app/assets/javascripts/blazer/Sortable.js
/**!
* Sortable
* @author RubaXa <trash@rubaxa.org>
* @license MIT
*/
(function (factory) {
"use strict";
if (typeof define === "function" && define.amd) {
define(factory);
}
else if (typeof module != "undefined" && typeof module.exports != "undefined") {
module.exports = factory();
}
else if (typeof Package !== "undefined") {
Sortable = factory(); // export for Meteor.js
}
else {
/* jshint sub:true */
window["Sortable"] = factory();
}
})(function () {
"use strict";
var dragEl,
ghostEl,
cloneEl,
rootEl,
nextEl,
scrollEl,
scrollParentEl,
lastEl,
lastCSS,
oldIndex,
newIndex,
activeGroup,
autoScroll = {},
tapEvt,
touchEvt,
/** @const */
RSPACE = /\s+/g,
expando = 'Sortable' + (new Date).getTime(),
win = window,
document = win.document,
parseInt = win.parseInt,
supportDraggable = !!('draggable' in document.createElement('div')),
_silent = false,
abs = Math.abs,
slice = [].slice,
touchDragOverListeners = [],
_autoScroll = _throttle(function (/**Event*/evt, /**Object*/options, /**HTMLElement*/rootEl) {
// Bug: https://bugzilla.mozilla.org/show_bug.cgi?id=505521
if (rootEl && options.scroll) {
var el,
rect,
sens = options.scrollSensitivity,
speed = options.scrollSpeed,
x = evt.clientX,
y = evt.clientY,
winWidth = window.innerWidth,
winHeight = window.innerHeight,
vx,
vy
;
// Delect scrollEl
if (scrollParentEl !== rootEl) {
scrollEl = options.scroll;
scrollParentEl = rootEl;
if (scrollEl === true) {
scrollEl = rootEl;
do {
if ((scrollEl.offsetWidth < scrollEl.scrollWidth) ||
(scrollEl.offsetHeight < scrollEl.scrollHeight)
) {
break;
}
/* jshint boss:true */
} while (scrollEl = scrollEl.parentNode);
}
}
if (scrollEl) {
el = scrollEl;
rect = scrollEl.getBoundingClientRect();
vx = (abs(rect.right - x) <= sens) - (abs(rect.left - x) <= sens);
vy = (abs(rect.bottom - y) <= sens) - (abs(rect.top - y) <= sens);
}
if (!(vx || vy)) {
vx = (winWidth - x <= sens) - (x <= sens);
vy = (winHeight - y <= sens) - (y <= sens);
/* jshint expr:true */
(vx || vy) && (el = win);
}
if (autoScroll.vx !== vx || autoScroll.vy !== vy || autoScroll.el !== el) {
autoScroll.el = el;
autoScroll.vx = vx;
autoScroll.vy = vy;
clearInterval(autoScroll.pid);
if (el) {
autoScroll.pid = setInterval(function () {
if (el === win) {
win.scrollTo(win.pageXOffset + vx * speed, win.pageYOffset + vy * speed);
} else {
vy && (el.scrollTop += vy * speed);
vx && (el.scrollLeft += vx * speed);
}
}, 24);
}
}
}
}, 30)
;
/**
* @class Sortable
* @param {HTMLElement} el
* @param {Object} [options]
*/
function Sortable(el, options) {
this.el = el; // root element
this.options = options = _extend({}, options);
// Export instance
el[expando] = this;
// Default options
var defaults = {
group: Math.random(),
sort: true,
disabled: false,
store: null,
handle: null,
scroll: true,
scrollSensitivity: 30,
scrollSpeed: 10,
draggable: /[uo]l/i.test(el.nodeName) ? 'li' : '>*',
ghostClass: 'sortable-ghost',
ignore: 'a, img',
filter: null,
animation: 0,
setData: function (dataTransfer, dragEl) {
dataTransfer.setData('Text', dragEl.textContent);
},
dropBubble: false,
dragoverBubble: false,
dataIdAttr: 'data-id',
delay: 0
};
// Set default options
for (var name in defaults) {
!(name in options) && (options[name] = defaults[name]);
}
var group = options.group;
if (!group || typeof group != 'object') {
group = options.group = { name: group };
}
['pull', 'put'].forEach(function (key) {
if (!(key in group)) {
group[key] = true;
}
});
options.groups = ' ' + group.name + (group.put.join ? ' ' + group.put.join(' ') : '') + ' ';
// Bind all private methods
for (var fn in this) {
if (fn.charAt(0) === '_') {
this[fn] = _bind(this, this[fn]);
}
}
// Bind events
_on(el, 'mousedown', this._onTapStart);
_on(el, 'touchstart', this._onTapStart);
_on(el, 'dragover', this);
_on(el, 'dragenter', this);
touchDragOverListeners.push(this._onDragOver);
// Restore sorting
