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/* -*- 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 <i18nutil/widthfolding.hxx>
#include <com/sun/star/uno/Sequence.hxx>
#include "widthfolding_data.h"
using namespace com::sun::star::uno;
namespace i18nutil {
sal_Unicode widthfolding::decompose_ja_voiced_sound_marksChar2Char (sal_Unicode inChar)
{
if (0x30a0 <= inChar && inChar <= 0x30ff) {
sal_Int16 i = inChar - 0x3040;
if (decomposition_table[i].decomposited_character_1)
return 0xFFFF;
}
return inChar;
}
/**
* Decompose Japanese specific voiced and semi-voiced sound marks.
*/
OUString widthfolding::decompose_ja_voiced_sound_marks (const OUString& inStr, sal_Int32 startPos, sal_Int32 nCount, Sequence< sal_Int32 >& offset, bool useOffset )
{
// Create a string buffer which can hold nCount * 2 + 1 characters.
// Its size may become double of nCount.
// The reference count is 1 now.
rtl_uString * newStr = rtl_uString_alloc(nCount * 2);
sal_Int32 *p = nullptr;
sal_Int32 position = 0;
if (useOffset) {
// Allocate double of nCount length to offset argument.
offset.realloc( nCount * 2 );
p = offset.getArray();
position = startPos;
}
// Prepare pointers of unicode character arrays.
const sal_Unicode* src = inStr.getStr() + startPos;
sal_Unicode* dst = newStr->buffer;
// Decomposition: GA --> KA + voice-mark
while (nCount -- > 0) {
sal_Unicode c = *src++;
// see http://charts.unicode.org/Web/U3040.html Hiragana (U+3040..U+309F)
// see http://charts.unicode.org/Web/U30A0.html Katakana (U+30A0..U+30FF)
// Hiragana is not applied to decomposition.
// Only Katakana is applied to decomposition
if (0x30a0 <= c && c <= 0x30ff) {
int i = int(c - 0x3040);
sal_Unicode first = decomposition_table[i].decomposited_character_1;
if (first != 0x0000) {
*dst ++ = first;
*dst ++ = decomposition_table[i].decomposited_character_2; // second
if (useOffset) {
*p ++ = position;
*p ++ = position ++;
}
continue;
}
}
*dst ++ = c;
if (useOffset)
*p ++ = position ++;
}
*dst = u'\0';
newStr->length = sal_Int32(dst - newStr->buffer);
if (useOffset)
offset.realloc(newStr->length);
return OUString(newStr, SAL_NO_ACQUIRE); // take ownership
}
oneToOneMapping& widthfolding::getfull2halfTable()
{
static oneToOneMappingWithFlag table(full2half, sizeof(full2half), FULL2HALF_NORMAL);
table.makeIndex();
return table;
}
/**
* Compose Japanese specific voiced and semi-voiced sound marks.
*/
OUString widthfolding::compose_ja_voiced_sound_marks (const OUString& inStr, sal_Int32 startPos, sal_Int32 nCount, Sequence< sal_Int32 >& offset, bool useOffset, sal_Int32 nFlags )
{
// Create a string buffer which can hold nCount + 1 characters.
// Its size may become equal to nCount or smaller.
// The reference count is 1 now.
rtl_uString * newStr = rtl_uString_alloc(nCount);
// Prepare pointers of unicode character arrays.
const sal_Unicode* src = inStr.getStr() + startPos;
sal_Unicode* dst = newStr->buffer;
// This conversion algorithm requires at least one character.
if (nCount > 0) {
// .. .. KA VOICE .. ..
// ^ ^
// previousChar currentChar
// ^
// position
//
// will be converted to
// .. .. GA .. ..
sal_Int32 *p = nullptr;
sal_Int32 position = 0;
if (useOffset) {
// Allocate nCount length to offset argument.
offset.realloc( nCount );
p = offset.getArray();
position = startPos;
}
//
sal_Unicode previousChar = *src ++;
sal_Unicode currentChar;
// Composition: KA + voice-mark --> GA
while (-- nCount > 0) {
currentChar = *src ++;
// see http://charts.unicode.org/Web/U3040.html Hiragana (U+3040..U+309F)
// see http://charts.unicode.org/Web/U30A0.html Katakana (U+30A0..U+30FF)
// 0x3099 COMBINING KATAKANA-HIRAGANA VOICED SOUND MARK
// 0x309a COMBINING KATAKANA-HIRAGANA SEMI-VOICED SOUND MARK
// 0x309b KATAKANA-HIRAGANA VOICED SOUND MARK
// 0x309c KATAKANA-HIRAGANA SEMI-VOICED SOUND MARK
int j = currentChar - 0x3099; // 0x3099, 0x309a, 0x309b, 0x309c ?
if (2 <= j && j <= 3) // 0x309b or 0x309c
j -= 2;
if (0 <= j && j <= 1) {
// 0 addresses a code point regarding 0x3099 or 0x309b (voiced sound mark),
// 1 is 0x309a or 0x309c (semi-voiced sound mark)
int i = int(previousChar - 0x3040); // i acts as an index of array
bool bCompose = false;
if (0 <= i && i <= (0x30ff - 0x3040) && composition_table[i][j])
bCompose = true;
// not to use combined KATAKANA LETTER VU
if ( previousChar == 0x30a6 && (nFlags & WIDTHFOLDING_DONT_USE_COMBINED_VU) )
bCompose = false;
if( bCompose ){
if (useOffset) {
position ++;
*p ++ = position ++;
}
*dst ++ = composition_table[i][j];
previousChar = *src ++;
nCount --;
continue;
}
}
if (useOffset)
*p ++ = position ++;
*dst ++ = previousChar;
previousChar = currentChar;
}
if (nCount == 0) {
if (useOffset)
*p = position;
*dst ++ = previousChar;
}
*dst = u'\0';
newStr->length = sal_Int32(dst - newStr->buffer);
}
if (useOffset)
offset.realloc(newStr->length);
return OUString(newStr, SAL_NO_ACQUIRE); // take ownership
}
oneToOneMapping& widthfolding::gethalf2fullTable()
{
static oneToOneMappingWithFlag table(half2full, sizeof(half2full), HALF2FULL_NORMAL);
table.makeIndex();
return table;
}
sal_Unicode widthfolding::getCompositionChar(sal_Unicode c1, sal_Unicode c2)
{
return composition_table[c1 - 0x3040][c2 - 0x3099];
}
oneToOneMapping& widthfolding::getfull2halfTableForASC()
{
static oneToOneMappingWithFlag table(full2half, sizeof(full2half), FULL2HALF_ASC_FUNCTION);
table.makeIndex();
return table;
}
oneToOneMapping& widthfolding::gethalf2fullTableForJIS()
{
static oneToOneMappingWithFlag table(half2full, sizeof(half2full), HALF2FULL_JIS_FUNCTION);
table.makeIndex();
return table;
}
oneToOneMapping& widthfolding::getfullKana2halfKanaTable()
{
static oneToOneMappingWithFlag table(full2half, sizeof(full2half), FULL2HALF_KATAKANA_ONLY);
table.makeIndex();
return table;
}
oneToOneMapping& widthfolding::gethalfKana2fullKanaTable()
{
static oneToOneMappingWithFlag table(half2full, sizeof(half2full), HALF2FULL_KATAKANA_ONLY);
table.makeIndex();
return table;
}
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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