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
17package com.android.documentsui;
18
19import static com.android.documentsui.DocumentsActivity.TAG;
20import static com.android.documentsui.DocumentsActivity.State.ACTION_CREATE;
21import static com.android.documentsui.DocumentsActivity.State.ACTION_MANAGE;
22import static com.android.documentsui.DocumentsActivity.State.MODE_GRID;
23import static com.android.documentsui.DocumentsActivity.State.MODE_LIST;
24import static com.android.documentsui.DocumentsActivity.State.MODE_UNKNOWN;
25import static com.android.documentsui.DocumentsActivity.State.SORT_ORDER_UNKNOWN;
26import static com.android.documentsui.model.DocumentInfo.getCursorInt;
27import static com.android.documentsui.model.DocumentInfo.getCursorLong;
28import static com.android.documentsui.model.DocumentInfo.getCursorString;
29
30import android.app.ActivityManager;
31import android.app.Fragment;
32import android.app.FragmentManager;
33import android.app.FragmentTransaction;
34import android.app.LoaderManager.LoaderCallbacks;
35import android.content.ContentProviderClient;
36import android.content.ContentResolver;
37import android.content.ContentValues;
38import android.content.Context;
39import android.content.Intent;
40import android.content.Loader;
41import android.database.Cursor;
42import android.graphics.Bitmap;
43import android.graphics.Point;
44import android.graphics.drawable.Drawable;
45import android.graphics.drawable.InsetDrawable;
46import android.net.Uri;
47import android.os.AsyncTask;
48import android.os.Bundle;
49import android.os.CancellationSignal;
50import android.os.Parcelable;
51import android.provider.DocumentsContract;
52import android.provider.DocumentsContract.Document;
53import android.text.format.DateUtils;
54import android.text.format.Formatter;
55import android.text.format.Time;
56import android.util.Log;
57import android.util.SparseArray;
58import android.util.SparseBooleanArray;
59import android.view.ActionMode;
60import android.view.LayoutInflater;
61import android.view.Menu;
62import android.view.MenuItem;
63import android.view.View;
64import android.view.ViewGroup;
65import android.widget.AbsListView;
66import android.widget.AbsListView.MultiChoiceModeListener;
67import android.widget.AbsListView.RecyclerListener;
68import android.widget.AdapterView;
69import android.widget.AdapterView.OnItemClickListener;
70import android.widget.BaseAdapter;
71import android.widget.FrameLayout;
72import android.widget.GridView;
73import android.widget.ImageView;
74import android.widget.ListView;
75import android.widget.TextView;
76import android.widget.Toast;
77
78import com.android.documentsui.DocumentsActivity.State;
79import com.android.documentsui.RecentsProvider.StateColumns;
80import com.android.documentsui.model.DocumentInfo;
81import com.android.documentsui.model.RootInfo;
82import com.google.android.collect.Lists;
83
84import java.util.ArrayList;
85import java.util.List;
86import java.util.concurrent.atomic.AtomicInteger;
87
88/**
89 * Display the documents inside a single directory.
90 */
91public class DirectoryFragment extends Fragment {
92
93    private View mEmptyView;
94    private ListView mListView;
95    private GridView mGridView;
96
97    private AbsListView mCurrentView;
98
99    public static final int TYPE_NORMAL = 1;
100    public static final int TYPE_SEARCH = 2;
101    public static final int TYPE_RECENT_OPEN = 3;
102
103    public static final int ANIM_NONE = 1;
104    public static final int ANIM_SIDE = 2;
105    public static final int ANIM_DOWN = 3;
106    public static final int ANIM_UP = 4;
107
108    private int mType = TYPE_NORMAL;
109    private String mStateKey;
110
111    private int mLastMode = MODE_UNKNOWN;
112    private int mLastSortOrder = SORT_ORDER_UNKNOWN;
113    private boolean mLastShowSize = false;
114
115    private boolean mHideGridTitles = false;
116
117    private boolean mSvelteRecents;
118    private Point mThumbSize;
119
120    private DocumentsAdapter mAdapter;
121    private LoaderCallbacks<DirectoryResult> mCallbacks;
122
123    private static final String EXTRA_TYPE = "type";
124    private static final String EXTRA_ROOT = "root";
125    private static final String EXTRA_DOC = "doc";
126    private static final String EXTRA_QUERY = "query";
127    private static final String EXTRA_IGNORE_STATE = "ignoreState";
128
129    private static AtomicInteger sLoaderId = new AtomicInteger(4000);
130
131    private final int mLoaderId = sLoaderId.incrementAndGet();
132
133    public static void showNormal(FragmentManager fm, RootInfo root, DocumentInfo doc, int anim) {
134        show(fm, TYPE_NORMAL, root, doc, null, anim);
135    }
136
137    public static void showSearch(FragmentManager fm, RootInfo root, String query, int anim) {
138        show(fm, TYPE_SEARCH, root, null, query, anim);
139    }
140
141    public static void showRecentsOpen(FragmentManager fm, int anim) {
142        show(fm, TYPE_RECENT_OPEN, null, null, null, anim);
143    }
144
145    private static void show(FragmentManager fm, int type, RootInfo root, DocumentInfo doc,
146            String query, int anim) {
147        final Bundle args = new Bundle();
148        args.putInt(EXTRA_TYPE, type);
149        args.putParcelable(EXTRA_ROOT, root);
150        args.putParcelable(EXTRA_DOC, doc);
151        args.putString(EXTRA_QUERY, query);
152
153        final FragmentTransaction ft = fm.beginTransaction();
154        switch (anim) {
155            case ANIM_SIDE:
156                args.putBoolean(EXTRA_IGNORE_STATE, true);
157                break;
158            case ANIM_DOWN:
159                args.putBoolean(EXTRA_IGNORE_STATE, true);
160                ft.setCustomAnimations(R.animator.dir_down, R.animator.dir_frozen);
161                break;
162            case ANIM_UP:
163                ft.setCustomAnimations(R.animator.dir_frozen, R.animator.dir_up);
