Add 'RFB::clipboardreceived' event

core/rfb.js

@@ -2335,12 +2335,14 @@ export default class RFB extends EventTargetMixin {
 
     _writeClipboard(text) {
         if (this._viewOnly) return;
-        if (this._asyncClipboard.writeClipboard(text)) return;
+        if (!(this._asyncClipboard.writeClipboard(text))) {
             // Fallback clipboard
             this.dispatchEvent(
                 new CustomEvent("clipboard", {detail: {text: text}})
             );
         }
+        this.dispatchEvent(new CustomEvent("clipboardreceived"));
+    }
 
     _handleServerCutText() {
         Log.Debug("ServerCutText");

docs/API.md

@@ -96,6 +96,12 @@ protocol stream.
   - The `clipboard` event is fired when clipboard data is received from
     the server.
 
+['clipboardreceived'](#clipboardreceived)
+  - The `clipboardreceived` event is fired after the `clipboard` event
+    or after the clipboard has been updated through the
+    [Clipboard module](API-internal.md#11-module-list). The copied text
+    has already been written to the system clipboard or the clipboard panel.
+
 [`clippingviewport`](#clippingviewport)
   - The `clippingviewport` event is fired when `RFB.clippingViewport` is
     updated.