Wikitech-l August 2008

wikitech-l@lists.wikimedia.org

71 participants
87 discussions

New Project, Link Hooks... Needing some research
by Daniel Friesen 17 Aug '08

17 Aug '08

I've noticed a growing in extensions extending link syntax. (Namely SMW's annotations, and other extensions using Embed:, Video:, or theoretically even Audio: namespaces for embedding things). However all implementations have strong issues. We have an internal parsing of links, however when an extension does something it's customary to use a regex rather than duplicating a small part of the parser. This normally leads to either a limited syntax substandard of what the parser does, or a regex so complex it causes server errors when syntax is a bit broken (missing a trailing ]] ). For that reason I'm looking into adding a new feature for the parser Link Hooks. Basically this would allow an extension to hook into link processing for a Namespace, or a pattern. I plan to support a number of flags (Link/Media callbacks [link modification, vs. embedding], namespace/pattern [ns number, or a special pattern (like SMW's ::)], Multi-params [Pipe separated params rather than one display text], Recursive parameters [Things like Image: where links can be inside parameters], Recursive link text [For patterns which break things up and may contain links]) so it should handle most cases. Unfortunately I hit a snag in the code when dealing with [[Embedablens:Page|Content with [[link|displaytext]] inside]]. I can't provide data to extensions in a sane way. Either plaintext is sent to them, and they work with that (albet breaking things like usual), or I try to split up the |'s which doesn't work with nested things, or I first parse the nested links, but then extensions get a hard to work with mess passed to them as their data. The nice way the preprocessor works with objects has pointed me out that the best way this would work, would probably be to recursively parse the text into link objects, and then do our expansion, also allowing them access in special ways to the tree (Extract as WikiText, HTML, Plain Text). Doing some research into the way the parser handles links at first provided me with good results ([[link [[inside of]] link]] nicely gives you a link to "inside of" with the outside stuff verbatim just as the processor I think of would do). However I ran into an ugly, sticky, mess with image embedding. http://dev.wiki-tools.com/wiki/LinkHook#Old_Tests (Ignore the fact my examples here don't have the frame option) [[Image:File.ext|Caption]] Renders as a image with "Caption" [[Image:File.ext|[[Image:File.ext|Caption]]]] Renders an image inside of another image that has a caption of "Caption". [[Image:File.ext|[[Image:File.ext|[[link]]]]]] Renders [[link]] as a link, the rest is completely verbatim. Honestly, the syntax is inconsistent with itself. If we were trying to stop embeds inside of embeds, then the last one should render as an image, with a link to [[link]] and the other Image: verbatim as a caption. I believe there is a bug about the 2nd case, if anyone has it handy I'd love a link. I hunted through bugzilla but couldn't find it. Some use cases, what's expected would be nice. My issue is that Image links are functionally supposed to be the same as a setLinkHook using the Media, Multi-params, and Recursive parameters options. (Embed but not with : at the start, pipe separated parameters, and parameters can have links inside of them). However, in terms of any extension or anything that would be using setLinkHook, something like that making use of the recursive parameters option would be expecting something different. [[Embed:Title|[[Otherembed:Title]] and [[link]]]] Would actually render as an embed, with two links (since it's inside of another embed the 'Otherembed' reverts to a link). And: [[Embed:Title|[[Otherembed:Title|[[link]]]]]] Would actually render as an embed, with a link to [[link]] and the rest of the caption verbatim. -- ~Daniel Friesen(Dantman, Nadir-Seen-Fire) of: -The Nadir-Point Group (http://nadir-point.com) --It's Wiki-Tools subgroup (http://wiki-tools.com) --The ElectronicMe project (http://electronic-me.org) --Games-G.P.S. (http://ggps.org) -And Wikia ACG on Wikia.com (http://wikia.com/wiki/Wikia_ACG) --Animepedia (http://anime.wikia.com) --Narutopedia (http://naruto.wikia.com)

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Re: [Wikitech-l] [MediaWiki-CVS] SVN: [39515] trunk/phase3/includes/specials/SpecialAllpages.php
by Aryeh Gregor 16 Aug '08

16 Aug '08

On Sat, Aug 16, 2008 at 8:39 PM, <aaron(a)svn.wikimedia.org> wrote: > Revision: 39515 > Author: aaron > Date: 2008-08-17 00:39:46 +0000 (Sun, 17 Aug 2008) > > Log Message: > ----------- > truncate super long pages (bug 15186) RELEASE-NOTES?

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Re: [Wikitech-l] New diff implementation
by roan.kattouw＠home.nl 15 Aug '08

15 Aug '08

---- Guy Van den Broeck <guyvdb(a)gmail.com> schrijft: > r39406 contains a brand new implementation of the diff algorithm (in > PHP). It's in the same family as the previous one but has better > performance and a better heuristic for large diffs. > > This one is actually considerably faster than the old diff. In > attachment I included The attachment seems to have been scrubbed by the mailing list. > benchmark output that I use with some of the > biggest articles on wikipedia and some medium sized ones. It simulates > the actual diff workload with a line based diff first, followed by a > word based diff. The comparison is done between a set of sometimes > distant versions for both the old algorithm as the new one. The > summary in the end concludes that the new implementation is almost 30 > times faster. Faster than what? Then the old PHP DifferenceEngine or then wikidiff2? Roan Kattouw (Catrope)

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New diff implementation
by Guy Van den Broeck 15 Aug '08

