| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file |
| * except in compliance with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software distributed under the |
| * License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the specific language governing |
| * permissions and limitations under the License. |
| */ |
| |
| package com.android.systemui.tuner; |
| |
| import android.content.Context; |
| import android.util.AttributeSet; |
| import android.view.MotionEvent; |
| |
| import com.android.systemui.Dependency; |
| import com.android.systemui.statusbar.phone.NavigationBarInflaterView; |
| |
| public class PreviewNavInflater extends NavigationBarInflaterView { |
| |
| public PreviewNavInflater(Context context, AttributeSet attrs) { |
| super(context, attrs); |
| } |
| |
| @Override |
| protected void onAttachedToWindow() { |
| super.onAttachedToWindow(); |
| // Immediately remove tuner listening, since this is a preview, all values will be injected |
| // manually. |
| Dependency.get(TunerService.class).removeTunable(this); |
| } |
| |
| @Override |
| public boolean onInterceptTouchEvent(MotionEvent ev) { |
| // Only a preview, not interactable. |
| return true; |
| } |
| |
| @Override |
| public void onTuningChanged(String key, String newValue) { |
| if (NAV_BAR_VIEWS.equals(key)) { |
| // Since this is a preview we might get a bunch of random stuff, validate before sending |
| // for inflation. |
| if (isValidLayout(newValue)) { |
| super.onTuningChanged(key, newValue); |
| } |
| } else { |
| super.onTuningChanged(key, newValue); |
| } |
| } |
| |
| private boolean isValidLayout(String newValue) { |
| if (newValue == null) { |
| return true; |
| } |
| int separatorCount = 0; |
| int lastGravitySeparator = 0; |
| for (int i = 0; i < newValue.length(); i++) { |
| if (newValue.charAt(i) == GRAVITY_SEPARATOR.charAt(0)) { |
| if (i == 0 || (i - lastGravitySeparator) == 1) { |
| return false; |
| } |
| lastGravitySeparator = i; |
| separatorCount++; |
| } |
| } |
| return separatorCount == 2 && (newValue.length() - lastGravitySeparator) != 1; |
| } |
| } |