feat: add a button to evaluate jsonnet files on titlebar; preview evaluation result in splited editor (#34)

Author: lyh543

package.json

@@ -36,6 +36,14 @@
 					"group": "navigation",
 					"when": "false"
 				}
+			],
+			"editor/title": [
+				{
+					"command": "jsonnet.evalFile",
+					"alt": "jsonnet.evalFileYaml",
+					"group": "navigation",
+					"when": "resourceLangId == jsonnet"
+				}
 			]
 		},
 		"commands": [
@@ -47,12 +55,14 @@
 			{
 				"command": "jsonnet.evalFile",
 				"title": "Jsonnet: Evaluate File",
-				"enablement": "resourceLangId == jsonnet"
+				"enablement": "resourceLangId == jsonnet",
+				"icon": "$(open-preview)"
 			},
 			{
 				"command": "jsonnet.evalFileYaml",
 				"title": "Jsonnet: Evaluate File (YAML)",
-				"enablement": "resourceLangId == jsonnet"
+				"enablement": "resourceLangId == jsonnet",
+				"icon": "$(open-preview)"
 			},
 			{
 				"command": "jsonnet.evalExpression",

src/extension.ts

@@ -1,5 +1,5 @@
 import * as path from 'path';
-import { commands, window, workspace, ExtensionContext, Uri, OutputChannel, TextEditor } from 'vscode';
+import { commands, window, workspace, ExtensionContext, Uri, OutputChannel, TextEditor, ViewColumn } from 'vscode';
 import * as fs from 'fs';
 import * as os from 'os';
 import { stringify as stringifyYaml } from 'yaml';
@@ -95,7 +95,10 @@ function evalAndDisplay(params: ExecuteCommandParams, yaml: boolean): void {
 				uri = Uri.file(tempYamlFile);
 				fs.writeFileSync(tempYamlFile, yamlString);
 			}
-			window.showTextDocument(uri, { preview: true });
+			window.showTextDocument(uri, {
+				preview: true,
+				viewColumn: ViewColumn.Beside
+			});
 		})
 		.catch(err => {
 			window.showErrorMessage(err.message);