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Sortable.js
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/**!
* Sortable
* @author RubaXa <[email protected]>
* @author owenm <[email protected]>
* @license MIT
*/
(function sortableModule(factory) {
"use strict";
if (typeof define === "function" && define.amd) {
define(factory);
}
else if (typeof module != "undefined" && typeof module.exports != "undefined") {
module.exports = factory();
}
else {
/* jshint sub:true */
window["Sortable"] = factory();
}
})(function sortableFactory() {
"use strict";
if (typeof window === "undefined" || !window.document) {
return function sortableError() {
throw new Error("Sortable.js requires a window with a document");
};
}
var dragEl,
parentEl,
ghostEl,
cloneEl,
rootEl,
nextEl,
lastDownEl,
scrollEl,
scrollParentEl,
scrollCustomFn,
oldIndex,
newIndex,
activeGroup,
putSortable,
autoScrolls = [],
scrolling = false,
pointerElemChangedInterval,
lastPointerElemX,
lastPointerElemY,
tapEvt,
touchEvt,
moved,
lastTarget,
lastDirection,
pastFirstInvertThresh = false,
isCircumstantialInvert = false,
forRepaintDummy,
realDragElRect, // dragEl rect after current animation
/** @const */
R_SPACE = /\s+/g,
expando = 'Sortable' + (new Date).getTime(),
win = window,
document = win.document,
parseInt = win.parseInt,
setTimeout = win.setTimeout,
$ = win.jQuery || win.Zepto,
Polymer = win.Polymer,
captureMode = {
capture: false,
passive: false
},
supportDraggable = ('draggable' in document.createElement('div')),
supportCssPointerEvents = (function (el) {
// false when IE11
if (!!navigator.userAgent.match(/(?:Trident.*rv[ :]?11\.|msie)/i)) {
return false;
}
el = document.createElement('x');
el.style.cssText = 'pointer-events:auto';
return el.style.pointerEvents === 'auto';
})(),
_silent = false,
_alignedSilent = false,
abs = Math.abs,
min = Math.min,
savedInputChecked = [],
touchDragOverListeners = [],
alwaysFalse = function () { return false; },
_detectDirection = function(el, options) {
var elCSS = _css(el),
elWidth = parseInt(elCSS.width),
child1 = _getChild(el, 0, options),
child2 = _getChild(el, 1, options),
firstChildCSS = child1 && _css(child1),
secondChildCSS = child2 && _css(child2),
firstChildWidth = firstChildCSS && parseInt(firstChildCSS.marginLeft) + parseInt(firstChildCSS.marginRight) + child1.getBoundingClientRect().width,
secondChildWidth = secondChildCSS && parseInt(secondChildCSS.marginLeft) + parseInt(secondChildCSS.marginRight) + child2.getBoundingClientRect().width
;
if (elCSS.display === 'flex') {
return elCSS.flexDirection === 'column' || elCSS.flexDirection === 'column-reverse'
? 'vertical' : 'horizontal';
}
return (child1 &&
(
firstChildCSS.display === 'block' ||
firstChildCSS.display === 'grid' ||
firstChildWidth >= elWidth &&
elCSS.float === 'none' ||
child2 &&
elCSS.float === 'none' &&
firstChildWidth + secondChildWidth > elWidth
) ?
