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Sortable.js
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/**!
* Sortable
* @author RubaXa <[email protected]>
* @author owenm <[email protected]>
* @license MIT
*/
import { version } from '../package.json';
import { IE11OrLess, Edge, FireFox, Safari, IOS, ChromeForAndroid } from './BrowserInfo.js';
import AnimationStateManager from './Animation.js';
import PluginManager from './PluginManager.js';
import dispatchEvent from './EventDispatcher.js';
import {
on,
off,
closest,
toggleClass,
css,
matrix,
find,
getWindowScrollingElement,
getRect,
isScrolledPast,
getChild,
lastChild,
index,
getRelativeScrollOffset,
extend,
throttle,
scrollBy,
clone,
expando
} from './utils.js';
let pluginEvent = function(eventName, sortable, { evt: originalEvent, ...data } = {}) {
PluginManager.pluginEvent.bind(Sortable)(eventName, sortable, {
dragEl,
parentEl,
ghostEl,
rootEl,
nextEl,
lastDownEl,
cloneEl,
cloneHidden,
dragStarted: moved,
putSortable,
activeSortable: Sortable.active,
originalEvent,
oldIndex,
oldDraggableIndex,
newIndex,
newDraggableIndex,
hideGhostForTarget: _hideGhostForTarget,
unhideGhostForTarget: _unhideGhostForTarget,
cloneNowHidden() {
cloneHidden = true;
},
cloneNowShown() {
cloneHidden = false;
},
dispatchSortableEvent(name) {
_dispatchEvent({ sortable, name, originalEvent });
},
...data
});
};
function _dispatchEvent(info) {
dispatchEvent({
putSortable,
cloneEl,
targetEl: dragEl,
rootEl,
oldIndex,
oldDraggableIndex,
newIndex,
newDraggableIndex,
...info
});
}
let dragEl,
parentEl,
ghostEl,
rootEl,
nextEl,
lastDownEl,
cloneEl,
cloneHidden,
oldIndex,
newIndex,
oldDraggableIndex,
newDraggableIndex,
activeGroup,
putSortable,
awaitingDragStarted = false,
ignoreNextClick = false,
sortables = [],
tapEvt,
touchEvt,
lastDx,
lastDy,
tapDistanceLeft,
tapDistanceTop,
moved,
lastTarget,
lastDirection,
pastFirstInvertThresh = false,
isCircumstantialInvert = false,
targetMoveDistance,
// For positioning ghost absolutely
ghostRelativeParent,
ghostRelativeParentInitialScroll = [], // (left, top)
_silent = false,
savedInputChecked = [];
/** @const */
const documentExists = typeof document !== 'undefined',
PositionGhostAbsolutely = IOS,
CSSFloatProperty = Edge || IE11OrLess ? 'cssFloat' : 'float',
// This will not pass for IE9, because IE9 DnD only works on anchors
supportDraggable = documentExists && !ChromeForAndroid && !IOS && ('draggable' in document.createElement('div')),
supportCssPointerEvents = (function() {
if (!documentExists) return;
// false when <= IE11
if (IE11OrLess) {
return false;
}
let el = document.createElement('x');
el.style.cssText = 'pointer-events:auto';
return el.style.pointerEvents === 'auto';
})(),
_detectDirection = function(el, options) {
let elCSS = css(el),
elWidth = parseInt(elCSS.width)
- parseInt(elCSS.paddingLeft)
- parseInt(elCSS.paddingRight)
- parseInt(elCSS.borderLeftWidth)
- parseInt(elCSS.borderRightWidth),
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) + getRect(child1).width,
secondChildWidth = secondChildCSS && parseInt(secondChildCSS.marginLeft) + parseInt(secondChildCSS.marginRight) + getRect(child2).width;
if (elCSS.display === 'flex') {
return elCSS.flexDirection === 'column' || elCSS.flexDirection === 'column-reverse'
? 'vertical' : 'horizontal';
}
if (elCSS.display === 'grid') {
return elCSS.gridTemplateColumns.split(' ').length <= 1 ? 'vertical' : 'horizontal';
}
if (child1 && firstChildCSS.float && firstChildCSS.float !== 'none') {
let touchingSideChild2 = firstChildCSS.float === 'left' ? 'left' : 'right';
return child2 && (secondChildCSS.clear === 'both' || secondChildCSS.clear === touchingSideChild2) ?
