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import {
toggleClass,
index
} from '../../src/utils.js';
let lastSwapEl;
function SwapPlugin() {
function Swap() {
this.defaults = {
swapClass: 'sortable-swap-highlight'
};
}
Swap.prototype = {
dragStart({ dragEl }) {
lastSwapEl = dragEl;
},
dragOverValid({ completed, target, onMove, activeSortable, changed, cancel }) {
if (!activeSortable.options.swap) return;
let el = this.sortable.el,
options = this.options;
if (target && target !== el) {
let prevSwapEl = lastSwapEl;
if (onMove(target) !== false) {
toggleClass(target, options.swapClass, true);
lastSwapEl = target;
} else {
lastSwapEl = null;
}
if (prevSwapEl && prevSwapEl !== lastSwapEl) {
toggleClass(prevSwapEl, options.swapClass, false);
}
}
changed();
completed(true);
cancel();
},
drop({ activeSortable, putSortable, dragEl }) {
let toSortable = (putSortable || this.sortable);
let options = this.options;
lastSwapEl && toggleClass(lastSwapEl, options.swapClass, false);
if (lastSwapEl && (options.swap || putSortable && putSortable.options.swap)) {
if (dragEl !== lastSwapEl) {
toSortable.captureAnimationState();
if (toSortable !== activeSortable) activeSortable.captureAnimationState();
swapNodes(dragEl, lastSwapEl);
toSortable.animateAll();
if (toSortable !== activeSortable) activeSortable.animateAll();
}
}
},
nulling() {
lastSwapEl = null;
}
};
return Object.assign(Swap, {
pluginName: 'swap',
eventProperties() {
return {
swapItem: lastSwapEl
};
}
});
}
function swapNodes(n1, n2) {
let p1 = n1.parentNode,
p2 = n2.parentNode,
i1, i2;
if (!p1 || !p2 || p1.isEqualNode(n2) || p2.isEqualNode(n1)) return;
i1 = index(n1);
i2 = index(n2);
if (p1.isEqualNode(p2) && i1 < i2) {
i2++;
}
p1.insertBefore(n2, p1.children[i1]);
p2.insertBefore(n1, p2.children[i2]);
}
export default SwapPlugin;
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