DirectoryFragment.java revision 33819318f61224cdda45e5e9a70dc9cdb9f33911 
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.OperationCanceledException;
51import android.os.Parcelable;
52import android.provider.DocumentsContract;
53import android.provider.DocumentsContract.Document;
54import android.text.format.DateUtils;
55import android.text.format.Formatter;
56import android.text.format.Time;
57import android.util.Log;
58import android.util.SparseArray;
59import android.util.SparseBooleanArray;
60import android.view.ActionMode;
61import android.view.LayoutInflater;
62import android.view.Menu;
63import android.view.MenuItem;
64import android.view.View;
65import android.view.ViewGroup;
66import android.widget.AbsListView;
67import android.widget.AbsListView.MultiChoiceModeListener;
68import android.widget.AbsListView.RecyclerListener;
69import android.widget.AdapterView;
70import android.widget.AdapterView.OnItemClickListener;
71import android.widget.BaseAdapter;
72import android.widget.FrameLayout;
73import android.widget.GridView;
74import android.widget.ImageView;
75import android.widget.ListView;
76import android.widget.TextView;
77import android.widget.Toast;
78
79import com.android.documentsui.DocumentsActivity.State;
80import com.android.documentsui.ProviderExecutor.Preemptable;
81import com.android.documentsui.RecentsProvider.StateColumns;
82import com.android.documentsui.model.DocumentInfo;
83import com.android.documentsui.model.RootInfo;
84import com.google.android.collect.Lists;
85
86import java.util.ArrayList;
87import java.util.List;
88
89/**
90 * Display the documents inside a single directory.
91 */
92public class DirectoryFragment extends Fragment {
93
94    private View mEmptyView;
95    private ListView mListView;
96    private GridView mGridView;
97
98    private AbsListView mCurrentView;
99
100    public static final int TYPE_NORMAL = 1;
101    public static final int TYPE_SEARCH = 2;
102    public static final int TYPE_RECENT_OPEN = 3;
103
104    public static final int ANIM_NONE = 1;
105    public static final int ANIM_SIDE = 2;
106    public static final int ANIM_DOWN = 3;
107    public static final int ANIM_UP = 4;
108
109    private int mType = TYPE_NORMAL;
110    private String mStateKey;
111
112    private int mLastMode = MODE_UNKNOWN;
113    private int mLastSortOrder = SORT_ORDER_UNKNOWN;
114    private boolean mLastShowSize = false;
115
116    private boolean mHideGridTitles = false;
117
118    private boolean mSvelteRecents;
119    private Point mThumbSize;
120
121    private DocumentsAdapter mAdapter;
122    private LoaderCallbacks<DirectoryResult> mCallbacks;
123
124    private static final String EXTRA_TYPE = "type";
125    private static final String EXTRA_ROOT = "root";
126    private static final String EXTRA_DOC = "doc";
127    private static final String EXTRA_QUERY = "query";
128    private static final String EXTRA_IGNORE_STATE = "ignoreState";
129
130    private final int mLoaderId = 42;
131
132    public static void showNormal(FragmentManager fm, RootInfo root, DocumentInfo doc, int anim) {
133        show(fm, TYPE_NORMAL, root, doc, null, anim);
134    }
135
136    public static void showSearch(FragmentManager fm, RootInfo root, String query, int anim) {
137        show(fm, TYPE_SEARCH, root, null, query, anim);
138    }
139
140    public static void showRecentsOpen(FragmentManager fm, int anim) {
141        show(fm, TYPE_RECENT_OPEN, null, null, null, anim);
142    }
143
144    private static void show(FragmentManager fm, int type, RootInfo root, DocumentInfo doc,
145            String query, int anim) {
146        final Bundle args = new Bundle();
147        args.putInt(EXTRA_TYPE, type);
148        args.putParcelable(EXTRA_ROOT, root);
149        args.putParcelable(EXTRA_DOC, doc);
150        args.putString(EXTRA_QUERY, query);
151
152        final FragmentTransaction ft = fm.beginTransaction();
153        switch (anim) {
154            case ANIM_SIDE:
155                args.putBoolean(EXTRA_IGNORE_STATE, true);
156                break;
157            case ANIM_DOWN:
158                args.putBoolean(EXTRA_IGNORE_STATE, true);
159                ft.setCustomAnimations(R.animator.dir_down, R.animator.dir_frozen);
160                break;
161            case ANIM_UP:
162                ft.setCustomAnimations(R.animator.dir_frozen, R.animator.dir_up);
163                break;
164        }
165
166        final DirectoryFragment fragment = new DirectoryFragment();
167        fragment.setArguments(args);
168
169        ft.replace(R.id.container_directory, fragment);
170        ft.commitAllowingStateLoss();
171    }
172
173    private static String buildStateKey(RootInfo root, DocumentInfo doc) {
174        final StringBuilder builder = new StringBuilder();
175        builder.append(root != null ? root.authority : "null").append(';');
176        builder.append(root != null ? root.rootId : "null").append(';');
177        builder.append(doc != null ? doc.documentId : "null");
178        return builder.toString();
179    }
180
181    public static DirectoryFragment get(FragmentManager fm) {
182        // TODO: deal with multiple directories shown at once
183        return (DirectoryFragment) fm.findFragmentById(R.id.container_directory);
184    }
185
186    @Override
187    public View onCreateView(
188            LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
189        final Context context = inflater.getContext();
190        final View view = inflater.inflate(R.layout.fragment_directory, container, false);
191
192        mEmptyView = view.findViewById(android.R.id.empty);
193
194        mListView = (ListView) view.findViewById(R.id.list);
195        mListView.setOnItemClickListener(mItemListener);
196        mListView.setMultiChoiceModeListener(mMultiListener);
197        mListView.setRecyclerListener(mRecycleListener);
198
199        mGridView = (GridView) view.findViewById(R.id.grid);
200        mGridView.setOnItemClickListener(mItemListener);
201        mGridView.setMultiChoiceModeListener(mMultiListener);
202        mGridView.setRecyclerListener(mRecycleListener);
203
204        return view;
