public bool AddAdornment(AdornmentPositioningBehavior behavior, SnapshotSpan? visualSpan, object tag, UIElement adornment, AdornmentRemovedCallback removedCallback) {
if (adornment == null)
throw new ArgumentNullException(nameof(adornment));
if (visualSpan == null && behavior == AdornmentPositioningBehavior.TextRelative)
throw new ArgumentNullException(nameof(visualSpan));
if ((uint)behavior > (uint)AdornmentPositioningBehavior.TextRelative)
throw new ArgumentOutOfRangeException(nameof(behavior));
if (layerKind != LayerKind.Normal) {
if (behavior != AdornmentPositioningBehavior.OwnerControlled)
throw new ArgumentOutOfRangeException(nameof(behavior), "Special layers must use AdornmentPositioningBehavior.OwnerControlled");
if (visualSpan != null)
throw new ArgumentOutOfRangeException(nameof(visualSpan), "Special layers must use a null visual span");
}
bool canAdd = visualSpan == null || TextView.TextViewLines.IntersectsBufferSpan(visualSpan.Value);
if (canAdd) {
var layerElem = new AdornmentLayerElement(behavior, visualSpan, tag, adornment, removedCallback);
layerElem.OnLayoutChanged(TextView.TextSnapshot);
Children.Add(layerElem.Adornment);
adornmentLayerElements.Add(layerElem);
}
return canAdd;
}
public bool AddAdornment(AdornmentPositioningBehavior behavior, SnapshotSpan?visualSpan, object tag, UIElement adornment, AdornmentRemovedCallback?removedCallback)
{
if (adornment is null)
{
throw new ArgumentNullException(nameof(adornment));
}
if (visualSpan is null && behavior == AdornmentPositioningBehavior.TextRelative)
{
throw new ArgumentNullException(nameof(visualSpan));
}
if ((uint)behavior > (uint)AdornmentPositioningBehavior.TextRelative)
{
throw new ArgumentOutOfRangeException(nameof(behavior));
}
if (layerKind != LayerKind.Normal)
{
if (behavior != AdornmentPositioningBehavior.OwnerControlled)
{
throw new ArgumentOutOfRangeException(nameof(behavior), "Special layers must use AdornmentPositioningBehavior.OwnerControlled");
}
if (visualSpan is not null)
{
throw new ArgumentOutOfRangeException(nameof(visualSpan), "Special layers must use a null visual span");
}
}
bool canAdd = visualSpan is null || TextView.TextViewLines.IntersectsBufferSpan(visualSpan.Value);
if (canAdd)
{
var layerElem = new AdornmentLayerElement(behavior, visualSpan, tag, adornment, removedCallback);
layerElem.OnLayoutChanged(TextView.TextSnapshot);
Children.Add(layerElem.Adornment);
adornmentLayerElements.Add(layerElem);
}
return(canAdd);
}