mirror of
https://github.com/GeyserMC/Geyser.git
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147 lines
6.7 KiB
Java
147 lines
6.7 KiB
Java
/*
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* Copyright (c) 2019-2021 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.metadata.ItemStack;
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import com.github.steveice10.mc.protocol.packet.ingame.serverbound.inventory.ServerboundEditBookPacket;
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import com.github.steveice10.opennbt.tag.builtin.CompoundTag;
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import com.github.steveice10.opennbt.tag.builtin.ListTag;
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import com.github.steveice10.opennbt.tag.builtin.StringTag;
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import com.github.steveice10.opennbt.tag.builtin.Tag;
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import com.nukkitx.protocol.bedrock.packet.BookEditPacket;
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import org.geysermc.geyser.inventory.GeyserItemStack;
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import org.geysermc.geyser.session.GeyserSession;
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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 java.nio.charset.StandardCharsets;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.LinkedList;
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import java.util.List;
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@Translator(packet = BookEditPacket.class)
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public class BedrockBookEditTranslator extends PacketTranslator<BookEditPacket> {
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private static final int MAXIMUM_PAGE_LENGTH = 8192 * 4;
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private static final int MAXIMUM_TITLE_LENGTH = 128 * 4;
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@Override
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public void translate(GeyserSession session, BookEditPacket packet) {
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if (packet.getText() != null && !packet.getText().isEmpty() && packet.getText().getBytes(StandardCharsets.UTF_8).length > MAXIMUM_PAGE_LENGTH) {
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session.getGeyser().getLogger().warning("Page length greater than server allowed!");
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return;
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}
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GeyserItemStack itemStack = session.getPlayerInventory().getItemInHand();
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if (itemStack != null) {
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CompoundTag tag = itemStack.getNbt() != null ? itemStack.getNbt() : new CompoundTag("");
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ItemStack bookItem = new ItemStack(itemStack.getJavaId(), itemStack.getAmount(), tag);
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List<Tag> pages = tag.contains("pages") ? new LinkedList<>(((ListTag) tag.get("pages")).getValue()) : new LinkedList<>();
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int page = packet.getPageNumber();
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switch (packet.getAction()) {
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case ADD_PAGE: {
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// Add empty pages in between
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for (int i = pages.size(); i < page; i++) {
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pages.add(i, new StringTag("", ""));
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}
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pages.add(page, new StringTag("", packet.getText()));
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break;
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}
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// Called whenever a page is modified
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case REPLACE_PAGE: {
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if (page < pages.size()) {
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pages.set(page, new StringTag("", packet.getText()));
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} else {
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// Add empty pages in between
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for (int i = pages.size(); i < page; i++) {
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pages.add(i, new StringTag("", ""));
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}
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pages.add(page, new StringTag("", packet.getText()));
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}
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break;
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}
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case DELETE_PAGE: {
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if (page < pages.size()) {
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pages.remove(page);
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}
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break;
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}
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case SWAP_PAGES: {
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int page2 = packet.getSecondaryPageNumber();
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if (page < pages.size() && page2 < pages.size()) {
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Collections.swap(pages, page, page2);
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}
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break;
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}
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case SIGN_BOOK: {
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tag.put(new StringTag("author", packet.getAuthor()));
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tag.put(new StringTag("title", packet.getTitle()));
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break;
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}
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default:
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return;
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}
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// Remove empty pages at the end
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while (pages.size() > 0) {
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StringTag currentPage = (StringTag) pages.get(pages.size() - 1);
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if (currentPage.getValue() == null || currentPage.getValue().isEmpty()) {
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pages.remove(pages.size() - 1);
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} else {
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break;
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}
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}
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tag.put(new ListTag("pages", pages));
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// Update local copy
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session.getPlayerInventory().setItem(36 + session.getPlayerInventory().getHeldItemSlot(), GeyserItemStack.from(bookItem), session);
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session.getInventoryTranslator().updateInventory(session, session.getPlayerInventory());
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List<String> networkPages = new ArrayList<>();
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for (Tag pageTag : pages) {
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networkPages.add(((StringTag) pageTag).getValue());
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}
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String title;
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if (packet.getAction() == BookEditPacket.Action.SIGN_BOOK) {
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// Add title to packet so the server knows we're signing
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if (packet.getTitle().getBytes(StandardCharsets.UTF_8).length > MAXIMUM_TITLE_LENGTH) {
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session.getGeyser().getLogger().warning("Book title larger than server allows!");
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return;
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}
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title = packet.getTitle();
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} else {
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title = null;
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}
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session.getBookEditCache().setPacket(new ServerboundEditBookPacket(session.getPlayerInventory().getHeldItemSlot(), networkPages, title));
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// There won't be any more book updates after this, so we can try sending the edit packet immediately
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if (packet.getAction() == BookEditPacket.Action.SIGN_BOOK) {
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session.getBookEditCache().checkForSend();
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}
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}
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}
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}
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