1 files changed, 63 insertions, 0 deletions
diff --git a/remote/test/puppeteer/packages/puppeteer-core/src/common/EmulationManager.ts b/remote/test/puppeteer/packages/puppeteer-core/src/common/EmulationManager.ts
new file mode 100644
index 0000000000..27aa57581c
--- /dev/null
+++ b/remote/test/puppeteer/packages/puppeteer-core/src/common/EmulationManager.ts
@@ -0,0 +1,63 @@
+/**
+ * Copyright 2017 Google Inc. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import {Protocol} from 'devtools-protocol';
+
+import {CDPSession} from './Connection.js';
+import {Viewport} from './PuppeteerViewport.js';
+
+/**
+ * @internal
+ */
+export class EmulationManager {
+  #client: CDPSession;
+  #emulatingMobile = false;
+  #hasTouch = false;
+
+  constructor(client: CDPSession) {
+    this.#client = client;
+  }
+
+  async emulateViewport(viewport: Viewport): Promise<boolean> {
+    const mobile = viewport.isMobile || false;
+    const width = viewport.width;
+    const height = viewport.height;
+    const deviceScaleFactor = viewport.deviceScaleFactor ?? 1;
+    const screenOrientation: Protocol.Emulation.ScreenOrientation =
+      viewport.isLandscape
+        ? {angle: 90, type: 'landscapePrimary'}
+        : {angle: 0, type: 'portraitPrimary'};
+    const hasTouch = viewport.hasTouch || false;
+
+    await Promise.all([
+      this.#client.send('Emulation.setDeviceMetricsOverride', {
+        mobile,
+        width,
+        height,
+        deviceScaleFactor,
+        screenOrientation,
+      }),
+      this.#client.send('Emulation.setTouchEmulationEnabled', {
+        enabled: hasTouch,
+      }),
+    ]);
+
+    const reloadNeeded =
+      this.#emulatingMobile !== mobile || this.#hasTouch !== hasTouch;
+    this.#emulatingMobile = mobile;
+    this.#hasTouch = hasTouch;
+    return reloadNeeded;
+  }
+}