| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.documentsui.dirlist; |
| |
| import static com.android.documentsui.Shared.DEBUG; |
| import static com.android.documentsui.State.ACTION_MANAGE; |
| import static com.android.documentsui.State.MODE_GRID; |
| import static com.android.documentsui.State.MODE_LIST; |
| import static com.android.documentsui.State.MODE_UNKNOWN; |
| import static com.android.documentsui.State.SORT_ORDER_UNKNOWN; |
| import static com.android.documentsui.model.DocumentInfo.getCursorInt; |
| import static com.android.documentsui.model.DocumentInfo.getCursorString; |
| import static com.android.internal.util.Preconditions.checkNotNull; |
| import static com.android.internal.util.Preconditions.checkState; |
| import static com.google.common.base.Preconditions.checkArgument; |
| |
| import android.app.Activity; |
| import android.app.ActivityManager; |
| import android.app.Fragment; |
| import android.app.FragmentManager; |
| import android.app.FragmentTransaction; |
| import android.app.LoaderManager.LoaderCallbacks; |
| import android.content.ClipData; |
| import android.content.ContentResolver; |
| import android.content.ContentValues; |
| import android.content.Context; |
| import android.content.Intent; |
| import android.content.Loader; |
| import android.database.Cursor; |
| import android.graphics.Canvas; |
| import android.graphics.Point; |
| import android.graphics.drawable.Drawable; |
| import android.net.Uri; |
| import android.os.AsyncTask; |
| import android.os.Bundle; |
| import android.os.Parcelable; |
| import android.provider.DocumentsContract; |
| import android.provider.DocumentsContract.Document; |
| import android.support.annotation.Nullable; |
| import android.support.design.widget.Snackbar; |
| import android.support.v7.widget.GridLayoutManager; |
| import android.support.v7.widget.LinearLayoutManager; |
| import android.support.v7.widget.RecyclerView; |
| import android.support.v7.widget.RecyclerView.LayoutManager; |
| import android.support.v7.widget.RecyclerView.OnItemTouchListener; |
| import android.support.v7.widget.RecyclerView.RecyclerListener; |
| import android.support.v7.widget.RecyclerView.ViewHolder; |
| import android.text.TextUtils; |
| import android.util.Log; |
| import android.util.SparseArray; |
| import android.util.TypedValue; |
| import android.view.ActionMode; |
| import android.view.DragEvent; |
| import android.view.GestureDetector; |
| import android.view.LayoutInflater; |
| import android.view.Menu; |
| import android.view.MenuItem; |
| import android.view.MotionEvent; |
| import android.view.View; |
| import android.view.ViewGroup; |
| import android.view.ViewParent; |
| import android.widget.ImageView; |
| import android.widget.TextView; |
| |
| import com.android.documentsui.BaseActivity; |
| import com.android.documentsui.CopyService; |
| import com.android.documentsui.DirectoryLoader; |
| import com.android.documentsui.DirectoryResult; |
| import com.android.documentsui.DocumentClipper; |
| import com.android.documentsui.DocumentsActivity; |
| import com.android.documentsui.DocumentsApplication; |
| import com.android.documentsui.Events; |
| import com.android.documentsui.Menus; |
| import com.android.documentsui.MessageBar; |
| import com.android.documentsui.MimePredicate; |
| import com.android.documentsui.R; |
| import com.android.documentsui.RecentLoader; |
| import com.android.documentsui.RecentsProvider; |
| import com.android.documentsui.RecentsProvider.StateColumns; |
| import com.android.documentsui.RootsCache; |
| import com.android.documentsui.Shared; |
| import com.android.documentsui.Snackbars; |
| import com.android.documentsui.State; |
| import com.android.documentsui.dirlist.MultiSelectManager.Selection; |
| import com.android.documentsui.model.DocumentInfo; |
| import com.android.documentsui.model.DocumentStack; |
| import com.android.documentsui.model.RootInfo; |
| import com.google.common.collect.Lists; |
| import com.google.common.collect.Sets; |
| |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Set; |
| |
| /** |
| * Display the documents inside a single directory. |
| */ |
| public class DirectoryFragment extends Fragment { |
| |
| public static final int TYPE_NORMAL = 1; |
| public static final int TYPE_SEARCH = 2; |
| public static final int TYPE_RECENT_OPEN = 3; |
| |
| public static final int ANIM_NONE = 1; |
| public static final int ANIM_SIDE = 2; |
| public static final int ANIM_DOWN = 3; |
| public static final int ANIM_UP = 4; |
| |
| public static final int REQUEST_COPY_DESTINATION = 1; |
| |
| private static final String TAG = "DirectoryFragment"; |
| |
| private static final int LOADER_ID = 42; |
| private static final boolean DEBUG_ENABLE_DND = true; |
| |
| private static final String EXTRA_TYPE = "type"; |
| private static final String EXTRA_ROOT = "root"; |
| private static final String EXTRA_DOC = "doc"; |
| private static final String EXTRA_QUERY = "query"; |
| private static final String EXTRA_IGNORE_STATE = "ignoreState"; |
| |
| private Model mModel; |
| private MultiSelectManager mSelectionManager; |
| private Model.UpdateListener mModelUpdateListener = new ModelUpdateListener(); |
| private ItemClickListener mItemClickListener = new ItemClickListener(); |
| |
| private IconHelper mIconHelper; |
| |
| private View mEmptyView; |
| private RecyclerView mRecView; |
| |
| private int mType = TYPE_NORMAL; |
| private String mStateKey; |
| |
| private int mLastMode = MODE_UNKNOWN; |
| private int mLastSortOrder = SORT_ORDER_UNKNOWN; |
| private boolean mLastShowSize; |
| private DocumentsAdapter mAdapter; |
| private LoaderCallbacks<DirectoryResult> mCallbacks; |
| private FragmentTuner mTuner; |
| private DocumentClipper mClipper; |
| // These are lazily initialized. |
| private LinearLayoutManager mListLayout; |
| private GridLayoutManager mGridLayout; |
| private int mColumnCount = 1; // This will get updated when layout changes. |
| |
| private MessageBar mMessageBar; |
| private View mProgressBar; |
| |
| public static void showNormal(FragmentManager fm, RootInfo root, DocumentInfo doc, int anim) { |
| show(fm, TYPE_NORMAL, root, doc, null, anim); |
| } |
| |
| public static void showSearch(FragmentManager fm, RootInfo root, String query, int anim) { |
| show(fm, TYPE_SEARCH, root, null, query, anim); |
