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var scrollbarWidth = 17, scrollbarHeight = 17;
function testElements(baseid, callback)
{
scrollbarWidth = scrollbarHeight = gcs($("scrollbox-test"), "width");
var elements = $(baseid).getElementsByTagName("*");
for (var t = 0; t < elements.length; t++) {
var element = elements[t];
testElement(element);
}
var nonappended = document.createElement("div");
nonappended.id = "nonappended";
nonappended.setAttribute("_offsetParent", "null");
testElement(nonappended);
checkScrolledElement($("scrollbox"), $("scrollchild"));
var div = $("noscroll");
div.scrollLeft = 10;
div.scrollTop = 10;
is(element.scrollLeft, 0, element.id + " scrollLeft after nonscroll");
is(element.scrollTop, 0, element.id + " scrollTop after nonscroll");
callback();
}
function toNearestAppunit(v)
{
// 60 appunits per CSS pixel; round result to the nearest appunit
return Math.round(v*60)/60;
}
function isEqualAppunits(a, b, msg)
{
is(toNearestAppunit(a), toNearestAppunit(b), msg);
}
function testElement(element)
{
var offsetParent = element.getAttribute("_offsetParent");
offsetParent = $(offsetParent == "null" ? null: (offsetParent ? offsetParent : "body"));
var borderLeft = gcs(element, "borderLeftWidth");
var borderTop = gcs(element, "borderTopWidth");
var borderRight = gcs(element, "borderRightWidth");
var borderBottom = gcs(element, "borderBottomWidth");
var paddingLeft = gcs(element, "paddingLeft");
var paddingTop = gcs(element, "paddingTop");
var paddingRight = gcs(element, "paddingRight");
var paddingBottom = gcs(element, "paddingBottom");
var width = gcs(element, "width");
var height = gcs(element, "height");
if (element instanceof HTMLElement)
checkOffsetState(element, -10000, -10000,
borderLeft + paddingLeft + width + paddingRight + borderRight,
borderTop + paddingTop + height + paddingBottom + borderBottom,
offsetParent, element.id);
var scrollWidth, scrollHeight, clientWidth, clientHeight;
var doScrollCheck = true;
if (element.id == "scrollbox") {
var lastchild = $("lastline");
scrollWidth = lastchild.getBoundingClientRect().width + paddingLeft + paddingRight;
var top = element.firstChild.getBoundingClientRect().top;
var bottom = element.lastChild.getBoundingClientRect().bottom;
var contentsHeight = bottom - top;
scrollHeight = contentsHeight + paddingTop + paddingBottom;
clientWidth = paddingLeft + width + paddingRight - scrollbarWidth;
clientHeight = paddingTop + height + paddingBottom - scrollbarHeight;
} else {
clientWidth = paddingLeft + width + paddingRight;
clientHeight = paddingTop + height + paddingBottom;
if (element.id == "overflow-visible") {
scrollWidth = 200;
scrollHeight = 201;
} else if (element.scrollWidth > clientWidth ||
element.scrollHeight > clientHeight) {
// The element overflows. Don't check scrollWidth/scrollHeight since the
// above calculation is not correct.
doScrollCheck = false;
} else {
scrollWidth = clientWidth;
scrollHeight = clientHeight;
}
}
if (doScrollCheck) {
if (element instanceof SVGElement)
checkScrollState(element, 0, 0, 0, 0, element.id);
else
checkScrollState(element, 0, 0, scrollWidth, scrollHeight, element.id);
}
if (element instanceof SVGElement)
checkClientState(element, 0, 0, 0, 0, element.id);
else
checkClientState(element, borderLeft, borderTop, clientWidth, clientHeight, element.id);
var boundingrect = element.getBoundingClientRect();
isEqualAppunits(boundingrect.width, borderLeft + paddingLeft + width + paddingRight + borderRight,
element.id + " bounding rect width");
isEqualAppunits(boundingrect.height, borderTop + paddingTop + height + paddingBottom + borderBottom,
element.id + " bounding rect height");
isEqualAppunits(boundingrect.right - boundingrect.left, boundingrect.width,
element.id + " bounding rect right");
isEqualAppunits(boundingrect.bottom - boundingrect.top, boundingrect.height,
element.id + " bounding rect bottom");
var rects = element.getClientRects();
if (element.id == "div-displaynone" || element.id == "nonappended") {
is(rects.length, 0, element.id + " getClientRects empty");
}
else {
is(rects[0].left, boundingrect.left, element.id + " getClientRects left");
is(rects[0].top, boundingrect.top, element.id + " getClientRects top");
is(rects[0].right, boundingrect.right, element.id + " getClientRects right");
is(rects[0].bottom, boundingrect.bottom, element.id + " getClientRects bottom");
}
}
function checkScrolledElement(element, child)
{
var elemrect = element.getBoundingClientRect();
var childrect = child.getBoundingClientRect();
var topdiff = childrect.top - elemrect.top;
element.scrollTop = 20;
is(element.scrollLeft, 0, element.id + " scrollLeft after vertical scroll");
is(element.scrollTop, 20, element.id + " scrollTop after vertical scroll");
// If the viewport has been transformed, then we might have scrolled to a subpixel value
// that's slightly different from what we requested. After rounding, however, it should
// be the same.
