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Trac Macros

Trac 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. Its syntax is [[macro-name(optional-arguments)]].

The WikiProcessors are another kind of macros. They typically deal with alternate markup formats and transformation of larger "blocks" of information, like source code highlighting. They are used for processing the multiline {{{#!wiki-processor-name ... }}} blocks.

Using Macros

Macro calls are enclosed in two square brackets [[..]]. Like Python functions, macros can also have arguments, a comma separated list within parentheses [[..(,)]].

Getting Detailed Help

The list of available macros and the full help can be obtained using the MacroList macro, as seen below.

A brief list can be obtained via [[MacroList(*)]] or [[?]].

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?]].

Example

A list of the 3 most recently changed wiki pages starting with 'Trac':

Wiki Markup Display

[[RecentChanges(Trac,3)]]

Jun 15, 2016

[[RecentChanges?(Trac,3)]]

`[[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)]].

[[?]]

`[[Image]]`

Embed an image in wiki-formatted text. The first argument is the file …

`[[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 …

etc.

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.

`[[CRev]]`

Provides the macro

   [[CRev(attribut, rev)]]

The two parameters attribut and rev are optional. If rev is missing, the current revision will be used. Attribut can be 0 (default),1,2 or 3 and is linked as follows: 0 Revision number 1 Timestamp of the revision 2 Author of the revision 3 Commit message of the revision

`[[DownloadsCount]]`

Aliases: [[ListDownloads]]

`[[FootNote]]`

Collates and generates foot-notes. Call the macro with the foot-note content as the only argument:

   [[FootNote(This is a footnote)]]

Foot-notes are numbered by the order in which they appear. To create a reference to an existing foot-note, pass the footnote number as argument to the macro:

   [[FootNote(1)]]

In addition, identical foot-notes are coalesced into one entry. The following will generate one footnote entry with two references:

   Some text[[FootNote(A footnote)]] and some more text [[FootNote(A footnote)]].

A list of footnotes generated by one or more of the above commands is produced by calling the macro without arguments:

   [[FootNote]]

Once a set of footnotes has been displayed, a complete new set of footnotes can be created. This allows multiple sets of footnotes per page.

`[[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 rfc2397 data URL scheme is also supported if the URL is enclosed in quotes.

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. 120px, 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.
inline specifies that the content generated be an inline XHTML element. By default, inline content is not generated, therefore images won't be rendered in section headings and other one-line content.
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 (units are pixels).
- 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 an image from a wiki page, ticket or other module.

[[Image(OtherPage:foo.bmp)]]    # from a wiki page
[[Image(base/sub:bar.bmp)]]     # from hierarchical wiki page
[[Image(#3:baz.bmp)]]           # from another ticket
[[Image(ticket:36:boo.jpg)]]    # from another ticket (long form)
[[Image(source:/img/bee.jpg)]]  # from the repository
[[Image(htdocs:foo/bar.png)]]   # from project htdocs dir
[[Image(shared:foo/bar.png)]]   # from shared htdocs dir (since 1.0.2)

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.

`[[Latex]]`

This plugin allows embedded equations in Trac markup. Basically a port of http://www.amk.ca/python/code/mt-math to Trac.

Simply use
  {{{
  #!Latex
  [latex code]
  }}}
for a block of LaTeX code.

If use_dollars is enabled in trac.ini, then you can also use $[latex formula]$ for inline math or $$[latex formula]$$ for display math.

`[[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!

`[[NoteBox]]`

Renders a small colored box with an icon and text.

To display a NoteBox on a page, you must call the NoteBox macro and pass the style and text as arguments. The text may contain wiki formatting, however it is not possible to embed other wiki macros within the macro. Also, commas must be escaped with a backslash.

A third optional argument allows the width of the NoteBox to be specified. The width can be specified in pixels as a percent of the page width. The default width is 70%.

The following styles are available: warn, tip and note.

Examples:

[[NoteBox(warn,If you don't run `update` before `commit`\, your checkin may fail.)]]
[[NoteBox(tip,The !NoteBox macro can bring '''attention''' to text within a page.,50%)]]
[[NoteBox(note,More styles may be added in a ''future'' release.,350px)]]

If you don't run update before commit, your checkin may fail.

The NoteBox macro can bring attention to text within a page.

More styles may be added in a future release.

`[[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.

`[[ProjectStats]]`

Wiki macro listing some generic Trac statistics.

This macro accepts a comma-separated list of keyed parameters, in the form "key=value". Valid keys:

wiki -- statistics for TracWiki, values:
- count -- show wiki page count
prefix -- use with wiki key: only names that start with that prefix are included

'count' is also recognized without prepended key name.

`[[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 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)]].

