--- /dev/null
+<?php
+
+/***************************************************************************\
+ * SPIP, Systeme de publication pour l'internet *
+ * *
+ * Copyright (c) 2001-2011 *
+ * Arnaud Martin, Antoine Pitrou, Philippe Riviere, Emmanuel Saint-James *
+ * *
+ * Ce programme est un logiciel libre distribue sous licence GNU/GPL. *
+ * Pour plus de details voir le fichier COPYING.txt ou l'aide en ligne. *
+\***************************************************************************/
+
+
+if (!defined('_ECRIRE_INC_VERSION')) return;
+
+//
+// LCS (Longest Common Subsequence) en deux versions
+// (ref: http://www2.toki.or.id/book/AlgDesignManual/BOOK/BOOK5/NODE208.HTM)
+
+// Version ultra-simplifiee : chaque chaine est une permutation de l'autre
+// et on passe en parametre un des deux tableaux de correspondances
+// http://doc.spip.org/@lcs_opt
+function lcs_opt($s) {
+ $n = count($s);
+ if (!$n) return array();
+ $paths = array();
+ $paths_ymin = array();
+ $max_len = 0;
+
+ // Insertion des points
+ asort($s);
+ foreach ($s as $y => $c) {
+ for ($len = $max_len; $len > 0; $len--) {
+ if ($paths_ymin[$len] < $y) {
+ $paths_ymin[$len + 1] = $y;
+ $paths[$len + 1] = $paths[$len];
+ $paths[$len + 1][$y] = $c;
+ break;
+ }
+ }
+ if ($len == 0) {
+ $paths_ymin[1] = $y;
+ $paths[1] = array($y => $c);
+ }
+ if ($len + 1 > $max_len) $max_len = $len + 1;
+ }
+ return $paths[$max_len];
+}
+
+// Version normale : les deux chaines n'ont pas ete traitees au prealable
+// par la fonction d'appariement
+// http://doc.spip.org/@lcs
+function lcs($s, $t) {
+ $n = count($s);
+ $p = count($t);
+ if (!$n || !$p) return array(0 => array(), 1 => array());
+ $paths = array();
+ $paths_ymin = array();
+ $max_len = 0;
+ $s_pos = $t_pos = array();
+
+ // Insertion des points
+ foreach ($t as $y => $c) $t_pos[trim($c)][] = $y;
+
+ foreach ($s as $x => $c) {
+ $c = trim($c);
+ if (!isset($t_pos[$c])) continue;
+ krsort($t_pos[$c]);
+ foreach ($t_pos[$c] as $y) {
+ for ($len = $max_len; $len > 0; $len--) {
+ if ($paths_ymin[$len] < $y) {
+ $paths_ymin[$len + 1] = $y;
+ // On construit le resultat sous forme de chaine d'abord,
+ // car les tableaux de PHP sont dispendieux en taille memoire
+ $paths[$len + 1] = $paths[$len]." $x,$y";
+ break;
+ }
+ }
+ if ($len + 1 > $max_len) $max_len = $len + 1;
+ if ($len == 0) {
+ $paths_ymin[1] = $y;
+ $paths[1] = "$x,$y";
+ }
+ }
+ }
+ if ($paths[$max_len]) {
+ $path = explode(" ", $paths[$max_len]);
+ $u = $v = array();
+ foreach ($path as $p) {
+ list($x, $y) = explode(",", $p);
+ $u[$x] = $y;
+ $v[$y] = $x;
+ }
+ return array($u, $v);
+ }
+ return array(0 => array(), 1 => array());
+}
+
+//
+// Generation de diff a plusieurs etages
+//
+
+// http://doc.spip.org/@Diff
+class Diff {
+ var $diff;
+ var $fuzzy;
+
+// http://doc.spip.org/@Diff
+ function Diff($diff) {
+ $this->diff = $diff;
+ $this->fuzzy = true;
+ }
+
+// http://doc.spip.org/@comparer
+ function comparer($new, $old) {
+ $paras = $this->diff->segmenter($new);
+ $paras_old = $this->diff->segmenter($old);
+ if ($this->diff->fuzzy()) {
+ list($trans_rev, $trans) = apparier_paras($paras_old, $paras);
+ $lcs = lcs_opt($trans);
+ $lcs_rev = array_flip($lcs);
+ }
+ else {
+ list($trans_rev, $trans) = lcs($paras_old, $paras);
+ $lcs = $trans;
+ $lcs_rev = $trans_rev;
+ }
+
+ reset($paras_old);
+ reset($paras);
+ reset($lcs);
+ unset($i_old);
+ $fin_old = false;
+ foreach ($paras as $i => $p) {
+ if (!isset($trans[$i])) {
+ // Paragraphe ajoute
+ $this->diff->ajouter($p);
+ continue;
+ }
+ $j = $trans[$i];
+ if (!isset($lcs[$i])) {
+ // Paragraphe deplace
+ $this->diff->deplacer($p, $paras_old[$j]);
+ continue;
+ }
+ if (!$fin_old) {
+ // Paragraphes supprimes jusqu'au paragraphe courant
+ if (!isset($i_old)) {
+ list($i_old, $p_old) = each($paras_old);
+ if (!$p_old) $fin_old = true;
+ }
+ while (!$fin_old && $i_old < $j) {
+ if (!isset($trans_rev[$i_old])) {
+ $this->diff->supprimer($p_old);
+ }
+ unset($i_old);
+ list($i_old, $p_old) = each($paras_old);
+ if (!$p_old) $fin_old = true;
+ }
+ }
+ // Paragraphe n'ayant pas change de place
+ $this->diff->comparer($p, $paras_old[$j]);
+ }
+ // Paragraphes supprimes a la fin du texte
+ if (!$fin_old) {
+ if (!isset($i_old)) {
+ list($i_old, $p_old) = each($paras_old);
+ if (!strlen($p_old)) $fin_old = true;
+ }
+ while (!$fin_old) {
+ if (!isset($trans_rev[$i_old])) {
+ $this->diff->supprimer($p_old);
+ }
+ list($i_old, $p_old) = each($paras_old);
+ if (!$p_old) $fin_old = true;
+ }
+ }
+ if (isset($i_old)) {
+ if (!isset($trans_rev[$i_old])) {
+ $this->diff->supprimer($p_old);
+ }
+ }
+ return $this->diff->resultat();
+ }
+}
+
+// http://doc.spip.org/@DiffTexte
+class DiffTexte {
+ var $r;
+
+// http://doc.spip.org/@DiffTexte
+ function DiffTexte() {
+ $this->r = "";
+ }
+
+// http://doc.spip.org/@_diff
+ function _diff($p, $p_old) {
+ $diff = new Diff(new DiffPara);
+ return $diff->comparer($p, $p_old);
+ }
+
+// http://doc.spip.org/@fuzzy
+ function fuzzy() {
+ return true;
+ }
+// http://doc.spip.org/@segmenter
+ function segmenter($texte) {
+ return separer_paras($texte);
+ }
+
+ // NB : rem=\"diff-\" est un signal pour la fonction "afficher_para_modifies"
+// http://doc.spip.org/@ajouter
+ function ajouter($p) {
+ $p = trim($p);
+ $this->r .= "\n\n\n<div class=\"diff-para-ajoute\" title=\""._T('diff_para_ajoute')."\">".$p."</div rem=\"diff-\">";
+ }
+// http://doc.spip.org/@supprimer
+ function supprimer($p_old) {
+ $p_old = trim($p_old);
+ $this->r .= "\n\n\n<div class=\"diff-para-supprime\" title=\""._T('diff_para_supprime')."\">".$p_old."</div rem=\"diff-\">";
+ }
+// http://doc.spip.org/@deplacer
+ function deplacer($p, $p_old) {
+ $this->r .= "\n\n\n<div class=\"diff-para-deplace\" title=\""._T('diff_para_deplace')."\">";
+ $this->r .= trim($this->_diff($p, $p_old));
+ $this->r .= "</div rem=\"diff-\">";
+ }
+// http://doc.spip.org/@comparer
+ function comparer($p, $p_old) {
+ $this->r .= "\n\n\n".$this->_diff($p, $p_old);
+ }
+
+// http://doc.spip.org/@resultat
+ function resultat() {
+ return $this->r;
+ }
+}
+
+// http://doc.spip.org/@DiffPara
+class DiffPara {
+ var $r;
+
+// http://doc.spip.org/@DiffPara
+ function DiffPara() {
+ $this->r = "";
+ }
+
+// http://doc.spip.org/@_diff
+ function _diff($p, $p_old) {
+ $diff = new Diff(new DiffPhrase);
+ return $diff->comparer($p, $p_old);
+ }
+
+// http://doc.spip.org/@fuzzy
+ function fuzzy() {
+ return true;
+ }
+// http://doc.spip.org/@segmenter
+ function segmenter($texte) {
+ $paras = array();
+ $texte = trim($texte);
+ while (preg_match('/[\.!\?\]]+\s*/u', $texte, $regs)) {
+ $p = strpos($texte, $regs[0]) + strlen($regs[0]);
+ $paras[] = substr($texte, 0, $p);
+ $texte = substr($texte, $p);
+ }
+ if ($texte) $paras[] = $texte;
+ return $paras;
+ }
+
+// http://doc.spip.org/@ajouter
+ function ajouter($p) {
+ $this->r .= "<span class=\"diff-ajoute\" title=\""._T('diff_texte_ajoute')."\">".$p."</span rem=\"diff-\">";
+ }
+// http://doc.spip.org/@supprimer
+ function supprimer($p_old) {
