Wiki マクロ

Wiki マクロとは、 Python で書かれた 'カスタム関数' によって Trac の Wiki エンジンを拡張するプラグインです。 WikiFormatting エンジンが利用可能なあらゆるコンテキストにおいて、マクロを使用することによって、動的な HTML データが挿入されます。

もう 1 種類のマクロは WikiProcessors です。これは通常、Wiki以外のマークアップ形式と表示を取り扱うために使用し、多くは、 (ソースコードハイライトのような) より大きいブロックに使用します。

マクロの利用

マクロ呼び出しは、二つの 角括弧 (square brackets) で括られた箇所です。 Python 関数のように、マクロは引数を取ることができ、括弧 (parenthesis) の中に、カンマで区切ったリストで表記します。

利用例

 [[Timestamp]]

は、以下のように表示されます:

Wed Aug 20 21:05:18 2008 

 [[HelloWorld(Testing)]]

は、以下のように表示されます:

Hello World, args = Testing

マクロ一覧

Note: 以下に示すリストはマクロドキュメントを含むものだけです。 -OO による最適化や、 mod_python での PythonOptimize オプションが設定されていると表示されません。

[[InterTrac]]

Provide a list of known InterTrac prefixes.

[[TitleIndex]]

Inserts an alphabetic list of all wiki pages into the output.

Accepts a prefix string as parameter: if provided, only pages with names that start with the prefix are included in the resulting list. If this parameter is omitted, all pages are listed.

[[RecentChanges]]

Lists all pages that have recently been modified, grouping them by the day they were last modified.

This macro accepts two parameters. The first is a prefix string: if provided, only pages with names that start with the prefix are included in the resulting list. If this parameter is omitted, all pages are listed.

The second parameter is a number for limiting the number of pages returned. For example, specifying a limit of 5 will result in only the five most recently changed pages to be included in the list.

[[PageOutline]]

Displays a structural outline of the current wiki page, each item in the outline being a link to the corresponding heading.

This macro accepts three optional parameters:

  • The first is a number or range that allows configuring the minimum and maximum level of headings that should be included in the outline. For example, specifying "1" here will result in only the top-level headings being included in the outline. Specifying "2-3" will make the outline include all headings of level 2 and 3, as a nested list. The default is to include all heading levels.
  • The second parameter can be used to specify a custom title (the default is no title).
  • The third parameter selects the style of the outline. This can be either inline or pullout (the latter being the default). The inline style renders the outline as normal part of the content, while pullout causes the outline to be rendered in a box that is by default floated to the right side of the other content.
[[Image]]

Embed an image in wiki-formatted text.

The first argument is the file specification. The file specification may reference attachments or files in three ways:

  • module:id:file, where module can be either wiki or ticket, to refer to the attachment named file of the specified wiki page or ticket.
  • id:file: same as above, but id is either a ticket shorthand or a Wiki page name.
  • file to refer to a local attachment named 'file'. This only works from within that wiki page or a ticket.

Also, the file specification may refer to repository files, using the source:file syntax (source:file@rev works also).

The remaining arguments are optional and allow configuring the attributes and style of the rendered <img> element:

  • digits and unit are interpreted as the size (ex. 120, 25%) for the image
  • right, left, top or bottom are interpreted as the alignment for the image
  • nolink means without link to image source.
  • key=value style are interpreted as HTML attributes or CSS style

indications for the image. Valid keys are:

  • align, border, width, height, alt, title, longdesc, class, id and usemap
  • border can only be a number

Examples: 

    [[Image(photo.jpg)]]                           # simplest
    [[Image(photo.jpg, 120px)]]                    # with size
    [[Image(photo.jpg, right)]]                    # aligned by keyword
    [[Image(photo.jpg, nolink)]]                   # without link to source
    [[Image(photo.jpg, align=right)]]              # aligned by attribute

You can use image from other page, other ticket or other module. 

    [[Image(OtherPage:foo.bmp)]]    # if current module is wiki
    [[Image(base/sub:bar.bmp)]]     # from hierarchical wiki page
    [[Image(#3:baz.bmp)]]           # if in a ticket, point to #3
    [[Image(ticket:36:boo.jpg)]]
    [[Image(source:/images/bee.jpg)]] # straight from the repository!
    [[Image(htdocs:foo/bar.png)]]   # image file in project htdocs dir.

Adapted from the Image.py macro created by Shun-ichi Goto <gotoh@taiyo.co.jp>

[[MacroList]]

Displays a list of all installed Wiki macros, including documentation if available.

Optionally, the name of a specific macro can be provided as an argument. In that case, only the documentation for that macro will be rendered.

Note that this macro will not be able to display the documentation of macros if the PythonOptimize option is enabled for mod_python!

[[TracIni]]

Produce documentation for Trac configuration file.

Typically, this will be used in the TracIni page. Optional arguments are a configuration section filter, and a configuration option name filter: only the configuration options whose section and name start with the filters are output.

[[HelloWorld]]

Example macro.

[[Timestamp]]

Inserts the current time (in seconds) into the wiki page.

[[TracGuideToc]]

This macro shows a quick and dirty way to make a table-of-contents for a set of wiki pages.

[[TracAdminHelp]]

Displays help for trac-admin commands.

Examples: 

[[TracAdminHelp]]               # all commands
[[TracAdminHelp(wiki)]]         # all wiki commands
[[TracAdminHelp(wiki export)]]  # the "wiki export" command
[[TracAdminHelp(upgrade)]]      # the upgrade command
[[TicketQuery]]

Macro that lists tickets that match certain criteria.

This macro accepts two parameters, the second of which is optional.

The first parameter is the query itself, and uses the same syntax as for query: wiki links (but not the variant syntax starting with "?").

The second parameter determines how the list of tickets is presented: the default presentation is to list the ticket ID next to the summary, with each ticket on a separate line. If the second parameter is given, it must be one of:

  • compact -- the tickets are presented as a comma-separated list of ticket IDs.
  • count -- only the count of matching tickets is displayed

Macros from around the world

The Trac Hacks site provides a wide collection of macros and other Trac plugins contributed by the Trac community. If you're looking for new macros, or have written one that you'd like to share with the world, please don't hesitate to visit that site.

カスタムマクロを開発する

マクロは、 Trac 自身と同じように Python programming language で書かれています。とてもシンプルなモジュールで、たった一つの execute() 関数だけを持ちます。マクロの識別はファイル名で行います。 Trac は、呼び出されたマクロが返却したデータをマクロが呼び出された Wiki ページの HTML に挿入して表示を行います。

最も簡単なマクロの例です: 

# MyMacro.py -- The world's simplest macro

def execute(hdf, args, env):
    return "Hello World called with args: %s" % args

Environment (env) オブジェクトを使用することも出来ます。この例では、コンフィグレーションとデータベースにアクセスしています: 

def execute(hdf, txt, env):
    return env.config.get('trac', 'repository_dir')

Note: バージョン 0.9 以降、 Wiki マクロは TracPlugins でも書くことが出来るようになりました。これによって、 HTTP request へのダイレクトアクセスなど、 "古い" マクロでは実現できなかったことが出来るようになりました。

マクロ開発についての詳しい情報は、プロジェクトメインサイトの 開発リソース を参照してください。

See also: WikiProcessors, WikiFormatting, TracGuide