'vertical' : 'horizontal';
}
return (child1 &&
(
firstChildCSS.display === 'block' ||
firstChildCSS.display === 'flex' ||
firstChildCSS.display === 'table' ||
firstChildCSS.display === 'grid' ||
firstChildWidth >= elWidth &&
elCSS[CSSFloatProperty] === 'none' ||
child2 &&
elCSS[CSSFloatProperty] === 'none' &&
firstChildWidth + secondChildWidth > elWidth
) ?
'vertical' : 'horizontal'
);
},
_dragElInRowColumn = function(dragRect, targetRect, vertical) {
let dragElS1Opp = vertical ? dragRect.left : dragRect.top,
dragElS2Opp = vertical ? dragRect.right : dragRect.bottom,
dragElOppLength = vertical ? dragRect.width : dragRect.height,
targetS1Opp = vertical ? targetRect.left : targetRect.top,
targetS2Opp = vertical ? targetRect.right : targetRect.bottom,
targetOppLength = vertical ? targetRect.width : targetRect.height;
return (
dragElS1Opp === targetS1Opp ||
dragElS2Opp === targetS2Opp ||
(dragElS1Opp + dragElOppLength / 2) === (targetS1Opp + targetOppLength / 2)
);
},
/**
* Detects first nearest empty sortable to X and Y position using emptyInsertThreshold.
* @param {Number} x X position
* @param {Number} y Y position
* @return {HTMLElement} Element of the first found nearest Sortable
*/
_detectNearestEmptySortable = function(x, y) {
let ret;
sortables.some((sortable) => {
const threshold = sortable[expando].options.emptyInsertThreshold;
if (!threshold || lastChild(sortable)) return;
const rect = getRect(sortable),
insideHorizontally = x >= (rect.left - threshold) && x <= (rect.right + threshold),
insideVertically = y >= (rect.top - threshold) && y <= (rect.bottom + threshold);
if (insideHorizontally && insideVertically) {
return (ret = sortable);
}
});
return ret;
},
_prepareGroup = function (options) {
function toFn(value, pull) {
return function(to, from, dragEl, evt) {
let sameGroup = to.options.group.name &&
from.options.group.name &&
to.options.group.name === from.options.group.name;
if (value == null && (pull || sameGroup)) {
// Default pull value
// Default pull and put value if same group
return true;
} else if (value == null || value === false) {
return false;
} else if (pull && value === 'clone') {
return value;
} else if (typeof value === 'function') {
return toFn(value(to, from, dragEl, evt), pull)(to, from, dragEl, evt);
} else {
let otherGroup = (pull ? to : from).options.group.name;
return (value === true ||
(typeof value === 'string' && value === otherGroup) ||
(value.join && value.indexOf(otherGroup) > -1));
}
};
}
let group = {};
let 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;
},
_hideGhostForTarget = function() {
if (!supportCssPointerEvents && ghostEl) {
css(ghostEl, 'display', 'none');
}
},
_unhideGhostForTarget = function() {
if (!supportCssPointerEvents && ghostEl) {
css(ghostEl, 'display', '');
}
};
// #1184 fix - Prevent click event on fallback if dragged but item not changed position
if (documentExists && !ChromeForAndroid) {
document.addEventListener('click', function(evt) {
if (ignoreNextClick) {
evt.preventDefault();
evt.stopPropagation && evt.stopPropagation();
evt.stopImmediatePropagation && evt.stopImmediatePropagation();
ignoreNextClick = false;
return false;
}
}, true);
}
let nearestEmptyInsertDetectEvent = function(evt) {
if (dragEl) {
evt = evt.touches ? evt.touches[0] : evt;
let nearest = _detectNearestEmptySortable(evt.clientX, evt.clientY);
if (nearest) {
// Create imitation event
let event = {};
for (let i in evt) {
if (evt.hasOwnProperty(i)) {
event[i] = evt[i];
}
}
event.target = event.rootEl = nearest;
event.preventDefault = void 0;
event.stopPropagation = void 0;