options.store && this.sort(options.store.get(this));
}
Sortable.prototype = /** @lends Sortable.prototype */ {
constructor: Sortable,
_onTapStart: function (/** Event|TouchEvent */evt) {
var _this = this,
el = this.el,
options = this.options,
type = evt.type,
touch = evt.touches && evt.touches[0],
target = (touch || evt).target,
originalTarget = target,
filter = options.filter;
if (type === 'mousedown' && evt.button !== 0 || options.disabled) {
return; // only left button or enabled
}
target = _closest(target, options.draggable, el);
if (!target) {
return;
}
// get the index of the dragged element within its parent
oldIndex = _index(target);
// Check filter
if (typeof filter === 'function') {
if (filter.call(this, evt, target, this)) {
_dispatchEvent(_this, originalTarget, 'filter', target, el, oldIndex);
evt.preventDefault();
return; // cancel dnd
}
}
else if (filter) {
filter = filter.split(',').some(function (criteria) {
criteria = _closest(originalTarget, criteria.trim(), el);
if (criteria) {
_dispatchEvent(_this, criteria, 'filter', target, el, oldIndex);
return true;
}
});
if (filter) {
evt.preventDefault();
return; // cancel dnd
}
}
if (options.handle && !_closest(originalTarget, options.handle, el)) {
return;
}
// Prepare `dragstart`
this._prepareDragStart(evt, touch, target);
},
_prepareDragStart: function (/** Event */evt, /** Touch */touch, /** HTMLElement */target) {
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;
nextEl = dragEl.nextSibling;
activeGroup = options.group;
dragStartFn = function () {
// Delayed drag has been triggered
// we can re-enable the events: touchmove/mousemove
_this._disableDelayedDrag();
// Make the element draggable
dragEl.draggable = true;
// Disable "draggable"
options.ignore.split(',').forEach(function (criteria) {
_find(dragEl, criteria.trim(), _disableDraggable);
});
// Bind the events: dragstart/dragend
_this._triggerDragStart(touch);
};
_on(ownerDocument, 'mouseup', _this._onDrop);
_on(ownerDocument, 'touchend', _this._onDrop);
_on(ownerDocument, 'touchcancel', _this._onDrop);
if (options.delay) {
// If the user moves the pointer before the delay has been reached:
// disable the delayed drag
_on(ownerDocument, 'mousemove', _this._disableDelayedDrag);
_on(ownerDocument, 'touchmove', _this._disableDelayedDrag);
_this._dragStartTimer = setTimeout(dragStartFn, options.delay);
} else {
dragStartFn();
}
}
},
_disableDelayedDrag: function () {
var ownerDocument = this.el.ownerDocument;
clearTimeout(this._dragStartTimer);
_off(ownerDocument, 'mousemove', this._disableDelayedDrag);
_off(ownerDocument, 'touchmove', this._disableDelayedDrag);
},
_triggerDragStart: function (/** Touch */touch) {
if (touch) {
// Touch device support
tapEvt = {
target: dragEl,
clientX: touch.clientX,
clientY: touch.clientY
};
this._onDragStart(tapEvt, 'touch');
}
else if (!supportDraggable) {
this._onDragStart(tapEvt, true);
}
else {
_on(dragEl, 'dragend', this);
_on(rootEl, 'dragstart', this._onDragStart);
}
try {
if (document.selection) {
document.selection.empty();
} else {
window.getSelection().removeAllRanges();
}
} catch (err) {
}
},
_dragStarted: function () {
if (rootEl && dragEl) {
// Apply effect
_toggleClass(dragEl, this.options.ghostClass, true);
Sortable.active = this;
// Drag start event
_dispatchEvent(this, rootEl, 'start', dragEl, rootEl, oldIndex);
}
},
_emulateDragOver: function () {
if (touchEvt) {
_css(ghostEl, 'display', 'none');
var target = document.elementFromPoint(touchEvt.clientX, touchEvt.clientY),
parent = target,
groupName = ' ' + this.options.group.name + '',
i = touchDragOverListeners.length;
if (parent) {
do {
if (parent[expando] && parent[expando].options.groups.indexOf(groupName) > -1) {
while (i--) {
touchDragOverListeners[i]({
clientX: touchEvt.clientX,
clientY: touchEvt.clientY,
target: target,
rootEl: parent
});
}
break;
}
target = parent; // store last element
}
