1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
2 *
3 * This Source Code Form is subject to the terms of the Mozilla Public
4 * License, v. 2.0. If a copy of the MPL was not distributed with this
5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6 #include "nsBidiUtils.h"
7
8 namespace mozilla {
9 static const uint32_t kMinRTLChar = 0x0590;
10 } // namespace mozilla
11
12 #define ARABIC_TO_HINDI_DIGIT_INCREMENT \
13 (START_HINDI_DIGITS - START_ARABIC_DIGITS)
14 #define PERSIAN_TO_HINDI_DIGIT_INCREMENT \
15 (START_HINDI_DIGITS - START_FARSI_DIGITS)
16 #define ARABIC_TO_PERSIAN_DIGIT_INCREMENT \
17 (START_FARSI_DIGITS - START_ARABIC_DIGITS)
18 #define NUM_TO_ARABIC(c) \
19 ((((c) >= START_HINDI_DIGITS) && ((c) <= END_HINDI_DIGITS)) \
20 ? ((c) - (uint16_t)ARABIC_TO_HINDI_DIGIT_INCREMENT) \
21 : ((((c) >= START_FARSI_DIGITS) && ((c) <= END_FARSI_DIGITS)) \
22 ? ((c) - (uint16_t)ARABIC_TO_PERSIAN_DIGIT_INCREMENT) \
23 : (c)))
24 #define NUM_TO_HINDI(c) \
25 ((((c) >= START_ARABIC_DIGITS) && ((c) <= END_ARABIC_DIGITS)) \
26 ? ((c) + (uint16_t)ARABIC_TO_HINDI_DIGIT_INCREMENT) \
27 : ((((c) >= START_FARSI_DIGITS) && ((c) <= END_FARSI_DIGITS)) \
28 ? ((c) + (uint16_t)PERSIAN_TO_HINDI_DIGIT_INCREMENT) \
29 : (c)))
30 #define NUM_TO_PERSIAN(c) \
31 ((((c) >= START_HINDI_DIGITS) && ((c) <= END_HINDI_DIGITS)) \
32 ? ((c) - (uint16_t)PERSIAN_TO_HINDI_DIGIT_INCREMENT) \
33 : ((((c) >= START_ARABIC_DIGITS) && ((c) <= END_ARABIC_DIGITS)) \
34 ? ((c) + (uint16_t)ARABIC_TO_PERSIAN_DIGIT_INCREMENT) \
35 : (c)))
36
HandleNumberInChar(char16_t aChar,bool aPrevCharArabic,uint32_t aNumFlag)37 char16_t HandleNumberInChar(char16_t aChar, bool aPrevCharArabic,
38 uint32_t aNumFlag) {
39 // IBMBIDI_NUMERAL_NOMINAL *
40 // IBMBIDI_NUMERAL_REGULAR
41 // IBMBIDI_NUMERAL_HINDICONTEXT
42 // IBMBIDI_NUMERAL_ARABIC
43 // IBMBIDI_NUMERAL_HINDI
44
45 switch (aNumFlag) {
46 case IBMBIDI_NUMERAL_HINDI:
47 return NUM_TO_HINDI(aChar);
48 case IBMBIDI_NUMERAL_ARABIC:
49 return NUM_TO_ARABIC(aChar);
50 case IBMBIDI_NUMERAL_PERSIAN:
51 return NUM_TO_PERSIAN(aChar);
52 case IBMBIDI_NUMERAL_REGULAR:
53 case IBMBIDI_NUMERAL_HINDICONTEXT:
54 case IBMBIDI_NUMERAL_PERSIANCONTEXT:
55 // for clipboard handling
56 // XXX do we really want to convert numerals when copying text?
57 if (aPrevCharArabic) {
58 return aNumFlag == IBMBIDI_NUMERAL_PERSIANCONTEXT
59 ? NUM_TO_PERSIAN(aChar)
60 : NUM_TO_HINDI(aChar);
61 }
62 return NUM_TO_ARABIC(aChar);
63 case IBMBIDI_NUMERAL_NOMINAL:
64 default:
65 return aChar;
66 }
67 }
68
HandleNumbers(char16_t * aBuffer,uint32_t aSize,uint32_t aNumFlag)69 nsresult HandleNumbers(char16_t* aBuffer, uint32_t aSize, uint32_t aNumFlag) {
70 uint32_t i;
71
72 switch (aNumFlag) {
73 case IBMBIDI_NUMERAL_HINDI:
74 case IBMBIDI_NUMERAL_ARABIC:
75 case IBMBIDI_NUMERAL_PERSIAN:
76 case IBMBIDI_NUMERAL_REGULAR:
77 case IBMBIDI_NUMERAL_HINDICONTEXT:
78 case IBMBIDI_NUMERAL_PERSIANCONTEXT:
79 for (i = 0; i < aSize; i++)
80 aBuffer[i] = HandleNumberInChar(
81 aBuffer[i], !!(i > 0 ? aBuffer[i - 1] : 0), aNumFlag);
82 break;
83 case IBMBIDI_NUMERAL_NOMINAL:
84 default:
85 break;
86 }
87 return NS_OK;
88 }
89