/// <summary>
/// Dispatches a batch of updates.
/// </summary>
/// <param name="absoluteX">
/// The absolute X-position of the node.
/// </param>
/// <param name="absoluteY">
/// The
/// </param>
/// <param name="uiViewOperationQueue">
/// Interface for enqueueing UI operations.
/// </param>
/// <param name="nativeViewHierarchyOptimizer">
/// Interface for optimizing native hierarchy calls.
/// </param>
/// <returns>
/// <code>true</code> if updates were dispatched, otherwise <code>false</code>.
/// </returns>
internal bool DispatchUpdates(
float absoluteX,
float absoluteY,
UIViewOperationQueue uiViewOperationQueue,
NativeViewHierarchyOptimizer nativeViewHierarchyOptimizer)
{
if (_nodeUpdated)
{
OnCollectExtraUpdates(uiViewOperationQueue);
}
if (HasNewLayout)
{
_absoluteLeft = absoluteX + LayoutX;
_absoluteTop = absoluteY + LayoutY;
_absoluteRight = absoluteX + LayoutX + LayoutWidth;
_absoluteBottom = absoluteY + LayoutY + LayoutHeight;
nativeViewHierarchyOptimizer.HandleUpdateLayout(this);
return(true);
}
else
{
return(false);
}
}
/// <summary>
/// Instantiates a <see cref="NativeViewHierarchyOptimizer"/>.
/// </summary>
/// <param name="uiViewOperationQueue">The UI view operation queue.</param>
/// <param name="shadowNodeRegistry">The shadow node registry.</param>
public NativeViewHierarchyOptimizer(
UIViewOperationQueue uiViewOperationQueue,
ShadowNodeRegistry shadowNodeRegistry)
{
_uiViewOperationQueue = uiViewOperationQueue;
_shadowNodeRegistry = shadowNodeRegistry;
_tagsWithLayoutVisited = new Dictionary <int, bool>();
}
/// <summary>
/// Instantiates the <see cref="UIImplementation"/>.
/// </summary>
/// <param name="viewManagers">The view managers.</param>
/// <param name="operationsQueue">The operations queue.</param>
protected UIImplementation(
ViewManagerRegistry viewManagers,
UIViewOperationQueue operationsQueue)
{
_viewManagers = viewManagers;
_operationsQueue = operationsQueue;
_shadowNodeRegistry = new ShadowNodeRegistry();
_nativeViewHierarchyOptimizer = new NativeViewHierarchyOptimizer(
_operationsQueue,
_shadowNodeRegistry);
}
/// <summary>
/// Dispatches a batch of updates.
/// </summary>
/// <param name="uiViewOperationQueue">
/// Interface for enqueueing UI operations.
/// </param>
/// <param name="nativeViewHierarchyOptimizer">
/// Interface for optimizing native hierarchy calls.
/// </param>
internal void DispatchUpdates(
UIViewOperationQueue uiViewOperationQueue,
NativeViewHierarchyOptimizer nativeViewHierarchyOptimizer)
{
if (_nodeUpdated)
{
OnCollectExtraUpdates(uiViewOperationQueue);
}
if (HasNewLayout)
{
nativeViewHierarchyOptimizer.HandleUpdateLayout(this);
}
}
/// <summary>
/// Dispatches a batch of updates.
/// </summary>
/// <param name="absoluteX">
/// The absolute X-position of the node.
/// </param>
/// <param name="absoluteY">
/// The
/// </param>
/// <param name="uiViewOperationQueue">
/// Interface for enqueueing UI operations.
/// </param>
/// <param name="nativeViewHierarchyOptimizer">
/// Interface for optimizing native hierarchy calls.
/// </param>
/// <returns>
/// <code>true</code> if updates were dispatched, otherwise <code>false</code>.
/// </returns>
internal bool DispatchUpdates(
float absoluteX,
float absoluteY,
UIViewOperationQueue uiViewOperationQueue,
NativeViewHierarchyOptimizer nativeViewHierarchyOptimizer)
{
if (_nodeUpdated)
{
OnCollectExtraUpdates(uiViewOperationQueue);
}
if (HasNewLayout)
{
var layoutX = LayoutX;
var layoutY = LayoutY;
var newAbsoluteLeft = (int)Math.Round(absoluteX + layoutX);
var newAbsoluteTop = (int)Math.Round(absoluteY + layoutY);
var newAbsoluteRight = (int)Math.Round(absoluteX + layoutX + LayoutWidth);
var newAbsoluteBottom = (int)Math.Round(absoluteY + layoutY + LayoutHeight);
var newScreenX = (int)Math.Round(layoutX);
var newScreenY = (int)Math.Round(layoutY);
var newScreenWidth = newAbsoluteRight - newAbsoluteLeft;
var newScreenHeight = newAbsoluteBottom - newAbsoluteTop;
var layoutHasChanged =
MustForceLayout ||
newScreenX != ScreenX ||
newScreenY != ScreenY ||
newScreenWidth != ScreenWidth ||
newScreenHeight != ScreenHeight;
ScreenX = newScreenX;
ScreenY = newScreenY;
ScreenWidth = newScreenWidth;
ScreenHeight = newScreenHeight;
if (layoutHasChanged)
{
nativeViewHierarchyOptimizer.HandleUpdateLayout(this);
}
return(layoutHasChanged);
}
else
{
return(false);
}
}
/// <summary>
/// Instantiates the <see cref="UIImplementation"/>.
/// </summary>
/// <param name="reactContext">The React context.</param>
/// <param name="viewManagers">The view managers.</param>
/// <param name="operationsQueue">The operations queue.</param>
/// <param name="eventDispatcher">The event dispatcher.</param>
protected UIImplementation(
ReactContext reactContext,
ViewManagerRegistry viewManagers,
UIViewOperationQueue operationsQueue,
EventDispatcher eventDispatcher)
{
_reactContext = reactContext;
_viewManagers = viewManagers;
_operationsQueue = operationsQueue;
_shadowNodeRegistry = new ShadowNodeRegistry();
_nativeViewHierarchyOptimizer = new NativeViewHierarchyOptimizer(
_operationsQueue,
_shadowNodeRegistry);
_eventDispatcher = eventDispatcher;
}
/// <summary>
/// Dispatches a batch of updates.
/// </summary>
/// <param name="absoluteX">The absolute x-coordinate.</param>
/// <param name="absoluteY">The absolute y-coordinate.</param>
/// <param name="uiViewOperationQueue">
/// Interface for enqueueing UI operations.
/// </param>
/// <param name="nativeViewHierarchyOptimizer">
/// Interface for optimizing native hierarchy calls.
/// </param>
internal void DispatchUpdates(
double absoluteX,
double absoluteY,
UIViewOperationQueue uiViewOperationQueue,
NativeViewHierarchyOptimizer nativeViewHierarchyOptimizer)
{
if (_nodeUpdated)
{
OnCollectExtraUpdates(uiViewOperationQueue);
}
if (HasNewLayout)
{
_absoluteLeft = (int)Math.Round(absoluteX + LayoutX);
_absoluteTop = (int)Math.Round(absoluteY + LayoutY);
_absoluteRight = (int)Math.Round(_absoluteLeft + LayoutWidth);
_absoluteBottom = (int)Math.Round(_absoluteTop + LayoutHeight);
nativeViewHierarchyOptimizer.HandleUpdateLayout(this);
}
}
/// <summary>
/// Called after a layout step at the end of a UI batch from
/// <see cref="UIManagerModule"/>. May be used to enqueue additional UI
/// operations for the native view. Will only be called on nodes marked
/// as updated.
/// </summary>
/// <param name="uiViewOperationQueue">
/// Interface for enqueueing UI operations.
/// </param>
public virtual void OnCollectExtraUpdates(UIViewOperationQueue uiViewOperationQueue)
{
}
