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Optimize MessageTranslator to not use regex 

Regexes take up a performance penalty that we can circumvent by iterating over the legacy string once and applying the necessary workarounds.
This commit is contained in:
Camotoy 2021-11-29 14:04:44 -05:00
parent eb7d71017c
commit 840318bd8b
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GPG Key ID: 7EEFB66FE798081F
1 changed files with 29 additions and 15 deletions
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44
core/src/main/java/org/geysermc/geyser/translator/text/MessageTranslator.java
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@ -34,13 +34,13 @@ import net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer;
import net.kyori.adventure.text.serializer.plain.PlainTextComponentSerializer;
import org.geysermc.geyser.GeyserImpl;
import org.geysermc.geyser.session.GeyserSession;
import org.geysermc.geyser.text.MinecraftTranslationRegistry;
import org.geysermc.geyser.text.GsonComponentSerializerWrapper;
import org.geysermc.geyser.text.ChatColor;
import org.geysermc.geyser.text.GeyserLocale;
import org.geysermc.geyser.text.GsonComponentSerializerWrapper;
import org.geysermc.geyser.text.MinecraftTranslationRegistry;
import java.util.EnumMap;
import java.util.Map;
import java.util.regex.Pattern;
public class MessageTranslator {
// These are used for handling the translations of the messages
@ -59,11 +59,6 @@ public class MessageTranslator {
// Reset character
private static final String RESET = BASE + "r";
/* Various regexes to fix formatting for Bedrock's specifications */
private static final Pattern STRIKETHROUGH_UNDERLINE = Pattern.compile("\u00a7[mn]");
private static final Pattern COLOR_CHARACTERS = Pattern.compile("\u00a7([0-9a-f])");
private static final Pattern DOUBLE_RESET = Pattern.compile("\u00a7r\u00a7r");
static {
TEAM_COLORS.put(TeamColor.NONE, "");
@ -111,15 +106,34 @@ public class MessageTranslator {
String legacy = LegacyComponentSerializer.legacySection().serialize(message);
// Strip strikethrough and underline as they are not supported on bedrock
legacy = STRIKETHROUGH_UNDERLINE.matcher(legacy).replaceAll("");
StringBuilder finalLegacy = new StringBuilder();
char[] legacyChars = legacy.toCharArray();
boolean lastFormatReset = false;
for (int i = 0; i < legacyChars.length; i++) {
char legacyChar = legacyChars[i];
if (legacyChar != ChatColor.ESCAPE || i >= legacyChars.length - 1) {
// No special formatting for Bedrock needed
// Or, we're at the end of the string
finalLegacy.append(legacyChar);
lastFormatReset = false;
continue;
}
// Make color codes reset formatting like Java
// See https://minecraft.gamepedia.com/Formatting_codes#Usage
legacy = COLOR_CHARACTERS.matcher(legacy).replaceAll("\u00a7r\u00a7$1");
legacy = DOUBLE_RESET.matcher(legacy).replaceAll("\u00a7r");
char next = legacyChars[++i];
if (next != 'm' && next != 'n') {
// Strikethrough and underline do not exist on Bedrock
if ((next >= '0' && next <= '9') || (next >= 'a' && next <= 'f')) {
// Append this color code, as well as a necessary reset code
if (!lastFormatReset) {
finalLegacy.append(RESET);
}
}
finalLegacy.append(BASE).append(next);
}
lastFormatReset = next == 'r';
}
return legacy;
return finalLegacy.toString();
} catch (Exception e) {
GeyserImpl.getInstance().getLogger().debug(GSON_SERIALIZER.serialize(message));
GeyserImpl.getInstance().getLogger().error("Failed to parse message", e);