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/*
* Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/StringBuilder.h>
#include <LibJS/MarkupGenerator.h>
#include <LibMarkdown/CodeBlock.h>
namespace Markdown {
Text::Style CodeBlock::style() const
{
if (m_style_spec.spans().is_empty())
return {};
return m_style_spec.spans()[0].style;
}
String CodeBlock::style_language() const
{
if (m_style_spec.spans().is_empty())
return {};
return m_style_spec.spans()[0].text;
}
String CodeBlock::render_to_html() const
{
StringBuilder builder;
String style_language = this->style_language();
Text::Style style = this->style();
if (style.strong)
builder.append("<b>");
if (style.emph)
builder.append("<i>");
if (style_language.is_empty())
builder.append("<code>");
else
builder.appendff("<code class=\"{}\">", style_language);
if (style_language == "js")
builder.append(JS::MarkupGenerator::html_from_source(m_code));
else
builder.append(escape_html_entities(m_code));
builder.append("</code>");
if (style.emph)
builder.append("</i>");
if (style.strong)
builder.append("</b>");
builder.append('\n');
return builder.build();
}
String CodeBlock::render_for_terminal(size_t) const
{
StringBuilder builder;
Text::Style style = this->style();
bool needs_styling = style.strong || style.emph;
if (needs_styling) {
builder.append("\033[");
bool first = true;
if (style.strong) {
builder.append('1');
first = false;
}
if (style.emph) {
if (!first)
builder.append(';');
builder.append('4');
}
builder.append('m');
}
builder.append(m_code);
if (needs_styling)
builder.append("\033[0m");
builder.append("\n\n");
return builder.build();
}
OwnPtr<CodeBlock> CodeBlock::parse(Vector<StringView>::ConstIterator& lines)
{
if (lines.is_end())
return {};
constexpr auto tick_tick_tick = "```";
StringView line = *lines;
if (!line.starts_with(tick_tick_tick))
return {};
// Our Markdown extension: we allow
// specifying a style and a language
// for a code block, like so:
//
// ```**sh**
// $ echo hello friends!
// ````
//
// The code block will be made bold,
// and if possible syntax-highlighted
// as appropriate for a shell script.
StringView style_spec = line.substring_view(3, line.length() - 3);
auto spec = Text::parse(style_spec);
if (!spec.has_value())
return {};
++lines;
bool first = true;
StringBuilder builder;
while (true) {
if (lines.is_end())
break;
line = *lines;
++lines;
if (line == tick_tick_tick)
break;
if (!first)
builder.append('\n');
builder.append(line);
first = false;
}
return make<CodeBlock>(move(spec.value()), builder.build());
}
}
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