DirectoryFragment.java revision a9ce049db87259e302e2368d2a4a1c11a94fd831 
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_MANAGE;
21import static com.android.documentsui.DocumentsActivity.State.MODE_GRID;
22import static com.android.documentsui.DocumentsActivity.State.MODE_LIST;
23import static com.android.documentsui.DocumentsActivity.State.MODE_UNKNOWN;
24import static com.android.documentsui.DocumentsActivity.State.SORT_ORDER_UNKNOWN;
25import static com.android.documentsui.model.DocumentInfo.getCursorInt;
26import static com.android.documentsui.model.DocumentInfo.getCursorLong;
27import static com.android.documentsui.model.DocumentInfo.getCursorString;
28
29import android.app.Fragment;
30import android.app.FragmentManager;
31import android.app.FragmentTransaction;
32import android.app.LoaderManager.LoaderCallbacks;
33import android.content.ContentResolver;
34import android.content.ContentValues;
35import android.content.Context;
36import android.content.Intent;
37import android.content.Loader;
38import android.database.Cursor;
39import android.graphics.Bitmap;
40import android.graphics.Point;
41import android.graphics.drawable.Drawable;
42import android.net.Uri;
43import android.os.AsyncTask;
44import android.os.Bundle;
45import android.os.CancellationSignal;
46import android.os.Parcelable;
47import android.provider.DocumentsContract;
48import android.provider.DocumentsContract.Document;
49import android.text.format.DateUtils;
50import android.text.format.Formatter;
51import android.text.format.Time;
52import android.util.Log;
53import android.util.SparseArray;
54import android.util.SparseBooleanArray;
55import android.view.ActionMode;
56import android.view.LayoutInflater;
57import android.view.Menu;
58import android.view.MenuItem;
59import android.view.View;
60import android.view.ViewGroup;
61import android.widget.AbsListView;
62import android.widget.AbsListView.MultiChoiceModeListener;
63import android.widget.AbsListView.RecyclerListener;
64import android.widget.AdapterView;
65import android.widget.AdapterView.OnItemClickListener;
66import android.widget.BaseAdapter;
67import android.widget.GridView;
68import android.widget.ImageView;
69import android.widget.ListView;
70import android.widget.TextView;
71import android.widget.Toast;
72
73import com.android.documentsui.DocumentsActivity.State;
74import com.android.documentsui.RecentsProvider.StateColumns;
75import com.android.documentsui.model.DocumentInfo;
76import com.android.documentsui.model.RootInfo;
77import com.android.internal.util.Predicate;
78import com.google.android.collect.Lists;
79
80import java.util.ArrayList;
81import java.util.List;
82import java.util.concurrent.atomic.AtomicInteger;
83
84/**
85 * Display the documents inside a single directory.
86 */
87public class DirectoryFragment extends Fragment {
88
89    private View mEmptyView;
90    private ListView mListView;
91    private GridView mGridView;
92
93    private AbsListView mCurrentView;
94
95    private Predicate<DocumentInfo> mFilter;
96
97    public static final int TYPE_NORMAL = 1;
98    public static final int TYPE_SEARCH = 2;
99    public static final int TYPE_RECENT_OPEN = 3;
100
101    public static final int ANIM_NONE = 1;
102    public static final int ANIM_SIDE = 2;
103    public static final int ANIM_DOWN = 3;
104    public static final int ANIM_UP = 4;
105
106    private int mType = TYPE_NORMAL;
107    private String mStateKey;
108
109    private int mLastMode = MODE_UNKNOWN;
110    private int mLastSortOrder = SORT_ORDER_UNKNOWN;
111    private boolean mLastShowSize = false;
112
113    private boolean mHideGridTitles = false;
114
115    private Point mThumbSize;
116
117    private DocumentsAdapter mAdapter;
118    private LoaderCallbacks<DirectoryResult> mCallbacks;
119
120    private static final String EXTRA_TYPE = "type";
121    private static final String EXTRA_ROOT = "root";
122    private static final String EXTRA_DOC = "doc";
123    private static final String EXTRA_QUERY = "query";
124    private static final String EXTRA_IGNORE_STATE = "ignoreState";
125
126    private static AtomicInteger sLoaderId = new AtomicInteger(4000);
127
128    private final int mLoaderId = sLoaderId.incrementAndGet();
129
130    public static void showNormal(FragmentManager fm, RootInfo root, DocumentInfo doc, int anim) {
131        show(fm, TYPE_NORMAL, root, doc, null, anim);
132    }
133
134    public static void showSearch(FragmentManager fm, RootInfo root, String query, int anim) {
135        show(fm, TYPE_SEARCH, root, null, query, anim);
136    }
137
138    public static void showRecentsOpen(FragmentManager fm, int anim) {
139        show(fm, TYPE_RECENT_OPEN, null, null, null, anim);
140    }
141
142    private static void show(FragmentManager fm, int type, RootInfo root, DocumentInfo doc,
143            String query, int anim) {
144        final Bundle args = new Bundle();
145        args.putInt(EXTRA_TYPE, type);
146        args.putParcelable(EXTRA_ROOT, root);
147        args.putParcelable(EXTRA_DOC, doc);
148        args.putString(EXTRA_QUERY, query);
149
150        final FragmentTransaction ft = fm.beginTransaction();
151        switch (anim) {
152            case ANIM_SIDE:
153                args.putBoolean(EXTRA_IGNORE_STATE, true);
154                break;
155            case ANIM_DOWN:
156                args.putBoolean(EXTRA_IGNORE_STATE, true);
157                ft.setCustomAnimations(R.animator.dir_down, R.animator.dir_frozen);
