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83a2bd48a2
- 新增手机图片排版功能，支持小红书/抖音尺寸输出 - 新增AI智能排版顾问，支持内容分析与优化推荐 - 新增AI供应商管理，支持多渠道配置与同步 - 新增文章输出管理页面，支持图片预览与批量下载 - 新增字体文件与排版样式配置
737 lines
23 KiB
JavaScript
737 lines
23 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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template: 'minimal',
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size: 'xiaohongshu',
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font: 'source-han-sans',
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fontSize: 14,
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watermark: '',
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// 尺寸映射 (渲染尺寸, 实际输出是2倍)
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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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// 字体映射
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fonts: {
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'source-han-sans': "'Source Han Sans', 'SourceHanSans-Normal', sans-serif",
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'alibaba-puhuiti': "'AlibabaPuHuiTi', sans-serif",
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'lxgw-wenkai': "'LXGWWenKai', cursive"
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},
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// 页面内容边距
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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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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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// ===== DOM引用 =====
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var $container = null;
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/**
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* 初始化引擎
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* @param {Object} options - {postId, title, desc, contentHtml, poster, authorName, createTime, categoryName}
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* @param {Object} userConfig - {template, size, font, fontSize, watermark}
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*/
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function init(options, userConfig) {
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postData.id = options.postId || 0;
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postData.title = options.title || '';
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postData.desc = options.desc || '';
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postData.content_html = options.contentHtml || '';
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postData.poster = options.poster || '';
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postData.author_name = options.authorName || '';
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postData.create_time = options.createTime || '';
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postData.category_name = options.categoryName || '';
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if (userConfig) {
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$.extend(config, userConfig);
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}
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$container = $('#phone-image-container');
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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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* @returns {Array} 页面数组，每项是 { type, html, pageNum }
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*/
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function render() {
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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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// 内容预处理
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var cleanHtml = preprocessContent(postData.content_html);
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// 解析为块级元素
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var blocks = parseHtmlToBlocks(cleanHtml);
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// 生成封面页
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pages.push(generateCoverPage(sizeConfig));
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// 内容分页
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var contentPages = paginateContent(blocks, contentAreaHeight, sizeConfig);
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pages = pages.concat(contentPages);
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// 生成尾页
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pages.push(generateSummaryPage(sizeConfig, pages.length));
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// 渲染到DOM
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renderToDOM(sizeConfig);
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return pages;
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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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// 清除空段落
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html = html.replace(/<p[^>]*>\s*<\/p>/gi, '');
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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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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 '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.estimatedHeight = estimateHeadingHeight(tagName, $el.text());
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break;
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case 'img':
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block.estimatedHeight = estimateImageHeight($el);
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block.$img = $el;
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break;
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case 'ul':
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case 'ol':
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block.estimatedHeight = estimateListHeight($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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* 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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* 估算图片高度
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* 默认按内容区宽度的60%估算
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*/
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function estimateImageHeight($img) {
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var w = parseInt($img.attr('width'), 10);
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var h = parseInt($img.attr('height'), 10);
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if (w > 0 && h > 0) {
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// 按比例缩放到内容宽度
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var ratio = getContentWidth() / w;
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return Math.round(h * ratio) + 10;
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}
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// 无尺寸信息时默认300px
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return 310;
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}
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/**
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* 估算列表高度
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*/
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function estimateListHeight($list) {
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var items = $list.find('li').length;
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return items * (config.fontSize * 1.8 + 5) + 15;
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}
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/**
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* 估算引用块高度
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*/
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function estimateBlockquoteHeight($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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// ===== 分页核心算法 =====
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/**
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* 将块级元素按高度累加，超过可用高度时分页
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* 支持超大块拆分（超长文本拆成多段）
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*/
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function paginateContent(blocks, contentAreaHeight, sizeConfig) {
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var contentPages = [];
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var currentPageBlocks = [];
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var currentHeight = 0;
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var pageNumber = 1;
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for (var i = 0; i < blocks.length; i++) {
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var block = blocks[i];
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// 超大块处理：单个块超过整页高度时需要拆分
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if (block.estimatedHeight > contentAreaHeight) {
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// 先把当前页已有的内容推出去
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if (currentPageBlocks.length > 0) {
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contentPages.push(generateContentPage(
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currentPageBlocks, pageNumber, sizeConfig, false
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));
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currentPageBlocks = [];
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currentHeight = 0;
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pageNumber++;
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}
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// 尝试拆分超大块
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var splitBlocks = splitOversizedBlock(block, contentAreaHeight);
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for (var s = 0; s < splitBlocks.length; s++) {
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var sb = splitBlocks[s];
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if (currentHeight + sb.estimatedHeight > contentAreaHeight && currentPageBlocks.length > 0) {
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contentPages.push(generateContentPage(
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currentPageBlocks, pageNumber, sizeConfig, false
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));
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currentPageBlocks = [];
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currentHeight = 0;
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pageNumber++;
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}
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currentPageBlocks.push(sb);
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currentHeight += sb.estimatedHeight;
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}
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continue;
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}
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// 正常块：判断是否需要换页
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if (currentHeight + block.estimatedHeight > contentAreaHeight && currentPageBlocks.length > 0) {
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contentPages.push(generateContentPage(
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currentPageBlocks, pageNumber, sizeConfig, false
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));
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currentPageBlocks = [];
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currentHeight = 0;
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pageNumber++;
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}
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currentPageBlocks.push(block);
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currentHeight += block.estimatedHeight;
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}
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// 最后一页
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if (currentPageBlocks.length > 0) {
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contentPages.push(generateContentPage(
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currentPageBlocks, pageNumber, sizeConfig, true
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));
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}
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return contentPages;
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}
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/**
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* 拆分超大块（超长段落文本拆成多段）
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* @param {Object} block - 块级元素
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* @param {number} pageHeight - 可用内容高度
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* @returns {Array} 拆分后的块数组
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*/
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function splitOversizedBlock(block, pageHeight) {
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// 图片块不拆分，保留原样（会被截断但保持完整）
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if (block.type === 'img') {
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return [block];
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}
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// 文本类块：按句子拆分
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var text = '';
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var wrapperTag = 'p';
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if (block.type === 'blockquote') {
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text = $(block.html).text();
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wrapperTag = 'blockquote';
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} else {
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text = $(block.html).text();
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}
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if (!text || text.length === 0) {
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return [block];
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}
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// 按句子拆分：句号、问号、叹号、换行
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var sentences = text.split(/(?<=[。！？\n])/);
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if (sentences.length <= 1) {
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// 无法按句子拆分，按固定字符数拆分
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sentences = [];
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var chunkSize = Math.floor(getContentWidth() / config.fontSize) *
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Math.floor(pageHeight / (config.fontSize * 1.8));
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if (chunkSize < 10) chunkSize = 10;
