Changes between Version 4 and Version 5 of WikiMacros
- Timestamp:
- May 8, 2022, 3:12:15 PM (2 years ago)
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WikiMacros
v4 v5 3 3 [[PageOutline(2-5,Contents,pullout)]] 4 4 5 '''Trac macros''' extend the Trac engine with custom functionality. Macros are a special type of plugin and are written in Python. A macro inserts dynamic HTML datain any context supporting WikiFormatting.5 '''Trac macros''' extend Trac with custom functionality. Macros are a special type of plugin and are written in Python. A macro generates HTML in any context supporting WikiFormatting. 6 6 7 7 The macro syntax is `[[macro-name(optional-arguments)]]`. 8 8 9 '''WikiProcessors''' are another kind of macro s. They are typically used for source code highlighting, such as `!#python` or `!#apache` and when the source code spans multiple lines, such as:9 '''WikiProcessors''' are another kind of macro, commonly used for source code highlighting using a processor like `!#python` or `!#apache`: 10 10 11 11 {{{ 12 12 {{{#!wiki-processor-name 13 ... 13 ... 14 14 }}} 15 15 }}} … … 17 17 == Using Macros 18 18 19 Macro calls are enclosed in double-square brackets `[[..]]`. Like Python functions, macros can have arguments, which is then a comma separated list within parentheses `[[..(,)]]`. 20 21 === Getting Detailed Help 22 23 The list of available macros and the full help can be obtained using the !MacroList macro, as seen [#AvailableMacros below]. 24 25 A brief list can be obtained via `[[MacroList(*)]]` or `[[?]]`. 26 27 Detailed help on a specific macro can be obtained by passing it as an argument to !MacroList, e.g. `[[MacroList(MacroList)]]`, or, more conveniently, by appending a question mark (`?`) to the macro's name, like in `[[MacroList?]]`. 28 29 === Example 30 31 A list of the 3 most recently changed wiki pages starting with 'Trac': 19 Macro calls are enclosed in double-square brackets `[[..]]`. Like Python functions macros can have arguments, which take the form of a comma separated list within parentheses `[[..(,)]]`. A common macro used is a list of the 3 most recent changes to a wiki page, or here, for example, all wiki pages starting with 'Trac': 32 20 33 21 ||= Wiki Markup =||= Display =|| … … 40 28 [[RecentChanges(Trac,3)]] 41 29 }}} 42 |-----------------------------------43 {{{#!td44 {{{45 [[RecentChanges?(Trac,3)]]46 }}}47 }}}48 {{{#!td style="padding-left: 2em;"49 [[RecentChanges?(Trac,3)]]50 }}}51 |-----------------------------------52 {{{#!td53 {{{54 [[?]]55 }}}56 }}}57 {{{#!td style="padding-left: 2em"58 {{{#!html59 <div class="trac-macrolist">60 <h3><code>[[Image]]</code></h3>Embed an image in wiki-formatted text.61 30 62 The first argument is the file, as in <code>[[Image(filename.png)]]</code> 63 <h3><code>[[InterTrac]]</code></h3>Provide a list of known <a class="wiki" href="/wiki/InterTrac">InterTrac</a> prefixes. 64 <h3><code>[[InterWiki]]</code></h3>Provide a description list for the known <a class="wiki" href="/wiki/InterWiki">InterWiki</a> prefixes. 65 <h3><code>[[KnownMimeTypes]]</code></h3>List all known mime-types which can be used as <a class="wiki" href="/wiki/WikiProcessors">WikiProcessors</a>. 66 </div> 67 }}} 68 etc. 69 }}} 31 === Getting Detailed Help 32 33 The list of available macros and the full help can be obtained using the !MacroList macro, see [#AvailableMacros below]. 34 35 A brief list can be obtained via `[[MacroList(*)]]` or `[[?]]`. 36 37 Detailed help on a specific macro can be obtained by passing it as an argument to !MacroList, e.g. `[[MacroList(MacroList)]]`, or more conveniently, by appending a question mark (`?`) to the macro's name, like in `[[MacroList?]]`. 70 38 71 39 == Available Macros 72 40 73 ''Note that the following list will only contain the macro documentation if you've not enabled `-OO` optimizations, or not set the `PythonOptimize` option for [wiki:TracModPython mod_python].''74 75 41 [[MacroList]] 76 42 77 == Macros from around the world43 == Contributed macros 78 44 79 The [http ://trac-hacks.org/ Trac Hacks] site provides a wide collection of macros and other Trac [TracPlugins plugins] contributed by the Trac community. If you are looking for new macros, or have written one that you would like to share, please visit that site.45 The [https://trac-hacks.org/ Trac Hacks] site provides a large collection of macros and other Trac [TracPlugins plugins] contributed by the Trac community. If you are looking for new macros, or have written one that you would like to share, please visit that site. 80 46 81 47 == Developing Custom Macros 82 48 83 Macros, like Trac itself, are written in the [http ://python.org/ Python programming language] and are developed as part of TracPlugins.49 Macros, like Trac itself, are written in the [https://python.org/ Python programming language] and are a type of [TracPlugins plugin]. 84 50 85 For more information about developing macros, see the [trac:TracDev development resources] on the main project site. 86 87 Here are 2 simple examples showing how to create a Macro. Also, have a look at [trac:source:tags/trac-1.0.2/sample-plugins/Timestamp.py Timestamp.py] for an example that shows the difference between old style and new style macros and at the [trac:source:tags/trac-0.11/wiki-macros/README macros/README] which provides more insight about the transition. 51 Here are 2 simple examples showing how to create a Macro. For more information about developing macros, see the [trac:TracDev development resources] and [trac:browser:branches/1.4-stable/sample-plugins sample-plugins]. 