104 lines
2.5 KiB
JavaScript
104 lines
2.5 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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"use strict";
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const SOURCE_TOKEN = "<:>";
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function LocationStore (store) {
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this._store = store || new Map();
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}
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/**
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* Method to get a promised location from the Store.
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* @param location
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* @returns Promise<Object>
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*/
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LocationStore.prototype.get = function (location) {
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this._safeAccessInit(location.url);
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return this._store.get(location.url).get(location);
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};
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/**
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* Method to set a promised location to the Store
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* @param location
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* @param promisedLocation
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*/
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LocationStore.prototype.set = function (location, promisedLocation = null) {
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this._safeAccessInit(location.url);
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this._store.get(location.url).set(serialize(location), promisedLocation);
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};
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/**
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* Utility method to verify if key exists in Store before accessing it.
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* If not, initializing it.
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* @param url
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* @private
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*/
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LocationStore.prototype._safeAccessInit = function (url) {
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if (!this._store.has(url)) {
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this._store.set(url, new Map());
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}
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};
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/**
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* Utility proxy method to Map.clear() method
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*/
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LocationStore.prototype.clear = function () {
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this._store.clear();
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};
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/**
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* Retrieves an object containing all locations to be resolved when `source-updated`
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* event is triggered.
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* @param url
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* @returns {Array<String>}
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*/
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LocationStore.prototype.getByURL = function (url){
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if (this._store.has(url)) {
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return [...this._store.get(url).keys()];
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}
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return [];
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};
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/**
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* Invalidates the stale location promises from the store when `source-updated`
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* event is triggered, and when FrameView unsubscribes from a location.
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* @param url
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*/
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LocationStore.prototype.clearByURL = function (url) {
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this._safeAccessInit(url);
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this._store.set(url, new Map());
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};
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exports.LocationStore = LocationStore;
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exports.serialize = serialize;
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exports.deserialize = deserialize;
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/**
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* Utility method to serialize the source
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* @param source
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* @returns {string}
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*/
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function serialize(source) {
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let { url, line, column } = source;
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line = line || 0;
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column = column || 0;
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return `${url}${SOURCE_TOKEN}${line}${SOURCE_TOKEN}${column}`;
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};
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/**
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* Utility method to serialize the source
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* @param source
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* @returns Object
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*/
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function deserialize(source) {
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let [ url, line, column ] = source.split(SOURCE_TOKEN);
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line = parseInt(line);
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column = parseInt(column);
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if (column === 0) {
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return { url, line };
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}
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return { url, line, column };
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};
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