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d2f9fee4ab
This also improves Commonmark coverage, e.g. it fixes tests HTML_blocks_ex179_2894..2906 and Lists_ex308_5439..5457. In other words, we go from 271 out of 652 to 273 out of 652.
137 lines
3.6 KiB
C++
137 lines
3.6 KiB
C++
/*
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* Copyright (c) 2021, Peter Elliott <pelliott@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 <LibMarkdown/BlockQuote.h>
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#include <LibMarkdown/CodeBlock.h>
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#include <LibMarkdown/ContainerBlock.h>
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#include <LibMarkdown/Heading.h>
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#include <LibMarkdown/HorizontalRule.h>
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#include <LibMarkdown/List.h>
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#include <LibMarkdown/Paragraph.h>
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#include <LibMarkdown/Table.h>
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#include <LibMarkdown/Visitor.h>
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namespace Markdown {
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String ContainerBlock::render_to_html(bool tight) const
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{
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StringBuilder builder;
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for (size_t i = 0; i + 1 < m_blocks.size(); ++i) {
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auto s = m_blocks[i].render_to_html(tight);
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builder.append(s);
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}
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// I don't like this edge case.
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if (m_blocks.size() != 0) {
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auto& block = m_blocks[m_blocks.size() - 1];
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auto s = block.render_to_html(tight);
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if (tight && dynamic_cast<Paragraph const*>(&block)) {
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builder.append(s.substring_view(0, s.length() - 1));
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} else {
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builder.append(s);
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}
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}
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return builder.build();
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}
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String ContainerBlock::render_for_terminal(size_t view_width) const
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{
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StringBuilder builder;
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for (auto& block : m_blocks) {
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auto s = block.render_for_terminal(view_width);
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builder.append(s);
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}
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return builder.build();
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}
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RecursionDecision ContainerBlock::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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for (auto const& block : m_blocks) {
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rd = block.walk(visitor);
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if (rd == RecursionDecision::Break)
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return rd;
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}
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return RecursionDecision::Continue;
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}
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template<typename BlockType>
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static bool try_parse_block(LineIterator& lines, NonnullOwnPtrVector<Block>& blocks)
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{
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OwnPtr<BlockType> block = BlockType::parse(lines);
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if (!block)
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return false;
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blocks.append(block.release_nonnull());
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return true;
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}
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OwnPtr<ContainerBlock> ContainerBlock::parse(LineIterator& lines)
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{
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NonnullOwnPtrVector<Block> blocks;
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StringBuilder paragraph_text;
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auto flush_paragraph = [&] {
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if (paragraph_text.is_empty())
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return;
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auto paragraph = make<Paragraph>(Text::parse(paragraph_text.build()));
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blocks.append(move(paragraph));
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paragraph_text.clear();
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};
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bool has_blank_lines = false;
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bool has_trailing_blank_lines = false;
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while (true) {
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if (lines.is_end())
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break;
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if ((*lines).is_empty()) {
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has_trailing_blank_lines = true;
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++lines;
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flush_paragraph();
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continue;
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} else {
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has_blank_lines = has_blank_lines || has_trailing_blank_lines;
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}
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bool any = try_parse_block<Table>(lines, blocks)
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|| try_parse_block<List>(lines, blocks)
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|| try_parse_block<CodeBlock>(lines, blocks)
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|| try_parse_block<CommentBlock>(lines, blocks)
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|| try_parse_block<Heading>(lines, blocks)
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|| try_parse_block<HorizontalRule>(lines, blocks)
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|| try_parse_block<BlockQuote>(lines, blocks);
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if (any) {
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if (!paragraph_text.is_empty()) {
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auto last_block = blocks.take_last();
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flush_paragraph();
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blocks.append(move(last_block));
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}
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continue;
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}
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if (!paragraph_text.is_empty())
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paragraph_text.append("\n");
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paragraph_text.append(*lines++);
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}
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flush_paragraph();
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return make<ContainerBlock>(move(blocks), has_blank_lines, has_trailing_blank_lines);
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}
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}
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