19066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/* 29066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Copyright (C) 2006 The Android Open Source Project 39066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 49066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Licensed under the Apache License, Version 2.0 (the "License"); 59066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * you may not use this file except in compliance with the License. 69066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You may obtain a copy of the License at 79066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 89066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * http://www.apache.org/licenses/LICENSE-2.0 99066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * 109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Unless required by applicable law or agreed to in writing, software 119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * distributed under the License is distributed on an "AS IS" BASIS, 129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * See the License for the specific language governing permissions and 149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * limitations under the License. 159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpackage android.text.method; 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.KeyEvent; 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.View; 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.text.Editable; 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.text.InputFilter; 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.text.Selection; 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.text.Spannable; 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.text.SpannableStringBuilder; 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.text.Spanned; 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * For numeric text entry 30405bc51c5dc73846a4abdc325cd234eb2d37469fJean Chalard * <p></p> 31405bc51c5dc73846a4abdc325cd234eb2d37469fJean Chalard * As for all implementations of {@link KeyListener}, this class is only concerned 32405bc51c5dc73846a4abdc325cd234eb2d37469fJean Chalard * with hardware keyboards. Software input methods have no obligation to trigger 33405bc51c5dc73846a4abdc325cd234eb2d37469fJean Chalard * the methods in this class. 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic abstract class NumberKeyListener extends BaseKeyListener 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project implements InputFilter 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project{ 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * You can say which characters you can accept. 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected abstract char[] getAcceptedChars(); 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected int lookup(KeyEvent event, Spannable content) { 4414f10e5d5f51bc54ca2a45ee62d3cfb6debd3af0Raph Levien return event.getMatch(getAcceptedChars(), getMetaState(content, event)); 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public CharSequence filter(CharSequence source, int start, int end, 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Spanned dest, int dstart, int dend) { 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project char[] accept = getAcceptedChars(); 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean filter = false; 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int i; 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (i = start; i < end; i++) { 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!ok(accept, source.charAt(i))) { 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (i == end) { 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // It was all OK. 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return null; 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (end - start == 1) { 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // It was not OK, and there is only one char, so nothing remains. 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return ""; 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project SpannableStringBuilder filtered = 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project new SpannableStringBuilder(source, start, end); 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project i -= start; 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project end -= start; 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int len = end - start; 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Only count down to i because the chars before that were all OK. 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int j = end - 1; j >= i; j--) { 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!ok(accept, source.charAt(j))) { 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project filtered.delete(j, j + 1); 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return filtered; 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected static boolean ok(char[] accept, char c) { 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = accept.length - 1; i >= 0; i--) { 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (accept[i] == c) { 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return false; 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project @Override 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public boolean onKeyDown(View view, Editable content, 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int keyCode, KeyEvent event) { 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int selStart, selEnd; 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project { 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int a = Selection.getSelectionStart(content); 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int b = Selection.getSelectionEnd(content); 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selStart = Math.min(a, b); 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selEnd = Math.max(a, b); 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (selStart < 0 || selEnd < 0) { 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project selStart = selEnd = 0; 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Selection.setSelection(content, 0); 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int i = event != null ? lookup(event, content) : 0; 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int repeatCount = event != null ? event.getRepeatCount() : 0; 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (repeatCount == 0) { 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (i != 0) { 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (selStart != selEnd) { 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Selection.setSelection(content, selEnd); 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project content.replace(selStart, selEnd, String.valueOf((char) i)); 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjustMetaAfterKeypress(content); 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else if (i == '0' && repeatCount == 1) { 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // Pretty hackish, it replaces the 0 with the + 1289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (selStart == selEnd && selEnd > 0 && 1309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project content.charAt(selStart - 1) == '0') { 1319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project content.replace(selStart - 1, selEnd, String.valueOf('+')); 1329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjustMetaAfterKeypress(content); 1339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return true; 1349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project adjustMetaAfterKeypress(content); 1389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return super.onKeyDown(view, content, keyCode, event); 1399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 141