mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-29 07:42:04 +00:00
462 lines
15 KiB
C++
462 lines
15 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
|
|
/* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#include "nsUnicodeRange.h"
|
|
#include "nsGkAtoms.h"
|
|
|
|
// This table depends on unicode range definitions.
|
|
// Each item's index must correspond unicode range value
|
|
// eg. x-cyrillic = LangGroupTable[kRangeCyrillic]
|
|
static nsIAtom **gUnicodeRangeToLangGroupAtomTable[] =
|
|
{
|
|
&nsGkAtoms::x_cyrillic,
|
|
&nsGkAtoms::el_,
|
|
&nsGkAtoms::he,
|
|
&nsGkAtoms::ar,
|
|
&nsGkAtoms::th,
|
|
&nsGkAtoms::ko,
|
|
&nsGkAtoms::Japanese,
|
|
&nsGkAtoms::zh_cn,
|
|
&nsGkAtoms::zh_tw,
|
|
&nsGkAtoms::x_devanagari,
|
|
&nsGkAtoms::x_tamil,
|
|
&nsGkAtoms::x_armn,
|
|
&nsGkAtoms::x_beng,
|
|
&nsGkAtoms::x_cans,
|
|
&nsGkAtoms::x_ethi,
|
|
&nsGkAtoms::x_geor,
|
|
&nsGkAtoms::x_gujr,
|
|
&nsGkAtoms::x_guru,
|
|
&nsGkAtoms::x_khmr,
|
|
&nsGkAtoms::x_mlym,
|
|
&nsGkAtoms::x_orya,
|
|
&nsGkAtoms::x_telu,
|
|
&nsGkAtoms::x_knda,
|
|
&nsGkAtoms::x_sinh,
|
|
&nsGkAtoms::x_tibt
|
|
};
|
|
|
|
/**********************************************************************
|
|
* Unicode subranges as defined in unicode 3.0
|
|
* x-western -> latin
|
|
* 0000 - 036f
|
|
* 1e00 - 1eff
|
|
* 2000 - 206f (general punctuation)
|
|
* 20a0 - 20cf (currency symbols)
|
|
* 2100 - 214f (letterlike symbols)
|
|
* 2150 - 218f (Number Forms)
|
|
* el -> greek
|
|
* 0370 - 03ff
|
|
* 1f00 - 1fff
|
|
* x-cyrillic -> cyrillic
|
|
* 0400 - 04ff
|
|
* he -> hebrew
|
|
* 0590 - 05ff
|
|
* ar -> arabic
|
|
* 0600 - 06ff
|
|
* fb50 - fdff (arabic presentation forms)
|
|
* fe70 - feff (arabic presentation forms b)
|
|
* th - thai
|
|
* 0e00 - 0e7f
|
|
* ko -> korean
|
|
* ac00 - d7af (hangul Syllables)
|
|
* 1100 - 11ff (jamo)
|
|
* 3130 - 318f (hangul compatibility jamo)
|
|
* ja
|
|
* 3040 - 309f (hiragana)
|
|
* 30a0 - 30ff (katakana)
|
|
* zh-CN
|
|
* zh-TW
|
|
*
|
|
* CJK
|
|
* 3100 - 312f (bopomofo)
|
|
* 31a0 - 31bf (bopomofo extended)
|
|
* 3000 - 303f (CJK Symbols and Punctuation)
|
|
* 2e80 - 2eff (CJK radicals supplement)
|
|
* 2f00 - 2fdf (Kangxi Radicals)
|
|
* 2ff0 - 2fff (Ideographic Description Characters)
|
|
* 3190 - 319f (kanbun)
|
|
* 3200 - 32ff (Enclosed CJK letters and Months)
|
|
* 3300 - 33ff (CJK compatibility)
|
|
* 3400 - 4dbf (CJK Unified Ideographs Extension A)
|
|
* 4e00 - 9faf (CJK Unified Ideographs)
|
|
* f900 - fa5f (CJK Compatibility Ideographs)
|
|
* fe30 - fe4f (CJK compatibility Forms)
|
|
* ff00 - ffef (halfwidth and fullwidth forms)
|
|
*
|
|
* Armenian
|
|
* 0530 - 058f
|
|
* Sriac