| } |
| |
| public static void showRecentsOpen(FragmentManager fm, int anim) { |
| show(fm, TYPE_RECENT_OPEN, null, null, null, anim); |
| } |
| |
| private static void show(FragmentManager fm, int type, RootInfo root, DocumentInfo doc, |
| String query, int anim) { |
| final Bundle args = new Bundle(); |
| args.putInt(EXTRA_TYPE, type); |
| args.putParcelable(EXTRA_ROOT, root); |
| args.putParcelable(EXTRA_DOC, doc); |
| args.putString(EXTRA_QUERY, query); |
| |
| final FragmentTransaction ft = fm.beginTransaction(); |
| switch (anim) { |
| case ANIM_SIDE: |
| args.putBoolean(EXTRA_IGNORE_STATE, true); |
| break; |
| case ANIM_DOWN: |
| args.putBoolean(EXTRA_IGNORE_STATE, true); |
| ft.setCustomAnimations(R.animator.dir_down, R.animator.dir_frozen); |
| break; |
| case ANIM_UP: |
| ft.setCustomAnimations(R.animator.dir_frozen, R.animator.dir_up); |
| break; |
| } |
| |
| final DirectoryFragment fragment = new DirectoryFragment(); |
| fragment.setArguments(args); |
| |
| ft.replace(R.id.container_directory, fragment); |
| ft.commitAllowingStateLoss(); |
| } |
| |
| private static String buildStateKey(RootInfo root, DocumentInfo doc) { |
| final StringBuilder builder = new StringBuilder(); |
| builder.append(root != null ? root.authority : "null").append(';'); |
| builder.append(root != null ? root.rootId : "null").append(';'); |
| builder.append(doc != null ? doc.documentId : "null"); |
| return builder.toString(); |
| } |
| |
| public static @Nullable DirectoryFragment get(FragmentManager fm) { |
| // TODO: deal with multiple directories shown at once |
| Fragment fragment = fm.findFragmentById(R.id.container_directory); |
| return fragment instanceof DirectoryFragment |
| ? (DirectoryFragment) fragment |
| : null; |
| } |
| |
| @Override |
| public View onCreateView( |
| LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { |
| final View view = inflater.inflate(R.layout.fragment_directory, container, false); |
| |
| mMessageBar = MessageBar.create(getChildFragmentManager()); |
| mProgressBar = view.findViewById(R.id.progressbar); |
| |
| mEmptyView = view.findViewById(android.R.id.empty); |
| |
| mRecView = (RecyclerView) view.findViewById(R.id.list); |
| mRecView.setRecyclerListener( |
| new RecyclerListener() { |
| @Override |
| public void onViewRecycled(ViewHolder holder) { |
| cancelThumbnailTask(holder.itemView); |
| } |
| }); |
| |
| // TODO: Rather than update columns on layout changes, push this |
| // code (or something like it) into GridLayoutManager. |
| mRecView.addOnLayoutChangeListener( |
| new View.OnLayoutChangeListener() { |
| |
| @Override |
| public void onLayoutChange( |
| View v, int left, int top, int right, int bottom, int oldLeft, |
| int oldTop, int oldRight, int oldBottom) { |
| mColumnCount = calculateColumnCount(); |
| if (mGridLayout != null) { |
| mGridLayout.setSpanCount(mColumnCount); |
| } |
| } |
| }); |
| |
| mRecView.setItemAnimator(new DirectoryItemAnimator(getActivity())); |
| |
| // TODO: Add a divider between views (which might use RecyclerView.ItemDecoration). |
| if (DEBUG_ENABLE_DND) { |
| setupDragAndDropOnDirectoryView(mRecView); |
| } |
| |
| return view; |
| } |
| |
| @Override |
| public void onDestroyView() { |
| super.onDestroyView(); |
| |
| // Cancel any outstanding thumbnail requests |
| final int count = mRecView.getChildCount(); |
| for (int i = 0; i < count; i++) { |
| final View view = mRecView.getChildAt(i); |
| cancelThumbnailTask(view); |
| } |
| |
| // Clear any outstanding selection |
| mSelectionManager.clearSelection(); |
| } |
| |
| @Override |
| public void onActivityCreated(Bundle savedInstanceState) { |
| super.onActivityCreated(savedInstanceState); |
| |
| final Context context = getActivity(); |
| final State state = getDisplayState(); |
| |
| final RootInfo root = getArguments().getParcelable(EXTRA_ROOT); |
| final DocumentInfo doc = getArguments().getParcelable(EXTRA_DOC); |
| |
| mAdapter = new DocumentsAdapter(); |
| mRecView.setAdapter(mAdapter); |
| |
| GestureDetector.SimpleOnGestureListener listener = |
| new GestureDetector.SimpleOnGestureListener() { |
| @Override |
| public boolean onSingleTapUp(MotionEvent e) { |
| return DirectoryFragment.this.onSingleTapUp(e); |
| } |
| @Override |
| public boolean onDoubleTap(MotionEvent e) { |
| Log.d(TAG, "Handling double tap."); |
| return DirectoryFragment.this.onDoubleTap(e); |
| } |
| }; |
| |
| final GestureDetector detector = new GestureDetector(this.getContext(), listener); |
| detector.setOnDoubleTapListener(listener); |
| |
| mRecView.addOnItemTouchListener( |
| new OnItemTouchListener() { |
| @Override |
| public boolean onInterceptTouchEvent(RecyclerView rv, MotionEvent e) { |
| detector.onTouchEvent(e); |
| return false; |
| } |
| |
| @Override |
| public void onTouchEvent(RecyclerView rv, MotionEvent e) {} |
| |
| @Override |
| public void onRequestDisallowInterceptTouchEvent(boolean disallowIntercept) {} |
| }); |
| |
| // TODO: instead of inserting the view into the constructor, extract listener-creation code |
| // and set the listener on the view after the fact. Then the view doesn't need to be passed |
| // into the selection manager. |
| mSelectionManager = new MultiSelectManager( |
| mRecView, |
| state.allowMultiple |
| ? MultiSelectManager.MODE_MULTIPLE |
| : MultiSelectManager.MODE_SINGLE); |
| mSelectionManager.addCallback(new SelectionModeListener()); |
| |
| mModel = new Model(context, mAdapter); |
| mModel.addUpdateListener(mAdapter); |
| mModel.addUpdateListener(mModelUpdateListener); |
| |
| mType = getArguments().getInt(EXTRA_TYPE); |
| mStateKey = buildStateKey(root, doc); |
| |
| mTuner = FragmentTuner.pick(state); |
| mClipper = new DocumentClipper(context); |
| |
| mIconHelper = new IconHelper(context, state.derivedMode); |
| |
| boolean hideGridTitles; |
| if (mType == TYPE_RECENT_OPEN) { |
| // Hide titles when showing recents for picking images/videos |
| hideGridTitles = MimePredicate.mimeMatches( |
| MimePredicate.VISUAL_MIMES, state.acceptMimes); |
| } else { |
| hideGridTitles = (doc != null) && doc.isGridTitlesHidden(); |
| } |
| GridDocumentHolder.setHideTitles(hideGridTitles); |
| |
| final ActivityManager am = (ActivityManager) context.getSystemService( |
| Context.ACTIVITY_SERVICE); |
| boolean svelte = am.isLowRamDevice() && (mType == TYPE_RECENT_OPEN); |
