SChatPacket: hotbar

protocol/src/main/java/mc/protocol/State.java

@@ -50,19 +50,17 @@ public enum State {
 					0x0B, PingPacket.class,
 					0x0D, PlayerPositionPacket.class,
 					0x0E, CPlayerPositionAndLookPacket.class,
-					0x0F, PlayerLookPacket.class,
+					0x0F, PlayerLookPacket.class
-					0x15, EntityActionPacket.class,
-					0x1C, UpdateSignPacket.class
 			),
 			// client bound
 			Map.of(
+					SChatPacket.class, 0x0F,
 					PingPacket.class, 0x1F,
-					ChunkDataPacket.class, 0x20,
 					JoinGamePacket.class, 0x23,
-					OpenSignEditorPacket.class, 0x2A,
+					SpawnPositionPacket.class, 0x46,
+					ChunkDataPacket.class, 0x20,
 					PlayerAbilitiesPacket.class,0x2C,
-					SPlayerPositionAndLookPacket.class, 0x2F,
+					SPlayerPositionAndLookPacket.class, 0x2F
-					SpawnPositionPacket.class, 0x46
 			)
 	);
 

protocol/src/main/java/mc/protocol/model/text/TextColor.java

@@ -25,6 +25,12 @@ public enum TextColor {
 	WHITE      ("white",       'f');
 	//@formatter:on
 
+	public static final char SPECIAL_CHAR = '\u00a7';
+
 	private final String name;
 	private final char code;
+
+	public String toLegacy() {
+		return "" + SPECIAL_CHAR + code;
+	}
 }

protocol/src/main/java/mc/protocol/model/text/TextStyleLegacy.java

@@ -0,0 +1,20 @@
+package mc.protocol.model.text;
+
+import lombok.RequiredArgsConstructor;
+
+@RequiredArgsConstructor
+public enum TextStyleLegacy {
+
+	OBFUSCATED('k'),
+	BOLD('l'),
+	STRIKETHOUGH('m'),
+	UNDERLINE('n'),
+	ITALIC('o'),
+	RESET('r');
+
+	private final char code;
+
+	public String toLegacy() {
+		return "" + TextColor.SPECIAL_CHAR + code;
+	}
+}

protocol/src/main/java/mc/protocol/packets/client/EntityActionPacket.java

@@ -1,52 +0,0 @@
-package mc.protocol.packets.client;
-
-import lombok.EqualsAndHashCode;
-import lombok.Getter;
-import lombok.NoArgsConstructor;
-import lombok.ToString;
-import mc.protocol.io.NetByteBuf;
-import mc.protocol.packets.ClientSidePacket;
-import mc.protocol.utils.EntityActionAction;
-
-/**
- * Entity Action packet.
- *
- * <p>Структура пакета</p>
- * <pre>
- * | FIELD      | TYPE   | NOTES                                     |
- * |------------|--------|-------------------------------------------|
- * | Entity ID  | VarInt | ID игрока                                 |
- * | Action ID  | VarInt | ID действия                               |
- * | Jump Boost | VarInt | Используется только при "Action ID" = 5.  |
- * |            |        | В этом случае значение будет от 0 до 100. |
- * |            |        | В остальных случаях значение 0.           |
- * </pre>
- *
- * @see <a href="https://wiki.vg/index.php?title=Protocol&oldid=14204#Entity_Action" target="_top">Entity Action</a>
- */
-@NoArgsConstructor
-@Getter
-@EqualsAndHashCode
-@ToString
-public class EntityActionPacket implements ClientSidePacket {
-
-	private Integer entityId;
-	private EntityActionAction action;
-	private Integer jumpBoost;
-
-	@Override
-	public void readSelf(NetByteBuf netByteBuf) {
-		this.entityId = netByteBuf.readVarInt();
-		int actionId = netByteBuf.readVarInt();
-		this.jumpBoost = netByteBuf.readVarInt();
-
-		this.action = EntityActionAction.valueOfCode(actionId);
-	}
-
-	@Override
-	public void passivate() {
-		this.entityId = null;
-		this.action = null;
-		this.jumpBoost = null;
-	}
-}

