DirectoryFragment.java revision d01571e6d4e1c403534e19142720530d324eac9b 
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
221    @Override
222    public void onActivityCreated(Bundle savedInstanceState) {
223        super.onActivityCreated(savedInstanceState);
224
225        final Context context = getActivity();
226        final State state = getDisplayState(DirectoryFragment.this);
227
228        final RootInfo root = getArguments().getParcelable(EXTRA_ROOT);
229        final DocumentInfo doc = getArguments().getParcelable(EXTRA_DOC);
230
231        mAdapter = new DocumentsAdapter();
232        mType = getArguments().getInt(EXTRA_TYPE);
233        mStateKey = buildStateKey(root, doc);
234
235        if (mType == TYPE_RECENT_OPEN) {
236            // Hide titles when showing recents for picking images/videos
237            mHideGridTitles = MimePredicate.mimeMatches(
238                    MimePredicate.VISUAL_MIMES, state.acceptMimes);
239        } else {
240            mHideGridTitles = (doc != null) && doc.isGridTitlesHidden();
241        }
242
243        final ActivityManager am = (ActivityManager) context.getSystemService(
244                Context.ACTIVITY_SERVICE);
245        mSvelteRecents = am.isLowRamDevice() && (mType == TYPE_RECENT_OPEN);
246
247        mCallbacks = new LoaderCallbacks<DirectoryResult>() {
248            @Override
249            public Loader<DirectoryResult> onCreateLoader(int id, Bundle args) {
250                final String query = getArguments().getString(EXTRA_QUERY);
251
252                Uri contentsUri;
253                switch (mType) {
254                    case TYPE_NORMAL:
255                        contentsUri = DocumentsContract.buildChildDocumentsUri(
256                                doc.authority, doc.documentId);
257                        if (state.action == ACTION_MANAGE) {
258                            contentsUri = DocumentsContract.setManageMode(contentsUri);
259                        }
260                        return new DirectoryLoader(
261                                context, mType, root, doc, contentsUri, state.userSortOrder);
262                    case TYPE_SEARCH:
263                        contentsUri = DocumentsContract.buildSearchDocumentsUri(
264                                root.authority, root.rootId, query);
265                        if (state.action == ACTION_MANAGE) {
266                            contentsUri = DocumentsContract.setManageMode(contentsUri);
267                        }
268                        return new DirectoryLoader(
269                                context, mType, root, doc, contentsUri, state.userSortOrder);
270                    case TYPE_RECENT_OPEN:
271                        final RootsCache roots = DocumentsApplication.getRootsCache(context);
272                        return new RecentLoader(context, roots, state);
273                    default:
274                        throw new IllegalStateException("Unknown type " + mType);
275                }
276            }
277
278            @Override
279            public void onLoadFinished(Loader<DirectoryResult> loader, DirectoryResult result) {
280                if (!isAdded()) return;
281
282                mAdapter.swapResult(result);
283
284                // Push latest state up to UI
285                // TODO: if mode change was racing with us, don't overwrite it
286                if (result.mode != MODE_UNKNOWN) {
287                    state.derivedMode = result.mode;
288                }
289                state.derivedSortOrder = result.sortOrder;
290                ((DocumentsActivity) context).onStateChanged();
291
292                updateDisplayState();
293
294                // Restore any previous instance state
295                final SparseArray<Parcelable> container = state.dirState.remove(mStateKey);
296                if (container != null && !getArguments().getBoolean(EXTRA_IGNORE_STATE, false)) {
297                    getView().restoreHierarchyState(container);
298                } else if (mLastSortOrder != state.derivedSortOrder) {
299                    mListView.smoothScrollToPosition(0);
300                    mGridView.smoothScrollToPosition(0);
301                }
302
303                mLastSortOrder = state.derivedSortOrder;
304            }
305
306            @Override
307            public void onLoaderReset(Loader<DirectoryResult> loader) {
308                mAdapter.swapResult(null);
309            }
310        };
311
312        // Kick off loader at least once
313        getLoaderManager().restartLoader(mLoaderId, null, mCallbacks);
314
315        updateDisplayState();
316    }
317
318    @Override
319    public void onStop() {
320        super.onStop();
321
322        // Remember last scroll location
323        final SparseArray<Parcelable> container = new SparseArray<Parcelable>();
324        getView().saveHierarchyState(container);
325        final State state = getDisplayState(this);
326        state.dirState.put(mStateKey, container);
327    }
328
329    @Override
330    public void onResume() {
331        super.onResume();
332        updateDisplayState();
333    }
334
335    public void onUserSortOrderChanged() {
336        // Sort order change always triggers reload; we'll trigger state change
337        // on the flip side.