| mIconHelper.setThumbnailsEnabled(!svelte); |
| |
| mCallbacks = new LoaderCallbacks<DirectoryResult>() { |
| @Override |
| public Loader<DirectoryResult> onCreateLoader(int id, Bundle args) { |
| final String query = getArguments().getString(EXTRA_QUERY); |
| |
| Uri contentsUri; |
| switch (mType) { |
| case TYPE_NORMAL: |
| contentsUri = DocumentsContract.buildChildDocumentsUri( |
| doc.authority, doc.documentId); |
| if (state.action == ACTION_MANAGE) { |
| contentsUri = DocumentsContract.setManageMode(contentsUri); |
| } |
| return new DirectoryLoader( |
| context, mType, root, doc, contentsUri, state.userSortOrder); |
| case TYPE_SEARCH: |
| contentsUri = DocumentsContract.buildSearchDocumentsUri( |
| root.authority, root.rootId, query); |
| if (state.action == ACTION_MANAGE) { |
| contentsUri = DocumentsContract.setManageMode(contentsUri); |
| } |
| return new DirectoryLoader( |
| context, mType, root, doc, contentsUri, state.userSortOrder); |
| case TYPE_RECENT_OPEN: |
| final RootsCache roots = DocumentsApplication.getRootsCache(context); |
| return new RecentLoader(context, roots, state); |
| default: |
| throw new IllegalStateException("Unknown type " + mType); |
| } |
| } |
| |
| @Override |
| public void onLoadFinished(Loader<DirectoryResult> loader, DirectoryResult result) { |
| if (!isAdded()) return; |
| |
| mModel.update(result); |
| |
| // Push latest state up to UI |
| // TODO: if mode change was racing with us, don't overwrite it |
| if (result.mode != MODE_UNKNOWN) { |
| state.derivedMode = result.mode; |
| } |
| state.derivedSortOrder = result.sortOrder; |
| ((BaseActivity) context).onStateChanged(); |
| |
| updateDisplayState(); |
| |
| // When launched into empty recents, show drawer |
| if (mType == TYPE_RECENT_OPEN && mModel.isEmpty() && !state.stackTouched && |
| context instanceof DocumentsActivity) { |
| ((DocumentsActivity) context).setRootsDrawerOpen(true); |
| } |
| |
| // Restore any previous instance state |
| final SparseArray<Parcelable> container = state.dirState.remove(mStateKey); |
| if (container != null && !getArguments().getBoolean(EXTRA_IGNORE_STATE, false)) { |
| getView().restoreHierarchyState(container); |
| } else if (mLastSortOrder != state.derivedSortOrder) { |
| // The derived sort order takes the user sort order into account, but applies |
| // directory-specific defaults when the user doesn't explicitly set the sort |
| // order. Scroll to the top if the sort order actually changed. |
| mRecView.smoothScrollToPosition(0); |
| } |
| |
| mLastSortOrder = state.derivedSortOrder; |
| } |
| |
| @Override |
| public void onLoaderReset(Loader<DirectoryResult> loader) { |
| mModel.update(null); |
| } |
| }; |
| |
| // Kick off loader at least once |
| getLoaderManager().restartLoader(LOADER_ID, null, mCallbacks); |
| |
| updateDisplayState(); |
| } |
| |
| @Override |
| public void onActivityResult(int requestCode, int resultCode, Intent data) { |
| // There's only one request code right now. Replace this with a switch statement or |
| // something more scalable when more codes are added. |
| if (requestCode != REQUEST_COPY_DESTINATION) { |
| return; |
| } |
| if (resultCode == Activity.RESULT_CANCELED || data == null) { |
| // User pressed the back button or otherwise cancelled the destination pick. Don't |
| // proceed with the copy. |
| return; |
| } |
| |
| CopyService.start(getActivity(), getDisplayState().selectedDocumentsForCopy, |
| (DocumentStack) data.getParcelableExtra(Shared.EXTRA_STACK), |
| data.getIntExtra(CopyService.EXTRA_TRANSFER_MODE, CopyService.TRANSFER_MODE_COPY)); |
| } |
| |
| private boolean onSingleTapUp(MotionEvent e) { |
| // Only respond to touch events. Single-click mouse events are selection events and are |
| // handled by the selection manager. Tap events that occur while the selection manager is |
| // active are also selection events. |
| if (Events.isTouchEvent(e) && !mSelectionManager.hasSelection()) { |
| String id = getModelId(e); |
| if (id != null) { |
| return handleViewItem(id); |
| } |
| } |
| return false; |
| } |
| |
| protected boolean onDoubleTap(MotionEvent e) { |
| if (Events.isMouseEvent(e)) { |
| Log.d(TAG, "Handling double tap from mouse."); |
| String id = getModelId(e); |
| if (id != null) { |
| return handleViewItem(id); |
| } |
| } |
| return false; |
| } |
| |
| private boolean handleViewItem(String id) { |
| final Cursor cursor = mModel.getItem(id); |
| checkNotNull(cursor, "Cursor cannot be null."); |
| final String docMimeType = getCursorString(cursor, Document.COLUMN_MIME_TYPE); |
| final int docFlags = getCursorInt(cursor, Document.COLUMN_FLAGS); |
| if (mTuner.isDocumentEnabled(docMimeType, docFlags)) { |
| final DocumentInfo doc = DocumentInfo.fromDirectoryCursor(cursor); |
| ((BaseActivity) getActivity()).onDocumentPicked(doc, mModel); |
| mSelectionManager.clearSelection(); |
| return true; |
| } |
| return false; |
| } |
| |
| @Override |
| public void onStop() { |
| super.onStop(); |
| |
| // Remember last scroll location |
| final SparseArray<Parcelable> container = new SparseArray<Parcelable>(); |
| getView().saveHierarchyState(container); |
| final State state = getDisplayState(); |
| state.dirState.put(mStateKey, container); |
| } |
| |
| @Override |
| public void onResume() { |
| super.onResume(); |
| updateDisplayState(); |
| } |
| |
| public void onDisplayStateChanged() { |
| updateDisplayState(); |
| } |
| |
| public void onUserSortOrderChanged() { |
| // Sort order change always triggers reload; we'll trigger state change |
| // on the flip side. |
| getLoaderManager().restartLoader(LOADER_ID, null, mCallbacks); |
| } |
| |
| public void onUserModeChanged() { |
| final ContentResolver resolver = getActivity().getContentResolver(); |
| final State state = getDisplayState(); |
| |
| final RootInfo root = getArguments().getParcelable(EXTRA_ROOT); |
| final DocumentInfo doc = getArguments().getParcelable(EXTRA_DOC); |
| |
| if (root != null && doc != null) { |
| final Uri stateUri = RecentsProvider.buildState( |
| root.authority, root.rootId, doc.documentId); |
| final ContentValues values = new ContentValues(); |
| values.put(StateColumns.MODE, state.userMode); |
| |
| new AsyncTask<Void, Void, Void>() { |
| @Override |
| protected Void doInBackground(Void... params) { |
