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@ -37,7 +37,7 @@ function analyzePageStructure(container) { |
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return { |
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hasHeader: !!header, |
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hasBottom: false, |
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header: header?.cloneNode(true), |
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header: header, |
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bottom: "", |
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main: mainContent, |
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tables: Array.from(mainContent.querySelectorAll('table')) |
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@ -61,78 +61,65 @@ function paginateContent(structure, options) { |
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} |
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const paperHeight = _pageH * 3.78; |
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const marginPx = margin * 3.78; |
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const printableHeight = paperHeight - marginPx * 2; |
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const headerHeight = structure.hasHeader ? structure.header.getBoundingClientRect().height : 0; |
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const bottomHeight = structure.hasBottom ? structure.bottom.getBoundingClientRect().height : 0; |
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const availableHeight = printableHeight - headerHeight - bottomHeight-30; //50是页眉与内容的间距，
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const availableHeight = printableHeight - headerHeight - bottomHeight; //50是页眉与内容的间距，
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console.log(`📊 分页基础参数:`); |
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console.log(` 纸张高度: ${paperHeight.toFixed(0)}px, 可用高度: ${availableHeight.toFixed(0)}px`); |
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const pages = []; |
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let currentPage = []; |
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let currentHeight = 0; |
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const ElementMarginPx=10; |
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Array.from(structure.main.children).forEach((child, index) => { |
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const childHeight = child.getBoundingClientRect().height; |
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if (childHeight.toFixed(1)==0) return; |
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const elementInfo = `${child.tagName}${child.className ? '.' + child.className.split(' ')[0] : ''}`; |
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const isTableContainer = child.querySelector('table'); |
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const remainingHeight = availableHeight - currentHeight; |
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console.log(`\n🔍 [元素 ${index + 1}] ${elementInfo}`); |
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console.log(` 高度: ${childHeight.toFixed(1)}px, 累积: ${currentHeight.toFixed(1)}px`); |
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console.log(` 剩余空间: ${remainingHeight.toFixed(1)}px`); |
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// ==================== 智能表格分割 ====================
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if (isTableContainer) { |
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if (currentHeight + childHeight <= availableHeight * 0.92) { |
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console.log(` ✅ 表格能完整放入当前页`); |
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currentPage.push(child.cloneNode(true)); |
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currentHeight += childHeight; |
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} else { |
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console.log(` ⚠️ 表格无法完整放入，剩余空间: ${remainingHeight.toFixed(1)}px`); |
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// 对表格进行智能分页，第一页使用剩余空间
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const tablePages = paginateTableSmart(child, remainingHeight, availableHeight, options); |
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if (tablePages.length > 0) { |
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// 普通元素处理
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if (currentHeight + childHeight > availableHeight) { |
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if (currentPage.length > 0 && (childHeight<=100 || remainingHeight<=100)){ |
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console.log(` 📄 推入当前页 (${currentPage.length}个元素)`); |
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pages.push(currentPage); |
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currentPage = []; |
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currentHeight = 0; |
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}else{ |
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// //child 本身比较大，currentPage还有比较大的空白
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const result=splitElement(child, remainingHeight,availableHeight,ElementMarginPx) |
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const subPages=result.pages |
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if (subPages.length > 0) { |
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// 第一页：部分表格 + 前面累积的普通元素（合并在一起）
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const firstPageContent = tablePages[0]; |
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const firstPageContent = subPages[0]; |
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if (firstPageContent.length > 0) { |
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currentPage.push(...firstPageContent); |
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pages.push([...currentPage]); |
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console.log(` ✅ 创建混合页: ${currentPage.length}个元素 (含caption和部分表格)`); |
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pages.push(currentPage); |
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console.log(` ✅ 创建混合页: ${currentPage.length}个元素`); |
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} |
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// 剩余的表格页（纯表格）
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for (let i = 1; i < tablePages.length; i++) { |
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pages.push(tablePages[i]); |
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console.log(` 📊 添加纯表格页 ${i} (${tablePages[i].length}个元素)`); |
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if(subPages.length==1) return |
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// 剩余的分页，直到倒数第二页
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for (let i = 1; i < subPages.length-1; i++) { |
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pages.push(subPages[i]); |
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console.log(` 📊 添加普通页 ${i} (${subPages[i].length}个元素)`); |
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} |
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currentPage = subPages[subPages.length-1]; //继续使用最后一页，可能有大片的空间
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currentHeight = result.curHight; //智能表格分页后最后一页的高度（可能包含 caption 和部分表格）
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} |
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currentPage = []; |
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currentHeight = 0; |
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return; |
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} |
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return; |
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} |
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// ============================================================
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// 普通元素处理
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if (currentHeight + childHeight > availableHeight * 0.92) { |
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if (currentPage.length > 0) { |
