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55 lines
2.0 KiB
JavaScript
55 lines
2.0 KiB
JavaScript
import {
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isEmpty
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} from './StringUtil'
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/**
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* 处理富文本里的图片宽度自适应
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* 1.去掉img标签里的style、width、height属性
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* 2.img标签添加style属性：max-width:100%;height:auto
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* 3.修改所有style里的width属性为max-width:100%
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* 4.去掉<br/>标签
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* @param html
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* @returns {void|string|*}
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*/
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export function formatRichText(html) {
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let newContent = html.replace(/<img[^>]*>/gi, function(match, capture) {
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match = match.replace(/style="[^"]+"/gi, '').replace(/style='[^']+'/gi, '');
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match = match.replace(/width="[^"]+"/gi, '').replace(/width='[^']+'/gi, '');
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match = match.replace(/height="[^"]+"/gi, '').replace(/height='[^']+'/gi, '');
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return match;
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});
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newContent = newContent.replace(/style="[^"]+"/gi, function(match, capture) {
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match = match.replace(/width:[^;]+;/gi, 'max-width:100%;').replace(/width:[^;]+;/gi, 'max-width:100%;');
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return match;
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});
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newContent = newContent.replace(/<br[^>]*\/>/gi, '');
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newContent = newContent.replace(/\<img/gi, '<img style="max-width:100%;height:auto;display:block;margin:10px 0;"');
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return newContent;
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}
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/**
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* 替换 图片src
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* @param {Object} _content 富文本
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* @param {Object} _url 图片前缀
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*/
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export function replaceImgSrc(_content, _url) {
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console.log('_content', typeof(_content))
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if (isEmpty(_content)) {
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return _content;
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}
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// a 为富文本的字符串内容，为了测试，只写了img标签
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let b = /<img [^>]*src=['"]([^'"]+)[^>]*>/g; // img 标签取src里面内容的正则
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let s = _content.match(b); // 取到所有img标签 放到数组 s里面
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if (!isEmpty(s)) {
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for (let i = 0; i < s.length; i++) {
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let srcImg = s[i].replace(b, '$1'); //取src面的内容
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if (srcImg.slice(0, 4) == 'http' || srcImg.slice(0, 5) == 'https') {
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//若src前4位置或者前5位是http、https则不做任何修改
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} else {
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//修改富文本字符串内容 img标签src 相对路径改为绝对路径
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_content = _content.replace(srcImg, _url + srcImg);
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}
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}
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}
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return formatRichText(_content);
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}
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