/*
* 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.documentsui;
import static com.android.documentsui.Shared.DEBUG;
import android.app.Activity;
import android.app.Fragment;
import android.app.FragmentManager;
import android.app.FragmentTransaction;
import android.app.LoaderManager.LoaderCallbacks;
import android.content.Context;
import android.content.Intent;
import android.content.Loader;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.net.Uri;
import android.os.Bundle;
import android.provider.Settings;
import android.support.annotation.Nullable;
import android.text.TextUtils;
import android.text.format.Formatter;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import com.android.documentsui.model.RootInfo;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import java.util.Objects;
/**
* Display list of known storage backend roots.
*/
public class RootsFragment extends Fragment {
private static final String TAG = "RootsFragment";
private static final String EXTRA_INCLUDE_APPS = "includeApps";
private ListView mList;
private RootsAdapter mAdapter;
private LoaderCallbacks<Collection<RootInfo>> mCallbacks;
public static void show(FragmentManager fm, Intent includeApps) {
final Bundle args = new Bundle();
args.putParcelable(EXTRA_INCLUDE_APPS, includeApps);
final RootsFragment fragment = new RootsFragment();
fragment.setArguments(args);
final FragmentTransaction ft = fm.beginTransaction();
ft.replace(R.id.container_roots, fragment);
ft.commitAllowingStateLoss();
}
public static RootsFragment get(FragmentManager fm) {
return (RootsFragment) fm.findFragmentById(R.id.container_roots);
}
@Override
public View onCreateView(
LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
final View view = inflater.inflate(R.layout.fragment_roots, container, false);
mList = (ListView) view.findViewById(R.id.roots_list);
mList.setOnItemClickListener(mItemListener);
mList.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
return view;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
final Context context = getActivity();
final RootsCache roots = DocumentsApplication.getRootsCache(context);
final State state = ((BaseActivity) context).getDisplayState();
mCallbacks = new LoaderCallbacks<Collection<RootInfo>>() {
@Override
public Loader<Collection<RootInfo>> onCreateLoader(int id, Bundle args) {
return new RootsLoader(context, roots, state);
}
@Override
public void onLoadFinished(
Loader<Collection<RootInfo>> loader, Collection<RootInfo> result) {
if (!isAdded()) {
return;
}
Intent handlerAppIntent = getArguments().getParcelable(EXTRA_INCLUDE_APPS);
mAdapter = new RootsAdapter(context, result, handlerAppIntent, state);
mList.setAdapter(mAdapter);
onCurrentRootChanged();
}
@Override
public void onLoaderReset(Loader<Collection<RootInfo>> loader) {
mAdapter = null;
mList.setAdapter(null);
}
};
}
@Override
public void onResume() {
super.onResume();
onDisplayStateChanged();
}
public void onDisplayStateChanged() {
final Context context = getActivity();
final State state = ((BaseActivity) context).getDisplayState();
if (state.action == State.ACTION_GET_CONTENT) {
mList.setOnItemLongClickListener(mItemLongClickListener);
} else {
mList.setOnItemLongClickListener(null);
mList.setLongClickable(false);
}
getLoaderManager().restartLoader(2, null, mCallbacks);
}
public void onCurrentRootChanged() {
if (mAdapter == null) {
return;
}
final RootInfo root = ((BaseActivity) getActivity()).getCurrentRoot();
for (int i = 0; i < mAdapter.getCount(); i++) {
final Object item = mAdapter.getItem(i);
if (item instanceof RootItem) {
final RootInfo testRoot = ((RootItem) item).root;
if (Objects.equals(testRoot, root)) {
mList.setItemChecked(i, true);
mList.setSelection(i);
return;
}
}
}
}
/**
* Attempts to shift focus back to the navigation drawer.
*/
public void requestFocus() {
mList.requestFocus();
}
private void showAppDetails(ResolveInfo ri) {
final Intent intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
intent.setData(Uri.fromParts("package", ri.activityInfo.packageName, null));
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_WHEN_TASK_RESET);
startActivity(intent);
}
private OnItemClickListener mItemListener = new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Item item = mAdapter.getItem(position);
if (item instanceof RootItem) {
BaseActivity activity = BaseActivity.get(RootsFragment.this);
RootInfo newRoot = ((RootItem) item).root;
Metrics.logRootVisited(getActivity(), newRoot);
activity.onRootPicked(newRoot);
} else if (item instanceof AppItem) {
DocumentsActivity activity = DocumentsActivity.get(RootsFragment.this);
ResolveInfo info = ((AppItem) item).info;
Metrics.logAppVisited(getActivity(), info);
activity.onAppPicked(info);
} else if (item instanceof SpacerItem) {
if (DEBUG) Log.d(TAG, "Ignoring click on spacer item.");
} else {
throw new IllegalStateException("Unknown root: " + item);
}
}
};
private OnItemLongClickListener mItemLongClickListener = new OnItemLongClickListener() {
@Override
public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {
final Item item = mAdapter.getItem(position);
if (item instanceof AppItem) {
showAppDetails(((AppItem) item).info);
return true;
} else {
return false;
}
}
};
private static abstract class Item {
private final int mLayoutId;
public Item(int layoutId) {
mLayoutId = layoutId;
}
public View getView(View convertView, ViewGroup parent) {
// Disable recycling views because 1) it's very unlikely a view can be recycled here;
// 2) there is no easy way for us to know with which layout id the convertView was
// inflated; and 3) simplicity is much appreciated at this time.