protocol/src/main/java/mc/protocol/packets/client/UpdateSignPacket.java

@@ -1,57 +0,0 @@
-package mc.protocol.packets.client;
-
-import lombok.EqualsAndHashCode;
-import lombok.Getter;
-import lombok.NoArgsConstructor;
-import lombok.ToString;
-import mc.protocol.io.NetByteBuf;
-import mc.protocol.model.Location;
-import mc.protocol.packets.ClientSidePacket;
-import mc.protocol.packets.server.OpenSignEditorPacket;
-import mc.protocol.serializer.LocationSerializer;
-
-/**
- * Update Sign packet.
- *
- * <p>Отправляется клиентом, когда нажата кнопка "Done" в окне редактирования таблички.</p>
- *
- * <p>Структура пакета</p>
- * <pre>
- * | FIELD    | TYPE         | NOTES                          |
- * |----------|--------------|--------------------------------|
- * | Location | Location     | Позиция редактируемой табилчки |
- * | Line 1   | String (384) | Строка таблички                |
- * | Line 2   | String (384) | Строка таблички                |
- * | Line 3   | String (384) | Строка таблички                |
- * | Line 4   | String (384) | Строка таблички                |
- * </pre>
- *
- * @see <a href="https://wiki.vg/index.php?title=Protocol&oldid=14204#Update_Sign" target="_top">Update Sign</a>
- * @see OpenSignEditorPacket
- */
-@NoArgsConstructor
-@Getter
-@EqualsAndHashCode
-@ToString
-public class UpdateSignPacket implements ClientSidePacket {
-
-	private Location location;
-	@SuppressWarnings("MismatchedReadAndWriteOfArray")
-	private String[] lines;
-
-	@Override
-	public void readSelf(NetByteBuf netByteBuf) {
-		this.location = LocationSerializer.fromLongValue(netByteBuf.readLong());
-		this.lines = new String[4];
-		this.lines[0] = netByteBuf.readString(384);
-		this.lines[1] = netByteBuf.readString(384);
-		this.lines[2] = netByteBuf.readString(384);
-		this.lines[3] = netByteBuf.readString(384);
-	}
-
-	@Override
-	public void passivate() {
-		this.location = null;
-		this.lines = null;
-	}
-}

protocol/src/main/java/mc/protocol/packets/server/OpenSignEditorPacket.java

@@ -1,33 +0,0 @@
-package mc.protocol.packets.server;
-
-import lombok.Data;
-import mc.protocol.io.NetByteBuf;
-import mc.protocol.model.Location;
-import mc.protocol.packets.ServerSidePacket;
-import mc.protocol.packets.client.UpdateSignPacket;
-import mc.protocol.serializer.LocationSerializer;
-
-/**
- * Открыть окно редактирования таблички.
- *
- * <p>Структура пакета</p>
- * <pre>
- * | FIELD    | TYPE     | NOTES |
- * |----------|----------|-------|
- * | Location | Location |       |
- * </pre>
- *
- * @see <a href="https://wiki.vg/index.php?title=Protocol&oldid=14204#Open_Sign_Editor">Open Sign Editor</a>
- * @see UpdateSignPacket
- */
-@Data
-public class OpenSignEditorPacket implements ServerSidePacket {
-
-	private Location location;
-
-	@Override
-	public void writeSelf(NetByteBuf netByteBuf) {
-		long value = LocationSerializer.toLongValue(this.location);
-		netByteBuf.writeLong(value);
-	}
-}