'vertical' : 'horizontal'
);
},
_isInRowColumn = function(x, y, el, axis, options) {
var targetRect = realDragElRect || dragEl.getBoundingClientRect(),
targetS1Opp = axis === 'vertical' ? targetRect.left : targetRect.top,
targetS2Opp = axis === 'vertical' ? targetRect.right : targetRect.bottom,
mouseOnOppAxis = axis === 'vertical' ? x : y
;
return targetS1Opp < mouseOnOppAxis && mouseOnOppAxis < targetS2Opp;
},
_getParentAutoScrollElement = function(el, includeSelf) {
// skip to window
if (!el || !el.getBoundingClientRect) return win;
var elem = el;
var gotSelf = false;
do {
// we don't need to get elem css if it isn't even overflowing in the first place (performance)
if (elem.clientWidth < elem.scrollWidth || elem.clientHeight < elem.scrollHeight) {
var elemCSS = _css(elem);
if (
elem.clientWidth < elem.scrollWidth && (elemCSS.overflowX == 'auto' || elemCSS.overflowX == 'scroll') ||
elem.clientHeight < elem.scrollHeight && (elemCSS.overflowY == 'auto' || elemCSS.overflowY == 'scroll')
) {
if (!elem || !elem.getBoundingClientRect || elem === document.body) return win;
if (gotSelf || includeSelf) return elem;
gotSelf = true;
}
}
/* jshint boss:true */
} while (elem = elem.parentNode);
return win;
},
_autoScroll = _throttle(function (/**Event*/evt, /**Object*/options, /**HTMLElement*/rootEl, /**Boolean*/isFallback) {
// Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=505521
if (options.scroll) {
var _this = rootEl ? rootEl[expando] : window,
rect,
css,
sens = options.scrollSensitivity,
speed = options.scrollSpeed,
x = evt.clientX,
y = evt.clientY,
winWidth = window.innerWidth,
winHeight = window.innerHeight,
vx,
vy,
scrollThisInstance = false
;
// Detect scrollEl
if (scrollParentEl !== rootEl) {
_clearAutoScrolls();
scrollEl = options.scroll;
scrollCustomFn = options.scrollFn;
if (scrollEl === true) {
scrollEl = _getParentAutoScrollElement(rootEl, true);
scrollParentEl = scrollEl;
}
}
var layersOut = 0;
var currentParent = scrollEl;
do {
var el;
if (currentParent && currentParent !== win) {
el = currentParent;
css = _css(el);
rect = currentParent.getBoundingClientRect();
vx = el.clientWidth < el.scrollWidth && (css.overflowX == 'auto' || css.overflowX == 'scroll') &&
((abs(rect.right - x) <= sens) - (abs(rect.left - x) <= sens));
vy = el.clientHeight < el.scrollHeight && (css.overflowY == 'auto' || css.overflowY == 'scroll') &&
((abs(rect.bottom - y) <= sens) - (abs(rect.top - y) <= sens));
} else if (currentParent === win) {
el = win;
vx = (winWidth - x <= sens) - (x <= sens);
vy = (winHeight - y <= sens) - (y <= sens);
}
if (!autoScrolls[layersOut]) {
for (var i = 0; i <= layersOut; i++) {
if (!autoScrolls[i]) {
autoScrolls[i] = {};
}
}
}
if (autoScrolls[layersOut].vx != vx || autoScrolls[layersOut].vy != vy || autoScrolls[layersOut].el !== el) {
autoScrolls[layersOut].el = el;
autoScrolls[layersOut].vx = vx;
autoScrolls[layersOut].vy = vy;
clearInterval(autoScrolls[layersOut].pid);
if (el && (vx != 0 || vy != 0)) {
scrollThisInstance = true;
/* jshint loopfunc:true */
autoScrolls[layersOut].pid = setInterval((function () {
// emulate drag over during autoscroll (fallback), emulating native DnD behaviour
if (isFallback && this.layer === 0) {
Sortable.active._emulateDragOver(true);
}
var scrollOffsetY = autoScrolls[this.layer].vy ? autoScrolls[this.layer].vy * speed : 0;
var scrollOffsetX = autoScrolls[this.layer].vx ? autoScrolls[this.layer].vx * speed : 0;
if ('function' === typeof(scrollCustomFn)) {
if (scrollCustomFn.call(_this, scrollOffsetX, scrollOffsetY, evt, touchEvt, autoScrolls[this.layer].el) !== 'continue') {
return;
}
}
if (autoScrolls[this.layer].el === win) {
win.scrollTo(win.pageXOffset + scrollOffsetX, win.pageYOffset + scrollOffsetY);
} else {
autoScrolls[this.layer].el.scrollTop += scrollOffsetY;
autoScrolls[this.layer].el.scrollLeft += scrollOffsetX;
}
}).bind({layer: layersOut}), 24);
}
}
layersOut++;
} while (options.bubbleScroll && currentParent !== win && (currentParent = _getParentAutoScrollElement(currentParent, false)));
