internal void Flush()
{
var patch = Diff();
if (patch == null)
{
return;
}
if (patch is NActionPatch) // Assign New UI
{
#if DEBUG
Debug.WriteLine("New UI for : " + this);
Debug.WriteLine(_ui);
}
else
{
Debug.WriteLine("New UI Patch for : " + this);
Debug.WriteLine(patch);
#endif
}
NPatch.OnUIThread(patch, i =>
{
BeginPatching();
try
{
Xaml = i.Apply(Xaml);
}
finally
{
EndPatching();
}
});
}
internal virtual void Free()
{
for (var i = _props.Head; i != null; i = i.Next)
{
NPatch.Finalize(i._value);
}
}
public static NPatch Diff(NElement oldE, ref NElement newE)
{
var oldSet = oldE != null;
var newSet = newE != null;
if (oldSet == newSet)
{
if (!oldSet)
{
return(null);
}
if (NPatch.ElementEquals(oldE, newE))
{
var oldC = oldE as NClass;
if (oldC != null)
{
var newC = (NClass)newE;
newE = oldE;
return(oldC.Upgrade(newC));
}
return(new NPropDiffer(oldE, newE).Diff());
}
}
return(NPatch.AssignNewValue);
}
NPatch Diff()
{
var cOld = _source.Length;
var cNew = _target.Length;
if (cOld == 0 || cNew == 0)
{
return(NPatch.AssignNewValue);
}
var iOld = 0;
var iNew = 0;
var iFix = 0;
for (;;)
{
var oldH = iOld < cOld;
var oldE = oldH ? _source[iOld] : null;
var newH = iNew < cNew;
var newE = newH ? _target[iNew] : null;
if (oldH)
{
if (newH && NPatch.ElementEquals(oldE, newE))
{
Update(iOld + iFix, newE, oldE);
iNew++;
}
else
{
Remove(iOld + iFix, oldE);
iFix--;
}
iOld++;
}
else
{
if (newH)
{
Insert(iOld + iFix, newE);
iOld++;
iNew++;
}
else
{
break;
}
}
}
Optimize();
TransferClasses();
return(_head != null ? new NListPatch(_head) : null);
}
internal override void Free()
{
Xaml = null;
for (var i = _propsCommitted.Head; i != null; i = i.Next)
{
NPatch.Finalize(i._value);
}
for (var i = _stateCommitted.Head; i != null; i = i.Next)
{
NPatch.Finalize(i._value);
}
_ui?.Free();
}
public void Run(NListPatchEntry head)
{
for (var i = head; i != null; i = i.Next)
{
switch (i.Op)
{
case NListPatchOp.Insert: DoInsert(i); break;
case NListPatchOp.Remove: DoRemove(i); break;
case NListPatchOp.Patch: DoPatch(i); break;
case NListPatchOp.Move: DoMove(i); break;
}
NPatch.Finalize(i.Finalizer);
}
}
static void SetRenderElement(DependencyObject d, DependencyPropertyChangedEventArgs args)
{
NPatch.Finalize(args.OldValue);
var e = (NElement)args.NewValue;
if (e == null)
{
return;
}
var cc = d as ContentControl;
if (cc != null)
{
cc.Render(e); return;
}
var uc = d as UserControl;
if (uc != null)
{
uc.Render(e); return;
}
#if !NETFX_CORE
var w = d as Window;
if (w != null)
{
w.Render(e); return;
}
#endif
var b = d as Border;
if (b != null)
{
b.Render(e); return;
}
throw new NotSupportedException();
}
void OptimizeRemove(NListPatchEntry e)
{
var delta = 0;
var oldE = e.Finalizer;
var last = e;
for (var i = e.Next; i != null; i = i.Next)
{
switch (i.Op)
{
case NListPatchOp.Insert:
{
var newE = i.Value;
if (NPatch.ElementEquals(newE, oldE))
{
e.Op = NListPatchOp.Move; // transform to move
e.Finalizer = null; // remove finalizer
e.iInsert = i.iInsert + delta; // correct insert index at the time of move
e.iFinal = i.iFinal; // preserve final index
e.Patch = NPropDiffer.Diff(oldE, ref newE); // make patch
e.Value = oldE; // preserve moved value
last.Next = i.Next; // delete insertion
return;
}
delta--;
}
break;
case NListPatchOp.Remove:
delta++;
break;
}
last = i;
}
}
public NProperty Property <T>(BindableProperty property, Func <object, object> converter = null) where T : BindableObject
{
return(Support(typeof(T), (t, v) => NPatch.AssignSingle((BindableObject)t, v, property, converter)));
}
public NProperty List <T>(Func <T, IList> getter /*, Action<T, IList> setter = null*/)
{
return(Support(typeof(T), (t, v) => NPatch.AssignList(getter((T)t), v)));
}
public static NProperty CreateRoot() => new NProperty(nameof(NProperties.Root)). Property <TableView>((t, v) => NPatch.AssignListT(t.Root, v));