158                break;
159            case ANIM_UP:
160                ft.setCustomAnimations(R.animator.dir_frozen, R.animator.dir_up);
161                break;
162        }
163
164        final DirectoryFragment fragment = new DirectoryFragment();
165        fragment.setArguments(args);
166
167        ft.replace(R.id.container_directory, fragment);
168        ft.commitAllowingStateLoss();
169    }
170
171    private static String buildStateKey(RootInfo root, DocumentInfo doc) {
172        final StringBuilder builder = new StringBuilder();
173        builder.append(root != null ? root.authority : "null").append(';');
174        builder.append(root != null ? root.rootId : "null").append(';');
175        builder.append(doc != null ? doc.documentId : "null");
176        return builder.toString();
177    }
178
179    public static DirectoryFragment get(FragmentManager fm) {
180        // TODO: deal with multiple directories shown at once
181        return (DirectoryFragment) fm.findFragmentById(R.id.container_directory);
182    }
183
184    @Override
185    public View onCreateView(
186            LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
187        final Context context = inflater.getContext();
188        final View view = inflater.inflate(R.layout.fragment_directory, container, false);
189
190        mEmptyView = view.findViewById(android.R.id.empty);
191
192        mListView = (ListView) view.findViewById(R.id.list);
193        mListView.setOnItemClickListener(mItemListener);
194        mListView.setMultiChoiceModeListener(mMultiListener);
195        mListView.setRecyclerListener(mRecycleListener);
196
197        mGridView = (GridView) view.findViewById(R.id.grid);
198        mGridView.setOnItemClickListener(mItemListener);
199        mGridView.setMultiChoiceModeListener(mMultiListener);
200        mGridView.setRecyclerListener(mRecycleListener);
201
202        return view;
203    }
204
205    @Override
206    public void onActivityCreated(Bundle savedInstanceState) {
207        super.onActivityCreated(savedInstanceState);
208
209        final Context context = getActivity();
210        final State state = getDisplayState(DirectoryFragment.this);
211
212        final RootInfo root = getArguments().getParcelable(EXTRA_ROOT);
213        final DocumentInfo doc = getArguments().getParcelable(EXTRA_DOC);
214
215        mAdapter = new DocumentsAdapter();
216        mType = getArguments().getInt(EXTRA_TYPE);
217        mStateKey = buildStateKey(root, doc);
218
219        if (mType == TYPE_RECENT_OPEN) {
220            // Hide titles when showing recents for picking images/videos
221            mHideGridTitles = MimePredicate.mimeMatches(
222                    MimePredicate.VISUAL_MIMES, state.acceptMimes);
223        } else {
224            mHideGridTitles = (doc != null) && doc.isGridTitlesHidden();
225        }
226
227        mCallbacks = new LoaderCallbacks<DirectoryResult>() {
228            @Override
229            public Loader<DirectoryResult> onCreateLoader(int id, Bundle args) {
230                final String query = getArguments().getString(EXTRA_QUERY);
231
232                Uri contentsUri;
233                switch (mType) {
234                    case TYPE_NORMAL:
235                        contentsUri = DocumentsContract.buildChildDocumentsUri(
236                                doc.authority, doc.documentId);
237                        if (state.action == ACTION_MANAGE) {
238                            contentsUri = DocumentsContract.setManageMode(contentsUri);
239                        }
240                        return new DirectoryLoader(
241                                context, mType, root, doc, contentsUri, state.userSortOrder);
242                    case TYPE_SEARCH:
243                        contentsUri = DocumentsContract.buildSearchDocumentsUri(
244                                root.authority, root.rootId, query);
245                        if (state.action == ACTION_MANAGE) {
246                            contentsUri = DocumentsContract.setManageMode(contentsUri);
247                        }
248                        return new DirectoryLoader(
249                                context, mType, root, doc, contentsUri, state.userSortOrder);
250                    case TYPE_RECENT_OPEN:
251                        final RootsCache roots = DocumentsApplication.getRootsCache(context);
252                        return new RecentLoader(context, roots, state);
253                    default:
254                        throw new IllegalStateException("Unknown type " + mType);
255                }
256            }
257
258            @Override
259            public void onLoadFinished(Loader<DirectoryResult> loader, DirectoryResult result) {
260                if (!isAdded()) return;
261
262                mAdapter.swapCursor(result.cursor);
263
264                // Push latest state up to UI
265                // TODO: if mode change was racing with us, don't overwrite it
266                if (result.mode != MODE_UNKNOWN) {
267                    state.derivedMode = result.mode;
268                }
269                state.derivedSortOrder = result.sortOrder;
270                ((DocumentsActivity) context).onStateChanged();
271
272                updateDisplayState();
273
274                // Restore any previous instance state
275                final SparseArray<Parcelable> container = state.dirState.remove(mStateKey);
