/// <summary>
/// Preloads the image request into memory cache/disk cache for future use.
/// IMPORTANT: It throws image loading exceptions - you should handle them
/// </summary>
/// <param name="parameters">Image parameters.</param>
public static Task PreloadAsync(this TaskParameter parameters)
{
var tcs = new TaskCompletionSource <IScheduledWork>();
if (parameters.Priority == null)
{
parameters.WithPriority(LoadingPriority.Low);
}
parameters.Preload = true;
var task = ImageService.CreateTask(parameters);
var userErrorCallback = parameters.OnError;
var finishCallback = parameters.OnFinish;
parameters
.Error(ex =>
{
tcs.TrySetException(ex);
userErrorCallback?.Invoke(ex);
})
.Finish(scheduledWork =>
{
finishCallback?.Invoke(scheduledWork);
tcs.TrySetResult(scheduledWork);
});
ImageService.Instance.LoadImage(task);
return(tcs.Task);
}
/// <summary>
/// Preload the image request into memory cache/disk cache for future use.
/// </summary>
/// <param name="parameters">Image parameters.</param>
public static Task PreloadAsync(this TaskParameter parameters)
{
var tcs = new TaskCompletionSource <IScheduledWork>();
if (parameters.Priority == null)
{
parameters.WithPriority(LoadingPriority.Low);
}
var userErrorCallback = parameters.OnError;
var finishCallback = parameters.OnFinish;
parameters.Preload = true;
parameters
.Error(ex =>
{
userErrorCallback(ex);
tcs.SetException(ex);
})
.Finish(scheduledWork =>
{
finishCallback(scheduledWork);
tcs.TrySetResult(scheduledWork); // we should use TrySetResult since SetException could have been called earlier. It is not allowed to set result after SetException
});
var target = new Target <BitmapDrawable, ImageLoaderTask>();
var task = CreateTask(parameters, target);
ImageService.Instance.LoadImage(task);
return(tcs.Task);
}
public static Task PreloadAsync(this TaskParameter parameters)
{
TaskCompletionSource <IScheduledWork> tcs = new TaskCompletionSource <IScheduledWork>();
if (!parameters.Priority.HasValue)
{
parameters.WithPriority(LoadingPriority.Low);
}
parameters.Preload = true;
IImageLoaderTask task = ImageService.CreateTask(parameters);
Action <Exception> userErrorCallback = parameters.OnError;
Action <IScheduledWork> finishCallback = parameters.OnFinish;
parameters.Error(delegate(Exception ex)
{
tcs.TrySetException(ex);
userErrorCallback?.Invoke(ex);
}).Finish(delegate(IScheduledWork scheduledWork)
{
finishCallback?.Invoke(scheduledWork);
tcs.TrySetResult(scheduledWork);
});
ImageService.Instance.LoadImage(task);
return(tcs.Task);
}
public static IImageLoaderTask Preload(this TaskParameter parameters)
{
if (!parameters.Priority.HasValue)
{
parameters.WithPriority(LoadingPriority.Low);
}
parameters.Preload = true;
IImageLoaderTask imageLoaderTask = ImageService.CreateTask(parameters);
ImageService.Instance.LoadImage(imageLoaderTask);
return(imageLoaderTask);
}
/// <summary>
/// Preloads the image request into memory cache/disk cache for future use.
/// </summary>
/// <param name="parameters">Image parameters.</param>
public static void Preload(this TaskParameter parameters)
{
if (parameters.Priority == null)
{
parameters.WithPriority(LoadingPriority.Low);
}
parameters.Preload = true;
var target = new Target <BitmapDrawable, ImageLoaderTask>();
var task = CreateTask(parameters, target);
ImageService.Instance.LoadImage(task);
}
/// <summary>
/// Preloads the image request into memory cache/disk cache for future use.
/// </summary>
/// <param name="parameters">Image parameters.</param>
public static IImageLoaderTask Preload(this TaskParameter parameters)
{
if (parameters.Priority == null)
{
parameters.WithPriority(LoadingPriority.Low);
}
parameters.Preload = true;
var task = ImageService.CreateTask(parameters);
ImageService.Instance.LoadImage(task);
return(task);
}
/// <summary>
/// Preloads the image request into memory cache/disk cache for future use.
/// </summary>
/// <param name="parameters">Image parameters.</param>
public static void Preload(this TaskParameter parameters)
{
if (parameters.Priority == null)
{
parameters.WithPriority(LoadingPriority.Low);
}
parameters.Preload = true;
var target = new Target <UIImage, object>();
var task = CreateTask(parameters, 1f, target);
ImageService.Instance.LoadImage(task);
}
/// <summary>
/// Preloads the image request into memory cache/disk cache for future use.