nearest[expando]._onDragOver(event);
}
}
};
let _checkOutsideTargetEl = function(evt) {
if (dragEl) {
dragEl.parentNode[expando]._isOutsideThisEl(evt.target);
}
};
/**
* @class Sortable
* @param {HTMLElement} el
* @param {Object} [options]
*/
function Sortable(el, options) {
if (!(el && el.nodeType && el.nodeType === 1)) {
throw `Sortable: \`el\` must be an HTMLElement, not ${ {}.toString.call(el) }`;
}
this.el = el; // root element
this.options = options = Object.assign({}, options);
if (this.options.fallbackOnBody) {
// backwards compatibility
this.options.getFallbackParent = () => (document.body)
}
// Export instance
el[expando] = this;
let defaults = {
group: null,
sort: true,
disabled: false,
store: null,
handle: null,
draggable: /^[uo]l$/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
removeCloneOnHide: true,
direction: function() {
return _detectDirection(el, this.options);
},
ghostClass: 'sortable-ghost',
chosenClass: 'sortable-chosen',
dragClass: 'sortable-drag',
ignore: 'a, img',
filter: null,
preventOnFilter: true,
animation: 0,
easing: null,
setData: function (dataTransfer, dragEl) {
dataTransfer.setData('Text', dragEl.textContent);
},
dropBubble: false,
dragoverBubble: false,
dataIdAttr: 'data-id',
delay: 0,
delayOnTouchOnly: false,
touchStartThreshold: (Number.parseInt ? Number : window).parseInt(window.devicePixelRatio, 10) || 1,
forceFallback: false,
fallbackClass: 'sortable-fallback',
// @obsolete use `getFallbackParent: () => (document.body)`
fallbackOnBody: false,
getFallbackParent: null,
fallbackTolerance: 0,
fallbackOffset: {x: 0, y: 0},
supportPointer: Sortable.supportPointer !== false && ('PointerEvent' in window) && !Safari,
emptyInsertThreshold: 5
};
PluginManager.initializePlugins(this, el, defaults);
// Set default options
for (let name in defaults) {
!(name in options) && (options[name] = defaults[name]);
}
_prepareGroup(options);
// Bind all private methods
for (let 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;
if (this.nativeDraggable) {
// Touch start threshold cannot be greater than the native dragstart threshold
this.options.touchStartThreshold = 1;
}
// Bind events
if (options.supportPointer) {
on(el, 'pointerdown', this._onTapStart);
} else {
on(el, 'mousedown', this._onTapStart);
on(el, 'touchstart', this._onTapStart);
}
if (this.nativeDraggable) {
on(el, 'dragover', this);
on(el, 'dragenter', this);
}
sortables.push(this.el);
// Restore sorting
options.store && options.store.get && this.sort(options.store.get(this) || []);
// Add animation state manager
Object.assign(this, AnimationStateManager());
}
Sortable.prototype = /** @lends Sortable.prototype */ {
constructor: Sortable,
_isOutsideThisEl: function(target) {
if (!this.el.contains(target) && target !== this.el) {
lastTarget = null;
}
},
_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) {
if (!evt.cancelable) return;
let _this = this,
el = this.el,
options = this.options,
preventOnFilter = options.preventOnFilter,
type = evt.type,
touch = (evt.touches && evt.touches[0]) || (evt.pointerType && evt.pointerType === 'touch' && evt),
target = (touch || evt).target,
originalTarget = evt.target.shadowRoot && ((evt.path && evt.path[0]) || (evt.composedPath && evt.composedPath()[0])) || target,
filter = options.filter;
_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 and enabled
}
// cancel dnd if original target is content editable
if (originalTarget.isContentEditable) {
return;
}
// Safari ignores further event handling after mousedown
if (!this.nativeDraggable && Safari && target && target.tagName.toUpperCase() === 'SELECT') {
