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-rw-r--r--i18npool/source/search/i18nsearch.component27
-rw-r--r--i18npool/source/search/levdis.cxx373
-rw-r--r--i18npool/source/search/levdis.hxx214
-rw-r--r--i18npool/source/search/textsearch.cxx1567
-rw-r--r--i18npool/source/search/textsearch.hxx161
5 files changed, 2342 insertions, 0 deletions
diff --git a/i18npool/source/search/i18nsearch.component b/i18npool/source/search/i18nsearch.component
new file mode 100644
index 000000000..fe7f48c26
--- /dev/null
+++ b/i18npool/source/search/i18nsearch.component
@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you under the Apache
+ * License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ -->
+
+<component loader="com.sun.star.loader.SharedLibrary" environment="@CPPU_ENV@"
+ xmlns="http://openoffice.org/2010/uno-components">
+ <implementation name="com.sun.star.util.TextSearch_i18n"
+ constructor="i18npool_TextSearch_get_implementation">
+ <service name="com.sun.star.util.TextSearch"/>
+ <service name="com.sun.star.util.TextSearch2"/>
+ </implementation>
+</component>
diff --git a/i18npool/source/search/levdis.cxx b/i18npool/source/search/levdis.cxx
new file mode 100644
index 000000000..dd9f8fbf5
--- /dev/null
+++ b/i18npool/source/search/levdis.cxx
@@ -0,0 +1,373 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you under the Apache
+ * License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+/*
+
+ Weighted Levenshtein Distance
+ including wildcards
+ '*' for any number (0 or more) of arbitrary characters
+ '?' for exactly one arbitrary character
+ escapable with backslash, "\*" or "\?"
+
+ Return:
+ WLD if WLD <= nLimit, else nLimit+1
+
+ or, if bSplitCount:
+ WLD if WLD <= nLimit
+ -WLD if Replace and Insert and Delete <= nLimit
+ else nLimit+1
+
+ Recursive definition of WLD:
+
+ WLD( X(i), Y(j) ) = min( WLD( X(i-1), Y(j-1) ) + p(i,j) ,
+ WLD( X(i) , Y(j-1) ) + q ,
+ WLD( X(i-1), Y(j) ) + r )
+
+ X(i) := the first i characters of the word X
+ Y(j) := the first j characters of the word Y
+ p(i,j) := 0 if i-th character of X == j-th character of Y,
+ p else
+
+ Boundary conditions:
+ WLD( X(0), Y(j) ) := j*q (Y created by j inserts)
+ WLD( X(i), Y(0) ) := i*r (Y created by i deletes)
+ WLD( X(0), Y(0) ) := 0
+
+ Instead of recursions a dynamic algorithm is used.
+
+ See also: German computer magazine
+ c't 07/89 pages 192-208 and c't 03/94 pages 230-239
+*/
+
+#include <algorithm>
+#include <numeric>
+
+#include "levdis.hxx"
+
+#define LEVDISBIG (nLimit + 1) // Return value if distance > nLimit
+#define LEVDISDOUBLEBUF 2048 // no doubling atop this border
+
+static sal_Int32 Impl_WLD_StringLen( const sal_Unicode* pStr )
+{
+ const sal_Unicode* pTempStr = pStr;
+ while( *pTempStr )
+ pTempStr++;
+ return static_cast<sal_Int32>(pTempStr-pStr);
+}
+
+// Distance from string to pattern
+int WLevDistance::WLD( const sal_Unicode* cString, sal_Int32 nStringLen )
+{
+ int nSPMin = 0; // penalty point Minimum
+ int nRepS = 0; // for SplitCount
+
+ // length difference between pattern and string
+ int nLenDiff = nPatternLen - nStars - nStringLen;
+ // more insertions or deletions necessary as the limit? Then leave
+ if ( (nLenDiff * nInsQ0 > nLimit)
+ || ((nStars == 0) && (nLenDiff * nDelR0 < -nLimit)) )
+ return LEVDISBIG;
+
+ // comparative String greater than instantaneous array
+ // -> adapt array size
+ if ( nStringLen >= nArrayLen )
+ {
+ // increase size much more to avoid reallocation
+ if ( nStringLen < LEVDISDOUBLEBUF )
+ nArrayLen = 2 * nStringLen;
+ else
+ nArrayLen = nStringLen + 1;
+ npDistance = aDisMem.NewMem( nArrayLen );
+ }
+
+ // Calculate start values of the second column (first pattern value).
+ // First column (0-Len pattern) is always zero .. nStringLen * nInsQ0,
+ // therefore the minimum is 0
+ if ( nPatternLen == 0 )
+ {
+ // Count of deletions to reach pattern
+ for ( sal_Int32 i=0; i <= nStringLen; i++ )
+ npDistance[i] = i * nDelR0;
+ }
+ else if ( cpPattern[0] == '*' && bpPatIsWild[0] )
+ {
+ // instead of a '*' you can fit in anything
+ for ( sal_Int32 i=0; i <= nStringLen; i++ )
+ npDistance[i] = 0;
+ }
+ else
+ {
+ sal_Unicode c;
+ int nP;
+ c = cpPattern[0];
+ if ( c == '?' && bpPatIsWild[0] )
+ nP = 0; // a '?' could be any character.
+ else
+ // Minimum of replacement and deletion+insertion weighting
+ nP = std::min({ nRepP0, nRepP0, nDelR0 + nInsQ0 });
+ npDistance[0] = nInsQ0; // start with simple insert
+ npDistance[1] = nInsQ0;
+ npDistance[2] = nInsQ0;
+ int nReplacePos = -1; // tristate flag
+ int nDelCnt = 0;
+ for ( sal_Int32 i=1; i <= nStringLen; i++, nDelCnt += nDelR0 )
+ {
+ if ( cString[i-1] == c )
+ nP = 0; // Replace from this position is 0
+ // Deletions to match pattern + Replace
+ npDistance[i] = nDelCnt + nP;
+ if ( bSplitCount )
+ {
+ if ( nReplacePos < 0 && nP )
+ { // this position will be replaced
+ nRepS++;
+ nReplacePos = i;
+ }
+ else if ( nReplacePos > 0 && !nP )
+ {
+ // same count of c
+ int nBalance = levdisbalance( 0, i-1, c, cString, nStringLen );
+ if ( !nBalance )
+ { // one was replaced that was an insertion instead
+ nRepS--;
+ nReplacePos = 0;
+ }
+ }
+ }
+ }
+ nSPMin = std::min({ npDistance[0], npDistance[1], npDistance[2] });
+ }
+
+ // calculate distance matrix
+ sal_Int32 j = 0; // for all columns of the pattern, till limit is not reached
+ while ( (j < nPatternLen-1)
+ && nSPMin <= (bSplitCount ? 2 * nLimit : nLimit) )
+ {
+ sal_Unicode c;
+ int nP, nQ, nR, nPij, d2;
+
+ j++;
+ c = cpPattern[j];
+ if ( bpPatIsWild[j] ) // '*' or '?' not escaped
+ nP = 0; // could be replaced without penalty
+ else
+ nP = nRepP0;
+ if ( c == '*' && bpPatIsWild[j] )
+ {
+ nQ = 0; // insertion and deletion without penalty
+ nR = 0;
+ }
+ else
+ {
+ nQ = nInsQ0; // usual weighting
+ nR = nDelR0;
+ }
+ d2 = npDistance[0];
+ // increase insert count to get from null string to pattern
+ npDistance[0] = npDistance[0] + nQ;
+ nSPMin = npDistance[0];
+ int nReplacePos = -1; // tristate flag
+ // for each pattern column run through the string
+ for ( sal_Int32 i=1; i <= nStringLen; i++ )
+ {
+ int d1 = d2; // WLD( X(i-1), Y(j-1) )
+ d2 = npDistance[i]; // WLD( X(i) , Y(j-1) )
+ if ( cString[i-1] == c )
+ {
+ nPij = 0; // p(i,j)
+ if ( nReplacePos < 0 )
+ {
+ // same count of c
+ int nBalance = levdisbalance( j, i-1, c, cString, nStringLen );
+ if ( !nBalance )
+ nReplacePos = 0; // no replacement
+ }
+ }
+ else
+ nPij = nP;
+ // WLD( X(i), Y(j) ) = min( WLD( X(i-1), Y(j-1) ) + p(i,j) ,
+ // WLD( X(i) , Y(j-1) ) + q ,
+ // WLD( X(i-1), Y(j) ) + r )
+ npDistance[i] = std::min({ d1 + nPij, d2 + nQ, npDistance[i-1] + nR });
+ if ( npDistance[i] < nSPMin )
+ nSPMin = npDistance[i];
+ if ( bSplitCount )
+ {
+ if ( nReplacePos < 0 && nPij && npDistance[i] == d1 + nPij )
+ { // this position will be replaced
+ nRepS++;
+ nReplacePos = i;
+ }
+ else if ( nReplacePos > 0 && !nPij )
+ {
+ // character is equal in string and pattern
+ //
+ // If from this point:
+ // * pattern and string have the same count of this
+ // character
+ // * and character count is the same before this position
+ // then the replace was none.
+ //
+ // Scrambled letters are recognized here and the nRepS
+ // replacement is withdrawn, whereby the double limit kicks
+ // in.
+
+ // Same count of c
+ int nBalance = levdisbalance( j, i-1, c, cString, nStringLen );
+ if ( !nBalance )
+ { // one was replaced that was an insertion instead
+ nRepS--;
+ nReplacePos = 0;
+ }
+ }
+ }
+ }
+ }
+ if ( (nSPMin <= nLimit) && (npDistance[nStringLen] <= nLimit) )
+ return npDistance[nStringLen];
+ else
+ {
+ if ( bSplitCount )
+ {
+ if ( nRepS && nLenDiff > 0 )
+ nRepS -= nLenDiff; // Inserts were counted
+ if ( (nSPMin <= 2 * nLimit)
+ && (npDistance[nStringLen] <= 2 * nLimit)
+ && (nRepS * nRepP0 <= nLimit) )
+ return -npDistance[nStringLen];
+ return LEVDISBIG;
+ }
+ return LEVDISBIG;
+ }
+}
+
+// Calculating nLimit, nReplP0, nInsQ0, nDelR0, bSplitCount
+// from user values nOtherX, nShorterY, nLongerZ, bRelaxed
+void WLevDistance::CalcLPQR( int nX, int nY, int nZ, bool bRelaxed )
+{
+ if ( nX < 0 ) nX = 0; // only positive values
+ if ( nY < 0 ) nY = 0;
+ if ( nZ < 0 ) nZ = 0;
+ if (0 == std::min({ nX, nY, nZ })) // at least one 0
+ {
+ int nMid, nMax;
+ nMax = std::max({ nX, nY, nZ }); // either 0 for three 0s or Max
+ if ( 0 == (nMid = Mid3( nX, nY, nZ )) ) // even two 0
+ nLimit = nMax; // either 0 or the only one >0
+ else // one is 0
+ nLimit = std::lcm( nMid, nMax );
+ }
+ else // all three of them are not 0
+ nLimit = std::lcm(std::lcm(nX, nY), nZ);
+ nRepP0 = ( nX ? nLimit / nX : nLimit + 1 );
+ nInsQ0 = ( nY ? nLimit / nY : nLimit + 1 );
+ nDelR0 = ( nZ ? nLimit / nZ : nLimit + 1 );
+ bSplitCount = bRelaxed;
+}
+
+// The value in the middle
+int WLevDistance::Mid3( int x, int y, int z )
+{
+ int min = std::min({ x, y, z });
+ if ( x == min )
+ return std::min(y, z);
+ else if ( y == min )
+ return std::min(x, z);
+ else // z == min
+ return std::min(x, y);
+}
+
+// initialize data from CTOR
+void WLevDistance::InitData( const sal_Unicode* cPattern )
+{
+ cpPattern = aPatMem.GetcPtr();
+ bpPatIsWild = aPatMem.GetbPtr();
+ npDistance = aDisMem.GetPtr();
+ nStars = 0;
+ const sal_Unicode* cp1 = cPattern;
+ sal_Unicode* cp2 = cpPattern;
+ bool* bp = bpPatIsWild;
+ // copy pattern, count asterisks, escaped Jokers
+ while ( *cp1 )
+ {
+ if ( *cp1 == '\\' ) // maybe escaped
+ {
+ if ( *(cp1+1) == '*' || *(cp1+1) == '?' ) // next Joker?
