Added an interface between Sysui and system_server
This interface is used to interact between system UI and system
server for winodow magnification. When magnification mode is window
mode, system UI will set the connection to AccessibilityManagerService
to manipulate window magnification.
Bug: 146400227
Test: WindowMagnificationConnectionWrapperTest
Test: AccessibilityManagerTest
Test: WindowMagnificationManagerTest
Change-Id: I64b22eac3a7be2e1dbced0573988fe75ace921f6
diff --git a/core/java/android/view/accessibility/AccessibilityManager.java b/core/java/android/view/accessibility/AccessibilityManager.java
index 2e5a4b5..5e65246 100644
--- a/core/java/android/view/accessibility/AccessibilityManager.java
+++ b/core/java/android/view/accessibility/AccessibilityManager.java
@@ -1416,6 +1416,29 @@
return null;
}
+ /**
+ *
+ * Sets an {@link IWindowMagnificationConnection} that manipulates window magnification.
+ *
+ * @param connection The connection that manipulates window magnification.
+ * @hide
+ */
+ public void setWindowMagnificationConnection(@Nullable
+ IWindowMagnificationConnection connection) {
+ final IAccessibilityManager service;
+ synchronized (mLock) {
+ service = getServiceLocked();
+ if (service == null) {
+ return;
+ }
+ }
+ try {
+ service.setWindowMagnificationConnection(connection);
+ } catch (RemoteException re) {
+ Log.e(LOG_TAG, "Error setting window magnfication connection", re);
+ }
+ }
+
private IAccessibilityManager getServiceLocked() {
if (mService == null) {
tryConnectToServiceLocked(null);
diff --git a/core/java/android/view/accessibility/IAccessibilityManager.aidl b/core/java/android/view/accessibility/IAccessibilityManager.aidl
index 392db57..28b4253 100644
--- a/core/java/android/view/accessibility/IAccessibilityManager.aidl
+++ b/core/java/android/view/accessibility/IAccessibilityManager.aidl
@@ -25,6 +25,7 @@
import android.view.accessibility.AccessibilityNodeInfo;
import android.view.accessibility.IAccessibilityInteractionConnection;
import android.view.accessibility.IAccessibilityManagerClient;
+import android.view.accessibility.IWindowMagnificationConnection;
import android.view.IWindow;
/**
@@ -86,4 +87,5 @@
oneway void registerSystemAction(in RemoteAction action, int actionId);
oneway void unregisterSystemAction(int actionId);
+ oneway void setWindowMagnificationConnection(in IWindowMagnificationConnection connection);
}
diff --git a/core/java/android/view/accessibility/IWindowMagnificationConnection.aidl b/core/java/android/view/accessibility/IWindowMagnificationConnection.aidl
new file mode 100644
index 0000000..0b45c6b
--- /dev/null
+++ b/core/java/android/view/accessibility/IWindowMagnificationConnection.aidl
@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * 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.
+ */
+
+package android.view.accessibility;
+
+import android.graphics.PointF;
+import android.graphics.Rect;
+import android.view.accessibility.IWindowMagnificationConnectionCallback;
+
+/**
+ * Interface for interaction between {@link AccessibilityManagerService}
+ * and {@link WindowMagnification} in SystemUI.
+ *
+ * @hide
+ */
+oneway interface IWindowMagnificationConnection {
+
+ /**
+ * Enables window magnification on specifed display with specified center and scale.
+ *
+ * @param displayId The logical display id.
+ * @param scale magnification scale.
+ * @param centerX the screen-relative X coordinate around which to center,
+ * or {@link Float#NaN} to leave unchanged.
+ * @param centerY the screen-relative Y coordinate around which to center,
+ * or {@link Float#NaN} to leave unchanged.
+ */
+ void enableWindowMagnification(int displayId, float scale, float centerX, float centerY);
+
+ /**
+ * Sets the scale of the window magnifier on specifed display.
+ *
+ * @param displayId The logical display id.
+ * @param scale magnification scale.
+ */
+ void setScale(int displayId, float scale);
+
+ /**
+ * Disables window magnification on specifed display.
+ *
+ * @param displayId The logical display id.
+ */
+ void disableWindowMagnification(int displayId);
+
+ /**
+ * Moves the window magnifier on the specifed display.
+ *
+ * @param offsetX the amount in pixels to offset the window magnifier in the X direction, in
+ * current screen pixels.