`[[RecentTopics]]`

Lists all topics, that have been recently active, grouping them by the day they were lastly active. Accepts two parameters: First one is a forum ID. If provided, only topics in that forum are included in the resulting list. Otherwise topics from all forums are listed. Second parameter is a number. I. e. specifying 5 will result in only the five most recently active topics to be included in the list.

`[[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 literal 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

The col parameter can be used to specify which fields should be viewed as columns. For table format only.

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.

`[[TracJSGanttChart]]`

Displays a Gantt chart for the specified tickets.

The chart display can be controlled with a number of macro arguments:

Argument	Description	Default
`formats`	What to display in the format control. A pipe-separated list of `minute`, `hour`, `day`, `week`, `month`, and `quarter` (though `minute` may not be very useful).	'day\|week\|month\|quarter'
`format`	Initial display format, one of those listed in `formats`	First format
`sample`	Display sample tasks (1) or not (0)	0
`res`	Show resource column (1) or not (0)	1
`dur`	Show duration colunn (1) or not (0)	1
`comp`	Show percent complete column (1) or not (0)	1
`caption`	Caption to place to right of tasks: None, Caption, Resource, Duration, %Complete	Resource
`startDate`	Show start date column (1) or not (0)	1
`endDate`	Show end date column (1) or not (0)	1
`dateDisplay`	Date display format: 'mm/dd/yyyy', 'dd/mm/yyyy', or 'yyyy-mm-dd'	'mm/dd/yyyy'
`openLevel`	Number of levels of tasks to show. 1 = only top level task.	999
`colorBy`	Field to use to choose task colors. Each unique value of the field will have a different color task. Other likely useful values are owner and milestone but any field can be used.	priority
`root`	When using something like Subtickets plugin to maintain a tree of tickets and subtickets, you may create a Gantt showing a ticket and all of its descendants with `root=<ticket#>`. The macro uses the configured `parent` field to find all descendant tasks and build an `id=` argument for Trac's native query handler. Multiple roots may be provided like `root=1\|12\|32`. When used in a ticket description or comment, `root=self` will display the current ticket's descendants.	None
`goal`	When using something like MasterTickets? plugin to maintain ticket dependencies, you may create a Gantt showing a ticket and all of its predecessors with `goal=<ticket#>`. The macro uses the configured `succ` field to find all predecessor tasks and build an `id=` argument for Trac's native query handler. Multiple goals may be provided like `goal=1\|12\|32`. When used in a ticket description or comment, `goal=self` will display the current ticket's predecessors.	None
`lwidth`	The width, in pixels, of the table of task names, etc. on the left of the Gantt.
`showdep`	Show dependencies (1) or not (0)	1
`userMap`	Map user !IDs to full names (1) or not (0).	1
`omitMilestones`	Show milestones for displayed tickets (0) or only those specified by `milestone=` (1)	0
`schedule`	Schedule tasks based on dependenies and estimates. Either as soon as possible (asap) or as late as possible (alap)	alap
`doResourceLeveling`	Resolve resource conflicts (1) or not (0) when scheduling tickets.	0
`display`	Filter for limiting display of tickets. `owner:fred` shows only tickets owned by fred. `status:closed` shows only closed tickets.	None
`order`	Order of fields used to sort tickets before display. `order=milestone` sorts by milestone. May include ticket fields, including custom fields, or "wbs" (work breakdown structure).	wbs

Site-wide defaults for macro arguments may be set in the trac-jsgantt section of trac.ini. option.<opt> overrides the built-in default for <opt> from the table above.

All other macro arguments are treated as TracQuery specification (e.g., milestone=ms1|ms2) to control which tickets are displayed.

`[[TracNav]]`

Aliases: [[JPNav]]

TracNav: The Navigation Bar for Trac

This macro implements a fully customizable navigation bar for the Trac wiki engine. The contents of the navigation bar is a wiki page itself and can be edited like any other wiki page through the web interface. The navigation bar supports hierarchical ordering of topics. The design of TracNav mimics the design of the TracGuideToc that was originally supplied with Trac. The drawback of TracGuideToc is that it is not customizable without editing its source code and that it does not support hierarchical ordering.

Installation

See http://trac.edgewall.org/wiki/TracPlugins.

Usage

To use TracNav, create an index page for your site and call the TracNav? macro on each page, where the navigation bar should be displayed. The index page is a regular wiki page. The page with the table of contents must include an unordered list of links that should be displayed in the navigation bar.

To display the navigation bar on a page, you must call the TracNav macro on that page an pass the name of your table of contents as argument.

Additional information and a life example

Please visit: http://svn.ipd.uka.de/trac/javaparty/wiki/TracNav.

Author and License

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

`[[UserQuery]]`

Wiki macro listing users that match certain criteria.

