-<?php\r
-/**\r
- * @defgroup DifferenceEngine DifferenceEngine\r
- */\r
- \r
-/**\r
- * Constant to indicate diff cache compatibility.\r
- * Bump this when changing the diff formatting in a way that\r
- * fixes important bugs or such to force cached diff views to\r
- * clear.\r
- */\r
-define( 'MW_DIFF_VERSION', '1.11a' );\r
-\r
-/**\r
- * @todo document\r
- * @ingroup DifferenceEngine\r
- */\r
-class DifferenceEngine {\r
- /**#@+\r
- * @private\r
- */\r
- var $mOldid, $mNewid, $mTitle;\r
- var $mOldtitle, $mNewtitle, $mPagetitle;\r
- var $mOldtext, $mNewtext;\r
- var $mOldPage, $mNewPage;\r
- var $mRcidMarkPatrolled;\r
- var $mOldRev, $mNewRev;\r
- var $mRevisionsLoaded = false; // Have the revisions been loaded\r
- var $mTextLoaded = 0; // How many text blobs have been loaded, 0, 1 or 2?\r
- var $mCacheHit = false; // Was the diff fetched from cache?\r
- var $htmldiff;\r
-\r
- /**\r
- * Set this to true to add debug info to the HTML output.\r
- * Warning: this may cause RSS readers to spuriously mark articles as "new"\r
- * (bug 20601)\r
- */\r
- var $enableDebugComment = false;\r
-\r
- // If true, line X is not displayed when X is 1, for example to increase\r
- // readability and conserve space with many small diffs.\r
- protected $mReducedLineNumbers = false;\r
-\r
- protected $unhide = false;\r
- /**#@-*/\r
-\r
- /**\r
- * Constructor\r
- * @param $titleObj Title object that the diff is associated with\r
- * @param $old Integer: old ID we want to show and diff with.\r
- * @param $new String: either 'prev' or 'next'.\r
- * @param $rcid Integer: ??? FIXME (default 0)\r
- * @param $refreshCache boolean If set, refreshes the diff cache\r
- * @param $htmldiff boolean If set, output using HTMLDiff instead of raw wikicode diff\r
- * @param $unhide boolean If set, allow viewing deleted revs\r
- */\r
- function __construct( $titleObj = null, $old = 0, $new = 0, $rcid = 0,\r
- $refreshCache = false, $htmldiff = false, $unhide = false )\r
- {\r
- if ( $titleObj ) {\r
- $this->mTitle = $titleObj;\r
- } else {\r
- global $wgTitle;\r
- $this->mTitle = $wgTitle;\r
- }\r
- wfDebug("DifferenceEngine old '$old' new '$new' rcid '$rcid'\n");\r
-\r
- if ( 'prev' === $new ) {\r
- # Show diff between revision $old and the previous one.\r
- # Get previous one from DB.\r
- $this->mNewid = intval($old);\r
- $this->mOldid = $this->mTitle->getPreviousRevisionID( $this->mNewid );\r
- } elseif ( 'next' === $new ) {\r
- # Show diff between revision $old and the next one.\r
- # Get next one from DB.\r
- $this->mOldid = intval($old);\r
- $this->mNewid = $this->mTitle->getNextRevisionID( $this->mOldid );\r
- if ( false === $this->mNewid ) {\r
- # if no result, NewId points to the newest old revision. The only newer\r
- # revision is cur, which is "0".\r
- $this->mNewid = 0;\r
- }\r
- } else {\r
- $this->mOldid = intval($old);\r
- $this->mNewid = intval($new);\r
- wfRunHooks( 'NewDifferenceEngine', array(&$titleObj, &$this->mOldid, &$this->mNewid, $old, $new) ); \r
- }\r
- $this->mRcidMarkPatrolled = intval($rcid); # force it to be an integer\r
- $this->mRefreshCache = $refreshCache;\r
- $this->htmldiff = $htmldiff;\r
- $this->unhide = $unhide;\r
- }\r
-\r
- function setReducedLineNumbers( $value = true ) {\r
- $this->mReducedLineNumbers = $value;\r
- }\r
-\r
- function getTitle() {\r
- return $this->mTitle;\r
- }\r
- \r
- function wasCacheHit() {\r
- return $this->mCacheHit;\r
- }\r
- \r
- function getOldid() {\r
- return $this->mOldid;\r
- }\r
- \r
- function getNewid() {\r
- return $this->mNewid;\r
- }\r
-\r
- function showDiffPage( $diffOnly = false ) {\r
- global $wgUser, $wgOut, $wgUseExternalEditor, $wgUseRCPatrol, $wgEnableHtmlDiff;\r
- wfProfileIn( __METHOD__ );\r
-\r
-\r
- # If external diffs are enabled both globally and for the user,\r
- # we'll use the application/x-external-editor interface to call\r
- # an external diff tool like kompare, kdiff3, etc.\r
- if($wgUseExternalEditor && $wgUser->getOption('externaldiff')) {\r
- global $wgInputEncoding,$wgServer,$wgScript,$wgLang;\r
- $wgOut->disable();\r
- header ( "Content-type: application/x-external-editor; charset=".$wgInputEncoding );\r
- $url1=$this->mTitle->getFullURL( array(\r
- 'action' => 'raw',\r
- 'oldid' => $this->mOldid\r
- ) );\r
- $url2=$this->mTitle->getFullURL( array(\r
- 'action' => 'raw',\r
- 'oldid' => $this->mNewid\r
- ) );\r
- $special=$wgLang->getNsText(NS_SPECIAL);\r
- $control=<<<CONTROL\r
- [Process]\r
- Type=Diff text\r
- Engine=MediaWiki\r
- Script={$wgServer}{$wgScript}\r
- Special namespace={$special}\r
-\r
- [File]\r
- Extension=wiki\r
- URL=$url1\r
-\r
- [File 2]\r
- Extension=wiki\r
- URL=$url2\r
-CONTROL;\r
- echo($control);\r
- return;\r
- }\r
-\r
- $wgOut->setArticleFlag( false );\r
- if ( !$this->loadRevisionData() ) {\r
- $t = $this->mTitle->getPrefixedText();\r
- $d = wfMsgExt( 'missingarticle-diff', array( 'escape' ), $this->mOldid, $this->mNewid );\r
- $wgOut->setPagetitle( wfMsg( 'errorpagetitle' ) );\r
- $wgOut->addWikiMsg( 'missing-article', "<nowiki>$t</nowiki>", $d );\r
- wfProfileOut( __METHOD__ );\r
- return;\r
- }\r
-\r
- wfRunHooks( 'DiffViewHeader', array( $this, $this->mOldRev, $this->mNewRev ) );\r
-\r
- if ( $this->mNewRev->isCurrent() ) {\r
- $wgOut->setArticleFlag( true );\r
- }\r
-\r
- # mOldid is false if the difference engine is called with a "vague" query for\r
- # a diff between a version V and its previous version V' AND the version V\r
- # is the first version of that article. In that case, V' does not exist.\r
- if ( $this->mOldid === false ) {\r
- $this->showFirstRevision();\r
- $this->renderNewRevision(); // should we respect $diffOnly here or not?\r
- wfProfileOut( __METHOD__ );\r
- return;\r
- }\r
-\r
- $wgOut->suppressQuickbar();\r
-\r
- $oldTitle = $this->mOldPage->getPrefixedText();\r
- $newTitle = $this->mNewPage->getPrefixedText();\r
- if( $oldTitle == $newTitle ) {\r
- $wgOut->setPageTitle( $newTitle );\r
- } else {\r
- $wgOut->setPageTitle( $oldTitle . ', ' . $newTitle );\r
- }\r
- $wgOut->setSubtitle( wfMsgExt( 'difference', array( 'parseinline' ) ) );\r
- $wgOut->setRobotPolicy( 'noindex,nofollow' );\r
-\r
- if ( !$this->mOldPage->userCanRead() || !$this->mNewPage->userCanRead() ) {\r
- $wgOut->loginToUse();\r
- $wgOut->output();\r
- $wgOut->disable();\r
- wfProfileOut( __METHOD__ );\r
- return;\r
- }\r
-\r
- $sk = $wgUser->getSkin();\r
-\r
- // Check if page is editable\r
- $editable = $this->mNewRev->getTitle()->userCan( 'edit' );\r
- if ( $editable && $this->mNewRev->isCurrent() && $wgUser->isAllowed( 'rollback' ) ) {\r
- $rollback = ' ' . $sk->generateRollback( $this->mNewRev );\r
- } else {\r
- $rollback = '';\r
- }\r
-\r
- // Prepare a change patrol link, if applicable\r
- if( $wgUseRCPatrol && $this->mTitle->userCan('patrol') ) {\r
- // If we've been given an explicit change identifier, use it; saves time\r
- if( $this->mRcidMarkPatrolled ) {\r
- $rcid = $this->mRcidMarkPatrolled;\r
- $rc = RecentChange::newFromId( $rcid );\r
- // Already patrolled?\r
- $rcid = is_object($rc) && !$rc->getAttribute('rc_patrolled') ? $rcid : 0;\r
- } else {\r
- // Look for an unpatrolled change corresponding to this diff\r
- $db = wfGetDB( DB_SLAVE );\r
- $change = RecentChange::newFromConds(\r
- array(\r
- // Redundant user,timestamp condition so we can use the existing index\r
- 'rc_user_text' => $this->mNewRev->getRawUserText(),\r
- 'rc_timestamp' => $db->timestamp( $this->mNewRev->getTimestamp() ),\r
- 'rc_this_oldid' => $this->mNewid,\r
- 'rc_last_oldid' => $this->mOldid,\r
- 'rc_patrolled' => 0\r
- ),\r
- __METHOD__\r
- );\r
- if( $change instanceof RecentChange ) {\r
- $rcid = $change->mAttribs['rc_id'];\r
- $this->mRcidMarkPatrolled = $rcid;\r
- } else {\r
- // None found\r
- $rcid = 0;\r
- }\r
- }\r
- // Build the link\r
- if( $rcid ) {\r
- $patrol = ' <span class="patrollink">[' . $sk->link(\r
- $this->mTitle, \r
- wfMsgHtml( 'markaspatrolleddiff' ),\r
- array(),\r
- array(\r
- 'action' => 'markpatrolled',\r
- 'rcid' => $rcid\r
- ),\r
- array(\r
- 'known',\r
- 'noclasses'\r
- )\r
- ) . ']</span>';\r
- } else {\r
- $patrol = '';\r
- }\r
- } else {\r
- $patrol = '';\r
- }\r
-\r
- # Carry over 'diffonly' param via navigation links\r
- if( $diffOnly != $wgUser->getBoolOption('diffonly') ) {\r
- $query['diffonly'] = $diffOnly;\r
- }\r
-\r
- $htmldiffarg = $this->htmlDiffArgument();\r
-\r
- if( $htmldiffarg ) {\r
- $query['htmldiff'] = $htmldiffarg['htmldiff'];\r
- }\r
-\r
- # Make "previous revision link"\r
- $query['diff'] = 'prev';\r
- $query['oldid'] = $this->mOldid;\r
-\r
- $prevlink = $sk->link(\r
- $this->mTitle,\r
- wfMsgHtml( 'previousdiff' ),\r
- array(\r
- 'id' => 'differences-prevlink'\r
- ),\r
- $query,\r
- array(\r
- 'known',\r
- 'noclasses'\r
- )\r
- );\r
- # Make "next revision link"\r
- $query['diff'] = 'next';\r
- $query['oldid'] = $this->mNewid;\r
-\r
- if( $this->mNewRev->isCurrent() ) {\r
- $nextlink = ' ';\r
- } else {\r
- $nextlink = $sk->link(\r
- $this->mTitle,\r
- wfMsgHtml( 'nextdiff' ),\r
- array(\r
- 'id' => 'differences-nextlink'\r
- ),\r
- $query,\r
- array(\r
- 'known',\r
- 'noclasses'\r
- )\r
- );\r
- }\r
-\r
- $oldminor = '';\r
- $newminor = '';\r
-\r
- if( $this->mOldRev->isMinor() ) {\r
- $oldminor = ChangesList::flag( 'minor' );\r
- }\r
- if( $this->mNewRev->isMinor() ) {\r
- $newminor = ChangesList::flag( 'minor' );\r
- }\r
-\r
- $rdel = ''; $ldel = '';\r
- if( $wgUser->isAllowed( 'deletedhistory' ) ) {\r
- // Don't show useless link to people who cannot hide revisions\r
- if( $this->mOldRev->getVisibility() || $wgUser->isAllowed( 'deleterevision' ) ) {\r
- if( !$this->mOldRev->userCan( Revision::DELETED_RESTRICTED ) ) {\r
- // If revision was hidden from sysops\r
- $ldel = Xml::tags( 'span', array( 'class' => 'mw-revdelundel-link' ),\r
- '(' . wfMsgHtml( 'rev-delundel' ) . ')' );\r
- } else {\r
- $query = array( \r
- 'type' => 'revision',\r
- 'target' => $this->mOldRev->mTitle->getPrefixedDbkey(),\r
- 'ids' => $this->mOldRev->getId()\r
- );\r
- $ldel = $sk->revDeleteLink( $query, $this->mOldRev->isDeleted( Revision::DELETED_RESTRICTED ) );\r
- }\r
- $ldel = " $ldel ";\r
- }\r
- // Don't show useless link to people who cannot hide revisions\r
- if( $this->mNewRev->getVisibility() || $wgUser->isAllowed( 'deleterevision' ) ) {\r
- if( !$this->mNewRev->userCan( Revision::DELETED_RESTRICTED ) ) {\r
- // If revision was hidden from sysops\r
- $rdel = Xml::tags( 'span', array( 'class'=>'mw-revdelundel-link' ), '('.wfMsgHtml( 'rev-delundel' ).')' );\r
- } else {\r
- $query = array( \r
- 'type' => 'revision',\r
- 'target' => $this->mNewRev->mTitle->getPrefixedDbkey(),\r
- 'ids' => $this->mNewRev->getId()\r
- );\r
- $rdel = $sk->revDeleteLink( $query, $this->mNewRev->isDeleted( Revision::DELETED_RESTRICTED ) );\r
- }\r
- $rdel = " $rdel ";\r
- }\r
- }\r
-\r
- $oldHeader = '<div id="mw-diff-otitle1"><strong>'.$this->mOldtitle.'</strong></div>' .\r
- '<div id="mw-diff-otitle2">' . $sk->revUserTools( $this->mOldRev, !$this->unhide ) . "</div>" .\r
- '<div id="mw-diff-otitle3">' . $oldminor . $sk->revComment( $this->mOldRev, !$diffOnly, !$this->unhide ).$ldel."</div>" .\r
- '<div id="mw-diff-otitle4">' . $prevlink .'</div>';\r
- $newHeader = '<div id="mw-diff-ntitle1"><strong>'.$this->mNewtitle.'</strong></div>' .\r
- '<div id="mw-diff-ntitle2">' . $sk->revUserTools( $this->mNewRev, !$this->unhide ) . " $rollback</div>" .\r
- '<div id="mw-diff-ntitle3">' . $newminor . $sk->revComment( $this->mNewRev, !$diffOnly, !$this->unhide ).$rdel."</div>" .\r
- '<div id="mw-diff-ntitle4">' . $nextlink . $patrol . '</div>';\r
-\r
- # Check if this user can see the revisions\r
- $allowed = $this->mOldRev->userCan(Revision::DELETED_TEXT)\r
- && $this->mNewRev->userCan(Revision::DELETED_TEXT);\r
- # Check if one of the revisions is deleted/suppressed\r
- $deleted = $suppressed = false;\r
- if( $this->mOldRev->isDeleted(Revision::DELETED_TEXT) ) {\r
- $deleted = true; // old revisions text is hidden\r
- if( $this->mOldRev->isDeleted(Revision::DELETED_RESTRICTED) )\r
- $suppressed = true; // also suppressed\r
- }\r
- if( $this->mNewRev->isDeleted(Revision::DELETED_TEXT) ) {\r
- $deleted = true; // new revisions text is hidden\r
- if( $this->mNewRev->isDeleted(Revision::DELETED_RESTRICTED) )\r
- $suppressed = true; // also suppressed\r
- }\r
- # Output the diff if allowed...\r
- if( $deleted && (!$this->unhide || !$allowed) ) {\r
- $this->showDiffStyle();\r
- $multi = $this->getMultiNotice();\r
- $wgOut->addHTML( $this->addHeader( '', $oldHeader, $newHeader, $multi ) );\r
- if( !$allowed ) {\r
- # Give explanation for why revision is not visible\r
- $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1</div>\n",\r
- array( 'rev-deleted-no-diff' ) );\r
- } else {\r
- # Give explanation and add a link to view the diff...\r
- $link = $this->mTitle->getFullUrl( array(\r
- 'diff' => $this->mNewid,\r
- 'oldid' => $this->mOldid,\r
- 'unhide' => 1\r
- ) );\r
- $msg = $suppressed ? 'rev-suppressed-unhide-diff' : 'rev-deleted-unhide-diff';\r
- $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1</div>\n", array( $msg, $link ) );\r
- }\r
- } else if( $wgEnableHtmlDiff && $this->htmldiff ) {\r
- $multi = $this->getMultiNotice();\r
- $wgOut->addHTML( '<div class="diff-switchtype">' . $sk->link(\r
- $this->mTitle,\r
- wfMsgHtml( 'wikicodecomparison' ),\r
- array(\r
- 'id' => 'differences-switchtype'\r
- ),\r
- array(\r
- 'diff' => $this->mNewid,\r
- 'oldid' => $this->mOldid,\r
- 'htmldiff' => 0\r
- ),\r
- array(\r
- 'known',\r
- 'noclasses'\r
- )\r
- ) . '</div>');\r
- $wgOut->addHTML( $this->addHeader( '', $oldHeader, $newHeader, $multi ) );\r
- $this->renderHtmlDiff();\r
- } else {\r
- if( $wgEnableHtmlDiff ) {\r
- $wgOut->addHTML( '<div class="diff-switchtype">' . $sk->link(\r
- $this->mTitle,\r
- wfMsgHtml( 'visualcomparison' ),\r
- array(\r
- 'id' => 'differences-switchtype'\r
- ),\r
- array(\r
- 'diff' => $this->mNewid,\r
- 'oldid' => $this->mOldid,\r
- 'htmldiff' => 1\r
- ),\r
- array(\r
- 'known',\r
- 'noclasses'\r
- )\r
- ) . '</div>');\r
- }\r
- $this->showDiff( $oldHeader, $newHeader );\r
- if( !$diffOnly ) {\r
- $this->renderNewRevision();\r
- }\r
- }\r
- wfProfileOut( __METHOD__ );\r
- }\r
-\r
- /**\r
- * Show the new revision of the page.\r
- */\r
- function renderNewRevision() {\r
- global $wgOut, $wgUser;\r
- wfProfileIn( __METHOD__ );\r
-\r
- $wgOut->addHTML( "<hr /><h2>{$this->mPagetitle}</h2>\n" );\r
- # Add deleted rev tag if needed\r
- if( !$this->mNewRev->userCan(Revision::DELETED_TEXT) ) {\r
- $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1</div>\n", 'rev-deleted-text-permission' );\r
- } else if( $this->mNewRev->isDeleted(Revision::DELETED_TEXT) ) {\r
- $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1</div>\n", 'rev-deleted-text-view' );\r
- }\r
-\r
- if( !$this->mNewRev->isCurrent() ) {\r
- $oldEditSectionSetting = $wgOut->parserOptions()->setEditSection( false );\r
- }\r
-\r
- $this->loadNewText();\r
- if( is_object( $this->mNewRev ) ) {\r
- $wgOut->setRevisionId( $this->mNewRev->getId() );\r
- }\r
-\r
- if( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {\r
- // Stolen from Article::view --AG 2007-10-11\r
- // Give hooks a chance to customise the output\r
- if( wfRunHooks( 'ShowRawCssJs', array( $this->mNewtext, $this->mTitle, $wgOut ) ) ) {\r
- // Wrap the whole lot in a <pre> and don't parse\r
- $m = array();\r
- preg_match( '!\.(css|js)$!u', $this->mTitle->getText(), $m );\r
- $wgOut->addHTML( "<pre class=\"mw-code mw-{$m[1]}\" dir=\"ltr\">\n" );\r
- $wgOut->addHTML( htmlspecialchars( $this->mNewtext ) );\r
- $wgOut->addHTML( "\n</pre>\n" );\r
- }\r
- } else {\r
- $wgOut->addWikiTextTidy( $this->mNewtext );\r
- }\r
-\r
- if( is_object( $this->mNewRev ) && !$this->mNewRev->isCurrent() ) {\r
- $wgOut->parserOptions()->setEditSection( $oldEditSectionSetting );\r
- }\r
- # Add redundant patrol link on bottom...\r
- if( $this->mRcidMarkPatrolled && $this->mTitle->quickUserCan('patrol') ) {\r
- $sk = $wgUser->getSkin();\r
- $wgOut->addHTML(\r
- "<div class='patrollink'>[" . $sk->link(\r
- $this->mTitle,\r
- wfMsgHtml( 'markaspatrolleddiff' ),\r
- array(),\r
- array(\r
- 'action' => 'markpatrolled',\r
- 'rcid' => $this->mRcidMarkPatrolled\r
- )\r
- ) . ']</div>'\r
- );\r
- }\r
-\r
- wfProfileOut( __METHOD__ );\r
- }\r
-\r
-\r
- function renderHtmlDiff() {\r
- global $wgOut, $wgParser, $wgDebugComments;\r
- wfProfileIn( __METHOD__ );\r
-\r
- $this->showDiffStyle();\r
-\r
- $wgOut->addHTML( '<h2>'.wfMsgHtml( 'visual-comparison' )."</h2>\n" );\r
- #add deleted rev tag if needed\r
- if( !$this->mNewRev->userCan(Revision::DELETED_TEXT) ) {\r
- $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1</div>\n", 'rev-deleted-text-permission' );\r
- } else if( $this->mNewRev->isDeleted(Revision::DELETED_TEXT) ) {\r
- $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1</div>\n", 'rev-deleted-text-view' );\r
- }\r
-\r
- if( !$this->mNewRev->isCurrent() ) {\r
- $oldEditSectionSetting = $wgOut->parserOptions()->setEditSection( false );\r
- }\r
-\r
- $this->loadText();\r
-\r
- // Old revision\r
- if( is_object( $this->mOldRev ) ) {\r
- $wgOut->setRevisionId( $this->mOldRev->getId() );\r
- }\r
-\r
- $popts = $wgOut->parserOptions();\r
- $oldTidy = $popts->setTidy( true );\r
- $popts->setEditSection( false );\r
-\r
- $parserOutput = $wgParser->parse( $this->mOldtext, $this->getTitle(), $popts, true, true, $wgOut->getRevisionId() );\r
- $popts->setTidy( $oldTidy );\r
-\r
- //only for new?\r
- //$wgOut->addParserOutputNoText( $parserOutput );\r
- $oldHtml = $parserOutput->getText();\r
- wfRunHooks( 'OutputPageBeforeHTML', array( &$wgOut, &$oldHtml ) );\r
-\r
- // New revision\r
- if( is_object( $this->mNewRev ) ) {\r
- $wgOut->setRevisionId( $this->mNewRev->getId() );\r
- }\r
-\r
- $popts = $wgOut->parserOptions();\r
- $oldTidy = $popts->setTidy( true );\r
-\r
- $parserOutput = $wgParser->parse( $this->mNewtext, $this->getTitle(), $popts, true, true, $wgOut->getRevisionId() );\r
- $popts->setTidy( $oldTidy );\r
-\r
- $wgOut->addParserOutputNoText( $parserOutput );\r
- $newHtml = $parserOutput->getText();\r
- wfRunHooks( 'OutputPageBeforeHTML', array( &$wgOut, &$newHtml ) );\r
-\r
