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20faa93cb0
Previously, all Markdown blocks had a virtual parse method which has been swapped out for a static parse method returning an OwnPtr of that block's type. The Text class also now has a static parse method that will return an Optional<Text>.
157 lines
4.2 KiB
C++
157 lines
4.2 KiB
C++
/*
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* Copyright (c) 2019-2020, Sergey Bugaev <bugaevc@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/StringBuilder.h>
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#include <LibMarkdown/CodeBlock.h>
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namespace Markdown {
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Text::Style CodeBlock::style() const
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{
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if (m_style_spec.spans().is_empty())
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return {};
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return m_style_spec.spans()[0].style;
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}
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String CodeBlock::style_language() const
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{
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if (m_style_spec.spans().is_empty())
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return {};
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return m_style_spec.spans()[0].text;
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}
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String CodeBlock::render_to_html() const
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{
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StringBuilder builder;
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String style_language = this->style_language();
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Text::Style style = this->style();
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if (style.strong)
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builder.append("<b>");
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if (style.emph)
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builder.append("<i>");
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if (style_language.is_null())
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builder.append("<code style=\"white-space: pre;\">");
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else
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builder.appendf("<code style=\"white-space: pre;\" class=\"%s\">", style_language.characters());
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builder.append(escape_html_entities(m_code));
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builder.append("</code>");
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if (style.emph)
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builder.append("</i>");
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if (style.strong)
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builder.append("</b>");
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builder.append('\n');
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return builder.build();
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}
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String CodeBlock::render_for_terminal() const
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{
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StringBuilder builder;
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Text::Style style = this->style();
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bool needs_styling = style.strong || style.emph;
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if (needs_styling) {
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builder.append("\033[");
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bool first = true;
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if (style.strong) {
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builder.append('1');
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first = false;
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}
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if (style.emph) {
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if (!first)
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builder.append(';');
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builder.append('4');
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}
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builder.append('m');
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}
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builder.append(m_code);
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if (needs_styling)
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builder.append("\033[0m");
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builder.append("\n\n");
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return builder.build();
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}
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OwnPtr<CodeBlock> CodeBlock::parse(Vector<StringView>::ConstIterator& lines)
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{
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if (lines.is_end())
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return nullptr;
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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 nullptr;
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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 spec = Text::parse(style_spec);
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if (!spec.has_value())
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return nullptr;
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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>(move(spec.value()), builder.build());
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}
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}
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