package com.mylhyl.circledialog.internal;
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import android.text.InputFilter;
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import android.text.Spanned;
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import java.util.regex.Pattern;
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/**
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* Created by hupei on 2018/11/1 11:21.
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*/
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public class EmojiFilter implements InputFilter {
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Pattern emojiPattern = Pattern.compile("[\ud83c\udc00-\ud83c\udfff]|[\ud83d\udc00-\ud83d\udfff]|[\u2600-\u27ff]",
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Pattern.UNICODE_CASE | Pattern.CASE_INSENSITIVE);
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public EmojiFilter() {
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}
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/**
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* 检测是否有emoji表情
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*
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* @param source
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* @return
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*/
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private static boolean containsEmoji(CharSequence source) {
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int len = source.length();
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for (int i = 0; i < len; i++) {
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char codePoint = source.charAt(i);
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// 如果不能匹配,则该字符是Emoji表情
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if (!isEmojiCharacter(codePoint)) {
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return true;
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}
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}
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return false;
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}
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/**
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* 判断是否是Emoji
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*
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* @param codePoint 比较的单个字符
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* @return
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*/
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private static boolean isEmojiCharacter(char codePoint) {
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return (codePoint == 0x0) || (codePoint == 0x9) || (codePoint == 0xA) ||
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(codePoint == 0xD) || ((codePoint >= 0x20) && (codePoint <= 0xD7FF)) ||
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((codePoint >= 0xE000) && (codePoint <= 0xFFFD)) || ((codePoint >= 0x10000)
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&& (codePoint <= 0x10FFFF));
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}
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@Override
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public CharSequence filter(CharSequence source, int start, int end, Spanned dest, int dstart, int dend) {
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if (this.emojiPattern.matcher(source).find() || containsEmoji(source)) {
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return "";
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}
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return source;
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}
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}
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