
|
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758 if tag in self.NAMESPACE: |
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759 cls = self._dir_by_name.get(tag.localname) |
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760 if cls is None: |
|
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761 raise BadDirectiveError(tag, pos[0], pos[1]) |
|
66
822089ae65ce
Switch copyright to Edgewall and URLs to markup.edgewall.org.
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diff
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762 value = attrib.get(getattr(cls, 'ATTRIBUTE', None), '') |
|
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|
763 directives.append(cls(value, *pos)) |
|
65
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764 strip = True |
|
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diff
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765 |
| 1 | 766 new_attrib = [] |
| 767 for name, value in attrib: | |
|
18
4cbebb15a834
Actually make use of the `markup.core.Namespace` class, and add a couple of doctests.
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diff
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|
768 if name in self.NAMESPACE: |
| 1 | 769 cls = self._dir_by_name.get(name.localname) |
| 770 if cls is None: | |
|
65
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771 raise BadDirectiveError(name, pos[0], pos[1]) |
|
81
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|
772 directives.append(cls(value, *pos)) |
| 1 | 773 else: |
|
75
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774 if value: |
|
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Empty attributes in templates were being stripped out. Thanks to Jonas for the patch.
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775 value = list(self._interpolate(value, *pos)) |
|
81
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|
776 if len(value) == 1 and value[0][0] is TEXT: |
|
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777 value = value[0][1] |
|
75
c3c26300a46d
Empty attributes in templates were being stripped out. Thanks to Jonas for the patch.
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778 else: |
|
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779 value = [(TEXT, u'', pos)] |
| 1 | 780 new_attrib.append((name, value)) |
|
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781 |
| 1 | 782 if directives: |
|
50
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783 directives.sort(lambda a, b: cmp(self._dir_order.index(a.__class__), |
|
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784 self._dir_order.index(b.__class__))) |
|
65
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785 dirmap[(depth, tag)] = (directives, len(stream), strip) |
| 1 | 786 |
| 787 stream.append((kind, (tag, Attributes(new_attrib)), pos)) | |
| 788 depth += 1 | |
| 789 | |
| 69 | 790 elif kind is END: |
| 1 | 791 depth -= 1 |
| 792 stream.append((kind, data, pos)) | |
| 793 | |
| 794 # If there have have directive attributes with the corresponding | |
| 795 # start tag, move the events inbetween into a "subprogram" | |
| 796 if (depth, data) in dirmap: | |
|
65
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797 directives, start_offset, strip = dirmap.pop((depth, data)) |
| 1 | 798 substream = stream[start_offset:] |
|
65
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diff
changeset
|
799 if strip: |
|
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|
800 substream = substream[1:-1] |
| 69 | 801 stream[start_offset:] = [(SUB, (directives, substream), |
| 802 pos)] | |
| 1 | 803 |
| 69 | 804 elif kind is TEXT: |
| 1 | 805 for kind, data, pos in self._interpolate(data, *pos): |
| 806 stream.append((kind, data, pos)) | |
| 807 | |
|
89
d4c7617900e3
Support comments in templates that are not included in the output, in the same way Kid does: if the comment text starts with a `!` character, it is stripped from the output.
cmlenz
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diff
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808 elif kind is COMMENT: |
|
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Support comments in templates that are not included in the output, in the same way Kid does: if the comment text starts with a `!` character, it is stripped from the output.
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|
809 if not data.lstrip().startswith('!'): |
|
d4c7617900e3
Support comments in templates that are not included in the output, in the same way Kid does: if the comment text starts with a `!` character, it is stripped from the output.
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810 stream.append((kind, data, pos)) |
|
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Support comments in templates that are not included in the output, in the same way Kid does: if the comment text starts with a `!` character, it is stripped from the output.
cmlenz
parents:
87
diff
changeset
|
811 |
| 1 | 812 else: |
| 813 stream.append((kind, data, pos)) | |
| 814 | |
| 815 self.stream = stream | |
| 816 | |
| 817 _FULL_EXPR_RE = re.compile(r'(?<!\$)\$\{(.+?)\}') | |
| 818 _SHORT_EXPR_RE = re.compile(r'(?<!\$)\$([a-zA-Z][a-zA-Z0-9_\.]*)') | |
| 819 | |
|
21
eca77129518a
* Include paths are now interpreted relative to the path of the including template. Closes #3.
