Method FindHyperlinksInMarkdown

src/textfile_gui.cpp:225–277

* Find any hyperlinks in a given line. * * @param line The line to search for hyperlinks. * @param line_index The index of the line. */

 * @param line_index The index of the line.
 */
void TextfileWindow::FindHyperlinksInMarkdown(Line &line, size_t line_index)
{
	std::string::const_iterator last_match_end = line.text.cbegin();
	std::string fixed_line;
	StringBuilder builder(fixed_line);

	std::sregex_iterator matcher{ line.text.cbegin(), line.text.cend(), _markdown_link_regex};
	while (matcher != std::sregex_iterator()) {
		std::smatch match = *matcher;

		Hyperlink &link = this->links.emplace_back(line_index, 0, 0, match[2].str());

		HyperlinkType link_type = ClassifyHyperlink(link.destination, this->trusted);
		StringControlCode link_colour;
		switch (link_type) {
			case HyperlinkType::Internal:
				link_colour = SCC_GREEN;
				break;
			case HyperlinkType::Web:
				link_colour = SCC_LTBLUE;
				break;
			case HyperlinkType::File:
				link_colour = SCC_LTBROWN;
				break;
			default:
				/* Don't make other link types fancy as they aren't handled (yet). */
				link_colour = SCC_CONTROL_END;
				break;
		}

		if (link_colour != SCC_CONTROL_END) {
			/* Format the link to look like a link. */
			builder += std::string_view(last_match_end, match[0].first);
			link.begin = fixed_line.length();
			builder.PutUtf8(SCC_PUSH_COLOUR);
			builder.PutUtf8(link_colour);
			builder += match[1].str();
			link.end = fixed_line.length();
			builder.PutUtf8(SCC_POP_COLOUR);
			last_match_end = match[0].second;
		}

		/* Find next link. */
		++matcher;
	}
	if (last_match_end == line.text.cbegin()) return; // nothing found

	/* Add remaining text on line. */
	fixed_line += std::string(last_match_end, line.text.cend());

	/* Overwrite original line text with "fixed" line text. */
	line.text = std::move(fixed_line);
}

/**
 * Get the hyperlink at the given position.