276                if (container != null && !getArguments().getBoolean(EXTRA_IGNORE_STATE, false)) {
277                    getView().restoreHierarchyState(container);
278                } else if (mLastSortOrder != state.derivedSortOrder) {
279                    mListView.smoothScrollToPosition(0);
280                    mGridView.smoothScrollToPosition(0);
281                }
282
283                mLastSortOrder = state.derivedSortOrder;
284            }
285
286            @Override
287            public void onLoaderReset(Loader<DirectoryResult> loader) {
288                mAdapter.swapCursor(null);
289            }
290        };
291
292        // Kick off loader at least once
293        getLoaderManager().restartLoader(mLoaderId, null, mCallbacks);
294
295        updateDisplayState();
296    }
297
298    @Override
299    public void onStop() {
300        super.onStop();
301
302        // Remember last scroll location
303        final SparseArray<Parcelable> container = new SparseArray<Parcelable>();
304        getView().saveHierarchyState(container);
305        final State state = getDisplayState(this);
306        state.dirState.put(mStateKey, container);
307    }
308
309    @Override
310    public void onResume() {
311        super.onResume();
312        updateDisplayState();
313    }
314
315    public void onUserSortOrderChanged() {
316        // Sort order change always triggers reload; we'll trigger state change
317        // on the flip side.
318        getLoaderManager().restartLoader(mLoaderId, null, mCallbacks);
319    }
320
321    public void onUserModeChanged() {
322        final ContentResolver resolver = getActivity().getContentResolver();
323        final State state = getDisplayState(this);
324
325        final RootInfo root = getArguments().getParcelable(EXTRA_ROOT);
326        final DocumentInfo doc = getArguments().getParcelable(EXTRA_DOC);
327
328        if (root != null && doc != null) {
329            final Uri stateUri = RecentsProvider.buildState(
330                    root.authority, root.rootId, doc.documentId);
331            final ContentValues values = new ContentValues();
332            values.put(StateColumns.MODE, state.userMode);
333
334            new AsyncTask<Void, Void, Void>() {
335                @Override
336                protected Void doInBackground(Void... params) {
337                    resolver.insert(stateUri, values);
338                    return null;
339                }
340            }.execute();
341        }
342
343        // Mode change is just visual change; no need to kick loader, and
344        // deliver change event immediately.
345        state.derivedMode = state.userMode;
346        ((DocumentsActivity) getActivity()).onStateChanged();
347
348        updateDisplayState();
349    }
350
351    private void updateDisplayState() {
352        final State state = getDisplayState(this);
353
354        mFilter = new MimePredicate(state.acceptMimes);
355
356        if (mLastMode == state.derivedMode && mLastShowSize == state.showSize) return;
357        mLastMode = state.derivedMode;
358        mLastShowSize = state.showSize;
359
360        mListView.setVisibility(state.derivedMode == MODE_LIST ? View.VISIBLE : View.GONE);
361        mGridView.setVisibility(state.derivedMode == MODE_GRID ? View.VISIBLE : View.GONE);
362
363        final int choiceMode;
364        if (state.allowMultiple) {
365            choiceMode = ListView.CHOICE_MODE_MULTIPLE_MODAL;
366        } else {
367            choiceMode = ListView.CHOICE_MODE_NONE;
368        }
369
370        final int thumbSize;
371        if (state.derivedMode == MODE_GRID) {
372            thumbSize = getResources().getDimensionPixelSize(R.dimen.grid_width);
373            mListView.setAdapter(null);
374            mListView.setChoiceMode(ListView.CHOICE_MODE_NONE);
375            mGridView.setAdapter(mAdapter);
376            mGridView.setColumnWidth(getResources().getDimensionPixelSize(R.dimen.grid_width));
377            mGridView.setNumColumns(GridView.AUTO_FIT);
378            mGridView.setChoiceMode(choiceMode);
379            mCurrentView = mGridView;
380        } else if (state.derivedMode == MODE_LIST) {
381            thumbSize = getResources().getDimensionPixelSize(R.dimen.icon_size);
382            mGridView.setAdapter(null);
383            mGridView.setChoiceMode(ListView.CHOICE_MODE_NONE);
384            mListView.setAdapter(mAdapter);
385            mListView.setChoiceMode(choiceMode);
386            mCurrentView = mListView;
387        } else {
388            throw new IllegalStateException("Unknown state " + state.derivedMode);
389        }
390
391        mThumbSize = new Point(thumbSize, thumbSize);
392    }
393
394    private OnItemClickListener mItemListener = new OnItemClickListener() {
395        @Override
396        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
397            final Cursor cursor = mAdapter.getItem(position);
398            if (cursor != null) {
399                final DocumentInfo doc = DocumentInfo.fromDirectoryCursor(cursor);
400                if (mFilter.apply(doc)) {
401                    ((DocumentsActivity) getActivity()).onDocumentPicked(doc);
402                }
403            }
404        }
405    };
406
407    private MultiChoiceModeListener mMultiListener = new MultiChoiceModeListener() {
408        @Override
409        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
410            mode.getMenuInflater().inflate(R.menu.mode_directory, menu);
