MediaWiki  1.27.2
DifferenceEngine Class Reference
Inheritance diagram for DifferenceEngine:
Collaboration diagram for DifferenceEngine:

Public Member Functions

 __construct ($context=null, $old=0, $new=0, $rcid=0, $refreshCache=false, $unhide=false)
 #@- More...
 
 addHeader ($diff, $otitle, $ntitle, $multi= '', $notice= '')
 Add the header to a diff body. More...
 
 deletedIdMarker ($id)
 Build a wikitext link toward a deleted revision, if viewable. More...
 
 deletedLink ($id)
 Look up a special:Undelete link to the given deleted revision id, as a workaround for being unable to load deleted diffs in currently. More...
 
 generateContentDiffBody (Content $old, Content $new)
 Generate a diff, no caching. More...
 
 generateDiffBody ($otext, $ntext)
 Generate a diff, no caching. More...
 
 generateTextDiffBody ($otext, $ntext)
 Generate a diff, no caching. More...
 
 getDiff ($otitle, $ntitle, $notice= '')
 Get complete diff table, including header. More...
 
 getDiffBody ()
 Get the diff table body, without header. More...
 
 getDiffLang ()
 
 getMultiNotice ()
 If there are revisions between the ones being compared, return a note saying so. More...
 
 getNewid ()
 
 getOldid ()
 
 loadNewText ()
 Load the text of the new revision, not the old one. More...
 
 loadRevisionData ()
 Load revision metadata for the specified articles. More...
 
 loadText ()
 Load the text of the revisions, as well as revision data. More...
 
 localiseLineNumbers ($text)
 Replace line numbers with the text in the user's language. More...
 
 localiseLineNumbersCb ($matches)
 
 mapDiffPrevNext ($old, $new)
 Maps a revision pair definition as accepted by DifferenceEngine constructor to a pair of actual integers representing revision ids. More...
 
 renderNewRevision ()
 Show the new revision of the page. More...
 
 setContent (Content $oldContent, Content $newContent)
 Use specified text instead of loading from the database. More...
 
 setReducedLineNumbers ($value=true)
 
 setTextLanguage ($lang)
 Set the language in which the diff text is written (Defaults to page content language). More...
 
 showDiff ($otitle, $ntitle, $notice= '')
 Get the diff text, send it to the OutputPage object Returns false if the diff could not be generated, otherwise returns true. More...
 
 showDiffPage ($diffOnly=false)
 
 showDiffStyle ()
 Add style sheets and supporting JS for diff display. More...
 
 wasCacheHit ()
 
- Public Member Functions inherited from ContextSource
 canUseWikiPage ()
 Check whether a WikiPage object can be get with getWikiPage(). More...
 
 exportSession ()
 Export the resolved user IP, HTTP headers, user ID, and session ID. More...
 
 getConfig ()
 Get the Config object. More...
 
 getContext ()
 Get the base IContextSource object. More...
 
 getLanguage ()
 Get the Language object. More...
 
 getOutput ()
 Get the OutputPage object. More...
 
 getRequest ()
 Get the WebRequest object. More...
 
 getSkin ()
 Get the Skin object. More...
 
 getStats ()
 Get the Stats object. More...
 
 getTiming ()
 Get the Timing object. More...
 
 getTitle ()
 Get the Title object. More...
 
 getUser ()
 Get the User object. More...
 
 getWikiPage ()
 Get the WikiPage object. More...
 
 msg ()
 Get a Message object with context set Parameters are the same as wfMessage() More...
 
 setContext (IContextSource $context)
 Set the IContextSource object. More...
 

Static Public Member Functions

static intermediateEditsMsg ($numEdits, $numUsers, $limit)
 Get a notice about how many intermediate edits and users there are. More...
 

Public Attributes

 $enableDebugComment = false
 Set this to true to add debug info to the HTML output. More...
 
bool $mCacheHit = false
 Was the diff fetched from cache? More...
 
Content $mNewContent
 
int $mNewid
 
Title $mNewPage
 
Revision $mNewRev
 
Content $mOldContent
 
int $mOldid
 
Title $mOldPage
 
Revision $mOldRev
 
bool $mRevisionsLoaded = false
 Have the revisions been loaded. More...
 
int $mTextLoaded = 0
 How many text blobs have been loaded, 0, 1 or 2? More...
 

