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Bug 1387700 - Remove unused scrollByPage method. r=Gijs

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MozReview-Commit-ID: 2KWJvAhfev3

--HG--
extra : rebase_source : 44b45655947a49db9f5d235727b968cc260f859e
This commit is contained in:
Dão Gottwald 2017-11-15 16:14:35 +01:00
parent 57f5ff88dd
commit bf10cc0220
1 changed files with 0 additions and 54 deletions
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54
toolkit/content/widgets/scrollbox.xml
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@ -254,60 +254,6 @@
]]></body>
</method>
<method name="scrollByPage">
<parameter name="pageDelta"/>
<parameter name="aInstant"/>
<body><![CDATA[
if (pageDelta == 0)
return;
// If a previous call is still in progress because of smooth
// scrolling, we need to complete it before starting a new one.
if (this._scrollTarget) {
let elements = this._getScrollableElements();
if (this._scrollTarget != elements[0] &&
this._scrollTarget != elements[elements.length - 1])
this.ensureElementIsVisible(this._scrollTarget, true);
}
var [start, end] = this._startEndProps;
var rect = this.scrollClientRect;
var containerEdge = pageDelta > 0 ? rect[end] + 1 : rect[start] - 1;
var pixelDelta = pageDelta * (rect[end] - rect[start]);
var destinationPosition = containerEdge + pixelDelta;
var nextElement = this._elementFromPoint(containerEdge, pageDelta);
if (!nextElement)
return;
// We need to iterate over our elements in the direction of pageDelta.
// pageDelta is the physical direction, so in a horizontal scroll box,
// positive values scroll to the right no matter if the scrollbox is
// LTR or RTL. But RTL changes how we need to advance the iteration
// (whether to get the next or the previous sibling of the current
// element).
var logicalAdvanceDir = pageDelta * (this._isRTLScrollbox ? -1 : 1);
var advance = logicalAdvanceDir > 0 ? (e => e.nextSibling) : (e => e.previousSibling);
var extendsPastTarget = (pageDelta > 0)
? (e => e.getBoundingClientRect()[end] > destinationPosition)
: (e => e.getBoundingClientRect()[start] < destinationPosition);
// We want to scroll to the last element we encounter before we find
// an element which extends past destinationPosition.
var targetElement;
do {
if (this._canScrollToElement(nextElement))
targetElement = nextElement;
nextElement = advance(nextElement);
} while (nextElement && !extendsPastTarget(nextElement));
if (!targetElement)
return;
this.ensureElementIsVisible(targetElement, aInstant);
]]></body>
</method>
<method name="_getScrollableElements">
<body><![CDATA[
var nodes = this.childNodes;