1/*
2 * Copyright (C) 2013 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.internal.policy.impl;
18
19import android.animation.ArgbEvaluator;
20import android.animation.ValueAnimator;
21import android.app.ActivityManager;
22import android.app.ActivityManagerNative;
23import android.content.BroadcastReceiver;
24import android.content.Context;
25import android.content.Intent;
26import android.content.IntentFilter;
27import android.graphics.PixelFormat;
28import android.graphics.drawable.ColorDrawable;
29import android.os.Handler;
30import android.os.Message;
31import android.os.RemoteException;
32import android.os.UserHandle;
33import android.provider.Settings;
34import android.util.DisplayMetrics;
35import android.util.Slog;
36import android.util.SparseBooleanArray;
37import android.view.Gravity;
38import android.view.MotionEvent;
39import android.view.View;
40import android.view.ViewGroup;
41import android.view.WindowManager;
42import android.view.animation.Animation;
43import android.view.animation.AnimationUtils;
44import android.view.animation.DecelerateInterpolator;
45import android.widget.Button;
46import android.widget.FrameLayout;
47
48import com.android.internal.R;
49
50/**
51 *  Helper to manage showing/hiding a confirmation prompt when the navigation bar is hidden
52 *  entering immersive mode.
53 */
54public class ImmersiveModeConfirmation {
55    private static final String TAG = "ImmersiveModeConfirmation";
56    private static final boolean DEBUG = false;
57    private static final boolean DEBUG_SHOW_EVERY_TIME = false; // super annoying, use with caution
58    private static final String CONFIRMED = "confirmed";
59
60    private final Context mContext;
61    private final H mHandler;
62    private final long mShowDelayMs;
63    private final long mPanicThresholdMs;
64    private final SparseBooleanArray mUserPanicResets = new SparseBooleanArray();
65
66    private boolean mConfirmed;
67    private ClingWindowView mClingWindow;
68    private long mPanicTime;
69    private WindowManager mWindowManager;
70    private int mCurrentUserId;
71
72    public ImmersiveModeConfirmation(Context context) {
73        mContext = context;
74        mHandler = new H();
75        mShowDelayMs = getNavBarExitDuration() * 3;
76        mPanicThresholdMs = context.getResources()
77                .getInteger(R.integer.config_immersive_mode_confirmation_panic);
78        mWindowManager = (WindowManager)
79                mContext.getSystemService(Context.WINDOW_SERVICE);
80    }
81
82    private long getNavBarExitDuration() {
83        Animation exit = AnimationUtils.loadAnimation(mContext, R.anim.dock_bottom_exit);
84        return exit != null ? exit.getDuration() : 0;
85    }
86
87    public void loadSetting(int currentUserId) {
88        mConfirmed = false;
89        mCurrentUserId = currentUserId;
90        if (DEBUG) Slog.d(TAG, String.format("loadSetting() mCurrentUserId=%d resetForPanic=%s",
91                mCurrentUserId, mUserPanicResets.get(mCurrentUserId, false)));
92        String value = null;
93        try {
94            value = Settings.Secure.getStringForUser(mContext.getContentResolver(),
95                    Settings.Secure.IMMERSIVE_MODE_CONFIRMATIONS,
96                    UserHandle.USER_CURRENT);
97            mConfirmed = CONFIRMED.equals(value);
98            if (DEBUG) Slog.d(TAG, "Loaded mConfirmed=" + mConfirmed);
99        } catch (Throwable t) {
100            Slog.w(TAG, "Error loading confirmations, value=" + value, t);
101        }
102    }
103
104    private void saveSetting() {
105        if (DEBUG) Slog.d(TAG, "saveSetting()");
106        try {
107            final String value = mConfirmed ? CONFIRMED : null;
108            Settings.Secure.putStringForUser(mContext.getContentResolver(),
109                    Settings.Secure.IMMERSIVE_MODE_CONFIRMATIONS,
110                    value,
111                    UserHandle.USER_CURRENT);
112            if (DEBUG) Slog.d(TAG, "Saved value=" + value);
113        } catch (Throwable t) {
114            Slog.w(TAG, "Error saving confirmations, mConfirmed=" + mConfirmed, t);
115        }
116    }
117
118    public void immersiveModeChanged(String pkg, boolean isImmersiveMode,
119            boolean userSetupComplete) {
120        mHandler.removeMessages(H.SHOW);
121        if (isImmersiveMode) {
122            final boolean disabled = PolicyControl.disableImmersiveConfirmation(pkg);
