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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#ifndef LANGUAGEBLOCKSDEFS_H_INCLUDED
#define LANGUAGEBLOCKSDEFS_H_INCLUDED
#include <tuple>
#include <string>
#include "System/UnorderedMap.hpp"
#ifndef HEADLESS
// Predefined blocks
// It contains only the most widly used blocks (Latin and Cyrilic)
static const spring::unordered_map<std::string, std::tuple<char32_t, char32_t>> blocks {
{"NULL", std::make_tuple(0x0000, 0x0001)},
{"ASCII", std::make_tuple(0x0020, 0x007F)},
{"Latin-1", std::make_tuple(0x00A1, 0x0100)},
{"Latin-A", std::make_tuple(0x0100, 0x0180)},
{"Latin-B", std::make_tuple(0x0180, 0x0250)},
{"Greek", std::make_tuple(0x0370, 0x0400)},
{"Cyrillic", std::make_tuple(0x0400, 0x0500)},
{"Hebrew", std::make_tuple(0x0590, 0x0600)},
{"Arabic", std::make_tuple(0x0600, 0x0700)},
{"FigureSpace", std::make_tuple(0x2007, 0x2008)}, // used by TextWrap
{"Ellipsis", std::make_tuple(0x2026, 0x2027)}, // ''
};
static const unsigned int undefBlocksSize = 32; // Any other blocks assumed to be 32 size
static bool IsInRange(char32_t ch, std::tuple<char32_t, char32_t>& range)
{
const auto start = std::get<0>(range);
const auto end = std::get<1>(range);
return (ch < end && ch >= start);
}
static char32_t GetUndefLanguageBlock(char32_t ch, char32_t& end)
{
char32_t start = (ch/undefBlocksSize)*undefBlocksSize;
end = start + undefBlocksSize;
return start;
}
static char32_t GetLanguageBlock(char32_t ch, char32_t& end)
{
for (auto it: blocks) {
if (IsInRange(ch, it.second)) {
end = std::get<1>(it.second);
return std::get<0>(it.second);
}
}
return GetUndefLanguageBlock(ch, end);
}
#endif
#endif // LANGUAGEBLOCKSDEFS_H_INCLUDED
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