Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 233 insertions, 0 deletions

diff --git a/i18npool/source/breakiterator/breakiterator_th.cxx b/i18npool/source/breakiterator/breakiterator_th.cxx
new file mode 100644
index 000000000..d7accc160
--- /dev/null
+++ b/i18npool/source/breakiterator/breakiterator_th.cxx
@@ -0,0 +1,233 @@
+/* -*- 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 <com/sun/star/i18n/CharacterIteratorMode.hpp>
+#include <o3tl/safeint.hxx>
+#include <breakiterator_th.hxx>
+#include <wtt.h>
+
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+using namespace ::com::sun::star::i18n;
+using namespace ::com::sun::star::lang;
+
+namespace i18npool {
+
+/**
+ * Constructor.
+ */
+BreakIterator_th::BreakIterator_th()
+{
+    cBreakIterator = "com.sun.star.i18n.BreakIterator_th";
+    // to improve performance, alloc big enough memory in construct.
+    m_aNextCellIndex.assign(512, 0);
+    m_aPreviousCellIndex.assign(512, 0);
+    lineRule=nullptr;
+}
+
+/**
+ * Deconstructor.
+ */
+BreakIterator_th::~BreakIterator_th()
+{
+}
+
+sal_Int32 SAL_CALL BreakIterator_th::previousCharacters( const OUString& Text,
+    sal_Int32 nStartPos, const lang::Locale& rLocale,
+    sal_Int16 nCharacterIteratorMode, sal_Int32 nCount, sal_Int32& nDone )
+{
+    if (nCharacterIteratorMode == CharacterIteratorMode::SKIPCELL ) {
+        nDone = 0;
+        if (nStartPos > 0) {    // for others to skip cell.
+            makeIndex(Text, nStartPos);
+
+            if (m_aNextCellIndex[nStartPos-1] == 0) // not a CTL character
+                return BreakIterator_Unicode::previousCharacters(Text, nStartPos, rLocale,
+                    nCharacterIteratorMode, nCount, nDone);
+            else
+            {
+                while (nCount > 0 && m_aNextCellIndex[nStartPos - 1] > 0)
+                {
+                    nCount--; nDone++;
+                    nStartPos = m_aPreviousCellIndex[nStartPos - 1];
+                }
+            }
+        } else
+            nStartPos = 0;
+    } else { // for BS to delete one char.
+        for (nDone = 0; nDone < nCount && nStartPos > 0; nDone++)
+            Text.iterateCodePoints(&nStartPos, -1);
+    }
+
+    return nStartPos;
+}
+
+sal_Int32 SAL_CALL BreakIterator_th::nextCharacters(const OUString& Text,
+    sal_Int32 nStartPos, const lang::Locale& rLocale,
+    sal_Int16 nCharacterIteratorMode, sal_Int32 nCount, sal_Int32& nDone)
+{
+    sal_Int32 len = Text.getLength();
+    if (nCharacterIteratorMode == CharacterIteratorMode::SKIPCELL ) {
+        nDone = 0;
+        if (nStartPos < len) {
+            makeIndex(Text, nStartPos);
+
+            if (m_aNextCellIndex[nStartPos] == 0) // not a CTL character
+                return BreakIterator_Unicode::nextCharacters(Text, nStartPos, rLocale,
+                    nCharacterIteratorMode, nCount, nDone);
+            else
+            {
+                while (nCount > 0 && m_aNextCellIndex[nStartPos] > 0)
+                {
+                    nCount--; nDone++;
+                    nStartPos = m_aNextCellIndex[nStartPos];
+                }
+            }
+        } else
+            nStartPos = len;
+    } else {
+        for (nDone = 0; nDone < nCount && nStartPos < Text.getLength(); nDone++)
+            Text.iterateCodePoints(&nStartPos);
+    }
+
+    return nStartPos;
+}
+
+// Make sure line is broken on cell boundary if we implement cell iterator.