- unset($parserOutput, $popts);\r
-\r
- $differ = new HTMLDiffer(new DelegatingContentHandler($wgOut));\r
- $differ->htmlDiff($oldHtml, $newHtml);\r
- if ( $wgDebugComments ) {\r
- $wgOut->addHTML( "\n<!-- HtmlDiff Debug Output:\n" . HTMLDiffer::getDebugOutput() . " End Debug -->" );\r
- }\r
-\r
- wfProfileOut( __METHOD__ );\r
- }\r
-\r
- /**\r
- * Show the first revision of an article. Uses normal diff headers in\r
- * contrast to normal "old revision" display style.\r
- */\r
- function showFirstRevision() {\r
- global $wgOut, $wgUser;\r
- wfProfileIn( __METHOD__ );\r
-\r
- # Get article text from the DB\r
- #\r
- if ( ! $this->loadNewText() ) {\r
- $t = $this->mTitle->getPrefixedText();\r
- $d = wfMsgExt( 'missingarticle-diff', array( 'escape' ), $this->mOldid, $this->mNewid );\r
- $wgOut->setPagetitle( wfMsg( 'errorpagetitle' ) );\r
- $wgOut->addWikiMsg( 'missing-article', "<nowiki>$t</nowiki>", $d );\r
- wfProfileOut( __METHOD__ );\r
- return;\r
- }\r
- if ( $this->mNewRev->isCurrent() ) {\r
- $wgOut->setArticleFlag( true );\r
- }\r
-\r
- # Check if user is allowed to look at this page. If not, bail out.\r
- #\r
- if ( !$this->mTitle->userCanRead() ) {\r
- $wgOut->loginToUse();\r
- $wgOut->output();\r
- wfProfileOut( __METHOD__ );\r
- throw new MWException("Permission Error: you do not have access to view this page");\r
- }\r
-\r
- # Prepare the header box\r
- #\r
- $sk = $wgUser->getSkin();\r
-\r
- $next = $this->mTitle->getNextRevisionID( $this->mNewid );\r
- if( !$next ) {\r
- $nextlink = '';\r
- } else {\r
- $nextlink = '<br/>' . $sk->link(\r
- $this->mTitle,\r
- wfMsgHtml( 'nextdiff' ),\r
- array(\r
- 'id' => 'differences-nextlink'\r
- ),\r
- array(\r
- 'diff' => 'next',\r
- 'oldid' => $this->mNewid,\r
- $this->htmlDiffArgument()\r
- ),\r
- array(\r
- 'known',\r
- 'noclasses'\r
- )\r
- );\r
- }\r
- $header = "<div class=\"firstrevisionheader\" style=\"text-align: center\">" .\r
- $sk->revUserTools( $this->mNewRev ) . "<br/>" . $sk->revComment( $this->mNewRev ) . $nextlink . "</div>\n";\r
-\r
- $wgOut->addHTML( $header );\r
-\r
- $wgOut->setSubtitle( wfMsgExt( 'difference', array( 'parseinline' ) ) );\r
- $wgOut->setRobotPolicy( 'noindex,nofollow' );\r
-\r
- wfProfileOut( __METHOD__ );\r
- }\r
-\r
- function htmlDiffArgument(){\r
- global $wgEnableHtmlDiff;\r
- if($wgEnableHtmlDiff){\r
- if($this->htmldiff){\r
- return array( 'htmldiff' => 1 );\r
- }else{\r
- return array( 'htmldiff' => 0 );\r
- }\r
- }else{\r
- return array();\r
- }\r
- }\r
-\r
- /**\r
- * Get the diff text, send it to $wgOut\r
- * Returns false if the diff could not be generated, otherwise returns true\r
- */\r
- function showDiff( $otitle, $ntitle ) {\r
- global $wgOut;\r
- $diff = $this->getDiff( $otitle, $ntitle );\r
- if ( $diff === false ) {\r
- $wgOut->addWikiMsg( 'missing-article', "<nowiki>(fixme, bug)</nowiki>", '' );\r
- return false;\r
- } else {\r
- $this->showDiffStyle();\r
- $wgOut->addHTML( $diff );\r
- return true;\r
- }\r
- }\r
-\r
- /**\r
- * Add style sheets and supporting JS for diff display.\r
- */\r
- function showDiffStyle() {\r
- global $wgStylePath, $wgStyleVersion, $wgOut;\r
- $wgOut->addStyle( 'common/diff.css' );\r
-\r
- // JS is needed to detect old versions of Mozilla to work around an annoyance bug.\r
- $wgOut->addScript( "<script type=\"text/javascript\" src=\"$wgStylePath/common/diff.js?$wgStyleVersion\"></script>" );\r
- }\r
-\r
- /**\r
- * Get complete diff table, including header\r
- *\r
- * @param Title $otitle Old title\r
- * @param Title $ntitle New title\r
- * @return mixed\r
- */\r
- function getDiff( $otitle, $ntitle ) {\r
- $body = $this->getDiffBody();\r
- if ( $body === false ) {\r
- return false;\r
- } else {\r
- $multi = $this->getMultiNotice();\r
- return $this->addHeader( $body, $otitle, $ntitle, $multi );\r
- }\r
- }\r
-\r
- /**\r
- * Get the diff table body, without header\r
- *\r
- * @return mixed\r
- */\r
- function getDiffBody() {\r
- global $wgMemc;\r
- wfProfileIn( __METHOD__ );\r
- $this->mCacheHit = true;\r
- // Check if the diff should be hidden from this user\r
- if ( !$this->loadRevisionData() )\r
- return '';\r
- if ( $this->mOldRev && !$this->mOldRev->userCan(Revision::DELETED_TEXT) ) {\r
- return '';\r
- } else if ( $this->mNewRev && !$this->mNewRev->userCan(Revision::DELETED_TEXT) ) {\r
- return '';\r
- } else if ( $this->mOldRev && $this->mNewRev && $this->mOldRev->getID() == $this->mNewRev->getID() ) {\r
- return '';\r
- }\r
- // Cacheable?\r
- $key = false;\r
- if ( $this->mOldid && $this->mNewid ) {\r
- $key = wfMemcKey( 'diff', 'version', MW_DIFF_VERSION, 'oldid', $this->mOldid, 'newid', $this->mNewid );\r
- // Try cache\r
- if ( !$this->mRefreshCache ) {\r
- $difftext = $wgMemc->get( $key );\r
- if ( $difftext ) {\r
- wfIncrStats( 'diff_cache_hit' );\r
- $difftext = $this->localiseLineNumbers( $difftext );\r
- $difftext .= "\n<!-- diff cache key $key -->\n";\r
- wfProfileOut( __METHOD__ );\r
- return $difftext;\r
- }\r
- } // don't try to load but save the result\r
- }\r
- $this->mCacheHit = false;\r
-\r
- // Loadtext is permission safe, this just clears out the diff\r
- if ( !$this->loadText() ) {\r
- wfProfileOut( __METHOD__ );\r
- return false;\r
- }\r
-\r
- $difftext = $this->generateDiffBody( $this->mOldtext, $this->mNewtext );\r
-\r
- // Save to cache for 7 days\r
- if ( !wfRunHooks( 'AbortDiffCache', array( &$this ) ) ) {\r
- wfIncrStats( 'diff_uncacheable' );\r
- } else if ( $key !== false && $difftext !== false ) {\r
- wfIncrStats( 'diff_cache_miss' );\r
- $wgMemc->set( $key, $difftext, 7*86400 );\r
- } else {\r
- wfIncrStats( 'diff_uncacheable' );\r
- }\r
- // Replace line numbers with the text in the user's language\r
- if ( $difftext !== false ) {\r
- $difftext = $this->localiseLineNumbers( $difftext );\r
- }\r
- wfProfileOut( __METHOD__ );\r
- return $difftext;\r
- }\r
-\r
- /**\r
- * Make sure the proper modules are loaded before we try to\r
- * make the diff\r
- */\r
- private function initDiffEngines() {\r
- global $wgExternalDiffEngine;\r
- if ( $wgExternalDiffEngine == 'wikidiff' && !function_exists( 'wikidiff_do_diff' ) ) {\r
- wfProfileIn( __METHOD__ . '-php_wikidiff.so' );\r
- wfSuppressWarnings();\r
- dl( 'php_wikidiff.so' );\r
- wfRestoreWarnings();\r
- wfProfileOut( __METHOD__ . '-php_wikidiff.so' );\r
- }\r
- else if ( $wgExternalDiffEngine == 'wikidiff2' && !function_exists( 'wikidiff2_do_diff' ) ) {\r
- wfProfileIn( __METHOD__ . '-php_wikidiff2.so' );\r
- wfSuppressWarnings();\r
- dl( 'php_wikidiff2.so' );\r
- wfRestoreWarnings();\r
- wfProfileOut( __METHOD__ . '-php_wikidiff2.so' );\r
- }\r
- }\r
-\r
- /**\r
- * Generate a diff, no caching\r
- * $otext and $ntext must be already segmented\r
- */\r
- function generateDiffBody( $otext, $ntext ) {\r
- global $wgExternalDiffEngine, $wgContLang;\r
-\r
- $otext = str_replace( "\r\n", "\n", $otext );\r
- $ntext = str_replace( "\r\n", "\n", $ntext );\r
-\r
- $this->initDiffEngines();\r
-\r
- if ( $wgExternalDiffEngine == 'wikidiff' && function_exists( 'wikidiff_do_diff' ) ) {\r
- # For historical reasons, external diff engine expects\r
- # input text to be HTML-escaped already\r
- $otext = htmlspecialchars ( $wgContLang->segmentForDiff( $otext ) );\r
- $ntext = htmlspecialchars ( $wgContLang->segmentForDiff( $ntext ) );\r
- return $wgContLang->unsegementForDiff( wikidiff_do_diff( $otext, $ntext, 2 ) ) .\r
- $this->debug( 'wikidiff1' );\r
- }\r
-\r
- if ( $wgExternalDiffEngine == 'wikidiff2' && function_exists( 'wikidiff2_do_diff' ) ) {\r
- # Better external diff engine, the 2 may some day be dropped\r
- # This one does the escaping and segmenting itself\r
- wfProfileIn( 'wikidiff2_do_diff' );\r
- $text = wikidiff2_do_diff( $otext, $ntext, 2 );\r
- $text .= $this->debug( 'wikidiff2' );\r
- wfProfileOut( 'wikidiff2_do_diff' );\r
- return $text;\r
- }\r
- if ( $wgExternalDiffEngine != 'wikidiff3' && $wgExternalDiffEngine !== false ) {\r
- # Diff via the shell\r
- global $wgTmpDirectory;\r
- $tempName1 = tempnam( $wgTmpDirectory, 'diff_' );\r
- $tempName2 = tempnam( $wgTmpDirectory, 'diff_' );\r
-\r
- $tempFile1 = fopen( $tempName1, "w" );\r
- if ( !$tempFile1 ) {\r
- wfProfileOut( __METHOD__ );\r
- return false;\r
- }\r
- $tempFile2 = fopen( $tempName2, "w" );\r
- if ( !$tempFile2 ) {\r
- wfProfileOut( __METHOD__ );\r
- return false;\r
- }\r
- fwrite( $tempFile1, $otext );\r
- fwrite( $tempFile2, $ntext );\r
- fclose( $tempFile1 );\r
- fclose( $tempFile2 );\r
- $cmd = wfEscapeShellArg( $wgExternalDiffEngine, $tempName1, $tempName2 );\r
- wfProfileIn( __METHOD__ . "-shellexec" );\r
- $difftext = wfShellExec( $cmd );\r
- $difftext .= $this->debug( "external $wgExternalDiffEngine" );\r
- wfProfileOut( __METHOD__ . "-shellexec" );\r
- unlink( $tempName1 );\r
- unlink( $tempName2 );\r
- return $difftext;\r
- }\r
-\r
- # Native PHP diff\r
- $ota = explode( "\n", $wgContLang->segmentForDiff( $otext ) );\r
- $nta = explode( "\n", $wgContLang->segmentForDiff( $ntext ) );\r
- $diffs = new Diff( $ota, $nta );\r
- $formatter = new TableDiffFormatter();\r
- return $wgContLang->unsegmentForDiff( $formatter->format( $diffs ) ) .\r
