Home | History | Annotate | Download | only in tuner 
      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
      5  * except in compliance with the License. You may obtain a copy of the License at
      6  *
      7  *      http://www.apache.org/licenses/LICENSE-2.0
      8  *
      9  * Unless required by applicable law or agreed to in writing, software distributed under the
     10  * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
     11  * KIND, either express or implied. See the License for the specific language governing
     12  * permissions and limitations under the License.
     13  */
     14 
     15 package com.android.systemui.tuner;
     16 
     17 import android.content.Context;
     18 import android.util.AttributeSet;
     19 import android.view.MotionEvent;
     20 
     21 import com.android.systemui.Dependency;
     22 import com.android.systemui.statusbar.phone.NavigationBarInflaterView;
     23 
     24 public class PreviewNavInflater extends NavigationBarInflaterView {
     25 
     26     public PreviewNavInflater(Context context, AttributeSet attrs) {
     27         super(context, attrs);
     28     }
     29 
     30     @Override
     31     protected void onAttachedToWindow() {
     32         super.onAttachedToWindow();
     33         // Immediately remove tuner listening, since this is a preview, all values will be injected
     34         // manually.
     35         Dependency.get(TunerService.class).removeTunable(this);
     36     }
     37 
     38     @Override
     39     public boolean onInterceptTouchEvent(MotionEvent ev) {
     40         // Only a preview, not interactable.
     41         return true;
     42     }
     43 
     44     @Override
     45     public void onTuningChanged(String key, String newValue) {
     46         if (NAV_BAR_VIEWS.equals(key)) {
     47             // Since this is a preview we might get a bunch of random stuff, validate before sending
     48             // for inflation.
     49             if (isValidLayout(newValue)) {
     50                 super.onTuningChanged(key, newValue);
     51             }
     52         } else {
     53             super.onTuningChanged(key, newValue);
     54         }
     55     }
     56 
     57     private boolean isValidLayout(String newValue) {
     58         if (newValue == null) {
     59             return true;
     60         }
     61         int separatorCount = 0;
     62         int lastGravitySeparator = 0;
     63         for (int i = 0; i < newValue.length(); i++) {
     64             if (newValue.charAt(i) == GRAVITY_SEPARATOR.charAt(0)) {
     65                 if (i == 0 || (i - lastGravitySeparator) == 1) {
     66                     return false;
     67                 }
     68                 lastGravitySeparator = i;
     69                 separatorCount++;
     70             }
     71         }
     72         return separatorCount == 2 && (newValue.length() - lastGravitySeparator) != 1;
     73     }
     74 }
     75