15 Aug '08

Hey, I've committed a new diff implementation that I've been working on for the past month. It produces exactly the same results as the previous php implementation but is theoretically of a lower complexity. I have tested its performance on a long list of articles out of the wikipedia top10 in size. I have seen cases where this implementation is slower by an order of magnitude, cases where it is faster and cases where the old diff ran out of memory where this implementation didn't. I can't draw any final conclusions with respect to performance because I don't have a site of considerable size. I'd appreciate it if somebody could test this implementation and compare it to the current php installation. An added feature is that for extremely complex diffs, the new implementation will switch to a greedy heuristic that is faster but produces diffs that are slightly suboptimal. You enable it by setting $wgExternalDiffEngine = 'wikidiff3' Cheers, Guy 2008/8/5 <guyvdb(a)svn.wikimedia.org>: > Revision: 38653 > Author: guyvdb > Date: 2008-08-05 19:40:29 +0000 (Tue, 05 Aug 2008) > > Log Message: > ----------- > Alternative experimental diff implementation. Enable by setting = 'wikidiff3'. > > Modified Paths: > -------------- > trunk/phase3/includes/DifferenceEngine.php > > Added Paths: > ----------- > trunk/phase3/includes/Diff.php > > Added: trunk/phase3/includes/Diff.php > =================================================================== > --- trunk/phase3/includes/Diff.php (rev 0) > +++ trunk/phase3/includes/Diff.php 2008-08-05 19:40:29 UTC (rev 38653) > @@ -0,0 +1,472 @@ > +<?php > +/* Copyright (C) 2008 Guy Van den Broeck <guy(a)guyvdb.eu> > + * > + * This program is free software; you can redistribute it and/or modify > + * it under the terms of the GNU General Public License as published by > + * the Free Software Foundation; either version 2 of the License, or > + * (at your option) any later version. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + * > + * You should have received a copy of the GNU General Public License > + * along with this program; if not, write to the Free Software > + * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. > + * or see http://www.gnu.org/ > + */ > + > +/** > + * Implementation of the Diff algorithm. > + * > + * DO NOT USE ON PRODUCTION SYSTEMS > + * > + * The algorithm is based on the O(NP) LCS algorithm as descibed by Wu et al. in "An O(NP) Sequence Comparison Algorithm" > + * and extended with my own ideas. > + * > + * @return array($from_removed, $to_added) > + * TRUE if the token was removed or added. > + * > + * @author Guy Van den Broeck > + */ > +function wikidiff3_diff(array $from, array $to, $boundRunningTime=FALSE, $max_NP_before_bound = 800000){ > + wfProfileIn( __METHOD__ ); > + > + $m = sizeof($from); > + $n = sizeof($to); > + > + $result_from = array_fill(0,$m,TRUE); > + $result_to = array_fill(0,$n,TRUE); > + > + //reduce the complexity for the next step (intentionally done twice) > + //remove common tokens at the start > + $i=0; > + while($i<$m && $i<$n && $from[$i]===$to[$i]){ > + $result_from[$i] = $result_to[$i] = FALSE; > + unset($from[$i],$to[$i]); > + ++$i; > + } > + > + //remove common tokens at the end > + $j=1; > + while($i+$j<=$m && $i+$j<=$n && $from[$m-$j]===$to[$n-$j]){ > + $result_from[$m-$j] = $result_to[$n-$j] = FALSE; > + unset($from[$m-$j],$to[$n-$j]); > + ++$j; > + } > + > + $newFrom = $newFromIndex = $newTo = $newToIndex = array(); > + > + //remove tokens not in both sequences > + $shared = array_fill_keys($from,FALSE); > + foreach($to as $index => $el){ > + if(array_key_exists($el,$shared)){ > + //keep it > + $shared[$el] = TRUE; > + $newTo[] = $el; > + $newToIndex[] = $index; > + } > + } > + foreach($from as $index => $el){ > + if($shared[$el]){ > + //keep it > + $newFrom[] = $el; > + $newFromIndex[] = $index; > + } > + } > + > + unset($from, $to, $shared); > + > + $m2 = sizeof($newFrom); > + $n2 = sizeof($newTo); > + $offsetx = $offsety = 0; > + $from_inLcs = new InLcs($m2); > + $to_inLcs = new InLcs($n2); > + > + wikidiff3_diffPart($newFrom, $newTo, $from_inLcs, $to_inLcs, $m2, $n2, $offsetx, $offsety, $m2, $boundRunningTime, $max_NP_before_bound); > + > + foreach($from_inLcs->inLcs as $key => $in){ > + if($in){ > + $result_from[$newFromIndex[$key]] = FALSE; > + } > + } > + foreach($to_inLcs->inLcs as $key => $in){ > + if($in){ > + $result_to[$newToIndex[$key]] = FALSE; > + } > + } > + > + wfProfileOut( __METHOD__ ); > + return array($result_from, $result_to); > +} > + > +function wikidiff3_diffPart(array $a, array $b, InLcs $a_inLcs, InLcs $b_inLcs, $m, $n, $offsetx, $offsety, $bestKnownLcs, $boundRunningTime=FALSE, $max_NP_before_bound = 800000){ > + if($bestKnownLcs==0 || $m==0 || $n==0){ > + return; > + } > + > + if($m>$n){ > + return wikidiff3_diffPart($b, $a, $b_inLcs, $a_inLcs, $n, $m, $offsety, $offsetx, $bestKnownLcs, $boundRunningTime, $max_NP_before_bound); > + } > + > + $a_inLcs_sym = &$a_inLcs->inLcs; > + $b_inLcs_sym = &$b_inLcs->inLcs; > + > + //remove common tokens at the start > + while($m>0 && $n>0 && $a[0]===$b[0]){ > + $a_inLcs_sym[$offsetx] = $b_inLcs_sym[$offsety] = TRUE; > + ++$offsetx; ++$offsety; > + --$m; --$n; > + --$bestKnownLcs; > + array_shift($a); > + array_shift($b); > + } > + > + //remove common tokens at the end > + while($m>0 && $n>0 && $a[$m-1]===$b[$n-1]){ > + $a_inLcs_sym[$offsetx+$m-1] = $b_inLcs_sym[$offsety+$n-1] = TRUE; > + --$m; --$n; > + --$bestKnownLcs; > + array_pop($a); > + array_pop($b); > + } > + > + if($bestKnownLcs==0 || $m==0 || $n==0){ > + return; > + } > + if($m>$n){ > + return wikidiff3_diffPart($b, $a, $b_inLcs, $a_inLcs, $n, $m, $offsety, $offsetx, $bestKnownLcs, $boundRunningTime, $max_NP_before_bound); > + } > + > + $delta = $n-$m; > + $delta_plus_1 = $delta+1; > + $delta_min_1 = $delta-1; > + > + $fpForw = $snakeBeginForw = $snakeEndForw = array_fill( 0, $delta_plus_1, -1); > + $lcsSizeForw = $snakekForw = $lcsSizeBack = $snakekBack = array_fill( 0, $delta_plus_1, 0); > + $fpBack = $snakeBeginBack = $snakeEndBack = array_fill( 0, $delta_plus_1, $n); > + $overlap = $delta>1 ? array_fill( 1, $delta_min_1, FALSE) : array(); > + $bestLcsLength = $bestLcsLengthTop = $bestLcsLengthBottom = -1; > + > + if($boundRunningTime){ > + $maxp_before_bound = max((-$delta+sqrt($delta*$delta+($max_NP_before_bound<<2)))>>1,2); > + if($maxp_before_bound>=$m){ > + $boundRunningTime = false; > + unset($maxp_before_bound); > + } > + } > + > + $p=-1; > + $m_min_1 = $m-1; > + $maxp=$m_min_1-$bestLcsLength; > + > + while($p<$maxp){ > + > + if($boundRunningTime && $p>$maxp_before_bound){ > + // bound the running time by stopping early > + if($bestLcsLength>=0){ > + // accept the best LCS thusfar > + break; > + }else{ > + $bestLcsProgressForw = $bestkForw = 0; > + foreach($lcsSizeForw as $k => $localLcsProgress){ > + if($localLcsProgress>$bestLcsProgressForw || ($localLcsProgress==$bestLcsProgressForw && $bestkForw > $k)){ > + $bestLcsProgressForw = $localLcsProgress; > + $bestkForw = $k; > + } > + } > + $bestLcsProgressBack = $bestkBack = 0; > + foreach($lcsSizeBack as $k => $localLcsProgress){ > + if($localLcsProgress>$bestLcsProgressBack || ($localLcsProgress==$bestLcsProgressBack && $bestkBack < $k)){ > + $bestLcsProgressBack = $localLcsProgress; > + $bestkBack = $k; > + } > + } > + if($fpForw[$bestkForw]-$bestkForw>$fpBack[$bestkBack]-$bestkBack){ > + // This is hard, maybe try some more? Can this even happen? A solution will be found soon anyway. > + }else{ > + // lets do this > + $topSnakeStart = $snakeBeginForw[$bestkForw]; > + $topSnakeEnd = $snakeEndForw[$bestkForw]; > + $topSnakek = $snakekForw[$bestkForw]; > + $bestLcsLengthTop = $lcsSizeForw[$bestkBack] + $topSnakeStart - $topSnakeEnd; > + > + $bottomSnakeStart = $snakeEndBack[$bestkBack]+1; > + $bottomSnakeEnd = $snakeBeginBack[$bestkBack]+1; > + $bottomSnakek = $snakekBack[$bestkBack]; > + $bestLcsLengthBottom = $lcsSizeBack[$bestkBack] + $bottomSnakeStart - $bottomSnakeEnd; > + > + if($bottomSnakeStart-$topSnakeEnd>$n*0.6 && ($bottomSnakeStart-$bottomSnakek)-($topSnakeEnd-$topSnakek)>$m*0.6){ > + // cut the sequence from both sides (there isn't enough progress, 60% of the sequence is not covered) > + // also diff the middle now > + if($bottomSnakeEnd>($fpForw[$bestkForw]>>1)){ > + // do the middle diff between the snakes > + wfDebug(" Limiting diff run time from both sides, middle between snakes\n"); > + $m_t = ($bottomSnakeStart-$bottomSnakek)-($topSnakeEnd-$topSnakek); > + $n_t = $bottomSnakeStart-$topSnakeEnd; > + $a_t = array_slice($a, $topSnakeEnd-$topSnakek, $m_t); > + $b_t = array_slice($b, $topSnakeEnd, $n_t); > + $offsetx_t = $offsetx+($topSnakeEnd-$topSnakek); > + $offsety_t = $offsety+$topSnakeEnd; > + }else{ > + // the snake is too early in the sequence, do the middle diff between endpoints of progress > + wfDebug(" Limiting diff run time from both sides, middle between endpoints\n"); > + $m_t = ($fpBack[$bestkBack]+1-$bestkBack)-($fpForw[$bestkForw]-$bestkForw); > + $n_t = $fpBack[$bestkBack]+1-$fpForw[$bestkForw]; > + $a_t = array_slice($a, $fpForw[$bestkForw]-$bestkForw, $m_t); > + $b_t = array_slice($b, $fpForw[$bestkForw], $n_t); > + $offsetx_t = $offsetx+($fpForw[$bestkForw]-$bestkForw); > + $offsety_t = $offsety+$fpForw[$bestkForw]; > + } > + wikidiff3_diffPart($a_t, $b_t, $a_inLcs, $b_inLcs, $m_t, $n_t, $offsetx_t, $offsety_t, $m_t, $boundRunningTime, $max_NP_before_bound); > + }else if(min($n-$bottomSnakeStart, $m-($bottomSnakeStart-$bottomSnakek))>min($topSnakeEnd, $topSnakeEnd-$topSnakek)){ > + // the bottom snake is more interesting > + wfDebug("Limiting diff run time from bottom side\n"); > + $topSnakeStart = $bottomSnakeStart; > + $topSnakeEnd = $bottomSnakeEnd; > + $topSnakek = $bottomSnakek; > + $bestLcsLengthTop = $topSnakeEnd-$topSnakek; > + $bottomSnakeStart = $bottomSnakeEnd; > + }else{ > + // the top snake is more interesting > + wfDebug(" Limiting diff run time from top side\n"); > + $bottomSnakeStart = $topSnakeEnd; > + $bottomSnakeEnd = $topSnakeEnd; > + $bottomSnakek = $topSnakek; > + $bestLcsLengthBottom = $m-($bottomSnakeEnd-$bottomSnakek); > + } > + break; > + } > + } > + } > + ++$p; > + $overlap[-$p] = $overlap[$delta+$p] = FALSE; > + > + $min_p_min_1 = -$p-1; > + $delta_plus_1_plus_p = $delta_plus_1+$p; > + > + // forward > + $fpForw[$min_p_min_1] = $snakeEndForw[$min_p_min_1] = $snakekForw[$min_p_min_1] = $snakeBeginForw[$min_p_min_1] = $fpForw[$delta_plus_1_plus_p] = > + $snakeBeginForw[$delta_plus_1_plus_p] = $snakeEndForw[$delta_plus_1_plus_p] = $snakekForw[$delta_plus_1_plus_p] = -1; > + $lcsSizeForw[$min_p_min_1] = $lcsSizeForw[$delta_plus_1_plus_p] = 0; > + > + $k=-$p; > + do { > + $k_plus_1 = $k+1; > + $k_min_1 = $k-1; > + > + $fpBelow = $fpForw[$k_min_1]+1; > + $fpAbove = $fpForw[$k_plus_1]; > + $y = &$fpForw[$k]; > + if($fpBelow>$fpAbove){ > + $oldy = $y = $fpBelow; > + $lcsSizeForw[$k] = $lcsSizeForw[$k_min_1]; > + $snakeBeginForw[$k] = $snakeBeginForw[$k_min_1]; > + $snakeEndForw[$k] = $snakeEndForw[$k_min_1]; > + $snakekForw[$k] = $snakekForw[$k_min_1]; > + }else{ > + $oldy = $y = $fpAbove; > + $lcsSizeForw[$k] = $lcsSizeForw[$k_plus_1]; > + $snakeBeginForw[$k] = $snakeBeginForw[$k_plus_1]; > + $snakeEndForw[$k] = $snakeEndForw[$k_plus_1]; > + $snakekForw[$k] = $snakekForw[$k_plus_1]; > + } > + $x = $y-$k; > + while($x < $m && $y < $n && $a[$x]===$b[$y]){ > + ++$x; > + ++$y; > + } > + if($y-$oldy>0){ > + $lcsSizeForw[$k] += $y-$oldy; > + $snakeBeginForw[$k] = $oldy; > + $snakeEndForw[$k]= $y; > + $snakekForw[$k] = $k; > + } > + if($y>=$fpBack[$k] && !$overlap[$k]){ > + // there is overlap > + $overlap[$k]=TRUE; > + $lcsLength = $lcsSizeForw[$k]+$lcsSizeBack[$k]; > + if($y>$fpBack[$k]+1){ > + $snakeoverlap = $y-$fpBack[$k]-1; > + $lcsLength -= $snakeoverlap; > + } > + if($lcsLength>$bestLcsLength){ > + // a better sequence found! > + $bestLcsLength = $lcsLength; > + > + $topSnakeStart = $snakeBeginForw[$k]; > + $topSnakeEnd = $snakeEndForw[$k]; > + $topSnakek = $snakekForw[$k]; > + > + // aligned snakes bite (\ ) > + // ( \ \) > + $bottomSnakeStart = max($snakeEndBack[$k]+1, $topSnakeEnd+max(0,$snakekBack[$k]-$snakekForw[$k])); > + $bottomSnakeEnd = max($snakeBeginBack[$k]+1, $bottomSnakeStart); > + $bottomSnakek = $snakekBack[$k]; > + > + if($bottomSnakeEnd<$y){ > + $bottomSnakeStart = $y; > + $bottomSnakeEnd = $y; > + $bottomSnakek = $k; > + } > + > + $bestLcsLengthTop = $lcsSizeForw[$k]-($snakeEndForw[$k]-$snakeBeginForw[$k]); > + $bestLcsLengthBottom = $lcsSizeBack[$k]-($snakeBeginBack[$k]-$snakeEndBack[$k]); > + if($bestKnownLcs==$lcsLength){ > + $fpForw[$k]=$y; > + break 2; > + } > + $maxp=$m_min_1-$bestLcsLength; > + } > + } > + if($k<$delta_min_1){ > + ++$k; > + }else if($k>$delta){ > + --$k; > + }else if($k==$delta_min_1){ > + $k = $delta+$p; > + }else{ > + break; > + } > + } while(TRUE); > + > + // backward > + $fpBack[$min_p_min_1] = $snakeBeginBack[$min_p_min_1] = $snakeEndBack[$min_p_min_1] = $snakekBack[$min_p_min_1] = > + $fpBack[$delta_plus_1_plus_p] = $snakeBeginBack[$delta_plus_1_plus_p] = $snakeEndBack[$delta_plus_1_plus_p] = $snakekBack[$delta_plus_1_plus_p] = $n; > + $lcsSizeBack[$min_p_min_1] = $lcsSizeBack[$delta_plus_1_plus_p] = 0; > + > + $k=$delta+$p; > + do { > + $k_plus_1 = $k+1; > + $k_min_1 = $k-1; > + > + $fpBelow = $fpBack[$k_min_1]; > + $fpAbove = $fpBack[$k_plus_1]-1; > + $y = &$fpBack[$k]; > + if($fpBelow<$fpAbove){ > + $oldy = $y = $fpBelow; > + $lcsSizeBack[$k] = $lcsSizeBack[$k_min_1]; > + $snakeBeginBack[$k] = $snakeBeginBack[$k_min_1]; > + $snakeEndBack[$k] = $snakeEndBack[$k_min_1]; > + $snakekBack[$k] = $snakekBack[$k_min_1]; > + }else{ > + $oldy = $y = $fpAbove; > + $lcsSizeBack[$k] = $lcsSizeBack[$k_plus_1]; > + $snakeBeginBack[$k] = $snakeBeginBack[$k_plus_1]; > + $snakeEndBack[$k] = $snakeEndBack[$k_plus_1]; > + $snakekBack[$k] = $snakekBack[$k_plus_1]; > + } > + $x = $y-$k; > + while($x > -1 && $y > -1 && $a[$x]===$b[$y]){ > + --$x; > + --$y; > + } > + if($oldy-$y>0){ > + $lcsSizeBack[$k] += $oldy-$y; > + $snakeBeginBack[$k] = $oldy; > + $snakeEndBack[$k] = $y; > + $snakekBack[$k] = $k; > + } > + if($fpForw[$k]>=$y && !