| resolver.insert(stateUri, values); |
| return null; |
| } |
| }.execute(); |
| } |
| |
| // Mode change is just visual change; no need to kick loader, and |
| // deliver change event immediately. |
| state.derivedMode = state.userMode; |
| ((BaseActivity) getActivity()).onStateChanged(); |
| |
| updateDisplayState(); |
| } |
| |
| private void updateDisplayState() { |
| final State state = getDisplayState(); |
| |
| if (mLastMode == state.derivedMode && mLastShowSize == state.showSize) return; |
| mLastMode = state.derivedMode; |
| mLastShowSize = state.showSize; |
| |
| updateLayout(state.derivedMode); |
| |
| mRecView.setAdapter(mAdapter); |
| } |
| |
| /** |
| * Returns a {@code LayoutManager} for {@code mode}, lazily initializing |
| * classes as needed. |
| */ |
| private void updateLayout(int mode) { |
| final LayoutManager layout; |
| switch (mode) { |
| case MODE_GRID: |
| if (mGridLayout == null) { |
| mGridLayout = new GridLayoutManager(getContext(), mColumnCount); |
| mGridLayout.setSpanSizeLookup(mAdapter.createSpanSizeLookup()); |
| } |
| layout = mGridLayout; |
| break; |
| case MODE_LIST: |
| if (mListLayout == null) { |
| mListLayout = new LinearLayoutManager(getContext()); |
| } |
| layout = mListLayout; |
| break; |
| case MODE_UNKNOWN: |
| default: |
| throw new IllegalArgumentException("Unsupported layout mode: " + mode); |
| } |
| |
| mRecView.setLayoutManager(layout); |
| // TODO: Once b/23691541 is resolved, use a listener within MultiSelectManager instead of |
| // imperatively calling this function. |
| mSelectionManager.handleLayoutChanged(); |
| // setting layout manager automatically invalidates existing ViewHolders. |
| mIconHelper.setMode(mode); |
| } |
| |
| private int calculateColumnCount() { |
| int cellWidth = getResources().getDimensionPixelSize(R.dimen.grid_width); |
| int cellMargin = 2 * getResources().getDimensionPixelSize(R.dimen.grid_item_margin); |
| int viewPadding = mRecView.getPaddingLeft() + mRecView.getPaddingRight(); |
| |
| checkState(mRecView.getWidth() > 0); |
| int columnCount = Math.max(1, |
| (mRecView.getWidth() - viewPadding) / (cellWidth + cellMargin)); |
| |
| return columnCount; |
| } |
| |
| /** |
| * Manages the integration between our ActionMode and MultiSelectManager, initiating |
| * ActionMode when there is a selection, canceling it when there is no selection, |
| * and clearing selection when action mode is explicitly exited by the user. |
| */ |
| private final class SelectionModeListener |
| implements MultiSelectManager.Callback, ActionMode.Callback { |
| |
| private Selection mSelected = new Selection(); |
| private ActionMode mActionMode; |
| private int mNoDeleteCount = 0; |
| private Menu mMenu; |
| |
| @Override |
| public boolean onBeforeItemStateChange(String modelId, boolean selected) { |
| if (selected) { |
| final Cursor cursor = mModel.getItem(modelId); |
| checkNotNull(cursor, "Cursor cannot be null."); |
| final String docMimeType = getCursorString(cursor, Document.COLUMN_MIME_TYPE); |
| final int docFlags = getCursorInt(cursor, Document.COLUMN_FLAGS); |
| return mTuner.canSelectType(docMimeType, docFlags); |
| } |
| return true; |
| } |
| |
| @Override |
| public void onItemStateChanged(String modelId, boolean selected) { |
| final Cursor cursor = mModel.getItem(modelId); |
| checkNotNull(cursor, "Cursor cannot be null."); |
| |
| final int docFlags = getCursorInt(cursor, Document.COLUMN_FLAGS); |
| if ((docFlags & Document.FLAG_SUPPORTS_DELETE) == 0) { |
| mNoDeleteCount += selected ? 1 : -1; |
| } |
| } |
| |
| @Override |
| public void onSelectionChanged() { |
| mSelectionManager.getSelection(mSelected); |
| TypedValue color = new TypedValue(); |
| if (mSelected.size() > 0) { |
| if (DEBUG) Log.d(TAG, "Maybe starting action mode."); |
| if (mActionMode == null) { |
| if (DEBUG) Log.d(TAG, "Yeah. Starting action mode."); |
| mActionMode = getActivity().startActionMode(this); |
| } |
| getActivity().getTheme().resolveAttribute(R.attr.colorActionMode, color, true); |
| updateActionMenu(); |
| } else { |
| if (DEBUG) Log.d(TAG, "Finishing action mode."); |
| if (mActionMode != null) { |
| mActionMode.finish(); |
| } |
| getActivity().getTheme().resolveAttribute( |
| android.R.attr.colorPrimaryDark, color, true); |
| } |
| getActivity().getWindow().setStatusBarColor(color.data); |
| |
| if (mActionMode != null) { |
| mActionMode.setTitle(String.valueOf(mSelected.size())); |
| } |
| } |
| |
| // Called when the user exits the action mode |
| @Override |
| public void onDestroyActionMode(ActionMode mode) { |
| if (DEBUG) Log.d(TAG, "Handling action mode destroyed."); |
| mActionMode = null; |
| // clear selection |
| mSelectionManager.clearSelection(); |
| mSelected.clear(); |
| mNoDeleteCount = 0; |
| } |
| |
| @Override |
| public boolean onCreateActionMode(ActionMode mode, Menu menu) { |
| int size = mSelectionManager.getSelection().size(); |
| mode.getMenuInflater().inflate(R.menu.mode_directory, menu); |
| mode.setTitle(TextUtils.formatSelectedCount(size)); |
| return (size > 0); |
| } |
| |
| @Override |
| public boolean onPrepareActionMode(ActionMode mode, Menu menu) { |
| mMenu = menu; |
| updateActionMenu(); |
| return true; |
| } |
| |
| private void updateActionMenu() { |
| checkNotNull(mMenu); |
| // Delegate update logic to our owning action, since specialized logic is desired. |
| mTuner.updateActionMenu(mMenu, mType, mNoDeleteCount == 0); |
| Menus.disableHiddenItems(mMenu); |
| } |
| |
| @Override |
| public boolean onActionItemClicked(ActionMode mode, MenuItem item) { |
| |
| Selection selection = mSelectionManager.getSelection(new Selection()); |
| |
| switch (item.getItemId()) { |
| case R.id.menu_open: |
| openDocuments(selection); |
| mode.finish(); |
| return true; |
| |
| case R.id.menu_share: |
| shareDocuments(selection); |
| mode.finish(); |
| return true; |
| |
| case R.id.menu_delete: |
| // Exit selection mode first, so we avoid deselecting deleted documents. |
| mode.finish(); |
| deleteDocuments(selection); |
| return true; |
| |
| case R.id.menu_copy_to: |
| transferDocuments(selection, CopyService.TRANSFER_MODE_COPY); |
| mode.finish(); |
| return true; |
| |
| case R.id.menu_move_to: |
| // Exit selection mode first, so we avoid deselecting deleted documents. |
| mode.finish(); |
