public void RemoveTrailingLine(GeneratorDirection fillDirection)
{
if (fillDirection == GeneratorDirection.Forward)
{
var removed = _lines.RemoveFromFront();
//Move Start forward because we are removing a line from the start
Start += removed.Extent;
}
else
{
_lines.RemoveFromBack();
}
}
public void RemoveTrailingLine(FillDirection fillDirection)
{
if (fillDirection == FillDirection.Forward)
{
//Note: the Deque implementation used (https://github.com/StephenCleary/Deque/blob/master/src/Nito.Collections.Deque/Deque.cs)
//doesn't appear to actually release the reference to the item on calling the RemoveFrom_() methods.
//This isn't really a problem here, but precludes its use for storing, eg, views.
var removed = _lines.RemoveFromFront();
//Move Start forward because we are removing a line from the start
Start += removed.Extent;
}
else
{
_lines.RemoveFromBack();
}
}
/// <summary>
/// Remove all views not in the target range from the buffer.
/// </summary>
private void UnbufferViews(RecyclerView.Recycler recycler)
{
TrimEmpty();
UnbufferTrailing();
UnbufferLeading();
TrimEmpty(); //Empty items may have been exposed by unbuffering
CheckValidSteadyState();
void UnbufferTrailing()
{
if (TrailingBufferTargetSize == 0)
{
while (_trailingBuffer.Count > 0)
{
var record = _trailingBuffer.RemoveFromBack();
CheckValidState();
SendToIntermediateCache(recycler, record);
}
return;
}
while (TrailingBufferStart < TrailingBufferTargetStart)
{
if (_trailingBuffer.Count == 0)
{
return;
}
var record = _trailingBuffer.RemoveFromFront();
TrimEmpty();
CheckValidState();
SendToIntermediateCache(recycler, record);
}
while (TrailingBufferEnd > TrailingBufferTargetEnd)
{
if (_trailingBuffer.Count == 0)
{
return;
}
var record = _trailingBuffer.RemoveFromBack();
TrimEmpty();
CheckValidState();
SendToIntermediateCache(recycler, record);
}
}
void UnbufferLeading()
{
if (LeadingBufferTargetSize == 0)
{
while (_leadingBuffer.Count > 0)
{
var record = _leadingBuffer.RemoveFromBack();
CheckValidState();
SendToIntermediateCache(recycler, record);
}
return;
}
while (LeadingBufferStart < LeadingBufferTargetStart)
{
if (_leadingBuffer.Count == 0)
{
return;
}
var record = _leadingBuffer.RemoveFromFront();
TrimEmpty();
CheckValidState();
CheckValidSteadyState();
SendToIntermediateCache(recycler, record);
}
while (LeadingBufferEnd > LeadingBufferTargetEnd)
{
if (_leadingBuffer.Count == 0)
{
return;
}
var record = _leadingBuffer.RemoveFromBack();
TrimEmpty();
CheckValidState();
CheckValidSteadyState();
SendToIntermediateCache(recycler, record);
}
}
}
