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Diffstat (limited to 'platform/default/src/mbgl/text/collator.cpp')
-rw-r--r-- | platform/default/src/mbgl/text/collator.cpp | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/platform/default/src/mbgl/text/collator.cpp b/platform/default/src/mbgl/text/collator.cpp new file mode 100644 index 0000000000..400fa4d94d --- /dev/null +++ b/platform/default/src/mbgl/text/collator.cpp @@ -0,0 +1,79 @@ +#include <mbgl/style/expression/collator.hpp> +#include <mbgl/util/platform.hpp> +#include <libnu/strcoll.h> +#include <mbgl/text/unaccent.hpp> + +/* + The default implementation of Collator ignores locale. + Case sensitivity and collation order are based on + Default Unicode Collation Element Table (DUCET). + + Diacritic-insensitivity is implemented with nunicode's + non-standard "unaccent" functionality, which is tailored + to European languages. + + It would be possible to implement locale awareness using ICU, + but would require bundling locale data. +*/ + +namespace mbgl { +namespace style { +namespace expression { + +class Collator::Impl { +public: + Impl(bool caseSensitive_, bool diacriticSensitive_, optional<std::string>) + : caseSensitive(caseSensitive_) + , diacriticSensitive(diacriticSensitive_) + {} + + bool operator==(const Impl& other) const { + return caseSensitive == other.caseSensitive && + diacriticSensitive == other.diacriticSensitive; + } + + int compare(const std::string& lhs, const std::string& rhs) const { + if (caseSensitive && diacriticSensitive) { + return nu_strcoll(lhs.c_str(), rhs.c_str(), + nu_utf8_read, nu_utf8_read); + } else if (!caseSensitive && diacriticSensitive) { + return nu_strcasecoll(lhs.c_str(), rhs.c_str(), + nu_utf8_read, nu_utf8_read); + } else if (caseSensitive && !diacriticSensitive) { + return nu_strcoll(platform::unaccent(lhs).c_str(), platform::unaccent(rhs).c_str(), + nu_utf8_read, nu_utf8_read); + } else { + return nu_strcasecoll(platform::unaccent(lhs).c_str(), platform::unaccent(rhs).c_str(), + nu_utf8_read, nu_utf8_read); + } + } + + std::string resolvedLocale() const { + return ""; + } +private: + bool caseSensitive; + bool diacriticSensitive; +}; + + +Collator::Collator(bool caseSensitive, bool diacriticSensitive, optional<std::string> locale_) + : impl(std::make_shared<Impl>(caseSensitive, diacriticSensitive, std::move(locale_))) +{} + +bool Collator::operator==(const Collator& other) const { + return *impl == *(other.impl); +} + +int Collator::compare(const std::string& lhs, const std::string& rhs) const { + return impl->compare(lhs, rhs); +} + +std::string Collator::resolvedLocale() const { + return impl->resolvedLocale(); +} + + +} // namespace expression +} // namespace style +} // namespace mbgl |