如何计算<fo:region-before />身高？
How to calculate the <fo:region-before /> height?
在我的 pdf 文档中，我希望一些数据在所有页面上重复，所以我将它们放在 <fo:region-before/> 中。这就导致了区域的高度不固定。我想计算这个区域的高度，把 <fo:region-body/> 的数据放在合适的位置，但我不知道该怎么做？这是我的代码：
<#assign imageBorderWidth=0.4/>
<#assign logoHeight=0.5/>
<#assign regionAfterBlockHeight=0.22/>
<#assign regionAfterHeight=regionAfterBlockHeight * 4/>
<#setting locale="en_US">
<fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format" font-family="ArialUni, ArialUniBold, ArialUniItalic" font-size="10pt">
<fo:layout-master-set>
<fo:simple-page-master master-name="letter-portrait" page-width="8.5in" page-height="11in"
margin-top="0" margin-bottom="0" margin-left="0in" margin-right="0in">
<fo:region-body margin-top="5in" margin-bottom="${regionAfterHeight}in"
margin-left="${imageBorderWidth}in" margin-right="${imageBorderWidth}in" background-color="yellow"/>
<fo:region-before extent="2in" />
<fo:region-after extent="${regionAfterHeight}in"/>
</fo:simple-page-master>
</fo:layout-master-set>
<fo:page-sequence master-reference="letter-portrait" id="mainSequence">
<fo:static-content flow-name="xsl-region-before">
<fo:block-container absolute-position="absolute" top="0" left="0">
<fo:block>
<fo:external-graphic src="${backgroundLocation.getLocation()}" content-height="11in" content-width="8.5in" scaling="non-uniform"/>
</fo:block>
</fo:block-container>
<#--Header Hóa đơn GTGT, logo, mẫu số-->
<fo:table table-layout="fixed" width="100%">
<fo:table-body>
<fo:table-row>
<fo:table-cell padding="0.5in 0.5in 0in 0.5in" text-align="center" width="2.5in">
<fo:block>
<#if logoLocation?has_content>
<fo:external-graphic src="${logoLocation.getLocation()}" content-width="2in" content-height="${logoHeight}in" scaling="non-uniform"/>
<#else >
<fo:leader />
</#if>
</fo:block>
</fo:table-cell>
<fo:table-cell text-align="center" width="3.5in" padding-top="${imageBorderWidth}in" display-align="center ">
<fo:block-container height="0.34in">
<fo:block font-size="14pt" font-family="ArialUniBold" text-align="center">
HÓA ĐƠN GIÁ TRỊ GIA TĂNG
</fo:block>
</fo:block-container>
<fo:block-container height="0.27in">
<fo:block>
<fo:inline font-style="italic">(Bản thể hiện của hóa đơn điện tử)</fo:inline>
</fo:block>
</fo:block-container>
<fo:block-container height="0.27in">
<fo:block>
<fo:inline font-style="italic">Ngày tháng năm</fo:inline>
</fo:block>
</fo:block-container>
</fo:table-cell>
<fo:table-cell text-align="center" width="2in" padding-top="${imageBorderWidth}in" display-align="center">
<fo:table table-layout="fixed" width="100%" >
<fo:table-column column-width="30%"/>
<fo:table-column column-width="60%"/>
<fo:table-body>
<fo:table-row>
<fo:table-cell text-align="left">
<fo:block-container height="0.27in">
<fo:block><fo:inline>Form no:</fo:inline></fo:block>
</fo:block-container>
</fo:table-cell>
<fo:table-cell text-align="left">
<fo:block-container height="0.27in">
<fo:block><fo:inline>01GTKT0/001</fo:inline></fo:block>
</fo:block-container>
</fo:table-cell>
</fo:table-row>
<fo:table-row>
<fo:table-cell text-align="left">
<fo:block-container height="0.27in">
<fo:block><fo:inline>Sign:</fo:inline></fo:block>
</fo:block-container>
</fo:table-cell>
<fo:table-cell text-align="left">
<fo:block-container height="0.27in">
<fo:block><fo:inline>AB/21E</fo:inline></fo:block>
</fo:block-container>
</fo:table-cell>
</fo:table-row>
<fo:table-row>
