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288 lines
13 KiB
C
288 lines
13 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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* Ehsan Akhgari <ehsan.akhgari@gmail.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 "nsStringGlue.h"
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/**
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* Read ftp://ftp.unicode.org/Public/UNIDATA/ReadMe-Latest.txt
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* section BIDIRECTIONAL PROPERTIES
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* for the detailed definition of the following categories
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*
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* The values here must match the equivalents in %map in
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* mozilla/intl/unicharutil/tools/genbidicattable.pl
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*/
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typedef enum {
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eBidiCat_Undefined,
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eBidiCat_L, /* Left-to-Right */
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eBidiCat_R, /* Right-to-Left */
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eBidiCat_AL, /* Right-to-Left Arabic */
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eBidiCat_AN, /* Arabic Number */
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eBidiCat_EN, /* European Number */
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eBidiCat_ES, /* European Number Separator */
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eBidiCat_ET, /* European Number Terminator */
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eBidiCat_CS, /* Common Number Separator */
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eBidiCat_ON, /* Other Neutrals */
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eBidiCat_NSM, /* Non-Spacing Mark */
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eBidiCat_BN, /* Boundary Neutral */
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eBidiCat_B, /* Paragraph Separator */
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eBidiCat_S, /* Segment Separator */
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eBidiCat_WS, /* Whitespace */
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eBidiCat_CC = 0xf, /* Control Code */
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/* (internal use only - will never be outputed) */
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eBidiCat_LRE = 0x2a, /* Left-to-Right Embedding */
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eBidiCat_RLE = 0x2b, /* Right-to-Left Embedding */
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eBidiCat_PDF = 0x2c, /* Pop Directional Formatting */
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eBidiCat_LRO = 0x2d, /* Left-to-Right Override */
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eBidiCat_RLO = 0x2e /* Right-to-Left Override */
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} eBidiCategory;
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enum nsCharType {
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eCharType_LeftToRight = 0,
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eCharType_RightToLeft = 1,
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eCharType_EuropeanNumber = 2,
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eCharType_EuropeanNumberSeparator = 3,
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eCharType_EuropeanNumberTerminator = 4,
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eCharType_ArabicNumber = 5,
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eCharType_CommonNumberSeparator = 6,
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eCharType_BlockSeparator = 7,
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eCharType_SegmentSeparator = 8,
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eCharType_WhiteSpaceNeutral = 9,
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eCharType_OtherNeutral = 10,
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eCharType_LeftToRightEmbedding = 11,
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eCharType_LeftToRightOverride = 12,
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eCharType_RightToLeftArabic = 13,
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eCharType_RightToLeftEmbedding = 14,
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eCharType_RightToLeftOverride = 15,
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eCharType_PopDirectionalFormat = 16,
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eCharType_DirNonSpacingMark = 17,
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eCharType_BoundaryNeutral = 18,
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eCharType_CharTypeCount
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};
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/**
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* This specifies the language directional property of a character set.
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*/
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typedef enum nsCharType nsCharType;
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/**
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* definitions of bidirection character types by category
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*/
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#define CHARTYPE_IS_RTL(val) ( ( (val) == eCharType_RightToLeft) || ( (val) == eCharType_RightToLeftArabic) )
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#define CHARTYPE_IS_WEAK(val) ( ( (val) == eCharType_EuropeanNumberSeparator) \
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|| ( (val) == eCharType_EuropeanNumberTerminator) \
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|| ( ( (val) > eCharType_ArabicNumber) && ( (val) != eCharType_RightToLeftArabic) ) )
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/**
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* Inspects a Unichar, converting numbers to Arabic or Hindi forms and returning them
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* @param aChar is the character
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* @param aPrevCharArabic is true if the previous character in the string is an Arabic char
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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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* @return the converted Unichar
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*/
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PRUnichar HandleNumberInChar(PRUnichar aChar, bool aPrevCharArabic, PRUint32 aNumFlag);
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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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* Give a UTF-32 codepoint, return a nsCharType (compatible with ICU)
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*/
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nsCharType GetCharType(PRUint32 aChar);
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/**
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* Give a UTF-32 codepoint
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* return true if the codepoint is a Bidi control character (LRE, RLE, PDF, LRO, RLO, LRM, RLM)
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* return false, otherwise
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*/
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bool IsBidiControl(PRUint32 aChar);
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/**
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* Give an nsString.
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* @return true if the string contains right-to-left characters
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*/
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bool HasRTLChars(const nsAString& aString);
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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_NUMERAL_STR "bidi.numeral"
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#define IBMBIDI_SUPPORTMODE_STR "bidi.support"
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#define IBMBIDI_TEXTDIRECTION 1
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#define IBMBIDI_TEXTTYPE 2
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#define IBMBIDI_NUMERAL 4
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#define IBMBIDI_SUPPORTMODE 5
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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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// 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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#define IBMBIDI_NUMERAL_PERSIANCONTEXT 5 // 5 = persiancontextnumeralBidi
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#define IBMBIDI_NUMERAL_PERSIAN 6 // 6 = persiannumeralBidi
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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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#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_NUMERAL_NOMINAL<<8) | \
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(IBMBIDI_SUPPORTMODE_MOZILLA<<12))
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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_NUMERAL(bo) (((bo)>>8) & 0x0000000F) /* 4 bits for NUMERAL */
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#define GET_BIDI_OPTION_SUPPORT(bo) (((bo)>>12) & 0x0000000F) /* 4 bits for SUPPORT */
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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_NUMERAL(bo, num) {(bo)=((bo) & 0xFFFFF0FF)|(((num)& 0x0000000F)<<8);}
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#define SET_BIDI_OPTION_SUPPORT(bo, sup) {(bo)=((bo) & 0xFFFF0FFF)|(((sup)& 0x0000000F)<<12);}
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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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/**
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* Arabic numeric separator and numeric formatting characters:
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* U+0600;ARABIC NUMBER SIGN
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* U+0601;ARABIC SIGN SANAH
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* U+0602;ARABIC FOOTNOTE MARKER
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* U+0603;ARABIC SIGN SAFHA
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* U+066A;ARABIC PERCENT SIGN
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* U+066B;ARABIC DECIMAL SEPARATOR
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* U+066C;ARABIC THOUSANDS SEPARATOR
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* U+06DD;ARABIC END OF AYAH
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*/
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#define IS_ARABIC_SEPARATOR(u) ( ( (u) == 0x0600 ) || ( (u) == 0x0601 ) || ( (u) == 0x0602 ) || ( (u) == 0x0603 ) || ( (u) == 0x066A ) || ( (u) == 0x066B ) || ( (u) == 0x066C ) || ( (u) == 0x06DD ) )
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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_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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