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// Copyright 2014 Neil Wilkinson ////from w ww . j a va2 s . c om // 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.measuredsoftware.passvault.listener; import android.text.Editable; import android.text.TextWatcher; import com.measuredsoftware.passvault.tools.StringTools; /** * Intermediatary for watching the state of the password edit text. */ public class PasswordTextWatcher implements TextWatcher { private final Listener listener; private int textWasLength; private String textWas; public PasswordTextWatcher(final Listener listener) { this.listener = listener; } @Override public void beforeTextChanged(final CharSequence s, final int start, final int count, final int after) { textWas = s.toString(); textWasLength = s.length(); } @Override public void onTextChanged(final CharSequence s, final int start, final int before, final int count) { // ignore } @Override public void afterTextChanged(final Editable s) { final int characterChangedCount = s.length() - textWasLength; if (s.length() == 0) { listener.onTextCleared(); } else if (Math.abs(characterChangedCount) == 1 && StringTools.textOneCharDifferent(textWas, s.toString())) { listener.onTextKeyboardEdited(); } else { listener.onTextAutoEdited(); } } public interface Listener { void onTextCleared(); void onTextKeyboardEdited(); void onTextAutoEdited(); } }