| transferDocuments(selection, CopyService.TRANSFER_MODE_MOVE); |
| return true; |
| |
| case R.id.menu_copy_to_clipboard: |
| if (!selection.isEmpty()) { |
| copySelectionToClipboard(selection); |
| } |
| return true; |
| |
| case R.id.menu_select_all: |
| selectAllFiles(); |
| return true; |
| |
| default: |
| if (DEBUG) Log.d(TAG, "Unhandled menu item selected: " + item); |
| return false; |
| } |
| } |
| } |
| |
| private void cancelThumbnailTask(View view) { |
| final ImageView iconThumb = (ImageView) view.findViewById(R.id.icon_thumb); |
| if (iconThumb != null) { |
| mIconHelper.stopLoading(iconThumb); |
| } |
| } |
| |
| private void openDocuments(final Selection selected) { |
| new GetDocumentsTask() { |
| @Override |
| void onDocumentsReady(List<DocumentInfo> docs) { |
| // TODO: Implement support in Files activity for opening multiple docs. |
| BaseActivity.get(DirectoryFragment.this).onDocumentsPicked(docs); |
| } |
| }.execute(selected); |
| } |
| |
| private void shareDocuments(final Selection selected) { |
| new GetDocumentsTask() { |
| @Override |
| void onDocumentsReady(List<DocumentInfo> docs) { |
| Intent intent; |
| |
| // Filter out directories - those can't be shared. |
| List<DocumentInfo> docsForSend = new ArrayList<>(); |
| for (DocumentInfo doc: docs) { |
| if (!Document.MIME_TYPE_DIR.equals(doc.mimeType)) { |
| docsForSend.add(doc); |
| } |
| } |
| |
| if (docsForSend.size() == 1) { |
| final DocumentInfo doc = docsForSend.get(0); |
| |
| intent = new Intent(Intent.ACTION_SEND); |
| intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION); |
| intent.addCategory(Intent.CATEGORY_DEFAULT); |
| intent.setType(doc.mimeType); |
| intent.putExtra(Intent.EXTRA_STREAM, doc.derivedUri); |
| |
| } else if (docsForSend.size() > 1) { |
| intent = new Intent(Intent.ACTION_SEND_MULTIPLE); |
| intent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION); |
| intent.addCategory(Intent.CATEGORY_DEFAULT); |
| |
| final ArrayList<String> mimeTypes = new ArrayList<>(); |
| final ArrayList<Uri> uris = new ArrayList<>(); |
| for (DocumentInfo doc : docsForSend) { |
| mimeTypes.add(doc.mimeType); |
| uris.add(doc.derivedUri); |
| } |
| |
| intent.setType(findCommonMimeType(mimeTypes)); |
| intent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, uris); |
| |
| } else { |
| return; |
| } |
| |
| intent = Intent.createChooser(intent, getActivity().getText(R.string.share_via)); |
| startActivity(intent); |
| } |
| }.execute(selected); |
| } |
| |
| private void deleteDocuments(final Selection selected) { |
| Context context = getActivity(); |
| String message = Shared.getQuantityString(context, R.plurals.deleting, selected.size()); |
| |
| // Hide the files in the UI. |
| final SparseArray<String> toDelete = mAdapter.hide(selected.getAll()); |
| |
| // Show a snackbar informing the user that files will be deleted, and give them an option to |
| // cancel. |
| final Activity activity = getActivity(); |
| Snackbars.makeSnackbar(activity, message, Snackbar.LENGTH_LONG) |
| .setAction( |
| R.string.undo, |
| new View.OnClickListener() { |
| @Override |
| public void onClick(View view) {} |
| }) |
| .setCallback( |
| new Snackbar.Callback() { |
| @Override |
| public void onDismissed(Snackbar snackbar, int event) { |
| if (event == Snackbar.Callback.DISMISS_EVENT_ACTION) { |
| // If the delete was cancelled, just unhide the files. |
| mAdapter.unhide(toDelete); |
| } else { |
| // Actually kick off the delete. |
| mModel.delete( |
| selected, |
| new Model.DeletionListener() { |
| @Override |
| public void onError() { |
| Snackbars.makeSnackbar( |
| activity, |
| R.string.toast_failed_delete, |
| Snackbar.LENGTH_LONG) |
| .show(); |
| |
| } |
| }); |
| } |
| } |
| }) |
| .show(); |
| } |
| |
| private void transferDocuments(final Selection selected, final int mode) { |
| // Pop up a dialog to pick a destination. This is inadequate but works for now. |
| // TODO: Implement a picker that is to spec. |
| final Intent intent = new Intent( |
| Shared.ACTION_PICK_COPY_DESTINATION, |
| Uri.EMPTY, |
| getActivity(), |
| DocumentsActivity.class); |
| |
| new GetDocumentsTask() { |
| @Override |
| void onDocumentsReady(List<DocumentInfo> docs) { |
| getDisplayState().selectedDocumentsForCopy = docs; |
| |
| boolean directoryCopy = false; |
| for (DocumentInfo info : docs) { |
| if (Document.MIME_TYPE_DIR.equals(info.mimeType)) { |
| directoryCopy = true; |
| break; |
| } |
| } |
| intent.putExtra(Shared.EXTRA_DIRECTORY_COPY, directoryCopy); |
| intent.putExtra(CopyService.EXTRA_TRANSFER_MODE, mode); |
| startActivityForResult(intent, REQUEST_COPY_DESTINATION); |
| } |
| }.execute(selected); |
| } |
| |
| private State getDisplayState() { |
| return ((BaseActivity) getActivity()).getDisplayState(); |
| } |
| |
| void showEmptyView() { |
| mEmptyView.setVisibility(View.VISIBLE); |
| mRecView.setVisibility(View.GONE); |
| TextView msg = (TextView) mEmptyView.findViewById(R.id.message); |
| msg.setText(R.string.empty); |
| // No retry button for the empty view. |
| mEmptyView.findViewById(R.id.button_retry).setVisibility(View.GONE); |
| } |
| |
| void showErrorView() { |
| mEmptyView.setVisibility(View.VISIBLE); |
| mRecView.setVisibility(View.GONE); |
| TextView msg = (TextView) mEmptyView.findViewById(R.id.message); |
| msg.setText(R.string.query_error); |
| // TODO: Enable this once the retry button does something. |
| mEmptyView.findViewById(R.id.button_retry).setVisibility(View.GONE); |
| } |
| |
| void showRecyclerView() { |
| mEmptyView.setVisibility(View.GONE); |
| mRecView.setVisibility(View.VISIBLE); |
| } |
| |
| final class DocumentsAdapter |
| extends RecyclerView.Adapter<DocumentHolder> |
| implements Model.UpdateListener { |
| |
| private static final String TAG = "DocumentsAdapter"; |
| public static final int ITEM_TYPE_LAYOUT_DIVIDER = 0; |
| public static final int ITEM_TYPE_DOCUMENT = 1; |
| public static final int ITEM_TYPE_DIRECTORY = 2; |
| |
| /** |
| * An ordered list of model IDs. This is the data structure that determines what shows up in |
| * the UI, and where. |
| */ |
| private List<String> mModelIds = new ArrayList<>(); |
| |
| // The list is divided into two segments - directories, and everything else. Record the |
| // position where the transition happens. |
| private int mDividerPosition; |
| |