cmlenz
parents:
18
diff
changeset
|
820 def _interpolate(cls, text, filename=None, lineno=-1, offset=-1): |
| 1 | 821 """Parse the given string and extract expressions. |
| 822 | |
| 823 This method returns a list containing both literal text and `Expression` | |
| 824 objects. | |
|
14
76b5d4b189e6
The `<py:match>` directive now protects itself against simple infinite recursion (see MatchDirective), while still allowing recursion in general.
cmlenz
parents:
13
diff
changeset
|
825 |
| 1 | 826 @param text: the text to parse |
| 827 @param lineno: the line number at which the text was found (optional) | |
| 828 @param offset: the column number at which the text starts in the source | |
| 829 (optional) | |
| 830 """ | |
|
134
df44110ca91d
* Improve the accuracy of line numbers for text nodes, so that reported errors about syntax or evaluation errors in expressions point to the right line (not quite perfect yet, though).
cmlenz
parents:
133
diff
changeset
|
831 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).
cmlenz
parents:
133
diff
changeset
|
832 offset=offset): |
| 1 | 833 for idx, group in enumerate(patterns.pop(0).split(text)): |
| 834 if idx % 2: | |
|
81
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
835 try: |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
836 yield EXPR, Expression(group, filename, lineno), \ |
|
134
df44110ca91d
* Improve the accuracy of line numbers for text nodes, so that reported errors about syntax or evaluation errors in expressions point to the right line (not quite perfect yet, though).
cmlenz
parents:
133
diff
changeset
|
837 (filename, lineno, offset) |
|
81
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
838 except SyntaxError, err: |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
839 raise TemplateSyntaxError(err, filename, lineno, |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
840 offset + (err.offset or 0)) |
| 1 | 841 elif group: |
| 842 if patterns: | |
|
74
3c271699c398
Fix expression interpolation where both shorthand notation and full notation are used inside a single text node. Thanks Jonas.
cmlenz
parents:
73
diff
changeset
|
843 for result in _interpolate(group, patterns[:]): |
| 1 | 844 yield result |
| 845 else: | |
|
134
df44110ca91d
* Improve the accuracy of line numbers for text nodes, so that reported errors about syntax or evaluation errors in expressions point to the right line (not quite perfect yet, though).
cmlenz
parents:
133
diff
changeset
|
846 yield TEXT, group.replace('$$', '$'), \ |
|
df44110ca91d
* Improve the accuracy of line numbers for text nodes, so that reported errors about syntax or evaluation errors in expressions point to the right line (not quite perfect yet, though).
cmlenz
parents:
133
diff
changeset
|
847 (filename, lineno, offset) |
|
df44110ca91d
* Improve the accuracy of line numbers for text nodes, so that reported errors about syntax or evaluation errors in expressions point to the right line (not quite perfect yet, though).
cmlenz
parents:
133
diff
changeset
|
848 if '\n' in group: |
|
df44110ca91d
* Improve the accuracy of line numbers for text nodes, so that reported errors about syntax or evaluation errors in expressions point to the right line (not quite perfect yet, though).
cmlenz
parents:
133
diff
changeset
|
849 lines = group.splitlines() |
|
df44110ca91d
* Improve the accuracy of line numbers for text nodes, so that reported errors about syntax or evaluation errors in expressions point to the right line (not quite perfect yet, though).
cmlenz
parents:
133
diff
changeset
|
850 lineno += len(lines) - 1 |
|
df44110ca91d
* Improve the accuracy of line numbers for text nodes, so that reported errors about syntax or evaluation errors in expressions point to the right line (not quite perfect yet, though).
cmlenz
parents:
133
diff
changeset
|
851 offset += len(lines[-1]) |
|
df44110ca91d
* Improve the accuracy of line numbers for text nodes, so that reported errors about syntax or evaluation errors in expressions point to the right line (not quite perfect yet, though).
cmlenz
parents:
133
diff
changeset
|
852 else: |
|
df44110ca91d
* Improve the accuracy of line numbers for text nodes, so that reported errors about syntax or evaluation errors in expressions point to the right line (not quite perfect yet, though).
cmlenz
parents:
133
diff
changeset
|
853 offset += len(group) |
|
74
3c271699c398
Fix expression interpolation where both shorthand notation and full notation are used inside a single text node. Thanks Jonas.
