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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 
     17 package com.android.systemui.recent;
     18 
     19 import android.app.ActivityOptions;
     20 import android.content.ActivityNotFoundException;
     21 import android.content.Context;
     22 import android.content.Intent;
     23 import android.content.res.Configuration;
     24 import android.content.res.Resources;
     25 import android.graphics.Bitmap;
     26 import android.graphics.Canvas;
     27 import android.graphics.Paint;
     28 import android.graphics.drawable.BitmapDrawable;
     29 import android.graphics.drawable.Drawable;
     30 import android.os.Bundle;
     31 import android.os.UserHandle;
     32 import android.util.DisplayMetrics;
     33 import android.util.Log;
     34 import android.view.Display;
     35 import android.view.View;
     36 import com.android.systemui.R;
     37 import com.android.systemui.RecentsComponent;
     38 import com.android.systemui.SystemUI;
     39 import com.android.systemui.recents.AlternateRecentsComponent;
     40 
     41 
     42 public class Recents extends SystemUI implements RecentsComponent {
     43     private static final String TAG = "Recents";
     44     private static final boolean DEBUG = true;
     45 
     46     // Which recents to use
     47     boolean mUseAlternateRecents = true;
     48     boolean mBootCompleted = false;
     49     static AlternateRecentsComponent sAlternateRecents;
     50 
     51     /** Returns the Recents component, creating a new one in-process if necessary. */
     52     public static AlternateRecentsComponent getRecentsComponent(Context context,
     53             boolean forceInitialize) {
     54         if (sAlternateRecents == null) {
     55             sAlternateRecents = new AlternateRecentsComponent(context);
     56             if (forceInitialize) {
     57                 sAlternateRecents.onStart();
     58                 sAlternateRecents.onBootCompleted();
     59             }
     60         }
     61         return sAlternateRecents;
     62     }
     63 
     64     @Override
     65     public void start() {
     66         if (mUseAlternateRecents) {
     67             if (sAlternateRecents == null) {
     68                 sAlternateRecents = getRecentsComponent(mContext, false);
     69             }
     70             sAlternateRecents.onStart();
     71         }
     72 
     73         putComponent(RecentsComponent.class, this);
     74     }
     75 
     76     @Override
     77     protected void onBootCompleted() {
     78         if (mUseAlternateRecents) {
     79             if (sAlternateRecents != null) {
     80                 sAlternateRecents.onBootCompleted();
     81             }
     82         }
     83         mBootCompleted = true;
     84     }
     85 
     86     @Override
     87     public void showRecents(boolean triggeredFromAltTab, View statusBarView) {
     88         if (mUseAlternateRecents) {
     89             sAlternateRecents.onShowRecents(triggeredFromAltTab);
     90         }
     91     }
     92 
     93     @Override
     94     public void hideRecents(boolean triggeredFromAltTab, boolean triggeredFromHomeKey) {
     95         if (mUseAlternateRecents) {
     96             sAlternateRecents.onHideRecents(triggeredFromAltTab, triggeredFromHomeKey);
     97         } else {
     98             Intent intent = new Intent(RecentsActivity.CLOSE_RECENTS_INTENT);
     99             intent.setPackage("com.android.systemui");
    100             sendBroadcastSafely(intent);
    101 
    102             RecentTasksLoader.getInstance(mContext).cancelPreloadingFirstTask();
    103         }
    104     }
    105 
    106     @Override
    107     public void toggleRecents(Display display, int layoutDirection, View statusBarView) {
    108         if (mUseAlternateRecents) {
    109             // Launch the alternate recents if required
    110             sAlternateRecents.onToggleRecents();
    111             return;
    112         }
    113 
    114         if (DEBUG) Log.d(TAG, "toggle recents panel");
    115         try {
    116             TaskDescription firstTask = RecentTasksLoader.getInstance(mContext).getFirstTask();
    117 
    118             Intent intent = new Intent(RecentsActivity.TOGGLE_RECENTS_INTENT);
    119             intent.setClassName("com.android.systemui",
    120                     "com.android.systemui.recent.RecentsActivity");
    121             intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
    122                     | Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
    123 
    124             if (firstTask == null) {
    125                 if (RecentsActivity.forceOpaqueBackground(mContext)) {
    126                     ActivityOptions opts = ActivityOptions.makeCustomAnimation(mContext,
    127                             R.anim.recents_launch_from_launcher_enter,
    128                             R.anim.recents_launch_from_launcher_exit);
    129                     mContext.startActivityAsUser(intent, opts.toBundle(), new UserHandle(
    130                             UserHandle.USER_CURRENT));
    131                 } else {
