1 files changed, 303 insertions, 0 deletions
diff --git a/intl/unicharutil/util/nsUnicodeProperties.h b/intl/unicharutil/util/nsUnicodeProperties.h
new file mode 100644
index 000000000..ba5526a4d
--- /dev/null
+++ b/intl/unicharutil/util/nsUnicodeProperties.h
@@ -0,0 +1,303 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* vim:set ts=4 sw=4 sts=4 et cindent: */
+/* 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/. */
+
+#ifndef NS_UNICODEPROPERTIES_H
+#define NS_UNICODEPROPERTIES_H
+
+#include "nsBidiUtils.h"
+#include "nsIUGenCategory.h"
+#include "nsUnicodeScriptCodes.h"
+#include "harfbuzz/hb.h"
+
+#if ENABLE_INTL_API
+#include "unicode/uchar.h"
+#include "unicode/uscript.h"
+#endif
+
+const nsCharProps2& GetCharProps2(uint32_t aCh);
+
+namespace mozilla {
+
+namespace unicode {
+
+extern const nsIUGenCategory::nsUGenCategory sDetailedToGeneralCategory[];
+
+/* This MUST match the values assigned by genUnicodePropertyData.pl! */
+enum VerticalOrientation {
+  VERTICAL_ORIENTATION_U  = 0,
+  VERTICAL_ORIENTATION_R  = 1,
+  VERTICAL_ORIENTATION_Tu = 2,
+  VERTICAL_ORIENTATION_Tr = 3
+};
+
+/* This MUST match the values assigned by genUnicodePropertyData.pl! */
+enum PairedBracketType {
+  PAIRED_BRACKET_TYPE_NONE = 0,
+  PAIRED_BRACKET_TYPE_OPEN = 1,
+  PAIRED_BRACKET_TYPE_CLOSE = 2
+};
+
+enum XidmodType {
+  XIDMOD_RECOMMENDED,
+  XIDMOD_INCLUSION,
+  XIDMOD_UNCOMMON_USE,
+  XIDMOD_TECHNICAL,
+  XIDMOD_OBSOLETE,
+  XIDMOD_ASPIRATIONAL,
+  XIDMOD_LIMITED_USE,
+  XIDMOD_EXCLUSION,
+  XIDMOD_NOT_XID,
+  XIDMOD_NOT_NFKC,
+  XIDMOD_DEFAULT_IGNORABLE,
+  XIDMOD_DEPRECATED,
+  XIDMOD_NOT_CHARS
+};
+
+#if ENABLE_INTL_API // ICU is available, so simply forward to its API
+
+extern const hb_unicode_general_category_t sICUtoHBcategory[];
+
+inline uint32_t
+GetMirroredChar(uint32_t aCh)
+{
+  return u_charMirror(aCh);
+}
+
+inline bool
+HasMirroredChar(uint32_t aCh)
+{
+  return u_isMirrored(aCh);
+}
+
+inline uint8_t
+GetCombiningClass(uint32_t aCh)
+{
+  return u_getCombiningClass(aCh);
+}
+
+inline uint8_t
+GetGeneralCategory(uint32_t aCh)
+{
+  return sICUtoHBcategory[u_charType(aCh)];
+}
+
+inline nsCharType
+GetBidiCat(uint32_t aCh)
+{
+  return nsCharType(u_charDirection(aCh));
+}
+
+inline int8_t
+GetNumericValue(uint32_t aCh)
+{
+  UNumericType type =
+    UNumericType(u_getIntPropertyValue(aCh, UCHAR_NUMERIC_TYPE));
+  return type == U_NT_DECIMAL || type == U_NT_DIGIT
+         ? int8_t(u_getNumericValue(aCh)) : -1;
+}
+
+inline uint8_t
+GetLineBreakClass(uint32_t aCh)
+{
+  return u_getIntPropertyValue(aCh, UCHAR_LINE_BREAK);
+}
+
+inline Script
+GetScriptCode(uint32_t aCh)
+{
+  UErrorCode err = U_ZERO_ERROR;
+  return Script(uscript_getScript(aCh, &err));
+}
+
+inline uint32_t
+GetScriptTagForCode(Script aScriptCode)
+{
+  const char* tag = uscript_getShortName(UScriptCode(aScriptCode));
+  return HB_TAG(tag[0], tag[1], tag[2], tag[3]);
+}
+
+inline PairedBracketType
+GetPairedBracketType(uint32_t aCh)
+{
+  return PairedBracketType
+           (u_getIntPropertyValue(aCh, UCHAR_BIDI_PAIRED_BRACKET_TYPE));
+}
+
+inline uint32_t
+GetPairedBracket(uint32_t aCh)
+{
+  return u_getBidiPairedBracket(aCh);
+}
+
+inline uint32_t
+GetUppercase(uint32_t aCh)
+{
+  return u_toupper(aCh);
+}
+
+inline uint32_t
+GetLowercase(uint32_t aCh)
+{
+  return u_tolower(aCh);
+}
+
+inline uint32_t
+GetTitlecaseForLower(uint32_t aCh) // maps LC to titlecase, UC unchanged
+{
+  return u_isULowercase(aCh) ? u_totitle(aCh) : aCh;
+}
+
+inline uint32_t
+GetTitlecaseForAll(uint32_t aCh) // maps both UC and LC to titlecase
+{
+  return u_totitle(aCh);
+}
+
+inline bool
+IsEastAsianWidthFWH(uint32_t aCh)
+{
+  switch (u_getIntPropertyValue(aCh, UCHAR_EAST_ASIAN_WIDTH)) {
+    case U_EA_FULLWIDTH:
+    case U_EA_WIDE:
+    case U_EA_HALFWIDTH:
+      return true;
+    case U_EA_AMBIGUOUS:
+    case U_EA_NARROW:
+    case U_EA_NEUTRAL:
+      return false;
+  }
+  return false;
+}
+
+#else // not ENABLE_INTL_API
+
+// Return whether the char has a mirrored-pair counterpart.
