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105 lines
4.1 KiB
C++
105 lines
4.1 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsILineBreaker_h__
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#define nsILineBreaker_h__
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#include "nsISupports.h"
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#include "nscore.h"
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#define NS_LINEBREAKER_NEED_MORE_TEXT -1
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// {0x4b0b9e04-6ffb-4647-aa5f-2fa2ebd883e8}
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#define NS_ILINEBREAKER_IID \
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{0x4b0b9e04, 0x6ffb, 0x4647, \
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{0xaa, 0x5f, 0x2f, 0xa2, 0xeb, 0xd8, 0x83, 0xe8}}
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class nsILineBreaker : public nsISupports
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{
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public:
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_ILINEBREAKER_IID)
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enum {
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kWordBreak_Normal = 0, // default
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kWordBreak_BreakAll = 1, // break all
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kWordBreak_KeepAll = 2 // always keep
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};
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virtual PRInt32 Next( const PRUnichar* aText, PRUint32 aLen,
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PRUint32 aPos) = 0;
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virtual PRInt32 Prev( const PRUnichar* aText, PRUint32 aLen,
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PRUint32 aPos) = 0;
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// Call this on a word with whitespace at either end. We will apply JISx4501
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// rules to find breaks inside the word. aBreakBefore is set to the break-
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// before status of each character; aBreakBefore[0] will always be false
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// because we never return a break before the first character.
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// aLength is the length of the aText array and also the length of the aBreakBefore
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// output array.
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virtual void GetJISx4051Breaks(const PRUnichar* aText, PRUint32 aLength,
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PRUint8 aWordBreak,
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PRUint8* aBreakBefore) = 0;
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virtual void GetJISx4051Breaks(const PRUint8* aText, PRUint32 aLength,
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PRUint8 aWordBreak,
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PRUint8* aBreakBefore) = 0;
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(nsILineBreaker, NS_ILINEBREAKER_IID)
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static inline bool
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NS_IsSpace(PRUnichar u)
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{
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return u == 0x0020 || // SPACE
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u == 0x0009 || // CHARACTER TABULATION
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u == 0x000D || // CARRIAGE RETURN
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(0x2000 <= u && u <= 0x2006) || // EN QUAD, EM QUAD, EN SPACE,
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// EM SPACE, THREE-PER-EM SPACE,
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// FOUR-PER-SPACE, SIX-PER-EM SPACE,
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(0x2008 <= u && u <= 0x200B) || // PUNCTUATION SPACE, THIN SPACE,
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// HAIR SPACE, ZERO WIDTH SPACE
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u == 0x3000; // IDEOGRAPHIC SPACE
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}
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static inline bool
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NS_NeedsPlatformNativeHandling(PRUnichar aChar)
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{
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return (0x0e01 <= aChar && aChar <= 0x0fff); // Thai, Lao, Tibetan
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}
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#endif /* nsILineBreaker_h__ */
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