Function AutoScrollPlugin

Sortable.js:2427–2529

()

    touchEvt$1,
    pointerElemChangedInterval;
  function AutoScrollPlugin() {
    function AutoScroll() {
      this.defaults = {
        scroll: true,
        forceAutoScrollFallback: false,
        scrollSensitivity: 30,
        scrollSpeed: 10,
        bubbleScroll: true
      };

      // Bind all private methods
      for (var fn in this) {
        if (fn.charAt(0) === '_' && typeof this[fn] === 'function') {
          this[fn] = this[fn].bind(this);
        }
      }
    }
    AutoScroll.prototype = {
      dragStarted: function dragStarted(_ref) {
        var originalEvent = _ref.originalEvent;
        if (this.sortable.nativeDraggable) {
          on(document, 'dragover', this._handleAutoScroll);
        } else {
          if (this.options.supportPointer) {
            on(document, 'pointermove', this._handleFallbackAutoScroll);
          } else if (originalEvent.touches) {
            on(document, 'touchmove', this._handleFallbackAutoScroll);
          } else {
            on(document, 'mousemove', this._handleFallbackAutoScroll);
          }
        }
      },
      dragOverCompleted: function dragOverCompleted(_ref2) {
        var originalEvent = _ref2.originalEvent;
        // For when bubbling is canceled and using fallback (fallback 'touchmove' always reached)
        if (!this.options.dragOverBubble && !originalEvent.rootEl) {
          this._handleAutoScroll(originalEvent);
        }
      },
      drop: function drop() {
        if (this.sortable.nativeDraggable) {
          off(document, 'dragover', this._handleAutoScroll);
        } else {
          off(document, 'pointermove', this._handleFallbackAutoScroll);
          off(document, 'touchmove', this._handleFallbackAutoScroll);
          off(document, 'mousemove', this._handleFallbackAutoScroll);
        }
        clearPointerElemChangedInterval();
        clearAutoScrolls();
        cancelThrottle();
      },
      nulling: function nulling() {
        touchEvt$1 = scrollRootEl = scrollEl = scrolling = pointerElemChangedInterval = lastAutoScrollX = lastAutoScrollY = null;
        autoScrolls.length = 0;
      },
      _handleFallbackAutoScroll: function _handleFallbackAutoScroll(evt) {
        this._handleAutoScroll(evt, true);
      },