mirror of
https://github.com/YunoHost-Apps/mediawiki_ynh.git
synced 2024-09-03 19:46:05 +02:00
1214 lines
37 KiB
PHP
1214 lines
37 KiB
PHP
<?php
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/**
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* User interface for the difference engine.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* http://www.gnu.org/copyleft/gpl.html
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*
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* @file
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* @ingroup DifferenceEngine
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*/
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/**
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* Constant to indicate diff cache compatibility.
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* Bump this when changing the diff formatting in a way that
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* fixes important bugs or such to force cached diff views to
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* clear.
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*/
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define( 'MW_DIFF_VERSION', '1.11a' );
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/**
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* @todo document
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* @ingroup DifferenceEngine
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*/
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class DifferenceEngine extends ContextSource {
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/**#@+
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* @private
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*/
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var $mOldid, $mNewid;
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var $mOldTags, $mNewTags;
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/**
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* @var Content
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*/
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var $mOldContent, $mNewContent;
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protected $mDiffLang;
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/**
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* @var Title
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*/
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var $mOldPage, $mNewPage;
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/**
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* @var Revision
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*/
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var $mOldRev, $mNewRev;
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private $mRevisionsIdsLoaded = false; // Have the revisions IDs been loaded
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var $mRevisionsLoaded = false; // Have the revisions been loaded
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var $mTextLoaded = 0; // How many text blobs have been loaded, 0, 1 or 2?
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var $mCacheHit = false; // Was the diff fetched from cache?
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/**
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* Set this to true to add debug info to the HTML output.
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* Warning: this may cause RSS readers to spuriously mark articles as "new"
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* (bug 20601)
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*/
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var $enableDebugComment = false;
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// If true, line X is not displayed when X is 1, for example to increase
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// readability and conserve space with many small diffs.
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protected $mReducedLineNumbers = false;
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// Link to action=markpatrolled
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protected $mMarkPatrolledLink = null;
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protected $unhide = false; # show rev_deleted content if allowed
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/**#@-*/
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/**
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* Constructor
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* @param $context IContextSource context to use, anything else will be ignored
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* @param $old Integer old ID we want to show and diff with.
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* @param $new String either 'prev' or 'next'.
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* @param $rcid Integer Deprecated, no longer used!
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* @param $refreshCache boolean If set, refreshes the diff cache
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* @param $unhide boolean If set, allow viewing deleted revs
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*/
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function __construct( $context = null, $old = 0, $new = 0, $rcid = 0,
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$refreshCache = false, $unhide = false )
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{
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if ( $context instanceof IContextSource ) {
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$this->setContext( $context );
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}
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wfDebug( "DifferenceEngine old '$old' new '$new' rcid '$rcid'\n" );
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$this->mOldid = $old;
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$this->mNewid = $new;
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$this->mRefreshCache = $refreshCache;
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$this->unhide = $unhide;
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}
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/**
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* @param $value bool
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*/
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function setReducedLineNumbers( $value = true ) {
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$this->mReducedLineNumbers = $value;
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}
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/**
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* @return Language
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*/
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function getDiffLang() {
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if ( $this->mDiffLang === null ) {
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# Default language in which the diff text is written.
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$this->mDiffLang = $this->getTitle()->getPageLanguage();
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}
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return $this->mDiffLang;
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}
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/**
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* @return bool
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*/
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function wasCacheHit() {
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return $this->mCacheHit;
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}
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/**
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* @return int
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*/
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function getOldid() {
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$this->loadRevisionIds();
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return $this->mOldid;
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}
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/**
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* @return Bool|int
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*/
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function getNewid() {
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$this->loadRevisionIds();
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return $this->mNewid;
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}
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/**
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* Look up a special:Undelete link to the given deleted revision id,
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* as a workaround for being unable to load deleted diffs in currently.
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*
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* @param int $id revision ID
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* @return mixed URL or false
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*/
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function deletedLink( $id ) {
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if ( $this->getUser()->isAllowed( 'deletedhistory' ) ) {
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$dbr = wfGetDB( DB_SLAVE );
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$row = $dbr->selectRow( 'archive', '*',
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array( 'ar_rev_id' => $id ),
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__METHOD__ );
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if ( $row ) {
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$rev = Revision::newFromArchiveRow( $row );
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$title = Title::makeTitleSafe( $row->ar_namespace, $row->ar_title );
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return SpecialPage::getTitleFor( 'Undelete' )->getFullURL( array(
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'target' => $title->getPrefixedText(),
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'timestamp' => $rev->getTimestamp()
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));
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}
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}
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return false;
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}
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/**
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* Build a wikitext link toward a deleted revision, if viewable.
