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      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 
     17 package com.android.systemui.recents;
     18 
     19 import android.content.Context;
     20 import android.content.res.Resources;
     21 import android.graphics.Rect;
     22 
     23 import com.android.systemui.R;
     24 import com.android.systemui.recents.misc.SystemServicesProxy;
     25 
     26 /**
     27  * Application resources that can be retrieved from the application context and are not specifically
     28  * tied to the current activity.
     29  */
     30 public class RecentsConfiguration {
     31 
     32     private static final int LARGE_SCREEN_MIN_DP = 600;
     33     private static final int XLARGE_SCREEN_MIN_DP = 720;
     34 
     35     /** Levels of svelte in increasing severity/austerity. */
     36     // No svelting.
     37     public static final int SVELTE_NONE = 0;
     38     // Limit thumbnail cache to number of visible thumbnails when Recents was loaded, disable
     39     // caching thumbnails as you scroll.
     40     public static final int SVELTE_LIMIT_CACHE = 1;
     41     // Disable the thumbnail cache, load thumbnails asynchronously when the activity loads and
     42     // evict all thumbnails when hidden.
     43     public static final int SVELTE_DISABLE_CACHE = 2;
     44     // Disable all thumbnail loading.
     45     public static final int SVELTE_DISABLE_LOADING = 3;
     46 
     47     // Launch states
     48     public RecentsActivityLaunchState mLaunchState = new RecentsActivityLaunchState();
     49 
     50     // Since the positions in Recents has to be calculated globally (before the RecentsActivity
     51     // starts), we need to calculate some resource values ourselves, instead of relying on framework
     52     // resources.
     53     public final boolean isLargeScreen;
     54     public final boolean isXLargeScreen;
     55     public final int smallestWidth;
     56 
     57     /** Misc **/
     58     public boolean fakeShadows;
     59     public int svelteLevel;
     60 
     61     public RecentsConfiguration(Context context) {
     62         // Load only resources that can not change after the first load either through developer
     63         // settings or via multi window
     64         SystemServicesProxy ssp = Recents.getSystemServices();
     65         Context appContext = context.getApplicationContext();
     66         Resources res = appContext.getResources();
     67         fakeShadows = res.getBoolean(R.bool.config_recents_fake_shadows);
     68         svelteLevel = res.getInteger(R.integer.recents_svelte_level);
     69 
     70         float screenDensity = context.getResources().getDisplayMetrics().density;
     71         smallestWidth = ssp.getDeviceSmallestWidth();
     72         isLargeScreen = smallestWidth >= (int) (screenDensity * LARGE_SCREEN_MIN_DP);
     73         isXLargeScreen = smallestWidth >= (int) (screenDensity * XLARGE_SCREEN_MIN_DP);
     74     }
     75 
     76     /**
     77      * Returns the activity launch state.
     78      * TODO: This will be refactored out of RecentsConfiguration.
     79      */
     80     public RecentsActivityLaunchState getLaunchState() {
     81         return mLaunchState;
     82     }
     83 }
     84