add markdown-language-features to sqlops (#2338)

extensions/markdown-language-features/src/commands/openDocumentLink.ts

@@ -0,0 +1,75 @@
+/*---------------------------------------------------------------------------------------------
+ *  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';
+import * as path from 'path';
+
+import { Command } from '../commandManager';
+import { MarkdownEngine } from '../markdownEngine';
+import { TableOfContentsProvider } from '../tableOfContentsProvider';
+import { isMarkdownFile } from '../util/file';
+
+
+export interface OpenDocumentLinkArgs {
+	path: string;
+	fragment: string;
+}
+
+export class OpenDocumentLinkCommand implements Command {
+	private static readonly id = '_markdown.openDocumentLink';
+	public readonly id = OpenDocumentLinkCommand.id;
+
+	public static createCommandUri(
+		path: string,
+		fragment: string
+	): vscode.Uri {
+		return vscode.Uri.parse(`command:${OpenDocumentLinkCommand.id}?${encodeURIComponent(JSON.stringify({ path, fragment }))}`);
+	}
+
+	public constructor(
+		private readonly engine: MarkdownEngine
+	) { }
+
+	public execute(args: OpenDocumentLinkArgs) {
+		const p = decodeURIComponent(args.path);
+		return this.tryOpen(p, args).catch(() => {
+			if (path.extname(p) === '') {
+				return this.tryOpen(p + '.md', args);
+			}
+			const resource = vscode.Uri.file(p);
+			return Promise.resolve(void 0)
+				.then(() => vscode.commands.executeCommand('vscode.open', resource))
+				.then(() => void 0);
+		});
+	}
+
+	private async tryOpen(path: string, args: OpenDocumentLinkArgs) {
+		if (vscode.window.activeTextEditor && isMarkdownFile(vscode.window.activeTextEditor.document) && vscode.window.activeTextEditor.document.uri.fsPath === path) {
+			return this.tryRevealLine(vscode.window.activeTextEditor, args.fragment);
+		} else {
+			const resource = vscode.Uri.file(path);
+			return vscode.workspace.openTextDocument(resource)
+				.then(vscode.window.showTextDocument)
+				.then(editor => this.tryRevealLine(editor, args.fragment));
+		}
+	}
+
+	private async tryRevealLine(editor: vscode.TextEditor, fragment?: string) {
+		if (editor && fragment) {
+			const toc = new TableOfContentsProvider(this.engine, editor.document);
+			const entry = await toc.lookup(fragment);
+			if (entry) {
+				return editor.revealRange(new vscode.Range(entry.line, 0, entry.line, 0), vscode.TextEditorRevealType.AtTop);
+			}
+			const lineNumberFragment = fragment.match(/^L(\d+)$/);
+			if (lineNumberFragment) {
+				const line = +lineNumberFragment[1] - 1;
+				if (!isNaN(line)) {
+					return editor.revealRange(new vscode.Range(line, 0, line, 0), vscode.TextEditorRevealType.AtTop);
+				}
+			}
+		}
+	}
+}