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Fix shifting contiguous selections downward

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Reverse iterators behave differently from regular iterators when
swapping (regular iterators continue to point at the same elements,
while reverse iterators do not), so instead use regular iterators with a
negative step for shifting down.
This commit is contained in:
Thomas Goyne 2013-09-30 17:01:15 -07:00
parent 921d5ed01a
commit bbd4cbef78
1 changed files with 14 additions and 13 deletions
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27
aegisub/src/command/grid.cpp
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@ -350,18 +350,19 @@ struct grid_tags_simplify : public Command {
};
template<class T, class U>
static bool move_one(T begin, T end, U const& value) {
static bool move_one(T begin, T end, U const& to_move, int step) {
size_t move_count = 0;
T prev = end;
for (; begin != end; ++begin) {
typename U::key_type cur = dynamic_cast<typename U::key_type>(&*begin);
bool in_set = !!value.count(cur);
if (!in_set && cur)
prev = begin;
else if (in_set && prev != end) {
begin->swap_nodes(*prev);
prev = begin;
if (++move_count == value.size())
auto prev = end;
for (auto it = begin; it != end; std::advance(it, step)) {
auto cur = dynamic_cast<typename U::key_type>(&*it);
if (!cur) continue;
if (!to_move.count(cur))
prev = it;
else if (prev != end) {
it->swap_nodes(*prev);
prev = it;
if (++move_count == to_move.size())
break;
}
}
@ -382,7 +383,7 @@ struct grid_move_up : public Command {
}
void operator()(agi::Context *c) {
if (move_one(c->ass->Line.begin(), c->ass->Line.end(), c->selectionController->GetSelectedSet()))
if (move_one(c->ass->Line.begin(), c->ass->Line.end(), c->selectionController->GetSelectedSet(), 1))
c->ass->Commit(_("move lines"), AssFile::COMMIT_ORDER);
}
};
@ -400,7 +401,7 @@ struct grid_move_down : public Command {
}
void operator()(agi::Context *c) {
if (move_one(c->ass->Line.rbegin(), c->ass->Line.rend(), c->selectionController->GetSelectedSet()))
if (move_one(--c->ass->Line.end(), c->ass->Line.begin(), c->selectionController->GetSelectedSet(), -1))
c->ass->Commit(_("move lines"), AssFile::COMMIT_ORDER);
}
};