/**************************************************************
 * 
 * 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
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/



// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_i18npool.hxx"

#include <inputsequencechecker_hi.hxx>

using namespace rtl;

namespace com { 
namespace sun { 
namespace star { 
namespace i18n {

InputSequenceChecker_hi::InputSequenceChecker_hi()
{
	serviceName = "com.sun.star.i18n.InputSequenceChecker_hi";
}

InputSequenceChecker_hi::~InputSequenceChecker_hi()
{
}
/* Non-Defined Class type */
#define __ND		0

/*
 * Devanagari character type definitions
 */
#define __UP  1  // ChandraBindu & Anuswar
#define	__NP  2  // Visarg
#define __IV	3  // Independant Vowels
#define __CN	4  // Consonants except _CK & _RC 
#define __CK	5  // Consonants that can be followed by Nukta
#define __RC	6  // Ra
#define __NM	7  // Matra
#define __RM	8  // Ra + HAL
#define __IM	9  // Choti I Matra
#define __HL	10 // HAL
#define __NK	11 // Nukta
#define __VD	12 // Vedic
#define __HD	13 // Hindu Numerals

/*
 * Devanagari character type table
 */
static const sal_uInt16 devaCT[128] = {
/*         0,    1,    2,    3,    4,    5,    6,    7,
           8,    9,    A,    B,    C,    D,    E,    F, */
/* 0900 */ __ND, __UP, __UP, __NP, __ND, __IV, __IV, __IV,
           __IV, __IV, __IV, __IV, __IV, __IV, __IV, __IV,
/* 0910 */ __IV, __IV, __IV, __IV, __IV, __CK, __CK, __CK,
           __CN, __CN, __CN, __CN, __CK, __CN, __CN, __CN,
/* 0920 */ __CN, __CK, __CK, __CN, __CN, __CN, __CN, __CN,
           __CN, __CN, __CN, __CK, __CN, __CN, __CN, __CN,
/* 0930 */ __RC, __CN, __CN, __CN, __CN, __CN, __CN, __CN,
           __CN, __CN, __ND, __ND, __NK, __VD, __NM, __IM,
/* 0940 */ __RM, __NM, __NM, __NM, __NM, __RM, __RM, __RM,
           __RM, __RM, __RM, __RM, __RM, __HL, __ND, __ND,
/* 0950 */ __ND, __VD, __VD, __VD, __VD, __ND, __ND, __ND,
           __CN, __CN, __CN, __CN, __CN, __CN, __CN, __CN,
/* 0960 */ __IV, __IV, __NM, __NM, __ND, __ND, __HD, __HD,
           __HD, __HD, __HD, __HD, __HD, __HD, __HD, __HD,
/* 0970 */ __ND, __ND, __ND, __ND, __ND, __ND, __ND, __ND,
           __ND, __ND, __ND, __ND, __ND, __ND, __ND, __ND,
};

/*
 * Devanagari character composition table
 */
static const sal_uInt16 dev_cell_check[14][14] = {
  /*        ND, UP, NP, IV, CN, CK, RC, NM, RM, IM, HL, NK, VD, HD, */
  /* 0  */ { 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0 }, /* ND */
  /* 1  */ { 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0 }, /* UP */
  /* 2  */ { 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0 }, /* NP */
  /* 3  */ { 0,  1,  1,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0 }, /* IV */
  /* 4  */ { 0,  1,  1,  0,  0,  0,  0,  1,  1,  1,  1,  0,  0,  0 }, /* CN */
  /* 5  */ { 0,  1,  1,  0,  0,  0,  0,  1,  1,  1,  1,  1,  0,  0 }, /* CK */
  /* 6  */ { 0,  1,  1,  0,  0,  0,  0,  1,  1,  1,  1,  0,  0,  0 }, /* RC */
  /* 7  */ { 0,  1,  1,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0 }, /* NM */
  /* 8  */ { 0,  1,  1,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0 }, /* RM */
  /* 9  */ { 0,  1,  1,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0 }, /* IM */
  /* 10 */ { 0,  0,  0,  0,  1,  1,  1,  0,  0,  0,  0,  0,  0,  0 }, /* HL */
  /* 11 */ { 0,  1,  1,  0,  0,  0,  0,  1,  1,  1,  1,  0,  0,  0 }, /* NK */
  /* 12 */ { 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0 }, /* VD */
  /* 13 */ { 0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0 }  /* HD */
};

sal_Bool _DEV_Composible[2][2] = {
/* Mode 0 */    {sal_True, sal_True }, // PASSTHROUGH = 0
/* Mode 1 */    {sal_False, sal_True}  // STRICT = 1
};

#define getCharType(x) \
	((x >= 0x0900 && x < 0x097f) ? devaCT[x - 0x0900] : __ND)

sal_Bool SAL_CALL 
InputSequenceChecker_hi::checkInputSequence(const OUString& Text, 
                                            sal_Int32       nStartPos,
                                            sal_Unicode     inputChar, 
                                            sal_Int16       inputCheckMode) 
  throw(com::sun::star::uno::RuntimeException)
{
	sal_Unicode currentChar = Text[nStartPos];
  sal_uInt16  ch1 = getCharType(inputChar);
	sal_uInt16  ch2 = getCharType(currentChar);

	return (_DEV_Composible[inputCheckMode][dev_cell_check[ch2][ch1]]);
}

sal_Int32 SAL_CALL 
InputSequenceChecker_hi::correctInputSequence(OUString& Text, 
                                            sal_Int32       nStartPos,
                                            sal_Unicode     inputChar, 
                                            sal_Int16       inputCheckMode) 
  throw(com::sun::star::uno::RuntimeException)
{
    if (checkInputSequence(Text, nStartPos, inputChar, inputCheckMode))
        Text = Text.replaceAt(++nStartPos, 0, OUString(inputChar));
    else 
        nStartPos=Text.getLength();
    return nStartPos;
}
} } } }