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/*
* Copyright (c) 2022, Brian Gianforcaro <bgianf@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/CharacterTypes.h>
#include <AK/Vector.h>
#include <LibGUI/GitCommitLexer.h>
namespace GUI {
GitCommitLexer::GitCommitLexer(StringView input)
: m_input(input)
{
}
char GitCommitLexer::peek(size_t offset) const
{
if ((m_index + offset) >= m_input.length())
return 0;
return m_input[m_index + offset];
}
char GitCommitLexer::consume()
{
VERIFY(m_index < m_input.length());
char ch = m_input[m_index++];
if (ch == '\n') {
m_position.line++;
m_position.column = 0;
} else {
m_position.column++;
}
return ch;
}
Vector<GitCommitToken> GitCommitLexer::lex()
{
Vector<GitCommitToken> tokens;
size_t token_start_index = 0;
GitCommitPosition token_start_position;
auto begin_token = [&] {
token_start_index = m_index;
token_start_position = m_position;
};
auto commit_token = [&](auto type) {
GitCommitToken token;
token.m_view = m_input.substring_view(token_start_index, m_index - token_start_index);
token.m_type = type;
token.m_start = token_start_position;
token.m_end = m_position;
tokens.append(token);
};
while (m_index < m_input.length()) {
if (is_ascii_space(peek(0))) {
begin_token();
while (is_ascii_space(peek()))
consume();
continue;
}
// Commit comments
if (peek(0) && peek(0) == '#') {
begin_token();
while (peek() && peek() != '\n')
consume();
commit_token(GitCommitToken::Type::Comment);
continue;
}
consume();
commit_token(GitCommitToken::Type::Unknown);
}
return tokens;
}
}
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