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/* Any copyright is dedicated to the Public Domain.
http://creativecommons.org/publicdomain/zero/1.0/ */
function fuzzyEquals(a, b) {
return (Math.abs(a - b) < 1e-6);
}
function promiseBrowserEvent(browser, eventType) {
return new Promise((resolve) => {
function handle(event) {
// Since we'll be redirecting, don't make assumptions about the given URL and the loaded URL
if (event.target != browser.contentDocument || event.target.location.href == "about:blank") {
info("Skipping spurious '" + eventType + "' event" + " for " + event.target.location.href);
return;
}
info("Received event " + eventType + " from browser");
browser.removeEventListener(eventType, handle, true);
resolve(event);
}
browser.addEventListener(eventType, handle, true);
info("Now waiting for " + eventType + " event from browser");
});
}
function promiseTabEvent(container, eventType) {
return new Promise((resolve) => {
function handle(event) {
info("Received event " + eventType + " from container");
container.removeEventListener(eventType, handle, true);
resolve(event);
}
container.addEventListener(eventType, handle, true);
info("Now waiting for " + eventType + " event from container");
});
}
function promiseNotification(topic) {
Cu.import("resource://gre/modules/Services.jsm");
return new Promise((resolve, reject) => {
function observe(subject, topic, data) {
info("Received " + topic + " notification from Gecko");
Services.obs.removeObserver(observe, topic);
resolve();
}
Services.obs.addObserver(observe, topic, false);
info("Now waiting for " + topic + " notification from Gecko");
});
}
function promiseLinkVisit(url) {
Cu.import("resource://gre/modules/Services.jsm");
var topic = "link-visited";
return new Promise((resolve, reject) => {
function observe(subject, topic, data) {
info("Received " + topic + " notification from Gecko");
var uri = subject.QueryInterface(Ci.nsIURI);
if (uri.spec != url) {
info("Visited URL " + uri.spec + " is not desired URL " + url + "; ignoring.");
return;
}
info("Visited URL " + uri.spec + " is desired URL " + url);
Services.obs.removeObserver(observe, topic);
resolve();
};
Services.obs.addObserver(observe, topic, false);
info("Now waiting for " + topic + " notification from Gecko with URL " + url);
});
}
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