api: expose vscode.computeDiff

src/vs/workbench/api/node/extHostFunctions.ts

@@ -0,0 +1,30 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+'use strict';
+
+import * as vscode from 'vscode';
+import { toThenable } from 'vs/base/common/async';
+import { DiffComputer } from 'vs/editor/common/diff/diffComputer';
+
+function getTextDocumentLines(document: vscode.TextDocument): string[] {
+	const result = [];
+	for (let i = 0; i < document.lineCount; i++) {
+		result.push(document.lineAt(i).text);
+	}
+	return result;
+}
+
+export function computeDiff(oneDocument: vscode.TextDocument, otherDocument: vscode.TextDocument): Thenable<vscode.LineChange[]> {
+	const oneLines = getTextDocumentLines(oneDocument);
+	const otherLines = getTextDocumentLines(otherDocument);
+	const computer = new DiffComputer(oneLines, otherLines, {
+		shouldPostProcessCharChanges: false,
+		shouldIgnoreTrimWhitespace: false, // options?
+		shouldConsiderTrimWhitespaceInEmptyCase: false
+	});
+
+	return toThenable(computer.computeDiff());
+}