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*
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* @param int $id revision ID
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* @return string wikitext fragment
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*/
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function deletedIdMarker( $id ) {
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$link = $this->deletedLink( $id );
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if ( $link ) {
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return "[$link $id]";
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} else {
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return $id;
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}
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}
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private function showMissingRevision() {
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$out = $this->getOutput();
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$missing = array();
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if ( $this->mOldRev === null ||
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( $this->mOldRev && $this->mOldContent === null )
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) {
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$missing[] = $this->deletedIdMarker( $this->mOldid );
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}
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if ( $this->mNewRev === null ||
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( $this->mNewRev && $this->mNewContent === null )
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) {
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$missing[] = $this->deletedIdMarker( $this->mNewid );
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}
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$out->setPageTitle( $this->msg( 'errorpagetitle' ) );
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$out->addWikiMsg( 'difference-missing-revision',
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$this->getLanguage()->listToText( $missing ), count( $missing ) );
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}
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function showDiffPage( $diffOnly = false ) {
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wfProfileIn( __METHOD__ );
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# Allow frames except in certain special cases
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$out = $this->getOutput();
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$out->allowClickjacking();
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$out->setRobotPolicy( 'noindex,nofollow' );
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if ( !$this->loadRevisionData() ) {
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$this->showMissingRevision();
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wfProfileOut( __METHOD__ );
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return;
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}
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$user = $this->getUser();
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$permErrors = $this->mNewPage->getUserPermissionsErrors( 'read', $user );
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if ( $this->mOldPage ) { # mOldPage might not be set, see below.
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$permErrors = wfMergeErrorArrays( $permErrors,
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$this->mOldPage->getUserPermissionsErrors( 'read', $user ) );
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}
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if ( count( $permErrors ) ) {
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wfProfileOut( __METHOD__ );
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throw new PermissionsError( 'read', $permErrors );
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}
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$rollback = '';
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$undoLink = '';
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$query = array();
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# Carry over 'diffonly' param via navigation links
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if ( $diffOnly != $user->getBoolOption( 'diffonly' ) ) {
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$query['diffonly'] = $diffOnly;
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}
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# Cascade unhide param in links for easy deletion browsing
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if ( $this->unhide ) {
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$query['unhide'] = 1;
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}
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# Check if one of the revisions is deleted/suppressed
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$deleted = $suppressed = false;
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$allowed = $this->mNewRev->userCan( Revision::DELETED_TEXT, $user );
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$revisionTools = array();
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# mOldRev is false if the difference engine is called with a "vague" query for
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# a diff between a version V and its previous version V' AND the version V
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# is the first version of that article. In that case, V' does not exist.
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if ( $this->mOldRev === false ) {
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$out->setPageTitle( $this->msg( 'difference-title', $this->mNewPage->getPrefixedText() ) );
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$samePage = true;
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$oldHeader = '';
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} else {
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wfRunHooks( 'DiffViewHeader', array( $this, $this->mOldRev, $this->mNewRev ) );
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if ( $this->mNewPage->equals( $this->mOldPage ) ) {
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$out->setPageTitle( $this->msg( 'difference-title', $this->mNewPage->getPrefixedText() ) );
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$samePage = true;
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} else {
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$out->setPageTitle( $this->msg( 'difference-title-multipage', $this->mOldPage->getPrefixedText(),
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$this->mNewPage->getPrefixedText() ) );
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$out->addSubtitle( $this->msg( 'difference-multipage' ) );
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$samePage = false;
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}
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if ( $samePage && $this->mNewPage->quickUserCan( 'edit', $user ) ) {
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if ( $this->mNewRev->isCurrent() && $this->mNewPage->userCan( 'rollback', $user ) ) {
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$rollbackLink = Linker::generateRollback( $this->mNewRev, $this->getContext() );
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if ( $rollbackLink ) {
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$out->preventClickjacking();
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$rollback = '   ' . $rollbackLink;
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}
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}
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if ( !$this->mOldRev->isDeleted( Revision::DELETED_TEXT ) && !$this->mNewRev->isDeleted( Revision::DELETED_TEXT ) ) {
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$undoLink = Html::element( 'a', array(
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'href' => $this->mNewPage->getLocalURL( array(
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'action' => 'edit',
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'undoafter' => $this->mOldid,
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'undo' => $this->mNewid ) ),
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'title' => Linker::titleAttrib( 'undo' )
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),
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$this->msg( 'editundo' )->text()
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);
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$revisionTools[] = $undoLink;
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}
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}
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# Make "previous revision link"
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if ( $samePage && $this->mOldRev->getPrevious() ) {
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$prevlink = Linker::linkKnown(
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$this->mOldPage,
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$this->msg( 'previousdiff' )->escaped(),
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array( 'id' => 'differences-prevlink' ),
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array( 'diff' => 'prev', 'oldid' => $this->mOldid ) + $query
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);
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} else {
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$prevlink = ' ';
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}
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if ( $this->mOldRev->isMinor() ) {
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$oldminor = ChangesList::flag( 'minor' );
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} else {
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$oldminor = '';
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}
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$ldel = $this->revisionDeleteLink( $this->mOldRev );
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$oldRevisionHeader = $this->getRevisionHeader( $this->mOldRev, 'complete' );
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$oldChangeTags = ChangeTags::formatSummaryRow( $this->mOldTags, 'diff' );
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$oldHeader = '<div id="mw-diff-otitle1"><strong>' . $oldRevisionHeader . '</strong></div>' .
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'<div id="mw-diff-otitle2">' .
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Linker::revUserTools( $this->mOldRev, !$this->unhide ) . '</div>' .
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'<div id="mw-diff-otitle3">' . $oldminor .