    132                     // The correct window animation will be applied via the activity's style
    133                     mContext.startActivityAsUser(intent, new UserHandle(
    134                             UserHandle.USER_CURRENT));
    135                 }
    136 
    137             } else {
    138                 Bitmap first = null;
    139                 if (firstTask.getThumbnail() instanceof BitmapDrawable) {
    140                     first = ((BitmapDrawable) firstTask.getThumbnail()).getBitmap();
    141                 } else {
    142                     first = Bitmap.createBitmap(1, 1, Bitmap.Config.ARGB_8888);
    143                     Drawable d = RecentTasksLoader.getInstance(mContext).getDefaultThumbnail();
    144                     d.draw(new Canvas(first));
    145                 }
    146                 final Resources res = mContext.getResources();
    147 
    148                 float thumbWidth = res
    149                         .getDimensionPixelSize(R.dimen.status_bar_recents_thumbnail_width);
    150                 float thumbHeight = res
    151                         .getDimensionPixelSize(R.dimen.status_bar_recents_thumbnail_height);
    152                 if (first == null) {
    153                     throw new RuntimeException("Recents thumbnail is null");
    154                 }
    155                 if (first.getWidth() != thumbWidth || first.getHeight() != thumbHeight) {
    156                     first = Bitmap.createScaledBitmap(first, (int) thumbWidth, (int) thumbHeight,
    157                             true);
    158                     if (first == null) {
    159                         throw new RuntimeException("Recents thumbnail is null");
    160                     }
    161                 }
    162 
    163 
    164                 DisplayMetrics dm = new DisplayMetrics();
    165                 display.getMetrics(dm);
    166                 // calculate it here, but consider moving it elsewhere
    167                 // first, determine which orientation you're in.
    168                 final Configuration config = res.getConfiguration();
    169                 int x, y;
    170 
    171                 if (config.orientation == Configuration.ORIENTATION_PORTRAIT) {
    172                     float appLabelLeftMargin = res.getDimensionPixelSize(
    173                             R.dimen.status_bar_recents_app_label_left_margin);
    174                     float appLabelWidth = res.getDimensionPixelSize(
    175                             R.dimen.status_bar_recents_app_label_width);
    176                     float thumbLeftMargin = res.getDimensionPixelSize(
    177                             R.dimen.status_bar_recents_thumbnail_left_margin);
    178                     float thumbBgPadding = res.getDimensionPixelSize(
    179                             R.dimen.status_bar_recents_thumbnail_bg_padding);
    180 
    181                     float width = appLabelLeftMargin +
    182                             +appLabelWidth
    183                             + thumbLeftMargin
    184                             + thumbWidth
    185                             + 2 * thumbBgPadding;
    186 
    187                     x = (int) ((dm.widthPixels - width) / 2f + appLabelLeftMargin + appLabelWidth
    188                             + thumbBgPadding + thumbLeftMargin);
    189                     y = (int) (dm.heightPixels
    190                             - res.getDimensionPixelSize(R.dimen.status_bar_recents_thumbnail_height)
    191                             - thumbBgPadding);
    192                     if (layoutDirection == View.LAYOUT_DIRECTION_RTL) {
    193                         x = dm.widthPixels - x - res.getDimensionPixelSize(
    194                                 R.dimen.status_bar_recents_thumbnail_width);
    195                     }
    196 
    197                 } else { // if (config.orientation == Configuration.ORIENTATION_LANDSCAPE) {
    198                     float thumbTopMargin = res.getDimensionPixelSize(
    199                             R.dimen.status_bar_recents_thumbnail_top_margin);
    200                     float thumbBgPadding = res.getDimensionPixelSize(
    201                             R.dimen.status_bar_recents_thumbnail_bg_padding);
    202                     float textPadding = res.getDimensionPixelSize(
    203                             R.dimen.status_bar_recents_text_description_padding);
    204                     float labelTextSize = res.getDimensionPixelSize(
    205                             R.dimen.status_bar_recents_app_label_text_size);
    206                     Paint p = new Paint();
    207                     p.setTextSize(labelTextSize);
    208                     float labelTextHeight = p.getFontMetricsInt().bottom
    209                             - p.getFontMetricsInt().top;
    210                     float descriptionTextSize = res.getDimensionPixelSize(
    211                             R.dimen.status_bar_recents_app_description_text_size);
    212                     p.setTextSize(descriptionTextSize);
    213                     float descriptionTextHeight = p.getFontMetricsInt().bottom
    214                             - p.getFontMetricsInt().top;
    215 