cmlenz
parents:
73
diff
changeset
|
854 return _interpolate(text, [cls._FULL_EXPR_RE, cls._SHORT_EXPR_RE]) |
| 1 | 855 _interpolate = classmethod(_interpolate) |
| 856 | |
|
149
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
cmlenz
parents:
145
diff
changeset
|
857 def generate(self, *args, **kwargs): |
|
29
4b6cee37ce62
* Minor simplification of template directives: they no longer get passed the template instance and the position, as no directive was actually using
cmlenz
parents:
27
diff
changeset
|
858 """Apply the template to the given context data. |
|
4b6cee37ce62
* Minor simplification of template directives: they no longer get passed the template instance and the position, as no directive was actually using
cmlenz
parents:
27
diff
changeset
|
859 |
|
149
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
cmlenz
parents:
145
diff
changeset
|
860 Any keyword arguments are made available to the template as context |
|
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
cmlenz
parents:
145
diff
changeset
|
861 data. |
|
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
cmlenz
parents:
145
diff
changeset
|
862 |
|
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
cmlenz
parents:
145
diff
changeset
|
863 Only one positional argument is accepted: if it is provided, it must be |
|
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
cmlenz
parents:
145
diff
changeset
|
864 an instance of the `Context` class, and keyword arguments are ignored. |
|
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
cmlenz
parents:
145
diff
changeset
|
865 This calling style is used for internal processing. |
|
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
cmlenz
parents:
145
diff
changeset
|
866 |
|
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
|
867 @return: a markup event stream representing the result of applying |
|
4b6cee37ce62
* Minor simplification of template directives: they no longer get passed the template instance and the position, as no directive was actually using
cmlenz
parents:
27
diff
changeset
|
868 the template to the context data. |
|
4b6cee37ce62
* Minor simplification of template directives: they no longer get passed the template instance and the position, as no directive was actually using
cmlenz
parents:
27
diff
changeset
|
869 """ |
|
149
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
cmlenz
parents:
145
diff
changeset
|
870 if args: |
|
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
cmlenz
parents:
145
diff
changeset
|
871 assert len(args) == 1 |
|
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
cmlenz
parents:
145
diff
changeset
|
872 ctxt = args[0] |
|
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
cmlenz
parents:
145
diff
changeset
|
873 assert isinstance(ctxt, Context) |
|
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
cmlenz
parents:
145
diff
changeset
|
874 else: |
|
7306bf730ff3
`Template.generate()` now accepts the context data as keyword arguments, so that you don't have to import the `Context` class every time you want to pass data into a template.
cmlenz
parents:
145
diff
changeset
|
875 ctxt = Context(**kwargs) |
|
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
876 |
| 69 | 877 stream = self.stream |
| 878 for filter_ in [self._eval, self._match, self._flatten] + self.filters: | |
|
35
3bc4778787c5
Simplify template processing model by removing dynamically generated `SUB` events.
cmlenz
parents:
31
diff
changeset
|
879 stream = filter_(iter(stream), ctxt) |
|
3bc4778787c5
Simplify template processing model by removing dynamically generated `SUB` events.
cmlenz
parents:
31
diff
changeset
|
880 return Stream(stream) |
|
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
881 |
|
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
|
882 def _eval(self, stream, ctxt=None): |
|
29
4b6cee37ce62
* Minor simplification of template directives: they no longer get passed the template instance and the position, as no directive was actually using
cmlenz
parents:
27
diff
changeset
|
883 """Internal stream filter that evaluates any expressions in `START` and |
|
4b6cee37ce62
* Minor simplification of template directives: they no longer get passed the template instance and the position, as no directive was actually using
cmlenz
parents:
27
diff
changeset
|
884 `TEXT` events. |
|
4b6cee37ce62
* Minor simplification of template directives: they no longer get passed the template instance and the position, as no directive was actually using
cmlenz
parents:
27
diff
changeset
|
885 """ |
|
111
8a4d9064f363
Some fixes and more unit tests for the XPath engine.