+LineBreakResults SAL_CALL BreakIterator_th::getLineBreak(
+    const OUString& Text, sal_Int32 nStartPos,
+    const lang::Locale& rLocale, sal_Int32 nMinBreakPos,
+    const LineBreakHyphenationOptions& hOptions,
+    const LineBreakUserOptions& bOptions )
+{
+    LineBreakResults lbr = BreakIterator_Unicode::getLineBreak(Text, nStartPos,
+                    rLocale, nMinBreakPos, hOptions, bOptions );
+    if (lbr.breakIndex < Text.getLength()) {
+        makeIndex(Text, lbr.breakIndex);
+        lbr.breakIndex = m_aPreviousCellIndex[ lbr.breakIndex ];
+    }
+    return lbr;
+}
+
+#define SARA_AM 0x0E33
+
+/*
+ * cell composition states
+ */
+
+#define ST_COM  1   // Compose the following character with leading char and display in the same cell
+#define ST_NXT  2   // display the following character in the next cell
+#define ST_NDP  3   // non-display
+
+const sal_Int16 thaiCompRel[MAX_CT][MAX_CT] = {
+    //  C  N  C  L  F  F  F  B  B  B  T  A  A  A  A  A  A
+    //  T  O  O  V  V  V  V  V  V  D  O  D  D  D  V  V  V
+    //  R  N  N     1  2  3  1  2     N  1  2  3  1  2  3
+    //  L     S                       E
+    //  0  1  2  3  4  5  6  7  8  9  10 11 12 13 14 15 16
+    {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT   }, // CTRL 0
+    {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT   }, // NON  1
+    {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_COM, ST_COM, ST_COM, ST_COM, ST_COM, ST_COM, ST_COM, ST_COM, ST_COM, ST_COM   }, // CONS 2
+    {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT   }, // LV   3
+    {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT   }, // FV1  4
+    {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT   }, // FV2  5
+    {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT   }, // FV3  6
+    {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_COM, ST_COM, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT   }, // BV1  7
+    {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_COM, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT   }, // BV2  8
+    {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT   }, // BD   9
+    {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT   }, // TONE 10
+    {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT   }, // AD1  11
+    {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT   }, // AD2  12
+    {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT   }, // AD3  13
+    {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_COM, ST_COM, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT   }, // AV1  14
+    {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_COM, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT   }, // AV2  15
+    {   ST_NDP, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_NXT, ST_COM, ST_NXT, ST_COM, ST_NXT, ST_NXT, ST_NXT, ST_NXT   } // AV3  16
+
+};
+
+const sal_uInt32 is_ST_COM = (1<<CT_CTRL)|(1<<CT_NON)|(1<<CT_CONS)|(1<<CT_TONE);
+
+static sal_uInt16 getCombState(const sal_Unicode *text, sal_Int32 pos)
+{
+    sal_uInt16 ch1 = getCharType(text[pos]);
+    sal_uInt16 ch2 = getCharType(text[pos+1]);
+
+    if (text[pos+1] == SARA_AM) {
+        if ((1 << ch1) & is_ST_COM)
+            return  ST_COM;
+        else
+            ch2 = CT_AD1;
+    }
+
+    return thaiCompRel[ch1][ch2];
+}
+
+
+static sal_Int32 getACell(const sal_Unicode *text, sal_Int32 pos, sal_Int32 len)
+{
+    sal_uInt32 curr = 1;
+    for (; pos + 1 < len && getCombState(text, pos) == ST_COM; curr++, pos++) {}
+    return curr;
+}
+
+#define is_Thai(c)  (0x0e00 <= c && c <= 0x0e7f) // Unicode definition for Thai
+
+void BreakIterator_th::makeIndex(const OUString& Text, sal_Int32 const nStartPos)
+{
+    if (Text != cachedText) {
+        cachedText = Text;
+        if (m_aNextCellIndex.size() < o3tl::make_unsigned(cachedText.getLength())) {
+            m_aNextCellIndex.resize(cachedText.getLength());
+            m_aPreviousCellIndex.resize(cachedText.getLength());
+        }
+        // reset nextCell for new Text
+        m_aNextCellIndex.assign(cachedText.getLength(), 0);
+    }
+    else if (nStartPos >= Text.getLength() || m_aNextCellIndex[nStartPos] > 0
+             || !is_Thai(Text[nStartPos]))
+        return;
+
+    const sal_Unicode* str = cachedText.getStr();
+    sal_Int32 const len = cachedText.getLength();
+
+    sal_Int32 startPos = nStartPos;
+    while (startPos > 0 && is_Thai(str[startPos-1])) startPos--;
+    sal_Int32 endPos = nStartPos;
+    while (endPos < len && is_Thai(str[endPos])) endPos++;
+
+    sal_Int32 start, end, pos;
+    pos = start = end = startPos;
+
+    assert(endPos >= 0 && o3tl::make_unsigned(endPos) <= m_aNextCellIndex.size());
+    while (pos < endPos) {
+        end += getACell(str, start, endPos);
+        assert(end >= 0 && o3tl::make_unsigned(end) <= m_aNextCellIndex.size());
+        while (pos < end) {
+            m_aNextCellIndex[pos] = end;
+            m_aPreviousCellIndex[pos] = start;
+            pos++;
+        }
+        start = end;
+    }
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */