gecko/layout/base/tests/test_scroll_snapping_scrollbars.html

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<!DOCTYPE HTML>
<html>
<head>
<title>Test for scroll snapping</title>
<script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
<script type="text/javascript" src="/tests/SimpleTest/EventUtils.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<p id="display"></p>
<div id="sc" style="margin: 0px; padding: 0px; overflow: scroll; width:250px; height: 250px;">
<div id="sd" style="margin: 0px; padding: 0px; width: 1250px; height: 1250px;"></div>
</div>
<pre id="test">
<script class="testbody" type="text/javascript">
var runtime = SpecialPowers.Cc["@mozilla.org/xre/app-info;1"]
.getService(SpecialPowers.Ci.nsIXULRuntime);
var isMac = navigator.platform.indexOf("Mac") != -1;
var isGtk = runtime.widgetToolkit.indexOf("gtk") != -1;
var isWin = navigator.platform.indexOf("Win") != -1;
var isSN = /mac os x 10\.6/.test(navigator.userAgent.toLowerCase());
// Half of the scrollbar control width, in CSS pixels
var scrollbarOffset = isWin ? 8 : 5;
// OSX 10.6 scroll bar thumbs are off-center due to the bundling of buttons on one end
// of the scroll bar frame.
var scrollbarCenter = isSN ? 100 : 125;
var testCases = [
{
"description" : "Drag scrollbar left, expect scroll snapping.",
"snapCoord" : "500px 500px",
"startScroll" : { "x" : 500, "y" : 500 },
"endScroll" : { "x" : 500, "y" : 500 },
"mousePosition" : { "x" : scrollbarCenter, "y" : 250 - scrollbarOffset },
"mouseOffset" : { "x" : -10, "y" : 0 },
"duration" : "0",
"runMac" : true,
"runGtk" : true,
"runWin" : true
},
{
"description" : "Drag scrollbar right, expect scroll snapping.",
"snapCoord" : "500px 500px",
"startScroll" : { "x" : 500, "y" : 500 },
"endScroll" : { "x" : 500, "y" : 500 },
"mousePosition" : { "x" : scrollbarCenter, "y" : 250 - scrollbarOffset },
"mouseOffset" : { "x" : 10, "y" : 0 },
"duration" : "0",
"runMac" : true,
"runGtk" : true,
"runWin" : true
},
{
"description" : "Drag scrollbar up, expect scroll snapping.",
"snapCoord" : "500px 500px",
"startScroll" : { "x" : 500, "y" : 500 },
"endScroll" : { "x" : 500, "y" : 500 },
"mousePosition" : { "x" : 250 - scrollbarOffset, "y" : scrollbarCenter },
"mouseOffset" : { "x" : 0, "y" : -10 },
"duration" : "0",
"runMac" : true,
"runGtk" : true,
"runWin" : true
},
{
"description" : "Drag scrollbar down, expect scroll snapping.",
"snapCoord" : "500px 500px",
"startScroll" : { "x" : 500, "y" : 500 },
"endScroll" : { "x" : 500, "y" : 500 },
"mousePosition" : { "x" : 250 - scrollbarOffset, "y" : scrollbarCenter },
"mouseOffset" : { "x" : 0, "y" : 10 },
"duration" : "0",
"runMac" : true,
"runGtk" : true,
"runWin" : true
},
{
"description" : "Page scrollbar left, expect scroll snapping.",
"snapCoord" : "500px 500px, 1000px 500px",
"startScroll" : { "x" : 1000, "y" : 500 },
"endScroll" : { "x" : 500, "y" : 500 },
"mousePosition" : { "x" : 50, "y" : 250 - scrollbarOffset },
"mouseOffset" : { "x" : 0, "y" : 0 },
"duration" : "0",
"runMac" : true,
"runGtk" : true,
"runWin" : true
},
{
"description" : "Page scrollbar right, expect scroll snapping.",
"snapCoord" : "500px 500px, 0px 500px",
"startScroll" : { "x" : 0, "y" : 500 },
"endScroll" : { "x" : 500, "y" : 500 },
"mousePosition" : { "x" : 200, "y" : 250 - scrollbarOffset },
"mouseOffset" : { "x" : 0, "y" : 0 },
"duration" : "0",
"runMac" : true,
"runGtk" : true,
"runWin" : true
},
{
"description" : "Page scrollbar up, expect scroll snapping.",
