Adding upstream version 0.7.0+dfsg.

Signed-off-by: Daniel Baumann <daniel@debian.org>

clipboard_darwin.m

@@ -0,0 +1,63 @@
+// Copyright 2021 The golang.design Initiative Authors.
+// All rights reserved. Use of this source code is governed
+// by a MIT license that can be found in the LICENSE file.
+//
+// Written by Changkun Ou <changkun.de>
+
+//go:build darwin && !ios
+// +build darwin,!ios
+
+// Interact with NSPasteboard using Objective-C
+// https://developer.apple.com/documentation/appkit/nspasteboard?language=objc
+
+#import <Foundation/Foundation.h>
+#import <Cocoa/Cocoa.h>
+
+unsigned int clipboard_read_string(void **out) {
+	NSPasteboard * pasteboard = [NSPasteboard generalPasteboard];
+	NSData *data = [pasteboard dataForType:NSPasteboardTypeString];
+	if (data == nil) {
+		return 0;
+	}
+	NSUInteger siz = [data length];
+	*out = malloc(siz);
+	[data getBytes: *out length: siz];
+	return siz;
+}
+
+unsigned int clipboard_read_image(void **out) {
+	NSPasteboard * pasteboard = [NSPasteboard generalPasteboard];
+	NSData *data = [pasteboard dataForType:NSPasteboardTypePNG];
+	if (data == nil) {
+		return 0;
+	}
+	NSUInteger siz = [data length];
+	*out = malloc(siz);
+	[data getBytes: *out length: siz];
+	return siz;
+}
+
+int clipboard_write_string(const void *bytes, NSInteger n) {
+	NSPasteboard *pasteboard = [NSPasteboard generalPasteboard];
+	NSData *data = [NSData dataWithBytes: bytes length: n];
+	[pasteboard clearContents];
+	BOOL ok = [pasteboard setData: data forType:NSPasteboardTypeString];
+	if (!ok) {
+		return -1;
+	}
+	return 0;
+}
+int clipboard_write_image(const void *bytes, NSInteger n) {
+	NSPasteboard *pasteboard = [NSPasteboard generalPasteboard];
+	NSData *data = [NSData dataWithBytes: bytes length: n];
+	[pasteboard clearContents];
+	BOOL ok = [pasteboard setData: data forType:NSPasteboardTypePNG];
+	if (!ok) {
+		return -1;
+	}
+	return 0;
+}
+
+NSInteger clipboard_change_count() {
+	return [[NSPasteboard generalPasteboard] changeCount];
+}