LCOV - app.info - objdir/toolkit/library/nsBidiUtils.cpp

LCOV - code coverage report
| Current view: | directory - objdir/toolkit/library - nsBidiUtils.cpp (source / functions) |  | Found | Hit | Coverage |
| Test: | app.info | Lines: | 39 | 0 | 0.0 %
| Date: | 2012-04-21 | Functions: | 5 | 0 | 0.0 %

           1                 : /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
           2                 :  *
           3                 :  * ***** BEGIN LICENSE BLOCK *****
           4                 :  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
           5                 :  *
           6                 :  * The contents of this file are subject to the Mozilla Public License Version
           7                 :  * 1.1 (the "License"); you may not use this file except in compliance with
           8                 :  * the License. You may obtain a copy of the License at
           9                 :  * http://www.mozilla.org/MPL/
          10                 :  *
          11                 :  * Software distributed under the License is distributed on an "AS IS" basis,
          12                 :  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
          13                 :  * for the specific language governing rights and limitations under the
          14                 :  * License.
          15                 :  *
          16                 :  * The Original Code is mozilla.org code.
          17                 :  *
          18                 :  * The Initial Developer of the Original Code is
          19                 :  * IBM Corporation.
          20                 :  * Portions created by the Initial Developer are Copyright (C) 2000
          21                 :  * the Initial Developer. All Rights Reserved.
          22                 :  *
          23                 :  * Contributor(s):
          24                 :  *   Maha Abou El Rous <mahar@eg.ibm.com>
          25                 :  *   Lina Kemmel <lkemmel@il.ibm.com>
          26                 :  *   Simon Montagu <smontagu@netscape.com>
          27                 :  *   Roozbeh Pournader <roozbeh@sharif.edu>
          28                 :  *   Ehsan Akhgari <ehsan.akhgari@gmail.com>
          29                 :  *
          30                 :  * Alternatively, the contents of this file may be used under the terms of
          31                 :  * either of the GNU General Public License Version 2 or later (the "GPL"),
          32                 :  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
          33                 :  * in which case the provisions of the GPL or the LGPL are applicable instead
          34                 :  * of those above. If you wish to allow use of your version of this file only
          35                 :  * under the terms of either the GPL or the LGPL, and not to allow others to
          36                 :  * use your version of this file under the terms of the MPL, indicate your
          37                 :  * decision by deleting the provisions above and replace them with the notice
          38                 :  * and other provisions required by the GPL or the LGPL. If you do not delete
          39                 :  * the provisions above, a recipient may use your version of this file under
          40                 :  * the terms of any one of the MPL, the GPL or the LGPL.
          41                 :  *
          42                 :  * ***** END LICENSE BLOCK ***** */
          43                 : #include "nsBidiUtils.h"
          44                 : #include "bidicattable.h"
          45                 : #include "nsCharTraits.h"
          46                 :
          47                 : static nsCharType ebc2ucd[15] = {
          48                 :   eCharType_OtherNeutral, /* Placeholder -- there will never be a 0 index value */
          49                 :   eCharType_LeftToRight,
          50                 :   eCharType_RightToLeft,
          51                 :   eCharType_RightToLeftArabic,
          52                 :   eCharType_ArabicNumber,
          53                 :   eCharType_EuropeanNumber,