"snapCoord" : "500px 500px, 500px 1000px",
"startScroll" : { "x" : 500, "y" : 1000 },
"endScroll" : { "x" : 500, "y" : 500 },
"mousePosition" : { "x" : 250 - scrollbarOffset, "y" : 50 },
"mouseOffset" : { "x" : 0, "y" : 0 },
"duration" : "0",
"runMac" : true,
"runGtk" : true,
"runWin" : true
},
{
"description" : "Page scrollbar down, expect scroll snapping.",
"snapCoord" : "500px 500px, 500px 0px",
"startScroll" : { "x" : 500, "y" : 0 },
"endScroll" : { "x" : 500, "y" : 500 },
"mousePosition" : { "x" : 250 - scrollbarOffset, "y" : 200 },
"mouseOffset" : { "x" : 0, "y" : 0 },
"duration" : "0",
"runMac" : true,
"runGtk" : true,
"runWin" : true
},
{
"description" : "Click scrollbar left button, expect scroll snapping.",
"snapCoord" : "50px 500px, 250px 500px, 500px 500px, 750px 500px, 950px 500px",
"startScroll" : { "x" : 500, "y" : 500 },
"endScroll" : { "x" : 250, "y" : 500 },
"mousePosition" : { "x" : scrollbarOffset, "y" : 250 - scrollbarOffset },
"mouseOffset" : { "x" : 0, "y" : 0 },
"duration" : "0",
"runMac" : false, // OSX does not have have line-scroll buttons
"runGtk" : true,
"runWin" : true
},
{
"description" : "Hold scrollbar left button until repeating, expect scroll snapping.",
"snapCoord" : "50px 500px, 500px 500px, 950px 500px",
"startScroll" : { "x" : 500, "y" : 500 },
"endScroll" : { "x" : 50, "y" : 500 },
"mousePosition" : { "x" : scrollbarOffset, "y" : 250 - scrollbarOffset },
"mouseOffset" : { "x" : 0, "y" : 0 },
"duration" : "500",
"runMac" : false, // OSX does not have have line-scroll buttons
"runGtk" : true,
"runWin" : true
},
{
"description" : "Click scrollbar right button, expect scroll snapping.",
"snapCoord" : "50px 500px, 250px 500px, 500px 500px, 750px 500px, 950px 500px",
"startScroll" : { "x" : 500, "y" : 500 },
"endScroll" : { "x" : 750, "y" : 500 },
"mousePosition" : { "x" : 250 - scrollbarOffset * 3, "y" : 250 - scrollbarOffset },
"mouseOffset" : { "x" : 0, "y" : 0 },
"duration" : "0",
"runMac" : false, // OSX does not have have line-scroll buttons
"runGtk" : true,
"runWin" : true
},
{
"description" : "Hold scrollbar right button until repeating, expect scroll snapping.",
"snapCoord" : "50px 500px, 500px 500px, 950px 500px",
"startScroll" : { "x" : 500, "y" : 500 },
"endScroll" : { "x" : 950, "y" : 500 },
"mousePosition" : { "x" : 250 - scrollbarOffset * 3, "y" : 250 - scrollbarOffset },
"mouseOffset" : { "x" : 0, "y" : 0 },
"duration" : "500",
"runMac" : false, // OSX does not have have line-scroll buttons
"runGtk" : true,
"runWin" : true
},
{
"description" : "Click scrollbar up button, expect scroll snapping.",
"snapCoord" : "500px 50px, 500px 250px, 500px 500px, 500px 750px, 500px 950px",
"startScroll" : { "x" : 500, "y" : 500 },
"endScroll" : { "x" : 500, "y" : 250 },
"mousePosition" : { "x" : 250 - scrollbarOffset, "y" : scrollbarOffset },
"mouseOffset" : { "x" : 0, "y" : 0 },
"duration" : "0",
"runMac" : false, // OSX does not have have line-scroll buttons
"runGtk" : true,
"runWin" : true
},
{
"description" : "Hold scrollbar up button until repeating, expect scroll snapping.",
"snapCoord" : "500px 50px, 500px 500px, 500px 950px",
"startScroll" : { "x" : 500, "y" : 500 },
"endScroll" : { "x" : 500, "y" : 50 },
"mousePosition" : { "x" : 250 - scrollbarOffset, "y" : scrollbarOffset },
"mouseOffset" : { "x" : 0, "y" : 0 },
"duration" : "500",
"runMac" : false, // OSX does not have have line-scroll buttons
"runGtk" : true,
"runWin" : true
},
{
