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silverbullet/web/cm_plugins/wiki_link.ts

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TypeScript
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import { pageLinkRegex } from "../../common/parser.ts";
import { ClickEvent } from "../../plug-api/app_event.ts";
import {
Decoration,
DecorationSet,
EditorView,
ViewPlugin,
ViewUpdate,
WidgetType,
} from "../deps.ts";
import { Editor } from "../editor.tsx";
import {
invisibleDecoration,
isCursorInRange,
iterateTreeInVisibleRanges,
LinkWidget,
} from "./util.ts";
/**
* Plugin to hide path prefix when the cursor is not inside.
*/
export function cleanWikiLinkPlugin(editor: Editor) {
return ViewPlugin.fromClass(
class {
decorations: DecorationSet;
constructor(view: EditorView) {
this.decorations = this.compute(view);
}
update(update: ViewUpdate) {
if (
update.docChanged || update.viewportChanged || update.selectionSet
) {
this.decorations = this.compute(update.view);
}
}
compute(view: EditorView): DecorationSet {
const widgets: any[] = [];
// let parentRange: [number, number];
iterateTreeInVisibleRanges(view, {
enter: ({ type, from, to }) => {
if (type.name !== "WikiLink") {
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return;
}
// Adding 2 on each side due to [[ and ]] that are outside the WikiLinkPage node
if (isCursorInRange(view.state, [from, to])) {
return;
}
const text = view.state.sliceDoc(from, to);
const match = pageLinkRegex.exec(text);
if (!match) return;
const [_fullMatch, page, pipePart, alias] = match;
// Hide the whole thing
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widgets.push(
invisibleDecoration.range(
from,
to,
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),
);
let linkText = alias || page;
if (!pipePart && text.indexOf("/") !== -1) {
// Let's use the last part of the path as the link text
linkText = page.split("/").pop()!;
}
// And replace it with a widget
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widgets.push(
Decoration.widget({
widget: new LinkWidget(
linkText,
page,
"sb-wiki-link-page",
(e) => {
if (e.altKey) {
// Move cursor into the link
return view.dispatch({
selection: { anchor: from + 2 },
});
}
// Dispatch click event to navigate there without moving the cursor
const clickEvent: ClickEvent = {
page: editor.currentPage!,
ctrlKey: e.ctrlKey,
metaKey: e.metaKey,
altKey: e.altKey,
pos: from,
};
editor.dispatchAppEvent("page:click", clickEvent).catch(
console.error,
);
},
),
}).range(from),
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);
},
});
return Decoration.set(widgets, true);
}
},
{
decorations: (v) => v.decorations,
},
);
}