121 lines
4.6 KiB
JavaScript
121 lines
4.6 KiB
JavaScript
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.calculateNodeStyling = calculateNodeStyling;
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exports.default = calculateAutoSizeStyle;
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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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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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pointer-events: none !important;
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`;
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const SIZING_STYLE = ['letter-spacing', 'line-height', 'padding-top', 'padding-bottom', 'font-family', 'font-weight', 'font-size', 'font-variant', 'text-rendering', 'text-transform', 'width', 'text-indent', 'padding-left', 'padding-right', 'border-width', 'box-sizing', 'word-break', 'white-space'];
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const computedStyleCache = {};
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let hiddenTextarea;
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function calculateNodeStyling(node) {
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let useCache = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
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const nodeRef = node.getAttribute('id') || node.getAttribute('data-reactid') || node.getAttribute('name');
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if (useCache && computedStyleCache[nodeRef]) {
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return computedStyleCache[nodeRef];
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}
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const style = window.getComputedStyle(node);
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const boxSizing = style.getPropertyValue('box-sizing') || style.getPropertyValue('-moz-box-sizing') || style.getPropertyValue('-webkit-box-sizing');
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const paddingSize = parseFloat(style.getPropertyValue('padding-bottom')) + parseFloat(style.getPropertyValue('padding-top'));
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const borderSize = parseFloat(style.getPropertyValue('border-bottom-width')) + 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 = {
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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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}
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return nodeInfo;
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}
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function calculateAutoSizeStyle(uiTextNode) {
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let useCache = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
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let minRows = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : null;
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let maxRows = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : null;
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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'));
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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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const {
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paddingSize,
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borderSize,
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boxSizing,
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sizingStyle
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} = calculateNodeStyling(uiTextNode, useCache);
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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 = undefined;
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let maxHeight = undefined;
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let overflowY;
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let height = hiddenTextarea.scrollHeight;
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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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}
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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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}
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}
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const style = {
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height: `${height}px`,
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overflowY,
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resize: 'none'
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};
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if (minHeight) {
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style.minHeight = `${minHeight}px`;
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}
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if (maxHeight) {
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style.maxHeight = `${maxHeight}px`;
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}
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return style;
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} |