terminal/src/buffer/out/OutputCellView.hpp
Chester Liu 37e0614554
Optimize hot path in textBufferCellIterator (#10621)
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## Summary of the Pull Request

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## References

The `+=` operator is an extremely hot path under heavily output load. This PR aims to optimize its speed.

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## PR Checklist
* [ ] Supports #10563
* [ ] CLA signed. If not, go over [here](https://cla.opensource.microsoft.com/microsoft/Terminal) and sign the CLA
* [ ] Tests added/passed
* [ ] Documentation updated. If checked, please file a pull request on [our docs repo](https://github.com/MicrosoftDocs/terminal) and link it here: #xxx
* [ ] Schema updated.
* [ ] I've discussed this with core contributors already. If not checked, I'm ready to accept this work might be rejected in favor of a different grand plan. Issue number where discussion took place: #xxx

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## Detailed Description of the Pull Request / Additional comments

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2021-07-27 15:09:56 +00:00

63 lines
1.6 KiB
C++

/*++
Copyright (c) Microsoft Corporation
Licensed under the MIT license.
Module Name:
- OutputCellView.hpp
Abstract:
- Read view into a single cell of data that someone is attempting to write into the output buffer.
- This is done for performance reasons (avoid heap allocs and copies).
Author:
- Michael Niksa (MiNiksa) 06-Oct-2018
Revision History:
- Based on work from OutputCell.hpp/cpp by Austin Diviness (AustDi)
--*/
#pragma once
#include "DbcsAttribute.hpp"
#include "TextAttribute.hpp"
class OutputCellView
{
public:
OutputCellView(const std::wstring_view view,
const DbcsAttribute dbcsAttr,
const TextAttribute textAttr,
const TextAttributeBehavior behavior) noexcept;
const std::wstring_view& Chars() const noexcept;
size_t Columns() const noexcept;
DbcsAttribute DbcsAttr() const noexcept;
TextAttribute TextAttr() const noexcept;
TextAttributeBehavior TextAttrBehavior() const noexcept;
void UpdateText(const std::wstring_view& view) noexcept
{
_view = view;
};
void UpdateDbcsAttribute(const DbcsAttribute& dbcsAttr) noexcept
{
_dbcsAttr = dbcsAttr;
}
void UpdateTextAttribute(const TextAttribute& textAttr) noexcept
{
_textAttr = textAttr;
}
bool operator==(const OutputCellView& view) const noexcept;
bool operator!=(const OutputCellView& view) const noexcept;
private:
std::wstring_view _view;
DbcsAttribute _dbcsAttr;
TextAttribute _textAttr;
TextAttributeBehavior _behavior;
};