205    }
206
207    @Override
208    public void onDestroyView() {
209        super.onDestroyView();
210
211        // Cancel any outstanding thumbnail requests
212        final ViewGroup target = (mListView.getAdapter() != null) ? mListView : mGridView;
213        final int count = target.getChildCount();
214        for (int i = 0; i < count; i++) {
215            final View view = target.getChildAt(i);
216            mRecycleListener.onMovedToScrapHeap(view);
217        }
218
219        // Tear down any selection in progress
220        mListView.setChoiceMode(AbsListView.CHOICE_MODE_NONE);
221        mGridView.setChoiceMode(AbsListView.CHOICE_MODE_NONE);
222    }
223
224    @Override
225    public void onActivityCreated(Bundle savedInstanceState) {
226        super.onActivityCreated(savedInstanceState);
227
228        final Context context = getActivity();
229        final State state = getDisplayState(DirectoryFragment.this);
230
231        final RootInfo root = getArguments().getParcelable(EXTRA_ROOT);
232        final DocumentInfo doc = getArguments().getParcelable(EXTRA_DOC);
233
234        mAdapter = new DocumentsAdapter();
235        mType = getArguments().getInt(EXTRA_TYPE);
236        mStateKey = buildStateKey(root, doc);
237
238        if (mType == TYPE_RECENT_OPEN) {
239            // Hide titles when showing recents for picking images/videos
240            mHideGridTitles = MimePredicate.mimeMatches(
241                    MimePredicate.VISUAL_MIMES, state.acceptMimes);
242        } else {
243            mHideGridTitles = (doc != null) && doc.isGridTitlesHidden();
244        }
245
246        final ActivityManager am = (ActivityManager) context.getSystemService(
247                Context.ACTIVITY_SERVICE);
248        mSvelteRecents = am.isLowRamDevice() && (mType == TYPE_RECENT_OPEN);
249
250        mCallbacks = new LoaderCallbacks<DirectoryResult>() {
251            @Override
252            public Loader<DirectoryResult> onCreateLoader(int id, Bundle args) {
253                final String query = getArguments().getString(EXTRA_QUERY);
254
255                Uri contentsUri;
256                switch (mType) {
257                    case TYPE_NORMAL:
258                        contentsUri = DocumentsContract.buildChildDocumentsUri(
259                                doc.authority, doc.documentId);
260                        if (state.action == ACTION_MANAGE) {
261                            contentsUri = DocumentsContract.setManageMode(contentsUri);
262                        }
263                        return new DirectoryLoader(
264                                context, mType, root, doc, contentsUri, state.userSortOrder);
265                    case TYPE_SEARCH:
266                        contentsUri = DocumentsContract.buildSearchDocumentsUri(
267                                root.authority, root.rootId, query);
268                        if (state.action == ACTION_MANAGE) {
269                            contentsUri = DocumentsContract.setManageMode(contentsUri);
270                        }
271                        return new DirectoryLoader(
272                                context, mType, root, doc, contentsUri, state.userSortOrder);
273                    case TYPE_RECENT_OPEN:
274                        final RootsCache roots = DocumentsApplication.getRootsCache(context);
275                        return new RecentLoader(context, roots, state);
276                    default:
277                        throw new IllegalStateException("Unknown type " + mType);
278                }
279            }
280
281            @Override
282            public void onLoadFinished(Loader<DirectoryResult> loader, DirectoryResult result) {
283                if (!isAdded()) return;
284
285                mAdapter.swapResult(result);
286
287                // Push latest state up to UI
288                // TODO: if mode change was racing with us, don't overwrite it
289                if (result.mode != MODE_UNKNOWN) {
290                    state.derivedMode = result.mode;
291                }
292                state.derivedSortOrder = result.sortOrder;
293                ((DocumentsActivity) context).onStateChanged();
294
295                updateDisplayState();
296
297                // When launched into empty recents, show drawer
298                if (mType == TYPE_RECENT_OPEN && mAdapter.isEmpty() && !state.stackTouched) {
299                    ((DocumentsActivity) context).setRootsDrawerOpen(true);
300                }
301
302                // Restore any previous instance state
303                final SparseArray<Parcelable> container = state.dirState.remove(mStateKey);
304                if (container != null && !getArguments().getBoolean(EXTRA_IGNORE_STATE, false)) {
305                    getView().restoreHierarchyState(container);
306                } else if (mLastSortOrder != state.derivedSortOrder) {
307                    mListView.smoothScrollToPosition(0);
308                    mGridView.smoothScrollToPosition(0);
309                }
310
311                mLastSortOrder = state.derivedSortOrder;
312            }
313
314            @Override
315            public void onLoaderReset(Loader<DirectoryResult> loader) {
316                mAdapter.swapResult(null);
317            }
318        };
319
320        // Kick off loader at least once
321        getLoaderManager().restartLoader(mLoaderId, null, mCallbacks);
322
323        updateDisplayState();
324    }
325
326    @Override
327    public void onStop() {
328        super.onStop();
329
330        // Remember last scroll location
331        final SparseArray<Parcelable> container = new SparseArray<Parcelable>();
332        getView().saveHierarchyState(container);
333        final State state = getDisplayState(this);
334        state.dirState.put(mStateKey, container);
335    }
336
337    @Override
338    public void onResume() {
339        super.onResume();
340        updateDisplayState();
341    }
342
343    public void onUserSortOrderChanged() {
344        // Sort order change always triggers reload; we'll trigger state change
345        // on the flip side.