- $this->debug();\r
- }\r
-\r
- /**\r
- * Generate a debug comment indicating diff generating time,\r
- * server node, and generator backend.\r
- */\r
- protected function debug( $generator="internal" ) {\r
- global $wgShowHostnames;\r
- if ( !$this->enableDebugComment ) {\r
- return '';\r
- }\r
- $data = array( $generator );\r
- if( $wgShowHostnames ) {\r
- $data[] = wfHostname();\r
- }\r
- $data[] = wfTimestamp( TS_DB );\r
- return "<!-- diff generator: " .\r
- implode( " ",\r
- array_map(\r
- "htmlspecialchars",\r
- $data ) ) .\r
- " -->\n";\r
- }\r
-\r
- /**\r
- * Replace line numbers with the text in the user's language\r
- */\r
- function localiseLineNumbers( $text ) {\r
- return preg_replace_callback( '/<!--LINE (\d+)-->/',\r
- array( &$this, 'localiseLineNumbersCb' ), $text );\r
- }\r
-\r
- function localiseLineNumbersCb( $matches ) {\r
- global $wgLang;\r
- if ( $matches[1] === '1' && $this->mReducedLineNumbers ) return '';\r
- return wfMsgExt( 'lineno', 'escape', $wgLang->formatNum( $matches[1] ) );\r
- }\r
-\r
-\r
- /**\r
- * If there are revisions between the ones being compared, return a note saying so.\r
- */\r
- function getMultiNotice() {\r
- if ( !is_object($this->mOldRev) || !is_object($this->mNewRev) )\r
- return '';\r
-\r
- if( !$this->mOldPage->equals( $this->mNewPage ) ) {\r
- // Comparing two different pages? Count would be meaningless.\r
- return '';\r
- }\r
-\r
- $oldid = $this->mOldRev->getId();\r
- $newid = $this->mNewRev->getId();\r
- if ( $oldid > $newid ) {\r
- $tmp = $oldid; $oldid = $newid; $newid = $tmp;\r
- }\r
-\r
- $n = $this->mTitle->countRevisionsBetween( $oldid, $newid );\r
- if ( !$n )\r
- return '';\r
-\r
- return wfMsgExt( 'diff-multi', array( 'parseinline' ), $n );\r
- }\r
-\r
-\r
- /**\r
- * Add the header to a diff body\r
- */\r
- static function addHeader( $diff, $otitle, $ntitle, $multi = '' ) {\r
- $colspan = 1;\r
- $header = "<table class='diff'>";\r
- if( $diff ) { // Safari/Chrome show broken output if cols not used\r
- $header .= "\r
- <col class='diff-marker' />\r
- <col class='diff-content' />\r
- <col class='diff-marker' />\r
- <col class='diff-content' />";\r
- $colspan = 2;\r
- }\r
- $header .= "\r
- <tr valign='top'>\r
- <td colspan='$colspan' class='diff-otitle'>{$otitle}</td>\r
- <td colspan='$colspan' class='diff-ntitle'>{$ntitle}</td>\r
- </tr>";\r
-\r
- if ( $multi != '' )\r
- $header .= "<tr><td colspan='4' align='center' class='diff-multi'>{$multi}</td></tr>";\r
-\r
- return $header . $diff . "</table>";\r
- }\r
-\r
- /**\r
- * Use specified text instead of loading from the database\r
- */\r
- function setText( $oldText, $newText ) {\r
- $this->mOldtext = $oldText;\r
- $this->mNewtext = $newText;\r
- $this->mTextLoaded = 2;\r
- $this->mRevisionsLoaded = true;\r
- }\r
-\r
- /**\r
- * Load revision metadata for the specified articles. If newid is 0, then compare\r
- * the old article in oldid to the current article; if oldid is 0, then\r
- * compare the current article to the immediately previous one (ignoring the\r
- * value of newid).\r
- *\r
- * If oldid is false, leave the corresponding revision object set\r
- * to false. This is impossible via ordinary user input, and is provided for\r
- * API convenience.\r
- */\r
- function loadRevisionData() {\r
- global $wgLang, $wgUser;\r
- if ( $this->mRevisionsLoaded ) {\r
- return true;\r
- } else {\r
- // Whether it succeeds or fails, we don't want to try again\r
- $this->mRevisionsLoaded = true;\r
- }\r
-\r
- // Load the new revision object\r
- $this->mNewRev = $this->mNewid\r
- ? Revision::newFromId( $this->mNewid )\r
- : Revision::newFromTitle( $this->mTitle );\r
- if( !$this->mNewRev instanceof Revision )\r
- return false;\r
-\r
- // Update the new revision ID in case it was 0 (makes life easier doing UI stuff)\r
- $this->mNewid = $this->mNewRev->getId();\r
-\r
- // Check if page is editable\r
- $editable = $this->mNewRev->getTitle()->userCan( 'edit' );\r
-\r
- // Set assorted variables\r
- $timestamp = $wgLang->timeanddate( $this->mNewRev->getTimestamp(), true );\r
- $dateofrev = $wgLang->date( $this->mNewRev->getTimestamp(), true );\r
- $timeofrev = $wgLang->time( $this->mNewRev->getTimestamp(), true );\r
- $this->mNewPage = $this->mNewRev->getTitle();\r
- if( $this->mNewRev->isCurrent() ) {\r
- $newLink = $this->mNewPage->escapeLocalUrl( array(\r
- 'oldid' => $this->mNewid\r
- ) );\r
- $this->mPagetitle = htmlspecialchars( wfMsg(\r
- 'currentrev-asof',\r
- $timestamp,\r
- $dateofrev,\r
- $timeofrev\r
- ) );\r
- $newEdit = $this->mNewPage->escapeLocalUrl( array(\r
- 'action' => 'edit'\r
- ) );\r
-\r
- $this->mNewtitle = "<a href='$newLink'>{$this->mPagetitle}</a>";\r
- $this->mNewtitle .= " (<a href='$newEdit'>" . wfMsgHtml( $editable ? 'editold' : 'viewsourceold' ) . "</a>)";\r
- } else {\r
- $newLink = $this->mNewPage->escapeLocalUrl( array(\r
- 'oldid' => $this->mNewid\r
- ) );\r
- $newEdit = $this->mNewPage->escapeLocalUrl( array(\r
- 'action' => 'edit',\r
- 'oldid' => $this->mNewid\r
- ) );\r
- $this->mPagetitle = htmlspecialchars( wfMsg(\r
- 'revisionasof',\r
- $timestamp,\r
- $dateofrev,\r
- $timeofrev\r
- ) );\r
-\r
- $this->mNewtitle = "<a href='$newLink'>{$this->mPagetitle}</a>";\r
- $this->mNewtitle .= " (<a href='$newEdit'>" . wfMsgHtml( $editable ? 'editold' : 'viewsourceold' ) . "</a>)";\r
- }\r
- if( !$this->mNewRev->userCan(Revision::DELETED_TEXT) ) {\r
- $this->mNewtitle = "<span class='history-deleted'>{$this->mPagetitle}</span>";\r
- } else if ( $this->mNewRev->isDeleted(Revision::DELETED_TEXT) ) {\r
- $this->mNewtitle = "<span class='history-deleted'>{$this->mNewtitle}</span>";\r
- }\r
-\r
- // Load the old revision object\r
- $this->mOldRev = false;\r
- if( $this->mOldid ) {\r
- $this->mOldRev = Revision::newFromId( $this->mOldid );\r
- } elseif ( $this->mOldid === 0 ) {\r
- $rev = $this->mNewRev->getPrevious();\r
- if( $rev ) {\r
- $this->mOldid = $rev->getId();\r
- $this->mOldRev = $rev;\r
- } else {\r
- // No previous revision; mark to show as first-version only.\r
- $this->mOldid = false;\r
- $this->mOldRev = false;\r
- }\r
- }/* elseif ( $this->mOldid === false ) leave mOldRev false; */\r
-\r
- if( is_null( $this->mOldRev ) ) {\r
- return false;\r
- }\r
-\r
- if ( $this->mOldRev ) {\r
- $this->mOldPage = $this->mOldRev->getTitle();\r
-\r
- $t = $wgLang->timeanddate( $this->mOldRev->getTimestamp(), true );\r
- $dateofrev = $wgLang->date( $this->mOldRev->getTimestamp(), true );\r
- $timeofrev = $wgLang->time( $this->mOldRev->getTimestamp(), true );\r
- $oldLink = $this->mOldPage->escapeLocalUrl( array(\r
- 'oldid' => $this->mOldid\r
- ) );\r
- $oldEdit = $this->mOldPage->escapeLocalUrl( array(\r
- 'action' => 'edit',\r
- 'oldid' => $this->mOldid\r
- ) );\r
- $this->mOldPagetitle = htmlspecialchars( wfMsg( 'revisionasof', $t, $dateofrev, $timeofrev ) );\r
-\r
- $this->mOldtitle = "<a href='$oldLink'>{$this->mOldPagetitle}</a>"\r
- . " (<a href='$oldEdit'>" . wfMsgHtml( $editable ? 'editold' : 'viewsourceold' ) . "</a>)";\r
- // Add an "undo" link\r
- $newUndo = $this->mNewPage->escapeLocalUrl( array(\r
- 'action' => 'edit',\r
- 'undoafter' => $this->mOldid,\r
- 'undo' => $this->mNewid\r
- ) );\r
- $htmlLink = htmlspecialchars( wfMsg( 'editundo' ) );\r
- $htmlTitle = $wgUser->getSkin()->tooltip( 'undo' );\r
- if( $editable && !$this->mOldRev->isDeleted( Revision::DELETED_TEXT ) && !$this->mNewRev->isDeleted( Revision::DELETED_TEXT ) ) {\r
- $this->mNewtitle .= " (<a href='$newUndo' $htmlTitle>" . $htmlLink . "</a>)";\r
- }\r
-\r
- if( !$this->mOldRev->userCan( Revision::DELETED_TEXT ) ) {\r
- $this->mOldtitle = '<span class="history-deleted">' . $this->mOldPagetitle . '</span>';\r
- } else if( $this->mOldRev->isDeleted( Revision::DELETED_TEXT ) ) {\r
- $this->mOldtitle = '<span class="history-deleted">' . $this->mOldtitle . '</span>';\r
- }\r
- }\r
-\r
- return true;\r
- }\r
-\r
- /**\r
- * Load the text of the revisions, as well as revision data.\r
- */\r
- function loadText() {\r
- if ( $this->mTextLoaded == 2 ) {\r
- return true;\r
- } else {\r
- // Whether it succeeds or fails, we don't want to try again\r
- $this->mTextLoaded = 2;\r
- }\r
-\r
- if ( !$this->loadRevisionData() ) {\r
- return false;\r
- }\r
- if ( $this->mOldRev ) {\r
- $this->mOldtext = $this->mOldRev->getText( Revision::FOR_THIS_USER );\r
- if ( $this->mOldtext === false ) {\r
- return false;\r
- }\r
- }\r
- if ( $this->mNewRev ) {\r
- $this->mNewtext = $this->mNewRev->getText( Revision::FOR_THIS_USER );\r
- if ( $this->mNewtext === false ) {\r
- return false;\r
- }\r
- }\r
- return true;\r
- }\r
-\r
- /**\r
- * Load the text of the new revision, not the old one\r
- */\r
- function loadNewText() {\r
- if ( $this->mTextLoaded >= 1 ) {\r
- return true;\r
- } else {\r
- $this->mTextLoaded = 1;\r
- }\r
- if ( !$this->loadRevisionData() ) {\r
- return false;\r
- }\r
- $this->mNewtext = $this->mNewRev->getText( Revision::FOR_THIS_USER );\r
- return true;\r
- }\r
-}\r
+<?php
+/**
+ * @defgroup DifferenceEngine DifferenceEngine
+ */
+
+/**
+ * Constant to indicate diff cache compatibility.