123            if (DEBUG) Slog.d(TAG, String.format("immersiveModeChanged() disabled=%s mConfirmed=%s",
124                    disabled, mConfirmed));
125            if (!disabled && (DEBUG_SHOW_EVERY_TIME || !mConfirmed) && userSetupComplete) {
126                mHandler.sendEmptyMessageDelayed(H.SHOW, mShowDelayMs);
127            }
128        } else {
129            mHandler.sendEmptyMessage(H.HIDE);
130        }
131    }
132
133    public boolean onPowerKeyDown(boolean isScreenOn, long time, boolean inImmersiveMode) {
134        if (!isScreenOn && (time - mPanicTime < mPanicThresholdMs)) {
135            // turning the screen back on within the panic threshold
136            mHandler.sendEmptyMessage(H.PANIC);
137            return mClingWindow == null;
138        }
139        if (isScreenOn && inImmersiveMode) {
140            // turning the screen off, remember if we were in immersive mode
141            mPanicTime = time;
142        } else {
143            mPanicTime = 0;
144        }
145        return false;
146    }
147
148    public void confirmCurrentPrompt() {
149        if (mClingWindow != null) {
150            if (DEBUG) Slog.d(TAG, "confirmCurrentPrompt()");
151            mHandler.post(mConfirm);
152        }
153    }
154
155    private void handlePanic() {
156        if (DEBUG) Slog.d(TAG, "handlePanic()");
157        if (mUserPanicResets.get(mCurrentUserId, false)) return;  // already reset for panic
158        mUserPanicResets.put(mCurrentUserId, true);
159        mConfirmed = false;
160        saveSetting();
161    }
162
163    private void handleHide() {
164        if (mClingWindow != null) {
165            if (DEBUG) Slog.d(TAG, "Hiding immersive mode confirmation");
166            mWindowManager.removeView(mClingWindow);
167            mClingWindow = null;
168        }
169    }
170
171    public WindowManager.LayoutParams getClingWindowLayoutParams() {
172        final WindowManager.LayoutParams lp = new WindowManager.LayoutParams(
173                ViewGroup.LayoutParams.MATCH_PARENT,
174                ViewGroup.LayoutParams.MATCH_PARENT,
175                WindowManager.LayoutParams.TYPE_TOAST,
176                0
177                        | WindowManager.LayoutParams.FLAG_LAYOUT_IN_SCREEN
178                        | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE
179                        | WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED
180                ,
181                PixelFormat.TRANSLUCENT);
182        lp.privateFlags |= WindowManager.LayoutParams.PRIVATE_FLAG_SHOW_FOR_ALL_USERS;
183        lp.setTitle("ImmersiveModeConfirmation");
184        lp.windowAnimations = com.android.internal.R.style.Animation_RecentApplications;
185        lp.gravity = Gravity.FILL;
186        return lp;
187    }
188
189    public FrameLayout.LayoutParams getBubbleLayoutParams() {
190        return new FrameLayout.LayoutParams(
191                mContext.getResources().getDimensionPixelSize(
192                        R.dimen.immersive_mode_cling_width),
193                ViewGroup.LayoutParams.WRAP_CONTENT,
194                Gravity.CENTER_HORIZONTAL | Gravity.TOP);
195    }
196
197    private class ClingWindowView extends FrameLayout {
198        private static final int BGCOLOR = 0x80000000;
199        private static final int OFFSET_DP = 48;
200
201        private final Runnable mConfirm;
202        private final ColorDrawable mColor = new ColorDrawable(0);
203        private ValueAnimator mColorAnim;
204        private ViewGroup mClingLayout;
205
206        private Runnable mUpdateLayoutRunnable = new Runnable() {
207            @Override
208            public void run() {
209                if (mClingLayout != null && mClingLayout.getParent() != null) {
210                    mClingLayout.setLayoutParams(getBubbleLayoutParams());
211                }
212            }
213        };
214
215        private BroadcastReceiver mReceiver = new BroadcastReceiver() {
216            @Override
217            public void onReceive(Context context, Intent intent) {
218                if (intent.getAction().equals(Intent.ACTION_CONFIGURATION_CHANGED)) {
219                    post(mUpdateLayoutRunnable);
220                }
221            }
222        };
223
224        public ClingWindowView(Context context, Runnable confirm) {
225            super(context);
226            mConfirm = confirm;
227            setClickable(true);
