blob: df61872f73225f4267962f32836c92f12eaaaeeb [file] [log] [blame]
<!DOCTYPE html>
.overflow-hidden {
width: 100px;
height: 100px;
background: #000;
overflow: hidden;
input {
font-size: 10px;
height: 20px;
button {
position: relative;
left: 100px;
top: 100px;
function runTest() {
if (!window.testRunner)
if (!window.eventSender)
var input = document.getElementById("input");
var x = input.offsetLeft + input.offsetWidth / 2;
var y = input.offsetTop + input.offsetHeight / 2;
eventSender.dragMode = false;
eventSender.mouseMoveTo(x, y);
// We do the dragging/selection in two steps here, because if we move
// the mouse beyond the input boundary right way, it won't start the autoscroll
// timer. See early return in AutoscrollController::startAutoscrollForSelection
// after calling LayoutBox::findAutoscrollable.
eventSender.mouseMoveTo(x + 48, y);
eventSender.mouseMoveTo(x + 55, y);
setTimeout(finishTest, 100);
function finishTest()
var div = document.getElementById("div");
if (div.scrollTop == 0 && div.scrollLeft == 0)
document.getElementById("result").innerText = "Test succeeded!";
document.getElementById("result").innerText = "Test failed!";
<body onload="runTest()">
<p>Test ensures that if an autoscroll starts from within an entry field, it does not propagate
to its non-scrollable overflow ancestors.</p>
<p>To test manually, start text selecting with a mouse the text within the entry field. Then
continue to drag the mouse out of the input field boundary.<br>Scrolling should not propagate to
the container overflown div due to its "overflow:hidden"</p>
<div id="div" class="overflow-hidden">
<input id="input" type="text" value="any text here!"/>
<p id="result">If the test has completed this sentence should be replaced by a success message.</p>