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Refactor Buffer::do_insert

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This commit is contained in:
Maxime Coste 2016-03-15 23:28:10 +00:00
parent d2dfb9ecb1
commit 338462e94f
1 changed files with 28 additions and 43 deletions
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35
src/buffer.cc
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@ -345,32 +345,15 @@ ByteCoord Buffer::do_insert(ByteCoord pos, StringView content)
ByteCoord begin;
ByteCoord end;
const bool at_end = is_end(pos);
// if we inserted at the end of the buffer, we have created a new
// line without inserting a '\n'
if (at_end)
{
ByteCount start = 0;
for (ByteCount i = 0; i < content.length(); ++i)
{
if (content[i] == '\n')
{
m_lines.push_back(StringData::create(content.substr(start, i + 1 - start)));
start = i + 1;
}
}
if (start != content.length())
m_lines.push_back(StringData::create(content.substr(start)));
pos = line_count();
begin = pos.column == 0 ? pos : ByteCoord{ pos.line + 1, 0 };
end = ByteCoord{ line_count(), 0 };
}
else
{
StringView prefix = m_lines[pos.line].substr(0, pos.column);
StringView suffix = m_lines[pos.line].substr(pos.column);
const StringView prefix = at_end ?
StringView{} : m_lines[pos.line].substr(0, pos.column);
const StringView suffix = at_end ?
StringView{} : m_lines[pos.line].substr(pos.column);
LineList new_lines;
ByteCount start = 0;
for (ByteCount i = 0; i < content.length(); ++i)
{
@ -387,15 +370,17 @@ ByteCoord Buffer::do_insert(ByteCoord pos, StringView content)
new_lines.push_back(StringData::create(content.substr(start) + suffix));
auto line_it = m_lines.begin() + (int)pos.line;
*line_it = std::move(*new_lines.begin());
auto new_lines_it = new_lines.begin();
if (not at_end)
*line_it++ = std::move(*new_lines_it++);
m_lines.insert(line_it+1, std::make_move_iterator(new_lines.begin() + 1),
m_lines.insert(line_it,
std::make_move_iterator(new_lines_it),
std::make_move_iterator(new_lines.end()));
begin = pos;
const LineCount last_line = pos.line + new_lines.size() - 1;
end = ByteCoord{ last_line, m_lines[last_line].length() - suffix.length() };
}
m_changes.push_back({ Change::Insert, at_end, begin, end });
return begin;