src/com/android/photos/SelectionManager.java

   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.photos;
  18
  19 import android.app.Activity;
  20 import android.content.Intent;
  21 import android.net.Uri;
  22 import android.nfc.NfcAdapter;
  23 import android.nfc.NfcAdapter.CreateBeamUrisCallback;
  24 import android.nfc.NfcEvent;
  25 import android.provider.MediaStore.Files.FileColumns;
  26 import android.widget.ShareActionProvider;
  27
  28 import com.android.gallery3d.common.ApiHelper;
  29 import com.android.gallery3d.data.MediaObject;
  30 import com.android.gallery3d.util.GalleryUtils;
  31
  32 import java.util.ArrayList;
  33
  34 public class SelectionManager {
  35     private Activity mActivity;
  36     private NfcAdapter mNfcAdapter;
  37     private SelectedUriSource mUriSource;
  38     private Intent mShareIntent = new Intent();
  39
  40     public interface SelectedUriSource {
  41         public ArrayList<Uri> getSelectedShareableUris();
  42     }
  43
  44     public interface Client {
  45         public void setSelectionManager(SelectionManager manager);
  46     }
  47
  48     public SelectionManager(Activity activity) {
  49         mActivity = activity;
  50         if (ApiHelper.AT_LEAST_16) {
  51             mNfcAdapter = NfcAdapter.getDefaultAdapter(mActivity);
  52             mNfcAdapter.setBeamPushUrisCallback(new CreateBeamUrisCallback() {
  53                 @Override
  54                 public Uri[] createBeamUris(NfcEvent arg0) {
  55                  // This will have been preceded by a call to onItemSelectedStateChange
  56                     if (mCachedShareableUris == null) return null;
  57                     return mCachedShareableUris.toArray(
  58                             new Uri[mCachedShareableUris.size()]);
  59                 }
  60             }, mActivity);
  61         }
  62     }
  63
  64     public void setSelectedUriSource(SelectedUriSource source) {
  65         mUriSource = source;
  66     }
  67
  68     private int mSelectedTotalCount = 0;
  69     private int mSelectedShareableCount = 0;
  70     private int mSelectedShareableImageCount = 0;
  71     private int mSelectedShareableVideoCount = 0;
  72     private int mSelectedDeletableCount = 0;
  73
  74     private ArrayList<Uri> mCachedShareableUris = null;
  75
  76     public void onItemSelectedStateChanged(ShareActionProvider share,
  77             int itemType, int itemSupportedOperations, boolean selected) {
  78         int increment = selected ? 1 : -1;
  79
  80         mSelectedTotalCount += increment;
  81         mCachedShareableUris = null;
  82
  83         if ((itemSupportedOperations & MediaObject.SUPPORT_DELETE) > 0) {
  84             mSelectedDeletableCount += increment;
  85         }
  86         if ((itemSupportedOperations & MediaObject.SUPPORT_SHARE) > 0) {
  87             mSelectedShareableCount += increment;
  88             if (itemType == FileColumns.MEDIA_TYPE_IMAGE) {
  89                 mSelectedShareableImageCount += increment;
  90             } else if (itemType == FileColumns.MEDIA_TYPE_VIDEO) {
  91                 mSelectedShareableVideoCount += increment;
  92             }
  93         }
  94
  95         mShareIntent.removeExtra(Intent.EXTRA_STREAM);
  96         if (mSelectedShareableCount == 0) {
  97             mShareIntent.setAction(null).setType(null);
  98         } else if (mSelectedShareableCount >= 1) {
  99             mCachedShareableUris = mUriSource.getSelectedShareableUris();
 100             if (mCachedShareableUris.size() == 0) {
 101                 mShareIntent.setAction(null).setType(null);
 102             } else {
 103                 if (mSelectedShareableImageCount == mSelectedShareableCount) {
 104                     mShareIntent.setType(GalleryUtils.MIME_TYPE_IMAGE);
 105                 } else if (mSelectedShareableVideoCount == mSelectedShareableCount) {
 106                     mShareIntent.setType(GalleryUtils.MIME_TYPE_VIDEO);
 107                 } else {
 108                     mShareIntent.setType(GalleryUtils.MIME_TYPE_ALL);
 109                 }
 110                 if (mCachedShareableUris.size() == 1) {
 111                     mShareIntent.setAction(Intent.ACTION_SEND);
 112                     mShareIntent.putExtra(Intent.EXTRA_STREAM, mCachedShareableUris.get(0));
 113                 } else {
 114                     mShareIntent.setAction(Intent.ACTION_SEND_MULTIPLE);
 115                     mShareIntent.putExtra(Intent.EXTRA_STREAM, mCachedShareableUris);
 116                 }
 117             }
 118         }
 119         share.setShareIntent(mShareIntent);
 120
 121         // TODO update editability, etc.
 122     }
 123
 124     public int getSupportedOperations() {
 125         if (mSelectedTotalCount == 0) {
 126             return 0;
 127         }
 128         int supported = 0;
 129         if (mSelectedDeletableCount == mSelectedTotalCount) {
 130             supported |= MediaObject.SUPPORT_DELETE;
 131         }
 132         if (mSelectedShareableCount > 0) {
 133             supported |= MediaObject.SUPPORT_SHARE;
 134         }
 135         return supported;
 136     }
 137
 138     public void onClearSelection() {
 139         mSelectedTotalCount = 0;
 140         mSelectedShareableCount = 0;
 141         mSelectedShareableImageCount = 0;
 142         mSelectedShareableVideoCount = 0;
 143         mSelectedDeletableCount = 0;
 144         mCachedShareableUris = null;
 145         mShareIntent.removeExtra(Intent.EXTRA_STREAM);
 146         mShareIntent.setAction(null).setType(null);
 147     }
 148 }