Merge commit 'be3e8236086165e5e45a5a10783823874b3f3ebd' as 'lib/vscode'

lib/vscode/src/vs/base/common/diff/diffChange.ts

@@ -0,0 +1,60 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+/**
+ * Represents information about a specific difference between two sequences.
+ */
+export class DiffChange {
+
+	/**
+	 * The position of the first element in the original sequence which
+	 * this change affects.
+	 */
+	public originalStart: number;
+
+	/**
+	 * The number of elements from the original sequence which were
+	 * affected.
+	 */
+	public originalLength: number;
+
+	/**
+	 * The position of the first element in the modified sequence which
+	 * this change affects.
+	 */
+	public modifiedStart: number;
+
+	/**
+	 * The number of elements from the modified sequence which were
+	 * affected (added).
+	 */
+	public modifiedLength: number;
+
+	/**
+	 * Constructs a new DiffChange with the given sequence information
+	 * and content.
+	 */
+	constructor(originalStart: number, originalLength: number, modifiedStart: number, modifiedLength: number) {
+		//Debug.Assert(originalLength > 0 || modifiedLength > 0, "originalLength and modifiedLength cannot both be <= 0");
+		this.originalStart = originalStart;
+		this.originalLength = originalLength;
+		this.modifiedStart = modifiedStart;
+		this.modifiedLength = modifiedLength;
+	}
+
+	/**
+	 * The end point (exclusive) of the change in the original sequence.
+	 */
+	public getOriginalEnd() {
+		return this.originalStart + this.originalLength;
+	}
+
+	/**
+	 * The end point (exclusive) of the change in the modified sequence.
+	 */
+	public getModifiedEnd() {
+		return this.modifiedStart + this.modifiedLength;
+	}
+}