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html.sortable.js
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html.sortable.js
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;(function(root, factory) {
if (typeof define === 'function' && define.amd) {
define([], factory);
} else if (typeof exports === 'object') {
module.exports = factory();
} else {
root.sortable = factory();
}
}(this, function() {
/*
* HTML5 Sortable library
* https://github.com/voidberg/html5sortable
*
* Original code copyright 2012 Ali Farhadi.
* This version is mantained by Alexandru Badiu <andu@ctrlz.ro> & Lukas Oppermann <lukas@vea.re>
* jQuery-independent implementation by Nazar Mokrynskyi <nazar@mokrynskyi.com>
*
* Released under the MIT license.
*/
'use strict';
/*
* variables global to the plugin
*/
var dragging;
var draggingHeight;
var placeholders = [];
var sortables = [];
/**
* Get or set data on element
* @param {Element} element
* @param {string} key
* @param {*} value
* @return {*}
*/
var _data = function(element, key, value) {
if (value === undefined) {
return element && element.h5s && element.h5s.data && element.h5s.data[key];
} else {
element.h5s = element.h5s || {};
element.h5s.data = element.h5s.data || {};
element.h5s.data[key] = value;
}
};
/**
* Remove data from element
* @param {Element} element
*/
var _removeData = function(element) {
if (element.h5s) {
delete element.h5s.data;
}
};
/**
* Cross-browser shortcut for actual `Element.matches` method,
* which has vendor prefix in older browsers
*/
var matches;
switch (true) {
case 'matches' in window.Element.prototype:
matches = 'matches';
break;
case 'mozMatchesSelector' in window.Element.prototype:
matches = 'mozMatchesSelector';
break;
case 'msMatchesSelector' in window.Element.prototype:
matches = 'msMatchesSelector';
break;
case 'webkitMatchesSelector' in window.Element.prototype:
matches = 'webkitMatchesSelector';
break;
}
/**
* Filter only wanted nodes
* @param {Array|NodeList} nodes
* @param {Array/string} wanted
* @returns {Array}
*/
var _filter = function(nodes, wanted) {
if (!wanted) {
return Array.prototype.slice.call(nodes);
}
var result = [];
for (var i = 0; i < nodes.length; ++i) {
if (typeof wanted === 'string' && nodes[i][matches](wanted)) {
result.push(nodes[i]);
}
if (wanted.indexOf(nodes[i]) !== -1) {
result.push(nodes[i]);
}
}
return result;
};
/**
* @param {Array|Element} element
* @param {Array|string} event
* @param {Function} callback
*/
var _on = function(element, event, callback) {
if (element instanceof Array) {
for (var i = 0; i < element.length; ++i) {
_on(element[i], event, callback);
}
return;
}
element.addEventListener(event, callback);
element.h5s = element.h5s || {};
element.h5s.events = element.h5s.events || {};
element.h5s.events[event] = callback;
};
/**
* @param {Array|Element} element
* @param {Array|string} event
*/
var _off = function(element, event) {
if (element instanceof Array) {
for (var i = 0; i < element.length; ++i) {
_off(element[i], event);
}
return;
}
if (element.h5s && element.h5s.events && element.h5s.events[event]) {
element.removeEventListener(event, element.h5s.events[event]);
delete element.h5s.events[event];
}
};
/**
* @param {Array|Element} element
* @param {string} attribute
* @param {*} value
*/
var _attr = function(element, attribute, value) {
if (element instanceof Array) {
for (var i = 0; i < element.length; ++i) {
_attr(element[i], attribute, value);
}
return;
}
element.setAttribute(attribute, value);
};
/**
* @param {Array|Element} element
* @param {string} attribute
*/
var _removeAttr = function(element, attribute) {
if (element instanceof Array) {
for (var i = 0; i < element.length; ++i) {
_removeAttr(element[i], attribute);
}
return;
}
element.removeAttribute(attribute);
};
/**
* @param {Element} element
* @returns {{left: *, top: *}}
*/
var _offset = function(element) {
var rect = element.getClientRects()[0];
return {
left: rect.left + window.scrollX,
top: rect.top + window.scrollY
};
};
/*
* remove event handlers from items
* @param {Array|NodeList} items
*/
var _removeItemEvents = function(items) {
_off(items, 'dragstart');
_off(items, 'dragend');
_off(items, 'selectstart');
_off(items, 'dragover');
_off(items, 'dragenter');
_off(items, 'drop');
};
/*
* Remove event handlers from sortable
* @param {Element} sortable a single sortable
*/
var _removeSortableEvents = function(sortable) {
_off(sortable, 'dragover');
_off(sortable, 'dragenter');
