1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.systemui.usb;
18
19import android.app.AlertDialog;
20import android.app.PendingIntent;
21import android.content.Context;
22import android.content.DialogInterface;
23import android.content.Intent;
24import android.content.pm.ApplicationInfo;
25import android.content.pm.PackageManager;
26import android.hardware.usb.IUsbManager;
27import android.hardware.usb.UsbAccessory;
28import android.hardware.usb.UsbDevice;
29import android.hardware.usb.UsbManager;
30import android.os.Bundle;
31import android.os.IBinder;
32import android.os.RemoteException;
33import android.os.ServiceManager;
34import android.os.UserHandle;
35import android.util.Log;
36import android.view.LayoutInflater;
37import android.view.View;
38import android.widget.CheckBox;
39import android.widget.CompoundButton;
40import android.widget.TextView;
41
42import com.android.internal.app.AlertActivity;
43import com.android.internal.app.AlertController;
44import com.android.systemui.R;
45
46public class UsbPermissionActivity extends AlertActivity
47        implements DialogInterface.OnClickListener, CheckBox.OnCheckedChangeListener {
48
49    private static final String TAG = "UsbPermissionActivity";
50
51    private CheckBox mAlwaysUse;
52    private TextView mClearDefaultHint;
53    private UsbDevice mDevice;
54    private UsbAccessory mAccessory;
55    private PendingIntent mPendingIntent;
56    private String mPackageName;
57    private int mUid;
58    private boolean mPermissionGranted;
59    private UsbDisconnectedReceiver mDisconnectedReceiver;
60
61    @Override
62    public void onCreate(Bundle icicle) {
63        super.onCreate(icicle);
64
65       Intent intent = getIntent();
66        mDevice = (UsbDevice)intent.getParcelableExtra(UsbManager.EXTRA_DEVICE);
67        mAccessory = (UsbAccessory)intent.getParcelableExtra(UsbManager.EXTRA_ACCESSORY);
68        mPendingIntent = (PendingIntent)intent.getParcelableExtra(Intent.EXTRA_INTENT);
69        mUid = intent.getIntExtra(Intent.EXTRA_UID, -1);
70        mPackageName = intent.getStringExtra("package");
71
72        PackageManager packageManager = getPackageManager();
73        ApplicationInfo aInfo;
74        try {
75            aInfo = packageManager.getApplicationInfo(mPackageName, 0);
76        } catch (PackageManager.NameNotFoundException e) {
77            Log.e(TAG, "unable to look up package name", e);
78            finish();
79            return;
80        }
81        String appName = aInfo.loadLabel(packageManager).toString();
82
83        final AlertController.AlertParams ap = mAlertParams;
84        ap.mIcon = aInfo.loadIcon(packageManager);
85        ap.mTitle = appName;
86        if (mDevice == null) {
87            ap.mMessage = getString(R.string.usb_accessory_permission_prompt, appName);
88            mDisconnectedReceiver = new UsbDisconnectedReceiver(this, mAccessory);
89        } else {
90            ap.mMessage = getString(R.string.usb_device_permission_prompt, appName);
91            mDisconnectedReceiver = new UsbDisconnectedReceiver(this, mDevice);
92        }
93        ap.mPositiveButtonText = getString(android.R.string.ok);
94        ap.mNegativeButtonText = getString(android.R.string.cancel);
95        ap.mPositiveButtonListener = this;
96        ap.mNegativeButtonListener = this;
97
98        // add "always use" checkbox
99        LayoutInflater inflater = (LayoutInflater)getSystemService(
100                Context.LAYOUT_INFLATER_SERVICE);
101        ap.mView = inflater.inflate(com.android.internal.R.layout.always_use_checkbox, null);
102        mAlwaysUse = (CheckBox)ap.mView.findViewById(com.android.internal.R.id.alwaysUse);
103        if (mDevice == null) {
104            mAlwaysUse.setText(R.string.always_use_accessory);
105        } else {
106            mAlwaysUse.setText(R.string.always_use_device);
107        }
108        mAlwaysUse.setOnCheckedChangeListener(this);
109        mClearDefaultHint = (TextView)ap.mView.findViewById(
110                                                    com.android.internal.R.id.clearDefaultHint);
111        mClearDefaultHint.setVisibility(View.GONE);
112
113        setupAlert();
114
115    }
116
117    @Override
118    public void onDestroy() {
119        IBinder b = ServiceManager.getService(USB_SERVICE);
120        IUsbManager service = IUsbManager.Stub.asInterface(b);
121
122        // send response via pending intent
123        Intent intent = new Intent();
124        try {
125            if (mDevice != null) {
126                intent.putExtra(UsbManager.EXTRA_DEVICE, mDevice);
127                if (mPermissionGranted) {
128                    service.grantDevicePermission(mDevice, mUid);
129                    if (mAlwaysUse.isChecked()) {
130                        final int userId = UserHandle.getUserId(mUid);
131                        service.setDevicePackage(mDevice, mPackageName, userId);
132                    }
133                }
134            }
135            if (mAccessory != null) {
136                intent.putExtra(UsbManager.EXTRA_ACCESSORY, mAccessory);
137                if (mPermissionGranted) {
138                    service.grantAccessoryPermission(mAccessory, mUid);
139                    if (mAlwaysUse.isChecked()) {
140                        final int userId = UserHandle.getUserId(mUid);
141                        service.setAccessoryPackage(mAccessory, mPackageName, userId);
142                    }
143                }
144            }
145            intent.putExtra(UsbManager.EXTRA_PERMISSION_GRANTED, mPermissionGranted);
146            mPendingIntent.send(this, 0, intent);
147        } catch (PendingIntent.CanceledException e) {
148            Log.w(TAG, "PendingIntent was cancelled");
149        } catch (RemoteException e) {
150            Log.e(TAG, "IUsbService connection failed", e);
151        }
152
153        if (mDisconnectedReceiver != null) {
154            unregisterReceiver(mDisconnectedReceiver);
155        }
156        super.onDestroy();
157    }
158
159    public void onClick(DialogInterface dialog, int which) {
160        if (which == AlertDialog.BUTTON_POSITIVE) {
161            mPermissionGranted = true;
162        }
163        finish();
164    }
165
166    public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
167        if (mClearDefaultHint == null) return;
168
169        if(isChecked) {
170            mClearDefaultHint.setVisibility(View.VISIBLE);
171        } else {
172            mClearDefaultHint.setVisibility(View.GONE);
173        }
174    }
175}
176