Protected Member Functions

 debug ($generator="internal")
 Generate a debug comment indicating diff generating time, server node, and generator backend. More...
 
 getDiffBodyCacheKey ()
 Returns the cache key for diff body text or content. More...
 
 getMarkPatrolledLinkInfo ()
 Returns an array of meta data needed to build a "mark as patrolled" link and adds the mediawiki.page.patrol.ajax to the output. More...
 
 getParserOutput (WikiPage $page, Revision $rev)
 
 getRevisionHeader (Revision $rev, $complete= '')
 Get a header for a specified revision. More...
 
 markPatrolledLink ()
 Build a link to mark a change as patrolled. More...
 
 revisionDeleteLink ($rev)
 
 textDiff ($otext, $ntext)
 Generates diff, to be wrapped internally in a logging/instrumentation. More...
 

Protected Attributes

Language $mDiffLang
 
string $mMarkPatrolledLink = null
 Link to action=markpatrolled. More...
 
bool $mReducedLineNumbers = false
 If true, line X is not displayed when X is 1, for example to increase readability and conserve space with many small diffs. More...
 
bool $mRefreshCache = false
 Refresh the diff cache. More...
 
bool $unhide = false
 Show rev_deleted content if allowed. More...
 

Private Member Functions

 loadRevisionIds ()
 Load revision IDs. More...
 
 showMissingRevision ()
 

Private Attributes

 $mNewTags
 
 $mOldTags
 
bool $mRevisionsIdsLoaded = false
 Have the revisions IDs been loaded. More...
 

Detailed Description

Todo:
document

Definition at line 36 of file DifferenceEngine.php.

Constructor & Destructor Documentation

DifferenceEngine::__construct (   $context = null,
  $old = 0,
  $new = 0,
  $rcid = 0,
  $refreshCache = false,
  $unhide = false 
)

#@-

Constructor

Parameters
IContextSource$contextContext to use, anything else will be ignored
int$oldOld ID we want to show and diff with.
string | int$newEither revision ID or 'prev' or 'next'. Default: 0.
int$rcidDeprecated, no longer used!
bool$refreshCacheIf set, refreshes the diff cache
bool$unhideIf set, allow viewing deleted revs

Definition at line 112 of file DifferenceEngine.php.

References ContextSource\$context, $refreshCache, $unhide, ContextSource\setContext(), and wfDebug().

Member Function Documentation

DifferenceEngine::addHeader (   $diff,
  $otitle,
  $ntitle,
  $multi = '',
  $notice = '' 
)

Add the header to a diff body.

Parameters
string$diffDiff body
string$otitleOld revision header
string$ntitleNew revision header
string$multiNotice telling user that there are intermediate revisions between the ones being compared
string$noticeOther notices, e.g. that user is viewing deleted content
Returns
string

Definition at line 1129 of file DifferenceEngine.php.

References getDiffLang(), ContextSource\getLanguage(), and Html\openElement().

Referenced by getDiff(), and showDiffPage().

DifferenceEngine::debug (   $generator = "internal")
protected

Generate a debug comment indicating diff generating time, server node, and generator backend.

Parameters
string$generator: What diff engine was used
Returns
string

Definition at line 955 of file DifferenceEngine.php.

References $generator, global, TS_DB, wfHostname(), and wfTimestamp().

Referenced by textDiff().

DifferenceEngine::deletedIdMarker (   $id)

Build a wikitext link toward a deleted revision, if viewable.

Parameters
int$idRevision ID
Returns
string Wikitext fragment

Definition at line 206 of file DifferenceEngine.php.

References $link, and deletedLink().

Referenced by showMissingRevision().

DifferenceEngine::deletedLink (   $id)

Look up a special:Undelete link to the given deleted revision id, as a workaround for being unable to load deleted diffs in currently.

Parameters
int$idRevision ID
Returns
mixed URL or false

Definition at line 179 of file DifferenceEngine.php.

References $dbr, $rev, $title, DB_SLAVE, SpecialPage\getTitleFor(), ContextSource\getUser(), Title\makeTitleSafe(), Revision\newFromArchiveRow(), and wfGetDB().

Referenced by deletedIdMarker().

DifferenceEngine::generateContentDiffBody ( Content  $old,
Content  $new 
)

Generate a diff, no caching.

This implementation uses generateTextDiffBody() to generate a diff based on the default serialization of the given Content objects. This will fail if $old or $new are not instances of TextContent.

Subclasses may override this to provide a different rendering for the diff, perhaps taking advantage of the content's native form. This is required for all content models that are not text based.

Since
1.21
Parameters
Content$oldOld content
Content$newNew content
Exceptions
MWExceptionIf old or new content is not an instance of TextContent.
Returns
bool|string

Definition at line 803 of file DifferenceEngine.php.

