{{-- 知识点正文：与 pdf.exam-knowledge-explanation（知识点组卷前置梳理）同一套容器与数据（buildExplanations + normalizeKpExplanation） --}}
@if(empty($knowledgePoints))
暂无知识点数据
@else
@foreach($knowledgePoints as $point)
{{ $loop->iteration }}、{{ $point['kp_name'] ?? ($point['kp_code'] ?? '未命名知识点') }}
@if(!empty($point['explanation']))
{!! $point['explanation'] !!}
@endif
@if(!empty($point['cases']))
@php
// 与卷子题干一致的小题号断行逻辑（仅在至少2个小题编号时生效）
$formatStemLikePaper = function (?string $text): string {
$stem = trim((string) $text);
if ($stem === '') {
return '—';
}
preg_match_all('/[（(][1-9][0-9]*[）)]/u', $stem, $subQuestionMatches);
$subQuestionCount = count($subQuestionMatches[0] ?? []);
if ($subQuestionCount >= 2) {
$stem = preg_replace('/^\s*([（(][1-9][0-9]*[）)])\s*/u', '$1 ', $stem) ?? $stem;
// 断行后保留两个中文空格缩进
$stem = preg_replace('/([。；;！？!?:：.])\s*([（(][1-9][0-9]*[）)])\s*/u', '$1
$2 ', $stem) ?? $stem;
$stem = preg_replace('/(?:(?:\\\\r\\\\n|\\\\n)|(?:\r?\n)|(?:
)|\s)+\s*([（(][1-9][0-9]*[）)])\s*/u', '
$1 ', $stem) ?? $stem;
$stem = preg_replace('/(求出|求解|求|写出|计算|证明|判断|化简)\s*([（(][1-9][0-9]*[）)])\s*/u', '$1
$2 ', $stem) ?? $stem;
}
return $stem;
};
$markComplexDisplayMath = function (string $html): string {
return preg_replace_callback(
'/]*\bclass="[^"]*\bkatex-display\b[^"]*"[^>]*)>(.*?)<\/span>/isu',
static function (array $matches): string {
$attrs = $matches[1] ?? '';
$content = $matches[2] ?? '';
$isComplex = str_contains($content, 'mfrac') || str_contains($content, 'vlist');
if (!$isComplex || str_contains($attrs, 'complex-display-math')) {
return $matches[0];
}
$attrs = preg_replace('/\bclass="([^"]*)"/u', 'class="$1 complex-display-math"', $attrs, 1) ?? $attrs;
return '' . $content . '';
},
$html
) ?? $html;
};
// 解析：移除“讲解/解析”前缀，结构化分析/详解小标题，并保守处理步骤换行
$formatSolution = function (?string $text) use ($markComplexDisplayMath): string {
$solution = trim((string) $text);
if ($solution === '') {
return '—';
}
$solution = preg_replace('/^\s*[【\[]?\s*(讲解|解析)\s*[】\]]?\s*[:：]\s*/u', '', $solution) ?? $solution;
$solution = preg_replace('/\s*【\s*(分析|详解|点睛)\s*】\s*/u', '$1
', $solution) ?? $solution;
$solution = preg_replace('/\s*\[\s*(分析|详解|点睛)\s*\]\s*/u', '$1
', $solution) ?? $solution;
$solution = preg_replace('/\s*(步骤\s*[0-9一二三四五六七八九十百零两]+\s*[：:]?)/u', '
$1', $solution) ?? $solution;
$solution = preg_replace('/\s*(第\s*[0-9一二三四五六七八九十百零两]+\s*步\s*[：:]?)/u', '
$1', $solution) ?? $solution;
$plainLength = mb_strlen(strip_tags($solution), 'UTF-8');
if ($plainLength > 160) {
$solution = preg_replace('/([。；])\s*/u', '$1
', $solution) ?? $solution;
}
$solution = preg_replace('/(<\/div>)\s*
\s*(步骤\s*[0-9一二三四五六七八九十百零两]+\s*[：:]?)/u', '$1$2', $solution) ?? $solution;
$solution = preg_replace('/(<\/div>)\s*
\s*(第\s*[0-9一二三四五六七八九十百零两]+\s*步\s*[：:]?)/u', '$1$2', $solution) ?? $solution;
$solution = preg_replace('/^(?:\s*\s*)+/iu', '', $solution) ?? $solution;