$overlap[$k]){ > + // there is overlap > + $overlap[$k]=TRUE; > + $lcsLength = $lcsSizeForw[$k]+$lcsSizeBack[$k]; > + if($fpForw[$k]>$y+1){ > + $snakeoverlap = $fpForw[$k]-$y-1; > + $lcsLength -= $snakeoverlap; > + } > + if($lcsLength>$bestLcsLength){ > + // a better sequence found! > + $bestLcsLength = $lcsLength; > + > + $topSnakeStart = $snakeBeginForw[$k]; > + $topSnakeEnd = $snakeEndForw[$k]; > + $topSnakek = $snakekForw[$k]; > + > + // aligned snakes bite (\ ) > + // ( \ \) > + $bottomSnakeStart = max($snakeEndBack[$k]+1, $topSnakeEnd+max(0,$snakekBack[$k]-$snakekForw[$k])); > + $bottomSnakeEnd = max($snakeBeginBack[$k]+1, $bottomSnakeStart); > + $bottomSnakek = $snakekBack[$k]; > + > + if($bottomSnakeEnd<$fpForw[$k]){ > + $bottomSnakeStart = $fpForw[$k]; > + $bottomSnakeEnd = $fpForw[$k]; > + $bottomSnakek = $k; > + } > + > + $bestLcsLengthTop = $lcsSizeForw[$k]-($snakeEndForw[$k]-$snakeBeginForw[$k]); > + $bestLcsLengthBottom = $lcsSizeBack[$k]-($snakeBeginBack[$k]-$snakeEndBack[$k]); > + if($bestKnownLcs==$lcsLength){ > + $fpBack[$k] = $y; > + break 2; > + } > + $maxp=$m_min_1-$bestLcsLength; > + } > + } > + if($k>1){ > + --$k; > + }else if($k<0){ > + ++$k; > + }else if($k==1){ > + $k = -$p; > + }else{ > + break; > + } > + } while(TRUE); > + } > + > + unset($fpForw, $fpBack, $lcsSizeForw, $lcsSizeBack); > + unset($snakeBeginForw, $snakeBeginBack, $snakeEndForw, $snakeEndBack, $snakekForw, $snakekBack); > + unset($overlap); > + > + // Mark snakes as in LCS > + $maxi = $offsetx+$topSnakeEnd-$topSnakek; > + for($i=$offsetx+$topSnakeStart-$topSnakek;$i<$maxi;++$i){ > + $a_inLcs_sym[$i] = TRUE; > + } > + $maxi = $offsety+$topSnakeEnd; > + for($i=$offsety+$topSnakeStart;$i<$maxi;++$i){ > + $b_inLcs_sym[$i] = TRUE; > + } > + $maxi = $offsetx+$bottomSnakeEnd-$bottomSnakek; > + for($i=$offsetx+$bottomSnakeStart-$bottomSnakek;$i<$maxi;++$i){ > + $a_inLcs_sym[$i] = TRUE; > + } > + $maxi = $offsety+$bottomSnakeEnd; > + for($i=$offsety+$bottomSnakeStart;$i<$maxi;++$i){ > + $b_inLcs_sym[$i] = TRUE; > + } > + > + $m_t = $topSnakeStart-$topSnakek; > + $a_t = array_slice($a, 0, $m_t); > + $b_t = array_slice($b, 0, $topSnakeStart); > + > + $m_b = $m-($bottomSnakeEnd-$bottomSnakek); > + $n_b = $n-$bottomSnakeEnd; > + $a_b = array_slice($a, $bottomSnakeEnd-$bottomSnakek, $m_b); > + $b_b = array_slice($b, $bottomSnakeEnd, $n_b); > + > + wikidiff3_diffPart($a_t, $b_t, $a_inLcs, $b_inLcs, $m_t, $topSnakeStart, $offsetx, $offsety, $bestLcsLengthTop, $boundRunningTime, $max_NP_before_bound); > + > + wikidiff3_diffPart($a_b, $b_b, $a_inLcs, $b_inLcs, $m_b, $n_b, $offsetx+($bottomSnakeEnd-$bottomSnakek), $offsety+$bottomSnakeEnd, $bestLcsLengthBottom, $boundRunningTime, $max_NP_before_bound); > +} > + > +class InLcs { > + > + public $inLcs; > + > + function __construct($length){ > + $this->inLcs = $length>0 ? array_fill(0,$length,FALSE): array(); > + } > + > + /** > + * Get the length of the Longest Common Subsequence (computed) > + */ > + public function getLcsLength(){ > + return array_sum($this->inLcs); > + } > + > +} > +?> > \ No newline at end of file > > Modified: trunk/phase3/includes/DifferenceEngine.php > =================================================================== > --- trunk/phase3/includes/DifferenceEngine.php 2008-08-05 19:04:27 UTC (rev 38652) > +++ trunk/phase3/includes/DifferenceEngine.php 2008-08-05 19:40:29 UTC (rev 38653) > @@ -3,6 +3,8 @@ > * @defgroup DifferenceEngine DifferenceEngine > */ > > +require_once( 'Diff.php' ); > + > /** > * Constant to indicate diff cache compatibility. > * Bump this when changing the diff formatting in a way that > @@ -77,7 +79,7 @@ > global $wgUser, $wgOut, $wgUseExternalEditor, $wgUseRCPatrol; > wfProfileIn( __METHOD__ ); > > - # If external diffs are enabled both globally and for the user, > + # If external diffs are enabled both globally and for the user, > # we'll use the application/x-external-editor interface to call > # an external diff tool like kompare, kdiff3, etc. > if($wgUseExternalEditor && $wgUser->getOption('externaldiff')) { > @@ -88,19 +90,19 @@ > $url2=$this->mTitle->getFullURL("action=raw&oldid=".$this->mNewid); > $special=$wgLang->getNsText(NS_SPECIAL); > $control=<<<CONTROL > -[Process] > -Type=Diff text > -Engine=MediaWiki > -Script={$wgServer}{$wgScript} > -Special namespace={$special} > + [Process] > + Type=Diff text > + Engine=MediaWiki > + Script={$wgServer}{$wgScript} > + Special namespace={$special} > > -[File] > -Extension=wiki > -URL=$url1 > + [File] > + Extension=wiki > + URL=$url1 > > -[File 2] > -Extension=wiki > -URL=$url2 > + [File 2] > + Extension=wiki > + URL=$url2 > CONTROL; > echo($control); > return; > @@ -170,15 +172,15 @@ > // Look for an unpatrolled change corresponding to this diff > $db = wfGetDB( DB_SLAVE ); > $change = RecentChange::newFromConds( > - array( > - // Add redundant user,timestamp condition so we can use the existing index > + array( > + // Add 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__ > + ), > + __METHOD__ > ); > if( $change instanceof RecentChange ) { > $rcid = $change->mAttribs['rc_id']; > @@ -190,8 +192,8 @@ > // Build the link > if( $rcid ) { > $patrol = ' <span class="patrollink">[' . $sk->makeKnownLinkObj( > - $this->mTitle, > - wfMsgHtml( 'markaspatrolleddiff' ), > + $this->mTitle, > + wfMsgHtml( 'markaspatrolleddiff' ), > "action=markpatrolled&rcid={$rcid}" > ) . ']</span>'; > } else { > @@ -225,33 +227,33 @@ > if( $wgUser->isAllowed( 'deleterevision' ) ) { > $revdel = SpecialPage::getTitleFor( 'Revisiondelete' ); > if( !$this->mOldRev->userCan( Revision::DELETED_RESTRICTED ) ) { > - // If revision was hidden from sysops > + // If revision was hidden from sysops > $ldel = wfMsgHtml('rev-delundel'); > } else { > $ldel = $sk->makeKnownLinkObj( $revdel, > - wfMsgHtml('rev-delundel'), > + wfMsgHtml('rev-delundel'), > 'target=' . urlencode( $this->mOldRev->mTitle->getPrefixedDbkey() ) . > '&oldid=' . urlencode( $this->mOldRev->getId() ) ); > // Bolden oversighted content > if( $this->mOldRev->isDeleted( Revision::DELETED_RESTRICTED ) ) > - $ldel = "<strong>$ldel</strong>"; > + $ldel = "<strong>$ldel</strong>"; > } > $ldel = "   <tt>(<small>$ldel</small>)</tt> "; > // We don't currently handle well changing the top revision's settings > if( $this->mNewRev->isCurrent() ) { > - // If revision was hidden from sysops > + // If revision was hidden from sysops > $rdel = wfMsgHtml('rev-delundel'); > } else if( !$this->mNewRev->userCan( Revision::DELETED_RESTRICTED ) ) { > - // If revision was hidden from sysops > + // If revision was hidden from sysops > $rdel = wfMsgHtml('rev-delundel'); > } else { > $rdel = $sk->makeKnownLinkObj( $revdel, > - wfMsgHtml('rev-delundel'), > + wfMsgHtml('rev-delundel'), > 'target=' . urlencode( $this->mNewRev->mTitle->getPrefixedDbkey() ) . > '&oldid=' . urlencode( $this->mNewRev->getId() ) ); > // Bolden oversighted content > if( $this->mNewRev->isDeleted( Revision::DELETED_RESTRICTED ) ) > - $rdel = "<strong>$rdel</strong>"; > + $rdel = "<strong>$rdel</strong>"; > } > $rdel = "   <tt>(<small>$rdel</small>)</tt> "; > } > @@ -268,7 +270,7 @@ > $this->showDiff( $oldHeader, $newHeader ); > > if ( !$diffOnly ) > - $this->renderNewRevision(); > + $this->renderNewRevision(); > > wfProfileOut( __METHOD__ ); > } > @@ -283,9 +285,9 @@ > $wgOut->addHTML( "<hr /><h2>{$this->mPagetitle}</h2>\n" ); > #add deleted rev tag if needed > if( !$this->mNewRev->userCan(Revision::DELETED_TEXT) ) { > - $wgOut->addWikiMsg( 'rev-deleted-text-permission' ); > + $wgOut->addWikiMsg( 'rev-deleted-text-permission' ); > } else if( $this->mNewRev->isDeleted(Revision::DELETED_TEXT) ) { > - $wgOut->addWikiMsg( 'rev-deleted-text-view' ); > + $wgOut->addWikiMsg( 'rev-deleted-text-view' ); > } > > if( !$this->mNewRev->isCurrent() ) { > @@ -310,7 +312,7 @@ > $wgOut->addHtml( "\n</pre>\n" ); > } > } else > - $wgOut->addWikiTextTidy( $this->mNewtext ); > + $wgOut->addWikiTextTidy( $this->mNewtext ); > > if( !$this->mNewRev->isCurrent() ) { > $wgOut->parserOptions()->setEditSection( $oldEditSectionSetting ); > @@ -356,9 +358,9 @@ > > $nextlink = $sk->makeKnownLinkObj( $this->mTitle, wfMsgHtml( 'nextdiff' ), 'diff=next&oldid='.