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Linker::revComment( $this->mOldRev, !$diffOnly, !$this->unhide ) . $ldel . '</div>' .
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'<div id="mw-diff-otitle5">' . $oldChangeTags[0] . '</div>' .
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'<div id="mw-diff-otitle4">' . $prevlink . '</div>';
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if ( $this->mOldRev->isDeleted( Revision::DELETED_TEXT ) ) {
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$deleted = true; // old revisions text is hidden
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if ( $this->mOldRev->isDeleted( Revision::DELETED_RESTRICTED ) ) {
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$suppressed = true; // also suppressed
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}
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}
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# Check if this user can see the revisions
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if ( !$this->mOldRev->userCan( Revision::DELETED_TEXT, $user ) ) {
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$allowed = false;
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}
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}
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# Make "next revision link"
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# Skip next link on the top revision
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if ( $samePage && !$this->mNewRev->isCurrent() ) {
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$nextlink = Linker::linkKnown(
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$this->mNewPage,
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$this->msg( 'nextdiff' )->escaped(),
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array( 'id' => 'differences-nextlink' ),
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array( 'diff' => 'next', 'oldid' => $this->mNewid ) + $query
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);
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} else {
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$nextlink = ' ';
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}
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if ( $this->mNewRev->isMinor() ) {
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$newminor = ChangesList::flag( 'minor' );
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} else {
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$newminor = '';
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}
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# Handle RevisionDelete links...
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$rdel = $this->revisionDeleteLink( $this->mNewRev );
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# Allow extensions to define their own revision tools
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wfRunHooks( 'DiffRevisionTools', array( $this->mNewRev, &$revisionTools ) );
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$formattedRevisionTools = array();
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// Put each one in parentheses (poor man's button)
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foreach ( $revisionTools as $tool ) {
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$formattedRevisionTools[] = $this->msg( 'parentheses' )->rawParams( $tool )->escaped();
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}
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$newRevisionHeader = $this->getRevisionHeader( $this->mNewRev, 'complete' ) . ' ' . implode( ' ', $formattedRevisionTools );
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$newChangeTags = ChangeTags::formatSummaryRow( $this->mNewTags, 'diff' );
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$newHeader = '<div id="mw-diff-ntitle1"><strong>' . $newRevisionHeader . '</strong></div>' .
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'<div id="mw-diff-ntitle2">' . Linker::revUserTools( $this->mNewRev, !$this->unhide ) .
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" $rollback</div>" .
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'<div id="mw-diff-ntitle3">' . $newminor .
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Linker::revComment( $this->mNewRev, !$diffOnly, !$this->unhide ) . $rdel . '</div>' .
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'<div id="mw-diff-ntitle5">' . $newChangeTags[0] . '</div>' .
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'<div id="mw-diff-ntitle4">' . $nextlink . $this->markPatrolledLink() . '</div>';
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if ( $this->mNewRev->isDeleted( Revision::DELETED_TEXT ) ) {
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$deleted = true; // new revisions text is hidden
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if ( $this->mNewRev->isDeleted( Revision::DELETED_RESTRICTED ) ) {
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$suppressed = true; // also suppressed
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}
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}
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# If the diff cannot be shown due to a deleted revision, then output
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# the diff header and links to unhide (if available)...
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if ( $deleted && ( !$this->unhide || !$allowed ) ) {
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$this->showDiffStyle();
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$multi = $this->getMultiNotice();
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$out->addHTML( $this->addHeader( '', $oldHeader, $newHeader, $multi ) );
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if ( !$allowed ) {
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$msg = $suppressed ? 'rev-suppressed-no-diff' : 'rev-deleted-no-diff';
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# Give explanation for why revision is not visible
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$out->wrapWikiMsg( "<div id='mw-$msg' class='mw-warning plainlinks'>\n$1\n</div>\n",
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array( $msg ) );
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} else {
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# Give explanation and add a link to view the diff...
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$link = $this->getTitle()->getFullURL( $this->getRequest()->appendQueryValue( 'unhide', '1', true ) );
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$msg = $suppressed ? 'rev-suppressed-unhide-diff' : 'rev-deleted-unhide-diff';
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$out->wrapWikiMsg( "<div id='mw-$msg' class='mw-warning plainlinks'>\n$1\n</div>\n", array( $msg, $link ) );
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}
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# Otherwise, output a regular diff...
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} else {
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# Add deletion notice if the user is viewing deleted content
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$notice = '';
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if ( $deleted ) {
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$msg = $suppressed ? 'rev-suppressed-diff-view' : 'rev-deleted-diff-view';
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$notice = "<div id='mw-$msg' class='mw-warning plainlinks'>\n" . $this->msg( $msg )->parse() . "</div>\n";
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}
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$this->showDiff( $oldHeader, $newHeader, $notice );
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if ( !$diffOnly ) {
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$this->renderNewRevision();
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}
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}
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wfProfileOut( __METHOD__ );
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}
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/**
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* Get a link to mark the change as patrolled, or '' if there's either no
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* revision to patrol or the user is not allowed to to it.
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* Side effect: When the patrol link is build, this method will call
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* OutputPage::preventClickjacking() and load mediawiki.page.patrol.ajax.