cmlenz
parents:
104
diff
changeset
|
886 filters = (self._eval, self._match) |
|
81
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
887 |
|
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
|
888 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
|
889 |
|
81
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
890 if kind is START and data[1]: |
|
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
891 # 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
|
892 # 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
|
893 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
|
894 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
|
895 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
|
896 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
|
897 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
|
898 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
|
899 values = [] |
|
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
900 for subkind, subdata, subpos in substream: |
| 69 | 901 if subkind is EXPR: |
|
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
902 values.append(subdata.evaluate(ctxt)) |
|
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
903 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
|
904 values.append(subdata) |
|
48
06c642ba2b08
convert the result of expressions in attributes to strings so that values like ints are output correctly
mgood
parents:
44
diff
changeset
|
905 value = [unicode(x) for x in values if x is not None] |
|
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
906 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
|
907 continue |
|
23
00835401c8cc
Separate match and eval filters from the include and user-supplied filters.
cmlenz
parents:
22
diff
changeset
|
908 new_attrib.append((name, u''.join(value))) |
|
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
909 yield kind, (tag, Attributes(new_attrib)), pos |
|
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
910 |
| 69 | 911 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
|
912 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
|
913 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
|
914 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
|
915 |
|
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
|
916 # 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
|
917 # 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
|
918 # 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
|
919 if isinstance(result, basestring): |
| 69 | 920 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
|
921 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
|
922 # 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
|
923 # 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
|
924 try: |
|
111
8a4d9064f363
Some fixes and more unit tests for the XPath engine.
cmlenz
parents:
104
diff
changeset
|
925 substream = _ensure(result) |
|
81
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
926 for filter_ in filters: |
|
77
f1aa49c759b2
* Simplify implementation of the individual XPath tests (use closures instead of callable classes)
cmlenz
parents:
75
diff
changeset
|
927 substream = filter_(substream, ctxt) |
|
f1aa49c759b2
* Simplify implementation of the individual XPath tests (use closures instead of callable classes)
cmlenz
parents:
75
diff
changeset
|
928 for event in substream: |
|
35
3bc4778787c5
Simplify template processing model by removing dynamically generated `SUB` events.
cmlenz
parents:
31
diff
changeset
|
929 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
|
930 except TypeError: |
|
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
931 # Neither a string nor an iterable, so just pass it |
|
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
932 # through |
| 69 | 933 yield TEXT, unicode(result), pos |
|
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
934 |
|
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 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
|
936 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
|
937 |
|
23
00835401c8cc
Separate match and eval filters from the include and user-supplied filters.
cmlenz
parents:
22
diff
changeset
|
938 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
|
939 """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
|
940 for kind, data, pos in stream: |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
941 if kind is SUB: |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
942 # 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
|
943 # events to which those directives should be applied |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
944 directives, substream = data |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
945 substream = _apply_directives(substream, ctxt, directives) |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
946 for filter_ in (self._eval, self._match, self._flatten): |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
947 substream = filter_(substream, ctxt) |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
948 for event in substream: |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
949 yield event |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
950 else: |
|
cc034182061e
Template expressions are now compiled to Python bytecode.
cmlenz
parents:
80
diff
changeset
|
951 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
|
952 |
|
36
57d607f25484
Fix for #7: match templates no longer process their own output.
cmlenz
parents:
35
diff
changeset
|
953 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
|
954 """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
|
955 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
|
956 """ |
|
36
57d607f25484
Fix for #7: match templates no longer process their own output.
cmlenz
parents:
35
diff
changeset
|
957 if match_templates is None: |
|
57d607f25484
Fix for #7: match templates no longer process their own output.
cmlenz
parents:
35
diff
changeset
|
958 match_templates = ctxt._match_templates |
|
57d607f25484
Fix for #7: match templates no longer process their own output.
cmlenz
parents:
35
diff
changeset
|
959 |
|
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
|
960 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
|
961 |
|
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 # 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
|
963 # 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
|
964 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
|
965 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
|
966 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
|
967 |
|
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
|
968 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
|
969 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
|
970 |
| 116 | 971 if test(kind, data, pos) is True: |
|
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
972 # 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
|
973 # 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
|
974 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
|
975 depth = 1 |
|
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
976 while depth > 0: |
| 73 | 977 kind, data, pos = stream.next() |
| 978 if kind is START: | |
| 979 depth += 1 | |
| 980 elif kind is END: | |
| 981 depth -= 1 | |
| 982 content.append((kind, data, pos)) | |
| 983 test(kind, data, pos) | |
|
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
984 |
|
23
00835401c8cc
Separate match and eval filters from the include and user-supplied filters.
cmlenz
parents:
22
diff
changeset
|
985 content = list(self._flatten(content, ctxt)) |
|
95
7d6426183a90
Improve performance of push/pop operations on the context.