346        getLoaderManager().restartLoader(mLoaderId, null, mCallbacks);
347    }
348
349    public void onUserModeChanged() {
350        final ContentResolver resolver = getActivity().getContentResolver();
351        final State state = getDisplayState(this);
352
353        final RootInfo root = getArguments().getParcelable(EXTRA_ROOT);
354        final DocumentInfo doc = getArguments().getParcelable(EXTRA_DOC);
355
356        if (root != null && doc != null) {
357            final Uri stateUri = RecentsProvider.buildState(
358                    root.authority, root.rootId, doc.documentId);
359            final ContentValues values = new ContentValues();
360            values.put(StateColumns.MODE, state.userMode);
361
362            new AsyncTask<Void, Void, Void>() {
363                @Override
364                protected Void doInBackground(Void... params) {
365                    resolver.insert(stateUri, values);
366                    return null;
367                }
368            }.execute();
369        }
370
371        // Mode change is just visual change; no need to kick loader, and
372        // deliver change event immediately.
373        state.derivedMode = state.userMode;
374        ((DocumentsActivity) getActivity()).onStateChanged();
375
376        updateDisplayState();
377    }
378
379    private void updateDisplayState() {
380        final State state = getDisplayState(this);
381
382        if (mLastMode == state.derivedMode && mLastShowSize == state.showSize) return;
383        mLastMode = state.derivedMode;
384        mLastShowSize = state.showSize;
385
386        mListView.setVisibility(state.derivedMode == MODE_LIST ? View.VISIBLE : View.GONE);
387        mGridView.setVisibility(state.derivedMode == MODE_GRID ? View.VISIBLE : View.GONE);
388
389        final int choiceMode;
390        if (state.allowMultiple) {
391            choiceMode = ListView.CHOICE_MODE_MULTIPLE_MODAL;
392        } else {
393            choiceMode = ListView.CHOICE_MODE_NONE;
394        }
395
396        final int thumbSize;
397        if (state.derivedMode == MODE_GRID) {
398            thumbSize = getResources().getDimensionPixelSize(R.dimen.grid_width);
399            mListView.setAdapter(null);
400            mListView.setChoiceMode(ListView.CHOICE_MODE_NONE);
401            mGridView.setAdapter(mAdapter);
402            mGridView.setColumnWidth(getResources().getDimensionPixelSize(R.dimen.grid_width));
403            mGridView.setNumColumns(GridView.AUTO_FIT);
404            mGridView.setChoiceMode(choiceMode);
405            mCurrentView = mGridView;
406        } else if (state.derivedMode == MODE_LIST) {
407            thumbSize = getResources().getDimensionPixelSize(R.dimen.icon_size);
408            mGridView.setAdapter(null);
409            mGridView.setChoiceMode(ListView.CHOICE_MODE_NONE);
410            mListView.setAdapter(mAdapter);
411            mListView.setChoiceMode(choiceMode);
412            mCurrentView = mListView;
413        } else {
414            throw new IllegalStateException("Unknown state " + state.derivedMode);
415        }
416
417        mThumbSize = new Point(thumbSize, thumbSize);
418    }
419
420    private OnItemClickListener mItemListener = new OnItemClickListener() {
421        @Override
422        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
423            final Cursor cursor = mAdapter.getItem(position);
424            if (cursor != null) {
425                final String docMimeType = getCursorString(cursor, Document.COLUMN_MIME_TYPE);
426                final int docFlags = getCursorInt(cursor, Document.COLUMN_FLAGS);
427                if (isDocumentEnabled(docMimeType, docFlags)) {
428                    final DocumentInfo doc = DocumentInfo.fromDirectoryCursor(cursor);
429                    ((DocumentsActivity) getActivity()).onDocumentPicked(doc);
430                }
431            }
432        }
433    };
434
435    private MultiChoiceModeListener mMultiListener = new MultiChoiceModeListener() {
436        @Override
437        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
438            mode.getMenuInflater().inflate(R.menu.mode_directory, menu);
439            return true;
440        }
441
442        @Override
443        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
444            final State state = getDisplayState(DirectoryFragment.this);
445
446            final MenuItem open = menu.findItem(R.id.menu_open);
447            final MenuItem share = menu.findItem(R.id.menu_share);
448            final MenuItem delete = menu.findItem(R.id.menu_delete);
449
450            final boolean manageMode = state.action == ACTION_MANAGE;
451            open.setVisible(!manageMode);
452            share.setVisible(manageMode);
453            delete.setVisible(manageMode);
454
455            return true;
456        }
457
458        @Override
459        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
460            final SparseBooleanArray checked = mCurrentView.getCheckedItemPositions();
461            final ArrayList<DocumentInfo> docs = Lists.newArrayList();
462            final int size = checked.size();
463            for (int i = 0; i < size; i++) {
464                if (checked.valueAt(i)) {
