Comment Plugin
This plugin allows users to quickly post comments to a page without an edit/preview/save cycle.
WARNING: TWiki-4 only. If you want to use this plugin with an earlier version of TWiki, please see here
Features
Inserts an edit box into the page that allows users to type in and save comments. Comments can be made
- in different formats (as defined by a template),
- in both forward and reverse chronological order,
- signed or unsigned, dated or undated (as defined by a template),
- in other topics, or other positions within the current topic.
Syntax Rules
Write the command
%COMMENT{
attributes }%
anywhere in a TWiki topic. %COMMENT% is also legal.
The following attributes are
recognised
Name |
Description |
type |
This is the name of the template to use for this comment. Comment templates are defined in a TWiki template - see Customisation, below. If this attribute is not defined, the type is whatever is defined by COMMENTPLUGIN_DEFAULT_TYPE, either in this topic or in your WebPreferences. By default this is 'below'. |
target |
Name of the topic to add the comment to. Defaults to the current topic. |
location |
Regular expression specifying the comment location in the target topic. Read carefully below! |
mode |
For compatability with older versions only, synonymous with type |
nonotify |
Set to "on" to disable change notification for target topics |
noform |
Set to "on" to disable the automatic form that encloses your comment block - remember to insert <FORM> tags yourself! |
Positioning the comment
%COMMENT
supports several ways to specify
where a comment should be inserted in the target topic. This is referred to as the
location of the comment.
Location relative to %COMMENT
tag
The default
location is the
%COMMENT
tag itself. For example:
%COMMENT{type="below"}%
will add comments in the current topic, directly below the
%COMMENT
tag.
Location relative to a TWiki anchor
The
target
attribute may specify a web, and may also specify an anchor within the target topic; for example,
%COMMENT{type="above" target="%MAINWEB%.PersonalRemarks#InsertHere"}%
This uses a standard TWiki in-topic anchor as the insertion location. See
TextFormattingRules for more about TWiki anchors.
Location relative to an arbitrary text string
Getting more sophisticated, you can also specify a regular expression for the target location using the
location
parameter. The target topic is searched for the regular expression, and the comment inserted relative to the string that the search matched. For example,
%COMMENT{type="above" location="Flights of Fancy"}%
will place comments above the first occurence of the string
Flights of Fancy
in the current topic.
Warning of course, if a user's comment contains the string "Flights of Fancy" they may and up
changing the location for the next comment! Also, if you use a tag in the location, then you've just inserted another tag in the page that contains the
%COMMENT
! So be very careful how you specify the RE for
location
. Note that the RE is matched using perl "multiple line" mode, so ^ and $ match the start of a line and the end of a line respectively.
I look forward to someone leveraging this feature to create - for example - threaded conversations using
%COMMENT
.
If you specify an anchor
and a
location
, the anchor will be ignored.
Default templates
Templates are used to define the "comment style" i.e. how comments appear in the page. The default is to add comments in "Blog like" style using bulleted lists, with the most recent comment at the top, but many other styles are available such as tables or Wiki thread mode comments. It is easy to define your own customer styles as well.
A set of default comment templates are shipped with the plugin. These are:
Template type |
Description |
top |
Comments, signed and dated (server time), added at top of the topic (the anchor is ignored) |
bottom |
Comments, signed and dated (server time), added at end of the target topic (the anchor is ignored) |
above |
Comments, signed and dated (server time), added immediately before the target anchor, or the %COMMENT if no anchor is specified |
below |
Comments, signed and dated (server time), added immediately below the target anchor, or the %COMMENT if no anchor is specified |
threadmode |
Wiki thread mode comment, signed and dated (server time) |
tableprepend |
Comments, signed and dated (server time), formatted as an HTML table row, added below the anchor (which must be in an HTML <table>) |
tableappend |
Comments, signed and dated (server time), formatted as an HTML table row, added above the anchor (which must be in an HTML <table>) |
Your local installation may add more template types as well - see
Customisation, below.
Customisation
Customisation of the comment plugin requires
To define a comment type, you have to provide two simple template definitions in the template file; one for the prompt box, and one for the generated output. If we have a template type "mytype", these are named
PROMPT:mytype
and
OUTPUT:mytype
respectively. See
comments.tmpl
in the templates directory for examples.
The plugin picks up these template definitions from a standard TWiki template file,
templates/comments.tmpl
. This allows different templates to be defined for different TWiki skins. By default, this template includes the topic
CommentPluginTemplate, which contains all the shipped standard templates and in turn includes TWiki.UserCommentsTemplate. This allows for several levels of customisation:
- To override all default templates, everywhere, change
comments.tmpl
to include a different topic (this customisation will be lost next time you upgrade, though).
- To add site-wide local template customisations, add them to TWiki.UserCommentsTemplate. You can redefine the standard templates here if you want, and your definitions will override the standard definitions.
- To override templates on a web-by-web basis, add a topic UserCommentsTemplate to the web (this will replace TWiki.UserCommentsTemplate)
- To override templates for a specific skin, add them to TWiki.UserComments<Skin>Template (where <Skin> is the name of the skin with the first letter capitalised, e.g. Pattern)
Templates are picked up by following the
standard TWiki rules for locating template files. Note that you can use
%TMPL:INCLUDE
to include other files of templates.
