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Filename : jkanban.js
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(function(){function r(e,n,t){function o(i,f){if(!n[i]){if(!e[i]){var c="function"==typeof require&&require;if(!f&&c)return c(i,!0);if(u)return u(i,!0);var a=new Error("Cannot find module '"+i+"'");throw a.code="MODULE_NOT_FOUND",a}var p=n[i]={exports:{}};e[i][0].call(p.exports,function(r){var n=e[i][1][r];return o(n||r)},p,p.exports,r,e,n,t)}return n[i].exports}for(var u="function"==typeof require&&require,i=0;i<t.length;i++)o(t[i]);return o}return r})()({1:[function(require,module,exports){
/**
 * jKanban
 * Vanilla Javascript plugin for manage kanban boards
 *
 * @site: http://www.riccardotartaglia.it/jkanban/
 * @author: Riccardo Tartaglia
 */

//Require dragula
var dragula = require("dragula");

(function() {
  this.jKanban = function() {
    var self = this;
    var __DEFAULT_ITEM_HANDLE_OPTIONS = {
      enabled: false
    }
    this._disallowedItemProperties = [
      "id",
      "title",
      "click",
      "drag",
      "dragend",
      "drop",
      "order"
    ];
    this.element = "";
    this.container = "";
    this.boardContainer = [];
    this.handlers = [];
    this.dragula = dragula;
    this.drake = "";
    this.drakeBoard = "";
    this.addItemButton = false;
    this.buttonContent = "+";
    this.itemHandleOptions = __DEFAULT_ITEM_HANDLE_OPTIONS;
    var defaults = {
      element: "",
      gutter: "15px",
      widthBoard: "400px",
      responsive: "700",
      responsivePercentage: false,
      boards: [],
      dragBoards: true,
      dragItems: true, //whether can drag cards or not, useful when set permissions on it.
      addItemButton: false,
      buttonContent: "+",
      itemHandleOptions: __DEFAULT_ITEM_HANDLE_OPTIONS,
      dragEl: function(el, source) {},
      dragendEl: function(el) {},
      dropEl: function(el, target, source, sibling) {},
      dragBoard: function(el, source) {},
      dragendBoard: function(el) {},
      dropBoard: function(el, target, source, sibling) {},
      click: function(el) {},
      buttonClick: function(el, boardId) {}
    };

    if (arguments[0] && typeof arguments[0] === "object") {
      this.options = __extendDefaults(defaults, arguments[0]);
    }

    this.__getCanMove = function(handle) {
      if (!self.options.itemHandleOptions.enabled) {
        return !!self.options.dragItems;
      }

      if (self.options.itemHandleOptions.handleClass) {
        return handle.classList.contains(self.options.itemHandleOptions.handleClass);
      }

      return handle.classList.contains("item_handle")
    }

    this.init = function() {
      //set initial boards
      __setBoard();
      //set drag with dragula
      if (window.innerWidth > self.options.responsive) {
        //Init Drag Board
        self.drakeBoard = self
          .dragula([self.container], {
            moves: function(el, source, handle, sibling) {
              if (!self.options.dragBoards) return false;
              return (
                handle.classList.contains("kanban-board-header") ||
                handle.classList.contains("kanban-title-board")
              );
            },
            accepts: function(el, target, source, sibling) {
              return target.classList.contains("kanban-container");
            },
            revertOnSpill: true,
            direction: "horizontal"
          })
          .on("drag", function(el, source) {
            el.classList.add("is-moving");
            self.options.dragBoard(el, source);
            if (typeof el.dragfn === "function") el.dragfn(el, source);
          })
          .on("dragend", function(el) {
            __updateBoardsOrder();
            el.classList.remove("is-moving");
            self.options.dragendBoard(el);
            if (typeof el.dragendfn === "function") el.dragendfn(el);
          })
          .on("drop", function(el, target, source, sibling) {
            el.classList.remove("is-moving");
            self.options.dropBoard(el, target, source, sibling);
            if (typeof el.dropfn === "function")
              el.dropfn(el, target, source, sibling);
          });

        //Init Drag Item
        self.drake = self
          .dragula(self.boardContainer, {
            moves: function(el, source, handle, sibling) {
              return self.__getCanMove(handle);
            },
            revertOnSpill: true
          })
          .on("cancel", function(el, container, source) {
            self.enableAllBoards();
          })
          .on("drag", function(el, source) {
            var elClass = el.getAttribute("class");
            if (elClass !== "" && elClass.indexOf("not-draggable") > -1) {
              self.drake.cancel(true);
              return;
            }

            el.classList.add("is-moving");
            var boardJSON = __findBoardJSON(source.parentNode.dataset.id);
            if (boardJSON.dragTo !== undefined) {
              self.options.boards.map(function(board) {
                if (
                  boardJSON.dragTo.indexOf(board.id) === -1 &&
                  board.id !== source.parentNode.dataset.id
                ) {
                  self.findBoard(board.id).classList.add("disabled-board");
                }
              });
            }

            self.options.dragEl(el, source);
            if (el !== null && typeof el.dragfn === "function")
              el.dragfn(el, source);
          })
          .on("dragend", function(el) {
            self.options.dragendEl(el);
            if (el !== null && typeof el.dragendfn === "function")
              el.dragendfn(el);
          })
          .on("drop", function(el, target, source, sibling) {
            self.enableAllBoards();

