New layout selector ui in user settings (#12676)

* feat: reworked the layout switcher

* feat: make the classname optional in EventTilePreview.tsx

* test: add tests to LayoutSwitcher

* feat: change appearance tab

* test: update appearance snapshot

* e2e: add tests

* css: add comment for gap overriding

playwright/e2e/settings/appearance-user-settings-tab/index.ts

@@ -14,11 +14,12 @@
  * limitations under the License.
  */
 
-import { Page } from "@playwright/test";
+import { Locator, Page } from "@playwright/test";
 
 import { ElementAppPage } from "../../../pages/ElementAppPage";
 import { test as base, expect } from "../../../element-web-test";
 import { SettingLevel } from "../../../../src/settings/SettingLevel";
+import { Layout } from "../../../../src/settings/enums/Layout";
 
 export { expect };
 
@@ -57,6 +58,21 @@ class Helpers {
         return this.app.settings.openUserSettings("Appearance");
     }
 
+    /**
+     * Compare screenshot and hide the matrix chat
+     * @param locator
+     * @param screenshot
+     */
+    assertScreenshot(locator: Locator, screenshot: `${string}.png`) {
+        return expect(locator).toMatchScreenshot(screenshot, {
+            css: `
+                   #matrixchat {
+                        display: none;
+                    }
+                `,
+        });
+    }
+
     // Theme Panel
 
     /**
@@ -136,4 +152,90 @@ class Helpers {
     removeCustomTheme() {
         return this.getThemePanel().getByRole("listitem", { name: this.CUSTOM_THEME.name }).getByRole("button").click();
     }
+
+    // Message layout Panel
+
+    /**
+     * Create and display a room named Test Room
+     */
+    async createAndDisplayRoom() {
+        await this.app.client.createRoom({ name: "Test Room" });
+        await this.app.viewRoomByName("Test Room");
+    }
+
+    /**
+     * Assert the room layout
+     * @param layout
+     * @private
+     */
+    private assertRoomLayout(layout: Layout) {
+        return expect(this.page.locator(`.mx_RoomView_body[data-layout=${layout}]`)).toBeVisible();
+    }
+
+    /**
+     * Assert the room layout is modern
+     */
+    assertModernLayout() {
+        return this.assertRoomLayout(Layout.Group);
+    }
+
+    /**
+     * Assert the room layout is bubble
+     */
+    assertBubbleLayout() {
+        return this.assertRoomLayout(Layout.Bubble);
+    }
+
+    /**
+     * Return the layout panel
+     */
+    getMessageLayoutPanel() {
+        return this.page.getByTestId("layoutPanel");
+    }
+
+    /**
+     * Return the layout radio button
+     * @param layoutName
+     * @private
+     */
+    private getLayout(layoutName: string) {
+        return this.getMessageLayoutPanel().getByRole("radio", { name: layoutName });
+    }
+
+    /**
+     * Return the message bubbles layout radio button
+     */
+    getBubbleLayout() {
+        return this.getLayout("Message bubbles");
+    }
+
+    /**
+     * Return the modern layout radio button
+     */
+    getModernLayout() {
+        return this.getLayout("Modern");
+    }
+
+    /**
+     * Return the IRC layout radio button
+     */
+    getIRCLayout() {
+        return this.getLayout("IRC (experimental)");
+    }
+
+    /**
+     * Return the compact layout checkbox
+     */
+    getCompactLayoutCheckbox() {
+        return this.getMessageLayoutPanel().getByRole("checkbox", { name: "Show compact text and messages" });
+    }
+
+    /**
+     * Assert the compact layout is enabled
+     */
+    assertCompactLayout() {
+        return expect(
+            this.page.locator("#matrixchat .mx_MatrixChat_wrapper.mx_MatrixChat_useCompactLayout"),
+        ).toBeVisible();
+    }
 }