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https://gitee.com/ulthon/ulthon_information.git
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e9d839ae8a
fix(phone-image): 修复分页标记丢失bug，消除双数据源问题 - 新增 getContentHtml() 和 updateConfig() 引擎API - 保存逻辑改用引擎内部 content_html，不再从DOM读取 - doRender 改用 updateConfig，配置变更不重置内容 - loadFromHistory 改用 init+render 全量初始化 - PHP/JS 配置字段对齐（移除template/font，新增pageAlignments）
1496 lines
53 KiB
JavaScript
1496 lines
53 KiB
JavaScript
/**
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* PhoneImageEngine - 手机图片排版引擎
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*
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* 将文章HTML内容自动分页并渲染为手机尺寸图片
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* 依赖: jQuery, html2canvas (项目已有)
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*
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* 渲染宽度540px, html2canvas scale=2 输出1080px
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* 小红书: 540x720 (输出1080x1440)
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* 抖音: 540x960 (输出1080x1920)
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*/
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var PhoneImageEngine = (function () {
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// ===== 配置 =====
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var config = {
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size: 'xiaohongshu',
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fontSize: 14,
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watermark: '',
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pageAlignments: {}, // key=页码(1-based), value='top'|'center'
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sizes: {
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xiaohongshu: { width: 540, height: 720 },
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douyin: { width: 540, height: 960 }
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},
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contentPadding: 20
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};
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// ===== 文章数据 =====
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var postData = {
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id: 0,
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title: '',
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desc: '',
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coverText: '', // 封面文案
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content_html: '',
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poster: '',
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author_name: '',
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create_time: '',
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category_name: ''
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};
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// ===== 分页结果 =====
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var pages = [];
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// ===== 截图缓存 =====
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var convertedBlockCache = {}; // key: simpleHash(block.html), value: { imgHtml: '...' }
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/**
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* 简单字符串哈希 (djb2 变体)
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* @param {string} str
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* @returns {string} 哈希字符串
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*/
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function simpleHash(str) {
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var hash = 0;
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if (!str) return '0';
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for (var i = 0; i < str.length; i++) {
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var char = str.charCodeAt(i);
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hash = ((hash << 5) - hash) + char;
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hash = hash & hash; // 转32位整数
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}
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return '' + hash;
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}
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/**
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* 确保隐藏渲染区域存在
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*/
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function ensureStaging() {
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if ($('#render-staging').length === 0) {
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$('<div id="render-staging">').css({
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position: 'fixed',
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left: '-9999px',
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top: 0,
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visibility: 'hidden'
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}).appendTo('body');
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}
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}
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/**
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* 初始化引擎
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* @param {Object} options - {postId, title, desc, coverText, contentHtml, poster, authorName, createTime, categoryName}
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* @param {Object} userConfig - {size, fontSize, watermark}
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*/
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function init(options, userConfig) {
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postData.id = options.postId || 0;
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postData.title = options.title || '';
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postData.desc = options.desc || '';
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postData.coverText = options.coverText || '';
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postData.content_html = options.contentHtml || '';
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postData.poster = options.poster || '';
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postData.author_name = options.authorName || '';
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postData.create_time = options.createTime || '';
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postData.category_name = options.categoryName || '';
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if (userConfig) {
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$.extend(config, userConfig);
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}
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// 清空缓存，避免旧数据干扰
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convertedBlockCache = {};
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// 内容流事件委托（只绑定一次）
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$(document).off('click', '.break-inserter-btn');
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$(document).off('click', '.remove-break-btn');
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$(document).off('click', '.thumb-alignment-toggle');
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$(document).on('click', '.break-inserter-btn', function () {
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var afterIndex = parseInt($(this).parent().data('after-index'), 10);
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insertPageBreak(afterIndex);
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});
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$(document).on('click', '.remove-break-btn', function () {
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var index = parseInt($(this).data('index'), 10);
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removePageBreak(index);
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});
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$(document).on('click', '.thumb-alignment-toggle', function () {
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var pageNum = parseInt($(this).data('page-num'), 10);
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var currentAlign = (config.pageAlignments && config.pageAlignments[pageNum]) || 'top';
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var newAlign = currentAlign === 'top' ? 'center' : 'top';
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setPageAlignment(pageNum, newAlign);
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render();
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});
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}
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/**
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* 渲染排版预览 - 生成分页后的HTML
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* 管线: preprocess -> parse -> renderContentFlow -> measure -> paginate -> generate -> renderThumbnails
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* 带并发锁：防止多次 render 同时执行造成数据混乱
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* @returns {jQuery Deferred} resolves with pages array
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*/
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function render() {
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var deferred = $.Deferred();
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// 防止并发渲染
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if (render._locked) {
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// 标记有待处理的渲染请求，当前渲染完成后会自动重试
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render._pending = true;
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return deferred.reject('rendering').promise();
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}
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render._locked = true;
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pages = [];
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var sizeConfig = config.sizes[config.size] || config.sizes.xiaohongshu;
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var pageHeight = sizeConfig.height;
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var contentAreaHeight = pageHeight - (config.contentPadding * 2);
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var cleanHtml = preprocessContent(postData.content_html);
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var blocks = parseHtmlToBlocks(cleanHtml);
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// 动态设置字号CSS变量，让fontSize滑块真正生效
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var effectiveFontSize = parseInt(config.fontSize, 10) || 14;
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document.documentElement.style.setProperty('--pi-font-size-base', effectiveFontSize + 'px');
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// 缓存清理：如果缓存条目过多则清空，防止内存膨胀
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var cacheKeys = Object.keys(convertedBlockCache);
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if (cacheKeys.length > blocks.length * 3) {
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convertedBlockCache = {};
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}
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// 空内容检测：blocks 为空时直接提示，不进入渲染流程
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if (blocks.length === 0) {
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$('#paginated-preview').html('<div style="text-align:center;padding:60px 20px;color:#999;">文章正文内容为空</div>');
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render._locked = false;
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return deferred.resolve([]).promise();
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}
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// 先渲染内容流(DOM) - 用于实测高度
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renderContentFlow(blocks);
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// 等待一帧确保中间栏渲染完成
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requestAnimationFrame(function () {
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// 在中间栏中将表格和代码块截图转为图片
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convertFlowBlocksToImages(blocks).then(function () {
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// 再等一帧让替换后的img渲染
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requestAnimationFrame(function () {
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measureBlockHeights(blocks);
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// 封面页
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pages.push(generateCoverPage(sizeConfig));
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// 内容分页(使用实测高度)
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var contentPages = paginateContent(blocks, contentAreaHeight, sizeConfig);
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pages = pages.concat(contentPages);
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// 尾页
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pages.push(generateSummaryPage(sizeConfig, pages.length));
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// 两遍遍历: 现在知道了总页数, 给每页补上 N/M 页码
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var totalPages = pages.length;
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for (var i = 0; i < pages.length; i++) {
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if (pages[i].type === 'content') {
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// 在页脚中添加 N/M 格式页码
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pages[i].html = pages[i].html.replace(
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'<span>' + pages[i].pageNum + '</span>',
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'<span class="page-number-indicator">' + (i + 1) + '/' + totalPages + '</span>'
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);
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}
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}
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// 渲染缩略图（右侧）- 异步截图
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renderThumbnails(sizeConfig).then(function () {
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render._locked = false;
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// 如果渲染期间有新的渲染请求排队，自动触发
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if (render._pending) {
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render._pending = false;
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render().catch(function () {
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// 静默处理递归渲染失败
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});
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}
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deferred.resolve(pages);
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}).catch(function (err) {
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render._locked = false;
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deferred.reject(err);
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});
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});
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}).catch(function (err) {
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render._locked = false;
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deferred.reject(err);
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});
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});
