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102 lines
3.7 KiB
C++
102 lines
3.7 KiB
C++
/*
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* Copyright (c) 2020-2022, 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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#include <AK/Debug.h>
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#include <LibCpp/Lexer.h>
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#include <LibCpp/SyntaxHighlighter.h>
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#include <LibGUI/TextEditor.h>
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#include <LibGfx/Font/Font.h>
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#include <LibGfx/Palette.h>
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namespace Cpp {
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static Syntax::TextStyle style_for_token_type(Gfx::Palette const& palette, Cpp::Token::Type type)
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{
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switch (type) {
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case Cpp::Token::Type::Keyword:
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return { palette.syntax_keyword(), true };
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case Cpp::Token::Type::KnownType:
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return { palette.syntax_type(), true };
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case Cpp::Token::Type::Identifier:
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return { palette.syntax_identifier(), false };
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case Cpp::Token::Type::DoubleQuotedString:
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case Cpp::Token::Type::SingleQuotedString:
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case Cpp::Token::Type::RawString:
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return { palette.syntax_string(), false };
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case Cpp::Token::Type::Integer:
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case Cpp::Token::Type::Float:
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return { palette.syntax_number(), false };
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case Cpp::Token::Type::IncludePath:
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return { palette.syntax_preprocessor_value(), false };
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case Cpp::Token::Type::EscapeSequence:
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return { palette.syntax_keyword(), true };
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case Cpp::Token::Type::PreprocessorStatement:
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case Cpp::Token::Type::IncludeStatement:
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return { palette.syntax_preprocessor_statement(), false };
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case Cpp::Token::Type::Comment:
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return { palette.syntax_comment(), false };
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default:
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return { palette.base_text(), false };
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}
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}
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bool SyntaxHighlighter::is_identifier(u64 token) const
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{
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auto cpp_token = static_cast<Cpp::Token::Type>(token);
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return cpp_token == Cpp::Token::Type::Identifier;
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}
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bool SyntaxHighlighter::is_navigatable(u64 token) const
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{
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auto cpp_token = static_cast<Cpp::Token::Type>(token);
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return cpp_token == Cpp::Token::Type::IncludePath;
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}
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void SyntaxHighlighter::rehighlight(Palette const& palette)
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{
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auto text = m_client->get_text();
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Cpp::Lexer lexer(text);
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Vector<GUI::TextDocumentSpan> spans;
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lexer.lex_iterable([&](auto token) {
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// FIXME: The +1 for the token end column is a quick hack due to not wanting to modify the lexer (which is also used by the parser). Maybe there's a better way to do this.
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dbgln_if(SYNTAX_HIGHLIGHTING_DEBUG, "{} @ {}:{} - {}:{}", token.type_as_string(), token.start().line, token.start().column, token.end().line, token.end().column + 1);
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GUI::TextDocumentSpan span;
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span.range.set_start({ token.start().line, token.start().column });
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span.range.set_end({ token.end().line, token.end().column + 1 });
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auto style = style_for_token_type(palette, token.type());
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span.attributes.color = style.color;
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span.attributes.bold = style.bold;
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span.is_skippable = token.type() == Cpp::Token::Type::Whitespace;
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span.data = static_cast<u64>(token.type());
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spans.append(span);
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});
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m_client->do_set_spans(move(spans));
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m_has_brace_buddies = false;
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highlight_matching_token_pair();
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m_client->do_update();
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}
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Vector<SyntaxHighlighter::MatchingTokenPair> SyntaxHighlighter::matching_token_pairs_impl() const
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{
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static Vector<SyntaxHighlighter::MatchingTokenPair> pairs;
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if (pairs.is_empty()) {
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pairs.append({ static_cast<u64>(Cpp::Token::Type::LeftCurly), static_cast<u64>(Cpp::Token::Type::RightCurly) });
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pairs.append({ static_cast<u64>(Cpp::Token::Type::LeftParen), static_cast<u64>(Cpp::Token::Type::RightParen) });
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pairs.append({ static_cast<u64>(Cpp::Token::Type::LeftBracket), static_cast<u64>(Cpp::Token::Type::RightBracket) });
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}
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return pairs;
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}
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bool SyntaxHighlighter::token_types_equal(u64 token1, u64 token2) const
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{
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return static_cast<Cpp::Token::Type>(token1) == static_cast<Cpp::Token::Type>(token2);
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}
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}
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