Make lines below cursor require continuation

Author: Tyriar

src/vs/platform/terminal/common/capabilities/commandDetection/promptInputModel.ts

@@ -113,13 +113,14 @@ export class PromptInputModel extends Disposable implements IPromptInputModel {
 			return;
 		}
 
+		// Command start line
 		this._value = commandLine.substring(this._commandStartX);
 		this._cursorIndex = Math.max(buffer.cursorX - this._commandStartX, 0);
 
 		// IDEA: Reinforce knowledge of prompt to avoid incorrect commandStart
 		// IDEA: Detect ghost text based on SGR and cursor
 
-		// Add multi-lines
+		// From command start line to cursor line
 		const absoluteCursorY = buffer.baseY + buffer.cursorY;
 		for (let y = commandStartY + 1; y <= absoluteCursorY; y++) {
 			let lineText = buffer.getLine(y)?.translateToString(true);
@@ -140,13 +141,15 @@ export class PromptInputModel extends Disposable implements IPromptInputModel {
 			}
 		}
 
-		// Check lines below the cursor for continuations
+		// Below cursor line
 		for (let y = absoluteCursorY + 1; y < buffer.baseY + this._xterm.rows; y++) {
 			const lineText = buffer.getLine(y)?.translateToString(true);
-			if (lineText && this._lineContainsContinuationPrompt(lineText)) {
-				this._value += `\n${this._trimContinuationPrompt(lineText)}`;
-			} else {
-				break;
+			if (lineText) {
+				if (this._continuationPrompt === undefined || this._lineContainsContinuationPrompt(lineText)) {
+					this._value += `\n${this._trimContinuationPrompt(lineText)}`;
+				} else {
+					break;
+				}
 			}
 		}