+ $this->r .= "<span class=\"diff-supprime\" title=\""._T('diff_texte_supprime')."\">".$p_old."</span rem=\"diff-\">";
+ }
+// http://doc.spip.org/@deplacer
+ function deplacer($p, $p_old) {
+ $this->r .= "<span class=\"diff-deplace\" title=\""._T('diff_texte_deplace')."\">".$this->_diff($p, $p_old)."</span rem=\"diff-\">";
+ }
+// http://doc.spip.org/@comparer
+ function comparer($p, $p_old) {
+ $this->r .= $this->_diff($p, $p_old);
+ }
+
+// http://doc.spip.org/@resultat
+ function resultat() {
+ return $this->r;
+ }
+}
+
+// http://doc.spip.org/@DiffPhrase
+class DiffPhrase {
+ var $r;
+
+// http://doc.spip.org/@DiffPhrase
+ function DiffPhrase() {
+ $this->r = "";
+ }
+
+// http://doc.spip.org/@fuzzy
+ function fuzzy() {
+ return false;
+ }
+// http://doc.spip.org/@segmenter
+ function segmenter($texte) {
+ $paras = array();
+ if (test_pcre_unicode()) {
+ $punct = '([[:punct:]]|'.plage_punct_unicode().')';
+ $mode = 'u';
+ }
+ else {
+ // Plages de poncutation pour preg_match bugge (ha ha)
+ $punct = '([^\w\s\x80-\xFF]|'.plage_punct_unicode().')';
+ $mode = '';
+ }
+ $preg = '/('.$punct.'+)(\s+|$)|(\s+)('.$punct.'*)/'.$mode;
+ while (preg_match($preg, $texte, $regs)) {
+ $p = strpos($texte, $regs[0]);
+ $l = strlen($regs[0]);
+ $punct = $regs[1] ? $regs[1] : $regs[6];
+ $milieu = "";
+ if ($punct) {
+ // notes
+ if ($punct == '[[') {
+ $avant = substr($texte, 0, $p) . $regs[5] . $punct;
+ $texte = $regs[4] . substr($texte, $p + $l);
+ }
+ else
+ if ($punct == ']]') {
+ $avant = substr($texte, 0, $p) . $regs[5] . $punct;
+ $texte = substr($texte, $p + $l);
+ }
+ // Attacher les raccourcis fermants au mot precedent
+ else
+ if (preg_match(',^[\]}]+$,', $punct)) {
+ $avant = substr($texte, 0, $p) . $regs[5] . $punct;
+ $texte = $regs[4] . substr($texte, $p + $l);
+ }
+ // Attacher les raccourcis ouvrants au mot suivant
+ else if ($regs[5] && preg_match(',^[\[{]+$,', $punct)) {
+ $avant = substr($texte, 0, $p) . $regs[5];
+ $texte = $punct . substr($texte, $p + $l);
+ }
+ // Les autres signes de ponctuation sont des mots a part entiere
+ else {
+ $avant = substr($texte, 0, $p);
+ $milieu = $regs[0];
+ $texte = substr($texte, $p + $l);
+ }
+ }
+ else {
+ $avant = substr($texte, 0, $p + $l);
+ $texte = substr($texte, $p + $l);
+ }
+ if ($avant) $paras[] = $avant;
+ if ($milieu) $paras[] = $milieu;
+ }
+ if ($texte) $paras[] = $texte;
+ return $paras;
+ }
+
+// http://doc.spip.org/@ajouter
+ function ajouter($p) {
+ $this->r .= "<span class=\"diff-ajoute\" title=\""._T('diff_texte_ajoute')."\">".$p."</span rem=\"diff-\"> ";
+ }
+// http://doc.spip.org/@supprimer
+ function supprimer($p_old) {
+ $this->r .= "<span class=\"diff-supprime\" title=\""._T('diff_texte_supprime')."\">".$p_old."</span rem=\"diff-\"> ";
+ }
+// http://doc.spip.org/@comparer
+ function comparer($p, $p_old) {
+ $this->r .= $p;
+ }
+
+// http://doc.spip.org/@resultat
+ function resultat() {
+ return $this->r;
+ }
+}
+
+
+// http://doc.spip.org/@preparer_diff
+function preparer_diff($texte) {
+ include_spip('inc/charsets');
+
+ $charset = $GLOBALS['meta']['charset'];
+ if ($charset == 'utf-8')
+ return unicode_to_utf_8(html2unicode($texte));
+ return unicode_to_utf_8(html2unicode(charset2unicode($texte, $charset, true)));
+}
+
+// http://doc.spip.org/@afficher_diff
+function afficher_diff($texte) {
+ $charset = $GLOBALS['meta']['charset'];
+ if ($charset == 'utf-8') return $texte;
+ return charset2unicode($texte, 'utf-8');
+}
+
+
+?>
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