cmlenz
parents:
93
diff
changeset
|
986 select = lambda path: Stream(content).select(path) |
|
7d6426183a90
Improve performance of push/pop operations on the context.
cmlenz
parents:
93
diff
changeset
|
987 ctxt.push(dict(select=select)) |
|
36
57d607f25484
Fix for #7: match templates no longer process their own output.
cmlenz
parents:
35
diff
changeset
|
988 |
|
78
fa4bafcbe4c7
Minor improvements to how directives are applied in template processing.
cmlenz
parents:
77
diff
changeset
|
989 template = _apply_directives(template, ctxt, directives) |
| 69 | 990 for event in self._match(self._eval(template, ctxt), |
| 991 ctxt, match_templates[:idx] + | |
| 992 match_templates[idx + 1:]): | |
|
35
3bc4778787c5
Simplify template processing model by removing dynamically generated `SUB` events.
cmlenz
parents:
31
diff
changeset
|
993 yield event |
| 116 | 994 |
|
35
3bc4778787c5
Simplify template processing model by removing dynamically generated `SUB` events.
cmlenz
parents:
31
diff
changeset
|
995 ctxt.pop() |
|
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
996 break |
| 69 | 997 |
| 998 else: # no matches | |
|
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
|
999 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
|
1000 |
| 1 | 1001 |
| 69 | 1002 EXPR = Template.EXPR |
| 1003 SUB = Template.SUB | |
| 1004 | |
| 1005 | |
| 1 | 1006 class TemplateLoader(object): |
| 1007 """Responsible for loading templates from files on the specified search | |
| 1008 path. | |
| 1009 | |
| 1010 >>> import tempfile | |
| 1011 >>> fd, path = tempfile.mkstemp(suffix='.html', prefix='template') | |
| 1012 >>> os.write(fd, '<p>$var</p>') | |
| 1013 11 | |
| 1014 >>> os.close(fd) | |
| 1015 | |
| 1016 The template loader accepts a list of directory paths that are then used | |
| 1017 when searching for template files, in the given order: | |
| 1018 | |
| 1019 >>> loader = TemplateLoader([os.path.dirname(path)]) | |
| 1020 | |
| 1021 The `load()` method first checks the template cache whether the requested | |
| 1022 template has already been loaded. If not, it attempts to locate the | |
| 1023 template file, and returns the corresponding `Template` object: | |
| 1024 | |
| 1025 >>> template = loader.load(os.path.basename(path)) | |
| 1026 >>> isinstance(template, Template) | |
| 1027 True | |
| 1028 | |
| 1029 Template instances are cached: requesting a template with the same name | |
| 1030 results in the same instance being returned: | |
| 1031 | |
| 1032 >>> loader.load(os.path.basename(path)) is template | |
| 1033 True | |
|
152
064ba1078f92
Add some tests for relative template includes (see #27).
cmlenz
parents:
150
diff
changeset
|
1034 |
|
064ba1078f92
Add some tests for relative template includes (see #27).
cmlenz
parents:
150
diff
changeset
|
1035 >>> os.remove(path) |
| 1 | 1036 """ |
| 1037 def __init__(self, search_path=None, auto_reload=False): | |
| 1038 """Create the template laoder. | |
| 1039 | |
| 1040 @param search_path: a list of absolute path names that should be | |
| 1041 searched for template files | |
| 1042 @param auto_reload: whether to check the last modification time of | |
| 1043 template files, and reload them if they have changed | |
| 1044 """ | |
| 1045 self.search_path = search_path | |
| 1046 if self.search_path is None: | |
| 1047 self.search_path = [] | |
| 1048 self.auto_reload = auto_reload | |
| 1049 self._cache = {} | |
| 1050 self._mtime = {} | |
| 1051 | |
|
21
eca77129518a
* Include paths are now interpreted relative to the path of the including template. Closes #3.
