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LibMarkdown: Rewrite Inline text parser to be more forgiving

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The previous Text::parse was not able to give up on parsing a textual
element, and just leave it as plain text. Because this is a very
important part of markdown, I fully rewrote the parser to support this
without having to backtrack. Also the parser now some other little
features, such ast delimiter runs and flanking.
This commit is contained in:
Peter Elliott 2021-09-06 19:11:46 -06:00 • committed by Andreas Kling
parent 80e58dab9a
commit ec9f892899
10 changed files with 462 additions and 397 deletions
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21
Userland/Libraries/LibMarkdown/Table.cpp
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@ -16,9 +16,7 @@ String Table::render_for_terminal(size_t view_width) const
StringBuilder builder;
auto write_aligned = [&](const auto& text, auto width, auto alignment) {
size_t original_length = 0;
for (auto& span : text.spans())
original_length += span.text.length();
size_t original_length = text.terminal_length();
auto string = text.render_for_terminal();
if (alignment == Alignment::Center) {
auto padding_length = (width - original_length) / 2;
@ -137,11 +135,8 @@ OwnPtr<Table> Table::parse(Vector<StringView>::ConstIterator& lines)
table->m_columns.resize(header_delimiters.size());
for (size_t i = 0; i < header_segments.size(); ++i) {
auto text_option = Text::parse(header_segments[i]);
if (!text_option.has_value())
return {}; // An invalid 'text' in the header should just fail the table parse.
auto text = Text::parse(header_segments[i]);
auto text = text_option.release_value();
auto& column = table->m_columns[i];
column.header = move(text);
@ -199,16 +194,10 @@ OwnPtr<Table> Table::parse(Vector<StringView>::ConstIterator& lines)
if (i >= segments.size()) {
// Ran out of segments, but still have headers.
// Just make an empty cell.
table->m_columns[i].rows.append(Text { "" });
table->m_columns[i].rows.append(Text::parse(""));
} else {
auto text_option = Text::parse(segments[i]);
// We treat an invalid 'text' as a literal.
if (text_option.has_value()) {
auto text = text_option.release_value();
table->m_columns[i].rows.append(move(text));
} else {
table->m_columns[i].rows.append(Text { segments[i] });
}
auto text = Text::parse(segments[i]);
table->m_columns[i].rows.append(move(text));
}
}
}