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
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
|
// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/on_device_translation/language_pack_util.h"
#include <string_view>
#include "base/containers/fixed_flat_map.h"
#include "base/strings/strcat.h"
namespace on_device_translation {
namespace {
constexpr char kPrefNamePrefix[] =
"on_device_translation.translate_kit_packages.";
constexpr char kComponentPathPrefNameSuffix[] = "_path";
constexpr char kRegisteredFlagPrefNameSuffix[] = "_registered";
// Currently we always translate via English, so the number of
// SupportedLanguages needs to include English in addition to all the
// LanguagePackKeys.
static_assert(static_cast<unsigned>(SupportedLanguage::kMaxValue) ==
static_cast<unsigned>(LanguagePackKey::kMaxValue) + 1,
"Missmatching SupportedLanguage size and LanguagePackKey size");
// Map from `SupportedLanguage` to the language code.
inline constexpr auto kSupportedLanguageCodeMap = base::MakeFixedFlatMap<
SupportedLanguage,
std::string_view>(
{{SupportedLanguage::kEn, "en"}, {SupportedLanguage::kEs, "es"},
{SupportedLanguage::kJa, "ja"}, {SupportedLanguage::kAr, "ar"},
{SupportedLanguage::kBn, "bn"}, {SupportedLanguage::kDe, "de"},
{SupportedLanguage::kFr, "fr"}, {SupportedLanguage::kHi, "hi"},
{SupportedLanguage::kIt, "it"}, {SupportedLanguage::kKo, "ko"},
{SupportedLanguage::kNl, "nl"}, {SupportedLanguage::kPl, "pl"},
{SupportedLanguage::kPt, "pt"}, {SupportedLanguage::kRu, "ru"},
{SupportedLanguage::kTh, "th"}, {SupportedLanguage::kTr, "tr"},
{SupportedLanguage::kVi, "vi"}, {SupportedLanguage::kZh, "zh"},
{SupportedLanguage::kZhHant, "zh-Hant"}, {SupportedLanguage::kBg, "bg"},
{SupportedLanguage::kCs, "cs"}, {SupportedLanguage::kDa, "da"},
{SupportedLanguage::kEl, "el"}, {SupportedLanguage::kFi, "fi"},
{SupportedLanguage::kHr, "hr"}, {SupportedLanguage::kHu, "hu"},
{SupportedLanguage::kId, "id"}, {SupportedLanguage::kIw, "iw"},
{SupportedLanguage::kLt, "lt"}, {SupportedLanguage::kNo, "no"},
{SupportedLanguage::kRo, "ro"}, {SupportedLanguage::kSk, "sk"},
{SupportedLanguage::kSl, "sl"}, {SupportedLanguage::kSv, "sv"},
{SupportedLanguage::kUk, "uk"}, {SupportedLanguage::kKn, "kn"},
{SupportedLanguage::kTa, "ta"}, {SupportedLanguage::kTe, "te"},
{SupportedLanguage::kMr, "mr"}});
static_assert(std::size(kSupportedLanguageCodeMap) ==
static_cast<unsigned>(SupportedLanguage::kMaxValue) + 1,
"All languages must be in kSupportedLanguageCodeMap.");
// Returns the language pair for a non-English supported language. The order of
// the language pair is determined by the language code's alphabetical order.
inline std::pair<SupportedLanguage, SupportedLanguage>
SupportedLanguagePairFromNonEnglishSupportedLanguage(
SupportedLanguage supported_language) {
CHECK_NE(supported_language, SupportedLanguage::kEn);
if (kSupportedLanguageCodeMap.at(supported_language) < "en") {
return std::make_pair(supported_language, SupportedLanguage::kEn);
} else {
return std::make_pair(SupportedLanguage::kEn, supported_language);
}
}
// The inverse of kSupportedLanguageCodeMap.
inline constexpr auto kSupportedLanguageCodeInverseMap = base::MakeFixedFlatMap<
std::string_view,
SupportedLanguage>(
{{"en", SupportedLanguage::kEn}, {"es", SupportedLanguage::kEs},
{"ja", SupportedLanguage::kJa}, {"ar", SupportedLanguage::kAr},
{"bn", SupportedLanguage::kBn}, {"de", SupportedLanguage::kDe},
{"fr", SupportedLanguage::kFr}, {"hi", SupportedLanguage::kHi},
{"it", SupportedLanguage::kIt}, {"ko", SupportedLanguage::kKo},
{"nl", SupportedLanguage::kNl}, {"pl", SupportedLanguage::kPl},
{"pt", SupportedLanguage::kPt}, {"ru", SupportedLanguage::kRu},
{"th", SupportedLanguage::kTh}, {"tr", SupportedLanguage::kTr},
{"vi", SupportedLanguage::kVi}, {"zh", SupportedLanguage::kZh},
{"zh-Hant", SupportedLanguage::kZhHant}, {"bg", SupportedLanguage::kBg},
{"cs", SupportedLanguage::kCs}, {"da", SupportedLanguage::kDa},
{"el", SupportedLanguage::kEl}, {"fi", SupportedLanguage::kFi},
{"hr", SupportedLanguage::kHr}, {"hu", SupportedLanguage::kHu},
{"id", SupportedLanguage::kId}, {"iw", SupportedLanguage::kIw},
{"lt", SupportedLanguage::kLt}, {"no", SupportedLanguage::kNo},
{"ro", SupportedLanguage::kRo}, {"sk", SupportedLanguage::kSk},
{"sl", SupportedLanguage::kSl}, {"sv", SupportedLanguage::kSv},
{"uk", SupportedLanguage::kUk}, {"kn", SupportedLanguage::kKn},
{"ta", SupportedLanguage::kTa}, {"te", SupportedLanguage::kTe},
{"mr", SupportedLanguage::kMr}});
static_assert(std::size(kSupportedLanguageCodeInverseMap) ==
static_cast<unsigned>(SupportedLanguage::kMaxValue) + 1,
"All languages must be in kSupportedLanguageCodeInverseMap.");
LanguagePackKey LanguagePackKeyFromNonEnglishSupportedLanguage(
SupportedLanguage supported_language) {
CHECK_NE(supported_language, SupportedLanguage::kEn);
return static_cast<LanguagePackKey>(
static_cast<unsigned>(supported_language) - 1);
}
} // namespace
// Converts a SupportedLanguage to a language code.
