genshi/mirror: doc/templates.txt annotate

annotate doc/templates.txt @ 839:62b7d1a058dd stable-0.5.x

Ported [1046:1047] to 0.5.x branch.

author	cmlenz
date	Tue, 17 Mar 2009 17:20:04 +0000
parents	967236817c6a
children

rev	line source
442 97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	1 .. -- mode: rst; encoding: utf-8 --
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	2
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	3 ========================
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	4 Genshi Templating Basics
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	5 ========================
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	6
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	7 Genshi provides a template engine that can be used for generating either
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	8 markup (such as HTML_ or XML_) or plain text. While both share some of the
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	9 syntax (and much of the underlying implementation) they are essentially
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	10 separate languages.
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	11
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	12 .. _html: http://www.w3.org/html/
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	13 .. _xml: http://www.w3.org/XML/
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	14
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	15 This document describes the common parts of the template engine and will be most
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	16 useful as reference to those developing Genshi templates. Templates are XML or
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	17 plain text files that include processing directives_ that affect how the
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	18 template is rendered, and template expressions_ that are dynamically substituted
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	19 by variable data.
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	20
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	21
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	22 .. contents:: Contents
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	23 :depth: 3
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	24 .. sectnum::
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	25
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	26 --------
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	27 Synopsis
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	28 --------
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	29
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	30 A Genshi markup template is a well-formed XML document with embedded Python
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	31 used for control flow and variable substitution. Markup templates should be
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	32 used to generate any kind of HTML or XML output, as they provide many advantages
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	33 over simple text-based templates (such as automatic escaping of strings).
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	34
510 1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	35 The following illustrates a very basic Genshi markup template:
1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	36
1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	37 .. code-block:: genshi
442 97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	38
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	39 <?python
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	40 title = "A Genshi Template"
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	41 fruits = ["apple", "orange", "kiwi"]
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	42 ?>
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	43 <html xmlns:py="http://genshi.edgewall.org/">
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	44 <head>
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	45 <title py:content="title">This is replaced.</title>
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	46 </head>
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	47
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	48 <body>
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	49 <p>These are some of my favorite fruits:</p>
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	50 <ul>
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	51 <li py:for="fruit in fruits">
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	52 I like ${fruit}s
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	53 </li>
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	54 </ul>
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	55 </body>
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	56 </html>
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	57
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	58 This example shows:
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	59
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	60 (a) a Python code block, using a processing instruction
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	61 (b) the Genshi namespace declaration
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	62 (c) usage of templates directives (``py:content`` and ``py:for``)
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	63 (d) an inline Python expression (``${fruit}``).
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	64
510 1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	65 The template would generate output similar to this:
1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	66
1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	67 .. code-block:: genshi
445 ec7890aa7c0b Add documentation page on the plugin API. cmlenz parents: 442 diff changeset	68
ec7890aa7c0b Add documentation page on the plugin API. cmlenz parents: 442 diff changeset	69 <html>
ec7890aa7c0b Add documentation page on the plugin API. cmlenz parents: 442 diff changeset	70 <head>
ec7890aa7c0b Add documentation page on the plugin API. cmlenz parents: 442 diff changeset	71 <title>A Genshi Template</title>
ec7890aa7c0b Add documentation page on the plugin API. cmlenz parents: 442 diff changeset	72 </head>
ec7890aa7c0b Add documentation page on the plugin API. cmlenz parents: 442 diff changeset	73
ec7890aa7c0b Add documentation page on the plugin API. cmlenz parents: 442 diff changeset	74 <body>
ec7890aa7c0b Add documentation page on the plugin API. cmlenz parents: 442 diff changeset	75 <p>These are some of my favorite fruits:</p>
ec7890aa7c0b Add documentation page on the plugin API. cmlenz parents: 442 diff changeset	76 <ul>
ec7890aa7c0b Add documentation page on the plugin API. cmlenz parents: 442 diff changeset	77 <li>I like apples</li>
ec7890aa7c0b Add documentation page on the plugin API. cmlenz parents: 442 diff changeset	78 <li>I like oranges</li>
ec7890aa7c0b Add documentation page on the plugin API. cmlenz parents: 442 diff changeset	79 <li>I like kiwis</li>
ec7890aa7c0b Add documentation page on the plugin API. cmlenz parents: 442 diff changeset	80 </ul>
ec7890aa7c0b Add documentation page on the plugin API. cmlenz parents: 442 diff changeset	81 </body>
ec7890aa7c0b Add documentation page on the plugin API. cmlenz parents: 442 diff changeset	82 </html>
ec7890aa7c0b Add documentation page on the plugin API. cmlenz parents: 442 diff changeset	83
442 97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	84 A text template is a simple plain text document that can also contain embedded
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	85 Python code. Text templates can be used to generate simple non-markup text
510 1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	86 formats, such as the body of an plain text email. For example:
1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	87
1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	88 .. code-block:: genshitext
442 97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	89
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	90 Dear $name,
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	91
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	92 These are some of my favorite fruits:
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	93 #for fruit in fruits
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	94 * $fruit
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	95 #end
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	96
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	97
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	98 ----------
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	99 Python API
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	100 ----------
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	101
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	102 The Python code required for templating with Genshi is generally based on the
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	103 following pattern:
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	104
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	105 * Attain a ``MarkupTemplate`` or ``TextTemplate`` object from a string or
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	106 file-like object containing the template source. This can either be done
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	107 directly, or through a ``TemplateLoader`` instance.
