DirectoryFragment.java revision 59d577a518333f4b4514315b6d10e8dba160abcd 
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.BaseActivity.State.ACTION_BROWSE;
20import static com.android.documentsui.BaseActivity.State.ACTION_BROWSE_ALL;
21import static com.android.documentsui.BaseActivity.State.ACTION_CREATE;
22import static com.android.documentsui.BaseActivity.State.ACTION_MANAGE;
23import static com.android.documentsui.BaseActivity.State.MODE_GRID;
24import static com.android.documentsui.BaseActivity.State.MODE_LIST;
25import static com.android.documentsui.BaseActivity.State.MODE_UNKNOWN;
26import static com.android.documentsui.BaseActivity.State.SORT_ORDER_UNKNOWN;
27import static com.android.documentsui.DocumentsActivity.TAG;
28import static com.android.documentsui.model.DocumentInfo.getCursorInt;
29import static com.android.documentsui.model.DocumentInfo.getCursorLong;
30import static com.android.documentsui.model.DocumentInfo.getCursorString;
31
32import android.app.Activity;
33import android.app.ActivityManager;
34import android.app.Fragment;
35import android.app.FragmentManager;
36import android.app.FragmentTransaction;
37import android.app.LoaderManager.LoaderCallbacks;
38import android.content.ContentProviderClient;
39import android.content.ContentResolver;
40import android.content.ContentValues;
41import android.content.Context;
42import android.content.Intent;
43import android.content.Loader;
44import android.content.res.Resources;
45import android.database.Cursor;
46import android.graphics.Bitmap;
47import android.graphics.Point;
48import android.graphics.drawable.Drawable;
49import android.graphics.drawable.InsetDrawable;
50import android.net.Uri;
51import android.os.AsyncTask;
52import android.os.Bundle;
53import android.os.CancellationSignal;
54import android.os.OperationCanceledException;
55import android.os.Parcelable;
56import android.os.SystemProperties;
57import android.provider.DocumentsContract;
58import android.provider.DocumentsContract.Document;
59import android.text.format.DateUtils;
60import android.text.format.Formatter;
61import android.text.format.Time;
62import android.util.Log;
63import android.util.SparseArray;
64import android.util.SparseBooleanArray;
65import android.view.ActionMode;
66import android.view.LayoutInflater;
67import android.view.Menu;
68import android.view.MenuItem;
69import android.view.View;
70import android.view.ViewGroup;
71import android.widget.AbsListView;
72import android.widget.AbsListView.MultiChoiceModeListener;
73import android.widget.AbsListView.RecyclerListener;
74import android.widget.AdapterView;
75import android.widget.AdapterView.OnItemClickListener;
76import android.widget.BaseAdapter;
77import android.widget.GridView;
78import android.widget.ImageView;
79import android.widget.ListView;
80import android.widget.TextView;
81import android.widget.Toast;
82
83import com.android.documentsui.BaseActivity.State;
84import com.android.documentsui.ProviderExecutor.Preemptable;
85import com.android.documentsui.RecentsProvider.StateColumns;
86import com.android.documentsui.model.DocumentInfo;
87import com.android.documentsui.model.RootInfo;
88import com.google.android.collect.Lists;
89
90import java.util.ArrayList;
91import java.util.List;
92
93/**
94 * Display the documents inside a single directory.
95 */
96public class DirectoryFragment extends Fragment {
97
98    private View mEmptyView;
99    private ListView mListView;
100    private GridView mGridView;
101
102    private AbsListView mCurrentView;
103
104    private List<DocumentInfo> mSelectedDocumentsForCopy;
105
106    public static final int TYPE_NORMAL = 1;
107    public static final int TYPE_SEARCH = 2;
108    public static final int TYPE_RECENT_OPEN = 3;
109
110    public static final int ANIM_NONE = 1;
111    public static final int ANIM_SIDE = 2;
112    public static final int ANIM_DOWN = 3;
113    public static final int ANIM_UP = 4;
114
115    public static final int REQUEST_COPY_DESTINATION = 1;
116
117    private int mType = TYPE_NORMAL;
118    private String mStateKey;
119
120    private int mLastMode = MODE_UNKNOWN;
121    private int mLastSortOrder = SORT_ORDER_UNKNOWN;
122    private boolean mLastShowSize = false;
123
124    private boolean mHideGridTitles = false;
125
126    private boolean mSvelteRecents;
127    private Point mThumbSize;
128
129    private DocumentsAdapter mAdapter;
130    private LoaderCallbacks<DirectoryResult> mCallbacks;
131
132    private static final String EXTRA_TYPE = "type";
133    private static final String EXTRA_ROOT = "root";
134    private static final String EXTRA_DOC = "doc";
135    private static final String EXTRA_QUERY = "query";
136    private static final String EXTRA_IGNORE_STATE = "ignoreState";
137
138    private final int mLoaderId = 42;
139
140    public static void showNormal(FragmentManager fm, RootInfo root, DocumentInfo doc, int anim) {
141        show(fm, TYPE_NORMAL, root, doc, null, anim);
142    }
143
144    public static void showSearch(FragmentManager fm, RootInfo root, String query, int anim) {
145        show(fm, TYPE_SEARCH, root, null, query, anim);
146    }
147
148    public static void showRecentsOpen(FragmentManager fm, int anim) {
149        show(fm, TYPE_RECENT_OPEN, null, null, null, anim);
150    }
151
152    private static void show(FragmentManager fm, int type, RootInfo root, DocumentInfo doc,
153            String query, int anim) {
154        final Bundle args = new Bundle();
155        args.putInt(EXTRA_TYPE, type);
156        args.putParcelable(EXTRA_ROOT, root);
157        args.putParcelable(EXTRA_DOC, doc);
158        args.putString(EXTRA_QUERY, query);
159
160        final FragmentTransaction ft = fm.beginTransaction();
161        switch (anim) {
162            case ANIM_SIDE:
163                args.putBoolean(EXTRA_IGNORE_STATE, true);
164                break;
165            case ANIM_DOWN:
