зеркало из https://github.com/mozilla/gecko-dev.git
246 строки
11 KiB
C
246 строки
11 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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* IBM Corporation.
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* Portions created by the Initial Developer are Copyright (C) 2000
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Maha Abou El Rous <mahar@eg.ibm.com>
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* Lina Kemmel <lkemmel@il.ibm.com>
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* Simon Montagu <smontagu@netscape.com>
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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 nsBidiUtils_h__
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#define nsBidiUtils_h__
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#include "nsCOMPtr.h"
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#include "nsString.h"
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/**
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* Perform Arabic shaping on a Unichar string
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* @param aString is the input string
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* @param aLen is the length of aStrong
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* @param aBuf receives the shaped output
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* @param aBuflen receives the length of aBuf
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* @param aInputLogical indicates that the input is in logical order
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* @param aOutputLogical indicates that the output should be in logical order
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*/
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nsresult ArabicShaping(const PRUnichar* aString, PRUint32 aLen,
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PRUnichar* aBuf, PRUint32* aBufLen,
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PRBool aInputLogical, PRBool aOutputLogical);
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/**
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* Scan an nsString, converting characters in the FExx range (Arabic presentation forms) to the equivalent characters in the 06xx
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* range
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* @param aSrc is the input string
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* @param aDst is the output string
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*/
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nsresult Conv_FE_06(const nsString& aSrc, nsString& aDst);
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/**
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* Scan an nsString, converting characters in the FExx range (Arabic presentation forms) to the equivalent characters in the 06xx
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* range, and also reverse the string
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* @param aSrc is the input string
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* @param aDst is the output string
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*/
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nsresult Conv_FE_06_WithReverse(const nsString& aSrc, nsString& aDst);
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/**
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* Scan an nsString, converting characters in the 06xx range to the equivalent characters in the 0Fxx range (Arabic presentation
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* forms), with the option to reverse the string
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* @param aSrc is the input string
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* @param aDst is the output string
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* @param aDir indicates whether the string should be reversed
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* IBMBIDI_TEXTDIRECTION_LTR: do not reverse the string
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* IBMBIDI_TEXTDIRECTION_RTL: reverse the string
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*/
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nsresult Conv_06_FE_WithReverse(const nsString& aSrc, nsString& aDst, PRUint32 aDir);
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/**
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* Scan a Unichar string, converting numbers to Arabic or Hindi forms in place
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* @param aBuffer is the string
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* @param aSize is the size of aBuffer
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* @param aNumFlag specifies the conversion to perform:
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* IBMBIDI_NUMERAL_NOMINAL: don't do any conversion
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* IBMBIDI_NUMERAL_HINDI: convert to Hindi forms (Unicode 0660-0669)
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* IBMBIDI_NUMERAL_ARABIC: convert to Arabic forms (Unicode 0030-0039)
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* IBMBIDI_NUMERAL_HINDICONTEXT: convert numbers in Arabic text to Hindi, otherwise to Arabic
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*/
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nsresult HandleNumbers(PRUnichar* aBuffer, PRUint32 aSize, PRUint32 aNumFlag);
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/**
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* Scan an nsString, converting numerals to Arabic or Hindi forms
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* @param aSrc is the input string
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* @param aDst is the output string
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*/
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nsresult HandleNumbers(const nsString& aSrc, nsString& aDst);
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// --------------------------------------------------
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// IBMBIDI
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// --------------------------------------------------
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//
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// These values are shared with Preferences dialog
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// ------------------
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// If Pref values are to be changed
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// in the XUL file of Prefs. the values
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// Must be changed here too..