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	108 * Call the ``generate()`` method of the template, passing any data that should
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	109 be made available to the template as keyword arguments.
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	110 * Serialize the resulting stream using its ``render()`` method.
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	111
510 1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	112 For example:
1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	113
1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	114 .. code-block:: pycon
442 97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	115
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	116 >>> from genshi.template import MarkupTemplate
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	117 >>> tmpl = MarkupTemplate('<h1>Hello, $name!</h1>')
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	118 >>> stream = tmpl.generate(name='world')
592 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. cmlenz parents: 545 diff changeset	119 >>> print stream.render('xhtml')
442 97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	120 <h1>Hello, world!</h1>
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	121
592 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. cmlenz parents: 545 diff changeset	122 .. note:: See the Serialization_ section of the `Markup Streams`_ page for
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. cmlenz parents: 545 diff changeset	123 information on configuring template output options.
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. cmlenz parents: 545 diff changeset	124
510 1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	125 Using a text template is similar:
1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	126
1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	127 .. code-block:: pycon
442 97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	128
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	129 >>> from genshi.template import TextTemplate
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	130 >>> tmpl = TextTemplate('Hello, $name!')
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	131 >>> stream = tmpl.generate(name='world')
605 d0345c64da65 Text templates now default to rendering as plain text; it is no longer necessary to explicitly specify the "text" method to the `render()` or `serialize()` method of the generated markup stream. See tickets #62 and #118. cmlenz parents: 592 diff changeset	132 >>> print stream
442 97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	133 Hello, world!
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	134
592 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. cmlenz parents: 545 diff changeset	135 .. note:: If you want to use text templates, you should consider using the
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. cmlenz parents: 545 diff changeset	136 ``NewTextTemplate`` class instead of simply ``TextTemplate``. See
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. cmlenz parents: 545 diff changeset	137 the `Text Template Language`_ page.
442 97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	138
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	139 .. _serialization: streams.html#serialization
592 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. cmlenz parents: 545 diff changeset	140 .. _`Text Template Language`: text-templates.html
442 97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	141 .. _`Markup Streams`: streams.html
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	142
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	143 Using a template loader provides the advantage that “compiled” templates are
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	144 automatically cached, and only parsed again when the template file changes. In
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	145 addition, it enables the use of a template search path, allowing template
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	146 directories to be spread across different file-system locations. Using a
510 1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	147 template loader would generally look as follows:
1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	148
1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	149 .. code-block:: python
442 97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	150
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	151 from genshi.template import TemplateLoader
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	152 loader = TemplateLoader([templates_dir1, templates_dir2])
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	153 tmpl = loader.load('test.html')
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	154 stream = tmpl.generate(title='Hello, world!')
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	155 print stream.render()
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	156
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	157 See the `API documentation <api/index.html>`_ for details on using Genshi via
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	158 the Python API.
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	159
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	160
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	161 .. _`expressions`:
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	162
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	163 ------------------------------------
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	164 Template Expressions and Code Blocks
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	165 ------------------------------------
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	166
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	167 Python_ expressions can be used in text and directive arguments. An expression
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	168 is substituted with the result of its evaluation against the template data.
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	169 Expressions in text (which includes the values of non-directive attributes) need
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	170 to prefixed with a dollar sign (``$``) and usually enclosed in curly braces
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	171 (``{…}``).