338        getLoaderManager().restartLoader(mLoaderId, null, mCallbacks);
339    }
340
341    public void onUserModeChanged() {
342        final ContentResolver resolver = getActivity().getContentResolver();
343        final State state = getDisplayState(this);
344
345        final RootInfo root = getArguments().getParcelable(EXTRA_ROOT);
346        final DocumentInfo doc = getArguments().getParcelable(EXTRA_DOC);
347
348        if (root != null && doc != null) {
349            final Uri stateUri = RecentsProvider.buildState(
350                    root.authority, root.rootId, doc.documentId);
351            final ContentValues values = new ContentValues();
352            values.put(StateColumns.MODE, state.userMode);
353
354            new AsyncTask<Void, Void, Void>() {
355                @Override
356                protected Void doInBackground(Void... params) {
357                    resolver.insert(stateUri, values);
358                    return null;
359                }
360            }.execute();
361        }
362
363        // Mode change is just visual change; no need to kick loader, and
364        // deliver change event immediately.
365        state.derivedMode = state.userMode;
366        ((DocumentsActivity) getActivity()).onStateChanged();
367
368        updateDisplayState();
369    }
370
371    private void updateDisplayState() {
372        final State state = getDisplayState(this);
373
374        if (mLastMode == state.derivedMode && mLastShowSize == state.showSize) return;
375        mLastMode = state.derivedMode;
376        mLastShowSize = state.showSize;
377
378        mListView.setVisibility(state.derivedMode == MODE_LIST ? View.VISIBLE : View.GONE);
379        mGridView.setVisibility(state.derivedMode == MODE_GRID ? View.VISIBLE : View.GONE);
380
381        final int choiceMode;
382        if (state.allowMultiple) {
383            choiceMode = ListView.CHOICE_MODE_MULTIPLE_MODAL;
384        } else {
385            choiceMode = ListView.CHOICE_MODE_NONE;
386        }
387
388        final int thumbSize;
389        if (state.derivedMode == MODE_GRID) {
390            thumbSize = getResources().getDimensionPixelSize(R.dimen.grid_width);
391            mListView.setAdapter(null);
392            mListView.setChoiceMode(ListView.CHOICE_MODE_NONE);
393            mGridView.setAdapter(mAdapter);
394            mGridView.setColumnWidth(getResources().getDimensionPixelSize(R.dimen.grid_width));
395            mGridView.setNumColumns(GridView.AUTO_FIT);
396            mGridView.setChoiceMode(choiceMode);
397            mCurrentView = mGridView;
398        } else if (state.derivedMode == MODE_LIST) {
399            thumbSize = getResources().getDimensionPixelSize(R.dimen.icon_size);
400            mGridView.setAdapter(null);
401            mGridView.setChoiceMode(ListView.CHOICE_MODE_NONE);
402            mListView.setAdapter(mAdapter);
403            mListView.setChoiceMode(choiceMode);
404            mCurrentView = mListView;
405        } else {
406            throw new IllegalStateException("Unknown state " + state.derivedMode);
407        }
408
409        mThumbSize = new Point(thumbSize, thumbSize);
410    }
411
412    private OnItemClickListener mItemListener = new OnItemClickListener() {
413        @Override
414        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
415            final Cursor cursor = mAdapter.getItem(position);
416            if (cursor != null) {
417                final String docMimeType = getCursorString(cursor, Document.COLUMN_MIME_TYPE);
418                final int docFlags = getCursorInt(cursor, Document.COLUMN_FLAGS);
419                if (isDocumentEnabled(docMimeType, docFlags)) {
420                    final DocumentInfo doc = DocumentInfo.fromDirectoryCursor(cursor);
421                    ((DocumentsActivity) getActivity()).onDocumentPicked(doc);
422                }
423            }
424        }
425    };
426
427    private MultiChoiceModeListener mMultiListener = new MultiChoiceModeListener() {
428        @Override
429        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
430            mode.getMenuInflater().inflate(R.menu.mode_directory, menu);
431            return true;
432        }
433
434        @Override
435        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
436            final State state = getDisplayState(DirectoryFragment.this);
437
438            final MenuItem open = menu.findItem(R.id.menu_open);
439            final MenuItem share = menu.findItem(R.id.menu_share);
440            final MenuItem delete = menu.findItem(R.id.menu_delete);
441
442            final boolean manageMode = state.action == ACTION_MANAGE;
443            open.setVisible(!manageMode);
444            share.setVisible(manageMode);
445            delete.setVisible(manageMode);
