Code/net/minecraft/client/gui/screens/PresetFlatWorldScreen.java

package net.minecraft.client.gui.screens;

import com.google.common.base.Splitter;
import com.google.common.collect.Lists;
import com.mojang.logging.LogUtils;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Optional;
import java.util.Set;
import java.util.stream.Collectors;
import javax.annotation.Nullable;
import net.minecraft.client.Minecraft;
import net.minecraft.client.gui.GuiGraphics;
import net.minecraft.client.gui.components.Button;
import net.minecraft.client.gui.components.EditBox;
import net.minecraft.client.gui.components.ObjectSelectionList;
import net.minecraft.client.gui.navigation.CommonInputs;
import net.minecraft.client.gui.screens.worldselection.WorldCreationContext;
import net.minecraft.client.renderer.RenderType;
import net.minecraft.core.Holder;
import net.minecraft.core.HolderGetter;
import net.minecraft.core.RegistryAccess;
import net.minecraft.core.registries.Registries;
import net.minecraft.network.chat.CommonComponents;
import net.minecraft.network.chat.Component;
import net.minecraft.resources.ResourceKey;
import net.minecraft.resources.ResourceLocation;
import net.minecraft.tags.FlatLevelGeneratorPresetTags;
import net.minecraft.world.flag.FeatureFlagSet;
import net.minecraft.world.item.Item;
import net.minecraft.world.item.ItemStack;
import net.minecraft.world.level.biome.Biome;
import net.minecraft.world.level.biome.Biomes;
import net.minecraft.world.level.block.Block;
import net.minecraft.world.level.dimension.DimensionType;
import net.minecraft.world.level.levelgen.flat.FlatLayerInfo;
import net.minecraft.world.level.levelgen.flat.FlatLevelGeneratorPreset;
import net.minecraft.world.level.levelgen.flat.FlatLevelGeneratorSettings;
import net.minecraft.world.level.levelgen.placement.PlacedFeature;
import net.minecraft.world.level.levelgen.structure.StructureSet;
import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.api.distmarker.OnlyIn;
import org.slf4j.Logger;

@OnlyIn(Dist.CLIENT)
public class PresetFlatWorldScreen extends Screen {
    static final ResourceLocation SLOT_SPRITE = ResourceLocation.withDefaultNamespace("container/slot");
    static final Logger LOGGER = LogUtils.getLogger();
    private static final int SLOT_BG_SIZE = 18;
    private static final int SLOT_STAT_HEIGHT = 20;
    private static final int SLOT_BG_X = 1;
    private static final int SLOT_BG_Y = 1;
    private static final int SLOT_FG_X = 2;
    private static final int SLOT_FG_Y = 2;
    private static final ResourceKey<Biome> DEFAULT_BIOME = Biomes.PLAINS;
    public static final Component UNKNOWN_PRESET = Component.translatable("flat_world_preset.unknown");
    private final CreateFlatWorldScreen parent;
    private Component shareText;
    private Component listText;
    private PresetFlatWorldScreen.PresetsList list;
    private Button selectButton;
    EditBox export;
    FlatLevelGeneratorSettings settings;

    public PresetFlatWorldScreen(CreateFlatWorldScreen p_96379_) {
        super(Component.translatable("createWorld.customize.presets.title"));
        this.parent = p_96379_;
    }

    @Nullable
    private static FlatLayerInfo getLayerInfoFromString(HolderGetter<Block> p_259695_, String p_259185_, int p_259723_) {
        List<String> list = Splitter.on('*').limit(2).splitToList(p_259185_);
        int i;
        String s;
        if (list.size() == 2) {
            s = list.get(1);

            try {
                i = Math.max(Integer.parseInt(list.get(0)), 0);
            } catch (NumberFormatException numberformatexception) {
                LOGGER.error("Error while parsing flat world string", (Throwable)numberformatexception);
                return null;
            }
        } else {
            s = list.get(0);
            i = 1;
        }

        int j = Math.min(p_259723_ + i, DimensionType.Y_SIZE);
        int k = j - p_259723_;

