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Sortable.js
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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,
oldDraggableIndex,
newDraggableIndex,
activeGroup,
putSortable,
autoScrolls = [],
scrolling = false,
awaitingDragStarted = false,
ignoreNextClick = false,
sortables = [],
pointerElemChangedInterval,
lastPointerElemX,
lastPointerElemY,
tapEvt,
touchEvt,
moved,
lastTarget,
lastDirection,
pastFirstInvertThresh = false,
isCircumstantialInvert = false,
lastMode, // 'swap' or 'insert'
targetMoveDistance,
// For positioning ghost absolutely
ghostRelativeParent,
ghostRelativeParentInitialScroll = [], // (left, top)
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
},
IE11OrLess = !!navigator.userAgent.match(/(?:Trident.*rv[ :]?11\.|msie|iemobile)/i),
Edge = !!navigator.userAgent.match(/Edge/i),
FireFox = !!navigator.userAgent.match(/firefox/i),
Safari = !!(navigator.userAgent.match(/safari/i) && !navigator.userAgent.match(/chrome/i) && !navigator.userAgent.match(/android/i)),
IOS = !!(navigator.userAgent.match(/iP(ad|od|hone)/i)),
PositionGhostAbsolutely = IOS,
CSSFloatProperty = Edge || IE11OrLess ? 'cssFloat' : 'float',
// This will not pass for IE9, because IE9 DnD only works on anchors
supportDraggable = ('draggable' in document.createElement('div')),
supportCssPointerEvents = (function() {
// false when <= IE11
if (IE11OrLess) {
return false;
}
var 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,
max = Math.max,
savedInputChecked = [],
_detectDirection = function(el, options) {
var 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 !== 'none') {
var 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'
);
},
/**
* 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) {
for (var i = 0; i < sortables.length; i++) {
if (_lastChild(sortables[i])) continue;
var rect = _getRect(sortables[i]),
threshold = sortables[i][expando].options.emptyInsertThreshold,
insideHorizontally = x >= (rect.left - threshold) && x <= (rect.right + threshold),
insideVertically = y >= (rect.top - threshold) && y <= (rect.bottom + threshold);
if (threshold && insideHorizontally && insideVertically) {
return sortables[i];
}
}
},
_isClientInRowColumn = function(x, y, el, axis, options) {
var targetRect = _getRect(el),
targetS1Opp = axis === 'vertical' ? targetRect.left : targetRect.top,
targetS2Opp = axis === 'vertical' ? targetRect.right : targetRect.bottom,
mouseOnOppAxis = axis === 'vertical' ? x : y;
return targetS1Opp < mouseOnOppAxis && mouseOnOppAxis < targetS2Opp;
},
_isElInRowColumn = function(el1, el2, axis) {
var el1Rect = el1 === dragEl && realDragElRect || _getRect(el1),
el2Rect = el2 === dragEl && realDragElRect || _getRect(el2),
el1S1Opp = axis === 'vertical' ? el1Rect.left : el1Rect.top,
el1S2Opp = axis === 'vertical' ? el1Rect.right : el1Rect.bottom,
el1OppLength = axis === 'vertical' ? el1Rect.width : el1Rect.height,
el2S1Opp = axis === 'vertical' ? el2Rect.left : el2Rect.top,
el2S2Opp = axis === 'vertical' ? el2Rect.right : el2Rect.bottom,
el2OppLength = axis === 'vertical' ? el2Rect.width : el2Rect.height;
return (
el1S1Opp === el2S1Opp ||
el1S2Opp === el2S2Opp ||
(el1S1Opp + el1OppLength / 2) === (el2S1Opp + el2OppLength / 2)
);
},
_getParentAutoScrollElement = function(el, includeSelf) {
// skip to window
if (!el || !el.getBoundingClientRect) return _getWindowScrollingElement();
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 _getWindowScrollingElement();
if (gotSelf || includeSelf) return elem;
gotSelf = true;
}
}
/* jshint boss:true */
} while (elem = elem.parentNode);
return _getWindowScrollingElement();
},
_getWindowScrollingElement = function() {
if (IE11OrLess) {
return document.documentElement;
} else {
return document.scrollingElement;
}
},
_scrollBy = function(el, x, y) {
el.scrollLeft += x;
el.scrollTop += y;
},
_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,
sens = options.scrollSensitivity,
speed = options.scrollSpeed,
x = evt.clientX,
y = evt.clientY,
winScroller = _getWindowScrollingElement(),
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 = currentParent,
rect = _getRect(el),
top = rect.top,
bottom = rect.bottom,
left = rect.left,
right = rect.right,
width = rect.width,
height = rect.height,
scrollWidth,
scrollHeight,
css,
vx,
vy,
canScrollX,
canScrollY,
scrollPosX,
scrollPosY;
scrollWidth = el.scrollWidth;
scrollHeight = el.scrollHeight;
css = _css(el);
scrollPosX = el.scrollLeft;
scrollPosY = el.scrollTop;
if (el === winScroller) {
