Code/net/minecraft/util/StringUtil.java

package net.minecraft.util;

import java.util.Locale;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.annotation.Nullable;
import org.apache.commons.lang3.StringUtils;

public class StringUtil {
    private static final Pattern STRIP_COLOR_PATTERN = Pattern.compile("(?i)\\u00A7[0-9A-FK-OR]");
    private static final Pattern LINE_PATTERN = Pattern.compile("\\r\\n|\\v");
    private static final Pattern LINE_END_PATTERN = Pattern.compile("(?:\\r\\n|\\v)$");

    public static String formatTickDuration(int p_14405_, float p_313197_) {
        int i = Mth.floor(p_14405_ / p_313197_);
        int j = i / 60;
        i %= 60;
        int k = j / 60;
        j %= 60;
        return k > 0 ? String.format(Locale.ROOT, "%02d:%02d:%02d", k, j, i) : String.format(Locale.ROOT, "%02d:%02d", j, i);
    }

    public static String stripColor(String p_14407_) {
        return STRIP_COLOR_PATTERN.matcher(p_14407_).replaceAll("");
    }

    public static boolean isNullOrEmpty(@Nullable String p_14409_) {
        return StringUtils.isEmpty(p_14409_);
    }

    public static String truncateStringIfNecessary(String p_144999_, int p_145000_, boolean p_145001_) {
        if (p_144999_.length() <= p_145000_) {
            return p_144999_;
        } else {
            return p_145001_ && p_145000_ > 3 ? p_144999_.substring(0, p_145000_ - 3) + "..." : p_144999_.substring(0, p_145000_);
        }
    }

    public static int lineCount(String p_145003_) {
        if (p_145003_.isEmpty()) {
            return 0;
        } else {
            Matcher matcher = LINE_PATTERN.matcher(p_145003_);
            int i = 1;

            while (matcher.find()) {
                i++;
            }

            return i;
        }
    }

    public static boolean endsWithNewLine(String p_145005_) {
        return LINE_END_PATTERN.matcher(p_145005_).find();
    }

    public static String trimChatMessage(String p_216470_) {
        return truncateStringIfNecessary(p_216470_, 256, false);
    }

    public static boolean isAllowedChatCharacter(char p_336025_) {
        return p_336025_ != 167 && p_336025_ >= ' ' && p_336025_ != 127;
    }

    public static boolean isValidPlayerName(String p_328576_) {
        return p_328576_.length() > 16 ? false : p_328576_.chars().filter(p_333267_ -> p_333267_ <= 32 || p_333267_ >= 127).findAny().isEmpty();
    }

    public static String filterText(String p_329405_) {
        return filterText(p_329405_, false);
    }

    public static String filterText(String p_335196_, boolean p_329791_) {
        StringBuilder stringbuilder = new StringBuilder();

        for (char c0 : p_335196_.toCharArray()) {
            if (isAllowedChatCharacter(c0)) {
                stringbuilder.append(c0);
            } else if (p_329791_ && c0 == '\n') {
                stringbuilder.append(c0);
            }
        }

        return stringbuilder.toString();
    }

    public static boolean isWhitespace(int p_332672_) {
        return Character.isWhitespace(p_332672_) || Character.isSpaceChar(p_332672_);
    }

    public static boolean isBlank(@Nullable String p_334499_) {
        return p_334499_ != null && !p_334499_.isEmpty() ? p_334499_.chars().allMatch(StringUtil::isWhitespace) : true;
    }
}