465                    final Cursor cursor = mAdapter.getItem(checked.keyAt(i));
466                    final DocumentInfo doc = DocumentInfo.fromDirectoryCursor(cursor);
467                    docs.add(doc);
468                }
469            }
470
471            final int id = item.getItemId();
472            if (id == R.id.menu_open) {
473                DocumentsActivity.get(DirectoryFragment.this).onDocumentsPicked(docs);
474                mode.finish();
475                return true;
476
477            } else if (id == R.id.menu_share) {
478                onShareDocuments(docs);
479                mode.finish();
480                return true;
481
482            } else if (id == R.id.menu_delete) {
483                onDeleteDocuments(docs);
484                mode.finish();
485                return true;
486
487            } else {
488                return false;
489            }
490        }
491
492        @Override
493        public void onDestroyActionMode(ActionMode mode) {
494            // ignored
495        }
496
497        @Override
498        public void onItemCheckedStateChanged(
499                ActionMode mode, int position, long id, boolean checked) {
500            if (checked) {
501                // Directories and footer items cannot be checked
502                boolean valid = false;
503
504                final Cursor cursor = mAdapter.getItem(position);
505                if (cursor != null) {
506                    final String docMimeType = getCursorString(cursor, Document.COLUMN_MIME_TYPE);
507                    final int docFlags = getCursorInt(cursor, Document.COLUMN_FLAGS);
508                    if (!Document.MIME_TYPE_DIR.equals(docMimeType)) {
509                        valid = isDocumentEnabled(docMimeType, docFlags);
510                    }
511                }
512
513                if (!valid) {
514                    mCurrentView.setItemChecked(position, false);
515                }
516            }
517
518            mode.setTitle(getResources()
519                    .getString(R.string.mode_selected_count, mCurrentView.getCheckedItemCount()));
520        }
521    };
522
523    private RecyclerListener mRecycleListener = new RecyclerListener() {
524        @Override
525        public void onMovedToScrapHeap(View view) {
526            final ImageView iconThumb = (ImageView) view.findViewById(R.id.icon_thumb);
527            if (iconThumb != null) {
528                final ThumbnailAsyncTask oldTask = (ThumbnailAsyncTask) iconThumb.getTag();
529                if (oldTask != null) {
530                    oldTask.preempt();
531                    iconThumb.setTag(null);
532                }
533            }
534        }
535    };
536
537    private void onShareDocuments(List<DocumentInfo> docs) {
538        Intent intent;
539        if (docs.size() == 1) {
540            final DocumentInfo doc = docs.get(0);
541
542            intent = new Intent(Intent.ACTION_SEND);
543            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
544            intent.addCategory(Intent.CATEGORY_DEFAULT);
545            intent.setType(doc.mimeType);
546            intent.putExtra(Intent.EXTRA_STREAM, doc.derivedUri);
547
548        } else if (docs.size() > 1) {
549            intent = new Intent(Intent.ACTION_SEND_MULTIPLE);
550            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
551            intent.addCategory(Intent.CATEGORY_DEFAULT);
552
553            final ArrayList<String> mimeTypes = Lists.newArrayList();
554            final ArrayList<Uri> uris = Lists.newArrayList();
555            for (DocumentInfo doc : docs) {
556                mimeTypes.add(doc.mimeType);
557                uris.add(doc.derivedUri);
558            }
559
560            intent.setType(findCommonMimeType(mimeTypes));
561            intent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, uris);
562
563        } else {
564            return;
565        }
566
567        intent = Intent.createChooser(intent, getActivity().getText(R.string.share_via));
568        startActivity(intent);
569    }
570
571    private void onDeleteDocuments(List<DocumentInfo> docs) {
572        final Context context = getActivity();
573        final ContentResolver resolver = context.getContentResolver();
574
575        boolean hadTrouble = false;
576        for (DocumentInfo doc : docs) {
577            if (!doc.isDeleteSupported()) {
578                Log.w(TAG, "Skipping " + doc);
579                hadTrouble = true;
580                continue;
581            }
582
583            ContentProviderClient client = null;
584            try {
585                client = DocumentsApplication.acquireUnstableProviderOrThrow(
586                        resolver, doc.derivedUri.getAuthority());
587                DocumentsContract.deleteDocument(client, doc.derivedUri);
588            } catch (Exception e) {
589                Log.w(TAG, "Failed to delete " + doc);
590                hadTrouble = true;
591            } finally {
592                ContentProviderClient.releaseQuietly(client);
593            }
594        }
595
596        if (hadTrouble) {
597            Toast.makeText(context, R.string.toast_failed_delete, Toast.LENGTH_SHORT).show();