164                break;
165        }
166
167        final DirectoryFragment fragment = new DirectoryFragment();
168        fragment.setArguments(args);
169
170        ft.replace(R.id.container_directory, fragment);
171        ft.commitAllowingStateLoss();
172    }
173
174    private static String buildStateKey(RootInfo root, DocumentInfo doc) {
175        final StringBuilder builder = new StringBuilder();
176        builder.append(root != null ? root.authority : "null").append(';');
177        builder.append(root != null ? root.rootId : "null").append(';');
178        builder.append(doc != null ? doc.documentId : "null");
179        return builder.toString();
180    }
181
182    public static DirectoryFragment get(FragmentManager fm) {
183        // TODO: deal with multiple directories shown at once
184        return (DirectoryFragment) fm.findFragmentById(R.id.container_directory);
185    }
186
187    @Override
188    public View onCreateView(
189            LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
190        final Context context = inflater.getContext();
191        final View view = inflater.inflate(R.layout.fragment_directory, container, false);
192
193        mEmptyView = view.findViewById(android.R.id.empty);
194
195        mListView = (ListView) view.findViewById(R.id.list);
196        mListView.setOnItemClickListener(mItemListener);
197        mListView.setMultiChoiceModeListener(mMultiListener);
198        mListView.setRecyclerListener(mRecycleListener);
199
200        mGridView = (GridView) view.findViewById(R.id.grid);
201        mGridView.setOnItemClickListener(mItemListener);
202        mGridView.setMultiChoiceModeListener(mMultiListener);
203        mGridView.setRecyclerListener(mRecycleListener);
204
205        return view;
206    }
207
208    @Override
209    public void onDestroyView() {
210        super.onDestroyView();
211
212        // Cancel any outstanding thumbnail requests
213        final ViewGroup target = (mListView.getAdapter() != null) ? mListView : mGridView;
214        final int count = target.getChildCount();
215        for (int i = 0; i < count; i++) {
216            final View view = target.getChildAt(i);
217            mRecycleListener.onMovedToScrapHeap(view);
218        }
219
220        // Tear down any selection in progress
221        mListView.setChoiceMode(AbsListView.CHOICE_MODE_NONE);
222        mGridView.setChoiceMode(AbsListView.CHOICE_MODE_NONE);
223    }
224
225    @Override
226    public void onActivityCreated(Bundle savedInstanceState) {
227        super.onActivityCreated(savedInstanceState);
228
229        final Context context = getActivity();
230        final State state = getDisplayState(DirectoryFragment.this);
231
232        final RootInfo root = getArguments().getParcelable(EXTRA_ROOT);
233        final DocumentInfo doc = getArguments().getParcelable(EXTRA_DOC);
234
235        mAdapter = new DocumentsAdapter();
236        mType = getArguments().getInt(EXTRA_TYPE);
237        mStateKey = buildStateKey(root, doc);
238
239        if (mType == TYPE_RECENT_OPEN) {
240            // Hide titles when showing recents for picking images/videos
241            mHideGridTitles = MimePredicate.mimeMatches(
242                    MimePredicate.VISUAL_MIMES, state.acceptMimes);
243        } else {
244            mHideGridTitles = (doc != null) && doc.isGridTitlesHidden();
245        }
246
247        final ActivityManager am = (ActivityManager) context.getSystemService(
248                Context.ACTIVITY_SERVICE);
249        mSvelteRecents = am.isLowRamDevice() && (mType == TYPE_RECENT_OPEN);
250
251        mCallbacks = new LoaderCallbacks<DirectoryResult>() {
252            @Override
253            public Loader<DirectoryResult> onCreateLoader(int id, Bundle args) {
254                final String query = getArguments().getString(EXTRA_QUERY);
255
256                Uri contentsUri;
257                switch (mType) {
258                    case TYPE_NORMAL:
259                        contentsUri = DocumentsContract.buildChildDocumentsUri(
260                                doc.authority, doc.documentId);
261                        if (state.action == ACTION_MANAGE) {
262                            contentsUri = DocumentsContract.setManageMode(contentsUri);
263                        }
264                        return new DirectoryLoader(
265                                context, mType, root, doc, contentsUri, state.userSortOrder);
266                    case TYPE_SEARCH:
267                        contentsUri = DocumentsContract.buildSearchDocumentsUri(
268                                root.authority, root.rootId, query);
269                        if (state.action == ACTION_MANAGE) {
270                            contentsUri = DocumentsContract.setManageMode(contentsUri);
271                        }
272                        return new DirectoryLoader(
273                                context, mType, root, doc, contentsUri, state.userSortOrder);
274                    case TYPE_RECENT_OPEN:
275                        final RootsCache roots = DocumentsApplication.getRootsCache(context);
276                        return new RecentLoader(context, roots, state);
277                    default:
278                        throw new IllegalStateException("Unknown type " + mType);
279                }
280            }
281
282            @Override
283            public void onLoadFinished(Loader<DirectoryResult> loader, DirectoryResult result) {
284                if (!isAdded()) return;
285
286                mAdapter.swapResult(result);
287
288                // Push latest state up to UI
289                // TODO: if mode change was racing with us, don't overwrite it
290                if (result.mode != MODE_UNKNOWN) {
291                    state.derivedMode = result.mode;
292                }
293                state.derivedSortOrder = result.sortOrder;
