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[UX] Added Drag and Drop utils
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@BAndysc
BAndysc committed Nov 19, 2021
1 parent 840c13d commit 55d5dcd
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218 changes: 218 additions & 0 deletions WDE.Common.Test/Utils/DragDrop/DropUtilsTest.cs
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using System.Collections.Generic;
using System.Linq;
using NUnit.Framework;
using WDE.Common.Utils.DragDrop;

namespace WDE.Common.Test.Utils.DragDrop
{
public class DropUtilsTest
{
private List<int> l = null!;

[SetUp]
public void Setup()
{
l = new List<int>() { 1, 2, 3, 4, 5 };
}

private void PerformTest(int dropIndex, int[] expected, params int[] itemsToDrop)
{
var drop = new DropUtils<int>(l, itemsToDrop.ToList(), dropIndex);
drop.DoDrop(l);
CollectionAssert.AreEqual(expected, l);
drop.Undo(l);
CollectionAssert.AreEqual(new int[]{ 1, 2, 3, 4, 5 }, l);
drop.DoDrop(l);
CollectionAssert.AreEqual(expected, l);
}

[Test]
public void TestMove1To0() => PerformTest(0, new []{1, 2, 3, 4, 5}, 1);

[Test]
public void TestMove1To1() => PerformTest(1, new []{1, 2, 3, 4, 5}, 1);

[Test]
public void TestMove1To2() => PerformTest(2, new []{2, 1, 3, 4, 5}, 1);

[Test]
public void TestMove1To3() => PerformTest(3, new []{2, 3, 1, 4, 5}, 1);

[Test]
public void TestMove1To4() => PerformTest(4, new []{2, 3, 4, 1, 5}, 1);

[Test]
public void TestMove1To5() => PerformTest(5, new []{2, 3, 4, 5, 1}, 1);

[Test]
public void TestMove2To0() => PerformTest(0, new []{2, 1, 3, 4, 5}, 2);

[Test]
public void TestMove2To1() => PerformTest(1, new []{1, 2, 3, 4, 5}, 2);

[Test]
public void TestMove2To2() => PerformTest(2, new []{1, 2, 3, 4, 5}, 2);

[Test]
public void TestMove2To3() => PerformTest(3, new []{1, 3, 2, 4, 5}, 2);

[Test]
public void TestMove2To4() => PerformTest(4, new []{1, 3, 4, 2, 5}, 2);

[Test]
public void TestMove2To5() => PerformTest(5, new []{1, 3, 4, 5, 2}, 2);

[Test]
public void TestMove5To0() => PerformTest(0, new []{5, 1, 2, 3, 4}, 5);

[Test]
public void TestMove5To1() => PerformTest(1, new []{1, 5, 2, 3, 4}, 5);

[Test]
public void TestMove5To2() => PerformTest(2, new []{1, 2, 5, 3, 4}, 5);

[Test]
public void TestMove5To3() => PerformTest(3, new []{1, 2, 3, 5, 4}, 5);

[Test]
public void TestMove5To4() => PerformTest(4, new []{1, 2, 3, 4, 5}, 5);

[Test]
public void TestMove5To5() => PerformTest(5, new []{1, 2, 3, 4, 5}, 5);


[Test]
public void TestMove12To0() => PerformTest(0, new []{1, 2, 3, 4, 5}, 1, 2);

[Test]
public void TestMove12To1() => PerformTest(1, new []{1, 2, 3, 4, 5}, 1, 2);

[Test]
public void TestMove12To2() => PerformTest(2, new []{1, 2, 3, 4, 5}, 1, 2);

[Test]
public void TestMove12To3() => PerformTest(3, new []{3, 1, 2, 4, 5}, 1, 2);

[Test]
public void TestMove12To4() => PerformTest(4, new []{3, 4, 1, 2, 5}, 1, 2);

[Test]
public void TestMove12To5() => PerformTest(5, new []{3, 4, 5, 1, 2}, 1, 2);


[Test]
public void TestMove45To0() => PerformTest(0, new []{4, 5, 1, 2, 3}, 4, 5);

[Test]
public void TestMove45To1() => PerformTest(1, new []{1, 4, 5, 2, 3}, 4, 5);

[Test]
public void TestMove45To2() => PerformTest(2, new []{1, 2, 4, 5, 3}, 4, 5);

[Test]
public void TestMove45To3() => PerformTest(3, new []{1, 2, 3, 4, 5}, 4, 5);

[Test]
public void TestMove45To4() => PerformTest(4, new []{1, 2, 3, 4, 5}, 4, 5);

[Test]
public void TestMove45To5() => PerformTest(5, new []{1, 2, 3, 4, 5}, 4, 5);


[Test]
public void TestMove15To0() => PerformTest(0, new []{1, 5, 2, 3, 4}, 1, 5);

[Test]
public void TestMove15To1() => PerformTest(1, new []{1, 5, 2, 3, 4}, 1, 5);

[Test]
public void TestMove15To2() => PerformTest(2, new []{2, 1, 5, 3, 4}, 1, 5);

[Test]
public void TestMove15To3() => PerformTest(3, new []{2, 3, 1, 5, 4}, 1, 5);

[Test]
public void TestMove15To4() => PerformTest(4, new []{2, 3, 4, 1, 5}, 1, 5);

[Test]
public void TestMove15To5() => PerformTest(5, new []{2, 3, 4, 1, 5}, 1, 5);




[Test]
public void TestMove123To0() => PerformTest(0, new []{1, 2, 3, 4, 5}, 1, 2, 3);

