<?php
/**
- * @defgroup DifferenceEngine DifferenceEngine
- */
-
-// A PHP diff engine for phpwiki. (Taken from phpwiki-1.3.3)
-//
-// Copyright (C) 2000, 2001 Geoffrey T. Dairiki <dairiki@dairiki.org>
-// You may copy this code freely under the conditions of the GPL.
-//
-
-define('USE_ASSERTS', function_exists('assert'));
-
-/**
- * @todo document
- * @private
+ * User interface for the difference engine
+ *
+ * @file
* @ingroup DifferenceEngine
*/
-class _DiffOp {
- var $type;
- var $orig;
- var $closing;
-
- function reverse() {
- trigger_error('pure virtual', E_USER_ERROR);
- }
-
- function norig() {
- return $this->orig ? sizeof($this->orig) : 0;
- }
-
- function nclosing() {
- return $this->closing ? sizeof($this->closing) : 0;
- }
-}
/**
- * @todo document
- * @private
- * @ingroup 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.
*/
-class _DiffOp_Copy extends _DiffOp {
- var $type = 'copy';
-
- function _DiffOp_Copy ($orig, $closing = false) {
- if (!is_array($closing))
- $closing = $orig;
- $this->orig = $orig;
- $this->closing = $closing;
- }
-
- function reverse() {
- return new _DiffOp_Copy($this->closing, $this->orig);
- }
-}
+define( 'MW_DIFF_VERSION', '1.11a' );
/**
* @todo document
- * @private
* @ingroup DifferenceEngine
*/
-class _DiffOp_Delete extends _DiffOp {
- var $type = 'delete';
+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 $mCacheHit = false; // Was the diff fetched from cache?
- function _DiffOp_Delete ($lines) {
- $this->orig = $lines;
- $this->closing = false;
- }
+ /**
+ * Set this to true to add debug info to the HTML output.
+ * Warning: this may cause RSS readers to spuriously mark articles as "new"
+ * (bug 20601)
+ */
+ var $enableDebugComment = false;
- function reverse() {
- return new _DiffOp_Add($this->orig);
- }
-}
+ // 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;
-/**
- * @todo document
- * @private
- * @ingroup DifferenceEngine
- */
-class _DiffOp_Add extends _DiffOp {
- var $type = 'add';
+ protected $unhide = false; # show rev_deleted content if allowed
+ /**#@-*/
- function _DiffOp_Add ($lines) {
- $this->closing = $lines;
- $this->orig = 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 $unhide boolean If set, allow viewing deleted revs
+ */
+ function __construct( $titleObj = null, $old = 0, $new = 0, $rcid = 0,
+ $refreshCache = 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->unhide = $unhide;
}
- function reverse() {
- return new _DiffOp_Delete($this->closing);
+ function setReducedLineNumbers( $value = true ) {
+ $this->mReducedLineNumbers = $value;
}
-}
-/**
- * @todo document
- * @private
- * @ingroup DifferenceEngine
- */
-class _DiffOp_Change extends _DiffOp {
- var $type = 'change';
-
- function _DiffOp_Change ($orig, $closing) {
- $this->orig = $orig;
- $this->closing = $closing;
+ function getTitle() {
+ return $this->mTitle;
}
- function reverse() {
- return new _DiffOp_Change($this->closing, $this->orig);
+ function wasCacheHit() {
+ return $this->mCacheHit;
}
-}
-/**
- * Class used internally by Diff to actually compute the diffs.
- *
- * The algorithm used here is mostly lifted from the perl module
- * Algorithm::Diff (version 1.06) by Ned Konz, which is available at:
- * http://www.perl.com/CPAN/authors/id/N/NE/NEDKONZ/Algorithm-Diff-1.06.zip
- *
- * More ideas are taken from:
- * http://www.ics.uci.edu/~eppstein/161/960229.html
- *
- * Some ideas are (and a bit of code) are from from analyze.c, from GNU
- * diffutils-2.7, which can be found at:
- * ftp://gnudist.gnu.org/pub/gnu/diffutils/diffutils-2.7.tar.gz
- *
- * closingly, some ideas (subdivision by NCHUNKS > 2, and some optimizations)
- * are my own.
- *
- * Line length limits for robustness added by Tim Starling, 2005-08-31
- * Alternative implementation added by Guy Van den Broeck, 2008-07-30
- *
- * @author Geoffrey T. Dairiki, Tim Starling, Guy Van den Broeck
- * @private
- * @ingroup DifferenceEngine
- */
-class _DiffEngine {
+ function getOldid() {
+ return $this->mOldid;
+ }
- const MAX_XREF_LENGTH = 10000;
+ function getNewid() {
+ return $this->mNewid;
+ }
- function diff ($from_lines, $to_lines){
+ function showDiffPage( $diffOnly = false ) {
+ global $wgUser, $wgOut, $wgUseExternalEditor, $wgUseRCPatrol;
wfProfileIn( __METHOD__ );
- // Diff and store locally
- $this->diff_local($from_lines, $to_lines);
-
- // Merge edits when possible
- $this->_shift_boundaries($from_lines, $this->xchanged, $this->ychanged);
- $this->_shift_boundaries($to_lines, $this->ychanged, $this->xchanged);
-
- // Compute the edit operations.
- $n_from = sizeof($from_lines);
- $n_to = sizeof($to_lines);
-
- $edits = array();
- $xi = $yi = 0;
- while ($xi < $n_from || $yi < $n_to) {
- USE_ASSERTS && assert($yi < $n_to || $this->xchanged[$xi]);
- USE_ASSERTS && assert($xi < $n_from || $this->ychanged[$yi]);
-
- // Skip matching "snake".
- $copy = array();
- while ( $xi < $n_from && $yi < $n_to
- && !$this->xchanged[$xi] && !$this->ychanged[$yi]) {
- $copy[] = $from_lines[$xi++];
- ++$yi;
- }
- if ($copy)
- $edits[] = new _DiffOp_Copy($copy);
+ # Allow frames except in certain special cases
+ $wgOut->allowClickjacking();
+
+ # 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 );
+
+ wfProfileOut( __METHOD__ );
+ return;
+ }
- // Find deletes & adds.
- $delete = array();
- while ($xi < $n_from && $this->xchanged[$xi])
- $delete[] = $from_lines[$xi++];
+ $wgOut->setArticleFlag( false );
+ if ( !$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;
+ }
- $add = array();
- while ($yi < $n_to && $this->ychanged[$yi])
- $add[] = $to_lines[$yi++];
+ wfRunHooks( 'DiffViewHeader', array( $this, $this->mOldRev, $this->mNewRev ) );
- if ($delete && $add)
- $edits[] = new _DiffOp_Change($delete, $add);
- elseif ($delete)
- $edits[] = new _DiffOp_Delete($delete);
- elseif ($add)
- $edits[] = new _DiffOp_Add($add);
+ if ( $this->mNewRev->isCurrent() ) {
+ $wgOut->setArticleFlag( true );
}
- wfProfileOut( __METHOD__ );
- return $edits;
- }
-
- function diff_local ($from_lines, $to_lines) {
- global $wgExternalDiffEngine;
- wfProfileIn( __METHOD__);
-
- if($wgExternalDiffEngine == 'wikidiff3'){
- // wikidiff3
- $wikidiff3 = new WikiDiff3();
- $wikidiff3->diff($from_lines, $to_lines);
- $this->xchanged = $wikidiff3->removed;
- $this->ychanged = $wikidiff3->added;
- unset($wikidiff3);
- }else{
- // old diff
- $n_from = sizeof($from_lines);
- $n_to = sizeof($to_lines);
- $this->xchanged = $this->ychanged = array();
- $this->xv = $this->yv = array();
- $this->xind = $this->yind = array();
- unset($this->seq);
- unset($this->in_seq);
- unset($this->lcs);
-
- // Skip leading common lines.
