math_cms/resources/views/pdf/partials/answer-detail-page.blade.php

@php
    $choiceQuestions = $questions['choice'] ?? [];
    $fillQuestions = $questions['fill'] ?? [];
    $answerQuestions = $questions['answer'] ?? [];

    $allQuestions = collect()
        ->concat($choiceQuestions)
        ->concat($fillQuestions)
        ->concat($answerQuestions)
        ->sortBy(fn ($q) => (int) ($q->question_number ?? 0))
        ->values();

    $normalizeQuickAnswer = function (?string $answer): string {
        $answer = trim((string) $answer);
        if ($answer === '') {
            return '—';
        }
        $answer = preg_replace('/\s+/u', ' ', $answer) ?? $answer;
        $answer = str_replace(['；', ';'], ' / ', $answer);

        return trim($answer);
    };

    $quickAnswers = $allQuestions->map(function ($q) use ($normalizeQuickAnswer) {
        $answerText = $normalizeQuickAnswer($q->answer ?? '');
        $isLong = mb_strlen(strip_tags($answerText)) > 20
            || str_contains($answerText, "\n")
            || str_contains($answerText, "\r")
            || str_contains($answerText, '{')
            || str_contains($answerText, '\\frac')
            || str_contains($answerText, '见解析');
        $processedAnswer = \App\Services\MathFormulaProcessor::processFormulas($answerText);
        // 速查统一为流式：移除显式换行
        $processedAnswer = preg_replace('/<br\s*\/?>/iu', ' ', $processedAnswer) ?? $processedAnswer;

        return [
            'no' => (int) ($q->question_number ?? 0),
            'answer' => $processedAnswer,
            'long' => $isLong,
            'extended' => false,
        ];
    })->values();

    $normalizeDetailHtml = function (?string $text): string {
        $text = trim((string) $text);
        if ($text === '') {
            return '';
        }
        $text = preg_replace('/font-size\s*:[^;"]+;?/iu', '', $text) ?? $text;
        $text = preg_replace('/line-height\s*:[^;"]+;?/iu', '', $text) ?? $text;
        $text = preg_replace('/style\s*=\s*([\'"])\s*\1/iu', '', $text) ?? $text;

        return $text;
    };

    $formatDetailForReadability = function (?string $text): string {
        $text = trim((string) $text);
        if ($text === '') {
            return '';
        }

        // 仅做轻量分行：遇到“步骤X”时换行，避免整段拥挤
        $text = preg_replace('/\s*(步骤\s*[0-9一二三四五六七八九十]+\s*[：:])/u', '<br>$1', $text) ?? $text;
        $text = preg_replace('/\s*(第\s*[0-9一二三四五六七八九十]+\s*步\s*[：:])/u', '<br>$1', $text) ?? $text;

        // 软换行点：分号后允许优先换行，缓解长公式串拥挤
        $text = str_replace(['；', ';'], ['；<wbr>', ';<wbr>'], $text);
        // 轻量语义断点：在“则/故/所以”前给换行机会，避免整段公式堆在一行
        $text = preg_replace('/，\s*(则|故|所以)/u', '，<br>$1', $text) ?? $text;

        // 清理重复换行
        $text = preg_replace('/(?:<br>\s*){2,}/u', '<br>', $text) ?? $text;

        return ltrim($text, '<br>');
    };

    $renderAnswerSolutionWithStepBoxes = function (string $solutionHtml): string {
        $solution = trim($solutionHtml);
        if ($solution === '' || $solution === '（无详解）') {
            return $solutionHtml;
        }

        // 去掉分步得分等分值标记，与判卷页一致
        $solution = preg_replace('/（\s*\d+\s*分\s*）/u', '', $solution) ?? $solution;

        // 与判卷页一致：优先识别“步骤X / 第X步”
        if (preg_match('/(步骤\s*\d+|第\s*\d+\s*步)/u', $solution)) {
            $parts = preg_split('/(?=步骤\s*\d+|第\s*\d+\s*步)/u', $solution, -1, PREG_SPLIT_NO_EMPTY) ?: [];
            $processed = '';
            foreach ($parts as $index => $part) {
                $stepText = trim((string) $part);
                if ($stepText === '') {
                    continue;
                }
                $prefix = $index > 0 ? '<br>' : '';
                $isStep = preg_match('/^(步骤\s*\d+|第\s*\d+\s*步)/u', $stepText);
                if ($isStep) {
                    $processed .= $prefix
                        . '<span class="solution-step"><span class="step-box"><span class="detail-grade-box"></span></span><span class="step-label">'
                        . $stepText
                        . '</span></span>';
                } else {
                    // 与判卷页保持一致：步骤前引导语不加方框
                    $processed .= $prefix . '<span class="step-label">' . $stepText . '</span>';
                }
            }

            return $processed !== '' ? $processed : $solution;
        }

        // 无步骤关键词：与判卷页一致，在解析开头加一个判分框
        return '<span class="solution-step"><span class="step-box"><span class="detail-grade-box"></span></span><span class="step-label">'
            . $solution
            . '</span></span>';
    };

@endphp

<div class="answer-detail-page">
    <div class="answer-quick">
        <div class="answer-quick-label">答案速查</div>
        <div class="answer-quick-flow answer-quick-flow-ordered">
            @foreach($quickAnswers as $item)
                <span class="answer-quick-item {{ $item['long'] ? 'answer-quick-item-long' : 'answer-quick-item-compact' }}">
                    <strong>{{ $item['no'] }}.&nbsp;</strong>{!! $item['answer'] !!}
                </span>
            @endforeach
        </div>
    </div>

    <div class="answer-detail-two-cols">
        @foreach($allQuestions as $q)
            @php
                $no = (int) ($q->question_number ?? 0);
                $questionType = strtolower((string) ($q->question_type ?? ''));
                $isAnswerType = $questionType === 'answer';
                $rawAnswer = trim((string) ($q->answer ?? ''));
                $rawSolution = $normalizeDetailHtml($q->solution ?? '');
                $isSeeSolutionAnswer = (bool) preg_match('/^见\s*解析[。\.]?$|^详见解析/u', $rawAnswer);

                $renderAnswer = $rawAnswer !== ''
                    ? \App\Services\MathFormulaProcessor::processFormulas($rawAnswer)
                    : '—';
                $renderSolution = $rawSolution !== ''
                    ? \App\Services\MathFormulaProcessor::processFormulas($formatDetailForReadability($rawSolution))
                    : '（无详解）';
                if ($isAnswerType) {
                    $renderSolution = $renderAnswerSolutionWithStepBoxes($renderSolution);
                }
            @endphp
            <div class="answer-detail-item">
                <div class="entry-line">
                    <span class="entry-head">
                        <span class="qno">{{ $no }}.</span>
                        @if(!$isSeeSolutionAnswer)
                            <span class="answer-only">{!! $renderAnswer !!}</span>
                        @endif
                        <span class="analysis-tag">【解析】</span>
                    </span>
                    <span class="solution-only">{!! $renderSolution !!}</span>
                </div>
            </div>
        @endforeach
    </div>
</div>