DarkMode: move to shared preferences listener
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
This commit is contained in:
@@ -1,109 +0,0 @@
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/*
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* Copyright © 2017 John Wu <topjohnwu@gmail.com>
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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package com.wireguard.android.util;
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import java.lang.ref.WeakReference;
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import java.util.Iterator;
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import java.util.LinkedList;
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import java.util.List;
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import java.lang.ref.WeakReference;
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import java.util.ArrayList;
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import java.util.List;
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public class Topic {
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private static final int NON_INIT = 0;
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private static final int PENDING = 1;
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private static final int PUBLISHED = 2;
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private int state = NON_INIT;
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private List<WeakReference<Subscriber>> subscribers;
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private Object[] results;
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public Topic() {
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subscribers = new SyncArrayList<>();
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}
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public synchronized void subscribe(final Subscriber sub) {
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subscribers.add(new WeakReference<>(sub));
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}
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public synchronized void unsubscribe() {
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subscribers = new SyncArrayList<>();
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}
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public synchronized void unsubscribe(final Subscriber sub) {
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List<WeakReference<Subscriber>> subs = subscribers;
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subscribers = new ArrayList<>();
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for (final WeakReference<Subscriber> subscriber : subs) {
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if (subscriber.get() != null && subscriber.get() != sub)
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subscribers.add(subscriber);
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}
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}
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public void reset() {
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state = NON_INIT;
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results = null;
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}
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public boolean isPublished() {
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return state == PUBLISHED;
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}
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public void publish() {
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publish(true);
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}
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public void publish(boolean record, Object... results) {
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if (record)
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state = PUBLISHED;
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this.results = results;
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// Snapshot
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List<WeakReference<Subscriber>> subs = subscribers;
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for (final WeakReference<Subscriber> subscriber : subs) {
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if (subscriber != null && subscriber.get() != null)
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subscriber.get().onTopicPublished(this);
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}
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}
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public Object[] getResults() {
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return results;
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}
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public boolean isPending() {
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return state == PENDING;
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}
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public void setPending() {
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state = PENDING;
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}
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public interface Subscriber {
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default void subscribeTopics() {
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for (final Topic topic : getSubscription()) {
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if (topic.isPublished()) {
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onTopicPublished(topic);
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}
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topic.subscribe(this);
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}
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}
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default void unsubscribeTopics() {
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for (final Topic event : getSubscription()) {
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event.unsubscribe(this);
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}
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}
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void onTopicPublished(Topic topic);
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Topic[] getSubscription();
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}
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private static class SyncArrayList<E> extends ArrayList<E> {
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@Override
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public synchronized boolean add(final E e) {
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return super.add(e);
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}
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}
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}
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