$this->mNewid, '', '', 'id="differences-nextlink"' ); > $header = "<div class=\"firstrevisionheader\" style=\"text-align: center\"><strong>{$this->mOldtitle}</strong><br />" . > - $sk->revUserTools( $this->mNewRev ) . "<br />" . > - $sk->revComment( $this->mNewRev ) . "<br />" . > - $nextlink . "</div>\n"; > + $sk->revUserTools( $this->mNewRev ) . "<br />" . > + $sk->revComment( $this->mNewRev ) . "<br />" . > + $nextlink . "</div>\n"; > > $wgOut->addHTML( $header ); > > @@ -423,9 +425,9 @@ > wfProfileIn( __METHOD__ ); > // Check if the diff should be hidden from this user > if ( $this->mOldRev && !$this->mOldRev->userCan(Revision::DELETED_TEXT) ) { > - return ''; > + return ''; > } else if ( $this->mNewRev && !$this->mNewRev->userCan(Revision::DELETED_TEXT) ) { > - return ''; > + return ''; > } > // Cacheable? > $key = false; > @@ -486,7 +488,7 @@ > dl('php_wikidiff.so'); > } > return $wgContLang->unsegementForDiff( wikidiff_do_diff( $otext, $ntext, 2 ) ) . > - $this->debug( 'wikidiff1' ); > + $this->debug( 'wikidiff1' ); > } > > if ( $wgExternalDiffEngine == 'wikidiff2' ) { > @@ -505,7 +507,7 @@ > return $text; > } > } > - if ( $wgExternalDiffEngine !== false ) { > + if ( $wgExternalDiffEngine != 'wikidiff3' && $wgExternalDiffEngine !== false ) { > # Diff via the shell > global $wgTmpDirectory; > $tempName1 = tempnam( $wgTmpDirectory, 'diff_' ); > @@ -541,9 +543,9 @@ > $diffs = new Diff( $ota, $nta ); > $formatter = new TableDiffFormatter(); > return $wgContLang->unsegmentForDiff( $formatter->format( $diffs ) ) . > - $this->debug(); > + $this->debug(); > } > - > + > /** > * Generate a debug comment indicating diff generating time, > * server node, and generator backend. > @@ -556,10 +558,10 @@ > } > $data[] = wfTimestamp( TS_DB ); > return "\n"; > } > > @@ -568,7 +570,7 @@ > */ > function localiseLineNumbers( $text ) { > return preg_replace_callback( '//', > - array( &$this, 'localiseLineNumbersCb' ), $text ); > + array( &$this, 'localiseLineNumbersCb' ), $text ); > } > > function localiseLineNumbersCb( $matches ) { > @@ -582,7 +584,7 @@ > */ > function getMultiNotice() { > if ( !is_object($this->mOldRev) || !is_object($this->mNewRev) ) > - return ''; > + return ''; > > if( !$this->mOldPage->equals( $this->mNewPage ) ) { > // Comparing two different pages? Count would be meaningless. > @@ -597,7 +599,7 @@ > > $n = $this->mTitle->countRevisionsBetween( $oldid, $newid ); > if ( !$n ) > - return ''; > + return ''; > > return wfMsgExt( 'diff-multi', array( 'parseinline' ), $n ); > } > @@ -610,19 +612,19 @@ > global $wgOut; > > $header = " > - <table class='diff'> > - <col class='diff-marker' /> > - <col class='diff-content' /> > - <col class='diff-marker' /> > - <col class='diff-content' /> > - <tr valign='top'> > - <td colspan='2' class='diff-otitle'>{$otitle}</td> > - <td colspan='2' class='diff-ntitle'>{$ntitle}</td> > - </tr> > + <table class='diff'> > + <col class='diff-marker' /> > + <col class='diff-content' /> > + <col class='diff-marker' /> > + <col class='diff-content' /> > + <tr valign='top'> > + <td colspan='2' class='diff-otitle'>{$otitle}</td> > + <td colspan='2' class='diff-ntitle'>{$ntitle}</td> > + </tr> > "; > > if ( $multi != '' ) > - $header .= "<tr><td colspan='4' align='center' class='diff-multi'>{$multi}</td></tr>"; > + $header .= "<tr><td colspan='4' align='center' class='diff-multi'>{$multi}</td></tr>"; > > return $header . $diff . "</table>"; > } > @@ -657,10 +659,10 @@ > > // Load the new revision object > $this->mNewRev = $this->mNewid > - ? Revision::newFromId( $this->mNewid ) > - : Revision::newFromTitle( $this->mTitle ); > + ? Revision::newFromId( $this->mNewid ) > + : Revision::newFromTitle( $this->mTitle ); > if( !$this->mNewRev instanceof Revision ) > - return false; > + return false; > > // Update the new revision ID in case it was 0 (makes life easier doing UI stuff) > $this->mNewid = $this->mNewRev->getId(); > @@ -688,9 +690,9 @@ > $this->mNewtitle .= " (<a href='$newEdit'>" . wfMsgHtml( $editable ? 'editold' : 'viewsourceold' ) . "</a>)"; > } > if ( !$this->mNewRev->userCan(Revision::DELETED_TEXT) ) { > - $this->mNewtitle = "<span class='history-deleted'>{$this->mPagetitle}</span>"; > + $this->mNewtitle = "<span class='history-deleted'>{$this->mPagetitle}</span>"; > } else if ( $this->mNewRev->isDeleted(Revision::DELETED_TEXT) ) { > - $this->mNewtitle = '<span class="history-deleted">'.$this->mNewtitle.'</span>'; > + $this->mNewtitle = '<span class="history-deleted">'.$this->mNewtitle.'</span>'; > } > > // Load the old revision object > @@ -722,7 +724,7 @@ > $this->mOldPagetitle = htmlspecialchars( wfMsg( 'revisionasof', $t ) ); > > $this->mOldtitle = "<a href='$oldLink'>{$this->mOldPagetitle}</a>" > - . " (<a href='$oldEdit'>" . wfMsgHtml( $editable ? 'editold' : 'viewsourceold' ) . "</a>)"; > + . " (<a href='$oldEdit'>" . wfMsgHtml( $editable ? 'editold' : 'viewsourceold' ) . "</a>)"; > // Add an "undo" link > $newUndo = $this->mNewPage->escapeLocalUrl( 'action=edit&undoafter=' . $this->mOldid . '&undo=' . $this->mNewid); > if( $editable && !$this->mOldRev->isDeleted( Revision::DELETED_TEXT ) && !$this->mNewRev->isDeleted( Revision::DELETED_TEXT ) ) { > @@ -730,9 +732,9 @@ > } > > if( !$this->mOldRev->userCan( Revision::DELETED_TEXT ) ) { > - $this->mOldtitle = '<span class="history-deleted">' . $this->mOldPagetitle . '</span>'; > + $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>'; > + $this->mOldtitle = '<span class="history-deleted">' . $this->mOldtitle . '</span>'; > } > } > > @@ -828,7 +830,7 @@ > > function _DiffOp_Copy ($orig, $closing = false) { > if (!is_array($closing)) > - $closing = $orig; > + $closing = $orig; > $this->orig = $orig; > $this->closing = $closing; > } > @@ -892,7 +894,6 @@ > } > } > > - > /** > * Class used internally by Diff to actually compute the diffs. > * > @@ -911,65 +912,77 @@ > * are my own. > * > * Line length limits for robustness added by Tim Starling, 2005-08-31 > + * Alternative implementation added by Guy Van den Broeck, 2008-07-30 > * > - * @author Geoffrey T. Dairiki, Tim Starling > + * @author Geoffrey T. Dairiki, Tim Starling, Guy Van den Broeck > * @private > * @ingroup DifferenceEngine > */ > class _DiffEngine { > + > const MAX_XREF_LENGTH = 10000; > > function diff ($from_lines, $to_lines) { > wfProfileIn( __METHOD__ ); > > + global $wgExternalDiffEngine; > + > $n_from = sizeof($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); > + if($wgExternalDiffEngine == 'wikidiff3'){ > + // wikidiff3 > + list($this->xchanged, $this->ychanged) = wikidiff3_diff($from_lines, $to_lines, TRUE, 100000); > + }else{ > + // old diff > + wfProfileIn( __METHOD__ ." - basicdiff"); > + $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]) > + // 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]) > + $this->xchanged[$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; > - } > + $this->xchanged[$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; > - } > + // 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; > + } > > - for ($yi = $skip; $yi < $n_to - $endskip; $yi++) { > - $line = $to_lines[$yi]; > - if ( ($this->ychanged[$yi] = empty($xhash[$this->_line_hash($line)])) ) > + for ($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)])) ) > + $yhash[$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; > + $this->xv[] = $line; > + $this->xind[] = $xi; > + } > + > + // Find the LCS. > + $this->_compareseq(0, sizeof($this->xv), 0, sizeof($this->yv)); > + wfProfileOut( __METHOD__ ." - basicdiff"); > } > > - // Find the LCS. > - $this->_compareseq(0, sizeof($this->xv), 0, sizeof($this->yv)); > - > // Merge edits when possible > $this->_shift_boundaries($from_lines, $this->xchanged, $this->ychanged); > $this->_shift_boundaries($to_lines, $this->ychanged, $this->xchanged); > @@ -984,28 +997,28 @@ > // Skip matching "snake". > $copy = array(); > while ( $xi < $n_from && $yi < $n_to > - && !