411            return true;
412        }
413
414        @Override
415        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
416            final State state = getDisplayState(DirectoryFragment.this);
417
418            final MenuItem open = menu.findItem(R.id.menu_open);
419            final MenuItem share = menu.findItem(R.id.menu_share);
420            final MenuItem delete = menu.findItem(R.id.menu_delete);
421
422            final boolean manageMode = state.action == ACTION_MANAGE;
423            open.setVisible(!manageMode);
424            share.setVisible(manageMode);
425            delete.setVisible(manageMode);
426
427            return true;
428        }
429
430        @Override
431        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
432            final SparseBooleanArray checked = mCurrentView.getCheckedItemPositions();
433            final ArrayList<DocumentInfo> docs = Lists.newArrayList();
434            final int size = checked.size();
435            for (int i = 0; i < size; i++) {
436                if (checked.valueAt(i)) {
437                    final Cursor cursor = mAdapter.getItem(checked.keyAt(i));
438                    final DocumentInfo doc = DocumentInfo.fromDirectoryCursor(cursor);
439                    docs.add(doc);
440                }
441            }
442
443            final int id = item.getItemId();
444            if (id == R.id.menu_open) {
445                DocumentsActivity.get(DirectoryFragment.this).onDocumentsPicked(docs);
446                mode.finish();
447                return true;
448
449            } else if (id == R.id.menu_share) {
450                onShareDocuments(docs);
451                mode.finish();
452                return true;
453
454            } else if (id == R.id.menu_delete) {
455                onDeleteDocuments(docs);
456                mode.finish();
457                return true;
458
459            } else {
460                return false;
461            }
462        }
463
464        @Override
465        public void onDestroyActionMode(ActionMode mode) {
466            // ignored
467        }
468
469        @Override
470        public void onItemCheckedStateChanged(
471                ActionMode mode, int position, long id, boolean checked) {
472            if (checked) {
473                // Directories and footer items cannot be checked
474                boolean valid = false;
475
476                final Cursor cursor = mAdapter.getItem(position);
477                if (cursor != null) {
478                    final String docMimeType = getCursorString(cursor, Document.COLUMN_MIME_TYPE);
479
480                    // Only valid if non-directory matches filter
481                    final State state = getDisplayState(DirectoryFragment.this);
482                    valid = !Document.MIME_TYPE_DIR.equals(docMimeType)
483                            && MimePredicate.mimeMatches(state.acceptMimes, docMimeType);
484                }
485
486                if (!valid) {
487                    mCurrentView.setItemChecked(position, false);
488                }
489            }
490
491            mode.setTitle(getResources()
492                    .getString(R.string.mode_selected_count, mCurrentView.getCheckedItemCount()));
493        }
494    };
495
496    private RecyclerListener mRecycleListener = new RecyclerListener() {
497        @Override
498        public void onMovedToScrapHeap(View view) {
499            final ImageView iconThumb = (ImageView) view.findViewById(R.id.icon_thumb);
500            if (iconThumb != null) {
501                final ThumbnailAsyncTask oldTask = (ThumbnailAsyncTask) iconThumb.getTag();
502                if (oldTask != null) {
503                    oldTask.reallyCancel();
504                    iconThumb.setTag(null);
505                }
506            }
507        }
508    };
509
510    private void onShareDocuments(List<DocumentInfo> docs) {
511        Intent intent;
512        if (docs.size() == 1) {
513            final DocumentInfo doc = docs.get(0);
514
515            intent = new Intent(Intent.ACTION_SEND);
516            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
517            intent.addCategory(Intent.CATEGORY_DEFAULT);
518            intent.setType(doc.mimeType);
519            intent.putExtra(Intent.EXTRA_STREAM, doc.derivedUri);
520
521        } else if (docs.size() > 1) {
522            intent = new Intent(Intent.ACTION_SEND_MULTIPLE);
523            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
524            intent.addCategory(Intent.CATEGORY_DEFAULT);
525
526            final ArrayList<String> mimeTypes = Lists.newArrayList();
527            final ArrayList<Uri> uris = Lists.newArrayList();
528            for (DocumentInfo doc : docs) {
529                mimeTypes.add(doc.mimeType);
530                uris.add(doc.derivedUri);
531            }
532
533            intent.setType(findCommonMimeType(mimeTypes));
534            intent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, uris);
535
536        } else {
537            return;
538        }
539
540        intent = Intent.createChooser(intent, getActivity().getText(R.string.share_via));
541        startActivity(intent);
542    }
543
544    private void onDeleteDocuments(List<DocumentInfo> docs) {
545        final Context context = getActivity();
546        final ContentResolver resolver = context.getContentResolver();
547
548        boolean hadTrouble = false;
549        for (DocumentInfo doc : docs) {