| public GridLayoutManager.SpanSizeLookup createSpanSizeLookup() { |
| return new GridLayoutManager.SpanSizeLookup() { |
| @Override |
| public int getSpanSize(int position) { |
| // Make layout whitespace span the grid. This has the effect of breaking |
| // grid rows whenever layout whitespace is encountered. |
| if (getItemViewType(position) == ITEM_TYPE_LAYOUT_DIVIDER) { |
| return mColumnCount; |
| } else { |
| return 1; |
| } |
| } |
| }; |
| } |
| |
| @Override |
| public DocumentHolder onCreateViewHolder(ViewGroup parent, int viewType) { |
| if (viewType == ITEM_TYPE_LAYOUT_DIVIDER) { |
| return new EmptyDocumentHolder(getContext()); |
| }; |
| |
| DocumentHolder holder = null; |
| final State state = getDisplayState(); |
| switch (state.derivedMode) { |
| case MODE_GRID: |
| switch (viewType) { |
| case ITEM_TYPE_DIRECTORY: |
| holder = new GridDirectoryHolder(getContext(), parent); |
| break; |
| case ITEM_TYPE_DOCUMENT: |
| holder = new GridDocumentHolder(getContext(), parent, mIconHelper); |
| break; |
| default: |
| throw new IllegalStateException("Unsupported layout type."); |
| } |
| break; |
| case MODE_LIST: |
| holder = new ListDocumentHolder(getContext(), parent, mIconHelper); |
| break; |
| case MODE_UNKNOWN: |
| default: |
| throw new IllegalStateException("Unsupported layout mode."); |
| } |
| |
| holder.addClickListener(mItemClickListener); |
| holder.addOnKeyListener(mSelectionManager); |
| return holder; |
| } |
| |
| /** |
| * Deal with selection changed events by using a custom ItemAnimator that just changes the |
| * background color. This works around focus issues (otherwise items lose focus when their |
| * selection state changes) but also optimizes change animations for selection. |
| */ |
| @Override |
| public void onBindViewHolder(DocumentHolder holder, int position, List<Object> payload) { |
| if (holder.getItemViewType() == ITEM_TYPE_LAYOUT_DIVIDER) { |
| // Whitespace items are hidden elements with no data to bind. |
| return; |
| } |
| |
| final View itemView = holder.itemView; |
| |
| if (payload.contains(MultiSelectManager.SELECTION_CHANGED_MARKER)) { |
| final boolean selected = isSelected(mModelIds.get(position)); |
| itemView.setActivated(selected); |
| return; |
| } else { |
| onBindViewHolder(holder, position); |
| } |
| } |
| |
| @Override |
| public void onBindViewHolder(DocumentHolder holder, int position) { |
| if (holder.getItemViewType() == ITEM_TYPE_LAYOUT_DIVIDER) { |
| // Whitespace items are hidden elements with no data to bind. |
| return; |
| } |
| |
| String modelId = mModelIds.get(position); |
| Cursor cursor = mModel.getItem(modelId); |
| holder.bind(cursor, modelId, getDisplayState()); |
| |
| final String docMimeType = getCursorString(cursor, Document.COLUMN_MIME_TYPE); |
| final int docFlags = getCursorInt(cursor, Document.COLUMN_FLAGS); |
| |
| holder.setSelected(isSelected(modelId)); |
| holder.setEnabled(mTuner.isDocumentEnabled(docMimeType, docFlags)); |
| if (DEBUG_ENABLE_DND) { |
| setupDragAndDropOnDocumentView(holder.itemView, cursor); |
| } |
| } |
| |
| @Override |
| public int getItemCount() { |
| return mModelIds.size(); |
| } |
| |
| @Override |
| public void onModelUpdate(Model model) { |
| mModelIds = Lists.newArrayList(model.getModelIds()); |
| // Start the divider at the end. That way if the code below encounters no documents |
| // (i.e. in a directory containing only directories), the divider is placed at the end |
| // of the list, as expected. |
| mDividerPosition = mModelIds.size(); |
| |
| // Walk down the list of IDs till we encounter something that's not a directory, and |
| // insert a whitespace element - this introduces a visual break in the grid between |
| // folders and documents. |
| // TODO: This code makes assumptions about the model, namely, that it performs a |
| // bucketed sort where directories will always be ordered before other files. CBB. |
| for (int i = 0; i < mModelIds.size(); ++i) { |
| final String mimeType = getCursorString( |
| model.getItem(mModelIds.get(i)), Document.COLUMN_MIME_TYPE); |
| if (!Document.MIME_TYPE_DIR.equals(mimeType)) { |
| mDividerPosition = i; |
| break; |
| } |
| } |
| |
| mModelIds.add(mDividerPosition, null); |
| } |
| |
| @Override |
| public void onModelUpdateFailed(Exception e) { |
| if (DEBUG) Log.d(TAG, "onModelUpdateFailed called "); |
| mModelIds.clear(); |
| } |
| |
| /** |
| * @return The model ID of the item at the given adapter position. |
| */ |
| public String getModelId(int adapterPosition) { |
| return mModelIds.get(adapterPosition); |
| } |
| |
| /** |
| * Hides a set of items from the associated RecyclerView. |
| * |
| * @param ids The Model IDs of the items to hide. |
| * @return A SparseArray that maps the hidden IDs to their old positions. This can be used |
| * to {@link #unhide} the items if necessary. |
| */ |
| public SparseArray<String> hide(String... ids) { |
| Set<String> toHide = Sets.newHashSet(ids); |
| |
| // Proceed backwards through the list of items, because each removal causes the |
| // positions of all subsequent items to change. |
| SparseArray<String> hiddenItems = new SparseArray<>(); |
| for (int i = mModelIds.size() - 1; i >= 0; --i) { |
| String id = mModelIds.get(i); |
| if (toHide.contains(id)) { |
| hiddenItems.put(i, mModelIds.remove(i)); |
| notifyItemRemoved(i); |
| } |
| } |
| |
| return hiddenItems; |
| } |
| |
| /** |
| * Unhides a set of previously hidden items. |
| * |
| * @param ids A sparse array of IDs from a previous call to {@link #hide}. |
| */ |
| public void unhide(SparseArray<String> ids) { |
| // Proceed backwards through the list of items, because each addition causes the |
| // positions of all subsequent items to change. |
| for (int i = ids.size() - 1; i >= 0; --i) { |
| int pos = ids.keyAt(i); |
| String id = ids.get(pos); |
| mModelIds.add(pos, id); |
| notifyItemInserted(pos); |
| } |
| } |
| |
| /** |
| * Returns a list of model IDs of items currently in the adapter. Excludes items that are |
| * currently hidden (see {@link #hide(String...)}). |
| * |
| * @return A list of Model IDs. |
| */ |
| public List<String> getModelIds() { |
| return mModelIds; |
| } |
| |
| @Override |
| public int getItemViewType(int position) { |
| if (position < mDividerPosition) { |
| return ITEM_TYPE_DIRECTORY; |
| } else if (position == mDividerPosition) { |
