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Fix UndoGroupOptimizer

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This commit is contained in:
Maxime Coste 2013-06-12 00:14:05 +02:00
parent 7306f6b33b
commit bd8daac3a1
1 changed files with 35 additions and 30 deletions
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41
src/buffer.cc
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@ -201,7 +201,7 @@ class UndoGroupOptimizer
++pos.column;
++count;
}
kak_assert(pos == endpos or pos == BufferCoord(endpos.line+1, 0));
kak_assert(pos == endpos);
return count;
}
@ -246,16 +246,22 @@ class UndoGroupOptimizer
coord.column += next_end.column - next_coord.column;
coord.line += next_end.line - next_coord.line;
}
else if (it->type == Insert)
{
if (next_end > coord)
else if (it->type == Insert and next_end > coord)
{
ByteCount start = count_byte_to(next_coord, coord, it_next->content);
ByteCount len = std::min(it->content.length(), it_next->content.length() - start);
kak_assert(it_next->content.substr(start, len) == it->content.substr(0, len));
it->coord = it_next->coord;
it->content = it->content.substr(len);
it_next->content = it_next->content.substr(0,start) + it_next->content.substr(start + len);
}
else if (it->type == Erase and next_end >= coord)
{
ByteCount start = count_byte_to(next_coord, coord, it_next->content);
it_next->content = it_next->content.substr(0, start) + it->content + it_next->content.substr(start);
it->coord = it_next->coord;
it->content.clear();
}
else
{
if (next_end.line == coord.line)
@ -266,18 +272,11 @@ class UndoGroupOptimizer
else
coord.line -= next_end.line - next_coord.line;
}
}
else if (it->type == Erase and next_end >= coord)
{
ByteCount start = count_byte_to(next_coord, coord, it_next->content);
it_next->content = it_next->content.substr(0, start) + it->content + it_next->content.substr(start);
it->coord = it_next->coord;
it->content.clear();
}
std::swap(*it, *it_next);
progress = true;
}
kak_assert(coord <= next_coord);
if (it->type == Erase and it_next->type == Erase and coord == next_coord)
{
it->content += it_next->content;
@ -294,18 +293,24 @@ class UndoGroupOptimizer
progress = true;
}
else if (it->type == Insert and it_next->type == Erase and
coord <= next_coord and next_coord < advance(coord, it->content))
next_coord < advance(coord, it->content))
{
ByteCount insert_len = it->content.length();
ByteCount erase_len = it_next->content.length();
ByteCount prefix_len = count_byte_to(coord, next_coord, it->content);
it->content = it->content.substr(0, prefix_len) +
((prefix_len + erase_len < insert_len) ?
it->content.substr(prefix_len + erase_len) : "");
it_next->content = (insert_len - prefix_len < erase_len) ?
it_next->content.substr(insert_len - prefix_len) : "";
ByteCount suffix_len = insert_len - prefix_len;
if (suffix_len >= erase_len)
{
it->content = it->content.substr(0, prefix_len) + it->content.substr(prefix_len + erase_len);
it_next = undo_group.erase(it_next);
}
else
{
it->content = it->content.substr(0, prefix_len);
it_next->content = it_next->content.substr(suffix_len);
++it, ++it_next;
}
progress = true;
}
else if (it->type == Erase and it_next->type == Insert and coord == next_coord and