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