| return ITEM_TYPE_LAYOUT_DIVIDER; |
| } else { |
| return ITEM_TYPE_DOCUMENT; |
| } |
| } |
| |
| /** |
| * Triggers item-change notifications by stable ID. Passing an unrecognized ID will result |
| * in a warning in logcat, but no other error. |
| * |
| * @param id |
| * @param selectionChangedMarker |
| */ |
| public void notifyItemChanged(String id, String selectionChangedMarker) { |
| int position = mModelIds.indexOf(id); |
| |
| if (position >= 0) { |
| notifyItemChanged(position, selectionChangedMarker); |
| } else { |
| Log.w(TAG, "Item change notification received for unknown item: " + id); |
| } |
| } |
| } |
| |
| private String findCommonMimeType(List<String> mimeTypes) { |
| String[] commonType = mimeTypes.get(0).split("/"); |
| if (commonType.length != 2) { |
| return "*/*"; |
| } |
| |
| for (int i = 1; i < mimeTypes.size(); i++) { |
| String[] type = mimeTypes.get(i).split("/"); |
| if (type.length != 2) continue; |
| |
| if (!commonType[1].equals(type[1])) { |
| commonType[1] = "*"; |
| } |
| |
| if (!commonType[0].equals(type[0])) { |
| commonType[0] = "*"; |
| commonType[1] = "*"; |
| break; |
| } |
| } |
| |
| return commonType[0] + "/" + commonType[1]; |
| } |
| |
| private void copyFromClipboard() { |
| new AsyncTask<Void, Void, List<DocumentInfo>>() { |
| |
| @Override |
| protected List<DocumentInfo> doInBackground(Void... params) { |
| return mClipper.getClippedDocuments(); |
| } |
| |
| @Override |
| protected void onPostExecute(List<DocumentInfo> docs) { |
| DocumentInfo destination = |
| ((BaseActivity) getActivity()).getCurrentDirectory(); |
| copyDocuments(docs, destination); |
| } |
| }.execute(); |
| } |
| |
| private void copyFromClipData(final ClipData clipData, final DocumentInfo destination) { |
| checkNotNull(clipData); |
| new AsyncTask<Void, Void, List<DocumentInfo>>() { |
| |
| @Override |
| protected List<DocumentInfo> doInBackground(Void... params) { |
| return mClipper.getDocumentsFromClipData(clipData); |
| } |
| |
| @Override |
| protected void onPostExecute(List<DocumentInfo> docs) { |
| copyDocuments(docs, destination); |
| } |
| }.execute(); |
| } |
| |
| private void copyDocuments(final List<DocumentInfo> docs, final DocumentInfo destination) { |
| if (!canCopy(docs, destination)) { |
| Snackbars.makeSnackbar( |
| getActivity(), |
| R.string.clipboard_files_cannot_paste, |
| Snackbar.LENGTH_SHORT) |
| .show(); |
| return; |
| } |
| |
| if (docs.isEmpty()) { |
| return; |
| } |
| |
| final DocumentStack curStack = getDisplayState().stack; |
| DocumentStack tmpStack = new DocumentStack(); |
| if (destination != null) { |
| tmpStack.push(destination); |
| tmpStack.addAll(curStack); |
| } else { |
| tmpStack = curStack; |
| } |
| |
| CopyService.start(getActivity(), docs, tmpStack, CopyService.TRANSFER_MODE_COPY); |
| } |
| |
| private ClipData getClipDataFromDocuments(List<DocumentInfo> docs) { |
| Context context = getActivity(); |
| final ContentResolver resolver = context.getContentResolver(); |
| ClipData clipData = null; |
| for (DocumentInfo doc : docs) { |
| final Uri uri = DocumentsContract.buildDocumentUri(doc.authority, doc.documentId); |
| if (clipData == null) { |
| // TODO: figure out what this string should be. |
| // Currently it is not displayed anywhere in the UI, but this might change. |
| final String label = ""; |
| clipData = ClipData.newUri(resolver, label, uri); |
| } else { |
| // TODO: update list of mime types in ClipData. |
| clipData.addItem(new ClipData.Item(uri)); |
| } |
| } |
| return clipData; |
| } |
| |
| public void copySelectedToClipboard() { |
| Selection selection = mSelectionManager.getSelection(new Selection()); |
| if (!selection.isEmpty()) { |
| copySelectionToClipboard(selection); |
| } |
| } |
| |
| void copySelectionToClipboard(Selection selection) { |
| checkArgument(!selection.isEmpty()); |
| new GetDocumentsTask() { |
| @Override |
| void onDocumentsReady(List<DocumentInfo> docs) { |
| mClipper.clipDocuments(docs); |
| Activity activity = getActivity(); |
| Snackbars.makeSnackbar(activity, |
| activity.getResources().getQuantityString( |
| R.plurals.clipboard_files_clipped, docs.size(), docs.size()), |
| Snackbar.LENGTH_SHORT).show(); |
| } |
| }.execute(selection); |
| } |
| |
| public void pasteFromClipboard() { |
| copyFromClipboard(); |
| getActivity().invalidateOptionsMenu(); |
| } |
| |
| /** |
| * Returns true if the list of files can be copied to destination. Note that this |
| * is a policy check only. Currently the method does not attempt to verify |
| * available space or any other environmental aspects possibly resulting in |
| * failure to copy. |
| * |
| * @return true if the list of files can be copied to destination. |
| */ |
| boolean canCopy(List<DocumentInfo> files, DocumentInfo dest) { |
| BaseActivity activity = (BaseActivity) getActivity(); |
| |
| final RootInfo root = activity.getCurrentRoot(); |
| |
| // Can't copy folders to Downloads. |
| if (root.isDownloads()) { |
| for (DocumentInfo docs : files) { |
| if (docs.isDirectory()) { |
| return false; |
| } |
| } |
| } |
| |
| return dest != null && dest.isDirectory() && dest.isCreateSupported(); |
| } |
| |
| public void selectAllFiles() { |
| // Only select things currently visible in the adapter. |
| boolean changed = mSelectionManager.setItemsSelected(mAdapter.getModelIds(), true); |
| if (changed) { |
| updateDisplayState(); |
| } |
| } |
| |
| private void setupDragAndDropOnDirectoryView(View view) { |
| // Listen for drops on non-directory items and empty space. |
| view.setOnDragListener(mOnDragListener); |
| } |
| |
| private void setupDragAndDropOnDocumentView(View view, Cursor cursor) { |
| final String docMimeType = getCursorString(cursor, Document.COLUMN_MIME_TYPE); |
| if (Document.MIME_TYPE_DIR.equals(docMimeType)) { |
| // Make a directory item a drop target. Drop on non-directories and empty space |
| // is handled at the list/grid view level. |
| view.setOnDragListener(mOnDragListener); |
| } |
| |
| // Temporary: attaching the listener to the title only. |
| // Attaching to the entire item conflicts with the item long click handler responsible |
| // for item selection. |
| final View title = view.findViewById(android.R.id.title); |
| title.setOnLongClickListener(mLongClickListener); |
| } |
| |