88 52 89 53 === Macro without arguments 90 54 91 To test the following code, save it in a `timestamp_sample.py` file locatedin the TracEnvironment's `plugins/` directory.55 To test the following code, copy it to `timestamp_sample.py` in the TracEnvironment's `plugins/` directory. 92 56 93 57 {{{#!python 94 from datetime import datetime 95 # Note: since Trac 0.11, datetime objects are used internally 96 97 from genshi.builder import tag 98 99 from trac.util.datefmt import format_datetime, utc 58 from trac.util.datefmt import datetime_now, format_datetime, utc 59 from trac.util.html import tag 100 60 from trac.wiki.macros import WikiMacroBase 101 61 102 class Time StampMacro(WikiMacroBase):103 """Inserts the current time (in seconds) into the wiki page."""62 class TimestampMacro(WikiMacroBase): 63 _description = "Inserts the current time (in seconds) into the wiki page." 104 64 105 revision = "$Rev$" 106 url = "$URL$" 107 108 def expand_macro(self, formatter, name, text): 109 t = datetime.now(utc) 65 def expand_macro(self, formatter, name, content, args=None): 66 t = datetime_now(utc) 110 67 return tag.strong(format_datetime(t, '%c')) 111 68 }}} … … 113 70 === Macro with arguments 114 71 115 To test the following code, save it in a `helloworld_sample.py` file locatedin the TracEnvironment's `plugins/` directory.72 To test the following code, copy it to `helloworld_sample.py` in the TracEnvironment's `plugins/` directory. 116 73 117 74 {{{#!python 118 from genshi.core import Markup 119 75 from trac.util.translation import cleandoc_ 120 76 from trac.wiki.macros import WikiMacroBase 121 77 122 78 class HelloWorldMacro(WikiMacroBase): 79 _description = cleandoc_( 123 80 """Simple HelloWorld macro. 124 81 … … 130 87 will become the documentation of the macro, as shown by 131 88 the !MacroList macro (usually used in the WikiMacros page). 132 """ 89 """) 133 90 134 revision = "$Rev$" 135 url = "$URL$" 136 137 def expand_macro(self, formatter, name, text, args): 91 def expand_macro(self, formatter, name, content, args=None): 138 92 """Return some output that will be displayed in the Wiki content. 139 93 140 94 `name` is the actual name of the macro (no surprise, here it'll be 141 95 `'HelloWorld'`), 142 `text` is the text enclosed in parenthesis at the call of the macro. 143 Note that if there are ''no'' parenthesis (like in, e.g. 144 [[HelloWorld]]), then `text` is `None`. 145 `args` are the arguments passed when HelloWorld is called using a 146 `#!HelloWorld` code block. 96 `content` is the text enclosed in parenthesis at the call of the 97 macro. Note that if there are ''no'' parenthesis (like in, e.g. 98 [[HelloWorld]]), then `content` is `None`. 99 `args` will contain a dictionary of arguments when called using the 100 Wiki processor syntax and will be `None` if called using the 101 macro syntax. 147 102 """ 148 return 'Hello World, text = %s, args = %s' % \ 149 (Markup.escape(text), Markup.escape(repr(args))) 150 103 return 'Hello World, content = ' + unicode(content) 151 104 }}} 152 105 153 Note that `expand_macro` optionally takes a 4^th^ parameter ''`args`''. When the macro is called as a [WikiProcessors WikiProcessor], it is also possible to pass `key=value` [WikiProcessors#UsingProcessors processor parameters]. If given, those are stored in a dictionary and passed in this extra `args` parameter. In the other case, when called as a macro, `args` is `None`. (''since 0.12'').106 Note that `expand_macro` optionally takes a 4^th^ parameter ''`args`''. When the macro is called as a [WikiProcessors WikiProcessor], it is also possible to pass `key=value` [WikiProcessors#UsingProcessors processor parameters]. If given, those are stored in a dictionary and passed in this extra `args` parameter. When called as a macro, `args` is `None`. 154 107 155 108 For example, when writing: … … 173 126 }}} 174 127 175 Note that the return value of `expand_macro` is '''not''' HTML escaped. Depending on the expected result, you should escape it yourself (using `return Markup.escape(result)`) or, if this is indeed HTML, wrap it in a Markup object (`return Markup(result)`) with `Markup` coming from Genshi (`from genshi.coreimport Markup`).128 Note that the return value of `expand_macro` is '''not''' HTML escaped. Depending on the expected result, you should escape it yourself (using `return Markup.escape(result)`), or if this is indeed HTML, wrap it in a Markup object: `return Markup(result)` (`from trac.util.html import Markup`). 176 129 177 You can also recursively use a wiki Formatter (`from trac.wiki import Formatter`) to process the `text` as wiki markup:130 You can also recursively use a wiki formatter to process the `content` as wiki markup: 178 131 179 132 {{{#!python 180 from genshi.core import Markup133 from trac.wiki.formatter import format_to_html 181 134 from trac.wiki.macros import WikiMacroBase 182 from trac.wiki import Formatter183 import StringIO184 135 185 136 class HelloWorldMacro(WikiMacroBase): 186 def expand_macro(self, formatter, name, text, args): 187 text = "whatever '''wiki''' markup you want, even containing other macros" 188 # Convert Wiki markup to HTML, new style 189 out = StringIO.StringIO() 190 Formatter(self.env, formatter.context).format(text, out) 191 return Markup(out.getvalue()) 137 def expand_macro(self, formatter, name, content, args): 138 content = "any '''wiki''' markup you want, even containing other macros" 139 # Convert Wiki markup to HTML 140 return format_to_html(self.env, formatter.context, content) 192 141 }}}