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| Sortable.js |
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/* ===================================================
* jquery-sortable.js v0.9.13
* http://johnny.github.com/jquery-sortable/
* ===================================================
* Copyright (c) 2012 Jonas von Andrian
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* ========================================================== */
!function ( $, window, pluginName, undefined){
var containerDefaults = {
// If true, items can be dragged from this container
drag: true,
// If true, items can be droped onto this container
drop: true,
// Exclude items from being draggable, if the
// selector matches the item
exclude: "",
// If true, search for nested containers within an item.If you nest containers,
// either the original selector with which you call the plugin must only match the top containers,
// or you need to specify a group (see the bootstrap nav example)
nested: true,
// If true, the items are assumed to be arranged vertically
vertical: true
}, // end container defaults
groupDefaults = {
// This is executed after the placeholder has been moved.
// $closestItemOrContainer contains the closest item, the placeholder
// has been put at or the closest empty Container, the placeholder has
// been appended to.
afterMove: function ($placeholder, container, $closestItemOrContainer) {
},
// The exact css path between the container and its items, e.g. "> tbody"
containerPath: "",
// The css selector of the containers
containerSelector: "ol, ul",
// Distance the mouse has to travel to start dragging
distance: 0,
// Time in milliseconds after mousedown until dragging should start.
// This option can be used to prevent unwanted drags when clicking on an element.
delay: 0,
// The css selector of the drag handle
handle: "",
// The exact css path between the item and its subcontainers.
// It should only match the immediate items of a container.
// No item of a subcontainer should be matched. E.g. for ol>div>li the itemPath is "> div"
itemPath: "",
// The css selector of the items
itemSelector: "li",
// The class given to "body" while an item is being dragged
bodyClass: "dragging",
// The class giving to an item while being dragged
draggedClass: "dragged",
// Check if the dragged item may be inside the container.
// Use with care, since the search for a valid container entails a depth first search
// and may be quite expensive.
isValidTarget: function ($item, container) {
return true
},
// Executed before onDrop if placeholder is detached.
// This happens if pullPlaceholder is set to false and the drop occurs outside a container.
onCancel: function ($item, container, _super, event) {
},
// Executed at the beginning of a mouse move event.
// The Placeholder has not been moved yet.
onDrag: function ($item, position, _super, event) {
$item.css(position)
},
// Called after the drag has been started,
// that is the mouse button is being held down and
// the mouse is moving.
// The container is the closest initialized container.
// Therefore it might not be the container, that actually contains the item.
onDragStart: function ($item, container, _super, event) {
$item.css({
height: $item.outerHeight(),
width: $item.outerWidth()
})
$item.addClass(container.group.options.draggedClass)
$("body").addClass(container.group.options.bodyClass)
},
// Called when the mouse button is being released
onDrop: function ($item, container, _super, event) {
$item.removeClass(container.group.options.draggedClass).removeAttr("style")
$("body").removeClass(container.group.options.bodyClass)
},
// Called on mousedown. If falsy value is returned, the dragging will not start.
// Ignore if element clicked is input, select or textarea
onMousedown: function ($item, _super, event) {
if (!event.target.nodeName.match(/^(input|select|textarea)$/i)) {
event.preventDefault()
return true
}
},
// The class of the placeholder (must match placeholder option markup)
placeholderClass: "placeholder",
// Template for the placeholder. Can be any valid jQuery input
// e.g. a string, a DOM element.
// The placeholder must have the class "placeholder"
placeholder: '<li class="placeholder"></li>',
// If true, the position of the placeholder is calculated on every mousemove.
// If false, it is only calculated when the mouse is above a container.
pullPlaceholder: true,
// Specifies serialization of the container group.
// The pair $parent/$children is either container/items or item/subcontainers.
serialize: function ($parent, $children, parentIsContainer) {
var result = $.extend({}, $parent.data())
if(parentIsContainer)
return [$children]
else if ($children[0]){
result.children = $children
}
delete result.subContainers
delete result.sortable
return result
},
// Set tolerance while dragging. Positive values decrease sensitivity,
// negative values increase it.
