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LibDiff: Add Diff::write_normal for outputting normal hunks
In order to extract duplicated code between browser and the diff utility.
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2 changed files with 66 additions and 2 deletions
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@ -1,11 +1,14 @@
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/*
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* Copyright (c) 2020, Itamar S. <itamar8910@gmail.com>
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* Copyright (c) 2021, Mustafa Quraish <mustafa@serenityos.org>
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* Copyright (c) 2023, Shannon Booth <shannon.ml.booth@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include "Format.h"
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#include <AK/DeprecatedString.h>
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#include <AK/Stream.h>
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#include <AK/StringBuilder.h>
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#include <AK/Vector.h>
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@ -20,4 +23,53 @@ DeprecatedString generate_only_additions(StringView text)
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}
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return builder.to_deprecated_string();
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}
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};
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ErrorOr<void> write_normal(Hunk const& hunk, Stream& stream, ColorOutput color_output)
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{
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auto original_start = hunk.original_start_line;
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auto target_start = hunk.target_start_line;
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auto num_added = hunk.added_lines.size();
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auto num_removed = hunk.removed_lines.size();
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// Source line(s)
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TRY(stream.write_formatted("{}", original_start));
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if (num_removed > 1)
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TRY(stream.write_formatted(",{}", original_start + num_removed - 1));
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// Action
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if (num_added > 0 && num_removed > 0)
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TRY(stream.write_formatted("c"));
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else if (num_added > 0)
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TRY(stream.write_formatted("a"));
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else
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TRY(stream.write_formatted("d"));
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// Target line(s)
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TRY(stream.write_formatted("{}", target_start));
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if (num_added > 1)
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TRY(stream.write_formatted(",{}", target_start + num_added - 1));
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TRY(stream.write_formatted("\n"));
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for (auto const& line : hunk.removed_lines) {
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if (color_output == ColorOutput::Yes)
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TRY(stream.write_formatted("\033[31;1m< {}\033[0m\n", line));
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else
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TRY(stream.write_formatted("< {}\n", line));
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}
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if (num_added > 0 && num_removed > 0)
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TRY(stream.write_formatted("---\n"));
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for (auto const& line : hunk.added_lines) {
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if (color_output == ColorOutput::Yes)
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TRY(stream.write_formatted("\033[32;1m> {}\033[0m\n", line));
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else
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TRY(stream.write_formatted("> {}\n", line));
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}
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return {};
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}
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}
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