+uint32_t GetMirroredChar(uint32_t aCh);
+
+bool HasMirroredChar(uint32_t aChr);
+
+uint8_t GetCombiningClass(uint32_t aCh);
+
+// returns the detailed General Category in terms of HB_UNICODE_* values
+uint8_t GetGeneralCategory(uint32_t aCh);
+
+nsCharType GetBidiCat(uint32_t aCh);
+
+uint8_t GetLineBreakClass(uint32_t aCh);
+
+Script GetScriptCode(uint32_t aCh);
+
+uint32_t GetScriptTagForCode(Script aScriptCode);
+
+PairedBracketType GetPairedBracketType(uint32_t aCh);
+uint32_t GetPairedBracket(uint32_t aCh);
+
+/**
+ * Return the numeric value of the character. The value returned is the value
+ * of the Numeric_Value in field 7 of the UCD, or -1 if field 7 is empty.
+ * To restrict to decimal digits, the caller should also check whether
+ * GetGeneralCategory returns HB_UNICODE_GENERAL_CATEGORY_DECIMAL_NUMBER
+ */
+int8_t GetNumericValue(uint32_t aCh);
+
+uint32_t GetUppercase(uint32_t aCh);
+uint32_t GetLowercase(uint32_t aCh);
+uint32_t GetTitlecaseForLower(uint32_t aCh); // maps LC to titlecase, UC unchanged
+uint32_t GetTitlecaseForAll(uint32_t aCh); // maps both UC and LC to titlecase
+
+// Return whether the char has EastAsianWidth class F or W or H.
+bool IsEastAsianWidthFWH(uint32_t aCh);
+
+#endif // !ENABLE_INTL_API
+
+// returns the simplified Gen Category as defined in nsIUGenCategory
+inline nsIUGenCategory::nsUGenCategory GetGenCategory(uint32_t aCh) {
+  return sDetailedToGeneralCategory[GetGeneralCategory(aCh)];
+}
+
+inline VerticalOrientation GetVerticalOrientation(uint32_t aCh) {
+  return VerticalOrientation(GetCharProps2(aCh).mVertOrient);
+}
+
+inline XidmodType GetIdentifierModification(uint32_t aCh) {
+  return XidmodType(GetCharProps2(aCh).mXidmod);
+}
+
+uint32_t GetFullWidth(uint32_t aCh);
+// This is the reverse function of GetFullWidth which guarantees that
+// for every codepoint c, GetFullWidthInverse(GetFullWidth(c)) == c.
+// Note that, this function does not guarantee to convert all wide
+// form characters to their possible narrow form.
+uint32_t GetFullWidthInverse(uint32_t aCh);
+
+bool IsClusterExtender(uint32_t aCh, uint8_t aCategory);
+
+inline bool IsClusterExtender(uint32_t aCh) {
+  return IsClusterExtender(aCh, GetGeneralCategory(aCh));
+}
+
+// A simple iterator for a string of char16_t codepoints that advances
+// by Unicode grapheme clusters
+class ClusterIterator
+{
+public:
+    ClusterIterator(const char16_t* aText, uint32_t aLength)
+        : mPos(aText), mLimit(aText + aLength)
+#ifdef DEBUG
+        , mText(aText)
+#endif
+    { }
+
+    operator const char16_t* () const {
+        return mPos;
+    }
+
+    bool AtEnd() const {
+        return mPos >= mLimit;
+    }
+
+    void Next();
+
+private:
+    const char16_t* mPos;
+    const char16_t* mLimit;
+#ifdef DEBUG
+    const char16_t* mText;
+#endif
+};
+
+// Count the number of grapheme clusters in the given string
+uint32_t CountGraphemeClusters(const char16_t* aText, uint32_t aLength);
+
+// A simple reverse iterator for a string of char16_t codepoints that
+// advances by Unicode grapheme clusters
+class ClusterReverseIterator
+{
+public:
+    ClusterReverseIterator(const char16_t* aText, uint32_t aLength)
+        : mPos(aText + aLength), mLimit(aText)
+    { }
+
+    operator const char16_t* () const {
+        return mPos;
+    }
+
+    bool AtEnd() const {
+        return mPos <= mLimit;
+    }
+
+    void Next();
+
+private:
+    const char16_t* mPos;
+    const char16_t* mLimit;
+};
+
+} // end namespace unicode
+
+} // end namespace mozilla
+
+#endif /* NS_UNICODEPROPERTIES_H */