+ * Bump this when changing the diff formatting in a way that
+ * fixes important bugs or such to force cached diff views to
+ * clear.
+ */
+define( 'MW_DIFF_VERSION', '1.11a' );
+
+/**
+ * @todo document
+ * @ingroup DifferenceEngine
+ */
+class DifferenceEngine {
+ /**#@+
+ * @private
+ */
+ var $mOldid, $mNewid, $mTitle;
+ var $mOldtitle, $mNewtitle, $mPagetitle;
+ var $mOldtext, $mNewtext;
+ var $mOldPage, $mNewPage;
+ var $mRcidMarkPatrolled;
+ var $mOldRev, $mNewRev;
+ var $mRevisionsLoaded = false; // Have the revisions been loaded
+ var $mTextLoaded = 0; // How many text blobs have been loaded, 0, 1 or 2?
+ var $mCacheHit = false; // Was the diff fetched from cache?
+ var $htmldiff;
+
+ /**
+ * 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)
+ */
+ var $enableDebugComment = false;
+
+ // If true, line X is not displayed when X is 1, for example to increase
+ // readability and conserve space with many small diffs.
+ protected $mReducedLineNumbers = false;
+
+ protected $unhide = false;
+ /**#@-*/
+
+ /**
+ * Constructor
+ * @param $titleObj Title object that the diff is associated with
+ * @param $old Integer: old ID we want to show and diff with.
+ * @param $new String: either 'prev' or 'next'.
+ * @param $rcid Integer: ??? FIXME (default 0)
+ * @param $refreshCache boolean If set, refreshes the diff cache
+ * @param $htmldiff boolean If set, output using HTMLDiff instead of raw wikicode diff
+ * @param $unhide boolean If set, allow viewing deleted revs
+ */
+ function __construct( $titleObj = null, $old = 0, $new = 0, $rcid = 0,
+ $refreshCache = false, $htmldiff = false, $unhide = false )
+ {
+ if ( $titleObj ) {
+ $this->mTitle = $titleObj;
+ } else {
+ global $wgTitle;
+ $this->mTitle = $wgTitle;
+ }
+ wfDebug("DifferenceEngine old '$old' new '$new' rcid '$rcid'\n");
+
+ if ( 'prev' === $new ) {
+ # Show diff between revision $old and the previous one.
+ # Get previous one from DB.
+ $this->mNewid = intval($old);
+ $this->mOldid = $this->mTitle->getPreviousRevisionID( $this->mNewid );
+ } elseif ( 'next' === $new ) {
+ # Show diff between revision $old and the next one.
+ # Get next one from DB.
+ $this->mOldid = intval($old);
+ $this->mNewid = $this->mTitle->getNextRevisionID( $this->mOldid );
+ if ( false === $this->mNewid ) {
+ # if no result, NewId points to the newest old revision. The only newer
+ # revision is cur, which is "0".
+ $this->mNewid = 0;
+ }
+ } else {
+ $this->mOldid = intval($old);
+ $this->mNewid = intval($new);
+ wfRunHooks( 'NewDifferenceEngine', array(&$titleObj, &$this->mOldid, &$this->mNewid, $old, $new) );
+ }
+ $this->mRcidMarkPatrolled = intval($rcid); # force it to be an integer
+ $this->mRefreshCache = $refreshCache;
+ $this->htmldiff = $htmldiff;
+ $this->unhide = $unhide;
+ }
+
+ function setReducedLineNumbers( $value = true ) {
+ $this->mReducedLineNumbers = $value;
+ }
+
+ function getTitle() {
+ return $this->mTitle;
+ }
+
+ function wasCacheHit() {
+ return $this->mCacheHit;
+ }
+
+ function getOldid() {
+ return $this->mOldid;
+ }
+
+ function getNewid() {
+ return $this->mNewid;
+ }
+
+ function showDiffPage( $diffOnly = false ) {
+ global $wgUser, $wgOut, $wgUseExternalEditor, $wgUseRCPatrol, $wgEnableHtmlDiff;
+ wfProfileIn( __METHOD__ );
+
+
+ # If external diffs are enabled both globally and for the user,
+ # we'll use the application/x-external-editor interface to call
+ # an external diff tool like kompare, kdiff3, etc.
+ if($wgUseExternalEditor && $wgUser->getOption('externaldiff')) {
+ global $wgInputEncoding,$wgServer,$wgScript,$wgLang;
+ $wgOut->disable();
+ header ( "Content-type: application/x-external-editor; charset=".$wgInputEncoding );
+ $url1=$this->mTitle->getFullURL( array(
+ 'action' => 'raw',
+ 'oldid' => $this->mOldid
+ ) );
+ $url2=$this->mTitle->getFullURL( array(
+ 'action' => 'raw',
+ 'oldid' => $this->mNewid
+ ) );
+ $special=$wgLang->getNsText(NS_SPECIAL);
+ $control=<<<CONTROL
+ [Process]
+ Type=Diff text
+ Engine=MediaWiki
+ Script={$wgServer}{$wgScript}
+ Special namespace={$special}
+
+ [File]
+ Extension=wiki
+ URL=$url1
+
+ [File 2]
+ Extension=wiki
+ URL=$url2
+CONTROL;
+ echo($control);
+ return;
+ }
+
+ $wgOut->setArticleFlag( false );
+ if ( !$this->loadRevisionData() ) {
+ $t = $this->mTitle->getPrefixedText();
+ $d = wfMsgExt( 'missingarticle-diff', array( 'escape' ), $this->mOldid, $this->mNewid );
+ $wgOut->setPagetitle( wfMsg( 'errorpagetitle' ) );
+ $wgOut->addWikiMsg( 'missing-article', "<nowiki>$t</nowiki>", $d );
+ wfProfileOut( __METHOD__ );
+ return;
+ }
+
+ wfRunHooks( 'DiffViewHeader', array( $this, $this->mOldRev, $this->mNewRev ) );
+
+ if ( $this->mNewRev->isCurrent() ) {
+ $wgOut->setArticleFlag( true );
+ }
+
+ # mOldid is false if the difference engine is called with a "vague" query for
+ # a diff between a version V and its previous version V' AND the version V
+ # is the first version of that article. In that case, V' does not exist.
+ if ( $this->mOldid === false ) {
+ $this->showFirstRevision();
+ $this->renderNewRevision(); // should we respect $diffOnly here or not?
+ wfProfileOut( __METHOD__ );
+ return;
+ }
+
+ $wgOut->suppressQuickbar();
+
+ $oldTitle = $this->mOldPage->getPrefixedText();
+ $newTitle = $this->mNewPage->getPrefixedText();
+ if( $oldTitle == $newTitle ) {
+ $wgOut->setPageTitle( $newTitle );
+ } else {
+ $wgOut->setPageTitle( $oldTitle . ', ' . $newTitle );
+ }
+ $wgOut->setSubtitle( wfMsgExt( 'difference', array( 'parseinline' ) ) );
+ $wgOut->setRobotPolicy( 'noindex,nofollow' );
+
+ if ( !$this->mOldPage->userCanRead() || !$this->mNewPage->userCanRead() ) {
+ $wgOut->loginToUse();
+ $wgOut->output();
+ $wgOut->disable();
+ wfProfileOut( __METHOD__ );
+ return;
+ }
+
+ $sk = $wgUser->getSkin();
+
+ // Check if page is editable
+ $editable = $this->mNewRev->getTitle()->userCan( 'edit' );
+ if ( $editable && $this->mNewRev->isCurrent() && $wgUser->isAllowed( 'rollback' ) ) {
+ $rollback = ' ' . $sk->generateRollback( $this->mNewRev );
+ } else {
+ $rollback = '';
+ }
+
+ // Prepare a change patrol link, if applicable
+ if( $wgUseRCPatrol && $this->mTitle->userCan('patrol') ) {
+ // If we've been given an explicit change identifier, use it; saves time
+ if( $this->mRcidMarkPatrolled ) {
+ $rcid = $this->mRcidMarkPatrolled;
+ $rc = RecentChange::newFromId( $rcid );
+ // Already patrolled?