598        }
599    }
600
601    private static State getDisplayState(Fragment fragment) {
602        return ((DocumentsActivity) fragment.getActivity()).getDisplayState();
603    }
604
605    private static abstract class Footer {
606        private final int mItemViewType;
607
608        public Footer(int itemViewType) {
609            mItemViewType = itemViewType;
610        }
611
612        public abstract View getView(View convertView, ViewGroup parent);
613
614        public int getItemViewType() {
615            return mItemViewType;
616        }
617    }
618
619    private class LoadingFooter extends Footer {
620        public LoadingFooter() {
621            super(1);
622        }
623
624        @Override
625        public View getView(View convertView, ViewGroup parent) {
626            final Context context = parent.getContext();
627            final State state = getDisplayState(DirectoryFragment.this);
628
629            if (convertView == null) {
630                final LayoutInflater inflater = LayoutInflater.from(context);
631                if (state.derivedMode == MODE_LIST) {
632                    convertView = inflater.inflate(R.layout.item_loading_list, parent, false);
633                } else if (state.derivedMode == MODE_GRID) {
634                    convertView = inflater.inflate(R.layout.item_loading_grid, parent, false);
635                } else {
636                    throw new IllegalStateException();
637                }
638            }
639
640            return convertView;
641        }
642    }
643
644    private class MessageFooter extends Footer {
645        private final int mIcon;
646        private final String mMessage;
647
648        public MessageFooter(int itemViewType, int icon, String message) {
649            super(itemViewType);
650            mIcon = icon;
651            mMessage = message;
652        }
653
654        @Override
655        public View getView(View convertView, ViewGroup parent) {
656            final Context context = parent.getContext();
657            final State state = getDisplayState(DirectoryFragment.this);
658
659            if (convertView == null) {
660                final LayoutInflater inflater = LayoutInflater.from(context);
661                if (state.derivedMode == MODE_LIST) {
662                    convertView = inflater.inflate(R.layout.item_message_list, parent, false);
663                } else if (state.derivedMode == MODE_GRID) {
664                    convertView = inflater.inflate(R.layout.item_message_grid, parent, false);
665                } else {
666                    throw new IllegalStateException();
667                }
668            }
669
670            final ImageView icon = (ImageView) convertView.findViewById(android.R.id.icon);
671            final TextView title = (TextView) convertView.findViewById(android.R.id.title);
672            icon.setImageResource(mIcon);
673            title.setText(mMessage);
674            return convertView;
675        }
676    }
677
678    private class DocumentsAdapter extends BaseAdapter {
679        private Cursor mCursor;
680        private int mCursorCount;
681
682        private List<Footer> mFooters = Lists.newArrayList();
683
684        public void swapResult(DirectoryResult result) {
685            mCursor = result != null ? result.cursor : null;
686            mCursorCount = mCursor != null ? mCursor.getCount() : 0;
687
688            mFooters.clear();
689
690            final Bundle extras = mCursor != null ? mCursor.getExtras() : null;
691            if (extras != null) {
692                final String info = extras.getString(DocumentsContract.EXTRA_INFO);
693                if (info != null) {
694                    mFooters.add(new MessageFooter(2, R.drawable.ic_dialog_info, info));
695                }
696                final String error = extras.getString(DocumentsContract.EXTRA_ERROR);
697                if (error != null) {
698                    mFooters.add(new MessageFooter(3, R.drawable.ic_dialog_alert, error));
699                }
700                if (extras.getBoolean(DocumentsContract.EXTRA_LOADING, false)) {
701                    mFooters.add(new LoadingFooter());
702                }
703            }
704
705            if (result != null && result.exception != null) {
706                mFooters.add(new MessageFooter(
707                        3, R.drawable.ic_dialog_alert, getString(R.string.query_error)));
708            }
709
710            if (isEmpty()) {
711                mEmptyView.setVisibility(View.VISIBLE);
712            } else {
713                mEmptyView.setVisibility(View.GONE);
714            }
715
716            notifyDataSetChanged();
717        }
718
719        @Override
720        public View getView(int position, View convertView, ViewGroup parent) {
721            if (position < mCursorCount) {
722                return getDocumentView(position, convertView, parent);
723            } else {
724                position -= mCursorCount;
725                convertView = mFooters.get(position).getView(convertView, parent);
726                // Only the view itself is disabled; contents inside shouldn't
727                // be dimmed.