/// </summary>
/// <param name="parameters">Image parameters.</param>
public static IImageLoaderTask Preload(this TaskParameter parameters)
{
if (parameters.Priority == null)
{
parameters.WithPriority(LoadingPriority.Low);
}
parameters.Preload = true;
var target = new Target <WriteableBitmap, object>();
var task = CreateTask(parameters, target);
ImageService.Instance.LoadImage(task);
return(task);
}
/// <summary>
/// Preloads the image request into memory cache/disk cache for future use.
/// IMPORTANT: It throws image loading exceptions - you should handle them
/// </summary>
/// <param name="parameters">Image parameters.</param>
public static Task PreloadAsync(this TaskParameter parameters)
{
var tcs = new TaskCompletionSource <IScheduledWork>();
if (parameters.Priority == null)
{
parameters.WithPriority(LoadingPriority.Low);
}
var userErrorCallback = parameters.OnError;
var finishCallback = parameters.OnFinish;
List <Exception> exceptions = null;
parameters.Preload = true;
parameters
.Error(ex =>
{
if (exceptions == null)
{
exceptions = new List <Exception>();
}
exceptions.Add(ex);
userErrorCallback?.Invoke(ex);
})
.Finish(scheduledWork =>
{
finishCallback?.Invoke(scheduledWork);
if (exceptions != null)
{
tcs.TrySetException(exceptions);
}
else
{
tcs.TrySetResult(scheduledWork);
}
});
var target = new Target <WriteableBitmap, object>();
var task = CreateTask(parameters, target);
ImageService.Instance.LoadImage(task);
return(tcs.Task);
}
private async void LoadImage()
{
if (_currentTask != null)
{
_currentTask.Cancel();
}
TaskParameter imageLoader = null;
var ffSource = await FFImageSourceBinding.GetImageSourceBinding(Source).ConfigureAwait(false);
if (ffSource == null)
{
if (internalImage != null)
{
await MainThreadDispatcher.Instance.PostAsync(() => {
internalImage.Source = null;
});
}
}
else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.Url)
{
imageLoader = ImageService.Instance.LoadUrl(ffSource.Path, TimeSpan.FromDays(CacheDuration));
}
else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.CompiledResource)
{
imageLoader = ImageService.Instance.LoadCompiledResource(ffSource.Path);
}
else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.ApplicationBundle)
{
imageLoader = ImageService.Instance.LoadFileFromApplicationBundle(ffSource.Path);
}
else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.Filepath)
{
imageLoader = ImageService.Instance.LoadFile(ffSource.Path);
}
if (imageLoader != null)
{
// CustomKeyFactory
if (CacheKeyFactory != null)
{
var dataContext = DataContext;
imageLoader.CacheKey(CacheKeyFactory.GetKey(Source, dataContext));
}
// LoadingPlaceholder
if (LoadingPlaceholder != null)
{
var placeholderSource = await FFImageSourceBinding.GetImageSourceBinding(LoadingPlaceholder);
if (placeholderSource != null)
{
imageLoader.LoadingPlaceholder(placeholderSource.Path, placeholderSource.ImageSource);
}
}
// ErrorPlaceholder
if (ErrorPlaceholder != null)
{
var placeholderSource = await FFImageSourceBinding.GetImageSourceBinding(ErrorPlaceholder);
if (placeholderSource != null)
{
imageLoader.ErrorPlaceholder(placeholderSource.Path, placeholderSource.ImageSource);
}
}
// Downsample
if (DownsampleToViewSize && (Width > 0 || Height > 0))
{
if (Height > Width)
{
imageLoader.DownSampleInDip(height: (int)Height);
}
else
{
imageLoader.DownSampleInDip(width: (int)Width);
}
}
else if (DownsampleToViewSize && (MinWidth > 0 || MinHeight > 0))
{
if (MinHeight > MinWidth)
{
imageLoader.DownSampleInDip(height: (int)MinHeight);
}
else
{
imageLoader.DownSampleInDip(width: (int)MinWidth);
}
}
else if ((int)DownsampleHeight != 0 || (int)DownsampleWidth != 0)
{
if (DownsampleHeight > DownsampleWidth)
{
if (DownsampleUseDipUnits)
{
imageLoader.DownSampleInDip(height: (int)DownsampleHeight);
}
else
{
imageLoader.DownSample(height: (int)DownsampleHeight);
}
}
else
{
if (DownsampleUseDipUnits)
{
imageLoader.DownSampleInDip(width: (int)DownsampleWidth);
}
else
{
imageLoader.DownSample(width: (int)DownsampleWidth);
}
}
}
// Downsample mode
imageLoader.DownSampleMode(DownsampleMode);
// RetryCount
if (RetryCount > 0)
{
imageLoader.Retry(RetryCount, RetryDelay);
}
// FadeAnimation
imageLoader.FadeAnimation(FadeAnimationEnabled);
// TransformPlaceholders
