657 lines
21 KiB
Vue
657 lines
21 KiB
Vue
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<template>
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<text
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:eid="eid"
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:change:eid="quillEditor.watchEID"
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:sid="sid"
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:change:sid="quillEditor.watchStartID"
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:video="videoUrl"
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:change:pastemode="quillEditor.watchPasteMode"
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:pastemode="pastemode"
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:change:video="quillEditor.watchVideoUrl"
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:cover="coverUrl"
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:change:cover="quillEditor.watchCoverUrl"
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:coverios="coverUrlIOS"
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:change:coverios="quillEditor.watchCoverUrlIOS"
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></text>
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</template>
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<script>
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/**
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* 富文本plugin特殊扩展
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* @author sonve
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* @version 1.0.0
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* @date 2024-12-14
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*/
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export default {
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props: {
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sid: {
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type: String,
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default: ''
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},
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eid: {
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type: String,
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default: ''
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}
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},
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data() {
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return {
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videoUrl: '', // 视频地址
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coverUrl: '', // 封面地址
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coverUrlIOS: '', // ios端封面地址
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pastemode: 'text' // 粘贴模式 text | origin
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}
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},
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mounted() {},
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methods: {
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changePasteMode(e) {
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this.pastemode = e
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},
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editorPaste(e) {
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this.$emit('epaste', e)
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},
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createVideoThumbnail(url) {
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this.videoUrl = url
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},
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getVideoThumbnail(e) {
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// e: { video, cover }
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uni.$emit(`E_EDITOR_GET_VIDEO_THUMBNAIL_${e.video}`, e)
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},
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createCoverThumbnail(url) {
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// #ifdef H5
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this.coverUrl = url
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// #endif
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// #ifdef APP
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const isIOS = uni.getSystemInfoSync().platform == 'ios'
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if (isIOS) {
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this.coverUrlIOS = url // iOS用不了OffscreenCanvas
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} else {
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this.coverUrl = url
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}
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// #endif
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},
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getCoverThumbnail(e) {
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// e: { image, cover }
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uni.$emit(`E_EDITOR_GET_COVER_THUMBNAIL_${e.image}`, e)
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}
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}
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}
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</script>
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<script module="quillEditor" lang="renderjs">
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import config from '../common/config.js'
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export default {
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data() {
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return {
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editorID: '',
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idStack: [], // sid栈
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matcherMode: '' // 粘贴模式 text | origin
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}
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},
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methods: {
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/**
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* 注意：watch频繁触发时需要异步修改，否则可能会导致监听不到
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*/
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watchPasteMode(newValue, oldValue, ownerInstance, instance) {
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if (newValue) {
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this.matcherMode = newValue
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}
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},
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watchStartID(newValue, oldValue, ownerInstance, instance) {
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if (newValue) {
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this.addMatcher(newValue)
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}
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},
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watchEID(newValue, oldValue, ownerInstance, instance) {
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if (newValue) {
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this.editorID = newValue
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}
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},
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watchVideoUrl(newValue, oldValue, ownerInstance, instance) {
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if (newValue) {
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this.generateVideoThumbnail(newValue).then((res) => {
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this.$ownerInstance.callMethod('getVideoThumbnail', {
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video: newValue,
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cover: res
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})
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})
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}
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},
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watchCoverUrl(newValue, oldValue, ownerInstance, instance) {
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if (newValue) {
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this.generateCoverThumbnail(newValue).then((res) => {
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this.$ownerInstance.callMethod('getCoverThumbnail', {
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image: newValue,
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cover: res
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})
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})
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}
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},
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/**
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* Only Apple Can Do !!!