- for ($skip = 0; $skip < $n_from && $skip < $n_to; $skip++) {
- if ($from_lines[$skip] !== $to_lines[$skip])
- break;
- $this->xchanged[$skip] = $this->ychanged[$skip] = false;
- }
- // Skip trailing common lines.
- $xi = $n_from; $yi = $n_to;
- for ($endskip = 0; --$xi > $skip && --$yi > $skip; $endskip++) {
- if ($from_lines[$xi] !== $to_lines[$yi])
- break;
- $this->xchanged[$xi] = $this->ychanged[$yi] = false;
- }
- // Ignore lines which do not exist in both files.
- for ($xi = $skip; $xi < $n_from - $endskip; $xi++) {
- $xhash[$this->_line_hash($from_lines[$xi])] = 1;
- }
+ # 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 $diffOnly here or not?
+ wfProfileOut( __METHOD__ );
+ return;
+ }
- for ($yi = $skip; $yi < $n_to - $endskip; $yi++) {
- $line = $to_lines[$yi];
- if ( ($this->ychanged[$yi] = empty($xhash[$this->_line_hash($line)])) )
- continue;
- $yhash[$this->_line_hash($line)] = 1;
- $this->yv[] = $line;
- $this->yind[] = $yi;
- }
- for ($xi = $skip; $xi < $n_from - $endskip; $xi++) {
- $line = $from_lines[$xi];
- if ( ($this->xchanged[$xi] = empty($yhash[$this->_line_hash($line)])) )
- continue;
- $this->xv[] = $line;
- $this->xind[] = $xi;
- }
+ $wgOut->suppressQuickbar();
- // Find the LCS.
- $this->_compareseq(0, sizeof($this->xv), 0, sizeof($this->yv));
+ $oldTitle = $this->mOldPage->getPrefixedText();
+ $newTitle = $this->mNewPage->getPrefixedText();
+ if ( $oldTitle == $newTitle ) {
+ $wgOut->setPageTitle( $newTitle );
+ } else {
+ $wgOut->setPageTitle( $oldTitle . ', ' . $newTitle );
+ }
+ if ( $this->mNewPage->equals( $this->mOldPage ) ) {
+ $wgOut->setSubtitle( wfMsgExt( 'difference', array( 'parseinline' ) ) );
+ } else {
+ $wgOut->setSubtitle( wfMsgExt( 'difference-multipage', array( 'parseinline' ) ) );
+ }
+ $wgOut->setRobotPolicy( 'noindex,nofollow' );
+
+ if ( !$this->mOldPage->userCanRead() || !$this->mNewPage->userCanRead() ) {
+ $wgOut->loginToUse();
+ $wgOut->output();
+ $wgOut->disable();
+ wfProfileOut( __METHOD__ );
+ return;
}
- wfProfileOut( __METHOD__ );
- }
- /**
- * Returns the whole line if it's small enough, or the MD5 hash otherwise
- */
- function _line_hash( $line ) {
- if ( strlen( $line ) > self::MAX_XREF_LENGTH ) {
- return md5( $line );
+ $sk = $wgUser->getSkin();
+
+ // Check if page is editable
+ $editable = $this->mNewRev->getTitle()->userCan( 'edit' );
+ if ( $editable && $this->mNewRev->isCurrent() && $wgUser->isAllowed( 'rollback' ) ) {
+ $wgOut->preventClickjacking();
+ $rollback = '   ' . $sk->generateRollback( $this->mNewRev );
} else {
- return $line;
+ $rollback = '';
}
- }
- /* Divide the Largest Common Subsequence (LCS) of the sequences
- * [XOFF, XLIM) and [YOFF, YLIM) into NCHUNKS approximately equally
- * sized segments.
- *
- * Returns (LCS, PTS). LCS is the length of the LCS. PTS is an
- * array of NCHUNKS+1 (X, Y) indexes giving the diving points between
- * sub sequences. The first sub-sequence is contained in [X0, X1),
- * [Y0, Y1), the second in [X1, X2), [Y1, Y2) and so on. Note
- * that (X0, Y0) == (XOFF, YOFF) and
- * (X[NCHUNKS], Y[NCHUNKS]) == (XLIM, YLIM).
- *
- * This function assumes that the first lines of the specified portions
- * of the two files do not match, and likewise that the last lines do not
- * match. The caller must trim matching lines from the beginning and end
- * of the portions it is going to specify.
- */
- function _diag ($xoff, $xlim, $yoff, $ylim, $nchunks) {
- $flip = false;
-
- if ($xlim - $xoff > $ylim - $yoff) {
- // Things seems faster (I'm not sure I understand why)
- // when the shortest sequence in X.
- $flip = true;
- list ($xoff, $xlim, $yoff, $ylim)
- = array( $yoff, $ylim, $xoff, $xlim);
- }
-
- if ($flip)
- for ($i = $ylim - 1; $i >= $yoff; $i--)
- $ymatches[$this->xv[$i]][] = $i;
- else
- for ($i = $ylim - 1; $i >= $yoff; $i--)
- $ymatches[$this->yv[$i]][] = $i;
-
- $this->lcs = 0;
- $this->seq[0]= $yoff - 1;
- $this->in_seq = array();
- $ymids[0] = array();
-
- $numer = $xlim - $xoff + $nchunks - 1;
- $x = $xoff;
- for ($chunk = 0; $chunk < $nchunks; $chunk++) {
- if ($chunk > 0)
- for ($i = 0; $i <= $this->lcs; $i++)
- $ymids[$i][$chunk-1] = $this->seq[$i];
-
- $x1 = $xoff + (int)(($numer + ($xlim-$xoff)*$chunk) / $nchunks);
- for ( ; $x < $x1; $x++) {
- $line = $flip ? $this->yv[$x] : $this->xv[$x];
- if (empty($ymatches[$line]))
- continue;
- $matches = $ymatches[$line];
- reset($matches);
- while (list ($junk, $y) = each($matches))
- if (empty($this->in_seq[$y])) {
- $k = $this->_lcs_pos($y);
- USE_ASSERTS && assert($k > 0);
- $ymids[$k] = $ymids[$k-1];
- break;
- }
- while (list ( /* $junk */, $y) = each($matches)) {
- if ($y > $this->seq[$k-1]) {
- USE_ASSERTS && assert($y < $this->seq[$k]);
- // Optimization: this is a common case:
- // next match is just replacing previous match.
