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).
Macro calls are enclosed in two square brackets. Like Python functions, macros can also have arguments, a comma separated list within parentheses.
Trac macros can also be written as TracPlugins. This gives them some capabilities that macros do not have, such as being able to directly access the HTTP request.
A list of 3 most recently changed wiki pages starting with 'Trac':
[[RecentChanges(Trac,3)]]
Display:
25/02/2016
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.
[[DownloadsCount]]
Alias: [[ListDownloads]]
[[Image]]
Embed an image in wiki-formatted text.
The first argument is the file specification. The file specification may reference attachments in three ways:
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:
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.
[[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:
[[PlantUml]]
Alias: [[plantuml]]
[[PlantUML]]
A wiki processor that renders PlantUML diagrams in wiki text.
Example:
{{{ #!PlantUML @startuml Alice -> Bob: Authentication Reque st Bob --> Alice: Authentication Response Alice -> Bob: Another authentication Request Alice <-- Bob: another authentication Response @enduml }}}
Results in:
[[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:
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:
(since 0.12)
[[TOC]]
Generate a table of contents for the current page or a set of pages.
If no arguments are given, a table of contents is generated for the current page, with the top-level title stripped:
[[TOC]]
To generate a table of contents for a set of pages, simply pass them as comma separated arguments to the TOC macro, e.g. as in
[[TOC(TracGuide, TracInstall, TracUpgrade, TracIni, TracAdmin, TracBackup, TracLogging, TracPermissions, TracWiki, WikiFormatting, TracBrowser, TracRoadmap, TracChangeset, TracTickets, TracReports, TracQuery, TracTimeline, TracRss, TracNotification)]]
A wildcard * can be used to fetch a sorted list of all pages starting with the preceding pagename stub:
[[TOC(Trac*, WikiFormatting, WikiMacros)]]
The following control arguments change the default behaviour of the TOC macro:
Argument | Description |
---|---|
heading=<x> | Override the default heading of "Table of Contents" |
noheading | Suppress display of the heading. |
depth=<n> | Display headings of subsequent pages to a maximum depth of <n>. |
inline | Display TOC inline rather than as a side-bar. |
sectionindex | Only display the page name and title of each page in the wiki section. |
titleindex | Only display the page name and title of each page, similar to TitleIndex. |
notitle | Supress display of page title. |
reverse | Display TOC sorted in reversed order. (Since 11.0.0.4) |
For titleindex argument, an empty pagelist will evaluate to all pages:
[[TOC(titleindex, notitle, heading=All pages)]]
The sectionindex argument allows a title index to be generated for all pages in a given section of the wiki. A section is defined by wiki page name, using / as a section level delimiter (like directories in a file system). Giving / or * as the page name produces the same result as titleindex (title of all pages). If a page name ends with a /, only children of this page will be processed. Otherwise, the page given in the argument is also included, if it exists. For sectionindex argument, an empty pagelist will evaluate to all page below the same parent as the current page:
[[TOC(sectionindex, notitle, heading=This section pages)]]
[[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:
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:
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.
[[TracMetodologia]]
Collates and generates foot-notes. Call the macro with the foot-note content as the only argument:
[[TracMetodologia(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:
[[TracMetodologia(1)]]
In addition, identical foot-notes are coalesced into one entry. The following will generate one footnote entry with two references:
Some text[[TracMetodologia(A footnote)]] and some more text [[TracMetodologia(A footnote)]].
A list of footnotes generated by one or more of the above commands is produced by calling the macro without arguments:
[[TracMetodologia]]
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.
[[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 }}}
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.
Macros, like Trac itself, are written in the ?Python programming language.
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 with Trac 0.11.
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.
It should be saved as TimeStamp.py as Trac will use the module name as the Macro name
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, args): t = datetime.now(utc) return tag.b(format_datetime(t, '%c'))
It should be saved as HelloWorld.py (in the plugins/ directory) as Trac will use the module name as the Macro name
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, 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'`), `args` 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 `args` is `None`. """ return 'Hello World, args = ' + unicode(args) # Note that there's no need to HTML escape the returned data, # as the template engine (Genshi) will do it for us.
expand_macro should return either a simple Python string which will be interpreted as HTML, or preferably a Markup object (use from trac.util.html import Markup). Markup(string) just annotates the string so the renderer will render the HTML string as-is with no escaping. You will also need to import Formatter using from trac.wiki import Formatter.
If your macro creates wiki markup instead of HTML, you can convert it to HTML like this:
text = "whatever wiki markup you want, even containing other macros" # Convert Wiki markup to HTML, new style out = StringIO() Formatter(self.env, formatter.context).format(text, out) return Markup(out.getvalue())