<!DOCTYPE HTML>
<html>
<head>
<meta name="viewport" content="width=device-width, height=device-height, initial-scale=1, user-scalable=no" />
<title>Scrolling by pages with fixed-pos headers and footers</title>
<style>
.fp { position:fixed; left:0; width:100%; }
.fp2 { position:fixed; left:0; width:100%; }
</style>
</head>
<body onscroll="didScroll()" onload="test()">
<div class="fp" id="top" style="top:0; height:10px; background:yellow;"></div>
<div class="fp2" id="top2" style="top:10px; height:11px; background:blue;"></div>
<div class="fp" style="top:50%; height:7px; background:cyan;"></div>
<div class="fp2" id="bottom2" style="bottom:9px; height:12px; background:red;"></div>
<div class="fp" id="bottom" style="bottom:0; height:13px; background:yellow;"></div>
<p id="target">Something to click on to get focus
<div style="height:3000px;"></div>
<pre id="test">
<script class="testbody">
var SimpleTest = window.opener.SimpleTest;
var SpecialPowers = window.opener.SpecialPowers;
var is = window.opener.is;
function showElements(show, classname) {
var elements = document.getElementsByClassName(classname);
for (var i = 0; i < elements.length; ++i) {
elements[i].style.display = show ? '' : 'none';
}
}
function showFixedPosElements(show) {
showElements(show, "fp");
}
function showFixedPosElements2(show) {
showElements(show, "fp2");
}
var nextCont;
function didScroll() {
var c = nextCont;
nextCont = null;
if (c) {
c();
}
}
function scrollDownOnePageWithContinuation(cont) {
document.documentElement.scrollTop = 0;
nextCont = cont;
window.scrollByPages(1);
}
function test() {
var smoothScrollPref = "general.smoothScroll";
SpecialPowers.pushPrefEnv({"set":[[smoothScrollPref, false]]}, runTest);
}
function runTest() {
showFixedPosElements(false);
showFixedPosElements2(false);
scrollDownOnePageWithContinuation(function() {
var fullPageScrollDown = document.documentElement.scrollTop;
showFixedPosElements(true);
scrollDownOnePageWithContinuation(function() {
var fullPageScrollDownWithHeaderAndFooter = document.documentElement.scrollTop;
is(fullPageScrollDownWithHeaderAndFooter, fullPageScrollDown - (10 + 13),
"Reduce scroll distance by size of small header and footer");
document.getElementById("bottom").style.height = (window.innerHeight - 20) + "px";
scrollDownOnePageWithContinuation(function() {
is(document.documentElement.scrollTop, fullPageScrollDown - 10,
"Ignore really big elements when reducing scroll size");
document.getElementById("bottom").style.height = "13px";
document.getElementById("top").style.width = "100px";
scrollDownOnePageWithContinuation(function() {
is(document.documentElement.scrollTop, fullPageScrollDown - 13,
"Ignore elements that don't span the entire viewport side");
document.getElementById("top").style.width = "100%";
showFixedPosElements2(true);
scrollDownOnePageWithContinuation(function() {
is(document.documentElement.scrollTop, fullPageScrollDown - (10 + 11 + 9 + 12),
"Combine multiple overlapping elements");
showFixedPosElements2(false);
document.getElementById("top").style.width = "400px";
scrollDownOnePageWithContinuation(function() {
is(document.documentElement.scrollTop, fullPageScrollDown - (10 + 13),
"Don't ignore elements that span more than half the viewport side");
document.getElementById("top").style.width = "100%";
document.getElementById("top").style.top = "-40px";
document.getElementById("top").style.transform = "translateY(38px)";
scrollDownOnePageWithContinuation(function() {
is(document.documentElement.scrollTop,
fullPageScrollDown - (10 + 13 - 40 + 38),
"Account for offset and transform");
document.getElementById("top").style.width = "100%";
// Scroll back up so test results are visible
document.documentElement.scrollTop = 0;
SimpleTest.finish();
window.close();
});
});
});
});
});
});
});
}
</script>
</pre>
</body>
</html>