+ * @param offsetY the amount in pixels to offset the window magnifier in the Y direction, in
+ * current screen pixels.
+ */
+ void moveWindowMagnifier(int displayId, float offsetX, float offsetY);
+
+ /**
+ * Sets {@link IWindowMagnificationConnectionCallback} to receive the request or the callback.
+ *
+ *
+ * @param callback the interface to be called.
+ */
+ void setConnectionCallback(in IWindowMagnificationConnectionCallback callback);
+}
diff --git a/core/java/android/view/accessibility/IWindowMagnificationConnectionCallback.aidl b/core/java/android/view/accessibility/IWindowMagnificationConnectionCallback.aidl
new file mode 100644
index 0000000..7327bb5
--- /dev/null
+++ b/core/java/android/view/accessibility/IWindowMagnificationConnectionCallback.aidl
@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * 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.
+ */
+
+package android.view.accessibility;
+
+import android.graphics.Rect;
+
+/**
+ * interface to notify the change of the window magnifier bounds and request to change
+ * the magnification mode.
+ *
+ * @hide
+ */
+ oneway interface IWindowMagnificationConnectionCallback {
+
+ /**
+ * Called when the bounds of the window magnifier is changed.
+ *
+ * @param displayId The logical display id.
+ * @param bounds The window magnifier bounds in screen coordinates.
+ */
+ void onWindowMagnifierBoundsChanged(int display, in Rect bounds);
+ /**
+ * Changes the magnification mode on specified display. It is invoked by System UI when the
+ * switch button is toggled.
+ *
+ * @param displayId The logical display id.
+ * @param magnificationMode new magnification mode.
+ */
+ void onChangeMagnificationMode(int display, int magnificationMode);
+}
diff --git a/core/tests/coretests/src/android/view/accessibility/AccessibilityManagerTest.java b/core/tests/coretests/src/android/view/accessibility/AccessibilityManagerTest.java
index e23c51e..8e24907 100644
--- a/core/tests/coretests/src/android/view/accessibility/AccessibilityManagerTest.java
+++ b/core/tests/coretests/src/android/view/accessibility/AccessibilityManagerTest.java
@@ -46,6 +46,7 @@
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
+import org.mockito.Mockito;
import org.mockito.MockitoAnnotations;
import java.util.ArrayList;
@@ -193,4 +194,15 @@
}
});
}
+
+ @Test
+ public void testSetWindowMagnificationConnection() throws Exception {
+ AccessibilityManager manager = createManager(WITH_A11Y_ENABLED);
+ IWindowMagnificationConnection connection = Mockito.mock(
+ IWindowMagnificationConnection.class);
+
+ manager.setWindowMagnificationConnection(connection);
+
+ verify(mMockService).setWindowMagnificationConnection(connection);
+ }
}
diff --git a/services/accessibility/java/com/android/server/accessibility/AccessibilityManagerService.java b/services/accessibility/java/com/android/server/accessibility/AccessibilityManagerService.java
index 58d3489..bbc5d70 100644
--- a/services/accessibility/java/com/android/server/accessibility/AccessibilityManagerService.java
+++ b/services/accessibility/java/com/android/server/accessibility/AccessibilityManagerService.java
@@ -94,6 +94,7 @@
import android.view.accessibility.IAccessibilityInteractionConnection;
import android.view.accessibility.IAccessibilityManager;
import android.view.accessibility.IAccessibilityManagerClient;
+import android.view.accessibility.IWindowMagnificationConnection;
import com.android.internal.R;
import com.android.internal.accessibility.AccessibilityShortcutController;
@@ -106,6 +107,7 @@
import com.android.internal.util.IntPair;
import com.android.server.LocalServices;
import com.android.server.SystemService;
+import com.android.server.accessibility.magnification.WindowMagnificationManager;
import com.android.server.wm.ActivityTaskManagerInternal;
