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      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 package com.android.keyguard;
     17 
     18 import android.app.Presentation;
     19 import android.content.Context;
     20 import android.content.DialogInterface;
     21 import android.content.DialogInterface.OnDismissListener;
     22 import android.graphics.Point;
     23 import android.media.MediaRouter;
     24 import android.media.MediaRouter.RouteInfo;
     25 import android.os.Bundle;
     26 import android.util.Slog;
     27 import android.view.Display;
     28 import android.view.View;
     29 import android.view.WindowManager;
     30 
     31 public class KeyguardDisplayManager {
     32     protected static final String TAG = "KeyguardDisplayManager";
     33     private static boolean DEBUG = KeyguardConstants.DEBUG;
     34     Presentation mPresentation;
     35     private MediaRouter mMediaRouter;
     36     private Context mContext;
     37     private boolean mShowing;
     38 
     39     public KeyguardDisplayManager(Context context) {
     40         mContext = context;
     41         mMediaRouter = (MediaRouter) mContext.getSystemService(Context.MEDIA_ROUTER_SERVICE);
     42     }
     43 
     44     public void show() {
     45         if (!mShowing) {
     46             if (DEBUG) Slog.v(TAG, "show");
     47             mMediaRouter.addCallback(MediaRouter.ROUTE_TYPE_REMOTE_DISPLAY,
     48                     mMediaRouterCallback, MediaRouter.CALLBACK_FLAG_PASSIVE_DISCOVERY);
     49             updateDisplays(true);
     50         }
     51         mShowing = true;
     52     }
     53 
     54     public void hide() {
     55         if (mShowing) {
     56             if (DEBUG) Slog.v(TAG, "hide");
     57             mMediaRouter.removeCallback(mMediaRouterCallback);
     58             updateDisplays(false);
     59         }
     60         mShowing = false;
     61     }
     62 
     63     private final MediaRouter.SimpleCallback mMediaRouterCallback =
     64             new MediaRouter.SimpleCallback() {
     65         @Override
     66         public void onRouteSelected(MediaRouter router, int type, RouteInfo info) {
     67             if (DEBUG) Slog.d(TAG, "onRouteSelected: type=" + type + ", info=" + info);
     68             updateDisplays(mShowing);
     69         }
     70 
     71         @Override
     72         public void onRouteUnselected(MediaRouter router, int type, RouteInfo info) {
     73             if (DEBUG) Slog.d(TAG, "onRouteUnselected: type=" + type + ", info=" + info);
     74             updateDisplays(mShowing);
     75         }
     76 
     77         @Override
     78         public void onRoutePresentationDisplayChanged(MediaRouter router, RouteInfo info) {
     79             if (DEBUG) Slog.d(TAG, "onRoutePresentationDisplayChanged: info=" + info);
     80             updateDisplays(mShowing);
     81         }
     82     };
     83 
     84     private OnDismissListener mOnDismissListener = new OnDismissListener() {
     85 
     86         @Override
     87         public void onDismiss(DialogInterface dialog) {
     88             mPresentation = null;
     89         }
     90     };
     91 
     92     protected void updateDisplays(boolean showing) {
     93         if (showing) {
     94             MediaRouter.RouteInfo route = mMediaRouter.getSelectedRoute(
     95                     MediaRouter.ROUTE_TYPE_REMOTE_DISPLAY);
     96             boolean useDisplay = route != null
     97                     && route.getPlaybackType() == MediaRouter.RouteInfo.PLAYBACK_TYPE_REMOTE;
     98             Display presentationDisplay = useDisplay ? route.getPresentationDisplay() : null;
     99 
    100             if (mPresentation != null && mPresentation.getDisplay() != presentationDisplay) {
    101                 if (DEBUG) Slog.v(TAG, "Display gone: " + mPresentation.getDisplay());
    102                 mPresentation.dismiss();
    103                 mPresentation = null;
    104             }
    105 
    106             if (mPresentation == null && presentationDisplay != null) {
    107                 if (DEBUG) Slog.i(TAG, "Keyguard enabled on display: " + presentationDisplay);
    108                 mPresentation = new KeyguardPresentation(mContext, presentationDisplay);
    109                 mPresentation.setOnDismissListener(mOnDismissListener);
    110                 try {
    111                     mPresentation.show();
    112                 } catch (WindowManager.InvalidDisplayException ex) {
    113                     Slog.w(TAG, "Invalid display:", ex);
    114                     mPresentation = null;
    115                 }
    116             }
    117         } else {
    118             if (mPresentation != null) {
    119                 mPresentation.dismiss();
    120                 mPresentation = null;
    121             }
    122         }
    123     }
    124 
    125     private final static class KeyguardPresentation extends Presentation {
    126         private static final int VIDEO_SAFE_REGION = 80; // Percentage of display width & height
    127         private static final int MOVE_CLOCK_TIMEOUT = 10000; // 10s
    128         private View mClock;
    129         private int mUsableWidth;
    130         private int mUsableHeight;
    131         private int mMarginTop;
    132         private int mMarginLeft;
    133         Runnable mMoveTextRunnable = new Runnable() {
    134             @Override
    135             public void run() {
    136                 int x = mMarginLeft + (int) (Math.random() * (mUsableWidth - mClock.getWidth()));
    137                 int y = mMarginTop + (int) (Math.random() * (mUsableHeight - mClock.getHeight()));
    138                 mClock.setTranslationX(x);
    139                 mClock.setTranslationY(y);
    140                 mClock.postDelayed(mMoveTextRunnable, MOVE_CLOCK_TIMEOUT);
    141             }
    142         };
    143 
    144         public KeyguardPresentation(Context context, Display display) {
    145             super(context, display);
    146             getWindow().setType(WindowManager.LayoutParams.TYPE_KEYGUARD_DIALOG);
    147         }
    148 
    149         public void onDetachedFromWindow() {
    150             mClock.removeCallbacks(mMoveTextRunnable);
    151         }
    152 
    153         @Override
    154         protected void onCreate(Bundle savedInstanceState) {
    155             super.onCreate(savedInstanceState);
    156 
    157             Point p = new Point();
    158             getDisplay().getSize(p);
    159             mUsableWidth = VIDEO_SAFE_REGION * p.x/100;
    160             mUsableHeight = VIDEO_SAFE_REGION * p.y/100;
    161             mMarginLeft = (100 - VIDEO_SAFE_REGION) * p.x / 200;
    162             mMarginTop = (100 - VIDEO_SAFE_REGION) * p.y / 200;
    163 
    164             setContentView(R.layout.keyguard_presentation);
    165             mClock = findViewById(R.id.clock);
    166 
    167             // Avoid screen burn in
    168             mClock.post(mMoveTextRunnable);
    169         }
    170     }
    171 }
    172