294                ((DocumentsActivity) context).onStateChanged();
295
296                updateDisplayState();
297
298                // When launched into empty recents, show drawer
299                if (mType == TYPE_RECENT_OPEN && mAdapter.isEmpty() && !state.stackTouched) {
300                    ((DocumentsActivity) context).setRootsDrawerOpen(true);
301                }
302
303                // Restore any previous instance state
304                final SparseArray<Parcelable> container = state.dirState.remove(mStateKey);
305                if (container != null && !getArguments().getBoolean(EXTRA_IGNORE_STATE, false)) {
306                    getView().restoreHierarchyState(container);
307                } else if (mLastSortOrder != state.derivedSortOrder) {
308                    mListView.smoothScrollToPosition(0);
309                    mGridView.smoothScrollToPosition(0);
310                }
311
312                mLastSortOrder = state.derivedSortOrder;
313            }
314
315            @Override
316            public void onLoaderReset(Loader<DirectoryResult> loader) {
317                mAdapter.swapResult(null);
318            }
319        };
320
321        // Kick off loader at least once
322        getLoaderManager().restartLoader(mLoaderId, null, mCallbacks);
323
324        updateDisplayState();
325    }
326
327    @Override
328    public void onStop() {
329        super.onStop();
330
331        // Remember last scroll location
332        final SparseArray<Parcelable> container = new SparseArray<Parcelable>();
333        getView().saveHierarchyState(container);
334        final State state = getDisplayState(this);
335        state.dirState.put(mStateKey, container);
336    }
337
338    @Override
339    public void onResume() {
340        super.onResume();
341        updateDisplayState();
342    }
343
344    public void onUserSortOrderChanged() {
345        // Sort order change always triggers reload; we'll trigger state change
346        // on the flip side.
347        getLoaderManager().restartLoader(mLoaderId, null, mCallbacks);
348    }
349
350    public void onUserModeChanged() {
351        final ContentResolver resolver = getActivity().getContentResolver();
352        final State state = getDisplayState(this);
353
354        final RootInfo root = getArguments().getParcelable(EXTRA_ROOT);
355        final DocumentInfo doc = getArguments().getParcelable(EXTRA_DOC);
356
357        if (root != null && doc != null) {
358            final Uri stateUri = RecentsProvider.buildState(
359                    root.authority, root.rootId, doc.documentId);
360            final ContentValues values = new ContentValues();
361            values.put(StateColumns.MODE, state.userMode);
362
363            new AsyncTask<Void, Void, Void>() {
364                @Override
365                protected Void doInBackground(Void... params) {
366                    resolver.insert(stateUri, values);
367                    return null;
368                }
369            }.execute();
370        }
371
372        // Mode change is just visual change; no need to kick loader, and
373        // deliver change event immediately.
374        state.derivedMode = state.userMode;
375        ((DocumentsActivity) getActivity()).onStateChanged();
376
377        updateDisplayState();
378    }
379
380    private void updateDisplayState() {
381        final State state = getDisplayState(this);
382
383        if (mLastMode == state.derivedMode && mLastShowSize == state.showSize) return;
384        mLastMode = state.derivedMode;
385        mLastShowSize = state.showSize;
386
387        mListView.setVisibility(state.derivedMode == MODE_LIST ? View.VISIBLE : View.GONE);
388        mGridView.setVisibility(state.derivedMode == MODE_GRID ? View.VISIBLE : View.GONE);
389
390        final int choiceMode;
391        if (state.allowMultiple) {
392            choiceMode = ListView.CHOICE_MODE_MULTIPLE_MODAL;
393        } else {
394            choiceMode = ListView.CHOICE_MODE_NONE;
395        }
396
397        final int thumbSize;
398        if (state.derivedMode == MODE_GRID) {
399            thumbSize = getResources().getDimensionPixelSize(R.dimen.grid_width);
400            mListView.setAdapter(null);
401            mListView.setChoiceMode(ListView.CHOICE_MODE_NONE);
402            mGridView.setAdapter(mAdapter);
403            mGridView.setColumnWidth(getResources().getDimensionPixelSize(R.dimen.grid_width));
404            mGridView.setNumColumns(GridView.AUTO_FIT);
405            mGridView.setChoiceMode(choiceMode);
406            mCurrentView = mGridView;
407        } else if (state.derivedMode == MODE_LIST) {
408            thumbSize = getResources().getDimensionPixelSize(R.dimen.icon_size);
409            mGridView.setAdapter(null);
410            mGridView.setChoiceMode(ListView.CHOICE_MODE_NONE);
411            mListView.setAdapter(mAdapter);
412            mListView.setChoiceMode(choiceMode);
413            mCurrentView = mListView;
414        } else {
415            throw new IllegalStateException("Unknown state " + state.derivedMode);
416        }
417
418        mThumbSize = new Point(thumbSize, thumbSize);
419    }
420
421    private OnItemClickListener mItemListener = new OnItemClickListener() {
422        @Override
423        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
424            final Cursor cursor = mAdapter.getItem(position);
425            if (cursor != null) {
426                final String docMimeType = getCursorString(cursor, Document.COLUMN_MIME_TYPE);
427                final int docFlags = getCursorInt(cursor, Document.COLUMN_FLAGS);
428                if (isDocumentEnabled(docMimeType, docFlags)) {
429                    final DocumentInfo doc = DocumentInfo.fromDirectoryCursor(cursor);
430                    ((DocumentsActivity) getActivity()).onDocumentPicked(doc);
431                }