protocol/src/main/java/mc/protocol/packets/server/SChatPacket.java

@@ -0,0 +1,43 @@
+package mc.protocol.packets.server;
+
+import lombok.Data;
+import mc.protocol.io.NetByteBuf;
+import mc.protocol.model.text.Text;
+import mc.protocol.model.text.TextColor;
+import mc.protocol.model.text.TextStyle;
+import mc.protocol.packets.ServerSidePacket;
+import mc.protocol.serializer.TextSerializer;
+import mc.protocol.utils.ChatPosition;
+
+/**
+ * Chat packet.
+ *
+ * <p>Структура пакета</p>
+ * <pre>
+ * | FIELD     | TYPE | NOTES                                         |
+ * |-----------|------|-----------------------------------------------|
+ * | JSON Data | Text | Текст*                                        |
+ * | Position  | Byte | 0 - сообщение чата                            |
+ * |           |      | 1 - системное сообщение (отображается в чате) |
+ * |           |      | 2 - над панелью быстрого доступа (hotbar)     |
+ * </pre>
+ *
+ * <p>
+ *     * - стоит обратить внимание, что {@link TextColor} и {@link TextStyle} не работают: клиент не применяет
+ *     стилистику в таком виде. Однако метод через символ "§" (\<span>u00a7</span>) работает.
+ * </p>
+ *
+ * @see <a href="https://wiki.vg/index.php?title=Protocol&oldid=14204#Chat_Message_.28clientbound.29">Chat Message (clientbound)</a>
+ */
+@Data
+public class SChatPacket implements ServerSidePacket {
+
+	private Text message;
+	private ChatPosition position;
+
+	@Override
+	public void writeSelf(NetByteBuf netByteBuf) {
+		netByteBuf.writeString(TextSerializer.toJsonObject(this.message).toString());
+		netByteBuf.writeByte(this.position.getCode());
+	}
+}

protocol/src/main/java/mc/protocol/packets/server/SpawnPositionPacket.java

@@ -4,7 +4,6 @@ import lombok.Data;
 import mc.protocol.io.NetByteBuf;
 import mc.protocol.model.Location;
 import mc.protocol.packets.ServerSidePacket;
-import mc.protocol.serializer.LocationSerializer;
 
 /**
  * Спавн позиция игрока.
@@ -15,7 +14,7 @@ import mc.protocol.serializer.LocationSerializer;
  * <pre>
  * | FIELD    | TYPE     | NOTES                 |
  * |----------|----------|-----------------------|
- * | Location | Location | Локация спавна игрока |
+ * | Location | Position | Локация спавна игрока |
  * </pre>
  *
  * @see <a href="https://wiki.vg/index.php?title=Protocol&oldid=14204#Spawn_Position">Spawn Position</a>
@@ -27,7 +26,16 @@ public class SpawnPositionPacket implements ServerSidePacket {
 
 	@Override
 	public void writeSelf(NetByteBuf netByteBuf) {
-		long spawnSerialized = LocationSerializer.toLongValue(this.spawn);
+		long spawnSerialized =
+				((long) (floorDouble(spawn.getX()) & 0x3FFFFFF) << 38)
+				| ((long) (floorDouble(spawn.getY()) & 0xFFF) << 26)
+				| (floorDouble(spawn.getZ()) & 0x3FFFFFF);
 		netByteBuf.writeLong(spawnSerialized);
 	}
+
+	private static int floorDouble(double value) {
+		int i = (int) value;
+		return value < (double) i ? i - 1 : i;
+	}
+
 }

protocol/src/main/java/mc/protocol/serializer/LocationSerializer.java

@@ -1,26 +0,0 @@
-package mc.protocol.serializer;
-
-import lombok.experimental.UtilityClass;
-import mc.protocol.model.Location;
-
-@UtilityClass
-public class LocationSerializer {
-
-	public long toLongValue(Location location) {
-		return ((long) (floorDouble(location.getX()) & 0x3FFFFFF) << 38)
-				| ((long) (floorDouble(location.getY()) & 0xFFF) << 26)
-				| (floorDouble(location.getZ()) & 0x3FFFFFF);
-	}
-
-	public Location fromLongValue(long value) {
-		return new Location(
-				value >> 38,
-				(value >> 26) & 0xFFF,
-				value << 38 >> 38);
-	}
-
-	private static int floorDouble(double value) {
-		int i = (int) value;
-		return value < (double) i ? i - 1 : i;
-	}
-}

