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package moe.nea.firmament.features.texturepack
import com.google.gson.JsonObject
import com.google.gson.JsonPrimitive
import moe.nea.firmament.util.ErrorUtil
data class TintOverrides(
val layerMap: Map<Int, TintOverride> = mapOf()
) {
val hasOverrides by lazy { layerMap.values.any { it !is Reset } }
companion object {
val EMPTY = TintOverrides()
private val threadLocal = object : ThreadLocal<TintOverrides>() {}
fun enter(overrides: TintOverrides?) {
ErrorUtil.softCheck("Double entered tintOverrides",
threadLocal.get() == null)
threadLocal.set(overrides ?: EMPTY)
}
fun exit(overrides: TintOverrides?) {
ErrorUtil.softCheck("Exited with non matching enter tintOverrides",
threadLocal.get() == (overrides ?: EMPTY))
threadLocal.remove()
}
fun getCurrentOverrides(): TintOverrides {
return ErrorUtil.notNullOr(threadLocal.get(), "Got current tintOverrides without entering") {
EMPTY
}
}
fun parse(jsonObject: JsonObject): TintOverrides {
val map = mutableMapOf<Int, TintOverride>()
for ((key, value) in jsonObject.entrySet()) {
val layerIndex =
ErrorUtil.notNullOr(key.toIntOrNull(),
"Unknown layer index $value. Should be integer") { continue }
if (value.isJsonNull) {
map[layerIndex] = Reset
continue
}
val override = (value as? JsonPrimitive)
?.takeIf(JsonPrimitive::isNumber)
?.asInt
?.let(TintOverrides::Fixed)
if (override == null) {
ErrorUtil.softError("Invalid tint override for a layer: $value")
continue
}
map[layerIndex] = override
}
return TintOverrides(map)
}
}
fun mergeWithParent(parent: TintOverrides): TintOverrides {
val mergedMap = parent.layerMap.toMutableMap()
mergedMap.putAll(this.layerMap)
return TintOverrides(mergedMap)
}
fun hasOverrides(): Boolean = hasOverrides
fun getOverride(tintIndex: Int): Int? {
return when (val tint = layerMap[tintIndex]) {
is Reset -> null
is Fixed -> tint.color
null -> null
}
}
sealed interface TintOverride
data object Reset : TintOverride
data class Fixed(val color: Int) : TintOverride
}
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