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<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
</head>
<body>
<iframe src="about:blank"></iframe>
</body>
<script>
'use strict';
promise_test(async (t) => {
t.add_cleanup(async () => {
await test_driver.clear_display_features();
});
// When the viewport is not divided the segments property should return an
// array with one segment, the size of the viewport.
assert_equals(viewport.segments.length, 1);
let segment = viewport.segments[0];
assert_equals(segment.x, 0);
assert_equals(segment.y, 0);
assert_equals(segment.width, window.innerWidth);
assert_equals(segment.height, window.innerHeight);
// iframes do not receive segments information.
assert_equals(window.frames[0].viewport.segments, null);
const displayFeatureLength = 10;
const horizontalViewportSegmentsMQL = window.matchMedia('(horizontal-viewport-segments: 2)');
let promise = new Promise(resolve => {
horizontalViewportSegmentsMQL.addEventListener(
'change',
() => { resolve(horizontalViewportSegmentsMQL.matches); },
{ once: true }
);
});
const leftOffset =
Math.round(window.innerWidth / 2 - displayFeatureLength / 2);
await test_driver.set_display_features([{
orientation: 'vertical',
maskLength: displayFeatureLength,
offset: leftOffset
}]);
assert_true(await promise);
assert_equals(viewport.segments.length, 2);
const segmentLeft = viewport.segments[0];
const epsilon = 1;
assert_equals(segmentLeft.x, 0);
assert_equals(segmentLeft.y, 0);
assert_approx_equals(segmentLeft.width, leftOffset, epsilon);
assert_equals(segmentLeft.height, window.innerHeight);
const segmentRight = viewport.segments[1];
assert_approx_equals(segmentRight.x,
Math.round(window.innerWidth / 2 + displayFeatureLength / 2), epsilon);
assert_equals(segmentRight.y, 0);
assert_approx_equals(segmentRight.width, leftOffset, epsilon);
assert_equals(segmentRight.height, window.innerHeight);
// iframes do not receive segments information.
assert_equals(window.frames[0].viewport.segments, null);
const verticalViewportSegmentsMQL = window.matchMedia('(vertical-viewport-segments: 2)');
promise = new Promise(resolve => {
verticalViewportSegmentsMQL.addEventListener(
'change',
() => { resolve(verticalViewportSegmentsMQL.matches); },
{ once: true }
);
});
const topOffset =
Math.round(window.innerHeight / 2 - displayFeatureLength / 2);
await test_driver.set_display_features([{
orientation: 'horizontal',
maskLength: displayFeatureLength,
offset: topOffset
}]);
assert_true(await promise);
assert_equals(viewport.segments.length, 2);
const segmentTop = viewport.segments[0];
assert_equals(segmentTop.x, 0);
assert_equals(segmentTop.y, 0);
assert_equals(segmentTop.width, window.innerWidth);
assert_approx_equals(segmentTop.height, topOffset, epsilon);
const segmentBottom = viewport.segments[1];
assert_equals(segmentBottom.x, 0);
assert_approx_equals(segmentBottom.y,
Math.round(window.innerHeight / 2 + displayFeatureLength / 2), epsilon);
assert_equals(segmentBottom.width, window.innerWidth);
assert_approx_equals(segmentBottom.height, topOffset, epsilon);
// iframes do not receive segments information.
assert_equals(window.frames[0].viewport.segments, null);
const oneSegmentMQL = window.matchMedia('(vertical-viewport-segments: 1)');
promise = new Promise(resolve => {
oneSegmentMQL.addEventListener(
'change',
() => { resolve(oneSegmentMQL.matches); },
{ once: true }
);
});
await test_driver.clear_display_features();
assert_true(await promise);
segment = viewport.segments[0];
assert_equals(segment.x, 0);
assert_equals(segment.y, 0);
assert_equals(segment.width, window.innerWidth);
assert_equals(segment.height, window.innerHeight);
// iframes do not receive segments information.
assert_equals(window.frames[0].viewport.segments, null);
}, 'Tests the Viewport Segments Media Query change event handler.');
</script>
</html>
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