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a6471c4276
* Rename Blockly.utils.IdGenerator -> idGenerator * Move genUid from Blockly.utils to Blockly.utils.idGenerator
83 lines
2.0 KiB
JavaScript
83 lines
2.0 KiB
JavaScript
/**
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* @license
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* Copyright 2019 Google LLC
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @fileoverview Generators for unique IDs.
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* @author samelh@google.com (Sam El-Husseini)
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*/
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'use strict';
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/**
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* @name Blockly.utils.idGenerator
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* @namespace
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*/
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goog.module('Blockly.utils.idGenerator');
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goog.module.declareLegacyNamespace();
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/**
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* Namespace object for internal implementations we want to be able to
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* stub in tests.
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*/
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const internal = {};
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exports.TEST_ONLY = internal;
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/**
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* Next unique ID to use.
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* @type {number}
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*/
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let nextId = 0;
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/**
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* Generate the next unique element IDs.
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* IDs are compatible with the HTML4 id attribute restrictions:
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* Use only ASCII letters, digits, '_', '-' and '.'
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*
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* For UUIDs use genUid (below) instead; this ID generator should
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* primarily be used for IDs that end up in the DOM.
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*
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* @return {string} The next unique identifier.
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*/
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const getNextUniqueId = function() {
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return 'blockly-' + (nextId++).toString(36);
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};
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exports.getNextUniqueId = getNextUniqueId;
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/**
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* Legal characters for the universally unique IDs. Should be all on
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* a US keyboard. No characters that conflict with XML or JSON.
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* Requests to remove additional 'problematic' characters from this
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* soup will be denied. That's your failure to properly escape in
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* your own environment. Issues #251, #625, #682, #1304.
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*/
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const soup = '!#$%()*+,-./:;=?@[]^_`{|}~' +
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'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
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/**
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* Generate a random unique ID. This should be globally unique.
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* 87 characters ^ 20 length > 128 bits (better than a UUID).
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* @return {string} A globally unique ID string.
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*/
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internal.genUid = function() {
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const length = 20;
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const soupLength = soup.length;
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const id = [];
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for (let i = 0; i < length; i++) {
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id[i] = soup.charAt(Math.random() * soupLength);
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}
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return id.join('');
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};
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/**
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* Generate a random unique ID.
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* @see internal.genUid
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* @return {string} A globally unique ID string.
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*/
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const genUid = function() {
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return internal.genUid();
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};
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exports.genUid = genUid;
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