166                args.putBoolean(EXTRA_IGNORE_STATE, true);
167                ft.setCustomAnimations(R.animator.dir_down, R.animator.dir_frozen);
168                break;
169            case ANIM_UP:
170                ft.setCustomAnimations(R.animator.dir_frozen, R.animator.dir_up);
171                break;
172        }
173
174        final DirectoryFragment fragment = new DirectoryFragment();
175        fragment.setArguments(args);
176
177        ft.replace(R.id.container_directory, fragment);
178        ft.commitAllowingStateLoss();
179    }
180
181    private static String buildStateKey(RootInfo root, DocumentInfo doc) {
182        final StringBuilder builder = new StringBuilder();
183        builder.append(root != null ? root.authority : "null").append(';');
184        builder.append(root != null ? root.rootId : "null").append(';');
185        builder.append(doc != null ? doc.documentId : "null");
186        return builder.toString();
187    }
188
189    public static DirectoryFragment get(FragmentManager fm) {
190        // TODO: deal with multiple directories shown at once
191        return (DirectoryFragment) fm.findFragmentById(R.id.container_directory);
192    }
193
194    @Override
195    public View onCreateView(
196            LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
197        final Context context = inflater.getContext();
198        final Resources res = context.getResources();
199        final View view = inflater.inflate(R.layout.fragment_directory, container, false);
200
201        mEmptyView = view.findViewById(android.R.id.empty);
202
203        mListView = (ListView) view.findViewById(R.id.list);
204        mListView.setOnItemClickListener(mItemListener);
205        mListView.setMultiChoiceModeListener(mMultiListener);
206        mListView.setRecyclerListener(mRecycleListener);
207
208        // Indent our list divider to align with text
209        final Drawable divider = mListView.getDivider();
210        final boolean insetLeft = res.getBoolean(R.bool.list_divider_inset_left);
211        final int insetSize = res.getDimensionPixelSize(R.dimen.list_divider_inset);
212        if (insetLeft) {
213            mListView.setDivider(new InsetDrawable(divider, insetSize, 0, 0, 0));
214        } else {
215            mListView.setDivider(new InsetDrawable(divider, 0, 0, insetSize, 0));
216        }
217
218        mGridView = (GridView) view.findViewById(R.id.grid);
219        mGridView.setOnItemClickListener(mItemListener);
220        mGridView.setMultiChoiceModeListener(mMultiListener);
221        mGridView.setRecyclerListener(mRecycleListener);
222
223        return view;
224    }
225
226    @Override
227    public void onDestroyView() {
228        super.onDestroyView();
229
230        // Cancel any outstanding thumbnail requests
231        final ViewGroup target = (mListView.getAdapter() != null) ? mListView : mGridView;
232        final int count = target.getChildCount();
233        for (int i = 0; i < count; i++) {
234            final View view = target.getChildAt(i);
235            mRecycleListener.onMovedToScrapHeap(view);
236        }
237
238        // Tear down any selection in progress
239        mListView.setChoiceMode(AbsListView.CHOICE_MODE_NONE);
240        mGridView.setChoiceMode(AbsListView.CHOICE_MODE_NONE);
241    }
242
243    @Override
244    public void onActivityCreated(Bundle savedInstanceState) {
245        super.onActivityCreated(savedInstanceState);
246
247        final Context context = getActivity();
248        final State state = getDisplayState(DirectoryFragment.this);
249
250        final RootInfo root = getArguments().getParcelable(EXTRA_ROOT);
251        final DocumentInfo doc = getArguments().getParcelable(EXTRA_DOC);
252
253        mAdapter = new DocumentsAdapter();
254        mType = getArguments().getInt(EXTRA_TYPE);
255        mStateKey = buildStateKey(root, doc);
256
257        if (mType == TYPE_RECENT_OPEN) {
258            // Hide titles when showing recents for picking images/videos
259            mHideGridTitles = MimePredicate.mimeMatches(
260                    MimePredicate.VISUAL_MIMES, state.acceptMimes);
261        } else {
262            mHideGridTitles = (doc != null) && doc.isGridTitlesHidden();
263        }
264
265        final ActivityManager am = (ActivityManager) context.getSystemService(
266                Context.ACTIVITY_SERVICE);
267        mSvelteRecents = am.isLowRamDevice() && (mType == TYPE_RECENT_OPEN);
268
269        mCallbacks = new LoaderCallbacks<DirectoryResult>() {
270            @Override
271            public Loader<DirectoryResult> onCreateLoader(int id, Bundle args) {
272                final String query = getArguments().getString(EXTRA_QUERY);
273
274                Uri contentsUri;
275                switch (mType) {
276                    case TYPE_NORMAL:
277                        contentsUri = DocumentsContract.buildChildDocumentsUri(
278                                doc.authority, doc.documentId);
279                        if (state.action == ACTION_MANAGE) {
280                            contentsUri = DocumentsContract.setManageMode(contentsUri);
281                        }
282                        return new DirectoryLoader(
283                                context, mType, root, doc, contentsUri, state.userSortOrder);
284                    case TYPE_SEARCH:
285                        contentsUri = DocumentsContract.buildSearchDocumentsUri(
286                                root.authority, root.rootId, query);
287                        if (state.action == ACTION_MANAGE) {
288                            contentsUri = DocumentsContract.setManageMode(contentsUri);
289                        }
290                        return new DirectoryLoader(
291                                context, mType, root, doc, contentsUri, state.userSortOrder);
292                    case TYPE_RECENT_OPEN:
