LCOV - code coverage report
Current view: directory - intl/lwbrk/src - nsSampleWordBreaker.cpp (source / functions) Found Hit Coverage
Test: app.info Lines: 65 5 7.7 %
Date: 2012-06-02 Functions: 10 6 60.0 %

       1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2                 : /* ***** BEGIN LICENSE BLOCK *****
       3                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
       4                 :  *
       5                 :  * The contents of this file are subject to the Mozilla Public License Version
       6                 :  * 1.1 (the "License"); you may not use this file except in compliance with
       7                 :  * the License. You may obtain a copy of the License at
       8                 :  * http://www.mozilla.org/MPL/
       9                 :  *
      10                 :  * Software distributed under the License is distributed on an "AS IS" basis,
      11                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
      12                 :  * for the specific language governing rights and limitations under the
      13                 :  * License.
      14                 :  *
      15                 :  * The Original Code is mozilla.org code.
      16                 :  *
      17                 :  * The Initial Developer of the Original Code is
      18                 :  * Netscape Communications Corporation.
      19                 :  * Portions created by the Initial Developer are Copyright (C) 1998
      20                 :  * the Initial Developer. All Rights Reserved.
      21                 :  *
      22                 :  * Contributor(s):
      23                 :  *
      24                 :  * Alternatively, the contents of this file may be used under the terms of
      25                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
      26                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
      27                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
      28                 :  * of those above. If you wish to allow use of your version of this file only
      29                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
      30                 :  * use your version of this file under the terms of the MPL, indicate your
      31                 :  * decision by deleting the provisions above and replace them with the notice
      32                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
      33                 :  * the provisions above, a recipient may use your version of this file under
      34                 :  * the terms of any one of the MPL, the GPL or the LGPL.
      35                 :  *
      36                 :  * ***** END LICENSE BLOCK ***** */
      37                 : 
      38                 : 
      39                 : #include "nsSampleWordBreaker.h"
      40                 : 
      41                 : #include "pratom.h"
      42                 : #include "nsLWBRKDll.h"
      43            1404 : nsSampleWordBreaker::nsSampleWordBreaker()
      44                 : {
      45            1404 : }
      46            2806 : nsSampleWordBreaker::~nsSampleWordBreaker()
      47                 : {
      48            5612 : }
      49                 : 
      50           12635 : NS_IMPL_ISUPPORTS1(nsSampleWordBreaker, nsIWordBreaker)
      51                 : 
      52               0 : bool nsSampleWordBreaker::BreakInBetween(
      53                 :   const PRUnichar* aText1 , PRUint32 aTextLen1,
      54                 :   const PRUnichar* aText2 , PRUint32 aTextLen2)
      55                 : {
      56               0 :   NS_PRECONDITION( nsnull != aText1, "null ptr");
      57               0 :   NS_PRECONDITION( nsnull != aText2, "null ptr");
      58                 : 
      59               0 :   if(!aText1 || !aText2 || (0 == aTextLen1) || (0 == aTextLen2))
      60               0 :     return false;
      61                 : 
      62               0 :   return (this->GetClass(aText1[aTextLen1-1]) != this->GetClass(aText2[0]));
      63                 : }
      64                 : 
      65                 : 
      66                 : #define IS_ASCII(c)            (0 == ( 0xFF80 & (c)))
      67                 : #define ASCII_IS_ALPHA(c)         ((( 'a' <= (c)) && ((c) <= 'z')) || (( 'A' <= (c)) && ((c) <= 'Z')))
      68                 : #define ASCII_IS_DIGIT(c)         (( '0' <= (c)) && ((c) <= '9'))
      69                 : #define ASCII_IS_SPACE(c)         (( ' ' == (c)) || ( '\t' == (c)) || ( '\r' == (c)) || ( '\n' == (c)))
      70                 : #define IS_ALPHABETICAL_SCRIPT(c) ((c) < 0x2E80) 
      71                 : 
      72                 : // we change the beginning of IS_HAN from 0x4e00 to 0x3400 to relfect Unicode 3.0 
      73                 : #define IS_HAN(c)              (( 0x3400 <= (c)) && ((c) <= 0x9fff))||(( 0xf900 <= (c)) && ((c) <= 0xfaff))
      74                 : #define IS_KATAKANA(c)         (( 0x30A0 <= (c)) && ((c) <= 0x30FF))
      75                 : #define IS_HIRAGANA(c)         (( 0x3040 <= (c)) && ((c) <= 0x309F))
      76                 : #define IS_HALFWIDTHKATAKANA(c)         (( 0xFF60 <= (c)) && ((c) <= 0xFF9F))
      77                 : #define IS_THAI(c)         (0x0E00 == (0xFF80 & (c) )) // Look at the higest 9 bits
      78                 : 
      79               0 : PRUint8 nsSampleWordBreaker::GetClass(PRUnichar c)
      80                 : {
      81                 :   // begin of the hack
