z3c.pt An implementation of the TAL template language. Overview -------- The z3c.pt package provides an alternative implementation of the TAL template language including i18n. It also provides a simple text template class that allows expression interpolation. Casual benchmarks pegs it 12x more performant than ``zope.pagetemplate``. In a nutshell: * Templates are bytecode-compiled * Only Python-expressions are supported * Depends only on lxml * Adds support for expression interpolation * Limited support for CSS, Javascript and other non-XML documents See the README.txt inside the package for instructions on usage. Note: The METAL macro language is not supported. Template and expression language -------------------------------- The template and expression language is based loosely on the TAL 1.4 specification*. Some notable changes: 1. Only Python-expressions are allowed. Expressions can have try-except fallbacks using the vertical bar syntax: tal:content="<expression> | <first fallback> | <second fallback> | ..." 2. Tuples are allowed in the tal:define statement: tal:define="(a, b, c) [1, 2, 3]" 3. Generators are allowed in tal:repeat statements. Note that the repeat variable is not available in this case. tal:repeat="i <some generator>" 4. Attribute-access to dictionary entries is allowed, e.g. dictionary.key can be used instead of ``dictionary['key']``. 5. Expressions that return a callable are called. 6. Expression interpolation is allowed: <a href="mailto:${context.email}">${context.email}</a> 7. Attribute-values are always escaped; document expressions are never. .. _TAL: http://wiki.zope.org/ZPT/TALSpecification14 Development ----------- If you want to use the code directly from trunk, provide ``z3c.pt==dev`` as your dependency. http://svn.zope.org/z3c.pt/trunk#egg=z3c.pt-dev Changelog --------- Version 0.7 - March 10, 2008 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - Added support for comments; expressions are allowed inside comments, i.e. <!-- ${'Hello World!'} --> Comments are always included. Version 0.6 - February 24, 2008 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - Added support for text templates; these allow expression interpolation in non-XML documents like CSS stylesheets and javascript files. Version 0.5 - February 23, 2008 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - Expression interpolation implemented. Version 0.4 - February 22, 2008 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - Engine now uses cStringIO yielding a 2.5x performance improvement. Unicode is now handled correctly. Version 0.3 - December 23, 2007 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - Code optimization; bug fixing spree [malthe] - Added ``ViewPageTemplateFile`` class [malthe] - Added support for i18n [malthe] - Engine rewrite; improved code generation abstractions [malthe] Version 0.2 - December 5, 2007 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - Major optimizations to the generated code [malthe] Version 0.1 - December 3, 2007 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - First public release [malthe] Malthe Borch 38d1fa3709e4435d5acabdd3c1d26b529ec24227 0.7