293                        final RootsCache roots = DocumentsApplication.getRootsCache(context);
294                        return new RecentLoader(context, roots, state);
295                    default:
296                        throw new IllegalStateException("Unknown type " + mType);
297                }
298            }
299
300            @Override
301            public void onLoadFinished(Loader<DirectoryResult> loader, DirectoryResult result) {
302                if (!isAdded()) return;
303
304                mAdapter.swapResult(result);
305
306                // Push latest state up to UI
307                // TODO: if mode change was racing with us, don't overwrite it
308                if (result.mode != MODE_UNKNOWN) {
309                    state.derivedMode = result.mode;
310                }
311                state.derivedSortOrder = result.sortOrder;
312                ((BaseActivity) context).onStateChanged();
313
314                updateDisplayState();
315
316                // When launched into empty recents, show drawer
317                if (mType == TYPE_RECENT_OPEN && mAdapter.isEmpty() && !state.stackTouched) {
318                    ((BaseActivity) context).setRootsDrawerOpen(true);
319                }
320
321                // Restore any previous instance state
322                final SparseArray<Parcelable> container = state.dirState.remove(mStateKey);
323                if (container != null && !getArguments().getBoolean(EXTRA_IGNORE_STATE, false)) {
324                    getView().restoreHierarchyState(container);
325                } else if (mLastSortOrder != state.derivedSortOrder) {
326                    mListView.smoothScrollToPosition(0);
327                    mGridView.smoothScrollToPosition(0);
328                }
329
330                mLastSortOrder = state.derivedSortOrder;
331            }
332
333            @Override
334            public void onLoaderReset(Loader<DirectoryResult> loader) {
335                mAdapter.swapResult(null);
336            }
337        };
338
339        // Kick off loader at least once
340        getLoaderManager().restartLoader(mLoaderId, null, mCallbacks);
341
342        updateDisplayState();
343    }
344
345    @Override
346    public void onActivityResult(int requestCode, int resultCode, Intent data) {
347        final Context context = getActivity();
348        final Resources res = context.getResources();
349
350        // There's only one request code right now. Replace this with a switch statement or
351        // something more scalable when more codes are added.
352        if (requestCode != REQUEST_COPY_DESTINATION) {
353            return;
354        }
355        if (resultCode == Activity.RESULT_CANCELED || data == null) {
356            // User pressed the back button or otherwise cancelled the destination pick. Don't
357            // proceed with the copy.
358            return;
359        }
360
361        // Because the destination picker is launched using an open tree intent, the URI returned is
362        // a tree URI. Convert it to a document URI.
363        // TODO: Remove this step when the destination picker returns a document URI.
364        final Uri destinationTree = data.getData();
365        final Uri destination = DocumentsContract.buildDocumentUriUsingTree(destinationTree,
366                DocumentsContract.getTreeDocumentId(destinationTree));
367
368        List<DocumentInfo> docs = mSelectedDocumentsForCopy;
369        Intent copyIntent = new Intent(context, CopyService.class);
370        copyIntent.putParcelableArrayListExtra(CopyService.EXTRA_SRC_LIST,
371                new ArrayList<DocumentInfo>(docs));
372        copyIntent.setData(destination);
373
374        Toast.makeText(context,
375                res.getQuantityString(R.plurals.copy_begin, docs.size(), docs.size()),
376                Toast.LENGTH_SHORT).show();
377        context.startService(copyIntent);
378    }
379
380    @Override
381    public void onStop() {
382        super.onStop();
383
384        // Remember last scroll location
385        final SparseArray<Parcelable> container = new SparseArray<Parcelable>();
386        getView().saveHierarchyState(container);
387        final State state = getDisplayState(this);
388        state.dirState.put(mStateKey, container);
389    }
390
391    @Override
392    public void onResume() {
393        super.onResume();
394        updateDisplayState();
395    }
396
397    public void onDisplayStateChanged() {
398        updateDisplayState();
399    }
400
401    public void onUserSortOrderChanged() {
402        // Sort order change always triggers reload; we'll trigger state change
403        // on the flip side.
404        getLoaderManager().restartLoader(mLoaderId, null, mCallbacks);
405    }
406
407    public void onUserModeChanged() {
408        final ContentResolver resolver = getActivity().getContentResolver();
409        final State state = getDisplayState(this);
410
411        final RootInfo root = getArguments().getParcelable(EXTRA_ROOT);
412        final DocumentInfo doc = getArguments().getParcelable(EXTRA_DOC);
413
414        if (root != null && doc != null) {
415            final Uri stateUri = RecentsProvider.buildState(
416                    root.authority, root.rootId, doc.documentId);
417            final ContentValues values = new ContentValues();
418            values.put(StateColumns.MODE, state.userMode);
419
420            new AsyncTask<Void, Void, Void>() {
421                @Override
422                protected Void doInBackground(Void... params) {
423                    resolver.insert(stateUri, values);
424                    return null;
425                }
426            }.execute();
427        }
428
429        // Mode change is just visual change; no need to kick loader, and
430        // deliver change event immediately.
