/// <summary>
/// Manages the children of a React view.
/// </summary>
/// <param name="tag">The tag of the view to manager.</param>
/// <param name="indexesToRemove">Child indices to remove.</param>
/// <param name="viewsToAdd">Views to add.</param>
/// <param name="tagsToDelete">Tags to delete.</param>
public void ManageChildren(int tag, int[] indexesToRemove, ViewAtIndex[] viewsToAdd, int[] tagsToDelete)
{
var viewManager = default(IViewManager);
if (!_tagsToViewManagers.TryGetValue(tag, out viewManager))
{
throw new InvalidOperationException(
Invariant($"Trying to manage children with tag '{tag}' which doesn't exist."));
}
var ViewParentManager = (IViewParentManager)viewManager;
var viewToManage = _tagsToViews[tag];
var lastIndexToRemove = ViewParentManager.GetChildCount(viewToManage);
if (indexesToRemove != null)
{
for (var i = indexesToRemove.Length - 1; i >= 0; --i)
{
var indexToRemove = indexesToRemove[i];
if (indexToRemove < 0)
{
throw new InvalidOperationException(
Invariant($"Trying to remove a negative index '{indexToRemove}' on view tag '{tag}'."));
}
if (indexToRemove >= ViewParentManager.GetChildCount(viewToManage))
{
throw new InvalidOperationException(
Invariant($"Trying to remove a view index '{indexToRemove}' greater than the child could for view tag '{tag}'."));
}
if (indexToRemove >= lastIndexToRemove)
{
throw new InvalidOperationException(
Invariant($"Trying to remove an out of order index '{indexToRemove}' (last index was '{lastIndexToRemove}') for view tag '{tag}'."));
}
var viewToRemove = ViewParentManager.GetChildAt(viewToManage, indexToRemove) as Widget;
if (viewToRemove != null &&
_layoutAnimator.ShouldAnimateLayout(viewToRemove) && //TODO: LayoutAnimation will be merged later .. BOY.YANG
tagsToDelete != null && tagsToDelete.Contains(viewToRemove.GetTag()))
{
// The view will be removed and dropped by the 'delete'
// layout animation instead, so do nothing.
}
else
{
ViewParentManager.RemoveChildAt(viewToManage, indexToRemove);
}
lastIndexToRemove = indexToRemove;
}
}
if (viewsToAdd != null)
{
for (var i = 0; i < viewsToAdd.Length; ++i)
{
var viewAtIndex = viewsToAdd[i];
var viewToAdd = default(Widget);
if (!_tagsToViews.TryGetValue(viewAtIndex.Tag, out viewToAdd))
{
throw new InvalidOperationException(
Invariant($"Trying to add unknown view tag '{viewAtIndex.Tag}'."));
}
//Log.Info(ReactConstants.Tag, "## ManageChildren ## viewToManage:" + viewToManage + " viewToAdd:" + viewToAdd
// + " Index:"+ viewAtIndex.Index);
ViewParentManager.AddView(viewToManage, viewToAdd, viewAtIndex.Index);
}
}
if (tagsToDelete != null)
{
for (var i = 0; i < tagsToDelete.Length; ++i)
{
var tagToDelete = tagsToDelete[i];
var viewToDestroy = default(Widget);
if (!_tagsToViews.TryGetValue(tagToDelete, out viewToDestroy))
{
throw new InvalidOperationException(
Invariant($"Trying to destroy unknown view tag '{tagToDelete}'."));
}
var elementToDestroy = viewToDestroy as Widget;
if (elementToDestroy != null &&
_layoutAnimator.ShouldAnimateLayout(elementToDestroy)) //TODO: LayoutAnimation will be merged later .. BOY.YANG
{
_layoutAnimator.DeleteView(elementToDestroy, () =>
{
if (ViewParentManager.TryRemoveView(viewToManage, viewToDestroy))
{
DropView(viewToDestroy);
}
});
}
else
{
DropView(viewToDestroy);
}
}
}
}
/// <summary>
/// Manages the children of a React view.
/// </summary>
/// <param name="tag">The tag of the view to manager.</param>
/// <param name="indexesToRemove">Child indices to remove.</param>
/// <param name="viewsToAdd">Views to add.</param>
/// <param name="tagsToDelete">Tags to delete.</param>
public void ManageChildren(int tag, int[] indexesToRemove, ViewAtIndex[] viewsToAdd, int[] tagsToDelete)
{
var viewManager = default(IViewManager);
if (!_tagsToViewManagers.TryGetValue(tag, out viewManager))
{
throw new InvalidOperationException(
Invariant($"Trying to manage children with tag '{tag}' which doesn't exist."));
}
var viewParentManager = (IViewParentManager)viewManager;
var viewToManage = _tagsToViews[tag];
var lastIndexToRemove = viewParentManager.GetChildCount(viewToManage);
if (indexesToRemove != null)
{
for (var i = indexesToRemove.Length - 1; i >= 0; --i)
{
var indexToRemove = indexesToRemove[i];
if (indexToRemove < 0)
{
throw new InvalidOperationException(
Invariant($"Trying to remove a negative index '{indexToRemove}' on view tag '{tag}'."));
}
if (indexToRemove >= viewParentManager.GetChildCount(viewToManage))
{
throw new InvalidOperationException(
Invariant($"Trying to remove a view index '{indexToRemove}' greater than the child could for view tag '{tag}'."));
}
if (indexToRemove >= lastIndexToRemove)
{
throw new InvalidOperationException(
Invariant($"Trying to remove an out of order index '{indexToRemove}' (last index was '{lastIndexToRemove}') for view tag '{tag}'."));
}
var viewToRemove = viewParentManager.GetChildAt(viewToManage, indexToRemove) as FrameworkElement;
if (viewToRemove != null &&
_layoutAnimator.ShouldAnimateLayout(viewToRemove) &&
tagsToDelete.Contains(viewToRemove.GetTag()))
{
// The view will be removed and dropped by the 'delete'
// layout animation instead, so do nothing.
}
else
{
viewParentManager.RemoveChildAt(viewToManage, indexToRemove);
}
lastIndexToRemove = indexToRemove;
}
}
if (viewsToAdd != null)
{
for (var i = 0; i < viewsToAdd.Length; ++i)
{
var viewAtIndex = viewsToAdd[i];
var viewToAdd = default(DependencyObject);
if (!_tagsToViews.TryGetValue(viewAtIndex.Tag, out viewToAdd))
{
throw new InvalidOperationException(
Invariant($"Trying to add unknown view tag '{viewAtIndex.Tag}'."));
}
viewParentManager.AddView(viewToManage, viewToAdd, viewAtIndex.Index);
}
}
if (tagsToDelete != null)
{
for (var i = 0; i < tagsToDelete.Length; ++i)
{
var tagToDelete = tagsToDelete[i];
var viewToDestroy = default(DependencyObject);
if (!_tagsToViews.TryGetValue(tagToDelete, out viewToDestroy))
{
throw new InvalidOperationException(
Invariant($"Trying to destroy unknown view tag '{tagToDelete}'."));
}
var elementToDestroy = viewToDestroy as FrameworkElement;
if (elementToDestroy != null &&
_layoutAnimator.ShouldAnimateLayout(elementToDestroy))
{
var viewToDestroyManager = ResolveViewManager(tagToDelete);
_layoutAnimator.DeleteView(viewToDestroyManager, elementToDestroy, () =>
{
if (viewParentManager.TryRemoveView(viewToManage, viewToDestroy))
{
DropView(viewToDestroy);
}
});
}
else
{
DropView(viewToDestroy);
}
}
}
_deletedTagsBatchReporter.Send();
}