- $this->in_seq[$this->seq[$k]] = false;
- $this->seq[$k] = $y;
- $this->in_seq[$y] = 1;
- } else if (empty($this->in_seq[$y])) {
- $k = $this->_lcs_pos($y);
- USE_ASSERTS && assert($k > 0);
- $ymids[$k] = $ymids[$k-1];
- }
+ // 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 ) {
+ $wgOut->preventClickjacking();
+ $token = $wgUser->editToken( $rcid );
+ $patrol = ' <span class="patrollink">[' . $sk->link(
+ $this->mTitle,
+ wfMsgHtml( 'markaspatrolleddiff' ),
+ array(),
+ array(
+ 'action' => 'markpatrolled',
+ 'rcid' => $rcid,
+ 'token' => $token,
+ ),
+ array(
+ 'known',
+ 'noclasses'
+ )
+ ) . ']</span>';
+ } else {
+ $patrol = '';
+ }
+ } else {
+ $patrol = '';
}
- $seps[] = $flip ? array($yoff, $xoff) : array($xoff, $yoff);
- $ymid = $ymids[$this->lcs];
- for ($n = 0; $n < $nchunks - 1; $n++) {
- $x1 = $xoff + (int)(($numer + ($xlim - $xoff) * $n) / $nchunks);
- $y1 = $ymid[$n] + 1;
- $seps[] = $flip ? array($y1, $x1) : array($x1, $y1);
+ # Carry over 'diffonly' param via navigation links
+ if ( $diffOnly != $wgUser->getBoolOption( 'diffonly' ) ) {
+ $query['diffonly'] = $diffOnly;
}
- $seps[] = $flip ? array($ylim, $xlim) : array($xlim, $ylim);
- return array($this->lcs, $seps);
- }
-
- function _lcs_pos ($ypos) {
- $end = $this->lcs;
- if ($end == 0 || $ypos > $this->seq[$end]) {
- $this->seq[++$this->lcs] = $ypos;
- $this->in_seq[$ypos] = 1;
- return $this->lcs;
+ # Make "previous revision link"
+ $query['diff'] = 'prev';
+ $query['oldid'] = $this->mOldid;
+ # Cascade unhide param in links for easy deletion browsing
+ if ( $this->unhide ) {
+ $query['unhide'] = 1;
+ }
+ if ( !$this->mOldRev->getPrevious() ) {
+ $prevlink = ' ';
+ } else {
+ $prevlink = $sk->link(
+ $this->mTitle,
+ wfMsgHtml( 'previousdiff' ),
+ array(
+ 'id' => 'differences-prevlink'
+ ),
+ $query,
+ array(
+ 'known',
+ 'noclasses'
+ )
+ );
}
- $beg = 1;
- while ($beg < $end) {
- $mid = (int)(($beg + $end) / 2);
- if ( $ypos > $this->seq[$mid] )
- $beg = $mid + 1;
- else
- $end = $mid;
+ # Make "next revision link"
+ $query['diff'] = 'next';
+ $query['oldid'] = $this->mNewid;
+ # Skip next link on the top revision
+ if ( $this->mNewRev->isCurrent() ) {
+ $nextlink = ' ';
+ } else {
+ $nextlink = $sk->link(
+ $this->mTitle,
+ wfMsgHtml( 'nextdiff' ),
+ array(
+ 'id' => 'differences-nextlink'
+ ),
+ $query,
+ array(
+ 'known',
+ 'noclasses'
+ )
+ );
}
- USE_ASSERTS && assert($ypos != $this->seq[$end]);
+ $oldminor = '';
+ $newminor = '';
- $this->in_seq[$this->seq[$end]] = false;
- $this->seq[$end] = $ypos;
- $this->in_seq[$ypos] = 1;
- return $end;
- }
+ if ( $this->mOldRev->isMinor() ) {
+ $oldminor = ChangesList::flag( 'minor' );
+ }
+ if ( $this->mNewRev->isMinor() ) {
+ $newminor = ChangesList::flag( 'minor' );
+ }
- /* Find LCS of two sequences.
- *
- * The results are recorded in the vectors $this->{x,y}changed[], by
- * storing a 1 in the element for each line that is an insertion
- * or deletion (ie. is not in the LCS).
- *
- * The subsequence of file 0 is [XOFF, XLIM) and likewise for file 1.
- *
- * Note that XLIM, YLIM are exclusive bounds.
- * All line numbers are origin-0 and discarded lines are not counted.
- */
- function _compareseq ($xoff, $xlim, $yoff, $ylim) {
- // Slide down the bottom initial diagonal.
- while ($xoff < $xlim && $yoff < $ylim
- && $this->xv[$xoff] == $this->yv[$yoff]) {
- ++$xoff;
- ++$yoff;
- }
-
- // Slide up the top initial diagonal.
- while ($xlim > $xoff && $ylim > $yoff
- && $this->xv[$xlim - 1] == $this->yv[$ylim - 1]) {
- --$xlim;
- --$ylim;
- }
-
- if ($xoff == $xlim || $yoff == $ylim)
- $lcs = 0;
- else {
- // This is ad hoc but seems to work well.
- //$nchunks = sqrt(min($xlim - $xoff, $ylim - $yoff) / 2.5);
- //$nchunks = max(2,min(8,(int)$nchunks));
- $nchunks = min(7, $xlim - $xoff, $ylim - $yoff) + 1;
- list ($lcs, $seps)
- = $this->_diag($xoff,$xlim,$yoff, $ylim,$nchunks);
- }
-
- if ($lcs == 0) {
- // X and Y sequences have no common subsequence:
- // mark all changed.
- while ($yoff < $ylim)
- $this->ychanged[$this->yind[$yoff++]] = 1;
- while ($xoff < $xlim)
- $this->xchanged[$this->xind[$xoff++]] = 1;
+ # Handle RevisionDelete links...
+ $ldel = $this->revisionDeleteLink( $this->mOldRev );
+ $rdel = $this->revisionDeleteLink( $this->mNewRev );
+
+ $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
+ }
+ # If the diff cannot be shown due to a deleted revision, then output
+ # the diff header and links to unhide (if available)...
+ if ( $deleted && ( !$this->unhide || !$allowed ) ) {
+ $this->showDiffStyle();
+ $multi = $this->getMultiNotice();
+ $wgOut->addHTML( $this->addHeader( '', $oldHeader, $newHeader, $multi ) );
+ if ( !$allowed ) {
+ $msg = $suppressed ? 'rev-suppressed-no-diff' : 'rev-deleted-no-diff';
+ # Give explanation for why revision is not visible
+ $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n",
+ array( $msg ) );
+ } 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\n</div>\n", array( $msg, $link ) );
+ }
+ # Otherwise, output a regular diff...
} else {
- // Use the partitions to split this problem into subproblems.
