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annotate doc/upgrade.txt @ 704:422d0607ba85 experimental-match-fastpaths

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further performance improvements to MatchSet functionality - factor out MatchSet's State so that we dont' have to keep copying over the state every time we create a new child MatchSet. Also fixes a bug where we could get duplicate match indexes when a new match is created while evaluating an existing match Also, try to be lazy about creating the first MatchSet so that we don't hurt bigtable performance (i.e. when there are no py:matches in play at all)
author aflett
date Fri, 04 Apr 2008 16:57:27 +0000
parents af57b12e3dd2
children 5420fe9d99a9 d143dd73789b
rev   line source
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1 Upgrading Genshi
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2 ================
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4
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5 .. contents:: Contents
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6 :depth: 2
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7 .. sectnum::
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8
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1da8de3e5e51 Add a new syntax for text templates, which is available alongside the old syntax for now. The new syntax is more poweful and flexible, using Django-style directive notation.
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10 Upgrading from Genshi 0.4.x to 0.5.x
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11 ------------------------------------
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13 Genshi 0.5 introduces a new, alternative syntax for text templates,
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14 which is more flexible and powerful compared to the old syntax. For
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15 backwards compatibility, this new syntax is not used by default,
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16 though it will be in a future version. It is recommended that you
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17 migrate to using this new syntax. To do so, simply rename any
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18 references in your code to ``TextTemplate`` to ``NewTextTemplate``. To
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19 explicitly use the old syntax, use ``OldTextTemplate`` instead, so
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20 that you can be sure you'll be using the same language when the
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21 default in Genshi is changed (at least until the old implementation is
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22 completely removed).
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24 The default error handling mode has been changed to "strict". This
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25 means that accessing variables not defined in the template data will
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26 now generate an immediate exception, as will accessing object
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27 attributes or dictionary keys that don't exist. If your templates rely
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28 on the old lenient behavior, you can configure Genshi to use that
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29 instead. See the documentation for details on how to do that. But be
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30 warned that lenient error handling may be removed completely in a
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31 future release.
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32
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33 There has also been a subtle change to how ``py:match`` templates are
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34 processed: in previous versions, all match templates would be applied
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35 to the content generated by the matching template, and only the
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36 matching template itself was applied recursively to the original
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37 content. This behavior resulted in problems with many kinds of
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38 recursive matching, and hence was changed for 0.5: now, all match
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39 templates declared before the matching template are applied to the
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40 original content, and match templates declared after the matching
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41 template are applied to the generated content. This change should not
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42 have any effect on most applications, but you may want to check your
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43 use of match templates to make sure.
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44
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336
7763f7aec949 Refactoring: `genshi.template` is now a package, it was getting way to crowded in that file.
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46 Upgrading from Genshi 0.3.x to 0.4.x
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47 ------------------------------------
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48
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a89368769b82 Add `filters` package in `setup.py`.
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49 The modules ``genshi.filters`` and ``genshi.template`` have been
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50 refactored into packages containing multiple modules. While code using
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51 the regular APIs should continue to work without problems, you should
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52 make sure to remove any leftover traces of the files ``filters.py``
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53 and ``template.py`` in the ``genshi`` package on the installation
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54 path (including the corresponding ``.pyc`` files). This is not
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55 necessary when Genshi was installed as a Python egg.
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57 Results of evaluating template expressions are no longer implicitly
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58 called if they are callable. If you have been using that feature, you
35189e960252 Remove automatic calling of expression evaluation results if they are callable. See [http://groups.google.com/group/genshi/browse_thread/thread/f515986760918d41 this mailing list thread].
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59 will need to add the parenthesis to actually call the function.
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60
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61 Instances of ``genshi.core.Attrs`` are now immutable. Filters
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62 manipulating the attributes in a stream may need to be updated. Also,
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63 the ``Attrs`` class no longer automatically wraps all attribute names
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64 in ``QName`` objects, so users of the ``Attrs`` class need to do this
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65 themselves. See the documentation of the ``Attrs`` class for more
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66 information.
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69 Upgrading from Markup
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70 ---------------------
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71
88ec2b306296 * Added implementation of a simple text-based template engine. Closes #47.
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72 Prior to version 0.3, the name of the Genshi project was "Markup". The
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73 name change means that you will have to adjust your import statements
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74 and the namespace URI of XML templates, among other things:
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75
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76 * The package name was changed from "markup" to "genshi". Please
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77 adjust any import statements referring to the old package name.
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78 * The namespace URI for directives in Genshi XML templates has changed
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79 from ``http://markup.edgewall.org/`` to
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80 ``http://genshi.edgewall.org/``. Please update the ``xmlns:py``
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81 declaration in your template files accordingly.
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82
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83 Furthermore, due to the inclusion of a text-based template language,
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84 the class::
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85
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86 markup.template.Template
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87
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88 has been renamed to::
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90 genshi.template.MarkupTemplate
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91
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92 If you've been using the Template class directly, you'll need to
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93 update your code (a simple find/replace should do—the API itself
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94 did not change).
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