90 lines
3.5 KiB
Java
90 lines
3.5 KiB
Java
/*
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* WorldGuard, a suite of tools for Minecraft
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* Copyright (C) sk89q <http://www.sk89q.com>
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* Copyright (C) WorldGuard team and contributors
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*
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* This program is free software: you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
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* for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package com.sk89q.worldguard.session.handler;
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import com.sk89q.worldedit.util.Location;
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import com.sk89q.worldguard.LocalPlayer;
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import com.sk89q.worldguard.protection.ApplicableRegionSet;
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import com.sk89q.worldguard.protection.flags.Flag;
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import com.sk89q.worldguard.protection.regions.ProtectedRegion;
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import com.sk89q.worldguard.session.MoveType;
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import com.sk89q.worldguard.session.Session;
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import java.util.Set;
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public abstract class FlagValueChangeHandler<T> extends Handler {
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private final Flag<T> flag;
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private T lastValue;
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protected FlagValueChangeHandler(Session session, Flag<T> flag) {
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super(session);
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this.flag = flag;
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}
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@Override
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public final void initialize(LocalPlayer player, Location current, ApplicableRegionSet set) {
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lastValue = set.queryValue(player, flag);
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onInitialValue(player, set, lastValue);
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}
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@Override
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public final void uninitialize(LocalPlayer player, Location current, ApplicableRegionSet set) {
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onClearValue(player, set);
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lastValue = null;
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}
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@Override
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public boolean onCrossBoundary(LocalPlayer player, Location from, Location to, ApplicableRegionSet toSet, Set<ProtectedRegion> entered, Set<ProtectedRegion> exited, MoveType moveType) {
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if (entered.isEmpty() && exited.isEmpty()
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&& from.getExtent().equals(to.getExtent())) { // sets don't include global regions - check if those changed
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return true; // no changes to flags if regions didn't change
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}
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T currentValue = toSet.queryValue(player, flag);
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boolean allowed = true;
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if (currentValue == null && lastValue != null) {
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allowed = onAbsentValue(player, from, to, toSet, lastValue, moveType);
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} else if (currentValue != null && currentValue != lastValue) {
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allowed = onSetValue(player, from, to, toSet, currentValue, lastValue, moveType);
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}
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if (allowed) {
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lastValue = currentValue;
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}
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return allowed;
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}
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protected abstract void onInitialValue(LocalPlayer player, ApplicableRegionSet set, T value);
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protected abstract boolean onSetValue(LocalPlayer player, Location from, Location to, ApplicableRegionSet toSet, T currentValue, T lastValue, MoveType moveType);
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protected abstract boolean onAbsentValue(LocalPlayer player, Location from, Location to, ApplicableRegionSet toSet, T lastValue, MoveType moveType);
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protected void onClearValue(LocalPlayer player, ApplicableRegionSet set) {
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if (lastValue != null) {
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Location current = player.getLocation();
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onAbsentValue(player, current, current, set, lastValue, MoveType.OTHER_NON_CANCELLABLE);
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}
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}
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}
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