77 lines
2.3 KiB
Java
77 lines
2.3 KiB
Java
/*
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* Twidere - Twitter client for Android
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*
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* Copyright (C) 2012-2015 Mariotaku Lee <mariotaku.lee@gmail.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.mariotaku.twidere.util;
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import android.support.annotation.NonNull;
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import org.apache.commons.lang3.ArrayUtils;
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/**
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* Created by mariotaku on 15/11/4.
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*/
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public final class CodePointArray {
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private final int[] codePoints;
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private final int length;
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public CodePointArray(@NonNull final CharSequence cs) {
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final int inputLength = cs.length();
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codePoints = new int[inputLength];
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int codePointsLength = 0;
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for (int offset = 0; offset < inputLength; ) {
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final int codePoint = Character.codePointAt(cs, offset);
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codePoints[codePointsLength++] = codePoint;
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offset += Character.charCount(codePoint);
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}
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this.length = codePointsLength;
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}
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public int get(int pos) {
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return codePoints[pos];
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}
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public int length() {
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return length;
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}
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public int indexOfText(int codePoint, int start) {
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int index = 0;
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for (int i = 0; i < length; i++) {
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final int current = codePoints[i];
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if (current == codePoint && i >= start) return index;
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index += Character.charCount(current);
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}
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return -1;
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}
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@NonNull
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public String substring(int start, int end) {
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final StringBuilder sb = new StringBuilder();
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for (int i = start; i < end; i++) {
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sb.appendCodePoint(codePoints[i]);
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}
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return sb.toString();
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}
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public int[] subarray(int start, int end) {
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return ArrayUtils.subarray(codePoints, start, end);
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}
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}
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