protocol/src/main/java/mc/protocol/utils/ChatPosition.java

@@ -0,0 +1,15 @@
+package mc.protocol.utils;
+
+import lombok.Getter;
+import lombok.RequiredArgsConstructor;
+
+@RequiredArgsConstructor
+public enum ChatPosition {
+
+	CHAT(0),
+	SYSTEM(1),
+	HOTBAR(2);
+
+	@Getter
+	private final int code;
+}

protocol/src/main/java/mc/protocol/utils/EntityActionAction.java

@@ -1,33 +0,0 @@
-package mc.protocol.utils;
-
-import lombok.Getter;
-import lombok.RequiredArgsConstructor;
-
-import javax.annotation.Nullable;
-
-@RequiredArgsConstructor
-public enum EntityActionAction {
-	START_SNEAKING(0),
-	STOP_SNEAKING(1),
-	LEAVE_BED(2),
-	START_SPRINTING(3),
-	STOP_SPRINTING(4),
-	START_JUMP_WITH_HORSE(5),
-	STOP_JUMP_WITH_HORSE(6),
-	OPEN_HORSE_INVENTORY(7),
-	START_FLYING_WITH_ELYTRA(8);
-
-	@Nullable
-	public static EntityActionAction valueOfCode(int code) {
-		for (EntityActionAction action : EntityActionAction.values()) {
-			if (action.code == code) {
-				return action;
-			}
-		}
-
-		return null;
-	}
-
-	@Getter
-	private final int code;
-}

server/src/main/java/mc/server/PacketHandler.java

@@ -7,12 +7,16 @@ import mc.protocol.api.ConnectionContext;
 import mc.protocol.model.Location;
 import mc.protocol.model.Look;
 import mc.protocol.model.ServerInfo;
+import mc.protocol.model.text.Text;
+import mc.protocol.model.text.TextColor;
+import mc.protocol.model.text.TextStyleLegacy;
 import mc.protocol.packets.PingPacket;
 import mc.protocol.packets.client.HandshakePacket;
 import mc.protocol.packets.client.LoginStartPacket;
 import mc.protocol.packets.client.StatusServerRequestPacket;
 import mc.protocol.packets.server.*;
 import mc.protocol.serializer.TextSerializer;
+import mc.protocol.utils.ChatPosition;
 import mc.protocol.utils.Difficulty;
 import mc.protocol.utils.GameMode;
 import mc.protocol.utils.LevelType;
@@ -125,10 +129,25 @@ public class PacketHandler {
 
 		// -- Эксперименты -- //
 
-		var openSignEditorPacket = new OpenSignEditorPacket();
+		var chatPacket = new SChatPacket();
-		openSignEditorPacket.setLocation(spawnLocation);
+		chatPacket.setMessage(Text.of(TextColor.RED.toLegacy() + "== Hello! =="));
+		chatPacket.setPosition(ChatPosition.CHAT);
 
-		context.sendNow(openSignEditorPacket);
+		context.send(chatPacket);
+
+		var systemChatPacket = new SChatPacket();
+		systemChatPacket.setMessage(Text.of(TextColor.RED.toLegacy() + "[SYSTEM]"));
+		systemChatPacket.setPosition(ChatPosition.SYSTEM);
+
+		context.send(systemChatPacket);
+
+		var hotbarChatPacket = new SChatPacket();
+		hotbarChatPacket.setMessage(Text.of(TextColor.RED.toLegacy() + TextStyleLegacy.BOLD.toLegacy() + "In game info"));
+		hotbarChatPacket.setPosition(ChatPosition.HOTBAR);
+
+		context.send(hotbarChatPacket);
+
+		context.flushSending();
 	}
 
 	private static String faviconToBase64(Path iconPath) {