550            if (!doc.isDeleteSupported()) {
551                Log.w(TAG, "Skipping " + doc);
552                hadTrouble = true;
553                continue;
554            }
555
556            if (!DocumentsContract.deleteDocument(resolver, doc.derivedUri)) {
557                Log.w(TAG, "Failed to delete " + doc);
558                hadTrouble = true;
559            }
560        }
561
562        if (hadTrouble) {
563            Toast.makeText(context, R.string.toast_failed_delete, Toast.LENGTH_SHORT).show();
564        }
565    }
566
567    private static State getDisplayState(Fragment fragment) {
568        return ((DocumentsActivity) fragment.getActivity()).getDisplayState();
569    }
570
571    private static abstract class Footer {
572        private final int mItemViewType;
573
574        public Footer(int itemViewType) {
575            mItemViewType = itemViewType;
576        }
577
578        public abstract View getView(View convertView, ViewGroup parent);
579
580        public int getItemViewType() {
581            return mItemViewType;
582        }
583    }
584
585    private class LoadingFooter extends Footer {
586        public LoadingFooter() {
587            super(1);
588        }
589
590        @Override
591        public View getView(View convertView, ViewGroup parent) {
592            final Context context = parent.getContext();
593            final State state = getDisplayState(DirectoryFragment.this);
594
595            if (convertView == null) {
596                final LayoutInflater inflater = LayoutInflater.from(context);
597                if (state.derivedMode == MODE_LIST) {
598                    convertView = inflater.inflate(R.layout.item_loading_list, parent, false);
599                } else if (state.derivedMode == MODE_GRID) {
600                    convertView = inflater.inflate(R.layout.item_loading_grid, parent, false);
601                } else {
602                    throw new IllegalStateException();
603                }
604            }
605
606            return convertView;
607        }
608    }
609
610    private class MessageFooter extends Footer {
611        private final int mIcon;
612        private final String mMessage;
613
614        public MessageFooter(int itemViewType, int icon, String message) {
615            super(itemViewType);
616            mIcon = icon;
617            mMessage = message;
618        }
619
620        @Override
621        public View getView(View convertView, ViewGroup parent) {
622            final Context context = parent.getContext();
623            final State state = getDisplayState(DirectoryFragment.this);
624
625            if (convertView == null) {
626                final LayoutInflater inflater = LayoutInflater.from(context);
627                if (state.derivedMode == MODE_LIST) {
628                    convertView = inflater.inflate(R.layout.item_message_list, parent, false);
629                } else if (state.derivedMode == MODE_GRID) {
630                    convertView = inflater.inflate(R.layout.item_message_grid, parent, false);
631                } else {
632                    throw new IllegalStateException();
633                }
634            }
635
636            final ImageView icon = (ImageView) convertView.findViewById(android.R.id.icon);
637            final TextView title = (TextView) convertView.findViewById(android.R.id.title);
638            icon.setImageResource(mIcon);
639            title.setText(mMessage);
640            return convertView;
641        }
642    }
643
644    private class DocumentsAdapter extends BaseAdapter {
645        private Cursor mCursor;
646        private int mCursorCount;
647
648        private List<Footer> mFooters = Lists.newArrayList();
649
650        public void swapCursor(Cursor cursor) {
651            mCursor = cursor;
652            mCursorCount = cursor != null ? cursor.getCount() : 0;
653
654            mFooters.clear();
655
656            final Bundle extras = cursor != null ? cursor.getExtras() : null;
657            if (extras != null) {
658                final String info = extras.getString(DocumentsContract.EXTRA_INFO);
659                if (info != null) {
660                    mFooters.add(new MessageFooter(2, R.drawable.ic_dialog_alert, info));
661                }
662                final String error = extras.getString(DocumentsContract.EXTRA_ERROR);
663                if (error != null) {
664                    mFooters.add(new MessageFooter(3, R.drawable.ic_dialog_alert, error));
665                }
666                if (extras.getBoolean(DocumentsContract.EXTRA_LOADING, false)) {
667                    mFooters.add(new LoadingFooter());
668                }
669            }
670
671            if (isEmpty()) {
672                mEmptyView.setVisibility(View.VISIBLE);
673            } else {
674                mEmptyView.setVisibility(View.GONE);
675            }
676
677            notifyDataSetChanged();
678        }
679
680        @Override
681        public View getView(int position, View convertView, ViewGroup parent) {
682            if (position < mCursorCount) {
683                return getDocumentView(position, convertView, parent);
684            } else {
685                position -= mCursorCount;
686                convertView = mFooters.get(position).getView(convertView, parent);
687                // Only the view itself is disabled; contents inside shouldn't
688                // be dimmed.