432            }
433        }
434    };
435
436    private MultiChoiceModeListener mMultiListener = new MultiChoiceModeListener() {
437        @Override
438        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
439            mode.getMenuInflater().inflate(R.menu.mode_directory, menu);
440            return true;
441        }
442
443        @Override
444        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
445            final State state = getDisplayState(DirectoryFragment.this);
446
447            final MenuItem open = menu.findItem(R.id.menu_open);
448            final MenuItem share = menu.findItem(R.id.menu_share);
449            final MenuItem delete = menu.findItem(R.id.menu_delete);
450
451            final boolean manageMode = state.action == ACTION_MANAGE;
452            open.setVisible(!manageMode);
453            share.setVisible(manageMode);
454            delete.setVisible(manageMode);
455
456            return true;
457        }
458
459        @Override
460        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
461            final SparseBooleanArray checked = mCurrentView.getCheckedItemPositions();
462            final ArrayList<DocumentInfo> docs = Lists.newArrayList();
463            final int size = checked.size();
464            for (int i = 0; i < size; i++) {
465                if (checked.valueAt(i)) {
466                    final Cursor cursor = mAdapter.getItem(checked.keyAt(i));
467                    final DocumentInfo doc = DocumentInfo.fromDirectoryCursor(cursor);
468                    docs.add(doc);
469                }
470            }
471
472            final int id = item.getItemId();
473            if (id == R.id.menu_open) {
474                DocumentsActivity.get(DirectoryFragment.this).onDocumentsPicked(docs);
475                mode.finish();
476                return true;
477
478            } else if (id == R.id.menu_share) {
479                onShareDocuments(docs);
480                mode.finish();
481                return true;
482
483            } else if (id == R.id.menu_delete) {
484                onDeleteDocuments(docs);
485                mode.finish();
486                return true;
487
488            } else {
489                return false;
490            }
491        }
492
493        @Override
494        public void onDestroyActionMode(ActionMode mode) {
495            // ignored
496        }
497
498        @Override
499        public void onItemCheckedStateChanged(
500                ActionMode mode, int position, long id, boolean checked) {
501            if (checked) {
502                // Directories and footer items cannot be checked
503                boolean valid = false;
504
505                final Cursor cursor = mAdapter.getItem(position);
506                if (cursor != null) {
507                    final String docMimeType = getCursorString(cursor, Document.COLUMN_MIME_TYPE);
508                    final int docFlags = getCursorInt(cursor, Document.COLUMN_FLAGS);
509                    if (!Document.MIME_TYPE_DIR.equals(docMimeType)) {
510                        valid = isDocumentEnabled(docMimeType, docFlags);
511                    }
512                }
513
514                if (!valid) {
515                    mCurrentView.setItemChecked(position, false);
516                }
517            }
518
519            mode.setTitle(getResources()
520                    .getString(R.string.mode_selected_count, mCurrentView.getCheckedItemCount()));
521        }
522    };
523
524    private RecyclerListener mRecycleListener = new RecyclerListener() {
525        @Override
526        public void onMovedToScrapHeap(View view) {
527            final ImageView iconThumb = (ImageView) view.findViewById(R.id.icon_thumb);
528            if (iconThumb != null) {
529                final ThumbnailAsyncTask oldTask = (ThumbnailAsyncTask) iconThumb.getTag();
530                if (oldTask != null) {
531                    oldTask.reallyCancel();
532                    iconThumb.setTag(null);
533                }
534            }
535        }
536    };
537
538    private void onShareDocuments(List<DocumentInfo> docs) {
539        Intent intent;
540        if (docs.size() == 1) {
541            final DocumentInfo doc = docs.get(0);
542
543            intent = new Intent(Intent.ACTION_SEND);
544            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
545            intent.addCategory(Intent.CATEGORY_DEFAULT);
546            intent.setType(doc.mimeType);
547            intent.putExtra(Intent.EXTRA_STREAM, doc.derivedUri);
548
549        } else if (docs.size() > 1) {
550            intent = new Intent(Intent.ACTION_SEND_MULTIPLE);
551            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
552            intent.addCategory(Intent.CATEGORY_DEFAULT);
553
554            final ArrayList<String> mimeTypes = Lists.newArrayList();
555            final ArrayList<Uri> uris = Lists.newArrayList();
556            for (DocumentInfo doc : docs) {
557                mimeTypes.add(doc.mimeType);
558                uris.add(doc.derivedUri);
559            }
560
561            intent.setType(findCommonMimeType(mimeTypes));
562            intent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, uris);
563
564        } else {
565            return;
566        }
567
568        intent = Intent.createChooser(intent, getActivity().getText(R.string.share_via));
569        startActivity(intent);
570    }
571
572    private void onDeleteDocuments(List<DocumentInfo> docs) {
573        final Context context = getActivity();
574        final ContentResolver resolver = context.getContentResolver();
575
576        boolean hadTrouble = false;
577        for (DocumentInfo doc : docs) {
578            if (!doc.isDeleteSupported()) {
579                Log.w(TAG, "Skipping " + doc);
580                hadTrouble = true;
581                continue;
582            }