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*
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* @return String
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*/
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protected function markPatrolledLink() {
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global $wgUseRCPatrol, $wgEnableAPI, $wgEnableWriteAPI;
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$user = $this->getUser();
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if ( $this->mMarkPatrolledLink === null ) {
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// Prepare a change patrol link, if applicable
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if (
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// Is patrolling enabled and the user allowed to?
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$wgUseRCPatrol && $this->mNewPage->quickUserCan( 'patrol', $user ) &&
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// Only do this if the revision isn't more than 6 hours older
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|
// than the Max RC age (6h because the RC might not be cleaned out regularly)
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RecentChange::isInRCLifespan( $this->mNewRev->getTimestamp(), 21600 )
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) {
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// Look for an unpatrolled change corresponding to this diff
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|
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$db = wfGetDB( DB_SLAVE );
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$change = RecentChange::newFromConds(
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array(
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'rc_timestamp' => $db->timestamp( $this->mNewRev->getTimestamp() ),
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'rc_this_oldid' => $this->mNewid,
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'rc_patrolled' => 0
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),
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__METHOD__,
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array( 'USE INDEX' => 'rc_timestamp' )
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);
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if ( $change && $change->getPerformer()->getName() !== $user->getName() ) {
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$rcid = $change->getAttribute( 'rc_id' );
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} else {
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// None found or the page has been created by the current user.
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// If the user could patrol this it already would be patrolled
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$rcid = 0;
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}
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// Build the link
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|
if ( $rcid ) {
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$this->getOutput()->preventClickjacking();
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if ( $wgEnableAPI && $wgEnableWriteAPI
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&& $user->isAllowed( 'writeapi' )
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) {
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$this->getOutput()->addModules( 'mediawiki.page.patrol.ajax' );
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}
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$token = $user->getEditToken( $rcid );
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$this->mMarkPatrolledLink = ' <span class="patrollink">[' . Linker::linkKnown(
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$this->mNewPage,
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$this->msg( 'markaspatrolleddiff' )->escaped(),
|
|
array(),
|
|
array(
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'action' => 'markpatrolled',
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|
'rcid' => $rcid,
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'token' => $token,
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)
|
|
) . ']</span>';
|
|
} else {
|
|
$this->mMarkPatrolledLink = '';
|
|
}
|
|
} else {
|
|
$this->mMarkPatrolledLink = '';
|
|
}
|
|
}
|
|
|
|
return $this->mMarkPatrolledLink;
|
|
}
|
|
|
|
/**
|
|
* @param $rev Revision
|
|
* @return String
|
|
*/
|
|
protected function revisionDeleteLink( $rev ) {
|
|
$link = Linker::getRevDeleteLink( $this->getUser(), $rev, $rev->getTitle() );
|
|
if ( $link !== '' ) {
|
|
$link = '   ' . $link . ' ';
|
|
}
|
|
return $link;
|
|
}
|
|
|
|
/**
|
|
* Show the new revision of the page.
|
|
*/
|
|
function renderNewRevision() {
|
|
wfProfileIn( __METHOD__ );
|
|
$out = $this->getOutput();
|
|
$revHeader = $this->getRevisionHeader( $this->mNewRev );
|
|
# Add "current version as of X" title
|
|
$out->addHTML( "<hr class='diff-hr' />
|
|
<h2 class='diff-currentversion-title'>{$revHeader}</h2>\n" );
|
|
# Page content may be handled by a hooked call instead...
|
|
if ( wfRunHooks( 'ArticleContentOnDiff', array( $this, $out ) ) ) {
|
|
$this->loadNewText();
|
|
$out->setRevisionId( $this->mNewid );
|
|
$out->setRevisionTimestamp( $this->mNewRev->getTimestamp() );
|
|
$out->setArticleFlag( true );
|
|
|
|
// NOTE: only needed for B/C: custom rendering of JS/CSS via hook
|
|
if ( $this->mNewPage->isCssJsSubpage() || $this->mNewPage->isCssOrJsPage() ) {
|
|
// Stolen from Article::view --AG 2007-10-11
|
|
// Give hooks a chance to customise the output
|
|
// @todo standardize this crap into one function
|
|
if ( ContentHandler::runLegacyHooks( 'ShowRawCssJs', array( $this->mNewContent, $this->mNewPage, $out ) ) ) {
|
|
// NOTE: deprecated hook, B/C only
|
|
// use the content object's own rendering
|
|
$cnt = $this->mNewRev->getContent();
|
|
$po = $cnt ? $cnt->getParserOutput( $this->mNewRev->getTitle(), $this->mNewRev->getId() ) : null;
|
|
$txt = $po ? $po->getText() : '';
|
|
$out->addHTML( $txt );
|
|
}
|
|
} elseif ( !wfRunHooks( 'ArticleContentViewCustom', array( $this->mNewContent, $this->mNewPage, $out ) ) ) {
|
|
// Handled by extension
|
|
} elseif ( !ContentHandler::runLegacyHooks( 'ArticleViewCustom', array( $this->mNewContent, $this->mNewPage, $out ) ) ) {
|
|
// NOTE: deprecated hook, B/C only
|
|
// Handled by extension
|
|
} else {
|
|
// Normal page
|
|
if ( $this->getTitle()->equals( $this->mNewPage ) ) {
|
|
// If the Title stored in the context is the same as the one
|
|
// of the new revision, we can use its associated WikiPage
|
|
// object.