|
|
* 0700 - 074f
|
|
* Thaana
|
|
* 0780 - 07bf
|
|
* Devanagari
|
|
* 0900 - 097f
|
|
* Bengali
|
|
* 0980 - 09ff
|
|
* Gurmukhi
|
|
* 0a00 - 0a7f
|
|
* Gujarati
|
|
* 0a80 - 0aff
|
|
* Oriya
|
|
* 0b00 - 0b7f
|
|
* Tamil
|
|
* 0b80 - 0bff
|
|
* Telugu
|
|
* 0c00 - 0c7f
|
|
* Kannada
|
|
* 0c80 - 0cff
|
|
* Malayalam
|
|
* 0d00 - 0d7f
|
|
* Sinhala
|
|
* 0d80 - 0def
|
|
* Lao
|
|
* 0e80 - 0eff
|
|
* Tibetan
|
|
* 0f00 - 0fbf
|
|
* Myanmar
|
|
* 1000 - 109f
|
|
* Georgian
|
|
* 10a0 - 10ff
|
|
* Ethiopic
|
|
* 1200 - 137f
|
|
* Cherokee
|
|
* 13a0 - 13ff
|
|
* Canadian Aboriginal Syllabics
|
|
* 1400 - 167f
|
|
* Ogham
|
|
* 1680 - 169f
|
|
* Runic
|
|
* 16a0 - 16ff
|
|
* Khmer
|
|
* 1780 - 17ff
|
|
* Mongolian
|
|
* 1800 - 18af
|
|
* Misc - superscripts and subscripts
|
|
* 2070 - 209f
|
|
* Misc - Combining Diacritical Marks for Symbols
|
|
* 20d0 - 20ff
|
|
* Misc - Arrows
|
|
* 2190 - 21ff
|
|
* Misc - Mathematical Operators
|
|
* 2200 - 22ff
|
|
* Misc - Miscellaneous Technical
|
|
* 2300 - 23ff
|
|
* Misc - Control picture
|
|
* 2400 - 243f
|
|
* Misc - Optical character recognition
|
|
* 2440 - 2450
|
|
* Misc - Enclose Alphanumerics
|
|
* 2460 - 24ff
|
|
* Misc - Box Drawing
|
|
* 2500 - 257f
|
|
* Misc - Block Elements
|
|
* 2580 - 259f
|
|
* Misc - Geometric Shapes
|
|
* 25a0 - 25ff
|
|
* Misc - Miscellaneous Symbols
|
|
* 2600 - 267f
|
|
* Misc - Dingbats
|
|
* 2700 - 27bf
|
|
* Misc - Braille Patterns
|
|
* 2800 - 28ff
|
|
* Yi Syllables
|
|
* a000 - a48f
|
|
* Yi radicals
|
|
* a490 - a4cf
|
|
* Alphabetic Presentation Forms
|
|
* fb00 - fb4f
|
|
* Misc - Combining half Marks
|
|
* fe20 - fe2f
|
|
* Misc - small form variants
|
|
* fe50 - fe6f
|
|
* Misc - Specials
|
|
* fff0 - ffff
|
|
*********************************************************************/
|
|
|
|
|
|
|
|
#define NUM_OF_SUBTABLES 10
|
|
#define SUBTABLE_SIZE 16
|
|
|
|
static const uint8_t gUnicodeSubrangeTable[NUM_OF_SUBTABLES][SUBTABLE_SIZE] =
|
|
{
|
|
{ // table for X---
|
|
kRangeTableBase+1, //u0xxx
|
|
kRangeTableBase+2, //u1xxx
|
|
kRangeTableBase+3, //u2xxx
|
|
kRangeSetCJK, //u3xxx
|
|
kRangeSetCJK, //u4xxx
|
|
kRangeSetCJK, //u5xxx
|
|
kRangeSetCJK, //u6xxx
|
|
kRangeSetCJK, //u7xxx
|
|
kRangeSetCJK, //u8xxx
|
|
kRangeSetCJK, //u9xxx
|
|
kRangeTableBase+4, //uaxxx
|
|
kRangeKorean, //ubxxx
|
|
kRangeKorean, //ucxxx
|
|
kRangeTableBase+5, //udxxx
|
|
kRangePrivate, //uexxx
|
|
kRangeTableBase+6 //ufxxx
|
|
},
|
|
{ //table for 0X--
|
|
kRangeSetLatin, //u00xx
|
|
kRangeSetLatin, //u01xx
|
|
kRangeSetLatin, //u02xx
|
|
kRangeGreek, //u03xx XXX 0300-036f is in fact kRangeCombiningDiacriticalMarks
|
|