/* jshint boss:true */
while (parent = parent.parentNode);
}
_css(ghostEl, 'display', '');
}
},
_onTouchMove: function (/**TouchEvent*/evt) {
if (tapEvt) {
var touch = evt.touches ? evt.touches[0] : evt,
dx = touch.clientX - tapEvt.clientX,
dy = touch.clientY - tapEvt.clientY,
translate3d = evt.touches ? 'translate3d(' + dx + 'px,' + dy + 'px,0)' : 'translate(' + dx + 'px,' + dy + 'px)';
touchEvt = touch;
_css(ghostEl, 'webkitTransform', translate3d);
_css(ghostEl, 'mozTransform', translate3d);
_css(ghostEl, 'msTransform', translate3d);
_css(ghostEl, 'transform', translate3d);
evt.preventDefault();
}
},
_onDragStart: function (/**Event*/evt, /**boolean*/useFallback) {
var dataTransfer = evt.dataTransfer,
options = this.options;
this._offUpEvents();
if (activeGroup.pull == 'clone') {
cloneEl = dragEl.cloneNode(true);
_css(cloneEl, 'display', 'none');
rootEl.insertBefore(cloneEl, dragEl);
}
if (useFallback) {
var rect = dragEl.getBoundingClientRect(),
css = _css(dragEl),
ghostRect;
ghostEl = dragEl.cloneNode(true);
_css(ghostEl, 'top', rect.top - parseInt(css.marginTop, 10));
_css(ghostEl, 'left', rect.left - parseInt(css.marginLeft, 10));
_css(ghostEl, 'width', rect.width);
_css(ghostEl, 'height', rect.height);
_css(ghostEl, 'opacity', '0.8');
_css(ghostEl, 'position', 'fixed');
_css(ghostEl, 'zIndex', '100000');
rootEl.appendChild(ghostEl);
// Fixing dimensions.
ghostRect = ghostEl.getBoundingClientRect();
_css(ghostEl, 'width', rect.width * 2 - ghostRect.width);
_css(ghostEl, 'height', rect.height * 2 - ghostRect.height);
if (useFallback === 'touch') {
// Bind touch events
_on(document, 'touchmove', this._onTouchMove);
_on(document, 'touchend', this._onDrop);
_on(document, 'touchcancel', this._onDrop);
} else {
// Old brwoser
_on(document, 'mousemove', this._onTouchMove);
_on(document, 'mouseup', this._onDrop);
}
this._loopId = setInterval(this._emulateDragOver, 150);
}
else {
if (dataTransfer) {
dataTransfer.effectAllowed = 'move';
options.setData && options.setData.call(this, dataTransfer, dragEl);
}
_on(document, 'drop', this);
}
setTimeout(this._dragStarted, 0);
},
_onDragOver: function (/**Event*/evt) {
var el = this.el,
target,
dragRect,
revert,
options = this.options,
group = options.group,
groupPut = group.put,
isOwner = (activeGroup === group),
canSort = options.sort;
if (evt.preventDefault !== void 0) {
evt.preventDefault();
!options.dragoverBubble && evt.stopPropagation();
}
if (activeGroup && !options.disabled &&
(isOwner
? canSort || (revert = !rootEl.contains(dragEl)) // Reverting item into the original list
: activeGroup.pull && groupPut && (
(activeGroup.name === group.name) || // by Name
(groupPut.indexOf && ~groupPut.indexOf(activeGroup.name)) // by Array
)
) &&
(evt.rootEl === void 0 || evt.rootEl === this.el) // touch fallback
) {
// Smart auto-scrolling
_autoScroll(evt, options, this.el);
if (_silent) {
return;
}
target = _closest(evt.target, options.draggable, el);
dragRect = dragEl.getBoundingClientRect();
if (revert) {
_cloneHide(true);
if (cloneEl || nextEl) {
rootEl.insertBefore(dragEl, cloneEl || nextEl);
}
else if (!canSort) {
rootEl.appendChild(dragEl);
}
return;
}
if ((el.children.length === 0) || (el.children[0] === ghostEl) ||
(el === evt.target) && (target = _ghostInBottom(el, evt))
) {
if (target) {
if (target.animated) {
return;
}
targetRect = target.getBoundingClientRect();
}
_cloneHide(isOwner);
if (_onMove(rootEl, el, dragEl, dragRect, target, targetRect) !== false) {
el.appendChild(dragEl);
this._animate(dragRect, dragEl);
target && this._animate(targetRect, target);
}
}
else if (target && !target.animated && target !== dragEl && (target.parentNode[expando] !== void 0)) {
if (lastEl !== target) {
lastEl = target;
lastCSS = _css(target);
}
var targetRect = target.getBoundingClientRect(),
width = targetRect.right - targetRect.left,
height = targetRect.bottom - targetRect.top,