+ {
+ cp1++; // skip '\\'
+ nPatternLen--;
+ }
+ *bp++ = false;
+ }
+ else if ( *cp1 == '*' || *cp1 == '?' ) // Joker
+ {
+ if ( *cp1 == '*' )
+ nStars++;
+ *bp++ = true;
+ }
+ else
+ *bp++ = false;
+ *cp2++ = *cp1++;
+ }
+ *cp2 = '\0';
+}
+
+WLevDistance::WLevDistance( const sal_Unicode* cPattern,
+ int nOtherX, int nShorterY, int nLongerZ,
+ bool bRelaxed ) :
+ nPatternLen( Impl_WLD_StringLen(cPattern) ),
+ aPatMem( nPatternLen + 1 ),
+ nArrayLen( nPatternLen + 1 ),
+ aDisMem( nArrayLen )
+{
+ InitData( cPattern );
+ CalcLPQR( nOtherX, nShorterY, nLongerZ, bRelaxed );
+}
+
+// CopyCTor
+WLevDistance::WLevDistance( const WLevDistance& rWLD ) :
+ nPatternLen( rWLD.nPatternLen ),
+ aPatMem( nPatternLen + 1 ),
+ nArrayLen( nPatternLen + 1 ),
+ aDisMem( nArrayLen ),
+ nLimit( rWLD.nLimit ),
+ nRepP0( rWLD.nRepP0 ),
+ nInsQ0( rWLD.nInsQ0 ),
+ nDelR0( rWLD.nDelR0 ),
+ nStars( rWLD.nStars ),
+ bSplitCount( rWLD.bSplitCount )
+{
+ cpPattern = aPatMem.GetcPtr();
+ bpPatIsWild = aPatMem.GetbPtr();
+ npDistance = aDisMem.GetPtr();
+ sal_Int32 i;
+ for ( i=0; i<nPatternLen; i++ )
+ {
+ cpPattern[i] = rWLD.cpPattern[i];
+ bpPatIsWild[i] = rWLD.bpPatIsWild[i];
+ }
+ cpPattern[i] = '\0';
+}
+
+// DTor
+WLevDistance::~WLevDistance()
+{
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/i18npool/source/search/levdis.hxx b/i18npool/source/search/levdis.hxx
new file mode 100644
index 000000000..c58fba842
--- /dev/null
+++ b/i18npool/source/search/levdis.hxx
@@ -0,0 +1,214 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you under the Apache
+ * License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_I18NPOOL_SOURCE_SEARCH_LEVDIS_HXX
+#define INCLUDED_I18NPOOL_SOURCE_SEARCH_LEVDIS_HXX
+
+#include <sal/types.h>
+#include <memory>
+
+// Sensible default values for a user interface could be:
+// LEVDISDEFAULT_XOTHER 2
+// Maximum X replacements to match query, found data may be different by X
+// characters from query.
+// LEVDISDEFAULT_YSHORTER 1
+// Maximum Y insertions to match query, found data may be Y characters
+// shorter than query.
+// LEVDISDEFAULT_ZLONGER 3
+// Maximum Z deletions to match query, found data may be Z characters
+// longer than query.
+// LEVDISDEFAULT_RELAXED TRUE
+// Use relaxed SplitCount instead of mathematical WLD.
+//
+// Joker/wildcards ('?' and '*') of course do not count as
+// replacement/insertion/deletion. At a '?' a replacement is not counted, for a
+// '*' the found data may be any number of characters longer than the query.
+//
+// Strict mathematical WLD: EITHER maximum X replacements OR Y characters
+// shorter OR Z characters longer.
+// Relaxed SplitCount: maximum X replacements AND/OR Y character shorter AND/OR
+// Z characters longer. Any combination of actions is valid.
+//
+// The value range for X,Y,Z is 0..33 to keep the limit within a 16 bit signed
+// integer, 31*32*33 is the maximum limit, LCM(31,32,33) == 32736.
+//
+// The corresponding internal default weigh values for these user interface
+// values would be:
+// LEVDISDEFAULTLIMIT 6
+// Default nLimit, matches x=2, y=1, z=3, p=3, q=6, r=2
+// LEVDISDEFAULT_P0 3
+// Default nRepP0, weight of replacements.
+// LEVDISDEFAULT_Q0 6
+// Default nInsQ0, weight of insertions.
+// LEVDISDEFAULT_R0 2
+// Default nDelR0, weight of deletions.
+
+// The transformation of user input values to weighs is done using CalcLPQR().
+// One caveat, if the WLD reaches nLimit due to nDelR0 (i.e. data string is nZ
+// characters longer than pattern) then no character can be replaced any more.
+// This can be circumvented by increasing nX or/and nZ, but of course with the
+// side effect of being less strict then... or the other solution is to use
+// relaxed SplitCount (see below), which is the default when using CalcLPQR().
+//
+// Attention: shorter = WLD.Insert, longer = WLD.Delete
+//
+// View and counting is always from data string to pattern, a deletion means
+// that something is deleted from data to match pattern.
+//
+// Deletions weigh less in this example because usually less is known than is
+// searched for. Replacements get middle weight, for example because of
+// misspellings. Insertions are expensive.
+//
+// Another example: P0 = 1, Q0 = 4, R0 = 4, Limit = 3
+// Allowed are maximum 4 replacements, no insertion, no deletion.
+// Matches the user interface values X = 3, Y = 0, Z = 0
+//
+// bSplitCount: if TRUE, Rep/Ins/Del are counted differently. The return value
+// of WLD() then isn't necessarily the Levenshtein-Distance, but can be
+// negative (-WLD) if the WLD is greater than nLimit but single values are
+// within the limits.
+// For the above default values that could mean: even if the found string is
+// already 2 characters longer (nLongerZ), 3 replacements (nOtherX) can be made
+// to reach pattern. Additionally, character swaps count as one replacement.
+// Mathematically completely incorrect, but meets user expectations ;-)
+//
+// Explanation: in the real WLD all actions are withdrawn from a common 100%
+// pool, if one gets all there's nothing left for others. With bSplitCount
+// replacements have their own pool.
+
+
+/** "Safe" memory allocation in ctor */
+class WLevDisPatternMem
+{
+ std::unique_ptr<sal_Unicode[]> cp;
+ std::unique_ptr<bool[]> bp;
+public:
+ explicit WLevDisPatternMem( sal_Int32 s )
+ : cp(new sal_Unicode[s])
+ , bp(new bool[s])
+ {
+ }
+
+ sal_Unicode* GetcPtr() const { return cp.get(); }
+ bool* GetbPtr() const { return bp.get(); }
+};
+
+class WLevDisDistanceMem
+{
+ std::unique_ptr<int[]> p;
+public:
+ explicit WLevDisDistanceMem( size_t s )
+ {
+ NewMem(s);
+ }
+ int* GetPtr() const { return p.get(); }
+ int* NewMem( size_t s )
+ {
+ p.reset(new int[ s<3 ? 3 : s ]);
+ return p.get();
+ }
+};
+
+/** Weighted Levenshtein Distance (WLD)
+
+ For a more detailed explanation see documentation in
+ i18npool/source/search/levdis.hxx
+ */
+class WLevDistance
+{
+ sal_Int32 nPatternLen; ///< length of pattern
+ WLevDisPatternMem aPatMem; ///< manage allocation of pattern array
+ sal_Unicode* cpPattern; ///< pointer to pattern array
+ bool* bpPatIsWild; ///< pointer to bool array whether pattern is wildcard
+ sal_Int32 nArrayLen; ///< length of distance array
+ WLevDisDistanceMem aDisMem; ///< manage allocation of distance array
+ int* npDistance; ///< pointer to distance array
+ int nLimit; ///< WLD limit replacements/insertions/deletions
+ int nRepP0; ///< replacement weigh
+ int nInsQ0; ///< insertion weigh
+ int nDelR0; ///< deletion weigh
+ int nStars; ///< count of '*' wildcards in pattern
+ bool bSplitCount; ///< if TRUE, Rep/Ins/Del are counted separately
+
+ void InitData( const sal_Unicode* cPattern );
+ static int Mid3( int x, int y, int z ); ///< middle value of 3 values
+
+public:
+
+ /** CTor with user input. Internally calls CalcLPQR().
+
+ After this, obtain the resulting limit using GetLimit().
+
+ @param bRelaxed the mathematically incorrect method is default (TRUE)
+ */
+ WLevDistance( const sal_Unicode* cPattern, int nOtherX, int nShorterY,
+ int nLongerZ, bool bRelaxed );
+
+ WLevDistance( const WLevDistance& rWLD );
+ ~WLevDistance();
+
+ /** Calculate the Weighted Levenshtein Distance from string to pattern. */
+ int WLD( const sal_Unicode* cString, sal_Int32 nStringLen );
+
+ /** Calculate the internal weighs corresponding to the user input values.
+ @returns nLimit for later comparison with WLD()
+ */
+ void CalcLPQR( int nOtherX, int nShorterY, int nLongerZ,
+ bool bRelaxed );
+
+ int GetLimit() const { return nLimit; }
+
+ // Calculate current balance, keep this inline for performance reasons!
+ // c == cpPattern[jj] == cString[ii]
+ // First seek up to found place, if the balance is still equal there then
+ // also compare after the found place.
+ int levdisbalance(sal_Int32 jj, sal_Int32 ii, sal_Unicode c, const sal_Unicode* cString, sal_Int32 nStringLen) const
+ {
+ int nBalance = 0;
+
+ if ( jj != ii )
+ {
+ sal_Int32 k;
+ if ( jj > 0 )
+ for ( k=0; k < jj; k++ )
+ if ( cpPattern[k] == c )
+ nBalance++;
+ if ( ii > 0 )
+ for ( k=0; k < ii; k++ )
+ if ( cString[k] == c )
+ nBalance--;
+ if ( !nBalance )
+ {
+ for ( k=jj+1; k < nPatternLen; k++ )
+ if ( cpPattern[k] == c )
+ nBalance++;
+ for ( k=ii+1; k < nStringLen; k++ )
+ if ( cString[k] == c )
+ nBalance--;
+ }
+ }
+
+ return nBalance;
+ }
+};
+
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/i18npool/source/search/textsearch.cxx b/i18npool/source/search/textsearch.cxx
new file mode 100644
index 000000000..a16c3e1cc
--- /dev/null
+++ b/i18npool/source/search/textsearch.cxx
@@ -0,0 +1,1567 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you under the Apache
+ * License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include "textsearch.hxx"
+#include "levdis.hxx"
+#include <com/sun/star/i18n/BreakIterator.hpp>
+#include <com/sun/star/util/SearchAlgorithms2.hpp>
+#include <com/sun/star/util/SearchFlags.hpp>
+#include <com/sun/star/i18n/WordType.hpp>
+#include <com/sun/star/i18n/ScriptType.hpp>
+#include <com/sun/star/i18n/CharacterIteratorMode.hpp>
+#include <com/sun/star/i18n/CharacterClassification.hpp>
+#include <com/sun/star/i18n/KCharacterType.hpp>
+#include <com/sun/star/i18n/Transliteration.hpp>
+#include <cppuhelper/supportsservice.hxx>
+#include <cppuhelper/weak.hxx>
+#include <i18nutil/transliteration.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <sal/log.hxx>
+
+#include <unicode/regex.h>
+
+using namespace ::com::sun::star::util;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::lang;
+using namespace ::com::sun::star::i18n;
+using namespace ::com::sun::star;
+
+const TransliterationFlags COMPLEX_TRANS_MASK =
+ TransliterationFlags::ignoreBaFa_ja_JP |
+ TransliterationFlags::ignoreIterationMark_ja_JP |
+ TransliterationFlags::ignoreTiJi_ja_JP |
+ TransliterationFlags::ignoreHyuByu_ja_JP |
+ TransliterationFlags::ignoreSeZe_ja_JP |
+ TransliterationFlags::ignoreIandEfollowedByYa_ja_JP |
+ TransliterationFlags::ignoreKiKuFollowedBySa_ja_JP |
+ TransliterationFlags::ignoreProlongedSoundMark_ja_JP;
+
+namespace
+{
+TransliterationFlags maskComplexTrans( TransliterationFlags n )
+{
+ // IGNORE_KANA and FULLWIDTH_HALFWIDTH are simple but need to take effect
+ // in complex transliteration.