[Test]
public void TestMove123To1() => PerformTest(1, new []{1, 2, 3, 4, 5}, 1, 2, 3);

[Test]
public void TestMove123To2() => PerformTest(2, new []{1, 2, 3, 4, 5}, 1, 2, 3);

[Test]
public void TestMove123To3() => PerformTest(3, new []{1, 2, 3, 4, 5}, 1, 2, 3);

[Test]
public void TestMove123To4() => PerformTest(4, new []{4, 1, 2, 3, 5}, 1, 2, 3);

[Test]
public void TestMove123To5() => PerformTest(5, new []{4, 5, 1, 2, 3}, 1, 2, 3);



[Test]
public void TestMove124To0() => PerformTest(0, new []{1, 2, 4, 3, 5}, 1, 2, 4);
[Test]
public void TestMove124To1() => PerformTest(1, new []{1, 2, 4, 3, 5}, 1, 2, 4);
[Test]
public void TestMove124To2() => PerformTest(2, new []{1, 2, 4, 3, 5}, 1, 2, 4);
[Test]
public void TestMove124To3() => PerformTest(3, new []{3, 1, 2, 4, 5}, 1, 2, 4);
[Test]
public void TestMove124To4() => PerformTest(4, new []{3, 1, 2, 4, 5}, 1, 2, 4);
[Test]
public void TestMove124To5() => PerformTest(5, new []{3, 5, 1, 2, 4}, 1, 2, 4);


[Test]
public void TestMove125To0() => PerformTest(0, new []{1, 2, 5, 3, 4}, 1, 2, 5);
[Test]
public void TestMove125To1() => PerformTest(1, new []{1, 2, 5, 3, 4}, 1, 2, 5);
[Test]
public void TestMove125To2() => PerformTest(2, new []{1, 2, 5, 3, 4}, 1, 2, 5);
[Test]
public void TestMove125To3() => PerformTest(3, new []{3, 1, 2, 5, 4}, 1, 2, 5);
[Test]
public void TestMove125To4() => PerformTest(4, new []{3, 4, 1, 2, 5}, 1, 2, 5);
[Test]
public void TestMove125To5() => PerformTest(5, new []{3, 4, 1, 2, 5}, 1, 2, 5);


[Test]
public void TestMove1234To0() => PerformTest(0, new []{1, 2, 3, 4, 5}, 1, 2, 3, 4);
[Test]
public void TestMove1234To1() => PerformTest(1, new []{1, 2, 3, 4, 5}, 1, 2, 3, 4);
[Test]
public void TestMove1234To2() => PerformTest(2, new []{1, 2, 3, 4, 5}, 1, 2, 3, 4);
[Test]
public void TestMove1234To3() => PerformTest(3, new []{1, 2, 3, 4, 5}, 1, 2, 3, 4);
[Test]
public void TestMove1234To4() => PerformTest(4, new []{1, 2, 3, 4, 5}, 1, 2, 3, 4);
[Test]
public void TestMove1234To5() => PerformTest(5, new []{5, 1, 2, 3, 4}, 1, 2, 3, 4);


[Test]
public void TestMove12345To0() => PerformTest(0, new []{1, 2, 3, 4, 5}, 1, 2, 3, 4, 5);
[Test]
public void TestMove12345To1() => PerformTest(1, new []{1, 2, 3, 4, 5}, 1, 2, 3, 4, 5);
[Test]
public void TestMove12345To2() => PerformTest(2, new []{1, 2, 3, 4, 5}, 1, 2, 3, 4, 5);
[Test]
public void TestMove12345To3() => PerformTest(3, new []{1, 2, 3, 4, 5}, 1, 2, 3, 4, 5);
[Test]
public void TestMove12345To4() => PerformTest(4, new []{1, 2, 3, 4, 5}, 1, 2, 3, 4, 5);
[Test]
public void TestMove12345To5() => PerformTest(5, new []{1, 2, 3, 4, 5}, 1, 2, 3, 4, 5);
}
}
59 changes: 59 additions & 0 deletions WoWDatabaseEditor.Common/WDE.Common/Utils/DragDrop/DropUtils.cs
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using System.Collections.Generic;
using System.Diagnostics;

namespace WDE.Common.Utils.DragDrop
{
public class DropUtils<T>
{
private readonly IReadOnlyList<T> originalList;
private readonly IList<T> itemsToDrop;
private readonly int dropIndex;
private readonly int realDropIndex;
private readonly List<(T, int)> itemAndIndices = new();

public DropUtils(IReadOnlyList<T> originalList, IList<T> itemsToDrop, int dropIndex)
{
this.originalList = originalList;
this.itemsToDrop = itemsToDrop;
this.dropIndex = dropIndex;

realDropIndex = dropIndex;
foreach (var item in itemsToDrop)
{
var index = originalList.IndexOf(item);
if (index < dropIndex)
realDropIndex--;
itemAndIndices.Add((item, index));
}

itemAndIndices.Sort((a, b) => a.Item2.CompareTo(b.Item2));
}

public void DoDrop(IList<T> list)
{
foreach (var item in itemsToDrop)
{
list.Remove(item);
}

for (int i = 0; i < itemsToDrop.Count; i++)
{
list.Insert(realDropIndex + i, itemsToDrop[i]);
}
}

public void Undo(IList<T> list)
{
for (int i = 0; i < itemsToDrop.Count; ++i)
{
Debug.Assert(EqualityComparer<T>.Default.Equals(itemsToDrop[i], list[dropIndex]));
list.RemoveAt(realDropIndex);
}

foreach (var pair in itemAndIndices)
{
list.Insert(pair.Item2, pair.Item1);
}
}
}
}

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