imageLoader.TransformPlaceholders(TransformPlaceholders);
// Transformations
if (Transformations != null && Transformations.Count != 0)
{
imageLoader.Transform(Transformations);
}
imageLoader.WithPriority(LoadingPriority);
imageLoader.WithCache(CacheType);
imageLoader.Finish((work) =>
OnFinish(new Args.FinishEventArgs(work)));
imageLoader.Success((imageInformation, loadingResult) =>
OnSuccess(new Args.SuccessEventArgs(imageInformation, loadingResult)));
imageLoader.Error((exception) =>
OnError(new Args.ErrorEventArgs(exception)));
_currentTask = imageLoader.Into(internalImage);
}
}
private async void UpdateSource()
{
((Xamarin.Forms.IElementController)Element).SetValueFromRenderer(CachedImage.IsLoadingPropertyKey, true);
Xamarin.Forms.ImageSource source = Element.Source;
Cancel();
TaskParameter imageLoader = null;
var ffSource = await ImageSourceBinding.GetImageSourceBinding(source).ConfigureAwait(false);
if (ffSource == null)
{
if (Control != null)
{
Control.Source = null;
}
ImageLoadingFinished(Element);
}
else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.Url)
{
imageLoader = ImageService.Instance.LoadUrl(ffSource.Path, Element.CacheDuration);
}
else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.CompiledResource)
{
imageLoader = ImageService.Instance.LoadCompiledResource(ffSource.Path);
}
else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.ApplicationBundle)
{
imageLoader = ImageService.Instance.LoadFileFromApplicationBundle(ffSource.Path);
}
else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.Filepath)
{
imageLoader = ImageService.Instance.LoadFile(ffSource.Path);
}
else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.Stream)
{
imageLoader = ImageService.Instance.LoadStream(ffSource.Stream);
}
if (imageLoader != null)
{
// CustomKeyFactory
if (Element.CacheKeyFactory != null)
{
var bindingContext = Element.BindingContext;
imageLoader.CacheKey(Element.CacheKeyFactory.GetKey(source, bindingContext));
}
// LoadingPlaceholder
if (Element.LoadingPlaceholder != null)
{
var placeholderSource = await ImageSourceBinding.GetImageSourceBinding(Element.LoadingPlaceholder).ConfigureAwait(false);
if (placeholderSource != null)
{
imageLoader.LoadingPlaceholder(placeholderSource.Path, placeholderSource.ImageSource);
}
}
// ErrorPlaceholder
if (Element.ErrorPlaceholder != null)
{
var placeholderSource = await ImageSourceBinding.GetImageSourceBinding(Element.ErrorPlaceholder).ConfigureAwait(false);
if (placeholderSource != null)
{
imageLoader.ErrorPlaceholder(placeholderSource.Path, placeholderSource.ImageSource);
}
}
// Downsample
if (Element.DownsampleToViewSize && (Element.Width > 0 || Element.Height > 0))
{
if (Element.Height > Element.Width)
{
imageLoader.DownSample(height: Element.Height.PointsToPixels());
}
else
{
imageLoader.DownSample(width: Element.Width.PointsToPixels());
}
}
else if (Element.DownsampleToViewSize && (Element.WidthRequest > 0 || Element.HeightRequest > 0))
{
if (Element.HeightRequest > Element.WidthRequest)
{
imageLoader.DownSample(height: Element.HeightRequest.PointsToPixels());
}
else
{
imageLoader.DownSample(width: Element.WidthRequest.PointsToPixels());
}
}
else if ((int)Element.DownsampleHeight != 0 || (int)Element.DownsampleWidth != 0)
{
if (Element.DownsampleHeight > Element.DownsampleWidth)
{
imageLoader.DownSample(height: Element.DownsampleUseDipUnits
? Element.DownsampleHeight.PointsToPixels() : (int)Element.DownsampleHeight);
}
else
{
imageLoader.DownSample(width: Element.DownsampleUseDipUnits
? Element.DownsampleWidth.PointsToPixels() : (int)Element.DownsampleWidth);
}
}
// RetryCount
if (Element.RetryCount > 0)
{
imageLoader.Retry(Element.RetryCount, Element.RetryDelay);
}
// TransparencyChannel
if (Element.TransparencyEnabled.HasValue)
{
imageLoader.TransparencyChannel(Element.TransparencyEnabled.Value);
}
// FadeAnimation
if (Element.FadeAnimationEnabled.HasValue)
{
imageLoader.FadeAnimation(Element.FadeAnimationEnabled.Value);
}
// TransformPlaceholders
if (Element.TransformPlaceholders.HasValue)
{
imageLoader.TransformPlaceholders(Element.TransformPlaceholders.Value);
}
// Transformations
if (Element.Transformations != null && Element.Transformations.Count > 0)
{