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// ------------------
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//
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#define IBMBIDI_TEXTDIRECTION_STR "bidi.direction"
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#define IBMBIDI_TEXTTYPE_STR "bidi.texttype"
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#define IBMBIDI_CONTROLSTEXTMODE_STR "bidi.controlstextmode"
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#define IBMBIDI_NUMERAL_STR "bidi.numeral"
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#define IBMBIDI_SUPPORTMODE_STR "bidi.support"
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#define IBMBIDI_CHARSET_STR "bidi.characterset"
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#define IBMBIDI_TEXTDIRECTION 1
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#define IBMBIDI_TEXTTYPE 2
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#define IBMBIDI_CONTROLSTEXTMODE 3
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#define IBMBIDI_NUMERAL 4
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#define IBMBIDI_SUPPORTMODE 5
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#define IBMBIDI_CHARSET 6
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// ------------------
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// Text Direction
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// ------------------
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// bidi.direction
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#define IBMBIDI_TEXTDIRECTION_LTR 1 // 1 = directionLTRBidi *
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#define IBMBIDI_TEXTDIRECTION_RTL 2 // 2 = directionRTLBidi
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// ------------------
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// Text Type
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// ------------------
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// bidi.texttype
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#define IBMBIDI_TEXTTYPE_CHARSET 1 // 1 = charsettexttypeBidi *
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#define IBMBIDI_TEXTTYPE_LOGICAL 2 // 2 = logicaltexttypeBidi
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#define IBMBIDI_TEXTTYPE_VISUAL 3 // 3 = visualtexttypeBidi
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// ------------------
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// Controls Text Mode
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// ------------------
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// bidi.controlstextmode
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#define IBMBIDI_CONTROLSTEXTMODE_LOGICAL 1 // 1 = logicalcontrolstextmodeBidiCmd *
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#define IBMBIDI_CONTROLSTEXTMODE_VISUAL 2 // 2 = visualcontrolstextmodeBidi
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#define IBMBIDI_CONTROLSTEXTMODE_CONTAINER 3 // 3 = containercontrolstextmodeBidi
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// ------------------
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// Numeral Style
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// ------------------
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// bidi.numeral
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#define IBMBIDI_NUMERAL_NOMINAL 0 // 0 = nominalnumeralBidi *
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#define IBMBIDI_NUMERAL_REGULAR 1 // 1 = regularcontextnumeralBidi
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#define IBMBIDI_NUMERAL_HINDICONTEXT 2 // 2 = hindicontextnumeralBidi
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#define IBMBIDI_NUMERAL_ARABIC 3 // 3 = arabicnumeralBidi
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#define IBMBIDI_NUMERAL_HINDI 4 // 4 = hindinumeralBidi
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// ------------------
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// Support Mode
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// ------------------
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// bidi.support
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#define IBMBIDI_SUPPORTMODE_MOZILLA 1 // 1 = mozillaBidisupport *
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#define IBMBIDI_SUPPORTMODE_OSBIDI 2 // 2 = OsBidisupport
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#define IBMBIDI_SUPPORTMODE_DISABLE 3 // 3 = disableBidisupport
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// ------------------
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// Charset Mode
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// ------------------
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// bidi.characterset
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#define IBMBIDI_CHARSET_BIDI 1 // 1 = doccharactersetBidi *
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#define IBMBIDI_CHARSET_DEFAULT 2 // 2 = defaultcharactersetBidi
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#define IBMBIDI_DEFAULT_BIDI_OPTIONS \
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((IBMBIDI_TEXTDIRECTION_LTR<<0) | \
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(IBMBIDI_TEXTTYPE_CHARSET<<4) | \
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(IBMBIDI_CONTROLSTEXTMODE_LOGICAL<<8) | \
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(IBMBIDI_NUMERAL_NOMINAL<<12) | \
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(IBMBIDI_SUPPORTMODE_MOZILLA<<16) | \
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(IBMBIDI_CHARSET_BIDI<<20))
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#define GET_BIDI_OPTION_DIRECTION(bo) (((bo)>>0) & 0x0000000F) /* 4 bits for DIRECTION */
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#define GET_BIDI_OPTION_TEXTTYPE(bo) (((bo)>>4) & 0x0000000F) /* 4 bits for TEXTTYPE */
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#define GET_BIDI_OPTION_CONTROLSTEXTMODE(bo) (((bo)>>8) & 0x0000000F) /* 4 bits for CONTROLTEXTMODE */