+ $rcid = is_object($rc) && !$rc->getAttribute('rc_patrolled') ? $rcid : 0;
+ } else {
+ // Look for an unpatrolled change corresponding to this diff
+ $db = wfGetDB( DB_SLAVE );
+ $change = RecentChange::newFromConds(
+ array(
+ // Redundant user,timestamp condition so we can use the existing index
+ 'rc_user_text' => $this->mNewRev->getRawUserText(),
+ 'rc_timestamp' => $db->timestamp( $this->mNewRev->getTimestamp() ),
+ 'rc_this_oldid' => $this->mNewid,
+ 'rc_last_oldid' => $this->mOldid,
+ 'rc_patrolled' => 0
+ ),
+ __METHOD__
+ );
+ if( $change instanceof RecentChange ) {
+ $rcid = $change->mAttribs['rc_id'];
+ $this->mRcidMarkPatrolled = $rcid;
+ } else {
+ // None found
+ $rcid = 0;
+ }
+ }
+ // Build the link
+ if( $rcid ) {
+ $patrol = ' <span class="patrollink">[' . $sk->link(
+ $this->mTitle,
+ wfMsgHtml( 'markaspatrolleddiff' ),
+ array(),
+ array(
+ 'action' => 'markpatrolled',
+ 'rcid' => $rcid
+ ),
+ array(
+ 'known',
+ 'noclasses'
+ )
+ ) . ']</span>';
+ } else {
+ $patrol = '';
+ }
+ } else {
+ $patrol = '';
+ }
+
+ # Carry over 'diffonly' param via navigation links
+ if( $diffOnly != $wgUser->getBoolOption('diffonly') ) {
+ $query['diffonly'] = $diffOnly;
+ }
+
+ $htmldiffarg = $this->htmlDiffArgument();
+
+ if( $htmldiffarg ) {
+ $query['htmldiff'] = $htmldiffarg['htmldiff'];
+ }
+
+ # Make "previous revision link"
+ $query['diff'] = 'prev';
+ $query['oldid'] = $this->mOldid;
+
+ $prevlink = $sk->link(
+ $this->mTitle,
+ wfMsgHtml( 'previousdiff' ),
+ array(
+ 'id' => 'differences-prevlink'
+ ),
+ $query,
+ array(
+ 'known',
+ 'noclasses'
+ )
+ );
+ # Make "next revision link"
+ $query['diff'] = 'next';
+ $query['oldid'] = $this->mNewid;
+
+ if( $this->mNewRev->isCurrent() ) {
+ $nextlink = ' ';
+ } else {
+ $nextlink = $sk->link(
+ $this->mTitle,
+ wfMsgHtml( 'nextdiff' ),
+ array(
+ 'id' => 'differences-nextlink'
+ ),
+ $query,
+ array(
+ 'known',
+ 'noclasses'
+ )
+ );
+ }
+
+ $oldminor = '';
+ $newminor = '';
+
+ if( $this->mOldRev->isMinor() ) {
+ $oldminor = ChangesList::flag( 'minor' );
+ }
+ if( $this->mNewRev->isMinor() ) {
+ $newminor = ChangesList::flag( 'minor' );
+ }
+
+ $rdel = ''; $ldel = '';
+ if( $wgUser->isAllowed( 'deletedhistory' ) ) {
+ // Don't show useless link to people who cannot hide revisions
+ if( $this->mOldRev->getVisibility() || $wgUser->isAllowed( 'deleterevision' ) ) {
+ if( !$this->mOldRev->userCan( Revision::DELETED_RESTRICTED ) ) {
+ // If revision was hidden from sysops
+ $ldel = Xml::tags( 'span', array( 'class' => 'mw-revdelundel-link' ),
+ '(' . wfMsgHtml( 'rev-delundel' ) . ')' );
+ } else {
+ $query = array(
+ 'type' => 'revision',
+ 'target' => $this->mOldRev->mTitle->getPrefixedDbkey(),
+ 'ids' => $this->mOldRev->getId()
+ );
+ $ldel = $sk->revDeleteLink( $query, $this->mOldRev->isDeleted( Revision::DELETED_RESTRICTED ) );
+ }
+ $ldel = " $ldel ";
+ }
+ // Don't show useless link to people who cannot hide revisions
+ if( $this->mNewRev->getVisibility() || $wgUser->isAllowed( 'deleterevision' ) ) {
+ if( !$this->mNewRev->userCan( Revision::DELETED_RESTRICTED ) ) {
+ // If revision was hidden from sysops
+ $rdel = Xml::tags( 'span', array( 'class'=>'mw-revdelundel-link' ), '('.wfMsgHtml( 'rev-delundel' ).')' );
+ } else {
+ $query = array(
+ 'type' => 'revision',
+ 'target' => $this->mNewRev->mTitle->getPrefixedDbkey(),
+ 'ids' => $this->mNewRev->getId()
+ );
+ $rdel = $sk->revDeleteLink( $query, $this->mNewRev->isDeleted( Revision::DELETED_RESTRICTED ) );
+ }
+ $rdel = " $rdel ";
+ }
+ }
+
+ $oldHeader = '<div id="mw-diff-otitle1"><strong>'.$this->mOldtitle.'</strong></div>' .
+ '<div id="mw-diff-otitle2">' . $sk->revUserTools( $this->mOldRev, !$this->unhide ) . "</div>" .
+ '<div id="mw-diff-otitle3">' . $oldminor . $sk->revComment( $this->mOldRev, !$diffOnly, !$this->unhide ).$ldel."</div>" .
+ '<div id="mw-diff-otitle4">' . $prevlink .'</div>';
+ $newHeader = '<div id="mw-diff-ntitle1"><strong>'.$this->mNewtitle.'</strong></div>' .
+ '<div id="mw-diff-ntitle2">' . $sk->revUserTools( $this->mNewRev, !$this->unhide ) . " $rollback</div>" .
+ '<div id="mw-diff-ntitle3">' . $newminor . $sk->revComment( $this->mNewRev, !$diffOnly, !$this->unhide ).$rdel."</div>" .
+ '<div id="mw-diff-ntitle4">' . $nextlink . $patrol . '</div>';
+
+ # Check if this user can see the revisions
+ $allowed = $this->mOldRev->userCan(Revision::DELETED_TEXT)
+ && $this->mNewRev->userCan(Revision::DELETED_TEXT);
+ # Check if one of the revisions is deleted/suppressed
+ $deleted = $suppressed = false;
+ if( $this->mOldRev->isDeleted(Revision::DELETED_TEXT) ) {
+ $deleted = true; // old revisions text is hidden
+ if( $this->mOldRev->isDeleted(Revision::DELETED_RESTRICTED) )
+ $suppressed = true; // also suppressed
+ }
+ if( $this->mNewRev->isDeleted(Revision::DELETED_TEXT) ) {
+ $deleted = true; // new revisions text is hidden
+ if( $this->mNewRev->isDeleted(Revision::DELETED_RESTRICTED) )
+ $suppressed = true; // also suppressed
+ }
+ # Output the diff if allowed...
+ if( $deleted && (!$this->unhide || !$allowed) ) {
+ $this->showDiffStyle();
+ $multi = $this->getMultiNotice();
+ $wgOut->addHTML( $this->addHeader( '', $oldHeader, $newHeader, $multi ) );
+ if( !$allowed ) {
+ # Give explanation for why revision is not visible
+ $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1</div>\n",
+ array( 'rev-deleted-no-diff' ) );
+ } else {
+ # Give explanation and add a link to view the diff...
+ $link = $this->mTitle->getFullUrl( array(
+ 'diff' => $this->mNewid,
+ 'oldid' => $this->mOldid,
+ 'unhide' => 1
+ ) );
+ $msg = $suppressed ? 'rev-suppressed-unhide-diff' : 'rev-deleted-unhide-diff';
+ $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1</div>\n", array( $msg, $link ) );
+ }
+ } else if( $wgEnableHtmlDiff && $this->htmldiff ) {
+ $multi = $this->getMultiNotice();
+ $wgOut->addHTML( '<div class="diff-switchtype">' . $sk->link(
+ $this->mTitle,
+ wfMsgHtml( 'wikicodecomparison' ),
+ array(
+ 'id' => 'differences-switchtype'
+ ),
+ array(
+ 'diff' => $this->mNewid,
+ 'oldid' => $this->mOldid,
+ 'htmldiff' => 0
+ ),
+ array(
+ 'known',
+ 'noclasses'
+ )
+ ) . '</div>');
+ $wgOut->addHTML( $this->addHeader( '', $oldHeader, $newHeader, $multi ) );
+ $this->renderHtmlDiff();
+ } else {
+ if( $wgEnableHtmlDiff ) {
+ $wgOut->addHTML( '<div class="diff-switchtype">' . $sk->link(
+ $this->mTitle,
+ wfMsgHtml( 'visualcomparison' ),
+ array(
+ 'id' => 'differences-switchtype'
+ ),
+ array(
+ 'diff' => $this->mNewid,
+ 'oldid' => $this->mOldid,
+ 'htmldiff' => 1
+ ),
+ array(
+ 'known',
+ 'noclasses'
+ )
+ ) . '</div>');
+ }
+ $this->showDiff( $oldHeader, $newHeader );
+ if( !$diffOnly ) {
+ $this->renderNewRevision();
+ }
+ }
+ wfProfileOut( __METHOD__ );
+ }
+
+ /**
+ * Show the new revision of the page.
+ */
+ function renderNewRevision() {
+ global $wgOut, $wgUser;
+ wfProfileIn( __METHOD__ );
+
+ $wgOut->addHTML( "<hr /><h2>{$this->mPagetitle}</h2>\n" );
+ # Add deleted rev tag if needed
+ if( !$this->mNewRev->userCan(Revision::DELETED_TEXT) ) {
+ $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1</div>\n", 'rev-deleted-text-permission' );
+ } else if( $this->mNewRev->isDeleted(Revision::DELETED_TEXT) ) {
+ $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1</div>\n", 'rev-deleted-text-view' );
+ }
+
+ if( !$this->mNewRev->isCurrent() ) {
+ $oldEditSectionSetting = $wgOut->parserOptions()->setEditSection( false );
+ }
+
+ $this->loadNewText();
+ if( is_object( $this->mNewRev ) ) {
+ $wgOut->setRevisionId( $this->mNewRev->getId() );
+ }
+
+ if( $this->mTitle->isCssJsSubpage() || $this->mTitle->isCssOrJsPage() ) {
+ // Stolen from Article::view --AG 2007-10-11
+ // Give hooks a chance to customise the output
+ if( wfRunHooks( 'ShowRawCssJs', array( $this->mNewtext, $this->mTitle, $wgOut ) ) ) {
+ // Wrap the whole lot in a <pre> and don't parse
+ $m = array();
+ preg_match( '!\.(css|js)$!u', $this->mTitle->getText(), $m );
+ $wgOut->addHTML( "<pre class=\"mw-code mw-{$m[1]}\" dir=\"ltr\">\n" );
+ $wgOut->addHTML( htmlspecialchars( $this->mNewtext ) );
+ $wgOut->addHTML( "\n</pre>\n" );
+ }
+ } else {
+ $wgOut->addWikiTextTidy( $this->mNewtext );
+ }
+
+ if( is_object( $this->mNewRev ) && !$this->mNewRev->isCurrent() ) {
+ $wgOut->parserOptions()->setEditSection( $oldEditSectionSetting );
+ }
+ # Add redundant patrol link on bottom...
+ if( $this->mRcidMarkPatrolled && $this->mTitle->quickUserCan('patrol') ) {
+ $sk = $wgUser->getSkin();
+ $wgOut->addHTML(
+ "<div class='patrollink'>[" . $sk->link(
+ $this->mTitle,
+ wfMsgHtml( 'markaspatrolleddiff' ),
+ array(),
+ array(
+ 'action' => 'markpatrolled',
+ 'rcid' => $this->mRcidMarkPatrolled
+ )
+ ) . ']</div>'
+ );
+ }
+
+ wfProfileOut( __METHOD__ );
+ }
+
+
+ function renderHtmlDiff() {
+ global $wgOut, $wgParser, $wgDebugComments;
+ wfProfileIn( __METHOD__ );
+
+ $this->showDiffStyle();
+
+ $wgOut->addHTML( '<h2>'.wfMsgHtml( 'visual-comparison' )."</h2>\n" );
+ #add deleted rev tag if needed
+ if( !$this->mNewRev->userCan(Revision::DELETED_TEXT) ) {
+ $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1</div>\n", 'rev-deleted-text-permission' );
+ } else if( $this->mNewRev->isDeleted(Revision::DELETED_TEXT) ) {
+ $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1</div>\n", 'rev-deleted-text-view' );
+ }
+
+ if( !$this->mNewRev->isCurrent() ) {
+ $oldEditSectionSetting = $wgOut->parserOptions()->setEditSection( false );
+ }
+
+ $this->loadText();
+
+ // Old revision
+ if( is_object( $this->mOldRev ) ) {
+ $wgOut->setRevisionId( $this->mOldRev->getId() );
+ }
+
+ $popts = $wgOut->parserOptions();
+ $oldTidy = $popts->setTidy( true );
+ $popts->setEditSection( false );
+
+ $parserOutput = $wgParser->parse( $this->mOldtext, $this->getTitle(), $popts, true, true, $wgOut->getRevisionId() );
+ $popts->setTidy( $oldTidy );
+
+ //only for new?