    216                     float statusBarHeight = res.getDimensionPixelSize(
    217                             com.android.internal.R.dimen.status_bar_height);
    218                     float recentsItemTopPadding = statusBarHeight;
    219 
    220                     float height = thumbTopMargin
    221                             + thumbHeight
    222                             + 2 * thumbBgPadding + textPadding + labelTextHeight
    223                             + recentsItemTopPadding + textPadding + descriptionTextHeight;
    224                     float recentsItemRightPadding = res
    225                             .getDimensionPixelSize(R.dimen.status_bar_recents_item_padding);
    226                     float recentsScrollViewRightPadding = res
    227                             .getDimensionPixelSize(R.dimen.status_bar_recents_right_glow_margin);
    228                     x = (int) (dm.widthPixels - res
    229                             .getDimensionPixelSize(R.dimen.status_bar_recents_thumbnail_width)
    230                             - thumbBgPadding - recentsItemRightPadding
    231                             - recentsScrollViewRightPadding);
    232                     y = (int) ((dm.heightPixels - statusBarHeight - height) / 2f + thumbTopMargin
    233                             + recentsItemTopPadding + thumbBgPadding + statusBarHeight);
    234                 }
    235 
    236                 ActivityOptions opts = ActivityOptions.makeThumbnailScaleDownAnimation(
    237                         statusBarView,
    238                         first, x, y,
    239                         new ActivityOptions.OnAnimationStartedListener() {
    240                             public void onAnimationStarted() {
    241                                 Intent intent =
    242                                         new Intent(RecentsActivity.WINDOW_ANIMATION_START_INTENT);
    243                                 intent.setPackage("com.android.systemui");
    244                                 sendBroadcastSafely(intent);
    245                             }
    246                         });
    247                 intent.putExtra(RecentsActivity.WAITING_FOR_WINDOW_ANIMATION_PARAM, true);
    248                 startActivitySafely(intent, opts.toBundle());
    249             }
    250         } catch (ActivityNotFoundException e) {
    251             Log.e(TAG, "Failed to launch RecentAppsIntent", e);
    252         }
    253     }
    254 
    255     @Override
    256     protected void onConfigurationChanged(Configuration newConfig) {
    257         if (mUseAlternateRecents) {
    258             sAlternateRecents.onConfigurationChanged(newConfig);
    259         }
    260     }
    261 
    262     @Override
    263     public void preloadRecents() {
    264         if (mUseAlternateRecents) {
    265             sAlternateRecents.onPreloadRecents();
    266         } else {
    267             Intent intent = new Intent(RecentsActivity.PRELOAD_INTENT);
    268             intent.setClassName("com.android.systemui",
    269                     "com.android.systemui.recent.RecentsPreloadReceiver");
    270             sendBroadcastSafely(intent);
    271 
    272             RecentTasksLoader.getInstance(mContext).preloadFirstTask();
    273         }
    274     }
    275 
    276     @Override
    277     public void cancelPreloadingRecents() {
    278         if (mUseAlternateRecents) {
    279             sAlternateRecents.onCancelPreloadingRecents();
    280         } else {
    281             Intent intent = new Intent(RecentsActivity.CANCEL_PRELOAD_INTENT);
    282             intent.setClassName("com.android.systemui",
    283                     "com.android.systemui.recent.RecentsPreloadReceiver");
    284             sendBroadcastSafely(intent);
    285 
    286             RecentTasksLoader.getInstance(mContext).cancelPreloadingFirstTask();
    287         }
    288     }
    289 
    290     @Override
    291     public void showNextAffiliatedTask() {
    292         if (mUseAlternateRecents) {
    293             sAlternateRecents.onShowNextAffiliatedTask();
    294         }
    295     }
    296 
    297     @Override
    298     public void showPrevAffiliatedTask() {
    299         if (mUseAlternateRecents) {
    300             sAlternateRecents.onShowPrevAffiliatedTask();
    301         }
    302     }
    303 
    304     @Override
    305     public void setCallback(Callbacks cb) {
    306         if (mUseAlternateRecents) {
    307             sAlternateRecents.setRecentsComponentCallback(cb);
    308         }
    309     }
    310 
    311     /**
    312      * Send broadcast only if BOOT_COMPLETED
    313      */
    314     private void sendBroadcastSafely(Intent intent) {
    315         if (!mBootCompleted) return;
    316         mContext.sendBroadcastAsUser(intent, new UserHandle(UserHandle.USER_CURRENT));
    317     }
    318 
    319     /**
    320      * Start activity only if BOOT_COMPLETED
    321      */
    322     private void startActivitySafely(Intent intent, Bundle opts) {
    323         if (!mBootCompleted) return;
    324         mContext.startActivityAsUser(intent, opts, new UserHandle(UserHandle.USER_CURRENT));
    325     }
    326 }
    327