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path: root/src/main/kotlin/gui/hud/MoulConfigHud.kt
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package moe.nea.firmament.gui.hud

import io.github.notenoughupdates.moulconfig.gui.GuiComponentWrapper
import io.github.notenoughupdates.moulconfig.gui.GuiContext
import io.github.notenoughupdates.moulconfig.gui.component.TextComponent
import net.minecraft.resource.ResourceManager
import net.minecraft.resource.SynchronousResourceReloader
import moe.nea.firmament.events.FinalizeResourceManagerEvent
import moe.nea.firmament.events.HudRenderEvent
import moe.nea.firmament.gui.config.HudMeta
import moe.nea.firmament.util.MC
import moe.nea.firmament.util.MoulConfigUtils

abstract class MoulConfigHud(
    val name: String,
    val hudMeta: HudMeta,
) {
    companion object {
        private val componentWrapper by lazy {
            object : GuiComponentWrapper(GuiContext(TextComponent("§cERROR"))) {
                init {
                    this.client = MC.instance
                }
            }
        }
    }

    private var fragment: GuiContext? = null

    fun forceInit() {
    }

    open fun shouldRender(): Boolean {
        return true
    }

    init {
        require(name.matches("^[a-z_/]+$".toRegex()))
        HudRenderEvent.subscribe("MoulConfigHud:render") {
            if (!shouldRender()) return@subscribe
            val renderContext = componentWrapper.createContext(it.context)
            if (fragment == null)
                loadFragment()
            it.context.matrices.push()
            hudMeta.applyTransformations(it.context.matrices)
            val renderContextTranslated =
                renderContext.translated(hudMeta.absoluteX, hudMeta.absoluteY, hudMeta.width, hudMeta.height)
                    .scaled(hudMeta.scale)
            fragment!!.root.render(renderContextTranslated)
            it.context.matrices.pop()
        }
        FinalizeResourceManagerEvent.subscribe("MoulConfigHud:finalizeResourceManager") {
            MC.resourceManager.registerReloader(object : SynchronousResourceReloader {
                override fun reload(manager: ResourceManager?) {
                    fragment = null
                }
            })
        }
    }

    fun loadFragment() {
        fragment = MoulConfigUtils.loadGui(name, this)
    }

}