431        state.derivedMode = state.userMode;
432        ((BaseActivity) getActivity()).onStateChanged();
433
434        updateDisplayState();
435    }
436
437    private void updateDisplayState() {
438        final State state = getDisplayState(this);
439
440        if (mLastMode == state.derivedMode && mLastShowSize == state.showSize) return;
441        mLastMode = state.derivedMode;
442        mLastShowSize = state.showSize;
443
444        mListView.setVisibility(state.derivedMode == MODE_LIST ? View.VISIBLE : View.GONE);
445        mGridView.setVisibility(state.derivedMode == MODE_GRID ? View.VISIBLE : View.GONE);
446
447        final int choiceMode;
448        if (state.allowMultiple) {
449            choiceMode = ListView.CHOICE_MODE_MULTIPLE_MODAL;
450        } else {
451            choiceMode = ListView.CHOICE_MODE_NONE;
452        }
453
454        final int thumbSize;
455        if (state.derivedMode == MODE_GRID) {
456            thumbSize = getResources().getDimensionPixelSize(R.dimen.grid_width);
457            mListView.setAdapter(null);
458            mListView.setChoiceMode(ListView.CHOICE_MODE_NONE);
459            mGridView.setAdapter(mAdapter);
460            mGridView.setColumnWidth(getResources().getDimensionPixelSize(R.dimen.grid_width));
461            mGridView.setNumColumns(GridView.AUTO_FIT);
462            mGridView.setChoiceMode(choiceMode);
463            mCurrentView = mGridView;
464        } else if (state.derivedMode == MODE_LIST) {
465            thumbSize = getResources().getDimensionPixelSize(R.dimen.icon_size);
466            mGridView.setAdapter(null);
467            mGridView.setChoiceMode(ListView.CHOICE_MODE_NONE);
468            mListView.setAdapter(mAdapter);
469            mListView.setChoiceMode(choiceMode);
470            mCurrentView = mListView;
471        } else {
472            throw new IllegalStateException("Unknown state " + state.derivedMode);
473        }
474
475        mThumbSize = new Point(thumbSize, thumbSize);
476    }
477
478    private OnItemClickListener mItemListener = new OnItemClickListener() {
479        @Override
480        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
481            final Cursor cursor = mAdapter.getItem(position);
482            if (cursor != null) {
483                final String docMimeType = getCursorString(cursor, Document.COLUMN_MIME_TYPE);
484                final int docFlags = getCursorInt(cursor, Document.COLUMN_FLAGS);
485                if (isDocumentEnabled(docMimeType, docFlags)) {
486                    final DocumentInfo doc = DocumentInfo.fromDirectoryCursor(cursor);
487                    ((BaseActivity) getActivity()).onDocumentPicked(doc);
488                }
489            }
490        }
491    };
492
493    private MultiChoiceModeListener mMultiListener = new MultiChoiceModeListener() {
494        @Override
495        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
496            mode.getMenuInflater().inflate(R.menu.mode_directory, menu);
497            mode.setTitle(getResources()
498                    .getString(R.string.mode_selected_count, mCurrentView.getCheckedItemCount()));
499            return true;
500        }
501
502        @Override
503        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
504            final State state = getDisplayState(DirectoryFragment.this);
505
506            final MenuItem open = menu.findItem(R.id.menu_open);
507            final MenuItem share = menu.findItem(R.id.menu_share);
508            final MenuItem delete = menu.findItem(R.id.menu_delete);
509            final MenuItem copy = menu.findItem(R.id.menu_copy);
510
511            final boolean manageOrBrowse = (state.action == ACTION_MANAGE
512                    || state.action == ACTION_BROWSE || state.action == ACTION_BROWSE_ALL);
513
514            open.setVisible(!manageOrBrowse);
515            share.setVisible(manageOrBrowse);
516            delete.setVisible(manageOrBrowse);
517
518            // TODO: unhide copying when ready
519            copy.setVisible(manageOrBrowse &&
520                    SystemProperties.getBoolean("debug.documentsui.enable_copy", false));
521
522            return true;
523        }
524
525        @Override
526        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
527            final SparseBooleanArray checked = mCurrentView.getCheckedItemPositions();
528            final ArrayList<DocumentInfo> docs = Lists.newArrayList();
529            final int size = checked.size();
530            for (int i = 0; i < size; i++) {
531                if (checked.valueAt(i)) {
532                    final Cursor cursor = mAdapter.getItem(checked.keyAt(i));
533                    final DocumentInfo doc = DocumentInfo.fromDirectoryCursor(cursor);
534                    docs.add(doc);
535                }
536            }
537
538            final int id = item.getItemId();
539            if (id == R.id.menu_open) {
540                BaseActivity.get(DirectoryFragment.this).onDocumentsPicked(docs);
541                mode.finish();
542                return true;
543
544            } else if (id == R.id.menu_share) {
545                onShareDocuments(docs);
546                mode.finish();
547                return true;
548
549            } else if (id == R.id.menu_delete) {
550                onDeleteDocuments(docs);
551                mode.finish();
552                return true;
553
554            } else if (id == R.id.menu_copy) {
555                onCopyDocuments(docs);
556                mode.finish();
557                return true;
558
559            } else if (id == R.id.menu_select_all) {
560                int count = mCurrentView.getCount();
561                for (int i = 0; i < count; i++) {
562                    mCurrentView.setItemChecked(i, true);
563                }
564                updateDisplayState();
565                return true;
566
567            } else {
568                return false;
569            }
570        }
571
572        @Override
573        public void onDestroyActionMode(ActionMode mode) {
574            // ignored
575        }
576
577        @Override
578        public void onItemCheckedStateChanged(
579                ActionMode mode, int position, long id, boolean checked) {
580            if (checked) {
581                // Directories and footer items cannot be checked
582                boolean valid = false;
583
584                final Cursor cursor = mAdapter.getItem(position);
585                if (cursor != null) {
586                    final String docMimeType = getCursorString(cursor, Document.COLUMN_MIME_TYPE);
587                    final int docFlags = getCursorInt(cursor, Document.COLUMN_FLAGS);
588                    valid = isDocumentEnabled(docMimeType, docFlags);
589                }
590
591                if (!valid) {
592                    mCurrentView.setItemChecked(position, false);
593                }
594            }
595
596            mode.setTitle(getResources()
597                    .getString(R.string.mode_selected_count, mCurrentView.getCheckedItemCount()));
598        }
599    };
600
601    private RecyclerListener mRecycleListener = new RecyclerListener() {
602        @Override
603        public void onMovedToScrapHeap(View view) {
604            final ImageView iconThumb = (ImageView) view.findViewById(R.id.icon_thumb);
605            if (iconThumb != null) {
606                final ThumbnailAsyncTask oldTask = (ThumbnailAsyncTask) iconThumb.getTag();
607                if (oldTask != null) {
608                    oldTask.preempt();
609                    iconThumb.setTag(null);
610                }
611            }
612        }
613    };
614
615    private void onShareDocuments(List<DocumentInfo> docs) {
616        Intent intent;
617
618        // Filter out directories - those can't be shared.
