/*

 Copyright (C) 2017 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 Custom NSImageView for intercepting delete/cut/paste operations.

 */

#import "ImageView.h"

@implementation ImageView

- (void)copy:(id)sender

{

    if ([self allowsCutCopyPaste])

    {

        NSImage *anImage = [self image];

        if (anImage != nil)

        {

            // copy to pasteboard

            NSPasteboard *pboard = [NSPasteboard generalPasteboard];

            [pboard declareTypes: [NSArray arrayWithObject:NSTIFFPboardType] owner:self];

            [pboard setData: [anImage TIFFRepresentation] forType: NSTIFFPboardType];

        }

    }

}

- (void)paste:(id)sender {

    NSPasteboard *pasteboard = [NSPasteboard generalPasteboard];

    NSArray *classArray = [NSArray arrayWithObject:[NSImage class]];

    NSDictionary *options = [NSDictionary dictionary];

    if ([pasteboard canReadObjectForClasses:classArray options:options])

    {

        NSArray *objectsToPaste = [pasteboard readObjectsForClasses:classArray options:options];

        NSImage *image = [objectsToPaste objectAtIndex:0];

        [self setImage:image];

    }

    // Notify our delegate of the image change.

    [self.delegate imageView:self didChangeImage:self.image];

}

- (void)delete:(id)sender

{

    if ([self allowsCutCopyPaste])

    {

        [self setImage: nil];

    }

    // Notify our delegate of the image change.

    [self.delegate imageView:self didChangeImage:self.image];

}

- (void)cut:(id)sender

{

    if ([self allowsCutCopyPaste])

    {

        [self copy: sender];

        [self setImage: nil];

    }

    // Notify our delegate of the image change.

    [self.delegate imageView:self didChangeImage:self.image];

}

@end