82 lines
2.4 KiB
JavaScript
82 lines
2.4 KiB
JavaScript
/**
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* 标题行首序号：1 / 1.1 / 1.2.3 / 1. / 1) 等（不含 2024 这类四位年份）
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*/
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const HEADING_NUMBER_PREFIX_RE =
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/^\s*(?:(?:\d+\.)+\d+|\d{1,2}[\.\):：]|\d{1,2}(?=\s+[^\d]))[\.\):：]?\s+/;
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export function stripHeadingNumberPrefix(text) {
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return String(text || '').replace(HEADING_NUMBER_PREFIX_RE, '');
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}
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export function hasHeadingNumberPrefix(text) {
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return HEADING_NUMBER_PREFIX_RE.test(String(text || ''));
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}
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function htmlToPlainText(html) {
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if (typeof document !== 'undefined') {
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const node = document.createElement('div');
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node.innerHTML = String(html || '');
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return (node.textContent || node.innerText || '').replace(/\u00a0/g, ' ');
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}
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return String(html || '')
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.replace(/<[^>]+>/g, '')
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.replace(/ /g, ' ')
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.replace(/\s+/g, ' ')
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.trim();
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}
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export function headingHtmlHasNumberPrefix(html) {
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return hasHeadingNumberPrefix(htmlToPlainText(html));
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}
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/** 去掉 HTML 标题内容中首个非空文本节点前的序号 */
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export function stripHeadingNumberFromHtml(html) {
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if (typeof document === 'undefined') {
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const plain = htmlToPlainText(html);
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if (!hasHeadingNumberPrefix(plain)) {
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return html;
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}
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return String(html || '').replace(HEADING_NUMBER_PREFIX_RE, '');
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}
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const div = document.createElement('div');
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div.innerHTML = html || '';
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const walker = document.createTreeWalker(div, NodeFilter.SHOW_TEXT, null);
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let node;
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while ((node = walker.nextNode())) {
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const raw = node.textContent || '';
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if (!raw.trim()) {
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continue;
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}
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const stripped = stripHeadingNumberPrefix(raw);
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if (stripped !== raw) {
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node.textContent = stripped;
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}
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break;
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}
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return div.innerHTML;
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}
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/** 从正文列表中收集需去掉序号的 H1/H2 标题 */
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export function collectHeadingNumberStripUpdates(contentList) {
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const list = contentList || [];
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const updates = [];
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list.forEach(function (item) {
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if (!item || (item.is_h1 != 1 && item.is_h2 != 1)) {
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return;
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}
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const original = item.content || '';
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const next = stripHeadingNumberFromHtml(original);
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if (next !== original) {
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updates.push({
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am_id: item.am_id,
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content: next,
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original: original
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});
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}
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});
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return updates;
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}
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