68 lines
1.9 KiB
TypeScript
68 lines
1.9 KiB
TypeScript
import { Decoration, syntaxTree } from "../deps.ts";
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import { Editor } from "../editor.tsx";
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import {
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decoratorStateField,
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invisibleDecoration,
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isCursorInRange,
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} from "./util.ts";
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export function linkPlugin(editor: Editor) {
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return decoratorStateField((state) => {
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const widgets: any[] = [];
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syntaxTree(state).iterate({
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enter: ({ type, from, to }) => {
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if (type.name !== "Link") {
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return;
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}
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// Adding 2 on each side due to [[ and ]] that are outside the WikiLinkPage node
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if (isCursorInRange(state, [from, to])) {
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return;
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}
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const text = state.sliceDoc(from, to);
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// Links are of the form [hell](https://example.com)
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const [anchorPart, linkPart] = text.split("]("); // Not pretty
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if (anchorPart.substring(1).trim() === "") {
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// Empty link text, let's not do live preview (because it would make it disappear)
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return;
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}
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if (!linkPart) {
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// Invalid link
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return;
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}
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const cleanAnchor = anchorPart.substring(1); // cut off the initial [
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const cleanLink = linkPart.substring(0, linkPart.length - 1); // cut off the final )
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// Hide the start [
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widgets.push(
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invisibleDecoration.range(
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from,
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from + 1,
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),
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);
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// Wrap the link in a href
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widgets.push(
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Decoration.mark({
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tagName: "a",
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class: "sb-link",
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attributes: {
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href: cleanLink,
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title: `Click to visit ${cleanLink}`,
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},
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}).range(from + 1, from + cleanAnchor.length + 1),
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);
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// Hide the tail end of the link
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widgets.push(
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invisibleDecoration.range(
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from + cleanAnchor.length + 1,
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to,
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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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