math_cms/resources/views/pdf/partials/exam-choice-options.blade.php

{{--
  与 components/exam/paper-body 选择题选项渲染完全一致（布局 + 公式预处理）。
  参数：
  - $options: array 选项（数字下标或 A/B/C/D 键）
  - $gradingMode: bool 是否判卷上下文（影响 OptionLayoutDecider）
  - $mathProcessed: bool 题目是否已整体预处理公式
  - $logQuestionNumber: string|int 仅用于日志标识
  - $showLeadSpacer: bool 是否在选项前插入与 question-grid 对齐的隐形占位（嵌入案例行等非 grid 场景可设为 false）
--}}
@php
    /** @var array $options */
    /** @var bool $gradingMode */
    /** @var bool $mathProcessed */
    /** @var string|int|null $logQuestionNumber */
    /** @var bool $showLeadSpacer */
    $showLeadSpacer = $showLeadSpacer ?? true;
    $layoutDeciderService = app(\App\Support\OptionLayoutDecider::class);
    $layoutMeta = $layoutDeciderService->decide(
        $options,
        $gradingMode ? 'grading' : 'exam'
    );
    $optionsClass = $layoutMeta['class'];
    $layoutDesc = $layoutMeta['layout'];
    $hasImageOptionInQuestion = false;
    foreach ($options as $optRaw) {
        if (preg_match('/<(img|image|svg)\\b|data:image\\//i', (string) $optRaw) === 1) {
            $hasImageOptionInQuestion = true;
            break;
        }
    }
    if ($hasImageOptionInQuestion) {
        $optionsClass = 'options-grid-4';
        $layoutDesc = '4列布局(图片选项固定)';
    }

    \Illuminate\Support\Facades\Log::debug('选择题布局决策', [
        'question_number' => $logQuestionNumber ?? null,
        'context' => $gradingMode ? 'grading' : 'exam',
        'opt_count' => $layoutMeta['opt_count'],
        'max_length' => $layoutMeta['max_length'],
        'has_complex_formula' => $layoutMeta['has_complex_formula'],
        'has_image_option' => $hasImageOptionInQuestion,
        'selected_class' => $optionsClass,
        'layout' => $layoutDesc,
    ]);
@endphp
@if($showLeadSpacer)
    <div class="question-lead spacer"></div>
@endif
<div class="{{ $optionsClass }}">
    @foreach($options as $optIndex => $opt)
        @php
            // 兼容两种格式：数字索引 (0,1,2,3) 或字母键 (A,B,C,D)
            if (is_numeric($optIndex)) {
                $label = chr(65 + (int) $optIndex);
            } else {
                $label = strtoupper($optIndex);
            }
            // 【修复】根据是否已预处理决定处理方式
            $normalizedOpt = (string) $opt;
            // 选项内优先使用行内分式，避免 \dfrac 导致单个选项视觉突兀
            $normalizedOpt = str_replace('\\dfrac', '\\frac', $normalizedOpt);
            $normalizedOpt = str_replace('\\displaystyle', '', $normalizedOpt);
            $normalizedOpt = $layoutDeciderService->normalizeCompactMathForDisplay($normalizedOpt);
            // 清理来源HTML里可能携带的超大字号，避免单题选项异常放大
            $normalizedOpt = preg_replace('/font-size\s*:[^;"]+;?/iu', '', $normalizedOpt);
            $normalizedOpt = preg_replace('/line-height\s*:[^;"]+;?/iu', '', $normalizedOpt);
            $normalizedOpt = preg_replace('/style\s*=\s*([\'"])\s*\1/iu', '', $normalizedOpt);

            if ($mathProcessed) {
                // 已预处理：数据已包含处理好的 <img> 和公式，直接使用
                $renderedOpt = $normalizedOpt;
            } else {
                // 未预处理：先转义保护，processFormulas() 内部会解码并处理
                $encodedOpt = htmlspecialchars($normalizedOpt, ENT_QUOTES | ENT_HTML5, 'UTF-8');
                $renderedOpt = \App\Services\MathFormulaProcessor::processFormulas($encodedOpt);
            }
            // 仅针对“选项图片”覆盖公式处理器默认的题干尺寸，避免四列布局被 220px 宽图撑出边界
            $renderedOpt = preg_replace('/max-width\s*:\s*220px\s*;?/iu', 'max-width:100%;', (string) $renderedOpt);
            $renderedOpt = preg_replace('/max-height\s*:\s*60mm\s*;?/iu', 'max-height:28mm;', (string) $renderedOpt);
            // 标记选项内图片，供 PDF 全局宽图放大逻辑识别并跳过
            $renderedOpt = preg_replace('/<img\b(?![^>]*\bdata-option-image=)/iu', '<img data-option-image="1"', (string) $renderedOpt);
            // 兼容未来选项直接使用 <svg> 的场景，同样打标走选项专用规则
            $renderedOpt = preg_replace('/<svg\b(?![^>]*\bdata-option-image=)/iu', '<svg data-option-image="1"', (string) $renderedOpt);

            // 细粒度控制：短选项（如 1/2、-1/3、x、-x）尽量单行展示，长选项允许换行
            $rawOptText = html_entity_decode(strip_tags((string) $opt), ENT_QUOTES | ENT_HTML5, 'UTF-8');
            $rawOptText = preg_replace('/\s+/u', '', $rawOptText ?? '');
            $rawOptLen = mb_strlen((string) $rawOptText, 'UTF-8');
            $isShortOption = $rawOptLen <= 8;
        @endphp
        @php $hasImageOption = preg_match('/<(img|image|svg)\\b|data:image\\//i', (string) $renderedOpt) === 1; @endphp
        <div class="option option-compact {{ $hasImageOption ? 'option-with-image' : '' }}">
            <strong>{{ $label }}.</strong>
            <span class="option-value {{ $isShortOption ? 'option-short' : 'option-long' }}">{!! $renderedOpt !!}</span>
        </div>
    @endforeach
</div>