diff options
Diffstat (limited to 'platform/preferred_languages.cpp')
-rw-r--r-- | platform/preferred_languages.cpp | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/platform/preferred_languages.cpp b/platform/preferred_languages.cpp new file mode 100644 index 0000000000..130f3fb055 --- /dev/null +++ b/platform/preferred_languages.cpp @@ -0,0 +1,114 @@ +#include "preferred_languages.hpp" + +#include "../base/string_utils.hpp" +#include "../base/logging.hpp" + +#include "../std/target_os.hpp" +#include "../std/set.hpp" + +#if defined(OMIM_OS_MAC) || defined(OMIM_OS_IPHONE) + #include <CoreFoundation/CFLocale.h> + #include <CoreFoundation/CFString.h> + +#elif defined(OMIM_OS_WINDOWS) + // @TODO + +#else + #error "Define language preferences for your platform" + +#endif + +namespace languages +{ + +class LangFilter +{ + set<string> & m_known; +public: + LangFilter(set<string> & known) : m_known(known) {} + bool operator()(string const & t) + { + return !m_known.insert(t).second; + } +}; + +class NormalizeFilter +{ +public: + void operator()(string & t) + { + strings::SimpleTokenizer const iter(t, "-_ "); + if (iter) + t = *iter; + else + { + LOG(LWARNING, ("Invalid language")); + } + } +}; + +void FilterLanguages(vector<string> & langs) +{ + // normalize languages: en-US -> en, ru_RU -> ru etc. + for_each(langs.begin(), langs.end(), NormalizeFilter()); + { // tmp storage + set<string> known; + // remove duplicate languages + langs.erase(remove_if(langs.begin(), langs.end(), LangFilter(known)), langs.end()); + } +} + +void SystemPreferredLanguages(vector<string> & languages) +{ +#if defined(OMIM_OS_MAC) || defined(OMIM_OS_IPHONE) + // Mac and iOS implementation + CFArrayRef langs = CFLocaleCopyPreferredLanguages(); + char buf[30]; + for (CFIndex i = 0; i < CFArrayGetCount(langs); ++i) + { + CFStringRef strRef = (CFStringRef)CFArrayGetValueAtIndex(langs, i); + CFStringGetCString(strRef, buf, 30, kCFStringEncodingUTF8); + languages.push_back(buf); + } + CFRelease(langs); + +#elif defined(OMIM_OS_WINDOWS) + // @TODO Windows implementation +#else + #error "Define language preferences for your platform" +#endif + + FilterLanguages(languages); +} + +string PreferredLanguages() +{ + vector<string> arr; + + SystemPreferredLanguages(arr); + + // generate output string + string result; + for (size_t i = 0; i < arr.size(); ++i) + { + result.append(arr[i]); + result.push_back('|'); + } + if (result.empty()) + result = "default"; + else + result.resize(result.size() - 1); + return result; +} + +string CurrentLanguage() +{ + vector<string> arr; + SystemPreferredLanguages(arr); + if (arr.empty()) + return "en"; + else + return arr[0]; +} + +} |