a82c2e24bc
Pull out drawer to give users more context about meaningful places to navigate to. Also fix bug where restored roots weren't being highlighted. Bug: 10852518 Change-Id: Id294f6923477ca4dc505c4b0a21a5bdf8b722cf4
266 lines
9.3 KiB
Java
266 lines
9.3 KiB
Java
/*
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* Copyright (C) 2013 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.documentsui;
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import static com.android.documentsui.DocumentsActivity.TAG;
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import android.app.Fragment;
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import android.app.FragmentManager;
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import android.app.FragmentTransaction;
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import android.app.LoaderManager.LoaderCallbacks;
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import android.content.ContentResolver;
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import android.content.Context;
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import android.content.Loader;
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import android.database.Cursor;
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import android.graphics.drawable.Drawable;
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import android.net.Uri;
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import android.os.Bundle;
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import android.os.CancellationSignal;
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import android.text.Spannable;
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import android.text.SpannableStringBuilder;
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import android.text.TextUtils.TruncateAt;
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import android.text.style.ImageSpan;
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import android.util.Log;
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import android.view.LayoutInflater;
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import android.view.View;
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import android.view.ViewGroup;
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import android.widget.AdapterView;
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import android.widget.AdapterView.OnItemClickListener;
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import android.widget.BaseAdapter;
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import android.widget.ImageView;
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import android.widget.ListView;
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import android.widget.TextView;
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import com.android.documentsui.DocumentsActivity.State;
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import com.android.documentsui.RecentsProvider.RecentColumns;
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import com.android.documentsui.model.DocumentStack;
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import com.android.documentsui.model.DurableUtils;
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import com.android.documentsui.model.RootInfo;
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import com.google.android.collect.Lists;
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import libcore.io.IoUtils;
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import java.io.ByteArrayInputStream;
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import java.io.DataInputStream;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.List;
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/**
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* Display directories where recent creates took place.
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*/
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public class RecentsCreateFragment extends Fragment {
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private View mEmptyView;
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private ListView mListView;
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private DocumentStackAdapter mAdapter;
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private LoaderCallbacks<List<DocumentStack>> mCallbacks;
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private static final int LOADER_RECENTS = 3;
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public static void show(FragmentManager fm) {
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final RecentsCreateFragment fragment = new RecentsCreateFragment();
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final FragmentTransaction ft = fm.beginTransaction();
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ft.replace(R.id.container_directory, fragment);
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ft.commitAllowingStateLoss();
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}
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@Override
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public View onCreateView(
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LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
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final Context context = inflater.getContext();
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final View view = inflater.inflate(R.layout.fragment_directory, container, false);
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mEmptyView = view.findViewById(android.R.id.empty);
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mListView = (ListView) view.findViewById(R.id.list);
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mListView.setOnItemClickListener(mItemListener);
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mAdapter = new DocumentStackAdapter();
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mListView.setAdapter(mAdapter);
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final RootsCache roots = DocumentsApplication.getRootsCache(context);
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final State state = ((DocumentsActivity) getActivity()).getDisplayState();
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mCallbacks = new LoaderCallbacks<List<DocumentStack>>() {
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@Override
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public Loader<List<DocumentStack>> onCreateLoader(int id, Bundle args) {
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return new RecentsCreateLoader(context, roots, state);
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}
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@Override
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public void onLoadFinished(
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Loader<List<DocumentStack>> loader, List<DocumentStack> data) {
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mAdapter.swapStacks(data);
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// When launched into empty recents, show drawer
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if (mAdapter.isEmpty() && !state.stackTouched) {
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((DocumentsActivity) context).setRootsDrawerOpen(true);
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}
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}
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@Override
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public void onLoaderReset(Loader<List<DocumentStack>> loader) {
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mAdapter.swapStacks(null);
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}
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};
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return view;
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}
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@Override
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public void onStart() {
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super.onStart();
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getLoaderManager().restartLoader(LOADER_RECENTS, getArguments(), mCallbacks);
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}
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@Override
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public void onStop() {
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super.onStop();
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getLoaderManager().destroyLoader(LOADER_RECENTS);
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}
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private OnItemClickListener mItemListener = new OnItemClickListener() {
