/// <summary>
/// Adds an additional rendering step to <see cref="Steps"/>.
/// </summary>
/// <param name="anchorId">Id of the existing rendering step to which the new step will be anchored.</param>
/// <param name="anchorPos">Position of the new rendering step relative to the one it is anchored to.</param>
/// <param name="step">The new rendering step that should be inserted into the rendering step sequence.</param>
public void AddRenderStep(string anchorId, RenderStepPosition anchorPos, RenderStep step)
{
int anchorIndex = -1;
switch (anchorPos)
{
case RenderStepPosition.Before:
anchorIndex = this.steps.FindIndex(existingStep => existingStep.Id == anchorId);
if (anchorIndex == -1)
{
anchorIndex = 0;
}
break;
case RenderStepPosition.After:
anchorIndex = this.steps.FindIndex(existingStep => existingStep.Id == anchorId);
if (anchorIndex == -1)
{
anchorIndex = this.steps.Count;
}
else
{
anchorIndex++;
}
break;
case RenderStepPosition.First:
anchorIndex = 0;
break;
case RenderStepPosition.Last:
anchorIndex = this.steps.Count;
break;
}
if (anchorIndex != -1)
{
this.steps.Insert(anchorIndex, step);
}
}
/// <summary>
/// Adds an additional rendering step to <see cref="Steps"/>.
/// </summary>
/// <param name="anchorPos">Position of the new rendering step relative to the one it is anchored to.</param>
/// <param name="step">The new rendering step that should be inserted into the rendering step sequence.</param>
public void AddRenderStep(RenderStepPosition anchorPos, RenderStep step)
{
this.AddRenderStep(null, anchorPos, step);
}