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https://github.com/RGBCube/serenity
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36f0499cc8
This makes using the line editor much nicer when multi-code-point graphemes are present in the input (e.g. flag emojis, or some cjk glyphs), and avoids messing up the buffer when deleting text, or cursoring around.
45 lines
1 KiB
C++
45 lines
1 KiB
C++
/*
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* Copyright (c) 2020-2021, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Types.h>
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#include <AK/Vector.h>
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namespace Line {
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struct StringMetrics {
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struct MaskedChar {
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size_t position { 0 };
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size_t original_length { 0 };
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size_t masked_length { 0 };
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};
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struct LineMetrics {
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Vector<MaskedChar> masked_chars;
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size_t length { 0 };
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size_t visible_length { 0 };
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Optional<size_t> bit_length { 0 };
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size_t total_length() const { return length; }
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};
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Vector<LineMetrics> line_metrics;
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Vector<size_t> grapheme_breaks {};
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size_t total_length { 0 };
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size_t max_line_length { 0 };
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size_t lines_with_addition(StringMetrics const& offset, size_t column_width) const;
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size_t offset_with_addition(StringMetrics const& offset, size_t column_width) const;
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void reset()
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{
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line_metrics.clear();
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total_length = 0;
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max_line_length = 0;
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line_metrics.append({ {}, 0 });
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}
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};
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}
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