- reset($seps);
- $pt1 = $seps[0];
- while ($pt2 = next($seps)) {
- $this->_compareseq ($pt1[0], $pt2[0], $pt1[1], $pt2[1]);
- $pt1 = $pt2;
+ # Add deletion notice if the user is viewing deleted content
+ $notice = '';
+ if ( $deleted ) {
+ $msg = $suppressed ? 'rev-suppressed-diff-view' : 'rev-deleted-diff-view';
+ $notice = "<div class='mw-warning plainlinks'>\n" . wfMsgExt( $msg, 'parseinline' ) . "</div>\n";
+ }
+ $this->showDiff( $oldHeader, $newHeader, $notice );
+ if ( !$diffOnly ) {
+ $this->renderNewRevision();
}
}
+ wfProfileOut( __METHOD__ );
}
- /* Adjust inserts/deletes of identical lines to join changes
- * as much as possible.
- *
- * We do something when a run of changed lines include a
- * line at one end and has an excluded, identical line at the other.
- * We are free to choose which identical line is included.
- * `compareseq' usually chooses the one at the beginning,
- * but usually it is cleaner to consider the following identical line
- * to be the "change".
- *
- * This is extracted verbatim from analyze.c (GNU diffutils-2.7).
- */
- function _shift_boundaries ($lines, &$changed, $other_changed) {
- wfProfileIn( __METHOD__ );
- $i = 0;
- $j = 0;
-
- USE_ASSERTS && assert('sizeof($lines) == sizeof($changed)');
- $len = sizeof($lines);
- $other_len = sizeof($other_changed);
-
- while (1) {
- /*
- * Scan forwards to find beginning of another run of changes.
- * Also keep track of the corresponding point in the other file.
- *
- * Throughout this code, $i and $j are adjusted together so that
- * the first $i elements of $changed and the first $j elements
- * of $other_changed both contain the same number of zeros
- * (unchanged lines).
- * Furthermore, $j is always kept so that $j == $other_len or
- * $other_changed[$j] == false.
- */
- while ($j < $other_len && $other_changed[$j])
- $j++;
-
- while ($i < $len && ! $changed[$i]) {
- USE_ASSERTS && assert('$j < $other_len && ! $other_changed[$j]');
- $i++; $j++;
- while ($j < $other_len && $other_changed[$j])
- $j++;
- }
-
- if ($i == $len)
- break;
-
- $start = $i;
-
- // Find the end of this run of changes.
- while (++$i < $len && $changed[$i])
- continue;
-
- do {
- /*
- * Record the length of this run of changes, so that
- * we can later determine whether the run has grown.
- */
- $runlength = $i - $start;
-
- /*
- * Move the changed region back, so long as the
- * previous unchanged line matches the last changed one.
- * This merges with previous changed regions.
- */
- while ($start > 0 && $lines[$start - 1] == $lines[$i - 1]) {
- $changed[--$start] = 1;
- $changed[--$i] = false;
- while ($start > 0 && $changed[$start - 1])
- $start--;
- USE_ASSERTS && assert('$j > 0');
- while ($other_changed[--$j])
- continue;
- USE_ASSERTS && assert('$j >= 0 && !$other_changed[$j]');
- }
-
- /*
- * Set CORRESPONDING to the end of the changed run, at the last
- * point where it corresponds to a changed run in the other file.
- * CORRESPONDING == LEN means no such point has been found.
- */
- $corresponding = $j < $other_len ? $i : $len;
-
- /*
- * Move the changed region forward, so long as the
- * first changed line matches the following unchanged one.
- * This merges with following changed regions.
- * Do this second, so that if there are no merges,
- * the changed region is moved forward as far as possible.
- */
- while ($i < $len && $lines[$start] == $lines[$i]) {
- $changed[$start++] = false;
- $changed[$i++] = 1;
- while ($i < $len && $changed[$i])
- $i++;
-
- USE_ASSERTS && assert('$j < $other_len && ! $other_changed[$j]');
- $j++;
- if ($j < $other_len && $other_changed[$j]) {
- $corresponding = $i;
- while ($j < $other_len && $other_changed[$j])
- $j++;
- }
- }
- } while ($runlength != $i - $start);
-
- /*
- * If possible, move the fully-merged run of changes
- * back to a corresponding run in the other file.
- */
- while ($corresponding < $i) {
- $changed[--$start] = 1;
- $changed[--$i] = 0;
- USE_ASSERTS && assert('$j > 0');
- while ($other_changed[--$j])
- continue;
- USE_ASSERTS && assert('$j >= 0 && !$other_changed[$j]');
+ protected function revisionDeleteLink( $rev ) {
+ global $wgUser;
+ $link = '';
+ $canHide = $wgUser->isAllowed( 'deleterevision' );
+ // Show del/undel link if:
+ // (a) the user can delete revisions, or
+ // (b) the user can view deleted revision *and* this one is deleted
+ if ( $canHide || ( $rev->getVisibility() && $wgUser->isAllowed( 'deletedhistory' ) ) ) {
+ $sk = $wgUser->getSkin();
+ if ( !$rev->userCan( Revision::DELETED_RESTRICTED ) ) {
+ $link = $sk->revDeleteLinkDisabled( $canHide ); // revision was hidden from sysops
+ } else {
+ $query = array(
+ 'type' => 'revision',
+ 'target' => $rev->mTitle->getPrefixedDbkey(),
+ 'ids' => $rev->getId()
+ );
+ $link = $sk->revDeleteLink( $query,
+ $rev->isDeleted( Revision::DELETED_RESTRICTED ), $canHide );
}
+ $link = '   ' . $link . ' ';
}
- wfProfileOut( __METHOD__ );
+ return $link;
}
-}
-
-/**
- * Class representing a 'diff' between two sequences of strings.
- * @todo document
- * @private
- * @ingroup DifferenceEngine
- */
-class Diff
-{
- var $edits;
/**
- * Constructor.
- * Computes diff between sequences of strings.
- *
- * @param $from_lines array An array of strings.
- * (Typically these are lines from a file.)
- * @param $to_lines array An array of strings.
+ * Show the new revision of the page.
*/
- function Diff($from_lines, $to_lines) {
- $eng = new _DiffEngine;
- $this->edits = $eng->diff($from_lines, $to_lines);
- //$this->_check($from_lines, $to_lines);
- }
+ function renderNewRevision() {
+ global $wgOut, $wgUser;
+ wfProfileIn( __METHOD__ );
- /**
- * Compute reversed Diff.
- *
- * SYNOPSIS:
- *
- * $diff = new Diff($lines1, $lines2);
- * $rev = $diff->reverse();
- * @return object A Diff object representing the inverse of the
- * original diff.
- */
- function reverse () {
- $rev = $this;
- $rev->edits = array();
- foreach ($this->edits as $edit) {
- $rev->edits[] = $edit->reverse();
+ $wgOut->addHTML( "<hr /><h2>{$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\n</div>\n", 'rev-deleted-text-permission' );
+ } else if ( $this->mNewRev->isDeleted( Revision::DELETED_TEXT ) ) {
+ $wgOut->wrapWikiMsg( "<div class='mw-warning plainlinks'>\n$1\n</div>\n", 'rev-deleted-text-view' );
}
- return $rev;
- }
- /**
- * Check for empty diff.
- *
- * @return bool True iff two sequences were identical.
- */
- function isEmpty () {
- foreach ($this->edits as $edit) {
- if ($edit->type != 'copy')
- return false;
+ $pCache = true;
+ if ( !$this->mNewRev->isCurrent() ) {
+ $oldEditSectionSetting = $wgOut->parserOptions()->setEditSection( false );
+ $pCache = false;
}
- return true;
- }
- /**
- * Compute the length of the Longest Common Subsequence (LCS).
