OXYGENHUB
◆ main openmsx / src / console / ConsoleLine.cc
2.1 KiB · C++ · last changed chore(): initial commit 1 month ago source blame history raw
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#include "ConsoleLine.hh"
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#include "narrow.hh"
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#include "stl.hh"
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#include "strCat.hh"
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#include "utf8_unchecked.hh"
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#include <algorithm>
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#include <ranges>
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namespace openmsx {
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ConsoleLine::ConsoleLine(std::string line_, imColor color)
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	: line(std::move(line_))
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	, chunks(1, {color, 0})
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{
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}
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void ConsoleLine::addChunk(std::string_view text, imColor color)
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{
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	chunks.push_back({.color = color, .pos = line.size()});
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	line.append(text.data(), text.size());
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}
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void ConsoleLine::addLine(const ConsoleLine& ln)
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{
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	auto oldN = chunks.size();
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	auto oldPos = line.size();
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	strAppend(line, ln.line);
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	append(chunks, ln.chunks);
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	for (auto it = chunks.begin() + oldN, et = chunks.end(); it != et; ++it) {
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		it->pos += oldPos;
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	}
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}
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/** Split this line at a given column number.
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	* This line will contain (up to) 'column' number of characters.
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	* The remainder of the line is returned, this could be an empty line. */
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ConsoleLine ConsoleLine::splitAtColumn(unsigned column)
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{
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	ConsoleLine result;
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	if (line.empty()) return result;
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	assert(!chunks.empty());
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	auto it = line.begin(), et = line.end();
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	while ((it != et) && column--) {
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		utf8::unchecked::next(it);
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	}
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	auto pos = narrow<unsigned>(std::distance(line.begin(), it));
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	auto it2 = std::ranges::upper_bound(chunks, pos, {}, &Chunk::pos);
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	assert(it2 != chunks.begin());
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	auto splitColor = it2[-1].color;
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	if (it != et) {
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		result.addChunk(std::string_view{it, et}, splitColor);
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		result.chunks.insert(result.chunks.end(), it2, chunks.end());
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		for (auto& c : std::views::drop(result.chunks, 1)) {
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			c.pos -= pos;
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		}
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	}
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	line.erase(it, et);
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	if (it2[-1].pos == pos) --it2;
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	chunks.erase(it2, chunks.end());
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	return result;
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}
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size_t ConsoleLine::numChars() const
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{
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	return utf8::unchecked::size(line);
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}
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imColor ConsoleLine::chunkColor(size_t i) const
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{
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	assert(i < chunks.size());
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	return chunks[i].color;
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}
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std::string_view ConsoleLine::chunkText(size_t i) const
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{
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	assert(i < chunks.size());
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	auto pos = chunks[i].pos;
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	auto len = ((i + 1) == chunks.size())
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	         ? std::string_view::npos
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	         : chunks[i + 1].pos - pos;
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	return std::string_view(line).substr(pos, len);
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}
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} // namespace openmsx