            var boardJSON = __findBoardJSON(source.parentNode.dataset.id);
            if (boardJSON.dragTo !== undefined) {
              if (
                boardJSON.dragTo.indexOf(target.parentNode.dataset.id) === -1 &&
                target.parentNode.dataset.id !== source.parentNode.dataset.id
              ) {
                self.drake.cancel(true);
              }
            }
            if (el !== null) {
              var result = self.options.dropEl(el, target, source, sibling);
              if (result === false) {
                self.drake.cancel(true);
              }
              el.classList.remove("is-moving");
              if (typeof el.dropfn === "function")
                el.dropfn(el, target, source, sibling);
            }
          });
      }
    };

    this.enableAllBoards = function() {
      var allB = document.querySelectorAll(".kanban-board");
      if (allB.length > 0 && allB !== undefined) {
        for (var i = 0; i < allB.length; i++) {
          allB[i].classList.remove("disabled-board");
        }
      }
    };

    this.addElement = function(boardID, element) {
      var board = self.element.querySelector(
        '[data-id="' + boardID + '"] .kanban-drag'
      );
      var nodeItem = document.createElement("div");
      nodeItem.classList.add("kanban-item");
      if (typeof element.id !== "undefined" && element.id !== "") {
        nodeItem.setAttribute("data-eid", element.id);
      }
      if(element.class && Array.isArray(element.class)) {
	element.class.forEach( function(cl){
	  nodeItem.classList.add(cl);
	})
      }
      nodeItem.innerHTML = __buildItemTitle(element.title);
      //add function
      nodeItem.clickfn = element.click;
      nodeItem.dragfn = element.drag;
      nodeItem.dragendfn = element.dragend;
      nodeItem.dropfn = element.drop;
      __appendCustomProperties(nodeItem, element);
      __onclickHandler(nodeItem);
      if (self.options.itemHandleOptions.enabled) {
        nodeItem.style.cursor = "default";
      }
      board.appendChild(nodeItem);
      return self;
    };

    this.addForm = function(boardID, formItem) {
      var board = self.element.querySelector(
        '[data-id="' + boardID + '"] .kanban-drag'
      );
      var _attribute = formItem.getAttribute("class");
      formItem.setAttribute("class", _attribute + " not-draggable");
      board.appendChild(formItem);
      return self;
    };

    this.addBoards = function(boards, isInit) {
      if (self.options.responsivePercentage) {
        self.container.style.width = "100%";
        self.options.gutter = "1%";
        if (window.innerWidth > self.options.responsive) {
          var boardWidth = (100 - boards.length * 2) / boards.length;
        } else {
          var boardWidth = 100 - boards.length * 2;
        }
      } else {
        var boardWidth = self.options.widthBoard;
      }
      var addButton = self.options.addItemButton;
      var buttonContent = self.options.buttonContent;

      //for on all the boards
      for (var boardkey in boards) {
        // single board
        var board = boards[boardkey];
        if (!isInit) {
          self.options.boards.push(board);
        }

        if (!self.options.responsivePercentage) {
          //add width to container
          if (self.container.style.width === "") {
            self.container.style.width =
              parseInt(boardWidth) + parseInt(self.options.gutter) * 2 + "px";
          } else {
            self.container.style.width =
              parseInt(self.container.style.width) +
              parseInt(boardWidth) +
              parseInt(self.options.gutter) * 2 +
              "px";
          }
        }
        //create node
        var boardNode = document.createElement("div");
        boardNode.dataset.id = board.id;
        boardNode.dataset.order = self.container.childNodes.length + 1;
        boardNode.classList.add("kanban-board");
        //set style
        if (self.options.responsivePercentage) {
          boardNode.style.width = boardWidth + "%";
        } else {
          boardNode.style.width = boardWidth;
        }
        boardNode.style.marginLeft = self.options.gutter;
        boardNode.style.marginRight = self.options.gutter;
        // header board
        var headerBoard = document.createElement("header");
        if (board.class !== "" && board.class !== undefined)
          var allClasses = board.class.split(",");
        else allClasses = [];
        headerBoard.classList.add("kanban-board-header");
        allClasses.map(function(value) {
          headerBoard.classList.add(value);
        });
        headerBoard.innerHTML =
          '<div class="kanban-title-board">' + board.title + "</div>";
        // if add button is true, add button to the board
        if (addButton) {
          var btn = document.createElement("BUTTON");
          var t = document.createTextNode(buttonContent);
          btn.setAttribute(
            "class",
            "kanban-title-button btn btn-default btn-xs"
          );
          btn.appendChild(t);
          //var buttonHtml = '<button class="kanban-title-button btn btn-default btn-xs">'+buttonContent+'</button>'
          headerBoard.appendChild(btn);
          __onButtonClickHandler(btn, board.id);
        }
        //content board
        var contentBoard = document.createElement("main");
        contentBoard.classList.add("kanban-drag");
        if (board.bodyClass !== "" && board.bodyClass !== undefined)
          var bodyClasses = board.bodyClass.split(",");
        else bodyClasses = [];
        bodyClasses.map(function(value) {
          contentBoard.classList.add(value);
        });
        //add drag to array for dragula
        self.boardContainer.push(contentBoard);
        for (var itemkey in board.item) {
          //create item
          var itemKanban = board.item[itemkey];
          var nodeItem = document.createElement("div");
          nodeItem.classList.add("kanban-item");
          if (itemKanban.id) {
            nodeItem.dataset.eid = itemKanban.id;
          }
          if(itemKanban.class && Array.isArray(itemKanban.class)) {
            itemKanban.class.forEach( function(cl){
              nodeItem.classList.add(cl);
            })
          }
          nodeItem.innerHTML = __buildItemTitle(itemKanban.title);
          //add function
          nodeItem.clickfn = itemKanban.click;
          nodeItem.dragfn = itemKanban.drag;
          nodeItem.dragendfn = itemKanban.dragend;
          nodeItem.dropfn = itemKanban.drop;
          __appendCustomProperties(nodeItem, itemKanban);
          //add click handler of item
          __onclickHandler(nodeItem);
          if (self.options.itemHandleOptions.enabled) {
            nodeItem.style.cursor = "default";
          }
          contentBoard.appendChild(nodeItem);
        }
        //footer board
        var footerBoard = document.createElement("footer");
        //board assembly
        boardNode.appendChild(headerBoard);
        boardNode.appendChild(contentBoard);
        boardNode.appendChild(footerBoard);
        //board add
        self.container.appendChild(boardNode);
      }
      return self;
    };

