/// <summary>
/// Remove an item from the <see cref="IPagedDataSet"/> with the specified position
/// </summary>
/// <param name="dataSet">The dataset to modify</param>
/// <param name="offset">The position to remove relative to the dataset's caret</param>
/// <returns></returns>
public static async Task RemoveAtOffset(this IRemovable removable, IPagedDataSet dataSet, int offset)
{
var pi = await dataSet.GetCurrentPageIndex();
var ps = await dataSet.GetPageSize();
var sel = await dataSet.GetSelector();
if (sel == null)
{
throw new InvalidOperationException("The paged data set does not support selecting items that is required for this method to work");
}
await removable.RemoveAt(dataSet, pi *ps + offset + await sel.GetCaretPosition());
}
/// <summary>
/// Add an item into the <see cref="IPagedDataSet"/> with the position relative to the <see cref="ISelectable"/>'s caret
/// </summary>
/// <param name="addable">The adder to perform</param>
/// <param name="item">The item to add</param>
/// <param name="dataSet">the dataset to modify</param>
/// <param name="offset">The position to add relative to the <see cref="IPagedDataSet{TItem, TResult}"/> caret</param>
/// <returns></returns>
public static async Task AddOffset(this IAddable addable, IPagedDataSet dataSet, object item, int offset)
{
var selector = await dataSet.GetSelector();
if (selector == null)
{
throw new InvalidOperationException("PagedDataSet must support selector to use this function!");
}
var pi = await dataSet.GetCurrentPageIndex();
var ps = await dataSet.GetPageSize();
var caret = await selector.GetCaretPosition();
await addable.Add(item, pi *ps + caret + offset);
}
/// <summary>
/// Add an item into the <see cref="IPagedDataSet{TItem, TResult}"/> with the position relative to the <see cref="ISelectable{TItem}"/>'s caret
/// </summary>
/// <param name="addable">The adder to perform</param>
/// <param name="item">The item to add</param>
/// <param name="dataSet">the dataset to modify</param>
/// <param name="offset">The position to add relative to the <see cref="IPagedDataSet{TItem, TResult}"/> caret</param>
/// <returns></returns>
public static Task AddOffset <TItem>(this IAddable <TItem> addable, IPagedDataSet dataSet, TItem item, int offset) where TItem : class
=> AddOffset(addable, dataSet, item, offset);
// TODO: BIGTODO Find a better way to move through pages. This is a very smelly code!
/// <summary>
/// Jump the caret to a new position
/// </summary>
/// <param name="offset">the number of item to jump. A positive value will jump forward, a negative value will jump backward</param>
/// <param name="dataSet">The data set to move caret</param>
/// <param name="throughPage">should overflow offset move to a new page</param>
/// <returns></returns>
public static async Task MoveCaretBy(this ISelectable selectable, IPagedDataSet dataSet, int offset, bool throughPage = false)
{
if (throughPage)
{
var pageCount = await dataSet.GetPageCount();
if (offset > 0)
{
var tempCaret = await selectable.GetCaretPosition();
var tempPageIndex = await dataSet.GetCurrentPageIndex();
var currentPageSize = (await dataSet.GetPageItems()).Count();
if (currentPageSize == 0)
{
return;
}
if (currentPageSize - tempCaret - offset <= 0)
{
offset -= currentPageSize - tempCaret;
tempPageIndex = (tempPageIndex + 1).NormalizeIndex(pageCount);
}
else
{
await selectable.SetCaretPosition(tempCaret + offset);
return;
}
while (true)
{
await dataSet.SetCurrentPageIndex(tempPageIndex);
currentPageSize = (await dataSet.GetPageItems()).Count();
if (offset - currentPageSize >= 0)
{
offset -= currentPageSize;
tempPageIndex = (tempPageIndex + 1).NormalizeIndex(pageCount);
}
else
{
break;
}
}
await dataSet.SetCurrentPageIndex(tempPageIndex);
await selectable.SetCaretPosition(offset);
}
else
{
var tempCaret = await selectable.GetCaretPosition();
var tempPageIndex = await dataSet.GetCurrentPageIndex();
int currentPageSize;
if (tempCaret + offset < 0)
{
offset = Math.Abs(offset) - tempCaret - 1;
tempPageIndex = (tempPageIndex - 1).NormalizeIndex(pageCount);
await dataSet.SetCurrentPageIndex(tempPageIndex);
currentPageSize = (await dataSet.GetPageItems()).Count();
if (currentPageSize == 0)
{
return;
}
tempCaret = currentPageSize - 1;
}
else
{
await selectable.SetCaretPosition(tempCaret + offset);
return;
}
while (true)
{
if (offset - currentPageSize >= 0)
{
offset -= currentPageSize;
tempPageIndex = (tempPageIndex - 1).NormalizeIndex(pageCount);
await dataSet.SetCurrentPageIndex(tempPageIndex);
currentPageSize = (await dataSet.GetPageItems()).Count();
tempCaret = currentPageSize - 1;
}
else
{
break;
}
}
await selectable.SetCaretPosition(tempCaret - offset);
}
}
else
{
await selectable.SetCaretPosition(await selectable.GetCaretPosition() + offset);
}
}
public static Task MovePagedDataSetOffset(this IPaginatorController pie, IPagedDataSet pd, int offset)
{
var index = pie.IndexOf(pd);
return(pie.MovePagedDataSet(pd, index != -1 ? index + offset : offset));
}
public StringPageContentGenerator(IPagedDataSet <TItem, string> pagedDataSet)
{
PagedDataSet = pagedDataSet;
}
public Selectable(IPagedDataSet <TItem, TResult> pagedDataSet)
