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https://github.com/LadybirdBrowser/ladybird.git
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41b060be81
We have no need to support normal or context diffs in ladybird, as well as the ability to parse and apply patches.
93 lines
2.2 KiB
C++
93 lines
2.2 KiB
C++
/*
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* Copyright (c) 2020, Itamar S. <itamar8910@gmail.com>
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* Copyright (c) 2023, Shannon Booth <shannon@serenityos.org>
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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/Assertions.h>
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#include <AK/Format.h>
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#include <AK/String.h>
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#include <AK/StringView.h>
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#include <AK/Vector.h>
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namespace Diff {
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struct Range {
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size_t start_line { 0 };
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size_t number_of_lines { 0 };
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};
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struct HunkLocation {
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Range old_range;
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Range new_range;
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};
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struct Line {
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enum class Operation {
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Addition = '+',
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Removal = '-',
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Context = ' ',
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};
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static constexpr Operation operation_from_symbol(char symbol)
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{
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switch (symbol) {
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case '+':
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return Operation::Addition;
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case '-':
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return Operation::Removal;
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case ' ':
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return Operation::Context;
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default:
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VERIFY_NOT_REACHED();
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}
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}
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Operation operation;
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String content;
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};
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struct Hunk {
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HunkLocation location;
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Vector<Line> lines;
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};
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}
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template<>
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struct AK::Formatter<Diff::Line::Operation> : Formatter<FormatString> {
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ErrorOr<void> format(FormatBuilder& builder, Diff::Line::Operation operation)
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{
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return Formatter<FormatString>::format(builder, "{}"sv, static_cast<char>(operation));
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}
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};
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template<>
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struct AK::Formatter<Diff::Line> : Formatter<FormatString> {
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ErrorOr<void> format(FormatBuilder& builder, Diff::Line const& line)
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{
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return Formatter<FormatString>::format(builder, "{}{}"sv, line.operation, line.content);
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}
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};
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template<>
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struct AK::Formatter<Diff::HunkLocation> : Formatter<FormatString> {
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static ErrorOr<void> format(FormatBuilder& format_builder, Diff::HunkLocation const& location)
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{
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auto& builder = format_builder.builder();
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TRY(builder.try_appendff("@@ -{}", location.old_range.start_line));
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if (location.old_range.number_of_lines != 1)
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TRY(builder.try_appendff(",{}", location.old_range.number_of_lines));
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TRY(builder.try_appendff(" +{}", location.new_range.start_line));
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if (location.new_range.number_of_lines != 1)
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TRY(builder.try_appendff(",{}", location.new_range.number_of_lines));
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return builder.try_appendff(" @@");
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}
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};
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