Mercurial > genshi > genshi-test
comparison markup/plugin.py @ 192:cda3bdfc19ed
Expression evaluation now differentiates between undefined variables and variables that are defined but set to `None`.
| author | cmlenz |
|---|---|
| date | Wed, 23 Aug 2006 17:49:14 +0000 |
| parents | 35e768b0a58b |
| children | 547511535aaa |
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| 191:929ef2913b87 | 192:cda3bdfc19ed |
|---|---|
| 17 """ | 17 """ |
| 18 | 18 |
| 19 from pkg_resources import resource_filename | 19 from pkg_resources import resource_filename |
| 20 | 20 |
| 21 from markup.core import Attrs, Stream, QName | 21 from markup.core import Attrs, Stream, QName |
| 22 from markup.eval import Undefined | |
| 23 from markup.input import HTML, XML | |
| 22 from markup.template import Context, Template, TemplateLoader | 24 from markup.template import Context, Template, TemplateLoader |
| 23 | 25 |
| 24 def et_to_stream(element): | 26 def ET(element): |
| 25 """Converts the given ElementTree element to a markup stream.""" | 27 """Converts the given ElementTree element to a markup stream.""" |
| 26 tag_name = element.tag | 28 tag_name = element.tag |
| 27 if tag_name.startswith('{'): | 29 if tag_name.startswith('{'): |
| 28 tag_name = tag_name[1:] | 30 tag_name = tag_name[1:] |
| 29 tag_name = QName(tag_name) | 31 tag_name = QName(tag_name) |
| 69 def transform(self, info, template): | 71 def transform(self, info, template): |
| 70 """Render the output to an event stream.""" | 72 """Render the output to an event stream.""" |
| 71 if not isinstance(template, Template): | 73 if not isinstance(template, Template): |
| 72 template = self.load_template(template) | 74 template = self.load_template(template) |
| 73 | 75 |
| 74 data = {'ET': et_to_stream} | 76 data = {'ET': ET, 'HTML': HTML, 'XML': XML} |
| 75 if self.get_extra_vars: | 77 if self.get_extra_vars: |
| 76 data.update(self.get_extra_vars()) | 78 data.update(self.get_extra_vars()) |
| 77 data.update(info) | 79 data.update(info) |
| 80 ctxt = Context(**data) | |
| 78 | 81 |
| 79 return template.generate(**data) | 82 # Some functions for Kid compatibility |
| 83 def defined(name): | |
| 84 return ctxt.get(name, Undefined) is not Undefined | |
| 85 ctxt['defined'] = defined | |
| 86 def value_of(name, default=None): | |
| 87 val = ctxt.get(name, Undefined) | |
| 88 if val is not Undefined: | |
| 89 return val | |
| 90 return default | |
| 91 ctxt['value_of'] = value_of | |
| 92 | |
| 93 return template.generate(ctxt) |