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*/
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watchCoverUrlIOS(newValue, oldValue, ownerInstance, instance) {
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if (newValue) {
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this.generateCoverThumbnailIOS(newValue).then((res) => {
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this.$ownerInstance.callMethod('getCoverThumbnail', {
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image: newValue,
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cover: res
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})
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})
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}
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},
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/**
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* 保留格式粘贴内容
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* @description 此方式尽可能保留原格式，易于再编辑，但是部分格式会丢失
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* @param {String} sid 当前编辑器id
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*/
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addMatcher(sid) {
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if(this.idStack.includes(sid)) return // 禁止重复添加Matcher
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this.idStack.push(sid)
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const el = document.querySelector(`#${sid}`);
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const quill = Quill.find(el);
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const getStyleAttributes = (node, style) => {
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let attributes = {}
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// node属性
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const width = node.getAttribute('width');
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const height = node.getAttribute('height');
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if (width) attributes.width = width
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if (height) attributes.height = height
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const dataCustom = node.getAttribute('data-custom');
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if (dataCustom) attributes['data-custom'] = dataCustom;
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// style样式
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if (style.textAlign) attributes.align = style.textAlign;
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if (style.fontWeight === 'bold' || style.fontWeight === '700') attributes.bold = true;
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if (style.fontStyle === 'italic') attributes.italic = true;
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if (style.textDecoration.includes('underline')) attributes.underline = true;
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if (style.textDecoration.includes('line-through')) attributes.strike = true;
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if (style.verticalAlign === 'super') attributes.script = 'super'
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if (style.verticalAlign === 'sub') attributes.script = 'sub'
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if (style.fontFamily) attributes.font = style.fontFamily;
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if (style.fontSize) attributes.size = parseFloat(style.fontSize);
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if (style.color) attributes.color = style.color;
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if (style.backgroundColor) attributes.background = style.backgroundColor;
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return attributes
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}
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const processNode = (node) => {
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let ops = [];
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if (node.nodeType === Node.ELEMENT_NODE) {
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const computedStyle = document.defaultView.getComputedStyle(node);
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// 处理 <img> 标签
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if (node.tagName === 'IMG') {