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console.log(` 📄 推入当前页 (${currentPage.length}个元素)`); |
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pages.push([...currentPage]); |
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currentPage = []; |
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currentHeight = 0; |
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} |
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} |
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currentPage.push(child.cloneNode(true)); |
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currentHeight += (childHeight+20); //20margin
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currentPage.push(child.cloneNode(true)); |
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currentHeight += (childHeight+ElementMarginPx); //20margin
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}); |
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// 处理剩余元素
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@ -140,23 +127,232 @@ function paginateContent(structure, options) { |
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console.log(`\n📄 最后推入剩余元素 (${currentPage.length}个)`); |
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pages.push([...currentPage]); |
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} |
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return pages; |
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} |
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function splitElement(element, remainingHeight, availableHeight,elementMarginPx) { |
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console.log(` 🔪 开始递归探测可拆分内容，上一页剩余高度: ${remainingHeight}px`); |
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// 递归查找可拆分的容器
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const findSplittableContainer = (el, depth = 0) => { |
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// 检查当前元素的高度是否小于100px
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const elHeight = el.getBoundingClientRect().height; |
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if (elHeight <= 105 ) { |
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console.log(` 元素高度 ${elHeight.toFixed(1)}px < 100px，停止拆分，返回元素本身`); |
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return { |
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container: el, |
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items: [el], // 将自身作为唯一项返回
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level: depth, |
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isMinimumSize: true // 标记为最小尺寸元素
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}; |
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} |
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if (el.tagName=="table" || el.tagName=="TABLE"){ |
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return { |
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container: el, |
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items: [el], // 将自身作为唯一项返回
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level: depth, |
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istable: true // 标记为最小尺寸元素
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}; |
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} |
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const children = Array.from(el.children); |
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// 如果当前层有多个子元素，就在这里拆分
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if (children.length > 1) { |
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console.log(` 在第${depth}层找到${children.length}个子元素，在此拆分`); |
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return { |
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container: el, |
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items: children, |
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level: depth |
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}; |
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} |
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// 如果只有一个子元素，继续向下探测
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if (children.length === 1) { |
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return findSplittableContainer(children[0], depth + 1); |
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} |
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// 没有子元素，无法拆分
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return null; |
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} |
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// 获取元素在布局中的垂直增量（对当前页高度的贡献）
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const getVerticalIncrement = (item, previousItem) => { |
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const itemRect = item.getBoundingClientRect(); |
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// 如果没有前一个元素，或者这是新行的第一个元素，返回完整高度
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if (!previousItem) { |
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return itemRect.height; |
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} |
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const prevRect = previousItem.getBoundingClientRect(); |
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// 判断是否在同一行（垂直位置相近）
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const isSameRow = Math.abs(itemRect.top - prevRect.top) < 10; |
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if (isSameRow) { |
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// 同一行：不增加高度（因为已经在同一行的高度中了）
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return 0; |
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} else { |
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// 不同行：返回新行的高度
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return itemRect.height+3; |
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} |
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}; |
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// // 找到可拆分的容器
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const splittable = findSplittableContainer(element); |
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// 按高度拆分这些项
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const pages = []; // 存储所有页的元素数组
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let currentPage = []; // 当前页的元素
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let currentHeight = 0; // 当前页的总高度
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let lastItemInPage = null; // 当前页最后一个元素，用于判断同行
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// 首先处理上一页的剩余空间
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if (remainingHeight > 0) { |
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console.log(` ⬆️ 尝试填充上一页剩余高度: ${remainingHeight}px`); |
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// 找出能放入上一页的元素
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let remainingItems = [...splittable.items]; |
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let itemsForPreviousPage = []; |
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let heightForPreviousPage = 0; |
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let lastItemForPrevious = null; |
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for (let i = 0; i < remainingItems.length; i++) { |
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const item = remainingItems[i]; |
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const verticalIncrement = getVerticalIncrement(item, lastItemForPrevious); |
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// 如果加上这个元素的垂直增量不会超出剩余高度，就加入上一页
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if (heightForPreviousPage + verticalIncrement <= remainingHeight) { |
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itemsForPreviousPage.push(item.cloneNode(true)); |
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heightForPreviousPage += verticalIncrement; |
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lastItemForPrevious = item; |
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remainingItems.shift(); // 移除已处理的元素
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i--; // 调整索引
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} else { |
