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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
/* eslint-env mozilla/frame-script */
var gErr =
"Abort: firstNonBlankPaint value is not available after loading the page";
var gRetryCounter = 0;
function _contentFNBPaintHandler() {
var x = content.window.performance.timing.timeToNonBlankPaint;
if (typeof x == "undefined") {
sendAsyncMessage("PageLoader:Error", { msg: gErr });
}
if (x > 0) {
dump("received fnbpaint value\n");
sendAsyncMessage("PageLoader:LoadEvent", { time: x, name: "fnbpaint" });
gRetryCounter = 0;
} else {
gRetryCounter += 1;
if (gRetryCounter <= 10) {
dump(
"\nfnbpaint is not yet available (0), retry number " +
gRetryCounter +
"...\n"
);
content.setTimeout(_contentFNBPaintHandler, 100);
} else {
dump(
"\nunable to get a value for fnbpaint after " +
gRetryCounter +
" retries\n"
);
sendAsyncMessage("PageLoader:Error", { msg: gErr });
}
}
}
addEventListener(
"load",
// eslint-disable-next-line no-undef
contentLoadHandlerCallback(_contentFNBPaintHandler),
true
);