scrolling = scrollThisInstance; // in case another function catches scrolling as false in between when it is not
}
}, 30),
_clearAutoScrolls = function () {
autoScrolls.forEach(function(autoScroll) {
clearInterval(autoScroll.pid);
});
autoScrolls = [];
},
_prepareGroup = function (options) {
function toFn(value, pull) {
return function(to, from, dragEl, evt) {
var ret;
if (value == null && pull) {
ret = true; // default pull value: true (backwards compatibility)
} else if (value == null || value === false) {
ret = false;
} else if (pull && value === 'clone') {
ret = value;
} else if (typeof value === 'function') {
ret = value(to, from, dragEl, evt);
} else {
var otherGroup = (pull ? to : from).options.group.name;
ret = (value === true ||
(typeof value === 'string' && value === otherGroup) ||
(value.join && value.indexOf(otherGroup) > -1));
}
return ret || (to.options.group.name && from.options.group.name && to.options.group.name === from.options.group.name);
};
}
var group = {};
var originalGroup = options.group;
if (!originalGroup || typeof originalGroup != 'object') {
originalGroup = {name: originalGroup};
}
group.name = originalGroup.name;
group.checkPull = toFn(originalGroup.pull, true);
group.checkPut = toFn(originalGroup.put);
group.revertClone = originalGroup.revertClone;
options.group = group;
},
_checkAlignment = function(evt) {
if (!dragEl) return;
dragEl.parentNode[expando] && dragEl.parentNode[expando]._computeIsAligned(evt);
}
;
/**
* @class Sortable
* @param {HTMLElement} el
* @param {Object} [options]
*/
function Sortable(el, options) {
if (!(el && el.nodeType && el.nodeType === 1)) {
throw 'Sortable: `el` must be HTMLElement, and not ' + {}.toString.call(el);
}
this.el = el; // root element
this.options = options = _extend({}, options);
// Export instance
el[expando] = this;
// Default options
var defaults = {
group: null,
sort: true,
disabled: false,
store: null,
handle: null,
scroll: true,
scrollSensitivity: 30,
scrollSpeed: 10,
bubbleScroll: true,
draggable: /[uo]l/i.test(el.nodeName) ? 'li' : '>*',
swapThreshold: 1, // percentage; 0 <= x <= 1
invertSwap: false, // invert always
invertedSwapThreshold: null, // will be set to same as swapThreshold if default
ghostClass: 'sortable-ghost',
chosenClass: 'sortable-chosen',
dragClass: 'sortable-drag',
ignore: 'a, img',
filter: null,
preventOnFilter: true,
animation: 0,
setData: function (dataTransfer, dragEl) {
dataTransfer.setData('Text', dragEl.textContent);
},
dropBubble: false,
dragoverBubble: false,
dataIdAttr: 'data-id',
delay: 0,
touchStartThreshold: parseInt(window.devicePixelRatio, 10) || 1,
forceFallback: false,
fallbackClass: 'sortable-fallback',
fallbackOnBody: false,
fallbackTolerance: 0,
fallbackOffset: {x: 0, y: 0},
supportPointer: Sortable.supportPointer !== false && (
('PointerEvent' in window) ||
window.navigator && ('msPointerEnabled' in window.navigator) // microsoft
)
};
// Set default options
for (var name in defaults) {
!(name in options) && (options[name] = defaults[name]);
}
if (!('direction' in options)) {
options.direction = function() {
return _detectDirection(el, options);
};
}
_prepareGroup(options);
options.invertedSwapThreshold == null && (options.invertedSwapThreshold = options.swapThreshold);
// Bind all private methods
for (var fn in this) {
if (fn.charAt(0) === '_' && typeof this[fn] === 'function') {
this[fn] = this[fn].bind(this);
}
}
// Setup drag mode
this.nativeDraggable = options.forceFallback ? false : supportDraggable;
// Bind events
_on(el, 'mousedown', this._onTapStart);
_on(el, 'touchstart', this._onTapStart);
options.supportPointer && _on(el, 'pointerdown', this._onTapStart);
if (this.nativeDraggable) {
_on(el, 'dragover', this);
_on(el, 'dragenter', this);
}
touchDragOverListeners.push(this._onDragOver);
// Restore sorting
options.store && options.store.get && this.sort(options.store.get(this) || []);
}
Sortable.prototype = /** @lends Sortable.prototype */ {
constructor: Sortable,
// is mouse aligned with dragEl?