        Optional<Holder.Reference<Block>> optional;
        try {
            optional = p_259695_.get(ResourceKey.create(Registries.BLOCK, ResourceLocation.parse(s)));
        } catch (Exception exception) {
            LOGGER.error("Error while parsing flat world string", (Throwable)exception);
            return null;
        }

        if (optional.isEmpty()) {
            LOGGER.error("Error while parsing flat world string => Unknown block, {}", s);
            return null;
        } else {
            return new FlatLayerInfo(k, optional.get().value());
        }
    }

    private static List<FlatLayerInfo> getLayersInfoFromString(HolderGetter<Block> p_259080_, String p_260301_) {
        List<FlatLayerInfo> list = Lists.newArrayList();
        String[] astring = p_260301_.split(",");
        int i = 0;

        for (String s : astring) {
            FlatLayerInfo flatlayerinfo = getLayerInfoFromString(p_259080_, s, i);
            if (flatlayerinfo == null) {
                return Collections.emptyList();
            }

            list.add(flatlayerinfo);
            i += flatlayerinfo.getHeight();
        }

        return list;
    }

    public static FlatLevelGeneratorSettings fromString(
        HolderGetter<Block> p_259084_,
        HolderGetter<Biome> p_259583_,
        HolderGetter<StructureSet> p_259610_,
        HolderGetter<PlacedFeature> p_259243_,
        String p_259508_,
        FlatLevelGeneratorSettings p_259417_
    ) {
        Iterator<String> iterator = Splitter.on(';').split(p_259508_).iterator();
        if (!iterator.hasNext()) {
            return FlatLevelGeneratorSettings.getDefault(p_259583_, p_259610_, p_259243_);
        } else {
            List<FlatLayerInfo> list = getLayersInfoFromString(p_259084_, iterator.next());
            if (list.isEmpty()) {
                return FlatLevelGeneratorSettings.getDefault(p_259583_, p_259610_, p_259243_);
            } else {
                Holder.Reference<Biome> reference = p_259583_.getOrThrow(DEFAULT_BIOME);
                Holder<Biome> holder = reference;
                if (iterator.hasNext()) {
                    String s = iterator.next();
                    holder = Optional.ofNullable(ResourceLocation.tryParse(s))
                        .map(p_258126_ -> ResourceKey.create(Registries.BIOME, p_258126_))
                        .flatMap(p_259583_::get)
                        .orElseGet(() -> {
                            LOGGER.warn("Invalid biome: {}", s);
                            return reference;
                        });
                }

                return p_259417_.withBiomeAndLayers(list, p_259417_.structureOverrides(), holder);
            }
        }
    }

    static String save(FlatLevelGeneratorSettings p_205394_) {
        StringBuilder stringbuilder = new StringBuilder();

        for (int i = 0; i < p_205394_.getLayersInfo().size(); i++) {
            if (i > 0) {
                stringbuilder.append(",");
            }

            stringbuilder.append(p_205394_.getLayersInfo().get(i));
        }

        stringbuilder.append(";");
        stringbuilder.append(p_205394_.getBiome().unwrapKey().map(ResourceKey::location).orElseThrow(() -> new IllegalStateException("Biome not registered")));
        return stringbuilder.toString();
    }