canScrollX = width < scrollWidth && (css.overflowX === 'auto' || css.overflowX === 'scroll' || css.overflowX === 'visible');
canScrollY = height < scrollHeight && (css.overflowY === 'auto' || css.overflowY === 'scroll' || css.overflowY === 'visible');
} else {
canScrollX = width < scrollWidth && (css.overflowX === 'auto' || css.overflowX === 'scroll');
canScrollY = height < scrollHeight && (css.overflowY === 'auto' || css.overflowY === 'scroll');
}
vx = canScrollX && (abs(right - x) <= sens && (scrollPosX + width) < scrollWidth) - (abs(left - x) <= sens && !!scrollPosX);
vy = canScrollY && (abs(bottom - y) <= sens && (scrollPosY + height) < scrollHeight) - (abs(top - y) <= sens && !!scrollPosY);
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);
Sortable.active._onTouchMove(touchEvt, 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;
}
}
_scrollBy(autoScrolls[this.layer].el, scrollOffsetX, scrollOffsetY);
}).bind({layer: layersOut}), 24);
}
}
layersOut++;
} while (options.bubbleScroll && currentParent !== winScroller && (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 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 {
var otherGroup = (pull ? to : from).options.group.name;
return (value === true ||
(typeof value === 'string' && value === otherGroup) ||
(value.join && value.indexOf(otherGroup) > -1));
}
};
}
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 || !dragEl.parentNode) return;
dragEl.parentNode[expando] && dragEl.parentNode[expando]._computeIsAligned(evt);
},
_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
document.addEventListener('click', function(evt) {
if (ignoreNextClick) {
evt.preventDefault();
evt.stopPropagation && evt.stopPropagation();
evt.stopImmediatePropagation && evt.stopImmediatePropagation();
ignoreNextClick = false;
return false;
}
}, true);
var nearestEmptyInsertDetectEvent = function(evt) {
if (dragEl) {
evt = evt.touches ? evt.touches[0] : evt;
var nearest = _detectNearestEmptySortable(evt.clientX, evt.clientY);
if (nearest) {
// Create imitation event
var event = {};
for (var i in evt) {
event[i] = evt[i];
}
event.target = event.rootEl = nearest;
event.preventDefault = void 0;
event.stopPropagation = void 0;
nearest[expando]._onDragOver(event);
}
}
};
/**
* @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, 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
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: 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),
emptyInsertThreshold: 5
};
// Set default options
for (var name in defaults) {
!(name in options) && (options[name] = defaults[name]);
}
_prepareGroup(options);
// 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;
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) || []);
}
Sortable.prototype = /** @lends Sortable.prototype */ {
constructor: Sortable,
_computeIsAligned: function(evt) {
var target;
if (ghostEl && !supportCssPointerEvents) {
_hideGhostForTarget();
target = document.elementFromPoint(evt.clientX, evt.clientY);
_unhideGhostForTarget();
} else {
target = evt.target;
}
target = _closest(target, this.options.draggable, this.el, false);
if (_alignedSilent) return;
if (!dragEl || dragEl.parentNode !== this.el) return;
var children = this.el.children;
for (var i = 0; i < children.length; i++) {
// Don't change for target in case it is changed to aligned before onDragOver is fired
if (_closest(children[i], this.options.draggable, this.el, false) && children[i] !== target) {
children[i].sortableMouseAligned = _isClientInRowColumn(evt.clientX, evt.clientY, children[i], this._getDirection(evt, null), this.options);
}
}
// Used for nulling last target when not in element, nothing to do with checking if aligned
if (!_closest(target, this.options.draggable, this.el, true)) {
lastTarget = null;
}
_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) {
if (!evt.cancelable) return;
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,
startDraggableIndex;
_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;
}
target = _closest(target, options.draggable, el, false);
if (lastDownEl === target) {
// Ignoring duplicate `down`
return;
}
// Get the index of the dragged element within its parent
startIndex = _index(target);
startDraggableIndex = _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, undefined, startDraggableIndex);
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, undefined, startDraggableIndex);
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, startDraggableIndex);
},
_handleAutoScroll: function(evt, fallback) {
if (!dragEl || !this.options.scroll) return;
var x = evt.clientX,
