61 lines
1.5 KiB
TypeScript
61 lines
1.5 KiB
TypeScript
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import { EditorSelection, StateCommand, Transaction } from "@codemirror/state";
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import { Text } from "@codemirror/text";
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export function insertMarker(marker: string): StateCommand {
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return ({ state, dispatch }) => {
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const changes = state.changeByRange((range) => {
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const isBoldBefore =
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state.sliceDoc(range.from - marker.length, range.from) === marker;
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const isBoldAfter =
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state.sliceDoc(range.to, range.to + marker.length) === marker;
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const changes = [];
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changes.push(
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isBoldBefore
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? {
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from: range.from - marker.length,
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to: range.from,
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insert: Text.of([""]),
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}
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: {
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from: range.from,
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insert: Text.of([marker]),
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}
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);
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changes.push(
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isBoldAfter
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? {
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from: range.to,
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to: range.to + marker.length,
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insert: Text.of([""]),
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}
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: {
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from: range.to,
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insert: Text.of([marker]),
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}
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);
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const extendBefore = isBoldBefore ? -marker.length : marker.length;
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const extendAfter = isBoldAfter ? -marker.length : marker.length;
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return {
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changes,
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range: EditorSelection.range(
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range.from + extendBefore,
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range.to + extendAfter
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),
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};
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});
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dispatch(
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state.update(changes, {
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scrollIntoView: true,
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annotations: Transaction.userEvent.of("input"),
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})
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);
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return true;
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};
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}
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