    @Override
    protected void init() {
        this.shareText = Component.translatable("createWorld.customize.presets.share");
        this.listText = Component.translatable("createWorld.customize.presets.list");
        this.export = new EditBox(this.font, 50, 40, this.width - 100, 20, this.shareText);
        this.export.setMaxLength(1230);
        WorldCreationContext worldcreationcontext = this.parent.parent.getUiState().getSettings();
        RegistryAccess registryaccess = worldcreationcontext.worldgenLoadContext();
        FeatureFlagSet featureflagset = worldcreationcontext.dataConfiguration().enabledFeatures();
        HolderGetter<Biome> holdergetter = registryaccess.lookupOrThrow(Registries.BIOME);
        HolderGetter<StructureSet> holdergetter1 = registryaccess.lookupOrThrow(Registries.STRUCTURE_SET);
        HolderGetter<PlacedFeature> holdergetter2 = registryaccess.lookupOrThrow(Registries.PLACED_FEATURE);
        HolderGetter<Block> holdergetter3 = registryaccess.lookupOrThrow(Registries.BLOCK).filterFeatures(featureflagset);
        this.export.setValue(save(this.parent.settings()));
        this.settings = this.parent.settings();
        this.addWidget(this.export);
        this.list = this.addRenderableWidget(new PresetFlatWorldScreen.PresetsList(registryaccess, featureflagset));
        this.selectButton = this.addRenderableWidget(
            Button.builder(
                    Component.translatable("createWorld.customize.presets.select"),
                    p_280822_ -> {
                        FlatLevelGeneratorSettings flatlevelgeneratorsettings = fromString(
                            holdergetter3, holdergetter, holdergetter1, holdergetter2, this.export.getValue(), this.settings
                        );
                        this.parent.setConfig(flatlevelgeneratorsettings);
                        this.minecraft.setScreen(this.parent);
                    }
                )
                .bounds(this.width / 2 - 155, this.height - 28, 150, 20)
                .build()
        );
        this.addRenderableWidget(
            Button.builder(CommonComponents.GUI_CANCEL, p_280823_ -> this.minecraft.setScreen(this.parent))
                .bounds(this.width / 2 + 5, this.height - 28, 150, 20)
                .build()
        );
        this.updateButtonValidity(this.list.getSelected() != null);
    }

    @Override
    public boolean mouseScrolled(double p_96381_, double p_96382_, double p_96383_, double p_297555_) {
        return this.list.mouseScrolled(p_96381_, p_96382_, p_96383_, p_297555_);
    }

    @Override
    public void resize(Minecraft p_96390_, int p_96391_, int p_96392_) {
        String s = this.export.getValue();
        this.init(p_96390_, p_96391_, p_96392_);
        this.export.setValue(s);
    }

    @Override
    public void onClose() {
        this.minecraft.setScreen(this.parent);
    }

    @Override
    public void render(GuiGraphics p_282713_, int p_281914_, int p_283700_, float p_283598_) {
        super.render(p_282713_, p_281914_, p_283700_, p_283598_);
        p_282713_.pose().pushPose();
        p_282713_.pose().translate(0.0F, 0.0F, 400.0F);
        p_282713_.drawCenteredString(this.font, this.title, this.width / 2, 8, 16777215);
        p_282713_.drawString(this.font, this.shareText, 51, 30, 10526880);
        p_282713_.drawString(this.font, this.listText, 51, 68, 10526880);
        p_282713_.pose().popPose();
        this.export.render(p_282713_, p_281914_, p_283700_, p_283598_);
    }

    public void updateButtonValidity(boolean p_96450_) {
        this.selectButton.active = p_96450_ || this.export.getValue().length() > 1;
    }

    @OnlyIn(Dist.CLIENT)
    class PresetsList extends ObjectSelectionList<PresetFlatWorldScreen.PresetsList.Entry> {
        public PresetsList(final RegistryAccess p_259278_, final FeatureFlagSet p_259076_) {
            super(PresetFlatWorldScreen.this.minecraft, PresetFlatWorldScreen.this.width, PresetFlatWorldScreen.this.height - 117, 80, 24);

