[Konachan / yande.re / LB] Thumbnail Info: Fix Position

Pertaining to the info box that appears when holding shift while hovering over a thumbnail: Prevents the slight overlap over the thumbnail. And if the info box extends past the top of the window, it will be moved to the bottom or side.

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name		[Konachan / yande.re / LB] Thumbnail Info: Fix Position
// @namespace	Zolxys
// @description	Pertaining to the info box that appears when holding shift while hovering over a thumbnail: Prevents the slight overlap over the thumbnail. And if the info box extends past the top of the window, it will be moved to the bottom or side.
// @include		/^https?://konachan\.com/(post|pool/show/\d+)/?($|\?|#)/
// @include		/^https?://konachan\.net/(post|pool/show/\d+)/?($|\?|#)/
// @include		/^https?://yande\.re/(post|pool/show/\d+)/?($|\?|#)/
// @include		/^https?://lolibooru\.moe/(post|pool/show/\d+)/?($|\?|#)/
// @version		1.1
// ==/UserScript==
var mo = new MutationObserver(function (ma) {
	ma.forEach(function (m) {
		var o = m.target;
		var r = o.getBoundingClientRect();
		var tn = document.getElementById('index-hover-overlay').getBoundingClientRect();
		if (tn.height == 0) {
			tn = document.querySelectorAll('div:hover');
			tn = tn[tn.length - 1].getElementsByTagName('img')[0].getBoundingClientRect();
		}
		var vx = window.scrollX; vy = window.scrollY;
		var x = 0; y = 0;
		if (!o.visible())
			return;
		x = Math.max(Math.min(tn.left + (tn.width - r.width)/2, document.body.clientWidth), 0);
		if (r.height <= tn.top)
			y = tn.top - r.height;
		else if (r.height <= innerHeight - tn.bottom)
			y = tn.bottom;
		else {
			if (r.width <= tn.left)
				x = tn.left  - r.width;
			else
				x = tn.right;
			if (r.height >= innerHeight)
				y = Math.max(innerHeight - r.height, 0-vy);
		}
		if (Math.abs(r.top - y) >= 1 || Math.abs(r.left - x) >= 1) {
			o.style.left = (vx + x) +'px';
			o.style.top = (vy + y) +'px';
		}
	});
});
mo.observe(document.getElementById('index-hover-info'), {attributes: true, attributeFilter: ['style']});