tolerance: 0
}, // end group defaults
containerGroups = {},
groupCounter = 0,
emptyBox = {
left: 0,
top: 0,
bottom: 0,
right:0
},
eventNames = {
start: "touchstart.sortable mousedown.sortable",
drop: "touchend.sortable touchcancel.sortable mouseup.sortable",
drag: "touchmove.sortable mousemove.sortable",
scroll: "scroll.sortable"
},
subContainerKey = "subContainers"
/*
* a is Array [left, right, top, bottom]
* b is array [left, top]
*/
function d(a,b) {
var x = Math.max(0, a[0] - b[0], b[0] - a[1]),
y = Math.max(0, a[2] - b[1], b[1] - a[3])
return x+y;
}
function setDimensions(array, dimensions, tolerance, useOffset) {
var i = array.length,
offsetMethod = useOffset ? "offset" : "position"
tolerance = tolerance || 0
while(i--){
var el = array[i].el ? array[i].el : $(array[i]),
// use fitting method
pos = el[offsetMethod]()
pos.left += parseInt(el.css('margin-left'), 10)
pos.top += parseInt(el.css('margin-top'),10)
dimensions[i] = [
pos.left - tolerance,
pos.left + el.outerWidth() + tolerance,
pos.top - tolerance,
pos.top + el.outerHeight() + tolerance
]
}
}
function getRelativePosition(pointer, element) {
var offset = element.offset()
return {
left: pointer.left - offset.left,
top: pointer.top - offset.top
}
}
function sortByDistanceDesc(dimensions, pointer, lastPointer) {
pointer = [pointer.left, pointer.top]
lastPointer = lastPointer && [lastPointer.left, lastPointer.top]
var dim,
i = dimensions.length,
distances = []
while(i--){
dim = dimensions[i]
distances[i] = [i,d(dim,pointer), lastPointer && d(dim, lastPointer)]
}
distances = distances.sort(function (a,b) {
return b[1] - a[1] || b[2] - a[2] || b[0] - a[0]
})
// last entry is the closest
return distances
}
function ContainerGroup(options) {
this.options = $.extend({}, groupDefaults, options)
this.containers = []
if(!this.options.rootGroup){
this.scrollProxy = $.proxy(this.scroll, this)
this.dragProxy = $.proxy(this.drag, this)
this.dropProxy = $.proxy(this.drop, this)
this.placeholder = $(this.options.placeholder)
if(!options.isValidTarget)
this.options.isValidTarget = undefined
}
}
ContainerGroup.get = function (options) {
if(!containerGroups[options.group]) {
if(options.group === undefined)
options.group = groupCounter ++
containerGroups[options.group] = new ContainerGroup(options)
}
return containerGroups[options.group]
}
ContainerGroup.prototype = {
dragInit: function (e, itemContainer) {
this.$document = $(itemContainer.el[0].ownerDocument)
// get item to drag
var closestItem = $(e.target).closest(this.options.itemSelector);
// using the length of this item, prevents the plugin from being started if there is no handle being clicked on.
// this may also be helpful in instantiating multidrag.
if (closestItem.length) {
this.item = closestItem;
this.itemContainer = itemContainer;
if (this.item.is(this.options.exclude) || !this.options.onMousedown(this.item, groupDefaults.onMousedown, e)) {
return;
}
this.setPointer(e);
this.toggleListeners('on');
this.setupDelayTimer();
this.dragInitDone = true;
}
},
drag: function (e) {
if(!this.dragging){
if(!this.distanceMet(e) || !this.delayMet)
return
this.options.onDragStart(this.item, this.itemContainer, groupDefaults.onDragStart, e)
this.item.before(this.placeholder)
this.dragging = true
}
this.setPointer(e)
// place item under the cursor
this.options.onDrag(this.item,
getRelativePosition(this.pointer, this.item.offsetParent()),
groupDefaults.onDrag,
e)
var p = this.getPointer(e),
box = this.sameResultBox,
t = this.options.tolerance
if(!box || box.top - t > p.top || box.bottom + t < p.top || box.left - t > p.left || box.right + t < p.left)
if(!this.searchValidTarget()){
this.placeholder.detach()
this.lastAppendedItem = undefined
}
},
drop: function (e) {
this.toggleListeners('off')
this.dragInitDone = false
if(this.dragging){
// processing Drop, check if placeholder is detached
if(this.placeholder.closest("html")[0]){
this.placeholder.before(this.item).detach()
} else {
this.options.onCancel(this.item, this.itemContainer, groupDefaults.onCancel, e)
}
this.options.onDrop(this.item, this.getContainer(this.item), groupDefaults.onDrop, e)
// cleanup
this.clearDimensions()
this.clearOffsetParent()
this.lastAppendedItem = this.sameResultBox = undefined
this.dragging = false
}
},
searchValidTarget: function (pointer, lastPointer) {
if(!pointer){
pointer = this.relativePointer || this.pointer
lastPointer = this.lastRelativePointer || this.lastPointer
}
var distances = sortByDistanceDesc(this.getContainerDimensions(),
pointer,
lastPointer),
i = distances.length
while(i--){
var index = distances[i][0],
distance = distances[i][1]