$this->xchanged[$xi] && !$this->ychanged[$yi]) { > + && !$this->xchanged[$xi] && !$this->ychanged[$yi]) { > $copy[] = $from_lines[$xi++]; > ++$yi; > } > if ($copy) > - $edits[] = new _DiffOp_Copy($copy); > + $edits[] = new _DiffOp_Copy($copy); > > // Find deletes & adds. > $delete = array(); > while ($xi < $n_from && $this->xchanged[$xi]) > - $delete[] = $from_lines[$xi++]; > + $delete[] = $from_lines[$xi++]; > > $add = array(); > while ($yi < $n_to && $this->ychanged[$yi]) > - $add[] = $to_lines[$yi++]; > + $add[] = $to_lines[$yi++]; > > if ($delete && $add) > - $edits[] = new _DiffOp_Change($delete, $add); > + $edits[] = new _DiffOp_Change($delete, $add); > elseif ($delete) > - $edits[] = new _DiffOp_Delete($delete); > + $edits[] = new _DiffOp_Delete($delete); > elseif ($add) > - $edits[] = new _DiffOp_Add($add); > + $edits[] = new _DiffOp_Add($add); > } > wfProfileOut( __METHOD__ ); > return $edits; > @@ -1022,7 +1035,6 @@ > } > } > > - > /* Divide the Largest Common Subsequence (LCS) of the sequences > * [XOFF, XLIM) and [YOFF, YLIM) into NCHUNKS approximately equally > * sized segments. > @@ -1040,23 +1052,22 @@ > * of the portions it is going to specify. > */ > function _diag ($xoff, $xlim, $yoff, $ylim, $nchunks) { > - wfProfileIn( __METHOD__ ); > $flip = false; > > if ($xlim - $xoff > $ylim - $yoff) { > // Things seems faster (I'm not sure I understand why) > - // when the shortest sequence in X. > - $flip = true; > + // 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]][] = $i; > + for ($i = $ylim - 1; $i >= $yoff; $i--) > + $ymatches[$this->xv[$i]][] = $i; > else > - for ($i = $ylim - 1; $i >= $yoff; $i--) > - $ymatches[$this->yv[$i]][] = $i; > + for ($i = $ylim - 1; $i >= $yoff; $i--) > + $ymatches[$this->yv[$i]][] = $i; > > $this->lcs = 0; > $this->seq[0]= $yoff - 1; > @@ -1068,23 +1079,23 @@ > for ($chunk = 0; $chunk < $nchunks; $chunk++) { > wfProfileIn( __METHOD__ . "-chunk" ); > if ($chunk > 0) > - for ($i = 0; $i <= $this->lcs; $i++) > - $ymids[$i][$chunk-1] = $this->seq[$i]; > + 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; > + 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; > - } > + 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]); > @@ -1100,7 +1111,6 @@ > } > } > } > - wfProfileOut( __METHOD__ . "-chunk" ); > } > > $seps[] = $flip ? array($yoff, $xoff) : array($xoff, $yoff); > @@ -1112,13 +1122,10 @@ > } > $seps[] = $flip ? array($ylim, $xlim) : array($xlim, $ylim); > > - wfProfileOut( __METHOD__ ); > return array($this->lcs, $seps); > } > > function _lcs_pos ($ypos) { > - wfProfileIn( __METHOD__ ); > - > $end = $this->lcs; > if ($end == 0 || $ypos > $this->seq[$end]) { > $this->seq[++$this->lcs] = $ypos; > @@ -1131,9 +1138,9 @@ > while ($beg < $end) { > $mid = (int)(($beg + $end) / 2); > if ( $ypos > $this->seq[$mid] ) > - $beg = $mid + 1; > + $beg = $mid + 1; > else > - $end = $mid; > + $end = $mid; > } > > USE_ASSERTS && assert($ypos != $this->seq[$end]); > @@ -1141,7 +1148,6 @@ > $this->in_seq[$this->seq[$end]] = false; > $this->seq[$end] = $ypos; > $this->in_seq[$ypos] = 1; > - wfProfileOut( __METHOD__ ); > return $end; > } > > @@ -1157,24 +1163,22 @@ > * All line numbers are origin-0 and discarded lines are not counted. > */ > function _compareseq ($xoff, $xlim, $yoff, $ylim) { > - wfProfileIn( __METHOD__ ); > - > // Slide down the bottom initial diagonal. > while ($xoff < $xlim && $yoff < $ylim > - && $this->xv[$xoff] == $this->yv[$yoff]) { > + && $this->xv[$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]) { > + && $this->xv[$xlim - 1] == $this->yv[$ylim - 1]) { > --$xlim; > --$ylim; > } > > if ($xoff == $xlim || $yoff == $ylim) > - $lcs = 0; > + $lcs = 0; > else { > // This is ad hoc but seems to work well. > //$nchunks = sqrt(min($xlim - $xoff, $ylim - $yoff) / 2.5); > @@ -1188,9 +1192,9 @@ > // X and Y sequences have no common subsequence: > // mark all changed. > while ($yoff < $ylim) > - $this->ychanged[$this->yind[$yoff++]] = 1; > + $this->ychanged[$this->yind[$yoff++]] = 1; > while ($xoff < $xlim) > - $this->xchanged[$this->xind[$xoff++]] = 1; > + $this->xchanged[$this->xind[$xoff++]] = 1; > } else { > // Use the partitions to split this problem into subproblems. > reset($seps); > @@ -1200,7 +1204,6 @@ > $pt1 = $pt2; > } > } > - wfProfileOut( __METHOD__ ); > } > > /* Adjust inserts/deletes of identical lines to join changes > @@ -1237,23 +1240,23 @@ > * $other_changed[$j] == false. > */ > while ($j < $other_len && $other_changed[$j]) > - $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++; > + $j++; > } > > if ($i == $len) > - break; > + break; > > $start = $i; > > // Find the end of this run of changes. > while (++$i < $len && $changed[$i]) > - continue; > + continue; > > do { > /* > @@ -1271,10 +1274,10 @@ > $changed[--$start] = 1; > $changed[--$i] = false; > while ($start > 0 && $changed[$start - 1]) > - $start--; > + $start--; > USE_ASSERTS && assert('$j > 0'); > while ($other_changed[--$j]) > - continue; > + continue; > USE_ASSERTS && assert('$j >= 0 && !$other_changed[$j]'); > } > > @@ -1296,14 +1299,14 @@ > $changed[$start++] = false; > $changed[$i++] = 1; > while ($i < $len && $changed[$i]) > - $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++; > + $j++; > } > } > } while ($runlength != $i - $start); > @@ -1317,7 +1320,7 @@ > $changed[--$i] = 0; > USE_ASSERTS && assert('$j > 0'); > while ($other_changed[--$j]) > - continue; > + continue; > USE_ASSERTS && assert('$j >= 0 && !$other_changed[$j]'); > } > } > @@ -1376,7 +1379,7 @@ > function isEmpty () { > foreach ($this->edits as $edit) { > if ($edit->type != 'copy') > - return false; > + return false; > } > return true; > } > @@ -1392,7 +1395,7 @@ > $lcs = 0; > foreach ($this->edits as $edit) { > if ($edit->type == 'copy') > - $lcs += sizeof($edit->orig); > + $lcs += sizeof($edit->orig); > } > return $lcs; > } > @@ -1410,7 +1413,7 @@ > > foreach ($this->edits as $edit) { > if ($edit->orig) > - array_splice($lines, sizeof($lines), 0, $edit->orig); > + array_splice($lines, sizeof($lines), 0, $edit->orig); > } > return $lines; > } > @@ -1428,7 +1431,7 @@ > > foreach ($this->edits as $edit) { > if ($edit->closing) > - array_splice($lines, sizeof($lines), 0, $edit->closing); > + array_splice($lines, sizeof($lines), 0, $edit->closing); > } > return $lines; > } > @@ -1441,21 +1444,21 @@ > function _check ($from_lines, $to_lines) { > wfProfileIn( __METHOD__ ); > if (serialize($from_lines) != serialize($this->orig())) > - trigger_error("Reconstructed original doesn't match", E_USER_ERROR); > + trigger_error("Reconstructed original doesn't match", E_USER_ERROR); > if (serialize($to_lines) != serialize($this->closing())) > - trigger_error("Reconstructed closing doesn't match", E_USER_ERROR); > + trigger_error("Reconstructed closing doesn't match", E_USER_ERROR); > > $rev = $this->reverse(); > if (serialize($to_lines) != serialize($rev->orig())) > - trigger_error("Reversed original doesn't match", E_USER_ERROR); > + trigger_error("Reversed original doesn't match", E_USER_ERROR); > if (serialize($from_lines) != serialize($rev->closing())) > - trigger_error("Reversed closing doesn't match", E_USER_ERROR); > + trigger_error("Reversed closing doesn't match", E_USER_ERROR); > > > $prevtype = 'none'; > foreach ($this->edits as $edit) { > if ( $prevtype == $edit->type ) > - trigger_error("Edit sequence is