- *
- * This is mostly for diagnostic purposed.
- *
- * @return int The length of the LCS.
- */
- function lcs () {
- $lcs = 0;
- foreach ($this->edits as $edit) {
- if ($edit->type == 'copy')
- $lcs += sizeof($edit->orig);
+ $this->loadNewText();
+ if ( is_object( $this->mNewRev ) ) {
+ $wgOut->setRevisionId( $this->mNewRev->getId() );
}
- return $lcs;
- }
-
- /**
- * Get the original set of lines.
- *
- * This reconstructs the $from_lines parameter passed to the
- * constructor.
- *
- * @return array The original sequence of strings.
- */
- function orig() {
- $lines = array();
- foreach ($this->edits as $edit) {
- if ($edit->orig)
- array_splice($lines, sizeof($lines), 0, $edit->orig);
+ 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" );
+ }
+ } elseif ( wfRunHooks( 'ArticleContentOnDiff', array( $this, $wgOut ) ) ) {
+ if ( $pCache ) {
+ $article = new Article( $this->mTitle, 0 );
+ $pOutput = ParserCache::singleton()->get( $article, $wgOut->parserOptions() );
+ if ( $pOutput ) {
+ $wgOut->addParserOutput( $pOutput );
+ } else {
+ $article->doViewParse();
+ }
+ } else {
+ $wgOut->addWikiTextTidy( $this->mNewtext );
+ }
}
- return $lines;
- }
- /**
- * Get the closing set of lines.
- *
- * This reconstructs the $to_lines parameter passed to the
- * constructor.
- *
- * @return array The sequence of strings.
- */
- function closing() {
- $lines = array();
+ if ( is_object( $this->mNewRev ) && !$this->mNewRev->isCurrent() ) {
+ $wgOut->parserOptions()->setEditSection( $oldEditSectionSetting );
+ }
- foreach ($this->edits as $edit) {
- if ($edit->closing)
- array_splice($lines, sizeof($lines), 0, $edit->closing);
+ # Add redundant patrol link on bottom...
+ if ( $this->mRcidMarkPatrolled && $this->mTitle->quickUserCan( 'patrol' ) ) {
+ $sk = $wgUser->getSkin();
+ $token = $wgUser->editToken( $this->mRcidMarkPatrolled );
+ $wgOut->preventClickjacking();
+ $wgOut->addHTML(
+ "<div class='patrollink'>[" . $sk->link(
+ $this->mTitle,
+ wfMsgHtml( 'markaspatrolleddiff' ),
+ array(),
+ array(
+ 'action' => 'markpatrolled',
+ 'rcid' => $this->mRcidMarkPatrolled,
+ 'token' => $token,
+ )
+ ) . ']</div>'
+ );
}
- return $lines;
+
+ wfProfileOut( __METHOD__ );
}
/**
- * Check a Diff for validity.
- *
- * This is here only for debugging purposes.
+ * Show the first revision of an article. Uses normal diff headers in
+ * contrast to normal "old revision" display style.
*/
- function _check ($from_lines, $to_lines) {
+ function showFirstRevision() {
+ global $wgOut, $wgUser;
wfProfileIn( __METHOD__ );
- if (serialize($from_lines) != serialize($this->orig()))
- trigger_error("Reconstructed original doesn't match", E_USER_ERROR);
- if (serialize($to_lines) != serialize($this->closing()))
- trigger_error("Reconstructed closing doesn't match", E_USER_ERROR);
- $rev = $this->reverse();
- if (serialize($to_lines) != serialize($rev->orig()))
- trigger_error("Reversed original doesn't match", E_USER_ERROR);
- if (serialize($from_lines) != serialize($rev->closing()))
- trigger_error("Reversed closing doesn't match", E_USER_ERROR);
+ # 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();
- $prevtype = 'none';
- foreach ($this->edits as $edit) {
- if ( $prevtype == $edit->type )
- trigger_error("Edit sequence is non-optimal", E_USER_ERROR);
- $prevtype = $edit->type;
+ $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,
+ ),
+ 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' );
- $lcs = $this->lcs();
- trigger_error('Diff okay: LCS = '.$lcs, E_USER_NOTICE);
wfProfileOut( __METHOD__ );
}
-}
-/**
- * @todo document, bad name.
- * @private
- * @ingroup DifferenceEngine
- */
-class MappedDiff extends Diff
-{
/**
- * Constructor.
- *
- * Computes diff between sequences of strings.
- *
- * This can be used to compute things like
- * case-insensitve diffs, or diffs which ignore
- * changes in white-space.
- *
- * @param $from_lines array An array of strings.
- * (Typically these are lines from a file.)
- *
- * @param $to_lines array An array of strings.
- *
- * @param $mapped_from_lines array This array should
- * have the same size number of elements as $from_lines.
- * The elements in $mapped_from_lines and
- * $mapped_to_lines are what is actually compared
- * when computing the diff.
- *
- * @param $mapped_to_lines array This array should
- * have the same number of elements as $to_lines.
+ * Get the diff text, send it to $wgOut
+ * Returns false if the diff could not be generated, otherwise returns true
*/
- function MappedDiff($from_lines, $to_lines,
- $mapped_from_lines, $mapped_to_lines) {
- wfProfileIn( __METHOD__ );
-
- assert(sizeof($from_lines) == sizeof($mapped_from_lines));
- assert(sizeof($to_lines) == sizeof($mapped_to_lines));
-
- $this->Diff($mapped_from_lines, $mapped_to_lines);
-
- $xi = $yi = 0;
- for ($i = 0; $i < sizeof($this->edits); $i++) {
- $orig = &$this->edits[$i]->orig;
- if (is_array($orig)) {
- $orig = array_slice($from_lines, $xi, sizeof($orig));
- $xi += sizeof($orig);
- }
-
- $closing = &$this->edits[$i]->closing;
- if (is_array($closing)) {
- $closing = array_slice($to_lines, $yi, sizeof($closing));
- $yi += sizeof($closing);
- }
+ function showDiff( $otitle, $ntitle, $notice = '' ) {
+ global $wgOut;
+ $diff = $this->getDiff( $otitle, $ntitle, $notice );
+ if ( $diff === false ) {
+ $wgOut->addWikiMsg( 'missing-article', "<nowiki>(fixme, bug)</nowiki>", '' );
+ return false;
+ } else {
+ $this->showDiffStyle();
+ $wgOut->addHTML( $diff );
+ return true;
}
- wfProfileOut( __METHOD__ );
}
-}
-/**
- * A class to format Diffs
- *
- * This class formats the diff in classic diff format.
- * It is intended that this class be customized via inheritance,
- * to obtain fancier outputs.
- * @todo document
- * @private
- * @ingroup DifferenceEngine
- */
-class DiffFormatter {
/**
- * Number of leading context "lines" to preserve.
- *
- * This should be left at zero for this class, but subclasses
- * may want to set this to other values.
+ * Add style sheets and supporting JS for diff display.