    this.findBoard = function(id) {
      var el = self.element.querySelector('[data-id="' + id + '"]');
      return el;
    };

    this.getParentBoardID = function(el) {
      if (typeof el === "string") {
        el = self.element.querySelector('[data-eid="' + el + '"]');
      }
      if (el === null) {
        return null;
      }
      return el.parentNode.parentNode.dataset.id;
    };

    this.moveElement = function(targetBoardID, elementID, element) {
      if (targetBoardID === this.getParentBoardID(elementID)) {
        return;
      }

      this.removeElement(elementID);
      return this.addElement(targetBoardID, element);
    };

    this.replaceElement = function(el, element) {
      var nodeItem = el;
      if (typeof nodeItem === "string") {
        nodeItem = self.element.querySelector('[data-eid="' + el + '"]');
      }
      nodeItem.innerHTML = element.title;
      // add function
      nodeItem.clickfn = element.click;
      nodeItem.dragfn = element.drag;
      nodeItem.dragendfn = element.dragend;
      nodeItem.dropfn = element.drop;
      __appendCustomProperties(nodeItem, element);
      return self;
    };

    this.findElement = function(id) {
      var el = self.element.querySelector('[data-eid="' + id + '"]');
      return el;
    };

    this.getBoardElements = function(id) {
      var board = self.element.querySelector(
        '[data-id="' + id + '"] .kanban-drag'
      );
      return board.childNodes;
    };

    this.removeElement = function(el) {
      if (typeof el === "string")
        el = self.element.querySelector('[data-eid="' + el + '"]');
      if (el !== null) {
        el.remove();
      }
      return self;
    };

    this.removeBoard = function(board) {
      var boardElement = null;
      if (typeof board === "string")
        boardElement = self.element.querySelector('[data-id="' + board + '"]');
      if (boardElement !== null) {
        boardElement.remove();
      }

      // remove thboard in options.boards
	    for(var i = 0; i < self.options.boards.length; i++) {
		    if(self.options.boards[i].id === board) {
			    self.options.boards.splice(i, 1);
			    break;
		    }
	    }

      return self;
    };

    // board button on click function
    this.onButtonClick = function(el) {};
    //PRIVATE FUNCTION
    function __extendDefaults(source, properties) {
      var property;
      for (property in properties) {
        if (properties.hasOwnProperty(property)) {
          source[property] = properties[property];
        }
      }
      return source;
    }

    function __setBoard() {
      self.element = document.querySelector(self.options.element);
      //create container
      var boardContainer = document.createElement("div");
      boardContainer.classList.add("kanban-container");
      self.container = boardContainer;
      //add boards
      self.addBoards(self.options.boards, true);
      //appends to container
      self.element.appendChild(self.container);
    }

    function __onclickHandler(nodeItem, clickfn) {
      nodeItem.addEventListener("click", function(e) {
        e.preventDefault();
        self.options.click(this);
        if (typeof this.clickfn === "function") this.clickfn(this);
      });
    }

    function __onButtonClickHandler(nodeItem, boardId) {
      nodeItem.addEventListener("click", function(e) {
        e.preventDefault();
        self.options.buttonClick(this, boardId);
        // if(typeof(this.clickfn) === 'function')
        //     this.clickfn(this);
      });
    }

    function __findBoardJSON(id) {
      var el = [];
      self.options.boards.map(function(board) {
        if (board.id === id) {
          return el.push(board);
        }
      });
      return el[0];
    }

    function __appendCustomProperties(element, parentObject) {
      for (var propertyName in parentObject) {
        if (self._disallowedItemProperties.indexOf(propertyName) > -1) {
          continue;
        }

        element.setAttribute(
          "data-" + propertyName,
          parentObject[propertyName]
        );
      }
    }

    function __updateBoardsOrder() {
      var index = 1;
      for (var i = 0; i < self.container.childNodes.length; i++) {
        self.container.childNodes[i].dataset.order = index++;
      }
    }

    function __buildItemTitle(title) {
      var result = title;
      if (self.options.itemHandleOptions.enabled) {
        if ((self.options.itemHandleOptions.customHandler || undefined) === undefined) {
          var customCssHandler = self.options.itemHandleOptions.customCssHandler;
          var customCssIconHandler = self.options.itemHandleOptions.customCssIconHandler;
          if ((customCssHandler || undefined) === undefined) {
            customCssHandler = "drag_handler";
          }
          if ((customCssIconHandler || undefined) === undefined) {
            customCssIconHandler = customCssHandler + "_icon";
          }

          result = "<div class='item_handle "+customCssHandler+"'><i class='item_handle "+customCssIconHandler+"'></i></div><div>" + result + "</div>";
        } else {
          result = self.options.itemHandleOptions.customHandler.replace("%s", result);
        }
      }
      return result;
    }