return;
}
target = closest(target, options.draggable, el, false);
if (target && target.animated) {
return;
}
if (lastDownEl === target) {
// Ignoring duplicate `down`
return;
}
// Get the index of the dragged element within its parent
oldIndex = index(target);
oldDraggableIndex = index(target, options.draggable);
// Check filter
if (typeof filter === 'function') {
if (filter.call(this, evt, target, this)) {
_dispatchEvent({
sortable: _this,
rootEl: originalTarget,
name: 'filter',
targetEl: target,
toEl: el,
fromEl: el
});
pluginEvent('filter', _this, { evt });
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({
sortable: _this,
rootEl: criteria,
name: 'filter',
targetEl: target,
fromEl: el,
toEl: el
});
pluginEvent('filter', _this, { evt });
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);
},
_prepareDragStart: function (/** Event */evt, /** Touch */touch, /** HTMLElement */target) {
let _this = this,
el = _this.el,
options = _this.options,
ownerDocument = el.ownerDocument,
dragStartFn;
if (target && !dragEl && (target.parentNode === el)) {
let dragRect = getRect(target);
rootEl = el;
dragEl = target;
parentEl = dragEl.parentNode;
nextEl = dragEl.nextSibling;
lastDownEl = target;
activeGroup = options.group;
Sortable.dragged = dragEl;
tapEvt = {
target: dragEl,
clientX: (touch || evt).clientX,
clientY: (touch || evt).clientY
};
tapDistanceLeft = tapEvt.clientX - dragRect.left;
tapDistanceTop = tapEvt.clientY - dragRect.top;
this._lastX = (touch || evt).clientX;
this._lastY = (touch || evt).clientY;
dragEl.style['will-change'] = 'all';
dragStartFn = function () {
pluginEvent('delayEnded', _this, { evt });
if (Sortable.eventCanceled) {
_this._onDrop();
return;
}
// Delayed drag has been triggered
// we can re-enable the events: touchmove/mousemove
_this._disableDelayedDragEvents();
if (!FireFox && _this.nativeDraggable) {
dragEl.draggable = true;
}
// Bind the events: dragstart/dragend
_this._triggerDragStart(evt, touch);
// Drag start event
_dispatchEvent({
sortable: _this,
name: 'choose',
originalEvent: evt
});
// Chosen item
toggleClass(dragEl, options.chosenClass, true);
};
// Disable "draggable"
options.ignore.split(',').forEach(function (criteria) {
find(dragEl, criteria.trim(), _disableDraggable);
});
on(ownerDocument, 'dragover', nearestEmptyInsertDetectEvent);
on(ownerDocument, 'mousemove', nearestEmptyInsertDetectEvent);
on(ownerDocument, 'touchmove', nearestEmptyInsertDetectEvent);
on(ownerDocument, 'mouseup', _this._onDrop);
on(ownerDocument, 'touchend', _this._onDrop);
on(ownerDocument, 'touchcancel', _this._onDrop);
// Make dragEl draggable (must be before delay for FireFox)
if (FireFox && this.nativeDraggable) {
this.options.touchStartThreshold = 4;
dragEl.draggable = true;
}
pluginEvent('delayStart', this, { evt });
// Delay is impossible for native DnD in Edge or IE
if (options.delay && (!options.delayOnTouchOnly || touch) && (!this.nativeDraggable || !(Edge || IE11OrLess))) {
if (Sortable.eventCanceled) {
this._onDrop();
return;
}
// 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, options.delay);
} else {
dragStartFn();
}
}
},
_delayedDragTouchMoveHandler: function (/** TouchEvent|PointerEvent **/e) {
let touch = e.touches ? e.touches[0] : e;
if (Math.max(Math.abs(touch.clientX - this._lastX), Math.abs(touch.clientY - this._lastY))
>= Math.floor(this.options.touchStartThreshold / (this.nativeDraggable && window.devicePixelRatio || 1))
) {
this._disableDelayedDrag();
}
},
_disableDelayedDrag: function () {
dragEl && _disableDraggable(dragEl);
clearTimeout(this._dragStartTimer);
