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feat(PdfDocument): Inport initial implementation from PR unoplatform#…
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,81 @@ | ||
| #if __ANDROID__ | ||
| using System; | ||
| using System.Threading.Tasks; | ||
| using Android.Graphics.Pdf; | ||
| using Uno; | ||
|
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||
| namespace Windows.Data.Pdf | ||
| { | ||
| public partial class PdfDocument : IDisposable | ||
| { | ||
| private readonly PdfRenderer pdfRenderer; | ||
|
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| private PdfDocument(PdfRenderer pdfRenderer) | ||
| { | ||
| this.pdfRenderer = pdfRenderer ?? throw new ArgumentNullException(nameof(pdfRenderer)); | ||
| } | ||
|
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| [NotImplemented] | ||
| public bool IsPasswordProtected => false; | ||
|
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| public uint PageCount => (uint)pdfRenderer.PageCount; | ||
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| public PdfPage GetPage(uint pageIndex) | ||
| { | ||
| if (pageIndex >= pdfRenderer.PageCount) | ||
| { | ||
| throw new ArgumentOutOfRangeException(nameof(pageIndex), $"In this document the page index cannot be {pageIndex}. Page count is {pdfRenderer.PageCount}"); | ||
| } | ||
|
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| var pdfPage = pdfRenderer.OpenPage((int)pageIndex); | ||
| return new PdfPage(pdfPage); | ||
| } | ||
|
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| public static Foundation.IAsyncOperation<PdfDocument> LoadFromFileAsync(Storage.IStorageFile file) | ||
| { | ||
| if (file is null) | ||
| { | ||
| throw new ArgumentNullException(nameof(file)); | ||
| } | ||
|
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| #pragma warning disable Uno0001 // Uno type or member is not implemented | ||
| var localpath = file.Path; | ||
| #pragma warning restore Uno0001 // Uno type or member is not implemented | ||
| var javaFile = new Java.IO.File(localpath); | ||
| var fileDescriptor = Android.OS.ParcelFileDescriptor.Open(javaFile, Android.OS.ParcelFileMode.ReadOnly); | ||
| var pdfRenderer = new PdfRenderer(fileDescriptor); | ||
| var pdfDocument = new PdfDocument(pdfRenderer); | ||
|
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| return Task.FromResult(pdfDocument).AsAsyncOperation(); | ||
| } | ||
|
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| [NotImplemented] | ||
| public static Foundation.IAsyncOperation<PdfDocument> LoadFromFileAsync(Storage.IStorageFile file, string password) | ||
| { | ||
| // password protected PDF files are not supported by PdfRenderer in Android | ||
| throw new NotImplementedException("The member IAsyncOperation<PdfDocument> PdfDocument.LoadFromFileAsync(IStorageFile file, string password) is not implemented in Uno."); | ||
| } | ||
|
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| [NotImplemented] | ||
| public static Foundation.IAsyncOperation<PdfDocument> LoadFromStreamAsync(Storage.Streams.IRandomAccessStream inputStream) | ||
| { | ||
| throw new NotImplementedException("The member IAsyncOperation<PdfDocument> PdfDocument.LoadFromStreamAsync(IRandomAccessStream inputStream) is not implemented in Uno."); | ||
| } | ||
|
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|
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| [NotImplemented] | ||
| public static Foundation.IAsyncOperation<PdfDocument> LoadFromStreamAsync(Storage.Streams.IRandomAccessStream inputStream, string password) | ||
| { | ||
| // password protected PDF files are not supported by PdfRenderer in Android | ||
| throw new NotImplementedException("The member IAsyncOperation<PdfDocument> PdfDocument.LoadFromStreamAsync(IRandomAccessStream inputStream, string password) is not implemented in Uno."); | ||
| } | ||
|
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| public void Dispose() | ||
| { | ||
| pdfRenderer.Dispose(); | ||
| } | ||
| } | ||
| } | ||
|
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| #endif |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,173 @@ | ||