|
|
$wikiPage = $this->getWikiPage();
|
|
} else {
|
|
// Otherwise we need to create our own WikiPage object
|
|
$wikiPage = WikiPage::factory( $this->mNewPage );
|
|
}
|
|
|
|
$parserOutput = $this->getParserOutput( $wikiPage, $this->mNewRev );
|
|
|
|
# Also try to load it as a redirect
|
|
$rt = $this->mNewContent ? $this->mNewContent->getRedirectTarget() : null;
|
|
|
|
if ( $rt ) {
|
|
$article = Article::newFromTitle( $this->mNewPage, $this->getContext() );
|
|
$out->addHTML( $article->viewRedirect( $rt ) );
|
|
|
|
# WikiPage::getParserOutput() should not return false, but just in case
|
|
if ( $parserOutput ) {
|
|
# Show categories etc.
|
|
$out->addParserOutputNoText( $parserOutput );
|
|
}
|
|
} elseif ( $parserOutput ) {
|
|
$out->addParserOutput( $parserOutput );
|
|
}
|
|
}
|
|
}
|
|
# Add redundant patrol link on bottom...
|
|
$out->addHTML( $this->markPatrolledLink() );
|
|
|
|
wfProfileOut( __METHOD__ );
|
|
}
|
|
|
|
protected function getParserOutput( WikiPage $page, Revision $rev ) {
|
|
$parserOptions = $page->makeParserOptions( $this->getContext() );
|
|
|
|
if ( !$rev->isCurrent() || !$rev->getTitle()->quickUserCan( "edit" ) ) {
|
|
$parserOptions->setEditSection( false );
|
|
}
|
|
|
|
$parserOutput = $page->getParserOutput( $parserOptions, $rev->getId() );
|
|
return $parserOutput;
|
|
}
|
|
|
|
/**
|
|
* Get the diff text, send it to the OutputPage object
|
|
* Returns false if the diff could not be generated, otherwise returns true
|
|
*
|
|
* @return bool
|
|
*/
|
|
function showDiff( $otitle, $ntitle, $notice = '' ) {
|
|
$diff = $this->getDiff( $otitle, $ntitle, $notice );
|
|
if ( $diff === false ) {
|
|
$this->showMissingRevision();
|
|
return false;
|
|
} else {
|
|
$this->showDiffStyle();
|
|
$this->getOutput()->addHTML( $diff );
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Add style sheets and supporting JS for diff display.
|
|
*/
|
|
function showDiffStyle() {
|
|
$this->getOutput()->addModuleStyles( 'mediawiki.action.history.diff' );
|
|
}
|
|
|
|
/**
|
|
* Get complete diff table, including header
|
|
*
|
|
* @param string|bool $otitle Header for old text or false
|
|
* @param string|bool $ntitle Header for new text or false
|
|
* @param string $notice HTML between diff header and body
|
|
* @return mixed
|
|
*/
|
|
function getDiff( $otitle, $ntitle, $notice = '' ) {
|
|
$body = $this->getDiffBody();
|
|
if ( $body === false ) {
|
|
return false;
|
|
} else {
|
|
$multi = $this->getMultiNotice();
|
|
// Display a message when the diff is empty
|
|
if ( $body === '' ) {
|
|
$notice .= '<div class="mw-diff-empty">' . $this->msg( 'diff-empty' )->parse() . "</div>\n";
|
|
}
|
|
return $this->addHeader( $body, $otitle, $ntitle, $multi, $notice );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get the diff table body, without header
|
|
*
|
|
* @return mixed (string/false)
|
|
*/
|
|
public function getDiffBody() {
|
|
global $wgMemc;
|
|
wfProfileIn( __METHOD__ );
|
|
$this->mCacheHit = true;
|
|
// Check if the diff should be hidden from this user
|
|
if ( !$this->loadRevisionData() ) {
|
|
wfProfileOut( __METHOD__ );
|
|
return false;
|
|
} elseif ( $this->mOldRev && !$this->mOldRev->userCan( Revision::DELETED_TEXT, $this->getUser() ) ) {
|
|
wfProfileOut( __METHOD__ );
|
|
return false;
|
|
} elseif ( $this->mNewRev && !$this->mNewRev->userCan( Revision::DELETED_TEXT, $this->getUser() ) ) {
|
|
wfProfileOut( __METHOD__ );
|
|
return false;
|
|
}
|
|
// Short-circuit
|
|
if ( $this->mOldRev === false || ( $this->mOldRev && $this->mNewRev
|
|
&& $this->mOldRev->getID() == $this->mNewRev->getID() ) )
|
|
{
|
|
wfProfileOut( __METHOD__ );
|
|
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->generateContentDiffBody( $this->mOldContent, $this->mNewContent );
|
|
|
|
// Save to cache for 7 days
|
|
if ( !wfRunHooks( 'AbortDiffCache', array( &$this ) ) ) {
|
|
wfIncrStats( 'diff_uncacheable' );
|
|
} elseif ( $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;
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* @param $old Content: old content
|
|
* @param $new Content: new content
|
|
*
|
|
* @return bool|string
|
|
* @since 1.21
|
|
* @throws MWException if $old or $new are not instances of TextContent.