446
447            return true;
448        }
449
450        @Override
451        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
452            final SparseBooleanArray checked = mCurrentView.getCheckedItemPositions();
453            final ArrayList<DocumentInfo> docs = Lists.newArrayList();
454            final int size = checked.size();
455            for (int i = 0; i < size; i++) {
456                if (checked.valueAt(i)) {
457                    final Cursor cursor = mAdapter.getItem(checked.keyAt(i));
458                    final DocumentInfo doc = DocumentInfo.fromDirectoryCursor(cursor);
459                    docs.add(doc);
460                }
461            }
462
463            final int id = item.getItemId();
464            if (id == R.id.menu_open) {
465                DocumentsActivity.get(DirectoryFragment.this).onDocumentsPicked(docs);
466                mode.finish();
467                return true;
468
469            } else if (id == R.id.menu_share) {
470                onShareDocuments(docs);
471                mode.finish();
472                return true;
473
474            } else if (id == R.id.menu_delete) {
475                onDeleteDocuments(docs);
476                mode.finish();
477                return true;
478
479            } else {
480                return false;
481            }
482        }
483
484        @Override
485        public void onDestroyActionMode(ActionMode mode) {
486            // ignored
487        }
488
489        @Override
490        public void onItemCheckedStateChanged(
491                ActionMode mode, int position, long id, boolean checked) {
492            if (checked) {
493                // Directories and footer items cannot be checked
494                boolean valid = false;
495
496                final Cursor cursor = mAdapter.getItem(position);
497                if (cursor != null) {
498                    final String docMimeType = getCursorString(cursor, Document.COLUMN_MIME_TYPE);
499                    final int docFlags = getCursorInt(cursor, Document.COLUMN_FLAGS);
500                    if (!Document.MIME_TYPE_DIR.equals(docMimeType)) {
501                        valid = isDocumentEnabled(docMimeType, docFlags);
502                    }
503                }
504
505                if (!valid) {
506                    mCurrentView.setItemChecked(position, false);
507                }
508            }
509
510            mode.setTitle(getResources()
511                    .getString(R.string.mode_selected_count, mCurrentView.getCheckedItemCount()));
512        }
513    };
514
515    private RecyclerListener mRecycleListener = new RecyclerListener() {
516        @Override
517        public void onMovedToScrapHeap(View view) {
518            final ImageView iconThumb = (ImageView) view.findViewById(R.id.icon_thumb);
519            if (iconThumb != null) {
520                final ThumbnailAsyncTask oldTask = (ThumbnailAsyncTask) iconThumb.getTag();
521                if (oldTask != null) {
522                    oldTask.reallyCancel();
523                    iconThumb.setTag(null);
524                }
525            }
526        }
527    };
528
529    private void onShareDocuments(List<DocumentInfo> docs) {
530        Intent intent;
531        if (docs.size() == 1) {
532            final DocumentInfo doc = docs.get(0);
533
534            intent = new Intent(Intent.ACTION_SEND);
535            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
536            intent.addCategory(Intent.CATEGORY_DEFAULT);
537            intent.setType(doc.mimeType);
538            intent.putExtra(Intent.EXTRA_STREAM, doc.derivedUri);
539
540        } else if (docs.size() > 1) {
541            intent = new Intent(Intent.ACTION_SEND_MULTIPLE);
542            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
543            intent.addCategory(Intent.CATEGORY_DEFAULT);
544
545            final ArrayList<String> mimeTypes = Lists.newArrayList();
546            final ArrayList<Uri> uris = Lists.newArrayList();
547            for (DocumentInfo doc : docs) {
548                mimeTypes.add(doc.mimeType);
549                uris.add(doc.derivedUri);
550            }
551
552            intent.setType(findCommonMimeType(mimeTypes));
553            intent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, uris);
554
555        } else {
556            return;
557        }
558
559        intent = Intent.createChooser(intent, getActivity().getText(R.string.share_via));
560        startActivity(intent);
561    }
562
563    private void onDeleteDocuments(List<DocumentInfo> docs) {
564        final Context context = getActivity();
565        final ContentResolver resolver = context.getContentResolver();
566
567        boolean hadTrouble = false;
