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