583
584            ContentProviderClient client = null;
585            try {
586                client = DocumentsApplication.acquireUnstableProviderOrThrow(
587                        resolver, doc.derivedUri.getAuthority());
588                DocumentsContract.deleteDocument(client, doc.derivedUri);
589            } catch (Exception e) {
590                Log.w(TAG, "Failed to delete " + doc);
591                hadTrouble = true;
592            } finally {
593                ContentProviderClient.releaseQuietly(client);
594            }
595        }
596
597        if (hadTrouble) {
598            Toast.makeText(context, R.string.toast_failed_delete, Toast.LENGTH_SHORT).show();
599        }
600    }
601
602    private static State getDisplayState(Fragment fragment) {
603        return ((DocumentsActivity) fragment.getActivity()).getDisplayState();
604    }
605
606    private static abstract class Footer {
607        private final int mItemViewType;
608
609        public Footer(int itemViewType) {
610            mItemViewType = itemViewType;
611        }
612
613        public abstract View getView(View convertView, ViewGroup parent);
614
615        public int getItemViewType() {
616            return mItemViewType;
617        }
618    }
619
620    private class LoadingFooter extends Footer {
621        public LoadingFooter() {
622            super(1);
623        }
624
625        @Override
626        public View getView(View convertView, ViewGroup parent) {
627            final Context context = parent.getContext();
628            final State state = getDisplayState(DirectoryFragment.this);
629
630            if (convertView == null) {
631                final LayoutInflater inflater = LayoutInflater.from(context);
632                if (state.derivedMode == MODE_LIST) {
633                    convertView = inflater.inflate(R.layout.item_loading_list, parent, false);
634                } else if (state.derivedMode == MODE_GRID) {
635                    convertView = inflater.inflate(R.layout.item_loading_grid, parent, false);
636                } else {
637                    throw new IllegalStateException();
638                }
639            }
640
641            return convertView;
642        }
643    }
644
645    private class MessageFooter extends Footer {
646        private final int mIcon;
647        private final String mMessage;
648
649        public MessageFooter(int itemViewType, int icon, String message) {
650            super(itemViewType);
651            mIcon = icon;
652            mMessage = message;
653        }
654
655        @Override
656        public View getView(View convertView, ViewGroup parent) {
657            final Context context = parent.getContext();
658            final State state = getDisplayState(DirectoryFragment.this);
659
660            if (convertView == null) {
661                final LayoutInflater inflater = LayoutInflater.from(context);
662                if (state.derivedMode == MODE_LIST) {
663                    convertView = inflater.inflate(R.layout.item_message_list, parent, false);
664                } else if (state.derivedMode == MODE_GRID) {
665                    convertView = inflater.inflate(R.layout.item_message_grid, parent, false);
666                } else {
667                    throw new IllegalStateException();
668                }
669            }
670
671            final ImageView icon = (ImageView) convertView.findViewById(android.R.id.icon);
672            final TextView title = (TextView) convertView.findViewById(android.R.id.title);
673            icon.setImageResource(mIcon);
674            title.setText(mMessage);
675            return convertView;
676        }
677    }
678
679    private class DocumentsAdapter extends BaseAdapter {
680        private Cursor mCursor;
681        private int mCursorCount;
682
683        private List<Footer> mFooters = Lists.newArrayList();
684
685        public void swapResult(DirectoryResult result) {
686            mCursor = result != null ? result.cursor : null;
687            mCursorCount = mCursor != null ? mCursor.getCount() : 0;
688
689            mFooters.clear();
690
691            final Bundle extras = mCursor != null ? mCursor.getExtras() : null;
692            if (extras != null) {
693                final String info = extras.getString(DocumentsContract.EXTRA_INFO);
694                if (info != null) {
695                    mFooters.add(new MessageFooter(2, R.drawable.ic_dialog_info, info));
696                }
697                final String error = extras.getString(DocumentsContract.EXTRA_ERROR);
698                if (error != null) {
699                    mFooters.add(new MessageFooter(3, R.drawable.ic_dialog_alert, error));
700                }
701                if (extras.getBoolean(DocumentsContract.EXTRA_LOADING, false)) {
702                    mFooters.add(new LoadingFooter());
703                }
704            }
705
706            if (result != null && result.exception != null) {
707                mFooters.add(new MessageFooter(
708                        3, R.drawable.ic_dialog_alert, getString(R.string.query_error)));
709            }
710
711            if (isEmpty()) {
712                mEmptyView.setVisibility(View.VISIBLE);
713            } else {
714                mEmptyView.setVisibility(View.GONE);
715            }
716
717            notifyDataSetChanged();
718        }
719
720        @Override
721        public View getView(int position, View convertView, ViewGroup parent) {
722            if (position < mCursorCount) {
723                return getDocumentView(position, convertView, parent);
724            } else {
725                position -= mCursorCount;
726                convertView = mFooters.get(position).getView(convertView, parent);
727                // Only the view itself is disabled; contents inside shouldn't
728                // be dimmed.