cmlenz
parents:
18
diff
changeset
|
1052 def load(self, filename, relative_to=None): |
| 1 | 1053 """Load the template with the given name. |
| 1054 | |
|
22
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1055 If the `filename` parameter is relative, this method searches the search |
|
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1056 path trying to locate a template matching the given name. If the file |
|
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1057 name is an absolute path, the search path is not bypassed. |
| 1 | 1058 |
|
22
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1059 If requested template is not found, a `TemplateNotFound` exception is |
|
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1060 raised. Otherwise, a `Template` object is returned that represents the |
|
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1061 parsed template. |
|
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1062 |
|
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1063 Template instances are cached to avoid having to parse the same |
|
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1064 template file more than once. Thus, subsequent calls of this method |
|
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1065 with the same template file name will return the same `Template` |
|
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1066 object (unless the `auto_reload` option is enabled and the file was |
|
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1067 changed since the last parse.) |
| 1 | 1068 |
|
21
eca77129518a
* Include paths are now interpreted relative to the path of the including template. Closes #3.
cmlenz
parents:
18
diff
changeset
|
1069 If the `relative_to` parameter is provided, the `filename` is |
|
eca77129518a
* Include paths are now interpreted relative to the path of the including template. Closes #3.
cmlenz
parents:
18
diff
changeset
|
1070 interpreted as being relative to that path. |
|
eca77129518a
* Include paths are now interpreted relative to the path of the including template. Closes #3.
cmlenz
parents:
18
diff
changeset
|
1071 |
| 1 | 1072 @param filename: the relative path of the template file to load |
|
21
eca77129518a
* Include paths are now interpreted relative to the path of the including template. Closes #3.
cmlenz
parents:
18
diff
changeset
|
1073 @param relative_to: the filename of the template from which the new |
|
eca77129518a
* Include paths are now interpreted relative to the path of the including template. Closes #3.
cmlenz
parents:
18
diff
changeset
|
1074 template is being loaded, or `None` if the template is being loaded |
|
eca77129518a
* Include paths are now interpreted relative to the path of the including template. Closes #3.
cmlenz
parents:
18
diff
changeset
|
1075 directly |
| 1 | 1076 """ |
| 69 | 1077 from markup.filters import IncludeFilter |
| 1078 | |
|
21
eca77129518a
* Include paths are now interpreted relative to the path of the including template. Closes #3.
cmlenz
parents:
18
diff
changeset
|
1079 if relative_to: |
| 153 | 1080 filename = os.path.join(os.path.dirname(relative_to), filename) |
| 1 | 1081 filename = os.path.normpath(filename) |
|
22
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1082 |
|
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1083 # First check the cache to avoid reparsing the same file |
| 1 | 1084 try: |
| 1085 tmpl = self._cache[filename] | |
| 1086 if not self.auto_reload or \ | |
|
21
eca77129518a
* Include paths are now interpreted relative to the path of the including template. Closes #3.
cmlenz
parents:
18
diff
changeset
|
1087 os.path.getmtime(tmpl.filepath) == self._mtime[filename]: |
| 1 | 1088 return tmpl |
| 1089 except KeyError: | |
| 1090 pass | |
|
22
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1091 |
|
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1092 # Bypass the search path if the filename is absolute |
|
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1093 search_path = self.search_path |
|
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1094 if os.path.isabs(filename): |
|
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1095 search_path = [os.path.dirname(filename)] |
|
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1096 |
|
31b13ddf9f53
Fix for the template engine plugin: the search path is now ignored if the requested template path is absolute.
cmlenz
parents:
21
diff
changeset
|
1097 for dirname in search_path: |
| 1 | 1098 filepath = os.path.join(dirname, filename) |
| 1099 try: | |
|
133
b9a0031d4bbb
Minor cleanup and performance improvement for the builder module.
cmlenz
parents:
120
diff
changeset
|
1100 fileobj = open(filepath, 'U') |
| 1 | 1101 try: |
|
21
eca77129518a
* Include paths are now interpreted relative to the path of the including template. Closes #3.
cmlenz
parents:
18
diff
changeset
|
1102 tmpl = Template(fileobj, basedir=dirname, filename=filename) |
|
17
ad63ad459524
Refactoring to address #6: all match templates are now processed by a single filter, which means that match templates added by included templates are properly applied. A side effect of this refactoring is that `Context` objects may not be reused across multiple template processing runs.
cmlenz
parents:
14
diff
changeset
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1103 tmpl.filters.append(IncludeFilter(self)) |
| 1 | 1104 finally: |
| 1105 fileobj.close() | |
| 1106 self._cache[filename] = tmpl | |
| 1107 self._mtime[filename] = os.path.getmtime(filepath) | |
| 1108 return tmpl | |
| 1109 except IOError: | |
| 1110 continue | |
| 1111 raise TemplateNotFound(filename, self.search_path) |