+ return
+ n & (COMPLEX_TRANS_MASK | // all set ignore bits
+ TransliterationFlags::IGNORE_KANA | // plus IGNORE_KANA bit
+ TransliterationFlags::FULLWIDTH_HALFWIDTH); // and the FULLWIDTH_HALFWIDTH value
+}
+
+bool isComplexTrans( TransliterationFlags n )
+{
+ return bool(n & COMPLEX_TRANS_MASK);
+}
+
+TransliterationFlags maskSimpleTrans( TransliterationFlags n )
+{
+ return n & ~COMPLEX_TRANS_MASK;
+}
+
+bool isSimpleTrans( TransliterationFlags n )
+{
+ return bool(maskSimpleTrans(n));
+}
+
+// Regex patterns are case sensitive.
+TransliterationFlags maskSimpleRegexTrans( TransliterationFlags n )
+{
+ TransliterationFlags m = (n & TransliterationFlags::IGNORE_MASK) & ~TransliterationFlags::IGNORE_CASE;
+ TransliterationFlags v = n & TransliterationFlags::NON_IGNORE_MASK;
+ if (v == TransliterationFlags::UPPERCASE_LOWERCASE || v == TransliterationFlags::LOWERCASE_UPPERCASE)
+ v = TransliterationFlags::NONE;
+ return (m | v) & ~COMPLEX_TRANS_MASK;
+}
+
+bool isSimpleRegexTrans( TransliterationFlags n )
+{
+ return bool(maskSimpleRegexTrans(n));
+}
+};
+
+TextSearch::TextSearch(const Reference < XComponentContext > & rxContext)
+ : m_xContext( rxContext )
+{
+ SearchOptions2 aOpt;
+ aOpt.AlgorithmType2 = SearchAlgorithms2::ABSOLUTE;
+ aOpt.algorithmType = SearchAlgorithms_ABSOLUTE;
+ aOpt.searchFlag = SearchFlags::ALL_IGNORE_CASE;
+ //aOpt.Locale = ???;
+ setOptions( aOpt );
+}
+
+TextSearch::~TextSearch()
+{
+ pRegexMatcher.reset();
+ pWLD.reset();
+ pJumpTable.reset();
+ pJumpTable2.reset();
+}
+
+void TextSearch::setOptions2( const SearchOptions2& rOptions )
+{
+ std::unique_lock g(m_aMutex);
+
+ aSrchPara = rOptions;
+
+ pRegexMatcher.reset();
+ pWLD.reset();
+ pJumpTable.reset();
+ pJumpTable2.reset();
+ maWildcardReversePattern.clear();
+ maWildcardReversePattern2.clear();
+ TransliterationFlags transliterateFlags = static_cast<TransliterationFlags>(aSrchPara.transliterateFlags);
+ bSearchApostrophe = false;
+ bool bReplaceApostrophe = false;
+ if (aSrchPara.AlgorithmType2 == SearchAlgorithms2::REGEXP)
+ {
+ // RESrchPrepare will consider aSrchPara.transliterateFlags when
+ // picking the actual regex pattern
+ // (sSrchStr|sSrchStr2|SearchOptions2::searchString) and setting
+ // case-insensitivity. Create transliteration instance, if any, without
+ // ignore-case so later in TextSearch::searchForward() the string to
+ // match is not case-altered, leave case-(in)sensitive to regex engine.
+ transliterateFlags &= ~TransliterationFlags::IGNORE_CASE;
+ }
+ else if ( aSrchPara.searchString.indexOf('\'') > - 1 )
+ {
+ bSearchApostrophe = true;
+ bReplaceApostrophe = aSrchPara.searchString.indexOf(u'\u2019') > -1;
+ }
+
+ // Create Transliteration class
+ if( isSimpleTrans( transliterateFlags) )
+ {
+ if( !xTranslit.is() )
+ xTranslit.set( Transliteration::create( m_xContext ) );
+ xTranslit->loadModule(
+ static_cast<TransliterationModules>(maskSimpleTrans(transliterateFlags)),
+ aSrchPara.Locale);
+ }
+ else if( xTranslit.is() )
+ xTranslit = nullptr;
+
+ // Create Transliteration for 2<->1, 2<->2 transliteration
+ if ( isComplexTrans( transliterateFlags) )
+ {
+ if( !xTranslit2.is() )
+ xTranslit2.set( Transliteration::create( m_xContext ) );
+ // Load transliteration module
+ xTranslit2->loadModule(
+ static_cast<TransliterationModules>(maskComplexTrans(transliterateFlags)),
+ aSrchPara.Locale);
+ }
+
+ if ( !xBreak.is() )
+ xBreak = css::i18n::BreakIterator::create( m_xContext );
+
+ sSrchStr = aSrchPara.searchString;
+
+ // Transliterate search string.
+ if (aSrchPara.AlgorithmType2 == SearchAlgorithms2::REGEXP)
+ {
+ if (isSimpleRegexTrans(transliterateFlags))
+ {
+ if (maskSimpleRegexTrans(transliterateFlags) !=
+ maskSimpleTrans(transliterateFlags))
+ {
+ css::uno::Reference< XExtendedTransliteration > xTranslitPattern(
+ Transliteration::create( m_xContext ));
+ if (xTranslitPattern.is())
+ {
+ xTranslitPattern->loadModule(
+ static_cast<TransliterationModules>(maskSimpleRegexTrans(transliterateFlags)),
+ aSrchPara.Locale);
+ sSrchStr = xTranslitPattern->transliterateString2String(
+ aSrchPara.searchString, 0, aSrchPara.searchString.getLength());
+ }
+ }
+ else
+ {
+ if (xTranslit.is())
+ sSrchStr = xTranslit->transliterateString2String(
+ aSrchPara.searchString, 0, aSrchPara.searchString.getLength());
+ }
+ // xTranslit2 complex transliterated sSrchStr2 is not used in
+ // regex, see TextSearch::searchForward() and
+ // TextSearch::searchBackward()
+ }
+ }
+ else
+ {
+ if ( xTranslit.is() && isSimpleTrans(transliterateFlags) )
+ sSrchStr = xTranslit->transliterateString2String(
+ aSrchPara.searchString, 0, aSrchPara.searchString.getLength());
+
+ if ( xTranslit2.is() && isComplexTrans(transliterateFlags) )
+ sSrchStr2 = xTranslit2->transliterateString2String(
+ aSrchPara.searchString, 0, aSrchPara.searchString.getLength());
+ }
+
+ if ( bReplaceApostrophe )
+ sSrchStr = sSrchStr.replace(u'\u2019', '\'');
+
+ // Take the new SearchOptions2::AlgorithmType2 field and ignore
+ // SearchOptions::algorithmType
+ switch( aSrchPara.AlgorithmType2)
+ {
+ case SearchAlgorithms2::REGEXP:
+ fnForward = &TextSearch::RESrchFrwrd;
+ fnBackward = &TextSearch::RESrchBkwrd;
+ RESrchPrepare( aSrchPara);
+ break;
+
+ case SearchAlgorithms2::APPROXIMATE:
+ fnForward = &TextSearch::ApproxSrchFrwrd;
+ fnBackward = &TextSearch::ApproxSrchBkwrd;
+
+ pWLD.reset( new WLevDistance( sSrchStr.getStr(), aSrchPara.changedChars,
+ aSrchPara.insertedChars, aSrchPara.deletedChars,
+ 0 != (SearchFlags::LEV_RELAXED & aSrchPara.searchFlag ) ) );
+
+ nLimit = pWLD->GetLimit();
+ break;
+
+ case SearchAlgorithms2::WILDCARD:
+ mcWildcardEscapeChar = static_cast<sal_uInt32>(aSrchPara.WildcardEscapeCharacter);
+ mbWildcardAllowSubstring = ((aSrchPara.searchFlag & SearchFlags::WILD_MATCH_SELECTION) == 0);
+ fnForward = &TextSearch::WildcardSrchFrwrd;
+ fnBackward = &TextSearch::WildcardSrchBkwrd;
+ break;
+
+ default:
+ SAL_WARN("i18npool","TextSearch::setOptions2 - default what?");
+ [[fallthrough]];
+ case SearchAlgorithms2::ABSOLUTE:
+ fnForward = &TextSearch::NSrchFrwrd;
+ fnBackward = &TextSearch::NSrchBkwrd;
+ break;
+ }
+}
+
+void TextSearch::setOptions( const SearchOptions& rOptions )
+{
+ sal_Int16 nAlgorithmType2;
+ switch (rOptions.algorithmType)
+ {
+ case SearchAlgorithms_REGEXP:
+ nAlgorithmType2 = SearchAlgorithms2::REGEXP;
+ break;
+ case SearchAlgorithms_APPROXIMATE:
+ nAlgorithmType2 = SearchAlgorithms2::APPROXIMATE;
+ break;
+ default:
+ SAL_WARN("i18npool","TextSearch::setOptions - default what?");
+ [[fallthrough]];
+ case SearchAlgorithms_ABSOLUTE:
+ nAlgorithmType2 = SearchAlgorithms2::ABSOLUTE;
+ break;
+ }
+ // It would be nice if an inherited struct had a ctor that takes an
+ // instance of the object the struct derived from...
+ SearchOptions2 aOptions2(
+ rOptions.algorithmType,
+ rOptions.searchFlag,
+ rOptions.searchString,
+ rOptions.replaceString,
+ rOptions.Locale,
+ rOptions.changedChars,
+ rOptions.deletedChars,
+ rOptions.insertedChars,
+ rOptions.transliterateFlags,
+ nAlgorithmType2,
+ 0 // no wildcard search, no escape character...
+ );
+ setOptions2( aOptions2);
+}
+
+static sal_Int32 FindPosInSeq_Impl( const Sequence <sal_Int32>& rOff, sal_Int32 nPos )
+{
+ auto pOff = std::find_if(rOff.begin(), rOff.end(),
+ [nPos](const sal_Int32 nOff) { return nOff >= nPos; });
+ return static_cast<sal_Int32>(std::distance(rOff.begin(), pOff));
+}
+
+SearchResult TextSearch::searchForward( const OUString& searchStr, sal_Int32 startPos, sal_Int32 endPos )
+{
+ std::unique_lock g(m_aMutex);
+
+ SearchResult sres;
+
+ OUString in_str(searchStr);
+
+ // in non-regex mode, allow searching typographical apostrophe with the ASCII one
+ // to avoid regression after using automatic conversion to U+2019 during typing in Writer
+ bool bReplaceApostrophe = bSearchApostrophe && in_str.indexOf(u'\u2019') > -1;
+
+ bUsePrimarySrchStr = true;
+
+ if ( xTranslit.is() )
+ {
+ // apply normal transliteration (1<->1, 1<->0)
+
+ sal_Int32 nInStartPos = startPos;
+ if (pRegexMatcher && startPos > 0)
+ {
+ // tdf#89665, tdf#75806: An optimization to avoid transliterating the whole string, yet
+ // transliterate enough of the leading text to allow sensible look-behind assertions.