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return deferred.promise();
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}
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/**
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* 预处理HTML内容
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*/
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function preprocessContent(html) {
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if (!html) return '';
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html = html.replace(/<script[^>]*>[\s\S]*?<\/script>/gi, '');
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html = html.replace(/<style[^>]*>[\s\S]*?<\/style>/gi, '');
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// 移除不支持的媒体标签
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html = html.replace(/<iframe[\s\S]*?<\/iframe>/gi, '[媒体内容]');
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html = html.replace(/<video[\s\S]*?<\/video>/gi, '[媒体内容]');
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html = html.replace(/<svg[\s\S]*?<\/svg>/gi, '');
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html = html.replace(/<embed[^>]*>/gi, '');
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html = html.replace(/<object[\s\S]*?<\/object>/gi, '');
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// 清除空段落
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html = html.replace(/<p[^>]*>\s*<\/p>/gi, '');
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// 处理图片: 保留原始尺寸到data属性, 强制 max-width:100%
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html = html.replace(/<img([^>]*?)>/gi, function (match, attrs) {
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// 移除内联style
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attrs = attrs.replace(/\s*style\s*=\s*"[^"]*"/gi, '');
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attrs = attrs.replace(/\s*style\s*=\s*'[^']*'/gi, '');
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// 提取原始width/height值, 保存到data属性
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var widthVal = '';
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var heightVal = '';
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var widthMatch = attrs.match(/\swidth\s*=\s*"([^"]*)"/i) ||
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attrs.match(/\swidth\s*=\s*'([^']*)'/i);
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var heightMatch = attrs.match(/\sheight\s*=\s*"([^"]*)"/i) ||
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attrs.match(/\sheight\s*=\s*'([^']*)'/i);
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if (widthMatch) widthVal = widthMatch[1];
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if (heightMatch) heightVal = heightMatch[1];
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// 移除原始width/height属性
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attrs = attrs.replace(/\s*width\s*=\s*"[^"]*"/gi, '');
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attrs = attrs.replace(/\s*width\s*=\s*'[^']*'/gi, '');
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attrs = attrs.replace(/\s*height\s*=\s*"[^"]*"/gi, '');
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attrs = attrs.replace(/\s*height\s*=\s*'[^']*'/gi, '');
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// 添加data属性保存原始尺寸(用于比例计算)
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if (widthVal) attrs += ' data-original-width="' + widthVal + '"';
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if (heightVal) attrs += ' data-original-height="' + heightVal + '"';
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return '<img' + attrs + ' style="max-width:100%;height:auto;display:block;margin:10px 0;">';
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});
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return html;
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}
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/**
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* 将HTML解析为块级元素数组
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* 每个块: { type, html, estimatedHeight }
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*/
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function parseHtmlToBlocks(html) {
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var blocks = [];
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if (!html) return blocks;
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var $temp = $('<div>').html(html);
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// 展平嵌套的包装元素 (div, section, article, main, header, footer)
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// 将其内部内容提取为直接子元素
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var wrapperTags = ['div', 'section', 'article', 'main', 'header', 'footer', 'span'];
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var changed = true;
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var maxIterations = 10;
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while (changed && maxIterations > 0) {
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changed = false;
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maxIterations--;
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$temp.children().each(function () {
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var $el = $(this);
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var tagName = $el.prop('tagName').toLowerCase();
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if ($.inArray(tagName, wrapperTags) !== -1) {
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// 将此包装元素的子内容替换自身
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var $children = $el.children();
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if ($children.length > 0) {
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$el.replaceWith($children);
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changed = true;
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}
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}
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});
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}
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var children = $temp.children();
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if (children.length === 0) {
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// 纯文本内容，按段落分割
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var text = $temp.text().trim();
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if (text) {
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var paragraphs = text.split(/\n\s*\n|\n/);
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for (var i = 0; i < paragraphs.length; i++) {
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var p = paragraphs[i].trim();
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if (p) {
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blocks.push({
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type: 'p',
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html: '<p>' + p + '</p>',
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estimatedHeight: estimateTextHeight(p, config.fontSize)
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});
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}
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}
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}
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return blocks;
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}
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children.each(function () {
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var $el = $(this);
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var tagName = $el.prop('tagName').toLowerCase();
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var block = {
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type: tagName,
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html: $el[0].outerHTML
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};
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switch (tagName) {
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case 'hr':
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block.type = 'page-break';
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block.html = '';
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block.estimatedHeight = 0;
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break;
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case 'h1':
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case 'h2':
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case 'h3':
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case 'h4':
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case 'h5':
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case 'h6':
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block.type = tagName;
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block.estimatedHeight = estimateHeadingHeight(tagName, $el.text());
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break;
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case 'table':
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block.type = 'table';
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block.html = $el[0].outerHTML;
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block.estimatedHeight = 0;
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block.needsMeasurement = true;
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break;
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case 'pre':
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block.type = 'pre';
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block.html = $el[0].outerHTML;
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block.estimatedHeight = 0;
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block.needsMeasurement = true;
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break;
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case 'img':
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// 尝试从data属性计算比例高度, 否则标记需要DOM测量
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var imgW = parseInt($el.attr('data-original-width'), 10);
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var imgH = parseInt($el.attr('data-original-height'), 10);
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if (imgW > 0 && imgH > 0) {
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var imgRatio = getContentWidth() / imgW;
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block.estimatedHeight = Math.round(imgH * imgRatio) + 20;
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} else {
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block.estimatedHeight = 0;
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block.needsMeasurement = true;
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}
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break;
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case 'ul':
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case 'ol':
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block.estimatedHeight = estimateListHeight($el);
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break;
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case 'blockquote':
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block.estimatedHeight = estimateBlockquoteHeight($el);
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break;
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case 'p':
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default:
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block.type = 'p';
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block.estimatedHeight = estimateTextHeight($el.text(), config.fontSize);
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break;
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}
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blocks.push(block);
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});
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return blocks;
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}
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// ===== 高度估算 =====
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/**
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* 获取内容区可用宽度 (540 - 40px padding)
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*/
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function getContentWidth() {
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return 500;
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}
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/**
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* 估算文本高度
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* @param {string} text
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* @param {number} fontSize
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* @returns {number} px
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*/
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function estimateTextHeight(text, fontSize) {
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var charCount = text.length;
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if (charCount === 0) return 0;
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var charsPerLine = Math.floor(getContentWidth() / (fontSize * 1.0));
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if (charsPerLine < 1) charsPerLine = 1;
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var lines = Math.ceil(charCount / charsPerLine);
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return lines * fontSize * 1.8 + 10; // 1.8行高 + 10px段落间距
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}
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|
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/**
|
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* 估算标题高度
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*/
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function estimateHeadingHeight(tag, text) {
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var sizeMap = { h1: 28, h2: 24, h3: 20, h4: 18, h5: 16, h6: 14 };
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var hSize = sizeMap[tag] || 20;
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var charsPerLine = Math.floor(getContentWidth() / (hSize * 1.0));
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if (charsPerLine < 1) charsPerLine = 1;
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var lines = Math.ceil(text.length / charsPerLine);
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return lines * hSize * 1.4 + 20; // heading行高1.4 + 20px上下间距
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}
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|
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/**
|
||
* 估算列表高度
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*/
|
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function estimateListHeight($list) {
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var items = $list.find('li').length;
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return items * (config.fontSize * 1.8 + 5) + 15;
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}
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|
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/**
|
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* 估算引用块高度
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*/
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function estimateBlockquoteHeight($bq) {
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var text = $bq.text();
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return estimateTextHeight(text, config.fontSize) + 10;
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}
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|
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// ===== 分页核心算法 =====
|
||
|
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/**
|
||
* 将块级元素按高度累加，超过可用高度时分页
|
||
* 支持 <hr> 强制分页和超大块拆分（超长文本拆成多段）
|
||
*/
|
||
function paginateContent(blocks, contentAreaHeight, sizeConfig) {
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||
var contentPages = [];
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||
var currentPageBlocks = [];
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||
var currentHeight = 0;
|
||
var pageNumber = 1;
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|
||
for (var i = 0; i < blocks.length; i++) {
|
||
var block = blocks[i];
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|
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// 强制分页标记
|
||
if (block.type === 'page-break') {
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||
// 结束当前页
|
||
if (currentPageBlocks.length > 0) {
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||
contentPages.push(generateContentPage(
|
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currentPageBlocks, pageNumber, sizeConfig, false
|
||
));
|
||
currentPageBlocks = [];
|
||
currentHeight = 0;
|
||
pageNumber++;
|
||
}
|
||
continue; // 跳过这个 page-break 块本身
|
||
}
|
||
|
||
// 超大块处理：单个块超过整页高度时需要拆分
|
||
if (block.estimatedHeight > contentAreaHeight) {
|
||
// 先把当前页已有的内容推出去
|
||
if (currentPageBlocks.length > 0) {
|
||
contentPages.push(generateContentPage(
|
||
currentPageBlocks, pageNumber, sizeConfig, false
|
||
));
|
||
currentPageBlocks = [];
|
||
currentHeight = 0;
|
||
pageNumber++;
|
||
}
|
||
|
||
// 尝试拆分超大块
|
||
var splitBlocks = splitOversizedBlock(block, contentAreaHeight);
|
||
for (var s = 0; s < splitBlocks.length; s++) {
|
||
var sb = splitBlocks[s];
|
||
if (currentHeight + sb.estimatedHeight > contentAreaHeight && currentPageBlocks.length > 0) {
|
||
contentPages.push(generateContentPage(
|
||
currentPageBlocks, pageNumber, sizeConfig, false
|
||
));
|
||
currentPageBlocks = [];
|
||
currentHeight = 0;
|
||
pageNumber++;
|
||
}
|
||
currentPageBlocks.push(sb);
|
||
currentHeight += sb.estimatedHeight;
|
||
}
|
||
continue;
|
||
}
|
||
|
||
// 正常块：判断是否需要换页
|
||
if (currentHeight + block.estimatedHeight > contentAreaHeight && currentPageBlocks.length > 0) {
|
||
contentPages.push(generateContentPage(
|
||
currentPageBlocks, pageNumber, sizeConfig, false
|
||
));
|
||
currentPageBlocks = [];
|
||
currentHeight = 0;
|
||
pageNumber++;
|
||
}
|
||
|
||
currentPageBlocks.push(block);
|
||
currentHeight += block.estimatedHeight;
|
||
}
|
||
|
||
// 最后一页
|
||
if (currentPageBlocks.length > 0) {
|
||
contentPages.push(generateContentPage(
|
||
currentPageBlocks, pageNumber, sizeConfig, true
|
||
));
|
||
}
|
||
|
||
return contentPages;
|
||
}
|
||
|
||
/**
|
||
* 拆分超大块（超长段落文本拆成多段）
|
||
* @param {Object} block - 块级元素
|
||
* @param {number} pageHeight - 可用内容高度
|
||
* @returns {Array} 拆分后的块数组
|
||
*/
|
||
function splitOversizedBlock(block, pageHeight) {
|
||
// 图片块不拆分，保留原样（会被截断但保持完整）
|
||
if (block.type === 'img') {
|
||
return [block];
|
||
}
|
||
|
||
// 表格块不拆分，保留原样
|
||
if (block.type === 'table') {
|
||
return [block];
|
||
}
|
||
|
||
// 代码块不拆分，保留原样
|
||
if (block.type === 'pre') {
|
||
return [block];
|
||
}
|
||
|
||
// 文本类块：按句子拆分
|
||
var text = '';
|
||
var wrapperTag = 'p';
|
||
if (block.type === 'blockquote') {
|
||
text = $(block.html).text();
|
||
wrapperTag = 'blockquote';
|
||
} else {
|
||
text = $(block.html).text();
|
||
}
|
||
|
||
if (!text || text.length === 0) {
|
||
return [block];
|
||
}
|
||
|
||
// 按句子拆分：句号、问号、叹号、换行（兼容不支持 lookbehind 的浏览器）
|
||
var effectiveFontSize = parseInt(config.fontSize, 10) || 14;
|
||
var parts = text.split(/([。！？\n])/);
|
||
var sentences = [];
|
||
var current = '';
|
||
for (var si = 0; si < parts.length; si++) {
|
||
current += parts[si];
|
||
if (/[。！？\n]/.test(parts[si]) && current.length > 0) {
|
||
sentences.push(current);
|
||
current = '';
|
||
}
|
||
}
|
||
if (current) sentences.push(current);
|
||
|
||
if (sentences.length <= 1) {
|
||
// 无法按句子拆分，按固定字符数拆分
|
||
sentences = [];
|
||
var chunkSize = Math.floor(getContentWidth() / effectiveFontSize) *
|
||
Math.floor(pageHeight / (effectiveFontSize * 1.8));
|
||
if (chunkSize < 10) chunkSize = 10;
|
||
for (var ci = 0; ci < text.length; ci += chunkSize) {
|
||
sentences.push(text.substring(ci, ci + chunkSize));
|
||
}
|
||
}
|
||
|
||
var result = [];
|
||
for (var j = 0; j < sentences.length; j++) {
|
||
var s = sentences[j].trim();
|
||
if (!s) continue;
|
||
var h = estimateTextHeight(s, effectiveFontSize);
|
||
result.push({
|
||
type: wrapperTag === 'blockquote' ? 'blockquote' : 'p',
|
||
html: '<' + wrapperTag + '>' + s + '</' + wrapperTag + '>',
|
||
estimatedHeight: h
|
||
});
|
||
}
|
||
|
||
return result.length > 0 ? result : [block];
|
||
}
|
||
|
||
// ===== 页面HTML生成 =====
|
||
|
||
/**
|
||
* 检查是否有有效的封面图（排除默认头像占位图）
|
||
*/
|
||
function hasValidPoster() {
|
||
if (!postData.poster) return false;
|
||
// 排除默认头像占位图
|
||
var defaultPatterns = ['/static/images/avatar.png', '/static/images/avatar.jpeg', '/static/images/avatar.jpg'];
|
||
for (var i = 0; i < defaultPatterns.length; i++) {
|
||
if (postData.poster.indexOf(defaultPatterns[i]) !== -1) return false;
|
||
}
|
||
return true;
|
||
}
|
||
|
||
/**
|
||
* 生成封面页HTML
|
||
*/
|
||
function generateCoverPage(sizeConfig) {
|
||
var hasCover = hasValidPoster();
|
||
var html = '<div class="phone-image-page page-cover';
|
||
if (hasCover) {
|
||
html += ' has-cover-image';
|
||
} else {
|
||
html += ' no-cover-image';
|
||
}
|
||
html += '" style="width:' + sizeConfig.width + 'px;height:' + sizeConfig.height + 'px;">';
|
||
|
||
if (hasCover) {
|
||
html += '<img class="cover-image" src="' + escapeHtml(postData.poster) + '" alt="" onerror="this.style.display=\'none\'">';
|
||
html += '<div class="cover-title">' + escapeHtml(postData.title) + '</div>';
|
||
if (postData.desc) {
|
||
html += '<div class="cover-subtitle">' + escapeHtml(postData.desc) + '</div>';
|
||
}
|
||
// 封面文案（有封面图）
|
||
if (postData.coverText) {
|
||
html += '<div style="font-size:14px;color:#1890ff;margin-top:8px;">' + escapeHtml(postData.coverText) + '</div>';
|
||
}
|
||
html += '<div class="cover-meta">';
|
||
if (postData.category_name) {
|
||
html += escapeHtml(postData.category_name) + ' | ';
|
||
}
|
||
if (postData.author_name) {
|
||
html += escapeHtml(postData.author_name) + ' | ';
|
||
}
|
||
if (postData.create_time) {
|
||
html += postData.create_time;
|
||
}
|
||
html += '</div>';
|
||
} else {
|
||
// 无封面图: 大标题+摘要+装饰线条排版
|
||
html += '<div class="cover-decor-line cover-decor-top"></div>';
|
||
html += '<div class="cover-no-img-content">';
|
||
html += '<div class="cover-no-img-title">' + escapeHtml(postData.title) + '</div>';
|
||
html += '<div class="cover-decor-divider"></div>';
|
||
if (postData.desc) {
|
||
html += '<div class="cover-no-img-desc">' + escapeHtml(postData.desc) + '</div>';
|
||
}
|
||
// 封面文案（无封面图）
|
||
if (postData.coverText) {
|
||
html += '<div style="font-size:14px;color:#1890ff;margin-top:10px;padding:0 30px;word-break:break-word;">' + escapeHtml(postData.coverText) + '</div>';
|
||
}
|
||
html += '<div class="cover-no-img-meta">';
|
||
if (postData.category_name) {
|
||
html += '<span>' + escapeHtml(postData.category_name) + '</span>';
|
||
}
|
||
if (postData.author_name) {
|
||
html += '<span>' + escapeHtml(postData.author_name) + '</span>';
|
||
}
|
||
if (postData.create_time) {
|
||
html += '<span>' + postData.create_time + '</span>';
|
||
}
|
||
html += '</div>';
|
||
html += '</div>';
|
||
html += '<div class="cover-decor-line cover-decor-bottom"></div>';
|
||
}
