a8e4bedae3
## Summary of the Pull Request Introduces `til::rle`, a vector-like container which stores elements of type T in a run length encoded format. This allows efficient compaction of repeated elements within the vector. ## References * #8000 - Supports buffer rewrite work. A re-use of `til::rle` will be useful as a column counter as we pursue NxM storage and presentation. * #3075 - The new iterators allow skipping forward by multiple units, which wasn't possible under `TextBuffer-/OutputCellIterator`. Additionally it also allows a bulk insertions. * #8787 and #410 - High probability this should be `pmr`-ified like `bitmap` for things like `chafa` and `cacafire` which are changing the run length frequently. ## PR Checklist * [x] Closes #8741 * [x] I work here. * [x] Tests added. * [x] Tests passed. ## Validation Steps Performed * [x] Ran `cacafire` in `OpenConsole.exe` and it looked beautiful * [x] Ran new suite of `RunLengthEncodingTests.cpp` Co-authored-by: Michael Niksa <miniksa@microsoft.com>
162 lines
4.5 KiB
C++
162 lines
4.5 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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- TextColor.h
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Abstract:
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- contains data for a single color of the text. Text Attributes are composed of
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two of these - one for the foreground and one for the background.
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The color can be in one of three states:
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* Default Colors - The terminal should use the terminal's notion of whatever
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the default color should be for this component.
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It's up to the terminal that's consuming this buffer to control the
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behavior of default attributes.
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Terminals typically have a pair of Default colors that are separate from
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their color table. This component should use that value.
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Consoles also can have a legacy table index as their default colors.
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* Indexed Color - The terminal should use our value as an index into the
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color table to retrieve the real value of the color.
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This is the type of color that "legacy" 16-color attributes have.
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* RGB color - We'll store a real color value in this attribute
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Author(s):
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- Mike Griese (migrie) Nov 2018
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Revision History:
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- From components of output.h/.c
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by Therese Stowell (ThereseS) 1990-1991
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- Pulled into its own file from textBuffer.hpp/cpp (AustDi, 2017)
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- Moved the colors into their own separate abstraction. (migrie Nov 2018)
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--*/
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#pragma once
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#ifdef UNIT_TESTING
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#include "WexTestClass.h"
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#endif
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enum class ColorType : BYTE
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{
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IsIndex256 = 0x0,
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IsIndex16 = 0x1,
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IsDefault = 0x2,
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IsRgb = 0x3
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};
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struct TextColor
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{
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public:
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constexpr TextColor() noexcept :
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_meta{ ColorType::IsDefault },
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_red{ 0 },
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_green{ 0 },
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_blue{ 0 }
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{
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}
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constexpr TextColor(const BYTE index, const bool isIndex256) noexcept :
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_meta{ isIndex256 ? ColorType::IsIndex256 : ColorType::IsIndex16 },
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_index{ index },
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_green{ 0 },
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_blue{ 0 }
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{
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}
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constexpr TextColor(const COLORREF rgb) noexcept :
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_meta{ ColorType::IsRgb },
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_red{ GetRValue(rgb) },
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_green{ GetGValue(rgb) },
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_blue{ GetBValue(rgb) }
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{
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}
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friend constexpr bool operator==(const TextColor& a, const TextColor& b) noexcept;
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friend constexpr bool operator!=(const TextColor& a, const TextColor& b) noexcept;
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bool CanBeBrightened() const noexcept;
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bool IsLegacy() const noexcept;
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bool IsIndex16() const noexcept;
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bool IsIndex256() const noexcept;
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bool IsDefault() const noexcept;
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bool IsRgb() const noexcept;
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void SetColor(const COLORREF rgbColor) noexcept;
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void SetIndex(const BYTE index, const bool isIndex256) noexcept;
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void SetDefault() noexcept;
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COLORREF GetColor(gsl::span<const COLORREF> colorTable,
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const COLORREF defaultColor,
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const bool brighten = false) const noexcept;
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BYTE GetLegacyIndex(const BYTE defaultIndex) const noexcept;
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constexpr BYTE GetIndex() const noexcept
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{
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return _index;
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}
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COLORREF GetRGB() const noexcept;
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private:
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union
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{
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BYTE _red, _index;
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};
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BYTE _green;
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BYTE _blue;
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ColorType _meta;
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#ifdef UNIT_TESTING
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friend class TextBufferTests;
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template<typename TextColor>
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friend class WEX::TestExecution::VerifyOutputTraits;
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#endif
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};
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bool constexpr operator==(const TextColor& a, const TextColor& b) noexcept
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{
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return a._meta == b._meta &&
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a._red == b._red &&
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a._green == b._green &&
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a._blue == b._blue;
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}
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bool constexpr operator!=(const TextColor& a, const TextColor& b) noexcept
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{
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return !(a == b);
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}
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#ifdef UNIT_TESTING
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namespace WEX
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{
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namespace TestExecution
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{
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template<>
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class VerifyOutputTraits<TextColor>
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{
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public:
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static WEX::Common::NoThrowString ToString(const TextColor& color)
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{
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if (color.IsDefault())
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{
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return L"{default}";
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}
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else if (color.IsRgb())
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{
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return WEX::Common::NoThrowString().Format(L"{RGB:0x%06x}", color.GetRGB());
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}
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else
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{
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return WEX::Common::NoThrowString().Format(L"{index:0x%04x}", color._red);
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}
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}
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};
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}
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}
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#endif
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static_assert(sizeof(TextColor) <= 4 * sizeof(BYTE), "We should only need 4B for an entire TextColor. Any more than that is just waste");
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