689                convertView.setEnabled(false);
690                return convertView;
691            }
692        }
693
694        private View getDocumentView(int position, View convertView, ViewGroup parent) {
695            final Context context = parent.getContext();
696            final State state = getDisplayState(DirectoryFragment.this);
697
698            final DocumentInfo doc = getArguments().getParcelable(EXTRA_DOC);
699
700            final RootsCache roots = DocumentsApplication.getRootsCache(context);
701            final ThumbnailCache thumbs = DocumentsApplication.getThumbnailsCache(
702                    context, mThumbSize);
703
704            if (convertView == null) {
705                final LayoutInflater inflater = LayoutInflater.from(context);
706                if (state.derivedMode == MODE_LIST) {
707                    convertView = inflater.inflate(R.layout.item_doc_list, parent, false);
708                } else if (state.derivedMode == MODE_GRID) {
709                    convertView = inflater.inflate(R.layout.item_doc_grid, parent, false);
710                } else {
711                    throw new IllegalStateException();
712                }
713            }
714
715            final Cursor cursor = getItem(position);
716
717            final String docAuthority = getCursorString(cursor, RootCursorWrapper.COLUMN_AUTHORITY);
718            final String docRootId = getCursorString(cursor, RootCursorWrapper.COLUMN_ROOT_ID);
719            final String docId = getCursorString(cursor, Document.COLUMN_DOCUMENT_ID);
720            final String docMimeType = getCursorString(cursor, Document.COLUMN_MIME_TYPE);
721            final String docDisplayName = getCursorString(cursor, Document.COLUMN_DISPLAY_NAME);
722            final long docLastModified = getCursorLong(cursor, Document.COLUMN_LAST_MODIFIED);
723            final int docIcon = getCursorInt(cursor, Document.COLUMN_ICON);
724            final int docFlags = getCursorInt(cursor, Document.COLUMN_FLAGS);
725            final String docSummary = getCursorString(cursor, Document.COLUMN_SUMMARY);
726            final long docSize = getCursorLong(cursor, Document.COLUMN_SIZE);
727
728            final View line1 = convertView.findViewById(R.id.line1);
729            final View line2 = convertView.findViewById(R.id.line2);
730
731            final View icon = convertView.findViewById(android.R.id.icon);
732            final ImageView iconMime = (ImageView) convertView.findViewById(R.id.icon_mime);
733            final ImageView iconThumb = (ImageView) convertView.findViewById(R.id.icon_thumb);
734            final TextView title = (TextView) convertView.findViewById(android.R.id.title);
735            final ImageView icon1 = (ImageView) convertView.findViewById(android.R.id.icon1);
736            final ImageView icon2 = (ImageView) convertView.findViewById(android.R.id.icon2);
737            final TextView summary = (TextView) convertView.findViewById(android.R.id.summary);
738            final TextView date = (TextView) convertView.findViewById(R.id.date);
739            final TextView size = (TextView) convertView.findViewById(R.id.size);
740
741            final ThumbnailAsyncTask oldTask = (ThumbnailAsyncTask) iconThumb.getTag();
742            if (oldTask != null) {
743                oldTask.reallyCancel();
744                iconThumb.setTag(null);
745            }
746
747            iconMime.animate().cancel();
748            iconThumb.animate().cancel();
749
750            final boolean supportsThumbnail = (docFlags & Document.FLAG_SUPPORTS_THUMBNAIL) != 0;
751            final boolean allowThumbnail = (state.derivedMode == MODE_GRID)
752                    || MimePredicate.mimeMatches(MimePredicate.VISUAL_MIMES, docMimeType);
753            final boolean showThumbnail = supportsThumbnail && allowThumbnail;
754
755            boolean cacheHit = false;
756            if (showThumbnail) {
757                final Uri uri = DocumentsContract.buildDocumentUri(docAuthority, docId);
758                final Bitmap cachedResult = thumbs.get(uri);
759                if (cachedResult != null) {
760                    iconThumb.setImageBitmap(cachedResult);
761                    cacheHit = true;
762                } else {
763                    iconThumb.setImageDrawable(null);
764                    final ThumbnailAsyncTask task = new ThumbnailAsyncTask(
765                            uri, iconMime, iconThumb, mThumbSize);
766                    iconThumb.setTag(task);
767                    task.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
768                }
769            }
770
771            // Always throw MIME icon into place, even when a thumbnail is being
772            // loaded in background.