| #if __ANDROID__ | ||
| using System; | ||
| using System.IO; | ||
| using System.Threading.Tasks; | ||
| using Android.Graphics; | ||
| using Android.Graphics.Pdf; | ||
| using Uno; | ||
| using Windows.Foundation; | ||
| using Windows.Storage.Streams; | ||
| using Windows.UI; | ||
| using Color = Windows.UI.Color; | ||
| using Rect = Windows.Foundation.Rect; | ||
|
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||
| namespace Windows.Data.Pdf | ||
| { | ||
| public partial class PdfPage : IDisposable | ||
| { | ||
| private readonly PdfRenderer.Page pdfPage; | ||
|
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| internal PdfPage(PdfRenderer.Page pdfPage) | ||
| { | ||
| this.pdfPage = pdfPage ?? throw new ArgumentNullException(nameof(pdfPage)); | ||
| } | ||
|
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| public PdfPageDimensions Dimensions { get; } = new PdfPageDimensions(); | ||
|
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| public uint Index => (uint)pdfPage.Index; | ||
|
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| [NotImplemented] | ||
| public float PreferredZoom | ||
| { | ||
| get | ||
| { | ||
| throw new NotImplementedException("The member float PdfPage.PreferredZoom is not implemented in Uno."); | ||
| } | ||
| } | ||
|
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||
| [NotImplemented] | ||
| public PdfPageRotation Rotation | ||
| { | ||
| get | ||
| { | ||
| throw new NotImplementedException("The member PdfPageRotation PdfPage.Rotation is not implemented in Uno."); | ||
| } | ||
| } | ||
|
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| public Size Size => new Size(pdfPage.Width, pdfPage.Height); | ||
|
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| public IAsyncAction RenderToStreamAsync(IRandomAccessStream outputStream) | ||
| { | ||
| if (outputStream is null) | ||
| { | ||
| throw new ArgumentNullException(nameof(outputStream)); | ||
| } | ||
|
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| var options = new PdfPageRenderOptions | ||
| { | ||
| DestinationWidth = (uint)pdfPage.Width, | ||
| DestinationHeight = (uint)pdfPage.Height | ||
| }; | ||
| return RenderToStreamAsync(outputStream, options); | ||
| } | ||
|
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| public IAsyncAction RenderToStreamAsync(IRandomAccessStream outputStream, PdfPageRenderOptions options) | ||
| { | ||
| #region Validate arguments | ||
| if (outputStream is null) | ||
| { | ||
| throw new ArgumentNullException(nameof(outputStream)); | ||
| } | ||
| if (options is null) | ||
| { | ||
| throw new ArgumentNullException(nameof(options)); | ||
| } | ||
| if (options.DestinationWidth > int.MaxValue) | ||
| { | ||
| throw new ArgumentOutOfRangeException(nameof(options), $"PdfPageRenderOptions.DestinationWidth = {options.DestinationWidth}. Must be less than or equal to int.MaxValue"); | ||
| } | ||
| if (options.DestinationHeight > int.MaxValue) | ||
| { | ||
| throw new ArgumentOutOfRangeException(nameof(options), $"PdfPageRenderOptions.DestinationHeight = {options.DestinationHeight}. Must be less than or equal to int.MaxValue"); | ||
| } | ||
| #endregion | ||
|
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| return Task.Run(() => | ||
| { | ||
| const int quality = 100; | ||
| var bitmap = RenderInternal(options); | ||
| bitmap.Compress(Bitmap.CompressFormat.Png, quality, outputStream.AsStream()); | ||
| return bitmap; | ||
| }).AsAsyncAction(); | ||
| } | ||
|
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| private Bitmap RenderInternal(PdfPageRenderOptions options) | ||
| { | ||
| var destination = new Size(options.DestinationWidth, options.DestinationHeight); | ||
|
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| #region handle 0-width and 0-height | ||
| if (destination.Width == 0 && destination.Height == 0) | ||
| { | ||
| // destination size not set - render with the page original size | ||
| destination = Size; | ||
| } | ||
| else if (destination.Width == 0) | ||
| { | ||