    //init plugin
    this.init();
  };
})();

},{"dragula":9}],2:[function(require,module,exports){
module.exports = function atoa (a, n) { return Array.prototype.slice.call(a, n); }

},{}],3:[function(require,module,exports){
'use strict';

var ticky = require('ticky');

module.exports = function debounce (fn, args, ctx) {
  if (!fn) { return; }
  ticky(function run () {
    fn.apply(ctx || null, args || []);
  });
};

},{"ticky":11}],4:[function(require,module,exports){
'use strict';

var atoa = require('atoa');
var debounce = require('./debounce');

module.exports = function emitter (thing, options) {
  var opts = options || {};
  var evt = {};
  if (thing === undefined) { thing = {}; }
  thing.on = function (type, fn) {
    if (!evt[type]) {
      evt[type] = [fn];
    } else {
      evt[type].push(fn);
    }
    return thing;
  };
  thing.once = function (type, fn) {
    fn._once = true; // thing.off(fn) still works!
    thing.on(type, fn);
    return thing;
  };
  thing.off = function (type, fn) {
    var c = arguments.length;
    if (c === 1) {
      delete evt[type];
    } else if (c === 0) {
      evt = {};
    } else {
      var et = evt[type];
      if (!et) { return thing; }
      et.splice(et.indexOf(fn), 1);
    }
    return thing;
  };
  thing.emit = function () {
    var args = atoa(arguments);
    return thing.emitterSnapshot(args.shift()).apply(this, args);
  };
  thing.emitterSnapshot = function (type) {
    var et = (evt[type] || []).slice(0);
    return function () {
      var args = atoa(arguments);
      var ctx = this || thing;
      if (type === 'error' && opts.throws !== false && !et.length) { throw args.length === 1 ? args[0] : args; }
      et.forEach(function emitter (listen) {
        if (opts.async) { debounce(listen, args, ctx); } else { listen.apply(ctx, args); }
        if (listen._once) { thing.off(type, listen); }
      });
      return thing;
    };
  };
  return thing;
};

},{"./debounce":3,"atoa":2}],5:[function(require,module,exports){
(function (global){
'use strict';

var customEvent = require('custom-event');
var eventmap = require('./eventmap');
var doc = global.document;
var addEvent = addEventEasy;
var removeEvent = removeEventEasy;
var hardCache = [];

if (!global.addEventListener) {
  addEvent = addEventHard;
  removeEvent = removeEventHard;
}

module.exports = {
  add: addEvent,
  remove: removeEvent,
  fabricate: fabricateEvent
};

function addEventEasy (el, type, fn, capturing) {
  return el.addEventListener(type, fn, capturing);
}

function addEventHard (el, type, fn) {
  return el.attachEvent('on' + type, wrap(el, type, fn));
}

function removeEventEasy (el, type, fn, capturing) {
  return el.removeEventListener(type, fn, capturing);
}

function removeEventHard (el, type, fn) {
  var listener = unwrap(el, type, fn);
  if (listener) {
    return el.detachEvent('on' + type, listener);
  }
}

function fabricateEvent (el, type, model) {
  var e = eventmap.indexOf(type) === -1 ? makeCustomEvent() : makeClassicEvent();
  if (el.dispatchEvent) {
    el.dispatchEvent(e);
  } else {
    el.fireEvent('on' + type, e);
  }
  function makeClassicEvent () {
    var e;
    if (doc.createEvent) {
      e = doc.createEvent('Event');
      e.initEvent(type, true, true);
    } else if (doc.createEventObject) {
      e = doc.createEventObject();
    }
    return e;
  }
  function makeCustomEvent () {
    return new customEvent(type, { detail: model });
  }
}

function wrapperFactory (el, type, fn) {
  return function wrapper (originalEvent) {
    var e = originalEvent || global.event;
    e.target = e.target || e.srcElement;
    e.preventDefault = e.preventDefault || function preventDefault () { e.returnValue = false; };
    e.stopPropagation = e.stopPropagation || function stopPropagation () { e.cancelBubble = true; };
    e.which = e.which || e.keyCode;
    fn.call(el, e);
  };
}

function wrap (el, type, fn) {
  var wrapper = unwrap(el, type, fn) || wrapperFactory(el, type, fn);
  hardCache.push({
    wrapper: wrapper,
    element: el,
    type: type,
    fn: fn
  });
  return wrapper;
}

function unwrap (el, type, fn) {
  var i = find(el, type, fn);
  if (i) {
    var wrapper = hardCache[i].wrapper;
    hardCache.splice(i, 1); // free up a tad of memory
    return wrapper;
  }
}

function find (el, type, fn) {
  var i, item;
  for (i = 0; i < hardCache.length; i++) {
    item = hardCache[i];
    if (item.element === el && item.type === type && item.fn === fn) {
      return i;
    }
  }
}

}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"./eventmap":6,"custom-event":7}],6:[function(require,module,exports){
(function (global){
'use strict';

var eventmap = [];
var eventname = '';
var ron = /^on/;

for (eventname in global) {
  if (ron.test(eventname)) {
    eventmap.push(eventname.slice(2));
  }
}

module.exports = eventmap;

