mPDF - 基于元素高度的分页符

mPDF - Page break based on element height

我正在使用 mpdf in Laravel and with this package 版本 4.0

问题是我有一个不同高度的问题列表,其中有 4 个选项,我不知道每个 div 标签的确切高度和大致高度,其中有哪些问题和答案选项,我不希望我的部分问题转到另一页

我的问题的所有部分都必须在 一页 上,如果不能做到这一点,mpdf 会将问题标签元素放在下一页(问题的所有部分)

这张图是暂时的,错误的是:

我想要的:

This image

所以对于这个问题,我想知道我的问题元素的高度,这样我就可以确定新页面是否需要添加分页符(与 Whosebug 上的 this question 相同)或任何其他解决我的问题的方法

这是我的 blade 文件:

@php
    error_reporting(0);
@endphp

    <!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">

    <title>سوالات</title>

    <style>
        html, body {
            background-color: #fff;
            color: #636b6f;
            font-family: 'fa', sans-serif;
            direction: rtl;
        }

        .main-container{
            padding:20mm;
        }

        @page {
            footer: pagefooter;
            margin-top: 0pt;
        }

        @page:first {
            header: firstheader;
            margin-bottom: 200pt;
        }

        .item-answer{
            display: inline !important;
            width: 100%;
        }

        .sub-item-answer{
            float: left;
            display: inline !important;
            margin-top: 0 !important;
            padding-top: 0 !important;
            height: auto !important;
            margin-bottom: auto !important;
        }

        .sub-item-answer-num{
            width: 5%;
            float:right;
        }

        .q_1{
            margin-top: 45px !important;
        }

        .question{
            display: inline-block;
            page-break-inside: avoid !important;
            position: relative;
            float:right;
        }

        .question-row{
            display: inline !important;
            width: 100%;
        }

        .question-number{
            padding: 5px;
            background: #bebe27;
            border-radius: 10px;
            width:10% !important;
            text-align: center;
            color:#ffffff;
            font-weight: bold;
        }

        .main-question{
            width: 95% !important;
        }

        .row {
            margin-left: -15mm;
            margin-right: -15mm;
        }
    </style>
</head>
<body>
@php
    $i = 0;

@endphp

<htmlpageheader name="pageheader" style="display:none"></htmlpageheader>

<htmlpageheader name="firstheader">
    <img style="width: 100%;height:fit-content" src="http://api.amoozeshmelli.com/images/pdf/header.png" alt="header">
</htmlpageheader>

<sethtmlpageheader name="firstheader" value="on" show-this-page="1"/>

<sethtmlpageheader name="pageheader" value="on"/>

<div class="main-container container-fluid">

    @foreach($data as $question)
        @php
            $i++;
            $j=0;
        @endphp

        <div style="page-break-inside: avoid !important;" class="question q_{{$i}}">

            <div class="row question-row">

                <div class="question-number col-sm-1"> سوال{{$i}} </div>

                <div class="main-question col-sm-11">
                    @if($question->title)

                        {!! $question->title !!}

                        @if($question->image_url)
                            <img class="img-responsive" src="{{$question->image_url}}" alt="test">
                        @endif
                    @else
                        @if($question->image_url)
                            <img class="img-responsive" src="{{$question->image_url}}" alt="test">
                        @endif
                    @endif
                </div>

            </div>

            @if($question->options)
                <div class="question-main-container" style="float: right">
                    @foreach($question->options as $option)
                        @php
                            $j++;
                        @endphp
                        <div class="item-answer center-block row">
                            <div class="sub-item-answer-num col-sm-1">{{$j}})</div>
                            @if($option->title)
                                <div class="sub-item-answer col-sm-11">
                                    {!! $option->title !!}
                                    @if($option->image_url)
                                        <img style="width: auto; height:80px;" src="{{$option->image_url}}" alt="test" />
                                    @endif
                                </div>
                            @else
                                @if($option->image_url)
                                    <div class="sub-item-answer col-sm-11">
                                        <img style="width: auto; height:80px;" src="{{$option->image_url}}" alt="test" />
                                    </div>
                                @endif
                            @endif
                        </div>
                    @endforeach
                </div>

            @endif
            <hr>
        </div>
    @endforeach


</div>



<htmlpagefooter name="pagefooter">
    <p style="text-align: center;direction: rtl;">
        صفحه {PAGENO}
    </p>

    <img src="http://api.amoozeshmelli.com/images/pdf/footer.png" alt="header" style="z-index: 0 !important;width: 100%;">
</htmlpagefooter>

</body>
</html>

我尝试了 documentation of mpdf and this answer 中的所有方法,但结果没有用

如果有任何其他解决方案,请指导我

为您的区块使用 page-break-inside: avoid;(参见 https://mpdf.github.io/css-stylesheets/supported-css.html

经过多次尝试,问题解决了!

