68 lines
1.6 KiB
C++
68 lines
1.6 KiB
C++
/*++
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Copyright (c) Microsoft Corporation
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Licensed under the MIT license.
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Module Name:
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- UnicodeStorage.hpp
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Abstract:
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- dynamic storage location for glyphs that can't normally fit in the output buffer
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Author(s):
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- Austin Diviness (AustDi) 02-May-2018
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--*/
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#pragma once
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#include <vector>
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#include <unordered_map>
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#include <climits>
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// std::unordered_map needs help to know how to hash a COORD
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namespace std
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{
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template<>
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struct hash<COORD>
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{
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// Routine Description:
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// - hashes a coord. coord will be hashed by storing the x and y values consecutively in the lower
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// bits of a size_t.
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// Arguments:
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// - coord - the coord to hash
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// Return Value:
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// - the hashed coord
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constexpr size_t operator()(const COORD& coord) const noexcept
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{
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size_t retVal = coord.Y;
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const size_t xCoord = coord.X;
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retVal |= xCoord << (sizeof(coord.Y) * CHAR_BIT);
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return retVal;
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}
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};
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}
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class UnicodeStorage final
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{
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public:
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using key_type = typename COORD;
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using mapped_type = typename std::vector<wchar_t>;
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UnicodeStorage();
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const mapped_type& GetText(const key_type key) const;
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void StoreGlyph(const key_type key, const mapped_type& glyph);
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void Erase(const key_type key) noexcept;
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void Remap(const std::map<SHORT, SHORT>& rowMap, const std::optional<SHORT> width);
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private:
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std::unordered_map<key_type, mapped_type> _map;
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#ifdef UNIT_TESTING
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friend class UnicodeStorageTests;
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friend class TextBufferTests;
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#endif
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};
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