|
|
*/
|
|
function generateContentDiffBody( Content $old, Content $new ) {
|
|
if ( !( $old instanceof TextContent ) ) {
|
|
throw new MWException( "Diff not implemented for " . get_class( $old ) . "; "
|
|
. "override generateContentDiffBody to fix this." );
|
|
}
|
|
|
|
if ( !( $new instanceof TextContent ) ) {
|
|
throw new MWException( "Diff not implemented for " . get_class( $new ) . "; "
|
|
. "override generateContentDiffBody to fix this." );
|
|
}
|
|
|
|
$otext = $old->serialize();
|
|
$ntext = $new->serialize();
|
|
|
|
return $this->generateTextDiffBody( $otext, $ntext );
|
|
}
|
|
|
|
/**
|
|
* Generate a diff, no caching
|
|
*
|
|
* @param string $otext old text, must be already segmented
|
|
* @param string $ntext new text, must be already segmented
|
|
* @return bool|string
|
|
* @deprecated since 1.21, use generateContentDiffBody() instead!
|
|
*/
|
|
function generateDiffBody( $otext, $ntext ) {
|
|
ContentHandler::deprecated( __METHOD__, "1.21" );
|
|
|
|
return $this->generateTextDiffBody( $otext, $ntext );
|
|
}
|
|
|
|
/**
|
|
* Generate a diff, no caching
|
|
*
|
|
* @todo move this to TextDifferenceEngine, make DifferenceEngine abstract. At some point.
|
|
*
|
|
* @param string $otext old text, must be already segmented
|
|
* @param string $ntext new text, must be already segmented
|
|
* @return bool|string
|
|
*/
|
|
function generateTextDiffBody( $otext, $ntext ) {
|
|
global $wgExternalDiffEngine, $wgContLang;
|
|
|
|
wfProfileIn( __METHOD__ );
|
|
|
|
$otext = str_replace( "\r\n", "\n", $otext );
|
|
$ntext = str_replace( "\r\n", "\n", $ntext );
|
|
|
|
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 ) );
|
|
wfProfileOut( __METHOD__ );
|
|
return $wgContLang->unsegmentForDiff( 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' );
|
|
wfProfileOut( __METHOD__ );
|
|
return $text;
|
|
}
|
|
if ( $wgExternalDiffEngine != 'wikidiff3' && $wgExternalDiffEngine !== false ) {
|
|
# Diff via the shell
|
|
$tmpDir = wfTempDir();
|
|
$tempName1 = tempnam( $tmpDir, 'diff_' );
|
|
$tempName2 = tempnam( $tmpDir, '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 );
|
|
wfProfileOut( __METHOD__ );
|
|
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();
|
|
$difftext = $wgContLang->unsegmentForDiff( $formatter->format( $diffs ) ) .
|
|
wfProfileOut( __METHOD__ );
|
|
return $difftext;
|
|
}
|
|
|
|
/**
|
|
* Generate a debug comment indicating diff generating time,
|
|
* server node, and generator backend.
|
|
* @return string
|
|
*/
|
|
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
|
|
* @return mixed
|
|
*/
|
|
function localiseLineNumbers( $text ) {
|
|
return preg_replace_callback( '/<!--LINE (\d+)-->/',
|
|
array( &$this, 'localiseLineNumbersCb' ), $text );
|
|
}
|
|
|
|
function localiseLineNumbersCb( $matches ) {
|
|
if ( $matches[1] === '1' && $this->mReducedLineNumbers ) {
|
|
return '';
|
|
}
|
|
return $this->msg( 'lineno' )->numParams( $matches[1] )->escaped();
|
|
}
|
|
|
|
/**
|
|
* If there are revisions between the ones being compared, return a note saying so.
|
|
* @return string
|
|
*/
|
|
function getMultiNotice() {
|
|
if ( !is_object( $this->mOldRev ) || !is_object( $this->mNewRev ) ) {
|
|
return '';
|
|
} elseif ( !$this->mOldPage->equals( $this->mNewPage ) ) {
|
|
// Comparing two different pages? Count would be meaningless.