当我有一个块元素循环时,page-break-inside: avoid; 不起作用

我对每个问题都使用了 table 并将其放在主 table 和 <td> 标签中,内部 table 现在有 autosize="1" 这是需要的

另外,将此配置添加到 mPdf

$pdf->shrink_tables_to_fit = 1;

我将 page-break-inside: avoid 添加到主要 table 和 <tr> 循环中的问题

请注意,如果您遇到 undefined index error 尝试一般地解决它!但如果像我一样,它不固定使用 error_reporting(0);

更正后的 blade 文件:

@php
    error_reporting(0);
@endphp

    <!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">

    <title>سوالات</title>

    <style>
        html, body {
            background-color: #fff;
            color: #636b6f;
            font-family: 'fa', sans-serif;
            direction: rtl;
        }

        .main-container{
            padding:40mm 20mm 40mm 20mm;
        }

        @page {
            footer: pagefooter;
            margin-top: 0pt;
        }

        @page:first {
            header: firstheader;
            margin-bottom: 200pt;
        }

        .item-answer{
            display: inline !important;
            width: 100%;
        }

        p{
            font-size:35px;
        }

        .sub-item-answer{
            margin-top: 0 !important;
            padding-top: 0 !important;
            height: auto !important;
            margin-bottom: auto !important;
        }

        .sub-item-answer > img{
            width: 100% !important;
            min-height: 200px;
            max-height: 500px;
        }

        .sub-item-answer-num{
            width: 5%;
            font-size: 35px;
        }

        .q_1{
            margin-top: 45px !important;
        }

        .question-number{

            padding: 20px !important;
            background: #bebe27;
            border-radius: 10px !important;
            width:auto !important;
            text-align: center;
            color:#ffffff;
            font-weight: bold;
            height: auto;
            font-size: 35px;
        }


        .main-question{
            width: 95% !important;
            font-size:30px;
        }
        
        .main-question > p{
            font-size:30px !important;
        }

        .main-question > img{
            width: 100% !important;
            min-width: 800px !important;
            max-width: 1000px !important;
            min-height: 200px;
            max-height: 500px;
        }

        .row {
            margin-left: -15mm;
            margin-right: -15mm;
        }
    </style>
</head>
<body>

@php
    $i = 0;
@endphp

<htmlpageheader name="pageheader" style="display:none"></htmlpageheader>

<htmlpageheader name="firstheader">
    <img style="width: 100%;height:fit-content" src="http://api.amoozeshmelli.com/images/pdf/header.png" alt="header">
</htmlpageheader>

<sethtmlpageheader name="firstheader" value="on" show-this-page="1"/>

<sethtmlpageheader name="pageheader" value="on"/>

<div class="main-container container-fluid">
    <table style="page-break-inside: avoid !important;">
        @foreach($data as $question)
            @php
                $i++;
                $j=0;
            @endphp
        <tr style="page-break-inside: avoid !important; min-height: 300px;">
            <td>
            <table autosize="1">
                <tbody>
              <tr>
              <td><span  class="question-number"> سوال{{$i}} </span></td>
              <td class="main-question col-sm-11">
                            @if($question->title)

                                {!! $question->title !!}

                                @if($question->image_url)
                                    <img class="img-responsive" src="{{$question->image_url}}" alt="test">
                                @endif
                            @else
                                @if($question->image_url)
                                    <img class="img-responsive" src="{{$question->image_url}}" alt="test">
                                @endif
                            @endif
                        </td>
        </tr>

                    @if($question->options)

                            @foreach($question->options as $option)
                                <tr>
                                @php
                                    $j++;
                                @endphp
                                    <td class="sub-item-answer-num col-sm-1">{{$j}})</td>
                                    @if($option->title)
                                        <td class="sub-item-answer col-sm-11" style="font-size:35px !important;">
                                            {!! $option->title !!}
                                            @if($option->image_url)
                                                <img style="width: 100% !important;min-height: 200px;max-height: 500px;" src="{{$option->image_url}}" alt="test" />
                                            @endif
                                        </td>
                                    @else
                                        @if($option->image_url)
                                            <td class="sub-item-answer col-sm-11">
                                                <img style="width: 100% !important;min-height: 200px;max-height: 500px;" src="{{$option->image_url}}" alt="test" />
                                            </td>
                                        @endif
                                    @endif
                                </tr>
                            @endforeach
                    @endif
                </tbody>
            </table>
            </td>
        </tr>
        @endforeach
        
    </table>
</div>



<htmlpagefooter name="pagefooter">

    <p style="text-align: left;direction: rtl; font-size: 15px; margin-top: 50px; padding-left:100px">
        صفحه {PAGENO}
    </p>
    <img src="http://api.amoozeshmelli.com/images/pdf/footer.png" alt="header" style="width: 100%;">

</htmlpagefooter>

</body>
</html>