import com.android.server.wm.WindowManagerInternal;
@@ -204,6 +206,8 @@
private AccessibilityInputFilter mInputFilter;
+ private WindowMagnificationManager mWindowMagnificationMgr;
+
private boolean mHasInputFilter;
private KeyEventDispatcher mKeyEventDispatcher;
@@ -875,11 +879,8 @@
*/
@Override
public void notifyAccessibilityButtonVisibilityChanged(boolean shown) {
- if (mContext.checkCallingOrSelfPermission(android.Manifest.permission.STATUS_BAR_SERVICE)
- != PackageManager.PERMISSION_GRANTED) {
- throw new SecurityException("Caller does not hold permission "
- + android.Manifest.permission.STATUS_BAR_SERVICE);
- }
+ mSecurityPolicy.enforceCallingOrSelfPermission(
+ android.Manifest.permission.STATUS_BAR_SERVICE);
synchronized (mLock) {
notifyAccessibilityButtonVisibilityChangedLocked(shown);
}
@@ -2559,6 +2560,24 @@
}
@Override
+ public void setWindowMagnificationConnection(
+ IWindowMagnificationConnection connection) throws RemoteException {
+ mSecurityPolicy.enforceCallingOrSelfPermission(
+ android.Manifest.permission.STATUS_BAR_SERVICE);
+
+ getWindowMagnificationMgr().setConnection(connection);
+ }
+
+ WindowMagnificationManager getWindowMagnificationMgr() {
+ synchronized (mLock) {
+ if (mWindowMagnificationMgr == null) {
+ mWindowMagnificationMgr = new WindowMagnificationManager();
+ }
+ return mWindowMagnificationMgr;
+ }
+ }
+
+ @Override
public void dump(FileDescriptor fd, final PrintWriter pw, String[] args) {
if (!DumpUtils.checkDumpPermission(mContext, LOG_TAG, pw)) return;
synchronized (mLock) {
diff --git a/services/accessibility/java/com/android/server/accessibility/AccessibilitySecurityPolicy.java b/services/accessibility/java/com/android/server/accessibility/AccessibilitySecurityPolicy.java
index 2032109..f06913c 100644
--- a/services/accessibility/java/com/android/server/accessibility/AccessibilitySecurityPolicy.java
+++ b/services/accessibility/java/com/android/server/accessibility/AccessibilitySecurityPolicy.java
@@ -536,4 +536,17 @@
Binder.restoreCallingIdentity(identityToken);
}
}
+
+ /**
+ * Enforcing permission check to IPC caller or grant it if it's not through IPC.
+ *
+ * @param permission The permission to check
+ */
+ public void enforceCallingOrSelfPermission(@NonNull String permission) {
+ if (mContext.checkCallingOrSelfPermission(permission)
+ != PackageManager.PERMISSION_GRANTED) {
+ throw new SecurityException("Caller does not hold permission "
+ + permission);
+ }
+ }
}
diff --git a/services/accessibility/java/com/android/server/accessibility/magnification/WindowMagnificationConnectionWrapper.java b/services/accessibility/java/com/android/server/accessibility/magnification/WindowMagnificationConnectionWrapper.java
new file mode 100644
index 0000000..351c9e0
--- /dev/null
+++ b/services/accessibility/java/com/android/server/accessibility/magnification/WindowMagnificationConnectionWrapper.java
@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * 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.
+ */
+
+package com.android.server.accessibility.magnification;
+
+import static android.os.IBinder.DeathRecipient;
+
+import android.annotation.NonNull;
+import android.os.RemoteException;
+import android.util.Slog;
+import android.view.accessibility.IWindowMagnificationConnection;
+import android.view.accessibility.IWindowMagnificationConnectionCallback;
+
+/**
+ * A wrapper of {@link IWindowMagnificationConnection}.
+ */
+class WindowMagnificationConnectionWrapper {
+
+ private static final boolean DBG = false;
+ private static final String TAG = "WindowMagnificationConnectionWrapper";
+
+ private final @NonNull IWindowMagnificationConnection mConnection;
+
+ WindowMagnificationConnectionWrapper(@NonNull IWindowMagnificationConnection connection) {
+ mConnection = connection;
+ }
+
+ //Should not use this instance anymore after calling it.
