jupyterlab-emrys/lib/notebook/common/metadata.js

A computational environment for Jupyter. Powered by Emrys

// Copyright (c) Jupyter Development Team.
// Distributed under the terms of the Modified BSD License.
"use strict";
/**
 * An implementation of a metadata cursor.
 */
var MetadataCursor = (function () {
    /**
     * Construct a new metadata cursor.
     *
     * @param name - The metadata namespace key.
     *
     * @param read - The read callback.
     *
     * @param write - The write callback.
     */
    function MetadataCursor(name, read, write) {
        this._name = '';
        this._read = null;
        this._write = null;
        this._name = name;
        this._read = read;
        this._write = write;
    }
    Object.defineProperty(MetadataCursor.prototype, "name", {
        /**
         * Get the namespace key of the metadata.
         *
         * #### Notes
         * This is a read-only property.
         */
        get: function () {
            return this._name;
        },
        enumerable: true,
        configurable: true
    });
    /**
     * Dispose of the resources used by the cursor.
     *
     * #### Notes
     * This is not meant to be called by user code.
     */
    MetadataCursor.prototype.dispose = function () {
        this._read = null;
        this._write = null;
    };
    /**
     * Get the value of the namespace data.
     */
    MetadataCursor.prototype.getValue = function () {
        var read = this._read;
        return read();
    };
    /**
     * Set the value of the namespace data.
     */
    MetadataCursor.prototype.setValue = function (value) {
        var write = this._write;
        write(value);
    };
    return MetadataCursor;
}());
exports.MetadataCursor = MetadataCursor;