_off(sortable, 'drop');
};
/*
* Attach ghost to dataTransfer object
* @param {Event} original event
* @param {object} ghost-object with item, x and y coordinates
*/
var _attachGhost = function(event, ghost) {
// this needs to be set for HTML5 drag & drop to work
event.dataTransfer.effectAllowed = 'move';
event.dataTransfer.setData('text', '');
// check if setDragImage method is available
if (event.dataTransfer.setDragImage) {
event.dataTransfer.setDragImage(ghost.draggedItem, ghost.x, ghost.y);
}
};
/**
* _addGhostPos clones the dragged item and adds it as a Ghost item
* @param {Event} event - the event fired when dragstart is triggered
* @param {object} ghost - .draggedItem = Element
*/
var _addGhostPos = function(event, ghost) {
if (!ghost.x) {
ghost.x = parseInt(event.pageX - _offset(ghost.draggedItem).left);
}
if (!ghost.y) {
ghost.y = parseInt(event.pageY - _offset(ghost.draggedItem).top);
}
return ghost;
};
/**
* _makeGhost decides which way to make a ghost and passes it to attachGhost
* @param {Element} draggedItem - the item that the user drags
*/
var _makeGhost = function(draggedItem) {
return {
draggedItem: draggedItem
};
};
/**
* _getGhost constructs ghost and attaches it to dataTransfer
* @param {Event} event - the original drag event object
* @param {Element} draggedItem - the item that the user drags
*/
// TODO: could draggedItem be replaced by event.target in all instances
var _getGhost = function(event, draggedItem) {
// add ghost item & draggedItem to ghost object
var ghost = _makeGhost(draggedItem);
// attach ghost position
ghost = _addGhostPos(event, ghost);
// attach ghost to dataTransfer
_attachGhost(event, ghost);
};
/*
* Remove data from sortable
* @param {Element} sortable a single sortable
*/
var _removeSortableData = function(sortable) {
_removeData(sortable);
_removeAttr(sortable, 'aria-dropeffect');
};
/*
* Remove data from items
* @param {Array|Element} items
*/
var _removeItemData = function(items) {
_removeAttr(items, 'aria-grabbed');
_removeAttr(items, 'draggable');
_removeAttr(items, 'role');
};
/*
* Check if two lists are connected
* @param {Element} curList
* @param {Element} destList
*/
var _listsConnected = function(curList, destList) {
if (curList === destList) {
return true;
}
if (_data(curList, 'connectWith') !== undefined) {
return _data(curList, 'connectWith') === _data(destList, 'connectWith');
}
return false;
};
var _getHandles = function(items, handle) {
var result = [];
var handles;
if (!handle) {
return items;
}
for (var i = 0; i < items.length; ++i) {
handles = items[i].querySelectorAll(handle);
result = result.concat(Array.prototype.slice.call(handles));
}
return result;
};
/*
* Destroy the sortable
* @param {Element} sortableElement a single sortable
*/
var _destroySortable = function(sortableElement) {
var opts = _data(sortableElement, 'opts') || {};
var items = _filter(sortableElement.children, opts.items);
var handles = _getHandles(items, opts.handle);
// remove event handlers & data from sortable
_removeSortableEvents(sortableElement);
_removeSortableData(sortableElement);
// remove event handlers & data from items
_off(handles, 'mousedown');
_removeItemEvents(items);
_removeItemData(items);
};
/*
* Enable the sortable
* @param {Element} sortableElement a single sortable
*/
var _enableSortable = function(sortableElement) {
var opts = _data(sortableElement, 'opts');
var items = _filter(sortableElement.children, opts.items);
var handles = _getHandles(items, opts.handle);
_attr(sortableElement, 'aria-dropeffect', 'move');
_attr(handles, 'draggable', 'true');
// IE FIX for ghost
// can be disabled as it has the side effect that other events
// (e.g. click) will be ignored
var spanEl = (document || window.document).createElement('span');
if (typeof spanEl.dragDrop === 'function' && !opts.disableIEFix) {
_on(handles, 'mousedown', function() {
if (items.indexOf(this) !== -1) {
this.dragDrop();
} else {
var parent = this.parentElement;
while (items.indexOf(parent) === -1) {
parent = parent.parentElement;
}
parent.dragDrop();
}
});
}
};
/*
* Disable the sortable
* @param {Element} sortableElement a single sortable
*/
var _disableSortable = function(sortableElement) {
var opts = _data(sortableElement, 'opts');
var items = _filter(sortableElement.children, opts.items);
var handles = _getHandles(items, opts.handle);
_attr(sortableElement, 'aria-dropeffect', 'none');
_attr(handles, 'draggable', 'false');
_off(handles, 'mousedown');