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if (item.tagName=="table" || item.tagName=="TABLE") { |
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const remain=remainingHeight-heightForPreviousPage |
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console.log(` ⚠️ 表格无法上一页剩余空间，剩余空间: ${remainingHeight.toFixed(1)}px`); |
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// 对表格进行智能分页，第一页使用剩余空间
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const result = paginateTableSmart(item, remain, availableHeight,elementMarginPx, null); |
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const tablePages=result.pages |
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if (tablePages.length > 0) { |
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// 第一页：部分表格 + 前面累积的普通元素（合并在一起）
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const firstPageContent = tablePages[0]; |
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if (firstPageContent.length > 0) { |
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itemsForPreviousPage.push(...firstPageContent); |
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pages.push(itemsForPreviousPage); |
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console.log(` ✅ 创建混合页: ${itemsForPreviousPage.length}个元素 (含caption和部分表格)`); |
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itemsForPreviousPage=[] //立刻清理掉，后面有对非table的处理
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} |
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if(tablePages.length>1){ |
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// 剩余的表格页（纯表格）
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for (let i = 1; i < tablePages.length-1; i++) { |
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pages.push(tablePages[i]); |
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console.log(` 📊 添加纯表格页 ${i} (${tablePages[i].length}个元素)`); |
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} |
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currentPage = tablePages[tablePages.length-1]; //继续使用最后一页，可能有大片的空间
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currentHeight = result.curHight; //智能表格分页后最后一页的高度（可能包含 caption 和部分表格）
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} |
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} |
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remainingItems.shift(); // 移除已处理的元素
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splittable.items = remainingItems; |
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} |
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break; |
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} |
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} |
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// 如果有元素放入上一页
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if (itemsForPreviousPage.length > 0) { |
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pages.push(itemsForPreviousPage); |
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console.log(` ⬆️ 填充上一页: ${itemsForPreviousPage.length}项，高度 ${heightForPreviousPage.toFixed(1)}px`); |
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// 剩余的元素继续处理
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splittable.items = remainingItems; |
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} |
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} |
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// 处理剩余的元素，分页
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splittable.items.forEach((item, index) => { |
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// 计算这个元素对当前页高度的垂直增量
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const verticalIncrement = getVerticalIncrement(item, lastItemInPage); |
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// 如果当前页不为空，且加上这个元素的垂直增量会超高，则开始新页
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if (currentHeight + verticalIncrement > availableHeight) { |
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if (item.tagName=="table" || item.tagName=="TABLE") { |
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const remain=availableHeight-currentHeight |
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console.log(` ⚠️ 表格无法上一页剩余空间，剩余空间: ${remainingHeight.toFixed(1)}px`); |
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// 对表格进行智能分页，第一页使用剩余空间
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const result = paginateTableSmart(item, remain, availableHeight,elementMarginPx, null); |
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const tablePages=result.pages |
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if (tablePages.length > 0) { |
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// 第一页：部分表格 + 前面累积的普通元素（合并在一起）
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const firstPageContent = tablePages[0]; |
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if (firstPageContent.length > 0) { |
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currentPage.push(...firstPageContent); |
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pages.push(currentPage); |
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console.log(` ✅ 创建混合页: ${currentPage.length}个元素 (含caption和部分表格)`); |
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} |
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if(tablePages.length==1) return; |
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// 剩余的表格页（纯表格）
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for (let i = 1; i < tablePages.length-1; i++) { |
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pages.push(tablePages[i]); |
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console.log(` 📊 添加纯表格页 ${i} (${tablePages[i].length}个元素)`); |
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} |
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currentPage = tablePages[tablePages.length-1]; //继续使用最后一页，可能有大片的空间
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currentHeight = result.curHight; //智能表格分页后最后一页的高度（可能包含 caption 和部分表格）
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} |
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return; |
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} |
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// 保存当前页
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pages.push(currentPage); |
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console.log(` 📄 第 ${pages.length} 页: ${currentPage.length}项，高度 ${currentHeight.toFixed(1)}px`); |
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// 开始新页 - 当前元素作为新页的第一个元素
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currentPage = [item.cloneNode(true)]; |
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currentHeight = item.getBoundingClientRect().height; // 新页第一个元素贡献完整高度
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lastItemInPage = item; |
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} else { |
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// 加入当前页
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currentPage.push(item.cloneNode(true)); |
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currentHeight += verticalIncrement; // 只增加垂直方向上的增量
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lastItemInPage = item; |
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} |
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}); |
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// 处理最后一个元素
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pages.push(currentPage); |
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console.log(` 📄 第 ${pages.length} 页: ${currentPage.length}项，高度 ${currentHeight.toFixed(1)}px`); |
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console.log(` ✅ 递归探测拆分完成，共 ${pages.length} 页`); |
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// 返回所有页的数据
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return { |
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pages: pages, |
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curHight: currentHeight, // 最后一页的高度
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}; |
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} |
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/** |
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* 智能表格分页函数（支持 caption） |