+ // 100 is chosen arbitrarily in the hope that look-behind assertions would largely fit.
+ // See http://userguide.icu-project.org/strings/regexp for look-behind assertion syntax.
+ // When search regex doesn't start with an assertion, 3 is to allow startPos to be in
+ // the middle of a surrogate pair, preceded by another surrogate pair.
+ const sal_Int32 nMaxLeadingLen = aSrchPara.searchString.startsWith("(?") ? 100 : 3;
+ nInStartPos -= std::min(nMaxLeadingLen, startPos);
+ }
+ sal_Int32 nInEndPos = endPos;
+ if (pRegexMatcher && endPos < searchStr.getLength())
+ {
+ // tdf#65038: ditto for look-ahead assertions
+ const sal_Int32 nMaxTrailingLen = aSrchPara.searchString.endsWith(")") ? 100 : 3;
+ nInEndPos += std::min(nMaxTrailingLen, searchStr.getLength() - endPos);
+ }
+
+ css::uno::Sequence<sal_Int32> offset(nInEndPos - nInStartPos);
+ in_str = xTranslit->transliterate(searchStr, nInStartPos, nInEndPos - nInStartPos, offset);
+
+ if ( bReplaceApostrophe )
+ in_str = in_str.replace(u'\u2019', '\'');
+
+ // JP 20.6.2001: also the start and end positions must be corrected!
+ sal_Int32 newStartPos =
+ (startPos == 0) ? 0 : FindPosInSeq_Impl( offset, startPos );
+
+ sal_Int32 newEndPos = (endPos < searchStr.getLength())
+ ? FindPosInSeq_Impl( offset, endPos )
+ : in_str.getLength();
+
+ sres = (this->*fnForward)( in_str, newStartPos, newEndPos );
+
+ // Map offsets back to untransliterated string.
+ const sal_Int32 nOffsets = offset.getLength();
+ if (nOffsets)
+ {
+ auto sres_startOffsetRange = asNonConstRange(sres.startOffset);
+ auto sres_endOffsetRange = asNonConstRange(sres.endOffset);
+ // For regex nGroups is the number of groups+1 with group 0 being
+ // the entire match.
+ const sal_Int32 nGroups = sres.startOffset.getLength();
+ for ( sal_Int32 k = 0; k < nGroups; k++ )
+ {
+ const sal_Int32 nStart = sres.startOffset[k];
+ // Result offsets are negative (-1) if a group expression was
+ // not matched.
+ if (nStart >= 0)
+ sres_startOffsetRange[k] = (nStart < nOffsets ? offset[nStart] : (offset[nOffsets - 1] + 1));
+ // JP 20.6.2001: end is ever exclusive and then don't return
+ // the position of the next character - return the
+ // next position behind the last found character!
+ // "a b c" find "b" must return 2,3 and not 2,4!!!
+ const sal_Int32 nStop = sres.endOffset[k];
+ if (nStop >= 0)
+ {
+ if (nStop > 0)
+ sres_endOffsetRange[k] = offset[(nStop <= nOffsets ? nStop : nOffsets) - 1] + 1;
+ else
+ sres_endOffsetRange[k] = offset[0];
+ }
+ }
+ }
+ }
+ else
+ {
+ if ( bReplaceApostrophe )
+ in_str = in_str.replace(u'\u2019', '\'');
+
+ sres = (this->*fnForward)( in_str, startPos, endPos );
+ }
+
+ if ( xTranslit2.is() && aSrchPara.AlgorithmType2 != SearchAlgorithms2::REGEXP)
+ {
+ SearchResult sres2;
+
+ in_str = searchStr;
+ css::uno::Sequence <sal_Int32> offset( in_str.getLength());
+
+ in_str = xTranslit2->transliterate( searchStr, 0, in_str.getLength(), offset );
+
+ if( startPos )
+ startPos = FindPosInSeq_Impl( offset, startPos );
+
+ if( endPos < searchStr.getLength() )
+ endPos = FindPosInSeq_Impl( offset, endPos );
+ else
+ endPos = in_str.getLength();
+
+ bUsePrimarySrchStr = false;
+ sres2 = (this->*fnForward)( in_str, startPos, endPos );
+ auto sres2_startOffsetRange = asNonConstRange(sres2.startOffset);
+ auto sres2_endOffsetRange = asNonConstRange(sres2.endOffset);
+
+ for ( int k = 0; k < sres2.startOffset.getLength(); k++ )
+ {
+ if (sres2.startOffset[k])
+ sres2_startOffsetRange[k] = offset[sres2.startOffset[k]-1] + 1;
+ if (sres2.endOffset[k])
+ sres2_endOffsetRange[k] = offset[sres2.endOffset[k]-1] + 1;
+ }
+
+ // pick first and long one
+ if ( sres.subRegExpressions == 0)
+ return sres2;
+ if ( sres2.subRegExpressions == 1)
+ {
+ if ( sres.startOffset[0] > sres2.startOffset[0])
+ return sres2;
+ else if ( sres.startOffset[0] == sres2.startOffset[0] &&
+ sres.endOffset[0] < sres2.endOffset[0])
+ return sres2;
+ }
+ }
+
+ return sres;
+}
+
+SearchResult TextSearch::searchBackward( const OUString& searchStr, sal_Int32 startPos, sal_Int32 endPos )
+{
+ std::unique_lock g(m_aMutex);
+
+ SearchResult sres;
+
+ OUString in_str(searchStr);
+
+ // in non-regex mode, allow searching typographical apostrophe with the ASCII one
+ // to avoid regression after using automatic conversion to U+2019 during typing in Writer
+ bool bReplaceApostrophe = bSearchApostrophe && in_str.indexOf(u'\u2019') > -1;
+
+ bUsePrimarySrchStr = true;
+
+ if ( xTranslit.is() )
+ {
+ // apply only simple 1<->1 transliteration here
+ css::uno::Sequence<sal_Int32> offset(startPos - endPos);
+ in_str = xTranslit->transliterate( searchStr, endPos, startPos - endPos, offset );
+
+ if ( bReplaceApostrophe )
+ in_str = in_str.replace(u'\u2019', '\'');
+
+ // JP 20.6.2001: also the start and end positions must be corrected!
+ sal_Int32 const newStartPos = (startPos < searchStr.getLength())
+ ? FindPosInSeq_Impl( offset, startPos )
+ : in_str.getLength();
+
+ sal_Int32 const newEndPos =
+ (endPos == 0) ? 0 : FindPosInSeq_Impl( offset, endPos );
+
+ // TODO: this would need nExtraOffset handling to avoid $ matching
+ // if (pRegexMatcher && startPos < searchStr.getLength())
+ // but that appears to be impossible with ICU regex
+
+ sres = (this->*fnBackward)( in_str, newStartPos, newEndPos );
+
+ // Map offsets back to untransliterated string.
+ const sal_Int32 nOffsets = offset.getLength();
+ if (nOffsets)
+ {
+ auto sres_startOffsetRange = asNonConstRange(sres.startOffset);
+ auto sres_endOffsetRange = asNonConstRange(sres.endOffset);
+ // For regex nGroups is the number of groups+1 with group 0 being
+ // the entire match.
+ const sal_Int32 nGroups = sres.startOffset.getLength();
+ for ( sal_Int32 k = 0; k < nGroups; k++ )
+ {
+ const sal_Int32 nStart = sres.startOffset[k];
+ // Result offsets are negative (-1) if a group expression was
+ // not matched.
+ if (nStart >= 0)
+ {
+ if (nStart > 0)
+ sres_startOffsetRange[k] = offset[(nStart <= nOffsets ? nStart : nOffsets) - 1] + 1;
+ else
+ sres_startOffsetRange[k] = offset[0];
+ }
+ // JP 20.6.2001: end is ever exclusive and then don't return
+ // the position of the next character - return the
+ // next position behind the last found character!
+ // "a b c" find "b" must return 2,3 and not 2,4!!!
