intl/lwbrk/src/nsCarbonBreaker.cpp

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   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
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  15  * The Original Code is mozilla.org code.
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  17  * The Initial Developer of the Original Code is
  18  * Vee Satayamas <vsatayamas@gmail.com>
  19  * Portions created by the Initial Developer are Copyright (C) 2007
  20  * the Initial Developer. All Rights Reserved.
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  22  * Contributor(s):
  23  * - Vee Satayamas <vsatayamas@gmail.com>
  24  * - Patipat Susumpow <kengggg@gmail.com>
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  26  * Alternatively, the contents of this file may be used under the terms of
  27  * either of the GNU General Public License Version 2 or later (the "GPL"),
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  38  * ***** END LICENSE BLOCK ***** */
  39
  40 #include "nsComplexBreaker.h"
  41 #include <Carbon/Carbon.h>
  42
  43 void
  44 NS_GetComplexLineBreaks(const PRUnichar* aText, PRUint32 aLength,
  45                         PRPackedBool* aBreakBefore)
  46 {
  47   NS_ASSERTION(aText, "aText shouldn't be null");
  48   TextBreakLocatorRef breakLocator;
  49
  50   memset(aBreakBefore, PR_FALSE, aLength * sizeof(PRPackedBool));
  51
  52   OSStatus status = UCCreateTextBreakLocator(NULL, 0, kUCTextBreakLineMask, &breakLocator);
  53
  54   if (status != noErr)
  55     return;
  56
  57   for (UniCharArrayOffset position = 0; position < aLength;) {
  58     UniCharArrayOffset offset;
  59     status = UCFindTextBreak(breakLocator,
  60                   kUCTextBreakLineMask,
  61                   position == 0 ? kUCTextBreakLeadingEdgeMask :
  62                                   (kUCTextBreakLeadingEdgeMask |
  63                                    kUCTextBreakIterateMask),
  64                   aText,
  65                   aLength,
  66                   position,
  67                   &offset);
  68     if (status != noErr)
  69       break;
  70     aBreakBefore[offset] = PR_TRUE;
  71     position = offset;
  72   }
  73   UCDisposeTextBreakLocator(&breakLocator);
  74 }