72 lines
1.8 KiB
JavaScript
72 lines
1.8 KiB
JavaScript
import { lookupCache } from 'pretty-text/oneboxer';
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// Given a node in the document and its parent, determine whether it is on its own line or not.
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function isOnOneLine(link, parent) {
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if (!parent) { return false; }
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const siblings = parent.slice(1);
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if ((!siblings) || (siblings.length < 1)) { return false; }
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const idx = siblings.indexOf(link);
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if (idx === -1) { return false; }
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if (idx > 0) {
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const prev = siblings[idx-1];
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if (prev[0] !== 'br') { return false; }
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}
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if (idx < siblings.length) {
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const next = siblings[idx+1];
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if (next && (!((next[0] === 'br') || (typeof next === 'string' && next.trim() === "")))) { return false; }
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}
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return true;
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}
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// We only onebox stuff that is on its own line.
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export function setup(helper) {
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if (helper.markdownIt) { return; }
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helper.onParseNode(event => {
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const node = event.node,
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path = event.path;
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// We only care about links
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if (node[0] !== 'a') { return; }
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const parent = path[path.length - 1];
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// We don't onebox bbcode
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if (node[1]['data-bbcode']) {
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delete node[1]['data-bbcode'];
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return;
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}
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// We don't onebox mentions
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if (node[1]['class'] === 'mention') { return; }
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// Don't onebox links within a list
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for (var i=0; i<path.length; i++) {
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if (path[i][0] === 'li') { return; }
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}
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// If the link has a different label text than the link itself, don't onebox it.
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const label = node[node.length-1];
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if (label !== node[1]['href']) { return; }
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if (isOnOneLine(node, parent)) {
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node[1]['class'] = 'onebox';
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node[1].target = '_blank';
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const contents = lookupCache(node[1].href);
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if (contents) {
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node[0] = '__RAW';
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node[1] = contents;
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node.length = 2;
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}
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}
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});
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}
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