internal package Foswiki::Plugins::DebugLogPlugin

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See also Developing plugins, Developer's Bible, Technical Overview

internal package Foswiki::Plugins::DebugLogPlugin

To interact with Foswiki use ONLY the official API functions in the Foswiki::Func module. Do not reference any functions or variables elsewhere in Foswiki, as these are subject to change without prior warning, and your plugin may suddenly stop working.

For increased performance, all handlers except initPlugin are disabled below. To enable a handler remove the leading DISABLE_ from the function name. For efficiency and clarity, you should comment out or delete the whole of handlers you don't use before you release your plugin.

NOTE: When developing a plugin it is important to remember that Foswiki is tolerant of plugins that do not compile. In this case, the failure will be silent but the plugin will not be available. See InstalledPlugins for error messages.

NOTE: Defining deprecated handlers will cause the handlers to be listed in %SYSTEMWEBWEB%.InstalledPlugins#FAILEDPLUGINS. See InstalledPlugins for information on regarding deprecated handlers that are defined for compatibility with older Foswiki versions.

NOTE: When writing handlers, keep in mind that these may be invoked on included topics. For example, if a plugin generates links to the current topic, these need to be generated before the afterCommonTagsHandler is run, as at that point in the rendering loop we have lost the information that we the text had been included from another topic.

initPlugin($topic, $web, $user, $installWeb) → $boolean

  • $topic - the name of the topic in the current CGI query
  • $web - the name of the web in the current CGI query
  • $user - the login name of the user
  • $installWeb - the name of the web the plugin is installed in

REQUIRED

Called to initialise the plugin. If everything is OK, should return a non-zero value. On non-fatal failure, should write a message using Foswiki::Func::writeWarning and return 0. In this case
PluginErrors
TWikiCompatibilityPlugin
none
SpreadSheetPlugin
none
SlideShowPlugin
none
AutoTemplatePlugin
none
AutoViewTemplatePlugin
none
BreadCrumbsPlugin
none
CalDAVPlugin
none
CommentPlugin
none
CompareRevisionsAddonPlugin
none
ConfigurePlugin
none
DBCachePlugin
none
DebugLogPlugin
none
DiffPlugin
none
EditRowPlugin
none
FeedPlugin
none
FilterPlugin
none
FlexFormPlugin
none
FlexWebListPlugin
none
GridLayoutPlugin
none
HistoryPlugin
none
HomePagePlugin
none
ImagePlugin
none
InterwikiPlugin
none
JQueryPlugin
none
LdapNgPlugin
none
ListyPlugin
none
MailerContribPlugin
none
MetaDataPlugin
none
MimeIconPlugin
none
ModifyLoginPlugin
none
MoreFormfieldsPlugin
none
MultiLingualPlugin
none
NatEditPlugin
none
NatSkinPlugin
none
NewUserPlugin
none
PreferencesPlugin
none
RedDotPlugin
none
RedirectPlugin
none
RenderListPlugin
none
RenderPlugin
none
SmiliesPlugin
none
SubscribePlugin
none
TablePlugin
none
TinyMCEPlugin
none
TopicInteractionPlugin
none
TopicTitlePlugin
none
TwistyPlugin
none
UpdatesPlugin
none
VotePlugin
none
WebLinkPlugin
none
WysiwygPlugin
none
HandlerPlugins
afterAttachmentSaveHandlerDBCachePlugin
This handler is deprecated - please check for updated versions of the plugins that use it!
afterUploadHandlerDBCachePlugin
MoreFormfieldsPlugin
TopicInteractionPlugin
afterCommonTagsHandlerTablePlugin
afterEditHandlerMoreFormfieldsPlugin
WysiwygPlugin
afterRenameHandlerDBCachePlugin
FlexWebListPlugin
ImagePlugin
MoreFormfieldsPlugin
TopicTitlePlugin
afterSaveHandlerDBCachePlugin
FlexWebListPlugin
MoreFormfieldsPlugin
beforeCommonTagsHandlerNewUserPlugin
PreferencesPlugin
WysiwygPlugin
beforeEditHandlerMoreFormfieldsPlugin
NatEditPlugin
TinyMCEPlugin
WysiwygPlugin
beforeMergeHandlerWysiwygPlugin
beforeSaveHandlerImagePlugin
MetaDataPlugin
MoreFormfieldsPlugin
MultiLingualPlugin
TopicTitlePlugin
WysiwygPlugin
beforeUploadHandlerTopicInteractionPlugin
commonTagsHandlerSpreadSheetPlugin
SlideShowPlugin
CompareRevisionsAddonPlugin
DiffPlugin
EditRowPlugin
FilterPlugin
ImagePlugin
completePageHandlerFlexFormPlugin
NatSkinPlugin
earlyInitPluginTWikiCompatibilityPlugin
MetaDataPlugin
endRenderingHandlerNatSkinPlugin
This handler is deprecated - please check for updated versions of the plugins that use it!
finishPluginAutoTemplatePlugin
BreadCrumbsPlugin
DBCachePlugin
DiffPlugin
FeedPlugin
FlexFormPlugin
FlexWebListPlugin
GridLayoutPlugin
ImagePlugin
JQueryPlugin
LdapNgPlugin
ListyPlugin
MetaDataPlugin
MimeIconPlugin
MoreFormfieldsPlugin
MultiLingualPlugin
NatSkinPlugin
RenderPlugin
TopicInteractionPlugin
TopicTitlePlugin
UpdatesPlugin
WebLinkPlugin
initPluginTWikiCompatibilityPlugin
SpreadSheetPlugin
SlideShowPlugin
AutoTemplatePlugin
AutoViewTemplatePlugin
BreadCrumbsPlugin
CalDAVPlugin
CommentPlugin
CompareRevisionsAddonPlugin
ConfigurePlugin
DBCachePlugin
DebugLogPlugin
DiffPlugin
EditRowPlugin
FeedPlugin
FilterPlugin
FlexFormPlugin
FlexWebListPlugin
GridLayoutPlugin
HistoryPlugin
HomePagePlugin
ImagePlugin
InterwikiPlugin
JQueryPlugin
LdapNgPlugin
ListyPlugin
MailerContribPlugin
MetaDataPlugin
MimeIconPlugin
ModifyLoginPlugin
MoreFormfieldsPlugin
MultiLingualPlugin
NatEditPlugin
NatSkinPlugin
NewUserPlugin
PreferencesPlugin
RedDotPlugin
RedirectPlugin
RenderListPlugin
RenderPlugin
SmiliesPlugin
SubscribePlugin
TablePlugin
TinyMCEPlugin
TopicInteractionPlugin
TopicTitlePlugin
TwistyPlugin
UpdatesPlugin
VotePlugin
WebLinkPlugin
WysiwygPlugin
initializeUserHandlerHomePagePlugin
ModifyLoginPlugin
modifyHeaderHandlerRenderPlugin
WysiwygPlugin
mergeHandlerDebugLogPlugin
postRenderingHandlerEditRowPlugin
PreferencesPlugin
WysiwygPlugin
preRenderingHandlerInterwikiPlugin
RenderListPlugin
SmiliesPlugin
TablePlugin
renderWikiWordHandlerTWikiCompatibilityPlugin
TopicTitlePlugin
51 plugins

will indicate which plugins failed.

In the case of a catastrophic failure that will prevent the whole installation from working safely, this handler may use 'die', which will be trapped and reported in the browser.

You may also call Foswiki::Func::registerTagHandler here to register a function to handle variables that have standard Foswiki syntax - for example, =%MYTAG{"my param" myarg="My Arg"}%. You can also override internal Foswiki variable handling functions this way, though this practice is unsupported and highly dangerous!

Note: Please align variables names with the Plugin name, e.g. if your Plugin is called FooBarPlugin, name variables FOOBAR and/or FOOBARSOMETHING. This avoids namespace issues.

mergeHandler( $diff, $old, $new, \%info ) → $text

Try to resolve a difference encountered during merge. The differences array is an array of hash references, where each hash contains the following fields:
  • $diff => one of the characters '+', '-', 'c' or ' '.
    • '+' - new contains text inserted in the new version
    • '-' - old contains text deleted from the old version
    • 'c' - old contains text from the old version, and new text from the version being saved
    • ' ' - new contains text common to both versions, or the change only involved whitespace
  • $old => text from version currently saved
  • $new => text from version being saved
  • \%info is a reference to the form field description { name, title, type, size, value, tooltip, attributes, referenced }. It must not be wrtten to. This parameter will be undef when merging the body text of the topic.

Plugins should try to resolve differences and return the merged text. For example, a radio button field where we have { diff=>'c', old=>'Leafy', new=>'Barky' } might be resolved as 'Treelike'. If the plugin cannot resolve a difference it should return undef.

The merge handler will be called several times during a save; once for each difference that needs resolution.

If any merges are left unresolved after all plugins have been given a chance to intercede, the following algorithm is used to decide how to merge the data:
  1. new is taken for all radio, checkbox and select fields to resolve 'c' conflicts
  2. '+' and '-' text is always included in the the body text and text fields
  3. <del>conflict</del> <ins>markers</ins> are used to mark 'c' merges in text fields

The merge handler is called whenever a topic is saved, and a merge is required to resolve concurrent edits on a topic.

Since: Foswiki::Plugins::VERSION = 1.1

restExample($session) → $text

This is an example of a sub to be called by the rest script. The parameter is:
  • $session - The Foswiki object associated to this session.

Additional parameters can be recovered via de query object in the $session.

For more information, check Foswiki:System.Scripts#rest

Since: Foswiki::Plugins::VERSION 1.1

Topic revision: r1 - 21 Nov 2014, ProjectContributor - This page was cached on 27 May 2023 - 05:09.

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