gecko/intl/lwbrk/public/nsILineBreaker.h
2009-07-10 18:18:19 +12:00

96 lines
3.9 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (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.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
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* ***** END LICENSE BLOCK ***** */
#ifndef nsILineBreaker_h__
#define nsILineBreaker_h__
#include "nsISupports.h"
#include "nscore.h"
#define NS_LINEBREAKER_NEED_MORE_TEXT -1
// {5ae68851-d9a3-49fd-9388-58586dad8044}
#define NS_ILINEBREAKER_IID \
{ 0x5ae68851, 0xd9a3, 0x49fd, \
{ 0x93, 0x88, 0x58, 0x58, 0x6d, 0xad, 0x80, 0x44 } }
class nsILineBreaker : public nsISupports
{
public:
NS_DECLARE_STATIC_IID_ACCESSOR(NS_ILINEBREAKER_IID)
virtual PRInt32 Next( const PRUnichar* aText, PRUint32 aLen,
PRUint32 aPos) = 0;
virtual PRInt32 Prev( const PRUnichar* aText, PRUint32 aLen,
PRUint32 aPos) = 0;
// Call this on a word with whitespace at either end. We will apply JISx4501
// rules to find breaks inside the word. aBreakBefore is set to the break-
// before status of each character; aBreakBefore[0] will always be false
// because we never return a break before the first character.
// aLength is the length of the aText array and also the length of the aBreakBefore
// output array.
virtual void GetJISx4051Breaks(const PRUnichar* aText, PRUint32 aLength,
PRPackedBool* aBreakBefore) = 0;
virtual void GetJISx4051Breaks(const PRUint8* aText, PRUint32 aLength,
PRPackedBool* aBreakBefore) = 0;
};
NS_DEFINE_STATIC_IID_ACCESSOR(nsILineBreaker, NS_ILINEBREAKER_IID)
static inline PRBool
NS_IsSpace(PRUnichar u)
{
return u == 0x0020 || // SPACE
u == 0x0009 || // CHARACTER TABULATION
u == 0x000D || // CARRIAGE RETURN
(0x2000 <= u && u <= 0x2006) || // EN QUAD, EM QUAD, EN SPACE,
// EM SPACE, THREE-PER-EM SPACE,
// FOUR-PER-SPACE, SIX-PER-EM SPACE,
(0x2008 <= u && u <= 0x200B) || // PUNCTUATION SPACE, THIN SPACE,
// HAIR SPACE, ZERO WIDTH SPACE
u == 0x3000; // IDEOGRAPHIC SPACE
}
static inline PRBool
NS_NeedsPlatformNativeHandling(PRUnichar aChar)
{
return (0x0e01 <= aChar && aChar <= 0x0fff); // Thai, Lao, Tibetan
}
#endif /* nsILineBreaker_h__ */