The PROMPT
template
The
PROMPT
template defines the contents of an HTML form that is used to capture the comment. This form invokes the comment generator when submitted. Parameters to the comment generator are defined using standard HTML input fields, such as
input
,
textarea
and
select
. The user enters values for these parameters, and these are then available when the
OUTPUT
template is expanded, in the form of
%URLPARAM%
s.
Only the input fields of the form need be defined. The plugin automatically generates the
>form<
and
>:/form<
tags, unless you specify
noform="on"
, in which case you have to provide them yourself.
Note that you must define a "submit" button if you want the form to work!
If an attribute is given to the
%COMMENT
tag that is not one of the
standard attributes, then that attribute is taken as the name of a parameter to be expanded in the
PROMPT
template. Expressions in the template of the form
%
param|
default%
(e.g.
%rows|3%
,
%button|Push me%
) are expanded to the values given in the
%COMMENT
. For example, if the
PROMPT
template 'example' contains:
<textarea rows=%rows|3% cols="%cols|50%" value="%tval|Rubbish%">
and the %COMMENT tag is:
%COMMENT{type="example" cols="75"}%
then the template will be expanded as
<textarea rows="3" cols="75" value="Rubbish">
As well as support for all the usual TWiki variables in templates, the following special variables are supported in the
PROMPT
definition:
Variable |
Description |
%MESSAGE% |
A helpful generated message, either a lock message or a reminder to refresh. |
%DISABLED% |
Set to 'disabled' when you cannot comment (e.g. in preview mode). |
The OUTPUT
template
The
OUTPUT
template defines the format for the text that actually gets embedded into the topic. All the usual TWiki variables are available in the
PROMPT
definition, but note that they get expanded
when the comment is inserted in the text, so time, date and username will refer to the time and date when the comment was made and the user who made it.
There are also four position tags that are used to indicate where the comment should be placed, relative to the
location
defined in the
%COMMENT
tag:
%POS:TOP% |
If present, comments will be inserted at the top of the topic i.e. before any other text |
%POS:BOTTOM% |
If present, comments will be inserted at the end of the topic i.e. after all existing text |
%POS:BEFORE% |
If present, comments will be inserted immediately before the %COMMENT% tag |
%POS:AFTER% |
If present, comments will be inserted immediately after the %COMMENT% tag |
Note that these position tags are obviously mutually exclusive. If you define more than one, the result is undefined. If none is present, the default is taken from the plugin setting
DEFAULT_TYPE
All the usual
TWikiVariables that can be used in a topic template can also be used in an
OUTPUT
template. See
TWikiVariables for details.
Settings
- Description:
- Set SHORTDESCRIPTION = Allows users to quickly post comments to a page without an edit/preview/save cycle.
- Name of file in the 'templates' directory that contains the comment templates. The default 'comments.tmpl' automatically includes user templates from CommentsTmpl?
- default template type (if not present, defaults to "below")
Plugin Installation Instructions
- This plugin is pre-installed in most TWiki releases. However if you need to upgrade the plugin for any reason:
- Download the archive file from the Plugin web (see below)
- Unpack the archive in your twiki installation directory.
- You may need to correct file permissions.
- Run
CommentPlugin_installer
to automatically check and install other modules that this module depends on. You can also do this step manually. Dependencies: None
- Visit
configure
in your TWiki installation, and enable the plugin in the {Plugins} section.
Plugin Info
Plugin Author: |
TWiki:Main.DavidWeller, TWiki:Main.PeterMasiar, TWiki:Main.CrawfordCurrie http://www.c-dot.co.uk |
Change History: |
|
8788 |
Item1465 Item1577: reverted 8433 to fix inclusion of correct user templates |
8787 |
Item1573 renamed standard templates topic to avoid naming clash on Windows, where filenames are case-insensitive |
8433 |
Item1465 Fix 'TWiki.' to '%TWIKIEB%.'; also fixed include 'UserComments' to 'UserCommentsTemplate' (at least that is what the doc suggests) |
7427 |
Item845 removed duplicate date in default comments; stick with server time |
7251 |
Item810 fix for user template inclusion; reorganised templates to make customisation easier |
5906 |
Item143 apache warning from comment plugin when CommentsTmpl? .txt not foudn |
5519 |
CommentPluginOnAnchorsBroken? : incorporated JacobEisinger? 's fix |
5518 |
CommentPluginOnAnchorsBroken? : incorporated OlivierBerger? 's fix |
5455 |
On Niels Kodslo's prompting, removed the global recursion prevention that I believe is no longer needed. |
5280 |
Removed templates, and some minor fixes |
5250 |
Removed newlines from prompt box |
4902 |
Changed to use viewauth. Moved templates into user topics. |
4901 |
Added templates in user webs support |
4897 |
Fixes for disabling during preview; re-enabled old legacy parameters |
4889 |
Chopped down from PeterMasiar? version, removing several parameters, savecomment script, changing way templates are done. Major rewrite, atcherly. |
4882 |
Update from PeterMasiar? 's 2.0 version, plus documentation and small code improvements. |
4745 |
06Mar 2002 initial commit |
Perl Version: |
>= 5.6.1 |
Plugin Home: |
TWiki:Plugins/CommentPlugin |
Feedback: |
TWiki:Plugins/CommentPluginDev |
Related Topics: TWikiPreferences,
TWikiPlugins
--
TWiki:Main/CrawfordCurrie - 21:44:41 31 March 2006