imageLoader.Transform(Element.Transformations);
}
imageLoader.WithPriority(Element.LoadingPriority);
if (Element.CacheType.HasValue)
{
imageLoader.WithCache(Element.CacheType.Value);
}
if (Element.LoadingDelay.HasValue)
{
imageLoader.Delay(Element.LoadingDelay.Value);
}
var element = Element;
imageLoader.Finish((work) =>
{
element.OnFinish(new CachedImageEvents.FinishEventArgs(work));
ImageLoadingFinished(element);
});
imageLoader.Success((imageInformation, loadingResult) =>
element.OnSuccess(new CachedImageEvents.SuccessEventArgs(imageInformation, loadingResult)));
imageLoader.Error((exception) =>
element.OnError(new CachedImageEvents.ErrorEventArgs(exception)));
imageLoader.DownloadStarted((downloadInformation) =>
element.OnDownloadStarted(new CachedImageEvents.DownloadStartedEventArgs(downloadInformation)));
_currentTask = imageLoader.Into(Control);
}
}
private void UpdateBitmap(CachedImage previous = null)
{
if (previous == null || !object.Equals(previous.Source, Element.Source))
{
Xamarin.Forms.ImageSource source = Element.Source;
var imageView = Control;
if (imageView == null)
{
return;
}
((IElementController)Element).SetValueFromRenderer(CachedImage.IsLoadingPropertyKey, true);
if (Element != null && object.Equals(Element.Source, source) && !_isDisposed)
{
Cancel();
TaskParameter imageLoader = null;
var ffSource = ImageSourceBinding.GetImageSourceBinding(source);
if (ffSource == null)
{
if (imageView != null)
{
imageView.SetImageDrawable(null);
}
ImageLoadingFinished(Element);
}
else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.Url)
{
imageLoader = ImageService.Instance.LoadUrl(ffSource.Path, Element.CacheDuration);
}
else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.CompiledResource)
{
imageLoader = ImageService.Instance.LoadCompiledResource(ffSource.Path);
}
else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.ApplicationBundle)
{
imageLoader = ImageService.Instance.LoadFileFromApplicationBundle(ffSource.Path);
}
else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.Filepath)
{
imageLoader = ImageService.Instance.LoadFile(ffSource.Path);
}
else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.Stream)
{
imageLoader = ImageService.Instance.LoadStream(ffSource.Stream);
}
if (imageLoader != null)
{
// CustomKeyFactory
if (Element.CacheKeyFactory != null)
{
var bindingContext = Element.BindingContext;
imageLoader.CacheKey(Element.CacheKeyFactory.GetKey(source, bindingContext));
}
// LoadingPlaceholder
if (Element.LoadingPlaceholder != null)
{
var placeholderSource = ImageSourceBinding.GetImageSourceBinding(Element.LoadingPlaceholder);
if (placeholderSource != null)
{
imageLoader.LoadingPlaceholder(placeholderSource.Path, placeholderSource.ImageSource);
}
}
// ErrorPlaceholder
if (Element.ErrorPlaceholder != null)
{
var placeholderSource = ImageSourceBinding.GetImageSourceBinding(Element.ErrorPlaceholder);
if (placeholderSource != null)
{
imageLoader.ErrorPlaceholder(placeholderSource.Path, placeholderSource.ImageSource);
}
}
// Downsample
if (Element.DownsampleToViewSize && (Element.Width > 0 || Element.Height > 0))
{
if (Element.Height > Element.Width)
{
imageLoader.DownSample(height: Element.Height.DpToPixels());
}
else
{
imageLoader.DownSample(width: Element.Width.DpToPixels());
}
}
else if (Element.DownsampleToViewSize && (Element.WidthRequest > 0 || Element.HeightRequest > 0))
{
if (Element.HeightRequest > Element.WidthRequest)
{
imageLoader.DownSample(height: Element.HeightRequest.DpToPixels());
}
else
{
imageLoader.DownSample(width: Element.WidthRequest.DpToPixels());
}
}
else if ((int)Element.DownsampleHeight != 0 || (int)Element.DownsampleWidth != 0)
{
if (Element.DownsampleHeight > Element.DownsampleWidth)
{
imageLoader.DownSample(height: Element.DownsampleUseDipUnits
? Element.DownsampleHeight.DpToPixels() : (int)Element.DownsampleHeight);
}
else
{
imageLoader.DownSample(width: Element.DownsampleUseDipUnits
? Element.DownsampleWidth.DpToPixels() : (int)Element.DownsampleWidth);
}
}
// RetryCount
if (Element.RetryCount > 0)
{
imageLoader.Retry(Element.RetryCount, Element.RetryDelay);
}
// TransparencyChannel
if (Element.TransparencyEnabled.HasValue)
{
imageLoader.TransparencyChannel(Element.TransparencyEnabled.Value);
