Move isMarkdownFile to own file

extensions/markdown/src/commands/openDocumentLink.ts

@@ -9,7 +9,7 @@ import * as path from 'path';
 import { Command } from '../commandManager';
 import { MarkdownEngine } from '../markdownEngine';
 import { TableOfContentsProvider } from '../tableOfContentsProvider';
-import { isMarkdownFile } from '../features/previewContentProvider';
+import { isMarkdownFile } from '../util/file';
 
 
 export interface OpenDocumentLinkArgs {

extensions/markdown/src/features/previewContentProvider.ts

@@ -18,10 +18,6 @@ const previewStrings = {
 	cspAlertMessageLabel: localize('preview.securityMessage.label', 'Content Disabled Security Warning')
 };
 
-export function isMarkdownFile(document: vscode.TextDocument) {
-	return document.languageId === 'markdown';
-}
-
 export class MarkdownPreviewConfig {
 	public static getConfigForResource(resource: vscode.Uri) {
 		return new MarkdownPreviewConfig(resource);

extensions/markdown/src/features/previewManager.ts

@@ -6,10 +6,11 @@
 import * as vscode from 'vscode';
 
 import { Logger } from '../logger';
-import { MarkdownContentProvider, PreviewConfigManager, isMarkdownFile } from './previewContentProvider';
+import { MarkdownContentProvider, PreviewConfigManager } from './previewContentProvider';
 import { MarkdownPreview, PreviewSettings } from './preview';
 import { disposeAll } from '../util/dispose';
 import { MarkdownFileTopmostLineMonitor } from '../util/topmostLineMonitor';
+import { isMarkdownFile } from '../util/file';
 
 export class MarkdownPreviewManager {
 	private static readonly markdownPreviewActiveContextKey = 'markdownPreviewFocus';

extensions/markdown/src/util/file.ts

+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *  Licensed under the MIT License. See License.txt in the project root for license information.
+ *--------------------------------------------------------------------------------------------*/
+
+import * as vscode from 'vscode';
+
+export function isMarkdownFile(document: vscode.TextDocument) {
+	return document.languageId === 'markdown';
+}
\ No newline at end of file

extensions/markdown/src/util/topmostLineMonitor.ts

@@ -6,7 +6,7 @@
 import * as vscode from 'vscode';
 
 import { disposeAll } from '../util/dispose';
-import { isMarkdownFile } from '../features/previewContentProvider';
+import { isMarkdownFile } from './file';
 
 
 export class MarkdownFileTopmostLineMonitor {