+ void unlinkToDeath(@NonNull DeathRecipient deathRecipient) {
+ mConnection.asBinder().unlinkToDeath(deathRecipient, 0);
+ }
+
+ void linkToDeath(@NonNull DeathRecipient deathRecipient) throws RemoteException {
+ mConnection.asBinder().linkToDeath(deathRecipient, 0);
+ }
+
+ boolean enableWindowMagnification(int displayId, float scale, float centerX, float centerY) {
+ try {
+ mConnection.enableWindowMagnification(displayId, scale, centerX, centerY);
+ } catch (RemoteException e) {
+ if (DBG) {
+ Slog.e(TAG, "Error calling enableWindowMagnification()");
+ }
+ return false;
+ }
+ return true;
+ }
+
+ boolean setScale(int displayId, float scale) {
+ try {
+ mConnection.setScale(displayId, scale);
+ } catch (RemoteException e) {
+ if (DBG) {
+ Slog.e(TAG, "Error calling setScale()");
+ }
+ return false;
+ }
+ return true;
+ }
+
+ boolean disableWindowMagnification(int displayId) {
+ try {
+ mConnection.disableWindowMagnification(displayId);
+ } catch (RemoteException e) {
+ if (DBG) {
+ Slog.e(TAG, "Error calling disableWindowMagnification()");
+ }
+ return false;
+ }
+ return true;
+ }
+
+ boolean moveWindowMagnifier(int displayId, float offsetX, float offsetY) {
+ try {
+ mConnection.moveWindowMagnifier(displayId, offsetX, offsetY);
+ } catch (RemoteException e) {
+ if (DBG) {
+ Slog.e(TAG, "Error calling moveWindowMagnifier()");
+ }
+ return false;
+ }
+ return true;
+ }
+
+ boolean setConnectionCallback(IWindowMagnificationConnectionCallback connectionCallback) {
+ try {
+ mConnection.setConnectionCallback(connectionCallback);
+ } catch (RemoteException e) {
+ if (DBG) {
+ Slog.e(TAG, "Error calling setConnectionCallback()");
+ }
+ return false;
+ }
+ return true;
+ }
+
+}
diff --git a/services/accessibility/java/com/android/server/accessibility/magnification/WindowMagnificationManager.java b/services/accessibility/java/com/android/server/accessibility/magnification/WindowMagnificationManager.java
new file mode 100644
index 0000000..00db329
--- /dev/null
+++ b/services/accessibility/java/com/android/server/accessibility/magnification/WindowMagnificationManager.java
@@ -0,0 +1,98 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * 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.
+ */
+
+package com.android.server.accessibility.magnification;
+
+import android.annotation.Nullable;
+import android.graphics.Rect;
+import android.os.IBinder;
+import android.os.RemoteException;
+import android.util.Slog;
+import android.view.accessibility.IWindowMagnificationConnection;
+import android.view.accessibility.IWindowMagnificationConnectionCallback;
+
+import com.android.internal.annotations.VisibleForTesting;
+
+/**
+ * A class to manipulate window magnification through {@link WindowMagnificationConnectionWrapper}.
+ */
+public final class WindowMagnificationManager {
+
+ private static final String TAG = "WindowMagnificationMgr";
+ private final Object mLock = new Object();
+ @VisibleForTesting
+ @Nullable WindowMagnificationConnectionWrapper mConnectionWrapper;
+ private ConnectionCallback mConnectionCallback;
+
+ /**
+ * Sets {@link IWindowMagnificationConnection}.
+ * @param connection {@link IWindowMagnificationConnection}
+ */
+ public void setConnection(@Nullable IWindowMagnificationConnection connection) {
+ synchronized (mLock) {
+ //Reset connectionWrapper.
+ if (mConnectionWrapper != null) {
+ mConnectionWrapper.setConnectionCallback(null);
+ if (mConnectionCallback != null) {
+ mConnectionCallback.mExpiredDeathRecipient = true;
+ }
+ mConnectionWrapper.unlinkToDeath(mConnectionCallback);
+ mConnectionWrapper = null;
+ }
+ if (connection != null) {
+ mConnectionWrapper = new WindowMagnificationConnectionWrapper(connection);
+ }
+
+ if (mConnectionWrapper != null) {
+ try {
+ mConnectionCallback = new ConnectionCallback();
+ mConnectionWrapper.linkToDeath(mConnectionCallback);
+ mConnectionWrapper.setConnectionCallback(mConnectionCallback);
+ } catch (RemoteException e) {
+ Slog.e(TAG, "setConnection failed", e);
+ mConnectionWrapper = null;
+ }
+ }
+ }
+ }
+
+ private class ConnectionCallback extends IWindowMagnificationConnectionCallback.Stub implements
+ IBinder.DeathRecipient {
+ private boolean mExpiredDeathRecipient = false;
+
+ @Override
+ public void onWindowMagnifierBoundsChanged(int display, Rect frame) throws RemoteException {
+ }
+
+ @Override
+ public void onChangeMagnificationMode(int display, int magnificationMode)
+ throws RemoteException {
+ }
+
+ @Override
+ public void binderDied() {
+ synchronized (mLock) {
+ if (mExpiredDeathRecipient) {
+ Slog.w(TAG, "binderDied DeathRecipient is expired");
+ return;
+ }
+ mConnectionWrapper.unlinkToDeath(this);
+ mConnectionWrapper = null;
+ mConnectionCallback = null;
+ }
+ }
+ }
+}
diff --git a/services/tests/servicestests/src/com/android/server/accessibility/magnification/WindowMagnificationConnectionWrapperTest.java b/services/tests/servicestests/src/com/android/server/accessibility/magnification/WindowMagnificationConnectionWrapperTest.java
new file mode 100644
index 0000000..09466e7
--- /dev/null
+++ b/services/tests/servicestests/src/com/android/server/accessibility/magnification/WindowMagnificationConnectionWrapperTest.java
@@ -0,0 +1,83 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * 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.
