DirectoryFragment.java revision c5979d98cff02117ef1272b1d97982bf5232ef01 
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.provider.DocumentsContract;
57import android.provider.DocumentsContract.Document;
58import android.text.format.DateUtils;
59import android.text.format.Formatter;
60import android.text.format.Time;
61import android.util.Log;
62import android.util.SparseArray;
63import android.util.SparseBooleanArray;
64import android.view.ActionMode;
65import android.view.LayoutInflater;
66import android.view.Menu;
67import android.view.MenuItem;
68import android.view.View;
69import android.view.ViewGroup;
70import android.widget.AbsListView;
71import android.widget.AbsListView.MultiChoiceModeListener;
72import android.widget.AbsListView.RecyclerListener;
73import android.widget.AdapterView;
74import android.widget.AdapterView.OnItemClickListener;
75import android.widget.BaseAdapter;
76import android.widget.GridView;
77import android.widget.ImageView;
78import android.widget.ListView;
79import android.widget.TextView;
80import android.widget.Toast;
81
82import com.android.documentsui.BaseActivity.State;
83import com.android.documentsui.ProviderExecutor.Preemptable;
84import com.android.documentsui.RecentsProvider.StateColumns;
85import com.android.documentsui.model.DocumentInfo;
86import com.android.documentsui.model.RootInfo;
87import com.google.android.collect.Lists;
88
89import java.util.ArrayList;
90import java.util.List;
91
92/**
93 * Display the documents inside a single directory.
94 */
95public class DirectoryFragment extends Fragment {
96
97    private View mEmptyView;
98    private ListView mListView;
99    private GridView mGridView;
100
101    private AbsListView mCurrentView;
102
103    public static final int TYPE_NORMAL = 1;
104    public static final int TYPE_SEARCH = 2;
105    public static final int TYPE_RECENT_OPEN = 3;
106
107    public static final int ANIM_NONE = 1;
108    public static final int ANIM_SIDE = 2;
109    public static final int ANIM_DOWN = 3;
110    public static final int ANIM_UP = 4;
111
112    public static final int REQUEST_COPY_DESTINATION = 1;
113
114    private int mType = TYPE_NORMAL;
115    private String mStateKey;
116
117    private int mLastMode = MODE_UNKNOWN;
118    private int mLastSortOrder = SORT_ORDER_UNKNOWN;
119    private boolean mLastShowSize = false;
120
121    private boolean mHideGridTitles = false;
122
123    private boolean mSvelteRecents;
124    private Point mThumbSize;
125
126    private DocumentsAdapter mAdapter;
127    private LoaderCallbacks<DirectoryResult> mCallbacks;
128
129    private static final String EXTRA_TYPE = "type";
130    private static final String EXTRA_ROOT = "root";
131    private static final String EXTRA_DOC = "doc";
132    private static final String EXTRA_QUERY = "query";
133    private static final String EXTRA_IGNORE_STATE = "ignoreState";
134
135    private final int mLoaderId = 42;
136
137    public static void showNormal(FragmentManager fm, RootInfo root, DocumentInfo doc, int anim) {
138        show(fm, TYPE_NORMAL, root, doc, null, anim);
139    }
140
141    public static void showSearch(FragmentManager fm, RootInfo root, String query, int anim) {
142        show(fm, TYPE_SEARCH, root, null, query, anim);
143    }
144
145    public static void showRecentsOpen(FragmentManager fm, int anim) {
146        show(fm, TYPE_RECENT_OPEN, null, null, null, anim);
147    }
148
149    private static void show(FragmentManager fm, int type, RootInfo root, DocumentInfo doc,
150            String query, int anim) {
151        final Bundle args = new Bundle();
152        args.putInt(EXTRA_TYPE, type);
153        args.putParcelable(EXTRA_ROOT, root);
154        args.putParcelable(EXTRA_DOC, doc);
155        args.putString(EXTRA_QUERY, query);
156
157        final FragmentTransaction ft = fm.beginTransaction();
158        switch (anim) {
159            case ANIM_SIDE:
160                args.putBoolean(EXTRA_IGNORE_STATE, true);
161                break;
162            case ANIM_DOWN:
163                args.putBoolean(EXTRA_IGNORE_STATE, true);
164                ft.setCustomAnimations(R.animator.dir_down, R.animator.dir_frozen);
165                break;
166            case ANIM_UP:
167                ft.setCustomAnimations(R.animator.dir_frozen, R.animator.dir_up);
168                break;
169        }
170
171        final DirectoryFragment fragment = new DirectoryFragment();
172        fragment.setArguments(args);
173
174        ft.replace(R.id.container_directory, fragment);
175        ft.commitAllowingStateLoss();
176    }
177
178    private static String buildStateKey(RootInfo root, DocumentInfo doc) {
179        final StringBuilder builder = new StringBuilder();
180        builder.append(root != null ? root.authority : "null").append(';');
181        builder.append(root != null ? root.rootId : "null").append(';');
182        builder.append(doc != null ? doc.documentId : "null");
183        return builder.toString();
184    }
185
186    public static DirectoryFragment get(FragmentManager fm) {
187        // TODO: deal with multiple directories shown at once
188        return (DirectoryFragment) fm.findFragmentById(R.id.container_directory);
189    }
190
191    @Override
192    public View onCreateView(
193            LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
194        final Context context = inflater.getContext();
195        final Resources res = context.getResources();
196        final View view = inflater.inflate(R.layout.fragment_directory, container, false);
197
198        mEmptyView = view.findViewById(android.R.id.empty);
199
200        mListView = (ListView) view.findViewById(R.id.list);
201        mListView.setOnItemClickListener(mItemListener);
202        mListView.setMultiChoiceModeListener(mMultiListener);
203        mListView.setRecyclerListener(mRecycleListener);
204
205        // Indent our list divider to align with text
206        final Drawable divider = mListView.getDivider();
207        final boolean insetLeft = res.getBoolean(R.bool.list_divider_inset_left);
208        final int insetSize = res.getDimensionPixelSize(R.dimen.list_divider_inset);
209        if (insetLeft) {
210            mListView.setDivider(new InsetDrawable(divider, insetSize, 0, 0, 0));