*/
- var $leading_context_lines = 0;
+ function showDiffStyle() {
+ global $wgOut;
+ $wgOut->addModuleStyles( 'mediawiki.legacy.diff' );
+ $wgOut->addModuleScripts( 'mediawiki.legacy.diff' );
+ }
/**
- * Number of trailing context "lines" to preserve.
+ * Get complete diff table, including header
*
- * This should be left at zero for this class, but subclasses
- * may want to set this to other values.
+ * @param $otitle Title: old title
+ * @param $ntitle Title: new title
+ * @param $notice String: HTML between diff header and body
+ * @return mixed
*/
- var $trailing_context_lines = 0;
+ function getDiff( $otitle, $ntitle, $notice = '' ) {
+ $body = $this->getDiffBody();
+ if ( $body === false ) {
+ return false;
+ } else {
+ $multi = $this->getMultiNotice();
+ return $this->addHeader( $body, $otitle, $ntitle, $multi, $notice );
+ }
+ }
/**
- * Format a diff.
+ * Get the diff table body, without header
*
- * @param $diff object A Diff object.
- * @return string The formatted output.
+ * @return mixed (string/false)
*/
- function format($diff) {
+ public function getDiffBody() {
+ global $wgMemc;
wfProfileIn( __METHOD__ );
-
- $xi = $yi = 1;
- $block = false;
- $context = array();
-
- $nlead = $this->leading_context_lines;
- $ntrail = $this->trailing_context_lines;
-
- $this->_start_diff();
-
- foreach ($diff->edits as $edit) {
- if ($edit->type == 'copy') {
- if (is_array($block)) {
- if (sizeof($edit->orig) <= $nlead + $ntrail) {
- $block[] = $edit;
- }
- else{
- if ($ntrail) {
- $context = array_slice($edit->orig, 0, $ntrail);
- $block[] = new _DiffOp_Copy($context);
- }
- $this->_block($x0, $ntrail + $xi - $x0,
- $y0, $ntrail + $yi - $y0,
- $block);
- $block = false;
- }
- }
- $context = $edit->orig;
- }
- else {
- if (! is_array($block)) {
- $context = array_slice($context, sizeof($context) - $nlead);
- $x0 = $xi - sizeof($context);
- $y0 = $yi - sizeof($context);
- $block = array();
- if ($context)
- $block[] = new _DiffOp_Copy($context);
+ $this->mCacheHit = true;
+ // Check if the diff should be hidden from this user
+ if ( !$this->loadRevisionData() ) {
+ wfProfileOut( __METHOD__ );
+ return false;
+ } elseif ( $this->mOldRev && !$this->mOldRev->userCan( Revision::DELETED_TEXT ) ) {
+ wfProfileOut( __METHOD__ );
+ return false;
+ } elseif ( $this->mNewRev && !$this->mNewRev->userCan( Revision::DELETED_TEXT ) ) {
+ wfProfileOut( __METHOD__ );
+ return false;
+ }
+ // Short-circuit
+ if ( $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;
}
- $block[] = $edit;
- }
+ } // don't try to load but save the result
+ }
+ $this->mCacheHit = false;
- if ($edit->orig)
- $xi += sizeof($edit->orig);
- if ($edit->closing)
- $yi += sizeof($edit->closing);
+ // Loadtext is permission safe, this just clears out the diff
+ if ( !$this->loadText() ) {
+ wfProfileOut( __METHOD__ );
+ return false;
}
- if (is_array($block))
- $this->_block($x0, $xi - $x0,
- $y0, $yi - $y0,
- $block);
+ $difftext = $this->generateDiffBody( $this->mOldtext, $this->mNewtext );
- $end = $this->_end_diff();
+ // Save to cache for 7 days
+ if ( !wfRunHooks( 'AbortDiffCache', array( &$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 $end;
+ return $difftext;
}
- function _block($xbeg, $xlen, $ybeg, $ylen, &$edits) {
- wfProfileIn( __METHOD__ );
- $this->_start_block($this->_block_header($xbeg, $xlen, $ybeg, $ylen));
- foreach ($edits as $edit) {
- if ($edit->type == 'copy')
- $this->_context($edit->orig);
- elseif ($edit->type == 'add')
- $this->_added($edit->closing);
- elseif ($edit->type == 'delete')
- $this->_deleted($edit->orig);
- elseif ($edit->type == 'change')
- $this->_changed($edit->orig, $edit->closing);
- else
- trigger_error('Unknown edit type', E_USER_ERROR);
- }
- $this->_end_block();
- wfProfileOut( __METHOD__ );
+ /**
+ * 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();
+ wfDl( 'wikidiff2' );
+ wfRestoreWarnings();
+ wfProfileOut( __METHOD__ . '-php_wikidiff2.so' );
+ }
}
- function _start_diff() {
- ob_start();
- }
+ /**
+ * Generate a diff, no caching
+ *
+ * @param $otext String: old text, must be already segmented
+ * @param $ntext String: new text, must be already segmented
+ */
+ function generateDiffBody( $otext, $ntext ) {
+ global $wgExternalDiffEngine, $wgContLang;
- function _end_diff() {
- $val = ob_get_contents();
- ob_end_clean();
- return $val;
- }
+ $otext = str_replace( "\r\n", "\n", $otext );
+ $ntext = str_replace( "\r\n", "\n", $ntext );
- function _block_header($xbeg, $xlen, $ybeg, $ylen) {
- if ($xlen > 1)
- $xbeg .= "," . ($xbeg + $xlen - 1);
- if ($ylen > 1)
- $ybeg .= "," . ($ybeg + $ylen - 1);
+ $this->initDiffEngines();
- return $xbeg . ($xlen ? ($ylen ? 'c' : 'd') : 'a') . $ybeg;
- }
+ 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->unsegmentForDiff( wikidiff_do_diff( $otext, $ntext, 2 ) ) .
+ $this->debug( 'wikidiff1' );
+ }
- function _start_block($header) {
- echo $header . "\n";
- }
+ 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 );
+ wfProfileOut( __METHOD__ );
+ return $difftext;
+ }
- function _end_block() {
+ # 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;
+ $this->debug();
}
- function _lines($lines, $prefix = ' ') {
- foreach ($lines as $line)
- echo "$prefix $line\n";
+ /**
+ * 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",
+ $data ) ) .