228            setBackground(mColor);
229        }
230
231        @Override
232        public void onAttachedToWindow() {
233            super.onAttachedToWindow();
234
235            DisplayMetrics metrics = new DisplayMetrics();
236            mWindowManager.getDefaultDisplay().getMetrics(metrics);
237            float density = metrics.density;
238
239            // create the confirmation cling
240            mClingLayout = (ViewGroup)
241                    View.inflate(getContext(), R.layout.immersive_mode_cling, null);
242
243            final Button ok = (Button) mClingLayout.findViewById(R.id.ok);
244            ok.setOnClickListener(new OnClickListener() {
245                @Override
246                public void onClick(View v) {
247                    mConfirm.run();
248                }
249            });
250            addView(mClingLayout, getBubbleLayoutParams());
251
252            if (ActivityManager.isHighEndGfx()) {
253                final View bubble = mClingLayout.findViewById(R.id.text);
254                bubble.setAlpha(0f);
255                bubble.setTranslationY(-OFFSET_DP*density);
256                bubble.animate()
257                        .alpha(1f)
258                        .translationY(0)
259                        .setDuration(300)
260                        .setInterpolator(new DecelerateInterpolator())
261                        .start();
262
263                ok.setAlpha(0f);
264                ok.setTranslationY(-OFFSET_DP*density);
265                ok.animate().alpha(1f)
266                        .translationY(0)
267                        .setDuration(300)
268                        .setStartDelay(200)
269                        .setInterpolator(new DecelerateInterpolator())
270                        .start();
271
272                mColorAnim = ValueAnimator.ofObject(new ArgbEvaluator(), 0, BGCOLOR);
273                mColorAnim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
274                    @Override
275                    public void onAnimationUpdate(ValueAnimator animation) {
276                        final int c = (Integer) animation.getAnimatedValue();
277                        mColor.setColor(c);
278                    }
279                });
280                mColorAnim.setDuration(1000);
281                mColorAnim.start();
282            } else {
283                mColor.setColor(BGCOLOR);
284            }
285
286            mContext.registerReceiver(mReceiver, new IntentFilter(Intent.ACTION_CONFIGURATION_CHANGED));
287        }
288
289        @Override
290        public void onDetachedFromWindow() {
291            mContext.unregisterReceiver(mReceiver);
292        }
293
294        @Override
295        public boolean onTouchEvent(MotionEvent motion) {
296            return true;
297        }
298    }
299
300    private void handleShow() {
301        if (DEBUG) Slog.d(TAG, "Showing immersive mode confirmation");
302
303        mClingWindow = new ClingWindowView(mContext, mConfirm);
304
305        // we will be hiding the nav bar, so layout as if it's already hidden
306        mClingWindow.setSystemUiVisibility(
307                View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION
308              | View.SYSTEM_UI_FLAG_LAYOUT_STABLE);
309
310        // show the confirmation
311        WindowManager.LayoutParams lp = getClingWindowLayoutParams();
312        mWindowManager.addView(mClingWindow, lp);
313    }
314
315    private final Runnable mConfirm = new Runnable() {
316        @Override
317        public void run() {
318            if (DEBUG) Slog.d(TAG, "mConfirm.run()");
319            if (!mConfirmed) {
320                mConfirmed = true;
321                saveSetting();
322            }
323            handleHide();
324        }
325    };
326
327    private final class H extends Handler {
328        private static final int SHOW = 1;
329        private static final int HIDE = 2;
330        private static final int PANIC = 3;
331
332        @Override
333        public void handleMessage(Message msg) {
334            switch(msg.what) {
335                case SHOW:
336                    handleShow();
337                    break;
338                case HIDE:
339                    handleHide();
340                    break;
341                case PANIC:
342                    handlePanic();
343                    break;
344            }
345        }
346    }
347}
348