Prepping to move completion provider to a re-usable module

extensions/emmet/src/defaultCompletionProvider.ts

@@ -0,0 +1,64 @@
+/*---------------------------------------------------------------------------------------------
+ *  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 parseStylesheet from '@emmetio/css-parser';
+import parse from '@emmetio/html-matcher';
+import Node from '@emmetio/node';
+import { DocumentStreamReader } from './emmetForVSCode/bufferStream';
+import { isStyleSheet, getNode, getInnerRange } from './emmetForVSCode/emmetUtils';
+import { EmmetCompletionItemProvider } from './emmetForVSCode/emmetCompletionProvider';
+import { isValidLocationForEmmetAbbreviation } from './abbreviationActions';
+import { getSyntax } from './util';
+
+export class DefaultCompletionItemProvider implements vscode.CompletionItemProvider {
+	private _mappedSyntax = false;
+	constructor(mappedSyntax?: boolean) {
+		if (mappedSyntax) {
+			this._mappedSyntax = mappedSyntax;
+		}
+	}
+	public provideCompletionItems(document: vscode.TextDocument, position: vscode.Position, token: vscode.CancellationToken): Thenable<vscode.CompletionList> {
+		let syntax = getSyntax(document);
+		if (!this._mappedSyntax) {
+			syntax = this.syntaxHelper(syntax, document, position);
+		}
+		if (!syntax) {
+			return;
+		}
+
+		const emmetCompletionProvider = new EmmetCompletionItemProvider(syntax);
+		return emmetCompletionProvider.provideCompletionItems(document, position, token);
+	}
+
+	/**
+	 * Checks whether given position is valid for emmet abbreviation and returns appropriate syntax
+	 * @param syntax string language mode of current document
+	 * @param document vscode.Textdocument
+	 * @param position vscode.Position position of the abbreviation that needs to be expanded
+	 */
+	private syntaxHelper(syntax: string, document: vscode.TextDocument, position: vscode.Position): string {
+		let parseContent = isStyleSheet(syntax) ? parseStylesheet : parse;
+		let rootNode: Node = parseContent(new DocumentStreamReader(document));
+		let currentNode = getNode(rootNode, position);
+
+		if (!isStyleSheet(syntax)
+			&& currentNode
+			&& currentNode.close
+			&& currentNode.name === 'style'
+			&& getInnerRange(currentNode).contains(position)) {
+			return 'css';
+		}
+
+		if (!isValidLocationForEmmetAbbreviation(currentNode, syntax, position)) {
+			return;
+		}
+		return syntax;
+	}
+
+
+
+
+}