}
// FadeAnimation
if (Element.FadeAnimationEnabled.HasValue)
{
imageLoader.FadeAnimation(Element.FadeAnimationEnabled.Value);
}
// TransformPlaceholders
if (Element.TransformPlaceholders.HasValue)
{
imageLoader.TransformPlaceholders(Element.TransformPlaceholders.Value);
}
// Transformations
if (Element.Transformations != null && Element.Transformations.Count > 0)
{
imageLoader.Transform(Element.Transformations);
}
imageLoader.WithPriority(Element.LoadingPriority);
var element = Element;
imageLoader.Finish((work) => {
element.OnFinish(new CachedImageEvents.FinishEventArgs(work));
ImageLoadingFinished(element);
});
imageLoader.Success((imageInformation, loadingResult) =>
element.OnSuccess(new CachedImageEvents.SuccessEventArgs(imageInformation, loadingResult)));
imageLoader.Error((exception) =>
element.OnError(new CachedImageEvents.ErrorEventArgs(exception)));
_currentTask = imageLoader.Into(imageView);
}
}
}
}
protected virtual void UpdateImageLoadingTask()
{
var ffSource = GetImageSourceBinding(ImagePath, ImageStream);
var placeholderSource = GetImageSourceBinding(LoadingPlaceholderImagePath, null);
Cancel();
TaskParameter imageLoader = null;
if (ffSource == null)
{
_internalImage.Source = null;
IsLoading = false;
return;
}
IsLoading = true;
if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.Url)
{
imageLoader = ImageService.Instance.LoadUrl(ffSource.Path, CacheDuration);
}
else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.CompiledResource)
{
imageLoader = ImageService.Instance.LoadCompiledResource(ffSource.Path);
}
else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.ApplicationBundle)
{
imageLoader = ImageService.Instance.LoadFileFromApplicationBundle(ffSource.Path);
}
else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.Filepath)
{
imageLoader = ImageService.Instance.LoadFile(ffSource.Path);
}
else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.Stream)
{
imageLoader = ImageService.Instance.LoadStream(ffSource.Stream);
}
else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.EmbeddedResource)
{
imageLoader = ImageService.Instance.LoadEmbeddedResource(ffSource.Path);
}
if (imageLoader != null)
{
// LoadingPlaceholder
if (placeholderSource != null)
{
if (placeholderSource != null)
{
imageLoader.LoadingPlaceholder(placeholderSource.Path, placeholderSource.ImageSource);
}
}
// ErrorPlaceholder
if (!string.IsNullOrWhiteSpace(ErrorPlaceholderImagePath))
{
var errorPlaceholderSource = GetImageSourceBinding(ErrorPlaceholderImagePath, null);
if (errorPlaceholderSource != null)
{
imageLoader.ErrorPlaceholder(errorPlaceholderSource.Path, errorPlaceholderSource.ImageSource);
}
}
if (CustomDataResolver != null)
{
imageLoader.WithCustomDataResolver(CustomDataResolver);
imageLoader.WithCustomLoadingPlaceholderDataResolver(CustomLoadingPlaceholderDataResolver);
imageLoader.WithCustomErrorPlaceholderDataResolver(CustomErrorPlaceholderDataResolver);
}
// Downsample
if ((int)DownsampleHeight != 0 || (int)DownsampleWidth != 0)
{
if (DownsampleUseDipUnits)
{
imageLoader.DownSampleInDip((int)DownsampleWidth, (int)DownsampleHeight);
}
else
{
imageLoader.DownSample((int)DownsampleWidth, (int)DownsampleHeight);
}
}
// RetryCount
if (RetryCount > 0)
{
imageLoader.Retry(RetryCount, RetryDelay);
}
if (BitmapOptimizations.HasValue)
{
imageLoader.BitmapOptimizations(BitmapOptimizations.Value);
}
// FadeAnimation
if (FadeAnimationEnabled.HasValue)
{
imageLoader.FadeAnimation(FadeAnimationEnabled.Value, duration: FadeAnimationDuration);
}
// FadeAnimationForCachedImages
if (FadeAnimationEnabled.HasValue && FadeAnimationForCachedImages.HasValue)
{
imageLoader.FadeAnimation(FadeAnimationEnabled.Value, FadeAnimationForCachedImages.Value, FadeAnimationDuration);
}
// TransformPlaceholders
if (TransformPlaceholders.HasValue)
{
imageLoader.TransformPlaceholders(TransformPlaceholders.Value);
}
// Transformations
if (Transformations != null && Transformations.Count > 0)
{
imageLoader.Transform(Transformations);
}
if (InvalidateLayoutAfterLoaded.HasValue)
{
imageLoader.InvalidateLayout(InvalidateLayoutAfterLoaded.Value);
}
imageLoader.WithPriority(LoadingPriority);
if (CacheType.HasValue)
{
imageLoader.WithCache(CacheType.Value);
}
if (LoadingDelay > 0)