kRangeCyrillic, //u04xx
|
|
kRangeTableBase+7, //u05xx, includes Cyrillic supplement, Hebrew, and Armenian
|
|
kRangeArabic, //u06xx
|
|
kRangeTertiaryTable, //u07xx
|
|
kRangeUnassigned, //u08xx
|
|
kRangeTertiaryTable, //u09xx
|
|
kRangeTertiaryTable, //u0axx
|
|
kRangeTertiaryTable, //u0bxx
|
|
kRangeTertiaryTable, //u0cxx
|
|
kRangeTertiaryTable, //u0dxx
|
|
kRangeTertiaryTable, //u0exx
|
|
kRangeTibetan //u0fxx
|
|
},
|
|
{ //table for 1x--
|
|
kRangeTertiaryTable, //u10xx
|
|
kRangeKorean, //u11xx
|
|
kRangeEthiopic, //u12xx
|
|
kRangeTertiaryTable, //u13xx
|
|
kRangeCanadian, //u14xx
|
|
kRangeCanadian, //u15xx
|
|
kRangeTertiaryTable, //u16xx
|
|
kRangeKhmer, //u17xx
|
|
kRangeMongolian, //u18xx
|
|
kRangeUnassigned, //u19xx
|
|
kRangeUnassigned, //u1axx
|
|
kRangeUnassigned, //u1bxx
|
|
kRangeUnassigned, //u1cxx
|
|
kRangeUnassigned, //u1dxx
|
|
kRangeSetLatin, //u1exx
|
|
kRangeGreek //u1fxx
|
|
},
|
|
{ //table for 2x--
|
|
kRangeSetLatin, //u20xx
|
|
kRangeSetLatin, //u21xx
|
|
kRangeMathOperators, //u22xx
|
|
kRangeMiscTechnical, //u23xx
|
|
kRangeControlOpticalEnclose, //u24xx
|
|
kRangeBoxBlockGeometrics, //u25xx
|
|
kRangeMiscSymbols, //u26xx
|
|
kRangeDingbats, //u27xx
|
|
kRangeBraillePattern, //u28xx
|
|
kRangeUnassigned, //u29xx
|
|
kRangeUnassigned, //u2axx
|
|
kRangeUnassigned, //u2bxx
|
|
kRangeUnassigned, //u2cxx
|
|
kRangeUnassigned, //u2dxx
|
|
kRangeSetCJK, //u2exx
|
|
kRangeSetCJK //u2fxx
|
|
},
|
|
{ //table for ax--
|
|
kRangeYi, //ua0xx
|
|
kRangeYi, //ua1xx
|
|
kRangeYi, //ua2xx
|
|
kRangeYi, //ua3xx
|
|
kRangeYi, //ua4xx
|
|
kRangeUnassigned, //ua5xx
|
|
kRangeUnassigned, //ua6xx
|
|
kRangeUnassigned, //ua7xx
|
|
kRangeUnassigned, //ua8xx
|
|
kRangeUnassigned, //ua9xx
|
|
kRangeUnassigned, //uaaxx
|
|
kRangeUnassigned, //uabxx
|
|
kRangeKorean, //uacxx
|
|
kRangeKorean, //uadxx
|
|
kRangeKorean, //uaexx
|
|
kRangeKorean //uafxx
|
|
},
|
|
{ //table for dx--
|
|
kRangeKorean, //ud0xx
|
|
kRangeKorean, //ud1xx
|
|
kRangeKorean, //ud2xx
|
|
kRangeKorean, //ud3xx
|
|
kRangeKorean, //ud4xx
|
|
kRangeKorean, //ud5xx
|
|
kRangeKorean, //ud6xx
|
|
kRangeKorean, //ud7xx
|
|
kRangeSurrogate, //ud8xx
|
|
kRangeSurrogate, //ud9xx
|
|
kRangeSurrogate, //udaxx
|
|
kRangeSurrogate, //udbxx
|
|
kRangeSurrogate, //udcxx
|
|
kRangeSurrogate, //uddxx
|
|
kRangeSurrogate, //udexx
|
|
kRangeSurrogate //udfxx
|
|
},
|
|
{ // table for fx--
|
|
kRangePrivate, //uf0xx
|
|
kRangePrivate, //uf1xx
|
|
kRangePrivate, //uf2xx
|
|
kRangePrivate, //uf3xx
|
|
kRangePrivate, //uf4xx
|
|
kRangePrivate, //uf5xx
|
|
kRangePrivate, //uf6xx
|
|
kRangePrivate, //uf7xx
|
|
kRangePrivate, //uf8xx
|
|
kRangeSetCJK, //uf9xx
