1/*
2 * Copyright (C) 2014 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.statusbar.phone;
18
19import android.app.ActivityManager;
20import android.content.Context;
21import android.os.Handler;
22import android.os.UserHandle;
23import android.os.UserManager;
24import android.util.Slog;
25import android.view.KeyEvent;
26import android.view.LayoutInflater;
27import android.view.View;
28import android.view.ViewGroup;
29import android.view.ViewTreeObserver;
30import android.view.accessibility.AccessibilityEvent;
31
32import com.android.internal.widget.LockPatternUtils;
33import com.android.keyguard.KeyguardHostView;
34import com.android.keyguard.KeyguardSecurityView;
35import com.android.keyguard.KeyguardUpdateMonitor;
36import com.android.keyguard.KeyguardUpdateMonitorCallback;
37import com.android.keyguard.R;
38import com.android.keyguard.ViewMediatorCallback;
39import com.android.systemui.DejankUtils;
40import com.android.systemui.classifier.FalsingManager;
41import com.android.systemui.keyguard.DismissCallbackRegistry;
42
43import static com.android.keyguard.KeyguardHostView.OnDismissAction;
44import static com.android.keyguard.KeyguardSecurityModel.SecurityMode;
45
46/**
47 * A class which manages the bouncer on the lockscreen.
48 */
49public class KeyguardBouncer {
50
51    final static private String TAG = "KeyguardBouncer";
52
53    protected final Context mContext;
54    protected final ViewMediatorCallback mCallback;
55    protected final LockPatternUtils mLockPatternUtils;
56    protected final ViewGroup mContainer;
57    private final FalsingManager mFalsingManager;
58    private final DismissCallbackRegistry mDismissCallbackRegistry;
59    private final Handler mHandler;
60    protected KeyguardHostView mKeyguardView;
61    protected ViewGroup mRoot;
62    private boolean mShowingSoon;
63    private int mBouncerPromptReason;
64    private final KeyguardUpdateMonitorCallback mUpdateMonitorCallback =
65            new KeyguardUpdateMonitorCallback() {
66                @Override
67                public void onStrongAuthStateChanged(int userId) {
68                    mBouncerPromptReason = mCallback.getBouncerPromptReason();
69                }
70            };
71    private final Runnable mRemoveViewRunnable = this::removeView;
72
73    public KeyguardBouncer(Context context, ViewMediatorCallback callback,
74            LockPatternUtils lockPatternUtils, ViewGroup container,
75            DismissCallbackRegistry dismissCallbackRegistry) {
76        mContext = context;
77        mCallback = callback;
78        mLockPatternUtils = lockPatternUtils;
79        mContainer = container;
80        KeyguardUpdateMonitor.getInstance(mContext).registerCallback(mUpdateMonitorCallback);
81        mFalsingManager = FalsingManager.getInstance(mContext);
82        mDismissCallbackRegistry = dismissCallbackRegistry;
83        mHandler = new Handler();
84    }
85
86    public void show(boolean resetSecuritySelection) {
87        final int keyguardUserId = KeyguardUpdateMonitor.getCurrentUser();
88        if (keyguardUserId == UserHandle.USER_SYSTEM && UserManager.isSplitSystemUser()) {
89            // In split system user mode, we never unlock system user.
90            return;
91        }
92        mFalsingManager.onBouncerShown();
93        ensureView();
94        if (resetSecuritySelection) {
95            // showPrimarySecurityScreen() updates the current security method. This is needed in
96            // case we are already showing and the current security method changed.
97            mKeyguardView.showPrimarySecurityScreen();
98        }
99        if (mRoot.getVisibility() == View.VISIBLE || mShowingSoon) {
100            return;
101        }
102
103        final int activeUserId = ActivityManager.getCurrentUser();
104        final boolean isSystemUser =
105                UserManager.isSplitSystemUser() && activeUserId == UserHandle.USER_SYSTEM;
106        final boolean allowDismissKeyguard = !isSystemUser && activeUserId == keyguardUserId;
107
108        // If allowed, try to dismiss the Keyguard. If no security auth (password/pin/pattern) is
109        // set, this will dismiss the whole Keyguard. Otherwise, show the bouncer.
110        if (allowDismissKeyguard && mKeyguardView.dismiss(activeUserId)) {
111            return;
112        }
113
114        // This condition may indicate an error on Android, so log it.
115        if (!allowDismissKeyguard) {
116            Slog.w(TAG, "User can't dismiss keyguard: " + activeUserId + " != " + keyguardUserId);
117        }
118
119        mShowingSoon = true;
120
121        // Split up the work over multiple frames.
122        DejankUtils.postAfterTraversal(mShowRunnable);
123    }
124
125    private final Runnable mShowRunnable = new Runnable() {
126        @Override
127        public void run() {
128            mRoot.setVisibility(View.VISIBLE);
129            mKeyguardView.onResume();
130            showPromptReason(mBouncerPromptReason);
131            if (mKeyguardView.getHeight() != 0) {
132                mKeyguardView.startAppearAnimation();
133            } else {
134                mKeyguardView.getViewTreeObserver().addOnPreDrawListener(
135                        new ViewTreeObserver.OnPreDrawListener() {
136                            @Override
137                            public boolean onPreDraw() {
138                                mKeyguardView.getViewTreeObserver().removeOnPreDrawListener(this);
139                                mKeyguardView.startAppearAnimation();
140                                return true;
141                            }
142                        });
143                mKeyguardView.requestLayout();
144            }
145            mShowingSoon = false;
146            mKeyguardView.sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED);
147        }
148    };
149
150    /**
151     * Show a string explaining why the security view needs to be solved.
