54 lines
1.5 KiB
JavaScript
54 lines
1.5 KiB
JavaScript
export function setup(helper) {
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if (helper.getOptions().previewing) {
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return;
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}
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helper.registerPlugin((md) => {
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md.core.ruler.push("anchor", (state) => {
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for (
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let idx = 0, lvl = 0, headingId = 0;
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idx < state.tokens.length;
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idx++
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) {
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if (
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state.tokens[idx].type === "blockquote_open" ||
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(state.tokens[idx].type === "bbcode_open" &&
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state.tokens[idx].tag === "aside")
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) {
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++lvl;
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} else if (
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state.tokens[idx].type === "blockquote_close" ||
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(state.tokens[idx].type === "bbcode_close" &&
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state.tokens[idx].tag === "aside")
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) {
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--lvl;
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}
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if (lvl > 0 || state.tokens[idx].type !== "heading_open") {
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continue;
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}
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const linkOpen = new state.Token("link_open", "a", 1);
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const linkClose = new state.Token("link_close", "a", -1);
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let slug = state.tokens[idx + 1].content
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.toLowerCase()
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.replace(/\s+/g, "-")
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.replace(/[^\w\-]+/g, "")
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.replace(/\-\-+/g, "-")
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.replace(/^-+/, "")
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.replace(/-+$/, "");
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slug = `${slug || "heading"}-${++headingId}`;
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linkOpen.attrSet("name", slug);
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linkOpen.attrSet("class", "anchor");
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linkOpen.attrSet("href", "#" + slug);
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state.tokens[idx + 1].children.unshift(linkClose);
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state.tokens[idx + 1].children.unshift(linkOpen);
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}
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});
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});
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}
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