211        } else {
212            mListView.setDivider(new InsetDrawable(divider, 0, 0, insetSize, 0));
213        }
214
215        mGridView = (GridView) view.findViewById(R.id.grid);
216        mGridView.setOnItemClickListener(mItemListener);
217        mGridView.setMultiChoiceModeListener(mMultiListener);
218        mGridView.setRecyclerListener(mRecycleListener);
219
220        return view;
221    }
222
223    @Override
224    public void onDestroyView() {
225        super.onDestroyView();
226
227        // Cancel any outstanding thumbnail requests
228        final ViewGroup target = (mListView.getAdapter() != null) ? mListView : mGridView;
229        final int count = target.getChildCount();
230        for (int i = 0; i < count; i++) {
231            final View view = target.getChildAt(i);
232            mRecycleListener.onMovedToScrapHeap(view);
233        }
234
235        // Tear down any selection in progress
236        mListView.setChoiceMode(AbsListView.CHOICE_MODE_NONE);
237        mGridView.setChoiceMode(AbsListView.CHOICE_MODE_NONE);
238    }
239
240    @Override
241    public void onActivityCreated(Bundle savedInstanceState) {
242        super.onActivityCreated(savedInstanceState);
243
244        final Context context = getActivity();
245        final State state = getDisplayState(DirectoryFragment.this);
246
247        final RootInfo root = getArguments().getParcelable(EXTRA_ROOT);
248        final DocumentInfo doc = getArguments().getParcelable(EXTRA_DOC);
249
250        mAdapter = new DocumentsAdapter();
251        mType = getArguments().getInt(EXTRA_TYPE);
252        mStateKey = buildStateKey(root, doc);
253
254        if (mType == TYPE_RECENT_OPEN) {
255            // Hide titles when showing recents for picking images/videos
256            mHideGridTitles = MimePredicate.mimeMatches(
257                    MimePredicate.VISUAL_MIMES, state.acceptMimes);
258        } else {
259            mHideGridTitles = (doc != null) && doc.isGridTitlesHidden();
260        }
261
262        final ActivityManager am = (ActivityManager) context.getSystemService(
263                Context.ACTIVITY_SERVICE);
264        mSvelteRecents = am.isLowRamDevice() && (mType == TYPE_RECENT_OPEN);
265
266        mCallbacks = new LoaderCallbacks<DirectoryResult>() {
267            @Override
268            public Loader<DirectoryResult> onCreateLoader(int id, Bundle args) {
269                final String query = getArguments().getString(EXTRA_QUERY);
270
271                Uri contentsUri;
272                switch (mType) {
273                    case TYPE_NORMAL:
274                        contentsUri = DocumentsContract.buildChildDocumentsUri(
275                                doc.authority, doc.documentId);
276                        if (state.action == ACTION_MANAGE) {
277                            contentsUri = DocumentsContract.setManageMode(contentsUri);
278                        }
279                        return new DirectoryLoader(
280                                context, mType, root, doc, contentsUri, state.userSortOrder);
281                    case TYPE_SEARCH:
282                        contentsUri = DocumentsContract.buildSearchDocumentsUri(
283                                root.authority, root.rootId, query);
284                        if (state.action == ACTION_MANAGE) {
285                            contentsUri = DocumentsContract.setManageMode(contentsUri);
286                        }
287                        return new DirectoryLoader(
288                                context, mType, root, doc, contentsUri, state.userSortOrder);
289                    case TYPE_RECENT_OPEN:
290                        final RootsCache roots = DocumentsApplication.getRootsCache(context);
291                        return new RecentLoader(context, roots, state);
292                    default:
293                        throw new IllegalStateException("Unknown type " + mType);
294                }
295            }
296
297            @Override
298            public void onLoadFinished(Loader<DirectoryResult> loader, DirectoryResult result) {
299                if (!isAdded()) return;
300
301                mAdapter.swapResult(result);
302
303                // Push latest state up to UI
304                // TODO: if mode change was racing with us, don't overwrite it
305                if (result.mode != MODE_UNKNOWN) {
306                    state.derivedMode = result.mode;
307                }
308                state.derivedSortOrder = result.sortOrder;
309                ((BaseActivity) context).onStateChanged();
310
311                updateDisplayState();
312
313                // When launched into empty recents, show drawer
314                if (mType == TYPE_RECENT_OPEN && mAdapter.isEmpty() && !state.stackTouched) {
315                    ((BaseActivity) context).setRootsDrawerOpen(true);
316                }
317
318                // Restore any previous instance state
319                final SparseArray<Parcelable> container = state.dirState.remove(mStateKey);
320                if (container != null && !getArguments().getBoolean(EXTRA_IGNORE_STATE, false)) {
321                    getView().restoreHierarchyState(container);
322                } else if (mLastSortOrder != state.derivedSortOrder) {
323                    mListView.smoothScrollToPosition(0);
324                    mGridView.smoothScrollToPosition(0);
325                }
326
327                mLastSortOrder = state.derivedSortOrder;
328            }
329
330            @Override
331            public void onLoaderReset(Loader<DirectoryResult> loader) {
332                mAdapter.swapResult(null);
333            }
334        };
335
336        // Kick off loader at least once
337        getLoaderManager().restartLoader(mLoaderId, null, mCallbacks);
338
339        updateDisplayState();
340    }
341
342    @Override
343    public void onActivityResult(int requestCode, int resultCode, Intent data) {
344        final Context context = getActivity();
345        final Resources res = context.getResources();
346
347        // There's only one request code right now. Replace this with a switch statement or
348        // something more scalable when more codes are added.