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const imgSrc = node.getAttribute('src');
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if (imgSrc) {
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ops.push({ insert: '\n' }); // 插入换行符，确保图片前有一个空行
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ops.push({
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insert: { image: imgSrc },
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attributes: getStyleAttributes(node, computedStyle)
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});
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ops.push({ insert: '\n' }); // 插入换行符，确保图片后有一个空行
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return ops; // 不参与递归
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}
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}
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// 处理 <p> 和 <div> 标签
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else if (node.tagName === 'P' || node.tagName === 'DIV') {
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ops.push({ insert: '\n' }); // 插入换行符
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}
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// 处理 <ol> 标签 有序
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else if (node.tagName === 'OL') {
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// ops.push({ insert: '\n', attributes: { list: 'ordered' } });
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}
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// 处理 <ul> 标签 无序
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else if (node.tagName === 'UL') {
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// ops.push({ insert: '\n', attributes: { list: 'bullet' } });
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}
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// 处理 <li> 标签
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else if (node.tagName === 'LI') {
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ops.push({ insert: '\n' });
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}
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// 处理 <hr> 标签
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else if (node.tagName === 'HR') {
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ops.push({ insert: '\n' }); // 插入换行符
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ops.push({ insert: { divider: true } });
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return ops; // 不参与递归
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}
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// 处理 <a> 标签
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else if (node.tagName === 'A') {
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const href = node.getAttribute('href');
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const textContent = node.textContent.trim();
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if (href && textContent) {
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ops.push({
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insert: ' ' + textContent + ' ',
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attributes: {
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link: href,
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textDecoration: computedStyle.textDecoration,
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...getStyleAttributes(node, computedStyle)
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}
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});
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return ops; // 不参与递归
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}
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}
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// 处理 <h1> 到 <h6> 标题
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else if (['H1', 'H2', 'H3', 'H4', 'H5', 'H6'].includes(node.tagName)) {
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// 处理 <h1> 到 <h6> 标题，生成 header 操作
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const headerLevel = parseInt(node.tagName.charAt(1), 10);
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const textContent = node.textContent.trim();
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if (textContent) {
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ops.push({