this._disableDelayedDragEvents();
},
_disableDelayedDragEvents: function () {
let ownerDocument = this.el.ownerDocument;
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);
if (!this.nativeDraggable || touch) {
if (this.options.supportPointer) {
on(document, 'pointermove', this._onTouchMove);
} else if (touch) {
on(document, 'touchmove', this._onTouchMove);
} else {
on(document, 'mousemove', this._onTouchMove);
}
} 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 (fallback, evt) {
let _this = this;
awaitingDragStarted = false;
if (rootEl && dragEl) {
pluginEvent('dragStarted', this, { evt });
if (this.nativeDraggable) {
on(document, 'dragover', _checkOutsideTargetEl);
}
let options = this.options;
// Apply effect
!fallback && toggleClass(dragEl, options.dragClass, false);
toggleClass(dragEl, options.ghostClass, true);
Sortable.active = this;
fallback && this._appendGhost();
// Drag start event
_dispatchEvent({
sortable: this,
name: 'start',
originalEvent: evt
});
} else {
this._nulling();
}
},
_emulateDragOver: function () {
if (touchEvt) {
this._lastX = touchEvt.clientX;
this._lastY = touchEvt.clientY;
_hideGhostForTarget();
let target = document.elementFromPoint(touchEvt.clientX, touchEvt.clientY);
let parent = target;
while (target && target.shadowRoot) {
target = target.shadowRoot.elementFromPoint(touchEvt.clientX, touchEvt.clientY);
if (target === parent) break;
parent = target;
}
dragEl.parentNode[expando]._isOutsideThisEl(target);
if (parent) {
do {
if (parent[expando]) {
let inserted;
inserted = parent[expando]._onDragOver({
clientX: touchEvt.clientX,
clientY: touchEvt.clientY,
target: target,
rootEl: parent
});
if (inserted && !this.options.dragoverBubble) {
break;
}
}
target = parent; // store last element
}
/* jshint boss:true */
while (parent = parent.parentNode);
}
_unhideGhostForTarget();
}
},
_onTouchMove: function (/**TouchEvent*/evt) {
if (tapEvt) {
let options = this.options,
fallbackTolerance = options.fallbackTolerance,
fallbackOffset = options.fallbackOffset,
touch = evt.touches ? evt.touches[0] : evt,
ghostMatrix = ghostEl && matrix(ghostEl, true),
scaleX = ghostEl && ghostMatrix && ghostMatrix.a,
scaleY = ghostEl && ghostMatrix && ghostMatrix.d,
relativeScrollOffset = PositionGhostAbsolutely && ghostRelativeParent && getRelativeScrollOffset(ghostRelativeParent),
dx = ((touch.clientX - tapEvt.clientX)
+ fallbackOffset.x) / (scaleX || 1)
+ (relativeScrollOffset ? (relativeScrollOffset[0] - ghostRelativeParentInitialScroll[0]) : 0) / (scaleX || 1),
dy = ((touch.clientY - tapEvt.clientY)
+ fallbackOffset.y) / (scaleY || 1)
+ (relativeScrollOffset ? (relativeScrollOffset[1] - ghostRelativeParentInitialScroll[1]) : 0) / (scaleY || 1);
// only set the status to dragging, when we are actually dragging
if (!Sortable.active && !awaitingDragStarted) {
if (fallbackTolerance &&
Math.max(Math.abs(touch.clientX - this._lastX), Math.abs(touch.clientY - this._lastY)) < fallbackTolerance
) {
return;
}
this._onDragStart(evt, true);
}
if (ghostEl) {
if (ghostMatrix) {
ghostMatrix.e += dx - (lastDx || 0);
ghostMatrix.f += dy - (lastDy || 0);
} else {
ghostMatrix = {
a: 1,
b: 0,
c: 0,
d: 1,
e: dx,
f: dy
};
}
let cssMatrix = `matrix(${ghostMatrix.a},${ghostMatrix.b},${ghostMatrix.c},${ghostMatrix.d},${ghostMatrix.e},${ghostMatrix.f})`;
css(ghostEl, 'webkitTransform', cssMatrix);
css(ghostEl, 'mozTransform', cssMatrix);
css(ghostEl, 'msTransform', cssMatrix);
css(ghostEl, 'transform', cssMatrix);
lastDx = dx;
lastDy = dy;
touchEvt = touch;
}
evt.cancelable && evt.preventDefault();
}
},
_appendGhost: function () {