References generateTextDiffBody(), and Content\serialize().

Referenced by getDiffBody().

DifferenceEngine::generateDiffBody (   $otext,
  $ntext 
)

Generate a diff, no caching.

Parameters
string$otextOld text, must be already segmented
string$ntextNew text, must be already segmented
Returns
bool|string
Deprecated:
since 1.21, use generateContentDiffBody() instead!

Definition at line 829 of file DifferenceEngine.php.

References ContentHandler\deprecated(), and generateTextDiffBody().

DifferenceEngine::generateTextDiffBody (   $otext,
  $ntext 
)

Generate a diff, no caching.

Todo:
move this to TextDifferenceEngine, make DifferenceEngine abstract. At some point.
Parameters
string$otextOld text, must be already segmented
string$ntextNew text, must be already segmented
Returns
bool|string

Definition at line 845 of file DifferenceEngine.php.

References $status, $time, ContextSource\getStats(), textDiff(), use, and wfDebugLog().

Referenced by generateContentDiffBody(), and generateDiffBody().

DifferenceEngine::getDiff (   $otitle,
  $ntitle,
  $notice = '' 
)

Get complete diff table, including header.

Parameters
string | bool$otitleHeader for old text or false
string | bool$ntitleHeader for new text or false
string$noticeHTML between diff header and body
Returns
mixed

Definition at line 681 of file DifferenceEngine.php.

References addHeader(), getDiffBody(), getMultiNotice(), and ContextSource\msg().

Referenced by showDiff().

DifferenceEngine::getDiffBody ( )

Get the diff table body, without header.

Returns
mixed (string/false)

Definition at line 703 of file DifferenceEngine.php.

References $cache, $key, Revision\DELETED_TEXT, generateContentDiffBody(), getDiffBodyCacheKey(), ObjectCache\getMainWANInstance(), loadRevisionData(), loadText(), localiseLineNumbers(), Hooks\run(), and wfIncrStats().

Referenced by getDiff().

DifferenceEngine::getDiffBodyCacheKey ( )
protected

Returns the cache key for diff body text or content.

Since
1.23
Exceptions
MWException
Returns
string

Definition at line 775 of file DifferenceEngine.php.

References MW_DIFF_VERSION, and wfMemcKey().

Referenced by getDiffBody().

DifferenceEngine::getDiffLang ( )
Returns
Language

Definition at line 137 of file DifferenceEngine.php.

References $mDiffLang, and ContextSource\getTitle().

Referenced by addHeader().

DifferenceEngine::getMarkPatrolledLinkInfo ( )
protected

Returns an array of meta data needed to build a "mark as patrolled" link and adds the mediawiki.page.patrol.ajax to the output.

Returns
array|false An array of meta data for a patrol link (rcid & token) or false if no link is needed

Definition at line 500 of file DifferenceEngine.php.

References $user, DB_SLAVE, ContextSource\getOutput(), ContextSource\getUser(), global, RecentChange\isInRCLifespan(), RecentChange\newFromConds(), and wfGetDB().

Referenced by markPatrolledLink().

DifferenceEngine::getMultiNotice ( )

If there are revisions between the ones being compared, return a note saying so.

Returns
string

Definition at line 999 of file DifferenceEngine.php.

References $limit, $mNewRev, $mOldRev, and Revision\RAW.

Referenced by getDiff(), and showDiffPage().

DifferenceEngine::getNewid ( )
Returns
bool|int

Definition at line 165 of file DifferenceEngine.php.

References $mNewid, and loadRevisionIds().

DifferenceEngine::getOldid ( )
Returns
int

Definition at line 156 of file DifferenceEngine.php.

References $mOldid, and loadRevisionIds().

DifferenceEngine::getRevisionHeader ( Revision  $rev,
  $complete = '' 
)
protected

Get a header for a specified revision.

Parameters
Revision$rev
string$complete'complete' to get the header wrapped depending the visibility of the revision and a link to edit the page.
Returns
string HTML fragment

Definition at line 1064 of file DifferenceEngine.php.

References $key, $lang, $timestamp, $title, $user, Revision\DELETED_TEXT, Revision\getId(), ContextSource\getLanguage(), Revision\getTimestamp(), Revision\getTitle(), ContextSource\getUser(), Revision\isCurrent(), Revision\isDeleted(), Linker\linkKnown(), ContextSource\msg(), Html\rawElement(), and Revision\userCan().