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insert: textContent + '\n', // 必须要加上换行
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attributes: {
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header: headerLevel,
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...getStyleAttributes(node, computedStyle)
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}
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});
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return ops; // 不参与递归
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}
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}
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// 递归处理子节点
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for (let child of node.childNodes) {
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ops = ops.concat(processNode(child));
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}
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} else if (node.nodeType === Node.TEXT_NODE) {
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const textContent = node.nodeValue.trim();
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if (textContent) {
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// 从父元素获取样式
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const parentNode = node.parentNode;
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if (parentNode) {
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const computedStyle = document.defaultView.getComputedStyle(parentNode);
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ops.push({
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insert: textContent,
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attributes: getStyleAttributes(parentNode, computedStyle)
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});
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} else {
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// 如果没有父元素，直接插入文本
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ops.push({ insert: textContent });
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}
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}
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}
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return ops;
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}
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quill.clipboard.addMatcher(Node.ELEMENT_NODE, (node, delta) => {
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if (this.matcherMode == 'origin') {
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let newOps = processNode(node);
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if (newOps.length > 0) {
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return { ops: newOps };
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}
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}
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return delta;
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})
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const cleanClipboardHTML = (html, text) => {
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if(!html) return text
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// 使用正则表达式匹配 <!--StartFragment--> 和 <!--EndFragment--> 之间的内容
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const fragmentRegex = /<!--StartFragment-->([\s\S]*?)<!--EndFragment-->/;
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const match = html.match(fragmentRegex);
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if (match && match[1]) {
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// 返回匹配到的内容
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return match[1].trim();
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}
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// 如果没有匹配到片段内容，返回原始 HTML
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return html;
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}
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el.addEventListener('paste', (e) => {
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let clipboardText = e.clipboardData.getData('text/plain'); // 获取剪切板中的纯文本内容
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let clipboardHtml = e.clipboardData.getData('text/html'); // 获取剪切板中的 HTML 内容（如果存在）
