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https://github.com/LadybirdBrowser/ladybird.git
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5d219ad4f7
This patch adds spacing to give a sense of structure to markdown documents viewed in the terminal. This also makes the content easier to read.
128 lines
3.0 KiB
C++
128 lines
3.0 KiB
C++
/*
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* Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/StringBuilder.h>
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#include <LibJS/MarkupGenerator.h>
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#include <LibMarkdown/CodeBlock.h>
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#include <LibMarkdown/Visitor.h>
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#include <LibRegex/Regex.h>
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namespace Markdown {
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String CodeBlock::render_to_html(bool) const
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{
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StringBuilder builder;
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builder.append("<pre>");
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if (m_style.length() >= 2)
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builder.append("<strong>");
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else if (m_style.length() >= 2)
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builder.append("<em>");
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if (m_language.is_empty())
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builder.append("<code>");
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else
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builder.appendff("<code class=\"language-{}\">", escape_html_entities(m_language));
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if (m_language == "js")
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builder.append(JS::MarkupGenerator::html_from_source(m_code));
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else
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builder.append(escape_html_entities(m_code));
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builder.append("\n</code>");
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if (m_style.length() >= 2)
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builder.append("</strong>");
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else if (m_style.length() >= 2)
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builder.append("</em>");
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builder.append("</pre>\n");
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return builder.build();
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}
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String CodeBlock::render_for_terminal(size_t) const
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{
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StringBuilder builder;
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for (auto line : m_code.split('\n')) {
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builder.append(" ");
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builder.append(line);
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builder.append("\n");
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}
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return builder.build();
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}
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RecursionDecision CodeBlock::walk(Visitor& visitor) const
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{
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RecursionDecision rd = visitor.visit(*this);
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if (rd != RecursionDecision::Recurse)
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return rd;
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rd = visitor.visit(m_code);
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if (rd != RecursionDecision::Recurse)
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return rd;
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// Don't recurse on m_language and m_style.
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// Normalize return value.
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return RecursionDecision::Continue;
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}
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static Regex<ECMA262> style_spec_re("\\s*([\\*_]*)\\s*([^\\*_\\s]*).*");
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OwnPtr<CodeBlock> CodeBlock::parse(LineIterator& lines)
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{
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if (lines.is_end())
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return {};
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constexpr auto tick_tick_tick = "```";
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StringView line = *lines;
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if (!line.starts_with(tick_tick_tick))
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return {};
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// Our Markdown extension: we allow
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// specifying a style and a language
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// for a code block, like so:
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//
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// ```**sh**
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// $ echo hello friends!
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// ````
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//
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// The code block will be made bold,
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// and if possible syntax-highlighted
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// as appropriate for a shell script.
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StringView style_spec = line.substring_view(3, line.length() - 3);
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auto matches = style_spec_re.match(style_spec);
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auto style = matches.capture_group_matches[0][0].view.string_view();
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auto language = matches.capture_group_matches[0][1].view.string_view();
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++lines;
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bool first = true;
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StringBuilder builder;
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while (true) {
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if (lines.is_end())
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break;
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line = *lines;
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++lines;
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if (line == tick_tick_tick)
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break;
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if (!first)
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builder.append('\n');
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builder.append(line);
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first = false;
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}
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return make<CodeBlock>(language, style, builder.build());
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}
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}
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