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; 189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project// XXX should this really be in the public API at all? 209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project/** 219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * An AlteredCharSequence is a CharSequence that is largely mirrored from 229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * another CharSequence, except that a specified range of characters are 239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * mirrored from a different char array instead. 249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectpublic class AlteredCharSequence 269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Projectimplements CharSequence, GetChars 279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project{ 289066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /** 299066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * Create an AlteredCharSequence whose text (and possibly spans) 309066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * are mirrored from <code>source</code>, except that the range of 319066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * offsets <code>substart</code> inclusive to <code>subend</code> exclusive 329066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project * are mirrored instead from <code>sub</code>, beginning at offset 0. 339066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project */ 349066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public static AlteredCharSequence make(CharSequence source, char[] sub, 359066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int substart, int subend) { 369066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (source instanceof Spanned) 379066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return new AlteredSpanned(source, sub, substart, subend); 389066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project else 399066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return new AlteredCharSequence(source, sub, substart, subend); 409066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 419066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 429066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private AlteredCharSequence(CharSequence source, char[] sub, 439066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int substart, int subend) { 449066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSource = source; 459066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mChars = sub; 469066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mStart = substart; 479066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mEnd = subend; 489066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 499066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 509066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project /* package */ void update(char[] sub, int substart, int subend) { 519066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mChars = sub; 529066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mStart = substart; 539066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mEnd = subend; 549066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 559066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 569066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private static class AlteredSpanned 579066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project extends AlteredCharSequence 589066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project implements Spanned 599066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project { 609066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private AlteredSpanned(CharSequence source, char[] sub, 619066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int substart, int subend) { 629066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project super(source, sub, substart, subend); 639066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mSpanned = (Spanned) source; 649066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 659066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 669066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public <T> T[] getSpans(int start, int end, Class<T> kind) { 679066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mSpanned.getSpans(start, end, kind); 689066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 699066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 709066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getSpanStart(Object span) { 719066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mSpanned.getSpanStart(span); 729066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 739066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 749066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getSpanEnd(Object span) { 759066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mSpanned.getSpanEnd(span); 769066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 779066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 789066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int getSpanFlags(Object span) { 799066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mSpanned.getSpanFlags(span); 809066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 819066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 829066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int nextSpanTransition(int start, int end, Class kind) { 839066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mSpanned.nextSpanTransition(start, end, kind); 849066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 859066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 869066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private Spanned mSpanned; 879066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 889066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 899066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public char charAt(int off) { 909066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (off >= mStart && off < mEnd) 919066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mChars[off - mStart]; 929066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project else 939066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mSource.charAt(off); 949066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 959066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 969066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public int length() { 979066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return mSource.length(); 989066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 999066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1009066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public CharSequence subSequence(int start, int end) { 1019066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return AlteredCharSequence.make(mSource.subSequence(start, end), 1029066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project mChars, mStart - start, mEnd - start); 1039066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1049066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1059066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public void getChars(int start, int end, char[] dest, int off) { 1069066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project TextUtils.getChars(mSource, start, end, dest, off); 1079066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1089066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project start = Math.max(mStart, start); 1099066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project end = Math.min(mEnd, end); 1109066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1119066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project if (start > end) 1129066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project System.arraycopy(mChars, start - mStart, dest, off, end - start); 1139066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1149066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1159066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project public String toString() { 1169066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project int len = length(); 1179066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1189066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project char[] ret = new char[len]; 1199066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project getChars(0, len, ret, 0); 1209066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project return String.valueOf(ret); 1219066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project } 1229066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project 1239066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mStart; 1249066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private int mEnd; 1259066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private char[] mChars; 1269066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project private CharSequence mSource; 1279066cfe9886ac131c34d59ed0e2d287b0e3c0087The Android Open Source Project} 128