Referenced by renderNewRevision(), and showDiffPage().

static DifferenceEngine::intermediateEditsMsg (   $numEdits,
  $numUsers,
  $limit 
)
static

Get a notice about how many intermediate edits and users there are.

Parameters
int$numEdits
int$numUsers
int$limit
Returns
string

Definition at line 1042 of file DifferenceEngine.php.

References $limit, and wfMessage().

DifferenceEngine::loadNewText ( )

Load the text of the new revision, not the old one.

Returns
bool

Definition at line 1382 of file DifferenceEngine.php.

References Revision\FOR_THIS_USER, ContextSource\getUser(), and loadRevisionData().

Referenced by renderNewRevision().

DifferenceEngine::loadRevisionData ( )

Load revision metadata for the specified articles.

If newid is 0, then compare the old article in oldid to the current article; if oldid is 0, then compare the current article to the immediately previous one (ignoring the value of newid).

If oldid is false, leave the corresponding revision object set to false. This is impossible via ordinary user input, and is provided for API convenience.

Returns
bool

Definition at line 1268 of file DifferenceEngine.php.

References $dbr, $rev, DB_SLAVE, ContextSource\getTitle(), loadRevisionIds(), Revision\newFromId(), Revision\newFromTitle(), IDBAccessObject\READ_NORMAL, and wfGetDB().

Referenced by getDiffBody(), loadNewText(), loadText(), and showDiffPage().

DifferenceEngine::loadRevisionIds ( )
private

Load revision IDs.

Definition at line 1233 of file DifferenceEngine.php.

References $mNewid, $mOldid, ContextSource\getTitle(), list, and Hooks\run().

Referenced by getNewid(), getOldid(), and loadRevisionData().

DifferenceEngine::loadText ( )

Load the text of the revisions, as well as revision data.

Returns
bool

Definition at line 1348 of file DifferenceEngine.php.

References Revision\FOR_THIS_USER, ContextSource\getUser(), and loadRevisionData().

Referenced by getDiffBody().

DifferenceEngine::localiseLineNumbers (   $text)

Replace line numbers with the text in the user's language.

Parameters
string$text
Returns
mixed

Definition at line 978 of file DifferenceEngine.php.

Referenced by getDiffBody().

DifferenceEngine::localiseLineNumbersCb (   $matches)

Definition at line 986 of file DifferenceEngine.php.

References $matches, and ContextSource\msg().

DifferenceEngine::mapDiffPrevNext (   $old,
  $new 
)

Maps a revision pair definition as accepted by DifferenceEngine constructor to a pair of actual integers representing revision ids.

Parameters
int$oldRevision id, e.g. from URL parameter 'oldid'
int | string$newRevision id or strings 'next' or 'prev', e.g. from URL parameter 'diff'
Returns
int[] List of two revision ids, older first, later second. Zero signifies invalid argument passed. false signifies that there is no previous/next revision ($old is the oldest/newest one).

Definition at line 1213 of file DifferenceEngine.php.

References ContextSource\getTitle().

DifferenceEngine::markPatrolledLink ( )
protected

Build a link to mark a change as patrolled.

Returns empty string if there's either no revision to patrol or the user is not allowed to. Side effect: When the patrol link is build, this method will call OutputPage::preventClickjacking() and load mediawiki.page.patrol.ajax.

Returns
string HTML or empty string

Definition at line 470 of file DifferenceEngine.php.

References $mMarkPatrolledLink, getMarkPatrolledLinkInfo(), Linker\linkKnown(), and ContextSource\msg().

Referenced by renderNewRevision(), and showDiffPage().

DifferenceEngine::revisionDeleteLink (   $rev)
protected
Parameters
Revision$rev
Returns
string

Definition at line 557 of file DifferenceEngine.php.

References $link, $rev, Linker\getRevDeleteLink(), and ContextSource\getUser().

Referenced by showDiffPage().

DifferenceEngine::setContent ( Content  $oldContent,
Content  $newContent 
)

Use specified text instead of loading from the database.

Parameters
Content$oldContent
Content$newContent
Since
1.21

Definition at line 1184 of file DifferenceEngine.php.

DifferenceEngine::setReducedLineNumbers (   $value = true)
Parameters
bool$value

Definition at line 130 of file DifferenceEngine.php.

References $value.

DifferenceEngine::setTextLanguage (   $lang)

Set the language in which the diff text is written (Defaults to page content language).

Parameters
Language | string$lang
Since
1.19

Definition at line 1198 of file DifferenceEngine.php.

References $lang, and wfGetLangObj().