|
|
kRangeSetCJK, //ufaxx
|
|
kRangeArabic, //ufbxx, includes alphabic presentation form
|
|
kRangeArabic, //ufcxx
|
|
kRangeArabic, //ufdxx
|
|
kRangeTableBase+8, //ufexx
|
|
kRangeTableBase+9 //uffxx, halfwidth and fullwidth forms, includes Specials
|
|
},
|
|
{ //table for 0x0500 - 0x05ff
|
|
kRangeCyrillic, //u050x
|
|
kRangeCyrillic, //u051x
|
|
kRangeCyrillic, //u052x
|
|
kRangeArmenian, //u053x
|
|
kRangeArmenian, //u054x
|
|
kRangeArmenian, //u055x
|
|
kRangeArmenian, //u056x
|
|
kRangeArmenian, //u057x
|
|
kRangeArmenian, //u058x
|
|
kRangeHebrew, //u059x
|
|
kRangeHebrew, //u05ax
|
|
kRangeHebrew, //u05bx
|
|
kRangeHebrew, //u05cx
|
|
kRangeHebrew, //u05dx
|
|
kRangeHebrew, //u05ex
|
|
kRangeHebrew //u05fx
|
|
},
|
|
{ //table for 0xfe00 - 0xfeff
|
|
kRangeSetCJK, //ufe0x
|
|
kRangeSetCJK, //ufe1x
|
|
kRangeSetCJK, //ufe2x
|
|
kRangeSetCJK, //ufe3x
|
|
kRangeSetCJK, //ufe4x
|
|
kRangeSetCJK, //ufe5x
|
|
kRangeSetCJK, //ufe6x
|
|
kRangeArabic, //ufe7x
|
|
kRangeArabic, //ufe8x
|
|
kRangeArabic, //ufe9x
|
|
kRangeArabic, //ufeax
|
|
kRangeArabic, //ufebx
|
|
kRangeArabic, //ufecx
|
|
kRangeArabic, //ufedx
|
|
kRangeArabic, //ufeex
|
|
kRangeArabic //ufefx
|
|
},
|
|
{ //table for 0xff00 - 0xffff
|
|
kRangeSetCJK, //uff0x, fullwidth latin
|
|
kRangeSetCJK, //uff1x, fullwidth latin
|
|
kRangeSetCJK, //uff2x, fullwidth latin
|
|
kRangeSetCJK, //uff3x, fullwidth latin
|
|
kRangeSetCJK, //uff4x, fullwidth latin
|
|
kRangeSetCJK, //uff5x, fullwidth latin
|
|
kRangeSetCJK, //uff6x, halfwidth katakana
|
|
kRangeSetCJK, //uff7x, halfwidth katakana
|
|
kRangeSetCJK, //uff8x, halfwidth katakana
|
|
kRangeSetCJK, //uff9x, halfwidth katakana
|
|
kRangeSetCJK, //uffax, halfwidth hangul jamo
|
|
kRangeSetCJK, //uffbx, halfwidth hangul jamo
|
|
kRangeSetCJK, //uffcx, halfwidth hangul jamo
|
|
kRangeSetCJK, //uffdx, halfwidth hangul jamo
|
|
kRangeSetCJK, //uffex, fullwidth symbols
|
|
kRangeSpecials, //ufffx, Specials
|
|
},
|
|
};
|
|
|
|
// Most scripts between U+0700 and U+16FF are assigned a chunk of 128 (0x80)
|
|
// code points so that the number of entries in the tertiary range
|
|
// table for that range is obtained by dividing (0x1700 - 0x0700) by 128.
|
|
// Exceptions: Ethiopic, Tibetan, Hangul Jamo and Canadian aboriginal
|
|
// syllabaries take multiple chunks and Ogham and Runic share a single chunk.
|
|
#define TERTIARY_TABLE_SIZE ((0x1700 - 0x0700) / 0x80)
|
|
|
|
static const uint8_t gUnicodeTertiaryRangeTable[TERTIARY_TABLE_SIZE] =
|
|
{ //table for 0x0700 - 0x1600
|
|
kRangeSyriac, //u070x
|
|
kRangeThaana, //u078x
|
|
kRangeUnassigned, //u080x place holder(resolved in the 2ndary tab.)