| // destination width not set - calculate it based on height proportion | ||
| var scale = destination.Height / Size.Height; | ||
| destination = new Size(Size.Width * scale, destination.Height); | ||
| } | ||
| else if (destination.Height == 0) | ||
| { | ||
| // destination height not set - calculate it based on width proportion | ||
| var scale = destination.Width / Size.Width; | ||
| destination = new Size(destination.Width, Size.Height * scale); | ||
| } | ||
| #endregion | ||
|
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| #region scale according to DPI | ||
| var dpi = Graphics.Display.DisplayInformation.GetForCurrentView().LogicalDpi / 96.0f; | ||
| destination = new Size(destination.Width * dpi, destination.Height * dpi); | ||
| #endregion | ||
|
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| #region create bitmap | ||
| var bitmap = Bitmap.CreateBitmap((int)destination.Width, (int)destination.Height, Bitmap.Config.Argb8888); | ||
| var destinationRect = new Rect(new Foundation.Point(), destination); | ||
| #endregion | ||
|
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| #region fill with background color | ||
| using (var canvas = new Canvas(bitmap)) | ||
| { | ||
| var color = options.BackgroundColor.Equals(default(Color)) ? Colors.White : options.BackgroundColor; | ||
| canvas.DrawRect(destinationRect, new Paint() | ||
| { | ||
| Color = color | ||
| }); | ||
| } | ||
| #endregion | ||
|
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| #region render only a portion of the page, defined by PdfPageRenderOptions.SourceRect, if set | ||
| var sourceRect = options.SourceRect; | ||
| Matrix matrix = null; | ||
| if (sourceRect.Width > 0 && sourceRect.Height > 0) | ||
| { | ||
| matrix = new Matrix(); | ||
| matrix.SetRectToRect(AsAndroidRectF(sourceRect), AsAndroidRectF(destinationRect), Matrix.ScaleToFit.Start); | ||
| } | ||
| #endregion | ||
|
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| // Render content | ||
| pdfPage.Render(bitmap, null, matrix, PdfRenderMode.ForDisplay); | ||
| return bitmap; | ||
| } | ||
|
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| public IAsyncAction PreparePageAsync() | ||
| { | ||
| return Task.CompletedTask.AsAsyncAction(); | ||
| } | ||
|
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| public void Dispose() | ||
| { | ||
| pdfPage.Close(); | ||
| pdfPage.Dispose(); | ||
| } | ||
|
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| private static RectF AsAndroidRectF(Rect rect) => new RectF( | ||
| (float)rect.Left, | ||
| (float)rect.Top, | ||
| (float)rect.Right, | ||
| (float)rect.Bottom); | ||
| } | ||
| } | ||
|
|
||
| #endif |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,15 @@ | ||
| #if __ANDROID__ | ||
| using Windows.Foundation; | ||
|
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| namespace Windows.Data.Pdf | ||
| { | ||
| public partial class PdfPageDimensions | ||
| { | ||
| public Rect ArtBox { get; } | ||
| public Rect BleedBox { get; } | ||
| public Rect CropBox { get; } | ||
| public Rect MediaBox { get; } | ||
| public Rect TrimBox { get; } | ||
| } | ||
| } | ||
| #endif |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,23 @@ | ||
| #if __ANDROID__ | ||
| using System; | ||
| using Windows.Foundation; | ||
| using Windows.UI; | ||
|
|
||
| namespace Windows.Data.Pdf | ||
| { | ||
| public partial class PdfPageRenderOptions | ||
| { | ||
| public Rect SourceRect { get; set; } | ||
|
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| public bool IsIgnoringHighContrast { get; set; } | ||
|
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| public uint DestinationWidth { get; set; } | ||
|
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| public uint DestinationHeight { get; set; } | ||
|
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| public Guid BitmapEncoderId { get; set; } | ||
|
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| public Color BackgroundColor { get; set; } | ||
| } | ||
| } | ||
| #endif |
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