+ */
+
+package com.android.server.accessibility.magnification;
+
+
+import static org.mockito.Mockito.verify;
+
+import android.os.RemoteException;
+import android.view.Display;
+import android.view.accessibility.IWindowMagnificationConnection;
+import android.view.accessibility.IWindowMagnificationConnectionCallback;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+
+/**
+ * Tests for WindowMagnificationConnectionWrapper. We don't test {@code
+ * WindowMagnificationConnectionWrapper#linkToDeath(IBinder.DeathRecipient)} since it's tested in
+ * {@link WindowMagnificationManagerTest}.
+ */
+public class WindowMagnificationConnectionWrapperTest {
+
+ private static final int TEST_DISPLAY = Display.DEFAULT_DISPLAY;
+
+ @Mock
+ private IWindowMagnificationConnection mConnection;
+ @Mock
+ private IWindowMagnificationConnectionCallback mCallback;
+ private WindowMagnificationConnectionWrapper mConnectionWrapper;
+
+ @Before
+ public void setUp() {
+ MockitoAnnotations.initMocks(this);
+ mConnectionWrapper = new WindowMagnificationConnectionWrapper(mConnection);
+ }
+
+ @Test
+ public void enableWindowMagnification() throws RemoteException {
+ mConnectionWrapper.enableWindowMagnification(TEST_DISPLAY, 2, 100f, 200f);
+ verify(mConnection).enableWindowMagnification(TEST_DISPLAY, 2, 100f, 200f);
+ }
+
+ @Test
+ public void setScale() throws RemoteException {
+ mConnectionWrapper.setScale(TEST_DISPLAY, 3.0f);
+ verify(mConnection).setScale(TEST_DISPLAY, 3.0f);
+ }
+
+ @Test
+ public void disableWindowMagnification() throws RemoteException {
+ mConnectionWrapper.disableWindowMagnification(TEST_DISPLAY);
+ verify(mConnection).disableWindowMagnification(TEST_DISPLAY);
+ }
+
+ @Test
+ public void moveWindowMagnifier() throws RemoteException {
+ mConnectionWrapper.moveWindowMagnifier(0, 100, 150);
+ verify(mConnection).moveWindowMagnifier(0, 100, 150);
+ }
+
+ @Test
+ public void setMirrorWindowCallback() throws RemoteException {
+ mConnectionWrapper.setConnectionCallback(mCallback);
+ verify(mConnection).setConnectionCallback(mCallback);
+ }
+
+}
diff --git a/services/tests/servicestests/src/com/android/server/accessibility/magnification/WindowMagnificationManagerTest.java b/services/tests/servicestests/src/com/android/server/accessibility/magnification/WindowMagnificationManagerTest.java
new file mode 100644
index 0000000..780a6c0
--- /dev/null
+++ b/services/tests/servicestests/src/com/android/server/accessibility/magnification/WindowMagnificationManagerTest.java
@@ -0,0 +1,142 @@
+/*
+ * Copyright (C) 2019 The Android Open Source Project
+ *
+ * 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.
+ */
+
+package com.android.server.accessibility.magnification;
+
+
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.ArgumentMatchers.eq;
+import static org.mockito.Mockito.doAnswer;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+import static org.testng.Assert.assertNotNull;
+import static org.testng.Assert.assertNull;
+
+import android.os.Binder;
+import android.os.IBinder;
+import android.os.RemoteException;
+import android.view.accessibility.IWindowMagnificationConnection;
+import android.view.accessibility.IWindowMagnificationConnectionCallback;
+
+import org.junit.Before;
+import org.junit.Test;
+
+/**
+ * Tests for WindowMagnificationManager.
