/** Move attached rows to somewhere else in same storage
*
* There is a lot of trickery going on here. The whole point of this
* code is that moving rows between (compatible!) subviews should not
* use copying when potentially large memo's and subviews are involved.
* In that case, the best solution is really to move pointers, not data.
*/
void c4_View::RelocateRows(int from_, int count_, c4_View& dest_, int pos_)
{
if (count_ < 0)
count_ = GetSize() - from_;
if (pos_ < 0)
pos_ = dest_.GetSize();
d4_assert(0 <= from_ && from_ <= GetSize());
d4_assert(0 <= count_ && from_ + count_ <= GetSize());
d4_assert(0 <= pos_ && pos_ <= dest_.GetSize());
if (count_ > 0) {
// the destination must not be inside the source rows
d4_assert(&dest_ != this || from_ > pos_ || pos_ >= from_ + count_);
// this test is slow, so do it only as a debug check
d4_assert(IsCompatibleWith(dest_));
// make space, swap rows, drop originals
c4_Row empty;
dest_.InsertAt(pos_, empty, count_);
// careful if insert moves origin
if (&dest_ == this && pos_ <= from_)
from_ += count_;
for (int i = 0; i < count_; ++i)
((c4_HandlerSeq*) _seq)->ExchangeEntries(from_ + i,
*(c4_HandlerSeq*) dest_._seq, pos_ + i);
RemoveAt(from_, count_);
}
}
bool c4_SliceViewer::InsertRows(int pos_, c4_Cursor value_, int count_) {
if (_step != 1)
return false;
pos_ = _first + _step *(_step > 0 ? pos_ : pos_ - GetSize() + 1);
if (_limit >= 0)
_limit += count_;
_parent.InsertAt(pos_, *value_, count_);
return true;
}
int CResizer::Ins(int pos_, int cnt_) {
A(pos_ <= _refSize);
A(_refSize + cnt_ < kMaxData);
memmove(_refData + pos_ + cnt_, _refData + pos_, _refSize - pos_);
_refSize += cnt_;
c4_Row row;
_unattached.InsertAt(pos_, row, cnt_);
_attached.InsertAt(pos_, row, cnt_);
for (int i = pos_; i < pos_ + cnt_; ++i) {
_refData[i] = ++_seed;
_prop(_unattached[i]) = _seed;
_prop(_attached[i]) = _seed;
if (_seed >= 123)
_seed = 0;
}
Verify();
return _refSize;
}
bool c4_PairViewer::InsertRows(int pos_, c4_Cursor value_, int count_)
{
_parent.InsertAt(pos_, *value_, count_);
_argView.InsertAt(pos_, *value_, count_);
return true;
}
