Function SwapPlugin

Sortable.js:2694–2760

()

  var lastSwapEl;
  function SwapPlugin() {
    function Swap() {
      this.defaults = {
        swapClass: 'sortable-swap-highlight'
      };
    }
    Swap.prototype = {
      dragStart: function dragStart(_ref) {
        var dragEl = _ref.dragEl;
        lastSwapEl = dragEl;
      },
      dragOverValid: function dragOverValid(_ref2) {
        var completed = _ref2.completed,
          target = _ref2.target,
          onMove = _ref2.onMove,
          activeSortable = _ref2.activeSortable,
          changed = _ref2.changed,
          cancel = _ref2.cancel;
        if (!activeSortable.options.swap) return;
        var el = this.sortable.el,
          options = this.options;
        if (target && target !== el) {
          var 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: function drop(_ref3) {
        var activeSortable = _ref3.activeSortable,
          putSortable = _ref3.putSortable,
          dragEl = _ref3.dragEl;
        var toSortable = putSortable || this.sortable;
        var 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: function nulling() {
        lastSwapEl = null;
      }
    };