349        if (requestCode != REQUEST_COPY_DESTINATION) {
350            return;
351        }
352        if (resultCode == Activity.RESULT_CANCELED || data == null) {
353            // User pressed the back button or otherwise cancelled the destination pick. Don't
354            // proceed with the copy.
355            return;
356        }
357
358        final List<DocumentInfo> docs = getDisplayState(this).selectedDocumentsForCopy;
359        final Intent copyIntent = new Intent(context, CopyService.class);
360        copyIntent.putParcelableArrayListExtra(CopyService.EXTRA_SRC_LIST, new ArrayList<DocumentInfo>(docs));
361        copyIntent.putExtra(CopyService.EXTRA_STACK, data.getParcelableExtra(CopyService.EXTRA_STACK));
362
363        Toast.makeText(context,
364                res.getQuantityString(R.plurals.copy_begin, docs.size(), docs.size()),
365                Toast.LENGTH_SHORT).show();
366        context.startService(copyIntent);
367    }
368
369    @Override
370    public void onStop() {
371        super.onStop();
372
373        // Remember last scroll location
374        final SparseArray<Parcelable> container = new SparseArray<Parcelable>();
375        getView().saveHierarchyState(container);
376        final State state = getDisplayState(this);
377        state.dirState.put(mStateKey, container);
378    }
379
380    @Override
381    public void onResume() {
382        super.onResume();
383        updateDisplayState();
384    }
385
386    public void onDisplayStateChanged() {
387        updateDisplayState();
388    }
389
390    public void onUserSortOrderChanged() {
391        // Sort order change always triggers reload; we'll trigger state change
392        // on the flip side.
393        getLoaderManager().restartLoader(mLoaderId, null, mCallbacks);
394    }
395
396    public void onUserModeChanged() {
397        final ContentResolver resolver = getActivity().getContentResolver();
398        final State state = getDisplayState(this);
399
400        final RootInfo root = getArguments().getParcelable(EXTRA_ROOT);
401        final DocumentInfo doc = getArguments().getParcelable(EXTRA_DOC);
402
403        if (root != null && doc != null) {
404            final Uri stateUri = RecentsProvider.buildState(
405                    root.authority, root.rootId, doc.documentId);
406            final ContentValues values = new ContentValues();
407            values.put(StateColumns.MODE, state.userMode);
408
409            new AsyncTask<Void, Void, Void>() {
410                @Override
411                protected Void doInBackground(Void... params) {
412                    resolver.insert(stateUri, values);
413                    return null;
414                }
415            }.execute();
416        }
417
418        // Mode change is just visual change; no need to kick loader, and
419        // deliver change event immediately.
420        state.derivedMode = state.userMode;
421        ((BaseActivity) getActivity()).onStateChanged();
422
423        updateDisplayState();
424    }
425
426    private void updateDisplayState() {
427        final State state = getDisplayState(this);
428
429        if (mLastMode == state.derivedMode && mLastShowSize == state.showSize) return;
430        mLastMode = state.derivedMode;
431        mLastShowSize = state.showSize;
432
433        mListView.setVisibility(state.derivedMode == MODE_LIST ? View.VISIBLE : View.GONE);
434        mGridView.setVisibility(state.derivedMode == MODE_GRID ? View.VISIBLE : View.GONE);
435
436        final int choiceMode;
437        if (state.allowMultiple) {
438            choiceMode = ListView.CHOICE_MODE_MULTIPLE_MODAL;
439        } else {
440            choiceMode = ListView.CHOICE_MODE_NONE;
441        }
442
443        final int thumbSize;
444        if (state.derivedMode == MODE_GRID) {
445            thumbSize = getResources().getDimensionPixelSize(R.dimen.grid_width);
446            mListView.setAdapter(null);
447            mListView.setChoiceMode(ListView.CHOICE_MODE_NONE);
448            mGridView.setAdapter(mAdapter);
449            mGridView.setColumnWidth(getResources().getDimensionPixelSize(R.dimen.grid_width));
450            mGridView.setNumColumns(GridView.AUTO_FIT);
451            mGridView.setChoiceMode(choiceMode);
452            mCurrentView = mGridView;
453        } else if (state.derivedMode == MODE_LIST) {
454            thumbSize = getResources().getDimensionPixelSize(R.dimen.icon_size);
455            mGridView.setAdapter(null);
456            mGridView.setChoiceMode(ListView.CHOICE_MODE_NONE);
457            mListView.setAdapter(mAdapter);
458            mListView.setChoiceMode(choiceMode);
459            mCurrentView = mListView;
460        } else {
461            throw new IllegalStateException("Unknown state " + state.derivedMode);
462        }
463
464        mThumbSize = new Point(thumbSize, thumbSize);
465    }
466
467    private OnItemClickListener mItemListener = new OnItemClickListener() {
468        @Override
469        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
470            final Cursor cursor = mAdapter.getItem(position);
471            if (cursor != null) {
472                final String docMimeType = getCursorString(cursor, Document.COLUMN_MIME_TYPE);
473                final int docFlags = getCursorInt(cursor, Document.COLUMN_FLAGS);
474                if (isDocumentEnabled(docMimeType, docFlags)) {
475                    final DocumentInfo doc = DocumentInfo.fromDirectoryCursor(cursor);
476                    ((BaseActivity) getActivity()).onDocumentPicked(doc);
477                }
478            }
479        }
480    };
481
482    private MultiChoiceModeListener mMultiListener = new MultiChoiceModeListener() {
483        @Override
484        public boolean onCreateActionMode(ActionMode mode, Menu menu) {
485            mode.getMenuInflater().inflate(R.menu.mode_directory, menu);
486            mode.setTitle(getResources()
487                    .getString(R.string.mode_selected_count, mCurrentView.getCheckedItemCount()));
488            return true;
489        }
490
491        @Override
492        public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
493            final State state = getDisplayState(DirectoryFragment.this);
494
495            final MenuItem open = menu.findItem(R.id.menu_open);
496            final MenuItem share = menu.findItem(R.id.menu_share);
497            final MenuItem delete = menu.findItem(R.id.menu_delete);
498            final MenuItem copy = menu.findItem(R.id.menu_copy);
499
500            final boolean manageOrBrowse = (state.action == ACTION_MANAGE
501                    || state.action == ACTION_BROWSE || state.action == ACTION_BROWSE_ALL);
502
503            open.setVisible(!manageOrBrowse);
504            share.setVisible(manageOrBrowse);
505            delete.setVisible(manageOrBrowse);
506            // Disable copying from the Recents view.
