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1 // Copyright 2016 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #include "content/browser/hyphenation/hyphenation_impl.h" | |
6 | |
7 #include <algorithm> | |
8 #include <map> | |
9 #include <utility> | |
10 | |
11 #include "base/files/file.h" | |
12 #include "base/files/file_path.h" | |
13 #include "base/strings/stringprintf.h" | |
14 #include "mojo/public/cpp/system/platform_handle.h" | |
15 | |
16 #if defined(HYPHENATION_DIR_HOME_FOR_TEST) | |
17 #include "base/base_paths.h" | |
18 #include "base/path_service.h" | |
19 #endif | |
20 | |
21 namespace { | |
22 | |
23 using DictionaryFileMap = std::unordered_map<std::string, base::File>; | |
24 | |
25 static bool IsValidLocale(const std::string& locale) { | |
26 return std::all_of(locale.cbegin(), locale.cend(), | |
27 [](const char ch) { return isalpha(ch) || ch == '-'; }); | |
28 } | |
29 | |
30 static base::File& GetDictionaryFile(const std::string& locale) { | |
31 // Keep Files open in the cache for subsequent calls. | |
32 CR_DEFINE_STATIC_LOCAL(DictionaryFileMap, cache, ()); | |
33 | |
34 // TODO(kojii): Replace find+insert with emplace()+std::piecewise_construct | |
35 // when std::map::emplace() is fully supported on all configurations. | |
36 const auto& it = cache.find(locale); | |
37 if (it != cache.end()) | |
38 return it->second; | |
39 base::File file_on_stack; | |
40 const auto& inserted = cache.insert( | |
41 std::make_pair(locale, std::move(file_on_stack))); | |
42 base::File& file = inserted.first->second; | |
43 DCHECK(!file.IsValid()); | |
44 | |
45 // Only ISO lang code is accepted. | |
jam
2016/07/12 14:51:12
don't we want to check this and early exit before
| |
46 if (!IsValidLocale(locale)) | |
47 return file; | |
48 | |
49 #if defined(HYPHENATION_DIR_HOME_FOR_TEST) | |
jam
2016/07/12 14:51:12
normally this is done by adding a command line fla
kojii
2016/07/12 17:32:21
This is really for dev/testing on other platforms
| |
50 base::FilePath dir; | |
51 if (!base::PathService::Get(base::DIR_HOME, &dir)) | |
52 return file; | |
jam
2016/07/12 14:51:12
here as well, don't we only want to put valid path
| |
53 #elif defined(OS_ANDROID) | |
54 base::FilePath dir("/system/usr/hyphen-data"); | |
55 #else | |
56 #error "This configuration is not supported." | |
57 #endif | |
58 std::string filename = base::StringPrintf("hyph-%s.hyb", locale.c_str()); | |
59 base::FilePath path = dir.AppendASCII(filename); | |
60 file.Initialize(path, base::File::FLAG_OPEN | base::File::FLAG_READ); | |
61 return file; | |
62 } | |
63 | |
64 } // namespace | |
65 | |
66 namespace hyphenation { | |
67 | |
68 HyphenationImpl::HyphenationImpl(blink::mojom::HyphenationRequest request) | |
69 : binding_(this, std::move(request)) {} | |
70 | |
71 HyphenationImpl::~HyphenationImpl() {} | |
72 | |
73 // static | |
74 void HyphenationImpl::Create(blink::mojom::HyphenationRequest request) { | |
75 new HyphenationImpl(std::move(request)); | |
76 } | |
77 | |
78 void HyphenationImpl::OpenDictionary(const mojo::String& locale, | |
79 const OpenDictionaryCallback& callback) { | |
80 mojo::ScopedHandle handle; | |
81 base::File& file = GetDictionaryFile(locale); | |
82 if (file.IsValid()) | |
83 handle = mojo::WrapPlatformFile(file.Duplicate().TakePlatformFile()); | |
84 callback.Run(std::move(handle)); | |
85 } | |
86 | |
87 } // namespace hyphenation | |
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