{
imageLoader.Delay(LoadingDelay);
}
imageLoader.Finish((work) =>
{
IsLoading = false;
OnFinish?.Invoke(this, new Args.FinishEventArgs(work));
});
imageLoader.Success((imageInformation, loadingResult) =>
{
OnSuccess?.Invoke(this, new Args.SuccessEventArgs(imageInformation, loadingResult));
_lastImageSource = ffSource;
});
if (OnError != null)
{
imageLoader.Error((ex) => OnError?.Invoke(this, new Args.ErrorEventArgs(ex)));
}
if (OnDownloadStarted != null)
{
imageLoader.DownloadStarted((downloadInformation) => OnDownloadStarted(this, new Args.DownloadStartedEventArgs(downloadInformation)));
}
if (OnDownloadProgress != null)
{
imageLoader.DownloadProgress((progress) => OnDownloadProgress(this, new Args.DownloadProgressEventArgs(progress)));
}
if (OnFileWriteFinished != null)
{
imageLoader.FileWriteFinished((info) => OnFileWriteFinished(this, new Args.FileWriteFinishedEventArgs(info)));
}
if (!string.IsNullOrWhiteSpace(CustomCacheKey))
{
imageLoader.CacheKey(CustomCacheKey);
}
SetupOnBeforeImageLoading(imageLoader);
_scheduledWork = imageLoader.Into(_internalImage);
}
}
private void SetImage(CachedImage oldElement = null)
{
Xamarin.Forms.ImageSource source = Element.Source;
var ffSource = ImageSourceBinding.GetImageSourceBinding(source, Element);
var placeholderSource = ImageSourceBinding.GetImageSourceBinding(Element.LoadingPlaceholder, Element);
if (oldElement != null && _lastImageSource != null && ffSource != null && !ffSource.Equals(_lastImageSource) &&
(string.IsNullOrWhiteSpace(placeholderSource?.Path) || placeholderSource?.Stream != null))
{
_lastImageSource = null;
Control.Image = null;
}
Element.SetIsLoading(true);
Cancel();
TaskParameter imageLoader = null;
if (ffSource == null)
{
if (Control != null)
{
Control.Image = null;
}
ImageLoadingFinished(Element);
}
else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.Url)
{
imageLoader = ImageService.Instance.LoadUrl(ffSource.Path, Element.CacheDuration);
}
else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.CompiledResource)
{
imageLoader = ImageService.Instance.LoadCompiledResource(ffSource.Path);
}
else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.ApplicationBundle)
{
imageLoader = ImageService.Instance.LoadFileFromApplicationBundle(ffSource.Path);
}
else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.Filepath)
{
imageLoader = ImageService.Instance.LoadFile(ffSource.Path);
}
else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.Stream)
{
imageLoader = ImageService.Instance.LoadStream(ffSource.Stream);
}
if (imageLoader != null)
{
// CustomKeyFactory
if (Element.CacheKeyFactory != null)
{
var bindingContext = Element.BindingContext;
imageLoader.CacheKey(Element.CacheKeyFactory.GetKey(source, bindingContext));
}
// LoadingPlaceholder
if (Element.LoadingPlaceholder != null)
{
if (placeholderSource != null)
{
imageLoader.LoadingPlaceholder(placeholderSource.Path, placeholderSource.ImageSource);
}
}
// ErrorPlaceholder
if (Element.ErrorPlaceholder != null)
{
var errorPlaceholderSource = ImageSourceBinding.GetImageSourceBinding(Element.ErrorPlaceholder, Element);
if (errorPlaceholderSource != null)
{
imageLoader.ErrorPlaceholder(errorPlaceholderSource.Path, errorPlaceholderSource.ImageSource);
}
}
// Enable vector image source
var vect1 = Element.Source as IVectorImageSource;
var vect2 = Element.LoadingPlaceholder as IVectorImageSource;
var vect3 = Element.ErrorPlaceholder as IVectorImageSource;
if (vect1 != null)
{
imageLoader.WithCustomDataResolver(vect1.GetVectorDataResolver());
}
if (vect2 != null)
{
imageLoader.WithCustomLoadingPlaceholderDataResolver(vect2.GetVectorDataResolver());
}
if (vect3 != null)
{
imageLoader.WithCustomErrorPlaceholderDataResolver(vect3.GetVectorDataResolver());
}
if (Element.CustomDataResolver != null)
{
imageLoader.WithCustomDataResolver(Element.CustomDataResolver);
imageLoader.WithCustomLoadingPlaceholderDataResolver(Element.CustomDataResolver);
imageLoader.WithCustomErrorPlaceholderDataResolver(Element.CustomDataResolver);
}
// Downsample
if (Element.DownsampleToViewSize && (Element.Width > 0 || Element.Height > 0))
{
if (Element.Height > Element.Width)
{
imageLoader.DownSampleInDip(height: (int)Element.Height);
}
else
{