|
|
kRangeUnassigned, //u088x place holder(resolved in the 2ndary tab.)
|
|
kRangeDevanagari, //u090x
|
|
kRangeBengali, //u098x
|
|
kRangeGurmukhi, //u0a0x
|
|
kRangeGujarati, //u0a8x
|
|
kRangeOriya, //u0b0x
|
|
kRangeTamil, //u0b8x
|
|
kRangeTelugu, //u0c0x
|
|
kRangeKannada, //u0c8x
|
|
kRangeMalayalam, //u0d0x
|
|
kRangeSinhala, //u0d8x
|
|
kRangeThai, //u0e0x
|
|
kRangeLao, //u0e8x
|
|
kRangeTibetan, //u0f0x place holder(resolved in the 2ndary tab.)
|
|
kRangeTibetan, //u0f8x place holder(resolved in the 2ndary tab.)
|
|
kRangeMyanmar, //u100x
|
|
kRangeGeorgian, //u108x
|
|
kRangeKorean, //u110x place holder(resolved in the 2ndary tab.)
|
|
kRangeKorean, //u118x place holder(resolved in the 2ndary tab.)
|
|
kRangeEthiopic, //u120x place holder(resolved in the 2ndary tab.)
|
|
kRangeEthiopic, //u128x place holder(resolved in the 2ndary tab.)
|
|
kRangeEthiopic, //u130x
|
|
kRangeCherokee, //u138x
|
|
kRangeCanadian, //u140x place holder(resolved in the 2ndary tab.)
|
|
kRangeCanadian, //u148x place holder(resolved in the 2ndary tab.)
|
|
kRangeCanadian, //u150x place holder(resolved in the 2ndary tab.)
|
|
kRangeCanadian, //u158x place holder(resolved in the 2ndary tab.)
|
|
kRangeCanadian, //u160x
|
|
kRangeOghamRunic //u168x this contains two scripts, Ogham & Runic
|
|
};
|
|
|
|
// A two level index is almost enough for locating a range, with the
|
|
// exception of u03xx and u05xx. Since we don't really care about range for
|
|
// combining diacritical marks in our font application, they are
|
|
// not discriminated further. But future adoption of this module for other use
|
|
// should be aware of this limitation. The implementation can be extended if
|
|
// there is such a need.
|
|
// For Indic, Southeast Asian scripts and some other scripts between
|
|
// U+0700 and U+16FF, it's extended to the third level.
|
|
uint32_t FindCharUnicodeRange(uint32_t ch)
|
|
{
|
|
uint32_t range;
|
|
|
|
// aggregate ranges for non-BMP codepoints
|
|
if (ch > 0xFFFF) {
|
|
uint32_t p = (ch >> 16);
|
|
if (p == 1) {
|
|
return kRangeSMP;
|
|
} else if (p == 2) {
|
|
return kRangeSetCJK;
|
|
}
|
|
return kRangeHigherPlanes;
|
|
}
|
|
|
|
// lookup explicit range for BMP codepoints
|
|
// first general range
|
|
range = gUnicodeSubrangeTable[0][ch >> 12];
|
|
|
|
// if general range is good enough, return that
|
|
if (range < kRangeTableBase)
|
|
// we try to get a specific range
|
|
return range;
|
|
|
|
// otherwise, use subrange tables
|
|
range = gUnicodeSubrangeTable[range - kRangeTableBase][(ch & 0x0f00) >> 8];
|
|
if (range < kRangeTableBase)
|
|
return range;
|
|
if (range < kRangeTertiaryTable)
|
|
return gUnicodeSubrangeTable[range - kRangeTableBase][(ch & 0x00f0) >> 4];
|
|
|
|
// Yet another table to look at : U+0700 - U+16FF : 128 code point blocks
|
|
return gUnicodeTertiaryRangeTable[(ch - 0x0700) >> 7];
|
|
}
|
|
|
|
nsIAtom *LangGroupFromUnicodeRange(uint8_t unicodeRange)
|
|
{
|
|
if (kRangeSpecificItemNum > unicodeRange) {
|
|
nsIAtom **atom = gUnicodeRangeToLangGroupAtomTable[unicodeRange];
|
|
return *atom;
|
|
}
|
|
return nullptr;
|
|
}
|