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#define GET_BIDI_OPTION_NUMERAL(bo) (((bo)>>12) & 0x0000000F) /* 4 bits for NUMERAL */
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#define GET_BIDI_OPTION_SUPPORT(bo) (((bo)>>16) & 0x0000000F) /* 4 bits for SUPPORT */
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#define GET_BIDI_OPTION_CHARACTERSET(bo) (((bo)>>20) & 0x0000000F) /* 4 bits for CHARACTERSET */
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#define SET_BIDI_OPTION_DIRECTION(bo, dir) {(bo)=((bo) & 0xFFFFFFF0)|(((dir)& 0x0000000F)<<0);}
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#define SET_BIDI_OPTION_TEXTTYPE(bo, tt) {(bo)=((bo) & 0xFFFFFF0F)|(((tt)& 0x0000000F)<<4);}
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#define SET_BIDI_OPTION_CONTROLSTEXTMODE(bo, cotm) {(bo)=((bo) & 0xFFFFF0FF)|(((cotm)& 0x0000000F)<<8);}
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#define SET_BIDI_OPTION_NUMERAL(bo, num) {(bo)=((bo) & 0xFFFF0FFF)|(((num)& 0x0000000F)<<12);}
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#define SET_BIDI_OPTION_SUPPORT(bo, sup) {(bo)=((bo) & 0xFFF0FFFF)|(((sup)& 0x0000000F)<<16);}
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#define SET_BIDI_OPTION_CHARACTERSET(bo, cs) {(bo)=((bo) & 0xFF0FFFFF)|(((cs)& 0x0000000F)<<20);}
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/* Constants related to the position of numerics in the codepage */
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#define START_HINDI_DIGITS 0x0660
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#define END_HINDI_DIGITS 0x0669
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#define START_ARABIC_DIGITS 0x0030
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#define END_ARABIC_DIGITS 0x0039
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#define START_FARSI_DIGITS 0x06f0
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#define END_FARSI_DIGITS 0x06f9
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#define IS_HINDI_DIGIT(u) ( ( (u) >= START_HINDI_DIGITS ) && ( (u) <= END_HINDI_DIGITS ) )
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#define IS_ARABIC_DIGIT(u) ( ( (u) >= START_ARABIC_DIGITS ) && ( (u) <= END_ARABIC_DIGITS ) )
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#define IS_FARSI_DIGIT(u) ( ( (u) >= START_FARSI_DIGITS ) && ( (u) <= END_FARSI_DIGITS ) )
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#define IS_ARABIC_SEPARATOR(u) ( ( (u) == 0x066A ) || ( (u) == 0x066B ) || ( (u) == 0x066C ) )
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#define IS_BIDI_DIACRITIC(u) ( \
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( (u) >= 0x0591 && (u) <= 0x05A1) || ( (u) >= 0x05A3 && (u) <= 0x05B9) \
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|| ( (u) >= 0x05BB && (u) <= 0x05BD) || ( (u) == 0x05BF) || ( (u) == 0x05C1) \
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|| ( (u) == 0x05C2) || ( (u) == 0x05C4) \
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|| ( (u) >= 0x064B && (u) <= 0x0652) || ( (u) == 0x0670) \
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|| ( (u) >= 0x06D7 && (u) <= 0x06E4) || ( (u) == 0x06E7) || ( (u) == 0x06E8) \
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|| ( (u) >= 0x06EA && (u) <= 0x06ED) )
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#define IS_HEBREW_CHAR(c) (((0x0590 <= (c)) && ((c)<= 0x05FF)) || (((c) >= 0xfb1d) && ((c) <= 0xfb4f)))
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#define IS_06_CHAR(c) ((0x0600 <= (c)) && ((c)<= 0x06FF))
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#define IS_FE_CHAR(c) (((0xfb50 <= (c)) && ((c)<= 0xfbFF)) \
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|| ((0xfe70 <= (c)) && ((c)<= 0xfeFC)))
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#define IS_ARABIC_CHAR(c) ((0x0600 <= (c)) && ((c)<= 0x06FF))
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#define IS_ARABIC_ALPHABETIC(c) (IS_ARABIC_CHAR(c) && \
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!(IS_HINDI_DIGIT(c) || IS_FARSI_DIGIT(c) || IS_ARABIC_SEPARATOR(c)))
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#define IS_BIDI_CONTROL_CHAR(c) ((0x202a <= (c)) && ((c)<= 0x202e) \
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|| ((c) == 0x200e) || ((c) == 0x200f))
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/**
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* The codepoint ranges in the following macros are based on the blocks
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* allocated, or planned to be allocated, to right-to-left characters in the
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* BMP (Basic Multilingual Plane) and SMP (Supplementary Multilingual Plane)
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* according to
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* http://unicode.org/Public/UNIDATA/extracted/DerivedBidiClass.txt and
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* http://www.unicode.org/roadmaps/
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*/
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#define IS_IN_BMP_RTL_BLOCK(c) ((0x590 <= (c)) && ((c) <= 0x8ff))
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#define IS_RTL_PRESENTATION_FORM(c) (((0xfb1d <= (c)) && ((c) <= 0xfdff)) || \
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((0xfe70 <= (c)) && ((c) <= 0xfefc)))
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#define IS_IN_SMP_RTL_BLOCK(c) ((0x10800 <= (c)) && ((c) <= 0x10fff))
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#define UCS2_CHAR_IS_BIDI(c) ((IS_IN_BMP_RTL_BLOCK(c)) || \
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(IS_RTL_PRESENTATION_FORM(c)))
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#define UTF32_CHAR_IS_BIDI(c) ((IS_IN_BMP_RTL_BLOCK(c)) || \
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(IS_RTL_PRESENTATION_FORM(c)) || \
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(IS_IN_SMP_RTL_BLOCK(c)))
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#endif /* nsBidiUtils_h__ */
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