507            copy.setVisible(manageOrBrowse && mType != TYPE_RECENT_OPEN);
508
509            return true;
510        }
511
512        @Override
513        public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
514            final SparseBooleanArray checked = mCurrentView.getCheckedItemPositions();
515            final ArrayList<DocumentInfo> docs = Lists.newArrayList();
516            final int size = checked.size();
517            for (int i = 0; i < size; i++) {
518                if (checked.valueAt(i)) {
519                    final Cursor cursor = mAdapter.getItem(checked.keyAt(i));
520                    final DocumentInfo doc = DocumentInfo.fromDirectoryCursor(cursor);
521                    docs.add(doc);
522                }
523            }
524
525            final int id = item.getItemId();
526            if (id == R.id.menu_open) {
527                BaseActivity.get(DirectoryFragment.this).onDocumentsPicked(docs);
528                mode.finish();
529                return true;
530
531            } else if (id == R.id.menu_share) {
532                onShareDocuments(docs);
533                mode.finish();
534                return true;
535
536            } else if (id == R.id.menu_delete) {
537                onDeleteDocuments(docs);
538                mode.finish();
539                return true;
540
541            } else if (id == R.id.menu_copy) {
542                onCopyDocuments(docs);
543                mode.finish();
544                return true;
545
546            } else if (id == R.id.menu_select_all) {
547                int count = mCurrentView.getCount();
548                for (int i = 0; i < count; i++) {
549                    mCurrentView.setItemChecked(i, true);
550                }
551                updateDisplayState();
552                return true;
553
554            } else {
555                return false;
556            }
557        }
558
559        @Override
560        public void onDestroyActionMode(ActionMode mode) {
561            // ignored
562        }
563
564        @Override
565        public void onItemCheckedStateChanged(
566                ActionMode mode, int position, long id, boolean checked) {
567            if (checked) {
568                // Directories and footer items cannot be checked
569                boolean valid = false;
570
571                final Cursor cursor = mAdapter.getItem(position);
572                if (cursor != null) {
573                    final String docMimeType = getCursorString(cursor, Document.COLUMN_MIME_TYPE);
574                    final int docFlags = getCursorInt(cursor, Document.COLUMN_FLAGS);
575                    valid = isDocumentEnabled(docMimeType, docFlags);
576                }
577
578                if (!valid) {
579                    mCurrentView.setItemChecked(position, false);
580                }
581            }
582
583            mode.setTitle(getResources()
584                    .getString(R.string.mode_selected_count, mCurrentView.getCheckedItemCount()));
585        }
586    };
587
588    private RecyclerListener mRecycleListener = new RecyclerListener() {
589        @Override
590        public void onMovedToScrapHeap(View view) {
591            final ImageView iconThumb = (ImageView) view.findViewById(R.id.icon_thumb);
592            if (iconThumb != null) {
593                final ThumbnailAsyncTask oldTask = (ThumbnailAsyncTask) iconThumb.getTag();
594                if (oldTask != null) {
595                    oldTask.preempt();
596                    iconThumb.setTag(null);
597                }
598            }
599        }
600    };
601
602    private void onShareDocuments(List<DocumentInfo> docs) {
603        Intent intent;
604
605        // Filter out directories - those can't be shared.