+ " -->\n";
}
- function _context($lines) {
- $this->_lines($lines);
+ /**
+ * Replace line numbers with the text in the user's language
+ */
+ function localiseLineNumbers( $text ) {
+ return preg_replace_callback( '/<!--LINE (\d+)-->/',
+ array( &$this, 'localiseLineNumbersCb' ), $text );
}
- function _added($lines) {
- $this->_lines($lines, '>');
- }
- function _deleted($lines) {
- $this->_lines($lines, '<');
+ function localiseLineNumbersCb( $matches ) {
+ global $wgLang;
+ if ( $matches[1] === '1' && $this->mReducedLineNumbers ) return '';
+ return wfMsgExt( 'lineno', 'escape', $wgLang->formatNum( $matches[1] ) );
}
- function _changed($orig, $closing) {
- $this->_deleted($orig);
- echo "---\n";
- $this->_added($closing);
- }
-}
-/**
- * A formatter that outputs unified diffs
- * @ingroup DifferenceEngine
- */
+ /**
+ * 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 '';
+ }
-class UnifiedDiffFormatter extends DiffFormatter {
- var $leading_context_lines = 2;
- var $trailing_context_lines = 2;
+ $oldid = $this->mOldRev->getId();
+ $newid = $this->mNewRev->getId();
+ if ( $oldid > $newid ) {
+ $tmp = $oldid; $oldid = $newid; $newid = $tmp;
+ }
- function _added($lines) {
- $this->_lines($lines, '+');
- }
- function _deleted($lines) {
- $this->_lines($lines, '-');
- }
- function _changed($orig, $closing) {
- $this->_deleted($orig);
- $this->_added($closing);
- }
- function _block_header($xbeg, $xlen, $ybeg, $ylen) {
- return "@@ -$xbeg,$xlen +$ybeg,$ylen @@";
+ $nEdits = $this->mTitle->countRevisionsBetween( $oldid, $newid );
+ if ( $nEdits > 0 ) {
+ $limit = 100;
+ // We use ($limit + 1) so we can detect if there are > 100 authors
+ // in a given revision range. In that case, diff-multi-manyusers is used.
+ $numUsers = $this->mTitle->countAuthorsBetween( $oldid, $newid, $limit + 1 );
+ return self::intermediateEditsMsg( $nEdits, $numUsers, $limit );
+ }
+ return ''; // nothing
}
-}
-/**
- * A pseudo-formatter that just passes along the Diff::$edits array
- * @ingroup DifferenceEngine
- */
-class ArrayDiffFormatter extends DiffFormatter {
- function format($diff) {
- $oldline = 1;
- $newline = 1;
- $retval = array();
- foreach($diff->edits as $edit)
- switch($edit->type) {
- case 'add':
- foreach($edit->closing as $l) {
- $retval[] = array(
- 'action' => 'add',
- 'new'=> $l,
- 'newline' => $newline++
- );
- }
- break;
- case 'delete':
- foreach($edit->orig as $l) {
- $retval[] = array(
- 'action' => 'delete',
- 'old' => $l,
- 'oldline' => $oldline++,
- );
- }
- break;
- case 'change':
- foreach($edit->orig as $i => $l) {
- $retval[] = array(
- 'action' => 'change',
- 'old' => $l,
- 'new' => @$edit->closing[$i],
- 'oldline' => $oldline++,
- 'newline' => $newline++,
- );
- }
- break;
- case 'copy':
- $oldline += count($edit->orig);
- $newline += count($edit->orig);
+ /**
+ * 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 ) {
+ global $wgLang;
+ if ( $numUsers > $limit ) {
+ $msg = 'diff-multi-manyusers';
+ $numUsers = $limit;
+ } else {
+ $msg = 'diff-multi';
}
- return $retval;
+ return wfMsgExt( $msg, 'parseinline',
+ $wgLang->formatnum( $numEdits ), $wgLang->formatnum( $numUsers ) );
}
-}
-/**
- * Additions by Axel Boldt follow, partly taken from diff.php, phpwiki-1.3.3
- *
- */
-
-define('NBSP', ' '); // iso-8859-x non-breaking space.
-
-/**
- * @todo document
- * @private
- * @ingroup DifferenceEngine
- */
-class _HWLDF_WordAccumulator {
- function _HWLDF_WordAccumulator () {
- $this->_lines = array();
- $this->_line = '';
- $this->_group = '';
- $this->_tag = '';
- }
+ /**
+ * Add the header to a diff body
+ */
+ static function addHeader( $diff, $otitle, $ntitle, $multi = '', $notice = '' ) {
+ $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;
+ $multiColspan = 4;
+ } else {
+ $colspan = 1;
+ $multiColspan = 2;
+ }
+ $header .= "
+ <tr valign='top'>
+ <td colspan='$colspan' class='diff-otitle'>{$otitle}</td>
+ <td colspan='$colspan' class='diff-ntitle'>{$ntitle}</td>
+ </tr>";
+
+ if ( $multi != '' ) {
+ $header .= "<tr><td colspan='{$multiColspan}' align='center' class='diff-multi'>{$multi}</td></tr>";
+ }
+ if ( $notice != '' ) {
+ $header .= "<tr><td colspan='{$multiColspan}' align='center'>{$notice}</td></tr>";
+ }
- function _flushGroup ($new_tag) {
- if ($this->_group !== '') {
- if ($this->_tag == 'ins')
- $this->_line .= '<ins class="diffchange diffchange-inline">' .
- htmlspecialchars ( $this->_group ) . '</ins>';
- elseif ($this->_tag == 'del')
- $this->_line .= '<del class="diffchange diffchange-inline">' .
- htmlspecialchars ( $this->_group ) . '</del>';
- else
- $this->_line .= htmlspecialchars ( $this->_group );
- }
- $this->_group = '';
- $this->_tag = $new_tag;
+ return $header . $diff . "</table>";
}
- function _flushLine ($new_tag) {
- $this->_flushGroup($new_tag);
- if ($this->_line != '')
- array_push ( $this->_lines, $this->_line );
- else
- # make empty lines visible by inserting an NBSP
- array_push ( $this->_lines, NBSP );
- $this->_line = '';
+ /**
+ * Use specified text instead of loading from the database
+ */
+ function setText( $oldText, $newText ) {
+ $this->mOldtext = $oldText;
+ $this->mNewtext = $newText;
+ $this->mTextLoaded = 2;
+ $this->mRevisionsLoaded = true;
}
- function addWords ($words, $tag = '') {
- if ($tag != $this->_tag)
- $this->_flushGroup($tag);
-
- foreach ($words as $word) {
- // new-line should only come as first char of word.
- if ($word == '')
- continue;
- if ($word[0] == "\n") {
- $this->_flushLine($tag);
- $word = substr($word, 1);
- }
- assert(!strstr($word, "\n"));
- $this->_group .= $word;
+ /**
+ * 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;
}
- }
- function getLines() {
- $this->_flushLine('~done');
- return $this->_lines;
- }
-}
-
-/**
- * @todo document
- * @private
- * @ingroup DifferenceEngine
- */
-class WordLevelDiff extends MappedDiff {
- const MAX_LINE_LENGTH = 10000;
-
- function WordLevelDiff ($orig_lines, $closing_lines) {
- wfProfileIn( __METHOD__ );
-
- list ($orig_words, $orig_stripped) = $this->_split($orig_lines);
- list ($closing_words, $closing_stripped) = $this->_split($closing_lines);
-
- $this->MappedDiff($orig_words, $closing_words,
- $orig_stripped, $closing_stripped);
- wfProfileOut( __METHOD__ );
- }
+ // Load the new revision object
+ $this->mNewRev = $this->mNewid
+ ? Revision::newFromId( $this->mNewid )
+ : Revision::newFromTitle( $this->mTitle );
+ if ( !$this->mNewRev instanceof Revision )
+ return false;
- function _split($lines) {
- wfProfileIn( __METHOD__ );
+ // 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>";
+ }
- $words = array();
- $stripped = array();
- $first = true;
- foreach ( $lines as $line ) {
- # If the line is too long, just pretend the entire line is one big word
- # This prevents resource exhaustion problems
- if ( $first ) {
- $first = false;
+ // 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 {
- $words[] = "\n";
- $stripped[] = "\n";
+ // No previous revision; mark to show as first-version only.