619        List<DocumentInfo> docsForSend = Lists.newArrayList();
620        for (DocumentInfo doc: docs) {
621            if (!Document.MIME_TYPE_DIR.equals(doc.mimeType)) {
622                docsForSend.add(doc);
623            }
624        }
625
626        if (docsForSend.size() == 1) {
627            final DocumentInfo doc = docsForSend.get(0);
628
629            intent = new Intent(Intent.ACTION_SEND);
630            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
631            intent.addCategory(Intent.CATEGORY_DEFAULT);
632            intent.setType(doc.mimeType);
633            intent.putExtra(Intent.EXTRA_STREAM, doc.derivedUri);
634
635        } else if (docsForSend.size() > 1) {
636            intent = new Intent(Intent.ACTION_SEND_MULTIPLE);
637            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
638            intent.addCategory(Intent.CATEGORY_DEFAULT);
639
640            final ArrayList<String> mimeTypes = Lists.newArrayList();
641            final ArrayList<Uri> uris = Lists.newArrayList();
642            for (DocumentInfo doc : docsForSend) {
643                mimeTypes.add(doc.mimeType);
644                uris.add(doc.derivedUri);
645            }
646
647            intent.setType(findCommonMimeType(mimeTypes));
648            intent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, uris);
649
650        } else {
651            return;
652        }
653
654        intent = Intent.createChooser(intent, getActivity().getText(R.string.share_via));
655        startActivity(intent);
656    }
657
658    private void onDeleteDocuments(List<DocumentInfo> docs) {
659        final Context context = getActivity();
660        final ContentResolver resolver = context.getContentResolver();
661
662        boolean hadTrouble = false;
663        for (DocumentInfo doc : docs) {
664            if (!doc.isDeleteSupported()) {
665                Log.w(TAG, "Skipping " + doc);
666                hadTrouble = true;
667                continue;
668            }
669
670            ContentProviderClient client = null;
671            try {
672                client = DocumentsApplication.acquireUnstableProviderOrThrow(
673                        resolver, doc.derivedUri.getAuthority());
674                DocumentsContract.deleteDocument(client, doc.derivedUri);
675            } catch (Exception e) {
676                Log.w(TAG, "Failed to delete " + doc);
677                hadTrouble = true;
678            } finally {
679                ContentProviderClient.releaseQuietly(client);
680            }
681        }
682
683        if (hadTrouble) {
684            Toast.makeText(context, R.string.toast_failed_delete, Toast.LENGTH_SHORT).show();
685        }
686    }
687
688    private void onCopyDocuments(List<DocumentInfo> docs) {
689        mSelectedDocumentsForCopy = docs;
690
691        // Pop up a dialog to pick a destination.  This is inadequate but works for now.
692        // TODO: Implement a picker that is to spec.
693        Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT_TREE);
694        startActivityForResult(intent, REQUEST_COPY_DESTINATION);
695    }
696
697    private static State getDisplayState(Fragment fragment) {
698        return ((BaseActivity) fragment.getActivity()).getDisplayState();
699    }
700
701    private static abstract class Footer {
702        private final int mItemViewType;
703
704        public Footer(int itemViewType) {
705            mItemViewType = itemViewType;
706        }
707
708        public abstract View getView(View convertView, ViewGroup parent);
709
710        public int getItemViewType() {
711            return mItemViewType;
712        }
713    }
714
715    private class LoadingFooter extends Footer {
716        public LoadingFooter() {
717            super(1);
718        }
719
720        @Override
721        public View getView(View convertView, ViewGroup parent) {
722            final Context context = parent.getContext();
723            final State state = getDisplayState(DirectoryFragment.this);
724
725            if (convertView == null) {
726                final LayoutInflater inflater = LayoutInflater.from(context);
727                if (state.derivedMode == MODE_LIST) {
728                    convertView = inflater.inflate(R.layout.item_loading_list, parent, false);
729                } else if (state.derivedMode == MODE_GRID) {
730                    convertView = inflater.inflate(R.layout.item_loading_grid, parent, false);
731                } else {
732                    throw new IllegalStateException();
733                }
734            }
735
736            return convertView;
737        }
738    }
739
740    private class MessageFooter extends Footer {
741        private final int mIcon;
742        private final String mMessage;
743
744        public MessageFooter(int itemViewType, int icon, String message) {
745            super(itemViewType);
746            mIcon = icon;
747            mMessage = message;
748        }
749
750        @Override
751        public View getView(View convertView, ViewGroup parent) {
752            final Context context = parent.getContext();
753            final State state = getDisplayState(DirectoryFragment.this);
754
755            if (convertView == null) {
756                final LayoutInflater inflater = LayoutInflater.from(context);
757                if (state.derivedMode == MODE_LIST) {
758                    convertView = inflater.inflate(R.layout.item_message_list, parent, false);
759                } else if (state.derivedMode == MODE_GRID) {
760                    convertView = inflater.inflate(R.layout.item_message_grid, parent, false);
761                } else {
762                    throw new IllegalStateException();
763                }
764            }
765
766            final ImageView icon = (ImageView) convertView.findViewById(android.R.id.icon);
767            final TextView title = (TextView) convertView.findViewById(android.R.id.title);
768            icon.setImageResource(mIcon);
769            title.setText(mMessage);
770            return convertView;
771        }
772    }
773
774    private class DocumentsAdapter extends BaseAdapter {
775        private Cursor mCursor;
776        private int mCursorCount;
777
778        private List<Footer> mFooters = Lists.newArrayList();
779
780        public void swapResult(DirectoryResult result) {
781            mCursor = result != null ? result.cursor : null;
782            mCursorCount = mCursor != null ? mCursor.getCount() : 0;
783
784            mFooters.clear();
785
786            final Bundle extras = mCursor != null ? mCursor.getExtras() : null;
