1 files changed, 84 insertions, 0 deletions
diff --git a/intl/unicharutil/util/nsBidiUtils.cpp b/intl/unicharutil/util/nsBidiUtils.cpp
new file mode 100644
index 0000000000..6c399dbc46
--- /dev/null
+++ b/intl/unicharutil/util/nsBidiUtils.cpp
@@ -0,0 +1,84 @@
+/* -*- 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 "nsBidiUtils.h"
+
+#define ARABIC_TO_HINDI_DIGIT_INCREMENT \
+  (START_HINDI_DIGITS - START_ARABIC_DIGITS)
+#define PERSIAN_TO_HINDI_DIGIT_INCREMENT \
+  (START_HINDI_DIGITS - START_FARSI_DIGITS)
+#define ARABIC_TO_PERSIAN_DIGIT_INCREMENT \
+  (START_FARSI_DIGITS - START_ARABIC_DIGITS)
+#define NUM_TO_ARABIC(c)                                             \
+  ((((c) >= START_HINDI_DIGITS) && ((c) <= END_HINDI_DIGITS))        \
+       ? ((c) - (uint16_t)ARABIC_TO_HINDI_DIGIT_INCREMENT)           \
+       : ((((c) >= START_FARSI_DIGITS) && ((c) <= END_FARSI_DIGITS)) \
+              ? ((c) - (uint16_t)ARABIC_TO_PERSIAN_DIGIT_INCREMENT)  \
+              : (c)))
+#define NUM_TO_HINDI(c)                                              \
+  ((((c) >= START_ARABIC_DIGITS) && ((c) <= END_ARABIC_DIGITS))      \
+       ? ((c) + (uint16_t)ARABIC_TO_HINDI_DIGIT_INCREMENT)           \
+       : ((((c) >= START_FARSI_DIGITS) && ((c) <= END_FARSI_DIGITS)) \
+              ? ((c) + (uint16_t)PERSIAN_TO_HINDI_DIGIT_INCREMENT)   \
+              : (c)))
+#define NUM_TO_PERSIAN(c)                                              \
+  ((((c) >= START_HINDI_DIGITS) && ((c) <= END_HINDI_DIGITS))          \
+       ? ((c) - (uint16_t)PERSIAN_TO_HINDI_DIGIT_INCREMENT)            \
+       : ((((c) >= START_ARABIC_DIGITS) && ((c) <= END_ARABIC_DIGITS)) \
+              ? ((c) + (uint16_t)ARABIC_TO_PERSIAN_DIGIT_INCREMENT)    \
+              : (c)))
+
+char16_t HandleNumberInChar(char16_t aChar, bool aPrevCharArabic,
+                            uint32_t aNumFlag) {
+  // IBMBIDI_NUMERAL_NOMINAL *
+  // IBMBIDI_NUMERAL_REGULAR
+  // IBMBIDI_NUMERAL_HINDICONTEXT
+  // IBMBIDI_NUMERAL_ARABIC
+  // IBMBIDI_NUMERAL_HINDI
+
+  switch (aNumFlag) {
+    case IBMBIDI_NUMERAL_HINDI:
+      return NUM_TO_HINDI(aChar);
+    case IBMBIDI_NUMERAL_ARABIC:
+      return NUM_TO_ARABIC(aChar);
+    case IBMBIDI_NUMERAL_PERSIAN:
+      return NUM_TO_PERSIAN(aChar);
+    case IBMBIDI_NUMERAL_REGULAR:
+    case IBMBIDI_NUMERAL_HINDICONTEXT:
+    case IBMBIDI_NUMERAL_PERSIANCONTEXT:
+      // for clipboard handling
+      // XXX do we really want to convert numerals when copying text?
+      if (aPrevCharArabic) {
+        return aNumFlag == IBMBIDI_NUMERAL_PERSIANCONTEXT
+                   ? NUM_TO_PERSIAN(aChar)
+                   : NUM_TO_HINDI(aChar);
+      }
+      return NUM_TO_ARABIC(aChar);
+    case IBMBIDI_NUMERAL_NOMINAL:
+    default:
+      return aChar;
+  }
+}
+
+nsresult HandleNumbers(char16_t* aBuffer, uint32_t aSize, uint32_t aNumFlag) {
+  uint32_t i;
+
+  switch (aNumFlag) {
+    case IBMBIDI_NUMERAL_HINDI:
+    case IBMBIDI_NUMERAL_ARABIC:
+    case IBMBIDI_NUMERAL_PERSIAN:
+    case IBMBIDI_NUMERAL_REGULAR:
+    case IBMBIDI_NUMERAL_HINDICONTEXT:
+    case IBMBIDI_NUMERAL_PERSIANCONTEXT:
+      for (i = 0; i < aSize; i++)
+        aBuffer[i] = HandleNumberInChar(
+            aBuffer[i], !!(i > 0 ? aBuffer[i - 1] : 0), aNumFlag);
+      break;
+    case IBMBIDI_NUMERAL_NOMINAL:
+    default:
+      break;
+  }
+  return NS_OK;
+}