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/*
* 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.autofillframework.multidatasetservice
import android.app.assist.AssistStructure
import android.app.assist.AssistStructure.ViewNode
import android.util.Log
import com.example.android.autofillframework.CommonUtil.TAG
import com.example.android.autofillframework.multidatasetservice.model.FilledAutofillFieldCollection
import com.example.android.autofillframework.multidatasetservice.model.FilledAutofillField
/**
* Parser for an AssistStructure object. This is invoked when the Autofill Service receives an
* AssistStructure from the client Activity, representing its View hierarchy. In this sample, it
* parses the hierarchy and collects autofill metadata from {@link ViewNode}s along the way.
*/
internal class StructureParser(private val mStructure: AssistStructure) {
val autofillFields = AutofillFieldMetadataCollection()
var filledAutofillFieldCollection: FilledAutofillFieldCollection = FilledAutofillFieldCollection()
private set
fun parseForFill() {
parse(true)
}
fun parseForSave() {
parse(false)
}
/**
* Traverse AssistStructure and add ViewNode metadata to a flat list.
*/
private fun parse(forFill: Boolean) {
Log.d(TAG, "Parsing structure for " + mStructure.activityComponent)
val nodes = mStructure.windowNodeCount
filledAutofillFieldCollection = FilledAutofillFieldCollection()
for (i in 0..nodes - 1) {
val node = mStructure.getWindowNodeAt(i)
val view = node.rootViewNode
parseLocked(forFill, view)
}
}
private fun parseLocked(forFill: Boolean, viewNode: ViewNode) {
viewNode.autofillHints?.let { autofillHints ->
if (autofillHints.isNotEmpty()) {
if (forFill) {
autofillFields.add(AutofillFieldMetadata(viewNode))
} else {
filledAutofillFieldCollection.setAutofillValuesForHints(viewNode.autofillHints,
FilledAutofillField(viewNode))
}
}
}
val childrenSize = viewNode.childCount
if (childrenSize > 0) {
for (i in 0..childrenSize - 1) {
parseLocked(forFill, viewNode.getChildAt(i))
}
}
}
}
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