606        List<DocumentInfo> docsForSend = Lists.newArrayList();
607        for (DocumentInfo doc: docs) {
608            if (!Document.MIME_TYPE_DIR.equals(doc.mimeType)) {
609                docsForSend.add(doc);
610            }
611        }
612
613        if (docsForSend.size() == 1) {
614            final DocumentInfo doc = docsForSend.get(0);
615
616            intent = new Intent(Intent.ACTION_SEND);
617            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
618            intent.addCategory(Intent.CATEGORY_DEFAULT);
619            intent.setType(doc.mimeType);
620            intent.putExtra(Intent.EXTRA_STREAM, doc.derivedUri);
621
622        } else if (docsForSend.size() > 1) {
623            intent = new Intent(Intent.ACTION_SEND_MULTIPLE);
624            intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
625            intent.addCategory(Intent.CATEGORY_DEFAULT);
626
627            final ArrayList<String> mimeTypes = Lists.newArrayList();
628            final ArrayList<Uri> uris = Lists.newArrayList();
629            for (DocumentInfo doc : docsForSend) {
630                mimeTypes.add(doc.mimeType);
631                uris.add(doc.derivedUri);
632            }
633
634            intent.setType(findCommonMimeType(mimeTypes));
635            intent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, uris);
636
637        } else {
638            return;
639        }
640
641        intent = Intent.createChooser(intent, getActivity().getText(R.string.share_via));
642        startActivity(intent);
643    }
644
645    private void onDeleteDocuments(List<DocumentInfo> docs) {
646        final Context context = getActivity();
647        final ContentResolver resolver = context.getContentResolver();
648
649        boolean hadTrouble = false;
650        for (DocumentInfo doc : docs) {
651            if (!doc.isDeleteSupported()) {
652                Log.w(TAG, "Skipping " + doc);
653                hadTrouble = true;
654                continue;
655            }
656
657            ContentProviderClient client = null;
658            try {
659                client = DocumentsApplication.acquireUnstableProviderOrThrow(
660                        resolver, doc.derivedUri.getAuthority());
661                DocumentsContract.deleteDocument(client, doc.derivedUri);
662            } catch (Exception e) {
663                Log.w(TAG, "Failed to delete " + doc);
664                hadTrouble = true;
665            } finally {
666                ContentProviderClient.releaseQuietly(client);
667            }
668        }
669
670        if (hadTrouble) {
671            Toast.makeText(context, R.string.toast_failed_delete, Toast.LENGTH_SHORT).show();
672        }
673    }
674
675    private void onCopyDocuments(List<DocumentInfo> docs) {
676        getDisplayState(this).selectedDocumentsForCopy = docs;
677
678        // Pop up a dialog to pick a destination.  This is inadequate but works for now.
679        // TODO: Implement a picker that is to spec.
680        final Intent intent = new Intent(
681                BaseActivity.DocumentsIntent.ACTION_OPEN_COPY_DESTINATION,
682                Uri.EMPTY,
683                getActivity(),
684                DocumentsActivity.class);
685        boolean directoryCopy = false;
686        for (DocumentInfo info : docs) {
687            if (Document.MIME_TYPE_DIR.equals(info.mimeType)) {
688                directoryCopy = true;
689                break;
690            }
691        }
692        intent.putExtra(BaseActivity.DocumentsIntent.EXTRA_DIRECTORY_COPY, directoryCopy);
693        startActivityForResult(intent, REQUEST_COPY_DESTINATION);
694    }
695
696    private static State getDisplayState(Fragment fragment) {
697        return ((BaseActivity) fragment.getActivity()).getDisplayState();
698    }
699
700    private static abstract class Footer {
701        private final int mItemViewType;
702
703        public Footer(int itemViewType) {
704            mItemViewType = itemViewType;
705        }
706
707        public abstract View getView(View convertView, ViewGroup parent);
708
709        public int getItemViewType() {
710            return mItemViewType;
711        }
712    }
713
714    private class LoadingFooter extends Footer {
715        public LoadingFooter() {
716            super(1);
717        }
718
719        @Override
720        public View getView(View convertView, ViewGroup parent) {
721            final Context context = parent.getContext();
722            final State state = getDisplayState(DirectoryFragment.this);
723
724            if (convertView == null) {
725                final LayoutInflater inflater = LayoutInflater.from(context);
726                if (state.derivedMode == MODE_LIST) {
727                    convertView = inflater.inflate(R.layout.item_loading_list, parent, false);
728                } else if (state.derivedMode == MODE_GRID) {
729                    convertView = inflater.inflate(R.layout.item_loading_grid, parent, false);
730                } else {
731                    throw new IllegalStateException();
732                }
733            }
734
735            return convertView;
736        }
737    }
738
739    private class MessageFooter extends Footer {
740        private final int mIcon;
741        private final String mMessage;
742
743        public MessageFooter(int itemViewType, int icon, String message) {
744            super(itemViewType);
745            mIcon = icon;
746            mMessage = message;
747        }
748
749        @Override
750        public View getView(View convertView, ViewGroup parent) {
751            final Context context = parent.getContext();
752            final State state = getDisplayState(DirectoryFragment.this);
753
754            if (convertView == null) {
755                final LayoutInflater inflater = LayoutInflater.from(context);
756                if (state.derivedMode == MODE_LIST) {
757                    convertView = inflater.inflate(R.layout.item_message_list, parent, false);
758                } else if (state.derivedMode == MODE_GRID) {
759                    convertView = inflater.inflate(R.layout.item_message_grid, parent, false);
760                } else {
761                    throw new IllegalStateException();
762                }
763            }
764
765            final ImageView icon = (ImageView) convertView.findViewById(android.R.id.icon);
766            final TextView title = (TextView) convertView.findViewById(android.R.id.title);
767            icon.setImageResource(mIcon);
768            title.setText(mMessage);
769            return convertView;
770        }
771    }
772
773    private class DocumentsAdapter extends BaseAdapter {
774        private Cursor mCursor;
775        private int mCursorCount;
776
777        private List<Footer> mFooters = Lists.newArrayList();
778
779        public void swapResult(DirectoryResult result) {
780            mCursor = result != null ? result.cursor : null;
781            mCursorCount = mCursor != null ? mCursor.getCount() : 0;
782
783            mFooters.clear();
784
785            final Bundle extras = mCursor != null ? mCursor.getExtras() : null;
786            if (extras != null) {
787                final String info = extras.getString(DocumentsContract.EXTRA_INFO);
788                if (info != null) {
789                    mFooters.add(new MessageFooter(2, R.drawable.ic_dialog_info, info));
790                }
791                final String error = extras.getString(DocumentsContract.EXTRA_ERROR);
792                if (error != null) {
793                    mFooters.add(new MessageFooter(3, R.drawable.ic_dialog_alert, error));
794                }
795                if (extras.getBoolean(DocumentsContract.EXTRA_LOADING, false)) {
796                    mFooters.add(new LoadingFooter());
797                }
798            }
799
800            if (result != null && result.exception != null) {
801                mFooters.add(new MessageFooter(
802                        3, R.drawable.ic_dialog_alert, getString(R.string.query_error)));
803            }
804
805            if (isEmpty()) {
806                mEmptyView.setVisibility(View.VISIBLE);
807            } else {
808                mEmptyView.setVisibility(View.GONE);
809            }
810
811            notifyDataSetChanged();
812        }
813
814        @Override
815        public View getView(int position, View convertView, ViewGroup parent) {
816            if (position < mCursorCount) {
817                return getDocumentView(position, convertView, parent);
818            } else {
819                position -= mCursorCount;
820                convertView = mFooters.get(position).getView(convertView, parent);
821                // Only the view itself is disabled; contents inside shouldn't
822                // be dimmed.
