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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,6 +1,6 @@ | ||
| distributionBase=GRADLE_USER_HOME | ||
| distributionPath=wrapper/dists | ||
| distributionUrl=https\://services.gradle.org/distributions/gradle-7.3-bin.zip | ||
| distributionSha256Sum=de8f52ad49bdc759164f72439a3bf56ddb1589c4cde802d3cec7d6ad0e0ee410 | ||
| distributionUrl=https\://services.gradle.org/distributions/gradle-7.6-bin.zip | ||
| distributionSha256Sum=7ba68c54029790ab444b39d7e293d3236b2632631fb5f2e012bb28b4ff669e4b | ||
| zipStoreBase=GRADLE_USER_HOME | ||
| zipStorePath=wrapper/dists |
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67 changes: 67 additions & 0 deletions
67
modules/javafx.base/src/main/java/com/sun/javafx/binding/ConditionalBinding.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| package com.sun.javafx.binding; | ||
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| import java.util.Objects; | ||
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| import javafx.beans.value.ObservableValue; | ||
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| public class ConditionalBinding<T> extends LazyObjectBinding<T> { | ||
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| private final ObservableValue<T> source; | ||
| private final ObservableValue<Boolean> nonNullCondition; | ||
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| private Subscription subscription; | ||
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| public ConditionalBinding(ObservableValue<T> source, ObservableValue<Boolean> condition) { | ||
| this.source = Objects.requireNonNull(source, "source cannot be null"); | ||
| this.nonNullCondition = Objects.requireNonNull(condition, "condition cannot be null").orElse(false); | ||
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| // condition is always observed and never unsubscribed | ||
| Subscription.subscribe(nonNullCondition, current -> { | ||
| invalidate(); | ||
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| if (!current) { | ||
| getValue(); | ||
| } | ||
| }); | ||
| } | ||
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| /** | ||
| * This binding is valid whenever it is observed, or it is currently inactive. | ||
| * When inactive, the binding has the value of its source at the time it became | ||
| * inactive. | ||
| */ | ||
| @Override | ||
| protected boolean allowValidation() { | ||
| return super.allowValidation() || !isActive(); | ||
| } | ||
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| @Override | ||
| protected T computeValue() { | ||
| if (isObserved() && isActive()) { | ||
| if (subscription == null) { | ||
| subscription = Subscription.subscribeInvalidations(source, this::invalidate); | ||
| } | ||
| } | ||
| else { | ||
| unsubscribe(); | ||
| } | ||
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| return source.getValue(); | ||
| } | ||
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| @Override | ||
| protected Subscription observeSources() { | ||
| return this::unsubscribe; | ||
| } | ||
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| private boolean isActive() { | ||
| return nonNullCondition.getValue(); | ||
| } | ||
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| private void unsubscribe() { | ||
| if (subscription != null) { | ||
| subscription.unsubscribe(); | ||
| subscription = null; | ||
| } | ||
| } | ||
| } |
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