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/*
* 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.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.AsyncTask;
import android.util.SparseBooleanArray;
import android.view.ActionMode;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.widget.AbsListView.MultiChoiceModeListener;
import android.widget.ShareActionProvider;
import android.widget.ShareActionProvider.OnShareTargetSelectedListener;
import com.android.gallery3d.R;
import com.android.gallery3d.data.MediaObject;
import java.util.ArrayList;
import java.util.List;
public class MultiChoiceManager implements MultiChoiceModeListener,
OnShareTargetSelectedListener, SelectionManager.SelectedUriSource {
public interface Delegate {
public SparseBooleanArray getSelectedItemPositions();
public int getSelectedItemCount();
public int getItemMediaType(Object item);
public int getItemSupportedOperations(Object item);
public ArrayList<Uri> getSubItemUrisForItem(Object item);
public Object getItemAtPosition(int position);
public Object getPathForItemAtPosition(int position);
public void deleteItemWithPath(Object itemPath);
}
private SelectionManager mSelectionManager;
private ShareActionProvider mShareActionProvider;
private ActionMode mActionMode;
private int numSubItemsCollected = 0;
private Context mContext;
private Delegate mDelegate;
private ArrayList<Uri> mSelectedUrisArray = new ArrayList<Uri>();
public MultiChoiceManager(Context context, Delegate delegate) {
mContext = context;
mDelegate = delegate;
}
public void setSelectionManager(SelectionManager selectionManager) {
mSelectionManager = selectionManager;
}
@Override
public ArrayList<Uri> getSelectedShareableUris() {
return mSelectedUrisArray;
}
private void updateSelectedTitle(ActionMode mode) {
int count = mDelegate.getSelectedItemCount();
mode.setTitle(mContext.getResources().getQuantityString(
R.plurals.number_of_items_selected, count, count));
}
@Override
public void onItemCheckedStateChanged(ActionMode mode, int position, long id,
boolean checked) {
updateSelectedTitle(mode);
Object item = mDelegate.getItemAtPosition(position);
ArrayList<Uri> subItems = mDelegate.getSubItemUrisForItem(item);
if (checked) {
mSelectedUrisArray.addAll(subItems);
numSubItemsCollected += subItems.size();
} else {
mSelectedUrisArray.removeAll(subItems);
numSubItemsCollected -= subItems.size();
}
mSelectionManager.onItemSelectedStateChanged(mShareActionProvider,
mDelegate.getItemMediaType(item),
mDelegate.getItemSupportedOperations(item),
checked);
updateActionItemVisibilities(mode.getMenu(),
mSelectionManager.getSupportedOperations());
}
private void updateActionItemVisibilities(Menu menu, int supportedOperations) {
MenuItem shareItem = menu.findItem(R.id.menu_share);
MenuItem deleteItem = menu.findItem(R.id.menu_delete);
shareItem.setVisible((supportedOperations & MediaObject.SUPPORT_SHARE) > 0);
deleteItem.setVisible((supportedOperations & MediaObject.SUPPORT_DELETE) > 0);
}
@Override
public boolean onCreateActionMode(ActionMode mode, Menu menu) {
mSelectionManager.setSelectedUriSource(this);
mActionMode = mode;
MenuInflater inflater = mode.getMenuInflater();
inflater.inflate(R.menu.gallery_multiselect, menu);
MenuItem menuItem = menu.findItem(R.id.menu_share);
mShareActionProvider = (ShareActionProvider) menuItem.getActionProvider();
mShareActionProvider.setOnShareTargetSelectedListener(this);
updateSelectedTitle(mode);
return true;
}
@Override
public void onDestroyActionMode(ActionMode mode) {
// onDestroyActionMode gets called when the share target was selected,
// but apparently before the ArrayList is serialized in the intent
// so we can't clear the old one here.
mSelectedUrisArray = new ArrayList<Uri>();
mSelectionManager.onClearSelection();
mSelectionManager.setSelectedUriSource(null);
mShareActionProvider = null;
mActionMode = null;
}
@Override
public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
updateSelectedTitle(mode);
return false;
}
@Override
public boolean onShareTargetSelected(ShareActionProvider provider, Intent intent) {
mActionMode.finish();
return false;
}
private static class BulkDeleteTask extends AsyncTask<Void, Void, Void> {
private Delegate mDelegate;
private List<Object> mPaths;
public BulkDeleteTask(Delegate delegate, List<Object> paths) {
mDelegate = delegate;
mPaths = paths;
}
@Override
protected Void doInBackground(Void... ignored) {
for (Object path : mPaths) {
mDelegate.deleteItemWithPath(path);
}
return null;
}
}
@Override
public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
switch (item.getItemId()) {
case R.id.menu_delete:
BulkDeleteTask deleteTask = new BulkDeleteTask(mDelegate,
getPathsForSelectedItems());
deleteTask.execute();
mode.finish();
return true;
default:
return false;
}
}
private List<Object> getPathsForSelectedItems() {
List<Object> paths = new ArrayList<Object>();
SparseBooleanArray selected = mDelegate.getSelectedItemPositions();
for (int i = 0; i < selected.size(); i++) {
if (selected.valueAt(i)) {
paths.add(mDelegate.getPathForItemAtPosition(i));
}
}
return paths;
}
}
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