|
||
|
||
// 水印
|
||
if (config.watermark) {
|
||
html += '<div class="page-watermark">' + escapeHtml(config.watermark) + '</div>';
|
||
}
|
||
|
||
html += '</div>';
|
||
|
||
return { type: 'cover', html: html };
|
||
}
|
||
|
||
/**
|
||
* 生成内容页HTML（含逐页对齐支持）
|
||
*/
|
||
function generateContentPage(blocks, pageNum, sizeConfig, isLast) {
|
||
// 读取逐页对齐配置
|
||
var alignment = (config.pageAlignments && config.pageAlignments[pageNum]) || 'top';
|
||
var valignClass = alignment === 'center' ? ' valign-center' : '';
|
||
|
||
var html = '<div class="phone-image-page page-body' + valignClass + '" style="width:' +
|
||
sizeConfig.width + 'px;height:' + sizeConfig.height + 'px;">';
|
||
|
||
// 页头（仅第一页内容页显示标题）
|
||
if (pageNum === 1) {
|
||
html += '<div class="page-header">';
|
||
html += '<div class="page-title">' + escapeHtml(postData.title) + '</div>';
|
||
html += '</div>';
|
||
}
|
||
|
||
// 正文内容区
|
||
html += '<div class="page-content">';
|
||
for (var i = 0; i < blocks.length; i++) {
|
||
html += blocks[i].html;
|
||
}
|
||
html += '</div>';
|
||
|
||
// 页脚 - 占位，render() 中会替换页码
|
||
html += '<div class="page-footer">';
|
||
html += '<span>' + escapeHtml(postData.author_name || '') + '</span>';
|
||
html += '<span>' + pageNum + '</span>';
|
||
html += '</div>';
|
||
|
||
// 水印
|
||
if (config.watermark) {
|
||
html += '<div class="page-watermark">' + escapeHtml(config.watermark) + '</div>';
|
||
}
|
||
|
||
html += '</div>';
|
||
return { type: 'content', html: html, pageNum: pageNum };
|
||
}
|
||
|
||
/**
|
||
* 生成尾页/总结页HTML
|
||
*/
|
||
function generateSummaryPage(sizeConfig, totalPages) {
|
||
var html = '<div class="phone-image-page page-summary" style="width:' +
|
||
sizeConfig.width + 'px;height:' + sizeConfig.height + 'px;">';
|
||
html += '<div class="summary-title">感谢阅读</div>';
|
||
html += '<div class="summary-text">' + escapeHtml(postData.title) + '</div>';
|
||
|
||
if (postData.desc) {
|
||
html += '<div class="summary-text" style="font-size:12px;">' + escapeHtml(postData.desc) + '</div>';
|
||
}
|
||
|
||
html += '<div class="summary-footer">';
|
||
html += '共 ' + totalPages + ' 页';
|
||
if (postData.author_name) {
|
||
html += ' | ' + escapeHtml(postData.author_name);
|
||
}
|
||
html += '</div>';
|
||
|
||
// 水印
|
||
if (config.watermark) {
|
||
html += '<div class="page-watermark">' + escapeHtml(config.watermark) + '</div>';
|
||
}
|
||
|
||
html += '</div>';
|
||
|
||
return { type: 'summary', html: html };
|
||
}
|
||
|
||
// ===== 纯图片页优化 =====
|
||
|
||
/**
|
||
* 检测staging区域中的页面元素是否为纯图片页
|
||
* 纯图片页: .page-body 内 .page-content 只含1个img且无文字内容
|
||
* @param {jQuery} $pageElem - .phone-image-page 元素
|
||
* @returns {boolean}
|
||
*/
|
||
function isPureImagePage($pageElem) {
|
||
// 仅内容页
|
||
if (!$pageElem.hasClass('page-body')) return false;
|
||
var $content = $pageElem.find('.page-content');
|
||
if (!$content.length) return false;
|
||
|
||
// 检查是否有文字内容（排除纯空白文本节点）
|
||
var textContent = $content.text().replace(/\s/g, '');
|
||
if (textContent.length > 0) return false;
|
||
|
||
// 检查img数量: 必须恰好1个img
|
||
var $imgs = $content.find('img');
|
||
if ($imgs.length !== 1) return false;
|
||
|
||
// 跳过由表格/代码块转换而来的图片（不应被当作纯图片页处理）
|
||
if ($imgs.first().attr('data-converted') === 'true') return false;
|
||
|
||
// img必须有有效src
|
||
var src = $imgs.first().attr('src');
|
||
return src && src.length > 0;
|
||
}
|
||
|
||
/**
|
||
* 从纯图片页元素中获取img的src
|
||
* @param {jQuery} $pageElem
|
||
* @returns {string}
|
||
*/
|
||
function getPureImageSrc($pageElem) {
|
||
var $img = $pageElem.find('.page-content img').first();
|
||
return $img.attr('src') || '';
|
||
}
|
||
|
||
/**
|
||
* 将原始图片绘制到canvas（用于高质量保存路径）
|
||
* @param {string} src - 图片src
|
||
* @param {number} width - 目标宽度
|
||
* @param {number} height - 目标高度
|
||
* @returns {jQuery Deferred} resolves with canvas
|
||
*/
|
||
function renderPureImageToCanvas(src, width, height) {
|
||
var deferred = $.Deferred();
|
||
var img = new Image();
|
||
img.crossOrigin = 'anonymous';
|
||
img.onload = function () {
|
||
if (img.naturalWidth === 0 || img.naturalHeight === 0) {
|
||
deferred.reject('Image has zero dimensions');
|
||
return;
|
||
}
|
||
var canvas = document.createElement('canvas');
|
||
canvas.width = width * 2; // scale:2 高质量
|
||
canvas.height = height * 2;
|
||
var ctx = canvas.getContext('2d');
|
||
// 白色背景
|
||
ctx.fillStyle = '#ffffff';
|
||
ctx.fillRect(0, 0, canvas.width, canvas.height);
|
||
// 缩放绘制
|
||
ctx.drawImage(img, 0, 0, canvas.width, canvas.height);
|
||
deferred.resolve(canvas);
|
||
};
|
||
img.onerror = function () {
|
||
deferred.reject('Image load failed');
|
||
};
|
||
img.src = src;
|
||
return deferred.promise();
|
||
}
|
||
|
||
/**
|
||
* 共享截图核心逻辑 - 将pages渲染到staging并逐页截图
|
||
* @param {Object} opts - { scale, outputCanvas, quality, sizeConfig }
|
||
* scale: html2canvas缩放 (1=缩略图, 2=保存)
|
||
* outputCanvas: true=输出canvas对象, false=输出dataURL字符串
|
||
* quality: JPEG质量 (0-1)
|
||
* sizeConfig: 尺寸配置(用于纯图片页canvas渲染)
|
||
* @returns {jQuery Deferred} resolves with array of dataURL strings or canvas objects
|
||
*/
|
||
function doCapturePages(opts) {
|
||
var deferred = $.Deferred();
|
||
ensureStaging();
|
||
|
||
var $staging = $('#render-staging');
|
||
$staging.empty();
|
||
|
||
// 渲染所有页面到隐藏区域
|
||
var sizeClass = 'size-' + config.size;
|
||
var $wrapper = $('<div class="phone-image-container ' + sizeClass + '">');
|
||
for (var i = 0; i < pages.length; i++) {
|
||
$wrapper.append(pages[i].html);
|
||
}
|
||
$staging.append($wrapper);
|
||
|
||
// 等待字体和DOM就绪
|
||
var fontsReady = (typeof document.fonts !== 'undefined' && document.fonts.ready)
|
||
? document.fonts.ready
|
||
: $.Deferred().resolve().promise();
|
||
|
||
fontsReady.catch(function () {
|
||
// 字体加载失败不影响截图，继续执行
|
||
}).then(function () {
|
||
requestAnimationFrame(function () {
|
||
// html2canvas会跳过visibility:hidden的元素，临时切换为可见
|
||
$staging.css({ visibility: 'visible' });
|
||
// 表格和代码块已在中间栏中转为图片，无需再次转换
|
||
runCaptureLoop($staging, opts, deferred);
|
||
});
|
||
});
|
||
|
||
return deferred.promise();
|
||
}
|
||
|
||
/**
|
||
* 执行串行截图循环
|
||
* @param {jQuery} $staging - staging元素
|
||
* @param {Object} opts - 截图选项
|
||
* @param {jQuery Deferred} deferred - 外部deferred
|
||
*/
|
||
function runCaptureLoop($staging, opts, deferred) {
|
||
var $pageElems = $staging.find('.phone-image-page');
|
||
if ($pageElems.length === 0) {
|
||
$staging.css({ visibility: 'hidden' });
|
||
if (opts.outputCanvas) {
|
||
deferred.reject('没有可渲染的页面');
|
||
} else {
|
||
deferred.resolve([]);
|
||
}
|
||
return;
|
||
}
|
||
|
||
var results = [];
|
||
var idx = 0;
|
||
var total = $pageElems.length;
|
||
|
||
function captureNext() {
|
||
if (idx >= total) {
|
||
$staging.empty();
|
||
$staging.css({ visibility: 'hidden' });
|
||
deferred.resolve(results);
|
||
return;
|
||
}
|
||
|
||
var $elem = $pageElems.eq(idx);
|
||
|
||
// 纯图片页优化
|
||
if (isPureImagePage($elem)) {
|
||
var pureSrc = getPureImageSrc($elem);
|
||
if (pureSrc) {
|
||
if (opts.outputCanvas) {
|
||
// 保存模式: 高质量绘制原图到canvas
|
||
renderPureImageToCanvas(pureSrc, opts.sizeConfig.width, opts.sizeConfig.height).then(function (canvas) {
|
||
results.push(canvas);
|
||
idx++;
|
||
captureNext();
|
||
}).catch(function () {
|
||
// 加载失败，回退到html2canvas
|
||
capturePageViaHtml2Canvas($elem, $staging, opts, results, deferred, function () { idx++; captureNext(); });
|
||
});
|
||
return;
|
||
} else {
|
||
// 缩略图模式: 直接用src
|
||
results.push(pureSrc);
|
||
idx++;
|
||
captureNext();
|
||
return;
|
||
}
|
||
}
|
||
}
|
||
|
||
capturePageViaHtml2Canvas($elem, $staging, opts, results, deferred, function () { idx++; captureNext(); });
|
||
}
|
||
|
||
captureNext();
|
||
}
|
||
|
||
/**
|
||
* 用html2canvas截图单页
|
||
*/
|
||
function capturePageViaHtml2Canvas($elem, $staging, opts, results, deferred, onDone) {
|
||
html2canvas($elem[0], {
|
||
scale: opts.scale,
|
||
useCORS: true,
|
||
backgroundColor: '#ffffff',
|
||
width: $elem.outerWidth(),
|
||
height: $elem.outerHeight(),
|
||
logging: false
|
||
}).then(function (canvas) {
|
||
if (opts.outputCanvas) {
|
||
results.push(canvas);
|
||
} else {
|
||
results.push(canvas.toDataURL('image/jpeg', opts.quality));
|
||
}
|
||
onDone();
|
||
}).catch(function (err) {
|
||
$staging.empty();
|
||
$staging.css({ visibility: 'hidden' });
|
||
deferred.reject('截图失败: ' + err);
|
||
});
|
||
}
|
||
|
||
/**
|
||
* 渲染到隐藏区域 -> 截图 -> 显示缩略图
|
||
* @param {Object} sizeConfig
|
||
* @returns {jQuery Deferred} resolves with pages array
|
||
*/
|
||
function renderThumbnails(sizeConfig) {
|
||
var deferred = $.Deferred();
|
||
|
||
doCapturePages({
|
||
scale: 1,
|
||
outputCanvas: false,
|
||
quality: 0.85,
|
||
sizeConfig: sizeConfig
|
||
}).then(function (dataUrls) {
|
||
displayThumbnails(dataUrls, sizeConfig);
|
||
deferred.resolve(pages);
|
||
}).catch(function (err) {
|
||
deferred.reject(err);
|
||
});
|
||
|
||
return deferred.promise();
|
||
}
|
||
|
||
/**
|
||
* 在右侧显示缩略图
|
||
* @param {Array} dataUrls - base64 图片数据
|
||
* @param {Object} sizeConfig
|
||
*/
|
||
function displayThumbnails(dataUrls, sizeConfig) {
|
||
var $preview = $('#paginated-preview');
|
||
if (!$preview.length) return;
|
||
|
||
$preview.empty();
|
||
if (dataUrls.length === 0) return;
|
||
|
||
// 计算缩放比例：缩略图高度 = 容器高度 - 40(页码标签) - 40(上下padding)
|
||
var containerHeight = $preview.parent().height() || 700;
|
||
var scaleRatio = (containerHeight - 80) / sizeConfig.height;
|
||
var thumbWidth = Math.round(sizeConfig.width * scaleRatio);
|
||
|
||
for (var i = 0; i < dataUrls.length; i++) {
|
||
var $item = $('<div class="preview-thumb-item" data-page-index="' + i + '">');
|
||
$item.css('width', thumbWidth + 'px');
|
||
|
||
var $img = $('<img>');
|
||
$img.attr('src', dataUrls[i]);
|
||
$img.css('width', thumbWidth + 'px');
|
||
$item.append($img);
|
||
|
||
// 页码
|
||
var $pageNum = $('<span class="preview-thumb-page-num">' + (i + 1) + '/' + dataUrls.length + '</span>');
|
||
$item.append($pageNum);
|
||
|
||
// 对齐按钮（仅内容页）
|
||
if (pages[i] && pages[i].type === 'content') {
|
||
var pageNum = pages[i].pageNum || (i);
|
||
var currentAlign = (config.pageAlignments && config.pageAlignments[pageNum]) || 'top';
|
||
var isActiveCenter = currentAlign === 'center';
|
||
var $toggle = $('<button class="thumb-alignment-toggle' + (isActiveCenter ? ' active-center' : '') + '" data-page-index="' + i + '" data-page-num="' + pageNum + '">' +
|
||
(isActiveCenter ? '\u2195' : '\u2191') +
|
||
'</button>');
|
||
$item.append($toggle);
|
||
}
|
||
|
||
$preview.append($item);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 将页面渲染到隐藏区域并高质量截图（用于保存）
|
||
* @returns {jQuery Deferred} resolves with canvas array
|
||
*/
|
||
function capturePagesFromStaging() {
|
||
var sizeConfig = config.sizes[config.size] || config.sizes.xiaohongshu;
|
||
return doCapturePages({
|
||
scale: 2,
|
||
outputCanvas: true,
|
||
quality: 0.92,
|
||
sizeConfig: sizeConfig
|
||
});
|
||
}
|
||
|
||
/**
|
||
* 在中间栏 #content-flow 中将表格和代码块截图转为图片
|
||
* 在 renderContentFlow(blocks) 之后、measureBlockHeights(blocks) 之前调用
|
||
* 使用 convertedBlockCache 缓存已转换的图片，仅对新增/变更的 block 执行截图
|
||
* @param {Array} blocks - parseHtmlToBlocks 返回的块数组
|
||
* @returns {jQuery Deferred} resolves with blocks array
|
||
*/
|
||
function convertFlowBlocksToImages(blocks) {
|
||
var deferred = $.Deferred();
|
||
var $flow = $('#content-flow');
|
||
var blocksToConvert = []; // 需要重新截图的 block 索引
|
||
|
||
// 第一遍：检查缓存，命中则直接复用
|
||
for (var i = 0; i < blocks.length; i++) {
|
||
if (blocks[i].type !== 'table' && blocks[i].type !== 'pre') continue;
|
||
|
||
var cacheKey = simpleHash(blocks[i].html);
|
||
if (convertedBlockCache[cacheKey]) {
|
||
// 命中缓存
|
||
blocks[i].html = convertedBlockCache[cacheKey].imgHtml;
|
||
blocks[i].type = 'img';
|
||
// 更新中间栏显示
|
||
var $cachedEl = $flow.find('.content-flow-block[data-index="' + i + '"]');
|
||
if ($cachedEl.length) $cachedEl.html(blocks[i].html);
|
||
} else {
|
||
blocksToConvert.push(i);
|
||
}
|
||
}
|
||
|
||
if (blocksToConvert.length === 0) {
|
||
deferred.resolve(blocks);
|
||
return deferred.promise();
|
||
}
|
||
|
||
// 第二遍：串行截图未缓存的 block
|
||
var convertIdx = 0;
|
||
|
||
function convertNext() {
|
||
if (convertIdx >= blocksToConvert.length) {
|
||
deferred.resolve(blocks);
|
||
return;
|
||
}
|
||
|
||
var blockIdx = blocksToConvert[convertIdx];
|
||
var block = blocks[blockIdx];
|
||
var $blockEl = $flow.find('.content-flow-block[data-index="' + blockIdx + '"]');
|
||
|
||
if (!$blockEl.length) {
|
||
convertIdx++;
|
||
convertNext();
|
||
return;
|
||
}
|
||
|
||
// 对代码块：先应用 Prism 高亮
|
||
if (block.type === 'pre' && typeof Prism !== 'undefined') {
|
||
$blockEl.find('pre > code:not([class*="language-"])').addClass('language-plaintext');
|
||
$blockEl.find('pre code').each(function () { Prism.highlightElement(this); });
|
||
}
|
||
|
||
html2canvas($blockEl[0], {
|
||
scale: 2,
|
||
useCORS: true,
|
||
backgroundColor: block.type === 'table' ? '#ffffff' : '#f5f5f5',
|
||
logging: false
|
||
}).then(function (canvas) {
|
||
var imgData = canvas.toDataURL('image/jpeg', 0.92);
|
||
var imgHtml = '<img src="' + imgData + '" data-converted="true" style="max-width:100%;height:auto;display:block;margin:10px 0;" />';
|
||
|
||
// 存入缓存（用截图前的原始HTML做key）
|
||
var originalHtml = block.html;
|
||
var cacheKey = simpleHash(originalHtml);
|
||
convertedBlockCache[cacheKey] = { imgHtml: imgHtml };
|
||
|
||
block.html = imgHtml;
|
||
block.type = 'img';
|
||
$blockEl.html(imgHtml);
|
||
|
||
convertIdx++;
|
||
convertNext();
|
||
}).catch(function () {
|
||
// 截图失败，保留原样
|
||
convertIdx++;
|
||
convertNext();
|
||
});
|
||
}
|
||
|
||
convertNext();
|
||
return deferred.promise();
|
||
}
|
||
|
||
/**
|
||
* DOM实测高度 - 从#content-flow中读取每个块的实际渲染高度
|
||
* @param {Array} blocks - parseHtmlToBlocks 返回的块数组
|
||
*/
|
||
function measureBlockHeights(blocks) {
|
||
var $flow = $('#content-flow');
|
||
if (!$flow.length) return;
|
||
|
||
for (var i = 0; i < blocks.length; i++) {
|
||
var block = blocks[i];
|
||
if (block.type === 'page-break') continue;
|
||
|
||
var $blockEl = $flow.find('.content-flow-block[data-index="' + i + '"]');
|
||
if ($blockEl.length) {
|
||
var actualHeight = Math.round($blockEl[0].getBoundingClientRect().height);
|
||
if (actualHeight > 0) {
|
||
block.estimatedHeight = actualHeight;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 渲染内容流到 #content-flow 容器
|
||
* @param {Array} blocks - parseHtmlToBlocks 返回的块数组
|
||
*/
|
||
function renderContentFlow(blocks) {
|
||
var $flow = $('#content-flow');
|
||
if (!$flow.length) return;
|
||
|
||
$flow.empty();
|
||
|
||
for (var i = 0; i < blocks.length; i++) {
|
||
var block = blocks[i];
|
||
|
||
// 分页标记
|
||
if (block.type === 'page-break') {
|
||
var $marker = $('<div class="page-break-marker">' +
|
||
'<span class="break-marker-label">-- 分页标记 --</span>' +
|
||
'<button class="remove-break-btn" data-index="' + i + '" title="删除分页">×</button>' +
|
||
'</div>');
|
||
$flow.append($marker);
|
||
continue;
|
||
}
|
||
|
||
// 内容块
|
||
var $block = $('<div class="content-flow-block" data-index="' + i + '">' + block.html + '</div>');
|
||
$flow.append($block);
|
||
|
||
// 块与块之间的分页插入区域（不在最后一个块之后添加）
|
||
if (i < blocks.length - 1) {
|
||
var $inserter = $('<div class="break-inserter" data-after-index="' + i + '">' +
|
||
'<button class="break-inserter-btn" title="插入分页">+</button>' +
|
||
'</div>');
|
||
$flow.append($inserter);
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 在指定位置插入分页标记
|
||
* 修改 postData.content_html，在对应位置插入 <hr>
|
||
* @param {number} blockIndex - 在哪个块之后插入 (对应 break-inserter 的 data-after-index)
|
||
*/
|
||
function insertPageBreak(blockIndex) {
|
||
// 如果正在渲染，延迟重试
|
||
if (render._locked) {
|
||
insertPageBreak._retryCount = (insertPageBreak._retryCount || 0) + 1;
|
||