568        for (DocumentInfo doc : docs) {
569            if (!doc.isDeleteSupported()) {
570                Log.w(TAG, "Skipping " + doc);
571                hadTrouble = true;
572                continue;
573            }
574
575            ContentProviderClient client = null;
576            try {
577                client = DocumentsApplication.acquireUnstableProviderOrThrow(
578                        resolver, doc.derivedUri.getAuthority());
579                DocumentsContract.deleteDocument(client, doc.derivedUri);
580            } catch (Exception e) {
581                Log.w(TAG, "Failed to delete " + doc);
582                hadTrouble = true;
583            } finally {
584                ContentProviderClient.releaseQuietly(client);
585            }
586        }
587
588        if (hadTrouble) {
589            Toast.makeText(context, R.string.toast_failed_delete, Toast.LENGTH_SHORT).show();
590        }
591    }
592
593    private static State getDisplayState(Fragment fragment) {
594        return ((DocumentsActivity) fragment.getActivity()).getDisplayState();
595    }
596
597    private static abstract class Footer {
598        private final int mItemViewType;
599
600        public Footer(int itemViewType) {
601            mItemViewType = itemViewType;
602        }
603
604        public abstract View getView(View convertView, ViewGroup parent);
605
606        public int getItemViewType() {
607            return mItemViewType;
608        }
609    }
610
611    private class LoadingFooter extends Footer {
612        public LoadingFooter() {
613            super(1);
614        }
615
616        @Override
617        public View getView(View convertView, ViewGroup parent) {
618            final Context context = parent.getContext();
619            final State state = getDisplayState(DirectoryFragment.this);
620
621            if (convertView == null) {
622                final LayoutInflater inflater = LayoutInflater.from(context);
623                if (state.derivedMode == MODE_LIST) {
624                    convertView = inflater.inflate(R.layout.item_loading_list, parent, false);
625                } else if (state.derivedMode == MODE_GRID) {
626                    convertView = inflater.inflate(R.layout.item_loading_grid, parent, false);
627                } else {
628                    throw new IllegalStateException();
629                }
630            }
631
632            return convertView;
633        }
634    }
635
636    private class MessageFooter extends Footer {
637        private final int mIcon;
638        private final String mMessage;
639
640        public MessageFooter(int itemViewType, int icon, String message) {
641            super(itemViewType);
642            mIcon = icon;
643            mMessage = message;
644        }
645
646        @Override
647        public View getView(View convertView, ViewGroup parent) {
648            final Context context = parent.getContext();
649            final State state = getDisplayState(DirectoryFragment.this);
650
651            if (convertView == null) {
652                final LayoutInflater inflater = LayoutInflater.from(context);
653                if (state.derivedMode == MODE_LIST) {
654                    convertView = inflater.inflate(R.layout.item_message_list, parent, false);
655                } else if (state.derivedMode == MODE_GRID) {
656                    convertView = inflater.inflate(R.layout.item_message_grid, parent, false);
657                } else {
658                    throw new IllegalStateException();
659                }
660            }
661
662            final ImageView icon = (ImageView) convertView.findViewById(android.R.id.icon);
663            final TextView title = (TextView) convertView.findViewById(android.R.id.title);
664            icon.setImageResource(mIcon);
665            title.setText(mMessage);
666            return convertView;
667        }
668    }
669
670    private class DocumentsAdapter extends BaseAdapter {
671        private Cursor mCursor;
672        private int mCursorCount;
673
674        private List<Footer> mFooters = Lists.newArrayList();
675
676        public void swapResult(DirectoryResult result) {
677            mCursor = result != null ? result.cursor : null;
678            mCursorCount = mCursor != null ? mCursor.getCount() : 0;
679
680            mFooters.clear();
681
682            final Bundle extras = mCursor != null ? mCursor.getExtras() : null;
683            if (extras != null) {
684                final String info = extras.getString(DocumentsContract.EXTRA_INFO);
685                if (info != null) {
686                    mFooters.add(new MessageFooter(2, R.drawable.ic_dialog_info, info));
687                }
688                final String error = extras.getString(DocumentsContract.EXTRA_ERROR);
