Merge commit 'be3e8236086165e5e45a5a10783823874b3f3ebd' as 'lib/vscode'

lib/vscode/src/vs/base/common/linkedText.ts

@@ -0,0 +1,55 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import { memoize } from 'vs/base/common/decorators';
+
+export interface ILink {
+	readonly label: string;
+	readonly href: string;
+	readonly title?: string;
+}
+
+export type LinkedTextNode = string | ILink;
+
+export class LinkedText {
+
+	constructor(readonly nodes: LinkedTextNode[]) { }
+
+	@memoize
+	toString(): string {
+		return this.nodes.map(node => typeof node === 'string' ? node : node.label).join('');
+	}
+}
+
+const LINK_REGEX = /\[([^\]]+)\]\(((?:https?:\/\/|command:)[^\)\s]+)(?: ("|')([^\3]+)(\3))?\)/gi;
+
+export function parseLinkedText(text: string): LinkedText {
+	const result: LinkedTextNode[] = [];
+
+	let index = 0;
+	let match: RegExpExecArray | null;
+
+	while (match = LINK_REGEX.exec(text)) {
+		if (match.index - index > 0) {
+			result.push(text.substring(index, match.index));
+		}
+
+		const [, label, href, , title] = match;
+
+		if (title) {
+			result.push({ label, href, title });
+		} else {
+			result.push({ label, href });
+		}
+
+		index = match.index + match[0].length;
+	}
+
+	if (index < text.length) {
+		result.push(text.substring(index));
+	}
+
+	return new LinkedText(result);
+}