floating = /left|right|inline/.test(lastCSS.cssFloat + lastCSS.display),
isWide = (target.offsetWidth > dragEl.offsetWidth),
isLong = (target.offsetHeight > dragEl.offsetHeight),
halfway = (floating ? (evt.clientX - targetRect.left) / width : (evt.clientY - targetRect.top) / height) > 0.5,
nextSibling = target.nextElementSibling,
moveVector = _onMove(rootEl, el, dragEl, dragRect, target, targetRect),
after
;
if (moveVector !== false) {
_silent = true;
setTimeout(_unsilent, 30);
_cloneHide(isOwner);
if (moveVector === 1 || moveVector === -1) {
after = (moveVector === 1);
}
else if (floating) {
after = (target.previousElementSibling === dragEl) && !isWide || halfway && isWide;
} else {
after = (nextSibling !== dragEl) && !isLong || halfway && isLong;
}
if (after && !nextSibling) {
el.appendChild(dragEl);
} else {
target.parentNode.insertBefore(dragEl, after ? nextSibling : target);
}
this._animate(dragRect, dragEl);
this._animate(targetRect, target);
}
}
}
},
_animate: function (prevRect, target) {
var ms = this.options.animation;
if (ms) {
var currentRect = target.getBoundingClientRect();
_css(target, 'transition', 'none');
_css(target, 'transform', 'translate3d('
+ (prevRect.left - currentRect.left) + 'px,'
+ (prevRect.top - currentRect.top) + 'px,0)'
);
target.offsetWidth; // repaint
_css(target, 'transition', 'all ' + ms + 'ms');
_css(target, 'transform', 'translate3d(0,0,0)');
clearTimeout(target.animated);
target.animated = setTimeout(function () {
_css(target, 'transition', '');
_css(target, 'transform', '');
target.animated = false;
}, ms);
}
},
_offUpEvents: function () {
var ownerDocument = this.el.ownerDocument;
_off(document, 'touchmove', this._onTouchMove);
_off(ownerDocument, 'mouseup', this._onDrop);
_off(ownerDocument, 'touchend', this._onDrop);
_off(ownerDocument, 'touchcancel', this._onDrop);
},
_onDrop: function (/**Event*/evt) {
var el = this.el,
options = this.options;
clearInterval(this._loopId);
clearInterval(autoScroll.pid);
clearTimeout(this._dragStartTimer);
// Unbind events
_off(document, 'drop', this);
_off(document, 'mousemove', this._onTouchMove);
_off(el, 'dragstart', this._onDragStart);
this._offUpEvents();
if (evt) {
evt.preventDefault();
!options.dropBubble && evt.stopPropagation();
ghostEl && ghostEl.parentNode.removeChild(ghostEl);
if (dragEl) {
_off(dragEl, 'dragend', this);
_disableDraggable(dragEl);
_toggleClass(dragEl, this.options.ghostClass, false);
if (rootEl !== dragEl.parentNode) {
newIndex = _index(dragEl);
// drag from one list and drop into another
_dispatchEvent(null, dragEl.parentNode, 'sort', dragEl, rootEl, oldIndex, newIndex);
_dispatchEvent(this, rootEl, 'sort', dragEl, rootEl, oldIndex, newIndex);
// Add event
_dispatchEvent(null, dragEl.parentNode, 'add', dragEl, rootEl, oldIndex, newIndex);
// Remove event
_dispatchEvent(this, rootEl, 'remove', dragEl, rootEl, oldIndex, newIndex);
}
else {
// Remove clone
cloneEl && cloneEl.parentNode.removeChild(cloneEl);
if (dragEl.nextSibling !== nextEl) {
// Get the index of the dragged element within its parent
newIndex = _index(dragEl);
// drag & drop within the same list
_dispatchEvent(this, rootEl, 'update', dragEl, rootEl, oldIndex, newIndex);
_dispatchEvent(this, rootEl, 'sort', dragEl, rootEl, oldIndex, newIndex);
}
}
if (Sortable.active) {
// Drag end event
_dispatchEvent(this, rootEl, 'end', dragEl, rootEl, oldIndex, newIndex);
// Save sorting
this.save();
}
}
// Nulling
rootEl =
dragEl =
ghostEl =
nextEl =
cloneEl =
scrollEl =
scrollParentEl =
tapEvt =
touchEvt =
lastEl =
lastCSS =
activeGroup =
Sortable.active = null;
}
},
handleEvent: function (/**Event*/evt) {
var type = evt.type;
if (type === 'dragover' || type === 'dragenter') {
if (dragEl) {
this._onDragOver(evt);
_globalDragOver(evt);
}
}
else if (type === 'drop' || type === 'dragend') {
this._onDrop(evt);
}
},
/**
* Serializes the item into an array of string.
