Add clipboard support for Mac

Source/Engine/Platform/Clipboard.h

@@ -6,6 +6,8 @@
 #include "Windows/WindowsClipboard.h"
 #elif PLATFORM_LINUX
 #include "Linux/LinuxClipboard.h"
+#elif PLATFORM_MAC
+#include "Mac/MacClipboard.h"
 #else
 #include "Base/ClipboardBase.h"
 #endif

Source/Engine/Platform/Mac/MacClipboard.h

@@ -0,0 +1,26 @@
+// Copyright (c) 2012-2022 Wojciech Figat. All rights reserved.
+
+#pragma once
+
+#if PLATFORM_MAC
+
+#include "Engine/Platform/Base/ClipboardBase.h"
+
+/// <summary>
+/// Mac platform implementation of the clipboard service.
+/// </summary>
+class FLAXENGINE_API MacClipboard : public ClipboardBase
+{
+public:
+
+    // [ClipboardBase]
+    static void Clear();
+    static void SetText(const StringView& text);
+    static void SetRawData(const Span<byte>& data);
+    static void SetFiles(const Array<String>& files);
+    static String GetText();
+    static Array<byte> GetRawData();
+    static Array<String> GetFiles();
+};
+
+#endif

Source/Engine/Platform/Mac/MacPlatform.cpp

@@ -106,6 +106,48 @@ Vector2 MacUtils::GetScreensOrigin()
     return result;
 }
 
+void MacClipboard::Clear()
+{
+    NSPasteboard* pasteboard = [NSPasteboard generalPasteboard];
+    [pasteboard clearContents];
+}
+
+void MacClipboard::SetText(const StringView& text)
+{
+    NSPasteboard* pasteboard = [NSPasteboard generalPasteboard];
+    [pasteboard clearContents];
+    [pasteboard writeObjects:[NSArray arrayWithObject:(NSString*)MacUtils::ToString(text)]];
+}
+
+void MacClipboard::SetRawData(const Span<byte>& data)
+{
+}
+
+void MacClipboard::SetFiles(const Array<String>& files)
+{
+}
+
+String MacClipboard::GetText()
+{
+    NSPasteboard* pasteboard = [NSPasteboard generalPasteboard];
+    NSArray* classes = [NSArray arrayWithObject:[NSString class]];
+    NSDictionary* options = [NSDictionary dictionary];
+    if (![pasteboard canReadObjectForClasses:classes options:options])
+        return String::Empty;
+    NSArray* objects = [pasteboard readObjectsForClasses:classes options:options];
+    return MacUtils::ToString((CFStringRef)[objects objectAtIndex:0]);
+}
+
+Array<byte> MacClipboard::GetRawData()
+{
+    return Array<byte>();
+}
+
+Array<String> MacClipboard::GetFiles()
+{
+    return Array<String>();
+}
+
 DialogResult MessageBox::Show(Window* parent, const StringView& text, const StringView& caption, MessageBoxButtons buttons, MessageBoxIcon icon)
 {
     if (CommandLine::Options.Headless)

Source/Engine/Platform/Types.h

@@ -229,8 +229,8 @@ typedef UserBase User;
 
 #elif PLATFORM_MAC
 
-class ClipboardBase;
-typedef ClipboardBase Clipboard;
+class MacClipboard;
+typedef MacClipboard Clipboard;
 class UnixCriticalSection;
 typedef UnixCriticalSection CriticalSection;
 class UnixConditionVariable;