document.getAnonymousElementByAttribute(this, "anonid", "scrollbox");
document.getAnonymousElementByAttribute(this, "anonid", "scrollbutton-up");
document.getAnonymousElementByAttribute(this, "anonid", "scrollbutton-down");
null
null
null
null
null
return true;
= this.duration ? 1 :
1 - Math.pow(1 - timePassed / this.duration, 2);
this.scrollbox.scrollPosition = this.startPos + (this.distance * pos);
if (pos == 1)
this.scrollbox._stopSmoothScroll();
else
window.mozRequestAnimationFrame();
}
})]]>
0 ? rect[end] + 1 : rect[start] - 1;
var nextElement = this._elementFromPoint(x, index);
if (!nextElement)
return;
var targetElement;
if (this._isRTLScrollbox)
index *= -1;
while (index < 0 && nextElement) {
if (this._canScrollToElement(nextElement))
targetElement = nextElement;
nextElement = nextElement.previousSibling;
index++;
}
while (index > 0 && nextElement) {
if (this._canScrollToElement(nextElement))
targetElement = nextElement;
nextElement = nextElement.nextSibling;
index--;
}
if (!targetElement)
return;
this.ensureElementIsVisible(targetElement, aSmoothScroll);
]]>
elements[high].getBoundingClientRect()[end])
return null;
var mid, rect;
while (low <= high) {
mid = Math.floor((low + high) / 2);
rect = elements[mid].getBoundingClientRect();
if (rect[start] > aX)
high = mid - 1;
else if (rect[end] < aX)
low = mid + 1;
else
return elements[mid];
}
// There's no element at the requested coordinate, but the algorithm
// from above yields an element next to it, in a random direction.
// The desired scrolling direction leads to the correct element.
if (!aPhysicalScrollDir)
return null;
if (aPhysicalScrollDir < 0 && rect[start] > aX)
mid = Math.max(mid - 1, 0);
else if (aPhysicalScrollDir > 0 && rect[end] < aX)
mid = Math.min(mid + 1, elements.length - 1);
return elements[mid];
]]>
0
[null, null]
1)
this._prevMouseScrolls.shift();
this._prevMouseScrolls.push(isVertical);
}
event.stopPropagation();
]]>
0
150
3)
return;
var scrollBack = (aEvent.originalTarget == this._scrollButtonUp);
var scrollLeftOrUp = this._isRTLScrollbox ? !scrollBack : scrollBack;
var targetElement;
if (aEvent.detail == 2) {
// scroll by the size of the scrollbox
let [start, end] = this._startEndProps;
let x;
if (scrollLeftOrUp)
x = this.scrollClientRect[start] - this.scrollClientSize;
else
x = this.scrollClientRect[end] + this.scrollClientSize;
targetElement = this._elementFromPoint(x, scrollLeftOrUp ? -1 : 1);
// the next partly-hidden element will become fully visible,
// so don't scroll too far
if (targetElement)
targetElement = scrollBack ?
targetElement.nextSibling :
targetElement.previousSibling;
}
if (!targetElement) {
// scroll to the first resp. last element
let elements = this._getScrollableElements();
targetElement = scrollBack ?
elements[0] :
elements[elements.length - 1];
}
this.ensureElementIsVisible(targetElement);
]]>