}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{}],7:[function(require,module,exports){
(function (global){

var NativeCustomEvent = global.CustomEvent;

function useNative () {
  try {
    var p = new NativeCustomEvent('cat', { detail: { foo: 'bar' } });
    return  'cat' === p.type && 'bar' === p.detail.foo;
  } catch (e) {
  }
  return false;
}

/**
 * Cross-browser `CustomEvent` constructor.
 *
 * https://developer.mozilla.org/en-US/docs/Web/API/CustomEvent.CustomEvent
 *
 * @public
 */

module.exports = useNative() ? NativeCustomEvent :

// IE >= 9
'function' === typeof document.createEvent ? function CustomEvent (type, params) {
  var e = document.createEvent('CustomEvent');
  if (params) {
    e.initCustomEvent(type, params.bubbles, params.cancelable, params.detail);
  } else {
    e.initCustomEvent(type, false, false, void 0);
  }
  return e;
} :

// IE <= 8
function CustomEvent (type, params) {
  var e = document.createEventObject();
  e.type = type;
  if (params) {
    e.bubbles = Boolean(params.bubbles);
    e.cancelable = Boolean(params.cancelable);
    e.detail = params.detail;
  } else {
    e.bubbles = false;
    e.cancelable = false;
    e.detail = void 0;
  }
  return e;
}

}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{}],8:[function(require,module,exports){
'use strict';

var cache = {};
var start = '(?:^|\\s)';
var end = '(?:\\s|$)';

function lookupClass (className) {
  var cached = cache[className];
  if (cached) {
    cached.lastIndex = 0;
  } else {
    cache[className] = cached = new RegExp(start + className + end, 'g');
  }
  return cached;
}

function addClass (el, className) {
  var current = el.className;
  if (!current.length) {
    el.className = className;
  } else if (!lookupClass(className).test(current)) {
    el.className += ' ' + className;
  }
}

function rmClass (el, className) {
  el.className = el.className.replace(lookupClass(className), ' ').trim();
}

module.exports = {
  add: addClass,
  rm: rmClass
};

},{}],9:[function(require,module,exports){
(function (global){
'use strict';

var emitter = require('contra/emitter');
var crossvent = require('crossvent');
var classes = require('./classes');
var doc = document;
var documentElement = doc.documentElement;

function dragula (initialContainers, options) {
  var len = arguments.length;
  if (len === 1 && Array.isArray(initialContainers) === false) {
    options = initialContainers;
    initialContainers = [];
  }
  var _mirror; // mirror image
  var _source; // source container
  var _item; // item being dragged
  var _offsetX; // reference x
  var _offsetY; // reference y
  var _moveX; // reference move x
  var _moveY; // reference move y
  var _initialSibling; // reference sibling when grabbed
  var _currentSibling; // reference sibling now
  var _copy; // item used for copying
  var _renderTimer; // timer for setTimeout renderMirrorImage
  var _lastDropTarget = null; // last container item was over
  var _grabbed; // holds mousedown context until first mousemove

  var o = options || {};
  if (o.moves === void 0) { o.moves = always; }
  if (o.accepts === void 0) { o.accepts = always; }
  if (o.invalid === void 0) { o.invalid = invalidTarget; }
  if (o.containers === void 0) { o.containers = initialContainers || []; }
  if (o.isContainer === void 0) { o.isContainer = never; }
  if (o.copy === void 0) { o.copy = false; }
  if (o.copySortSource === void 0) { o.copySortSource = false; }
  if (o.revertOnSpill === void 0) { o.revertOnSpill = false; }
  if (o.removeOnSpill === void 0) { o.removeOnSpill = false; }
  if (o.direction === void 0) { o.direction = 'vertical'; }
  if (o.ignoreInputTextSelection === void 0) { o.ignoreInputTextSelection = true; }
  if (o.mirrorContainer === void 0) { o.mirrorContainer = doc.body; }

  var drake = emitter({
    containers: o.containers,
    start: manualStart,
    end: end,
    cancel: cancel,
    remove: remove,
    destroy: destroy,
    canMove: canMove,
    dragging: false
  });

  if (o.removeOnSpill === true) {
    drake.on('over', spillOver).on('out', spillOut);
  }

  events();

  return drake;

  function isContainer (el) {
    return drake.containers.indexOf(el) !== -1 || o.isContainer(el);
  }

  function events (remove) {
    var op = remove ? 'remove' : 'add';
    touchy(documentElement, op, 'mousedown', grab);
    touchy(documentElement, op, 'mouseup', release);
  }

  function eventualMovements (remove) {
    var op = remove ? 'remove' : 'add';
    touchy(documentElement, op, 'mousemove', startBecauseMouseMoved);
  }

  function movements (remove) {
    var op = remove ? 'remove' : 'add';
    crossvent[op](documentElement, 'selectstart', preventGrabbed); // IE8
    crossvent[op](documentElement, 'click', preventGrabbed);
  }

  function destroy () {
    events(true);
    release({});
  }

  function preventGrabbed (e) {
    if (_grabbed) {
      e.preventDefault();
    }
  }

  function grab (e) {
    _moveX = e.clientX;
    _moveY = e.clientY;

    var ignore = whichMouseButton(e) !== 1 || e.metaKey || e.ctrlKey;
    if (ignore) {
      return; // we only care about honest-to-god left clicks and touch events
    }
    var item = e.target;
    var context = canStart(item);
    if (!context) {
      return;
    }
    _grabbed = context;
    eventualMovements();
    if (e.type === 'mousedown') {
      if (isInput(item)) { // see also: https://github.com/bevacqua/dragula/issues/208
        item.focus(); // fixes https://github.com/bevacqua/dragula/issues/176
      } else {
        e.preventDefault(); // fixes https://github.com/bevacqua/dragula/issues/155
      }
    }
  }

  function startBecauseMouseMoved (e) {
    if (!_grabbed) {
      return;
    }
    if (whichMouseButton(e) === 0) {
      release({});
      return; // when text is selected on an input and then dragged, mouseup doesn't fire. this is our only hope
    }
    // truthy check fixes #239, equality fixes #207
    if (e.clientX !== void 0 && e.clientX === _moveX && e.clientY !== void 0 && e.clientY === _moveY) {
      return;
    }
    if (o.ignoreInputTextSelection) {
      var clientX = getCoord('clientX', e);
      var clientY = getCoord('clientY', e);
      var elementBehindCursor = doc.elementFromPoint(clientX, clientY);
      if (isInput(elementBehindCursor)) {
        return;
      }
    }

    var grabbed = _grabbed; // call to end() unsets _grabbed
    eventualMovements(true);
    movements();
    end();
    start(grabbed);

    var offset = getOffset(_item);
    _offsetX = getCoord('pageX', e) - offset.left;
    _offsetY = getCoord('pageY', e) - offset.top;

    classes.add(_copy || _item, 'gu-transit');
    renderMirrorImage();
    drag(e);
  }

  function canStart (item) {
    if (drake.dragging && _mirror) {
      return;
    }
    if (isContainer(item)) {
      return; // don't drag container itself
    }
    var handle = item;
    while (getParent(item) && isContainer(getParent(item)) === false) {
      if (o.invalid(item, handle)) {
        return;
      }
      item = getParent(item); // drag target should be a top element
      if (!item) {
        return;
      }
    }
    var source = getParent(item);
    if (!source) {
      return;
    }
    if (o.invalid(item, handle)) {
      return;
    }

    var movable = o.moves(item, source, handle, nextEl(item));
    if (!movable) {
      return;
    }

    return {
      item: item,
      source: source
    };
  }

  function canMove (item) {
    return !!canStart(item);
  }

  function manualStart (item) {
    var context = canStart(item);
    if (context) {
      start(context);
    }
  }

  function start (context) {
    if (isCopy(context.item, context.source)) {
      _copy = context.item.cloneNode(true);
      drake.emit('cloned', _copy, context.item, 'copy');
    }

    _source = context.source;
    _item = context.item;
    _initialSibling = _currentSibling = nextEl(context.item);

    drake.dragging = true;
    drake.emit('drag', _item, _source);
  }

  function invalidTarget () {
    return false;
  }

  function end () {
    if (!drake.dragging) {
      return;
    }
    var item = _copy || _item;
    drop(item, getParent(item));
  }

  function ungrab () {
    _grabbed = false;
    eventualMovements(true);
    movements(true);
  }

  function release (e) {
    ungrab();

    if (!drake.dragging) {
      return;
    }
    var item = _copy || _item;
    var clientX = getCoord('clientX', e);
    var clientY = getCoord('clientY', e);
    var elementBehindCursor = getElementBehindPoint(_mirror, clientX, clientY);
    var dropTarget = findDropTarget(elementBehindCursor, clientX, clientY);
    if (dropTarget && ((_copy && o.copySortSource) || (!_copy || dropTarget !== _source))) {
      drop(item, dropTarget);
    } else if (o.removeOnSpill) {
      remove();
    } else {
      cancel();
    }
  }

  function drop (item, target) {
    var parent = getParent(item);
    if (_copy && o.copySortSource && target === _source) {
      parent.removeChild(_item);
    }
    if (isInitialPlacement(target)) {
      drake.emit('cancel', item, _source, _source);
    } else {
      drake.emit('drop', item, target, _source, _currentSibling);
    }
    cleanup();
  }

  function remove () {
    if (!drake.dragging) {
      return;
    }
    var item = _copy || _item;
    var parent = getParent(item);
    if (parent) {
      parent.removeChild(item);
    }
    drake.emit(_copy ? 'cancel' : 'remove', item, parent, _source);
    cleanup();
  }

  function cancel (revert) {
    if (!drake.dragging) {
      return;
    }
    var reverts = arguments.length > 0 ? revert : o.revertOnSpill;
    var item = _copy || _item;
    var parent = getParent(item);
    var initial = isInitialPlacement(parent);
    if (initial === false && reverts) {
      if (_copy) {
        if (parent) {
          parent.removeChild(_copy);
        }
      } else {
        _source.insertBefore(item, _initialSibling);
      }
    }
    if (initial || reverts) {
      drake.emit('cancel', item, _source, _source);
    } else {
      drake.emit('drop', item, parent, _source, _currentSibling);
    }
    cleanup();
  }

  function cleanup () {
    var item = _copy || _item;
    ungrab();
    removeMirrorImage();
    if (item) {
      classes.rm(item, 'gu-transit');
    }
    if (_renderTimer) {
      clearTimeout(_renderTimer);
    }
    drake.dragging = false;
    if (_lastDropTarget) {
      drake.emit('out', item, _lastDropTarget, _source);
    }
    drake.emit('dragend', item);
    _source = _item = _copy = _initialSibling = _currentSibling = _renderTimer = _lastDropTarget = null;
  }

  function isInitialPlacement (target, s) {
    var sibling;
    if (s !== void 0) {
      sibling = s;
    } else if (_mirror) {
      sibling = _currentSibling;
    } else {
      sibling = nextEl(_copy || _item);
    }
    return target === _source && sibling === _initialSibling;
  }

  function findDropTarget (elementBehindCursor, clientX, clientY) {
    var target = elementBehindCursor;
    while (target && !accepted()) {
      target = getParent(target);
    }
    return target;

    function accepted () {
      var droppable = isContainer(target);
      if (droppable === false) {
        return false;
      }

      var immediate = getImmediateChild(target, elementBehindCursor);
      var reference = getReference(target, immediate, clientX, clientY);
      var initial = isInitialPlacement(target, reference);
      if (initial) {
        return true; // should always be able to drop it right back where it was
      }
      return o.accepts(_item, target, _source, reference);
    }
  }

  function drag (e) {
    if (!_mirror) {
      return;
    }
    e.preventDefault();

    var clientX = getCoord('clientX', e);
    var clientY = getCoord('clientY', e);
    var x = clientX - _offsetX;
    var y = clientY - _offsetY;

    _mirror.style.left = x + 'px';
    _mirror.style.top = y + 'px';

    var item = _copy || _item;
    var elementBehindCursor = getElementBehindPoint(_mirror, clientX, clientY);
    var dropTarget = findDropTarget(elementBehindCursor, clientX, clientY);
    var changed = dropTarget !== null && dropTarget !== _lastDropTarget;
    if (changed || dropTarget === null) {
      out();
      _lastDropTarget = dropTarget;
      over();
    }
    var parent = getParent(item);
    if (dropTarget === _source && _copy && !o.copySortSource) {
      if (parent) {
        parent.removeChild(item);
      }
      return;
    }
    var reference;
    var immediate = getImmediateChild(dropTarget, elementBehindCursor);
    if (immediate !== null) {
      reference = getReference(dropTarget, immediate, clientX, clientY);
    } else if (o.revertOnSpill === true && !_copy) {
      reference = _initialSibling;
      dropTarget = _source;
    } else {
      if (_copy && parent) {
        parent.removeChild(item);
      }
      return;
    }
    if (
      (reference === null && changed) ||
      reference !== item &&
      reference !== nextEl(item)
    ) {
      _currentSibling = reference;
      dropTarget.insertBefore(item, reference);
      drake.emit('shadow', item, dropTarget, _source);
    }
    function moved (type) { drake.emit(type, item, _lastDropTarget, _source); }
    function over () { if (changed) { moved('over'); } }
    function out () { if (_lastDropTarget) { moved('out'); } }
  }

  function spillOver (el) {
    classes.rm(el, 'gu-hide');
  }

  function spillOut (el) {
    if (drake.dragging) { classes.add(el, 'gu-hide'); }
  }

  function renderMirrorImage () {
    if (_mirror) {
      return;
    }
    var rect = _item.getBoundingClientRect();
    _mirror = _item.cloneNode(true);
    _mirror.style.width = getRectWidth(rect) + 'px';
    _mirror.style.height = getRectHeight(rect) + 'px';
    classes.rm(_mirror, 'gu-transit');
    classes.add(_mirror, 'gu-mirror');
    o.mirrorContainer.appendChild(_mirror);
    touchy(documentElement, 'add', 'mousemove', drag);
    classes.add(o.mirrorContainer, 'gu-unselectable');
    drake.emit('cloned', _mirror, _item, 'mirror');
  }

  function removeMirrorImage () {
    if (_mirror) {
      classes.rm(o.mirrorContainer, 'gu-unselectable');
      touchy(documentElement, 'remove', 'mousemove', drag);
      getParent(_mirror).removeChild(_mirror);
      _mirror = null;
    }
  }

  function getImmediateChild (dropTarget, target) {
    var immediate = target;
    while (immediate !== dropTarget && getParent(immediate) !== dropTarget) {
      immediate = getParent(immediate);
    }
    if (immediate === documentElement) {
      return null;
    }
    return immediate;
  }

  function getReference (dropTarget, target, x, y) {
    var horizontal = o.direction === 'horizontal';
    var reference = target !== dropTarget ? inside() : outside();
    return reference;

    function outside () { // slower, but able to figure out any position
      var len = dropTarget.children.length;
      var i;
      var el;
      var rect;
      for (i = 0; i < len; i++) {
        el = dropTarget.children[i];
        rect = el.getBoundingClientRect();
        if (horizontal && (rect.left + rect.width / 2) > x) { return el; }
        if (!horizontal && (rect.top + rect.height / 2) > y) { return el; }
      }
      return null;
    }

    function inside () { // faster, but only available if dropped inside a child element
      var rect = target.getBoundingClientRect();
      if (horizontal) {
        return resolve(x > rect.left + getRectWidth(rect) / 2);
      }
      return resolve(y > rect.top + getRectHeight(rect) / 2);
    }

    function resolve (after) {
      return after ? nextEl(target) : target;
    }
  }

  function isCopy (item, container) {
    return typeof o.copy === 'boolean' ? o.copy : o.copy(item, container);
  }
}

