2017-12-06 10:54:20 +00:00
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// Thanks to https://github.com/andreypopp/react-textarea-autosize/
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2021-12-15 12:48:24 +00:00
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import type { CSSProperties } from 'vue';
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2017-12-06 10:54:20 +00:00
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/**
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* calculateNodeHeight(uiTextNode, useCache = false)
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*/
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const HIDDEN_TEXTAREA_STYLE = `
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2021-12-15 12:48:24 +00:00
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min-height:0 !important;
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max-height:none !important;
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height:0 !important;
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visibility:hidden !important;
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overflow:hidden !important;
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position:absolute !important;
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z-index:-1000 !important;
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top:0 !important;
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right:0 !important
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2019-01-12 03:33:27 +00:00
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`;
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2017-12-06 10:54:20 +00:00
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const SIZING_STYLE = [
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'letter-spacing',
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'line-height',
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'padding-top',
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'padding-bottom',
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'font-family',
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'font-weight',
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'font-size',
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2019-04-07 09:19:18 +00:00
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'font-variant',
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2017-12-06 10:54:20 +00:00
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'text-rendering',
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'text-transform',
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'width',
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'text-indent',
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'padding-left',
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'padding-right',
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'border-width',
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'box-sizing',
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'word-break',
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];
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2017-12-06 10:54:20 +00:00
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2020-10-16 06:24:14 +00:00
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export interface NodeType {
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sizingStyle: string;
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paddingSize: number;
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borderSize: number;
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boxSizing: string;
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}
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const computedStyleCache: { [key: string]: NodeType } = {};
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let hiddenTextarea: HTMLTextAreaElement;
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2017-12-06 10:54:20 +00:00
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2020-10-16 06:24:14 +00:00
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export function calculateNodeStyling(node: HTMLElement, useCache = false) {
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const nodeRef = (node.getAttribute('id') ||
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node.getAttribute('data-reactid') ||
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node.getAttribute('name')) as string;
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if (useCache && computedStyleCache[nodeRef]) {
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return computedStyleCache[nodeRef];
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2017-12-06 10:54:20 +00:00
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}
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const style = window.getComputedStyle(node);
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const boxSizing =
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style.getPropertyValue('box-sizing') ||
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style.getPropertyValue('-moz-box-sizing') ||
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style.getPropertyValue('-webkit-box-sizing');
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const paddingSize =
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parseFloat(style.getPropertyValue('padding-bottom')) +
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parseFloat(style.getPropertyValue('padding-top'));
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const borderSize =
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parseFloat(style.getPropertyValue('border-bottom-width')) +
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parseFloat(style.getPropertyValue('border-top-width'));
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const sizingStyle = SIZING_STYLE.map(name => `${name}:${style.getPropertyValue(name)}`).join(';');
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const nodeInfo: NodeType = {
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sizingStyle,
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paddingSize,
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borderSize,
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boxSizing,
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};
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if (useCache && nodeRef) {
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computedStyleCache[nodeRef] = nodeInfo;
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2017-12-06 10:54:20 +00:00
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}
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return nodeInfo;
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}
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export default function calculateNodeHeight(
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uiTextNode: HTMLTextAreaElement,
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useCache = false,
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minRows: number | null = null,
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maxRows: number | null = null,
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): CSSProperties {
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if (!hiddenTextarea) {
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hiddenTextarea = document.createElement('textarea');
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hiddenTextarea.setAttribute('tab-index', '-1');
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hiddenTextarea.setAttribute('aria-hidden', 'true');
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document.body.appendChild(hiddenTextarea);
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}
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// Fix wrap="off" issue
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// https://github.com/ant-design/ant-design/issues/6577
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if (uiTextNode.getAttribute('wrap')) {
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hiddenTextarea.setAttribute('wrap', uiTextNode.getAttribute('wrap') as string);
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} else {
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hiddenTextarea.removeAttribute('wrap');
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}
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// Copy all CSS properties that have an impact on the height of the content in
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// the textbox
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2019-01-03 12:51:56 +00:00
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const { paddingSize, borderSize, boxSizing, sizingStyle } = calculateNodeStyling(
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uiTextNode,
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useCache,
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);
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2017-12-06 10:54:20 +00:00
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// Need to have the overflow attribute to hide the scrollbar otherwise
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// text-lines will not calculated properly as the shadow will technically be
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// narrower for content
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hiddenTextarea.setAttribute('style', `${sizingStyle};${HIDDEN_TEXTAREA_STYLE}`);
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hiddenTextarea.value = uiTextNode.value || uiTextNode.placeholder || '';
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let minHeight = Number.MIN_SAFE_INTEGER;
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let maxHeight = Number.MAX_SAFE_INTEGER;
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let height = hiddenTextarea.scrollHeight;
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let overflowY: any;
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if (boxSizing === 'border-box') {
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// border-box: add border, since height = content + padding + border
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height += borderSize;
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} else if (boxSizing === 'content-box') {
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// remove padding, since height = content
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height -= paddingSize;
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2017-12-06 10:54:20 +00:00
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}
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if (minRows !== null || maxRows !== null) {
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// measure height of a textarea with a single row
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hiddenTextarea.value = ' ';
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const singleRowHeight = hiddenTextarea.scrollHeight - paddingSize;
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if (minRows !== null) {
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minHeight = singleRowHeight * minRows;
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if (boxSizing === 'border-box') {
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minHeight = minHeight + paddingSize + borderSize;
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}
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height = Math.max(minHeight, height);
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}
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if (maxRows !== null) {
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maxHeight = singleRowHeight * maxRows;
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if (boxSizing === 'border-box') {
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maxHeight = maxHeight + paddingSize + borderSize;
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}
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overflowY = height > maxHeight ? '' : 'hidden';
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height = Math.min(maxHeight, height);
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2017-12-06 10:54:20 +00:00
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}
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}
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return {
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height: `${height}px`,
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minHeight: `${minHeight}px`,
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maxHeight: `${maxHeight}px`,
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overflowY,
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resize: 'none',
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};
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}
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