689                if (error != null) {
690                    mFooters.add(new MessageFooter(3, R.drawable.ic_dialog_alert, error));
691                }
692                if (extras.getBoolean(DocumentsContract.EXTRA_LOADING, false)) {
693                    mFooters.add(new LoadingFooter());
694                }
695            }
696
697            if (result != null && result.exception != null) {
698                mFooters.add(new MessageFooter(
699                        3, R.drawable.ic_dialog_alert, getString(R.string.query_error)));
700            }
701
702            if (isEmpty()) {
703                mEmptyView.setVisibility(View.VISIBLE);
704            } else {
705                mEmptyView.setVisibility(View.GONE);
706            }
707
708            notifyDataSetChanged();
709        }
710
711        @Override
712        public View getView(int position, View convertView, ViewGroup parent) {
713            if (position < mCursorCount) {
714                return getDocumentView(position, convertView, parent);
715            } else {
716                position -= mCursorCount;
717                convertView = mFooters.get(position).getView(convertView, parent);
718                // Only the view itself is disabled; contents inside shouldn't
719                // be dimmed.
720                convertView.setEnabled(false);
721                return convertView;
722            }
723        }
724
725        private View getDocumentView(int position, View convertView, ViewGroup parent) {
726            final Context context = parent.getContext();
727            final State state = getDisplayState(DirectoryFragment.this);
728
729            final DocumentInfo doc = getArguments().getParcelable(EXTRA_DOC);
730
731            final RootsCache roots = DocumentsApplication.getRootsCache(context);
732            final ThumbnailCache thumbs = DocumentsApplication.getThumbnailsCache(
733                    context, mThumbSize);
734
735            if (convertView == null) {
736                final LayoutInflater inflater = LayoutInflater.from(context);
737                if (state.derivedMode == MODE_LIST) {
738                    convertView = inflater.inflate(R.layout.item_doc_list, parent, false);
739                } else if (state.derivedMode == MODE_GRID) {
740                    convertView = inflater.inflate(R.layout.item_doc_grid, parent, false);
741
742                    // Apply padding to grid items
743                    final FrameLayout grid = (FrameLayout) convertView;
744                    final int gridPadding = getResources()
745                            .getDimensionPixelSize(R.dimen.grid_padding);
746
747                    // Tricksy hobbitses! We need to fully clear the drawable so
748                    // the view doesn't clobber the new InsetDrawable callback
749                    // when setting back later.
750                    final Drawable fg = grid.getForeground();
751                    final Drawable bg = grid.getBackground();
752                    grid.setForeground(null);
753                    grid.setBackground(null);
754                    grid.setForeground(new InsetDrawable(fg, gridPadding));
755                    grid.setBackground(new InsetDrawable(bg, gridPadding));
756                } else {
757                    throw new IllegalStateException();
758                }
759            }
760
761            final Cursor cursor = getItem(position);
762
763            final String docAuthority = getCursorString(cursor, RootCursorWrapper.COLUMN_AUTHORITY);
764            final String docRootId = getCursorString(cursor, RootCursorWrapper.COLUMN_ROOT_ID);
765            final String docId = getCursorString(cursor, Document.COLUMN_DOCUMENT_ID);
766            final String docMimeType = getCursorString(cursor, Document.COLUMN_MIME_TYPE);
767            final String docDisplayName = getCursorString(cursor, Document.COLUMN_DISPLAY_NAME);
768            final long docLastModified = getCursorLong(cursor, Document.COLUMN_LAST_MODIFIED);
769            final int docIcon = getCursorInt(cursor, Document.COLUMN_ICON);
770            final int docFlags = getCursorInt(cursor, Document.COLUMN_FLAGS);
771            final String docSummary = getCursorString(cursor, Document.COLUMN_SUMMARY);
772            final long docSize = getCursorLong(cursor, Document.COLUMN_SIZE);
773
774            final View line1 = convertView.findViewById(R.id.line1);
775            final View line2 = convertView.findViewById(R.id.line2);
776
777            final ImageView iconMime = (ImageView) convertView.findViewById(R.id.icon_mime);
778            final ImageView iconThumb = (ImageView) convertView.findViewById(R.id.icon_thumb);
779            final TextView title = (TextView) convertView.findViewById(android.R.id.title);
