| /* |
| * Copyright (C) 2016 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.picker; |
| |
| import static com.android.documentsui.base.State.ACTION_CREATE; |
| import static com.android.documentsui.base.State.ACTION_GET_CONTENT; |
| import static com.android.documentsui.base.State.ACTION_OPEN; |
| import static com.android.documentsui.base.State.ACTION_OPEN_TREE; |
| import static com.android.documentsui.base.State.ACTION_PICK_COPY_DESTINATION; |
| |
| import android.provider.DocumentsContract.Document; |
| |
| import com.android.documentsui.base.EventListener; |
| import com.android.documentsui.base.MimePredicate; |
| import com.android.documentsui.base.State; |
| import com.android.documentsui.dirlist.FragmentTuner; |
| import com.android.documentsui.dirlist.Model; |
| import com.android.documentsui.dirlist.Model.Update; |
| |
| import javax.annotation.Nullable; |
| |
| /** |
| * Provides support for Platform specific specializations of DirectoryFragment. |
| */ |
| final class Tuner extends FragmentTuner { |
| |
| private static final String TAG = "PickTuner"; |
| |
| |
| private final PickActivity mActivity; |
| private final State mState; |
| |
| private final Config mConfig = new Config(this::onModelLoaded); |
| |
| public Tuner(PickActivity activity, State state) { |
| |
| assert(activity != null); |
| assert(state != null); |
| |
| mActivity = activity; |
| mState = state; |
| } |
| |
| @Override |
| public boolean canSelectType(String docMimeType, int docFlags) { |
| if (!isDocumentEnabled(docMimeType, docFlags)) { |
| return false; |
| } |
| |
| if (MimePredicate.isDirectoryType(docMimeType)) { |
| return false; |
| } |
| |
| if (mState.action == ACTION_OPEN_TREE |
| || mState.action == ACTION_PICK_COPY_DESTINATION) { |
| // In this case nothing *ever* is selectable...the expected user behavior is |
| // they navigate *into* a folder, then click a confirmation button indicating |
| // that the current directory is the directory they are picking. |
| return false; |
| } |
| |
| return true; |
| } |
| |
| @Override |
| public boolean isDocumentEnabled(String mimeType, int docFlags) { |
| // Directories are always enabled. |
| if (MimePredicate.isDirectoryType(mimeType)) { |
| return true; |
| } |
| |
| switch (mState.action) { |
| case ACTION_CREATE: |
| // Read-only files are disabled when creating. |
| if ((docFlags & Document.FLAG_SUPPORTS_WRITE) == 0) { |
| return false; |
| } |
| case ACTION_OPEN: |
| case ACTION_GET_CONTENT: |
| final boolean isVirtual = (docFlags & Document.FLAG_VIRTUAL_DOCUMENT) != 0; |
| if (isVirtual && mState.openableOnly) { |
| return false; |
| } |
| } |
| |
| return MimePredicate.mimeMatches(mState.acceptMimes, mimeType); |
| } |
| |
| private void onModelLoaded(Model.Update update) { |
| mConfig.modelLoadObserved = true; |
| boolean showDrawer = false; |
| |
| if (MimePredicate.mimeMatches(MimePredicate.VISUAL_MIMES, mState.acceptMimes)) { |
| showDrawer = false; |
| } |
| if (mState.external && mState.action == ACTION_GET_CONTENT) { |
| showDrawer = true; |
| } |
| if (mState.action == ACTION_PICK_COPY_DESTINATION) { |
| showDrawer = true; |
| } |
| |
| // When launched into empty root, open drawer. |
| if (mConfig.model.isEmpty()) { |
| showDrawer = true; |
| } |
| |
| if (showDrawer && !mState.hasInitialLocationChanged() && !mConfig.searchMode |
| && !mConfig.modelLoadObserved) { |
| // This noops on layouts without drawer, so no need to guard. |
| mActivity.setRootsDrawerOpen(true); |
| } |
| } |
| |
| Tuner reset(Model model, boolean searchMode) { |
| mConfig.reset(model, searchMode); |
| return this; |
| } |
| |
| private static final class Config { |
| |
| @Nullable Model model; |
| boolean searchMode; |
| |
| private final EventListener<Update> mModelUpdateListener; |
| |
| public Config(EventListener<Update> modelUpdateListener) { |
| mModelUpdateListener = modelUpdateListener; |
| } |
| |
| // We use this to keep track of whether a model has been previously loaded or not so we can |
| // open the drawer on empty directories on first launch |
| private boolean modelLoadObserved; |
| |
| public void reset(Model model, boolean searchMode) { |
| assert(model != null); |
| |
| this.searchMode = searchMode; |
| this.model = model; |
| |
| model.addUpdateListener(mModelUpdateListener); |
| modelLoadObserved = false; |
| } |
| } |
| } |