|
|
return '';
|
|
}
|
|
|
|
if ( $this->mOldRev->getTimestamp() > $this->mNewRev->getTimestamp() ) {
|
|
$oldRev = $this->mNewRev; // flip
|
|
$newRev = $this->mOldRev; // flip
|
|
} else { // normal case
|
|
$oldRev = $this->mOldRev;
|
|
$newRev = $this->mNewRev;
|
|
}
|
|
|
|
$nEdits = $this->mNewPage->countRevisionsBetween( $oldRev, $newRev );
|
|
if ( $nEdits > 0 ) {
|
|
$limit = 100; // use diff-multi-manyusers if too many users
|
|
$numUsers = $this->mNewPage->countAuthorsBetween( $oldRev, $newRev, $limit );
|
|
return self::intermediateEditsMsg( $nEdits, $numUsers, $limit );
|
|
}
|
|
return ''; // nothing
|
|
}
|
|
|
|
/**
|
|
* Get a notice about how many intermediate edits and users there are
|
|
* @param $numEdits int
|
|
* @param $numUsers int
|
|
* @param $limit int
|
|
* @return string
|
|
*/
|
|
public static function intermediateEditsMsg( $numEdits, $numUsers, $limit ) {
|
|
if ( $numUsers > $limit ) {
|
|
$msg = 'diff-multi-manyusers';
|
|
$numUsers = $limit;
|
|
} else {
|
|
$msg = 'diff-multi';
|
|
}
|
|
return wfMessage( $msg )->numParams( $numEdits, $numUsers )->parse();
|
|
}
|
|
|
|
/**
|
|
* Get a header for a specified revision.
|
|
*
|
|
* @param $rev Revision
|
|
* @param string $complete 'complete' to get the header wrapped depending
|
|
* the visibility of the revision and a link to edit the page.
|
|
* @return String HTML fragment
|
|
*/
|
|
protected function getRevisionHeader( Revision $rev, $complete = '' ) {
|
|
$lang = $this->getLanguage();
|
|
$user = $this->getUser();
|
|
$revtimestamp = $rev->getTimestamp();
|
|
$timestamp = $lang->userTimeAndDate( $revtimestamp, $user );
|
|
$dateofrev = $lang->userDate( $revtimestamp, $user );
|
|
$timeofrev = $lang->userTime( $revtimestamp, $user );
|
|
|
|
$header = $this->msg(
|
|
$rev->isCurrent() ? 'currentrev-asof' : 'revisionasof',
|
|
$timestamp,
|
|
$dateofrev,
|
|
$timeofrev
|
|
)->escaped();
|
|
|
|
if ( $complete !== 'complete' ) {
|
|
return $header;
|
|
}
|
|
|
|
$title = $rev->getTitle();
|
|
|
|
$header = Linker::linkKnown( $title, $header, array(),
|
|
array( 'oldid' => $rev->getID() ) );
|
|
|
|
if ( $rev->userCan( Revision::DELETED_TEXT, $user ) ) {
|
|
$editQuery = array( 'action' => 'edit' );
|
|
if ( !$rev->isCurrent() ) {
|
|
$editQuery['oldid'] = $rev->getID();
|
|
}
|
|
|
|
$msg = $this->msg( $title->quickUserCan( 'edit', $user ) ? 'editold' : 'viewsourceold' )->escaped();
|
|
$header .= ' ' . $this->msg( 'parentheses' )->rawParams(
|
|
Linker::linkKnown( $title, $msg, array(), $editQuery ) )->plain();
|
|
if ( $rev->isDeleted( Revision::DELETED_TEXT ) ) {
|
|
$header = Html::rawElement( 'span', array( 'class' => 'history-deleted' ), $header );
|
|
}
|
|
} else {
|
|
$header = Html::rawElement( 'span', array( 'class' => 'history-deleted' ), $header );
|
|
}
|
|
|
|
return $header;
|
|
}
|
|
|
|
/**
|
|
* Add the header to a diff body
|
|
*
|
|
* @return string
|
|
*/
|
|
function addHeader( $diff, $otitle, $ntitle, $multi = '', $notice = '' ) {
|
|
// shared.css sets diff in interface language/dir, but the actual content
|
|
// is often in a different language, mostly the page content language/dir
|
|
$tableClass = 'diff diff-contentalign-' . htmlspecialchars( $this->getDiffLang()->alignStart() );
|
|
$header = "<table class='$tableClass'>";
|
|
|
|
if ( !$diff && !$otitle ) {
|
|
$header .= "
|
|
<tr style='vertical-align: top;'>
|
|
<td class='diff-ntitle'>{$ntitle}</td>
|
|
</tr>";
|
|
$multiColspan = 1;
|
|
} else {
|
|
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;
|
|
$multiColspan = 4;
|
|
} else {
|
|
$colspan = 1;
|
|
$multiColspan = 2;
|
|
}
|
|
if ( $otitle || $ntitle ) {
|
|
$header .= "
|
|
<tr style='vertical-align: top;'>
|
|
<td colspan='$colspan' class='diff-otitle'>{$otitle}</td>
|
|
<td colspan='$colspan' class='diff-ntitle'>{$ntitle}</td>
|
|
</tr>";
|
|
}
|
|
}
|
|
|
|
if ( $multi != '' ) {
|
|
$header .= "<tr><td colspan='{$multiColspan}' style='text-align: center;' class='diff-multi'>{$multi}</td></tr>";
|
|
}
|
|
if ( $notice != '' ) {
|
|
$header .= "<tr><td colspan='{$multiColspan}' style='text-align: center;'>{$notice}</td></tr>";
|
|
}
|
|
|
|
return $header . $diff . "</table>";
|
|
}
|
|
|
|
/**
|
|
* Use specified text instead of loading from the database
|
|
* @deprecated since 1.21, use setContent() instead.