<fo:table-cell text-align="left">
<fo:block-container height="0.27in">
<fo:block><fo:inline>No:</fo:inline></fo:block>
</fo:block-container>
</fo:table-cell>
<fo:table-cell text-align="left">
<fo:block-container height="0.27in">
<fo:block><fo:inline>000001</fo:inline></fo:block>
</fo:block-container>
</fo:table-cell>
</fo:table-row>
</fo:table-body>
</fo:table>
</fo:table-cell>
</fo:table-row>
</fo:table-body>
</fo:table>
<fo:block border-bottom-width="1.5pt" margin="0 ${imageBorderWidth}in 0 ${imageBorderWidth}in " border-bottom-style="solid" margin-top="3mm" border-bottom-color="#b7b7b7" />
<fo:table table-layout="fixed" width="100%" margin-top="0.1in" font-size="10pt">
<fo:table-column column-width="80%"/>
<fo:table-column column-width="20%"/>
<fo:table-body>
<fo:table-row>
<fo:table-cell text-align="left" padding-left="${imageBorderWidth}in">
<fo:block font-size="15pt" font-family="ArialUniBold" line-height="1.4"><fo:inline>CÔNG TY TNHH QUẢN LÝ NỢ VÀ KHAI THÁC TÀI SẢN NGÂN HÀNG TMCP BẮC Á - CHI NHÁNH THÀNH PHỐ HỒ CHÍ MINH</fo:inline></fo:block>
</fo:table-cell>
<fo:table-cell text-align="center" number-rows-spanned="5" display-align="before" padding-right="${imageBorderWidth}in">
<fo:block>
<#assign qrContentWidth=(8.5*0.2) - imageBorderWidth/>
<fo:external-graphic src="${qrCodeImgLocation.getLocation()}" content-width="${qrContentWidth}in" content-height="scale-to-fit" scaling="uniform"/>
</fo:block>
</fo:table-cell>
</fo:table-row>
<fo:table-row>
<fo:table-cell text-align="left" padding-left="${imageBorderWidth}in">
<fo:block line-height="1.8"><fo:inline>Taxcode: 0101243150-999</fo:inline></fo:block>
</fo:table-cell>
</fo:table-row>
<fo:table-row>
<fo:table-cell text-align="left" padding-left="${imageBorderWidth}in">
<fo:block line-height="1.8">
<fo:table inline-progression-dimension="auto" table-layout="auto">
<fo:table-column column-number="1" column-width="45pt" />
<fo:table-column column-number="2"/>
<fo:table-body>
<fo:table-row>
<fo:table-cell text-align="left" padding="0">
<fo:block>Address:</fo:block>
</fo:table-cell>
<fo:table-cell text-align="left" padding="0">
<fo:block>Số 36A Phan Đăng Lưu, Phường 05, Quận Phú Nhuận, Thành phố Hồ Chí Minh, Việt Nam</fo:block>
</fo:table-cell>
</fo:table-row>
</fo:table-body>
</fo:table>
</fo:block>
</fo:table-cell>
</fo:table-row>
<fo:table-row>
<fo:table-cell text-align="left" padding-left="${imageBorderWidth}in">
<fo:block line-height="1.8"><fo:inline>Phone: 028.38229812</fo:inline></fo:block>
</fo:table-cell>
</fo:table-row>
<fo:table-row>
<fo:table-cell text-align="left" padding-left="${imageBorderWidth}in">
<fo:block line-height="1.8"><fo:inline>Bank Account:</fo:inline></fo:block>
</fo:table-cell>
</fo:table-row>
</fo:table-body>
</fo:table>
<fo:block border-bottom-width="1.5pt" margin="0 ${imageBorderWidth}in 0 ${imageBorderWidth}in " border-bottom-style="solid" margin-top="1mm" border-bottom-color="#b7b7b7" />
</fo:static-content>
<fo:static-content flow-name="xsl-region-after" font-size="9pt" >
<fo:table table-layout="fixed" width="100%" >
<fo:table-column column-width="90%"/>
<fo:table-column column-width="10%"/>
<fo:table-body>
<fo:table-row>
<fo:table-cell text-align="left" padding-left="${imageBorderWidth}in">
<fo:block-container height="${regionAfterBlockHeight}in"><fo:block text-align="left">Tra cứu tại Website: https://www.meinvoice.vn/tra-cuu - Mã tra cứu hóa đơn:</fo:block></fo:block-container>
