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Wiki Macros
Trac macros are plugins to extend the Trac engine with custom 'functions' written in Python. A macro inserts dynamic HTML data in any context supporting WikiFormatting.
Another kind of macros are WikiProcessors. They typically deal with alternate markup formats and representation of larger blocks of information (like source code highlighting).
Using Macros
Macro calls are enclosed in two square brackets. Like python functions, macros can also have arguments, a comma separated list within parentheses.
Examples
[[Timestamp]]
Display:
[[HelloWorld(Testing)]]
Display:
Available Macros
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 mod_python.
[[Image]]
Embed an image in wiki-formatted text.
The first argument is the file specification. The file specification may reference attachments 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).
Files can also be accessed with a direct URLs; /file for a project-relative, //file for a server-relative, or http://server/file for absolute location of the file.
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, center, top, bottom and middle are interpreted as the alignment for the image (alternatively, the first three can be specified using align=... and the last three using valign=...)
- link=some TracLinks... replaces the link to the image source by the one specified using a TracLinks. If no value is specified, the link is simply removed.
- nolink means without link to image source (deprecated, use link=)
- key=value style are interpreted as HTML attributes or CSS style
indications for the image. Valid keys are:
- align, valign, border, width, height, alt, title, longdesc, class, margin, margin-(left,right,top,bottom), id and usemap
- border, margin, and margin-* can only be a single number
- margin is superseded by center which uses auto margins
Examples:
[[Image(photo.jpg)]] # simplest
[[Image(photo.jpg, 120px)]] # with image width 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@…>
[[InterTrac]]
Provide a list of known InterTrac prefixes.
[[InterWiki]]
Provide a description list for the known InterWiki prefixes.
[[KnownMimeTypes]]
List all known mime-types which can be used as WikiProcessors.
Can be given an optional argument which is interpreted as mime-type filter.
[[MacroList]]
Display 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!
[[PageOutline]]
Display a structural outline of the current wiki page, each item in the outline being a link to the corresponding heading.
This macro accepts four 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.
- The fourth parameter specifies whether the outline is numbered or not. It can be either numbered or unnumbered (the former being the default). This parameter only has an effect in inline style.
[[RecentChanges]]
List all pages that have recently been modified, ordered by the time they were last modified.
This macro accepts two ordered arguments and a named argument. The named argument can be placed in any position within the argument list.
The first parameter 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 included in the list.
The second parameter is the maximum number of pages to include in the list.
The group parameter determines how the list is presented:
- group=date
- The pages are presented in bulleted lists that are grouped by date (default).
- group=none
- The pages are presented in a single bulleted list.
Tip: if you only want to specify a maximum number of entries and don't want to filter by prefix, specify an empty first parameter, e.g. [[RecentChanges(,10,group=none)]].
[[RepositoryIndex]]
Display the list of available repositories.
Can be given the following named arguments:
- format
-
Select the rendering format:
- compact produces a comma-separated list of repository prefix names (default)
- list produces a description list of repository prefix names
- table produces a table view, similar to the one visible in the Browse View page
- glob
- Do a glob-style filtering on the repository names (defaults to '*')
- order
- Order repositories by the given column (one of "name", "date" or "author")
- desc
- When set to 1, order by descending order
(since 0.12)
[[TicketQuery]]
Wiki macro listing tickets that match certain criteria.
This macro accepts a comma-separated list of keyed parameters, in the form "key=value".
If the key is the name of a field, the value must use the syntax of a filter specifier as defined in TracQuery#QueryLanguage. Note that this is not the same as the simplified URL syntax used for query: links starting with a ? character. Commas (,) can be included in field values by escaping them with a backslash (\).
Groups of field constraints to be OR-ed together can be separated by a litteral or argument.
In addition to filters, several other named parameters can be used to control how the results are presented. All of them are optional.
The format parameter determines how the list of tickets is presented:
- list -- the default presentation is to list the ticket ID next to the summary, with each ticket on a separate line.
- compact -- the tickets are presented as a comma-separated list of ticket IDs.
- count -- only the count of matching tickets is displayed
- table -- a view similar to the custom query view (but without the controls)
- progress -- a view similar to the milestone progress bars
The max parameter can be used to limit the number of tickets shown (defaults to 0, i.e. no maximum).