+ const sal_Int32 nStop = sres.endOffset[k];
+ if (nStop >= 0)
+ sres_endOffsetRange[k] = (nStop < nOffsets ? offset[nStop] : (offset[nOffsets - 1] + 1));
+ }
+ }
+ }
+ else
+ {
+ if ( bReplaceApostrophe )
+ in_str = in_str.replace(u'\u2019', '\'');
+
+ sres = (this->*fnBackward)( in_str, startPos, endPos );
+ }
+
+ if ( xTranslit2.is() && aSrchPara.AlgorithmType2 != SearchAlgorithms2::REGEXP )
+ {
+ SearchResult sres2;
+
+ in_str = searchStr;
+ css::uno::Sequence <sal_Int32> offset( in_str.getLength());
+
+ in_str = xTranslit2->transliterate(searchStr, 0, in_str.getLength(), offset);
+
+ if( startPos < searchStr.getLength() )
+ startPos = FindPosInSeq_Impl( offset, startPos );
+ else
+ startPos = in_str.getLength();
+
+ if( endPos )
+ endPos = FindPosInSeq_Impl( offset, endPos );
+
+ bUsePrimarySrchStr = false;
+ sres2 = (this->*fnBackward)( in_str, startPos, endPos );
+ auto sres2_startOffsetRange = asNonConstRange(sres2.startOffset);
+ auto sres2_endOffsetRange = asNonConstRange(sres2.endOffset);
+
+ for( int k = 0; k < sres2.startOffset.getLength(); k++ )
+ {
+ if (sres2.startOffset[k])
+ sres2_startOffsetRange[k] = offset[sres2.startOffset[k]-1]+1;
+ if (sres2.endOffset[k])
+ sres2_endOffsetRange[k] = offset[sres2.endOffset[k]-1]+1;
+ }
+
+ // pick last and long one
+ if ( sres.subRegExpressions == 0 )
+ return sres2;
+ if ( sres2.subRegExpressions == 1 )
+ {
+ if ( sres.startOffset[0] < sres2.startOffset[0] )
+ return sres2;
+ if ( sres.startOffset[0] == sres2.startOffset[0] &&
+ sres.endOffset[0] > sres2.endOffset[0] )
+ return sres2;
+ }
+ }
+
+ return sres;
+}
+
+
+bool TextSearch::IsDelimiter( const OUString& rStr, sal_Int32 nPos ) const
+{
+ bool bRet = true;
+ if( '\x7f' != rStr[nPos])
+ {
+ if ( !xCharClass.is() )
+ xCharClass = CharacterClassification::create( m_xContext );
+ sal_Int32 nCType = xCharClass->getCharacterType( rStr, nPos,
+ aSrchPara.Locale );
+ if( 0 != (( KCharacterType::DIGIT | KCharacterType::ALPHA |
+ KCharacterType::LETTER ) & nCType ) )
+ bRet = false;
+ }
+ return bRet;
+}
+
+// --------- helper methods for Boyer-Moore like text searching ----------
+// TODO: use ICU's regex UREGEX_LITERAL mode instead when it becomes available
+
+void TextSearch::MakeForwardTab()
+{
+ // create the jumptable for the search text
+
+ if( pJumpTable && bIsForwardTab )
+ {
+ return; // the jumpTable is ok
+ }
+ bIsForwardTab = true;
+
+ sal_Int32 n, nLen = sSrchStr.getLength();
+ pJumpTable.reset( new TextSearchJumpTable );
+
+ for( n = 0; n < nLen - 1; ++n )
+ {
+ sal_Unicode cCh = sSrchStr[n];
+ sal_Int32 nDiff = nLen - n - 1;
+ TextSearchJumpTable::value_type aEntry( cCh, nDiff );
+
+ ::std::pair< TextSearchJumpTable::iterator, bool > aPair =
+ pJumpTable->insert( aEntry );
+ if ( !aPair.second )
+ (*(aPair.first)).second = nDiff;
+ }
+}
+
+void TextSearch::MakeForwardTab2()
+{
+ // create the jumptable for the search text
+ if( pJumpTable2 && bIsForwardTab )
+ {
+ return; // the jumpTable is ok
+ }
+ bIsForwardTab = true;
+
+ sal_Int32 n, nLen = sSrchStr2.getLength();
+ pJumpTable2.reset( new TextSearchJumpTable );
+
+ for( n = 0; n < nLen - 1; ++n )
+ {
+ sal_Unicode cCh = sSrchStr2[n];
+ sal_Int32 nDiff = nLen - n - 1;
+
+ TextSearchJumpTable::value_type aEntry( cCh, nDiff );
+ ::std::pair< TextSearchJumpTable::iterator, bool > aPair =
+ pJumpTable2->insert( aEntry );
+ if ( !aPair.second )
+ (*(aPair.first)).second = nDiff;
+ }
+}
+
+void TextSearch::MakeBackwardTab()
+{
+ // create the jumptable for the search text
+ if( pJumpTable && !bIsForwardTab)
+ {
+ return; // the jumpTable is ok
+ }
+ bIsForwardTab = false;
+
+ sal_Int32 n, nLen = sSrchStr.getLength();
+ pJumpTable.reset( new TextSearchJumpTable );
+
+ for( n = nLen-1; n > 0; --n )
+ {
+ sal_Unicode cCh = sSrchStr[n];
+ TextSearchJumpTable::value_type aEntry( cCh, n );
+ ::std::pair< TextSearchJumpTable::iterator, bool > aPair =
+ pJumpTable->insert( aEntry );
+ if ( !aPair.second )
+ (*(aPair.first)).second = n;
+ }
+}
+
+void TextSearch::MakeBackwardTab2()
+{
+ // create the jumptable for the search text
+ if( pJumpTable2 && !bIsForwardTab )
+ {
+ return; // the jumpTable is ok
+ }
+ bIsForwardTab = false;
+
+ sal_Int32 n, nLen = sSrchStr2.getLength();
+ pJumpTable2.reset( new TextSearchJumpTable );
+
+ for( n = nLen-1; n > 0; --n )
+ {
+ sal_Unicode cCh = sSrchStr2[n];
+ TextSearchJumpTable::value_type aEntry( cCh, n );
+ ::std::pair< TextSearchJumpTable::iterator, bool > aPair =
+ pJumpTable2->insert( aEntry );
+ if ( !aPair.second )
+ (*(aPair.first)).second = n;
+ }
+}
+
+sal_Int32 TextSearch::GetDiff( const sal_Unicode cChr ) const
+{
+ TextSearchJumpTable *pJump;
+ OUString sSearchKey;
+
+ if ( bUsePrimarySrchStr ) {
+ pJump = pJumpTable.get();
+ sSearchKey = sSrchStr;
+ } else {
+ pJump = pJumpTable2.get();
+ sSearchKey = sSrchStr2;
+ }
+
+ TextSearchJumpTable::const_iterator iLook = pJump->find( cChr );
+ if ( iLook == pJump->end() )
+ return sSearchKey.getLength();
+ return (*iLook).second;
+}
+
+
+SearchResult TextSearch::NSrchFrwrd( const OUString& searchStr, sal_Int32 startPos, sal_Int32 endPos )
+{
+ SearchResult aRet;
+ aRet.subRegExpressions = 0;
+
+ OUString sSearchKey = bUsePrimarySrchStr ? sSrchStr : sSrchStr2;
+
+ sal_Int32 nSuchIdx = searchStr.getLength();
+ sal_Int32 nEnd = endPos;
+ if( !nSuchIdx || !sSearchKey.getLength() || sSearchKey.getLength() > nSuchIdx )
+ return aRet;
+
+
+ if( nEnd < sSearchKey.getLength() ) // position inside the search region ?
+ return aRet;
+
+ nEnd -= sSearchKey.getLength();
+
+ if (bUsePrimarySrchStr)
+ MakeForwardTab(); // create the jumptable
+ else
+ MakeForwardTab2();
+
+ for (sal_Int32 nCmpIdx = startPos; // start position for the search
+ nCmpIdx <= nEnd;
+ nCmpIdx += GetDiff( searchStr[nCmpIdx + sSearchKey.getLength()-1]))
+ {
+ nSuchIdx = sSearchKey.getLength() - 1;
+ while( nSuchIdx >= 0 && sSearchKey[nSuchIdx] == searchStr[nCmpIdx + nSuchIdx])
+ {
+ if( nSuchIdx == 0 )
+ {
+ if( SearchFlags::NORM_WORD_ONLY & aSrchPara.searchFlag )
+ {
+ sal_Int32 nFndEnd = nCmpIdx + sSearchKey.getLength();
+ bool bAtStart = !nCmpIdx;
+ bool bAtEnd = nFndEnd == endPos;
+ bool bDelimBefore = bAtStart || IsDelimiter( searchStr, nCmpIdx-1 );
+ bool bDelimBehind = bAtEnd || IsDelimiter( searchStr, nFndEnd );
+ // * 1 -> only one word in the paragraph
+ // * 2 -> at begin of paragraph
+ // * 3 -> at end of paragraph
+ // * 4 -> inside the paragraph
+ if( !( ( bAtStart && bAtEnd ) || // 1
+ ( bAtStart && bDelimBehind ) || // 2
+ ( bAtEnd && bDelimBefore ) || // 3
+ ( bDelimBefore && bDelimBehind ))) // 4
+ break;
+ }
+
+ aRet.subRegExpressions = 1;
+ aRet.startOffset = { nCmpIdx };
+ aRet.endOffset = { nCmpIdx + sSearchKey.getLength() };
+
+ return aRet;
+ }
+ else
+ nSuchIdx--;
+ }
+ }
+ return aRet;
+}
+
+SearchResult TextSearch::NSrchBkwrd( const OUString& searchStr, sal_Int32 startPos, sal_Int32 endPos )
+{
+ SearchResult aRet;
+ aRet.subRegExpressions = 0;
+
+ OUString sSearchKey = bUsePrimarySrchStr ? sSrchStr : sSrchStr2;
+
+ sal_Int32 nSuchIdx = searchStr.getLength();
+ sal_Int32 nEnd = endPos;
+ if( nSuchIdx == 0 || sSearchKey.isEmpty() || sSearchKey.getLength() > nSuchIdx)
+ return aRet;
+
+ if (bUsePrimarySrchStr)
+ MakeBackwardTab(); // create the jumptable
+ else
+ MakeBackwardTab2();
+
+ if( nEnd == nSuchIdx ) // end position for the search
+ nEnd = sSearchKey.getLength();
+ else
+ nEnd += sSearchKey.getLength();
+
+ sal_Int32 nCmpIdx = startPos; // start position for the search
+
+ while (nCmpIdx >= nEnd)
+ {
+ nSuchIdx = 0;
+ while( nSuchIdx < sSearchKey.getLength() && sSearchKey[nSuchIdx] ==
+ searchStr[nCmpIdx + nSuchIdx - sSearchKey.getLength()] )
+ nSuchIdx++;
+ if( nSuchIdx >= sSearchKey.getLength() )
+ {
+ if( SearchFlags::NORM_WORD_ONLY & aSrchPara.searchFlag )
+ {
+ sal_Int32 nFndStt = nCmpIdx - sSearchKey.getLength();
+ bool bAtStart = !nFndStt;
+ bool bAtEnd = nCmpIdx == startPos;
+ bool bDelimBehind = bAtEnd || IsDelimiter( searchStr, nCmpIdx );
+ bool bDelimBefore = bAtStart || // begin of paragraph
+ IsDelimiter( searchStr, nFndStt-1 );
+ // * 1 -> only one word in the paragraph
+ // * 2 -> at begin of paragraph
+ // * 3 -> at end of paragraph
+ // * 4 -> inside the paragraph
+ if( ( bAtStart && bAtEnd ) || // 1
+ ( bAtStart && bDelimBehind ) || // 2
+ ( bAtEnd && bDelimBefore ) || // 3
+ ( bDelimBefore && bDelimBehind )) // 4
+ {
+ aRet.subRegExpressions = 1;
+ aRet.startOffset = { nCmpIdx };
+ aRet.endOffset = { nCmpIdx - sSearchKey.getLength() };
+ return aRet;
+ }
+ }
+ else
+ {
+ aRet.subRegExpressions = 1;
+ aRet.startOffset = { nCmpIdx };
+ aRet.endOffset = { nCmpIdx - sSearchKey.getLength() };
+ return aRet;
+ }
+ }
+ nSuchIdx = GetDiff( searchStr[nCmpIdx - sSearchKey.getLength()] );
+ if( nCmpIdx < nSuchIdx )
+ return aRet;
+ nCmpIdx -= nSuchIdx;
+ }
+ return aRet;
+}
+
+void TextSearch::RESrchPrepare( const css::util::SearchOptions2& rOptions)
+{
+ TransliterationFlags transliterateFlags = static_cast<TransliterationFlags>(rOptions.transliterateFlags);
+ // select the transliterated pattern string
+ const OUString& rPatternStr =
+ (isSimpleTrans(transliterateFlags) ? sSrchStr
+ : (isComplexTrans(transliterateFlags) ? sSrchStr2 : rOptions.searchString));
+
+ sal_uInt32 nIcuSearchFlags = UREGEX_UWORD; // request UAX#29 unicode capability
+ // map css::util::SearchFlags to ICU uregex.h flags
+ // TODO: REG_EXTENDED, REG_NOT_BEGINOFLINE, REG_NOT_ENDOFLINE
+ // REG_NEWLINE is neither properly defined nor used anywhere => not implemented
+ // REG_NOSUB is not used anywhere => not implemented
+ // NORM_WORD_ONLY is only used for SearchAlgorithm==Absolute
+ // LEV_RELAXED is only used for SearchAlgorithm==Approximate
+ // Note that the search flag ALL_IGNORE_CASE is deprecated in UNO
+ // probably because the transliteration flag IGNORE_CASE handles it as well.
