Function AutoScrollPlugin

modular/sortable.core.esm.js:2421–2523

()

  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);
    },