json-joy/esm/json-crdt-extensions/peritext/slice/MarkerSlice.js

Collection of libraries for building collaborative editing apps.

import { Anchor } from '../rga/constants';
import { PersistedSlice } from './PersistedSlice';
/**
 * Represents a block split in the text, i.e. it is a *marker* that shows
 * where a block was split. Markers also insert one "\n" new line character.
 * Both marker ends are attached to the "before" anchor fo the "\n" new line
 * character, i.e. it is *collapsed* to the "before" anchor.
 */
export class MarkerSlice extends PersistedSlice {
    /**
     * Returns the {@link Range} which exactly contains the block boundary of this
     * marker.
     */
    boundary() {
        const start = this.start;
        const end = start.clone();
        end.anchor = Anchor.After;
        return this.txt.range(start, end);
    }
    del() {
        super.del();
        const txt = this.txt;
        const range = txt.range(this.start, this.start.copy((p) => (p.anchor = Anchor.After)));
        txt.delStr(range);
    }
}