+ if( (rOptions.searchFlag & css::util::SearchFlags::ALL_IGNORE_CASE) != 0
+ || (transliterateFlags & TransliterationFlags::IGNORE_CASE))
+ nIcuSearchFlags |= UREGEX_CASE_INSENSITIVE;
+ UErrorCode nIcuErr = U_ZERO_ERROR;
+ // assumption: transliteration didn't mangle regexp control chars
+ icu::UnicodeString aIcuSearchPatStr( reinterpret_cast<const UChar*>(rPatternStr.getStr()), rPatternStr.getLength());
+#ifndef DISABLE_WORDBOUND_EMULATION
+ // for convenience specific syntax elements of the old regex engine are emulated
+ // - by replacing \< with "word-break followed by a look-ahead word-char"
+ static const icu::UnicodeString aChevronPatternB( "\\\\<", -1, icu::UnicodeString::kInvariant);
+ static const icu::UnicodeString aChevronReplaceB( "\\\\b(?=\\\\w)", -1, icu::UnicodeString::kInvariant);
+ static icu::RegexMatcher aChevronMatcherB( aChevronPatternB, 0, nIcuErr);
+ aChevronMatcherB.reset( aIcuSearchPatStr);
+ aIcuSearchPatStr = aChevronMatcherB.replaceAll( aChevronReplaceB, nIcuErr);
+ aChevronMatcherB.reset();
+ // - by replacing \> with "look-behind word-char followed by a word-break"
+ static const icu::UnicodeString aChevronPatternE( "\\\\>", -1, icu::UnicodeString::kInvariant);
+ static const icu::UnicodeString aChevronReplaceE( "(?<=\\\\w)\\\\b", -1, icu::UnicodeString::kInvariant);
+ static icu::RegexMatcher aChevronMatcherE( aChevronPatternE, 0, nIcuErr);
+ aChevronMatcherE.reset( aIcuSearchPatStr);
+ aIcuSearchPatStr = aChevronMatcherE.replaceAll( aChevronReplaceE, nIcuErr);
+ aChevronMatcherE.reset();
+#endif
+ pRegexMatcher.reset( new icu::RegexMatcher( aIcuSearchPatStr, nIcuSearchFlags, nIcuErr) );
+ if (nIcuErr)
+ {
+ SAL_INFO( "i18npool", "TextSearch::RESrchPrepare UErrorCode " << nIcuErr);
+ pRegexMatcher.reset();
+ }
+ else
+ {
+ // Pathological patterns may result in exponential run time making the
+ // application appear to be frozen. Limit that. Documentation for this
+ // call says
+ // https://unicode-org.github.io/icu-docs/apidoc/released/icu4c/classicu_1_1RegexMatcher.html#a6ebcfcab4fe6a38678c0291643a03a00
+ // "The units of the limit are steps of the match engine.
+ // Correspondence with actual processor time will depend on the speed
+ // of the processor and the details of the specific pattern, but will
+ // typically be on the order of milliseconds."
+ // Just what is a good value? 42 is always an answer ... the 23 enigma
+ // as well... which on the dev's machine is roughly 50 seconds with the
+ // pattern of fdo#70627.
+ /* TODO: make this a configuration settable value and possibly take
+ * complexity of expression into account and maybe even length of text
+ * to be matched; currently (2013-11-25) that is at most one 64k
+ * paragraph per RESrchFrwrd()/RESrchBkwrd() call. */
+ pRegexMatcher->setTimeLimit( 23*1000, nIcuErr);
+ }
+}
+
+
+static bool lcl_findRegex(std::unique_ptr<icu::RegexMatcher> const& pRegexMatcher,
+ sal_Int32 nStartPos, sal_Int32 nEndPos, UErrorCode& rIcuErr)
+{
+ pRegexMatcher->region(nStartPos, nEndPos, rIcuErr);
+ pRegexMatcher->useAnchoringBounds(false); // use whole text's anchoring bounds, not region's
+ pRegexMatcher->useTransparentBounds(true); // take text outside of the region into account for
+ // look-ahead/behind assertions
+
+ if (!pRegexMatcher->find(rIcuErr))
+ {
+ /* TODO: future versions could pass the UErrorCode or translations
+ * thereof to the caller, for example to inform the user of
+ * U_REGEX_TIME_OUT. The strange thing though is that an error is set
+ * only after the second call that returns immediately and not if
+ * timeout occurred on the first call?!? */
+ SAL_INFO( "i18npool", "lcl_findRegex UErrorCode " << rIcuErr);
+ return false;
+ }
+ return true;
+}
+
+SearchResult TextSearch::RESrchFrwrd( const OUString& searchStr,
+ sal_Int32 startPos, sal_Int32 endPos )
+{
+ SearchResult aRet;
+ aRet.subRegExpressions = 0;
+ if( !pRegexMatcher)
+ return aRet;
+
+ if( endPos > searchStr.getLength())
+ endPos = searchStr.getLength();
+
+ // use the ICU RegexMatcher to find the matches
+ UErrorCode nIcuErr = U_ZERO_ERROR;
+ const icu::UnicodeString aSearchTargetStr(false, reinterpret_cast<const UChar*>(searchStr.getStr()),
+ searchStr.getLength());
+ pRegexMatcher->reset( aSearchTargetStr);
+ // search until there is a valid match
+ for(;;)
+ {
+ if (!lcl_findRegex( pRegexMatcher, startPos, endPos, nIcuErr))
+ return aRet;
+
+ // #i118887# ignore zero-length matches e.g. "a*" in "bc"
+ int nStartOfs = pRegexMatcher->start( nIcuErr);
+ int nEndOfs = pRegexMatcher->end( nIcuErr);
+ if( nStartOfs < nEndOfs)
+ break;
+ // If the zero-length match is behind the string, do not match it again
+ // and again until startPos reaches there. A match behind the string is
+ // a "$" anchor.
+ if (nStartOfs == endPos)
+ break;
+ // try at next position if there was a zero-length match
+ if( ++startPos >= endPos)
+ return aRet;
+ }
+
+ // extract the result of the search
+ const int nGroupCount = pRegexMatcher->groupCount();
+ aRet.subRegExpressions = nGroupCount + 1;
+ aRet.startOffset.realloc( aRet.subRegExpressions);
+ auto pstartOffset = aRet.startOffset.getArray();
+ aRet.endOffset.realloc( aRet.subRegExpressions);
+ auto pendOffset = aRet.endOffset.getArray();
+ pstartOffset[0] = pRegexMatcher->start( nIcuErr);
+ pendOffset[0] = pRegexMatcher->end( nIcuErr);
+ for( int i = 1; i <= nGroupCount; ++i) {
+ pstartOffset[i] = pRegexMatcher->start( i, nIcuErr);
+ pendOffset[i] = pRegexMatcher->end( i, nIcuErr);
+ }
+
+ return aRet;
+}
+
+SearchResult TextSearch::RESrchBkwrd( const OUString& searchStr,
+ sal_Int32 startPos, sal_Int32 endPos )
+{
+ // NOTE: for backwards search callers provide startPos/endPos inverted!
+ SearchResult aRet;
+ aRet.subRegExpressions = 0;
+ if( !pRegexMatcher)
+ return aRet;
+
+ if( startPos > searchStr.getLength())
+ startPos = searchStr.getLength();
+
+ // use the ICU RegexMatcher to find the matches
+ // TODO: use ICU's backward searching once it becomes available
+ // as its replacement using forward search is not as good as the real thing
+ UErrorCode nIcuErr = U_ZERO_ERROR;
+ const icu::UnicodeString aSearchTargetStr(false, reinterpret_cast<const UChar*>(searchStr.getStr()),
+ searchStr.getLength());
+ pRegexMatcher->reset( aSearchTargetStr);
+ if (!lcl_findRegex( pRegexMatcher, endPos, startPos, nIcuErr))
+ return aRet;
+
+ // find the last match
+ int nLastPos = 0;
+ int nFoundEnd = 0;
+ int nGoodPos = 0, nGoodEnd = 0;
+ bool bFirst = true;
+ do {
+ nLastPos = pRegexMatcher->start( nIcuErr);
+ nFoundEnd = pRegexMatcher->end( nIcuErr);
+ if (nLastPos < nFoundEnd)
+ {
+ // remember last non-zero-length match
+ nGoodPos = nLastPos;
+ nGoodEnd = nFoundEnd;
+ }
+ if( nFoundEnd >= startPos)
+ break;
+ bFirst = false;
+ if( nFoundEnd == nLastPos)
+ ++nFoundEnd;
+ } while( lcl_findRegex( pRegexMatcher, nFoundEnd, startPos, nIcuErr));
+
+ // Ignore all zero-length matches except "$" anchor on first match.
+ if (nGoodPos == nGoodEnd)
+ {
+ if (bFirst && nLastPos == startPos)
+ nGoodPos = nLastPos;
+ else
+ return aRet;
+ }
+
+ // find last match again to get its details
+ lcl_findRegex( pRegexMatcher, nGoodPos, startPos, nIcuErr);
+
+ // fill in the details of the last match
+ const int nGroupCount = pRegexMatcher->groupCount();
+ aRet.subRegExpressions = nGroupCount + 1;
+ aRet.startOffset.realloc( aRet.subRegExpressions);
+ auto pstartOffset = aRet.startOffset.getArray();
+ aRet.endOffset.realloc( aRet.subRegExpressions);
+ auto pendOffset = aRet.endOffset.getArray();
+ // NOTE: existing users of backward search seem to expect startOfs/endOfs being inverted!
+ pstartOffset[0] = pRegexMatcher->end( nIcuErr);
+ pendOffset[0] = pRegexMatcher->start( nIcuErr);
+ for( int i = 1; i <= nGroupCount; ++i) {
+ pstartOffset[i] = pRegexMatcher->end( i, nIcuErr);
+ pendOffset[i] = pRegexMatcher->start( i, nIcuErr);
+ }
+
+ return aRet;
+}
+
+
+// search for words phonetically
+SearchResult TextSearch::ApproxSrchFrwrd( const OUString& searchStr,
+ sal_Int32 startPos, sal_Int32 endPos )
+{
+ SearchResult aRet;
+ aRet.subRegExpressions = 0;
+
+ if( !xBreak.is() )
+ return aRet;
+
+ sal_Int32 nStt, nEnd;
+
+ Boundary aWBnd = xBreak->getWordBoundary( searchStr, startPos,
+ aSrchPara.Locale,
+ WordType::ANYWORD_IGNOREWHITESPACES, true );
+
+ do
+ {
+ if( aWBnd.startPos >= endPos )
+ break;
+ nStt = aWBnd.startPos < startPos ? startPos : aWBnd.startPos;
+ nEnd = std::min(aWBnd.endPos, endPos);
+
+ if( nStt < nEnd &&
+ pWLD->WLD( searchStr.getStr() + nStt, nEnd - nStt ) <= nLimit )
+ {
+ aRet.subRegExpressions = 1;
+ aRet.startOffset = { nStt };
+ aRet.endOffset = { nEnd };
+ break;
+ }
+
+ nStt = nEnd - 1;
+ aWBnd = xBreak->nextWord( searchStr, nStt, aSrchPara.Locale,
+ WordType::ANYWORD_IGNOREWHITESPACES);
+ } while( aWBnd.startPos != aWBnd.endPos ||
+ (aWBnd.endPos != searchStr.getLength() && aWBnd.endPos != nEnd) );
+ // #i50244# aWBnd.endPos != nEnd : in case there is _no_ word (only
+ // whitespace) in searchStr, getWordBoundary() returned startPos,startPos
+ // and nextWord() does also => don't loop forever.
+ return aRet;
+}
+
+SearchResult TextSearch::ApproxSrchBkwrd( const OUString& searchStr,
+ sal_Int32 startPos, sal_Int32 endPos )
+{
+ SearchResult aRet;
+ aRet.subRegExpressions = 0;
+
+ if( !xBreak.is() )
+ return aRet;
+
+ sal_Int32 nStt, nEnd;
+
+ Boundary aWBnd = xBreak->getWordBoundary( searchStr, startPos,
+ aSrchPara.Locale,
+ WordType::ANYWORD_IGNOREWHITESPACES, true );
+
+ do
+ {
+ if( aWBnd.endPos <= endPos )
+ break;
+ nStt = aWBnd.startPos < endPos ? endPos : aWBnd.startPos;
+ nEnd = std::min(aWBnd.endPos, startPos);
+
+ if( nStt < nEnd &&
+ pWLD->WLD( searchStr.getStr() + nStt, nEnd - nStt ) <= nLimit )
+ {
+ aRet.subRegExpressions = 1;
+ aRet.startOffset = { nEnd };
+ aRet.endOffset = { nStt };
+ break;
+ }
+ if( !nStt )
+ break;
+
+ aWBnd = xBreak->previousWord( searchStr, nStt, aSrchPara.Locale,
+ WordType::ANYWORD_IGNOREWHITESPACES);
+ } while( aWBnd.startPos != aWBnd.endPos || aWBnd.endPos != searchStr.getLength() );
+ return aRet;
+}
+
+
+namespace {
+void setWildcardMatch( css::util::SearchResult& rRes, sal_Int32 nStartOffset, sal_Int32 nEndOffset )
+{
+ rRes.subRegExpressions = 1;
+ rRes.startOffset = { nStartOffset };
+ rRes.endOffset = { nEndOffset };
+}
+}
+
+SearchResult TextSearch::WildcardSrchFrwrd( const OUString& searchStr, sal_Int32 nStartPos, sal_Int32 nEndPos )
+{
+ SearchResult aRes;
+ aRes.subRegExpressions = 0; // no match
+ sal_Int32 nStartOffset = nStartPos;
+ sal_Int32 nEndOffset = nEndPos;
+
+ const sal_Int32 nStringLen = searchStr.getLength();
+
+ // Forward nStartPos inclusive, nEndPos exclusive, but allow for empty
+ // string match with [0,0).
+ if (nStartPos < 0 || nEndPos > nStringLen || nEndPos < nStartPos ||
+ (nStartPos == nStringLen && (nStringLen != 0 || nStartPos != nEndPos)))
+ return aRes;
+
+ const OUString& rPattern = (bUsePrimarySrchStr ? sSrchStr : sSrchStr2);
+ const sal_Int32 nPatternLen = rPattern.getLength();
+
+ // Handle special cases empty pattern and/or string outside of the loop to
+ // not add performance penalties there and simplify.
+ if (nStartPos == nEndPos)
+ {
+ sal_Int32 i = 0;
+ while (i < nPatternLen && rPattern[i] == '*')
+ ++i;
+ if (i == nPatternLen)
+ setWildcardMatch( aRes, nStartOffset, nEndOffset);
+ return aRes;
+ }
+
+ // Empty pattern does not match any non-empty string.
+ if (!nPatternLen)
+ return aRes;
+
+ bool bRewind = false;
+ sal_uInt32 cPattern = 0;
+ sal_Int32 nPattern = 0;
+ sal_Int32 nAfterFakePattern = nPattern;
+ if (mbWildcardAllowSubstring)
+ {
+ // Fake a leading '*' wildcard.
+ cPattern = '*';
+ bRewind = true;
+ // Assume a non-'*' pattern character follows. If it is a '*' instead
+ // that will be handled in the loop by setting nPat.
+ sal_uInt32 cu = rPattern.iterateCodePoints( &nAfterFakePattern);
+ if (cu == mcWildcardEscapeChar && mcWildcardEscapeChar && nAfterFakePattern < nPatternLen)
+ rPattern.iterateCodePoints( &nAfterFakePattern);
+ }
+
+ sal_Int32 nString = nStartPos, nPat = -1, nStr = -1, nLastAsterisk = -1;
+ sal_uInt32 cPatternAfterAsterisk = 0;
+ bool bEscaped = false, bEscapedAfterAsterisk = false;
+
+ // The loop code tries to avoid costly calls to iterateCodePoints() when
+ // possible.
+
+ do
+ {
+ if (bRewind)
+ {
+ // Reuse cPattern after '*', nPattern was correspondingly
+ // incremented to point behind cPattern.
+ bRewind = false;
+ }
+ else if (nPattern < nPatternLen)
+ {
+ // nPattern will be incremented by iterateCodePoints().
+ cPattern = rPattern.iterateCodePoints( &nPattern);
+ if (cPattern == mcWildcardEscapeChar && mcWildcardEscapeChar && nPattern < nPatternLen)
+ {
+ bEscaped = true;
+ cPattern = rPattern.iterateCodePoints( &nPattern);
+ }
+ }
+ else
+ {
+ // A trailing '*' is handled below.
+ if (mbWildcardAllowSubstring)
+ {
+ // If the pattern is consumed and substring match allowed we're good.
+ setWildcardMatch( aRes, nStartOffset, nString);
+ return aRes;
+ }
+ else if (nString < nEndPos && nLastAsterisk >= 0)
+ {
+ // If substring match is not allowed try a greedy '*' match.
+ nPattern = nLastAsterisk;
+ continue; // do
+ }
+ else
+ return aRes;
+ }
+
+ if (cPattern == '*' && !bEscaped)
+ {
+ // '*' is one code unit, so not using iterateCodePoints() is ok.
+ while (nPattern < nPatternLen && rPattern[nPattern] == '*')
+ ++nPattern;
+
+ if (nPattern >= nPatternLen)
+ {
+ // Last pattern is '*', remaining string matches.
+ setWildcardMatch( aRes, nStartOffset, nEndOffset);
+ return aRes;
+ }
+
+ nLastAsterisk = nPattern; // Remember last encountered '*'.
+
+ // cPattern will be the next non-'*' character, nPattern
+ // incremented.
+ cPattern = rPattern.iterateCodePoints( &nPattern);
+ if (cPattern == mcWildcardEscapeChar && mcWildcardEscapeChar && nPattern < nPatternLen)
+ {
+ bEscaped = true;
+ cPattern = rPattern.iterateCodePoints( &nPattern);
+ }
+
+ cPatternAfterAsterisk = cPattern;
+ bEscapedAfterAsterisk = bEscaped;
+ nPat = nPattern; // Remember position of pattern behind '*', already incremented.
+ nStr = nString; // Remember the current string to be matched.
+ }
+
+ if (nString >= nEndPos)
+ // Whatever follows in pattern, string will not match.
+ return aRes;
+
+ // nString will be incremented by iterateCodePoints().
+ sal_uInt32 cString = searchStr.iterateCodePoints( &nString);
+
+ if ((cPattern != '?' || bEscaped) && cPattern != cString)
+ {
+ if (nPat == -1)
+ // Non-match already without any '*' pattern.
+ return aRes;
+
+ bRewind = true;
+ nPattern = nPat; // Rewind pattern to character behind '*', already incremented.
+ cPattern = cPatternAfterAsterisk;
+ bEscaped = bEscapedAfterAsterisk;
+ searchStr.iterateCodePoints( &nStr);
+ nString = nStr; // Restore incremented remembered string position.
+ if (nPat == nAfterFakePattern)
+ {
+ // Next start offset will be the next character.
+ nStartOffset = nString;
+ }
+ }
+ else
+ {
+ // An unescaped '?' pattern matched any character, or characters
+ // matched. Reset only escaped state.
+ bEscaped = false;
+ }
+ }
+ while (nString < nEndPos);
+
+ if (bRewind)
+ return aRes;
+
+ // Eat trailing '*' pattern that matches anything, including nothing.
+ // '*' is one code unit, so not using iterateCodePoints() is ok.
+ while (nPattern < nPatternLen && rPattern[nPattern] == '*')
+ ++nPattern;
+
+ if (nPattern == nPatternLen)
+ setWildcardMatch( aRes, nStartOffset, nEndOffset);
+ return aRes;
+}
+
+SearchResult TextSearch::WildcardSrchBkwrd( const OUString& searchStr, sal_Int32 nStartPos, sal_Int32 nEndPos )
+{
+ SearchResult aRes;
+ aRes.subRegExpressions = 0; // no match
+
+ sal_Int32 nStartOffset = nStartPos;
+ sal_Int32 nEndOffset = nEndPos;
+
+ const sal_Int32 nStringLen = searchStr.getLength();
+
+ // Backward nStartPos exclusive, nEndPos inclusive, but allow for empty
+ // string match with (0,0].
+ if (nStartPos > nStringLen || nEndPos < 0 || nStartPos < nEndPos ||
+ (nEndPos == nStringLen && (nStringLen != 0 || nStartPos != nEndPos)))
+ return aRes;
+
+ const OUString& rPattern = (bUsePrimarySrchStr ? sSrchStr : sSrchStr2);
+ sal_Int32 nPatternLen = rPattern.getLength();
+
+ // Handle special cases empty pattern and/or string outside of the loop to
+ // not add performance penalties there and simplify.
+ if (nStartPos == nEndPos)
+ {
+ sal_Int32 i = 0;
+ while (i < nPatternLen && rPattern[i] == '*')
+ ++i;
+ if (i == nPatternLen)
+ setWildcardMatch( aRes, nStartOffset, nEndOffset);
+ return aRes;
+ }
+
+ // Empty pattern does not match any non-empty string.
+ if (!nPatternLen)
+ return aRes;
+
+ // Reverse escaped patterns to ease the handling of escapes, keeping escape
+ // and following character as one sequence in backward direction.
+ if ((bUsePrimarySrchStr && maWildcardReversePattern.isEmpty()) ||
+ (!bUsePrimarySrchStr && maWildcardReversePattern2.isEmpty()))
+ {
+ OUStringBuffer aPatternBuf( rPattern);
+ sal_Int32 nIndex = 0;
+ while (nIndex < nPatternLen)
+ {
+ const sal_Int32 nOld = nIndex;
+ const sal_uInt32 cu = rPattern.iterateCodePoints( &nIndex);
+ if (cu == mcWildcardEscapeChar)
+ {
+ if (nIndex < nPatternLen)
+ {
+ if (nIndex - nOld == 1)
+ {
+ // Simply move code units, we already memorized the one
+ // in 'cu'.
+ const sal_Int32 nOld2 = nIndex;
+ rPattern.iterateCodePoints( &nIndex);
+ for (sal_Int32 i=0; i < nIndex - nOld2; ++i)
+ aPatternBuf[nOld+i] = rPattern[nOld2+i];
+ aPatternBuf[nIndex-1] = static_cast<sal_Unicode>(cu);
+ }
+ else
+ {
+ // Copy the escape character code units first in the
+ // unlikely case that it would not be of BMP.
+ assert(nIndex - nOld == 2); // it's UTF-16, so...
+ sal_Unicode buf[2];
+ buf[0] = rPattern[nOld];
+ buf[1] = rPattern[nOld+1];
+ const sal_Int32 nOld2 = nIndex;
+ rPattern.iterateCodePoints( &nIndex);
+ for (sal_Int32 i=0; i < nIndex - nOld2; ++i)
+ aPatternBuf[nOld+i] = rPattern[nOld2+i];
+ aPatternBuf[nIndex-2] = buf[0];
+ aPatternBuf[nIndex-1] = buf[1];
+ }
+ }
+ else
+ {
+ // Trailing escape would become leading escape, do what?
+ // Eliminate.
+ aPatternBuf.remove( nOld, nIndex - nOld);
+ }
+ }
+ }
+ if (bUsePrimarySrchStr)
+ maWildcardReversePattern = aPatternBuf.makeStringAndClear();
+ else
+ maWildcardReversePattern2 = aPatternBuf.makeStringAndClear();
+ }
+ const OUString& rReversePattern = (bUsePrimarySrchStr ? maWildcardReversePattern : maWildcardReversePattern2);
+ nPatternLen = rReversePattern.getLength();
+
+ bool bRewind = false;
+ sal_uInt32 cPattern = 0;
+ sal_Int32 nPattern = nPatternLen;
+ sal_Int32 nAfterFakePattern = nPattern;
+ if (mbWildcardAllowSubstring)
+ {
+ // Fake a trailing '*' wildcard.
+ cPattern = '*';
+ bRewind = true;
+ // Assume a non-'*' pattern character follows. If it is a '*' instead
+ // that will be handled in the loop by setting nPat.