DifferenceEngine::showDiff (   $otitle,
  $ntitle,
  $notice = '' 
)

Get the diff text, send it to the OutputPage object Returns false if the diff could not be generated, otherwise returns true.

Parameters
string | bool$otitleHeader for old text or false
string | bool$ntitleHeader for new text or false
string$noticeHTML between diff header and body
Returns
bool

Definition at line 651 of file DifferenceEngine.php.

References getDiff(), ContextSource\getOutput(), showDiffStyle(), and showMissingRevision().

Referenced by showDiffPage().

DifferenceEngine::showDiffStyle ( )

Add style sheets and supporting JS for diff display.

Definition at line 668 of file DifferenceEngine.php.

References ContextSource\getOutput().

Referenced by showDiff(), and showDiffPage().

DifferenceEngine::showMissingRevision ( )
private
DifferenceEngine::textDiff (   $otext,
  $ntext 
)
protected

Generates diff, to be wrapped internally in a logging/instrumentation.

Parameters
string$otextOld text, must be already segmented
string$ntextNew text, must be already segmented
Returns
bool|string

Definition at line 885 of file DifferenceEngine.php.

References $wgContLang, debug(), global, wfDeprecated(), wfEscapeShellArg(), wfShellExec(), wfTempDir(), and wfWarn().

Referenced by generateTextDiffBody().

DifferenceEngine::wasCacheHit ( )
Returns
bool

Definition at line 149 of file DifferenceEngine.php.

References $mCacheHit.

Member Data Documentation

DifferenceEngine::$enableDebugComment = false

Set this to true to add debug info to the HTML output.

Warning: this may cause RSS readers to spuriously mark articles as "new" (bug 20601)

Definition at line 85 of file DifferenceEngine.php.

bool DifferenceEngine::$mCacheHit = false

Was the diff fetched from cache?

Definition at line 78 of file DifferenceEngine.php.

Referenced by wasCacheHit().

Language DifferenceEngine::$mDiffLang
protected

Definition at line 54 of file DifferenceEngine.php.

Referenced by getDiffLang().

string DifferenceEngine::$mMarkPatrolledLink = null
protected

Link to action=markpatrolled.

Definition at line 93 of file DifferenceEngine.php.

Referenced by markPatrolledLink().

Content DifferenceEngine::$mNewContent

Definition at line 51 of file DifferenceEngine.php.

int DifferenceEngine::$mNewid

Definition at line 42 of file DifferenceEngine.php.

Referenced by getNewid(), and loadRevisionIds().

Title DifferenceEngine::$mNewPage

Definition at line 60 of file DifferenceEngine.php.

Revision DifferenceEngine::$mNewRev

Definition at line 66 of file DifferenceEngine.php.

Referenced by getMultiNotice().

DifferenceEngine::$mNewTags
private

Definition at line 45 of file DifferenceEngine.php.

Content DifferenceEngine::$mOldContent

Definition at line 48 of file DifferenceEngine.php.

int DifferenceEngine::$mOldid

Definition at line 39 of file DifferenceEngine.php.

Referenced by getOldid(), and loadRevisionIds().

Title DifferenceEngine::$mOldPage

Definition at line 57 of file DifferenceEngine.php.

Revision DifferenceEngine::$mOldRev

Definition at line 63 of file DifferenceEngine.php.

Referenced by getMultiNotice().

DifferenceEngine::$mOldTags
private

Definition at line 44 of file DifferenceEngine.php.

bool DifferenceEngine::$mReducedLineNumbers = false
protected

If true, line X is not displayed when X is 1, for example to increase readability and conserve space with many small diffs.

Definition at line 90 of file DifferenceEngine.php.

bool DifferenceEngine::$mRefreshCache = false
protected

Refresh the diff cache.

Definition at line 99 of file DifferenceEngine.php.

bool DifferenceEngine::$mRevisionsIdsLoaded = false
private

Have the revisions IDs been loaded.

Definition at line 69 of file DifferenceEngine.php.

bool DifferenceEngine::$mRevisionsLoaded = false

Have the revisions been loaded.

Definition at line 72 of file DifferenceEngine.php.

int DifferenceEngine::$mTextLoaded = 0

How many text blobs have been loaded, 0, 1 or 2?

Definition at line 75 of file DifferenceEngine.php.

bool DifferenceEngine::$unhide = false
protected

Show rev_deleted content if allowed.

Definition at line 96 of file DifferenceEngine.php.

Referenced by __construct().


The documentation for this class was generated from the following file: