chessground12/dist/drop.js

Extended lishuuro.org Chess UI

import { cancel as dragCancel } from './drag';
import { predrop } from './predrop';
import { unselect, isPredroppable, unsetPremove, unsetPredrop, getKeyAtDomPos, whitePov, dropNewPiece, } from './board';
import { dropOrigOf, eventPosition } from './util';
export function setDropMode(s, piece) {
    s.dropmode.active = true;
    s.dropmode.piece = piece;
    dragCancel(s);
    unselect(s);
    if (piece) {
        if (isPredroppable(s)) {
            s.predroppable.dropDests = predrop(s.pieces, piece, s.geometry, s.variant);
        }
        else {
            if (s.movable.dests) {
                const dropDests = new Map([[piece.role, s.movable.dests.get(dropOrigOf(piece.role))]]);
                s.dropmode.active = true;
                s.dropmode.dropDests = dropDests;
            }
        }
    }
}
export function cancelDropMode(s) {
    s.dropmode.active = false;
}
export function drop(s, e) {
    if (!s.dropmode.active)
        return;
    unsetPremove(s);
    unsetPredrop(s);
    const piece = s.dropmode.piece;
    if (piece) {
        s.pieces.set('a0', piece);
        const position = eventPosition(e);
        const dest = position && getKeyAtDomPos(position, whitePov(s), s.dom.bounds(), s.geometry);
        if (dest)
            dropNewPiece(s, 'a0', dest);
    }
    s.dom.redraw();
}
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