|
|
*/
|
|
function setText( $oldText, $newText ) {
|
|
ContentHandler::deprecated( __METHOD__, "1.21" );
|
|
|
|
$oldContent = ContentHandler::makeContent( $oldText, $this->getTitle() );
|
|
$newContent = ContentHandler::makeContent( $newText, $this->getTitle() );
|
|
|
|
$this->setContent( $oldContent, $newContent );
|
|
}
|
|
|
|
/**
|
|
* Use specified text instead of loading from the database
|
|
* @since 1.21
|
|
*/
|
|
function setContent( Content $oldContent, Content $newContent ) {
|
|
$this->mOldContent = $oldContent;
|
|
$this->mNewContent = $newContent;
|
|
|
|
$this->mTextLoaded = 2;
|
|
$this->mRevisionsLoaded = true;
|
|
}
|
|
|
|
/**
|
|
* Set the language in which the diff text is written
|
|
* (Defaults to page content language).
|
|
* @since 1.19
|
|
*/
|
|
function setTextLanguage( $lang ) {
|
|
$this->mDiffLang = wfGetLangObj( $lang );
|
|
}
|
|
|
|
/**
|
|
* Load revision IDs
|
|
*/
|
|
private function loadRevisionIds() {
|
|
if ( $this->mRevisionsIdsLoaded ) {
|
|
return;
|
|
}
|
|
|
|
$this->mRevisionsIdsLoaded = true;
|
|
|
|
$old = $this->mOldid;
|
|
$new = $this->mNewid;
|
|
|
|
if ( $new === 'prev' ) {
|
|
# Show diff between revision $old and the previous one.
|
|
# Get previous one from DB.
|
|
$this->mNewid = intval( $old );
|
|
$this->mOldid = $this->getTitle()->getPreviousRevisionID( $this->mNewid );
|
|
} elseif ( $new === 'next' ) {
|
|
# Show diff between revision $old and the next one.
|
|
# Get next one from DB.
|
|
$this->mOldid = intval( $old );
|
|
$this->mNewid = $this->getTitle()->getNextRevisionID( $this->mOldid );
|
|
if ( $this->mNewid === false ) {
|
|
# 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( $this->getTitle(), &$this->mOldid, &$this->mNewid, $old, $new ) );
|
|
}
|
|
}
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* @return bool
|
|
*/
|
|
function loadRevisionData() {
|
|
if ( $this->mRevisionsLoaded ) {
|
|
return true;
|
|
}
|
|
|
|
// Whether it succeeds or fails, we don't want to try again
|
|
$this->mRevisionsLoaded = true;
|
|
|
|
$this->loadRevisionIds();
|
|
|
|
// Load the new revision object
|
|
$this->mNewRev = $this->mNewid
|
|
? Revision::newFromId( $this->mNewid )
|
|
: Revision::newFromTitle( $this->getTitle(), false, Revision::READ_NORMAL );
|
|
|
|
if ( !$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();
|
|
$this->mNewPage = $this->mNewRev->getTitle();
|
|
|
|
// 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();
|
|
}
|
|
|
|
// Load tags information for both revisions
|
|
$dbr = wfGetDB( DB_SLAVE );
|
|
if ( $this->mOldid !== false ) {
|
|
$this->mOldTags = $dbr->selectField(
|
|
'tag_summary',
|
|
'ts_tags',
|
|
array( 'ts_rev_id' => $this->mOldid ),
|
|
__METHOD__
|
|
);
|
|
} else {
|
|
$this->mOldTags = false;
|
|
}
|
|
$this->mNewTags = $dbr->selectField(
|
|
'tag_summary',
|
|
'ts_tags',
|
|
array( 'ts_rev_id' => $this->mNewid ),
|
|
__METHOD__
|
|
);
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Load the text of the revisions, as well as revision data.
|
|
*
|
|
* @return bool
|
|
*/
|
|
function loadText() {
|
|
if ( $this->mTextLoaded == 2 ) {
|
|
return true;
|
|
}
|
|
|
|
// Whether it succeeds or fails, we don't want to try again
|
|
$this->mTextLoaded = 2;
|
|
|
|
if ( !$this->loadRevisionData() ) {
|
|
return false;
|
|
}
|
|
|
|
if ( $this->mOldRev ) {
|
|
$this->mOldContent = $this->mOldRev->getContent( Revision::FOR_THIS_USER, $this->getUser() );
|
|
if ( $this->mOldContent === null ) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if ( $this->mNewRev ) {
|
|
$this->mNewContent = $this->mNewRev->getContent( Revision::FOR_THIS_USER, $this->getUser() );
|
|
if ( $this->mNewContent === null ) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Load the text of the new revision, not the old one
|
|
*
|
|
* @return bool
|
|
*/
|
|
function loadNewText() {
|
|
if ( $this->mTextLoaded >= 1 ) {
|
|
return true;
|
|
}
|
|
|
|
$this->mTextLoaded = 1;
|
|
|
|
if ( !$this->loadRevisionData() ) {
|
|
return false;
|
|
}
|
|
|
|
$this->mNewContent = $this->mNewRev->getContent( Revision::FOR_THIS_USER, $this->getUser() );
|
|
|
|
return true;
|
|
}
|
|
}
|