787            if (extras != null) {
788                final String info = extras.getString(DocumentsContract.EXTRA_INFO);
789                if (info != null) {
790                    mFooters.add(new MessageFooter(2, R.drawable.ic_dialog_info, info));
791                }
792                final String error = extras.getString(DocumentsContract.EXTRA_ERROR);
793                if (error != null) {
794                    mFooters.add(new MessageFooter(3, R.drawable.ic_dialog_alert, error));
795                }
796                if (extras.getBoolean(DocumentsContract.EXTRA_LOADING, false)) {
797                    mFooters.add(new LoadingFooter());
798                }
799            }
800
801            if (result != null && result.exception != null) {
802                mFooters.add(new MessageFooter(
803                        3, R.drawable.ic_dialog_alert, getString(R.string.query_error)));
804            }
805
806            if (isEmpty()) {
807                mEmptyView.setVisibility(View.VISIBLE);
808            } else {
809                mEmptyView.setVisibility(View.GONE);
810            }
811
812            notifyDataSetChanged();
813        }
814
815        @Override
816        public View getView(int position, View convertView, ViewGroup parent) {
817            if (position < mCursorCount) {
818                return getDocumentView(position, convertView, parent);
819            } else {
820                position -= mCursorCount;
821                convertView = mFooters.get(position).getView(convertView, parent);
822                // Only the view itself is disabled; contents inside shouldn't
823                // be dimmed.
824                convertView.setEnabled(false);
825                return convertView;
826            }
827        }
828
829        private View getDocumentView(int position, View convertView, ViewGroup parent) {
830            final Context context = parent.getContext();
831            final State state = getDisplayState(DirectoryFragment.this);
832
833            final DocumentInfo doc = getArguments().getParcelable(EXTRA_DOC);
834
835            final RootsCache roots = DocumentsApplication.getRootsCache(context);
836            final ThumbnailCache thumbs = DocumentsApplication.getThumbnailsCache(
837                    context, mThumbSize);
838
839            if (convertView == null) {
840                final LayoutInflater inflater = LayoutInflater.from(context);
841                if (state.derivedMode == MODE_LIST) {
842                    convertView = inflater.inflate(R.layout.item_doc_list, parent, false);
843                } else if (state.derivedMode == MODE_GRID) {
844                    convertView = inflater.inflate(R.layout.item_doc_grid, parent, false);
845                } else {
846                    throw new IllegalStateException();
847                }
848            }
849
850            final Cursor cursor = getItem(position);
851
852            final String docAuthority = getCursorString(cursor, RootCursorWrapper.COLUMN_AUTHORITY);
853            final String docRootId = getCursorString(cursor, RootCursorWrapper.COLUMN_ROOT_ID);
854            final String docId = getCursorString(cursor, Document.COLUMN_DOCUMENT_ID);
855            final String docMimeType = getCursorString(cursor, Document.COLUMN_MIME_TYPE);
856            final String docDisplayName = getCursorString(cursor, Document.COLUMN_DISPLAY_NAME);
857            final long docLastModified = getCursorLong(cursor, Document.COLUMN_LAST_MODIFIED);
858            final int docIcon = getCursorInt(cursor, Document.COLUMN_ICON);
859            final int docFlags = getCursorInt(cursor, Document.COLUMN_FLAGS);
860            final String docSummary = getCursorString(cursor, Document.COLUMN_SUMMARY);
861            final long docSize = getCursorLong(cursor, Document.COLUMN_SIZE);
862
863            final View line1 = convertView.findViewById(R.id.line1);
864            final View line2 = convertView.findViewById(R.id.line2);
865
866            final ImageView iconMime = (ImageView) convertView.findViewById(R.id.icon_mime);
867            final ImageView iconThumb = (ImageView) convertView.findViewById(R.id.icon_thumb);
868            final TextView title = (TextView) convertView.findViewById(android.R.id.title);
869            final ImageView icon1 = (ImageView) convertView.findViewById(android.R.id.icon1);
870            final ImageView icon2 = (ImageView) convertView.findViewById(android.R.id.icon2);
871            final TextView summary = (TextView) convertView.findViewById(android.R.id.summary);
872            final TextView date = (TextView) convertView.findViewById(R.id.date);
873            final TextView size = (TextView) convertView.findViewById(R.id.size);
874
875            final ThumbnailAsyncTask oldTask = (ThumbnailAsyncTask) iconThumb.getTag();
876            if (oldTask != null) {
877                oldTask.preempt();
878                iconThumb.setTag(null);
879            }
880
881            iconMime.animate().cancel();
882            iconThumb.animate().cancel();
883
884            final boolean supportsThumbnail = (docFlags & Document.FLAG_SUPPORTS_THUMBNAIL) != 0;
885            final boolean allowThumbnail = (state.derivedMode == MODE_GRID)
886                    || MimePredicate.mimeMatches(MimePredicate.VISUAL_MIMES, docMimeType);
887            final boolean showThumbnail = supportsThumbnail && allowThumbnail && !mSvelteRecents;
888
889            final boolean enabled = isDocumentEnabled(docMimeType, docFlags);
890            final float iconAlpha = (state.derivedMode == MODE_LIST && !enabled) ? 0.5f : 1f;
891
892            boolean cacheHit = false;
893            if (showThumbnail) {
894                final Uri uri = DocumentsContract.buildDocumentUri(docAuthority, docId);
895                final Bitmap cachedResult = thumbs.get(uri);
896                if (cachedResult != null) {
897                    iconThumb.setImageBitmap(cachedResult);
898                    cacheHit = true;
899                } else {
900                    iconThumb.setImageDrawable(null);
901                    final ThumbnailAsyncTask task = new ThumbnailAsyncTask(
902                            uri, iconMime, iconThumb, mThumbSize, iconAlpha);
903                    iconThumb.setTag(task);
904                    ProviderExecutor.forAuthority(docAuthority).execute(task);
905                }
906            }
907
908            // Always throw MIME icon into place, even when a thumbnail is being
909            // loaded in background.