* @returns {String[]}
*/
toArray: function () {
var order = [],
el,
children = this.el.children,
i = 0,
n = children.length,
options = this.options;
for (; i < n; i++) {
el = children[i];
if (_closest(el, options.draggable, this.el)) {
order.push(el.getAttribute(options.dataIdAttr) || _generateId(el));
}
}
return order;
},
/**
* Sorts the elements according to the array.
* @param {String[]} order order of the items
*/
sort: function (order) {
var items = {}, rootEl = this.el;
this.toArray().forEach(function (id, i) {
var el = rootEl.children[i];
if (_closest(el, this.options.draggable, rootEl)) {
items[id] = el;
}
}, this);
order.forEach(function (id) {
if (items[id]) {
rootEl.removeChild(items[id]);
rootEl.appendChild(items[id]);
}
});
},
/**
* Save the current sorting
*/
save: function () {
var store = this.options.store;
store && store.set(this);
},
/**
* For each element in the set, get the first element that matches the selector by testing the element itself and traversing up through its ancestors in the DOM tree.
* @param {HTMLElement} el
* @param {String} [selector] default: `options.draggable`
* @returns {HTMLElement|null}
*/
closest: function (el, selector) {
return _closest(el, selector || this.options.draggable, this.el);
},
/**
* Set/get option
* @param {string} name
* @param {*} [value]
* @returns {*}
*/
option: function (name, value) {
var options = this.options;
if (value === void 0) {
return options[name];
} else {
options[name] = value;
}
},
/**
* Destroy
*/
destroy: function () {
var el = this.el;
el[expando] = null;
_off(el, 'mousedown', this._onTapStart);
_off(el, 'touchstart', this._onTapStart);
_off(el, 'dragover', this);
_off(el, 'dragenter', this);
// Remove draggable attributes
Array.prototype.forEach.call(el.querySelectorAll('[draggable]'), function (el) {
el.removeAttribute('draggable');
});
touchDragOverListeners.splice(touchDragOverListeners.indexOf(this._onDragOver), 1);
this._onDrop();
this.el = el = null;
}
};
function _cloneHide(state) {
if (cloneEl && (cloneEl.state !== state)) {
_css(cloneEl, 'display', state ? 'none' : '');
!state && cloneEl.state && rootEl.insertBefore(cloneEl, dragEl);
cloneEl.state = state;
}
}
function _bind(ctx, fn) {
var args = slice.call(arguments, 2);
return fn.bind ? fn.bind.apply(fn, [ctx].concat(args)) : function () {
return fn.apply(ctx, args.concat(slice.call(arguments)));
};
}
function _closest(/**HTMLElement*/el, /**String*/selector, /**HTMLElement*/ctx) {
if (el) {
ctx = ctx || document;
selector = selector.split('.');
var tag = selector.shift().toUpperCase(),
re = new RegExp('\\s(' + selector.join('|') + ')(?=\\s)', 'g');
do {
if (
(tag === '>*' && el.parentNode === ctx) || (
(tag === '' || el.nodeName.toUpperCase() == tag) &&
(!selector.length || ((' ' + el.className + ' ').match(re) || []).length == selector.length)
)
) {
return el;
}
}
while (el !== ctx && (el = el.parentNode));
}
return null;
}
function _globalDragOver(/**Event*/evt) {
evt.dataTransfer.dropEffect = 'move';
evt.preventDefault();
}
function _on(el, event, fn) {
el.addEventListener(event, fn, false);
}
function _off(el, event, fn) {
el.removeEventListener(event, fn, false);
}
function _toggleClass(el, name, state) {
if (el) {
if (el.classList) {
el.classList[state ? 'add' : 'remove'](name);
}
else {
var className = (' ' + el.className + ' ').replace(RSPACE, ' ').replace(' ' + name + ' ', ' ');
el.className = (className + (state ? ' ' + name : '')).replace(RSPACE, ' ');