</fo:table-cell>
<fo:table-cell/>
</fo:table-row>
<fo:table-row>
<fo:table-cell >
<fo:block-container height="${regionAfterBlockHeight}in"><fo:block text-align="center">(Cần kiểm tra, đối chiếu khi lập, giao, nhận hóa đơn)</fo:block></fo:block-container>
</fo:table-cell>
<fo:table-cell/>
</fo:table-row>
<fo:table-row>
<fo:table-cell>
<fo:block-container height="${regionAfterBlockHeight}in"><fo:block text-align="center">Phát hành bởi phần mềm MISA meInvoice - Công ty Cổ phần MISA (www.misa.com.vn) - MST: 0101243150</fo:block></fo:block-container>
</fo:table-cell>
<fo:table-cell padding-right="${imageBorderWidth}in">
<fo:block-container height="${regionAfterBlockHeight}in">
<fo:block>
<fo:block text-align="right"><fo:page-number/>/<fo:page-number-citation-last ref-id="endContent"/></fo:block>
</fo:block>
</fo:block-container>
</fo:table-cell>
</fo:table-row>
</fo:table-body>
</fo:table>
</fo:static-content>
<fo:flow flow-name="xsl-region-body" >
<fo:block>aaaaa</fo:block>
<fo:block>aaaaa</fo:block>
<fo:block>aaaaa</fo:block>
<fo:block>aaaaa</fo:block>
<fo:block>aaaaa</fo:block>
<fo:block>aaaaa</fo:block>
<fo:block>aaaaa</fo:block>
<fo:block>aaaaa</fo:block>
<fo:block>aaaaa</fo:block>
<fo:block>aaaaa</fo:block>
<fo:block>aaaaa</fo:block>
<fo:block>aaaaa</fo:block>
.......
<fo:block id="endContent">aaaaa</fo:block>
</fo:flow>
</fo:page-sequence>
</fo:root>
而我的结果，黄色区域是<fo:region-body/>，红色矩形是<fo:region-before/>，我希望 黄色区域 在 红色矩形 和 红色矩形 之后立即在所有页面上重复
最简单的答案是将所有内容都放在 fo:table 中，当前页 header 放在 fo:table-header 中，每个页都重复。
一个更复杂的解决方案是在 XSLT 转换期间使用 https://github.com/pplcg/XSLTExtensions 的打印和页面布局社区组的 XSLT 扩展到 运行 格式化程序以获得 header 内容，以便您可以准确计算出它需要多少高度。但是，<#assign 和其他标记让我认为您可能没有太多访问 XSLT 处理器的权限，并且可能无法将其配置为使用扩展。
在我的 pdf 文档中，我希望一些数据在所有页面上重复，所以我将它们放在 <fo:region-before/> 中。这就导致了区域的高度不固定。我想计算这个区域的高度，把 <fo:region-body/> 的数据放在合适的位置，但我不知道该怎么做？这是我的代码：
<#assign imageBorderWidth=0.4/>
<#assign logoHeight=0.5/>
<#assign regionAfterBlockHeight=0.22/>
<#assign regionAfterHeight=regionAfterBlockHeight * 4/>
<#setting locale="en_US">
<fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format" font-family="ArialUni, ArialUniBold, ArialUniItalic" font-size="10pt">
<fo:layout-master-set>
<fo:simple-page-master master-name="letter-portrait" page-width="8.5in" page-height="11in"
margin-top="0" margin-bottom="0" margin-left="0in" margin-right="0in">
<fo:region-body margin-top="5in" margin-bottom="${regionAfterHeight}in"
margin-left="${imageBorderWidth}in" margin-right="${imageBorderWidth}in" background-color="yellow"/>
<fo:region-before extent="2in" />
<fo:region-after extent="${regionAfterHeight}in"/>
</fo:simple-page-master>
</fo:layout-master-set>
<fo:page-sequence master-reference="letter-portrait" id="mainSequence">
<fo:static-content flow-name="xsl-region-before">
<fo:block-container absolute-position="absolute" top="0" left="0">
<fo:block>
<fo:external-graphic src="${backgroundLocation.getLocation()}" content-height="11in" content-width="8.5in" scaling="non-uniform"/>
</fo:block>
</fo:block-container>
<#--Header Hóa đơn GTGT, logo, mẫu số-->
<fo:table table-layout="fixed" width="100%">
<fo:table-body>
<fo:table-row>
<fo:table-cell padding="0.5in 0.5in 0in 0.5in" text-align="center" width="2.5in">
<fo:block>
<#if logoLocation?has_content>
<fo:external-graphic src="${logoLocation.getLocation()}" content-width="2in" content-height="${logoHeight}in" scaling="non-uniform"/>
<#else >
<fo:leader />
</#if>
</fo:block>
</fo:table-cell>
<fo:table-cell text-align="center" width="3.5in" padding-top="${imageBorderWidth}in" display-align="center ">
<fo:block-container height="0.34in">
<fo:block font-size="14pt" font-family="ArialUniBold" text-align="center">
HÓA ĐƠN GIÁ TRỊ GIA TĂNG
</fo:block>
</fo:block-container>
<fo:block-container height="0.27in">
<fo:block>
<fo:inline font-style="italic">(Bản thể hiện của hóa đơn điện tử)</fo:inline>
</fo:block>
</fo:block-container>
<fo:block-container height="0.27in">
<fo:block>
<fo:inline font-style="italic">Ngày tháng năm</fo:inline>
</fo:block>
</fo:block-container>
</fo:table-cell>
<fo:table-cell text-align="center" width="2in" padding-top="${imageBorderWidth}in" display-align="center">
<fo:table table-layout="fixed" width="100%" >
<fo:table-column column-width="30%"/>
<fo:table-column column-width="60%"/>
<fo:table-body>
<fo:table-row>
<fo:table-cell text-align="left">
<fo:block-container height="0.27in">
<fo:block><fo:inline>Form no:</fo:inline></fo:block>
</fo:block-container>
</fo:table-cell>
<fo:table-cell text-align="left">
<fo:block-container height="0.27in">
<fo:block><fo:inline>01GTKT0/001</fo:inline></fo:block>
</fo:block-container>
</fo:table-cell>
</fo:table-row>
<fo:table-row>
<fo:table-cell text-align="left">
<fo:block-container height="0.27in">
<fo:block><fo:inline>Sign:</fo:inline></fo:block>
</fo:block-container>
</fo:table-cell>
<fo:table-cell text-align="left">
<fo:block-container height="0.27in">
<fo:block><fo:inline>AB/21E</fo:inline></fo:block>
</fo:block-container>
</fo:table-cell>
</fo:table-row>
<fo:table-row>
<fo:table-cell text-align="left">
<fo:block-container height="0.27in">
<fo:block><fo:inline>No:</fo:inline></fo:block>
</fo:block-container>
</fo:table-cell>
<fo:table-cell text-align="left">
<fo:block-container height="0.27in">
<fo:block><fo:inline>000001</fo:inline></fo:block>
</fo:block-container>
</fo:table-cell>
</fo:table-row>
</fo:table-body>
</fo:table>
</fo:table-cell>
</fo:table-row>
</fo:table-body>
</fo:table>
<fo:block border-bottom-width="1.5pt" margin="0 ${imageBorderWidth}in 0 ${imageBorderWidth}in " border-bottom-style="solid" margin-top="3mm" border-bottom-color="#b7b7b7" />
<fo:table table-layout="fixed" width="100%" margin-top="0.1in" font-size="10pt">
<fo:table-column column-width="80%"/>
<fo:table-column column-width="20%"/>
<fo:table-body>
<fo:table-row>
<fo:table-cell text-align="left" padding-left="${imageBorderWidth}in">
<fo:block font-size="15pt" font-family="ArialUniBold" line-height="1.4"><fo:inline>CÔNG TY TNHH QUẢN LÝ NỢ VÀ KHAI THÁC TÀI SẢN NGÂN HÀNG TMCP BẮC Á - CHI NHÁNH THÀNH PHỐ HỒ CHÍ MINH</fo:inline></fo:block>
</fo:table-cell>
<fo:table-cell text-align="center" number-rows-spanned="5" display-align="before" padding-right="${imageBorderWidth}in">
<fo:block>
<#assign qrContentWidth=(8.5*0.2) - imageBorderWidth/>
<fo:external-graphic src="${qrCodeImgLocation.getLocation()}" content-width="${qrContentWidth}in" content-height="scale-to-fit" scaling="uniform"/>
</fo:block>
</fo:table-cell>
</fo:table-row>
<fo:table-row>
<fo:table-cell text-align="left" padding-left="${imageBorderWidth}in">
<fo:block line-height="1.8"><fo:inline>Taxcode: 0101243150-999</fo:inline></fo:block>
</fo:table-cell>
</fo:table-row>
<fo:table-row>
<fo:table-cell text-align="left" padding-left="${imageBorderWidth}in">