_isAligned: true,
_computeIsAligned: function(evt, isDragEl) {
if (_alignedSilent) return;
if (!dragEl || dragEl.parentNode !== this.el) return;
if (isDragEl !== true && isDragEl !== false) {
isDragEl = !!_closest(evt.target, null, dragEl, true);
}
this._isAligned = !scrolling && (isDragEl || this._isAligned && _isInRowColumn(evt.clientX, evt.clientY, this.el, this._getDirection(evt, null), this.options));
_alignedSilent = true;
setTimeout(function() {
_alignedSilent = false;
}, 30);
},
_getDirection: function(evt, target) {
return (typeof this.options.direction === 'function') ? this.options.direction.call(this, evt, target, dragEl) : this.options.direction;
},
_onTapStart: function (/** Event|TouchEvent */evt) {
var _this = this,
el = this.el,
options = this.options,
preventOnFilter = options.preventOnFilter,
type = evt.type,
touch = evt.touches && evt.touches[0],
target = (touch || evt).target,
originalTarget = evt.target.shadowRoot && ((evt.path && evt.path[0]) || (evt.composedPath && evt.composedPath()[0])) || target,
filter = options.filter,
startIndex;
_saveInputCheckedState(el);
// Don't trigger start event when an element is been dragged, otherwise the evt.oldindex always wrong when set option.group.
if (dragEl) {
return;
}
if (/mousedown|pointerdown/.test(type) && evt.button !== 0 || options.disabled) {
return; // only left button or enabled
}
// cancel dnd if original target is content editable
if (originalTarget.isContentEditable) {
return;
}
target = _closest(target, options.draggable, el, true);
if (!target) {
return;
}
if (lastDownEl === target) {
// Ignoring duplicate `down`
return;
}
// Get the index of the dragged element within its parent
startIndex = _index(target, options.draggable);
// Check filter
if (typeof filter === 'function') {
if (filter.call(this, evt, target, this)) {
_dispatchEvent(_this, originalTarget, 'filter', target, el, el, startIndex);
preventOnFilter && evt.cancelable && evt.preventDefault();
return; // cancel dnd
}
}
else if (filter) {
filter = filter.split(',').some(function (criteria) {
criteria = _closest(originalTarget, criteria.trim(), el, false);
if (criteria) {
_dispatchEvent(_this, criteria, 'filter', target, el, el, startIndex);
return true;
}
});
if (filter) {
preventOnFilter && evt.cancelable && evt.preventDefault();
return; // cancel dnd
}
}
if (options.handle && !_closest(originalTarget, options.handle, el, false)) {
return;
}
// Prepare `dragstart`
this._prepareDragStart(evt, touch, target, startIndex);
},
_handleAutoScroll: function(evt, fallback) {
if (!dragEl || !this.options.scroll) return;
var x = evt.clientX,
y = evt.clientY,
elem = document.elementFromPoint(x, y),
_this = this
;
// firefox does not have native autoscroll
if (fallback || (window.navigator && window.navigator.userAgent.toLowerCase().indexOf('firefox') > -1)) {
_autoScroll(evt, _this.options, elem, true);
// Listener for pointer element change
var ogElemScroller = _getParentAutoScrollElement(elem, true);
if (
scrolling &&
(
!pointerElemChangedInterval ||
x !== lastPointerElemX ||
y !== lastPointerElemY
)
) {
pointerElemChangedInterval && clearInterval(pointerElemChangedInterval);
// Detect for pointer elem change, emulating native DnD behaviour
pointerElemChangedInterval = setInterval(function() {
if (!dragEl) return;
// could also check if scroll direction on newElem changes due to parent autoscrolling
var newElem = _getParentAutoScrollElement(document.elementFromPoint(x, y), true);
if (newElem !== ogElemScroller) {
ogElemScroller = newElem;
_clearAutoScrolls();
_autoScroll(evt, _this.options, ogElemScroller, true);
}
}, 10);
lastPointerElemX = x;
lastPointerElemY = y;
}
} else {
// if DnD is enabled (not on firefox), first autoscroll will already scroll, so get parent autoscroll of first autoscroll
if (!_this.options.bubbleScroll || _getParentAutoScrollElement(elem, true) === window) {
_clearAutoScrolls();
return;
}
_autoScroll(evt, _this.options, _getParentAutoScrollElement(elem, false));
}
},
_prepareDragStart: function (/** Event */evt, /** Touch */touch, /** HTMLElement */target, /** Number */startIndex) {
var _this = this,
el = _this.el,
options = _this.options,
ownerDocument = el.ownerDocument,
dragStartFn;
if (target && !dragEl && (target.parentNode === el)) {
tapEvt = evt;
rootEl = el;
dragEl = target;
parentEl = dragEl.parentNode;
nextEl = dragEl.nextSibling;
lastDownEl = target;
activeGroup = options.group;
oldIndex = startIndex;
this._lastX = (touch || evt).clientX;
this._lastY = (touch || evt).clientY;
dragEl.style['will-change'] = 'all';
dragStartFn = function () {
// Delayed drag has been triggered
// we can re-enable the events: touchmove/mousemove
_this._disableDelayedDrag();
// Make the element draggable
dragEl.draggable = _this.nativeDraggable;
// Bind the events: dragstart/dragend
_this._triggerDragStart(evt, touch);
// Drag start event
_dispatchEvent(_this, rootEl, 'choose', dragEl, rootEl, rootEl, oldIndex);
// Chosen item
_toggleClass(dragEl, options.chosenClass, true);
};
// Disable "draggable"
options.ignore.split(',').forEach(function (criteria) {
_find(dragEl, criteria.trim(), _disableDraggable);
});
_on(ownerDocument, 'mouseup', _this._onDrop);
_on(ownerDocument, 'touchend', _this._onDrop);
_on(ownerDocument, 'touchcancel', _this._onDrop);
options.supportPointer && _on(ownerDocument, 'pointercancel', _this._onDrop);
if (options.delay) {
// If the user moves the pointer or let go the click or touch
// before the delay has been reached:
// disable the delayed drag
_on(ownerDocument, 'mouseup', _this._disableDelayedDrag);
_on(ownerDocument, 'touchend', _this._disableDelayedDrag);
_on(ownerDocument, 'touchcancel', _this._disableDelayedDrag);
_on(ownerDocument, 'mousemove', _this._delayedDragTouchMoveHandler);
_on(ownerDocument, 'touchmove', _this._delayedDragTouchMoveHandler);
options.supportPointer && _on(ownerDocument, 'pointermove', _this._delayedDragTouchMoveHandler);
_this._dragStartTimer = setTimeout(dragStartFn.bind(_this), options.delay);
} else {
dragStartFn();
}
}
},
_delayedDragTouchMoveHandler: function (/** TouchEvent|PointerEvent **/e) {
var touch = e.touches ? e.touches[0] : e;
if (min(abs(touch.clientX - this._lastX), abs(touch.clientY - this._lastY))
>= this.options.touchStartThreshold
) {
this._disableDelayedDrag();
}
},
_disableDelayedDrag: function () {
var ownerDocument = this.el.ownerDocument;
clearTimeout(this._dragStartTimer);
_off(ownerDocument, 'mouseup', this._disableDelayedDrag);
_off(ownerDocument, 'touchend', this._disableDelayedDrag);
_off(ownerDocument, 'touchcancel', this._disableDelayedDrag);
_off(ownerDocument, 'mousemove', this._delayedDragTouchMoveHandler);
_off(ownerDocument, 'touchmove', this._delayedDragTouchMoveHandler);
_off(ownerDocument, 'pointermove', this._delayedDragTouchMoveHandler);
},
_triggerDragStart: function (/** Event */evt, /** Touch */touch) {
touch = touch || (evt.pointerType == 'touch' ? evt : null);
if (touch) {
// Touch device support
tapEvt = {
target: dragEl,
clientX: touch.clientX,
clientY: touch.clientY
};
this._onDragStart(tapEvt, 'touch');
}
else if (!this.nativeDraggable) {