780            final ImageView icon1 = (ImageView) convertView.findViewById(android.R.id.icon1);
781            final ImageView icon2 = (ImageView) convertView.findViewById(android.R.id.icon2);
782            final TextView summary = (TextView) convertView.findViewById(android.R.id.summary);
783            final TextView date = (TextView) convertView.findViewById(R.id.date);
784            final TextView size = (TextView) convertView.findViewById(R.id.size);
785
786            final ThumbnailAsyncTask oldTask = (ThumbnailAsyncTask) iconThumb.getTag();
787            if (oldTask != null) {
788                oldTask.reallyCancel();
789                iconThumb.setTag(null);
790            }
791
792            iconMime.animate().cancel();
793            iconThumb.animate().cancel();
794
795            final boolean supportsThumbnail = (docFlags & Document.FLAG_SUPPORTS_THUMBNAIL) != 0;
796            final boolean allowThumbnail = (state.derivedMode == MODE_GRID)
797                    || MimePredicate.mimeMatches(MimePredicate.VISUAL_MIMES, docMimeType);
798            final boolean showThumbnail = supportsThumbnail && allowThumbnail && !mSvelteRecents;
799
800            boolean cacheHit = false;
801            if (showThumbnail) {
802                final Uri uri = DocumentsContract.buildDocumentUri(docAuthority, docId);
803                final Bitmap cachedResult = thumbs.get(uri);
804                if (cachedResult != null) {
805                    iconThumb.setImageBitmap(cachedResult);
806                    cacheHit = true;
807                } else {
808                    iconThumb.setImageDrawable(null);
809                    final ThumbnailAsyncTask task = new ThumbnailAsyncTask(
810                            uri, iconMime, iconThumb, mThumbSize);
811                    iconThumb.setTag(task);
812                    task.executeOnExecutor(ProviderExecutor.forAuthority(docAuthority));
813                }
814            }
815
816            // Always throw MIME icon into place, even when a thumbnail is being
817            // loaded in background.
818            if (cacheHit) {
819                iconMime.setAlpha(0f);
820                iconMime.setImageDrawable(null);
821                iconThumb.setAlpha(1f);
822            } else {
823                iconMime.setAlpha(1f);
824                iconThumb.setAlpha(0f);
825                iconThumb.setImageDrawable(null);
826                if (docIcon != 0) {
827                    iconMime.setImageDrawable(
828                            IconUtils.loadPackageIcon(context, docAuthority, docIcon));
829                } else {
830                    iconMime.setImageDrawable(IconUtils.loadMimeIcon(
831                            context, docMimeType, docAuthority, docId, state.derivedMode));
832                }
833            }
834
835            boolean hasLine1 = false;
836            boolean hasLine2 = false;
837
838            final boolean hideTitle = (state.derivedMode == MODE_GRID) && mHideGridTitles;
839            if (!hideTitle) {
840                title.setText(docDisplayName);
841                hasLine1 = true;
842            }
843
844            Drawable iconDrawable = null;
845            if (mType == TYPE_RECENT_OPEN) {
846                // We've already had to enumerate roots before any results can
847                // be shown, so this will never block.
848                final RootInfo root = roots.getRootBlocking(docAuthority, docRootId);
849                iconDrawable = root.loadIcon(context);
850
851                if (summary != null) {
852                    final boolean alwaysShowSummary = getResources()
853                            .getBoolean(R.bool.always_show_summary);
854                    if (alwaysShowSummary) {
855                        summary.setText(root.getDirectoryString());
856                        summary.setVisibility(View.VISIBLE);
857                        hasLine2 = true;
858                    } else {
859                        if (iconDrawable != null && roots.isIconUniqueBlocking(root)) {
860                            // No summary needed if icon speaks for itself
861                            summary.setVisibility(View.INVISIBLE);
862                        } else {
863                            summary.setText(root.getDirectoryString());
864                            summary.setVisibility(View.VISIBLE);
865                            summary.setTextAlignment(TextView.TEXT_ALIGNMENT_TEXT_END);
866                            hasLine2 = true;
867                        }
868                    }
869                }
870            } else {
871                // Directories showing thumbnails in grid mode get a little icon
872                // hint to remind user they're a directory.
