/*
This file is part of the Notesnook project (https://notesnook.com/)

Copyright (C) 2023 Streetwriters (Private) Limited

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
import { TextSelection } from "prosemirror-state";
////////////////////////////////////////////////////////////////////////////////
/**
 * Some browsers (cough firefox cough) don't properly handle cursor movement on
 * the edges of a NodeView, so we need to make the desired behavior explicit.
 *
 * @see https://bugzilla.mozilla.org/show_bug.cgi?id=1252108
 */
export function nudgeCursorCmd(dir) {
    return (innerState, dispatch) => {
        const { to, from } = innerState.selection;
        // compute target position
        const emptySelection = to === from;
        const currentPos = dir < 0 ? from : to;
        const increment = emptySelection ? dir : 0;
        const nodeSize = innerState.doc.nodeSize;
        const targetPos = Math.max(0, Math.min(nodeSize, currentPos + increment));
        if (dispatch) {
            dispatch(innerState.tr.setSelection(TextSelection.create(innerState.doc, targetPos)));
        }
        return true;
    };
}
export const nudgeCursorForwardCmd = nudgeCursorCmd(+1);
export const nudgeCursorBackCmd = nudgeCursorCmd(-1);
