1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
|
/* 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/. */
#ifdef MOZILLA_INTERNAL_API
# include "mozilla/Assertions.h"
# include "mozilla/UniquePtr.h"
# include "ICUUtils.h"
# include "mozilla/ClearOnShutdown.h"
# include "mozilla/StaticPrefs_dom.h"
# include "mozilla/intl/LocaleService.h"
# include "mozilla/intl/FormatBuffer.h"
# include "mozilla/intl/NumberFormat.h"
# include "mozilla/intl/NumberParser.h"
# include "nsIContent.h"
# include "mozilla/dom/Document.h"
# include "nsString.h"
using namespace mozilla;
using mozilla::intl::LocaleService;
already_AddRefed<nsAtom> ICUUtils::LanguageTagIterForContent::GetNext() {
if (mCurrentFallbackIndex < 0) {
mCurrentFallbackIndex = 0;
// Try the language specified by a 'lang'/'xml:lang' attribute on mContent
// or any ancestor, if such an attribute is specified:
if (auto* lang = mContent->GetLang()) {
return do_AddRef(lang);
}
}
if (mCurrentFallbackIndex < 1) {
mCurrentFallbackIndex = 1;
// Else try the language specified by any Content-Language HTTP header or
// pragma directive:
if (nsAtom* lang = mContent->OwnerDoc()->GetContentLanguage()) {
return do_AddRef(lang);
}
}
if (mCurrentFallbackIndex < 2) {
mCurrentFallbackIndex = 2;
// Else take the app's locale (or en-US, if spoof English applies):
if (mContent->OwnerDoc()->ShouldResistFingerprinting(RFPTarget::JSLocale)) {
return NS_Atomize("en-US");
}
nsAutoCString appLocale;
LocaleService::GetInstance()->GetAppLocaleAsBCP47(appLocale);
return NS_Atomize(appLocale);
}
// TODO: Probably not worth it, but maybe have a fourth fallback to using
// the OS locale?
return nullptr;
}
/* static */
bool ICUUtils::LocalizeNumber(double aValue,
LanguageTagIterForContent& aLangTags,
nsAString& aLocalizedValue) {
MOZ_ASSERT(aLangTags.IsAtStart(), "Don't call Next() before passing");
MOZ_ASSERT(NS_IsMainThread());
using LangToFormatterCache =
nsTHashMap<RefPtr<nsAtom>, UniquePtr<intl::NumberFormat>>;
static StaticAutoPtr<LangToFormatterCache> sCache;
if (!sCache) {
sCache = new LangToFormatterCache();
ClearOnShutdown(&sCache);
}
intl::NumberFormatOptions options;
if (StaticPrefs::dom_forms_number_grouping()) {
options.mGrouping = intl::NumberFormatOptions::Grouping::Always;
} else {
options.mGrouping = intl::NumberFormatOptions::Grouping::Never;
}
// ICU default is a maximum of 3 significant fractional digits. We don't
// want that limit, so we set it to the maximum that a double can represent
// (14-16 decimal fractional digits).
options.mFractionDigits = Some(std::make_pair(0, 16));
while (RefPtr<nsAtom> langTag = aLangTags.GetNext()) {
auto& formatter = sCache->LookupOrInsertWith(langTag, [&] {
nsAutoCString tag;
langTag->ToUTF8String(tag);
return intl::NumberFormat::TryCreate(tag, options).unwrapOr(nullptr);
});
if (!formatter) {
continue;
}
intl::nsTStringToBufferAdapter adapter(aLocalizedValue);
if (formatter->format(aValue, adapter).isOk()) {
return true;
}
}
return false;
}
/* static */
double ICUUtils::ParseNumber(const nsAString& aValue,
LanguageTagIterForContent& aLangTags) {
MOZ_ASSERT(aLangTags.IsAtStart(), "Don't call Next() before passing");
using LangToParserCache =
nsTHashMap<RefPtr<nsAtom>, UniquePtr<intl::NumberParser>>;
static StaticAutoPtr<LangToParserCache> sCache;
if (aValue.IsEmpty()) {
return std::numeric_limits<float>::quiet_NaN();
}
if (!sCache) {
sCache = new LangToParserCache();
ClearOnShutdown(&sCache);
}
const Span<const char16_t> value(aValue.BeginReading(), aValue.Length());
while (RefPtr<nsAtom> langTag = aLangTags.GetNext()) {
auto& parser = sCache->LookupOrInsertWith(langTag, [&] {
nsAutoCString tag;
langTag->ToUTF8String(tag);
return intl::NumberParser::TryCreate(
tag.get(), StaticPrefs::dom_forms_number_grouping())
.unwrapOr(nullptr);
});
if (!parser) {
continue;
}
static_assert(sizeof(UChar) == 2 && sizeof(nsAString::char_type) == 2,
"Unexpected character size - the following cast is unsafe");
auto parseResult = parser->ParseDouble(value);
if (!parseResult.isOk()) {
continue;
}
std::pair<double, int32_t> parsed = parseResult.unwrap();
if (parsed.second == static_cast<int32_t>(value.Length())) {
return parsed.first;
}
}
return std::numeric_limits<float>::quiet_NaN();
}
/* static */
void ICUUtils::AssignUCharArrayToString(UChar* aICUString, int32_t aLength,
nsAString& aMozString) {
// Both ICU's UnicodeString and Mozilla's nsAString use UTF-16, so we can
// cast here.
static_assert(sizeof(UChar) == 2 && sizeof(nsAString::char_type) == 2,
"Unexpected character size - the following cast is unsafe");
aMozString.Assign((const nsAString::char_type*)aICUString, aLength);
NS_ASSERTION((int32_t)aMozString.Length() == aLength, "Conversion failed");
}
/* static */
nsresult ICUUtils::ICUErrorToNsResult(const intl::ICUError aError) {
switch (aError) {
case intl::ICUError::OutOfMemory:
return NS_ERROR_OUT_OF_MEMORY;
default:
return NS_ERROR_FAILURE;
}
}
#endif /* MOZILLA_INTERNAL_API */
|