+ sal_uInt32 cu = rReversePattern.iterateCodePoints( &nAfterFakePattern, -1);
+ if (cu == mcWildcardEscapeChar && mcWildcardEscapeChar && nAfterFakePattern > 0)
+ rReversePattern.iterateCodePoints( &nAfterFakePattern, -1);
+ }
+
+ sal_Int32 nString = nStartPos, nPat = -1, nStr = -1, nLastAsterisk = -1;
+ sal_uInt32 cPatternAfterAsterisk = 0;
+ bool bEscaped = false, bEscapedAfterAsterisk = false;
+
+ // The loop code tries to avoid costly calls to iterateCodePoints() when
+ // possible.
+
+ do
+ {
+ if (bRewind)
+ {
+ // Reuse cPattern after '*', nPattern was correspondingly
+ // decremented to point before cPattern.
+ bRewind = false;
+ }
+ else if (nPattern > 0)
+ {
+ // nPattern will be decremented by iterateCodePoints().
+ cPattern = rReversePattern.iterateCodePoints( &nPattern, -1);
+ if (cPattern == mcWildcardEscapeChar && mcWildcardEscapeChar && nPattern > 0)
+ {
+ bEscaped = true;
+ cPattern = rReversePattern.iterateCodePoints( &nPattern, -1);
+ }
+ }
+ else
+ {
+ // A trailing '*' is handled below.
+ if (mbWildcardAllowSubstring)
+ {
+ // If the pattern is consumed and substring match allowed we're good.
+ setWildcardMatch( aRes, nStartOffset, nString);
+ return aRes;
+ }
+ else if (nString > nEndPos && nLastAsterisk >= 0)
+ {
+ // If substring match is not allowed try a greedy '*' match.
+ nPattern = nLastAsterisk;
+ continue; // do
+ }
+ else
+ return aRes;
+ }
+
+ if (cPattern == '*' && !bEscaped)
+ {
+ // '*' is one code unit, so not using iterateCodePoints() is ok.
+ while (nPattern > 0 && rReversePattern[nPattern-1] == '*')
+ --nPattern;
+
+ if (nPattern <= 0)
+ {
+ // First pattern is '*', remaining string matches.
+ setWildcardMatch( aRes, nStartOffset, nEndOffset);
+ return aRes;
+ }
+
+ nLastAsterisk = nPattern; // Remember last encountered '*'.
+
+ // cPattern will be the previous non-'*' character, nPattern
+ // decremented.
+ cPattern = rReversePattern.iterateCodePoints( &nPattern, -1);
+ if (cPattern == mcWildcardEscapeChar && mcWildcardEscapeChar && nPattern > 0)
+ {
+ bEscaped = true;
+ cPattern = rReversePattern.iterateCodePoints( &nPattern, -1);
+ }
+
+ cPatternAfterAsterisk = cPattern;
+ bEscapedAfterAsterisk = bEscaped;
+ nPat = nPattern; // Remember position of pattern before '*', already decremented.
+ nStr = nString; // Remember the current string to be matched.
+ }
+
+ if (nString <= nEndPos)
+ // Whatever leads in pattern, string will not match.
+ return aRes;
+
+ // nString will be decremented by iterateCodePoints().
+ sal_uInt32 cString = searchStr.iterateCodePoints( &nString, -1);
+
+ if ((cPattern != '?' || bEscaped) && cPattern != cString)
+ {
+ if (nPat == -1)
+ // Non-match already without any '*' pattern.
+ return aRes;
+
+ bRewind = true;
+ nPattern = nPat; // Rewind pattern to character before '*', already decremented.
+ cPattern = cPatternAfterAsterisk;
+ bEscaped = bEscapedAfterAsterisk;
+ searchStr.iterateCodePoints( &nStr, -1);
+ nString = nStr; // Restore decremented remembered string position.
+ if (nPat == nAfterFakePattern)
+ {
+ // Next start offset will be this character (exclusive).
+ nStartOffset = nString;
+ }
+ }
+ else
+ {
+ // An unescaped '?' pattern matched any character, or characters
+ // matched. Reset only escaped state.
+ bEscaped = false;
+ }
+ }
+ while (nString > nEndPos);
+
+ if (bRewind)
+ return aRes;
+
+ // Eat leading '*' pattern that matches anything, including nothing.
+ // '*' is one code unit, so not using iterateCodePoints() is ok.
+ while (nPattern > 0 && rReversePattern[nPattern-1] == '*')
+ --nPattern;
+
+ if (nPattern == 0)
+ setWildcardMatch( aRes, nStartOffset, nEndOffset);
+ return aRes;
+}
+
+
+OUString SAL_CALL
+TextSearch::getImplementationName()
+{
+ return "com.sun.star.util.TextSearch_i18n";
+}
+
+sal_Bool SAL_CALL TextSearch::supportsService(const OUString& rServiceName)
+{
+ return cppu::supportsService(this, rServiceName);
+}
+
+Sequence< OUString > SAL_CALL
+TextSearch::getSupportedServiceNames()
+{
+ return { "com.sun.star.util.TextSearch", "com.sun.star.util.TextSearch2" };
+}
+
+extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface*
+i18npool_TextSearch_get_implementation(
+ css::uno::XComponentContext* context , css::uno::Sequence<css::uno::Any> const&)
+{
+ return cppu::acquire(new TextSearch(context));
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/i18npool/source/search/textsearch.hxx b/i18npool/source/search/textsearch.hxx
new file mode 100644
index 000000000..43a643537
--- /dev/null
+++ b/i18npool/source/search/textsearch.hxx
@@ -0,0 +1,161 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed
+ * with this work for additional information regarding copyright
+ * ownership. The ASF licenses this file to you under the Apache
+ * License, Version 2.0 (the "License"); you may not use this file
+ * except in compliance with the License. You may obtain a copy of
+ * the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#ifndef INCLUDED_I18NPOOL_SOURCE_SEARCH_TEXTSEARCH_HXX
+#define INCLUDED_I18NPOOL_SOURCE_SEARCH_TEXTSEARCH_HXX
+
+#include <cppuhelper/implbase.hxx>
+#include <com/sun/star/util/XTextSearch2.hpp>
+#include <com/sun/star/lang/XServiceInfo.hpp>
+
+#include <map>
+#include <memory>
+#include <mutex>
+
+#include <unicode/regex.h>
+#include <unicode/unistr.h>
+#include <unicode/uversion.h>
+
+namespace com::sun::star::i18n { class XBreakIterator; }
+namespace com::sun::star::i18n { class XCharacterClassification; }
+namespace com::sun::star::i18n { class XExtendedTransliteration; }
+namespace com::sun::star::uno { class XComponentContext; }
+
+
+class WLevDistance;
+typedef ::std::map< sal_Unicode, sal_Int32 > TextSearchJumpTable;
+
+class TextSearch: public cppu::WeakImplHelper
+<
+ css::util::XTextSearch2,
+ css::lang::XServiceInfo
+>
+{
+ std::mutex m_aMutex;
+ css::uno::Reference < css::uno::XComponentContext > m_xContext;
+
+ css::util::SearchOptions2 aSrchPara;
+ OUString sSrchStr;
+ OUString sSrchStr2;
+
+ mutable css::uno::Reference< css::i18n::XCharacterClassification > xCharClass;
+
+ css::uno::Reference< css::i18n::XExtendedTransliteration > xTranslit;
+ css::uno::Reference< css::i18n::XExtendedTransliteration > xTranslit2;
+
+ // define a function pointer for the different search methods
+ typedef css::util::SearchResult
+ (SAL_CALL TextSearch::*FnSrch)( const OUString& searchStr,
+ sal_Int32 startPos, sal_Int32 endPos );
+
+ FnSrch fnForward;
+ FnSrch fnBackward;
+
+ // to fix UX regression, U+0027 matches also U+2019 in non-regex search
+ bool bSearchApostrophe;
+
+ // Members and methods for the normal (Boyer-Moore) search
+ std::unique_ptr<TextSearchJumpTable> pJumpTable;
+ std::unique_ptr<TextSearchJumpTable> pJumpTable2;
+ bool bIsForwardTab;
+ bool bUsePrimarySrchStr;
+ void MakeForwardTab();
+ void MakeForwardTab2();
+ void MakeBackwardTab();
+ void MakeBackwardTab2();
+ sal_Int32 GetDiff( const sal_Unicode ) const;
+ /// @throws css::uno::RuntimeException
+ css::util::SearchResult SAL_CALL
+ NSrchFrwrd( const OUString& searchStr,
+ sal_Int32 startPos, sal_Int32 endPos );
+ /// @throws css::uno::RuntimeException
+ css::util::SearchResult SAL_CALL
+ NSrchBkwrd( const OUString& searchStr,
+ sal_Int32 startPos, sal_Int32 endPos );
+
+ // Members and methods for the regular expression search
+ std::unique_ptr<icu::RegexMatcher> pRegexMatcher;
+ /// @throws css::uno::RuntimeException
+ css::util::SearchResult SAL_CALL
+ RESrchFrwrd( const OUString& searchStr,
+ sal_Int32 startPos, sal_Int32 endPos );
+ /// @throws css::uno::RuntimeException
+ css::util::SearchResult SAL_CALL
+ RESrchBkwrd( const OUString& searchStr,
+ sal_Int32 startPos, sal_Int32 endPos );
+ void RESrchPrepare( const css::util::SearchOptions2&);
+
+ // Members and methods for the "Weight Levenshtein-Distance" search
+ int nLimit;
+ std::unique_ptr<WLevDistance> pWLD;
+ css::uno::Reference < css::i18n::XBreakIterator > xBreak;
+ /// @throws css::uno::RuntimeException
+ css::util::SearchResult SAL_CALL
+ ApproxSrchFrwrd( const OUString& searchStr,
+ sal_Int32 startPos, sal_Int32 endPos );
+ /// @throws css::uno::RuntimeException
+ css::util::SearchResult SAL_CALL
+ ApproxSrchBkwrd( const OUString& searchStr,
+ sal_Int32 startPos, sal_Int32 endPos );
+
+ // Members and methods for the wildcard search
+ OUString maWildcardReversePattern;
+ OUString maWildcardReversePattern2;
+ sal_uInt32 mcWildcardEscapeChar;
+ bool mbWildcardAllowSubstring;
+ /// @throws css::uno::RuntimeException
+ css::util::SearchResult SAL_CALL
+ WildcardSrchFrwrd( const OUString& searchStr,
+ sal_Int32 startPos, sal_Int32 endPos );
+ /// @throws css::uno::RuntimeException
+ css::util::SearchResult SAL_CALL
+ WildcardSrchBkwrd( const OUString& searchStr,
+ sal_Int32 startPos, sal_Int32 endPos );
+
+ bool IsDelimiter( const OUString& rStr, sal_Int32 nPos ) const;
+
+public:
+ explicit TextSearch(
+ const css::uno::Reference < css::uno::XComponentContext >& rxContext );
+
+ virtual ~TextSearch() override;
+
+ // XTextSearch
+ virtual void SAL_CALL
+ setOptions( const css::util::SearchOptions& options ) override;
+ virtual css::util::SearchResult SAL_CALL
+ searchForward( const OUString& searchStr,
+ sal_Int32 startPos, sal_Int32 endPos ) override;
+ virtual css::util::SearchResult SAL_CALL
+ searchBackward( const OUString& searchStr,
+ sal_Int32 startPos, sal_Int32 endPos ) override;
+
+ // XTextSearch2
+ virtual void SAL_CALL
+ setOptions2( const css::util::SearchOptions2& options ) override;
+
+ //XServiceInfo
+ virtual OUString SAL_CALL getImplementationName() override;
+ virtual sal_Bool SAL_CALL supportsService(const OUString& ServiceName) override;
+ virtual css::uno::Sequence< OUString > SAL_CALL getSupportedServiceNames() override;
+};
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */