internal ProjectItem MoveToInsertionPoint(ProjectItem itemToMove, TreeItemInsertionRule insertionRule,
ProjectItem insertionPoint = null, int relativePosition = -1)
{
switch (insertionRule)
{
case TreeItemInsertionRule.AsSiblingBeforeInsertionPoint:
this.ChangeParentAndPosition(itemToMove, newParent: insertionPoint.Parent,
newPosition: insertionPoint.Position);
return(itemToMove);
case TreeItemInsertionRule.AsSiblingAfterInsertionPoint:
int branchLastItemPosition = GetBranchLastItem(insertionPoint).Position;
this.ChangeParentAndPosition(itemToMove, newParent: insertionPoint.Parent,
newPosition: branchLastItemPosition + 1);
return(itemToMove);
case TreeItemInsertionRule.AsChildAsFirstNode:
this.ChangeParentAndPosition(itemToMove, newParent: insertionPoint,
newPosition: insertionPoint.Position + 1);
return(itemToMove);
case TreeItemInsertionRule.AsChildAsLastNode:
branchLastItemPosition = GetBranchLastItem(insertionPoint).Position;
this.ChangeParentAndPosition(itemToMove, newParent: insertionPoint,
newPosition: branchLastItemPosition + 1);
return(itemToMove);
case TreeItemInsertionRule.AsChildAtPosition:
Assertion.Require(relativePosition > 0, "Relative position must be greater than zero.");
this.ChangeParentAndPosition(itemToMove, newParent: insertionPoint,
newPosition: insertionPoint.Position + 1 + relativePosition);
return(itemToMove);
case TreeItemInsertionRule.AsTreeRootAtStart:
this.ChangePosition(itemToMove, 1);
return(itemToMove);
case TreeItemInsertionRule.AsTreeRootAtEnd:
return(itemToMove);
case TreeItemInsertionRule.AtRelativePosition:
Assertion.Require(relativePosition > 0, "Relative position must be greater than zero.");
int indexOfInsertionPoint = this.itemsList.IndexOf(insertionPoint);
this.itemsList.Remove(itemToMove);
itemToMove.SetPosition(indexOfInsertionPoint + relativePosition + 1);
this.itemsList.Insert(indexOfInsertionPoint + relativePosition, itemToMove);
EmpiriaLog.Trace($"Item {itemToMove.Name} inserted at position {indexOfInsertionPoint}/{relativePosition}: [{itemToMove.Position}] // {insertionPoint.Name}.");
this.RefreshPositions();
return(itemToMove);
default:
throw Assertion.EnsureNoReachThisCode($"Unrecognized insertion rule '{insertionRule.ToString()}'.");
}
}
static private int SetNewActivityInsertionRule(ProjectItemStateChange toInsertActivity,
WhatIfResult current, WhatIfResult newModelResult)
{
int position = -1;
var parent = current.StateChanges.Find(x => !x.ProjectItem.IsEmptyInstance &&
x.Template.UID == toInsertActivity.Template.Parent.UID);
if (parent != null)
{
var newSiblings = current.StateChanges.FindAll(x => x.ProjectItem.IsEmptyInstance &&
x.ParentStateChange.UID == parent.UID);
var parentIndex = current.StateChanges.IndexOf(parent);
var currentSiblings = current.StateChanges.FindAll(x => !x.ProjectItem.IsEmptyInstance &&
x.ProjectItem.Parent.UID == parent.ProjectItem.UID);
if (currentSiblings.Count != 0)
{
toInsertActivity.InsertionPoint = parent.ProjectItem;
toInsertActivity.InsertionRule = TreeItemInsertionRule.AsChildAsLastNode;
position = parentIndex + currentSiblings.Count + newSiblings.Count + 1;
EmpiriaLog.Trace($"Rule 0: {toInsertActivity.Template.Name} at position {position}.");
}
else
{
toInsertActivity.ParentStateChange = parent;
toInsertActivity.InsertionPoint = parent.ProjectItem;
toInsertActivity.InsertionRule = TreeItemInsertionRule.AsChildAsLastNode;
position = parentIndex + newSiblings.Count + 1;
EmpiriaLog.Trace($"Rule 1: {toInsertActivity.Template.Name} at position {position}.");
}
}
else
{
Assertion.Require(toInsertActivity.ParentStateChange, nameof(toInsertActivity.ParentStateChange));
var newParent = current.StateChanges.Find(x => x.UID == toInsertActivity.ParentStateChange.UID);
var newParentIdx = current.StateChanges.IndexOf(newParent);
var currentSiblings = current.StateChanges.FindAll(x => x.ParentStateChange != null &&
x.ParentStateChange.UID == toInsertActivity.ParentStateChange.UID);
toInsertActivity.ParentStateChange = newParent;
toInsertActivity.InsertionPoint = ProjectItem.Empty;
toInsertActivity.InsertionRule = TreeItemInsertionRule.AsChildAsLastNode;
position = newParentIdx + currentSiblings.Count + 1;
EmpiriaLog.Trace($"Rule 2: {toInsertActivity.Template.Name} at position {position}.");
}
return(position);
}