+ //$wgOut->addParserOutputNoText( $parserOutput );
+ $oldHtml = $parserOutput->getText();
+ wfRunHooks( 'OutputPageBeforeHTML', array( &$wgOut, &$oldHtml ) );
+
+ // New revision
+ if( is_object( $this->mNewRev ) ) {
+ $wgOut->setRevisionId( $this->mNewRev->getId() );
+ }
+
+ $popts = $wgOut->parserOptions();
+ $oldTidy = $popts->setTidy( true );
+
+ $parserOutput = $wgParser->parse( $this->mNewtext, $this->getTitle(), $popts, true, true, $wgOut->getRevisionId() );
+ $popts->setTidy( $oldTidy );
+
+ $wgOut->addParserOutputNoText( $parserOutput );
+ $newHtml = $parserOutput->getText();
+ wfRunHooks( 'OutputPageBeforeHTML', array( &$wgOut, &$newHtml ) );
+
+ unset($parserOutput, $popts);
+
+ $differ = new HTMLDiffer(new DelegatingContentHandler($wgOut));
+ $differ->htmlDiff($oldHtml, $newHtml);
+ if ( $wgDebugComments ) {
+ $wgOut->addHTML( "\n<!-- HtmlDiff Debug Output:\n" . HTMLDiffer::getDebugOutput() . " End Debug -->" );
+ }
+
+ wfProfileOut( __METHOD__ );
+ }
+
+ /**
+ * Show the first revision of an article. Uses normal diff headers in
+ * contrast to normal "old revision" display style.
+ */
+ function showFirstRevision() {
+ global $wgOut, $wgUser;
+ wfProfileIn( __METHOD__ );
+
+ # Get article text from the DB
+ #
+ if ( ! $this->loadNewText() ) {
+ $t = $this->mTitle->getPrefixedText();
+ $d = wfMsgExt( 'missingarticle-diff', array( 'escape' ), $this->mOldid, $this->mNewid );
+ $wgOut->setPagetitle( wfMsg( 'errorpagetitle' ) );
+ $wgOut->addWikiMsg( 'missing-article', "<nowiki>$t</nowiki>", $d );
+ wfProfileOut( __METHOD__ );
+ return;
+ }
+ if ( $this->mNewRev->isCurrent() ) {
+ $wgOut->setArticleFlag( true );
+ }
+
+ # Check if user is allowed to look at this page. If not, bail out.
+ #
+ if ( !$this->mTitle->userCanRead() ) {
+ $wgOut->loginToUse();
+ $wgOut->output();
+ wfProfileOut( __METHOD__ );
+ throw new MWException("Permission Error: you do not have access to view this page");
+ }
+
+ # Prepare the header box
+ #
+ $sk = $wgUser->getSkin();
+
+ $next = $this->mTitle->getNextRevisionID( $this->mNewid );
+ if( !$next ) {
+ $nextlink = '';
+ } else {
+ $nextlink = '<br/>' . $sk->link(
+ $this->mTitle,
+ wfMsgHtml( 'nextdiff' ),
+ array(
+ 'id' => 'differences-nextlink'
+ ),
+ array(
+ 'diff' => 'next',
+ 'oldid' => $this->mNewid,
+ $this->htmlDiffArgument()
+ ),
+ array(
+ 'known',
+ 'noclasses'
+ )
+ );
+ }
+ $header = "<div class=\"firstrevisionheader\" style=\"text-align: center\">" .
+ $sk->revUserTools( $this->mNewRev ) . "<br/>" . $sk->revComment( $this->mNewRev ) . $nextlink . "</div>\n";
+
+ $wgOut->addHTML( $header );
+
+ $wgOut->setSubtitle( wfMsgExt( 'difference', array( 'parseinline' ) ) );
+ $wgOut->setRobotPolicy( 'noindex,nofollow' );
+
+ wfProfileOut( __METHOD__ );
+ }
+
+ function htmlDiffArgument(){
+ global $wgEnableHtmlDiff;
+ if($wgEnableHtmlDiff){
+ if($this->htmldiff){
+ return array( 'htmldiff' => 1 );
+ }else{
+ return array( 'htmldiff' => 0 );
+ }
+ }else{
+ return array();
+ }
+ }
+
+ /**
+ * Get the diff text, send it to $wgOut
+ * Returns false if the diff could not be generated, otherwise returns true
+ */
+ function showDiff( $otitle, $ntitle ) {
+ global $wgOut;
+ $diff = $this->getDiff( $otitle, $ntitle );
+ if ( $diff === false ) {
+ $wgOut->addWikiMsg( 'missing-article', "<nowiki>(fixme, bug)</nowiki>", '' );
+ return false;
+ } else {
+ $this->showDiffStyle();
+ $wgOut->addHTML( $diff );
+ return true;
+ }
+ }
+
+ /**
+ * Add style sheets and supporting JS for diff display.
+ */
+ function showDiffStyle() {
+ global $wgStylePath, $wgStyleVersion, $wgOut;
+ $wgOut->addStyle( 'common/diff.css' );
+
+ // JS is needed to detect old versions of Mozilla to work around an annoyance bug.
+ $wgOut->addScript( "<script type=\"text/javascript\" src=\"$wgStylePath/common/diff.js?$wgStyleVersion\"></script>" );
+ }
+
+ /**
+ * Get complete diff table, including header
+ *
+ * @param Title $otitle Old title
+ * @param Title $ntitle New title
+ * @return mixed
+ */
+ function getDiff( $otitle, $ntitle ) {
+ $body = $this->getDiffBody();
+ if ( $body === false ) {
+ return false;
+ } else {
+ $multi = $this->getMultiNotice();
+ return $this->addHeader( $body, $otitle, $ntitle, $multi );
+ }
+ }
+
+ /**
+ * Get the diff table body, without header
+ *
+ * @return mixed
+ */
+ function getDiffBody() {
+ global $wgMemc;
+ wfProfileIn( __METHOD__ );
+ $this->mCacheHit = true;
+ // Check if the diff should be hidden from this user
+ if ( !$this->loadRevisionData() )
+ return '';
+ if ( $this->mOldRev && !$this->mOldRev->userCan(Revision::DELETED_TEXT) ) {
+ return '';
+ } else if ( $this->mNewRev && !$this->mNewRev->userCan(Revision::DELETED_TEXT) ) {
+ return '';
+ } else if ( $this->mOldRev && $this->mNewRev && $this->mOldRev->getID() == $this->mNewRev->getID() ) {
+ return '';
+ }
+ // Cacheable?
+ $key = false;
+ if ( $this->mOldid && $this->mNewid ) {
+ $key = wfMemcKey( 'diff', 'version', MW_DIFF_VERSION, 'oldid', $this->mOldid, 'newid', $this->mNewid );
+ // Try cache
+ if ( !$this->mRefreshCache ) {
+ $difftext = $wgMemc->get( $key );
+ if ( $difftext ) {
+ wfIncrStats( 'diff_cache_hit' );
+ $difftext = $this->localiseLineNumbers( $difftext );
+ $difftext .= "\n<!-- diff cache key $key -->\n";
+ wfProfileOut( __METHOD__ );
+ return $difftext;
+ }
+ } // don't try to load but save the result
+ }
+ $this->mCacheHit = false;
+
+ // Loadtext is permission safe, this just clears out the diff
+ if ( !$this->loadText() ) {
+ wfProfileOut( __METHOD__ );
+ return false;
+ }
+
+ $difftext = $this->generateDiffBody( $this->mOldtext, $this->mNewtext );
+
+ // Save to cache for 7 days
+ if ( !wfRunHooks( 'AbortDiffCache', array( &$this ) ) ) {
+ wfIncrStats( 'diff_uncacheable' );
+ } else if ( $key !== false && $difftext !== false ) {
+ wfIncrStats( 'diff_cache_miss' );
+ $wgMemc->set( $key, $difftext, 7*86400 );
+ } else {
+ wfIncrStats( 'diff_uncacheable' );
+ }
+ // Replace line numbers with the text in the user's language
+ if ( $difftext !== false ) {
+ $difftext = $this->localiseLineNumbers( $difftext );
+ }
+ wfProfileOut( __METHOD__ );
+ return $difftext;
+ }
+
+ /**
+ * Make sure the proper modules are loaded before we try to
+ * make the diff
+ */
+ private function initDiffEngines() {
+ global $wgExternalDiffEngine;
+ if ( $wgExternalDiffEngine == 'wikidiff' && !function_exists( 'wikidiff_do_diff' ) ) {
+ wfProfileIn( __METHOD__ . '-php_wikidiff.so' );
+ wfSuppressWarnings();
+ dl( 'php_wikidiff.so' );
+ wfRestoreWarnings();
+ wfProfileOut( __METHOD__ . '-php_wikidiff.so' );
+ }
+ else if ( $wgExternalDiffEngine == 'wikidiff2' && !function_exists( 'wikidiff2_do_diff' ) ) {
+ wfProfileIn( __METHOD__ . '-php_wikidiff2.so' );
+ wfSuppressWarnings();
+ dl( 'php_wikidiff2.so' );
+ wfRestoreWarnings();
+ wfProfileOut( __METHOD__ . '-php_wikidiff2.so' );
+ }
+ }
+
+ /**
+ * Generate a diff, no caching
+ * $otext and $ntext must be already segmented
+ */
+ function generateDiffBody( $otext, $ntext ) {
+ global $wgExternalDiffEngine, $wgContLang;
+
+ $otext = str_replace( "\r\n", "\n", $otext );
+ $ntext = str_replace( "\r\n", "\n", $ntext );
+
+ $this->initDiffEngines();
+
+ if ( $wgExternalDiffEngine == 'wikidiff' && function_exists( 'wikidiff_do_diff' ) ) {
+ # For historical reasons, external diff engine expects
+ # input text to be HTML-escaped already
+ $otext = htmlspecialchars ( $wgContLang->segmentForDiff( $otext ) );
+ $ntext = htmlspecialchars ( $wgContLang->segmentForDiff( $ntext ) );
+ return $wgContLang->unsegementForDiff( wikidiff_do_diff( $otext, $ntext, 2 ) ) .
+ $this->debug( 'wikidiff1' );
+ }
+
+ if ( $wgExternalDiffEngine == 'wikidiff2' && function_exists( 'wikidiff2_do_diff' ) ) {
+ # Better external diff engine, the 2 may some day be dropped
+ # This one does the escaping and segmenting itself
+ wfProfileIn( 'wikidiff2_do_diff' );
+ $text = wikidiff2_do_diff( $otext, $ntext, 2 );
+ $text .= $this->debug( 'wikidiff2' );
+ wfProfileOut( 'wikidiff2_do_diff' );
+ return $text;
+ }
+ if ( $wgExternalDiffEngine != 'wikidiff3' && $wgExternalDiffEngine !== false ) {
+ # Diff via the shell
+ global $wgTmpDirectory;
+ $tempName1 = tempnam( $wgTmpDirectory, 'diff_' );
+ $tempName2 = tempnam( $wgTmpDirectory, 'diff_' );
+
+ $tempFile1 = fopen( $tempName1, "w" );
+ if ( !$tempFile1 ) {
+ wfProfileOut( __METHOD__ );
+ return false;
+ }
+ $tempFile2 = fopen( $tempName2, "w" );
+ if ( !$tempFile2 ) {
+ wfProfileOut( __METHOD__ );
+ return false;
+ }
+ fwrite( $tempFile1, $otext );
+ fwrite( $tempFile2, $ntext );
+ fclose( $tempFile1 );
+ fclose( $tempFile2 );
+ $cmd = wfEscapeShellArg( $wgExternalDiffEngine, $tempName1, $tempName2 );
+ wfProfileIn( __METHOD__ . "-shellexec" );
+ $difftext = wfShellExec( $cmd );
+ $difftext .= $this->debug( "external $wgExternalDiffEngine" );
+ wfProfileOut( __METHOD__ . "-shellexec" );
+ unlink( $tempName1 );
+ unlink( $tempName2 );
+ return $difftext;
+ }
+
+ # Native PHP diff
+ $ota = explode( "\n", $wgContLang->segmentForDiff( $otext ) );
+ $nta = explode( "\n", $wgContLang->segmentForDiff( $ntext ) );
+ $diffs = new Diff( $ota, $nta );
+ $formatter = new TableDiffFormatter();
+ return $wgContLang->unsegmentForDiff( $formatter->format( $diffs ) ) .