y = evt.clientY,
elem = document.elementFromPoint(x, y),
_this = this;
// IE does not seem to have native autoscroll,
// Edge's autoscroll seems too conditional,
// MACOS Safari does not have autoscroll,
// Firefox and Chrome are good
if (fallback || Edge || IE11OrLess || Safari) {
_autoScroll(evt, _this.options, elem, fallback);
// 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, fallback);
}
}, 10);
lastPointerElemX = x;
lastPointerElemY = y;
}
} else {
// if DnD is enabled (and browser has good autoscrolling), first autoscroll will already scroll, so get parent autoscroll of first autoscroll
if (!_this.options.bubbleScroll || _getParentAutoScrollElement(elem, true) === _getWindowScrollingElement()) {
_clearAutoScrolls();
return;
}
_autoScroll(evt, _this.options, _getParentAutoScrollElement(elem, false), false);
}
},
_prepareDragStart: function (/** Event */evt, /** Touch */touch, /** HTMLElement */target, /** Number */startIndex, /** Number */startDraggableIndex) {
var _this = this,
el = _this.el,
options = _this.options,
ownerDocument = el.ownerDocument,
dragStartFn;
if (target && !dragEl && (target.parentNode === el)) {
rootEl = el;
dragEl = target;
parentEl = dragEl.parentNode;
nextEl = dragEl.nextSibling;
lastDownEl = target;
activeGroup = options.group;
oldIndex = startIndex;
oldDraggableIndex = startDraggableIndex;
tapEvt = {
target: dragEl,
clientX: (touch || evt).clientX,
clientY: (touch || evt).clientY
};
this._lastX = (touch || evt).clientX;
this._lastY = (touch || evt).clientY;
dragEl.style['will-change'] = 'all';
// undo animation if needed
dragEl.style.transition = '';
dragEl.style.transform = '';
dragStartFn = function () {
// 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(_this, rootEl, 'choose', dragEl, rootEl, rootEl, oldIndex, undefined, oldDraggableIndex);
// 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;
}
// Delay is impossible for native DnD in Edge or IE
if (options.delay && (options.delayOnTouchOnly ? touch : true) && (!this.nativeDraggable || !(Edge || IE11OrLess))) {
// 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) {
var touch = e.touches ? e.touches[0] : e;
if (max(abs(touch.clientX - this._lastX), 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 () {
var 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 : null);
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) {
awaitingDragStarted = false;
if (rootEl && dragEl) {
if (this.nativeDraggable) {
_on(document, 'dragover', this._handleAutoScroll);
_on(document, 'dragover', _checkAlignment);
}
var options = this.options;
// Apply effect
!fallback && _toggleClass(dragEl, options.dragClass, false);
_toggleClass(dragEl, options.ghostClass, true);
// In case dragging an animated element
_css(dragEl, 'transform', '');
Sortable.active = this;
fallback && this._appendGhost();
// Drag start event
_dispatchEvent(this, rootEl, 'start', dragEl, rootEl, rootEl, oldIndex, undefined, oldDraggableIndex, undefined, evt);
} else {
this._nulling();
}
},
_emulateDragOver: function (forAutoScroll) {
if (touchEvt) {
if (this._lastX === touchEvt.clientX && this._lastY === touchEvt.clientY && !forAutoScroll) {
return;
}
this._lastX = touchEvt.clientX;
this._lastY = touchEvt.clientY;
_hideGhostForTarget();
var target = document.elementFromPoint(touchEvt.clientX, touchEvt.clientY);
var parent = target;
while (target && target.shadowRoot) {
target = target.shadowRoot.elementFromPoint(touchEvt.clientX, touchEvt.clientY);
if (target === parent) break;
parent = target;
}
if (parent) {
do {
if (parent[expando]) {
var 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);
}
dragEl.parentNode[expando]._computeIsAligned(touchEvt);
_unhideGhostForTarget();
}
},
_onTouchMove: function (/**TouchEvent*/evt, forAutoScroll) {
if (tapEvt) {
var options = this.options,
fallbackTolerance = options.fallbackTolerance,
fallbackOffset = options.fallbackOffset,
touch = evt.touches ? evt.touches[0] : evt,
matrix = ghostEl && _matrix(ghostEl),
scaleX = ghostEl && matrix && matrix.a,
scaleY = ghostEl && matrix && matrix.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),
translate3d = evt.touches ? 'translate3d(' + dx + 'px,' + dy + 'px,0)' : 'translate(' + dx + 'px,' + dy + 'px)';
// only set the status to dragging, when we are actually dragging
if (!Sortable.active && !awaitingDragStarted) {
if (fallbackTolerance &&
min(abs(touch.clientX - this._lastX), abs(touch.clientY - this._lastY)) < fallbackTolerance
) {
return;
}
this._onDragStart(evt, true);
}
!forAutoScroll && this._handleAutoScroll(touch, true);