729                convertView.setEnabled(false);
730                return convertView;
731            }
732        }
733
734        private View getDocumentView(int position, View convertView, ViewGroup parent) {
735            final Context context = parent.getContext();
736            final State state = getDisplayState(DirectoryFragment.this);
737
738            final DocumentInfo doc = getArguments().getParcelable(EXTRA_DOC);
739
740            final RootsCache roots = DocumentsApplication.getRootsCache(context);
741            final ThumbnailCache thumbs = DocumentsApplication.getThumbnailsCache(
742                    context, mThumbSize);
743
744            if (convertView == null) {
745                final LayoutInflater inflater = LayoutInflater.from(context);
746                if (state.derivedMode == MODE_LIST) {
747                    convertView = inflater.inflate(R.layout.item_doc_list, parent, false);
748                } else if (state.derivedMode == MODE_GRID) {
749                    convertView = inflater.inflate(R.layout.item_doc_grid, parent, false);
750
751                    // Apply padding to grid items
752                    final FrameLayout grid = (FrameLayout) convertView;
753                    final int gridPadding = getResources()
754                            .getDimensionPixelSize(R.dimen.grid_padding);
755
756                    // Tricksy hobbitses! We need to fully clear the drawable so
757                    // the view doesn't clobber the new InsetDrawable callback
758                    // when setting back later.
759                    final Drawable fg = grid.getForeground();
760                    final Drawable bg = grid.getBackground();
761                    grid.setForeground(null);
762                    grid.setBackground(null);
763                    grid.setForeground(new InsetDrawable(fg, gridPadding));
764                    grid.setBackground(new InsetDrawable(bg, gridPadding));
765                } else {
766                    throw new IllegalStateException();
767                }
768            }
769
770            final Cursor cursor = getItem(position);
771
772            final String docAuthority = getCursorString(cursor, RootCursorWrapper.COLUMN_AUTHORITY);
773            final String docRootId = getCursorString(cursor, RootCursorWrapper.COLUMN_ROOT_ID);
774            final String docId = getCursorString(cursor, Document.COLUMN_DOCUMENT_ID);
775            final String docMimeType = getCursorString(cursor, Document.COLUMN_MIME_TYPE);
776            final String docDisplayName = getCursorString(cursor, Document.COLUMN_DISPLAY_NAME);
777            final long docLastModified = getCursorLong(cursor, Document.COLUMN_LAST_MODIFIED);
778            final int docIcon = getCursorInt(cursor, Document.COLUMN_ICON);
779            final int docFlags = getCursorInt(cursor, Document.COLUMN_FLAGS);
780            final String docSummary = getCursorString(cursor, Document.COLUMN_SUMMARY);
781            final long docSize = getCursorLong(cursor, Document.COLUMN_SIZE);
782
783            final View line1 = convertView.findViewById(R.id.line1);
784            final View line2 = convertView.findViewById(R.id.line2);
785
786            final ImageView iconMime = (ImageView) convertView.findViewById(R.id.icon_mime);
787            final ImageView iconThumb = (ImageView) convertView.findViewById(R.id.icon_thumb);
788            final TextView title = (TextView) convertView.findViewById(android.R.id.title);
789            final ImageView icon1 = (ImageView) convertView.findViewById(android.R.id.icon1);
790            final ImageView icon2 = (ImageView) convertView.findViewById(android.R.id.icon2);
791            final TextView summary = (TextView) convertView.findViewById(android.R.id.summary);
792            final TextView date = (TextView) convertView.findViewById(R.id.date);
793            final TextView size = (TextView) convertView.findViewById(R.id.size);
794
795            final ThumbnailAsyncTask oldTask = (ThumbnailAsyncTask) iconThumb.getTag();
796            if (oldTask != null) {
797                oldTask.reallyCancel();
798                iconThumb.setTag(null);
799            }
800
801            iconMime.animate().cancel();
802            iconThumb.animate().cancel();
803
804            final boolean supportsThumbnail = (docFlags & Document.FLAG_SUPPORTS_THUMBNAIL) != 0;
805            final boolean allowThumbnail = (state.derivedMode == MODE_GRID)
806                    || MimePredicate.mimeMatches(MimePredicate.VISUAL_MIMES, docMimeType);
807            final boolean showThumbnail = supportsThumbnail && allowThumbnail && !mSvelteRecents;
808
809            boolean cacheHit = false;
810            if (showThumbnail) {
811                final Uri uri = DocumentsContract.buildDocumentUri(docAuthority, docId);
812                final Bitmap cachedResult = thumbs.get(uri);
813                if (cachedResult != null) {
814                    iconThumb.setImageBitmap(cachedResult);
815                    cacheHit = true;
816                } else {
817                    iconThumb.setImageDrawable(null);
818                    final ThumbnailAsyncTask task = new ThumbnailAsyncTask(
819                            uri, iconMime, iconThumb, mThumbSize);
820                    iconThumb.setTag(task);
821                    task.executeOnExecutor(ProviderExecutor.forAuthority(docAuthority));
822                }
823            }
824
825            // Always throw MIME icon into place, even when a thumbnail is being
826            // loaded in background.