728                convertView.setEnabled(false);
729                return convertView;
730            }
731        }
732
733        private View getDocumentView(int position, View convertView, ViewGroup parent) {
734            final Context context = parent.getContext();
735            final State state = getDisplayState(DirectoryFragment.this);
736
737            final DocumentInfo doc = getArguments().getParcelable(EXTRA_DOC);
738
739            final RootsCache roots = DocumentsApplication.getRootsCache(context);
740            final ThumbnailCache thumbs = DocumentsApplication.getThumbnailsCache(
741                    context, mThumbSize);
742
743            if (convertView == null) {
744                final LayoutInflater inflater = LayoutInflater.from(context);
745                if (state.derivedMode == MODE_LIST) {
746                    convertView = inflater.inflate(R.layout.item_doc_list, parent, false);
747                } else if (state.derivedMode == MODE_GRID) {
748                    convertView = inflater.inflate(R.layout.item_doc_grid, parent, false);
749
750                    // Apply padding to grid items
751                    final FrameLayout grid = (FrameLayout) convertView;
752                    final int gridPadding = getResources()
753                            .getDimensionPixelSize(R.dimen.grid_padding);
754
755                    // Tricksy hobbitses! We need to fully clear the drawable so
756                    // the view doesn't clobber the new InsetDrawable callback
757                    // when setting back later.
758                    final Drawable fg = grid.getForeground();
759                    final Drawable bg = grid.getBackground();
760                    grid.setForeground(null);
761                    grid.setBackground(null);
762                    grid.setForeground(new InsetDrawable(fg, gridPadding));
763                    grid.setBackground(new InsetDrawable(bg, gridPadding));
764                } else {
765                    throw new IllegalStateException();
766                }
767            }
768
769            final Cursor cursor = getItem(position);
770
771            final String docAuthority = getCursorString(cursor, RootCursorWrapper.COLUMN_AUTHORITY);
772            final String docRootId = getCursorString(cursor, RootCursorWrapper.COLUMN_ROOT_ID);
773            final String docId = getCursorString(cursor, Document.COLUMN_DOCUMENT_ID);
774            final String docMimeType = getCursorString(cursor, Document.COLUMN_MIME_TYPE);
775            final String docDisplayName = getCursorString(cursor, Document.COLUMN_DISPLAY_NAME);
776            final long docLastModified = getCursorLong(cursor, Document.COLUMN_LAST_MODIFIED);
777            final int docIcon = getCursorInt(cursor, Document.COLUMN_ICON);
778            final int docFlags = getCursorInt(cursor, Document.COLUMN_FLAGS);
779            final String docSummary = getCursorString(cursor, Document.COLUMN_SUMMARY);
780            final long docSize = getCursorLong(cursor, Document.COLUMN_SIZE);
781
782            final View line1 = convertView.findViewById(R.id.line1);
783            final View line2 = convertView.findViewById(R.id.line2);
784
785            final ImageView iconMime = (ImageView) convertView.findViewById(R.id.icon_mime);
786            final ImageView iconThumb = (ImageView) convertView.findViewById(R.id.icon_thumb);
787            final TextView title = (TextView) convertView.findViewById(android.R.id.title);
788            final ImageView icon1 = (ImageView) convertView.findViewById(android.R.id.icon1);
789            final ImageView icon2 = (ImageView) convertView.findViewById(android.R.id.icon2);
790            final TextView summary = (TextView) convertView.findViewById(android.R.id.summary);
791            final TextView date = (TextView) convertView.findViewById(R.id.date);
792            final TextView size = (TextView) convertView.findViewById(R.id.size);
793
794            final ThumbnailAsyncTask oldTask = (ThumbnailAsyncTask) iconThumb.getTag();
795            if (oldTask != null) {
796                oldTask.preempt();
797                iconThumb.setTag(null);
798            }
799
800            iconMime.animate().cancel();
801            iconThumb.animate().cancel();
802
803            final boolean supportsThumbnail = (docFlags & Document.FLAG_SUPPORTS_THUMBNAIL) != 0;
804            final boolean allowThumbnail = (state.derivedMode == MODE_GRID)
805                    || MimePredicate.mimeMatches(MimePredicate.VISUAL_MIMES, docMimeType);
806            final boolean showThumbnail = supportsThumbnail && allowThumbnail && !mSvelteRecents;
807
808            boolean cacheHit = false;
809            if (showThumbnail) {
810                final Uri uri = DocumentsContract.buildDocumentUri(docAuthority, docId);
811                final Bitmap cachedResult = thumbs.get(uri);
812                if (cachedResult != null) {
813                    iconThumb.setImageBitmap(cachedResult);
814                    cacheHit = true;
815                } else {
816                    iconThumb.setImageDrawable(null);
817                    final ThumbnailAsyncTask task = new ThumbnailAsyncTask(
818                            uri, iconMime, iconThumb, mThumbSize);
819                    iconThumb.setTag(task);
820                    ProviderExecutor.forAuthority(docAuthority).execute(task);
821                }
822            }
823
824            // Always throw MIME icon into place, even when a thumbnail is being
825            // loaded in background.
