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/* --------------------------------------------------------------------------------------------

* Copyright (c) Microsoft Corporation. All Rights Reserved.

* See 'LICENSE' in the project root for license information.

* ------------------------------------------------------------------------------------------ */

import * as vscode from 'vscode';

export class DataBinding<T> {

private value: T;

private valueChanged = new vscode.EventEmitter<T>();

private isActive: boolean = true;

constructor(value: T) {

this.value = value;

this.isActive = true;

}

public get Value(): T {

return this.value;

}

public set Value(value: T) {

if (value !== this.value) {

this.value = value;

this.valueChanged.fire(this.value);

}

}

public setValueIfActive(value: T): void {

if (value !== this.value) {

this.value = value;

if (this.isActive) {

this.valueChanged.fire(this.value);

}

}

}

public get ValueChanged(): vscode.Event<T> {

return this.valueChanged.event;

}

public activate(): void {

this.isActive = true;

this.valueChanged.fire(this.value);

}

public deactivate(): void {

this.isActive = false;

}

public dispose(): void {

this.deactivate();

this.valueChanged.dispose();

}

}