};
/*
* Reload the sortable
* @param {Element} sortableElement a single sortable
* @description events need to be removed to not be double bound
*/
var _reloadSortable = function(sortableElement) {
var opts = _data(sortableElement, 'opts');
var items = _filter(sortableElement.children, opts.items);
var handles = _getHandles(items, opts.handle);
// remove event handlers from items
_removeItemEvents(items);
_off(handles, 'mousedown');
// remove event handlers from sortable
_removeSortableEvents(sortableElement);
};
/**
* Get position of the element relatively to its sibling elements
* @param {Element} element
* @returns {number}
*/
var _index = function(element) {
if (!element.parentElement) {
return 0;
}
return Array.prototype.indexOf.call(element.parentElement.children, element);
};
/**
* Whether element is in DOM
* @param {Element} element
* @returns {boolean}
*/
var _attached = function(element) {
return !!element.parentNode;
};
/**
* Convert HTML string into DOM element
* @param {Element|string} html
* @returns {Element}
*/
var _html2element = function(html) {
if (typeof html !== 'string') {
return html;
}
var div = document.createElement('div');
div.innerHTML = html;
return div.firstChild;
};
/**
* Insert before target
* @param {Element} target
* @param {Element} element
*/
var _before = function(target, element) {
target.parentElement.insertBefore(
element,
target
);
};
/**
* Insert after target
* @param {Element} target
* @param {Element} element
*/
var _after = function(target, element) {
target.parentElement.insertBefore(
element,
target.nextElementSibling
);
};
/**
* Detach element from DOM
* @param {Element} element
*/
var _detach = function(element) {
if (element.parentNode) {
element.parentNode.removeChild(element);
}
};
/**
* Make native event that can be dispatched afterwards
* @param {string} name
* @param {object} detail
* @returns {CustomEvent}
*/
var _makeEvent = function(name, detail) {
var e = document.createEvent('Event');
if (detail) {
e.detail = detail;
}
e.initEvent(name, false, true);
return e;
};
/**
* @param {Element} sortableElement
* @param {CustomEvent} event
*/
var _dispatchEventOnConnected = function(sortableElement, event) {
sortables.forEach(function(target) {
if (_listsConnected(sortableElement, target)) {
target.dispatchEvent(event);
}
});
};
/*
* Public sortable object
* @param {Array|NodeList} sortableElements
* @param {object|string} options|method
*/
var sortable = function(sortableElements, options) {
var method = String(options);
options = (function(options) {
var result = {
connectWith: false,
placeholder: null,
// dragImage can be null or a Element
dragImage: null,
disableIEFix: false,
placeholderClass: 'sortable-placeholder',
draggingClass: 'sortable-dragging',
hoverClass: false
};
for (var option in options) {
result[option] = options[option];
}
return result;
})(options);
if (typeof sortableElements === 'string') {
sortableElements = document.querySelectorAll(sortableElements);
}
if (sortableElements instanceof window.Element) {
sortableElements = [sortableElements];
}
sortableElements = Array.prototype.slice.call(sortableElements);
/* TODO: maxstatements should be 25, fix and remove line below */
/*jshint maxstatements:false */
sortableElements.forEach(function(sortableElement) {
if (/enable|disable|destroy/.test(method)) {
sortable[method](sortableElement);
return;
}
// get options & set options on sortable
options = _data(sortableElement, 'opts') || options;
_data(sortableElement, 'opts', options);
// reset sortable
_reloadSortable(sortableElement);
// initialize
var items = _filter(sortableElement.children, options.items);
var index;
var startParent;
var placeholder = options.placeholder;
if (!placeholder) {
placeholder = document.createElement(
/^ul|ol$/i.test(sortableElement.tagName) ? 'li' : 'div'
);
}
placeholder = _html2element(placeholder);
placeholder.classList.add.apply(
placeholder.classList,
options.placeholderClass.split(' ')
);
// setup sortable ids
if (!sortableElement.getAttribute('data-sortable-id')) {
var id = sortables.length;
sortables[id] = sortableElement;
_attr(sortableElement, 'data-sortable-id', id);
_attr(items, 'data-item-sortable-id', id);
}
_data(sortableElement, 'items', options.items);
placeholders.push(placeholder);
if (options.connectWith) {
_data(sortableElement, 'connectWith', options.connectWith);
}
_enableSortable(sortableElement);
_attr(items, 'role', 'option');
_attr(items, 'aria-grabbed', 'false');