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clipboardHtml = cleanClipboardHTML(clipboardHtml, clipboardText)
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setTimeout(() => {
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this.$ownerInstance.callMethod('editorPaste', {
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id: sid,
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text: clipboardText,
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html: clipboardHtml,
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range: quill.getSelection() // 获取当前光标位置
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})
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}, 100);
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});
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},
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/**
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* 保留格式粘贴内容
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|||
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* @description 此方式虽然可以极大程度保留格式，但是会导致粘贴下来的内容为一整个块，且不易再编辑
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* @param {String} sid 当前编辑器id
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*/
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/*
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addMatcher(sid) {
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if(this.idStack.includes(sid)) return // 禁止重复添加Matcher
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this.idStack.push(sid)
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// 引入源码中的BlockEmbed
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const BlockEmbed = Quill.import('blots/block/embed');
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// 定义新的blot类型
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class AppPanelEmbed extends BlockEmbed {
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static create(value) {
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const node = super.create(value);
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node.setAttribute('width', '100%');
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// 设置自定义html
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node.innerHTML = this.transformValue(value)
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return node;
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}
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static transformValue(value) {
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let handleArr = value.split('\n')
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|
|
handleArr = handleArr.map(e => e.replace(/^[\s]+/, '').replace(/[\s]+$/, ''))
|
|||
|
|
return handleArr.join('')
|
|||
|
|
}
|
|||
|
|
// 返回节点自身的value值 用于撤销操作
|
|||
|
|
static value(node) {
|
|||
|
|
return node.innerHTML
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
// blotName
|
|||
|
|
AppPanelEmbed.blotName = 'AppPanelEmbed';
|
|||
|
|
// 标签类型自定义
|
|||
|
|
AppPanelEmbed.tagName = 'p';
|
|||
|
|
Quill.register(AppPanelEmbed, true);
|
|||
|
|
|
|||
|
|
const el = document.querySelector(`#${sid}`);
|
|||
|
|
const quill = Quill.find(el);
|
|||
|
|
|
|||
|
|
const cleanClipboardHTML = (html, text) => {
|
|||
|
|
if(!html) return text
|
|||
|
|
// 使用正则表达式匹配 <!--StartFragment--> 和 <!--EndFragment--> 之间的内容
|
|||
|
|
const fragmentRegex = /<!--StartFragment-->([\s\S]*?)<!--EndFragment-->/;
|
|||
|
|
const match = html.match(fragmentRegex);
|
|||
|
|
|
|||
|
|
if (match && match[1]) {
|
|||
|
|
// 返回匹配到的内容
|
|||
|
|
return match[1].trim();
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// 如果没有匹配到片段内容，返回原始 HTML
|
|||
|
|
return html;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
el.addEventListener('paste', (e) => {
|
|||
|
|
e.preventDefault();
|
|||
|
|
|
|||
|
|
let clipboardText = e.clipboardData.getData('text/plain'); // 获取剪切板中的纯文本内容
|
|||
|
|
let clipboardHtml = e.clipboardData.getData('text/html'); // 获取剪切板中的 HTML 内容（如果存在）
|
|||
|
|
clipboardHtml = cleanClipboardHTML(clipboardHtml, clipboardText)
|
|||
|
|
|
|||
|
|
this.$ownerInstance.callMethod('editorPaste', {
|
|||
|
|
id: sid,
|
|||
|
|
text: clipboardText,
|
|||
|
|
html: clipboardHtml
|
|||
|
|
})
|
|||
|
|
|
|||
|
|
setTimeout(() => {
|
|||
|
|
const range = quill.getSelection(); // 获取当前光标位置
|
|||
|
|
quill.insertEmbed(range.index, 'AppPanelEmbed', clipboardHtml);
|
|||
|
|
}, 100);
|
|||
|
|
});
|