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for (var ci = 0; ci < text.length; ci += chunkSize) {
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sentences.push(text.substring(ci, ci + chunkSize));
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}
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}
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var result = [];
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for (var j = 0; j < sentences.length; j++) {
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var s = sentences[j].trim();
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if (!s) continue;
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var h = estimateTextHeight(s, config.fontSize);
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result.push({
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type: wrapperTag === 'blockquote' ? 'blockquote' : 'p',
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html: '<' + wrapperTag + '>' + s + '</' + wrapperTag + '>',
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estimatedHeight: h
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});
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}
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return result.length > 0 ? result : [block];
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}
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// ===== 页面HTML生成 =====
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/**
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* 生成封面页HTML
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*/
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function generateCoverPage(sizeConfig) {
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var html = '<div class="phone-image-page page-cover" style="width:' +
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sizeConfig.width + 'px;height:' + sizeConfig.height + 'px;">';
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if (postData.poster) {
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html += '<img class="cover-image" src="' + postData.poster + '" alt="">';
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}
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html += '<div class="cover-title">' + escapeHtml(postData.title) + '</div>';
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if (postData.desc) {
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html += '<div class="cover-subtitle">' + escapeHtml(postData.desc) + '</div>';
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}
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html += '<div class="cover-meta">';
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if (postData.category_name) {
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html += escapeHtml(postData.category_name) + ' | ';
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}
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if (postData.author_name) {
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html += escapeHtml(postData.author_name) + ' | ';
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}
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if (postData.create_time) {
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html += postData.create_time;
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}
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html += '</div>';
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html += '</div>';
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return { type: 'cover', html: html };
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}
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/**
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* 生成内容页HTML
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*/
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function generateContentPage(blocks, pageNum, sizeConfig, isLast) {
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var html = '<div class="phone-image-page page-body" style="width:' +
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sizeConfig.width + 'px;height:' + sizeConfig.height + 'px;">';
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// 页头（仅首页内容页显示标题）
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if (pageNum === 1) {
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html += '<div class="page-header">';
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html += '<div class="page-title">' + escapeHtml(postData.title) + '</div>';
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html += '</div>';
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}
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// 正文内容区
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html += '<div class="page-content">';
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for (var i = 0; i < blocks.length; i++) {
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html += blocks[i].html;
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}
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html += '</div>';
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// 页脚
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html += '<div class="page-footer">';
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html += '<span>' + escapeHtml(postData.author_name || '') + '</span>';
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html += '<span>' + pageNum + '</span>';
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html += '</div>';
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html += '</div>';
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return { type: 'content', html: html, pageNum: pageNum };
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}
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/**
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* 生成尾页/总结页HTML
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*/
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function generateSummaryPage(sizeConfig, totalPages) {
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var html = '<div class="phone-image-page page-summary" style="width:' +
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sizeConfig.width + 'px;height:' + sizeConfig.height + 'px;">';
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html += '<div class="summary-title">感谢阅读</div>';
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html += '<div class="summary-text">' + escapeHtml(postData.title) + '</div>';
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if (postData.desc) {
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html += '<div class="summary-text" style="font-size:12px;">' + escapeHtml(postData.desc) + '</div>';
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}
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html += '<div class="summary-footer">';
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html += '共 ' + totalPages + ' 页';
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if (postData.author_name) {
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html += ' | ' + escapeHtml(postData.author_name);
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}
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html += '</div>';
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html += '</div>';
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return { type: 'summary', html: html };
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}
