Move stream renderer to extension, support merging.

extensions/notebook-renderers/src/textHelper.ts

@@ -0,0 +1,38 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { handleANSIOutput } from './ansi';
+
+// const SIZE_LIMIT = 65535;
+
+export function truncatedArrayOfString(outputs: string[], linesLimit: number, container: HTMLElement) {
+	// const fullLen = outputs.reduce((p, c) => {
+	// 	return p + c.length;
+	// }, 0);
+
+	let buffer = outputs.join('\n').split(/\r|\n|\r\n/g);
+	let lineCount = buffer.length;
+
+	if (lineCount < linesLimit) {
+		const spanElement = handleANSIOutput(buffer.slice(0, linesLimit).join('\n'));
+		container.appendChild(spanElement);
+		return;
+	}
+
+	// container.appendChild(generateViewMoreElement(notebookUri, cellViewModel, outputId, disposables, openerService));
+
+	const div = document.createElement('div');
+	container.appendChild(div);
+	div.appendChild(handleANSIOutput(buffer.slice(0, linesLimit - 5).join('\n')));
+
+	// view more ...
+	const viewMoreSpan = document.createElement('span');
+	viewMoreSpan.innerText = '...';
+	container.appendChild(viewMoreSpan);
+
+	const div2 = document.createElement('div');
+	container.appendChild(div2);
+	div2.appendChild(handleANSIOutput(buffer.slice(linesLimit - 5).join('\n')));
+}