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<!doctype html>
<title>focus(options) - preventScroll</title>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<style>
#iframe { width: 500px; height: 500px; border: none }
</style>
<iframe id=iframe src="support/preventScroll-helper.html"></iframe>
<script>
function isEntirelyInView(elm, win) {
const inViewHorizontal = (elm.offsetLeft >= win.scrollX) &&
((elm.offsetLeft + elm.clientWidth) <= (win.scrollX + win.innerWidth));
const inViewVertical = (elm.offsetTop >= win.scrollY) &&
((elm.offsetTop + elm.clientHeight) <= (win.scrollY + win.innerHeight));
return inViewHorizontal && inViewVertical;
}
setup({explicit_done: true});
function resetState(win) {
win.scrollTo(0, 0);
win.document.activeElement.blur();
}
onload = () => {
const win = document.getElementById('iframe').contentWindow;
const elm = win.document.getElementById('button');
test(() => {
assert_false(isEntirelyInView(elm, win), 'initial state');
elm.scrollIntoView();
assert_true(isEntirelyInView(elm, win), 'after elm.scrollIntoView()');
resetState(win);
assert_false(isEntirelyInView(elm, win), 'after resetScrollPosition(win)');
}, 'Sanity test');
test(() => {
resetState(win);
elm.focus();
assert_true(isEntirelyInView(elm, win));
}, 'elm.focus() without arguments');
test(() => {
resetState(win);
elm.focus(undefined);
assert_true(isEntirelyInView(elm, win));
}, 'elm.focus(undefined)');
test(() => {
resetState(win);
elm.focus(null);
assert_true(isEntirelyInView(elm, win));
}, 'elm.focus(null)');
test(() => {
resetState(win);
elm.focus({});
assert_true(isEntirelyInView(elm, win));
}, 'elm.focus({})');
test(() => {
resetState(win);
elm.focus({preventScroll: false});
assert_true(isEntirelyInView(elm, win));
}, 'elm.focus({preventScroll: false})');
test(() => {
resetState(win);
elm.focus({preventScroll: true});
assert_equals(win.scrollX, 0);
assert_equals(win.scrollY, 0);
}, 'elm.focus({preventScroll: true})');
done();
}
</script>
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