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"use strict";
{
let handlers = new Set();
let dispatch = async (msg, sender) => {
let {__meta, _messageName} = msg;
if (!__meta) {
// legacy message from embedder?
if (!_messageName) {
debug(`Message not in NoScript-specific format: %s`, JSON.stringify(msg));
return undefined;
}
__meta = {name: _messageName};
}
let {name} = __meta;
let answers = [];
for (let h of handlers) {
let f = h[name];
if (typeof f === "function") {
answers.push(f(msg, sender));
}
}
if (answers.length) {
return await (
answers.length === 1 ? answers.pop(): Promise.all(answers)
);
}
debug("Warning: no handler for message %s %s in context %s", name, JSON.stringify(msg), document.URL);
};
var Messages = {
addHandler(handler) {
let originalSize = handlers.size;
handlers.add(handler);
if (originalSize === 0 && handlers.size === 1) {
browser.runtime.onMessage.addListener(dispatch);
}
},
removeHandler(handler) {
let originalSize = handlers.size;
handlers.delete(handler);
if (originalSize === 1 && handlers.size === 0) {
browser.runtime.onMessage.removeListener(dispatch);
}
},
async send(name, args = {}, recipientInfo = null) {
args.__meta = {name, recipientInfo};
args._messageName = name; // legacy protocol, for embedders
if (recipientInfo && "tabId" in recipientInfo) {
let opts;
if ("frameId" in recipientInfo) opts = {frameId: recipientInfo.frameId};
return await browser.tabs.sendMessage(recipientInfo.tabId, args, opts);
}
return await browser.runtime.sendMessage(args);
}
}
}
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