{
PagedDataSet = pagedDataSet;
}
/// <summary> /// Move item to the last position in the <see cref="IPagedDataSet"/> /// </summary> /// <param name="dataSet">the dataset to move item</param> /// <param name="item">The item to move</param> /// <returns></returns> public static async Task MoveToLast(this IMovable movable, IPagedDataSet dataSet, object item) => await movable.Move(item, (await dataSet.GetDataSource()).Count() - 1);
/// <summary> /// Move item to the first position in the <see cref="IPagedDataSet"/> /// </summary> /// <param name="dataSet">the dataset to move item</param> /// <param name="item">The item to move</param> /// <returns></returns> public static async Task MoveToTop(this IMovable movable, IPagedDataSet dataSet, object item) => await movable.Move(item, 0);
/// <summary> /// Move a item into a new position relative to the current position in the <see cref="IPagedDataSet"/> /// </summary> /// <param name="dataSet">the dataset to move item</param> /// <param name="item">The item to move</param> /// <param name="offset">a new position relative to the current item position</param> /// <returns></returns> public static async Task MoveOffset(this IMovable movable, IPagedDataSet dataSet, object item, int offset) => await movable.Move(item, (await dataSet.GetDataSource()).FindIndex(item) + offset);
/// <summary>
/// Move item to the last position in the <see cref="IPagedDataSet{TItem, TResult}"/>
/// </summary>
/// <param name="dataSet">the dataset to move item</param>
/// <param name="item">The item to move</param>
/// <returns></returns>
public static async Task MoveToLast <TItem>(this IMovable <TItem> movable, IPagedDataSet dataSet, TItem item)
=> await movable.MoveToLast(dataSet, item);
/// <summary>
/// Move a item into a new position relative to the current position in the <see cref="IPagedDataSet{TItem, TResult}"/>
/// </summary>
/// <param name="dataSet">the dataset to move item</param>
/// <param name="item">The item to move</param>
/// <param name="offset">a new position relative to the current item position</param>
/// <returns></returns>
public static async Task MoveOffset <TItem>(this IMovable <TItem> movable, IPagedDataSet dataSet, TItem item, int offset)
=> await movable.MoveOffset(dataSet, item, offset);
public Movable(IPagedDataSet <TItem, TResult> pagedDataSet)
{
PagedDataSet = pagedDataSet;
}
static async Task OldTestCode(IPagedDataSet eventPd)
{
while (true)
{
Console.Clear();
var t = await eventPd.GetPageContent();
Console.WriteLine($"Header: {await t.GetHeader()}");
Console.WriteLine($"Content: {await t.GetContent()}");
Console.Write("Command: ");
var input = Console.ReadKey(true);
if (input.Key == ConsoleKey.RightArrow)
{
await eventPd.MovePageBy(1);
}
else if (input.Key == ConsoleKey.LeftArrow)
{
await eventPd.MovePageBy(-1);
}
else if (input.Key == ConsoleKey.DownArrow)
{
await(await eventPd.GetSelector()).MoveCaretBy(eventPd, 1, true);
}
else if (input.Key == ConsoleKey.UpArrow)
{
await(await eventPd.GetSelector()).MoveCaretBy(eventPd, -1, true);
}
else if (input.Key == ConsoleKey.Spacebar)
{
await(await eventPd.GetSelector()).SetSelectedItem("20");
}
else if (input.Key == ConsoleKey.A)
{
await(await eventPd.GetAdder()).AddOffset(eventPd, $"{DateTime.Now}", 0);
}
else if (input.Key == ConsoleKey.D)
{
await(await eventPd.GetAdder()).Add($"{DateTime.Now}", 0);
}
else if (input.Key == ConsoleKey.X)
{
await(await eventPd.GetRemover()).RemoveAtOffset(eventPd, 0);
}
else if (input.Key == ConsoleKey.Z)
{
await(await eventPd.GetRemover()).RemoveAt(eventPd, 0);
}
else if (input.Key == ConsoleKey.B)
{
await(await eventPd.GetRemover()).Remove("20");
}
else if (input.Key == ConsoleKey.W)
{
await(await eventPd.GetMover()).MoveOffset(eventPd, await(await eventPd.GetSelector()).GetSelectedItem(), -1);
await(await eventPd.GetSelector()).MoveCaretBy(eventPd, -1);
}
else if (input.Key == ConsoleKey.Q)
{
await(await eventPd.GetMover()).MoveToTop(eventPd, await(await eventPd.GetSelector()).GetSelectedItem());
await(await eventPd.GetSelector()).SetCaretPosition(0);
await eventPd.SetCurrentPageIndex(0);
}
else if (input.Key == ConsoleKey.E)
{
await(await eventPd.GetMover()).MoveToLast(eventPd, await(await eventPd.GetSelector()).GetSelectedItem());
await eventPd.SetCurrentPageIndex(await eventPd.GetPageCount() - 1);
await(await eventPd.GetSelector()).SetCaretPosition((await eventPd.GetPageItems()).Count() - 1);
}
else if (input.Key == ConsoleKey.S)
{
await(await eventPd.GetMover()).MoveOffset(eventPd, await(await eventPd.GetSelector()).GetSelectedItem(), 1);
await(await eventPd.GetSelector()).MoveCaretBy(eventPd, 1);
}
else if (input.Key == ConsoleKey.Escape)
{
break;
}
}
}
/// <summary> /// Remove an item from the <see cref="IPagedDataSet"/> with the specified position /// </summary> /// <param name="dataSet">The dataset to modify</param> /// <param name="index">The position to remove</param> /// <returns></returns> public static async Task RemoveAt(this IRemovable removable, IPagedDataSet dataSet, int index) => await removable.Remove((await dataSet.GetDataSource()).ElementAtOrDefault(index));
