fix(completion): add TextEdit for fix #79

Author: yoyo930021

src/providers/completion.ts

@@ -1,6 +1,14 @@
 'use strict';
 
-import { CompletionList, CompletionItemKind, TextDocument, Files, CompletionItem } from 'vscode-languageserver';
+import {
+	CompletionList,
+	CompletionItemKind,
+	TextDocument,
+	Files,
+	CompletionItem,
+	Range,
+	TextEdit
+} from 'vscode-languageserver';
 
 import { IMixin, ISymbols } from '../types/symbols';
 import { ISettings } from '../types/settings';
@@ -221,6 +229,23 @@ function createFunctionCompletionItems(
 	return completions;
 }
 
+function convertRange(document: TextDocument, offset: number, text: string) {
+	const start =
+		offset -
+		document
+			.getText()
+			.slice(0, offset)
+			.split('')
+			.reverse()
+			.findIndex(el => el === ' ' || el === ':');
+	const startPosition = document.positionAt(start);
+	const endPosition = document.positionAt(start + text.length);
+	return Range.create(startPosition, endPosition);
+}
+
+/**
+ * Do Completion :)
+ */
 export async function doCompletion(
 	document: TextDocument,
 	offset: number,
@@ -265,5 +290,10 @@ export async function doCompletion(
 		completions.items = completions.items.concat(functions);
 	}
 
+	completions.items = completions.items.map(el => ({
+		...el,
+		textEdit: TextEdit.replace(convertRange(document, offset, el.insertText ?? el.label), el.insertText ?? el.label)
+	}));
+
 	return completions;
 }