is(Math.round(childrect.top - child.getBoundingClientRect().top), 20, "child position after vertical scroll");
element.scrollTop = 0;
is(element.scrollLeft, 0, element.id + " scrollLeft after vertical scroll reset");
is(element.scrollTop, 0, element.id + " scrollTop after vertical scroll reset");
// Scrolling back to the top should work precisely.
is(child.getBoundingClientRect().top, childrect.top, "child position after vertical scroll reset");
element.scrollTop = 10;
element.scrollTop = -30;
is(element.scrollLeft, 0, element.id + " scrollLeft after vertical scroll negative");
is(element.scrollTop, 0, element.id + " scrollTop after vertical scroll negative");
is(child.getBoundingClientRect().top, childrect.top, "child position after vertical scroll negative");
element.scrollLeft = 18;
is(element.scrollLeft, 18, element.id + " scrollLeft after horizontal scroll");
is(element.scrollTop, 0, element.id + " scrollTop after horizontal scroll");
is(Math.round(childrect.left - child.getBoundingClientRect().left), 18, "child position after horizontal scroll");
element.scrollLeft = -30;
is(element.scrollLeft, 0, element.id + " scrollLeft after horizontal scroll reset");
is(element.scrollTop, 0, element.id + " scrollTop after horizontal scroll reset");
is(child.getBoundingClientRect().left, childrect.left, "child position after horizontal scroll reset");
}
function checkOffsetState(element, left, top, width, height, parent, testname)
{
checkCoords(element, "offset", left, top, width, height, testname);
is(element.offsetParent, parent, testname + " offsetParent");
}
function checkScrollState(element, left, top, width, height, testname)
{
checkCoords(element, "scroll", left, top, width, height, testname);
}
function checkClientState(element, left, top, width, height, testname)
{
checkCoords(element, "client", left, top, width, height, testname);
}
function checkCoord(element, type, val, testname)
{
if (val != -10000)
is(element[type], Math.round(val), testname + " " + type);
}
function checkCoordFuzzy(element, type, val, fuzz, testname)
{
if (val != -10000)
ok(Math.abs(element[type] - Math.round(val)) <= fuzz, testname + " " + type);
}
function checkCoords(element, type, left, top, width, height, testname)
{
checkCoord(element, type + "Left", left, testname);
checkCoord(element, type + "Top", top, testname);
if (type == "scroll") {
// scrollWidth and scrollHeight can deviate by 1 pixel due to snapping.
checkCoordFuzzy(element, type + "Width", width, 1, testname);
checkCoordFuzzy(element, type + "Height", height, 1, testname);
} else {
checkCoord(element, type + "Width", width, testname);
checkCoord(element, type + "Height", height, testname);
}
if (element instanceof SVGElement)
return;
if (element.id == "outerpopup" && !element.parentNode.open) // closed popup
return;
if (element.id == "div-displaynone" || element.id == "nonappended") // hidden elements
ok(element[type + "Width"] == 0 && element[type + "Height"] == 0,
element.id + " has zero " + type + " width and height");
}
function gcs(element, prop)
{
var propVal = (element instanceof SVGElement && (prop == "width" || prop == "height")) ?
element.getAttribute(prop) : getComputedStyle(element, "")[prop];
if (propVal == "auto")
return 0;
return parseFloat(propVal);
}
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