id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc
16753	[HIDPI] element.setSize sets wrong editor's dimensions if border's width is in fraction of pixels	Marek Lewandowski	Marek Lewandowski	"This come out from #14630.

There as a failing test:

{{{
Error details for tests/plugins/maximize/maximize
test maximize fire resize event with proper properties
Width should be restored.
Expected: 200 (number)
Actual:   202 (number)
}}}

When I started to investigate what's the cause of this - it took me all the way to [https://github.com/ckeditor/ckeditor-dev/blob/149813a/core/dom/element.js#L2160 setSize method], and then [https://github.com/ckeditor/ckeditor-dev/blob/149813a/core/dom/element.js#L2147-L2150 marginAndPaddingSize function].

The problem there was that resize plugin was setting editor size, using box model so that border width should be included as a part of with. But it did not consider that the width might ba a fraction of a pixel, as a result in mentioned test border width was something like ~0.9px - but it used it as 0px. Having `width` attribute set to 200px (because border were skipped) and including the border, the actual width of the element was 202px.

The issue was reproducible on all browsers for me."	Bug	closed	Normal	CKEditor 4.6.2	General		fixed