97 lines
3.0 KiB
TypeScript
97 lines
3.0 KiB
TypeScript
import { ClickEvent } from "../../plug-api/app_event.ts";
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import {
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Decoration,
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DecorationSet,
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EditorView,
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ViewPlugin,
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ViewUpdate,
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} from "../deps.ts";
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import { Editor } from "../editor.tsx";
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import {
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invisibleDecoration,
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isCursorInRange,
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iterateTreeInVisibleRanges,
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} from "./util.ts";
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import { LinkWidget } from "./util.ts";
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export function linkPlugin(editor: Editor) {
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return ViewPlugin.fromClass(
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class {
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decorations: DecorationSet = Decoration.none;
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constructor(readonly view: EditorView) {
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this.decorations = this.calculateDecorations();
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}
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calculateDecorations() {
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const widgets: any[] = [];
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const view = this.view;
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iterateTreeInVisibleRanges(this.view, {
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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(view.state, [from, to])) {
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return;
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}
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// Hide the whole thing
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widgets.push(
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invisibleDecoration.range(
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from,
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to,
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),
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);
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const text = view.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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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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widgets.push(
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Decoration.widget({
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widget: new LinkWidget(
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cleanAnchor,
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`Click to visit ${cleanLink}`,
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"sb-link",
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(e) => {
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if (e.altKey) {
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// Move cursor into the link, approximate location
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return view.dispatch({
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selection: { anchor: from + 1 },
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});
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}
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// Dispatch click event to navigate there without moving the cursor
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const clickEvent: ClickEvent = {
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page: editor.currentPage!,
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ctrlKey: e.ctrlKey,
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metaKey: e.metaKey,
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altKey: e.altKey,
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pos: from,
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};
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editor.dispatchAppEvent("page:click", clickEvent).catch(
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console.error,
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);
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},
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),
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}).range(from),
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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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update(update: ViewUpdate) {
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if (
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update.docChanged ||
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update.viewportChanged ||
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update.selectionSet
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) {
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this.decorations = this.calculateDecorations();
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}
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}
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},
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{ decorations: (v) => v.decorations },
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);
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}
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