The order parameter sets the field used for ordering tickets (defaults to id).
The desc parameter indicates whether the order of the tickets should be reversed (defaults to false).
The group parameter sets the field used for grouping tickets (defaults to not being set).
The groupdesc parameter indicates whether the natural display order of the groups should be reversed (defaults to false).
The verbose parameter can be set to a true value in order to get the description for the listed tickets. For table format only. deprecated in favor of the rows parameter
The rows parameter can be used to specify which field(s) should be viewed as a row, e.g. rows=description|summary
For compatibility with Trac 0.10, if there's a last positional parameter given to the macro, it will be used to specify the format. Also, using "&" as a field separator still works (except for order) but is deprecated.
[[TitleIndex]]
Insert 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. If the prefix is specified, a second argument of value hideprefix can be given as well, in order to remove that prefix from the output.
Alternate format and depth named parameters can be specified:
- format=compact: The pages are displayed as comma-separated links.
- format=group: The list of pages will be structured in groups according to common prefix. This format also supports a min=n argument, where n is the minimal number of pages for a group.
- format=hierarchy: The list of pages will be structured according to the page name path hierarchy. This format also supports a min=n argument, where higher n flatten the display hierarchy
- depth=n: limit the depth of the pages to list. If set to 0, only toplevel pages will be shown, if set to 1, only immediate children pages will be shown, etc. If not set, or set to -1, all pages in the hierarchy will be shown.
- include=page1:page*2: include only pages that match an item in the colon-separated list of pages. If the list is empty, or if no include argument is given, include all pages.
- exclude=page1:page*2: exclude pages that match an item in the colon- separated list of pages.
The include and exclude lists accept shell-style patterns.
[[TracAdminHelp]]
Display 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
[[TracGuideToc]]
Display a table of content for the Trac guide.
This macro shows a quick and dirty way to make a table-of-contents for the Help/Guide. The table of contents will contain the Trac* and WikiFormatting pages, and can't be customized. Search for TocMacro for a a more customizable table of contents.
[[TracIni]]
Produce documentation for the 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.
[[Workflow]]
Render a workflow graph.
This macro accepts a TracWorkflow configuration and renders the states and transitions as a directed graph. If no parameters are given, the current ticket workflow is rendered. In WikiProcessors mode the width and height arguments can be specified.
(Defaults: width = 800 and heigth = 600)
Examples:
[[Workflow()]]
[[Workflow(go = here -> there; return = there -> here)]]
{{{
#!Workflow width=700 height=700
leave = * -> *
leave.operations = leave_status
leave.default = 1
accept = new,assigned,accepted,reopened -> accepted
accept.permissions = TICKET_MODIFY
accept.operations = set_owner_to_self
resolve = new,assigned,accepted,reopened -> closed
resolve.permissions = TICKET_MODIFY
resolve.operations = set_resolution
reassign = new,assigned,accepted,reopened -> assigned
reassign.permissions = TICKET_MODIFY
reassign.operations = set_owner
reopen = closed -> reopened
reopen.permissions = TICKET_CREATE
reopen.operations = del_resolution
}}}
Macros from around the world
The Trac Project has a section dedicated to user-contributed macros, MacroBazaar. If you're looking for new macros, or have written new ones to share with the world, don't hesitate adding it to the MacroBazaar wiki page.
Developing Custom Macros
Macros, like Trac itself, are written in the Python programming language. They are very simple modules, identified by the filename and should contain a single entry point function. Trac will display the returned data inserted into the HTML where the macro was called.
It's easiest to learn from an example:
# MyMacro.py -- The world's simplest macro
def execute(hdf, args, env):
return "Hello World called with args: %s" % args
You can also use the environment (env) object, for example to access configuration data and the database, for example:
def execute(hdf, txt, env):
return env.get_config('trac', 'repository_dir')
Note that since version 0.9, wiki macros can also be written as TracPlugins. This gives them some capabilities than “classic” macros do not have, such as directly access the HTTP request.
For more information about developing macros, see the development resources on the main project site.
See also: WikiProcessors, WikiFormatting, TracGuide
