| /* |
| * Copyright (C) 2017 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 androidx.core.util.Preconditions.checkArgument; |
| |
| import android.view.KeyEvent; |
| |
| import androidx.recyclerview.selection.SelectionTracker; |
| import androidx.recyclerview.selection.SelectionTracker.SelectionPredicate; |
| import androidx.recyclerview.widget.RecyclerView; |
| import androidx.recyclerview.widget.RecyclerView.ViewHolder; |
| |
| import com.android.documentsui.ActionHandler; |
| |
| /** |
| * Helper class dedicated to building gesture input handlers. The construction |
| * of the various input handlers is non trivial. To keep logic clear, |
| * code flexible, and DirectoryFragment small(er), the construction has been |
| * isolated here in a separate class. |
| */ |
| final class InputHandlers { |
| |
| private ActionHandler mActions; |
| private SelectionTracker<String> mSelectionHelper; |
| private SelectionPredicate<String> mSelectionPredicate; |
| private FocusHandler mFocusHandler; |
| private RecyclerView mRecView; |
| |
| InputHandlers( |
| ActionHandler actions, |
| SelectionTracker<String> selectionHelper, |
| SelectionPredicate<String> selectionPredicate, |
| FocusHandler focusHandler, |
| RecyclerView recView) { |
| |
| checkArgument(actions != null); |
| checkArgument(selectionHelper != null); |
| checkArgument(selectionPredicate != null); |
| checkArgument(focusHandler != null); |
| checkArgument(recView != null); |
| |
| mActions = actions; |
| mSelectionHelper = selectionHelper; |
| mSelectionPredicate = selectionPredicate; |
| mFocusHandler = focusHandler; |
| mRecView = recView; |
| } |
| |
| KeyInputHandler createKeyHandler() { |
| KeyInputHandler.Callbacks<DocumentItemDetails> callbacks = |
| new KeyInputHandler.Callbacks<DocumentItemDetails>() { |
| @Override |
| public boolean isInteractiveItem(DocumentItemDetails item, KeyEvent e) { |
| switch (item.getItemViewType()) { |
| case DocumentsAdapter.ITEM_TYPE_HEADER_MESSAGE: |
| case DocumentsAdapter.ITEM_TYPE_INFLATED_MESSAGE: |
| case DocumentsAdapter.ITEM_TYPE_SECTION_BREAK: |
| return false; |
| case DocumentsAdapter.ITEM_TYPE_DOCUMENT: |
| case DocumentsAdapter.ITEM_TYPE_DIRECTORY: |
| return true; |
| default: |
| throw new RuntimeException( |
| "Unsupported item type: " + item.getItemViewType()); |
| } |
| } |
| |
| @Override |
| public boolean onItemActivated(DocumentItemDetails item, KeyEvent e) { |
| // Handle enter key events |
| switch (e.getKeyCode()) { |
| case KeyEvent.KEYCODE_ENTER: |
| case KeyEvent.KEYCODE_DPAD_CENTER: |
| case KeyEvent.KEYCODE_BUTTON_A: |
| return mActions.openItem( |
| item, |
| ActionHandler.VIEW_TYPE_REGULAR, |
| ActionHandler.VIEW_TYPE_PREVIEW); |
| case KeyEvent.KEYCODE_SPACE: |
| return mActions.openItem( |
| item, |
| ActionHandler.VIEW_TYPE_PREVIEW, |
| ActionHandler.VIEW_TYPE_NONE); |
| } |
| |
| return false; |
| } |
| |
| @Override |
| public boolean onFocusItem(DocumentItemDetails details, int keyCode, KeyEvent event) { |
| ViewHolder holder = |
| mRecView.findViewHolderForAdapterPosition(details.getPosition()); |
| if (holder instanceof DocumentHolder) { |
| return mFocusHandler.handleKey((DocumentHolder) holder, keyCode, event); |
| } |
| return false; |
| } |
| }; |
| |
| return new KeyInputHandler(mSelectionHelper, mSelectionPredicate, callbacks); |
| } |
| } |