From 7c89ec051a3ac605b2a64a0c1431801c7badbfcd Mon Sep 17 00:00:00 2001
From: Pavel Feldman <pavel.feldman@gmail.com>
Date: Sun, 13 Dec 2020 08:14:32 -0800
Subject: [PATCH] feat(adb): expose a11y tree (#4694)

---
 bin/android-driver.apk                        | Bin 582144 -> 580631 bytes
 src/client/android.ts                         |   6 ++
 src/dispatchers/androidDispatcher.ts          |   4 +
 src/protocol/channels.ts                      |   7 ++
 src/protocol/protocol.yml                     |   7 ++
 src/protocol/validator.ts                     |   2 +
 .../androiddriver/InstrumentedTest.java       |  78 ++++++++++++++++--
 7 files changed, 96 insertions(+), 8 deletions(-)

diff --git a/bin/android-driver.apk b/bin/android-driver.apk
index bb51655417a6a662d59c36c46212c040cb1b413e..66cc5a2c0af6f249adfb7ed3e233756b34f5e246 100644
GIT binary patch
delta 11651
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diff --git a/src/client/android.ts b/src/client/android.ts
index 6957511ddd..339c48180f 100644
--- a/src/client/android.ts
+++ b/src/client/android.ts
@@ -185,6 +185,12 @@ export class AndroidDevice extends ChannelOwner<channels.AndroidDeviceChannel, c
     });
   }
 
+  async tree(): Promise<apiInternal.AndroidElementInfo> {
+    return await this._wrapApiCall('androidDevice.tree', async () => {
+      return (await this._channel.tree()).tree;
+    });
+  }
+
   async close() {
     return this._wrapApiCall('androidDevice.close', async () => {
       await this._channel.close();
diff --git a/src/dispatchers/androidDispatcher.ts b/src/dispatchers/androidDispatcher.ts
index ecb1083f2d..a952a8d32e 100644
--- a/src/dispatchers/androidDispatcher.ts
+++ b/src/dispatchers/androidDispatcher.ts
@@ -102,6 +102,10 @@ export class AndroidDeviceDispatcher extends Dispatcher<AndroidDevice, channels.
     return { info: await this._object.send('info', params) };
   }
 
+  async tree(params: channels.AndroidDeviceTreeParams): Promise<channels.AndroidDeviceTreeResult> {
+    return { tree: await this._object.send('tree', params) };
+  }
+
   async inputType(params: channels.AndroidDeviceInputTypeParams) {
     const text = params.text;
     const keyCodes: number[] = [];
diff --git a/src/protocol/channels.ts b/src/protocol/channels.ts
index 9c3b040019..dd60c8adbd 100644
--- a/src/protocol/channels.ts
+++ b/src/protocol/channels.ts
@@ -2461,6 +2461,7 @@ export interface AndroidDeviceChannel extends Channel {
   scroll(params: AndroidDeviceScrollParams, metadata?: Metadata): Promise<AndroidDeviceScrollResult>;
   swipe(params: AndroidDeviceSwipeParams, metadata?: Metadata): Promise<AndroidDeviceSwipeResult>;
   info(params: AndroidDeviceInfoParams, metadata?: Metadata): Promise<AndroidDeviceInfoResult>;
+  tree(params?: AndroidDeviceTreeParams, metadata?: Metadata): Promise<AndroidDeviceTreeResult>;
   inputType(params: AndroidDeviceInputTypeParams, metadata?: Metadata): Promise<AndroidDeviceInputTypeResult>;
   inputPress(params: AndroidDeviceInputPressParams, metadata?: Metadata): Promise<AndroidDeviceInputPressResult>;
   inputTap(params: AndroidDeviceInputTapParams, metadata?: Metadata): Promise<AndroidDeviceInputTapResult>;
@@ -2594,6 +2595,11 @@ export type AndroidDeviceInfoOptions = {
 export type AndroidDeviceInfoResult = {
   info: AndroidElementInfo,
 };
+export type AndroidDeviceTreeParams = {};
+export type AndroidDeviceTreeOptions = {};
+export type AndroidDeviceTreeResult = {
+  tree: AndroidElementInfo,
+};
 export type AndroidDeviceInputTypeParams = {
   text: string,
 };
@@ -2802,6 +2808,7 @@ export type AndroidSelector = {
 };
 
