fix: extract useTextResize hook

Author: jin-sir

src/ellipsisText/__tests__/useTextStyle.tsx

@@ -0,0 +1,125 @@
+import React from 'react';
+import { cleanup, render } from '@testing-library/react';
+import { act, renderHook } from '@testing-library/react-hooks';
+
+import useTextStyle from '../useTextStyle';
+import { getContainerWidth, getRangeWidth, getStyle } from '../utils';
+
+jest.mock('../utils', () => ({
+    getContainerWidth: jest.fn(),
+    getRangeWidth: jest.fn(),
+    getStyle: jest.fn(),
+}));
+
+describe('Test useTextStyle', () => {
+    const mockGetContainerWidth = getContainerWidth as jest.Mock;
+    const mockGetRangeWidth = getRangeWidth as jest.Mock;
+    const mockGetStyle = getStyle as jest.Mock;
+
+    beforeEach(() => {
+        cleanup();
+        jest.clearAllMocks();
+    });
+    it('should return a ref, overflow state, style, and trigger function', () => {
+        const { result } = renderHook(() => useTextStyle('Test Text'));
+        const [ref, isOverflow, style, updateTextStyle] = result.current;
+
+        expect(ref).toBeInstanceOf(Object);
+        expect(typeof isOverflow).toBe('boolean');
+        expect(style).toBeInstanceOf(Object);
+        expect(typeof updateTextStyle).toBe('function');
+    });
+
+    it('should calculate overflow correctly', () => {
+        const { result } = renderHook(() => useTextStyle('Test Text'));
+        const [ref, , , updateTextStyle] = result.current;
+
+        render(<span ref={ref}></span>);
+
+        mockGetRangeWidth.mockReturnValue(150);
+        mockGetContainerWidth.mockReturnValue(100);
+
+        act(() => {
+            updateTextStyle();
+        });
+
+        const [, isOverflow, style] = result.current;
+
+        expect(mockGetRangeWidth).toHaveBeenCalled();
+        expect(mockGetContainerWidth).toHaveBeenCalled();
+        expect(isOverflow).toBe(true);
+        expect(style.maxWidth).toBe(100);
+    });
+
+    it('should not overflow if the container width is sufficient', () => {
+        const { result } = renderHook(() => useTextStyle('Test Text'));
+        const [ref, , , updateTextStyle] = result.current;
+
+        render(<span ref={ref}></span>);
+
+        mockGetRangeWidth.mockReturnValue(80);
+        mockGetContainerWidth.mockReturnValue(100);
+
+        act(() => {
+            updateTextStyle();
+        });
+        const [, isOverflow, style] = result.current;
+
+        expect(isOverflow).toBe(false);
+        expect(style.maxWidth).toBe(100);
+    });
+
+    it('should inherit cursor style from parent', () => {
+        const { result } = renderHook(() => useTextStyle('Test Text'));
+        const [ref, , , updateTextStyle] = result.current;
+
+        render(<span ref={ref}></span>);
+
+        mockGetStyle.mockReturnValue('pointer');
+
+        act(() => {
+            updateTextStyle();
+        });
+        const [, , style] = result.current;
+
+        expect(style.cursor).toBe('pointer');
+    });
+
+    it('should have cursor style as default when text is not overflowing and parent cursor is default', () => {
+        const { result } = renderHook(() => useTextStyle('Test Text'));
+        const [ref, , , updateTextStyle] = result.current;
+
+        render(<span ref={ref}></span>);
+
+        mockGetRangeWidth.mockReturnValue(80);
+        mockGetContainerWidth.mockReturnValue(100);
+        mockGetStyle.mockReturnValue('default');
+
+        act(() => {
+            updateTextStyle();
+        });
+        const [, isOverflow, style] = result.current;
+
+        expect(isOverflow).toBe(false);
+        expect(style.cursor).toBe('default');
+    });
+
+    it('should have cursor style as pointer when text is overflowing and parent cursor is default', () => {
+        const { result } = renderHook(() => useTextStyle('Test Text'));
+        const [ref, , , updateTextStyle] = result.current;
+
+        render(<span ref={ref}></span>);
+
+        mockGetRangeWidth.mockReturnValue(150);
+        mockGetContainerWidth.mockReturnValue(100);
+        mockGetStyle.mockReturnValue('default');
+
+        act(() => {
+            updateTextStyle();
+        });
+        const [, isOverflow, style] = result.current;
+
+        expect(isOverflow).toBe(true);
+        expect(style.cursor).toBe('pointer');
+    });
+});