// Bug if using scale(): https://stackoverflow.com/questions/2637058
// Not being adjusted for
if (!ghostEl) {
let fallbackParent = typeof this.options.getFallbackParent === 'function' ? this.options.getFallbackParent() : null
let container = fallbackParent ?? rootEl,
rect = getRect(dragEl, true, PositionGhostAbsolutely, true, container),
options = this.options;
// Position absolutely
if (PositionGhostAbsolutely) {
// Get relatively positioned parent
ghostRelativeParent = container;
while (
css(ghostRelativeParent, 'position') === 'static' &&
css(ghostRelativeParent, 'transform') === 'none' &&
ghostRelativeParent !== document
) {
ghostRelativeParent = ghostRelativeParent.parentNode;
}
if (ghostRelativeParent !== document.body && ghostRelativeParent !== document.documentElement) {
if (ghostRelativeParent === document) ghostRelativeParent = getWindowScrollingElement();
rect.top += ghostRelativeParent.scrollTop;
rect.left += ghostRelativeParent.scrollLeft;
} else {
ghostRelativeParent = getWindowScrollingElement();
}
ghostRelativeParentInitialScroll = getRelativeScrollOffset(ghostRelativeParent);
}
ghostEl = dragEl.cloneNode(true);
toggleClass(ghostEl, options.ghostClass, false);
toggleClass(ghostEl, options.fallbackClass, true);
toggleClass(ghostEl, options.dragClass, true);
css(ghostEl, 'transition', '');
css(ghostEl, 'transform', '');
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', (PositionGhostAbsolutely ? 'absolute' : 'fixed'));
css(ghostEl, 'zIndex', '100000');
css(ghostEl, 'pointerEvents', 'none');
Sortable.ghost = ghostEl;
container.appendChild(ghostEl);
// Set transform-origin
css(ghostEl, 'transform-origin', (tapDistanceLeft / parseInt(ghostEl.style.width) * 100) + '% ' + (tapDistanceTop / parseInt(ghostEl.style.height) * 100) + '%');
}
},
_onDragStart: function (/**Event*/evt, /**boolean*/fallback) {
let _this = this;
let dataTransfer = evt.dataTransfer;
let options = _this.options;
pluginEvent('dragStart', this, { evt });
if (Sortable.eventCanceled) {
this._onDrop();
return;
}
pluginEvent('setupClone', this);
if (!Sortable.eventCanceled) {
cloneEl = clone(dragEl);
cloneEl.removeAttribute("id");
cloneEl.draggable = false;
cloneEl.style['will-change'] = '';
this._hideClone();
toggleClass(cloneEl, this.options.chosenClass, false);
Sortable.clone = cloneEl;
}
// #1143: IFrame support workaround
_this.cloneId = _nextTick(function() {
pluginEvent('clone', _this);
if (Sortable.eventCanceled) return;
if (!_this.options.removeCloneOnHide) {
rootEl.insertBefore(cloneEl, dragEl);
}
_this._hideClone();
_dispatchEvent({
sortable: _this,
name: 'clone'
});
});
!fallback && toggleClass(dragEl, options.dragClass, true);
// Set proper drop events
if (fallback) {
ignoreNextClick = true;
_this._loopId = setInterval(_this._emulateDragOver, 50);
} else {
// Undo what was set in _prepareDragStart before drag started
off(document, 'mouseup', _this._onDrop);
off(document, 'touchend', _this._onDrop);
off(document, 'touchcancel', _this._onDrop);
if (dataTransfer) {
dataTransfer.effectAllowed = 'move';
options.setData && options.setData.call(_this, dataTransfer, dragEl);
}
on(document, 'drop', _this);
// #1276 fix:
css(dragEl, 'transform', 'translateZ(0)');
}
awaitingDragStarted = true;
_this._dragStartId = _nextTick(_this._dragStarted.bind(_this, fallback, evt));
on(document, 'selectstart', _this);
moved = true;
if (Safari) {
css(document.body, 'user-select', 'none');
}
},
// Returns true - if no further action is needed (either inserted or another condition)
_onDragOver: function (/**Event*/evt) {
let el = this.el,
target = evt.target,