1 files changed, 126 insertions, 0 deletions
diff --git a/src/com/android/photos/SelectionManager.java b/src/com/android/photos/SelectionManager.java
new file mode 100644
index 000000000..d7e61d19a
--- /dev/null
+++ b/src/com/android/photos/SelectionManager.java
@@ -0,0 +1,126 @@
+/*
+ * Copyright (C) 2013 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.photos;
+
+import android.annotation.TargetApi;
+import android.app.Activity;
+import android.content.Intent;
+import android.net.Uri;
+import android.nfc.NfcAdapter;
+import android.nfc.NfcEvent;
+import android.provider.MediaStore.Files.FileColumns;
+import android.widget.ShareActionProvider;
+
+import com.android.gallery3d.common.ApiHelper;
+import com.android.gallery3d.data.MediaItem;
+import com.android.gallery3d.util.GalleryUtils;
+
+import java.util.ArrayList;
+
+public class SelectionManager implements NfcAdapter.CreateBeamUrisCallback {
+    private Activity mActivity;
+    private NfcAdapter mNfcAdapter;
+    private SelectedUriSource mUriSource;
+    private Intent mShareIntent = new Intent();
+
+    public interface SelectedUriSource {
+        public ArrayList<Uri> getSelectedShareableUris();
+    }
+
+    @TargetApi(16)
+    public SelectionManager(Activity activity) {
+        mActivity = activity;
+        if (ApiHelper.AT_LEAST_16) {
+            mNfcAdapter = NfcAdapter.getDefaultAdapter(mActivity);
+            mNfcAdapter.setBeamPushUrisCallback(this, mActivity);
+        }
+    }
+
+    public void setSelectedUriSource(SelectedUriSource source) {
+        mUriSource = source;
+    }
+
+    private int mSelectedTotalCount = 0;
+    private int mSelectedShareableCount = 0;
+    private int mSelectedShareableImageCount = 0;
+    private int mSelectedShareableVideoCount = 0;
+    private int mSelectedDeletableCount = 0;
+
+    private ArrayList<Uri> mCachedShareableUris = null;
+
+    public void onItemSelectedStateChanged(ShareActionProvider share,
+            int itemType, int itemSupportedOperations, boolean selected) {
+        int increment = selected ? 1 : -1;
+
+        mSelectedTotalCount += increment;
+        mCachedShareableUris = null;
+
+        if ((itemSupportedOperations & MediaItem.SUPPORT_DELETE) > 0) {
+            mSelectedDeletableCount += increment;
+        }
+        if ((itemSupportedOperations & MediaItem.SUPPORT_SHARE) > 0) {
+            mSelectedShareableCount += increment;
+            if (itemType == FileColumns.MEDIA_TYPE_IMAGE) {
+                mSelectedShareableImageCount += increment;
+            } else if (itemType == FileColumns.MEDIA_TYPE_VIDEO) {
+                mSelectedShareableVideoCount += increment;
+            }
+        }
+
+        mShareIntent.removeExtra(Intent.EXTRA_STREAM);
+        if (mSelectedShareableCount == 0) {
+            mShareIntent.setAction(null).setType(null);
+        } else if (mSelectedShareableCount >= 1) {
+            mCachedShareableUris = mUriSource.getSelectedShareableUris();
+            if (mSelectedShareableImageCount == mSelectedShareableCount) {
+                mShareIntent.setType(GalleryUtils.MIME_TYPE_IMAGE);
+            } else if (mSelectedShareableVideoCount == mSelectedShareableCount) {
+                mShareIntent.setType(GalleryUtils.MIME_TYPE_VIDEO);
+            } else {
+                mShareIntent.setType(GalleryUtils.MIME_TYPE_ALL);
+            }
+            if (mSelectedShareableCount == 1) {
+                mShareIntent.setAction(Intent.ACTION_SEND);
+                mShareIntent.putExtra(Intent.EXTRA_STREAM, mCachedShareableUris.get(0));
+            } else {
+                mShareIntent.setAction(Intent.ACTION_SEND_MULTIPLE);
+                mShareIntent.putExtra(Intent.EXTRA_STREAM, mCachedShareableUris);
+            }
+        }
+        share.setShareIntent(mShareIntent);
+
+        // TODO update deletability, editability, etc.
+    }
+
+    public void onClearSelection() {
+        mSelectedTotalCount = 0;
+        mSelectedShareableCount = 0;
+        mSelectedShareableImageCount = 0;
+        mSelectedShareableVideoCount = 0;
+        mSelectedDeletableCount = 0;
+        mCachedShareableUris = null;
+        mShareIntent.removeExtra(Intent.EXTRA_STREAM);
+        mShareIntent.setAction(null).setType(null);
+    }
+
+    @Override
+    public Uri[] createBeamUris(NfcEvent event) {
+        // This will have been preceded by a call to onItemSelectedStateChange
+        if (mCachedShareableUris == null) return null;
+        return mCachedShareableUris.toArray(new Uri[mCachedShareableUris.size()]);
+    }
+}