/*
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* Copyright (C) 2017 The Android Open Source Project
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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.android.settings.widget;
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import android.content.Context;
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import android.text.Editable;
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import android.text.InputType;
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import android.text.TextUtils;
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import android.text.TextWatcher;
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import android.util.AttributeSet;
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import android.view.View;
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import android.widget.EditText;
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import android.widget.TextView;
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import androidx.annotation.VisibleForTesting;
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import androidx.appcompat.app.AlertDialog;
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import androidx.preference.PreferenceViewHolder;
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import com.android.settingslib.CustomEditTextPreferenceCompat;
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/**
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* {@code EditTextPreference} that supports input validation.
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*/
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public class ValidatedEditTextPreference extends CustomEditTextPreferenceCompat {
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public interface Validator {
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boolean isTextValid(String value);
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}
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private final EditTextWatcher mTextWatcher = new EditTextWatcher();
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private Validator mValidator;
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private boolean mIsPassword;
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private boolean mIsSummaryPassword;
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public ValidatedEditTextPreference(Context context, AttributeSet attrs,
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int defStyleAttr, int defStyleRes) {
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super(context, attrs, defStyleAttr, defStyleRes);
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}
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public ValidatedEditTextPreference(Context context, AttributeSet attrs, int defStyleAttr) {
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super(context, attrs, defStyleAttr);
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}
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public ValidatedEditTextPreference(Context context, AttributeSet attrs) {
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super(context, attrs);
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}
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public ValidatedEditTextPreference(Context context) {
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super(context);
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}
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@Override
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protected void onBindDialogView(View view) {
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super.onBindDialogView(view);
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final EditText editText = view.findViewById(android.R.id.edit);
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if (editText != null && !TextUtils.isEmpty(editText.getText())) {
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editText.setSelection(editText.getText().length());
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}
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if (mValidator != null && editText != null) {
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editText.removeTextChangedListener(mTextWatcher);
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if (mIsPassword) {
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editText.setInputType(
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InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_VISIBLE_PASSWORD);
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editText.setMaxLines(1);
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}
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editText.addTextChangedListener(mTextWatcher);
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}
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}
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@Override
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public void onBindViewHolder(PreferenceViewHolder holder) {
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super.onBindViewHolder(holder);
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final TextView textView = (TextView) holder.findViewById(android.R.id.summary);
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if (textView == null) {
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return;
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}
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if (mIsSummaryPassword) {
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textView.setInputType(
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InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_VARIATION_PASSWORD);
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} else {
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textView.setInputType(
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InputType.TYPE_CLASS_TEXT | InputType.TYPE_TEXT_FLAG_NO_SUGGESTIONS);
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}
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}
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public void setIsPassword(boolean isPassword) {
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mIsPassword = isPassword;
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}
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public void setIsSummaryPassword(boolean isPassword) {
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mIsSummaryPassword = isPassword;
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}
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@VisibleForTesting(otherwise = VisibleForTesting.NONE)
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public boolean isPassword() {
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return mIsPassword;
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}
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public void setValidator(Validator validator) {
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mValidator = validator;
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}
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private class EditTextWatcher implements TextWatcher {
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@Override
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public void onTextChanged(CharSequence s, int start, int before, int count) {
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}
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@Override
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public void beforeTextChanged(CharSequence s, int start, int before, int count) {
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}
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@Override
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public void afterTextChanged(Editable s) {
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final EditText editText = getEditText();
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if (mValidator != null && editText != null) {
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final AlertDialog dialog = (AlertDialog) getDialog();
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final boolean valid = mValidator.isTextValid(editText.getText().toString());
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dialog.getButton(AlertDialog.BUTTON_POSITIVE).setEnabled(valid);
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}
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}
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}
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}
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