            for (Holder<FlatLevelGeneratorPreset> holder : p_259278_.lookupOrThrow(Registries.FLAT_LEVEL_GENERATOR_PRESET).getTagOrEmpty(FlatLevelGeneratorPresetTags.VISIBLE)) {
                Set<Block> set = holder.value()
                    .settings()
                    .getLayersInfo()
                    .stream()
                    .map(p_259579_ -> p_259579_.getBlockState().getBlock())
                    .filter(p_259421_ -> !p_259421_.isEnabled(p_259076_))
                    .collect(Collectors.toSet());
                if (!set.isEmpty()) {
                    PresetFlatWorldScreen.LOGGER
                        .info(
                            "Discarding flat world preset {} since it contains experimental blocks {}",
                            holder.unwrapKey().map(p_259357_ -> p_259357_.location().toString()).orElse("<unknown>"),
                            set
                        );
                } else {
                    this.addEntry(new PresetFlatWorldScreen.PresetsList.Entry(holder));
                }
            }
        }

        public void setSelected(@Nullable PresetFlatWorldScreen.PresetsList.Entry p_96472_) {
            super.setSelected(p_96472_);
            PresetFlatWorldScreen.this.updateButtonValidity(p_96472_ != null);
        }

        @Override
        public boolean keyPressed(int p_96466_, int p_96467_, int p_96468_) {
            if (super.keyPressed(p_96466_, p_96467_, p_96468_)) {
                return true;
            } else {
                if (CommonInputs.selected(p_96466_) && this.getSelected() != null) {
                    this.getSelected().select();
                }

                return false;
            }
        }

        @OnlyIn(Dist.CLIENT)
        public class Entry extends ObjectSelectionList.Entry<PresetFlatWorldScreen.PresetsList.Entry> {
            private static final ResourceLocation STATS_ICON_LOCATION = ResourceLocation.withDefaultNamespace("textures/gui/container/stats_icons.png");
            private final FlatLevelGeneratorPreset preset;
            private final Component name;

            public Entry(final Holder<FlatLevelGeneratorPreset> p_232758_) {
                this.preset = p_232758_.value();
                this.name = p_232758_.unwrapKey()
                    .map(p_232760_ -> (Component)Component.translatable(p_232760_.location().toLanguageKey("flat_world_preset")))
                    .orElse(PresetFlatWorldScreen.UNKNOWN_PRESET);
            }

            @Override
            public void render(
                GuiGraphics p_283649_,
                int p_281641_,
                int p_281959_,
                int p_281428_,
                int p_282594_,
                int p_283493_,
                int p_283234_,
                int p_283185_,
                boolean p_282302_,
                float p_282855_
            ) {
                this.blitSlot(p_283649_, p_281428_, p_281959_, this.preset.displayItem().value());
                p_283649_.drawString(PresetFlatWorldScreen.this.font, this.name, p_281428_ + 18 + 5, p_281959_ + 6, -1);
            }

            @Override
            public boolean mouseClicked(double p_96481_, double p_96482_, int p_96483_) {
                this.select();
                return super.mouseClicked(p_96481_, p_96482_, p_96483_);
            }

            void select() {
                PresetsList.this.setSelected(this);
                PresetFlatWorldScreen.this.settings = this.preset.settings();
                PresetFlatWorldScreen.this.export.setValue(PresetFlatWorldScreen.save(PresetFlatWorldScreen.this.settings));
                PresetFlatWorldScreen.this.export.moveCursorToStart(false);
            }

            private void blitSlot(GuiGraphics p_283196_, int p_282036_, int p_281683_, Item p_282242_) {
                this.blitSlotBg(p_283196_, p_282036_ + 1, p_281683_ + 1);
                p_283196_.renderFakeItem(new ItemStack(p_282242_), p_282036_ + 2, p_281683_ + 2);
            }

            private void blitSlotBg(GuiGraphics p_281359_, int p_282978_, int p_283152_) {
                p_281359_.blitSprite(RenderType::guiTextured, PresetFlatWorldScreen.SLOT_SPRITE, p_282978_, p_283152_, 18, 18);
            }

            @Override
            public Component getNarration() {
                return Component.translatable("narrator.select", this.name);
            }
        }
    }
}