|||
|
|
},
|
|||
|
|
*/
|
|||
|
|
/**
|
|||
|
|
* 生成视频封面图片（不兼容iOS）
|
|||
|
|
* @property {String} videoUrl 视频地址
|
|||
|
|
* @returns {Promise} 视频封面图片 注意异步处理
|
|||
|
|
*/
|
|||
|
|
async generateVideoThumbnail(videoUrl) {
|
|||
|
|
// 绘制播放按钮图标
|
|||
|
|
// @param {CanvasContext} context canvas上下文
|
|||
|
|
// @param {Canvas} canvas
|
|||
|
|
const drawPlayButton = (context, canvas) => {
|
|||
|
|
// 创建一个 <img> 元素来加载播放图标
|
|||
|
|
const img = new Image();
|
|||
|
|
img.src = config.video_playicon;
|
|||
|
|
|
|||
|
|
// 等待图像加载完成
|
|||
|
|
return new Promise((resolve, reject) => {
|
|||
|
|
img.onload = () => {
|
|||
|
|
// 计算播放按钮的位置和大小
|
|||
|
|
// const playButtonSize = Math.min(canvas.width, canvas.height) * 0.15;
|
|||
|
|
const playButtonSize = canvas.width * 0.15;
|
|||
|
|
const playButtonX = (canvas.width - playButtonSize) / 2;
|
|||
|
|
const playButtonY = (canvas.height - playButtonSize) / 2;
|
|||
|
|
|
|||
|
|
// 绘制播放按钮到 canvas
|
|||
|
|
context.drawImage(img, playButtonX, playButtonY, playButtonSize, playButtonSize);
|
|||
|
|
|
|||
|
|
resolve();
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
img.onerror = (error) => {
|
|||
|
|
reject(new Error('Failed to load SVG image.'));
|
|||
|
|
};
|
|||
|
|
});
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return new Promise(async (resolve, reject) => {
|
|||
|
|
try {
|
|||
|
|
// 创建一个新的 video 元素，并设置 crossOrigin 属性
|
|||
|
|
const video = document.createElement('video');
|
|||
|
|
video.crossOrigin = 'anonymous'; // 添加 crossOrigin 属性
|
|||
|
|
video.preload = 'metadata';
|
|||
|
|
video.src = videoUrl;
|
|||
|
|
|
|||
|
|
// 创建一个新的 canvas 元素
|
|||
|
|
const canvas = document.createElement('canvas');
|
|||
|
|
const context = canvas.getContext('2d');
|
|||
|
|
|
|||
|
|
// 监听视频加载元数据完成
|
|||
|
|
video.onloadedmetadata = async () => {
|
|||
|
|
// 设置 canvas 尺寸与视频相同
|
|||
|
|
canvas.width = video.videoWidth;
|
|||
|
|
canvas.height = video.videoHeight;
|
|||
|
|
|
|||
|
|
// 尝试绘制视频的第一帧到 canvas
|
|||
|
|
video.currentTime = 0; // 确保我们从视频的第一帧开始
|
|||
|
|
video.onseeked = async () => {
|
|||
|
|
try {
|
|||
|
|
context.drawImage(video, 0, 0, canvas.width, canvas.height);
|
|||
|
|
|
|||
|
|
// 绘制播放按钮
|
|||
|
|
await drawPlayButton(context, canvas);
|
|||
|
|
|
|||
|
|
// 将 canvas 内容转换为 Data URL
|
|||
|
|
// resolve(canvas.toDataURL('image/png')); // base64太长了，不建议使用
|
|||
|
|
|
|||
|
|
// 将 canvas 内容转换为 Blob 对象
|
|||
|
|
canvas.toBlob((blob) => {
|
|||
|
|
resolve(URL.createObjectURL(blob));
|
|||
|
|
}, 'image/png');
|
|||
|
|
|
|||
|
|
} catch (error) {
|
|||
|
|
reject(new Error('Failed to draw image to canvas.'));
|
|||
|
|
}
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
// 如果 seek 操作没有成功，尝试直接绘制当前帧
|
|||
|
|
setTimeout(async () => {
|
|||
|
|
if (!video.seeking) {
|
|||
|
|
try {
|
|||
|
|
context.drawImage(video, 0, 0, canvas.width, canvas.height);
|
|||
|
|
// 绘制播放按钮
|
|||
|
|
await drawPlayButton(context, canvas);
|
|||
|
|
|
|||
|
|
// 将 canvas 内容转换为 Data URL
|
|||
|
|
// resolve(canvas.toDataURL('image/png')); // base64太长了，不建议使用
|
|||
|
|
|
|||
|
|
// 将 canvas 内容转换为 Blob 对象
|
|||
|
|
canvas.toBlob((blob) => {
|
|||
|
|
resolve(URL.createObjectURL(blob));
|
|||
|
|
}, 'image/png');
|
|||
|
|
|
|||
|
|
} catch (error) {
|
|||
|
|
reject(new Error('Failed to draw image to canvas.'));
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}, 1000); // 等待1秒后尝试绘制，防止 seek 操作未完成
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
// 监听视频加载错误
|
|||
|
|
video.onerror = (error) => {
|
|||
|
|
// reject(new Error('Failed to load video or get metadata. PS: Maybe the browser cannot play videos.'));
|
|||
|
|
|
|||
|
|
// 不直接抛出错误，而是抛出一个默认的封面图片，但是需要加以警告提示
|
|||
|
|
console.warn('Failed to load video or get metadata. PS: Maybe the browser cannot play videos.');
|
|||
|
|
resolve(config.video_thumbnail);
|
|||
|
|
};
|
|||
|
|
} catch (error) {
|
|||
|
|
// reject(error);
|
|||
|
|
// 不直接抛出错误，而是抛出一个默认的封面图片，但是需要加以警告提示
|
|||
|
|
console.warn(error)
|
|||
|
|
resolve(config.video_thumbnail);
|
|||
|
|
}
|
|||
|
|
});
|
|||
|
|
},
|
|||
|
|
/**
|
|||
|
|
* 生成封面图片，OffscreenCanvas方式（不兼容iOS）
|
|||
|
|
* @param {Object} coverUrl 封面图片地址
|
|||
|
|
* @returns {Promise}
|
|||
|
|
*/
|
|||
|
|
async generateCoverThumbnail(coverUrl) {
|
|||
|
|
return new Promise((resolve, reject) => {
|
|||
|
|
|
|||
|
|
// 内联 Worker 代码
|
|||
|
|
const workerCode = `
|
|||
|
|
self.onmessage = async function(e) {
|
|||
|
|
