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<space>, <a-space>: throw on invalid preconditions

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This commit is contained in:
Olivier Perret 2017-03-03 13:44:09 +01:00
parent eace7e0424
commit 033b259e5b
1 changed files with 11 additions and 9 deletions
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10
src/normal.cc
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@ -1654,7 +1654,8 @@ void keep_selection(Context& context, NormalParams p)
{
auto& selections = context.selections();
const int index = p.count ? p.count-1 : selections.main_index();
if (index < selections.size())
if (index >= selections.size())
throw runtime_error("invalid selection index");
selections = SelectionList{ selections.buffer(), std::move(selections[index]) };
selections.check_invariant();
}
@ -1663,13 +1664,14 @@ void remove_selection(Context& context, NormalParams p)
{
auto& selections = context.selections();
const int index = p.count ? p.count-1 : selections.main_index();
if (selections.size() > 1 and index < selections.size())
{
if (index >= selections.size())
throw runtime_error("invalid selection index");
if (selections.size() == 1)
throw runtime_error("no selections remaining");
selections.remove(index);
size_t main_index = selections.main_index();
if (index < main_index or main_index == selections.size())
selections.set_main_index(main_index - 1);
}
selections.check_invariant();
}