+ $this->mOldid = false;
+ $this->mOldRev = false;
}
- if ( strlen( $line ) > self::MAX_LINE_LENGTH ) {
- $words[] = $line;
- $stripped[] = $line;
- } else {
- $m = array();
- if (preg_match_all('/ ( [^\S\n]+ | [0-9_A-Za-z\x80-\xff]+ | . ) (?: (?!< \n) [^\S\n])? /xs',
- $line, $m))
- {
- $words = array_merge( $words, $m[0] );
- $stripped = array_merge( $stripped, $m[1] );
- }
- }
- }
- wfProfileOut( __METHOD__ );
- return array($words, $stripped);
- }
-
- function orig () {
- wfProfileIn( __METHOD__ );
- $orig = new _HWLDF_WordAccumulator;
+ } /* elseif ( $this->mOldid === false ) leave mOldRev false; */
- foreach ($this->edits as $edit) {
- if ($edit->type == 'copy')
- $orig->addWords($edit->orig);
- elseif ($edit->orig)
- $orig->addWords($edit->orig, 'del');
+ if ( is_null( $this->mOldRev ) ) {
+ return false;
}
- $lines = $orig->getLines();
- wfProfileOut( __METHOD__ );
- return $lines;
- }
- function closing () {
- wfProfileIn( __METHOD__ );
- $closing = new _HWLDF_WordAccumulator;
+ 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 = Xml::expandAttributes( array( 'title' => $wgUser->getSkin()->titleAttrib( 'undo' ) ) );
+ if ( $editable && !$this->mOldRev->isDeleted( Revision::DELETED_TEXT ) && !$this->mNewRev->isDeleted( Revision::DELETED_TEXT ) ) {
+ $this->mNewtitle .= " (<a href='$newUndo' $htmlTitle>" . $htmlLink . "</a>)";
+ }
- foreach ($this->edits as $edit) {
- if ($edit->type == 'copy')
- $closing->addWords($edit->closing);
- elseif ($edit->closing)
- $closing->addWords($edit->closing, 'ins');
+ 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>';
+ }
}
- $lines = $closing->getLines();
- wfProfileOut( __METHOD__ );
- return $lines;
- }
-}
-
-/**
- * Wikipedia Table style diff formatter.
- * @todo document
- * @private
- * @ingroup DifferenceEngine
- */
-class TableDiffFormatter extends DiffFormatter {
- function TableDiffFormatter() {
- $this->leading_context_lines = 2;
- $this->trailing_context_lines = 2;
- }
-
- public static function escapeWhiteSpace( $msg ) {
- $msg = preg_replace( '/^ /m', ' ', $msg );
- $msg = preg_replace( '/ $/m', ' ', $msg );
- $msg = preg_replace( '/ /', ' ', $msg );
- return $msg;
- }
- function _block_header( $xbeg, $xlen, $ybeg, $ylen ) {
- $r = '<tr><td colspan="2" class="diff-lineno"><!--LINE '.$xbeg."--></td>\n" .
- '<td colspan="2" class="diff-lineno"><!--LINE '.$ybeg."--></td></tr>\n";
- return $r;
- }
-
- function _start_block( $header ) {
- echo $header;
- }
-
- function _end_block() {
- }
-
- function _lines( $lines, $prefix=' ', $color='white' ) {
- }
-
- # HTML-escape parameter before calling this
- function addedLine( $line ) {
- return $this->wrapLine( '+', 'diff-addedline', $line );
- }
-
- # HTML-escape parameter before calling this
- function deletedLine( $line ) {
- return $this->wrapLine( '-', 'diff-deletedline', $line );
- }
-
- # HTML-escape parameter before calling this
- function contextLine( $line ) {
- return $this->wrapLine( ' ', 'diff-context', $line );
+ return true;
}
- private function wrapLine( $marker, $class, $line ) {
- if( $line !== '' ) {
- // The <div> wrapper is needed for 'overflow: auto' style to scroll properly
- $line = Xml::tags( 'div', null, $this->escapeWhiteSpace( $line ) );
+ /**
+ * 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
+ $this->mTextLoaded = 2;
}
- return "<td class='diff-marker'>$marker</td><td class='$class'>$line</td>";
- }
- function emptyLine() {
- return '<td colspan="2"> </td>';
- }
-
- function _added( $lines ) {
- foreach ($lines as $line) {
- echo '<tr>' . $this->emptyLine() .
- $this->addedLine( '<ins class="diffchange">' .
- htmlspecialchars ( $line ) . '</ins>' ) . "</tr>\n";
+ if ( !$this->loadRevisionData() ) {
+ return false;
}
- }
-
- function _deleted($lines) {
- foreach ($lines as $line) {
- echo '<tr>' . $this->deletedLine( '<del class="diffchange">' .
- htmlspecialchars ( $line ) . '</del>' ) .
- $this->emptyLine() . "</tr>\n";
+ if ( $this->mOldRev ) {
+ $this->mOldtext = $this->mOldRev->getText( Revision::FOR_THIS_USER );
+ if ( $this->mOldtext === false ) {
+ return false;
+ }
}
- }
-
- function _context( $lines ) {
- foreach ($lines as $line) {
- echo '<tr>' .
- $this->contextLine( htmlspecialchars ( $line ) ) .
- $this->contextLine( htmlspecialchars ( $line ) ) . "</tr>\n";
+ if ( $this->mNewRev ) {
+ $this->mNewtext = $this->mNewRev->getText( Revision::FOR_THIS_USER );
+ if ( $this->mNewtext === false ) {
+ return false;
+ }
}
+ return true;
}
- function _changed( $orig, $closing ) {
- wfProfileIn( __METHOD__ );
-
- $diff = new WordLevelDiff( $orig, $closing );
- $del = $diff->orig();
- $add = $diff->closing();
-
- # Notice that WordLevelDiff returns HTML-escaped output.
- # Hence, we will be calling addedLine/deletedLine without HTML-escaping.
-
- while ( $line = array_shift( $del ) ) {
- $aline = array_shift( $add );
- echo '<tr>' . $this->deletedLine( $line ) .
- $this->addedLine( $aline ) . "</tr>\n";
+ /**
+ * Load the text of the new revision, not the old one
+ */
+ function loadNewText() {
+ if ( $this->mTextLoaded >= 1 ) {
+ return true;
+ } else {
+ $this->mTextLoaded = 1;
}
- foreach ($add as $line) { # If any leftovers
- echo '<tr>' . $this->emptyLine() .
- $this->addedLine( $line ) . "</tr>\n";
+ if ( !$this->loadRevisionData() ) {
+ return false;
}
- wfProfileOut( __METHOD__ );
+ $this->mNewtext = $this->mNewRev->getText( Revision::FOR_THIS_USER );
+ return true;
}
}
scripts.mit.edu / autoinstalls / mediawiki.git / blobdiff