"description" : "Click scrollbar down button, expect scroll snapping.",
"snapCoord" : "500px 50px, 500px 250px, 500px 500px, 500px 750px, 500px 950px",
"startScroll" : { "x" : 500, "y" : 500 },
"endScroll" : { "x" : 500, "y" : 750 },
"mousePosition" : { "x" : 250 - scrollbarOffset, "y" : 250 - scrollbarOffset * 3},
"mouseOffset" : { "x" : 0, "y" : 0 },
"duration" : "0",
"runMac" : false, // OSX does not have have line-scroll buttons
"runGtk" : true,
"runWin" : true
},
{
"description" : "Hold scrollbar down button until repeating, expect scroll snapping.",
"snapCoord" : "500px 50px, 500px 500px, 500px 950px",
"startScroll" : { "x" : 500, "y" : 500 },
"endScroll" : { "x" : 500, "y" : 950 },
"mousePosition" : { "x" : 250 - scrollbarOffset, "y" : 250 - scrollbarOffset * 3},
"mouseOffset" : { "x" : 0, "y" : 0 },
"duration" : "500",
"runMac" : false, // OSX does not have have line-scroll buttons
"runGtk" : true,
"runWin" : true
},
];
var step = 0;
var sc; // Scroll Container
var sd; // Scrolled Div
var lastScrollTop;
var lastScrollLeft;
var stopFrameCount;
function doTest() {
var testCase = testCases[step];
stopFrameCount = 0;
lastScrollTop = sc.scrollTop;
lastScrollLeft = sc.scrollLeft;
sc.scrollTo(testCase.startScroll.x, testCase.startScroll.y);
sc.style.scrollSnapType = "mandatory";
sd.style.scrollSnapCoordinate = testCase.snapCoord;
synthesizeMouse(sc,
testCase.mousePosition.x,
testCase.mousePosition.y,
{ type: "mousedown" });
synthesizeMouse(sc,
testCase.mousePosition.x + testCase.mouseOffset.x,
testCase.mousePosition.y + testCase.mouseOffset.y,
{ type: "mousemove" });
window.requestAnimationFrame(function() {
isnot("(" + sc.scrollLeft + "," + sc.scrollTop + ")",
"(" + testCase.startScroll.x +"," + testCase.startScroll.y + ")",
"Step " + step + ": Synthesized mouse events move scroll position. ("
+ testCase.description + ")");
window.setTimeout(function() {
synthesizeMouse(sc,
testCase.mousePosition.x + testCase.mouseOffset.x,
testCase.mousePosition.y + testCase.mouseOffset.y,
{ type: "mouseup" });
window.requestAnimationFrame(waitForScrollStop);
}, testCase.duration);
});
}
function waitForScrollStop() {
if (stopFrameCount > 30) {
// We have the same position for 30 consecutive frames -- we are stopped
verifyTest();
} else {
// Still moving
if (lastScrollTop == sc.scrollTop && lastScrollLeft == sc.scrollLeft) {
stopFrameCount++;
} else {
stopFrameCount = 0;
lastScrollTop = sc.scrollTop;
lastScrollLeft = sc.scrollLeft;
}
window.requestAnimationFrame(waitForScrollStop);
}
}
function verifyTest() {
// Test ended, check if scroll position matches expected position
var testCase = testCases[step];
is("(" + sc.scrollLeft + "," + sc.scrollTop + ")",
"(" + testCase.endScroll.x +"," + testCase.endScroll.y + ")",
"Step " + step + ": " + testCase.description);
// Find next test to run
while (true) {
if (++step == testCases.length) {
SimpleTest.finish();
break;
} else {
testCase = testCases[step];
if ((testCase.runGtk && isGtk)
|| (testCase.runMac && isMac)
|| (testCase.runWin && isWin)) {
doTest();
break;
}
}
}
}
SimpleTest.waitForExplicitFinish();
SimpleTest.requestFlakyTimeout("Delays added to allow synthesized mouse " +
"events to trigger scrollbar repeating scrolls.");
addLoadEvent(function() {
sc = document.getElementById("sc");
sd = document.getElementById("sd");
SpecialPowers.pushPrefEnv({
"set": [["layout.css.scroll-snap.enabled", true],
["layout.css.scroll-snap.proximity-threshold", 100]]},
doTest);
});
</script>
</pre>
</body>
</html>