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1 | 1 | import {svg} from '../svg.js';
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2 | 2 |
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3 |
| -const headingSelector = '.markup h1, .markup h2, .markup h3, .markup h4, .markup h5, .markup h6'; |
4 |
| - |
5 | 3 | // scroll to anchor while respecting the `user-content` prefix that exists on the target
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6 |
| -function scrollToAnchor(hash, initial) { |
| 4 | +function scrollToAnchor(encodedId, initial) { |
7 | 5 | // abort if the browser has already scrolled to another anchor during page load
|
8 |
| - if (initial && document.querySelector(':target')) return; |
9 |
| - if (hash?.length <= 1) return; |
10 |
| - const id = decodeURIComponent(hash.substring(1)); |
11 |
| - const el = document.getElementById(`user-content-${id}`); |
12 |
| - if (el) { |
13 |
| - el.scrollIntoView(); |
14 |
| - } else if (id.startsWith('user-content-')) { // compat for links with old 'user-content-' prefixed hashes |
| 6 | + if (!encodedId || (initial && document.querySelector(':target'))) return; |
| 7 | + const id = decodeURIComponent(encodedId); |
| 8 | + let el = document.getElementById(`user-content-${id}`); |
| 9 | + |
| 10 | + // check for matching user-generated `a[name]` |
| 11 | + if (!el) { |
| 12 | + const nameAnchors = document.getElementsByName(`user-content-${id}`); |
| 13 | + if (nameAnchors.length) { |
| 14 | + el = nameAnchors[0]; |
| 15 | + } |
| 16 | + } |
| 17 | + |
| 18 | + // compat for links with old 'user-content-' prefixed hashes |
| 19 | + if (!el && id.startsWith('user-content-')) { |
15 | 20 | const el = document.getElementById(id);
|
16 | 21 | if (el) el.scrollIntoView();
|
17 | 22 | }
|
| 23 | + |
| 24 | + if (el) { |
| 25 | + el.scrollIntoView(); |
| 26 | + } |
18 | 27 | }
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19 | 28 |
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20 | 29 | export function initMarkupAnchors() {
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21 |
| - if (!document.querySelector('.markup')) return; |
22 |
| - |
23 |
| - // create link icons for markup headings, the resulting link href will remove `user-content-` |
24 |
| - for (const heading of document.querySelectorAll(headingSelector)) { |
25 |
| - const originalId = heading.id.replace(/^user-content-/, ''); |
26 |
| - const a = document.createElement('a'); |
27 |
| - a.classList.add('anchor'); |
28 |
| - a.setAttribute('href', `#${encodeURIComponent(originalId)}`); |
29 |
| - a.innerHTML = svg('octicon-link'); |
30 |
| - a.addEventListener('click', (e) => { |
31 |
| - scrollToAnchor(e.currentTarget.getAttribute('href'), false); |
32 |
| - }); |
33 |
| - heading.prepend(a); |
34 |
| - } |
| 30 | + const markupEls = document.querySelectorAll('.markup'); |
| 31 | + if (!markupEls.length) return; |
| 32 | + |
| 33 | + for (const markupEl of markupEls) { |
| 34 | + // create link icons for markup headings, the resulting link href will remove `user-content-` |
| 35 | + for (const heading of markupEl.querySelectorAll(`:is(h1, h2, h3, h4, h5, h6`)) { |
| 36 | + const originalId = heading.id.replace(/^user-content-/, ''); |
| 37 | + const a = document.createElement('a'); |
| 38 | + a.classList.add('anchor'); |
| 39 | + a.setAttribute('href', `#${encodeURIComponent(originalId)}`); |
| 40 | + a.innerHTML = svg('octicon-link'); |
| 41 | + heading.prepend(a); |
| 42 | + } |
| 43 | + |
| 44 | + // remove `user-content-` prefix from links so they don't show in url bar when clicked |
| 45 | + for (const a of markupEl.querySelectorAll('a[href^="#"]')) { |
| 46 | + const href = a.getAttribute('href'); |
| 47 | + if (!href.startsWith('#user-content-')) continue; |
| 48 | + const originalId = href.replace(/^#user-content-/, ''); |
| 49 | + a.setAttribute('href', `#${originalId}`); |
| 50 | + } |
| 51 | + |
| 52 | + // add `user-content-` prefix to user-generated `a[name]` link targets |
| 53 | + // TODO: this prefix should be added in backend instead |
| 54 | + for (const a of markupEl.querySelectorAll('a[name]')) { |
| 55 | + const name = a.getAttribute('name'); |
| 56 | + if (!name) continue; |
| 57 | + a.setAttribute('name', `user-content-${a.name}`); |
| 58 | + } |
35 | 59 |
|
36 |
| - // handle user-defined `name` anchors like `[Link](#link)` linking to `<a name="link"></a>Link` |
37 |
| - for (const a of document.querySelectorAll('.markup a[href^="#"]')) { |
38 |
| - const href = a.getAttribute('href'); |
39 |
| - if (!href.startsWith('#user-content-')) continue; |
40 |
| - const originalId = href.replace(/^#user-content-/, ''); |
41 |
| - a.setAttribute('href', `#${encodeURIComponent(originalId)}`); |
42 |
| - if (a.closest('.markup').querySelectorAll(`a[name="${originalId}"]`).length !== 1) { |
| 60 | + for (const a of markupEl.querySelectorAll('a[href^="#"]')) { |
43 | 61 | a.addEventListener('click', (e) => {
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44 |
| - scrollToAnchor(e.currentTarget.getAttribute('href'), false); |
| 62 | + scrollToAnchor(e.currentTarget.getAttribute('href')?.substring(1), false); |
45 | 63 | });
|
46 | 64 | }
|
47 | 65 | }
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48 | 66 |
|
49 |
| - scrollToAnchor(window.location.hash, true); |
| 67 | + scrollToAnchor(window.location.hash.substring(1), true); |
50 | 68 | }
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