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<!DOCTYPE HTML>
<html>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, minimum-scale=0.5">
<style>
html {
scrollbar-width: none; /* avoid scrollbar width is included in some metrics */
}
html, body {
margin: 0;
width: 100%;
height: 100%;
overflow: none;
}
#twice-width {
width: 200%;
height: 100%;
position: absolute;
}
</style>
<div id="twice-width"></div>
<script>
const is = opener.is.bind(opener);
const todo_is = opener.todo_is.bind(opener);
const add_task = opener.add_task.bind(opener);
const original_finish = opener.SimpleTest.finish;
const SimpleTest = opener.SimpleTest;
SimpleTest.finish = function finish() {
self.close();
original_finish();
}
add_task(async () => {
// Explicitly set to 0.5x so that this test doesn't need to reply on our
// auto initial-scale calculation.
SpecialPowers.getDOMWindowUtils(window).setResolutionAndScaleTo(0.5);
is(window.visualViewport.scale, 0.5, "The content should be scaled by 0.5x");
// Now the visual viewport size is same as the layout viewport.
const layoutViewportHeight = window.visualViewport.height;
todo_is(window.innerHeight, layoutViewportHeight,
"window.innerHeight should reflect the layout viewport (Bug 1598487)");
is(document.documentElement.scrollHeight, layoutViewportHeight,
"The root element's scrollHeight should be the layout viewport height");
is(document.documentElement.getBoundingClientRect().height,
layoutViewportHeight / 2,
"The content height should be half of the layout viewport height");
// Set scale to 1.0x so that the visual viport size becomes 0.5x of the layout
// viewport.
SpecialPowers.getDOMWindowUtils(window).setResolutionAndScaleTo(1);
is(window.visualViewport.scale, 1, "The content should be scaled by 1.0x");
is(window.visualViewport.height, layoutViewportHeight / 2,
"Now the visual viewport height should be changed to half of the layout " +
"viewport height");
todo_is(window.innerHeight, layoutViewportHeight,
"window.innerHeight shouldn't be changed (Bug 1598487)");
is(document.documentElement.scrollHeight, layoutViewportHeight,
"The root element's scrollHeight shouldn't be changed");
});
</script>
</html>
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