private void OnUriSourceChanged()
{
if (Parent == null)
{
// If the parent is not present we can wait for OnAttachedToWindow to call again.
return;
}
ResetImage();
if (!UriSource.HasValue())
{
return;
}
var newUri = new Uri(UriSource);
if (newUri.Scheme == "resource" ||
newUri.IsFile ||
newUri.IsLocalResource())
{
SetImageResource(GetResourceId(newUri.PathAndQuery.TrimStart(new[] { '/' })));
}
else if (UriSource.StartsWith("res:///", StringComparison.OrdinalIgnoreCase))
{
int resourceId;
if (int.TryParse(UriSource.Replace("res:///", ""), out resourceId))
{
SetImageResource(resourceId);
}
else
{
this.Log().WarnFormat("Failed to load asset resource [{0}]", UriSource);
}
}
else if (UriSource.StartsWith("file://", StringComparison.OrdinalIgnoreCase) || newUri.IsAppData())
{
if (_targetHeight <= 0 || _targetWidth <= 0)
{
_sourceUpdateRequired = true;
return;
}
var filePath = newUri.IsAppData() ?
AppDataUriEvaluator.ToPath(newUri) :
UriSource.TrimStart("file://", StringComparison.OrdinalIgnoreCase);
var options = new BitmapFactory.Options();
options.InJustDecodeBounds = true;
BitmapFactory.DecodeFile(filePath, options).SafeDispose();
var sampleSize = CalculateInSampleSize(options, _targetWidth, _targetHeight);
options.InJustDecodeBounds = false;
#pragma warning disable CS0618 // Type or member is obsolete
options.InPurgeable = true;
#pragma warning restore CS0618 // Type or member is obsolete
options.InSampleSize = sampleSize;
var bitmap = BitmapFactory.DecodeFile(filePath, options);
if (_currentBitmap != bitmap)
{
SetImageBitmap(bitmap);
}
}
else
{
_download.Disposable = CoreDispatcher.Main
.RunAsync(
CoreDispatcherPriority.Normal,
async(ct) =>
{
var localUri = UriSource;
using (var b = await DownloadImage(localUri, _targetWidth, _targetHeight, ct))
{
if (!ct.IsCancellationRequested && b != null)
{
if (_currentBitmap != b)
{
SetImageBitmap(b);
}
if (this.Log().IsEnabled(Microsoft.Extensions.Logging.LogLevel.Debug))
{
this.Log().DebugFormat("Bitmap set {0}", localUri);
}
if (_isInteractive)
{
_saveScale = 1f;
OnDrawableChanged();
}
}
else if (b == null && ImageLoader == null)
{
// The bitmap may be null if the image loader has already set the image from
this.Log().Warn("Bitmap is null after image download");
}
}
}
);
}
}
private void OnUriSourceChanged()
{
ResetImage();
if (!UriSource.HasValue())
{
return;
}
var newUri = new Uri(UriSource);
if (newUri.Scheme == "resource")
{
Resource = GetResourceId(newUri.PathAndQuery.TrimStart('/'));
}
else if (UriSource.StartsWith("res:///", StringComparison.OrdinalIgnoreCase))
{
int resourceId;
if (int.TryParse(UriSource.Replace("res:///", ""), out resourceId))
{
Resource = resourceId;
}
else
{
if (this.Log().IsEnabled(LogLevel.Warning))
{
this.Log().WarnFormat("Failed to load asset resource [{0}]", UriSource);
}
}
}
else if (UriSource.StartsWith("file://", StringComparison.OrdinalIgnoreCase))
{
var filePath = UriSource.TrimStart("file://", StringComparison.OrdinalIgnoreCase);
var options = new BitmapFactory.Options();
options.InJustDecodeBounds = true;
BitmapFactory.DecodeFile(filePath, options).SafeDispose();
var sampleSize = CalculateInSampleSize(options, TargetWidth, TargetHeight);
options.InJustDecodeBounds = false;
options.InPurgeable = true;
options.InSampleSize = sampleSize;
CurrentBitmap = BitmapFactory.DecodeFile(filePath, options);
}
else
{
#if !IS_UNO
_download.Disposable = new CoreDispatcherScheduler(CoreDispatcher.Main, CoreDispatcherPriority.Normal)
.ScheduleAsync((object)null, async(s, state, ct) =>
{
var localUri = UriSource;
var b = await DownloadImage(localUri, TargetWidth, TargetHeight, ct);
if (!ct.IsCancellationRequested && b != null)
{
CurrentBitmap = b;
ImageDownloaded();
if (this.Log().IsEnabled(Microsoft.Extensions.Logging.LogLevel.Debug))
{
this.Log().DebugFormat("Bitmap set {0}", localUri);
}
}
else if (b == null && ImageLoader == null)
{
// The bitmap may be null if the image loader has already set the image from
if (this.Log().IsEnabled(LogLevel.Warning))
{
this.Log().Warn("Bitmap is null after image download");
}
}
}
);
#endif
}
}
