Desktop: Resolves #11687: Plugins: Allow editor plugins to support multiple windows (#12041)

packages/app-desktop/integration-tests/resources/test-plugins/multipleEditorPlugins.js

@@ -0,0 +1,46 @@
+// Allows referencing the Joplin global:
+/* eslint-disable no-undef */
+
+// Allows the `joplin-manifest` block comment:
+/* eslint-disable multiline-comment-style */
+
+/* joplin-manifest:
+{
+	"id": "org.joplinapp.plugins.example.editorPlugin",
+	"manifest_version": 1,
+	"app_min_version": "3.1",
+	"name": "JS Bundle test",
+	"description": "JS Bundle Test plugin",
+	"version": "1.0.0",
+	"author": "",
+	"homepage_url": "https://joplinapp.org"
+}
+*/
+
+const registerEditorPlugin = async (editorViewId) => {
+	const editors = joplin.views.editors;
+	await editors.register(editorViewId, {
+		async onSetup(view) {
+			await editors.setHtml(
+				view,
+				`<div id="frame-summary">
+					Editor plugin:
+					<code id="view-id-base">${editorViewId}</code>
+					for view handle: <code>${encodeURI(view)}</code>
+				</div>`,
+			);
+		},
+		async onActivationCheck(_event) {
+			// Always enable
+			return true;
+		},
+	});
+};
+
+joplin.plugins.register({
+	onStart: async function() {
+		// Register two different editor plugins:
+		await registerEditorPlugin('test-editor-plugin-1');
+		await registerEditorPlugin('test-editor-plugin-2');
+	},
+});