910            if (cacheHit) {
911                iconMime.setAlpha(0f);
912                iconMime.setImageDrawable(null);
913                iconThumb.setAlpha(1f);
914            } else {
915                iconMime.setAlpha(1f);
916                iconThumb.setAlpha(0f);
917                iconThumb.setImageDrawable(null);
918                if (docIcon != 0) {
919                    iconMime.setImageDrawable(
920                            IconUtils.loadPackageIcon(context, docAuthority, docIcon));
921                } else {
922                    iconMime.setImageDrawable(IconUtils.loadMimeIcon(
923                            context, docMimeType, docAuthority, docId, state.derivedMode));
924                }
925            }
926
927            boolean hasLine1 = false;
928            boolean hasLine2 = false;
929
930            final boolean hideTitle = (state.derivedMode == MODE_GRID) && mHideGridTitles;
931            if (!hideTitle) {
932                title.setText(docDisplayName);
933                hasLine1 = true;
934            }
935
936            Drawable iconDrawable = null;
937            if (mType == TYPE_RECENT_OPEN) {
938                // We've already had to enumerate roots before any results can
939                // be shown, so this will never block.
940                final RootInfo root = roots.getRootBlocking(docAuthority, docRootId);
941                if (state.derivedMode == MODE_GRID) {
942                    iconDrawable = root.loadGridIcon(context);
943                } else {
944                    iconDrawable = root.loadIcon(context);
945                }
946
947                if (summary != null) {
948                    final boolean alwaysShowSummary = getResources()
949                            .getBoolean(R.bool.always_show_summary);
950                    if (alwaysShowSummary) {
951                        summary.setText(root.getDirectoryString());
952                        summary.setVisibility(View.VISIBLE);
953                        hasLine2 = true;
954                    } else {
955                        if (iconDrawable != null && roots.isIconUniqueBlocking(root)) {
956                            // No summary needed if icon speaks for itself
957                            summary.setVisibility(View.INVISIBLE);
958                        } else {
959                            summary.setText(root.getDirectoryString());
960                            summary.setVisibility(View.VISIBLE);
961                            summary.setTextAlignment(TextView.TEXT_ALIGNMENT_TEXT_END);
962                            hasLine2 = true;
963                        }
964                    }
965                }
966            } else {
967                // Directories showing thumbnails in grid mode get a little icon
968                // hint to remind user they're a directory.
969                if (Document.MIME_TYPE_DIR.equals(docMimeType) && state.derivedMode == MODE_GRID
970                        && showThumbnail) {
971                    iconDrawable = IconUtils.applyTintAttr(context, R.drawable.ic_doc_folder,
972                            android.R.attr.textColorPrimaryInverse);
973                }
974
975                if (summary != null) {
976                    if (docSummary != null) {
977                        summary.setText(docSummary);
978                        summary.setVisibility(View.VISIBLE);
979                        hasLine2 = true;
980                    } else {
981                        summary.setVisibility(View.INVISIBLE);
982                    }
983                }
984            }
985
986            if (icon1 != null) icon1.setVisibility(View.GONE);
987            if (icon2 != null) icon2.setVisibility(View.GONE);
988
989            if (iconDrawable != null) {
990                if (hasLine1) {
991                    icon1.setVisibility(View.VISIBLE);
992                    icon1.setImageDrawable(iconDrawable);
993                } else {
994                    icon2.setVisibility(View.VISIBLE);
995                    icon2.setImageDrawable(iconDrawable);
996                }
997            }
998
999            if (docLastModified == -1) {
1000                date.setText(null);
1001            } else {
1002                date.setText(formatTime(context, docLastModified));
1003                hasLine2 = true;
1004            }
1005
1006            if (state.showSize) {
1007                size.setVisibility(View.VISIBLE);
1008                if (Document.MIME_TYPE_DIR.equals(docMimeType) || docSize == -1) {
1009                    size.setText(null);
1010                } else {
1011                    size.setText(Formatter.formatFileSize(context, docSize));
1012                    hasLine2 = true;
1013                }
1014            } else {
1015                size.setVisibility(View.GONE);
1016            }
1017
1018            if (line1 != null) {
1019                line1.setVisibility(hasLine1 ? View.VISIBLE : View.GONE);
1020            }
1021            if (line2 != null) {
1022                line2.setVisibility(hasLine2 ? View.VISIBLE : View.GONE);
1023            }
1024
1025            setEnabledRecursive(convertView, enabled);
1026
1027            iconMime.setAlpha(iconAlpha);
1028            iconThumb.setAlpha(iconAlpha);
1029            if (icon1 != null) icon1.setAlpha(iconAlpha);
1030            if (icon2 != null) icon2.setAlpha(iconAlpha);
1031
1032            return convertView;
1033        }
1034
1035        @Override
1036        public int getCount() {
1037            return mCursorCount + mFooters.size();
1038        }
1039
1040        @Override
1041        public Cursor getItem(int position) {
1042            if (position < mCursorCount) {
1043                mCursor.moveToPosition(position);
1044                return mCursor;
1045            } else {
1046                return null;
1047            }
1048        }
1049
1050        @Override
