public void PasteImage(NSObject sender)
{
// Initialize the pasteboard
NSPasteboard pasteboard = NSPasteboard.GeneralPasteboard;
Class [] classArray = { new Class("NSImage") };
bool ok = pasteboard.CanReadObjectForClasses(classArray, null);
if (ok)
{
// Read the image off of the pasteboard
NSObject [] objectsToPaste = pasteboard.ReadObjectsForClasses(classArray, null);
NSImage image = (NSImage)objectsToPaste[0];
// Display the new image
ImageView.Image = image;
}
Class [] classArray2 = { new Class("ImageInfo") };
ok = pasteboard.CanReadObjectForClasses(classArray2, null);
if (ok)
{
// Read the image off of the pasteboard
NSObject[] objectsToPaste = pasteboard.ReadObjectsForClasses(classArray2, null);
if (objectsToPaste.Length > 0)
{
ImageInfo info = (ImageInfo)objectsToPaste[0];
}
}
}
public void PasteImage(NSObject sender)
{
// Initialize the pasteboard
NSPasteboard pasteboard = NSPasteboard.GeneralPasteboard;
Class [] classArray = { new Class("NSImage") };
// NOTE: Sending messages directly to the base Objective-C API because of this defect:
// https://bugzilla.xamarin.com/show_bug.cgi?id=31760
// Check to see if an image is on the pasteboard
bool ok = pasteboard.CanReadObjectForClasses(classArray, null);
if (ok)
{
// Read the image off of the pasteboard
NSObject [] objectsToPaste = pasteboard.ReadObjectsForClasses(classArray, null);
NSImage image = (NSImage)objectsToPaste[0];
// Display the new image
ImageView.Image = image;
}
Class [] classArray2 = { new Class("ImageInfo") };
ok = pasteboard.CanReadObjectForClasses(classArray2, null);
if (ok)
{
// Read the image off of the pasteboard
NSObject [] objectsToPaste = pasteboard.ReadObjectsForClasses(classArray2, null);
ImageInfo info = (ImageInfo)objectsToPaste[0];
}
}
private bool HasUrlOnPasteboard()
{
NSPasteboard pasteboard = NSPasteboard.GeneralPasteboard;
var classArray = new[] { new Class(typeof(NSUrl)) };
return(pasteboard.CanReadObjectForClasses(classArray, null));
}
private IntPtr getFromPasteboard(IntPtr @class)
{
NSArray classArray = NSArray.ArrayWithObject(@class);
if (!generalPasteboard.CanReadObjectForClasses(classArray, null))
{
return(IntPtr.Zero);
}
var result = generalPasteboard.ReadObjectsForClasses(classArray, null);
var objects = result?.ToArray();
return(objects?.Length > 0 ? objects[0] : IntPtr.Zero);
}
public override string GetText()
{
NSArray classArray = NSArray.ArrayWithObject(Class.Get("NSString"));
if (GeneralPasteboard.CanReadObjectForClasses(classArray, null))
{
var result = GeneralPasteboard.ReadObjectsForClasses(classArray, null);
var objects = result?.ToArray() ?? new IntPtr[0];
if (objects.Length > 0 && objects[0] != IntPtr.Zero)
{
return(Cocoa.FromNSString(objects[0]));
}
}
return(string.Empty);
}
public void Paste(NSObject sender)
{
NSPasteboard pasteboard = NSPasteboard.GeneralPasteboard;
var classArray = new[] { new Class(typeof(NSUrl)) };
bool validContent = pasteboard.CanReadObjectForClasses(classArray, null);
if (validContent)
{
NSObject[] copiedItems = pasteboard.ReadObjectsForClasses(classArray, null);
NSUrl url = (NSUrl)copiedItems[0];
if (LottieFilesUrl.IsValidUrl(url))
{
LottieFilesUrl lottieUrl = new LottieFilesUrl(url);
this.View.Window.Title = lottieUrl.AnimationName;
this.lottieView.OpenAnimationUrl(lottieUrl.JsonUrl);
}
}
}
private static DataPackageView GetFromNative(NSPasteboard pasteboard)
{
if (pasteboard is null)
{
throw new ArgumentException(nameof(pasteboard));
}
var dataPackage = new DataPackage();
// Extract all the standard data format information from the pasteboard items.
// Each format can only be used once; therefore, generally the last occurrence of the format will be the one used.
foreach (NSPasteboardItem item in pasteboard.PasteboardItems)
{
if (item.Types.Contains(NSPasteboard.NSPasteboardTypeTIFF) ||
item.Types.Contains(NSPasteboard.NSPasteboardTypePNG))
{
// Images may be very large, we never want to load them until they are needed.
// Therefore, create a data provider used to asynchronously fetch the image.
dataPackage.SetDataProvider(
StandardDataFormats.Bitmap,
async cancellationToken =>
{
NSImage?image = null;
/* Some apps, including Photos, don't appear to put image data in the pasteboard.