873                if (Document.MIME_TYPE_DIR.equals(docMimeType) && state.derivedMode == MODE_GRID
874                        && showThumbnail) {
875                    iconDrawable = context.getResources().getDrawable(R.drawable.ic_root_folder);
876                }
877
878                if (summary != null) {
879                    if (docSummary != null) {
880                        summary.setText(docSummary);
881                        summary.setVisibility(View.VISIBLE);
882                        hasLine2 = true;
883                    } else {
884                        summary.setVisibility(View.INVISIBLE);
885                    }
886                }
887            }
888
889            if (icon1 != null) icon1.setVisibility(View.GONE);
890            if (icon2 != null) icon2.setVisibility(View.GONE);
891
892            if (iconDrawable != null) {
893                if (hasLine1) {
894                    icon1.setVisibility(View.VISIBLE);
895                    icon1.setImageDrawable(iconDrawable);
896                } else {
897                    icon2.setVisibility(View.VISIBLE);
898                    icon2.setImageDrawable(iconDrawable);
899                }
900            }
901
902            if (docLastModified == -1) {
903                date.setText(null);
904            } else {
905                date.setText(formatTime(context, docLastModified));
906                hasLine2 = true;
907            }
908
909            if (state.showSize) {
910                size.setVisibility(View.VISIBLE);
911                if (Document.MIME_TYPE_DIR.equals(docMimeType) || docSize == -1) {
912                    size.setText(null);
913                } else {
914                    size.setText(Formatter.formatFileSize(context, docSize));
915                    hasLine2 = true;
916                }
917            } else {
918                size.setVisibility(View.GONE);
919            }
920
921            if (line1 != null) {
922                line1.setVisibility(hasLine1 ? View.VISIBLE : View.GONE);
923            }
924            if (line2 != null) {
925                line2.setVisibility(hasLine2 ? View.VISIBLE : View.GONE);
926            }
927
928            final boolean enabled = isDocumentEnabled(docMimeType, docFlags);
929            if (enabled) {
930                setEnabledRecursive(convertView, true);
931                iconMime.setAlpha(1f);
932                iconThumb.setAlpha(1f);
933                if (icon1 != null) icon1.setAlpha(1f);
934                if (icon2 != null) icon2.setAlpha(1f);
935            } else {
936                setEnabledRecursive(convertView, false);
937                iconMime.setAlpha(0.5f);
938                iconThumb.setAlpha(0.5f);
939                if (icon1 != null) icon1.setAlpha(0.5f);
940                if (icon2 != null) icon2.setAlpha(0.5f);
941            }
942
943            return convertView;
944        }
945
946        @Override
947        public int getCount() {
948            return mCursorCount + mFooters.size();
949        }
950
951        @Override
952        public Cursor getItem(int position) {
953            if (position < mCursorCount) {
954                mCursor.moveToPosition(position);
955                return mCursor;
956            } else {
957                return null;
958            }
959        }
960
961        @Override
962        public long getItemId(int position) {
963            return position;
964        }
965
966        @Override
967        public int getViewTypeCount() {
968            return 4;
969        }
970
971        @Override
972        public int getItemViewType(int position) {
973            if (position < mCursorCount) {
974                return 0;
975            } else {
976                position -= mCursorCount;
977                return mFooters.get(position).getItemViewType();
978            }
979        }
980    }
981
982    private static class ThumbnailAsyncTask extends AsyncTask<Uri, Void, Bitmap> {
983        private final Uri mUri;
984        private final ImageView mIconMime;
985        private final ImageView mIconThumb;
986        private final Point mThumbSize;
987        private final CancellationSignal mSignal;
988
989        public ThumbnailAsyncTask(
990                Uri uri, ImageView iconMime, ImageView iconThumb, Point thumbSize) {
991            mUri = uri;
992            mIconMime = iconMime;
993            mIconThumb = iconThumb;
994            mThumbSize = thumbSize;
995            mSignal = new CancellationSignal();
996        }
997
