/*
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* Copyright (C) 2014 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.taoke.autopay.android.utils.accessibility;
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import android.content.Context;
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import androidx.core.view.accessibility.AccessibilityNodeInfoCompat;
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import java.util.LinkedList;
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/**
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* Filters {@link AccessibilityNodeInfoCompat}s.
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*/
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public abstract class NodeFilter {
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/**
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* Returns whether the specified node matches the filter.
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*
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* @param context The parent context.
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* @param node The node info to filter.
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* @return {@code true} if the node is accepted.
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*/
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public abstract boolean accept(Context context, AccessibilityNodeInfoCompat node);
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/**
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* Returns the logical AND of this and the specified filter.
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*
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* @param filter The filter to AND this filter with.
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* @return A filter where calling <code>accept()</code> returns the result of
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* <code>(this.accept() && filter.accept())</code>.
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*/
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public NodeFilter and(NodeFilter filter) {
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if (filter == null) {
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return this;
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}
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return new NodeFilterAnd(this, filter);
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}
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/**
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* Returns the logical OR of this and the specified filter.
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*
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* @param filter The filter to OR this filter with.
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* @return A filter where calling <code>accept()</code> returns the result of
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* <code>(this.accept() || filter.accept())</code>.
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*/
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public NodeFilter or(NodeFilter filter) {
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if (filter == null) {
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return this;
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}
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return new NodeFilterOr(this, filter);
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}
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private static class NodeFilterAnd extends NodeFilter {
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private final LinkedList<NodeFilter> mFilters = new LinkedList<NodeFilter>();
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NodeFilterAnd(NodeFilter lhs, NodeFilter rhs) {
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mFilters.add(lhs);
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mFilters.add(rhs);
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}
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@Override
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public boolean accept(Context context, AccessibilityNodeInfoCompat node) {
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for (NodeFilter filter : mFilters) {
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if (!filter.accept(context, node)) {
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return false;
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}
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}
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return true;
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}
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@Override
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public NodeFilter and(NodeFilter filter) {
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mFilters.add(filter);
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return this;
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}
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}
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private static class NodeFilterOr extends NodeFilter {
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private final LinkedList<NodeFilter> mFilters = new LinkedList<NodeFilter>();
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NodeFilterOr(NodeFilter lhs, NodeFilter rhs) {
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mFilters.add(lhs);
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mFilters.add(rhs);
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}
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@Override
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public boolean accept(Context context, AccessibilityNodeInfoCompat node) {
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for (NodeFilter filter : mFilters) {
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if (filter.accept(context, node)) {
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return true;
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}
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}
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return false;
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}
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@Override
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public NodeFilter or(NodeFilter filter) {
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mFilters.add(filter);
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return this;
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}
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}
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}
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