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function pushPrefs(...aPrefs) {
return SpecialPowers.pushPrefEnv({ set: aPrefs });
}
function promiseWaitForEvent(
object,
eventName,
capturing = false,
chrome = false
) {
return new Promise(resolve => {
function listener(event) {
info("Saw " + eventName);
object.removeEventListener(eventName, listener, capturing, chrome);
resolve(event);
}
info("Waiting for " + eventName);
object.addEventListener(eventName, listener, capturing, chrome);
});
}
/**
* Waits for the next load to complete in any browser or the given browser.
* If a <tabbrowser> is given it waits for a load in any of its browsers.
*
* @return promise
*/
function waitForDocLoadComplete(aBrowser = gBrowser) {
return new Promise(resolve => {
let listener = {
onStateChange(webProgress, req, flags, status) {
let docStop =
Ci.nsIWebProgressListener.STATE_IS_NETWORK |
Ci.nsIWebProgressListener.STATE_STOP;
info(
"Saw state " +
flags.toString(16) +
" and status " +
status.toString(16)
);
// When a load needs to be retargetted to a new process it is cancelled
// with NS_BINDING_ABORTED so ignore that case
if ((flags & docStop) == docStop && status != Cr.NS_BINDING_ABORTED) {
aBrowser.removeProgressListener(this);
waitForDocLoadComplete.listeners.delete(this);
let chan = req.QueryInterface(Ci.nsIChannel);
info("Browser loaded " + chan.originalURI.spec);
resolve();
}
},
QueryInterface: ChromeUtils.generateQI([
"nsIWebProgressListener",
"nsISupportsWeakReference",
]),
};
aBrowser.addProgressListener(listener);
waitForDocLoadComplete.listeners.add(listener);
info("Waiting for browser load");
});
}
// Keep a set of progress listeners for waitForDocLoadComplete() to make sure
// they're not GC'ed before we saw the page load.
waitForDocLoadComplete.listeners = new Set();
registerCleanupFunction(() => waitForDocLoadComplete.listeners.clear());