feat: Added option to limit size of clipboard

README.md

@@ -43,6 +43,9 @@ This extension contributes the following settings (default values):
   // Time in milliseconds to check changes in clipboard. Set zero to disable.
   "clipboard-manager.checkInterval": 500,
 
+  // Maximum clipboard size in bytes.
+  "clipboard-manager.maxClipboardSize": 1000000,
+
   // Maximum number of clips to save in clipboard
   "clipboard-manager.maxClips": 100,
 

package.json

@@ -145,6 +145,11 @@
                         "default": 500,
                         "description": "Time in milliseconds to check changes in clipboard. Set zero to disable."
                     },
+                    "clipboard-manager.maxClipboardSize": {
+                        "type": "integer",
+                        "default": 1000000,
+                        "description": "Maximum clipboard size in bytes."
+                    },
                     "clipboard-manager.maxClips": {
                         "type": "integer",
                         "default": 100,

src/extension.ts

@@ -98,6 +98,7 @@ export async function activate(context: vscode.ExtensionContext) {
     const config = vscode.workspace.getConfiguration("clipboard-manager");
     monitor.checkInterval = config.get("checkInterval", 500);
     monitor.onlyWindowFocused = config.get("onlyWindowFocused", true);
+    monitor.maxClipboardSize = config.get("maxClipboardSize", 1000000);
   };
   updateConfig();
 

src/monitor.ts

@@ -23,6 +23,8 @@ export class Monitor implements vscode.Disposable {
 
   protected _timer: NodeJS.Timer | undefined;
 
+  public maxClipboardSize: number = 1000000;
+
   protected _checkInterval: number = 500;
   get checkInterval() {
     return this._checkInterval;
@@ -41,7 +43,7 @@ export class Monitor implements vscode.Disposable {
 
   constructor(readonly clipboard: BaseClipboard) {
     // Update current clipboard to check changes after init
-    this.clipboard.readText().then(value => {
+    this.readText().then(value => {
       this._previousText = value;
 
       // Initialize the checkInterval
@@ -74,10 +76,18 @@ export class Monitor implements vscode.Disposable {
     );
   }
 
+  protected async readText(): Promise<string> {
+    const text = await this.clipboard.readText();
+    if (text.length > this.maxClipboardSize) {
+      return "";
+    }
+    return text;
+  }
+
   protected async onDidChangeWindowState(state: vscode.WindowState) {
     // Prevent detect change from external copy
     if (this.onlyWindowFocused && state.focused) {
-      this._previousText = await this.clipboard.readText();
+      this._previousText = await this.readText();
     }
 
     this._windowFocused = state.focused;
@@ -89,7 +99,7 @@ export class Monitor implements vscode.Disposable {
       return;
     }
 
-    const newText = await this.clipboard.readText();
+    const newText = await this.readText();
     if (newText === this._previousText) {
       return;
     }