826            if (cacheHit) {
827                iconMime.setAlpha(0f);
828                iconMime.setImageDrawable(null);
829                iconThumb.setAlpha(1f);
830            } else {
831                iconMime.setAlpha(1f);
832                iconThumb.setAlpha(0f);
833                iconThumb.setImageDrawable(null);
834                if (docIcon != 0) {
835                    iconMime.setImageDrawable(
836                            IconUtils.loadPackageIcon(context, docAuthority, docIcon));
837                } else {
838                    iconMime.setImageDrawable(IconUtils.loadMimeIcon(
839                            context, docMimeType, docAuthority, docId, state.derivedMode));
840                }
841            }
842
843            boolean hasLine1 = false;
844            boolean hasLine2 = false;
845
846            final boolean hideTitle = (state.derivedMode == MODE_GRID) && mHideGridTitles;
847            if (!hideTitle) {
848                title.setText(docDisplayName);
849                hasLine1 = true;
850            }
851
852            Drawable iconDrawable = null;
853            if (mType == TYPE_RECENT_OPEN) {
854                // We've already had to enumerate roots before any results can
855                // be shown, so this will never block.
856                final RootInfo root = roots.getRootBlocking(docAuthority, docRootId);
857                iconDrawable = root.loadIcon(context);
858
859                if (summary != null) {
860                    final boolean alwaysShowSummary = getResources()
861                            .getBoolean(R.bool.always_show_summary);
862                    if (alwaysShowSummary) {
863                        summary.setText(root.getDirectoryString());
864                        summary.setVisibility(View.VISIBLE);
865                        hasLine2 = true;
866                    } else {
867                        if (iconDrawable != null && roots.isIconUniqueBlocking(root)) {
868                            // No summary needed if icon speaks for itself
869                            summary.setVisibility(View.INVISIBLE);
870                        } else {
871                            summary.setText(root.getDirectoryString());
872                            summary.setVisibility(View.VISIBLE);
873                            summary.setTextAlignment(TextView.TEXT_ALIGNMENT_TEXT_END);
874                            hasLine2 = true;
875                        }
876                    }
877                }
878            } else {
879                // Directories showing thumbnails in grid mode get a little icon
880                // hint to remind user they're a directory.
881                if (Document.MIME_TYPE_DIR.equals(docMimeType) && state.derivedMode == MODE_GRID
882                        && showThumbnail) {
883                    iconDrawable = context.getResources().getDrawable(R.drawable.ic_root_folder);
884                }
885
886                if (summary != null) {
887                    if (docSummary != null) {
888                        summary.setText(docSummary);
889                        summary.setVisibility(View.VISIBLE);
890                        hasLine2 = true;
891                    } else {
892                        summary.setVisibility(View.INVISIBLE);
893                    }
894                }
895            }
896
897            if (icon1 != null) icon1.setVisibility(View.GONE);
898            if (icon2 != null) icon2.setVisibility(View.GONE);
899
900            if (iconDrawable != null) {
901                if (hasLine1) {
902                    icon1.setVisibility(View.VISIBLE);
903                    icon1.setImageDrawable(iconDrawable);
904                } else {
905                    icon2.setVisibility(View.VISIBLE);
906                    icon2.setImageDrawable(iconDrawable);
907                }
908            }
909
910            if (docLastModified == -1) {
911                date.setText(null);
912            } else {
913                date.setText(formatTime(context, docLastModified));
914                hasLine2 = true;
915            }
916
917            if (state.showSize) {
918                size.setVisibility(View.VISIBLE);
919                if (Document.MIME_TYPE_DIR.equals(docMimeType) || docSize == -1) {
920                    size.setText(null);
921                } else {
922                    size.setText(Formatter.formatFileSize(context, docSize));
923                    hasLine2 = true;
924                }
925            } else {
926                size.setVisibility(View.GONE);
927            }
928
929            if (line1 != null) {
930                line1.setVisibility(hasLine1 ? View.VISIBLE : View.GONE);
931            }
932            if (line2 != null) {
933                line2.setVisibility(hasLine2 ? View.VISIBLE : View.GONE);
934            }
935
936            final boolean enabled = isDocumentEnabled(docMimeType, docFlags);
937            if (enabled) {
938                setEnabledRecursive(convertView, true);
939                iconMime.setAlpha(1f);
940                iconThumb.setAlpha(1f);
941                if (icon1 != null) icon1.setAlpha(1f);
942                if (icon2 != null) icon2.setAlpha(1f);
943            } else {
944                setEnabledRecursive(convertView, false);
945                iconMime.setAlpha(0.5f);
946                iconThumb.setAlpha(0.5f);
947                if (icon1 != null) icon1.setAlpha(0.5f);
948                if (icon2 != null) icon2.setAlpha(0.5f);
949            }
950
951            return convertView;
952        }
953
954        @Override
955        public int getCount() {
956            return mCursorCount + mFooters.size();