convertView = LayoutInflater.from(parent.getContext())
.inflate(mLayoutId, parent, false);
bindView(convertView);
return convertView;
}
public abstract void bindView(View convertView);
}
private static class RootItem extends Item {
public final RootInfo root;
public RootItem(RootInfo root) {
super(R.layout.item_root);
this.root = root;
}
@Override
public void bindView(View convertView) {
final ImageView icon = (ImageView) convertView.findViewById(android.R.id.icon);
final TextView title = (TextView) convertView.findViewById(android.R.id.title);
final TextView summary = (TextView) convertView.findViewById(android.R.id.summary);
final Context context = convertView.getContext();
icon.setImageDrawable(root.loadDrawerIcon(context));
title.setText(root.title);
// Show available space if no summary
String summaryText = root.summary;
if (TextUtils.isEmpty(summaryText) && root.availableBytes >= 0) {
summaryText = context.getString(R.string.root_available_bytes,
Formatter.formatFileSize(context, root.availableBytes));
}
summary.setText(summaryText);
summary.setVisibility(TextUtils.isEmpty(summaryText) ? View.GONE : View.VISIBLE);
}
}
private static class SpacerItem extends Item {
public SpacerItem() {
super(R.layout.item_root_spacer);
}
@Override
public void bindView(View convertView) {
// Nothing to bind
}
}
private static class AppItem extends Item {
public final ResolveInfo info;
public AppItem(ResolveInfo info) {
super(R.layout.item_root);
this.info = info;
}
@Override
public void bindView(View convertView) {
final ImageView icon = (ImageView) convertView.findViewById(android.R.id.icon);
final TextView title = (TextView) convertView.findViewById(android.R.id.title);
final TextView summary = (TextView) convertView.findViewById(android.R.id.summary);
final PackageManager pm = convertView.getContext().getPackageManager();
icon.setImageDrawable(info.loadIcon(pm));
title.setText(info.loadLabel(pm));
// TODO: match existing summary behavior from disambig dialog
summary.setVisibility(View.GONE);
}
}
private static class RootsAdapter extends ArrayAdapter<Item> {
/**
* @param handlerAppIntent When not null, apps capable of handling the original
* intent will be included in list of roots (in special section at bottom).
*/
public RootsAdapter(Context context, Collection<RootInfo> roots,
@Nullable Intent handlerAppIntent, State state) {
super(context, 0);
final List<RootItem> libraries = new ArrayList<>();
final List<RootItem> others = new ArrayList<>();
for (final RootInfo root : roots) {
final RootItem item = new RootItem(root);
if (root.isHome() &&
!Shared.shouldShowDocumentsRoot(context, ((Activity) context).getIntent())) {
continue;
} else if (root.isLibrary()) {
if (DEBUG) Log.d(TAG, "Adding " + root + " as library.");
libraries.add(item);
} else {
if (DEBUG) Log.d(TAG, "Adding " + root + " as non-library.");
others.add(item);
}
}
final RootComparator comp = new RootComparator();
Collections.sort(libraries, comp);
Collections.sort(others, comp);
addAll(libraries);
// Only add the spacer if it is actually separating something.
if (!libraries.isEmpty() && !others.isEmpty()) {
add(new SpacerItem());
}
addAll(others);
// Include apps that can handle this intent too.
if (handlerAppIntent != null) {
includeHandlerApps(context, handlerAppIntent);
}
}
/**
* Adds apps capable of handling the original intent will be included
* in list of roots (in special section at bottom).
*/
private void includeHandlerApps(Context context, Intent handlerAppIntent) {
final PackageManager pm = context.getPackageManager();
final List<ResolveInfo> infos = pm.queryIntentActivities(
handlerAppIntent, PackageManager.MATCH_DEFAULT_ONLY);
final List<AppItem> apps = new ArrayList<>();
// Omit ourselves from the list
for (ResolveInfo info : infos) {
if (!context.getPackageName().equals(info.activityInfo.packageName)) {
apps.add(new AppItem(info));
}
}
if (apps.size() > 0) {
add(new SpacerItem());
addAll(apps);
}
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
final Item item = getItem(position);
return item.getView(convertView, parent);
}
@Override
public boolean areAllItemsEnabled() {
return false;
}
@Override
public boolean isEnabled(int position) {
return getItemViewType(position) != 1;
}
@Override
public int getItemViewType(int position) {
final Item item = getItem(position);
if (item instanceof RootItem || item instanceof AppItem) {
return 0;
} else {
return 1;
}
}
@Override
public int getViewTypeCount() {
return 2;
}
}
public static class RootComparator implements Comparator<RootItem> {
@Override
public int compare(RootItem lhs, RootItem rhs) {
return lhs.root.compareTo(rhs.root);
}
}
}