152     *
153     * @param reason a flag indicating which string should be shown, see
154     *               {@link KeyguardSecurityView#PROMPT_REASON_NONE}
155     *               and {@link KeyguardSecurityView#PROMPT_REASON_RESTART}
156     */
157    public void showPromptReason(int reason) {
158        mKeyguardView.showPromptReason(reason);
159    }
160
161    public void showMessage(String message, int color) {
162        mKeyguardView.showMessage(message, color);
163    }
164
165    private void cancelShowRunnable() {
166        DejankUtils.removeCallbacks(mShowRunnable);
167        mShowingSoon = false;
168    }
169
170    public void showWithDismissAction(OnDismissAction r, Runnable cancelAction) {
171        ensureView();
172        mKeyguardView.setOnDismissAction(r, cancelAction);
173        show(false /* resetSecuritySelection */);
174    }
175
176    public void hide(boolean destroyView) {
177        if (isShowing()) {
178            mDismissCallbackRegistry.notifyDismissCancelled();
179        }
180        mFalsingManager.onBouncerHidden();
181        cancelShowRunnable();
182        if (mKeyguardView != null) {
183            mKeyguardView.cancelDismissAction();
184            mKeyguardView.cleanUp();
185        }
186        if (mRoot != null) {
187            mRoot.setVisibility(View.INVISIBLE);
188            if (destroyView) {
189
190                // We have a ViewFlipper that unregisters a broadcast when being detached, which may
191                // be slow because of AM lock contention during unlocking. We can delay it a bit.
192                mHandler.postDelayed(mRemoveViewRunnable, 50);
193            }
194        }
195    }
196
197    /**
198     * See {@link StatusBarKeyguardViewManager#startPreHideAnimation}.
199     */
200    public void startPreHideAnimation(Runnable runnable) {
201        if (mKeyguardView != null) {
202            mKeyguardView.startDisappearAnimation(runnable);
203        } else if (runnable != null) {
204            runnable.run();
205        }
206    }
207
208    /**
209     * Reset the state of the view.
210     */
211    public void reset() {
212        cancelShowRunnable();
213        inflateView();
214        mFalsingManager.onBouncerHidden();
215    }
216
217    public void onScreenTurnedOff() {
218        if (mKeyguardView != null && mRoot != null && mRoot.getVisibility() == View.VISIBLE) {
219            mKeyguardView.onPause();
220        }
221    }
222
223    public boolean isShowing() {
224        return mShowingSoon || (mRoot != null && mRoot.getVisibility() == View.VISIBLE);
225    }
226
227    public void prepare() {
228        boolean wasInitialized = mRoot != null;
229        ensureView();
230        if (wasInitialized) {
231            mKeyguardView.showPrimarySecurityScreen();
232        }
233        mBouncerPromptReason = mCallback.getBouncerPromptReason();
234    }
235
236    protected void ensureView() {
237        mHandler.removeCallbacks(mRemoveViewRunnable);
238        if (mRoot == null) {
239            inflateView();
240        }
241    }
242
243    protected void inflateView() {
244        removeView();
245        mHandler.removeCallbacks(mRemoveViewRunnable);
246        mRoot = (ViewGroup) LayoutInflater.from(mContext).inflate(R.layout.keyguard_bouncer, null);
247        mKeyguardView = (KeyguardHostView) mRoot.findViewById(R.id.keyguard_host_view);
248        mKeyguardView.setLockPatternUtils(mLockPatternUtils);
249        mKeyguardView.setViewMediatorCallback(mCallback);
250        mContainer.addView(mRoot, mContainer.getChildCount());
251        mRoot.setVisibility(View.INVISIBLE);
252    }
253
254    protected void removeView() {
255        if (mRoot != null && mRoot.getParent() == mContainer) {
256            mContainer.removeView(mRoot);
257            mRoot = null;
258        }
259    }
260
261    public boolean onBackPressed() {
262        return mKeyguardView != null && mKeyguardView.handleBackKey();
263    }
264
265    /**
266     * @return True if and only if the security method should be shown before showing the
267     * notifications on Keyguard, like SIM PIN/PUK.
268     */
269    public boolean needsFullscreenBouncer() {
270        ensureView();
271        if (mKeyguardView != null) {
272            SecurityMode mode = mKeyguardView.getSecurityMode();
273            return mode == SecurityMode.SimPin || mode == SecurityMode.SimPuk;
274        }
275        return false;
276    }
277
278    /**
279     * Like {@link #needsFullscreenBouncer}, but uses the currently visible security method, which
280     * makes this method much faster.
281     */
282    public boolean isFullscreenBouncer() {
283        if (mKeyguardView != null) {
284            SecurityMode mode = mKeyguardView.getCurrentSecurityMode();
285            return mode == SecurityMode.SimPin || mode == SecurityMode.SimPuk;
286        }
287        return false;
288    }
289
290    /**
291     * WARNING: This method might cause Binder calls.
292     */
293    public boolean isSecure() {
294        return mKeyguardView == null || mKeyguardView.getSecurityMode() != SecurityMode.None;
295    }
296
297    public boolean shouldDismissOnMenuPressed() {
298        return mKeyguardView.shouldEnableMenuKey();
299    }
300
301    public boolean interceptMediaKey(KeyEvent event) {
302        ensureView();
303        return mKeyguardView.interceptMediaKey(event);
304    }
305
306    public void notifyKeyguardAuthenticated(boolean strongAuth) {
307        ensureView();
308        mKeyguardView.finish(strongAuth, KeyguardUpdateMonitor.getCurrentUser());
309    }
310}
311