semi-design/packages/semi-foundation/input/util/getSizingData.ts

// Reference to https://github.com/andreypopp/react-textarea-autosize/
import { pick } from 'lodash';

const SIZING_STYLE = [
    'borderBottomWidth',
    'borderLeftWidth',
    'borderRightWidth',
    'borderTopWidth',
    'boxSizing',
    'fontFamily',
    'fontSize',
    'fontStyle',
    'fontWeight',
    'letterSpacing',
    'lineHeight',
    'paddingBottom',
    'paddingLeft',
    'paddingRight',
    'paddingTop',
    // non-standard
    'tabSize',
    'textIndent',
    // non-standard
    'textRendering',
    'textTransform',
    'width',
];

const getSizingData = (node: any) => {
    const style = window.getComputedStyle(node);

    if (style === null) {
        return null;
    }

    const sizingStyle = pick(style, SIZING_STYLE);
    const { boxSizing } = sizingStyle;

    // probably node is detached from DOM, can't read computed dimensions
    if (boxSizing === '') {
        return null;
    }

    const paddingSize =
        parseFloat(sizingStyle.paddingBottom) +
        parseFloat(sizingStyle.paddingTop);

    const borderSize =
        parseFloat(sizingStyle.borderBottomWidth) +
        parseFloat(sizingStyle.borderTopWidth);

    return {
        sizingStyle,
        paddingSize,
        borderSize,
    };
};

export default getSizingData;