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Using CancellationToken

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This commit is contained in:
Ádám Kovács
2022-02-04 00:17:03 +01:00
parent 3f8309dc0f
commit 2e832f72d2
23 changed files with 1509 additions and 147 deletions
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55
src/Core/FileTime.Core/Components/Tab.cs
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@@ -11,6 +11,9 @@ namespace FileTime.Core.Components
#pragma warning restore CS8618 // Non-nullable field must contain a non-null value when exiting constructor. Consider declaring as nullable.
private string? _lastPath;
private readonly object _guardSetCurrentSelectedItemCTS = new object();
private CancellationTokenSource? _setCurrentSelectedItemCTS;
public int CurrentSelectedIndex { get; private set; }
public AsyncEventHandler CurrentLocationChanged = new();
@@ -21,7 +24,7 @@ namespace FileTime.Core.Components
await SetCurrentLocation(currentPath);
}
public Task<IContainer> GetCurrentLocation()
public Task<IContainer> GetCurrentLocation(CancellationToken token = default)
{
return Task.FromResult(_currentLocation);
}
@@ -49,24 +52,36 @@ namespace FileTime.Core.Components
return Task.FromResult(_currentSelectedItem);
}
public async Task SetCurrentSelectedItem(IItem? value)
public async Task SetCurrentSelectedItem(IItem? value, bool secondary = false)
{
if (_currentSelectedItem != value)
{
IItem? itemToSelect = null;
if (value != null)
{
itemToSelect = (await _currentLocation.GetItems())?.FirstOrDefault(i =>
i.FullName == null && value?.FullName == null
itemToSelect = (await _currentLocation.GetItems())?.FirstOrDefault(i =>
i.FullName == null && value?.FullName == null
? i.Name == value?.Name
: i.FullName == value?.FullName);
if (itemToSelect == null) throw new IndexOutOfRangeException("Provided item does not exists in the current container.");
}
CancellationToken newToken;
lock (_guardSetCurrentSelectedItemCTS)
{
_setCurrentSelectedItemCTS?.Cancel();
_setCurrentSelectedItemCTS = new CancellationTokenSource();
newToken = _setCurrentSelectedItemCTS.Token;
}
_currentSelectedItem = itemToSelect;
_lastPath = GetCommonPath(_lastPath, itemToSelect?.FullName);
CurrentSelectedIndex = await GetItemIndex(itemToSelect);
await CurrentSelectedItemChanged.InvokeAsync(this, AsyncEventArgs.Empty);
var newCurrentSelectedIndex = await GetItemIndex(itemToSelect, newToken);
if (newToken.IsCancellationRequested) return;
CurrentSelectedIndex = newCurrentSelectedIndex;
await CurrentSelectedItemChanged.InvokeAsync(this, AsyncEventArgs.Empty, newToken);
}
}
public async Task<IItem?> GetItemByLastPath(IContainer? container = null)
@@ -85,21 +100,16 @@ namespace FileTime.Core.Components
var itemNameToSelect = _lastPath
.Split(Constants.SeparatorChar)
.Skip(
containerFullName == null
? 0
: containerFullName
.Split(Constants.SeparatorChar)
.Count())
.Skip((containerFullName?.Split(Constants.SeparatorChar).Length) ?? 0)
.FirstOrDefault();
return (await container.GetItems())?.FirstOrDefault(i => i.Name == itemNameToSelect);
}
private string GetCommonPath(string? oldPath, string? newPath)
private static string GetCommonPath(string? oldPath, string? newPath)
{
var oldPathParts = oldPath?.Split(Constants.SeparatorChar) ?? new string[0];
var newPathParts = newPath?.Split(Constants.SeparatorChar) ?? new string[0];
var oldPathParts = oldPath?.Split(Constants.SeparatorChar) ?? Array.Empty<string>();
var newPathParts = newPath?.Split(Constants.SeparatorChar) ?? Array.Empty<string>();
var commonPathParts = new List<string>();
@@ -126,13 +136,13 @@ namespace FileTime.Core.Components
return string.Join(Constants.SeparatorChar, commonPathParts);
}
private async Task HandleCurrentLocationRefresh(object? sender, AsyncEventArgs e)
private async Task HandleCurrentLocationRefresh(object? sender, AsyncEventArgs e, CancellationToken token = default)
{
var currentSelectedName = (await GetCurrentSelectedItem())?.FullName ?? (await GetItemByLastPath())?.FullName;
var currentLocationItems = (await (await GetCurrentLocation()).GetItems())!;
var currentLocationItems = (await (await GetCurrentLocation(token)).GetItems(token))!;
if (currentSelectedName != null)
{
await SetCurrentSelectedItem(currentLocationItems.FirstOrDefault(i => i.FullName == currentSelectedName) ?? currentLocationItems.FirstOrDefault());
await SetCurrentSelectedItem(currentLocationItems.FirstOrDefault(i => i.FullName == currentSelectedName) ?? currentLocationItems[0]);
}
else if (currentLocationItems.Count > 0)
{
@@ -184,7 +194,7 @@ namespace FileTime.Core.Components
if (await GetCurrentSelectedItem() != null)
{
(await GetCurrentLocation())?.Refresh();
(await GetCurrentLocation())?.RefreshAsync();
IItem? newSelectedItem = null;
foreach (var item in currentPossibleItems)
@@ -197,7 +207,7 @@ namespace FileTime.Core.Components
}
}
if(newSelectedItem != null)
if (newSelectedItem != null)
{
newSelectedItem = (await (await GetCurrentLocation()).GetItems())?.FirstOrDefault(i => i.Name == newSelectedItem.Name);
}
@@ -272,11 +282,12 @@ namespace FileTime.Core.Components
public async Task OpenContainer(IContainer container) => await SetCurrentLocation(container);
private async Task<int> GetItemIndex(IItem? item)
private async Task<int> GetItemIndex(IItem? item, CancellationToken token)
{
if (item == null) return -1;
var currentLocationItems = (await (await GetCurrentLocation()).GetItems())!;
var currentLocationItems = (await (await GetCurrentLocation(token)).GetItems(token))!;
if (token.IsCancellationRequested) return -1;
for (var i = 0; i < currentLocationItems.Count; i++)
{
if (currentLocationItems[i] == item) return i;