      82                 : 
      83               0 :   if (IS_ALPHABETICAL_SCRIPT(c))  {
      84               0 :           if(IS_ASCII(c))  {
      85               0 :                   if(ASCII_IS_SPACE(c)) {
      86               0 :                           return kWbClassSpace;
      87               0 :                   } else if(ASCII_IS_ALPHA(c) || ASCII_IS_DIGIT(c)) {
      88               0 :                           return kWbClassAlphaLetter;
      89                 :                   } else {
      90               0 :                           return kWbClassPunct;
      91                 :                   }
      92               0 :           } else if(IS_THAI(c)) {
      93               0 :                   return kWbClassThaiLetter;
      94               0 :           } else if (c == 0x00A0/*NBSP*/) {
      95               0 :       return kWbClassSpace;
      96                 :     } else {
      97               0 :                   return kWbClassAlphaLetter;
      98                 :           }
      99                 :   }  else {
     100               0 :           if(IS_HAN(c)) {
     101               0 :                   return kWbClassHanLetter;
     102               0 :           } else if(IS_KATAKANA(c))   {
     103               0 :                   return kWbClassKatakanaLetter;
     104               0 :           } else if(IS_HIRAGANA(c))   {
     105               0 :                   return kWbClassHiraganaLetter;
     106               0 :           } else if(IS_HALFWIDTHKATAKANA(c))  {
     107               0 :                   return kWbClassHWKatakanaLetter;
     108                 :           } else  {
     109               0 :                   return kWbClassAlphaLetter;
     110                 :           }
     111                 :   }
     112                 :   return 0;
     113                 : }
     114                 : 
     115               0 : nsWordRange nsSampleWordBreaker::FindWord(
     116                 :   const PRUnichar* aText , PRUint32 aTextLen,
     117                 :   PRUint32 aOffset)
     118                 : {
     119                 :   nsWordRange range;
     120               0 :   NS_PRECONDITION( nsnull != aText, "null ptr");
     121               0 :   NS_PRECONDITION( 0 != aTextLen, "len = 0");
     122               0 :   NS_PRECONDITION( aOffset <= aTextLen, "aOffset > aTextLen");
     123                 : 
     124               0 :   range.mBegin = aTextLen + 1;
     125               0 :   range.mEnd = aTextLen + 1;
     126                 : 
     127               0 :   if(!aText || aOffset > aTextLen)
     128               0 :     return range;
     129                 : 
     130               0 :   PRUint8 c = this->GetClass(aText[aOffset]);
     131                 :   PRUint32 i;
     132                 :   // Scan forward
     133               0 :   range.mEnd--;
     134               0 :   for(i = aOffset +1;i <= aTextLen; i++)
     135                 :   {
     136               0 :      if( c != this->GetClass(aText[i]))
     137                 :      {
     138               0 :        range.mEnd = i;
     139               0 :        break;
     140                 :      }
     141                 :   }
     142                 : 
     143                 :   // Scan backward
     144               0 :   range.mBegin = 0;
     145               0 :   for(i = aOffset ;i > 0; i--)
     146                 :   {
     147               0 :      if( c != this->GetClass(aText[i-1]))
     148                 :      {
     149               0 :        range.mBegin = i;
     150               0 :        break;
     151                 :      }
     152                 :   }
     153                 :   if(kWbClassThaiLetter == c)
     154                 :   {
     155                 :         // need to call Thai word breaker from here
     156                 :         // we should pass the whole Thai segment to the thai word breaker to find a shorter answer
     157                 :   }
     158               0 :   return range;
     159                 : }
     160                 : 
     161               0 : PRInt32 nsSampleWordBreaker::NextWord( 
     162                 :   const PRUnichar* aText, PRUint32 aLen, PRUint32 aPos) 
     163                 : {
     164                 :   PRInt8 c1, c2;
     165               0 :   PRUint32 cur = aPos;
     166               0 :   if (cur == aLen)
     167               0 :     return NS_WORDBREAKER_NEED_MORE_TEXT;
     168               0 :   c1 = this->GetClass(aText[cur]);
     169                 :  
     170               0 :   for(cur++; cur <aLen; cur++)
     171                 :   {
     172               0 :      c2 = this->GetClass(aText[cur]);
     173               0 :      if(c2 != c1) 
     174               0 :        break;
     175                 :   }
     176                 :   if(kWbClassThaiLetter == c1)
     177                 :   {
     178                 :         // need to call Thai word breaker from here
     179                 :         // we should pass the whole Thai segment to the thai word breaker to find a shorter answer
     180                 :   }
     181               0 :   if (cur == aLen)
     182               0 :     return NS_WORDBREAKER_NEED_MORE_TEXT;
     183               0 :   return cur;
     184                 : }

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