* Instead, the image URL is provided although the type indicates it is an image.
*
* To get around this an image is read as follows:
* (1) If the pasteboard contains an image type then:
* (2) Attempt to read the image as an object (NSImage).
* This may fail as some tested apps provide a URL although declare an image (Photos).
* With other apps (such as web browsers) an image will be read correctly here.
* (3) If reading as an NSImage object fails, attempt to read the image from a file URL (local images)
* (4) If reading from a file URL fails, attempt to read the image from a URL (remote images)
*
* Reading as an NSImage object follows the docs here:
* https://docs.microsoft.com/en-us/xamarin/mac/app-fundamentals/copy-paste#add-an-nsdocument
*/
var classArray = new Class[] { new Class("NSImage") };
if (pasteboard.CanReadObjectForClasses(classArray, null))
{
NSObject[] objects = pasteboard.ReadObjectsForClasses(classArray, null);
if (objects.Length > 0)
{
// Only use the first image found
image = objects[0] as NSImage;
}
}
// In order to get here the pasteboard must have declared it had image types.
// However, if image is null, no objects were found and the image is likely a URL instead.
if (image == null &&
item.Types.Contains(NSPasteboard.NSPasteboardTypeFileUrl))
{
var url = item.GetStringForType(NSPasteboard.NSPasteboardTypeFileUrl);
image = new NSImage(new NSUrl(url));
}
if (image == null &&
item.Types.Contains(NSPasteboard.NSPasteboardTypeUrl))
{
var url = item.GetStringForType(NSPasteboard.NSPasteboardTypeUrl);
image = new NSImage(new NSUrl(url));
}
if (image != null)
{
// Thanks to: https://stackoverflow.com/questions/13305028/monomac-best-way-to-convert-bitmap-to-nsimage/13355747
using (var imageData = image.AsTiff())
{
var imgRep = NSBitmapImageRep.ImageRepFromData(imageData !) as NSBitmapImageRep;
var data = imgRep !.RepresentationUsingTypeProperties(NSBitmapImageFileType.Png, null);
return(new RandomAccessStreamReference(async ct =>
{
return data.AsStream().AsRandomAccessStream().TrySetContentType("image/png");
}));
}
}
else
{
// Return an empty image
return(new RandomAccessStreamReference(async ct =>
{
var stream = new MemoryStream();
stream.Position = 0;
return stream.AsRandomAccessStream().TrySetContentType("image/png");
}));
}
});
}
if (item.Types.Contains(NSPasteboard.NSPasteboardTypeHTML))
{
var html = item.GetStringForType(NSPasteboard.NSPasteboardTypeHTML);
if (html != null)
{
dataPackage.SetHtmlFormat(html);
}
}
if (item.Types.Contains(NSPasteboard.NSPasteboardTypeRTF))
{
var rtf = item.GetStringForType(NSPasteboard.NSPasteboardTypeRTF);
if (rtf != null)
{
dataPackage.SetRtf(rtf);
}
}
if (item.Types.Contains(NSPasteboard.NSPasteboardTypeFileUrl))
{
// Drag and drop will use temporary URLs similar to: file:///.file/id=1234567.1234567
var tempFileUrl = item.GetStringForType(NSPasteboard.NSPasteboardTypeFileUrl);
// Files may be very large, we never want to load them until they are needed.
// Therefore, create a data provider used to asynchronously fetch the file.
dataPackage.SetDataProvider(
StandardDataFormats.StorageItems,
async cancellationToken =>
{
// Convert from a temp Url (see above example) into an absolute file path
var fileUrl = new NSUrl(tempFileUrl);
var file = await StorageFile.GetFileFromPathAsync(fileUrl.FilePathUrl.AbsoluteString);
var storageItems = new List <IStorageItem>();
storageItems.Add(file);
return(storageItems.AsReadOnly());
});
}
if (item.Types.Contains(NSPasteboard.NSPasteboardTypeString))
{
var text = item.GetStringForType(NSPasteboard.NSPasteboardTypeString);
if (text != null)
{
dataPackage.SetText(text);
}
}
if (item.Types.Contains(NSPasteboard.NSPasteboardTypeUrl))
{
var url = item.GetStringForType(NSPasteboard.NSPasteboardTypeUrl);
if (url != null)
{
DataPackage.SeparateUri(
url,
out string?webLink,
out string?applicationLink);
if (webLink != null)
{
dataPackage.SetWebLink(new Uri(webLink));
}
if (applicationLink != null)
{
dataPackage.SetApplicationLink(new Uri(applicationLink));
}
// Deprecated but still added for compatibility
dataPackage.SetUri(new Uri(url));
}
}
}
return(dataPackage.GetView());
}
