| /* |
| * 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.example.android.autofill.service; |
| |
| import android.app.assist.AssistStructure; |
| import android.support.annotation.NonNull; |
| |
| import com.google.common.base.Preconditions; |
| import com.google.common.collect.ImmutableList; |
| |
| import java.util.List; |
| |
| import static android.app.assist.AssistStructure.ViewNode; |
| |
| /** |
| * Wrapper for {@link AssistStructure} to make it easy to parse. |
| */ |
| public final class ClientParser { |
| private final List<AssistStructure> mStructures; |
| |
| public ClientParser(@NonNull List<AssistStructure> structures) { |
| Preconditions.checkNotNull(structures); |
| mStructures = structures; |
| } |
| |
| public ClientParser(@NonNull AssistStructure structure) { |
| this(ImmutableList.of(structure)); |
| } |
| |
| /** |
| * Traverses through the {@link AssistStructure} and does something at each {@link ViewNode}. |
| * |
| * @param processor contains action to be performed on each {@link ViewNode}. |
| */ |
| public void parse(NodeProcessor processor) { |
| for (AssistStructure structure : mStructures) { |
| int nodes = structure.getWindowNodeCount(); |
| for (int i = 0; i < nodes; i++) { |
| AssistStructure.ViewNode viewNode = structure.getWindowNodeAt(i).getRootViewNode(); |
| traverseRoot(viewNode, processor); |
| } |
| } |
| } |
| |
| private void traverseRoot(AssistStructure.ViewNode viewNode, NodeProcessor processor) { |
| processor.processNode(viewNode); |
| int childrenSize = viewNode.getChildCount(); |
| if (childrenSize > 0) { |
| for (int i = 0; i < childrenSize; i++) { |
| traverseRoot(viewNode.getChildAt(i), processor); |
| } |
| } |
| } |
| |
| public interface NodeProcessor { |
| void processNode(ViewNode node); |
| } |
| } |