Adopt clipboard service in terminal

src/vs/workbench/contrib/terminal/browser/terminalActions.ts

@@ -607,12 +607,11 @@ export class TerminalPasteAction extends Action {
 		super(id, label);
 	}
 
-	public run(event?: any): Promise<any> {
+	public async run(event?: any): Promise<any> {
 		const instance = this.terminalService.getActiveOrCreateInstance();
 		if (instance) {
-			instance.paste();
+			await instance.paste();
 		}
-		return Promise.resolve(undefined);
 	}
 }
 

src/vs/workbench/contrib/terminal/browser/terminalInstance.ts

@@ -869,9 +869,9 @@ export class TerminalInstance implements ITerminalInstance {
 		return this._xtermReadyPromise.then(() => this.focus(force));
 	}
 
-	public paste(): void {
+	public async paste(): Promise<void> {
 		this.focus();
-		document.execCommand('paste');
+		this._xterm._core._coreService.triggerDataEvent(await this._clipboardService.readText(), true);
 	}
 
 	public write(text: string): void {

src/vs/workbench/contrib/terminal/common/terminal.ts

@@ -588,7 +588,7 @@ export interface ITerminalInstance {
 	/**
 	 * Focuses and pastes the contents of the clipboard into the terminal instance.
 	 */
-	paste(): void;
+	paste(): Promise<void>;
 
 	/**
 	 * Send text to the terminal instance. The text is written to the stdin of the underlying pty