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(function() {
var accumulatedRect = null;
var onpaint = new Array();
var debug = false;
const FlushModes = {
FLUSH: 0,
NOFLUSH: 1
};
function paintListener(event) {
if (event.target != window)
return;
var eventRect =
[ event.boundingClientRect.left,
event.boundingClientRect.top,
event.boundingClientRect.right,
event.boundingClientRect.bottom ];
if (debug) {
dump("got MozAfterPaint: " + eventRect.join(",") + "\n");
}
accumulatedRect = accumulatedRect
? [ Math.min(accumulatedRect[0], eventRect[0]),
Math.min(accumulatedRect[1], eventRect[1]),
Math.max(accumulatedRect[2], eventRect[2]),
Math.max(accumulatedRect[3], eventRect[3]) ]
: eventRect;
while (onpaint.length > 0) {
window.setTimeout(onpaint.pop(), 0);
}
}
window.addEventListener("MozAfterPaint", paintListener, false);
function waitForPaints(callback, subdoc, flushMode) {
// Wait until paint suppression has ended
var utils = SpecialPowers.getDOMWindowUtils(window);
if (utils.paintingSuppressed) {
if (debug) {
dump("waiting for paint suppression to end...\n");
}
window.setTimeout(function() {
waitForPaints(callback, subdoc, flushMode);
}, 0);
return;
}
// The call to getBoundingClientRect will flush pending layout
// notifications. Sometimes, however, this is undesirable since it can mask
// bugs where the code under test should be performing the flush.
if (flushMode === FlushModes.FLUSH) {
document.documentElement.getBoundingClientRect();
if (subdoc) {
subdoc.documentElement.getBoundingClientRect();
}
}
if (utils.isMozAfterPaintPending) {
if (debug) {
dump("waiting for paint...\n");
}
onpaint.push(
function() { waitForPaints(callback, subdoc, FlushModes.NOFLUSH); });
if (utils.isTestControllingRefreshes) {
utils.advanceTimeAndRefresh(0);
}
return;
}
if (debug) {
dump("done...\n");
}
var result = accumulatedRect || [ 0, 0, 0, 0 ];
accumulatedRect = null;
callback.apply(null, result);
}
window.waitForAllPaintsFlushed = function(callback, subdoc) {
waitForPaints(callback, subdoc, FlushModes.FLUSH);
};
window.waitForAllPaints = function(callback) {
waitForPaints(callback, null, FlushModes.NOFLUSH);
};
})();
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