add combine snippets by language feature (#33)

src/snippets/snippetLoader.ts

@@ -90,13 +90,22 @@ export class SnippetLoader {
 					);
 					snippetFiles.push(snippetFile);
 			  });
-				await Promise.all(snippetFiles.map((file: SnippetFile) => this.getSnippets(file, extensionId)));
+				await Promise.all(snippetFiles.map((file: SnippetFile) => this.getFileSnippets(file)));
 			}
 		}
 		return Promise.resolve(snippetFiles);
 	}
 
-	async getSnippets(snippetFile: SnippetFile, extensionId?: string): Promise<Snippet[]> {
+	async getSnippets(snippetLanguage: SnippetLanguage): Promise<Snippet[]> {
+		const fileSnippets: Snippet[][] = await Promise.all(
+			snippetLanguage.snippetFiles.map((file: SnippetFile) => this.getFileSnippets(file))
+		);
+		const snippets: Snippet[] = [];
+		fileSnippets.forEach(file => file.map(snippet => snippets.push(snippet)));
+		return Promise.resolve(snippets);
+	}
+
+	async getFileSnippets(snippetFile: SnippetFile): Promise<Snippet[]> {
 		return new Promise((resolve, reject) => {
 			fs.readFile(snippetFile.filePath, 'utf8', (error, snippetsConfig) => {
 				if (error) {

src/snippets/snippetTreeDataProvider.ts

@@ -32,13 +32,26 @@ export class SnippetTreeDataProvider implements TreeDataProvider<SnippetLanguage
 
 	async getChildren(element?: SnippetLanguage | SnippetFile): Promise<SnippetLanguage[] | SnippetFile[] | Snippet[]> {
 		if (!element) {
+			// get languages from built-in extensions and snippets extensions
 			return await this.snippetLoader.getSnippetLanguages();
 		}
 		else if (element instanceof SnippetLanguage) {
+			const combineLanguageSnippets: boolean = 
+				<boolean>workspace.getConfiguration('snippets.viewer').get('combineLanguageSnippets');
+			if (combineLanguageSnippets) {
+				const sortSnippetsByName: boolean = 
+					<boolean>workspace.getConfiguration('snippets.viewer').get('sortSnippetsByName');
+					let snippets = await this.snippetLoader.getSnippets(element);
+					if (sortSnippetsByName) {
+						snippets = snippets.sort((a, b) => a.name.localeCompare(b.name));
+					}
+					return snippets;
+			}
 			return element.snippetFiles.sort((a, b) => a.label.localeCompare(b.label));
 		}
 		else if (element instanceof SnippetFile) {
-			let snippets = await this.snippetLoader.getSnippets(element);
+			// get snippets for a snippet file
+			let snippets = await this.snippetLoader.getFileSnippets(element);
 			const sortSnippetsByName: boolean = 
 				<boolean>workspace.getConfiguration('snippets.viewer').get('sortSnippetsByName');
 			if (sortSnippetsByName) {

test/.vscode/settings.json

@@ -1,4 +1,6 @@
 {
   "editor.tabSize": 2,
-  "snippets.viewer.skipLanguageSnippets": "bat, c, csharp, cpp, coffeescript, fsharp, javascriptreact, typescriptreact, swift, vb, wat"
+  "snippets.viewer.skipLanguageSnippets": "bat, c, csharp, cpp, coffeescript, fsharp, javascriptreact, typescriptreact, swift, vb, wat",
+  "snippets.viewer.sortSnippetsByName": true,
+  "snippets.viewer.combineLanguageSnippets": true
 }