if(!distance || this.options.pullPlaceholder){
var container = this.containers[index]
if(!container.disabled){
if(!this.$getOffsetParent()){
var offsetParent = container.getItemOffsetParent()
pointer = getRelativePosition(pointer, offsetParent)
lastPointer = getRelativePosition(lastPointer, offsetParent)
}
if(container.searchValidTarget(pointer, lastPointer))
return true
}
}
}
if(this.sameResultBox)
this.sameResultBox = undefined
},
movePlaceholder: function (container, item, method, sameResultBox) {
var lastAppendedItem = this.lastAppendedItem
if(!sameResultBox && lastAppendedItem && lastAppendedItem[0] === item[0])
return;
item[method](this.placeholder)
this.lastAppendedItem = item
this.sameResultBox = sameResultBox
this.options.afterMove(this.placeholder, container, item)
},
getContainerDimensions: function () {
if(!this.containerDimensions)
setDimensions(this.containers, this.containerDimensions = [], this.options.tolerance, !this.$getOffsetParent())
return this.containerDimensions
},
getContainer: function (element) {
return element.closest(this.options.containerSelector).data(pluginName)
},
$getOffsetParent: function () {
if(this.offsetParent === undefined){
var i = this.containers.length - 1,
offsetParent = this.containers[i].getItemOffsetParent()
if(!this.options.rootGroup){
while(i--){
if(offsetParent[0] != this.containers[i].getItemOffsetParent()[0]){
// If every container has the same offset parent,
// use position() which is relative to this parent,
// otherwise use offset()
// compare #setDimensions
offsetParent = false
break;
}
}
}
this.offsetParent = offsetParent
}
return this.offsetParent
},
setPointer: function (e) {
var pointer = this.getPointer(e)
if(this.$getOffsetParent()){
var relativePointer = getRelativePosition(pointer, this.$getOffsetParent())
this.lastRelativePointer = this.relativePointer
this.relativePointer = relativePointer
}
this.lastPointer = this.pointer
this.pointer = pointer
},
distanceMet: function (e) {
var currentPointer = this.getPointer(e)
return (Math.max(
Math.abs(this.pointer.left - currentPointer.left),
Math.abs(this.pointer.top - currentPointer.top)
) >= this.options.distance)
},
getPointer: function(e) {
var o = e.originalEvent || e.originalEvent.touches && e.originalEvent.touches[0]
return {
left: e.pageX || o.pageX,
top: e.pageY || o.pageY
}
},
setupDelayTimer: function () {
var that = this
this.delayMet = !this.options.delay
// init delay timer if needed
if (!this.delayMet) {
clearTimeout(this._mouseDelayTimer);
this._mouseDelayTimer = setTimeout(function() {
that.delayMet = true
}, this.options.delay)
}
},
scroll: function (e) {
this.clearDimensions()
this.clearOffsetParent() // TODO is this needed?
},
toggleListeners: function (method) {
var that = this,
events = ['drag','drop','scroll']
$.each(events,function (i,event) {
that.$document[method](eventNames[event], that[event + 'Proxy'])
})
},
clearOffsetParent: function () {
this.offsetParent = undefined
},
// Recursively clear container and item dimensions
clearDimensions: function () {
this.traverse(function(object){
object._clearDimensions()
})
},
traverse: function(callback) {
callback(this)
var i = this.containers.length
while(i--){
this.containers[i].traverse(callback)
}
},
_clearDimensions: function(){
this.containerDimensions = undefined
},
_destroy: function () {
containerGroups[this.options.group] = undefined
}
}
function Container(element, options) {
this.el = element
this.options = $.extend( {}, containerDefaults, options)
this.group = ContainerGroup.get(this.options)
this.rootGroup = this.options.rootGroup || this.group
this.handle = this.rootGroup.options.handle || this.rootGroup.options.itemSelector
var itemPath = this.rootGroup.options.itemPath
this.target = itemPath ? this.el.find(itemPath) : this.el
this.target.on(eventNames.start, this.handle, $.proxy(this.dragInit, this))
if(this.options.drop)
this.group.containers.push(this)
}
Container.prototype = {
dragInit: function (e) {
var rootGroup = this.rootGroup
if( !this.disabled &&
!rootGroup.dragInitDone &&
this.options.drag &&
this.isValidDrag(e)) {
rootGroup.dragInit(e, this)
}
},
isValidDrag: function(e) {
return e.which == 1 ||
e.type == "touchstart" && e.originalEvent.touches.length == 1
},
searchValidTarget: function (pointer, lastPointer) {
var distances = sortByDistanceDesc(this.getItemDimensions(),
pointer,
lastPointer),
i = distances.length,
rootGroup = this.rootGroup,
validTarget = !rootGroup.options.isValidTarget ||
rootGroup.options.isValidTarget(rootGroup.item, this)
if(!i && validTarget){
rootGroup.movePlaceholder(this, this.target, "append")
return true
} else
