/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- * 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 "nsUnicodeProperties.h" #include "nsUnicodePropertyData.cpp" #include "mozilla/ArrayUtils.h" #include "nsCharTraits.h" #if ENABLE_INTL_API #include "unicode/uchar.h" #endif #define UNICODE_BMP_LIMIT 0x10000 #define UNICODE_LIMIT 0x110000 #ifndef ENABLE_INTL_API static const nsCharProps1& GetCharProps1(uint32_t aCh) { if (aCh < UNICODE_BMP_LIMIT) { return sCharProp1Values[sCharProp1Pages[0][aCh >> kCharProp1CharBits]] [aCh & ((1 << kCharProp1CharBits) - 1)]; } if (aCh < (kCharProp1MaxPlane + 1) * 0x10000) { return sCharProp1Values[sCharProp1Pages[sCharProp1Planes[(aCh >> 16) - 1]] [(aCh & 0xffff) >> kCharProp1CharBits]] [aCh & ((1 << kCharProp1CharBits) - 1)]; } // Default values for unassigned static const nsCharProps1 undefined = { 0, // Index to mirrored char offsets 0, // Hangul Syllable type 0 // Combining class }; return undefined; } #endif const nsCharProps2& GetCharProps2(uint32_t aCh) { if (aCh < UNICODE_BMP_LIMIT) { return sCharProp2Values[sCharProp2Pages[0][aCh >> kCharProp2CharBits]] [aCh & ((1 << kCharProp2CharBits) - 1)]; } if (aCh < (kCharProp2MaxPlane + 1) * 0x10000) { return sCharProp2Values[sCharProp2Pages[sCharProp2Planes[(aCh >> 16) - 1]] [(aCh & 0xffff) >> kCharProp2CharBits]] [aCh & ((1 << kCharProp2CharBits) - 1)]; } NS_NOTREACHED("Getting CharProps for codepoint outside Unicode range"); // Default values for unassigned static const nsCharProps2 undefined = { MOZ_SCRIPT_UNKNOWN, // Script code 0, // East Asian Width HB_UNICODE_GENERAL_CATEGORY_UNASSIGNED, // General Category eCharType_LeftToRight, // Bidi Category mozilla::unicode::XIDMOD_NOT_CHARS, // Xidmod -1, // Numeric Value mozilla::unicode::HVT_NotHan // Han variant }; return undefined; } namespace mozilla { namespace unicode { /* To store properties for a million Unicode codepoints compactly, we use a three-level array structure, with the Unicode values considered as three elements: Plane, Page, and Char. Space optimization happens because multiple Planes can refer to the same Page array, and multiple Pages can refer to the same Char array holding the actual values. In practice, most of the higher planes are empty and thus share the same data; and within the BMP, there are also many pages that repeat the same data for any given property. Plane is usually zero, so we skip a lookup in this case, and require that the Plane 0 pages are always the first set of entries in the Page array. The division of the remaining 16 bits into Page and Char fields is adjusted for each property (by experiment using the generation tool) to provide the most compact storage, depending on the distribution of values. */ nsIUGenCategory::nsUGenCategory sDetailedToGeneralCategory[] = { /* * The order here corresponds to the HB_UNICODE_GENERAL_CATEGORY_* constants * of the hb_unicode_general_category_t enum in gfx/harfbuzz/src/hb-unicode.h. */ /* CONTROL */ nsIUGenCategory::kOther, /* FORMAT */ nsIUGenCategory::kOther, /* UNASSIGNED */ nsIUGenCategory::kOther, /* PRIVATE_USE */ nsIUGenCategory::kOther, /* SURROGATE */ nsIUGenCategory::kOther, /* LOWERCASE_LETTER */ nsIUGenCategory::kLetter, /* MODIFIER_LETTER */ nsIUGenCategory::kLetter, /* OTHER_LETTER */ nsIUGenCategory::kLetter, /* TITLECASE_LETTER */ nsIUGenCategory::kLetter, /* UPPERCASE_LETTER */ nsIUGenCategory::kLetter, /* COMBINING_MARK */ nsIUGenCategory::kMark, /* ENCLOSING_MARK */ nsIUGenCategory::kMark, /* NON_SPACING_MARK */ nsIUGenCategory::kMark, /* DECIMAL_NUMBER */ nsIUGenCategory::kNumber, /* LETTER_NUMBER */ nsIUGenCategory::kNumber, /* OTHER_NUMBER */ nsIUGenCategory::kNumber, /* CONNECT_PUNCTUATION */ nsIUGenCategory::kPunctuation, /* DASH_PUNCTUATION */ nsIUGenCategory::kPunctuation, /* CLOSE_PUNCTUATION */ nsIUGenCategory::kPunctuation, /* FINAL_PUNCTUATION */ nsIUGenCategory::kPunctuation, /* INITIAL_PUNCTUATION */ nsIUGenCategory::kPunctuation, /* OTHER_PUNCTUATION */ nsIUGenCategory::kPunctuation, /* OPEN_PUNCTUATION */ nsIUGenCategory::kPunctuation, /* CURRENCY_SYMBOL */ nsIUGenCategory::kSymbol, /* MODIFIER_SYMBOL */ nsIUGenCategory::kSymbol, /* MATH_SYMBOL */ nsIUGenCategory::kSymbol, /* OTHER_SYMBOL */ nsIUGenCategory::kSymbol, /* LINE_SEPARATOR */ nsIUGenCategory::kSeparator, /* PARAGRAPH_SEPARATOR */ nsIUGenCategory::kSeparator, /* SPACE_SEPARATOR */ nsIUGenCategory::kSeparator }; uint32_t GetMirroredChar(uint32_t aCh) { #if ENABLE_INTL_API return u_charMirror(aCh); #else return aCh + sMirrorOffsets[GetCharProps1(aCh).mMirrorOffsetIndex]; #endif } bool HasMirroredChar(uint32_t aCh) { #if ENABLE_INTL_API return u_isMirrored(aCh); #else return GetCharProps1(aCh).mMirrorOffsetIndex != 0; #endif } uint8_t GetCombiningClass(uint32_t aCh) { #if ENABLE_INTL_API return u_getCombiningClass(aCh); #else return GetCharProps1(aCh).mCombiningClass; #endif } uint32_t GetScriptTagForCode(int32_t aScriptCode) { // this will safely return 0 for negative script codes, too :) if (uint32_t(aScriptCode) > ArrayLength(sScriptCodeToTag)) { return 0; } return sScriptCodeToTag[aScriptCode]; } PairedBracketType GetPairedBracketType(uint32_t aCh) { #if ENABLE_INTL_API return PairedBracketType (u_getIntPropertyValue(aCh, UCHAR_BIDI_PAIRED_BRACKET_TYPE)); #else return PairedBracketType(GetCharProps2(aCh).mPairedBracketType); #endif } uint32_t GetPairedBracket(uint32_t aCh) { #if ENABLE_INTL_API return u_getBidiPairedBracket(aCh); #else return GetPairedBracketType(aCh) != PAIRED_BRACKET_TYPE_NONE ? GetMirroredChar(aCh) : aCh; #endif } static inline uint32_t GetCaseMapValue(uint32_t aCh) { if (aCh < UNICODE_BMP_LIMIT) { return sCaseMapValues[sCaseMapPages[0][aCh >> kCaseMapCharBits]] [aCh & ((1 << kCaseMapCharBits) - 1)]; } if (aCh < (kCaseMapMaxPlane + 1) * 0x10000) { return sCaseMapValues[sCaseMapPages[sCaseMapPlanes[(aCh >> 16) - 1]] [(aCh & 0xffff) >> kCaseMapCharBits]] [aCh & ((1 << kCaseMapCharBits) - 1)]; } return 0; } uint32_t GetUppercase(uint32_t aCh) { uint32_t mapValue = GetCaseMapValue(aCh); if (mapValue & (kLowerToUpper | kTitleToUpper)) { return aCh ^ (mapValue & kCaseMapCharMask); } if (mapValue & kLowerToTitle) { return GetUppercase(aCh ^ (mapValue & kCaseMapCharMask)); } return aCh; } uint32_t GetLowercase(uint32_t aCh) { uint32_t mapValue = GetCaseMapValue(aCh); if (mapValue & kUpperToLower) { return aCh ^ (mapValue & kCaseMapCharMask); } if (mapValue & kTitleToUpper) { return GetLowercase(aCh ^ (mapValue & kCaseMapCharMask)); } return aCh; } uint32_t GetTitlecaseForLower(uint32_t aCh) { uint32_t mapValue = GetCaseMapValue(aCh); if (mapValue & (kLowerToTitle | kLowerToUpper)) { return aCh ^ (mapValue & kCaseMapCharMask); } return aCh; } uint32_t GetTitlecaseForAll(uint32_t aCh) { uint32_t mapValue = GetCaseMapValue(aCh); if (mapValue & (kLowerToTitle | kLowerToUpper)) { return aCh ^ (mapValue & kCaseMapCharMask); } if (mapValue & kUpperToLower) { return GetTitlecaseForLower(aCh ^ (mapValue & kCaseMapCharMask)); } return aCh; } HanVariantType