LastSeenMessagesTracker.java

net.minecraft.network.chat.LastSeenMessagesTracker

信息

• 全限定名：net.minecraft.network.chat.LastSeenMessagesTracker
• 类型：public class
• 包：net.minecraft.network.chat
• 源码路径：src/main/java/net/minecraft/network/chat/LastSeenMessagesTracker.java
• 起始行号：L9
• 职责：

  TODO

字段/常量

• trackedMessages

  • 类型: LastSeenTrackedEntry[]
  • 修饰符: private final
  • 源码定位: L10
  • 说明:

    TODO

• tail

  • 类型: int
  • 修饰符: private
  • 源码定位: L11
  • 说明:

    TODO

• offset

  • 类型: int
  • 修饰符: private
  • 源码定位: L12
  • 说明:

    TODO

• lastTrackedMessage

  • 类型: MessageSignature
  • 修饰符: private
  • 源码定位: L13
  • 说明:

    TODO

内部类/嵌套类型

• net.minecraft.network.chat.LastSeenMessagesTracker.Update
  • 类型: record
  • 修饰符: public
  • 源码定位: L76
  • 说明:

    TODO

构造器

public LastSeenMessagesTracker(int lastSeenCount) @ L15

• 构造器名：LastSeenMessagesTracker
• 源码定位：L15
• 修饰符：public

参数:

• lastSeenCount: int

说明:

TODO

方法

下面的方法块按源码顺序生成。

public boolean addPending(MessageSignature message, boolean wasShown) @ L19

• 方法名：addPending
• 源码定位：L19
• 返回类型：boolean
• 修饰符：public

参数:

• message: MessageSignature
• wasShown: boolean

说明:

TODO

private void addEntry(LastSeenTrackedEntry entry) @ L29

• 方法名：addEntry
• 源码定位：L29
• 返回类型：void
• 修饰符：private

参数:

• entry: LastSeenTrackedEntry

说明:

TODO

public void ignorePending(MessageSignature pendingMessage) @ L36

• 方法名：ignorePending
• 源码定位：L36
• 返回类型：void
• 修饰符：public

参数:

• pendingMessage: MessageSignature

说明:

TODO

public int getAndClearOffset() @ L46

• 方法名：getAndClearOffset
• 源码定位：L46
• 返回类型：int
• 修饰符：public

参数:

• 无

说明:

TODO

public LastSeenMessagesTracker.Update generateAndApplyUpdate() @ L52

• 方法名：generateAndApplyUpdate
• 源码定位：L52
• 返回类型：LastSeenMessagesTracker.Update
• 修饰符：public

参数:

• 无

说明:

TODO

public int offset() @ L72

• 方法名：offset
• 源码定位：L72
• 返回类型：int
• 修饰符：public

参数:

• 无

说明:

TODO

代码

public class LastSeenMessagesTracker {
    private final @Nullable LastSeenTrackedEntry[] trackedMessages;
    private int tail;
    private int offset;
    private @Nullable MessageSignature lastTrackedMessage;
 
    public LastSeenMessagesTracker(int lastSeenCount) {
        this.trackedMessages = new LastSeenTrackedEntry[lastSeenCount];
    }
 
    public boolean addPending(MessageSignature message, boolean wasShown) {
        if (Objects.equals(message, this.lastTrackedMessage)) {
            return false;
        } else {
            this.lastTrackedMessage = message;
            this.addEntry(wasShown ? new LastSeenTrackedEntry(message, true) : null);
            return true;
        }
    }
 
    private void addEntry(@Nullable LastSeenTrackedEntry entry) {
        int index = this.tail;
        this.tail = (index + 1) % this.trackedMessages.length;
        this.offset++;
        this.trackedMessages[index] = entry;
    }
 
    public void ignorePending(MessageSignature pendingMessage) {
        for (int i = 0; i < this.trackedMessages.length; i++) {
            LastSeenTrackedEntry entry = this.trackedMessages[i];
            if (entry != null && entry.pending() && pendingMessage.equals(entry.signature())) {
                this.trackedMessages[i] = null;
                break;
            }
        }
    }
 
    public int getAndClearOffset() {
        int originalOffset = this.offset;
        this.offset = 0;
        return originalOffset;
    }
 
    public LastSeenMessagesTracker.Update generateAndApplyUpdate() {
        int offset = this.getAndClearOffset();
        BitSet acknowledged = new BitSet(this.trackedMessages.length);
        ObjectList<MessageSignature> lastSeenEntries = new ObjectArrayList<>(this.trackedMessages.length);
 
        for (int i = 0; i < this.trackedMessages.length; i++) {
            int index = (this.tail + i) % this.trackedMessages.length;
            LastSeenTrackedEntry message = this.trackedMessages[index];
            if (message != null) {
                acknowledged.set(i, true);
                lastSeenEntries.add(message.signature());
                this.trackedMessages[index] = message.acknowledge();
            }
        }
 
        LastSeenMessages lastSeen = new LastSeenMessages(lastSeenEntries);
        LastSeenMessages.Update update = new LastSeenMessages.Update(offset, acknowledged, lastSeen.computeChecksum());
        return new LastSeenMessagesTracker.Update(lastSeen, update);
    }
 
    public int offset() {
        return this.offset;
    }
 
    public record Update(LastSeenMessages lastSeen, LastSeenMessages.Update update) {
    }
}

引用的其他类

• LastSeenMessages

  • 引用位置: 方法调用/构造调用
  • 关联成员: LastSeenMessages(), LastSeenMessages.Update(), Update()

• LastSeenTrackedEntry

  • 引用位置: 参数/字段/构造调用
  • 关联成员: LastSeenTrackedEntry()

• MessageSignature

  • 引用位置: 参数/字段