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@Override
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public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
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final DocumentStack stack = mAdapter.getItem(position);
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((DocumentsActivity) getActivity()).onStackPicked(stack);
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}
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};
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public static class RecentsCreateLoader extends UriDerivativeLoader<Uri, List<DocumentStack>> {
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private final RootsCache mRoots;
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private final State mState;
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public RecentsCreateLoader(Context context, RootsCache roots, State state) {
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super(context, RecentsProvider.buildRecent());
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mRoots = roots;
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mState = state;
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}
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@Override
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public List<DocumentStack> loadInBackground(Uri uri, CancellationSignal signal) {
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final Collection<RootInfo> matchingRoots = mRoots.getMatchingRootsBlocking(mState);
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final ArrayList<DocumentStack> result = Lists.newArrayList();
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final ContentResolver resolver = getContext().getContentResolver();
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final Cursor cursor = resolver.query(
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uri, null, null, null, RecentColumns.TIMESTAMP + " DESC", signal);
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try {
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while (cursor != null && cursor.moveToNext()) {
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final byte[] rawStack = cursor.getBlob(
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cursor.getColumnIndex(RecentColumns.STACK));
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try {
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final DocumentStack stack = new DocumentStack();
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DurableUtils.readFromArray(rawStack, stack);
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// Only update root here to avoid spinning up all
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// providers; we update the stack during the actual
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// restore. This also filters away roots that don't
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// match current filter.
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stack.updateRoot(matchingRoots);
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result.add(stack);
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} catch (IOException e) {
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Log.w(TAG, "Failed to resolve stack: " + e);
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}
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}
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} finally {
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IoUtils.closeQuietly(cursor);
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}
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return result;
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}
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}
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private class DocumentStackAdapter extends BaseAdapter {
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private List<DocumentStack> mStacks;
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public DocumentStackAdapter() {
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}
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public void swapStacks(List<DocumentStack> stacks) {
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mStacks = stacks;
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if (isEmpty()) {
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mEmptyView.setVisibility(View.VISIBLE);
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} else {
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mEmptyView.setVisibility(View.GONE);
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}
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notifyDataSetChanged();
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}
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@Override
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public View getView(int position, View convertView, ViewGroup parent) {
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final Context context = parent.getContext();
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if (convertView == null) {
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final LayoutInflater inflater = LayoutInflater.from(context);
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convertView = inflater.inflate(R.layout.item_doc_list, parent, false);
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}
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final ImageView iconMime = (ImageView) convertView.findViewById(R.id.icon_mime);
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final TextView title = (TextView) convertView.findViewById(android.R.id.title);
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final View line2 = convertView.findViewById(R.id.line2);
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final DocumentStack stack = getItem(position);
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iconMime.setImageDrawable(stack.root.loadIcon(context));
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final Drawable crumb = context.getResources()
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.getDrawable(R.drawable.ic_breadcrumb_arrow);
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crumb.setBounds(0, 0, crumb.getIntrinsicWidth(), crumb.getIntrinsicHeight());
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final SpannableStringBuilder builder = new SpannableStringBuilder();
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builder.append(stack.root.title);
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for (int i = stack.size() - 2; i >= 0; i--) {
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appendDrawable(builder, crumb);
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builder.append(stack.get(i).displayName);
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}
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title.setText(builder);
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title.setEllipsize(TruncateAt.MIDDLE);
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if (line2 != null) line2.setVisibility(View.GONE);
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return convertView;
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}
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@Override
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public int getCount() {
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return mStacks != null ? mStacks.size() : 0;
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}
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@Override
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public DocumentStack getItem(int position) {
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return mStacks.get(position);
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}
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@Override
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public long getItemId(int position) {
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return getItem(position).hashCode();
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}
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}
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private static void appendDrawable(SpannableStringBuilder b, Drawable d) {
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final int length = b.length();
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b.append("\u232a");
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b.setSpan(new ImageSpan(d), length, b.length(), Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
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}
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}
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