}
}
}
function _css(el, prop, val) {
var style = el && el.style;
if (style) {
if (val === void 0) {
if (document.defaultView && document.defaultView.getComputedStyle) {
val = document.defaultView.getComputedStyle(el, '');
}
else if (el.currentStyle) {
val = el.currentStyle;
}
return prop === void 0 ? val : val[prop];
}
else {
if (!(prop in style)) {
prop = '-webkit-' + prop;
}
style[prop] = val + (typeof val === 'string' ? '' : 'px');
}
}
}
function _find(ctx, tagName, iterator) {
if (ctx) {
var list = ctx.getElementsByTagName(tagName), i = 0, n = list.length;
if (iterator) {
for (; i < n; i++) {
iterator(list[i], i);
}
}
return list;
}
return [];
}
function _dispatchEvent(sortable, rootEl, name, targetEl, fromEl, startIndex, newIndex) {
var evt = document.createEvent('Event'),
options = (sortable || rootEl[expando]).options,
onName = 'on' + name.charAt(0).toUpperCase() + name.substr(1);
evt.initEvent(name, true, true);
evt.to = rootEl;
evt.from = fromEl || rootEl;
evt.item = targetEl || rootEl;
evt.clone = cloneEl;
evt.oldIndex = startIndex;
evt.newIndex = newIndex;
rootEl.dispatchEvent(evt);
if (options[onName]) {
options[onName].call(sortable, evt);
}
}
function _onMove(fromEl, toEl, dragEl, dragRect, targetEl, targetRect) {
var evt,
sortable = fromEl[expando],
onMoveFn = sortable.options.onMove,
retVal;
if (onMoveFn) {
evt = document.createEvent('Event');
evt.initEvent('move', true, true);
evt.to = toEl;
evt.from = fromEl;
evt.dragged = dragEl;
evt.draggedRect = dragRect;
evt.related = targetEl || toEl;
evt.relatedRect = targetRect || toEl.getBoundingClientRect();
retVal = onMoveFn.call(sortable, evt);
}
return retVal;
}
function _disableDraggable(el) {
el.draggable = false;
}
function _unsilent() {
_silent = false;
}
/** @returns {HTMLElement|false} */
function _ghostInBottom(el, evt) {
var lastEl = el.lastElementChild,
rect = lastEl.getBoundingClientRect();
return (evt.clientY - (rect.top + rect.height) > 5) && lastEl; // min delta
}
/**
* Generate id
* @param {HTMLElement} el
* @returns {String}
* @private
*/
function _generateId(el) {
var str = el.tagName + el.className + el.src + el.href + el.textContent,
i = str.length,
sum = 0;
while (i--) {
sum += str.charCodeAt(i);
}
return sum.toString(36);
}
/**
* Returns the index of an element within its parent
* @param el
* @returns {number}
* @private
*/
function _index(/**HTMLElement*/el) {
var index = 0;
while (el && (el = el.previousElementSibling)) {
if (el.nodeName.toUpperCase() !== 'TEMPLATE') {
index++;
}
}
return index;
}
function _throttle(callback, ms) {
var args, _this;
return function () {
if (args === void 0) {
args = arguments;
_this = this;
setTimeout(function () {
if (args.length === 1) {
callback.call(_this, args[0]);
} else {
callback.apply(_this, args);
}
args = void 0;
}, ms);
}
};
}
function _extend(dst, src) {
if (dst && src) {
for (var key in src) {
if (src.hasOwnProperty(key)) {
dst[key] = src[key];
}
}
}
return dst;
}
// Export utils
Sortable.utils = {
on: _on,
off: _off,
css: _css,
find: _find,
bind: _bind,
is: function (el, selector) {
return !!_closest(el, selector, el);
},
extend: _extend,
throttle: _throttle,
closest: _closest,
toggleClass: _toggleClass,
index: _index
};
Sortable.version = '1.2.1';
/**
* Create sortable instance
* @param {HTMLElement} el
* @param {Object} [options]
*/
Sortable.create = function (el, options) {
return new Sortable(el, options);
};
// Export
return Sortable;
});