std::string_view ToLanguageCode(SupportedLanguage supported_language) {
return kSupportedLanguageCodeMap.at(supported_language);
}
// Converts a language code to a SupportedLanguage.
std::optional<SupportedLanguage> ToSupportedLanguage(
std::string_view language_code) {
auto it = kSupportedLanguageCodeInverseMap.find(language_code);
if (it != kSupportedLanguageCodeInverseMap.end()) {
return it->second;
}
return std::nullopt;
}
SupportedLanguage NonEnglishSupportedLanguageFromLanguagePackKey(
LanguagePackKey language_pack_key) {
return static_cast<SupportedLanguage>(
static_cast<unsigned>(language_pack_key) + 1);
}
std::string GetComponentPathPrefName(
const LanguagePackComponentConfig& config) {
return base::StrCat({kPrefNamePrefix, ToLanguageCode(config.language1), "_",
ToLanguageCode(config.language2),
kComponentPathPrefNameSuffix});
}
std::string GetRegisteredFlagPrefName(
const LanguagePackComponentConfig& config) {
return base::StrCat({kPrefNamePrefix, ToLanguageCode(config.language1), "_",
ToLanguageCode(config.language2),
kRegisteredFlagPrefNameSuffix});
}
// Returns the config for a language pack component.
const LanguagePackComponentConfig& GetLanguagePackComponentConfig(
LanguagePackKey key) {
return *kLanguagePackComponentConfigMap.at(key);
}
// Calculates the required language packs for a translation from source_lang to
// target_lang.
// Note: Currently, this method is implemented assuming that translation between
// non-English languages is done by first translating to English. This logic
// needs to be updated when direct translation between non-English languages is
// supported by the library.
std::set<LanguagePackKey> CalculateRequiredLanguagePacks(
const std::string& source_lang,
const std::string& target_lang) {
auto source_lang_code = ToSupportedLanguage(source_lang);
auto target_lang_code = ToSupportedLanguage(target_lang);
if (!source_lang_code.has_value() || !target_lang_code.has_value() ||
source_lang_code == target_lang_code) {
return {};
}
if (*source_lang_code == SupportedLanguage::kEn) {
return {LanguagePackKeyFromNonEnglishSupportedLanguage(*target_lang_code)};
}
if (*target_lang_code == SupportedLanguage::kEn) {
return {LanguagePackKeyFromNonEnglishSupportedLanguage(*source_lang_code)};
}
return {LanguagePackKeyFromNonEnglishSupportedLanguage(*source_lang_code),
LanguagePackKeyFromNonEnglishSupportedLanguage(*target_lang_code)};
}
std::string GetPackageInstallDirName(LanguagePackKey language_pack_key) {
const auto supported_language =
NonEnglishSupportedLanguageFromLanguagePackKey(language_pack_key);
const auto lang_pair =
SupportedLanguagePairFromNonEnglishSupportedLanguage(supported_language);
return base::StrCat(
{ToLanguageCode(lang_pair.first), "_", ToLanguageCode(lang_pair.second)});
}
std::string GetPackageNameSuffix(LanguagePackKey language_pack_key) {
const auto supported_language =
NonEnglishSupportedLanguageFromLanguagePackKey(language_pack_key);
const auto lang_pair =
SupportedLanguagePairFromNonEnglishSupportedLanguage(supported_language);
return base::StrCat(
{ToLanguageCode(lang_pair.first), "-", ToLanguageCode(lang_pair.second)});
}
std::vector<std::string> GetPackageInstallSubDirNamesForVerification(
LanguagePackKey language_pack_key) {
const auto supported_language =
NonEnglishSupportedLanguageFromLanguagePackKey(language_pack_key);
const auto lang_pair =
SupportedLanguagePairFromNonEnglishSupportedLanguage(supported_language);
return {
base::StrCat({ToLanguageCode(lang_pair.first), "_",
ToLanguageCode(lang_pair.second), "_dictionary"}),
base::StrCat({ToLanguageCode(lang_pair.first), "_",
ToLanguageCode(lang_pair.second), "_nmt"}),
base::StrCat({ToLanguageCode(lang_pair.second), "_",
ToLanguageCode(lang_pair.first), "_nmt"}),
};
}
std::string_view GetSourceLanguageCode(LanguagePackKey language_pack_key) {
const SupportedLanguage supported_language =
NonEnglishSupportedLanguageFromLanguagePackKey(language_pack_key);
const auto [source_lang, _] =
SupportedLanguagePairFromNonEnglishSupportedLanguage(supported_language);
return ToLanguageCode(source_lang);
}
std::string_view GetTargetLanguageCode(LanguagePackKey language_pack_key) {
const SupportedLanguage supported_language =
NonEnglishSupportedLanguageFromLanguagePackKey(language_pack_key);
const auto [_, target_lang] =
SupportedLanguagePairFromNonEnglishSupportedLanguage(supported_language);
return ToLanguageCode(target_lang);
}
} // namespace on_device_translation
|