823                convertView.setEnabled(false);
824                return convertView;
825            }
826        }
827
828        private View getDocumentView(int position, View convertView, ViewGroup parent) {
829            final Context context = parent.getContext();
830            final State state = getDisplayState(DirectoryFragment.this);
831
832            final DocumentInfo doc = getArguments().getParcelable(EXTRA_DOC);
833
834            final RootsCache roots = DocumentsApplication.getRootsCache(context);
835            final ThumbnailCache thumbs = DocumentsApplication.getThumbnailsCache(
836                    context, mThumbSize);
837
838            if (convertView == null) {
839                final LayoutInflater inflater = LayoutInflater.from(context);
840                if (state.derivedMode == MODE_LIST) {
841                    convertView = inflater.inflate(R.layout.item_doc_list, parent, false);
842                } else if (state.derivedMode == MODE_GRID) {
843                    convertView = inflater.inflate(R.layout.item_doc_grid, parent, false);
844                } else {
845                    throw new IllegalStateException();
846                }
847            }
848
849            final Cursor cursor = getItem(position);
850
851            final String docAuthority = getCursorString(cursor, RootCursorWrapper.COLUMN_AUTHORITY);
852            final String docRootId = getCursorString(cursor, RootCursorWrapper.COLUMN_ROOT_ID);
853            final String docId = getCursorString(cursor, Document.COLUMN_DOCUMENT_ID);
854            final String docMimeType = getCursorString(cursor, Document.COLUMN_MIME_TYPE);
855            final String docDisplayName = getCursorString(cursor, Document.COLUMN_DISPLAY_NAME);
856            final long docLastModified = getCursorLong(cursor, Document.COLUMN_LAST_MODIFIED);
857            final int docIcon = getCursorInt(cursor, Document.COLUMN_ICON);
858            final int docFlags = getCursorInt(cursor, Document.COLUMN_FLAGS);
859            final String docSummary = getCursorString(cursor, Document.COLUMN_SUMMARY);
860            final long docSize = getCursorLong(cursor, Document.COLUMN_SIZE);
861
862            final View line1 = convertView.findViewById(R.id.line1);
863            final View line2 = convertView.findViewById(R.id.line2);
864
865            final ImageView iconMime = (ImageView) convertView.findViewById(R.id.icon_mime);
866            final ImageView iconThumb = (ImageView) convertView.findViewById(R.id.icon_thumb);
867            final TextView title = (TextView) convertView.findViewById(android.R.id.title);
868            final ImageView icon1 = (ImageView) convertView.findViewById(android.R.id.icon1);
869            final ImageView icon2 = (ImageView) convertView.findViewById(android.R.id.icon2);
870            final TextView summary = (TextView) convertView.findViewById(android.R.id.summary);
871            final TextView date = (TextView) convertView.findViewById(R.id.date);
872            final TextView size = (TextView) convertView.findViewById(R.id.size);
873
874            final ThumbnailAsyncTask oldTask = (ThumbnailAsyncTask) iconThumb.getTag();
875            if (oldTask != null) {
876                oldTask.preempt();
877                iconThumb.setTag(null);
878            }
879
880            iconMime.animate().cancel();
881            iconThumb.animate().cancel();
882
883            final boolean supportsThumbnail = (docFlags & Document.FLAG_SUPPORTS_THUMBNAIL) != 0;
884            final boolean allowThumbnail = (state.derivedMode == MODE_GRID)
885                    || MimePredicate.mimeMatches(MimePredicate.VISUAL_MIMES, docMimeType);
886            final boolean showThumbnail = supportsThumbnail && allowThumbnail && !mSvelteRecents;
887
888            final boolean enabled = isDocumentEnabled(docMimeType, docFlags);
889            final float iconAlpha = (state.derivedMode == MODE_LIST && !enabled) ? 0.5f : 1f;
890
891            boolean cacheHit = false;
892            if (showThumbnail) {
893                final Uri uri = DocumentsContract.buildDocumentUri(docAuthority, docId);
894                final Bitmap cachedResult = thumbs.get(uri);
895                if (cachedResult != null) {
896                    iconThumb.setImageBitmap(cachedResult);
897                    cacheHit = true;
898                } else {
899                    iconThumb.setImageDrawable(null);
900                    final ThumbnailAsyncTask task = new ThumbnailAsyncTask(
901                            uri, iconMime, iconThumb, mThumbSize, iconAlpha);
902                    iconThumb.setTag(task);
903                    ProviderExecutor.forAuthority(docAuthority).execute(task);
904                }
905            }
906
907            // Always throw MIME icon into place, even when a thumbnail is being
908            // loaded in background.
