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<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=2100"/>
<title>Check that double tapping internal calculations correctly convert the tap point</title>
<script type="application/javascript" src="apz_test_native_event_utils.js"></script>
<script type="application/javascript" src="apz_test_utils.js"></script>
<script src="/tests/SimpleTest/paint_listener.js"></script>
<script type="application/javascript">
async function test() {
let useTouchpad = (location.search == "?touchpad");
const deviceScale = window.devicePixelRatio;
let target2 = document.getElementById("target2")
info("deviceScale " + deviceScale);
info("window.innerwh " + window.innerWidth + " " + window.innerHeight);
info("vv " + visualViewport.offsetLeft + " " + visualViewport.offsetTop + " " + visualViewport.width + " " + visualViewport.height);
let resolution = await getResolution();
let vvHeightAtUnitZoom = visualViewport.height * resolution;
// The max amount of zoom is 10 (as defined in dom/base/nsViewportInfo.h),
// but that includes the deviceScale (bug 1700865 is filed about this), so
// this is the max amount of zoom that double tap can increase by.
let maxPinchZoom = 10/deviceScale;
// Compute the visual viewport size at that max zoom.
let minVVHeight = vvHeightAtUnitZoom / maxPinchZoom;
// Make the element height to just fit inside the minimum visual viewport
// height, minus the margins that get added for the zoom target rect (15 on
// each side) and a little wiggle room just in case (rounding, etc).
let elementHeight = Math.floor(minVVHeight) - 2*15 - 4;
ok(elementHeight > 10, "tall enough element");
// And then make the element skinnier than the window size so it triggers
// the bug. (half the aspect ratio minus 5 just to be sure)
let elementWidth = Math.max(12, Math.floor(elementHeight * window.innerWidth / (2 * window.innerHeight)) - 5);
info("element size " + elementWidth + " " + elementHeight);
target2.style.width = elementWidth + "px";
target2.style.height = elementHeight + "px";
await promiseApzFlushedRepaints();
resolution = await getResolution();
ok(resolution > 0,
"The initial_resolution is " + resolution + ", which is some sane value");
// Check that double-tapping once zooms in
await doubleTapOn(document.getElementById("target1"), 10, 10, useTouchpad);
var prev_resolution = resolution;
resolution = await getResolution();
ok(resolution > prev_resolution, "The first double-tap has increased the resolution to " + resolution);
// Check that double-tapping the smaller element zooms in more
await doubleTapOn(target2, 8, elementHeight-8, useTouchpad);
prev_resolution = resolution;
resolution = await getResolution();
ok(resolution > prev_resolution, "The second double-tap has increased the resolution to " + resolution);
let rect = target2.getBoundingClientRect();
info("rect " + rect.x + " " + rect.y + " " + rect.width + " " + rect.height);
info("vv " + visualViewport.offsetLeft + " " + visualViewport.offsetTop + " " + visualViewport.width + " " + visualViewport.height);
ok(visualViewport.offsetLeft < rect.x, "visual viewport contains zoom element left");
ok(visualViewport.offsetTop < rect.y, "visual viewport contains zoom element top");
ok(visualViewport.offsetLeft + visualViewport.width > rect.x + rect.width, "visual viewport contains zoom element right");
ok(visualViewport.offsetTop + visualViewport.height > rect.y + rect.height, "visual viewport contains zoom element bottom");
}
waitUntilApzStable()
.then(test)
.then(subtestDone, subtestFailed);
</script>
</head>
<body>
<div id="target1" style="background: blue; width: 50vw; height: 200px; position: absolute; top: 50vh;">
<div id="target2" style="background: green; width: 50px; height: 135px; position: absolute; right: 0;"></div>
</div>
</body>
</html>
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