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Async cancellation support for contact picture loading.

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This commit is contained in:
Burak Kaan Köse
2024-08-24 01:57:36 +02:00
parent 54ee9e5072
commit 5263900620
1 changed files with 43 additions and 40 deletions
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83
Wino.Mail/Controls/ImagePreviewControl.cs
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@@ -1,9 +1,10 @@
using System;
using System.Diagnostics;
using System.IO;
using System.Text.RegularExpressions;
using System.Threading;
using System.Threading.Tasks;
using Fernandezja.ColorHashSharp;
using Serilog;
using Windows.UI;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
@@ -25,7 +26,6 @@ namespace Wino.Controls
public static readonly DependencyProperty FromNameProperty = DependencyProperty.Register(nameof(FromName), typeof(string), typeof(ImagePreviewControl), new PropertyMetadata(string.Empty, OnAddressInformationChanged));
public static readonly DependencyProperty FromAddressProperty = DependencyProperty.Register(nameof(FromAddress), typeof(string), typeof(ImagePreviewControl), new PropertyMetadata(string.Empty, OnAddressInformationChanged));
public static readonly DependencyProperty IsKnownProperty = DependencyProperty.Register(nameof(IsKnown), typeof(bool), typeof(ImagePreviewControl), new PropertyMetadata(false));
public static readonly DependencyProperty SenderContactPictureProperty = DependencyProperty.Register(nameof(SenderContactPicture), typeof(string), typeof(ImagePreviewControl), new PropertyMetadata(string.Empty, new PropertyChangedCallback(OnAddressInformationChanged)));
/// <summary>
@@ -49,18 +49,13 @@ namespace Wino.Controls
set { SetValue(FromAddressProperty, value); }
}
public bool IsKnown
{
get { return (bool)GetValue(IsKnownProperty); }
set { SetValue(IsKnownProperty, value); }
}
#endregion
private Ellipse Ellipse;
private Grid InitialsGrid;
private TextBlock InitialsTextblock;
private Image KnownHostImage;
private CancellationTokenSource contactPictureLoadingCancellationTokenSource;
public ImagePreviewControl()
{
@@ -86,22 +81,31 @@ namespace Wino.Controls
}
private async void UpdateInformation()
{
if (KnownHostImage == null || InitialsGrid == null || InitialsTextblock == null || (string.IsNullOrEmpty(FromName) && string.IsNullOrEmpty(FromAddress)))
return;
// Cancel active image loading if exists.
if (!contactPictureLoadingCancellationTokenSource?.IsCancellationRequested ?? false)
{
contactPictureLoadingCancellationTokenSource.Cancel();
}
var host = ThumbnailService.GetHost(FromAddress);
bool isKnownHost = false;
if (!string.IsNullOrEmpty(host))
{
var tuple = ThumbnailService.CheckIsKnown(host);
IsKnown = tuple.Item1;
isKnownHost = tuple.Item1;
host = tuple.Item2;
}
if (IsKnown)
if (isKnownHost)
{
// Unrealize others.
@@ -116,9 +120,27 @@ namespace Wino.Controls
KnownHostImage.Visibility = Visibility.Collapsed;
InitialsGrid.Visibility = Visibility.Visible;
bool isContactImageLoadingHandled = !string.IsNullOrEmpty(SenderContactPicture) && await TryUpdateProfileImageAsync();
if (!string.IsNullOrEmpty(SenderContactPicture))
{
contactPictureLoadingCancellationTokenSource = new CancellationTokenSource();
if (!isContactImageLoadingHandled)
try
{
var brush = await GetContactImageBrushAsync();
if (!contactPictureLoadingCancellationTokenSource?.Token.IsCancellationRequested ?? false)
{
Ellipse.Fill = brush;
InitialsTextblock.Text = string.Empty;
}
}
catch (Exception)
{
// Log exception.
Debugger.Break();
}
}
else
{
var colorHash = new ColorHash();
var rgb = colorHash.Rgb(FromAddress);
@@ -129,40 +151,21 @@ namespace Wino.Controls
}
}
/// <summary>
/// Tries to update contact image with the provided base64 image string.
/// </summary>
/// <returns>True if updated, false if not.</returns>
private async Task<bool> TryUpdateProfileImageAsync()
private async Task<ImageBrush> GetContactImageBrushAsync()
{
try
{
// Load the image from base64 string.
var bitmapImage = new BitmapImage();
// Load the image from base64 string.
var bitmapImage = new BitmapImage();
var imageArray = Convert.FromBase64String(SenderContactPicture);
var imageStream = new MemoryStream(imageArray);
var randomAccessImageStream = imageStream.AsRandomAccessStream();
var imageArray = Convert.FromBase64String(SenderContactPicture);
var imageStream = new MemoryStream(imageArray);
var randomAccessImageStream = imageStream.AsRandomAccessStream();
randomAccessImageStream.Seek(0);
randomAccessImageStream.Seek(0);
await bitmapImage.SetSourceAsync(randomAccessImageStream);
Ellipse.Fill = new ImageBrush()
{
ImageSource = bitmapImage
};
await bitmapImage.SetSourceAsync(randomAccessImageStream);
InitialsTextblock.Text = string.Empty;
return true;
}
catch (Exception ex)
{
Log.Error(ex, "Failed to load contact image from base64 string.");
}
return false;
return new ImageBrush() { ImageSource = bitmapImage };
}
public string ExtractInitialsFromName(string name)