909            if (cacheHit) {
910                iconMime.setAlpha(0f);
911                iconMime.setImageDrawable(null);
912                iconThumb.setAlpha(1f);
913            } else {
914                iconMime.setAlpha(1f);
915                iconThumb.setAlpha(0f);
916                iconThumb.setImageDrawable(null);
917                if (docIcon != 0) {
918                    iconMime.setImageDrawable(
919                            IconUtils.loadPackageIcon(context, docAuthority, docIcon));
920                } else {
921                    iconMime.setImageDrawable(IconUtils.loadMimeIcon(
922                            context, docMimeType, docAuthority, docId, state.derivedMode));
923                }
924            }
925
926            boolean hasLine1 = false;
927            boolean hasLine2 = false;
928
929            final boolean hideTitle = (state.derivedMode == MODE_GRID) && mHideGridTitles;
930            if (!hideTitle) {
931                title.setText(docDisplayName);
932                hasLine1 = true;
933            }
934
935            Drawable iconDrawable = null;
936            if (mType == TYPE_RECENT_OPEN) {
937                // We've already had to enumerate roots before any results can
938                // be shown, so this will never block.
939                final RootInfo root = roots.getRootBlocking(docAuthority, docRootId);
940                if (state.derivedMode == MODE_GRID) {
941                    iconDrawable = root.loadGridIcon(context);
942                } else {
943                    iconDrawable = root.loadIcon(context);
944                }
945
946                if (summary != null) {
947                    final boolean alwaysShowSummary = getResources()
948                            .getBoolean(R.bool.always_show_summary);
949                    if (alwaysShowSummary) {
950                        summary.setText(root.getDirectoryString());
951                        summary.setVisibility(View.VISIBLE);
952                        hasLine2 = true;
953                    } else {
954                        if (iconDrawable != null && roots.isIconUniqueBlocking(root)) {
955                            // No summary needed if icon speaks for itself
956                            summary.setVisibility(View.INVISIBLE);
957                        } else {
958                            summary.setText(root.getDirectoryString());
959                            summary.setVisibility(View.VISIBLE);
960                            summary.setTextAlignment(TextView.TEXT_ALIGNMENT_TEXT_END);
961                            hasLine2 = true;
962                        }
963                    }
964                }
965            } else {
966                // Directories showing thumbnails in grid mode get a little icon
967                // hint to remind user they're a directory.
968                if (Document.MIME_TYPE_DIR.equals(docMimeType) && state.derivedMode == MODE_GRID
969                        && showThumbnail) {
970                    iconDrawable = IconUtils.applyTintAttr(context, R.drawable.ic_doc_folder,
971                            android.R.attr.textColorPrimaryInverse);
972                }
973
974                if (summary != null) {
975                    if (docSummary != null) {
976                        summary.setText(docSummary);
977                        summary.setVisibility(View.VISIBLE);
978                        hasLine2 = true;
979                    } else {
980                        summary.setVisibility(View.INVISIBLE);
981                    }
982                }
983            }
984
985            if (icon1 != null) icon1.setVisibility(View.GONE);
986            if (icon2 != null) icon2.setVisibility(View.GONE);
987
988            if (iconDrawable != null) {
989                if (hasLine1) {
990                    icon1.setVisibility(View.VISIBLE);
991                    icon1.setImageDrawable(iconDrawable);
992                } else {
993                    icon2.setVisibility(View.VISIBLE);
994                    icon2.setImageDrawable(iconDrawable);
995                }
996            }
997
998            if (docLastModified == -1) {
999                date.setText(null);
1000            } else {
1001                date.setText(formatTime(context, docLastModified));
1002                hasLine2 = true;
1003            }
1004
1005            if (state.showSize) {
1006                size.setVisibility(View.VISIBLE);
1007                if (Document.MIME_TYPE_DIR.equals(docMimeType) || docSize == -1) {
1008                    size.setText(null);
1009                } else {
1010                    size.setText(Formatter.formatFileSize(context, docSize));
1011                    hasLine2 = true;
1012                }
1013            } else {
1014                size.setVisibility(View.GONE);
1015            }
1016
1017            if (line1 != null) {
1018                line1.setVisibility(hasLine1 ? View.VISIBLE : View.GONE);
1019            }
1020            if (line2 != null) {
1021                line2.setVisibility(hasLine2 ? View.VISIBLE : View.GONE);
1022            }
1023
1024            setEnabledRecursive(convertView, enabled);
1025
1026            iconMime.setAlpha(iconAlpha);
1027            iconThumb.setAlpha(iconAlpha);
1028            if (icon1 != null) icon1.setAlpha(iconAlpha);
1029            if (icon2 != null) icon2.setAlpha(iconAlpha);
1030
1031            return convertView;
1032        }
1033
1034        @Override
1035        public int getCount() {
1036            return mCursorCount + mFooters.size();
1037        }
1038
1039        @Override
1040        public Cursor getItem(int position) {
1041            if (position < mCursorCount) {
1042                mCursor.moveToPosition(position);
1043                return mCursor;
1044            } else {
1045                return null;
1046            }
1047        }
1048
1049        @Override