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	172
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	173 .. _python: http://www.python.org/
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	174
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	175 If the expression starts with a letter and contains only letters, digits, dots,
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	176 and underscores, the curly braces may be omitted. In all other cases, the
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	177 braces are required so that the template processor knows where the expression
510 1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	178 ends:
1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	179
1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	180 .. code-block:: pycon
442 97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	181
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	182 >>> from genshi.template import MarkupTemplate
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	183 >>> tmpl = MarkupTemplate('<em>${items[0].capitalize()} item</em>')
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	184 >>> print tmpl.generate(items=['first', 'second'])
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	185 <em>First item</em>
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	186
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	187 Expressions support the full power of Python. In addition, it is possible to
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	188 access items in a dictionary using “dotted notation” (i.e. as if they were
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	189 attributes), and vice-versa (i.e. access attributes as if they were items in a
510 1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	190 dictionary):
1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	191
1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	192 .. code-block:: pycon
442 97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	193
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	194 >>> from genshi.template import MarkupTemplate
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	195 >>> tmpl = MarkupTemplate('<em>${dict.foo}</em>')
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	196 >>> print tmpl.generate(dict={'foo': 'bar'})
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	197 <em>bar</em>
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	198
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	199 Because there are two ways to access either attributes or items, expressions
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	200 do not raise the standard ``AttributeError`` or ``IndexError`` exceptions, but
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	201 rather an exception of the type ``UndefinedError``. The same kind of error is
476 1bb01fce61ba Update documentation to reflect changes in [573]. cmlenz parents: 445 diff changeset	202 raised when you try to use a top-level variable that is not in the context data.
1bb01fce61ba Update documentation to reflect changes in [573]. cmlenz parents: 445 diff changeset	203 See `Error Handling`_ below for details on how such errors are handled.
442 97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	204
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	205
812 967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	206 Escaping
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	207 ========
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	208
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	209 If you need to include a literal dollar sign in the output where Genshi would
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	210 normally detect an expression, you can simply add another dollar sign:
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	211
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	212 .. code-block:: pycon
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	213
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	214 >>> from genshi.template import MarkupTemplate
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	215 >>> tmpl = MarkupTemplate('<em>$foo</em>') # Wanted "$foo" as literal output
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	216 >>> print tmpl.generate()
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	217 Traceback (most recent call last):
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	218 ...
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	219 UndefinedError: "foo" not defined
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	220 >>> tmpl = MarkupTemplate('<em>$$foo</em>')
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	221 >>> print tmpl.generate()
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	222 <em>$foo</em>
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	223
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	224 But note that this is not necessary if the characters following the dollar sign
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	225 do not qualify as an expression. For example, the following needs no escaping:
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	226
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	227 .. code-block:: pycon
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	228
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	229 >>> tmpl = MarkupTemplate('<script>$(function() {})</script>')
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	230 >>> print tmpl.generate()
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	231 <script>$(function() {})</script>
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	232
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	233 On the other hand, Genshi will always replace two dollar signs in text with a
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	234 single dollar sign, so you'll need to use three dollar signs to get two in the
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	235 output:
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	236
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	237 .. code-block:: pycon
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	238
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	239 >>> tmpl = MarkupTemplate('<script>$$$("div")</script>')
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	240 >>> print tmpl.generate()
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	241 <script>$$("div")</script>
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	242
967236817c6a Ported [1013] to 0.5.x branch. cmlenz parents: 692 diff changeset	243