this._onDragStart(tapEvt, true);
}
else {
_on(dragEl, 'dragend', this);
_on(rootEl, 'dragstart', this._onDragStart);
}
try {
if (document.selection) {
// Timeout neccessary for IE9
_nextTick(function () {
document.selection.empty();
});
} else {
window.getSelection().removeAllRanges();
}
} catch (err) {
}
},
_dragStarted: function () {
if (rootEl && dragEl) {
if (this.nativeDraggable) {
_on(document, 'dragover', this._handleAutoScroll);
_on(document, 'dragover', _checkAlignment);
}
var options = this.options;
// Apply effect
_toggleClass(dragEl, options.dragClass, false);
_toggleClass(dragEl, options.ghostClass, true);
_css(dragEl, 'transform', '');
Sortable.active = this;
this._isAligned = true;
// Drag start event
_dispatchEvent(this, rootEl, 'start', dragEl, rootEl, rootEl, oldIndex);
} else {
this._nulling();
}
},
_emulateDragOver: function (bypassLastTouchCheck) {
if (touchEvt) {
if (this._lastX === touchEvt.clientX && this._lastY === touchEvt.clientY && !bypassLastTouchCheck) {
return;
}
this._lastX = touchEvt.clientX;
this._lastY = touchEvt.clientY;
if (!supportCssPointerEvents) {
_css(ghostEl, 'display', 'none');
}
var target = document.elementFromPoint(touchEvt.clientX, touchEvt.clientY);
var parent = target;
var isDragEl = !!_closest(target, null, dragEl, true);
while (target && target.shadowRoot) {
target = target.shadowRoot.elementFromPoint(touchEvt.clientX, touchEvt.clientY);
parent = target;
}
if (parent) {
do {
if (parent[expando]) {
var i = touchDragOverListeners.length;
while (i--) {
touchDragOverListeners[i]({
clientX: touchEvt.clientX,
clientY: touchEvt.clientY,
target: target,
rootEl: parent
});
}
if (!this.options.dragoverBubble) {
break;
}
}
target = parent; // store last element
}
/* jshint boss:true */
while (parent = parent.parentNode);
}
dragEl.parentNode[expando]._computeIsAligned(touchEvt, isDragEl);
if (!supportCssPointerEvents) {
_css(ghostEl, 'display', '');
}
}
},
_onTouchMove: function (/**TouchEvent*/evt) {
if (tapEvt) {
var options = this.options,
fallbackTolerance = options.fallbackTolerance,
fallbackOffset = options.fallbackOffset,
touch = evt.touches ? evt.touches[0] : evt,
dx = (touch.clientX - tapEvt.clientX) + fallbackOffset.x,
dy = (touch.clientY - tapEvt.clientY) + fallbackOffset.y,
translate3d = evt.touches ? 'translate3d(' + dx + 'px,' + dy + 'px,0)' : 'translate(' + dx + 'px,' + dy + 'px)';
// prevent duplicate event firing
if (this.options.supportPointer && evt.type === 'touchmove') return;
// only set the status to dragging, when we are actually dragging
if (!Sortable.active) {
if (fallbackTolerance &&
min(abs(touch.clientX - this._lastX), abs(touch.clientY - this._lastY)) < fallbackTolerance
) {
return;
}
this._dragStarted();
}
// as well as creating the ghost element on the document body
this._appendGhost();
this._handleAutoScroll(touch, true);
moved = true;
touchEvt = touch;
_css(ghostEl, 'webkitTransform', translate3d);
_css(ghostEl, 'mozTransform', translate3d);
_css(ghostEl, 'msTransform', translate3d);
_css(ghostEl, 'transform', translate3d);
evt.cancelable && evt.preventDefault();
}
},
_appendGhost: function () {
if (!ghostEl) {
var rect = dragEl.getBoundingClientRect(),
css = _css(dragEl),
options = this.options;
ghostEl = dragEl.cloneNode(true);
_toggleClass(ghostEl, options.ghostClass, false);
_toggleClass(ghostEl, options.fallbackClass, true);
_toggleClass(ghostEl, options.dragClass, true);
_css(ghostEl, 'box-sizing', 'border-box');
_css(ghostEl, 'margin', 0);
_css(ghostEl, 'top', rect.top);
_css(ghostEl, 'left', rect.left);
_css(ghostEl, 'width', rect.width);
