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/*
* Copyright (c) 2018, 2019, 2020 shedaniel
* Licensed under the MIT License (the "License").
*/
package me.shedaniel.rei.impl;
import com.google.common.collect.Lists;
import com.google.common.collect.Maps;
import me.shedaniel.math.api.Rectangle;
import me.shedaniel.rei.api.BaseBoundsHandler;
import me.shedaniel.rei.api.DisplayHelper;
import org.jetbrains.annotations.ApiStatus;
import java.util.Comparator;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
@ApiStatus.Internal
public class DisplayHelperImpl implements DisplayHelper {
private static final Comparator<DisplayBoundsHandler<?>> BOUNDS_HANDLER_COMPARATOR;
private static final DisplayBoundsHandler<Object> EMPTY = new DisplayBoundsHandler<Object>() {
@Override
public Class<Object> getBaseSupportedClass() {
return null;
}
@Override
public Rectangle getLeftBounds(Object screen) {
return new Rectangle();
}
@Override
public Rectangle getRightBounds(Object screen) {
return new Rectangle();
}
@Override
public float getPriority() {
return -10f;
}
};
static {
Comparator<DisplayBoundsHandler<?>> comparator = Comparator.comparingDouble(DisplayBoundsHandler::getPriority);
BOUNDS_HANDLER_COMPARATOR = comparator.reversed();
}
private List<DisplayBoundsHandler<?>> screenDisplayBoundsHandlers = Lists.newArrayList();
private Map<Class<?>, DisplayBoundsHandler<?>> handlerCache = Maps.newHashMap();
private Map<Class<?>, List<DisplayBoundsHandler<?>>> handlerSortedCache = Maps.newHashMap();
private BaseBoundsHandler baseBoundsHandler;
private Class<?> tempScreen;
@Override
public List<DisplayBoundsHandler<?>> getSortedBoundsHandlers(Class<?> screenClass) {
List<DisplayBoundsHandler<?>> possibleCached = handlerSortedCache.get(screenClass);
if (possibleCached != null)
return possibleCached;
tempScreen = screenClass;
handlerSortedCache.put(screenClass, screenDisplayBoundsHandlers.stream().filter(this::filterResponsible).sorted(BOUNDS_HANDLER_COMPARATOR).collect(Collectors.toList()));
return handlerSortedCache.get(screenClass);
}
@Override
public List<DisplayBoundsHandler<?>> getAllBoundsHandlers() {
return screenDisplayBoundsHandlers;
}
@Override
public DisplayBoundsHandler<?> getResponsibleBoundsHandler(Class<?> screenClass) {
DisplayBoundsHandler<?> possibleCached = handlerCache.get(screenClass);
if (possibleCached != null)
return possibleCached;
List<DisplayBoundsHandler<?>> handlers = getSortedBoundsHandlers(screenClass);
handlerCache.put(screenClass, handlers.isEmpty() ? EMPTY : handlers.get(0));
return handlerCache.get(screenClass);
}
private boolean filterResponsible(DisplayBoundsHandler<?> handler) {
return handler.getBaseSupportedClass().isAssignableFrom(tempScreen);
}
@Override
public void registerBoundsHandler(DisplayBoundsHandler<?> handler) {
screenDisplayBoundsHandlers.add(handler);
}
@Override
public BaseBoundsHandler getBaseBoundsHandler() {
return baseBoundsHandler;
}
@ApiStatus.Internal
public void setBaseBoundsHandler(BaseBoundsHandler baseBoundsHandler) {
this.baseBoundsHandler = baseBoundsHandler;
}
@ApiStatus.Internal
public void resetData() {
screenDisplayBoundsHandlers.clear();
}
@ApiStatus.Internal
public void resetCache() {
handlerCache.clear();
handlerSortedCache.clear();
}
}
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