non-optimal", E_USER_ERROR); > + trigger_error("Edit sequence is non-optimal", E_USER_ERROR); > $prevtype = $edit->type; > } > > @@ -1496,7 +1499,7 @@ > * have the same number of elements as $to_lines. > */ > function MappedDiff($from_lines, $to_lines, > - $mapped_from_lines, $mapped_to_lines) { > + $mapped_from_lines, $mapped_to_lines) { > wfProfileIn( __METHOD__ ); > > assert(sizeof($from_lines) == sizeof($mapped_from_lines)); > @@ -1579,8 +1582,8 @@ > $block[] = new _DiffOp_Copy($context); > } > $this->_block($x0, $ntrail + $xi - $x0, > - $y0, $ntrail + $yi - $y0, > - $block); > + $y0, $ntrail + $yi - $y0, > + $block); > $block = false; > } > } > @@ -1593,21 +1596,21 @@ > $y0 = $yi - sizeof($context); > $block = array(); > if ($context) > - $block[] = new _DiffOp_Copy($context); > + $block[] = new _DiffOp_Copy($context); > } > $block[] = $edit; > } > > if ($edit->orig) > - $xi += sizeof($edit->orig); > + $xi += sizeof($edit->orig); > if ($edit->closing) > - $yi += sizeof($edit->closing); > + $yi += sizeof($edit->closing); > } > > if (is_array($block)) > - $this->_block($x0, $xi - $x0, > - $y0, $yi - $y0, > - $block); > + $this->_block($x0, $xi - $x0, > + $y0, $yi - $y0, > + $block); > > $end = $this->_end_diff(); > wfProfileOut( __METHOD__ ); > @@ -1619,15 +1622,15 @@ > $this->_start_block($this->_block_header($xbeg, $xlen, $ybeg, $ylen)); > foreach ($edits as $edit) { > if ($edit->type == 'copy') > - $this->_context($edit->orig); > + $this->_context($edit->orig); > elseif ($edit->type == 'add') > - $this->_added($edit->closing); > + $this->_added($edit->closing); > elseif ($edit->type == 'delete') > - $this->_deleted($edit->orig); > + $this->_deleted($edit->orig); > elseif ($edit->type == 'change') > - $this->_changed($edit->orig, $edit->closing); > + $this->_changed($edit->orig, $edit->closing); > else > - trigger_error('Unknown edit type', E_USER_ERROR); > + trigger_error('Unknown edit type', E_USER_ERROR); > } > $this->_end_block(); > wfProfileOut( __METHOD__ ); > @@ -1645,9 +1648,9 @@ > > function _block_header($xbeg, $xlen, $ybeg, $ylen) { > if ($xlen > 1) > - $xbeg .= "," . ($xbeg + $xlen - 1); > + $xbeg .= "," . ($xbeg + $xlen - 1); > if ($ylen > 1) > - $ybeg .= "," . ($ybeg + $ylen - 1); > + $ybeg .= "," . ($ybeg + $ylen - 1); > > return $xbeg . ($xlen ? ($ylen ? 'c' : 'd') : 'a') . $ybeg; > } > @@ -1661,7 +1664,7 @@ > > function _lines($lines, $prefix = ' ') { > foreach ($lines as $line) > - echo "$prefix $line\n"; > + echo "$prefix $line\n"; > } > > function _context($lines) { > @@ -1716,40 +1719,40 @@ > $newline = 1; > $retval = array(); > foreach($diff->edits as $edit) > - switch($edit->type) { > - case 'add': > - foreach($edit->closing as $l) { > - $retval[] = array( > + switch($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) { > - $retval[] = array( > + ); > + } > + break; > + case 'delete': > + foreach($edit->orig as $l) { > + $retval[] = array( > 'action' => 'delete', > 'old' => $l, > 'oldline' => $oldline++, > - ); > - } > - break; > - case 'change': > - foreach($edit->orig as $i => $l) { > - $retval[] = array( > + ); > + } > + break; > + case 'change': > + foreach($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); > - } > + ); > + } > + break; > + case 'copy': > + $oldline += count($edit->orig); > + $newline += count($edit->orig); > + } > return $retval; > } > } > @@ -1777,13 +1780,13 @@ > function _flushGroup ($new_tag) { > if ($this->_group !== '') { > if ($this->_tag == 'ins') > - $this->_line .= '<ins class="diffchange diffchange-inline">' . > - htmlspecialchars ( $this->_group ) . '</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>'; > + $this->_line .= '<del class="diffchange diffchange-inline">' . > + htmlspecialchars ( $this->_group ) . '</del>'; > else > - $this->_line .= htmlspecialchars ( $this->_group ); > + $this->_line .= htmlspecialchars ( $this->_group ); > } > $this->_group = ''; > $this->_tag = $new_tag; > @@ -1792,21 +1795,21 @@ > function _flushLine ($new_tag) { > $this->_flushGroup($new_tag); > if ($this->_line != '') > - array_push ( $this->_lines, $this->_line ); > + array_push ( $this->_lines, $this->_line ); > else > - # make empty lines visible by inserting an NBSP > - array_push ( $this->_lines, NBSP ); > + # make empty lines visible by inserting an NBSP > + array_push ( $this->_lines, NBSP ); > $this->_line = ''; > } > > function addWords ($words, $tag = '') { > if ($tag != $this->_tag) > - $this->_flushGroup($tag); > + $this->_flushGroup($tag); > > foreach ($words as $word) { > // new-line should only come as first char of word. > if ($word == '') > - continue; > + continue; > if ($word[0] == "\n") { > $this->_flushLine($tag); > $word = substr($word, 1); > @@ -1837,7 +1840,7 @@ > list ($closing_words, $closing_stripped) = $this->_split($closing_lines); > > $this->MappedDiff($orig_words, $closing_words, > - $orig_stripped, $closing_stripped); > + $orig_stripped, $closing_stripped); > wfProfileOut( __METHOD__ ); > } > > @@ -1862,7 +1865,7 @@ > } else { > $m = array(); > if (preg_match_all('/ ( [^\S\n]+ | [0-9_A-Za-z\x80-\xff]+ | . ) (?: (?!< \n) [^\S\n])? /xs', > - $line, $m)) > + $line, $m)) > { > $words = array_merge( $words, $m[0] ); > $stripped = array_merge( $stripped, $m[1] ); > @@ -1879,9 +1882,9 @@ > > foreach ($this->edits as $edit) { > if ($edit->type == 'copy') > - $orig->addWords($edit->orig); > + $orig->addWords($edit->orig); > elseif ($edit->orig) > - $orig->addWords($edit->orig, 'del'); > + $orig->addWords($edit->orig, 'del'); > } > $lines = $orig->getLines(); > wfProfileOut( __METHOD__ ); > @@ -1894,9 +1897,9 @@ > > foreach ($this->edits as $edit) { > if ($edit->type == 'copy') > - $closing->addWords($edit->closing); > + $closing->addWords($edit->closing); > elseif ($edit->closing) > - $closing->addWords($edit->closing, 'ins'); > + $closing->addWords($edit->closing, 'ins'); > } > $lines = $closing->getLines(); > wfProfileOut( __METHOD__ ); > @@ -1969,24 +1972,24 @@ > function _added( $lines ) { > foreach ($lines as $line) { > echo '<tr>' . $this->emptyLine() . > - $this->addedLine( '<ins class="diffchange">' . > - htmlspecialchars ( $line ) . '</ins>' ) . "</tr>\n"; > + $this->addedLine( '<ins class="diffchange">' . > + htmlspecialchars ( $line ) . '</ins>' ) . "</tr>\n"; > } > } > > function _deleted($lines) { > foreach ($lines as $line) { > echo '<tr>' . $this->deletedLine( '<del class="diffchange">' . > - htmlspecialchars ( $line ) . '</del>' ) . > - $this->emptyLine() . "</tr>\n"; > + htmlspecialchars ( $line ) . '</del>' ) . > + $this->emptyLine() . "</tr>\n"; > } > } > > function _context( $lines ) { > foreach ($lines as $line) { > echo '<tr>' . > - $this->contextLine( htmlspecialchars ( $line ) ) . > - $this->contextLine( htmlspecialchars ( $line ) ) . "</tr>\n"; > + $this->contextLine( htmlspecialchars ( $line ) ) . > + $this->contextLine( htmlspecialchars ( $line ) ) . "</tr>\n"; > } > } > > @@ -2003,11 +2006,11 @@ > while ( $line = array_shift( $del ) ) { > $aline = array_shift( $add ); > echo '<tr>' . $this->deletedLine( $line ) . > - $this->addedLine( $aline ) . "</tr>\n"; > + $this->addedLine( $aline ) . "</tr>\n"; > } > foreach ($add as $line) { # If any leftovers > echo '<tr>' . $this->emptyLine() . > - $this->addedLine( $line ) . "</tr>\n"; > + $this->addedLine( $line ) . "</tr>\n"; > } > wfProfileOut( __METHOD__ ); > } > > > > _______________________________________________ > MediaWiki-CVS mailing list > MediaWiki-CVS(a)lists.wikimedia.org > https://lists.wikimedia.org/mailman/listinfo/mediawiki-cvs >

