| 1 | // @flow
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| 2 | import type { Rect } from '../types';
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| 3 | import getDocumentElement from './getDocumentElement';
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| 4 | import getComputedStyle from './getComputedStyle';
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| 5 | import getWindowScrollBarX from './getWindowScrollBarX';
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| 6 | import getWindowScroll from './getWindowScroll';
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| 7 | import { max } from '../utils/math';
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| 8 |
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| 9 | // Gets the entire size of the scrollable document area, even extending outside
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| 10 | // of the `<html>` and `<body>` rect bounds if horizontally scrollable
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| 11 | export default function getDocumentRect(element: HTMLElement): Rect {
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| 12 | const html = getDocumentElement(element);
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| 13 | const winScroll = getWindowScroll(element);
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| 14 | const body = element.ownerDocument?.body;
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| 15 |
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| 16 | const width = max(
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| 17 | html.scrollWidth,
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| 18 | html.clientWidth,
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| 19 | body ? body.scrollWidth : 0,
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| 20 | body ? body.clientWidth : 0
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| 21 | );
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| 22 | const height = max(
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| 23 | html.scrollHeight,
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| 24 | html.clientHeight,
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| 25 | body ? body.scrollHeight : 0,
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| 26 | body ? body.clientHeight : 0
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| 27 | );
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| 28 |
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| 29 | let x = -winScroll.scrollLeft + getWindowScrollBarX(element);
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| 30 | const y = -winScroll.scrollTop;
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| 31 |
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| 32 | if (getComputedStyle(body || html).direction === 'rtl') {
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| 33 | x += max(html.clientWidth, body ? body.clientWidth : 0) - width;
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| 34 | }
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| 35 |
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| 36 | return { width, height, x, y };
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| 37 | }
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