mirror of https://github.com/GeyserMC/Geyser.git
110 lines
6.0 KiB
Java
110 lines
6.0 KiB
Java
/*
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* Copyright (c) 2019-2022 GeyserMC. http://geysermc.org
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* @author GeyserMC
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* @link https://github.com/GeyserMC/Geyser
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*/
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package org.geysermc.geyser.translator.protocol.bedrock;
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import com.github.steveice10.mc.protocol.data.game.entity.object.Direction;
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import com.github.steveice10.mc.protocol.data.game.entity.player.Hand;
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import com.github.steveice10.mc.protocol.packet.ingame.serverbound.inventory.ServerboundContainerButtonClickPacket;
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import com.github.steveice10.mc.protocol.packet.ingame.serverbound.inventory.ServerboundContainerClosePacket;
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import com.github.steveice10.mc.protocol.packet.ingame.serverbound.player.ServerboundUseItemOnPacket;
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import org.cloudburstmc.protocol.bedrock.packet.LecternUpdatePacket;
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import org.geysermc.geyser.inventory.Inventory;
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import org.geysermc.geyser.inventory.LecternContainer;
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import org.geysermc.geyser.session.GeyserSession;
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import org.geysermc.geyser.translator.inventory.LecternInventoryTranslator;
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import org.geysermc.geyser.translator.protocol.PacketTranslator;
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import org.geysermc.geyser.translator.protocol.Translator;
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import org.geysermc.geyser.util.InventoryUtils;
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/**
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* Used to translate moving pages, or closing the inventory
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*/
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@Translator(packet = LecternUpdatePacket.class)
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public class BedrockLecternUpdateTranslator extends PacketTranslator<LecternUpdatePacket> {
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@Override
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public void translate(GeyserSession session, LecternUpdatePacket packet) {
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// TODO: Remove dropping book check here when 1.20.60 is no longer supported
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if (packet.isDroppingBook()) {
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// Bedrock drops the book outside of the GUI. Java drops it in the GUI
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// So, we enter the GUI and then drop it! :)
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session.setDroppingLecternBook(true);
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// Emulate an interact packet
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ServerboundUseItemOnPacket blockPacket = new ServerboundUseItemOnPacket(
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packet.getBlockPosition(),
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Direction.DOWN,
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Hand.MAIN_HAND,
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0, 0, 0, // Java doesn't care about these when dealing with a lectern
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false,
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session.getWorldCache().nextPredictionSequence());
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session.sendDownstreamGamePacket(blockPacket);
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} else {
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// Bedrock wants to either move a page or exit
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if (!(session.getOpenInventory() instanceof LecternContainer lecternContainer)) {
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session.getGeyser().getLogger().debug("Expected lectern but it wasn't open!");
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return;
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}
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if (lecternContainer.getCurrentBedrockPage() == packet.getPage()) {
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// The same page means Bedrock is closing the window
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ServerboundContainerClosePacket closeWindowPacket = new ServerboundContainerClosePacket(lecternContainer.getJavaId());
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session.sendDownstreamGamePacket(closeWindowPacket);
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InventoryUtils.closeInventory(session, lecternContainer.getJavaId(), false);
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} else {
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// Each "page" Bedrock gives to us actually represents two pages (think opening a book and seeing two pages)
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// Each "page" on Java is just one page (think a spiral notebook folded back to only show one page)
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int newJavaPage = (packet.getPage() * 2);
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int currentJavaPage = (lecternContainer.getCurrentBedrockPage() * 2);
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// So, fun fact: We need to separately handle fake lecterns!
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// Since those are not actually a real lectern... the Java server won't respond to our requests.
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if (!lecternContainer.isUsingRealBlock()) {
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LecternInventoryTranslator translator = (LecternInventoryTranslator) session.getInventoryTranslator();
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Inventory inventory = session.getOpenInventory();
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translator.updateProperty(session, inventory, 0, newJavaPage);
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return;
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}
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// Send as many click button packets as we need to
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// Java has the option to specify exact page numbers by adding 100 to the number, but buttonId variable
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// is a byte when transmitted over the network and therefore this stops us at 128
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if (newJavaPage > currentJavaPage) {
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for (int i = currentJavaPage; i < newJavaPage; i++) {
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ServerboundContainerButtonClickPacket clickButtonPacket = new ServerboundContainerButtonClickPacket(session.getOpenInventory().getJavaId(), 2);
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session.sendDownstreamGamePacket(clickButtonPacket);
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}
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} else {
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for (int i = currentJavaPage; i > newJavaPage; i--) {
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ServerboundContainerButtonClickPacket clickButtonPacket = new ServerboundContainerButtonClickPacket(session.getOpenInventory().getJavaId(), 1);
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session.sendDownstreamGamePacket(clickButtonPacket);
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}
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}
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}
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}
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}
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}
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