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