+ $this->debug();
+ }
+
+ /**
+ * Generate a debug comment indicating diff generating time,
+ * server node, and generator backend.
+ */
+ protected function debug( $generator="internal" ) {
+ global $wgShowHostnames;
+ if ( !$this->enableDebugComment ) {
+ return '';
+ }
+ $data = array( $generator );
+ if( $wgShowHostnames ) {
+ $data[] = wfHostname();
+ }
+ $data[] = wfTimestamp( TS_DB );
+ return "<!-- diff generator: " .
+ implode( " ",
+ array_map(
+ "htmlspecialchars",
+ $data ) ) .
+ " -->\n";
+ }
+
+ /**
+ * Replace line numbers with the text in the user's language
+ */
+ function localiseLineNumbers( $text ) {
+ return preg_replace_callback( '/<!--LINE (\d+)-->/',
+ array( &$this, 'localiseLineNumbersCb' ), $text );
+ }
+
+ function localiseLineNumbersCb( $matches ) {
+ global $wgLang;
+ if ( $matches[1] === '1' && $this->mReducedLineNumbers ) return '';
+ return wfMsgExt( 'lineno', 'escape', $wgLang->formatNum( $matches[1] ) );
+ }
+
+
+ /**
+ * If there are revisions between the ones being compared, return a note saying so.
+ */
+ function getMultiNotice() {
+ if ( !is_object($this->mOldRev) || !is_object($this->mNewRev) )
+ return '';
+
+ if( !$this->mOldPage->equals( $this->mNewPage ) ) {
+ // Comparing two different pages? Count would be meaningless.
+ return '';
+ }
+
+ $oldid = $this->mOldRev->getId();
+ $newid = $this->mNewRev->getId();
+ if ( $oldid > $newid ) {
+ $tmp = $oldid; $oldid = $newid; $newid = $tmp;
+ }
+
+ $n = $this->mTitle->countRevisionsBetween( $oldid, $newid );
+ if ( !$n )
+ return '';
+
+ return wfMsgExt( 'diff-multi', array( 'parseinline' ), $n );
+ }
+
+
+ /**
+ * Add the header to a diff body
+ */
+ static function addHeader( $diff, $otitle, $ntitle, $multi = '' ) {
+ $colspan = 1;
+ $header = "<table class='diff'>";
+ if( $diff ) { // Safari/Chrome show broken output if cols not used
+ $header .= "
+ <col class='diff-marker' />
+ <col class='diff-content' />
+ <col class='diff-marker' />
+ <col class='diff-content' />";
+ $colspan = 2;
+ }
+ $header .= "
+ <tr valign='top'>
+ <td colspan='$colspan' class='diff-otitle'>{$otitle}</td>
+ <td colspan='$colspan' class='diff-ntitle'>{$ntitle}</td>
+ </tr>";
+
+ if ( $multi != '' )
+ $header .= "<tr><td colspan='4' align='center' class='diff-multi'>{$multi}</td></tr>";
+
+ return $header . $diff . "</table>";
+ }
+
+ /**
+ * Use specified text instead of loading from the database
+ */
+ function setText( $oldText, $newText ) {
+ $this->mOldtext = $oldText;
+ $this->mNewtext = $newText;
+ $this->mTextLoaded = 2;
+ $this->mRevisionsLoaded = true;
+ }
+
+ /**
+ * 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.
+ */
+ function loadRevisionData() {
+ global $wgLang, $wgUser;
+ if ( $this->mRevisionsLoaded ) {
+ return true;
+ } else {
+ // Whether it succeeds or fails, we don't want to try again
+ $this->mRevisionsLoaded = true;
+ }
+
+ // Load the new revision object
+ $this->mNewRev = $this->mNewid
+ ? Revision::newFromId( $this->mNewid )
+ : Revision::newFromTitle( $this->mTitle );
+ if( !$this->mNewRev instanceof Revision )
+ return false;
+
+ // Update the new revision ID in case it was 0 (makes life easier doing UI stuff)
+ $this->mNewid = $this->mNewRev->getId();
+
+ // Check if page is editable
+ $editable = $this->mNewRev->getTitle()->userCan( 'edit' );
+
+ // Set assorted variables
+ $timestamp = $wgLang->timeanddate( $this->mNewRev->getTimestamp(), true );
+ $dateofrev = $wgLang->date( $this->mNewRev->getTimestamp(), true );
+ $timeofrev = $wgLang->time( $this->mNewRev->getTimestamp(), true );
+ $this->mNewPage = $this->mNewRev->getTitle();
+ if( $this->mNewRev->isCurrent() ) {
+ $newLink = $this->mNewPage->escapeLocalUrl( array(
+ 'oldid' => $this->mNewid
+ ) );
+ $this->mPagetitle = htmlspecialchars( wfMsg(
+ 'currentrev-asof',
+ $timestamp,
+ $dateofrev,
+ $timeofrev
+ ) );
+ $newEdit = $this->mNewPage->escapeLocalUrl( array(
+ 'action' => 'edit'
+ ) );
+
+ $this->mNewtitle = "<a href='$newLink'>{$this->mPagetitle}</a>";
+ $this->mNewtitle .= " (<a href='$newEdit'>" . wfMsgHtml( $editable ? 'editold' : 'viewsourceold' ) . "</a>)";
+ } else {
+ $newLink = $this->mNewPage->escapeLocalUrl( array(
+ 'oldid' => $this->mNewid
+ ) );
+ $newEdit = $this->mNewPage->escapeLocalUrl( array(
+ 'action' => 'edit',
+ 'oldid' => $this->mNewid
+ ) );
+ $this->mPagetitle = htmlspecialchars( wfMsg(
+ 'revisionasof',
+ $timestamp,
+ $dateofrev,
+ $timeofrev
+ ) );
+
+ $this->mNewtitle = "<a href='$newLink'>{$this->mPagetitle}</a>";
+ $this->mNewtitle .= " (<a href='$newEdit'>" . wfMsgHtml( $editable ? 'editold' : 'viewsourceold' ) . "</a>)";
+ }
+ if( !$this->mNewRev->userCan(Revision::DELETED_TEXT) ) {
+ $this->mNewtitle = "<span class='history-deleted'>{$this->mPagetitle}</span>";
+ } else if ( $this->mNewRev->isDeleted(Revision::DELETED_TEXT) ) {
+ $this->mNewtitle = "<span class='history-deleted'>{$this->mNewtitle}</span>";
+ }
+
+ // Load the old revision object
+ $this->mOldRev = false;
+ if( $this->mOldid ) {
+ $this->mOldRev = Revision::newFromId( $this->mOldid );
+ } elseif ( $this->mOldid === 0 ) {
+ $rev = $this->mNewRev->getPrevious();
+ if( $rev ) {
+ $this->mOldid = $rev->getId();
+ $this->mOldRev = $rev;
+ } else {
+ // No previous revision; mark to show as first-version only.
+ $this->mOldid = false;
+ $this->mOldRev = false;
+ }
+ }/* elseif ( $this->mOldid === false ) leave mOldRev false; */
+
+ if( is_null( $this->mOldRev ) ) {
+ return false;
+ }
+
+ if ( $this->mOldRev ) {
+ $this->mOldPage = $this->mOldRev->getTitle();
+
+ $t = $wgLang->timeanddate( $this->mOldRev->getTimestamp(), true );
+ $dateofrev = $wgLang->date( $this->mOldRev->getTimestamp(), true );
+ $timeofrev = $wgLang->time( $this->mOldRev->getTimestamp(), true );
+ $oldLink = $this->mOldPage->escapeLocalUrl( array(
+ 'oldid' => $this->mOldid
+ ) );
+ $oldEdit = $this->mOldPage->escapeLocalUrl( array(
+ 'action' => 'edit',
+ 'oldid' => $this->mOldid
+ ) );
+ $this->mOldPagetitle = htmlspecialchars( wfMsg( 'revisionasof', $t, $dateofrev, $timeofrev ) );
+
+ $this->mOldtitle = "<a href='$oldLink'>{$this->mOldPagetitle}</a>"
+ . " (<a href='$oldEdit'>" . wfMsgHtml( $editable ? 'editold' : 'viewsourceold' ) . "</a>)";
+ // Add an "undo" link
+ $newUndo = $this->mNewPage->escapeLocalUrl( array(
+ 'action' => 'edit',
+ 'undoafter' => $this->mOldid,
+ 'undo' => $this->mNewid
+ ) );
+ $htmlLink = htmlspecialchars( wfMsg( 'editundo' ) );
+ $htmlTitle = $wgUser->getSkin()->tooltip( 'undo' );
+ if( $editable && !$this->mOldRev->isDeleted( Revision::DELETED_TEXT ) && !$this->mNewRev->isDeleted( Revision::DELETED_TEXT ) ) {
+ $this->mNewtitle .= " (<a href='$newUndo' $htmlTitle>" . $htmlLink . "</a>)";
+ }
+
+ if( !$this->mOldRev->userCan( Revision::DELETED_TEXT ) ) {
+ $this->mOldtitle = '<span class="history-deleted">' . $this->mOldPagetitle . '</span>';
+ } else if( $this->mOldRev->isDeleted( Revision::DELETED_TEXT ) ) {
+ $this->mOldtitle = '<span class="history-deleted">' . $this->mOldtitle . '</span>';
+ }
+ }
+
+ return true;
+ }
+
+ /**
+ * Load the text of the revisions, as well as revision data.
+ */
+ function loadText() {
+ if ( $this->mTextLoaded == 2 ) {
+ return true;
+ } else {
+ // Whether it succeeds or fails, we don't want to try again
+ $this->mTextLoaded = 2;
+ }
+
+ if ( !$this->loadRevisionData() ) {
+ return false;
+ }
+ if ( $this->mOldRev ) {
+ $this->mOldtext = $this->mOldRev->getText( Revision::FOR_THIS_USER );
+ if ( $this->mOldtext === false ) {
+ return false;
+ }
+ }
+ if ( $this->mNewRev ) {
+ $this->mNewtext = $this->mNewRev->getText( Revision::FOR_THIS_USER );
+ if ( $this->mNewtext === false ) {
+ return false;
+ }
+ }
+ return true;
+ }
+
+ /**
+ * Load the text of the new revision, not the old one
+ */
+ function loadNewText() {
+ if ( $this->mTextLoaded >= 1 ) {
+ return true;
+ } else {
+ $this->mTextLoaded = 1;
+ }
+ if ( !$this->loadRevisionData() ) {
+ return false;
+ }
+ $this->mNewtext = $this->mNewRev->getText( Revision::FOR_THIS_USER );
+ return true;
+ }
+}
dépôts / lhc / web / wiklou.git / commitdiff