while(i--){
var index = distances[i][0],
distance = distances[i][1]
if(!distance && this.hasChildGroup(index)){
var found = this.getContainerGroup(index).searchValidTarget(pointer, lastPointer)
if(found)
return true
}
else if(validTarget){
this.movePlaceholder(index, pointer)
return true
}
}
},
movePlaceholder: function (index, pointer) {
var item = $(this.items[index]),
dim = this.itemDimensions[index],
method = "after",
width = item.outerWidth(),
height = item.outerHeight(),
offset = item.offset(),
sameResultBox = {
left: offset.left,
right: offset.left + width,
top: offset.top,
bottom: offset.top + height
}
if(this.options.vertical){
var yCenter = (dim[2] + dim[3]) / 2,
inUpperHalf = pointer.top <= yCenter
if(inUpperHalf){
method = "before"
sameResultBox.bottom -= height / 2
} else
sameResultBox.top += height / 2
} else {
var xCenter = (dim[0] + dim[1]) / 2,
inLeftHalf = pointer.left <= xCenter
if(inLeftHalf){
method = "before"
sameResultBox.right -= width / 2
} else
sameResultBox.left += width / 2
}
if(this.hasChildGroup(index))
sameResultBox = emptyBox
this.rootGroup.movePlaceholder(this, item, method, sameResultBox)
},
getItemDimensions: function () {
if(!this.itemDimensions){
this.items = this.$getChildren(this.el, "item").filter(
":not(." + this.group.options.placeholderClass + ", ." + this.group.options.draggedClass + ")"
).get()
setDimensions(this.items, this.itemDimensions = [], this.options.tolerance)
}
return this.itemDimensions
},
getItemOffsetParent: function () {
var offsetParent,
el = this.el
// Since el might be empty we have to check el itself and
// can not do something like el.children().first().offsetParent()
if(el.css("position") === "relative" || el.css("position") === "absolute" || el.css("position") === "fixed")
offsetParent = el
else
offsetParent = el.offsetParent()
return offsetParent
},
hasChildGroup: function (index) {
return this.options.nested && this.getContainerGroup(index)
},
getContainerGroup: function (index) {
var childGroup = $.data(this.items[index], subContainerKey)
if( childGroup === undefined){
var childContainers = this.$getChildren(this.items[index], "container")
childGroup = false
if(childContainers[0]){
var options = $.extend({}, this.options, {
rootGroup: this.rootGroup,
group: groupCounter ++
})
childGroup = childContainers[pluginName](options).data(pluginName).group
}
$.data(this.items[index], subContainerKey, childGroup)
}
return childGroup
},
$getChildren: function (parent, type) {
var options = this.rootGroup.options,
path = options[type + "Path"],
selector = options[type + "Selector"]
parent = $(parent)
if(path)
parent = parent.find(path)
return parent.children(selector)
},
_serialize: function (parent, isContainer) {
var that = this,
childType = isContainer ? "item" : "container",
children = this.$getChildren(parent, childType).not(this.options.exclude).map(function () {
return that._serialize($(this), !isContainer)
}).get()
return this.rootGroup.options.serialize(parent, children, isContainer)
},
traverse: function(callback) {
$.each(this.items || [], function(item){
var group = $.data(this, subContainerKey)
if(group)
group.traverse(callback)
});
callback(this)
},
_clearDimensions: function () {
this.itemDimensions = undefined
},
_destroy: function() {
var that = this;
this.target.off(eventNames.start, this.handle);
this.el.removeData(pluginName)
if(this.options.drop)
this.group.containers = $.grep(this.group.containers, function(val){
return val != that
})
$.each(this.items || [], function(){
$.removeData(this, subContainerKey)
})
}
}
var API = {
enable: function() {
this.traverse(function(object){
object.disabled = false
})
},
disable: function (){
this.traverse(function(object){
object.disabled = true
})
},
serialize: function () {
return this._serialize(this.el, true)
},
refresh: function() {
this.traverse(function(object){
object._clearDimensions()
})
},
destroy: function () {
this.traverse(function(object){
object._destroy();
})
}
}
$.extend(Container.prototype, API)
/**
* jQuery API
*
* Parameters are
* either options on init
* or a method name followed by arguments to pass to the method
*/
$.fn[pluginName] = function(methodOrOptions) {
var args = Array.prototype.slice.call(arguments, 1)
return this.map(function(){
var $t = $(this),
object = $t.data(pluginName)
if(object && API[methodOrOptions])
return API[methodOrOptions].apply(object, args) || this
else if(!object && (methodOrOptions === undefined ||
typeof methodOrOptions === "object"))
$t.data(pluginName, new Container($t, methodOrOptions))
return this
});
};
}(jQuery, window, 'sortable');
| .. | |||||
| Sortable.js |