// Mouse over class
if (options.hoverClass) {
var hoverClass = 'sortable-over';
if (typeof options.hoverClass === 'string') {
hoverClass = options.hoverClass;
}
_on(items, 'mouseenter', function() {
this.classList.add(hoverClass);
});
_on(items, 'mouseleave', function() {
this.classList.remove(hoverClass);
});
}
// Handle drag events on draggable items
_on(items, 'dragstart', function(e) {
e.stopImmediatePropagation();
if (options.dragImage) {
_attachGhost(e, {
draggedItem: options.dragImage,
x: 0,
y: 0
});
console.log('WARNING: dragImage option is deprecated' +
' and will be removed in the future!');
} else {
// add transparent clone or other ghost to cursor
_getGhost(e, this);
}
// cache selsection & add attr for dragging
this.classList.add(options.draggingClass);
dragging = this;
_attr(dragging, 'aria-grabbed', 'true');
// grab values
index = _index(dragging);
draggingHeight = parseInt(window.getComputedStyle(dragging).height);
startParent = this.parentElement;
// dispatch sortstart event on each element in group
_dispatchEventOnConnected(sortableElement, _makeEvent('sortstart', {
item: dragging,
placeholder: placeholder,
startparent: startParent
}));
});
// Handle drag events on draggable items
_on(items, 'dragend', function() {
var newParent;
if (!dragging) {
return;
}
// remove dragging attributes and show item
dragging.classList.remove(options.draggingClass);
_attr(dragging, 'aria-grabbed', 'false');
dragging.style.display = dragging.oldDisplay;
delete dragging.oldDisplay;
placeholders.forEach(_detach);
newParent = this.parentElement;
_dispatchEventOnConnected(sortableElement, _makeEvent('sortstop', {
item: dragging,
startparent: startParent
}));
if (index !== _index(dragging) || startParent !== newParent) {
_dispatchEventOnConnected(sortableElement, _makeEvent('sortupdate', {
item: dragging,
index: _filter(newParent.children, _data(newParent, 'items'))
.indexOf(dragging),
oldindex: items.indexOf(dragging),
elementIndex: _index(dragging),
oldElementIndex: index,
startparent: startParent,
endparent: newParent
}));
}
dragging = null;
draggingHeight = null;
});
// Handle drop event on sortable & placeholder
// TODO: REMOVE placeholder?????
_on([sortableElement, placeholder], 'drop', function(e) {
var visiblePlaceholder;
if (!_listsConnected(sortableElement, dragging.parentElement)) {
return;
}
e.preventDefault();
e.stopPropagation();
visiblePlaceholder = placeholders.filter(_attached)[0];
_after(visiblePlaceholder, dragging);
dragging.dispatchEvent(_makeEvent('dragend'));
});
// Handle dragover and dragenter events on draggable items
var onDragOverEnter = function(e) {
if (!_listsConnected(sortableElement, dragging.parentElement)) {
return;
}
e.preventDefault();
e.stopPropagation();
e.dataTransfer.dropEffect = 'move';
if (items.indexOf(this) !== -1) {
var thisHeight = parseInt(window.getComputedStyle(this).height);
var placeholderIndex = _index(placeholder);
var thisIndex = _index(this);
if (options.forcePlaceholderSize) {
placeholder.style.height = draggingHeight + 'px';
}
// Check if `this` is bigger than the draggable. If it is, we have to define a dead zone to prevent flickering
if (thisHeight > draggingHeight) {
// Dead zone?
var deadZone = thisHeight - draggingHeight;
var offsetTop = _offset(this).top;
if (placeholderIndex < thisIndex &&
e.pageY < offsetTop + deadZone) {
return;
}
if (placeholderIndex > thisIndex &&
e.pageY > offsetTop + thisHeight - deadZone) {
return;
}
}
if (dragging.oldDisplay === undefined) {
dragging.oldDisplay = dragging.style.display;
}
dragging.style.display = 'none';
if (placeholderIndex < thisIndex) {
_after(this, placeholder);
} else {
_before(this, placeholder);
}
// Intentionally violated chaining, it is more complex otherwise
placeholders
.filter(function(element) {return element !== placeholder;})
.forEach(_detach);
} else {
if (placeholders.indexOf(this) === -1 &&
!_filter(this.children, options.items).length) {
placeholders.forEach(_detach);
this.appendChild(placeholder);
}
}
};
_on(items.concat(sortableElement), 'dragover', onDragOverEnter);
_on(items.concat(sortableElement), 'dragenter', onDragOverEnter);
});
return sortableElements;
};
sortable.destroy = function(sortableElement) {
_destroySortable(sortableElement);
};
sortable.enable = function(sortableElement) {
_enableSortable(sortableElement);
};
sortable.disable = function(sortableElement) {
_disableSortable(sortableElement);
};
return sortable;
}));