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Re: [Wikitech-l] [MediaWiki-CVS] SVN: [39314] trunk/phase3
by roan.kattouw＠home.nl 14 Aug '08

14 Aug '08

---- siebrand(a)svn.wikimedia.org schrijft: > Revision: 39314 > Author: siebrand > Date: 2008-08-13 23:08:22 +0000 (Wed, 13 Aug 2008) > > Log Message: > ----------- > (bug 15157) Special:Watchlist now has the same options as Special:Watchlist: > > (snip) > +* (bug 15157) Special:Watchlist has the same options as Special:Watchlist: > + Show/Hide logged in users, Show/Hide anonymous, Invert namespace selection Should this be: "Special:Watchlist has the same options as *Special:Recentchanges*"? Roan Kattouw (Catrope)

3 2

Re: [Wikitech-l] Add new tab into wiki-layout
by roan.kattouw＠home.nl 14 Aug '08

14 Aug '08

---- gbtkjd dgjksbg <the_rock3353(a)yahoo.com> schrijft: > Hello all, > > > > Is it possible to change wiki page layout? > > ex: I want to remove watch tab and add new tab that adds new page. Yes. Write an extension that uses the SkinTemplateContentActions hook [1]. Roan Kattouw (Catrope) [1] http://www.mediawiki.org/wiki/Manual:Hooks/SkinTemplateContentActions

1 0

Re: [Wikitech-l] MediaWiki 1.13.0 released
by roan.kattouw＠home.nl 14 Aug '08

14 Aug '08

---- Tim Starling <tstarling(a)wikimedia.org> schrijft: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > MediaWiki 1.13.0 is now available. Mediawiki-announce automatically forwards to wikitech-l, it seems, so the release announcement was posted twice. Roan Kattouw (Catrope)

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MediaWiki 1.13.0 released
by Tim Starling 14 Aug '08

14 Aug '08

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 MediaWiki 1.13.0 is now available. MediaWiki is now using a "continuous integration" development model with quarterly snapshot releases. The latest development code is always kept "ready to run", and in fact runs our own sites on Wikipedia. MediaWiki 1.13.0 is our latest snapshot release, based on the development code from three weeks ago, with several bugfixes applied. Selected changes since MediaWiki 1.12.0: * 59,000 new localised text messages have been added, taking the total to 266,000, spread across 281 languages * New special pages: FileDuplicateSearch, ListGroupRights * Special:UserRights and Special:SpecialPages have been redesigned * More options on Special:Recentchangeslinked and Special:WhatLinksHere * New parser functions: PAGESINCATEGORY, PAGESIZE * Can hide categories with __HIDDENCAT__ * Friendlier behaviour for users who click a red link but can't edit * Image redirects are now enabled by default * Drop-down AJAX search suggestions ($wgEnableMWSuggest) * Search results show image thumbnails * The search box in the MonoBook sidebar can be moved up by editing [[MediaWiki:Sidebar]] * Double redirects created by a page move can be fixed automatically Changes since release candidate MediaWiki 1.13.0rc2: * (bug 13770) Fixed incorrect detection of PHP's DOM module * Fix regression from r37834: accesskey tooltip hint should be given for the minor edit and watch labels on the edit page. * Updated Chinese simplified/traditional conversion tables Full release notes: http://svn.wikimedia.org/svnroot/mediawiki/tags/REL1_13_0/phase3/RELEASE-NO… ********************************************************************** Download: http://download.wikimedia.org/mediawiki/1.13/mediawiki-1.13.0.tar.gz Patch to previous version (1.13.0rc2) http://download.wikimedia.org/mediawiki/1.13/mediawiki-1.13.0.patch.gz GPG signatures: http://download.wikimedia.org/mediawiki/1.13/mediawiki-1.13.0.tar.gz.sig http://download.wikimedia.org/mediawiki/1.13/mediawiki-1.13.0.patch.gz.sig Public keys: https://secure.wikimedia.org/keys.html SHA-1 checksums: f53f7548510a39fd9f365d3097e8a581fdb14353 mediawiki-1.13.0.tar.gz 7243a2b50edb78b6f1882ff09c0882e771502539 mediawiki-1.13.0.patch.gz MD5 checksums: 6e51cb81fd57d90b870e984688734db6 mediawiki-1.13.0.tar.gz a4880023b196238cb0a77af717b4fd8b mediawiki-1.13.0.patch.gz - -- Tim Starling -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFIpE7CdWgrCOij/sQRAthwAKC9agD3P0CMjXeWTaaHGsmfXvWEfgCfYxSo nKl2tvJq+BT8u16CjPrG3tI= =Jk7Q -----END PGP SIGNATURE-----

1 0

Re: [Wikitech-l] GIFAR vulnerability and commons
by Tim Starling 13 Aug '08

13 Aug '08

peter green wrote: >> Commons seems to be a target for such an attack. Upload is easy, although I'm >> not to sure about the damage potential. I suppose if an administrators >> account would get compromised an applet could be manufactured to mass delete >> content or mass block users. >> >> > If commons is vulnerable all wikimedia wiki's are and there is nothing > that local commons users or admins can really do about this. Mediawiki > should probablly be modified to check for garbage on the end of image > files if it does not already do so. > > Sending this on to wikitech-l so the devs can comment on it. Replied on commons-l and fixed for default MediaWiki installations in r39203. -- Tim Starling

6 10

Re: [Wikitech-l] [MediaWiki-CVS] SVN: [39308] trunk/phase3/includes/specials/SpecialUserlogin.php
by Aryeh Gregor 13 Aug '08

13 Aug '08

On Wed, Aug 13, 2008 at 6:29 PM, <aaron(a)svn.wikimedia.org> wrote: > Log Message: > ----------- > I really don't like the idea of invalid IPs sending these passwords out > . . . > Modified: trunk/phase3/includes/specials/SpecialUserlogin.php > . . . > - if ( '' == $ip ) { $ip = '(Unknown)'; } > + if( !$ip ) { > + return new WikiError( wfMsg( 'badipaddress' ) ); > + } > + #if ( '' == $ip ) { $ip = '(Unknown)'; } Under what circumstances would the $ip ever be invalid? Where $_SERVER['REMOTE_ADDR'] is unset? When might that be? If there's no known circumstance, this chunk of code should just be removed. If there is one, wfGetIP()'s documentation should be updated (but whether this change is reasonable depends on when wfGetIP() might fail). Overall, I have a hard time imagining why a strange IP address should merit blocking e-mail reset requests.

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