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      1 /*
      2  * Copyright (C) 2017 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.incallui.incall.impl;
     18 
     19 import android.support.annotation.Nullable;
     20 import android.support.v4.app.Fragment;
     21 import android.support.v4.app.FragmentManager;
     22 import android.support.v4.app.FragmentStatePagerAdapter;
     23 import android.support.v4.view.PagerAdapter;
     24 import com.android.dialer.common.Assert;
     25 import com.android.dialer.multimedia.MultimediaData;
     26 import com.android.incallui.sessiondata.MultimediaFragment;
     27 
     28 /** View pager adapter for in call ui. */
     29 public class InCallPagerAdapter extends FragmentStatePagerAdapter {
     30 
     31   @Nullable private MultimediaData attachments;
     32   private final boolean showInCallButtonGrid;
     33 
     34   public InCallPagerAdapter(
     35       FragmentManager fragmentManager,
     36       @Nullable MultimediaData attachments,
     37       boolean showInCallButtonGrid) {
     38     super(fragmentManager);
     39     this.attachments = attachments;
     40     this.showInCallButtonGrid = showInCallButtonGrid;
     41   }
     42 
     43   @Override
     44   public Fragment getItem(int position) {
     45     if (!showInCallButtonGrid) {
     46       // TODO(calderwoodra): handle fragment invalidation for when the data changes.
     47       return MultimediaFragment.newInstance(
     48           attachments, true /* isInteractive */, false /* showAvatar */, false /* isSpam */);
     49 
     50     } else if (position == getButtonGridPosition()) {
     51       return InCallButtonGridFragment.newInstance();
     52 
     53     } else {
     54       return MultimediaFragment.newInstance(
     55           attachments, true /* isInteractive */, false /* showAvatar */, false /* isSpam */);
     56     }
     57   }
     58 
     59   @Override
     60   public int getCount() {
     61     int count = 0;
     62     if (showInCallButtonGrid) {
     63       count++;
     64     }
     65     if (attachments != null && attachments.hasData()) {
     66       count++;
     67     }
     68     Assert.checkArgument(count > 0, "InCallPager adapter doesn't have any pages.");
     69     return count;
     70   }
     71 
     72   public void setAttachments(@Nullable MultimediaData attachments) {
     73     if (this.attachments != attachments) {
     74       this.attachments = attachments;
     75       notifyDataSetChanged();
     76     }
     77   }
     78 
     79   public int getButtonGridPosition() {
     80     return getCount() - 1;
     81   }
     82 
     83   //this is called when notifyDataSetChanged() is called
     84   @Override
     85   public int getItemPosition(Object object) {
     86     // refresh all fragments when data set changed
     87     return PagerAdapter.POSITION_NONE;
     88   }
     89 }
     90