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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.
104 lines
2.7 KiB
C++
104 lines
2.7 KiB
C++
/*
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* Copyright (c) 2023, Maciej <sppmacd@pm.me>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibMarkdown/SyntaxHighlighter.h>
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namespace Markdown {
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Syntax::Language SyntaxHighlighter::language() const
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{
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return Syntax::Language::Markdown;
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}
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Optional<StringView> SyntaxHighlighter::comment_prefix() const
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{
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return {};
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}
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Optional<StringView> SyntaxHighlighter::comment_suffix() const
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{
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return {};
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}
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enum class Token {
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Default,
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Header,
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Code
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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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Vector<Syntax::TextDocumentSpan> spans;
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auto append_header = [&](Syntax::TextRange const& range) {
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Gfx::TextAttributes attributes;
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attributes.color = palette.base_text();
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attributes.bold = true;
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Syntax::TextDocumentSpan span {
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.range = range,
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.attributes = attributes,
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.data = static_cast<u32>(Token::Header),
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.is_skippable = false
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};
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spans.append(span);
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};
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auto append_code_block = [&](Syntax::TextRange const& range) {
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Gfx::TextAttributes attributes;
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attributes.color = palette.syntax_string();
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Syntax::TextDocumentSpan span {
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.range = range,
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.attributes = attributes,
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.data = static_cast<u32>(Token::Code),
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.is_skippable = false
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};
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spans.append(span);
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};
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// Headers, code blocks
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{
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size_t line_index = 0;
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Optional<size_t> code_block_start;
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for (auto const& line : StringView(text).lines()) {
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if (line.starts_with("```"sv)) {
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if (code_block_start.has_value()) {
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append_code_block({ { *code_block_start, 0 }, { line_index, line.length() } });
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code_block_start = {};
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} else {
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code_block_start = line_index;
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}
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}
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if (!code_block_start.has_value()) {
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auto trimmed = line.trim_whitespace(TrimMode::Left);
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size_t indent = line.length() - trimmed.length();
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if (indent < 4 && trimmed.starts_with("#"sv)) {
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append_header({ { line_index, 0 }, { line_index, line.length() } });
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}
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}
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line_index++;
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}
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}
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// TODO: Highlight text nodes (em, strong, link, image)
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m_client->do_set_spans(spans);
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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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return {};
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}
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bool SyntaxHighlighter::token_types_equal(u64 lhs, u64 rhs) const
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{
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return static_cast<Token>(lhs) == static_cast<Token>(rhs);
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}
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}
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