imageLoader.DownSampleInDip(width: (int)Element.Width);
}
}
else if (Element.DownsampleToViewSize && (Element.WidthRequest > 0 || Element.HeightRequest > 0))
{
if (Element.HeightRequest > Element.WidthRequest)
{
imageLoader.DownSampleInDip(height: (int)Element.HeightRequest);
}
else
{
imageLoader.DownSampleInDip(width: (int)Element.WidthRequest);
}
}
else if ((int)Element.DownsampleHeight != 0 || (int)Element.DownsampleWidth != 0)
{
if (Element.DownsampleHeight > Element.DownsampleWidth)
{
if (Element.DownsampleUseDipUnits)
{
imageLoader.DownSampleInDip(height: (int)Element.DownsampleHeight);
}
else
{
imageLoader.DownSample(height: (int)Element.DownsampleHeight);
}
}
else
{
if (Element.DownsampleUseDipUnits)
{
imageLoader.DownSampleInDip(width: (int)Element.DownsampleWidth);
}
else
{
imageLoader.DownSample(width: (int)Element.DownsampleWidth);
}
}
}
// RetryCount
if (Element.RetryCount > 0)
{
imageLoader.Retry(Element.RetryCount, Element.RetryDelay);
}
if (Element.BitmapOptimizations.HasValue)
{
imageLoader.BitmapOptimizations(Element.BitmapOptimizations.Value);
}
// FadeAnimation
if (Element.FadeAnimationEnabled.HasValue)
{
imageLoader.FadeAnimation(Element.FadeAnimationEnabled.Value);
}
// TransformPlaceholders
if (Element.TransformPlaceholders.HasValue)
{
imageLoader.TransformPlaceholders(Element.TransformPlaceholders.Value);
}
// Transformations
if (Element.Transformations != null && Element.Transformations.Count > 0)
{
imageLoader.Transform(Element.Transformations);
}
imageLoader.WithPriority(Element.LoadingPriority);
if (Element.CacheType.HasValue)
{
imageLoader.WithCache(Element.CacheType.Value);
}
if (Element.LoadingDelay.HasValue)
{
imageLoader.Delay(Element.LoadingDelay.Value);
}
var element = Element;
imageLoader.Finish((work) => {
element.OnFinish(new CachedImageEvents.FinishEventArgs(work));
ImageLoadingFinished(element);
});
imageLoader.Success((imageInformation, loadingResult) =>
{
element.OnSuccess(new CachedImageEvents.SuccessEventArgs(imageInformation, loadingResult));
_lastImageSource = ffSource;
});
imageLoader.Error((exception) =>
element.OnError(new CachedImageEvents.ErrorEventArgs(exception)));
imageLoader.DownloadStarted((downloadInformation) =>
element.OnDownloadStarted(new CachedImageEvents.DownloadStartedEventArgs(downloadInformation)));
imageLoader.DownloadProgress((progress) =>
element.OnDownloadProgress(new CachedImageEvents.DownloadProgressEventArgs(progress)));
imageLoader.FileWriteFinished((fileWriteInfo) =>
element.OnFileWriteFinished(new CachedImageEvents.FileWriteFinishedEventArgs(fileWriteInfo)));
_currentTask = imageLoader.Into(Control);
}
}
private void UpdateBitmap(CachedImage previous = null)
{
Xamarin.Forms.ImageSource source = null;
var vectorSource = Element.Source as IVectorImageSource;
if (vectorSource != null)
{
source = vectorSource.ImageSource;
}
else
{
source = Element.Source;
}
var imageView = Control;
var ffSource = ImageSourceBinding.GetImageSourceBinding(source);
var placeholderSource = ImageSourceBinding.GetImageSourceBinding(Element.LoadingPlaceholder);
if (previous != null && _lastImageSource != null && ffSource != null && !ffSource.Equals(_lastImageSource) &&
(string.IsNullOrWhiteSpace(placeholderSource?.Path) || placeholderSource?.Stream != null))
{
_lastImageSource = null;
if (imageView != null)
{
imageView.SkipInvalidate();
}
Control.SetImageResource(global::Android.Resource.Color.Transparent);
}
((IElementController)Element).SetValueFromRenderer(CachedImage.IsLoadingPropertyKey, true);
if (Element != null && object.Equals(Element.Source, source) && !_isDisposed)
{
Cancel();
TaskParameter imageLoader = null;
if (ffSource == null)
{
if (imageView != null)
{
imageView.SetImageResource(global::Android.Resource.Color.Transparent);
}
ImageLoadingFinished(Element);
}
else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.Url)
{
imageLoader = ImageService.Instance.LoadUrl(ffSource.Path, Element.CacheDuration);
}
else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.CompiledResource)
{
imageLoader = ImageService.Instance.LoadCompiledResource(ffSource.Path);
}
else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.ApplicationBundle)
{
imageLoader = ImageService.Instance.LoadFileFromApplicationBundle(ffSource.Path);