 export type AndroidElementInfo = {
+  children?: AndroidElementInfo[],
   clazz: string,
   desc: string,
   res: string,
diff --git a/src/protocol/protocol.yml b/src/protocol/protocol.yml
index c243c87b0d..ad82b20c6d 100644
--- a/src/protocol/protocol.yml
+++ b/src/protocol/protocol.yml
@@ -2200,6 +2200,10 @@ AndroidDevice:
       returns:
         info: AndroidElementInfo
 
+    tree:
+      returns:
+        tree: AndroidElementInfo
+
     inputType:
       parameters:
         text: string
@@ -2369,6 +2373,9 @@ AndroidSelector:
 AndroidElementInfo:
   type: object
   properties:
+    children:
+      type: array?
+      items: AndroidElementInfo
     clazz: string
     desc: string
     res: string
diff --git a/src/protocol/validator.ts b/src/protocol/validator.ts
index 013598a0a8..16c8363dc5 100644
--- a/src/protocol/validator.ts
+++ b/src/protocol/validator.ts
@@ -965,6 +965,7 @@ export function createScheme(tChannel: (name: string) => Validator): Scheme {
   scheme.AndroidDeviceInfoParams = tObject({
     selector: tType('AndroidSelector'),
   });
+  scheme.AndroidDeviceTreeParams = tOptional(tObject({}));
   scheme.AndroidDeviceInputTypeParams = tObject({
     text: tString,
   });
@@ -1074,6 +1075,7 @@ export function createScheme(tChannel: (name: string) => Validator): Scheme {
     text: tOptional(tString),
   });
   scheme.AndroidElementInfo = tObject({
+    children: tOptional(tArray(tType('AndroidElementInfo'))),
     clazz: tString,
     desc: tString,
     res: tString,
diff --git a/src/server/android/driver/app/src/androidTest/java/com/microsoft/playwright/androiddriver/InstrumentedTest.java b/src/server/android/driver/app/src/androidTest/java/com/microsoft/playwright/androiddriver/InstrumentedTest.java
index 4c9cb6d7af..f8e930e61c 100644
--- a/src/server/android/driver/app/src/androidTest/java/com/microsoft/playwright/androiddriver/InstrumentedTest.java
+++ b/src/server/android/driver/app/src/androidTest/java/com/microsoft/playwright/androiddriver/InstrumentedTest.java
@@ -16,11 +16,13 @@
 
 package com.microsoft.playwright.androiddriver;
 
+import android.bluetooth.BluetoothClass;
 import android.graphics.Point;
 import android.graphics.Rect;
 import android.net.LocalServerSocket;
 import android.net.LocalSocket;
 import android.os.Bundle;
+import android.view.accessibility.AccessibilityNodeInfo;
 
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 import androidx.test.filters.SdkSuppress;
@@ -30,6 +32,7 @@ import androidx.test.uiautomator.BySelector;
 import androidx.test.uiautomator.Direction;
 import androidx.test.uiautomator.UiDevice;
 import androidx.test.uiautomator.UiObject2;
+import androidx.test.uiautomator.UiSelector;
 import androidx.test.uiautomator.Until;
 
 import org.json.JSONArray;
@@ -42,7 +45,10 @@ import java.io.DataInputStream;
 import java.io.DataOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
 import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
 import java.util.regex.Pattern;
 
 /**
@@ -221,21 +227,25 @@ public class InstrumentedTest {
       wait(device, params).swipe(parseDirection(params), params.getInt("percent"));
   }
 