$solution = preg_replace('/(?:
\s*){2,}/u', '
', $solution) ?? $solution;
$solution = preg_replace('/(?:\s*
\s*)*()/u', '$1', $solution) ?? $solution;
$solution = $markComplexDisplayMath($solution);
// 将「分析/详解」转换为可分页语义块：标题 + 内容。
// 仅短小纯文本节绑定；含图/display 公式的节允许自然分页，减少整块推页空白。
$caseSectionClass = static function (string $body, bool $hasTitle = true): string {
$plainLength = mb_strlen(trim(strip_tags($body)), 'UTF-8');
$containsImage = str_contains($body, '
(.*?)<\/div>/u', $solution, -1, PREG_SPLIT_DELIM_CAPTURE);
if (is_array($chunks) && count($chunks) > 1) {
$sectionHtml = '';
$lead = trim((string) ($chunks[0] ?? ''));
if ($lead !== '') {
$leadClass = $caseSectionClass($lead, false);
$sectionHtml .= '';
}
for ($i = 1; $i < count($chunks); $i += 2) {
$title = trim((string) ($chunks[$i] ?? ''));
$body = trim((string) ($chunks[$i + 1] ?? ''));
if ($title === '' && $body === '') {
continue;
}
$sectionClass = $caseSectionClass($body, true);
$sectionHtml .= '' . $title . '
' . $body . '
案例分析
@foreach($point['cases'] as $case)
@php
$sourceText = '';
if (!empty($case['child_kp_name'])) {
// 只展示子知识点来源，不展示父知识点名称
$sourceText = trim((string) $case['child_kp_name']);
$parentName = trim((string) ($point['kp_name'] ?? ''));
if ($parentName !== '') {
$escapedParent = preg_quote($parentName, '/');
$sourceText = preg_replace('/^' . $escapedParent . '\s*[-—－\/]\s*/u', '', $sourceText) ?? $sourceText;
}
if (preg_match('/[-—－\/]/u', $sourceText)) {
$parts = preg_split('/\s*[-—－\/]\s*/u', $sourceText);
if (is_array($parts) && !empty($parts)) {
$sourceText = trim((string) end($parts));
}
}
} elseif (!empty($case['is_wrong_case'])) {
$sourceText = '错题讲解';
} elseif (($case['source_type'] ?? '') === 'reviewed') {
$sourceText = '已做题';
} elseif (($case['source_type'] ?? '') === 'fallback') {
$sourceText = '补充题';
}
@endphp
@php
$stemLine = trim((string) ($case['stem'] ?? ''));
if ($stemLine === '') {
$renderedStemHtml = '—';
} else {
[$renderedStemHtml] = \App\Support\BlankPlaceholderRenderer::replaceToBlankSpan($stemLine, null, true, false);
$renderedStemHtml = \App\Support\BlankPlaceholderRenderer::normalizeTerminalPunctuation($renderedStemHtml, 'remove');
$renderedStemHtml = $formatStemLikePaper($renderedStemHtml);
$renderedStemHtml = \App\Services\MathFormulaProcessor::processFormulas($renderedStemHtml);
$renderedStemHtml = $markComplexDisplayMath($renderedStemHtml);
}
@endphp
例{{ $loop->iteration }}.
@if($sourceText !== '')
（{{ $sourceText }}）
@endif
{!! $renderedStemHtml !!}
@php
$options = (array) ($case['options'] ?? []);
@endphp
@if(!empty($options))
@include('pdf.partials.exam-choice-options', [
'options' => $options,
'gradingMode' => false,
'mathProcessed' => false,
'logQuestionNumber' => 'kp-' . ($case['question_id'] ?? $loop->iteration),
'showLeadSpacer' => false,
])
@endif
@endforeach
@endif