+ */
+public class WindowMagnificationManagerTest {
+
+ private MockWindowMagnificationConnection mMockConnection;
+ private WindowMagnificationManager mWindowMagnificationManager;
+
+ @Before
+ public void setUp() {
+ mMockConnection = new MockWindowMagnificationConnection();
+ mWindowMagnificationManager = new WindowMagnificationManager();
+ }
+
+ @Test
+ public void setConnection_connectionIsNull_wrapperIsNullAndLinkToDeath() {
+ mWindowMagnificationManager.setConnection(mMockConnection.getConnection());
+ assertNotNull(mWindowMagnificationManager.mConnectionWrapper);
+ verify(mMockConnection.asBinder()).linkToDeath(any(IBinder.DeathRecipient.class), eq(0));
+ }
+
+ @Test
+ public void setConnection_connectionIsNull_setMirrorWindowCallbackAndHasWrapper()
+ throws RemoteException {
+ mWindowMagnificationManager.setConnection(mMockConnection.getConnection());
+
+ assertNotNull(mWindowMagnificationManager.mConnectionWrapper);
+ verify(mMockConnection.asBinder()).linkToDeath(any(IBinder.DeathRecipient.class), eq(0));
+ verify(mMockConnection.getConnection()).setConnectionCallback(
+ any(IWindowMagnificationConnectionCallback.class));
+ }
+
+ @Test
+ public void binderDied_hasConnection_wrapperIsNullAndUnlinkToDeath() {
+ mWindowMagnificationManager.setConnection(mMockConnection.getConnection());
+
+ mMockConnection.getDeathRecipient().binderDied();
+
+ assertNull(mWindowMagnificationManager.mConnectionWrapper);
+ verify(mMockConnection.asBinder()).unlinkToDeath(mMockConnection.getDeathRecipient(),
+ 0);
+ }
+
+ /**
+ * This test simulates {@link WindowMagnificationManager#setConnection} is called by thread A
+ * and then the former connection is called by thread B. In this situation we should keep the
+ * new connection.
+ */
+ @Test
+ public void
+ setSecondConnectionAndFormerConnectionBinderDead_hasWrapperAndNotCallUnlinkToDeath() {
+ mWindowMagnificationManager.setConnection(mMockConnection.getConnection());
+ MockWindowMagnificationConnection secondConnection =
+ new MockWindowMagnificationConnection();
+
+ mWindowMagnificationManager.setConnection(secondConnection.getConnection());
+ mMockConnection.getDeathRecipient().binderDied();
+
+ assertNotNull(mWindowMagnificationManager.mConnectionWrapper);
+ verify(mMockConnection.asBinder()).unlinkToDeath(mMockConnection.getDeathRecipient(), 0);
+ verify(secondConnection.asBinder(), never()).unlinkToDeath(
+ secondConnection.getDeathRecipient(), 0);
+ }
+
+ @Test
+ public void setNullConnection_hasConnection_wrapperIsNull() throws RemoteException {
+ mWindowMagnificationManager.setConnection(mMockConnection.getConnection());
+
+ mWindowMagnificationManager.setConnection(null);
+
+ assertNull(mWindowMagnificationManager.mConnectionWrapper);
+ verify(mMockConnection.getConnection()).setConnectionCallback(null);
+ }
+
+ private static class MockWindowMagnificationConnection {
+
+ private final IWindowMagnificationConnection mConnection;
+ private final Binder mBinder;
+ private IBinder.DeathRecipient mDeathRecipient;
+
+ MockWindowMagnificationConnection() {
+ mConnection = mock(IWindowMagnificationConnection.class);
+ mBinder = mock(Binder.class);
+ when(mConnection.asBinder()).thenReturn(mBinder);
+ doAnswer((invocation) -> {
+ mDeathRecipient = invocation.getArgument(0);
+ return null;
+ }).when(mBinder).linkToDeath(
+ any(IBinder.DeathRecipient.class), eq(0));
+ }
+
+ IWindowMagnificationConnection getConnection() {
+ return mConnection;
+ }
+
+ public IBinder.DeathRecipient getDeathRecipient() {
+ return mDeathRecipient;
+ }
+
+ Binder asBinder() {
+ return mBinder;
+ }
+ }
+}