_css(ghostEl, 'height', rect.height);
_css(ghostEl, 'opacity', '0.8');
_css(ghostEl, 'position', 'fixed');
_css(ghostEl, 'zIndex', '100000');
_css(ghostEl, 'pointerEvents', 'none');
options.fallbackOnBody && document.body.appendChild(ghostEl) || rootEl.appendChild(ghostEl);
}
},
_onDragStart: function (/**Event*/evt, /**boolean*/useFallback) {
var _this = this;
var dataTransfer = evt.dataTransfer;
var options = _this.options;
_this._offUpEvents();
if (activeGroup.checkPull(_this, _this, dragEl, evt)) {
cloneEl = _clone(dragEl);
cloneEl.draggable = false;
cloneEl.style['will-change'] = '';
this._hideClone();
_toggleClass(cloneEl, _this.options.chosenClass, false);
// #1143: IFrame support workaround
_this._cloneId = _nextTick(function () {
rootEl.insertBefore(cloneEl, dragEl);
_dispatchEvent(_this, rootEl, 'clone', dragEl);
});
}
_toggleClass(dragEl, options.dragClass, true);
if (useFallback) {
if (useFallback === 'touch') {
// Fixed #973:
_on(document, 'touchmove', _preventScroll);
// Bind touch events
_on(document, 'touchmove', _this._onTouchMove);
_on(document, 'touchend', _this._onDrop);
_on(document, 'touchcancel', _this._onDrop);
if (options.supportPointer) {
_on(document, 'pointermove', _this._onTouchMove);
_on(document, 'pointerup', _this._onDrop);
}
} else {
// Old brwoser
_on(document, 'mousemove', _this._onTouchMove);
_on(document, 'mouseup', _this._onDrop);
}
_this._loopId = setInterval(_this._emulateDragOver, 50);
_toggleClass(dragEl, options.dragClass, false);
}
else {
if (dataTransfer) {
dataTransfer.effectAllowed = 'move';
options.setData && options.setData.call(_this, dataTransfer, dragEl);
}
_on(document, 'drop', _this);
// #1276 fix:
_css(dragEl, 'transform', 'translateZ(0)');
_this._dragStartId = _nextTick(_this._dragStarted);
}
_on(document, 'selectstart', _this);
},
_onDragOver: function (/**Event*/evt) {
var el = this.el,
target,
dragRect,
targetRect,
revert,
options = this.options,
group = options.group,
activeSortable = Sortable.active,
isOwner = (activeGroup === group),
isMovingBetweenSortable = false,
canSort = options.sort
;
if (evt.rootEl !== void 0 && evt.rootEl !== this.el) return; // touch fallback
// no bubbling and not fallback
if (!options.dragoverBubble && !evt.rootEl) {
this._handleAutoScroll(evt);
dragEl.parentNode[expando]._computeIsAligned(evt);
}
if (evt.preventDefault !== void 0) {
evt.cancelable && evt.preventDefault();
!options.dragoverBubble && evt.stopPropagation();
}
moved = true;
target = _closest(evt.target, options.draggable, el, true);
if (dragEl.animated && target === dragEl || target.animated || _silent) {
return;
}
if (target !== lastTarget) {
isCircumstantialInvert = false;
pastFirstInvertThresh = false;
lastTarget = null;
}
if (activeSortable && !options.disabled &&
(isOwner
? canSort || (revert = !rootEl.contains(dragEl)) // Reverting item into the original list
: (
putSortable === this ||
(
(this.lastPutMode = activeGroup.checkPull(this, activeSortable, dragEl, evt)) &&
group.checkPut(this, activeSortable, dragEl, evt)
)
)
)
) {
var direction;
var axis = this._getDirection(evt, target);
dragRect = dragEl.getBoundingClientRect();
if (putSortable !== this && this !== Sortable.active) {
putSortable = this;
isMovingBetweenSortable = true;
} else if (this === Sortable.active) {
isMovingBetweenSortable = false;
putSortable = null;
}
if (revert) {
this._hideClone();
parentEl = rootEl; // actualization
if (cloneEl || nextEl) {
rootEl.insertBefore(dragEl, cloneEl || nextEl);
}
else if (!canSort) {
rootEl.appendChild(dragEl);
}
return;
}