62 lines
1.5 KiB
JavaScript
62 lines
1.5 KiB
JavaScript
import { microSeconds as micro, isNode } from '../util';
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export var microSeconds = micro;
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export var type = 'native';
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export function create(channelName) {
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var state = {
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messagesCallback: null,
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bc: new BroadcastChannel(channelName),
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subFns: [] // subscriberFunctions
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};
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state.bc.onmessage = function (msg) {
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if (state.messagesCallback) {
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state.messagesCallback(msg.data);
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}
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};
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return state;
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}
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export function close(channelState) {
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channelState.bc.close();
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channelState.subFns = [];
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}
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export function postMessage(channelState, messageJson) {
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try {
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channelState.bc.postMessage(messageJson, false);
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return Promise.resolve();
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} catch (err) {
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return Promise.reject(err);
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}
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}
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export function onMessage(channelState, fn) {
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channelState.messagesCallback = fn;
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}
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export function canBeUsed() {
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/**
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* in the electron-renderer, isNode will be true even if we are in browser-context
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* so we also check if window is undefined
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*/
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if (isNode && typeof window === 'undefined') return false;
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if (typeof BroadcastChannel === 'function') {
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if (BroadcastChannel._pubkey) {
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throw new Error('BroadcastChannel: Do not overwrite window.BroadcastChannel with this module, this is not a polyfill');
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}
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return true;
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} else return false;
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}
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export function averageResponseTime() {
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return 150;
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}
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export default {
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create: create,
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close: close,
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onMessage: onMessage,
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postMessage: postMessage,
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canBeUsed: canBeUsed,
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type: type,
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averageResponseTime: averageResponseTime,
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microSeconds: microSeconds
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}; |