if (insertPageBreak._retryCount >= 15) {
|
||
insertPageBreak._retryCount = 0;
|
||
layer.msg('操作超时，请重试');
|
||
return;
|
||
}
|
||
setTimeout(function () { insertPageBreak(blockIndex); }, 200);
|
||
return;
|
||
}
|
||
insertPageBreak._retryCount = 0;
|
||
|
||
var cleanHtml = preprocessContent(postData.content_html);
|
||
var $temp = $('<div>').html(cleanHtml);
|
||
var children = $temp.children();
|
||
|
||
// 在 blockIndex 位置的元素之后插入 <hr>
|
||
if (blockIndex >= 0 && blockIndex < children.length) {
|
||
$(children[blockIndex]).after('<hr>');
|
||
} else {
|
||
$temp.append('<hr>');
|
||
}
|
||
|
||
postData.content_html = $temp.html();
|
||
|
||
// 重新渲染
|
||
render();
|
||
}
|
||
|
||
/**
|
||
* 删除指定位置的分页标记
|
||
* @param {number} blockIndex - 分页标记的 data-index
|
||
*/
|
||
function removePageBreak(blockIndex) {
|
||
// 如果正在渲染，延迟重试
|
||
if (render._locked) {
|
||
removePageBreak._retryCount = (removePageBreak._retryCount || 0) + 1;
|
||
if (removePageBreak._retryCount >= 15) {
|
||
removePageBreak._retryCount = 0;
|
||
layer.msg('操作超时，请重试');
|
||
return;
|
||
}
|
||
setTimeout(function () { removePageBreak(blockIndex); }, 200);
|
||
return;
|
||
}
|
||
removePageBreak._retryCount = 0;
|
||
|
||
// 统计这是第几个 page-break
|
||
var cleanHtml = preprocessContent(postData.content_html);
|
||
var $temp = $('<div>').html(cleanHtml);
|
||
var hrElements = $temp.find('hr');
|
||
|
||
// 在 blocks 数组中找到这个 page-break 是第几个
|
||
var breakOrder = 0;
|
||
var currentBlocks = parseHtmlToBlocks(cleanHtml);
|
||
for (var i = 0; i < currentBlocks.length && i < blockIndex; i++) {
|
||
if (currentBlocks[i].type === 'page-break') breakOrder++;
|
||
}
|
||
|
||
if (breakOrder < hrElements.length) {
|
||
$(hrElements[breakOrder]).remove();
|
||
postData.content_html = $temp.html();
|
||
render();
|
||
}
|
||
}
|
||
|
||
// ===== 图片生成 =====
|
||
|
||
/**
|
||
* 逐页截图生成图片（使用隐藏渲染区域高质量截图）
|
||
* @param {Function} [onProgress] 进度回调 function(currentIndex, totalPages, canvas)
|
||
* @returns {Promise} jQuery Deferred, resolves with array of canvas objects
|
||
*/
|
||
function generateImages(onProgress) {
|
||
var deferred = $.Deferred();
|
||
|
||
if (pages.length === 0) {
|
||
deferred.reject('没有可渲染的页面');
|
||
return deferred.promise();
|
||
}
|
||
|
||
if (onProgress) onProgress(0, pages.length, null);
|
||
|
||
capturePagesFromStaging().then(function (canvases) {
|
||
if (onProgress) onProgress(canvases.length, canvases.length, null);
|
||
deferred.resolve(canvases);
|
||
}).catch(function (err) {
|
||
deferred.reject(err);
|
||
});
|
||
|
||
return deferred.promise();
|
||
}
|
||
|
||
/**
|
||
* 将canvas转为base64并保存到服务端
|
||
* @param {number} postId 文章ID
|
||
* @param {Object} saveConfig 配置信息
|
||
* @param {Function} [onProgress] 生成进度回调 function(current, total, canvas)
|
||
* @returns {Promise} jQuery Deferred
|
||
*/
|
||
function saveImages(postId, saveConfig, onProgress) {
|
||
var deferred = $.Deferred();
|
||
|
||
capturePagesFromStaging().then(function (canvases) {
|
||
if (onProgress) onProgress(canvases.length, canvases.length, null);
|
||
var pagesData = [];
|
||
for (var i = 0; i < canvases.length; i++) {
|
||
pagesData.push(canvases[i].toDataURL('image/jpeg', 0.92));
|
||
}
|
||
|
||
// 检查数据总大小，防止超大文章导致请求失败
|
||
var totalSize = 0;
|
||
for (var i = 0; i < pagesData.length; i++) {
|
||
if (pagesData[i]) {
|
||
totalSize += pagesData[i].length;
|
||
}
|
||
}
|
||
if (totalSize > 16 * 1024 * 1024) {
|
||
layer.msg('数据量过大（超过16MB），请减少内容或联系管理员');
|
||
deferred.reject('数据量过大（超过16MB）');
|
||
return;
|
||
}
|
||
|
||
$.ajax({
|
||
url: '/index.php/admin/post/savePostOutput',
|
||
type: 'POST',
|
||
data: JSON.stringify({
|
||
post_id: postId,
|
||
output_type: 'phone_image',
|
||
config: saveConfig || config,
|
||
content_html: postData.content_html,
|
||
pages: pagesData
|
||
}),
|
||
contentType: 'application/json',
|
||
success: function (result) {
|
||
if (result.code === 0) {
|
||
deferred.resolve(result.data);
|
||
} else {
|
||
deferred.reject(result.msg || '保存失败');
|
||
}
|
||
},
|
||
error: function (xhr) {
|
||
deferred.reject('网络错误: ' + xhr.statusText);
|
||
}
|
||
});
|
||
}).catch(function (err) {
|
||
deferred.reject(err);
|
||
});
|
||
|
||
return deferred.promise();
|
||
}
|
||
|
||
/**
|
||
* 保存排版配置到服务端（不生成图片）
|
||
* @param {number} postId 文章ID
|
||
* @param {Object} saveConfig 配置信息 {size, fontSize, watermark, content_html}
|
||
* @param {string} url 保存接口URL
|
||
* @returns {Promise} jQuery Deferred, resolves with {output_id}
|
||
*/
|
||
function saveConfig(postId, saveConfig, url) {
|
||
var deferred = $.Deferred();
|
||
|
||
var payload = {
|
||
post_id: postId,
|
||
output_type: 'phone_image',
|
||
config: {
|
||
size: saveConfig.size || config.size,
|
||
fontSize: saveConfig.fontSize || config.fontSize,
|
||
watermark: saveConfig.watermark || config.watermark,
|
||
pageAlignments: config.pageAlignments || {}
|
||
},
|
||
content_html: saveConfig.content_html || postData.content_html
|
||
};
|
||
|
||
$.ajax({
|
||
url: url || '',
|
||
type: 'POST',
|
||
data: JSON.stringify(payload),
|
||
contentType: 'application/json',
|
||
success: function (result) {
|
||
if (result.code === 0) {
|
||
deferred.resolve(result.data || {});
|
||
} else {
|
||
deferred.reject(result.msg || '保存失败');
|
||
}
|
||
},
|
||
error: function (xhr) {
|
||
deferred.reject('网络错误: ' + xhr.statusText);
|
||
}
|
||
});
|
||
|
||
return deferred.promise();
|
||
}
|
||
|
||
// ===== 逐页对齐 =====
|
||
|
||
/**
|
||
* 设置指定页的对齐方式
|
||
* @param {number} pageNum 页码(1-based)
|
||
* @param {string} align 'top'|'center'
|
||
*/
|
||
function setPageAlignment(pageNum, align) {
|
||
if (!config.pageAlignments) {
|
||
config.pageAlignments = {};
|
||
}
|
||
config.pageAlignments[pageNum] = align;
|
||
}
|
||
|
||
/**
|
||
* 导出内容流为长图
|
||
*/
|
||
function exportLongImage() {
|
||
var deferred = $.Deferred();
|
||
|
||
if (render._locked) {
|
||
layer.msg('请等待渲染完成');
|
||
deferred.reject('rendering');
|
||
return deferred.promise();
|
||
}
|
||
|
||
var $flow = $('#content-flow');
|
||
if (!$flow.length) {
|
||
deferred.reject('内容流容器不存在');
|
||
return deferred.promise();
|
||
}
|
||
|
||
// 临时隐藏交互元素
|
||
$flow.find('.break-inserter').hide();
|
||
$flow.find('.page-break-marker').hide();
|
||
|
||
// 获取内容流的实际高度
|
||
var flowWidth = $flow.outerWidth();
|
||
var flowHeight = $flow[0].scrollHeight;
|
||
|
||
html2canvas($flow[0], {
|
||
scale: 2,
|
||
useCORS: true,
|
||
backgroundColor: '#ffffff',
|
||
width: flowWidth,
|
||
height: flowHeight,
|
||
logging: false
|
||
}).then(function (canvas) {
|
||
// 恢复交互元素
|
||
$flow.find('.break-inserter').show();
|
||
$flow.find('.page-break-marker').show();
|
||
|
||
// 触发下载
|
||
var link = document.createElement('a');
|
||
link.download = 'phone-image-long-' + Date.now() + '.png';
|
||
link.href = canvas.toDataURL('image/png');
|
||
link.click();
|
||
|
||
deferred.resolve(canvas);
|
||
}).catch(function (err) {
|
||
// 恢复交互元素
|
||
$flow.find('.break-inserter').show();
|
||
$flow.find('.page-break-marker').show();
|
||
deferred.reject('长图导出失败: ' + err);
|
||
});
|
||
|
||
return deferred.promise();
|
||
}
|
||
|
||
// ===== 工具方法 =====
|
||
|
||
/**
|
||
* HTML转义
|
||
*/
|
||
function escapeHtml(text) {
|
||
if (!text) return '';
|
||
var div = document.createElement('div');
|
||
div.appendChild(document.createTextNode(text));
|
||
return div.innerHTML;
|
||
}
|
||
|
||
// ===== 公开API =====
|
||
return {
|
||
init: init,
|
||
render: render,
|
||
generateImages: generateImages,
|
||
saveImages: saveImages,
|
||
saveConfig: saveConfig,
|
||
setPageAlignment: setPageAlignment,
|
||
insertPageBreak: insertPageBreak,
|
||
removePageBreak: removePageBreak,
|
||
getContentHtml: function () {
|
||
return postData.content_html;
|
||
},
|
||
updateConfig: function (newConfig) {
|
||
if (newConfig) {
|
||
$.extend(config, newConfig);
|
||
}
|
||
},
|
||
exportLongImage: exportLongImage
|
||
};
|
||
})();
|