Merge "Add Settings UI for MTP transcoding over USB." into sc-dev

src/com/android/settings/connecteddevice/usb/UsbDetailsFragment.java

@@ -92,6 +92,7 @@ public class UsbDetailsFragment extends DashboardFragment {
         ret.add(new UsbDetailsDataRoleController(context, fragment, usbBackend));
         ret.add(new UsbDetailsFunctionsController(context, fragment, usbBackend));
         ret.add(new UsbDetailsPowerRoleController(context, fragment, usbBackend));
+        ret.add(new UsbDetailsTranscodeMtpController(context, fragment, usbBackend));
         return ret;
     }
 

src/com/android/settings/connecteddevice/usb/UsbDetailsTranscodeMtpController.java

@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2021 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.settings.connecteddevice.usb;
+
+import static android.hardware.usb.UsbPortStatus.DATA_ROLE_DEVICE;
+
+import android.content.Context;
+import android.hardware.usb.UsbManager;
+import android.os.SystemProperties;
+
+import androidx.preference.Preference;
+import androidx.preference.PreferenceCategory;
+import androidx.preference.PreferenceScreen;
+import androidx.preference.SwitchPreference;
+
+import com.android.settings.R;
+import com.android.settings.Utils;
+
+/**
+ * This class controls the switch for setting if we should transcode files transferred via MTP over
+ * USB.
+ */
+public class UsbDetailsTranscodeMtpController extends UsbDetailsController
+        implements Preference.OnPreferenceClickListener {
+    private static final String TRANSCODE_MTP_SYS_PROP_KEY = "sys.fuse.transcode_mtp";
+    private static final String PREFERENCE_KEY = "usb_transcode_mtp";
+
+    private PreferenceCategory mPreferenceCategory;
+    private SwitchPreference mSwitchPreference;
+
+    public UsbDetailsTranscodeMtpController(Context context, UsbDetailsFragment fragment,
+            UsbBackend backend) {
+        super(context, fragment, backend);
+    }
+
+
+    @Override
+    public void displayPreference(PreferenceScreen screen) {
+        super.displayPreference(screen);
+        mPreferenceCategory = screen.findPreference(getPreferenceKey());
+        mSwitchPreference = new SwitchPreference(mPreferenceCategory.getContext());
+        mSwitchPreference.setTitle(R.string.usb_transcode_files);
+        mSwitchPreference.setOnPreferenceClickListener(this);
+        mPreferenceCategory.addPreference(mSwitchPreference);
+    }
+
+    @Override
+    protected void refresh(boolean connected, long functions, int powerRole, int dataRole) {
+        if (mUsbBackend.areFunctionsSupported(UsbManager.FUNCTION_MTP | UsbManager.FUNCTION_PTP)) {
+            mFragment.getPreferenceScreen().addPreference(mPreferenceCategory);
+        } else {
+            mFragment.getPreferenceScreen().removePreference(mPreferenceCategory);
+        }
+
+        mSwitchPreference.setChecked(SystemProperties.getBoolean(TRANSCODE_MTP_SYS_PROP_KEY, true));
+        mPreferenceCategory.setEnabled(
+                connected && isDeviceInFileTransferMode(functions, dataRole));
+    }
+
+    @Override
+    public boolean onPreferenceClick(Preference preference) {
+        SystemProperties.set(TRANSCODE_MTP_SYS_PROP_KEY,
+                Boolean.toString(mSwitchPreference.isChecked()));
+        return true;
+    }
+
+    @Override
+    public boolean isAvailable() {
+        return !Utils.isMonkeyRunning();
+    }
+
+    @Override
+    public String getPreferenceKey() {
+        return PREFERENCE_KEY;
+    }
+
+    private static boolean isDeviceInFileTransferMode(long functions, int dataRole) {
+        return dataRole == DATA_ROLE_DEVICE && ((functions & UsbManager.FUNCTION_MTP) != 0
+                || (functions & UsbManager.FUNCTION_PTP) != 0);
+    }
+}