// 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);
}
}
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;
}
}
}