Merge from vscode a4177f50c475fc0fa278a78235e3bee9ffdec781 (#8649)

* Merge from vscode a4177f50c475fc0fa278a78235e3bee9ffdec781

* distro

* fix tests

src/vs/base/common/codicons.ts

@@ -0,0 +1,29 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+const escapeCodiconsRegex = /(?<!\\)\$\([a-z0-9\-]+?(?:~[a-z0-9\-]*?)?\)/gi;
+export function escapeCodicons(text: string): string {
+	return text.replace(escapeCodiconsRegex, match => `\\${match}`);
+}
+
+const markdownEscapedCodiconsRegex = /\\\$\([a-z0-9\-]+?(?:~[a-z0-9\-]*?)?\)/gi;
+export function markdownEscapeEscapedCodicons(text: string): string {
+	// Need to add an extra \ for escaping in markdown
+	return text.replace(markdownEscapedCodiconsRegex, match => `\\${match}`);
+}
+
+const markdownUnescapeCodiconsRegex = /(?<!\\)\$\\\(([a-z0-9\-]+?(?:~[a-z0-9\-]*?)?)\\\)/gi;
+export function markdownUnescapeCodicons(text: string): string {
+	return text.replace(markdownUnescapeCodiconsRegex, (_, codicon) => `$(${codicon})`);
+}
+
+const renderCodiconsRegex = /(\\)?\$\((([a-z0-9\-]+?)(?:~([a-z0-9\-]*?))?)\)/gi;
+export function renderCodicons(text: string): string {
+	return text.replace(renderCodiconsRegex, (_, escape, codicon, name, animation) => {
+		return escape
+			? `$(${codicon})`
+			: `<span class="codicon codicon-${name}${animation ? ` codicon-animation-${animation}` : ''}"></span>`;
+	});
+}