442 97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	244 .. _`code blocks`:
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	245
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	246 Code Blocks
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	247 ===========
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	248
609 6d4877844e28 Add support for Python code blocks in text templates using the new syntax. cmlenz parents: 606 diff changeset	249 Templates also support full Python code blocks, using the ``<?python ?>``
6d4877844e28 Add support for Python code blocks in text templates using the new syntax. cmlenz parents: 606 diff changeset	250 processing instruction in XML templates:
510 1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	251
1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	252 .. code-block:: genshi
442 97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	253
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	254 <div>
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	255 <?python
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	256 from genshi.builder import tag
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	257 def greeting(name):
649 717bbfe5bbdc Fix typo in docs. Closes #153. cmlenz parents: 609 diff changeset	258 return tag.b('Hello, %s!' % name) ?>
442 97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	259 ${greeting('world')}
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	260 </div>
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	261
510 1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	262 This will produce the following output:
1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	263
609 6d4877844e28 Add support for Python code blocks in text templates using the new syntax. cmlenz parents: 606 diff changeset	264 .. code-block:: xml
442 97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	265
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	266 <div>
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	267 <b>Hello, world!</b>
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	268 </div>
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	269
609 6d4877844e28 Add support for Python code blocks in text templates using the new syntax. cmlenz parents: 606 diff changeset	270 In text templates (although only those using the new syntax introduced in
6d4877844e28 Add support for Python code blocks in text templates using the new syntax. cmlenz parents: 606 diff changeset	271 Genshi 0.5), code blocks use the special ``{% python %}`` directive:
6d4877844e28 Add support for Python code blocks in text templates using the new syntax. cmlenz parents: 606 diff changeset	272
6d4877844e28 Add support for Python code blocks in text templates using the new syntax. cmlenz parents: 606 diff changeset	273 .. code-block:: genshitext
6d4877844e28 Add support for Python code blocks in text templates using the new syntax. cmlenz parents: 606 diff changeset	274
6d4877844e28 Add support for Python code blocks in text templates using the new syntax. cmlenz parents: 606 diff changeset	275 {% python
6d4877844e28 Add support for Python code blocks in text templates using the new syntax. cmlenz parents: 606 diff changeset	276 from genshi.builder import tag
6d4877844e28 Add support for Python code blocks in text templates using the new syntax. cmlenz parents: 606 diff changeset	277 def greeting(name):
649 717bbfe5bbdc Fix typo in docs. Closes #153. cmlenz parents: 609 diff changeset	278 return 'Hello, %s!' % name
609 6d4877844e28 Add support for Python code blocks in text templates using the new syntax. cmlenz parents: 606 diff changeset	279 %}
6d4877844e28 Add support for Python code blocks in text templates using the new syntax. cmlenz parents: 606 diff changeset	280 ${greeting('world')}
6d4877844e28 Add support for Python code blocks in text templates using the new syntax. cmlenz parents: 606 diff changeset	281
6d4877844e28 Add support for Python code blocks in text templates using the new syntax. cmlenz parents: 606 diff changeset	282 This will produce the following output::
6d4877844e28 Add support for Python code blocks in text templates using the new syntax. cmlenz parents: 606 diff changeset	283
6d4877844e28 Add support for Python code blocks in text templates using the new syntax. cmlenz parents: 606 diff changeset	284 Hello, world!
6d4877844e28 Add support for Python code blocks in text templates using the new syntax. cmlenz parents: 606 diff changeset	285
6d4877844e28 Add support for Python code blocks in text templates using the new syntax. cmlenz parents: 606 diff changeset	286
442 97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	287 Code blocks can import modules, define classes and functions, and basically do
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	288 anything you can do in normal Python code. What code blocks can not do is to
606 37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	289 produce content that is emitted directly tp the generated output.
442 97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	290
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	291 .. note:: Using the ``print`` statement will print to the standard output
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	292 stream, just as it does for other Python code in your application.
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	293
476 1bb01fce61ba Update documentation to reflect changes in [573]. cmlenz parents: 445 diff changeset	294 Unlike expressions, Python code in ``<?python ?>`` processing instructions can
1bb01fce61ba Update documentation to reflect changes in [573]. cmlenz parents: 445 diff changeset	295 not use item and attribute access in an interchangeable manner. That means that
1bb01fce61ba Update documentation to reflect changes in [573]. cmlenz parents: 445 diff changeset	296 “dotted notation” is always attribute access, and vice-versa.
1bb01fce61ba Update documentation to reflect changes in [573]. cmlenz parents: 445 diff changeset	297
1bb01fce61ba Update documentation to reflect changes in [573]. cmlenz parents: 445 diff changeset	298 The support for Python code blocks in templates is not supposed to encourage
1bb01fce61ba Update documentation to reflect changes in [573]. cmlenz parents: 445 diff changeset	299 mixing application code into templates, which is generally considered bad
1bb01fce61ba Update documentation to reflect changes in [573]. cmlenz parents: 445 diff changeset	300 design. If you're using many code blocks, that may be a sign that you should
1bb01fce61ba Update documentation to reflect changes in [573]. cmlenz parents: 445 diff changeset	301 move such code into separate Python modules.