1050        public long getItemId(int position) {
1051            return position;
1052        }
1053
1054        @Override
1055        public int getViewTypeCount() {
1056            return 4;
1057        }
1058
1059        @Override
1060        public int getItemViewType(int position) {
1061            if (position < mCursorCount) {
1062                return 0;
1063            } else {
1064                position -= mCursorCount;
1065                return mFooters.get(position).getItemViewType();
1066            }
1067        }
1068    }
1069
1070    private static class ThumbnailAsyncTask extends AsyncTask<Uri, Void, Bitmap>
1071            implements Preemptable {
1072        private final Uri mUri;
1073        private final ImageView mIconMime;
1074        private final ImageView mIconThumb;
1075        private final Point mThumbSize;
1076        private final float mTargetAlpha;
1077        private final CancellationSignal mSignal;
1078
1079        public ThumbnailAsyncTask(Uri uri, ImageView iconMime, ImageView iconThumb, Point thumbSize,
1080                float targetAlpha) {
1081            mUri = uri;
1082            mIconMime = iconMime;
1083            mIconThumb = iconThumb;
1084            mThumbSize = thumbSize;
1085            mTargetAlpha = targetAlpha;
1086            mSignal = new CancellationSignal();
1087        }
1088
1089        @Override
1090        public void preempt() {
1091            cancel(false);
1092            mSignal.cancel();
1093        }
1094
1095        @Override
1096        protected Bitmap doInBackground(Uri... params) {
1097            if (isCancelled()) return null;
1098
1099            final Context context = mIconThumb.getContext();
1100            final ContentResolver resolver = context.getContentResolver();
1101
1102            ContentProviderClient client = null;
1103            Bitmap result = null;
1104            try {
1105                client = DocumentsApplication.acquireUnstableProviderOrThrow(
1106                        resolver, mUri.getAuthority());
1107                result = DocumentsContract.getDocumentThumbnail(client, mUri, mThumbSize, mSignal);
1108                if (result != null) {
1109                    final ThumbnailCache thumbs = DocumentsApplication.getThumbnailsCache(
1110                            context, mThumbSize);
1111                    thumbs.put(mUri, result);
1112                }
1113            } catch (Exception e) {
1114                if (!(e instanceof OperationCanceledException)) {
1115                    Log.w(TAG, "Failed to load thumbnail for " + mUri + ": " + e);
1116                }
1117            } finally {
1118                ContentProviderClient.releaseQuietly(client);
1119            }
1120            return result;
1121        }
1122
1123        @Override
1124        protected void onPostExecute(Bitmap result) {
1125            if (mIconThumb.getTag() == this && result != null) {
1126                mIconThumb.setTag(null);
1127                mIconThumb.setImageBitmap(result);
1128
1129                mIconMime.setAlpha(mTargetAlpha);
1130                mIconMime.animate().alpha(0f).start();
1131                mIconThumb.setAlpha(0f);
1132                mIconThumb.animate().alpha(mTargetAlpha).start();
1133            }
1134        }
1135    }
1136
1137    private static String formatTime(Context context, long when) {
1138        // TODO: DateUtils should make this easier
1139        Time then = new Time();
1140        then.set(when);
1141        Time now = new Time();
1142        now.setToNow();
1143
1144        int flags = DateUtils.FORMAT_NO_NOON | DateUtils.FORMAT_NO_MIDNIGHT
1145                | DateUtils.FORMAT_ABBREV_ALL;
1146
1147        if (then.year != now.year) {
1148            flags |= DateUtils.FORMAT_SHOW_YEAR | DateUtils.FORMAT_SHOW_DATE;
1149        } else if (then.yearDay != now.yearDay) {
1150            flags |= DateUtils.FORMAT_SHOW_DATE;
1151        } else {
1152            flags |= DateUtils.FORMAT_SHOW_TIME;
1153        }
1154
1155        return DateUtils.formatDateTime(context, when, flags);
1156    }
1157
1158    private String findCommonMimeType(List<String> mimeTypes) {
1159        String[] commonType = mimeTypes.get(0).split("/");
1160        if (commonType.length != 2) {
1161            return "*/*";
1162        }
1163
1164        for (int i = 1; i < mimeTypes.size(); i++) {
1165            String[] type = mimeTypes.get(i).split("/");
1166            if (type.length != 2) continue;
1167
1168            if (!commonType[1].equals(type[1])) {
1169                commonType[1] = "*";
1170            }
1171
1172            if (!commonType[0].equals(type[0])) {
1173                commonType[0] = "*";
1174                commonType[1] = "*";
1175                break;
1176            }
1177        }
1178
1179        return commonType[0] + "/" + commonType[1];
1180    }
1181
1182    private void setEnabledRecursive(View v, boolean enabled) {
1183        if (v == null) return;
1184        if (v.isEnabled() == enabled) return;
1185        v.setEnabled(enabled);
1186
1187        if (v instanceof ViewGroup) {
1188            final ViewGroup vg = (ViewGroup) v;
1189            for (int i = vg.getChildCount() - 1; i >= 0; i--) {
1190                setEnabledRecursive(vg.getChildAt(i), enabled);
1191            }
1192        }
1193    }
1194
1195    private boolean isDocumentEnabled(String docMimeType, int docFlags) {
1196        final State state = getDisplayState(DirectoryFragment.this);
1197
1198        // Directories are always enabled
1199        if (Document.MIME_TYPE_DIR.equals(docMimeType)) {
1200            return true;
1201        }
1202
1203        // Read-only files are disabled when creating
1204        if (state.action == ACTION_CREATE && (docFlags & Document.FLAG_SUPPORTS_WRITE) == 0) {
1205            return false;
1206        }
1207
1208        return MimePredicate.mimeMatches(state.acceptMimes, docMimeType);
1209    }
1210}
1211