<fo:block line-height="1.8">
<fo:table inline-progression-dimension="auto" table-layout="auto">
<fo:table-column column-number="1" column-width="45pt" />
<fo:table-column column-number="2"/>
<fo:table-body>
<fo:table-row>
<fo:table-cell text-align="left" padding="0">
<fo:block>Address:</fo:block>
</fo:table-cell>
<fo:table-cell text-align="left" padding="0">
<fo:block>Số 36A Phan Đăng Lưu, Phường 05, Quận Phú Nhuận, Thành phố Hồ Chí Minh, Việt Nam</fo:block>
</fo:table-cell>
</fo:table-row>
</fo:table-body>
</fo:table>
</fo:block>
</fo:table-cell>
</fo:table-row>
<fo:table-row>
<fo:table-cell text-align="left" padding-left="${imageBorderWidth}in">
<fo:block line-height="1.8"><fo:inline>Phone: 028.38229812</fo:inline></fo:block>
</fo:table-cell>
</fo:table-row>
<fo:table-row>
<fo:table-cell text-align="left" padding-left="${imageBorderWidth}in">
<fo:block line-height="1.8"><fo:inline>Bank Account:</fo:inline></fo:block>
</fo:table-cell>
</fo:table-row>
</fo:table-body>
</fo:table>
<fo:block border-bottom-width="1.5pt" margin="0 ${imageBorderWidth}in 0 ${imageBorderWidth}in " border-bottom-style="solid" margin-top="1mm" border-bottom-color="#b7b7b7" />
</fo:static-content>
<fo:static-content flow-name="xsl-region-after" font-size="9pt" >
<fo:table table-layout="fixed" width="100%" >
<fo:table-column column-width="90%"/>
<fo:table-column column-width="10%"/>
<fo:table-body>
<fo:table-row>
<fo:table-cell text-align="left" padding-left="${imageBorderWidth}in">
<fo:block-container height="${regionAfterBlockHeight}in"><fo:block text-align="left">Tra cứu tại Website: https://www.meinvoice.vn/tra-cuu - Mã tra cứu hóa đơn:</fo:block></fo:block-container>
</fo:table-cell>
<fo:table-cell/>
</fo:table-row>
<fo:table-row>
<fo:table-cell >
<fo:block-container height="${regionAfterBlockHeight}in"><fo:block text-align="center">(Cần kiểm tra, đối chiếu khi lập, giao, nhận hóa đơn)</fo:block></fo:block-container>
</fo:table-cell>
<fo:table-cell/>
</fo:table-row>
<fo:table-row>
<fo:table-cell>
<fo:block-container height="${regionAfterBlockHeight}in"><fo:block text-align="center">Phát hành bởi phần mềm MISA meInvoice - Công ty Cổ phần MISA (www.misa.com.vn) - MST: 0101243150</fo:block></fo:block-container>
</fo:table-cell>
<fo:table-cell padding-right="${imageBorderWidth}in">
<fo:block-container height="${regionAfterBlockHeight}in">
<fo:block>
<fo:block text-align="right"><fo:page-number/>/<fo:page-number-citation-last ref-id="endContent"/></fo:block>
</fo:block>
</fo:block-container>
</fo:table-cell>
</fo:table-row>
</fo:table-body>
</fo:table>
</fo:static-content>
<fo:flow flow-name="xsl-region-body" >
<fo:block>aaaaa</fo:block>
<fo:block>aaaaa</fo:block>
<fo:block>aaaaa</fo:block>
<fo:block>aaaaa</fo:block>
<fo:block>aaaaa</fo:block>
<fo:block>aaaaa</fo:block>
<fo:block>aaaaa</fo:block>
<fo:block>aaaaa</fo:block>
<fo:block>aaaaa</fo:block>
<fo:block>aaaaa</fo:block>
<fo:block>aaaaa</fo:block>
<fo:block>aaaaa</fo:block>
.......
<fo:block id="endContent">aaaaa</fo:block>
</fo:flow>
</fo:page-sequence>
</fo:root>
而我的结果，黄色区域是<fo:region-body/>，红色矩形是<fo:region-before/>，我希望 黄色区域 在 红色矩形 和 红色矩形 之后立即在所有页面上重复
最简单的答案是将所有内容都放在 fo:table 中，当前页 header 放在 fo:table-header 中，每个页都重复。
一个更复杂的解决方案是在 XSLT 转换期间使用 https://github.com/pplcg/XSLTExtensions 的打印和页面布局社区组的 XSLT 扩展到 运行 格式化程序以获得 header 内容，以便您可以准确计算出它需要多少高度。但是，<#assign 和其他标记让我认为您可能没有太多访问 XSLT 处理器的权限，并且可能无法将其配置为使用扩展。