GetHanVariant(uint32_t aCh) { // In the sHanVariantValues array, data for 4 successive characters // (2 bits each) is packed in to each uint8_t entry, with the value // for the lowest character stored in the least significant bits. uint8_t v = 0; if (aCh < UNICODE_BMP_LIMIT) { v = sHanVariantValues[sHanVariantPages[0][aCh >> kHanVariantCharBits]] [(aCh & ((1 << kHanVariantCharBits) - 1)) >> 2]; } else if (aCh < (kHanVariantMaxPlane + 1) * 0x10000) { v = sHanVariantValues[sHanVariantPages[sHanVariantPlanes[(aCh >> 16) - 1]] [(aCh & 0xffff) >> kHanVariantCharBits]] [(aCh & ((1 << kHanVariantCharBits) - 1)) >> 2]; } // extract the appropriate 2-bit field from the value return HanVariantType((v >> ((aCh & 3) * 2)) & 3); } uint32_t GetFullWidth(uint32_t aCh) { // full-width mappings only exist for BMP characters; all others are // returned unchanged if (aCh < UNICODE_BMP_LIMIT) { uint32_t v = sFullWidthValues[sFullWidthPages[aCh >> kFullWidthCharBits]] [aCh & ((1 << kFullWidthCharBits) - 1)]; if (v) { // return the mapped value if non-zero; else return original char return v; } } return aCh; } bool IsClusterExtender(uint32_t aCh, uint8_t aCategory) { return ((aCategory >= HB_UNICODE_GENERAL_CATEGORY_SPACING_MARK && aCategory <= HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK) || (aCh >= 0x200c && aCh <= 0x200d) || // ZWJ, ZWNJ (aCh >= 0xff9e && aCh <= 0xff9f)); // katakana sound marks } enum HSType { #if ENABLE_INTL_API HST_NONE = U_HST_NOT_APPLICABLE, HST_L = U_HST_LEADING_JAMO, HST_V = U_HST_VOWEL_JAMO, HST_T = U_HST_TRAILING_JAMO, HST_LV = U_HST_LV_SYLLABLE, HST_LVT = U_HST_LVT_SYLLABLE #else HST_NONE = 0x00, HST_L = 0x01, HST_V = 0x02, HST_T = 0x04, HST_LV = 0x03, HST_LVT = 0x07 #endif }; static HSType GetHangulSyllableType(uint32_t aCh) { #if ENABLE_INTL_API return HSType(u_getIntPropertyValue(aCh, UCHAR_HANGUL_SYLLABLE_TYPE)); #else return HSType(GetCharProps1(aCh).mHangulType); #endif } void ClusterIterator::Next() { if (AtEnd()) { NS_WARNING("ClusterIterator has already reached the end"); return; } uint32_t ch = *mPos++; if (NS_IS_HIGH_SURROGATE(ch) && mPos < mLimit && NS_IS_LOW_SURROGATE(*mPos)) { ch = SURROGATE_TO_UCS4(ch, *mPos++); } else if ((ch & ~0xff) == 0x1100 || (ch >= 0xa960 && ch <= 0xa97f) || (ch >= 0xac00 && ch <= 0xd7ff)) { // Handle conjoining Jamo that make Hangul syllables HSType hangulState = GetHangulSyllableType(ch); while (mPos < mLimit) { ch = *mPos; HSType hangulType = GetHangulSyllableType(ch); switch (hangulType) { case HST_L: case HST_LV: case HST_LVT: if (hangulState == HST_L) { hangulState = hangulType; mPos++; continue; } break; case HST_V: if ((hangulState != HST_NONE) && (hangulState != HST_T) && (hangulState != HST_LVT)) { hangulState = hangulType; mPos++; continue; } break; case HST_T: if (hangulState != HST_NONE && hangulState != HST_L) { hangulState = hangulType; mPos++; continue; } break; default: break; } break; } } while (mPos < mLimit) { ch = *mPos; // Check for surrogate pairs; note that isolated surrogates will just // be treated as generic (non-cluster-extending) characters here, // which is fine for cluster-iterating purposes if (NS_IS_HIGH_SURROGATE(ch) && mPos < mLimit - 1 && NS_IS_LOW_SURROGATE(*(mPos + 1))) { ch = SURROGATE_TO_UCS4(ch, *(mPos + 1)); } if (!IsClusterExtender(ch)) { break; } mPos++; if (!IS_IN_BMP(ch)) { mPos++; } } NS_ASSERTION(mText < mPos && mPos <= mLimit, "ClusterIterator::Next has overshot the string!"); } } // end namespace unicode } // end namespace mozilla