Make Util.getPosition be relative to page
Commit 5108c4635c
caused a regression
in the case where scrolling is used -- getPosition return position
relative to the viewport, while getEventPosition expected a position
relative to the page.
As per
https://developer.mozilla.org/en-US/docs/Web/API/Element/getBoundingClientRect,
the fix for this is simply to add the `pageXOffset` and `pageYOffset` to
the output of `getBoundingClientRect()`.
Fixes #459.
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@ -436,7 +436,7 @@ Util.load_scripts = function (files) {
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Util.getPosition = function(obj) {
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"use strict";
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var objPosition = obj.getBoundingClientRect();
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return {'x': objPosition.left, 'y': objPosition.top};
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return {'x': objPosition.left + window.pageXOffset, 'y': objPosition.top + window.pageYOffset};
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};
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