const { imageUrl, iconBase64 } = e.data;
|
|||
|
|
|
|||
|
|
try {
|
|||
|
|
// 加载图片并创建 ImageBitmap
|
|||
|
|
let imgResponse = await fetch(imageUrl);
|
|||
|
|
if (!imgResponse.ok) {
|
|||
|
|
throw new Error(\`Failed to load image from \${imageUrl}: \${imgResponse.statusText}\`);
|
|||
|
|
}
|
|||
|
|
let imgBlob = await imgResponse.blob();
|
|||
|
|
let imgBitmap = await createImageBitmap(imgBlob);
|
|||
|
|
|
|||
|
|
// 创建 OffscreenCanvas 并绘制图片
|
|||
|
|
const offscreen = new OffscreenCanvas(imgBitmap.width, imgBitmap.height);
|
|||
|
|
const ctx = offscreen.getContext('2d');
|
|||
|
|
ctx.drawImage(imgBitmap, 0, 0);
|
|||
|
|
|
|||
|
|
// 加载图标并创建 ImageBitmap
|
|||
|
|
let iconResponse = await fetch(iconBase64);
|
|||
|
|
if (!iconResponse.ok) {
|
|||
|
|
throw new Error(\`Failed to load icon from \${iconBase64}: \${iconResponse.statusText}\`);
|
|||
|
|
}
|
|||
|
|
let iconBlob = await iconResponse.blob();
|
|||
|
|
let iconBitmap = await createImageBitmap(iconBlob);
|
|||
|
|
|
|||
|
|
// 计算图标的中心位置并绘制
|
|||
|
|
const x = (imgBitmap.width - iconBitmap.width) / 2;
|
|||
|
|
const y = (imgBitmap.height - iconBitmap.height) / 2;
|
|||
|
|
ctx.drawImage(iconBitmap, x, y);
|
|||
|
|
|
|||
|
|
// 获取处理后的图像数据
|
|||
|
|
const result = await offscreen.convertToBlob();
|
|||
|
|
|
|||
|
|
// 发送结果回主线程
|
|||
|
|
self.postMessage(result);
|
|||
|
|
} catch (error) {
|
|||
|
|
console.error('Error processing image:', error.message);
|
|||
|
|
self.postMessage({ error: error.message });
|
|||
|
|
}
|
|||
|
|
};
|
|||
|
|
`
|
|||
|
|
|
|||
|
|
// 创建 Blob
|
|||
|
|
const blob = new Blob([workerCode], { type: 'application/javascript' });
|
|||
|
|
|
|||
|
|
// 创建一个指向 Blob 的 URL
|
|||
|
|
const workerUrl = URL.createObjectURL(blob);
|
|||
|
|
|
|||
|
|
// 实例化 Worker
|
|||
|
|
const worker = new Worker(workerUrl);
|
|||
|
|
|
|||
|
|
// 监听来自 Worker 的消息
|
|||
|
|
worker.onmessage = (e) => {
|
|||
|
|
if (e.data instanceof Blob) {
|
|||
|
|
resolve(URL.createObjectURL(e.data));
|
|||
|
|
} else {
|
|||
|
|
console.warn(e.data.error);
|
|||
|
|
// 不直接抛出错误，而是抛出一个默认的封面图片，但是需要加以警告提示
|
|||
|
|
resolve(config.video_thumbnail);
|
|||
|
|
}
|
|||
|
|
worker.terminate(); // 处理完成后终止 worker
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
// 向 Worker 发送消息
|
|||
|
|
worker.postMessage({ imageUrl: coverUrl, iconBase64: config.video_playicon });
|
|||
|
|
});
|
|||
|
|
},
|
|||
|
|
/**
|
|||
|
|
* 生成封面图片，普通方式，可能影响性能（兼容iOS）
|
|||
|
|
* @param {Object} coverUrl 封面图片地址
|
|||
|
|
* @returns {Promise}
|
|||
|
|
*/
|
|||
|
|
async generateCoverThumbnailIOS(coverUrl){
|
|||
|
|
return new Promise(async (resolve, reject) => {
|
|||
|
|
try {
|
|||
|
|
// 创建 Image 对象并加载封面图片
|
|||
|
|
const img = new Image();
|
|||
|
|
img.src = coverUrl;
|
|||
|
|
await new Promise(resolve => img.onload = resolve);
|
|||
|
|
|
|||
|
|
// 创建 Canvas 并绘制封面图片
|
|||
|
|
const canvas = document.createElement('canvas');
|
|||
|
|
canvas.width = img.width;
|
|||
|
|
canvas.height = img.height;
|
|||
|
|
const ctx = canvas.getContext('2d');
|
|||
|
|
ctx.drawImage(img, 0, 0);
|
|||
|
|
|
|||
|
|
// 加载播放按钮图标并绘制
|
|||
|
|
const icon = new Image();
|
|||
|
|
icon.src = config.video_playicon; // 假设这是播放按钮图标的 URL
|
|||
|
|
await new Promise(resolve => icon.onload = resolve);
|
|||
|
|
|
|||
|
|
// 计算播放按钮的位置和大小
|
|||
|
|
// const playButtonSize = Math.min(canvas.width, canvas.height) * 0.15;
|
|||
|
|
const playButtonSize = canvas.width * 0.15;
|
|||
|
|
const playButtonX = (canvas.width - playButtonSize) / 2;
|
|||
|
|
const playButtonY = (canvas.height - playButtonSize) / 2;
|
|||
|
|
|
|||
|
|
// 确保播放按钮图标按比例缩放
|
|||
|
|
const iconAspectRatio = icon.width / icon.height;
|
|||
|
|
const iconWidth = playButtonSize;
|
|||
|
|
const iconHeight = iconWidth / iconAspectRatio;
|
|||
|
|
|
|||
|
|
// 绘制播放按钮图标到 Canvas
|
|||
|
|
ctx.drawImage(icon, playButtonX, playButtonY, iconWidth, iconHeight);
|
|||
|
|
|
|||
|
|
// 将 canvas 内容转换为 Blob 对象
|
|||
|
|
canvas.toBlob((blob) => {
|
|||
|
|
resolve(URL.createObjectURL(blob));
|
|||
|
|
}, 'image/png');
|
|||
|
|
|
|||
|
|
} catch (error) {
|
|||
|
|
// iOS Safari 的安全策略通常比其他浏览器更严格，本地file://协议也会导致跨域
|
|||
|
|
console.warn('iOS createCoverThumbnail error :', error);
|
|||
|
|
// reject(error);
|
|||
|
|
// 不直接抛出错误，而是抛出一个默认的封面图片，但是需要加以警告提示
|
|||
|
|
resolve(config.video_thumbnail);
|
|||
|
|
}
|
|||
|
|
})
|
|||
|
|
},
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
</script>
|