773            if (cacheHit) {
774                iconMime.setAlpha(0f);
775                iconThumb.setAlpha(1f);
776            } else {
777                iconMime.setAlpha(1f);
778                iconThumb.setAlpha(0f);
779                if (docIcon != 0) {
780                    iconMime.setImageDrawable(
781                            IconUtils.loadPackageIcon(context, docAuthority, docIcon));
782                } else {
783                    iconMime.setImageDrawable(IconUtils.loadMimeIcon(
784                            context, docMimeType, docAuthority, docId, state.derivedMode));
785                }
786            }
787
788            boolean hasLine1 = false;
789            boolean hasLine2 = false;
790
791            final boolean hideTitle = (state.derivedMode == MODE_GRID) && mHideGridTitles;
792            if (!hideTitle) {
793                title.setText(docDisplayName);
794                hasLine1 = true;
795            }
796
797            Drawable iconDrawable = null;
798            if (mType == TYPE_RECENT_OPEN) {
799                // We've already had to enumerate roots before any results can
800                // be shown, so this will never block.
801                final RootInfo root = roots.getRootBlocking(docAuthority, docRootId);
802                iconDrawable = root.loadIcon(context);
803
804                if (summary != null) {
805                    final boolean alwaysShowSummary = getResources()
806                            .getBoolean(R.bool.always_show_summary);
807                    if (alwaysShowSummary) {
808                        summary.setText(root.getDirectoryString());
809                        summary.setVisibility(View.VISIBLE);
810                        hasLine2 = true;
811                    } else {
812                        if (iconDrawable != null && roots.isIconUniqueBlocking(root)) {
813                            // No summary needed if icon speaks for itself
814                            summary.setVisibility(View.INVISIBLE);
815                        } else {
816                            summary.setText(root.getDirectoryString());
817                            summary.setVisibility(View.VISIBLE);
818                            summary.setTextAlignment(TextView.TEXT_ALIGNMENT_TEXT_END);
819                            hasLine2 = true;
820                        }
821                    }
822                }
823            } else {
824                // Directories showing thumbnails in grid mode get a little icon
825                // hint to remind user they're a directory.
826                if (Document.MIME_TYPE_DIR.equals(docMimeType) && state.derivedMode == MODE_GRID
827                        && showThumbnail) {
828                    iconDrawable = context.getResources().getDrawable(R.drawable.ic_root_folder);
829                }
830
831                if (summary != null) {
832                    if (docSummary != null) {
833                        summary.setText(docSummary);
834                        summary.setVisibility(View.VISIBLE);
835                        hasLine2 = true;
836                    } else {
837                        summary.setVisibility(View.INVISIBLE);
838                    }
839                }
840            }
841
842            if (icon1 != null) icon1.setVisibility(View.GONE);
843            if (icon2 != null) icon2.setVisibility(View.GONE);
844
845            if (iconDrawable != null) {
846                if (hasLine1) {
847                    icon1.setVisibility(View.VISIBLE);
848                    icon1.setImageDrawable(iconDrawable);
849                } else {
850                    icon2.setVisibility(View.VISIBLE);
851                    icon2.setImageDrawable(iconDrawable);
852                }
853            }
854
855            if (docLastModified == -1) {
856                date.setText(null);
857            } else {
858                date.setText(formatTime(context, docLastModified));
859                hasLine2 = true;
860            }
861
862            if (state.showSize) {
863                size.setVisibility(View.VISIBLE);
864                if (Document.MIME_TYPE_DIR.equals(docMimeType) || docSize == -1) {
865                    size.setText(null);
866                } else {
867                    size.setText(Formatter.formatFileSize(context, docSize));
868                    hasLine2 = true;
869                }
870            } else {
871                size.setVisibility(View.GONE);
872            }
873
874            if (line1 != null) {
875                line1.setVisibility(hasLine1 ? View.VISIBLE : View.GONE);
876            }
877            if (line2 != null) {
878                line2.setVisibility(hasLine2 ? View.VISIBLE : View.GONE);
879            }
880
881            final boolean enabled = Document.MIME_TYPE_DIR.equals(docMimeType)
882                    || MimePredicate.mimeMatches(state.acceptMimes, docMimeType);
883            if (enabled) {
884                setEnabledRecursive(convertView, true);
885                icon.setAlpha(1f);
886                if (icon1 != null) icon1.setAlpha(1f);
887                if (icon2 != null) icon2.setAlpha(1f);
888            } else {
889                setEnabledRecursive(convertView, false);
890                icon.setAlpha(0.5f);
891                if (icon1 != null) icon1.setAlpha(0.5f);
892                if (icon2 != null) icon2.setAlpha(0.5f);
893            }
894
895            return convertView;
896        }
897
898        @Override
899        public int getCount() {
900            return mCursorCount + mFooters.size();
901        }
902
903        @Override
904        public Cursor getItem(int position) {
905            if (position < mCursorCount) {
906                mCursor.moveToPosition(position);
907                return mCursor;
908            } else {
909                return null;
910            }
911        }
912
913        @Override
914        public long getItemId(int position) {
915            return position;
916        }
917
918        @Override
919        public int getViewTypeCount() {
920            return 4;
921        }
922
923        @Override
924        public int getItemViewType(int position) {
925            if (position < mCursorCount) {
926                return 0;
927            } else {
928                position -= mCursorCount;
929                return mFooters.get(position).getItemViewType();
930            }
931        }
932    }
933
934    private static class ThumbnailAsyncTask extends AsyncTask<Uri, Void, Bitmap> {
935        private final Uri mUri;
936        private final ImageView mIconMime;
937        private final ImageView mIconThumb;
938        private final Point mThumbSize;
939        private final CancellationSignal mSignal;
940
941        public ThumbnailAsyncTask(
942                Uri uri, ImageView iconMime, ImageView iconThumb, Point thumbSize) {
943            mUri = uri;
944            mIconMime = iconMime;
945            mIconThumb = iconThumb;
946            mThumbSize = thumbSize;
947            mSignal = new CancellationSignal();
948        }
949
950        public void reallyCancel() {
951            cancel(false);
952            mSignal.cancel();
953        }
954
955        @Override
956        protected Bitmap doInBackground(Uri... params) {
957            final Context context = mIconThumb.getContext();
958
959            Bitmap result = null;
960            try {
961                // TODO: switch to using unstable provider
962                result = DocumentsContract.getDocumentThumbnail(
963                        context.getContentResolver(), mUri, mThumbSize, mSignal);
964                if (result != null) {
965                    final ThumbnailCache thumbs = DocumentsApplication.getThumbnailsCache(
966                            context, mThumbSize);
967                    thumbs.put(mUri, result);
968                }
969            } catch (Exception e) {
970                Log.w(TAG, "Failed to load thumbnail: " + e);
971            }
972            return result;
973        }
974
975        @Override
976        protected void onPostExecute(Bitmap result) {
977            if (mIconThumb.getTag() == this && result != null) {
978                mIconThumb.setTag(null);
979                mIconThumb.setImageBitmap(result);
980
981                mIconMime.setAlpha(1f);
982                mIconMime.animate().alpha(0f).start();
983                mIconThumb.setAlpha(0f);
984                mIconThumb.animate().alpha(1f).start();
985            }
986        }
987    }
988
989    private static String formatTime(Context context, long when) {
990        // TODO: DateUtils should make this easier
991        Time then = new Time();
992        then.set(when);
993        Time now = new Time();
994        now.setToNow();
995
996        int flags = DateUtils.FORMAT_NO_NOON | DateUtils.FORMAT_NO_MIDNIGHT
997                | DateUtils.FORMAT_ABBREV_ALL;
998
999        if (then.year != now.year) {
1000            flags |= DateUtils.FORMAT_SHOW_YEAR | DateUtils.FORMAT_SHOW_DATE;
1001        } else if (then.yearDay != now.yearDay) {
1002            flags |= DateUtils.FORMAT_SHOW_DATE;
1003        } else {
1004            flags |= DateUtils.FORMAT_SHOW_TIME;
1005        }
1006
1007        return DateUtils.formatDateTime(context, when, flags);
1008    }
1009
1010    private String findCommonMimeType(List<String> mimeTypes) {
1011        String[] commonType = mimeTypes.get(0).split("/");
1012        if (commonType.length != 2) {
1013            return "*/*";
1014        }
1015
1016        for (int i = 1; i < mimeTypes.size(); i++) {
1017            String[] type = mimeTypes.get(i).split("/");
1018            if (type.length != 2) continue;
1019
1020            if (!commonType[1].equals(type[1])) {
1021                commonType[1] = "*";
1022            }
1023
1024            if (!commonType[0].equals(type[0])) {
1025                commonType[0] = "*";
1026                commonType[1] = "*";
1027                break;
1028            }
1029        }
1030
1031        return commonType[0] + "/" + commonType[1];
1032    }
1033
1034    private void setEnabledRecursive(View v, boolean enabled) {
1035        if (v == null) return;
1036        if (v.isEnabled() == enabled) return;
1037        v.setEnabled(enabled);
1038
1039        if (v instanceof ViewGroup) {
1040            final ViewGroup vg = (ViewGroup) v;
1041            for (int i = vg.getChildCount() - 1; i >= 0; i--) {
1042                setEnabledRecursive(vg.getChildAt(i), enabled);
1043            }
1044        }
1045    }
1046}
1047