This macro accepts a comma-separated list of keyed parameters, in the form "key=value". Valid keys:

perm -- show only that users, a permission action given by value has been granted to
locked -- retrieve users, who's account has/has not been locked depending on boolean value
format -- output style: 'count', 'list' or comma-separated values (default)
nomatch -- replacement wiki markup that is displayed, if there's no match and output style isn't 'count' either

'count' is also recognized without prepended key name. Other non-keyed parameters are:

locked -- alias for 'locked=True'
visit -- show a list of accounts with last-login information, only available in table format
name -- forces replacement of maching username with their corresponding full names, if available; adds a full names column if combined with 'visit'
email -- append email address to usernames, if available

Requires USER_VIEW permission for output in any format other then 'count'. A misc placeholder with this statement is presented to unprivileged users.

`[[ViewTopic]]`

Displays content of a discussion topic. Unless argument passed, it tries to find the topic with the same name as the current wiki page. If a name is passed, displays that topic.

`[[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
    }}}

`[[access]]`

A Trac macro to display or hide parts of wiki pages based on permissions.

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 are looking for new macros, or have written one that you would like to share with the world, don't hesitate to visit that site.

Developing Custom Macros

Macros, like Trac itself, are written in the Python programming language and are developed as part of TracPlugins.

For more information about developing macros, see the development resources on the main project site.

Here are 2 simple examples showing how to create a Macro. Also, have a look at Timestamp.py for an example that shows the difference between old style and new style macros and at the macros/README which provides a little more insight about the transition.

Macro without arguments

To test the following code, you should saved it in a timestamp_sample.py file located in the TracEnvironment's plugins/ directory.

from datetime import datetime
# Note: since Trac 0.11, datetime objects are used internally

from genshi.builder import tag

from trac.util.datefmt import format_datetime, utc
from trac.wiki.macros import WikiMacroBase

class TimeStampMacro(WikiMacroBase):
    """Inserts the current time (in seconds) into the wiki page."""

    revision = "$Rev$"
    url = "$URL$"

    def expand_macro(self, formatter, name, text):
        t = datetime.now(utc)
        return tag.strong(format_datetime(t, '%c'))

Macro with arguments

To test the following code, you should save it in a helloworld_sample.py file located in the TracEnvironment's plugins/ directory.

from genshi.core import Markup

from trac.wiki.macros import WikiMacroBase

class HelloWorldMacro(WikiMacroBase):
    """Simple HelloWorld macro.

    Note that the name of the class is meaningful:
     - it must end with "Macro"
     - what comes before "Macro" ends up being the macro name

    The documentation of the class (i.e. what you're reading)
    will become the documentation of the macro, as shown by
    the !MacroList macro (usually used in the WikiMacros page).
    """

    revision = "$Rev$"
    url = "$URL$"

    def expand_macro(self, formatter, name, text, args):
        """Return some output that will be displayed in the Wiki content.

        `name` is the actual name of the macro (no surprise, here it'll be
        `'HelloWorld'`),
        `text` is the text enclosed in parenthesis at the call of the macro.
          Note that if there are ''no'' parenthesis (like in, e.g.
          [[HelloWorld]]), then `text` is `None`.
        `args` are the arguments passed when HelloWorld is called using a
        `#!HelloWorld` code block.
        """
        return 'Hello World, text = %s, args = %s' % \
            (Markup.escape(text), Markup.escape(repr(args)))

Note that expand_macro optionally takes a 4^th parameter args. When the macro is called as a WikiProcessor, it's also possible to pass key=value processor parameters. If given, those are stored in a dictionary and passed in this extra args parameter. On the contrary, when called as a macro, args is None. (since 0.12).

For example, when writing:

{{{#!HelloWorld style="polite" -silent verbose
<Hello World!>
}}}

{{{#!HelloWorld
<Hello World!>
}}}

[[HelloWorld(<Hello World!>)]]

One should get:

Hello World, text = <Hello World!> , args = {'style': u'polite', 'silent': False, 'verbose': True}
Hello World, text = <Hello World!> , args = {}
Hello World, text = <Hello World!> , args = None

Note that the return value of expand_macro is not HTML escaped. Depending on the expected result, you should escape it by 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.core import Markup).

You can also recursively use a wiki Formatter (from trac.wiki import Formatter) to process the text as wiki markup:

from genshi.core import Markup
from trac.wiki.macros import WikiMacroBase
from trac.wiki import Formatter
import StringIO

class HelloWorldMacro(WikiMacroBase):
        def expand_macro(self, formatter, name, text, args):
                text = "whatever '''wiki''' markup you want, even containing other macros"
                # Convert Wiki markup to HTML, new style
                out = StringIO.StringIO()
                Formatter(self.env, formatter.context).format(text, out)
                return Markup(out.getvalue())

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