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// Copyright (c) .NET Foundation and contributors. All rights reserved. Licensed under the Microsoft Reciprocal License. See LICENSE.TXT file in the project root for full license information.
namespace WixToolset.Converters
{
using System;
using System.Collections.Generic;
using System.Linq;
using System.Xml.Linq;
internal class ConversionLab : IDisposable
{
private readonly XElement targetElement;
private readonly XElement parentElement;
private readonly List<XNode> siblingNodes;
private int index;
public ConversionLab(XElement targetElement)
{
this.targetElement = targetElement;
this.parentElement = this.targetElement.Parent;
this.siblingNodes = this.parentElement.Nodes().ToList();
foreach (var siblingNode in this.siblingNodes)
{
siblingNode.Remove();
}
this.index = this.siblingNodes.IndexOf(this.targetElement);
}
public void RemoveOrphanTextNodes()
{
if (!this.targetElement.HasElements)
{
var childNodes = this.targetElement.Nodes().ToList();
foreach (var childNode in childNodes)
{
childNode.Remove();
}
}
}
public void RemoveTargetElement()
{
if (this.index + 1 < this.siblingNodes.Count
&& this.siblingNodes[this.index + 1] is XText trailingText
&& String.IsNullOrWhiteSpace(trailingText.Value))
{
this.siblingNodes.RemoveAt(this.index + 1);
}
this.siblingNodes.RemoveAt(this.index);
if (0 < this.index
&& this.siblingNodes[this.index - 1] is XText leadingText
&& String.IsNullOrWhiteSpace(leadingText.Value))
{
this.siblingNodes.RemoveAt(this.index - 1);
}
}
public void ReplaceTargetElement(XElement replacement)
{
this.siblingNodes[this.index] = replacement;
}
public void AddCommentsAsSiblings(List<XNode> comments)
{
if (0 < this.index
&& this.siblingNodes[this.index - 1] is XText leadingText
&& String.IsNullOrWhiteSpace(leadingText.Value))
{
var leadingWhitespace = leadingText.Value;
--this.index;
var newComments = new List<XNode>();
foreach(var comment in comments)
{
newComments.Add(new XText(leadingWhitespace));
newComments.Add(comment);
}
comments = newComments;
}
this.siblingNodes.InsertRange(this.index, comments);
this.index = this.siblingNodes.IndexOf(this.targetElement);
}
public void Dispose()
{
this.parentElement.Add(this.siblingNodes);
}
}
}
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