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.graphics.Rect; 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.text.Editable; 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.text.GetChars; 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.text.Spannable; 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.text.Spanned; 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.text.SpannedString; 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.text.TextUtils; 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimport android.view.View; 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * This transformation method causes the characters in the {@link #getOriginal} 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * array to be replaced by the corresponding characters in the 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * {@link #getReplacement} array. 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic abstract class ReplacementTransformationMethod 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimplements TransformationMethod 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project{ 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns the list of characters that are to be replaced by other 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * characters when displayed. 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected abstract char[] getOriginal(); 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns a parallel array of replacement characters for the ones 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * that are to be replaced. 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project protected abstract char[] getReplacement(); 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Returns a CharSequence that will mirror the contents of the 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * source CharSequence but with the characters in {@link #getOriginal} 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * replaced by ones from {@link #getReplacement}. 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public CharSequence getTransformation(CharSequence source, View v) { 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project char[] original = getOriginal(); 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project char[] replacement = getReplacement(); 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Short circuit for faster display if the text will never change. 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!(source instanceof Editable)) { 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Check whether the text does not contain any of the 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * source characters so can be used unchanged. 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean doNothing = true; 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int n = original.length; 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = 0; i < n; i++) { 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (TextUtils.indexOf(source, original[i]) >= 0) { 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project doNothing = false; 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project break; 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (doNothing) { 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return source; 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (!(source instanceof Spannable)) { 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * The text contains some of the source characters, 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * but they can be flattened out now instead of 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * at display time. 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (source instanceof Spanned) { 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return new SpannedString(new SpannedReplacementCharSequence( 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project (Spanned) source, 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project original, replacement)); 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return new ReplacementCharSequence(source, 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project original, 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project replacement).toString(); 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (source instanceof Spanned) { 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return new SpannedReplacementCharSequence((Spanned) source, 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project original, replacement); 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } else { 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return new ReplacementCharSequence(source, original, replacement); 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void onFocusChanged(View view, CharSequence sourceText, 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project boolean focused, int direction, 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project Rect previouslyFocusedRect) { 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project // This callback isn't used. 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static class ReplacementCharSequence 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project implements CharSequence, GetChars { 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private char[] mOriginal, mReplacement; 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public ReplacementCharSequence(CharSequence source, char[] original, 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project char[] replacement) { 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSource = source; 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mOriginal = original; 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mReplacement = replacement; 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int length() { 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mSource.length(); 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public char charAt(int i) { 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project char c = mSource.charAt(i); 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int n = mOriginal.length; 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int j = 0; j < n; j++) { 1289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (c == mOriginal[j]) { 1299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project c = mReplacement[j]; 1309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return c; 1349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public CharSequence subSequence(int start, int end) { 1379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project char[] c = new char[end - start]; 1389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project getChars(start, end, c, 0); 1409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return new String(c); 1419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public String toString() { 1449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project char[] c = new char[length()]; 1459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project getChars(0, length(), c, 0); 1479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return new String(c); 1489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void getChars(int start, int end, char[] dest, int off) { 1519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project TextUtils.getChars(mSource, start, end, dest, off); 1529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int offend = end - start + off; 1539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int n = mOriginal.length; 1549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int i = off; i < offend; i++) { 1569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project char c = dest[i]; 1579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project for (int j = 0; j < n; j++) { 1599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (c == mOriginal[j]) { 1609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project dest[i] = mReplacement[j]; 1619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private CharSequence mSource; 1679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static class SpannedReplacementCharSequence 1709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project extends ReplacementCharSequence 1719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project implements Spanned 1729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project { 1739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public SpannedReplacementCharSequence(Spanned source, char[] original, 1749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project char[] replacement) { 1759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super(source, original, replacement); 1769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSpanned = source; 1779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public CharSequence subSequence(int start, int end) { 1809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return new SpannedString(this).subSequence(start, end); 1819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public <T> T[] getSpans(int start, int end, Class<T> type) { 1849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mSpanned.getSpans(start, end, type); 1859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getSpanStart(Object tag) { 1889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mSpanned.getSpanStart(tag); 1899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getSpanEnd(Object tag) { 1929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mSpanned.getSpanEnd(tag); 1939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getSpanFlags(Object tag) { 1969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mSpanned.getSpanFlags(tag); 1979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int nextSpanTransition(int start, int end, Class type) { 2009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mSpanned.nextSpanTransition(start, end, type); 2019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 2039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private Spanned mSpanned; 2049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 2059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 206