src/ellipsisText/index.tsx

@@ -1,23 +1,17 @@
-import React, {
-    CSSProperties,
-    ReactNode,
-    useCallback,
-    useLayoutEffect,
-    useRef,
-    useState,
-} from 'react';
+import React, { ReactNode, useCallback } from 'react';
 import { Tooltip } from 'antd';
 import { AbstractTooltipProps, RenderFunction } from 'antd/lib/tooltip';
 import classNames from 'classnames';
 
 import Resize from '../resize';
+import useTextStyle from './useTextStyle';
 import './style.scss';
 
 export interface IEllipsisTextProps extends AbstractTooltipProps {
     /**
      * 文本内容
      */
-    value: string | number | ReactNode | RenderFunction;
+    value: ReactNode | RenderFunction;
     /**
      * 提示内容
      * @default value
@@ -41,12 +35,6 @@ export interface IEllipsisTextProps extends AbstractTooltipProps {
     [propName: string]: any;
 }
 
-export interface NewHTMLElement extends HTMLElement {
-    currentStyle?: CSSStyleDeclaration;
-}
-
-const DEFAULT_MAX_WIDTH = 120;
-
 const EllipsisText = (props: IEllipsisTextProps) => {
     const {
         value,
@@ -56,190 +44,22 @@ const EllipsisText = (props: IEllipsisTextProps) => {
         watchParentSizeChange = false,
         ...otherProps
     } = props;
+    const [ref, isOverflow, style, onResize] = useTextStyle(value, maxWidth);
 