1051        public long getItemId(int position) {
1052            return position;
1053        }
1054
1055        @Override
1056        public int getViewTypeCount() {
1057            return 4;
1058        }
1059
1060        @Override
1061        public int getItemViewType(int position) {
1062            if (position < mCursorCount) {
1063                return 0;
1064            } else {
1065                position -= mCursorCount;
1066                return mFooters.get(position).getItemViewType();
1067            }
1068        }
1069    }
1070
1071    private static class ThumbnailAsyncTask extends AsyncTask<Uri, Void, Bitmap>
1072            implements Preemptable {
1073        private final Uri mUri;
1074        private final ImageView mIconMime;
1075        private final ImageView mIconThumb;
1076        private final Point mThumbSize;
1077        private final float mTargetAlpha;
1078        private final CancellationSignal mSignal;
1079
1080        public ThumbnailAsyncTask(Uri uri, ImageView iconMime, ImageView iconThumb, Point thumbSize,
1081                float targetAlpha) {
1082            mUri = uri;
1083            mIconMime = iconMime;
1084            mIconThumb = iconThumb;
1085            mThumbSize = thumbSize;
1086            mTargetAlpha = targetAlpha;
1087            mSignal = new CancellationSignal();
1088        }
1089
1090        @Override
1091        public void preempt() {
1092            cancel(false);
1093            mSignal.cancel();
1094        }
1095
1096        @Override
1097        protected Bitmap doInBackground(Uri... params) {
1098            if (isCancelled()) return null;
1099
1100            final Context context = mIconThumb.getContext();
1101            final ContentResolver resolver = context.getContentResolver();
1102
1103            ContentProviderClient client = null;
1104            Bitmap result = null;
1105            try {
1106                client = DocumentsApplication.acquireUnstableProviderOrThrow(
1107                        resolver, mUri.getAuthority());
1108                result = DocumentsContract.getDocumentThumbnail(client, mUri, mThumbSize, mSignal);
1109                if (result != null) {
1110                    final ThumbnailCache thumbs = DocumentsApplication.getThumbnailsCache(
1111                            context, mThumbSize);
1112                    thumbs.put(mUri, result);
1113                }
1114            } catch (Exception e) {
1115                if (!(e instanceof OperationCanceledException)) {
1116                    Log.w(TAG, "Failed to load thumbnail for " + mUri + ": " + e);
1117                }
1118            } finally {
1119                ContentProviderClient.releaseQuietly(client);
1120            }
1121            return result;
1122        }
1123
1124        @Override
1125        protected void onPostExecute(Bitmap result) {
1126            if (mIconThumb.getTag() == this && result != null) {
1127                mIconThumb.setTag(null);
1128                mIconThumb.setImageBitmap(result);
1129
1130                mIconMime.setAlpha(mTargetAlpha);
1131                mIconMime.animate().alpha(0f).start();
1132                mIconThumb.setAlpha(0f);
1133                mIconThumb.animate().alpha(mTargetAlpha).start();
1134            }
1135        }
1136    }
1137
1138    private static String formatTime(Context context, long when) {
1139        // TODO: DateUtils should make this easier
1140        Time then = new Time();
1141        then.set(when);
1142        Time now = new Time();
1143        now.setToNow();
1144
1145        int flags = DateUtils.FORMAT_NO_NOON | DateUtils.FORMAT_NO_MIDNIGHT
1146                | DateUtils.FORMAT_ABBREV_ALL;
1147
1148        if (then.year != now.year) {
1149            flags |= DateUtils.FORMAT_SHOW_YEAR | DateUtils.FORMAT_SHOW_DATE;
1150        } else if (then.yearDay != now.yearDay) {
1151            flags |= DateUtils.FORMAT_SHOW_DATE;
1152        } else {
1153            flags |= DateUtils.FORMAT_SHOW_TIME;
1154        }
1155
1156        return DateUtils.formatDateTime(context, when, flags);
1157    }
1158
1159    private String findCommonMimeType(List<String> mimeTypes) {
1160        String[] commonType = mimeTypes.get(0).split("/");
1161        if (commonType.length != 2) {
1162            return "*/*";
1163        }
1164
1165        for (int i = 1; i < mimeTypes.size(); i++) {
1166            String[] type = mimeTypes.get(i).split("/");
1167            if (type.length != 2) continue;
1168
1169            if (!commonType[1].equals(type[1])) {
1170                commonType[1] = "*";
1171            }
1172
1173            if (!commonType[0].equals(type[0])) {
1174                commonType[0] = "*";
1175                commonType[1] = "*";
1176                break;
1177            }
1178        }
1179
1180        return commonType[0] + "/" + commonType[1];
1181    }
1182
1183    private void setEnabledRecursive(View v, boolean enabled) {
1184        if (v == null) return;
1185        if (v.isEnabled() == enabled) return;
1186        v.setEnabled(enabled);
1187
1188        if (v instanceof ViewGroup) {
1189            final ViewGroup vg = (ViewGroup) v;
1190            for (int i = vg.getChildCount() - 1; i >= 0; i--) {
1191                setEnabledRecursive(vg.getChildAt(i), enabled);
1192            }
1193        }
1194    }
1195
1196    private boolean isDocumentEnabled(String docMimeType, int docFlags) {
1197        final State state = getDisplayState(DirectoryFragment.this);
1198
1199        // Directories are always enabled
1200        if (Document.MIME_TYPE_DIR.equals(docMimeType)) {
1201            return true;
1202        }
1203
1204        // Read-only files are disabled when creating
1205        if (state.action == ACTION_CREATE && (docFlags & Document.FLAG_SUPPORTS_WRITE) == 0) {
1206            return false;
1207        }
1208
1209        return MimePredicate.mimeMatches(state.acceptMimes, docMimeType);
1210    }
1211}
1212