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LibGUI: Add folding regions to INI syntax highlighter

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This lets you fold sections into a single line. We attempt to keep 1
blank line after the folded section if possible.
This commit is contained in:
Sam Atkins 2023-03-03 17:09:32 +00:00 • committed by Andreas Kling
parent 4536b80a62
commit 1c0c59eabe
1 changed files with 35 additions and 0 deletions
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35
Userland/Libraries/LibGUI/INISyntaxHighlighter.cpp
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@ -43,6 +43,10 @@ void IniSyntaxHighlighter::rehighlight(Palette const& palette)
IniLexer lexer(text);
auto tokens = lexer.lex();
Optional<IniToken> previous_section_token;
IniToken previous_token;
Vector<TextDocumentFoldingRegion> folding_regions;
Vector<GUI::TextDocumentSpan> spans;
for (auto& token : tokens) {
GUI::TextDocumentSpan span;
@ -54,8 +58,39 @@ void IniSyntaxHighlighter::rehighlight(Palette const& palette)
span.is_skippable = token.m_type == IniToken::Type::Whitespace;
span.data = static_cast<u64>(token.m_type);
spans.append(span);
if (token.m_type == IniToken::Type::RightBracket && previous_token.m_type == IniToken::Type::Section) {
previous_section_token = token;
} else if (token.m_type == IniToken::Type::LeftBracket) {
if (previous_section_token.has_value()) {
TextDocumentFoldingRegion region;
region.range.set_start({ previous_section_token->m_end.line, previous_section_token->m_end.column });
// If possible, leave a blank line between sections.
// `end_line - start_line > 1` means the whitespace contains at least 1 blank line,
// so we can end the region 1 line before the end of that whitespace token.
// (Otherwise, we'd end the region at the start of the line that begins the next section.)
auto end_line = token.m_start.line;
if (previous_token.m_type == IniToken::Type::Whitespace
&& (previous_token.m_end.line - previous_token.m_start.line > 1))
end_line--;
region.range.set_end({ end_line, token.m_start.column });
folding_regions.append(move(region));
}
previous_section_token = token;
}
previous_token = token;
}
if (previous_section_token.has_value()) {
TextDocumentFoldingRegion region;
auto& end_token = tokens.last();
region.range.set_start({ previous_section_token->m_end.line, previous_section_token->m_end.column });
region.range.set_end({ end_token.m_end.line, end_token.m_end.column });
folding_regions.append(move(region));
}
m_client->do_set_spans(move(spans));
m_client->do_set_folding_regions(move(folding_regions));
m_has_brace_buddies = false;
highlight_matching_token_pair();