827            if (cacheHit) {
828                iconMime.setAlpha(0f);
829                iconMime.setImageDrawable(null);
830                iconThumb.setAlpha(1f);
831            } else {
832                iconMime.setAlpha(1f);
833                iconThumb.setAlpha(0f);
834                iconThumb.setImageDrawable(null);
835                if (docIcon != 0) {
836                    iconMime.setImageDrawable(
837                            IconUtils.loadPackageIcon(context, docAuthority, docIcon));
838                } else {
839                    iconMime.setImageDrawable(IconUtils.loadMimeIcon(
840                            context, docMimeType, docAuthority, docId, state.derivedMode));
841                }
842            }
843
844            boolean hasLine1 = false;
845            boolean hasLine2 = false;
846
847            final boolean hideTitle = (state.derivedMode == MODE_GRID) && mHideGridTitles;
848            if (!hideTitle) {
849                title.setText(docDisplayName);
850                hasLine1 = true;
851            }
852
853            Drawable iconDrawable = null;
854            if (mType == TYPE_RECENT_OPEN) {
855                // We've already had to enumerate roots before any results can
856                // be shown, so this will never block.
857                final RootInfo root = roots.getRootBlocking(docAuthority, docRootId);
858                iconDrawable = root.loadIcon(context);
859
860                if (summary != null) {
861                    final boolean alwaysShowSummary = getResources()
862                            .getBoolean(R.bool.always_show_summary);
863                    if (alwaysShowSummary) {
864                        summary.setText(root.getDirectoryString());
865                        summary.setVisibility(View.VISIBLE);
866                        hasLine2 = true;
867                    } else {
868                        if (iconDrawable != null && roots.isIconUniqueBlocking(root)) {
869                            // No summary needed if icon speaks for itself
870                            summary.setVisibility(View.INVISIBLE);
871                        } else {
872                            summary.setText(root.getDirectoryString());
873                            summary.setVisibility(View.VISIBLE);
874                            summary.setTextAlignment(TextView.TEXT_ALIGNMENT_TEXT_END);
875                            hasLine2 = true;
876                        }
877                    }
878                }
879            } else {
880                // Directories showing thumbnails in grid mode get a little icon
881                // hint to remind user they're a directory.
882                if (Document.MIME_TYPE_DIR.equals(docMimeType) && state.derivedMode == MODE_GRID
883                        && showThumbnail) {
884                    iconDrawable = context.getResources().getDrawable(R.drawable.ic_root_folder);
885                }
886
887                if (summary != null) {
888                    if (docSummary != null) {
889                        summary.setText(docSummary);
890                        summary.setVisibility(View.VISIBLE);
891                        hasLine2 = true;
892                    } else {
893                        summary.setVisibility(View.INVISIBLE);
894                    }
895                }
896            }
897
898            if (icon1 != null) icon1.setVisibility(View.GONE);
899            if (icon2 != null) icon2.setVisibility(View.GONE);
900
901            if (iconDrawable != null) {
902                if (hasLine1) {
903                    icon1.setVisibility(View.VISIBLE);
904                    icon1.setImageDrawable(iconDrawable);
905                } else {
906                    icon2.setVisibility(View.VISIBLE);
907                    icon2.setImageDrawable(iconDrawable);
908                }
909            }
910
911            if (docLastModified == -1) {
912                date.setText(null);
913            } else {
914                date.setText(formatTime(context, docLastModified));
915                hasLine2 = true;
916            }
917
918            if (state.showSize) {
919                size.setVisibility(View.VISIBLE);
920                if (Document.MIME_TYPE_DIR.equals(docMimeType) || docSize == -1) {
921                    size.setText(null);
922                } else {
923                    size.setText(Formatter.formatFileSize(context, docSize));
924                    hasLine2 = true;
925                }
926            } else {
927                size.setVisibility(View.GONE);
928            }
929
930            if (line1 != null) {
931                line1.setVisibility(hasLine1 ? View.VISIBLE : View.GONE);
932            }
933            if (line2 != null) {
934                line2.setVisibility(hasLine2 ? View.VISIBLE : View.GONE);
935            }
936
937            final boolean enabled = isDocumentEnabled(docMimeType, docFlags);
938            if (enabled) {
939                setEnabledRecursive(convertView, true);
940                iconMime.setAlpha(1f);
941                iconThumb.setAlpha(1f);
942                if (icon1 != null) icon1.setAlpha(1f);
943                if (icon2 != null) icon2.setAlpha(1f);
944            } else {
945                setEnabledRecursive(convertView, false);
946                iconMime.setAlpha(0.5f);
947                iconThumb.setAlpha(0.5f);
948                if (icon1 != null) icon1.setAlpha(0.5f);
949                if (icon2 != null) icon2.setAlpha(0.5f);
950            }
951
952            return convertView;
953        }
954
955        @Override
956        public int getCount() {
957            return mCursorCount + mFooters.size();
958        }
959
960        @Override
961        public Cursor getItem(int position) {
962            if (position < mCursorCount) {
963                mCursor.moveToPosition(position);
