54 lines
1.7 KiB
TypeScript
54 lines
1.7 KiB
TypeScript
import { Decoration, EditorState, foldedRanges, syntaxTree } from "../deps.ts";
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import { decoratorStateField, HtmlWidget, isCursorInRange } from "./util.ts";
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export function frontmatterPlugin() {
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return decoratorStateField(
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(state: EditorState) => {
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const widgets: any[] = [];
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const foldRanges = foldedRanges(state);
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syntaxTree(state).iterate({
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enter(node) {
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if (
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node.name === "FrontMatterMarker"
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) {
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const parent = node.node.parent!;
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const folded = foldRanges.iter();
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let shouldShowFrontmatterBanner = false;
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while (folded.value) {
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// Check if cursor is in the folded range
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if (isCursorInRange(state, [folded.from, folded.to])) {
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// console.log("Cursor is in folded area, ");
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shouldShowFrontmatterBanner = true;
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break;
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}
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folded.next();
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}
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if (!isCursorInRange(state, [parent.from, parent.to])) {
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widgets.push(
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Decoration.line({
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class: "sb-line-frontmatter-outside",
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}).range(node.from),
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);
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shouldShowFrontmatterBanner = true;
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}
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if (shouldShowFrontmatterBanner && parent.from === node.from) {
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// Only put this on the first line of the frontmatter
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widgets.push(
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Decoration.widget({
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widget: new HtmlWidget(
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`frontmatter`,
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"sb-frontmatter-marker",
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),
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}).range(node.from),
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);
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}
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}
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},
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});
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return Decoration.set(widgets, true);
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},
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);
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}
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