          54                 :   eCharType_EuropeanNumberSeparator,
          55                 :   eCharType_EuropeanNumberTerminator,
          56                 :   eCharType_CommonNumberSeparator,
          57                 :   eCharType_OtherNeutral,
          58                 :   eCharType_DirNonSpacingMark,
          59                 :   eCharType_BoundaryNeutral,
          60                 :   eCharType_BlockSeparator,
          61                 :   eCharType_SegmentSeparator,
          62                 :   eCharType_WhiteSpaceNeutral
          63                 : };
          64                 :
          65                 : static nsCharType cc2ucd[5] = {
          66                 :   eCharType_LeftToRightEmbedding,
          67                 :   eCharType_RightToLeftEmbedding,
          68                 :   eCharType_PopDirectionalFormat,
          69                 :   eCharType_LeftToRightOverride,
          70                 :   eCharType_RightToLeftOverride
          71                 : };
          72                 :
          73                 : #define ARABIC_TO_HINDI_DIGIT_INCREMENT (START_HINDI_DIGITS - START_ARABIC_DIGITS)
          74                 : #define PERSIAN_TO_HINDI_DIGIT_INCREMENT (START_HINDI_DIGITS - START_FARSI_DIGITS)
          75                 : #define ARABIC_TO_PERSIAN_DIGIT_INCREMENT (START_FARSI_DIGITS - START_ARABIC_DIGITS)
          76                 : #define NUM_TO_ARABIC(c) \
          77                 :   ((((c)>=START_HINDI_DIGITS) && ((c)<=END_HINDI_DIGITS)) ? \
          78                 :    ((c) - (PRUint16)ARABIC_TO_HINDI_DIGIT_INCREMENT) : \
          79                 :    ((((c)>=START_FARSI_DIGITS) && ((c)<=END_FARSI_DIGITS)) ? \
          80                 :     ((c) - (PRUint16)ARABIC_TO_PERSIAN_DIGIT_INCREMENT) : \
          81                 :      (c)))
          82                 : #define NUM_TO_HINDI(c) \
          83                 :   ((((c)>=START_ARABIC_DIGITS) && ((c)<=END_ARABIC_DIGITS)) ? \
          84                 :    ((c) + (PRUint16)ARABIC_TO_HINDI_DIGIT_INCREMENT): \
          85                 :    ((((c)>=START_FARSI_DIGITS) && ((c)<=END_FARSI_DIGITS)) ? \
          86                 :     ((c) + (PRUint16)PERSIAN_TO_HINDI_DIGIT_INCREMENT) : \
          87                 :      (c)))
          88                 : #define NUM_TO_PERSIAN(c) \
          89                 :   ((((c)>=START_HINDI_DIGITS) && ((c)<=END_HINDI_DIGITS)) ? \
          90                 :    ((c) - (PRUint16)PERSIAN_TO_HINDI_DIGIT_INCREMENT) : \
          91                 :    ((((c)>=START_ARABIC_DIGITS) && ((c)<=END_ARABIC_DIGITS)) ? \
          92                 :     ((c) + (PRUint16)ARABIC_TO_PERSIAN_DIGIT_INCREMENT) : \
          93                 :      (c)))
          94                 :
          95               0 : PRUnichar HandleNumberInChar(PRUnichar aChar, bool aPrevCharArabic, PRUint32 aNumFlag)
          96                 : {
          97                 :   // IBMBIDI_NUMERAL_NOMINAL *
          98                 :   // IBMBIDI_NUMERAL_REGULAR
          99                 :   // IBMBIDI_NUMERAL_HINDICONTEXT
         100                 :   // IBMBIDI_NUMERAL_ARABIC
         101                 :   // IBMBIDI_NUMERAL_HINDI
         102                 :
         103               0 :   switch (aNumFlag) {
         104                 :     case IBMBIDI_NUMERAL_HINDI:
         105               0 :       return NUM_TO_HINDI(aChar);
         106                 :     case IBMBIDI_NUMERAL_ARABIC:
         107               0 :       return NUM_TO_ARABIC(aChar);
         108                 :     case IBMBIDI_NUMERAL_PERSIAN:
         109               0 :       return NUM_TO_PERSIAN(aChar);
         110                 :     case IBMBIDI_NUMERAL_REGULAR:
         111                 :     case IBMBIDI_NUMERAL_HINDICONTEXT:
         112                 :     case IBMBIDI_NUMERAL_PERSIANCONTEXT:
         113                 :       // for clipboard handling
         114                 :       //XXX do we really want to convert numerals when copying text?