998        public void reallyCancel() {
999            cancel(false);
1000            mSignal.cancel();
1001        }
1002
1003        @Override
1004        protected Bitmap doInBackground(Uri... params) {
1005            if (isCancelled()) return null;
1006
1007            final Context context = mIconThumb.getContext();
1008            final ContentResolver resolver = context.getContentResolver();
1009
1010            ContentProviderClient client = null;
1011            Bitmap result = null;
1012            try {
1013                client = DocumentsApplication.acquireUnstableProviderOrThrow(
1014                        resolver, mUri.getAuthority());
1015                result = DocumentsContract.getDocumentThumbnail(client, mUri, mThumbSize, mSignal);
1016                if (result != null) {
1017                    final ThumbnailCache thumbs = DocumentsApplication.getThumbnailsCache(
1018                            context, mThumbSize);
1019                    thumbs.put(mUri, result);
1020                }
1021            } catch (Exception e) {
1022                Log.w(TAG, "Failed to load thumbnail for " + mUri + ": " + e);
1023            } finally {
1024                ContentProviderClient.releaseQuietly(client);
1025            }
1026            return result;
1027        }
1028
1029        @Override
1030        protected void onPostExecute(Bitmap result) {
1031            if (mIconThumb.getTag() == this && result != null) {
1032                mIconThumb.setTag(null);
1033                mIconThumb.setImageBitmap(result);
1034
1035                final float targetAlpha = mIconMime.isEnabled() ? 1f : 0.5f;
1036                mIconMime.setAlpha(targetAlpha);
1037                mIconMime.animate().alpha(0f).start();
1038                mIconThumb.setAlpha(0f);
1039                mIconThumb.animate().alpha(targetAlpha).start();
1040            }
1041        }
1042    }
1043
1044    private static String formatTime(Context context, long when) {
1045        // TODO: DateUtils should make this easier
1046        Time then = new Time();
1047        then.set(when);
1048        Time now = new Time();
1049        now.setToNow();
1050
1051        int flags = DateUtils.FORMAT_NO_NOON | DateUtils.FORMAT_NO_MIDNIGHT
1052                | DateUtils.FORMAT_ABBREV_ALL;
1053
1054        if (then.year != now.year) {
1055            flags |= DateUtils.FORMAT_SHOW_YEAR | DateUtils.FORMAT_SHOW_DATE;
1056        } else if (then.yearDay != now.yearDay) {
1057            flags |= DateUtils.FORMAT_SHOW_DATE;
1058        } else {
1059            flags |= DateUtils.FORMAT_SHOW_TIME;
1060        }
1061
1062        return DateUtils.formatDateTime(context, when, flags);
1063    }
1064
1065    private String findCommonMimeType(List<String> mimeTypes) {
1066        String[] commonType = mimeTypes.get(0).split("/");
1067        if (commonType.length != 2) {
1068            return "*/*";
1069        }
1070
1071        for (int i = 1; i < mimeTypes.size(); i++) {
1072            String[] type = mimeTypes.get(i).split("/");
1073            if (type.length != 2) continue;
1074
1075            if (!commonType[1].equals(type[1])) {
1076                commonType[1] = "*";
1077            }
1078
1079            if (!commonType[0].equals(type[0])) {
1080                commonType[0] = "*";
1081                commonType[1] = "*";
1082                break;
1083            }
1084        }
1085
1086        return commonType[0] + "/" + commonType[1];
1087    }
1088
1089    private void setEnabledRecursive(View v, boolean enabled) {
1090        if (v == null) return;
1091        if (v.isEnabled() == enabled) return;
1092        v.setEnabled(enabled);
1093
1094        if (v instanceof ViewGroup) {
1095            final ViewGroup vg = (ViewGroup) v;
1096            for (int i = vg.getChildCount() - 1; i >= 0; i--) {
1097                setEnabledRecursive(vg.getChildAt(i), enabled);
1098            }
1099        }
1100    }
1101
1102    private boolean isDocumentEnabled(String docMimeType, int docFlags) {
1103        final State state = getDisplayState(DirectoryFragment.this);
1104
1105        // Directories are always enabled
1106        if (Document.MIME_TYPE_DIR.equals(docMimeType)) {
1107            return true;
1108        }
1109
1110        // Read-only files are disabled when creating
1111        if (state.action == ACTION_CREATE && (docFlags & Document.FLAG_SUPPORTS_WRITE) == 0) {
1112            return false;
1113        }
1114
1115        return MimePredicate.mimeMatches(state.acceptMimes, docMimeType);
1116    }
1117}
1118