/*
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* Copyright (C) 2006 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 android.text.method;
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import android.text.InputType;
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import android.text.Spannable;
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import android.view.KeyCharacterMap.KeyData;
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import android.view.KeyEvent;
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/**
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* For dialing-only text entry
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* <p></p>
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* As for all implementations of {@link KeyListener}, this class is only concerned
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* with hardware keyboards. Software input methods have no obligation to trigger
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* the methods in this class.
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*/
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public class DialerKeyListener extends NumberKeyListener
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{
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@Override
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protected char[] getAcceptedChars()
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{
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return CHARACTERS;
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}
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public static DialerKeyListener getInstance() {
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if (sInstance != null)
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return sInstance;
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sInstance = new DialerKeyListener();
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return sInstance;
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}
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public int getInputType() {
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return InputType.TYPE_CLASS_PHONE;
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}
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/**
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* Overrides the superclass's lookup method to prefer the number field
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* from the KeyEvent.
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*/
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protected int lookup(KeyEvent event, Spannable content) {
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int meta = getMetaState(content, event);
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int number = event.getNumber();
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/*
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* Prefer number if no meta key is active, or if it produces something
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* valid and the meta lookup does not.
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*/
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if ((meta & (MetaKeyKeyListener.META_ALT_ON | MetaKeyKeyListener.META_SHIFT_ON)) == 0) {
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if (number != 0) {
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return number;
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}
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}
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int match = super.lookup(event, content);
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if (match != 0) {
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return match;
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} else {
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/*
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* If a meta key is active but the lookup with the meta key
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* did not produce anything, try some other meta keys, because
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* the user might have pressed SHIFT when they meant ALT,
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* or vice versa.
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*/
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if (meta != 0) {
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KeyData kd = new KeyData();
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char[] accepted = getAcceptedChars();
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if (event.getKeyData(kd)) {
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for (int i = 1; i < kd.meta.length; i++) {
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if (ok(accepted, kd.meta[i])) {
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return kd.meta[i];
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}
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}
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}
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}
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/*
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* Otherwise, use the number associated with the key, since
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* whatever they wanted to do with the meta key does not
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* seem to be valid here.
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*/
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return number;
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}
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}
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/**
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* The characters that are used.
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*
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* @see KeyEvent#getMatch
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* @see #getAcceptedChars
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*/
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public static final char[] CHARACTERS = new char[] {
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'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '#', '*',
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'+', '-', '(', ')', ',', '/', 'N', '.', ' ', ';'
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};
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private static DialerKeyListener sInstance;
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}
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