+  private static JSONObject serializeRect(Rect rect) throws JSONException {
+    JSONObject rectObject = new JSONObject();
+    rectObject.put("x",  rect.left);
+    rectObject.put("y",  rect.top);
+    rectObject.put("width",  rect.width());
+    rectObject.put("height",  rect.height());
+    return rectObject;
+  }
+
   private static JSONObject info(UiDevice device, JSONObject params) throws JSONException {
-    JSONObject info = new JSONObject();
     UiObject2 object = device.findObject(parseSelector(params));
-    Rect bounds = object.getVisibleBounds();
-    JSONObject boundsObject = new JSONObject();
-    boundsObject.put("x",  bounds.left);
-    boundsObject.put("y",  bounds.top);
-    boundsObject.put("width",  bounds.width());
-    boundsObject.put("height",  bounds.height());
+
+    JSONObject info = new JSONObject();
     info.put("clazz", object.getClassName());
     info.put("pkg", object.getApplicationPackage());
     info.put("desc", object.getContentDescription());
     info.put("res",  object.getResourceName());
     info.put("text", object.getText());
-    info.put("bounds", boundsObject);
+    info.put("bounds", serializeRect(object.getVisibleBounds()));
     info.put("checkable", object.isCheckable());
     info.put("checked", object.isChecked());
     info.put("clickable", object.isClickable());
@@ -248,6 +258,26 @@ public class InstrumentedTest {
     return info;
   }
 
+  private static JSONObject info(AccessibilityNodeInfo node) throws JSONException {
+    JSONObject info = new JSONObject();
+    Rect bounds = new Rect();
+    node.getBoundsInScreen(bounds);
+    info.put("desc", node.getContentDescription());
+    info.put("res",  node.getViewIdResourceName());
+    info.put("text", node.getText());
+    info.put("bounds", serializeRect(bounds));
+    info.put("checkable", node.isCheckable());
+    info.put("checked", node.isChecked());
+    info.put("clickable", node.isClickable());
+    info.put("enabled", node.isEnabled());
+    info.put("focusable", node.isFocusable());
+    info.put("focused", node.isFocused());
+    info.put("longClickable", node.isLongClickable());
+    info.put("scrollable", node.isScrollable());
+    info.put("selected", node.isSelected());
+    return info;
+  }
+
   private static void inputPress(UiDevice device, JSONObject params) throws JSONException {
     device.pressKeyCode(params.getInt("keyCode"));
   }
@@ -273,6 +303,35 @@ public class InstrumentedTest {
     device.drag(from.x, from.y, to.x, to.y, params.getInt("steps"));
   }
 
+  private static JSONObject tree(UiDevice device) throws JSONException {
+    return serializeA11yNode(getRootA11yNode(device));
+  }
+
+  private static AccessibilityNodeInfo getRootA11yNode(UiDevice device) {
+    try {
+      Method getQueryController = UiDevice.class.getDeclaredMethod("getQueryController");
+      getQueryController.setAccessible(true);
+      Object queryController = getQueryController.invoke(device);
+
+      Method getRootNode = queryController.getClass().getDeclaredMethod("getRootNode");
+      getRootNode.setAccessible(true);
+      return (AccessibilityNodeInfo) getRootNode.invoke(queryController);
+    } catch (IllegalAccessException | InvocationTargetException | NoSuchMethodException e) {
+      return null;
+    }
+  }
+
+  private static JSONObject serializeA11yNode(AccessibilityNodeInfo node) throws JSONException {
+    JSONObject object = info(node);
+    if (node.getChildCount() == 0)
+      return  object;
+    JSONArray children = new JSONArray();
+    object.put("children", children);
+    for (int i = 0; i < node.getChildCount(); ++i)
+      children.put(serializeA11yNode(node.getChild(i)));
+    return object;
+  }
+
   @Test
   public void main() {
     UiDevice device = UiDevice.getInstance(InstrumentationRegistry.getInstrumentation());
@@ -352,6 +411,9 @@ public class InstrumentedTest {
             case "inputDrag":
               inputDrag(device, params);
               break;
+            case "tree":
+              response.put("result", tree(device));
+              break;
             default:
 
           }