}
else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.Filepath)
{
imageLoader = ImageService.Instance.LoadFile(ffSource.Path);
}
else if (ffSource.ImageSource == FFImageLoading.Work.ImageSource.Stream)
{
imageLoader = ImageService.Instance.LoadStream(ffSource.Stream);
}
if (imageLoader != null)
{
// CustomKeyFactory
if (Element.CacheKeyFactory != null)
{
var bindingContext = Element.BindingContext;
imageLoader.CacheKey(Element.CacheKeyFactory.GetKey(source, bindingContext));
}
// CustomDataResolver
if (Element.CustomDataResolver != null)
{
imageLoader.WithCustomDataResolver(Element.CustomDataResolver);
}
else if (vectorSource != null)
{
if (vectorSource.VectorHeight == 0 && vectorSource.VectorWidth == 0)
{
if (Element.Height > 0d)
{
vectorSource.UseDipUnits = true;
vectorSource.VectorHeight = (int)Element.Height;
}
else if (Element.Width > 0d)
{
vectorSource.UseDipUnits = true;
vectorSource.VectorWidth = (int)Element.Width;
}
else
{
vectorSource.UseDipUnits = false;
vectorSource.VectorHeight = 200;
}
}
imageLoader.WithCustomDataResolver(vectorSource.GetVectorDataResolver());
}
// LoadingPlaceholder
if (Element.LoadingPlaceholder != null)
{
if (placeholderSource != null)
{
imageLoader.LoadingPlaceholder(placeholderSource.Path, placeholderSource.ImageSource);
}
}
// ErrorPlaceholder
if (Element.ErrorPlaceholder != null)
{
var errorPlaceholderSource = ImageSourceBinding.GetImageSourceBinding(Element.ErrorPlaceholder);
if (errorPlaceholderSource != null)
{
imageLoader.ErrorPlaceholder(errorPlaceholderSource.Path, errorPlaceholderSource.ImageSource);
}
}
// Downsample
if (Element.DownsampleToViewSize && (Element.Width > 0 || Element.Height > 0))
{
if (Element.Height > Element.Width)
{
imageLoader.DownSample(height: Element.Height.DpToPixels());
}
else
{
imageLoader.DownSample(width: Element.Width.DpToPixels());
}
}
else if (Element.DownsampleToViewSize && (Element.WidthRequest > 0 || Element.HeightRequest > 0))
{
if (Element.HeightRequest > Element.WidthRequest)
{
imageLoader.DownSample(height: Element.HeightRequest.DpToPixels());
}
else
{
imageLoader.DownSample(width: Element.WidthRequest.DpToPixels());
}
}
else if ((int)Element.DownsampleHeight != 0 || (int)Element.DownsampleWidth != 0)
{
if (Element.DownsampleHeight > Element.DownsampleWidth)
{
imageLoader.DownSample(height: Element.DownsampleUseDipUnits
? Element.DownsampleHeight.DpToPixels() : (int)Element.DownsampleHeight);
}
else
{
imageLoader.DownSample(width: Element.DownsampleUseDipUnits
? Element.DownsampleWidth.DpToPixels() : (int)Element.DownsampleWidth);
}
}
// RetryCount
if (Element.RetryCount > 0)
{
imageLoader.Retry(Element.RetryCount, Element.RetryDelay);
}
// TransparencyChannel
if (Element.TransparencyEnabled.HasValue)
{
imageLoader.TransparencyChannel(Element.TransparencyEnabled.Value);
}
if (Element.BitmapOptimizations.HasValue)
{
imageLoader.BitmapOptimizations(Element.BitmapOptimizations.Value);
}
// FadeAnimation
if (Element.FadeAnimationEnabled.HasValue)
{
imageLoader.FadeAnimation(Element.FadeAnimationEnabled.Value);
}
// TransformPlaceholders
if (Element.TransformPlaceholders.HasValue)
{
imageLoader.TransformPlaceholders(Element.TransformPlaceholders.Value);
}
// Transformations
if (Element.Transformations != null && Element.Transformations.Count > 0)
{
imageLoader.Transform(Element.Transformations);
}
imageLoader.WithPriority(Element.LoadingPriority);
if (Element.CacheType.HasValue)
{
imageLoader.WithCache(Element.CacheType.Value);
}
if (Element.LoadingDelay.HasValue)
{
imageLoader.Delay(Element.LoadingDelay.Value);
}
var element = Element;
imageLoader.Finish((work) =>
{
element.OnFinish(new CachedImageEvents.FinishEventArgs(work));
ImageLoadingFinished(element);
});
imageLoader.Success((imageInformation, loadingResult) =>
{
element.OnSuccess(new CachedImageEvents.SuccessEventArgs(imageInformation, loadingResult));
_lastImageSource = ffSource;
});
imageLoader.Error((exception) =>
element.OnError(new CachedImageEvents.ErrorEventArgs(exception)));
imageLoader.DownloadStarted((downloadInformation) =>
element.OnDownloadStarted(new CachedImageEvents.DownloadStartedEventArgs(downloadInformation)));
_currentTask = imageLoader.Into(imageView);
}
}
}
