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authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /intl/unicharutil/util/nsBidiUtils.cpp
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
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Add m-esr52 at 52.6.0
Diffstat (limited to 'intl/unicharutil/util/nsBidiUtils.cpp')
-rw-r--r--intl/unicharutil/util/nsBidiUtils.cpp99
1 files changed, 99 insertions, 0 deletions
diff --git a/intl/unicharutil/util/nsBidiUtils.cpp b/intl/unicharutil/util/nsBidiUtils.cpp
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index 000000000..8c186ac68
--- /dev/null
+++ b/intl/unicharutil/util/nsBidiUtils.cpp
@@ -0,0 +1,99 @@
+/* -*- 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) {
+ if (aNumFlag == IBMBIDI_NUMERAL_PERSIANCONTEXT)
+ return NUM_TO_PERSIAN(aChar);
+ else
+ return NUM_TO_HINDI(aChar);
+ }
+ else
+ 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;
+}
+
+bool HasRTLChars(const nsAString& aString)
+{
+// This is used to determine whether to enable bidi if a string has
+// right-to-left characters. To simplify things, anything that could be a
+// surrogate or RTL presentation form is covered just by testing >= 0xD800).
+// It's fine to enable bidi in rare cases where it actually isn't needed.
+ int32_t length = aString.Length();
+ for (int32_t i = 0; i < length; i++) {
+ char16_t ch = aString.CharAt(i);
+ if (ch >= 0xD800 || IS_IN_BMP_RTL_BLOCK(ch)) {
+ return true;
+ }
+ }
+ return false;
+}