| private View.OnDragListener mOnDragListener = new View.OnDragListener() { |
| @Override |
| public boolean onDrag(View v, DragEvent event) { |
| switch (event.getAction()) { |
| case DragEvent.ACTION_DRAG_STARTED: |
| // TODO: Check if the event contains droppable data. |
| return true; |
| |
| // TODO: Highlight potential drop target directory? |
| // TODO: Expand drop target directory on hover? |
| case DragEvent.ACTION_DRAG_ENTERED: |
| case DragEvent.ACTION_DRAG_LOCATION: |
| case DragEvent.ACTION_DRAG_EXITED: |
| case DragEvent.ACTION_DRAG_ENDED: |
| return true; |
| |
| case DragEvent.ACTION_DROP: |
| String dstId = getModelId(v); |
| DocumentInfo dstDir = null; |
| if (dstId != null) { |
| Cursor dstCursor = mModel.getItem(dstId); |
| checkNotNull(dstCursor, "Cursor cannot be null."); |
| dstDir = DocumentInfo.fromDirectoryCursor(dstCursor); |
| // TODO: Do not drop into the directory where the documents came from. |
| } |
| copyFromClipData(event.getClipData(), dstDir); |
| return true; |
| } |
| return false; |
| } |
| }; |
| |
| /** |
| * Gets the model ID for a given motion event (using the event position) |
| */ |
| private String getModelId(MotionEvent e) { |
| View view = mRecView.findChildViewUnder(e.getX(), e.getY()); |
| if (view == null) { |
| return null; |
| } |
| RecyclerView.ViewHolder vh = mRecView.getChildViewHolder(view); |
| if (vh instanceof DocumentHolder) { |
| return ((DocumentHolder) vh).modelId; |
| } else { |
| return null; |
| } |
| } |
| |
| /** |
| * Gets the model ID for a given RecyclerView item. |
| * @param view A View that is a document item view, or a child of a document item view. |
| * @return The Model ID for the given document, or null if the given view is not associated with |
| * a document item view. |
| */ |
| private String getModelId(View view) { |
| while (true) { |
| if (view.getLayoutParams() instanceof RecyclerView.LayoutParams) { |
| RecyclerView.ViewHolder vh = mRecView.getChildViewHolder(view); |
| if (vh instanceof DocumentHolder) { |
| return ((DocumentHolder) vh).modelId; |
| } else { |
| return null; |
| } |
| } |
| ViewParent parent = view.getParent(); |
| if (parent == null || !(parent instanceof View)) { |
| return null; |
| } |
| view = (View) parent; |
| } |
| } |
| |
| private View.OnLongClickListener mLongClickListener = new View.OnLongClickListener() { |
| @Override |
| public boolean onLongClick(View v) { |
| final List<DocumentInfo> docs = getDraggableDocuments(v); |
| if (docs.isEmpty()) { |
| return false; |
| } |
| v.startDrag( |
| getClipDataFromDocuments(docs), |
| new DrawableShadowBuilder(getDragShadowIcon(docs)), |
| null, |
| View.DRAG_FLAG_GLOBAL | View.DRAG_FLAG_GLOBAL_URI_READ | |
| View.DRAG_FLAG_GLOBAL_URI_WRITE |
| ); |
| return true; |
| } |
| }; |
| |
| private List<DocumentInfo> getDraggableDocuments(View currentItemView) { |
| String modelId = getModelId(currentItemView); |
| if (modelId == null) { |
| return Collections.EMPTY_LIST; |
| } |
| |
| final List<DocumentInfo> selectedDocs = |
| mModel.getDocuments(mSelectionManager.getSelection()); |
| if (!selectedDocs.isEmpty()) { |
| if (!isSelected(modelId)) { |
| // There is a selection that does not include the current item, drag nothing. |
| return Collections.EMPTY_LIST; |
| } |
| return selectedDocs; |
| } |
| |
| final Cursor cursor = mModel.getItem(modelId); |
| checkNotNull(cursor, "Cursor cannot be null."); |
| final DocumentInfo doc = DocumentInfo.fromDirectoryCursor(cursor); |
| |
| return Lists.newArrayList(doc); |
| } |
| |
| private Drawable getDragShadowIcon(List<DocumentInfo> docs) { |
| if (docs.size() == 1) { |
| final DocumentInfo doc = docs.get(0); |
| return mIconHelper.getDocumentIcon(getActivity(), doc.authority, doc.documentId, |
| doc.mimeType, doc.icon); |
| } |
| return getActivity().getDrawable(R.drawable.ic_doc_generic); |
| } |
| |
| private class DrawableShadowBuilder extends View.DragShadowBuilder { |
| |
| private final Drawable mShadow; |
| |
| private final int mShadowDimension; |
| |
| public DrawableShadowBuilder(Drawable shadow) { |
| mShadow = shadow; |
| mShadowDimension = getResources().getDimensionPixelSize( |
| R.dimen.drag_shadow_size); |
| mShadow.setBounds(0, 0, mShadowDimension, mShadowDimension); |
| } |
| |
| @Override |
| public void onProvideShadowMetrics( |
| Point shadowSize, Point shadowTouchPoint) { |
| shadowSize.set(mShadowDimension, mShadowDimension); |
| shadowTouchPoint.set(mShadowDimension / 2, mShadowDimension / 2); |
| } |
| |
| @Override |
| public void onDrawShadow(Canvas canvas) { |
| mShadow.draw(canvas); |
| } |
| } |
| |
| /** |
| * Abstract task providing support for loading documents *off* |
| * the main thread. And if it isn't obvious, creating a list |
| * of documents (especially large lists) can be pretty expensive. |
| */ |
| private abstract class GetDocumentsTask |
| extends AsyncTask<Selection, Void, List<DocumentInfo>> { |
| @Override |
| protected final List<DocumentInfo> doInBackground(Selection... selected) { |
| return mModel.getDocuments(selected[0]); |
| } |
| |
| @Override |
| protected final void onPostExecute(List<DocumentInfo> docs) { |
| onDocumentsReady(docs); |
| } |
| |
| abstract void onDocumentsReady(List<DocumentInfo> docs); |
| } |
| |
| boolean isSelected(String modelId) { |
| return mSelectionManager.getSelection().contains(modelId); |
| } |
| |
| private class ItemClickListener implements DocumentHolder.ClickListener { |
| @Override |
| public void onClick(DocumentHolder doc) { |
| if (mSelectionManager.hasSelection()) { |
| mSelectionManager.toggleSelection(doc.modelId); |
| mSelectionManager.setSelectionRangeBegin(doc.getAdapterPosition()); |
| } else { |
| handleViewItem(doc.modelId); |
| } |
| } |
| } |
| |
| private class ModelUpdateListener implements Model.UpdateListener { |
| @Override |
| public void onModelUpdate(Model model) { |
| if (model.info != null || model.error != null) { |
| mMessageBar.setInfo(model.info); |
| mMessageBar.setError(model.error); |
| mMessageBar.show(); |
| } |
| |
| mProgressBar.setVisibility(model.isLoading() ? View.VISIBLE : View.GONE); |
| |
| if (model.isEmpty()) { |
| showEmptyView(); |
| } else { |
| showRecyclerView(); |
| mAdapter.notifyDataSetChanged(); |
| } |
| } |
| |
| @Override |
| public void onModelUpdateFailed(Exception e) { |
| showErrorView(); |
| } |
| } |
| } |