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-rw-r--r--intl/unicharutil/util/nsBidiUtils.cpp84
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;
+}