         115               0 :       if (aPrevCharArabic) {
         116               0 :         if (aNumFlag == IBMBIDI_NUMERAL_PERSIANCONTEXT)
         117               0 :           return NUM_TO_PERSIAN(aChar);
         118                 :         else
         119               0 :           return NUM_TO_HINDI(aChar);
         120                 :       }
         121                 :       else
         122               0 :         return NUM_TO_ARABIC(aChar);
         123                 :     case IBMBIDI_NUMERAL_NOMINAL:
         124                 :     default:
         125               0 :       return aChar;
         126                 :   }
         127                 : }
         128                 :
         129               0 : nsresult HandleNumbers(PRUnichar* aBuffer, PRUint32 aSize, PRUint32 aNumFlag)
         130                 : {
         131                 :   PRUint32 i;
         132                 :
         133               0 :   switch (aNumFlag) {
         134                 :     case IBMBIDI_NUMERAL_HINDI:
         135                 :     case IBMBIDI_NUMERAL_ARABIC:
         136                 :     case IBMBIDI_NUMERAL_PERSIAN:
         137                 :     case IBMBIDI_NUMERAL_REGULAR:
         138                 :     case IBMBIDI_NUMERAL_HINDICONTEXT:
         139                 :     case IBMBIDI_NUMERAL_PERSIANCONTEXT:
         140               0 :       for (i=0;i<aSize;i++)
         141               0 :         aBuffer[i] = HandleNumberInChar(aBuffer[i], !!(i>0 ? aBuffer[i-1] : 0), aNumFlag);
         142               0 :       break;
         143                 :     case IBMBIDI_NUMERAL_NOMINAL:
         144                 :     default:
         145               0 :       break;
         146                 :   }
         147               0 :   return NS_OK;
         148                 : }
         149                 :
         150                 : #define LRM_CHAR 0x200e
         151               0 : bool IsBidiControl(PRUint32 aChar)
         152                 : {
         153                 :   // This method is used when stripping Bidi control characters for
         154                 :   // display, so it will return TRUE for LRM and RLM as
         155                 :   // well as the characters with category eBidiCat_CC
         156               0 :   return (eBidiCat_CC == GetBidiCat(aChar) || ((aChar)&0xfffffe)==LRM_CHAR);
         157                 : }
         158                 :
         159               0 : bool HasRTLChars(const nsAString& aString)
         160                 : {
         161                 : // This is used to determine whether to enable bidi if a string has
         162                 : // right-to-left characters. To simplify things, anything that could be a
         163                 : // surrogate or RTL presentation form is covered just by testing >= 0xD800).
         164                 : // It's fine to enable bidi in rare cases where it actually isn't needed.
         165               0 :   PRInt32 length = aString.Length();
         166               0 :   for (PRInt32 i = 0; i < length; i++) {
         167               0 :     PRUnichar ch = aString.CharAt(i);
         168               0 :     if (ch >= 0xD800 || IS_IN_BMP_RTL_BLOCK(ch)) {
         169               0 :       return true;
         170                 :     }
         171                 :   }
         172               0 :   return false;
         173                 : }
         174                 :
         175               0 : nsCharType GetCharType(PRUint32 aChar)
         176                 : {
         177                 :   nsCharType oResult;
         178               0 :   eBidiCategory bCat = GetBidiCat(aChar);
         179               0 :   if (eBidiCat_CC != bCat) {
         180               0 :     NS_ASSERTION((PRUint32) bCat < (sizeof(ebc2ucd)/sizeof(nsCharType)), "size mismatch");
         181               0 :     if((PRUint32) bCat < (sizeof(ebc2ucd)/sizeof(nsCharType)))
         182               0 :       oResult = ebc2ucd[bCat];
         183                 :     else
         184               0 :       oResult = ebc2ucd[0]; // something is very wrong, but we need to return a value
         185                 :   } else {
         186               0 :     NS_ASSERTION((aChar-0x202a) < (sizeof(cc2ucd)/sizeof(nsCharType)), "size mismatch");
         187               0 :     if((aChar-0x202a) < (sizeof(cc2ucd)/sizeof(nsCharType)))
         188               0 :       oResult = cc2ucd[aChar - 0x202a];
         189                 :     else
         190               0 :       oResult = ebc2ucd[0]; // something is very wrong, but we need to return a value
         191                 :   }
         192               0 :   return oResult;
         193                 : }

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