964                return mCursor;
965            } else {
966                return null;
967            }
968        }
969
970        @Override
971        public long getItemId(int position) {
972            return position;
973        }
974
975        @Override
976        public int getViewTypeCount() {
977            return 4;
978        }
979
980        @Override
981        public int getItemViewType(int position) {
982            if (position < mCursorCount) {
983                return 0;
984            } else {
985                position -= mCursorCount;
986                return mFooters.get(position).getItemViewType();
987            }
988        }
989    }
990
991    private static class ThumbnailAsyncTask extends AsyncTask<Uri, Void, Bitmap> {
992        private final Uri mUri;
993        private final ImageView mIconMime;
994        private final ImageView mIconThumb;
995        private final Point mThumbSize;
996        private final CancellationSignal mSignal;
997
998        public ThumbnailAsyncTask(
999                Uri uri, ImageView iconMime, ImageView iconThumb, Point thumbSize) {
1000            mUri = uri;
1001            mIconMime = iconMime;
1002            mIconThumb = iconThumb;
1003            mThumbSize = thumbSize;
1004            mSignal = new CancellationSignal();
1005        }
1006
1007        public void reallyCancel() {
1008            cancel(false);
1009            mSignal.cancel();
1010        }
1011
1012        @Override
1013        protected Bitmap doInBackground(Uri... params) {
1014            if (isCancelled()) return null;
1015
1016            final Context context = mIconThumb.getContext();
1017            final ContentResolver resolver = context.getContentResolver();
1018
1019            ContentProviderClient client = null;
1020            Bitmap result = null;
1021            try {
1022                client = DocumentsApplication.acquireUnstableProviderOrThrow(
1023                        resolver, mUri.getAuthority());
1024                result = DocumentsContract.getDocumentThumbnail(client, mUri, mThumbSize, mSignal);
1025                if (result != null) {
1026                    final ThumbnailCache thumbs = DocumentsApplication.getThumbnailsCache(
1027                            context, mThumbSize);
1028                    thumbs.put(mUri, result);
1029                }
1030            } catch (Exception e) {
1031                Log.w(TAG, "Failed to load thumbnail for " + mUri + ": " + e);
1032            } finally {
1033                ContentProviderClient.releaseQuietly(client);
1034            }
1035            return result;
1036        }
1037
1038        @Override
1039        protected void onPostExecute(Bitmap result) {
1040            if (mIconThumb.getTag() == this && result != null) {
1041                mIconThumb.setTag(null);
1042                mIconThumb.setImageBitmap(result);
1043
1044                final float targetAlpha = mIconMime.isEnabled() ? 1f : 0.5f;
1045                mIconMime.setAlpha(targetAlpha);
1046                mIconMime.animate().alpha(0f).start();
1047                mIconThumb.setAlpha(0f);
1048                mIconThumb.animate().alpha(targetAlpha).start();
1049            }
1050        }
1051    }
1052
1053    private static String formatTime(Context context, long when) {
1054        // TODO: DateUtils should make this easier
1055        Time then = new Time();
1056        then.set(when);
1057        Time now = new Time();
1058        now.setToNow();
1059
1060        int flags = DateUtils.FORMAT_NO_NOON | DateUtils.FORMAT_NO_MIDNIGHT
1061                | DateUtils.FORMAT_ABBREV_ALL;
1062
1063        if (then.year != now.year) {
1064            flags |= DateUtils.FORMAT_SHOW_YEAR | DateUtils.FORMAT_SHOW_DATE;
1065        } else if (then.yearDay != now.yearDay) {
1066            flags |= DateUtils.FORMAT_SHOW_DATE;
1067        } else {
1068            flags |= DateUtils.FORMAT_SHOW_TIME;
1069        }
1070
1071        return DateUtils.formatDateTime(context, when, flags);
1072    }
1073
1074    private String findCommonMimeType(List<String> mimeTypes) {
1075        String[] commonType = mimeTypes.get(0).split("/");
1076        if (commonType.length != 2) {
1077            return "*/*";
1078        }
1079
1080        for (int i = 1; i < mimeTypes.size(); i++) {
1081            String[] type = mimeTypes.get(i).split("/");
1082            if (type.length != 2) continue;
1083
1084            if (!commonType[1].equals(type[1])) {
1085                commonType[1] = "*";
1086            }
1087
1088            if (!commonType[0].equals(type[0])) {
1089                commonType[0] = "*";
1090                commonType[1] = "*";
1091                break;
1092            }
1093        }
1094
1095        return commonType[0] + "/" + commonType[1];
1096    }
1097
1098    private void setEnabledRecursive(View v, boolean enabled) {
1099        if (v == null) return;
1100        if (v.isEnabled() == enabled) return;
1101        v.setEnabled(enabled);
1102
1103        if (v instanceof ViewGroup) {
1104            final ViewGroup vg = (ViewGroup) v;
1105            for (int i = vg.getChildCount() - 1; i >= 0; i--) {
1106                setEnabledRecursive(vg.getChildAt(i), enabled);
1107            }
1108        }
1109    }
1110
1111    private boolean isDocumentEnabled(String docMimeType, int docFlags) {
1112        final State state = getDisplayState(DirectoryFragment.this);
1113
1114        // Directories are always enabled
1115        if (Document.MIME_TYPE_DIR.equals(docMimeType)) {
1116            return true;
1117        }
1118
1119        // Read-only files are disabled when creating
1120        if (state.action == ACTION_CREATE && (docFlags & Document.FLAG_SUPPORTS_WRITE) == 0) {
1121            return false;
1122        }
1123
1124        return MimePredicate.mimeMatches(state.acceptMimes, docMimeType);
1125    }
1126}
1127