-    const ellipsisRef = useRef<HTMLSpanElement>(null);
     const observerEle =
-        watchParentSizeChange && ellipsisRef.current?.parentElement
-            ? ellipsisRef.current?.parentElement
-            : null;
-
-    const [visible, setVisible] = useState(false);
-    const [width, setWidth] = useState<number | string>(DEFAULT_MAX_WIDTH);
-    const [cursor, setCursor] = useState('default');
-
-    useLayoutEffect(() => {
-        onResize();
-    }, [value, maxWidth]);
-
-    /**
-     * @description: 根据属性名，获取dom的属性值
-     * @param {NewHTMLElement} dom
-     * @param {string} attr
-     * @return {*}
-     */
-    const getStyle = (dom: NewHTMLElement, attr: string) => {
-        // Compatible width IE8
-        // @ts-ignore
-        return window.getComputedStyle(dom)[attr] || dom.currentStyle[attr];
-    };
-
-    /**
-     * @description: 根据属性名，获取dom的属性值为number的属性。如： height、width。。。
-     * @param {NewHTMLElement} dom
-     * @param {string} attr
-     * @return {*}
-     */
-    const getNumTypeStyleValue = (dom: NewHTMLElement, attr: string) => {
-        return parseInt(getStyle(dom, attr));
-    };
-
-    /**
-     * @description: 10 -> 10,
-     * @description: 10px -> 10,
-     * @description: 90% -> ele.width * 0.9
-     * @description: calc(100% - 32px) -> ele.width - 32
-     * @param {*} ele
-     * @param {string & number} maxWidth
-     * @return {*}
-     */
-    const transitionWidth = (ele: HTMLElement, maxWidth: string | number) => {
-        const eleWidth = getActualWidth(ele);
-
-        if (typeof maxWidth === 'number') {
-            return maxWidth > eleWidth ? eleWidth : maxWidth; // 如果父元素的宽度小于传入的最大宽度，返回父元素的宽度
-        }
-
-        const numMatch = maxWidth.match(/^(\d+)(px)?$/);
-        if (numMatch) {
-            return +numMatch[1] > eleWidth ? eleWidth : +numMatch[1]; // 如果父元素的宽度小于传入的最大宽度，返回父元素的宽度
-        }
-
-        const percentMatch = maxWidth.match(/^(\d+)%$/);
-        if (percentMatch) {
-            return eleWidth * (parseInt(percentMatch[1]) / 100);
-        }
-
-        const relativeMatch = maxWidth.match(/^calc\(100% - (\d+)px\)$/);
-        if (relativeMatch) {
-            return eleWidth - parseInt(relativeMatch[1]);
-        }
-
-        return eleWidth;
-    };
-
-    const hideEleContent = (node: HTMLElement) => {
-        node.style.display = 'none';
-    };
-
-    const showEleContent = (node: HTMLElement) => {
-        node.style.display = 'inline-block';
-    };
-
-    /**
-     * @description: 获取能够得到宽度的最近父元素宽度。行内元素无法获得宽度，需向上查找父元素
-     * @param {HTMLElement} ele
-     * @return {*}
-     */
-    const getContainerWidth = (ele: HTMLElement): number | string => {
-        if (!ele) return DEFAULT_MAX_WIDTH;
-
-        const { scrollWidth, parentElement } = ele;
-
-        // 如果是行内元素，获取不到宽度，则向上寻找父元素
-        if (scrollWidth === 0) {
-            return getContainerWidth(parentElement!);
-        }
-        // 如果设置了最大宽度，则直接返回宽度
-        if (maxWidth) {
-            return transitionWidth(ele, maxWidth);
-        }
-
-        hideEleContent(ellipsisRef.current!);
-
-        const availableWidth = getAvailableWidth(ele);
-
-        return availableWidth < 0 ? 0 : availableWidth;
-    };
-
-    /**
-     * @description: 获取dom元素的内容宽度
-     * @param {HTMLElement} ele
-     * @return {*}
-     */
-    const getRangeWidth = (ele: HTMLElement): any => {
-        const range = document.createRange();
-        range.selectNodeContents(ele);
-        const rangeWidth = range.getBoundingClientRect().width;
-
-        return rangeWidth;
-    };
-
-    /**
-     * @description: 获取元素不包括 padding 的宽度
-     * @param {HTMLElement} ele
-     * @return {*}
-     */
-    const getActualWidth = (ele: HTMLElement) => {
-        const width = ele.getBoundingClientRect().width;
-        const paddingLeft = getNumTypeStyleValue(ele, 'paddingLeft');
-        const paddingRight = getNumTypeStyleValue(ele, 'paddingRight');
-        return width - paddingLeft - paddingRight;
-    };
-
-    /**
-     * @description: 获取dom的可用宽度
-     * @param {HTMLElement} ele
-     * @return {*}
-     */
-    const getAvailableWidth = (ele: HTMLElement) => {
-        const width = getActualWidth(ele);
-        const contentWidth = getRangeWidth(ele);
-        const ellipsisWidth = width - contentWidth;
-        return ellipsisWidth;
-    };
-
-    /**
-     * @description: 计算父元素的宽度是否满足内容的大小
-     * @return {*}
-     */
-    const onResize = () => {
-        const ellipsisNode = ellipsisRef.current!;
-        const parentElement = ellipsisNode.parentElement!;
-        const rangeWidth = getRangeWidth(ellipsisNode);
-        const containerWidth = getContainerWidth(parentElement);
-        const visible = rangeWidth > containerWidth;
-        setVisible(visible);
-        setWidth(containerWidth);
-        const parentCursor = getStyle(parentElement, 'cursor');
-        if (parentCursor !== 'default') {
-            // 继承父元素的 hover 手势
-            setCursor(parentCursor);
-        } else {
-            // 截取文本时，则改变 hover 手势为 pointer
-            visible && setCursor('pointer');
-        }
-        showEleContent(ellipsisNode);
-    };
+        watchParentSizeChange && ref.current?.parentElement ? ref.current?.parentElement : null;
 
     const renderText = useCallback(() => {
-        const style: CSSProperties = {
-            maxWidth: width,
-            cursor,
-        };
         return (
-            <span
-                ref={ellipsisRef}
-                className={classNames('dtc-ellipsis-text', className)}
-                style={style}
-            >
+            <span ref={ref} className={classNames('dtc-ellipsis-text', className)} style={style}>
                 {typeof value === 'function' ? value() : value}
             </span>
         );
-    }, [width, cursor, value]);
+    }, [style, value]);
 
     return (
         <Resize onResize={onResize} observerEle={observerEle}>
-            {visible ? (
+            {isOverflow ? (
                 <Tooltip title={title} mouseEnterDelay={0} mouseLeaveDelay={0} {...otherProps}>
                     {renderText()}
                 </Tooltip>