From ed6ac63747174d2142c093498529199f94c59604 Mon Sep 17 00:00:00 2001
From: xianshenglu <xianshenglu@qq.com>
Date: Sun, 12 Nov 2023 00:01:04 +0800
Subject: [PATCH] fix: fix paste not working bug

---
 core/clipboard.js      | 20 ++++++++++++++------
 core/input/keyboard.js |  4 ++++
 core/rfb.js            | 10 +++++++++-
 3 files changed, 27 insertions(+), 7 deletions(-)

diff --git a/core/clipboard.js b/core/clipboard.js
index a4a68132..92182591 100644
--- a/core/clipboard.js
+++ b/core/clipboard.js
@@ -19,27 +19,35 @@ export default class Clipboard {
             navigator.clipboard.writeText(e.clipboardData.getData('text/plain')).catch(() => {/* Do nothing */});
         }
     }
-
+    /**
+     * @param {ClipboardEvent} e 
+     */
     _handlePaste(e) {
-        if (navigator.clipboard.readText) {
-            navigator.clipboard.readText().then(this.onpaste).catch(() => {/* Do nothing */});
-        } else if (e.clipboardData) {
+        if(!this._isVncEvent()){
+            return;
+        }
+        if(e.clipboardData){
             this.onpaste(e.clipboardData.getData('text/plain'));
         }
     }
+    _isVncEvent(){
+        const isTargetFocused = document.activeElement === this._target;
+        return isTargetFocused;
+    }
 
     // ===== PUBLIC METHODS =====
 
     grab() {
         if (!Clipboard.isSupported) return;
         this._target.addEventListener('copy', this._eventHandlers.copy);
-        this._target.addEventListener('paste', this._eventHandlers.paste);
+        // _target can not listen the paste event.
+        document.body.addEventListener('paste', this._eventHandlers.paste);
     }
 
     ungrab() {
         if (!Clipboard.isSupported) return;
         this._target.removeEventListener('copy', this._eventHandlers.copy);
-        this._target.removeEventListener('paste', this._eventHandlers.paste);
+        document.body.removeEventListener('paste', this._eventHandlers.paste);
     }
 }
 
diff --git a/core/input/keyboard.js b/core/input/keyboard.js
index 9068e9e9..d96f477f 100644
--- a/core/input/keyboard.js
+++ b/core/input/keyboard.js
@@ -85,6 +85,10 @@ export default class Keyboard {
 
     _handleKeyDown(e) {
         const code = this._getKeyCode(e);
+        const isCtrlVEvent = code === "KeyV" && e.ctrlKey;
+        if(isCtrlVEvent){
+            return;
+        }
         let keysym = KeyboardUtil.getKeysym(e);
         let numlock = e.getModifierState('NumLock');
         let capslock = e.getModifierState('CapsLock');
diff --git a/core/rfb.js b/core/rfb.js
index 0bf6ff24..efae90e3 100644
--- a/core/rfb.js
+++ b/core/rfb.js
@@ -261,7 +261,7 @@ export default class RFB extends EventTargetMixin {
         }
 
         this._clipboard = new Clipboard(this._canvas);
-        this._clipboard.onpaste = this.clipboardPasteFrom.bind(this);
+        this._clipboard.onpaste = this._handlePasteEvent.bind(this);
 
         this._keyboard = new Keyboard(this._canvas);
         this._keyboard.onkeyevent = this._handleKeyEvent.bind(this);
@@ -500,6 +500,14 @@ export default class RFB extends EventTargetMixin {
         this._canvas.blur();
     }
 
+    _handlePasteEvent(text){
+        this.clipboardPasteFrom(text);
+        this.sendKey(KeyTable.XK_Control_L, "ControlLeft", true)
+        this.sendKey(KeyTable.XK_V, "KeyV", true)
+        this.sendKey(KeyTable.XK_V, "KeyV", false)
+        this.sendKey(KeyTable.XK_Control_L, "ControlLeft", false)
+    }
+
     clipboardPasteFrom(text) {
         if (this._rfbConnectionState !== 'connected' || this._viewOnly) { return; }