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ba4db899d4
This moves some stuff around to make LibGUI depend on LibSyntax instead of the other way around, as not every application that wishes to do syntax highlighting is necessarily a LibGUI (or even a GUI) application.
114 lines
4.2 KiB
C++
114 lines
4.2 KiB
C++
/*
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* Copyright (c) 2020, Hüseyin Aslıtürk <asliturk@hotmail.com>
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* Copyright (c) 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 <LibGUI/INILexer.h>
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#include <LibGUI/INISyntaxHighlighter.h>
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#include <LibGfx/Palette.h>
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namespace GUI {
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static Gfx::TextAttributes style_for_token_type(Gfx::Palette const& palette, IniToken::Type type)
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{
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switch (type) {
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case IniToken::Type::LeftBracket:
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case IniToken::Type::RightBracket:
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case IniToken::Type::Section:
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return { palette.syntax_keyword(), {}, true };
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case IniToken::Type::Name:
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return { palette.syntax_identifier() };
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case IniToken::Type::Value:
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return { palette.syntax_string() };
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case IniToken::Type::Comment:
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return { palette.syntax_comment() };
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case IniToken::Type::Equal:
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return { palette.syntax_operator(), {}, true };
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default:
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return { palette.base_text() };
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}
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}
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bool IniSyntaxHighlighter::is_identifier(u64 token) const
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{
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auto ini_token = static_cast<GUI::IniToken::Type>(token);
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return ini_token == GUI::IniToken::Type::Name;
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}
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void IniSyntaxHighlighter::rehighlight(Palette const& palette)
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{
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auto text = m_client->get_text();
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IniLexer lexer(text);
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auto tokens = lexer.lex();
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Optional<IniToken> previous_section_token;
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IniToken previous_token;
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Vector<Syntax::TextDocumentFoldingRegion> folding_regions;
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Vector<Syntax::TextDocumentSpan> spans;
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for (auto& token : tokens) {
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Syntax::TextDocumentSpan span;
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span.range.set_start({ token.m_start.line, token.m_start.column });
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span.range.set_end({ token.m_end.line, token.m_end.column });
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span.attributes = style_for_token_type(palette, token.m_type);
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span.is_skippable = token.m_type == IniToken::Type::Whitespace;
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span.data = static_cast<u64>(token.m_type);
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spans.append(span);
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if (token.m_type == IniToken::Type::RightBracket && previous_token.m_type == IniToken::Type::Section) {
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previous_section_token = token;
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} else if (token.m_type == IniToken::Type::LeftBracket) {
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if (previous_section_token.has_value()) {
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Syntax::TextDocumentFoldingRegion region;
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region.range.set_start({ previous_section_token->m_end.line, previous_section_token->m_end.column });
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// If possible, leave a blank line between sections.
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// `end_line - start_line > 1` means the whitespace contains at least 1 blank line,
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// so we can end the region 1 line before the end of that whitespace token.
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// (Otherwise, we'd end the region at the start of the line that begins the next section.)
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auto end_line = token.m_start.line;
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if (previous_token.m_type == IniToken::Type::Whitespace
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&& (previous_token.m_end.line - previous_token.m_start.line > 1))
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end_line--;
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region.range.set_end({ end_line, token.m_start.column });
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folding_regions.append(move(region));
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}
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previous_section_token = token;
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}
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previous_token = token;
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}
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if (previous_section_token.has_value()) {
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Syntax::TextDocumentFoldingRegion region;
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auto& end_token = tokens.last();
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region.range.set_start({ previous_section_token->m_end.line, previous_section_token->m_end.column });
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region.range.set_end({ end_token.m_end.line, end_token.m_end.column });
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folding_regions.append(move(region));
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}
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m_client->do_set_spans(move(spans));
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m_client->do_set_folding_regions(move(folding_regions));
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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<IniSyntaxHighlighter::MatchingTokenPair> IniSyntaxHighlighter::matching_token_pairs_impl() const
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{
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static Vector<MatchingTokenPair> pairs;
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if (pairs.is_empty()) {
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pairs.append({ static_cast<u64>(IniToken::Type::LeftBracket), static_cast<u64>(IniToken::Type::RightBracket) });
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}
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return pairs;
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}
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bool IniSyntaxHighlighter::token_types_equal(u64 token1, u64 token2) const
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{
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return static_cast<GUI::IniToken::Type>(token1) == static_cast<GUI::IniToken::Type>(token2);
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}
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}
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