957        }
958
959        @Override
960        public Cursor getItem(int position) {
961            if (position < mCursorCount) {
962                mCursor.moveToPosition(position);
963                return mCursor;
964            } else {
965                return null;
966            }
967        }
968
969        @Override
970        public long getItemId(int position) {
971            return position;
972        }
973
974        @Override
975        public int getViewTypeCount() {
976            return 4;
977        }
978
979        @Override
980        public int getItemViewType(int position) {
981            if (position < mCursorCount) {
982                return 0;
983            } else {
984                position -= mCursorCount;
985                return mFooters.get(position).getItemViewType();
986            }
987        }
988    }
989
990    private static class ThumbnailAsyncTask extends AsyncTask<Uri, Void, Bitmap>
991            implements Preemptable {
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        @Override
1008        public void preempt() {
1009            cancel(false);
1010            mSignal.cancel();
1011        }
1012
1013        @Override
1014        protected Bitmap doInBackground(Uri... params) {
1015            if (isCancelled()) return null;
1016
1017            final Context context = mIconThumb.getContext();
1018            final ContentResolver resolver = context.getContentResolver();
1019
1020            ContentProviderClient client = null;
1021            Bitmap result = null;
1022            try {
1023                client = DocumentsApplication.acquireUnstableProviderOrThrow(
1024                        resolver, mUri.getAuthority());
1025                result = DocumentsContract.getDocumentThumbnail(client, mUri, mThumbSize, mSignal);
1026                if (result != null) {
1027                    final ThumbnailCache thumbs = DocumentsApplication.getThumbnailsCache(
1028                            context, mThumbSize);
1029                    thumbs.put(mUri, result);
1030                }
1031            } catch (Exception e) {
1032                if (!(e instanceof OperationCanceledException)) {
1033                    Log.w(TAG, "Failed to load thumbnail for " + mUri + ": " + e);
1034                }
1035            } finally {
1036                ContentProviderClient.releaseQuietly(client);
1037            }
1038            return result;
1039        }
1040
1041        @Override
1042        protected void onPostExecute(Bitmap result) {
1043            if (mIconThumb.getTag() == this && result != null) {
1044                mIconThumb.setTag(null);
1045                mIconThumb.setImageBitmap(result);
1046
1047                final float targetAlpha = mIconMime.isEnabled() ? 1f : 0.5f;
1048                mIconMime.setAlpha(targetAlpha);
1049                mIconMime.animate().alpha(0f).start();
1050                mIconThumb.setAlpha(0f);
1051                mIconThumb.animate().alpha(targetAlpha).start();
1052            }
1053        }
1054    }
1055
1056    private static String formatTime(Context context, long when) {
1057        // TODO: DateUtils should make this easier
1058        Time then = new Time();
1059        then.set(when);
1060        Time now = new Time();
1061        now.setToNow();
1062
1063        int flags = DateUtils.FORMAT_NO_NOON | DateUtils.FORMAT_NO_MIDNIGHT
1064                | DateUtils.FORMAT_ABBREV_ALL;
1065
1066        if (then.year != now.year) {
1067            flags |= DateUtils.FORMAT_SHOW_YEAR | DateUtils.FORMAT_SHOW_DATE;
1068        } else if (then.yearDay != now.yearDay) {
1069            flags |= DateUtils.FORMAT_SHOW_DATE;
1070        } else {
1071            flags |= DateUtils.FORMAT_SHOW_TIME;
1072        }
1073
1074        return DateUtils.formatDateTime(context, when, flags);
1075    }
1076
1077    private String findCommonMimeType(List<String> mimeTypes) {
1078        String[] commonType = mimeTypes.get(0).split("/");
1079        if (commonType.length != 2) {
1080            return "*/*";
1081        }
1082
1083        for (int i = 1; i < mimeTypes.size(); i++) {
1084            String[] type = mimeTypes.get(i).split("/");
1085            if (type.length != 2) continue;
1086
1087            if (!commonType[1].equals(type[1])) {
1088                commonType[1] = "*";
1089            }
1090
1091            if (!commonType[0].equals(type[0])) {
1092                commonType[0] = "*";
1093                commonType[1] = "*";
1094                break;
1095            }
1096        }
1097
1098        return commonType[0] + "/" + commonType[1];
1099    }
1100
1101    private void setEnabledRecursive(View v, boolean enabled) {
1102        if (v == null) return;
1103        if (v.isEnabled() == enabled) return;
1104        v.setEnabled(enabled);
1105
1106        if (v instanceof ViewGroup) {
1107            final ViewGroup vg = (ViewGroup) v;
1108            for (int i = vg.getChildCount() - 1; i >= 0; i--) {
1109                setEnabledRecursive(vg.getChildAt(i), enabled);
1110            }
1111        }
1112    }
1113
1114    private boolean isDocumentEnabled(String docMimeType, int docFlags) {
1115        final State state = getDisplayState(DirectoryFragment.this);
1116
1117        // Directories are always enabled
1118        if (Document.MIME_TYPE_DIR.equals(docMimeType)) {
1119            return true;
1120        }
1121
1122        // Read-only files are disabled when creating
1123        if (state.action == ACTION_CREATE && (docFlags & Document.FLAG_SUPPORTS_WRITE) == 0) {
1124            return false;
1125        }
1126
1127        return MimePredicate.mimeMatches(state.acceptMimes, docMimeType);
1128    }
1129}
1130