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// ===== DOM渲染 =====
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/**
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* 渲染分页结果到DOM
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*/
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function renderToDOM(sizeConfig) {
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if (!$container || !$container.length) return;
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var containerClasses = [
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'phone-image-container',
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'tpl-' + config.template,
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'size-' + config.size,
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'font-' + config.font
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];
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$container.attr('class', containerClasses.join(' '));
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$container.css({
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'font-family': config.fonts[config.font] || config.fonts['source-han-sans'],
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'font-size': config.fontSize + 'px'
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});
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$container.empty();
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for (var i = 0; i < pages.length; i++) {
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$container.append(pages[i].html);
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}
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}
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// ===== 图片生成 =====
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/**
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* 逐页截图生成图片
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* @param {Function} [onProgress] 进度回调 function(currentIndex, totalPages, canvas)
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* @returns {Promise} jQuery Deferred, resolves with array of canvas objects
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*/
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function generateImages(onProgress) {
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var deferred = $.Deferred();
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var canvases = [];
|
||
var $pages = $container.find('.phone-image-page');
|
||
|
||
if ($pages.length === 0) {
|
||
deferred.reject('没有可渲染的页面');
|
||
return deferred.promise();
|
||
}
|
||
|
||
var index = 0;
|
||
var total = $pages.length;
|
||
|
||
function captureNext() {
|
||
if (index >= total) {
|
||
if (onProgress) onProgress(total, total, null);
|
||
deferred.resolve(canvases);
|
||
return;
|
||
}
|
||
|
||
var $page = $($pages[index]);
|
||
|
||
html2canvas($page[0], {
|
||
scale: 2,
|
||
useCORS: true,
|
||
backgroundColor: '#ffffff',
|
||
width: $page.outerWidth(),
|
||
height: $page.outerHeight(),
|
||
logging: false
|
||
}).then(function (canvas) {
|
||
canvases.push(canvas);
|
||
index++;
|
||
if (onProgress) onProgress(index, total, canvas);
|
||
captureNext();
|
||
}).catch(function (err) {
|
||
deferred.reject('截图失败(第' + (index + 1) + '页): ' + err);
|
||
});
|
||
}
|
||
|
||
if (onProgress) onProgress(0, total, null);
|
||
captureNext();
|
||
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();
|
||
|
||
generateImages(onProgress).then(function (canvases) {
|
||
var pagesData = [];
|
||
for (var i = 0; i < canvases.length; i++) {
|
||
pagesData.push(canvases[i].toDataURL('image/jpeg', 0.92));
|
||
}
|
||
|
||
$.ajax({
|
||
url: '/index.php/admin/post/savePostOutput',
|
||
type: 'POST',
|
||
data: JSON.stringify({
|
||
post_id: postId,
|
||
output_type: 'phone_image',
|
||
config: saveConfig || config,
|
||
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();
|
||
}
|
||
|
||
/**
|
||
* 将生成的canvas数组显示为缩略图
|
||
* @param {Array} canvases canvas对象数组
|
||
* @param {string} containerSelector 容器选择器
|
||
*/
|
||
function showGeneratedThumbnails(canvases, containerSelector) {
|
||
var $container = $(containerSelector);
|
||
$container.empty();
|
||
|
||
for (var i = 0; i < canvases.length; i++) {
|
||
var thumb = canvases[i].toDataURL('image/jpeg', 0.5);
|
||
var $item = $('<div class="phone-thumb-item" data-index="' + i + '">' +
|
||
'<img src="' + thumb + '" alt="第' + (i + 1) + '页">' +
|
||
'<span class="phone-thumb-page">' + (i + 1) + '</span>' +
|
||
'</div>');
|
||
$container.append($item);
|
||
}
|
||
}
|
||
|
||
// ===== 配置切换 =====
|
||
|
||
/**
|
||
* 切换模板
|
||
*/
|
||
function switchTemplate(name) {
|
||
config.template = name;
|
||
if ($container) {
|
||
$container.removeClass('tpl-minimal tpl-magazine tpl-mixed').addClass('tpl-' + name);
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 切换尺寸
|
||
*/
|
||
function switchSize(name) {
|
||
config.size = name;
|
||
}
|
||
|
||
/**
|
||
* 切换字体
|
||
*/
|
||
function switchFont(name) {
|
||
config.font = name;
|
||
if ($container) {
|
||
$container.removeClass('font-source-han-sans font-alibaba-puhuiti font-lxgw-wenkai').addClass('font-' + name);
|
||
$container.css('font-family', config.fonts[name] || config.fonts['source-han-sans']);
|
||
}
|
||
}
|
||
|
||
// ===== 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;
|
||
}
|
||
|
||
/**
|
||
* 获取当前配置
|
||
*/
|
||
function getConfig() {
|
||
return $.extend({}, config);
|
||
}
|
||
|
||
/**
|
||
* 获取分页结果
|
||
*/
|
||
function getPages() {
|
||
return pages.slice();
|
||
}
|
||
|
||
// ===== AI 智能排版 =====
|
||
|
||
/**
|
||
* 应用AI推荐配置
|
||
*/
|
||
function applyAiRecommendation(recommendation) {
|
||
if (recommendation.template) {
|
||
switchTemplate(recommendation.template);
|
||
$('.template-btn').removeClass('active');
|
||
$('.template-btn[data-template="' + recommendation.template + '"]').addClass('active');
|
||
$('[name="size"]').val(config.size);
|
||
}
|
||
if (recommendation.font) {
|
||
switchFont(recommendation.font);
|
||
$('[name="font"]').val(recommendation.font);
|
||
}
|
||
if (recommendation.font_size) {
|
||
config.fontSize = parseInt(recommendation.font_size);
|
||
$('[name="fontSize"]').val(config.fontSize);
|
||
$('#fontSizeValue').text(config.fontSize + 'px');
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 应用AI优化内容（替换预览用的内容）
|
||
*/
|
||
var originalContentHtml = '';
|
||
function applyAiContent(optimizedContent) {
|
||
if (!originalContentHtml) {
|
||
originalContentHtml = postData.content_html;
|
||
}
|
||
if (optimizedContent.optimized_paragraphs) {
|
||
var newHtml = '';
|
||
for (var i = 0; i < optimizedContent.optimized_paragraphs.length; i++) {
|
||
newHtml += '<p>' + optimizedContent.optimized_paragraphs[i] + '</p>';
|
||
}
|
||
postData.content_html = newHtml;
|
||
postData.title = optimizedContent.optimized_title || postData.title;
|
||
}
|
||
}
|
||
|
||
/**
|
||
* 恢复原始内容
|
||
*/
|
||
function restoreOriginalContent() {
|
||
if (originalContentHtml) {
|
||
postData.content_html = originalContentHtml;
|
||
originalContentHtml = '';
|
||
}
|
||
}
|
||
|
||
// ===== 公开API =====
|
||
return {
|
||
init: init,
|
||
render: render,
|
||
paginate: render,
|
||
generateImages: generateImages,
|
||
saveImages: saveImages,
|
||
showGeneratedThumbnails: showGeneratedThumbnails,
|
||
switchTemplate: switchTemplate,
|
||
switchSize: switchSize,
|
||
switchFont: switchFont,
|
||
getConfig: getConfig,
|
||
getPages: getPages,
|
||
applyAiRecommendation: applyAiRecommendation,
|
||
applyAiContent: applyAiContent,
|
||
restoreOriginalContent: restoreOriginalContent
|
||
};
|
||
})();
|