SQL Operations Studio Public Preview 1 (0.23) release source code

src/vs/editor/common/modes/languageSelector.ts

@@ -0,0 +1,90 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the Source EULA. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+'use strict';
+
+import URI from 'vs/base/common/uri';
+import { match as matchGlobPattern } from 'vs/base/common/glob'; // TODO@Alex
+
+export interface LanguageFilter {
+	language?: string;
+	scheme?: string;
+	pattern?: string;
+}
+
+export type LanguageSelector = string | LanguageFilter | (string | LanguageFilter)[];
+
+export default function matches(selection: LanguageSelector, uri: URI, language: string): boolean {
+	return score(selection, uri, language) > 0;
+}
+
+export function score(selector: LanguageSelector, candidateUri: URI, candidateLanguage: string): number {
+
+	if (Array.isArray(selector)) {
+		// array -> take max individual value
+		let ret = 0;
+		for (const filter of selector) {
+			const value = score(filter, candidateUri, candidateLanguage);
+			if (value === 10) {
+				return value; // already at the highest
+			}
+			if (value > ret) {
+				ret = value;
+			}
+		}
+		return ret;
+
+	} else if (typeof selector === 'string') {
+		// short-hand notion, desugars to
+		// 'fooLang' -> [{ language: 'fooLang', scheme: 'file' }, { language: 'fooLang', scheme: 'untitled' }]
+		// '*' -> { language: '*', scheme: '*' }
+		if (selector === '*') {
+			return 5;
+		} else if (selector === candidateLanguage) {
+			return 10;
+		} else {
+			return 0;
+		}
+
+	} else if (selector) {
+		// filter -> select accordingly, use defaults for scheme
+		const { language, pattern, scheme } = selector;
+
+		let ret = 0;
+
+		if (scheme) {
+			if (scheme === candidateUri.scheme) {
+				ret = 10;
+			} else if (scheme === '*') {
+				ret = 5;
+			} else {
+				return 0;
+			}
+		}
+
+		if (language) {
+			if (language === candidateLanguage) {
+				ret = 10;
+			} else if (language === '*') {
+				ret = Math.max(ret, 5);
+			} else {
+				return 0;
+			}
+		}
+
+		if (pattern) {
+			if (pattern === candidateUri.fsPath || matchGlobPattern(pattern, candidateUri.fsPath)) {
+				ret = 10;
+			} else {
+				return 0;
+			}
+		}
+
+		return ret;
+
+	} else {
+		return 0;
+	}
+}