442 97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	302
545 619340e2d805 Support for Python code blocks in templates can now be disabled. Closes #123. cmlenz parents: 510 diff changeset	303 If you'd rather not allow the use of Python code blocks in templates, you can
619340e2d805 Support for Python code blocks in templates can now be disabled. Closes #123. cmlenz parents: 510 diff changeset	304 simply set the ``allow_exec`` parameter (available on the ``Template`` and the
619340e2d805 Support for Python code blocks in templates can now be disabled. Closes #123. cmlenz parents: 510 diff changeset	305 ``TemplateLoader`` initializers) to ``False``. In that case Genshi will raise
619340e2d805 Support for Python code blocks in templates can now be disabled. Closes #123. cmlenz parents: 510 diff changeset	306 a syntax error when a ``<?python ?>`` processing instruction is encountered.
619340e2d805 Support for Python code blocks in templates can now be disabled. Closes #123. cmlenz parents: 510 diff changeset	307 But please note that disallowing code blocks in templates does not turn Genshi
619340e2d805 Support for Python code blocks in templates can now be disabled. Closes #123. cmlenz parents: 510 diff changeset	308 into a sandboxable template engine; there are sufficient ways to do harm even
619340e2d805 Support for Python code blocks in templates can now be disabled. Closes #123. cmlenz parents: 510 diff changeset	309 using plain expressions.
619340e2d805 Support for Python code blocks in templates can now be disabled. Closes #123. cmlenz parents: 510 diff changeset	310
692 e162edb680cf Add warning about using code blocks on Python 2.3. Closes #181. cmlenz parents: 649 diff changeset	311 .. warning:: Unfortunately, code blocks are severely limited when running
e162edb680cf Add warning about using code blocks on Python 2.3. Closes #181. cmlenz parents: 649 diff changeset	312 under Python 2.3: For example, it is not possible to access
e162edb680cf Add warning about using code blocks on Python 2.3. Closes #181. cmlenz parents: 649 diff changeset	313 variables defined in outer scopes. If you plan to use code blocks
e162edb680cf Add warning about using code blocks on Python 2.3. Closes #181. cmlenz parents: 649 diff changeset	314 extensively, it is strongly recommended that you run Python 2.4
e162edb680cf Add warning about using code blocks on Python 2.3. Closes #181. cmlenz parents: 649 diff changeset	315 or later.
e162edb680cf Add warning about using code blocks on Python 2.3. Closes #181. cmlenz parents: 649 diff changeset	316
442 97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	317
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	318 .. _`error handling`:
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	319
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	320 Error Handling
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	321 ==============
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	322
606 37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	323 By default, Genshi raises an ``UndefinedError`` if a template expression
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	324 attempts to access a variable that is not defined:
510 1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	325
1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	326 .. code-block:: pycon
442 97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	327
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	328 >>> from genshi.template import MarkupTemplate
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	329 >>> tmpl = MarkupTemplate('<p>${doh}</p>')
606 37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	330 >>> tmpl.generate().render('xhtml')
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	331 Traceback (most recent call last):
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	332 ...
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	333 UndefinedError: "doh" not defined
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	334
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	335 You can change this behavior by setting the variable lookup mode to "lenient".
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	336 In that case, accessing undefined variables returns an `Undefined` object,
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	337 meaning that the expression does not fail immediately. See below for details.
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	338
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	339 If you need to check whether a variable exists in the template context, use the
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	340 defined_ or the value_of_ function described below. To check for existence of
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	341 attributes on an object, or keys in a dictionary, use the ``hasattr()``,
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	342 ``getattr()`` or ``get()`` functions, or the ``in`` operator, just as you would
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	343 in regular Python code:
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	344
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	345 >>> from genshi.template import MarkupTemplate
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	346 >>> tmpl = MarkupTemplate('<p>${defined("doh")}</p>')
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	347 >>> print tmpl.generate().render('xhtml')
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	348 <p>False</p>
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	349
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	350 .. note:: Lenient error handling was the default in Genshi prior to version 0.5.
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	351 Strict mode was introduced in version 0.4, and became the default in
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	352 0.5. The reason for this change was that the lenient error handling
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	353 was masking actual errors in templates, thereby also making it harder
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	354 to debug some problems.
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	355
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	356
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	357 .. _`lenient`:
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	358
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	359 Lenient Mode
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	360 ------------
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	361
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	362 If you instruct Genshi to use the lenient variable lookup mode, it allows you
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	363 to access variables that are not defined, without raising an ``UndefinedError``.