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* @returns {Array<Array>} 分页结果，每个元素是一个页面数组 |
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*/ |
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function paginateTableSmart(tableContainer, firstPageHeight, subsequentPageHeight, options) { |
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const table = tableContainer.querySelector('table'); |
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function paginateTableSmart(tableContainer, firstPageHeight, subsequentPageHeight,ElementMarginPx, options) { |
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const table = tableContainer//.querySelector('table');
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const caption = table?.querySelector('caption'); // 获取 caption
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const thead = table?.querySelector('thead'); |
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const tbody = table?.querySelector('tbody'); |
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if (!thead || !tbody) { |
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console.warn('⚠️ 表格缺少 thead 或 tbody'); |
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return [[tableContainer.cloneNode(true)]]; |
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return {pages:[tableContainer.cloneNode(true)],curHight:tableContainer.getBoundingClientRect().height}; |
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} |
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const captionHeight = caption ? caption.getBoundingClientRect().height : 0; |
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@ -170,10 +366,10 @@ function paginateTableSmart(tableContainer, firstPageHeight, subsequentPageHeigh |
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// 如果整个表格能在第一页放下
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const totalTableHeight = tableContainer.getBoundingClientRect().height; |
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if (totalTableHeight <= firstPageHeight * 0.85) { |
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if (totalTableHeight <= firstPageHeight) { |
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console.log(` ✅ 表格总高度 ${totalTableHeight.toFixed(1)}px 能放入第一页`); |
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// 包含 caption
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return [[createTablePage(tableContainer, thead, rows, true)]]; |
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return {pages:[createTablePage(tableContainer, thead, rows, true)],curHight:totalTableHeight}; |
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} |
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const pages = []; |
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@ -186,18 +382,18 @@ function paginateTableSmart(tableContainer, firstPageHeight, subsequentPageHeigh |
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const pageHeight = isFirstPage ? firstPageHeight : subsequentPageHeight; |
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// 检查是否需要分页
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if (currentHeight + rowHeight > pageHeight * 0.85 && currentRows.length > 0) { |
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if (currentHeight + rowHeight > pageHeight && currentRows.length > 0) { |
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// 创建当前页（只有第一页包含 caption）
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pages.push([createTablePage(tableContainer, thead, currentRows, isFirstPage)]); |
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console.log(` 📊 分页${isFirstPage ? '(含caption)' : ''}: ${currentRows.length}行, ${currentHeight.toFixed(1)}px`); |
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// 重置为新页面
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currentRows = [row]; |
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currentHeight = captionHeight + headerHeight + rowHeight; // 新页面也要包含 caption 高度
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currentHeight = captionHeight + headerHeight + rowHeight+ElementMarginPx; // 新页面也要包含 caption 高度
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isFirstPage = false; |
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} else { |
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currentRows.push(row); |
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currentHeight += rowHeight; |
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currentHeight += rowHeight+ElementMarginPx; |
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} |
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// 最后一行
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@ -208,7 +404,7 @@ function paginateTableSmart(tableContainer, firstPageHeight, subsequentPageHeigh |
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}); |
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console.log(` 📊 表格总计分页: ${pages.length}页`); |
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return pages; |
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return {pages:pages,curHight:currentHeight}; |
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} |
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/** |
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@ -219,7 +415,7 @@ function createTablePage(originalContainer, thead, rows, includeCaption = false) |
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const container = originalContainer.cloneNode(false); |
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const table = document.createElement('table'); |
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const originalTable = originalContainer.querySelector('table'); |
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const originalTable = originalContainer//.querySelector('table');
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table.className = originalTable.className; |
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table.style.cssText = originalTable.style.cssText; |
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@ -237,8 +433,7 @@ function createTablePage(originalContainer, thead, rows, includeCaption = false) |
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rows.forEach(row => tbody.appendChild(row.cloneNode(true))); |
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table.appendChild(tbody); |
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container.appendChild(table); |
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return container; |
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return table; |
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} |
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function buildPrintPages(pages, structure, options) { |
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@ -260,7 +455,9 @@ function buildPrintPages(pages, structure, options) { |
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const contentDiv = document.createElement('div'); |
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contentDiv.className = 'print-page-content'; |
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contentDiv.style.display="flex" |
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contentDiv.style.flexWrap="wrap" |
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elements.forEach(el => { |
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if (el?.nodeType === Node.ELEMENT_NODE) { |
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contentDiv.appendChild(el); |
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@ -313,7 +510,7 @@ function printViaIframe(content, options) { |
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} |
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.print-page { |
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page-break-after: always; |
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padding:${margin}mm ${margin+5}mm; |
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padding: ${margin}mm ${margin+5}mm 0 ${margin+5}mm; |
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} |
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.print-page:last-child { |
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page-break-after: avoid; |
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