зеркало из https://github.com/mozilla/gecko-dev.git
85 строки
1.8 KiB
JavaScript
85 строки
1.8 KiB
JavaScript
/* 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";
|
|
|
|
var EXPORTED_SYMBOLS = ["GlobalState"];
|
|
|
|
const EXPORTED_METHODS = ["getState", "clear", "get", "set", "delete", "setFromState"];
|
|
/**
|
|
* Module that contains global session data.
|
|
*/
|
|
function GlobalState() {
|
|
let internal = new GlobalStateInternal();
|
|
let external = {};
|
|
for (let method of EXPORTED_METHODS) {
|
|
external[method] = internal[method].bind(internal);
|
|
}
|
|
return Object.freeze(external);
|
|
}
|
|
|
|
function GlobalStateInternal() {
|
|
// Storage for global state.
|
|
this.state = {};
|
|
}
|
|
|
|
GlobalStateInternal.prototype = {
|
|
/**
|
|
* Get all value from the global state.
|
|
*/
|
|
getState() {
|
|
return this.state;
|
|
},
|
|
|
|
/**
|
|
* Clear all currently stored global state.
|
|
*/
|
|
clear() {
|
|
this.state = {};
|
|
},
|
|
|
|
/**
|
|
* Retrieve a value from the global state.
|
|
*
|
|
* @param aKey
|
|
* A key the value is stored under.
|
|
* @return The value stored at aKey, or an empty string if no value is set.
|
|
*/
|
|
get(aKey) {
|
|
return this.state[aKey] || "";
|
|
},
|
|
|
|
/**
|
|
* Set a global value.
|
|
*
|
|
* @param aKey
|
|
* A key to store the value under.
|
|
*/
|
|
set(aKey, aStringValue) {
|
|
this.state[aKey] = aStringValue;
|
|
},
|
|
|
|
/**
|
|
* Delete a global value.
|
|
*
|
|
* @param aKey
|
|
* A key to delete the value for.
|
|
*/
|
|
delete(aKey) {
|
|
delete this.state[aKey];
|
|
},
|
|
|
|
/**
|
|
* Set the current global state from a state object. Any previous global
|
|
* state will be removed, even if the new state does not contain a matching
|
|
* key.
|
|
*
|
|
* @param aState
|
|
* A state object to extract global state from to be set.
|
|
*/
|
|
setFromState(aState) {
|
|
this.state = (aState && aState.global) || {};
|
|
},
|
|
};
|