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	364
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	365 This mode can be chosen by passing the ``lookup='lenient'`` keyword argument to
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	366 the template initializer, or by passing the ``variable_lookup='lenient'``
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	367 keyword argument to the ``TemplateLoader`` initializer:
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	368
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	369 .. code-block:: pycon
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	370
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	371 >>> from genshi.template import MarkupTemplate
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	372 >>> tmpl = MarkupTemplate('<p>${doh}</p>', lookup='lenient')
442 97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	373 >>> print tmpl.generate().render('xhtml')
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	374 <p></p>
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	375
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	376 You will however get an exception if you try to call an undefined variable, or
510 1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	377 do anything else with it, such as accessing its attributes:
1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	378
1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	379 .. code-block:: pycon
442 97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	380
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	381 >>> from genshi.template import MarkupTemplate
606 37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	382 >>> tmpl = MarkupTemplate('<p>${doh.oops}</p>', lookup='lenient')
442 97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	383 >>> print tmpl.generate().render('xhtml')
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	384 Traceback (most recent call last):
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	385 ...
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	386 UndefinedError: "doh" not defined
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	387
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	388 If you need to know whether a variable is defined, you can check its type
510 1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	389 against the ``Undefined`` class, for example in a conditional directive:
1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	390
1bdccd3bda00 Use syntax highlighting on all the other doc pages, too. cmlenz parents: 476 diff changeset	391 .. code-block:: pycon
442 97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	392
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	393 >>> from genshi.template import MarkupTemplate
606 37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	394 >>> tmpl = MarkupTemplate('<p>${type(doh) is not Undefined}</p>',
37ff75bb4301 Changed the default error handling mode to "strict". cmlenz parents: 605 diff changeset	395 ... lookup='lenient')
442 97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	396 >>> print tmpl.generate().render('xhtml')
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	397 <p>False</p>
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	398
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	399 Alternatively, the built-in functions defined_ or value_of_ can be used in this
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	400 case.
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	401
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	402 Custom Modes
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	403 ------------
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	404
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	405 In addition to the built-in "lenient" and "strict" modes, it is also possible to
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	406 use a custom error handling mode. For example, you could use lenient error
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	407 handling in a production environment, while also logging a warning when an
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	408 undefined variable is referenced.
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	409
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	410 See the API documentation of the ``genshi.template.eval`` module for details.
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	411
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	412
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	413 Built-in Functions & Types
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	414 ==========================
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	415
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	416 The following functions and types are available by default in template code, in
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	417 addition to the standard built-ins that are available to all Python code.
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	418
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	419 .. _`defined`:
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	420
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	421 ``defined(name)``
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	422 -----------------
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	423 This function determines whether a variable of the specified name exists in
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	424 the context data, and returns ``True`` if it does.
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	425
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	426 .. _`value_of`:
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	427
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	428 ``value_of(name, default=None)``
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	429 --------------------------------
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	430 This function returns the value of the variable with the specified name if
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	431 such a variable is defined, and returns the value of the ``default``
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	432 parameter if no such variable is defined.
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	433
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	434 .. _`Markup`:
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	435
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	436 ``Markup(text)``
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	437 ----------------
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	438 The ``Markup`` type marks a given string as being safe for inclusion in markup,
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	439 meaning it will not be escaped in the serialization stage. Use this with care,
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	440 as not escaping a user-provided string may allow malicious users to open your
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	441 web site to cross-site scripting attacks.
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	442
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	443 .. _`Undefined`:
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	444
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	445 ``Undefined``
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	446 ----------------
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	447 The ``Undefined`` type can be used to check whether a reference variable is
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	448 defined, as explained in `error handling`_.
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	449
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	450
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	451 .. _`directives`:
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	452
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	453 -------------------
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	454 Template Directives
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	455 -------------------
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	456
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	457 Directives provide control flow functionality for templates, such as conditions
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	458 or iteration. As the syntax for directives depends on whether you're using
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	459 markup or text templates, refer to the
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	460 `XML Template Language <xml-templates.html>`_ or
97544725bb7f Back out [510] and instead implement configurable error handling modes. The default is the old 0.3.x behaviour, but more strict error handling is available as an option. cmlenz parents: diff changeset	461 `Text Template Language <text-templates.html>`_ pages for information.

Mercurial > genshi > mirror

annotate doc/templates.txt @ 839:62b7d1a058dd stable-0.5.x