private void FillContainer(VirtualList.ItemContainer container, int itemID)
{
RectTransform rectTransform = (RectTransform)null;
if (this.OnGetItemObject != null)
{
rectTransform = this.OnGetItemObject(itemID, !Object.op_Inequality((Object)container.Body, (Object)null) ? -1 : container.ItemID, container.Body);
}
if (Object.op_Equality((Object)rectTransform, (Object)null))
{
return;
}
if (Object.op_Inequality((Object)container.Body, (Object)null) && Object.op_Inequality((Object)container.Body, (Object)rectTransform) && Object.op_Equality((Object)((Transform)container.Body).get_parent(), (Object)container.RectTr))
{
((Transform)container.Body).SetParent((Transform)null, false);
}
container.Body = rectTransform;
container.ItemID = itemID;
((Transform)rectTransform).SetParent((Transform)container.RectTr, false);
Vector2 anchoredPosition = rectTransform.get_anchoredPosition();
// ISSUE: explicit reference operation
if ((double)((Vector2)@anchoredPosition).get_sqrMagnitude() <= 0.0)
{
return;
}
rectTransform.set_anchoredPosition(Vector2.get_zero());
}
public RectTransform FindItem(int itemID)
{
VirtualList.ItemContainer itemContainer = this.FindItemContainer(itemID);
if (Object.op_Inequality((Object)itemContainer, (Object)null))
{
return(itemContainer.Body);
}
return((RectTransform)null);
}
private void SwapFast(VirtualList.ItemContainer a, VirtualList.ItemContainer b)
{
int itemId = a.ItemID;
a.ItemID = b.ItemID;
b.ItemID = itemId;
RectTransform body = a.Body;
a.Body = b.Body;
b.Body = body;
}
private void ReserveItems(int maxItems)
{
Transform transform = ((Component)this).get_transform();
this.mNumVisibleItems = maxItems;
for (int count = this.mItemObjects.Count; count < maxItems; ++count)
{
VirtualList.ItemContainer component = (VirtualList.ItemContainer) new GameObject(count.ToString(), new System.Type[2]
{
typeof(RectTransform),
typeof(VirtualList.ItemContainer)
}).GetComponent <VirtualList.ItemContainer>();
RectTransform rectTr = component.RectTr;
Vector2 vector2_1 = new Vector2(0.0f, 1f);
component.RectTr.set_anchorMax(vector2_1);
Vector2 vector2_2 = vector2_1;
rectTr.set_anchorMin(vector2_2);
component.RectTr.set_sizeDelta(this.ItemSize);
((Transform)component.RectTr).SetParent(transform, false);
this.mItemObjects.Add(component);
}
}
private void Rebuild()
{
if (this.IsDiscarding())
{
return;
}
Rect rect1 = (((Component)this).get_transform() as RectTransform).get_rect();
int num1 = this.CalcPitch();
if (num1 <= 0)
{
return;
}
Rect rect2 = (((Component)this.ScrollRect).get_transform() as RectTransform).get_rect();
bool isHorizontal = this.IsHorizontal;
int num2;
int num3;
int num4;
int num5;
if (isHorizontal)
{
// ISSUE: explicit reference operation
this.ReserveItems(Mathf.Max(Mathf.CeilToInt(((Rect)@rect2).get_width() / (float)this.ItemSize.x) + 1, 1) * num1);
// ISSUE: explicit reference operation
if ((double)((Rect)@rect1).get_width() <= 0.0)
{
this.DisableAllItems();
return;
}
// ISSUE: explicit reference operation
// ISSUE: explicit reference operation
num2 = Mathf.FloorToInt(-this.HorizontalNormalizedPosition * (((Rect)@rect2).get_width() - ((Rect)@rect1).get_width()) / (float)this.ItemSize.x);
if ((double)this.mLastScrollPosition <= (double)this.HorizontalNormalizedPosition)
{
num3 = 0;
num4 = this.mItemObjects.Count;
num5 = 1;
}
else
{
num3 = this.mItemObjects.Count - 1;
num4 = -1;
num5 = -1;
}
this.mLastScrollPosition = this.HorizontalNormalizedPosition;
}
else
{
// ISSUE: explicit reference operation
this.ReserveItems(num1 * Mathf.Max(Mathf.CeilToInt(((Rect)@rect2).get_width() / (float)this.ItemSize.x), 1));
// ISSUE: explicit reference operation
if ((double)((Rect)@rect1).get_height() <= 0.0)
{
this.DisableAllItems();
return;
}
// ISSUE: explicit reference operation
// ISSUE: explicit reference operation
num2 = Mathf.FloorToInt((float)-(1.0 - (double)this.ScrollRect.get_verticalNormalizedPosition()) * (((Rect)@rect2).get_height() - ((Rect)@rect1).get_height()) / (float)this.ItemSize.y);
if ((double)this.mLastScrollPosition >= (double)this.ScrollRect.get_verticalNormalizedPosition())
{
num3 = 0;
num4 = this.mItemObjects.Count;
num5 = 1;
}
else
{
num3 = this.mItemObjects.Count - 1;
num4 = -1;
num5 = -1;
}
this.mLastScrollPosition = this.ScrollRect.get_verticalNormalizedPosition();
}
bool flag = false;
int index1 = num3;
while (index1 != num4)
{
RectTransform rectTr = this.mItemObjects[index1].RectTr;
int num6;
int num7;
int index2;
if (isHorizontal)
{
num6 = index1 / num1 + num2;
num7 = index1 % num1;
index2 = num6 * num1 + num7;
}
else
{
num6 = index1 % num1;
num7 = index1 / num1 + num2;
index2 = num6 + num7 * num1;
}
Vector2 sizeDelta = rectTr.get_sizeDelta();
Vector2 pivot = rectTr.get_pivot();
float x = (float)((double)num6 * this.ItemSize.x + sizeDelta.x * pivot.x);
float y = (float)((double)-num7 * this.ItemSize.y - sizeDelta.y * pivot.y);
if (0 <= index2 && index2 < this.mItems.Count)
{
if (!this.mForceRebuild)
{
int itemAtPosition = this.FindItemAtPosition(this.mItems[index2], x, y);
if (itemAtPosition >= 0 && itemAtPosition != index1)
{
VirtualList.ItemContainer mItemObject = this.mItemObjects[index1];
this.mItemObjects[index1] = this.mItemObjects[itemAtPosition];
this.mItemObjects[itemAtPosition] = mItemObject;
goto label_31;
}
}
VirtualList.ItemContainer itemContainer = this.FindItemContainer(this.mItems[index2]);
if (Object.op_Inequality((Object)itemContainer, (Object)null))
{
itemContainer.SetBodyActive(true);
this.SwapFast(itemContainer, this.mItemObjects[index1]);
flag = true;
}
else
{
VirtualList.ItemContainer mItemObject = this.mItemObjects[index1];
mItemObject.SetBodyActive(true);
this.FillContainer(mItemObject, this.mItems[index2]);
}
}
else
{
this.mItemObjects[index1].SetBodyActive(false);
}
rectTr.set_anchoredPosition(new Vector2(x, y));
label_31:
index1 += num5;
}
if (flag)
{
this.ReparentItems();
}
this.mForceRebuild = false;
if (this.OnPostListUpdate == null)
{
return;
}
this.OnPostListUpdate();
}