function touchy (el, op, type, fn) {
  var touch = {
    mouseup: 'touchend',
    mousedown: 'touchstart',
    mousemove: 'touchmove'
  };
  var pointers = {
    mouseup: 'pointerup',
    mousedown: 'pointerdown',
    mousemove: 'pointermove'
  };
  var microsoft = {
    mouseup: 'MSPointerUp',
    mousedown: 'MSPointerDown',
    mousemove: 'MSPointerMove'
  };
  if (global.navigator.pointerEnabled) {
    crossvent[op](el, pointers[type], fn);
  } else if (global.navigator.msPointerEnabled) {
    crossvent[op](el, microsoft[type], fn);
  } else {
    crossvent[op](el, touch[type], fn);
    crossvent[op](el, type, fn);
  }
}

function whichMouseButton (e) {
  if (e.touches !== void 0) { return e.touches.length; }
  if (e.which !== void 0 && e.which !== 0) { return e.which; } // see https://github.com/bevacqua/dragula/issues/261
  if (e.buttons !== void 0) { return e.buttons; }
  var button = e.button;
  if (button !== void 0) { // see https://github.com/jquery/jquery/blob/99e8ff1baa7ae341e94bb89c3e84570c7c3ad9ea/src/event.js#L573-L575
    return button & 1 ? 1 : button & 2 ? 3 : (button & 4 ? 2 : 0);
  }
}

function getOffset (el) {
  var rect = el.getBoundingClientRect();
  return {
    left: rect.left + getScroll('scrollLeft', 'pageXOffset'),
    top: rect.top + getScroll('scrollTop', 'pageYOffset')
  };
}

function getScroll (scrollProp, offsetProp) {
  if (typeof global[offsetProp] !== 'undefined') {
    return global[offsetProp];
  }
  if (documentElement.clientHeight) {
    return documentElement[scrollProp];
  }
  return doc.body[scrollProp];
}

function getElementBehindPoint (point, x, y) {
  var p = point || {};
  var state = p.className;
  var el;
  p.className += ' gu-hide';
  el = doc.elementFromPoint(x, y);
  p.className = state;
  return el;
}

function never () { return false; }
function always () { return true; }
function getRectWidth (rect) { return rect.width || (rect.right - rect.left); }
function getRectHeight (rect) { return rect.height || (rect.bottom - rect.top); }
function getParent (el) { return el.parentNode === doc ? null : el.parentNode; }
function isInput (el) { return el.tagName === 'INPUT' || el.tagName === 'TEXTAREA' || el.tagName === 'SELECT' || isEditable(el); }
function isEditable (el) {
  if (!el) { return false; } // no parents were editable
  if (el.contentEditable === 'false') { return false; } // stop the lookup
  if (el.contentEditable === 'true') { return true; } // found a contentEditable element in the chain
  return isEditable(getParent(el)); // contentEditable is set to 'inherit'
}

function nextEl (el) {
  return el.nextElementSibling || manually();
  function manually () {
    var sibling = el;
    do {
      sibling = sibling.nextSibling;
    } while (sibling && sibling.nodeType !== 1);
    return sibling;
  }
}

function getEventHost (e) {
  // on touchend event, we have to use `e.changedTouches`
  // see http://stackoverflow.com/questions/7192563/touchend-event-properties
  // see https://github.com/bevacqua/dragula/issues/34
  if (e.targetTouches && e.targetTouches.length) {
    return e.targetTouches[0];
  }
  if (e.changedTouches && e.changedTouches.length) {
    return e.changedTouches[0];
  }
  return e;
}

function getCoord (coord, e) {
  var host = getEventHost(e);
  var missMap = {
    pageX: 'clientX', // IE8
    pageY: 'clientY' // IE8
  };
  if (coord in missMap && !(coord in host) && missMap[coord] in host) {
    coord = missMap[coord];
  }
  return host[coord];
}

module.exports = dragula;

}).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
},{"./classes":8,"contra/emitter":4,"crossvent":5}],10:[function(require,module,exports){
// shim for using process in browser
var process = module.exports = {};

// cached from whatever global is present so that test runners that stub it
// don't break things.  But we need to wrap it in a try catch in case it is
// wrapped in strict mode code which doesn't define any globals.  It's inside a
// function because try/catches deoptimize in certain engines.

var cachedSetTimeout;
var cachedClearTimeout;

function defaultSetTimout() {
    throw new Error('setTimeout has not been defined');
}
function defaultClearTimeout () {
    throw new Error('clearTimeout has not been defined');
}
(function () {
    try {
        if (typeof setTimeout === 'function') {
            cachedSetTimeout = setTimeout;
        } else {
            cachedSetTimeout = defaultSetTimout;
        }
    } catch (e) {
        cachedSetTimeout = defaultSetTimout;
    }
    try {
        if (typeof clearTimeout === 'function') {
            cachedClearTimeout = clearTimeout;
        } else {
            cachedClearTimeout = defaultClearTimeout;
        }
    } catch (e) {
        cachedClearTimeout = defaultClearTimeout;
    }
} ())
function runTimeout(fun) {
    if (cachedSetTimeout === setTimeout) {
        //normal enviroments in sane situations
        return setTimeout(fun, 0);
    }
    // if setTimeout wasn't available but was latter defined
    if ((cachedSetTimeout === defaultSetTimout || !cachedSetTimeout) && setTimeout) {
        cachedSetTimeout = setTimeout;
        return setTimeout(fun, 0);
    }
    try {
        // when when somebody has screwed with setTimeout but no I.E. maddness
        return cachedSetTimeout(fun, 0);
    } catch(e){
        try {
            // When we are in I.E. but the script has been evaled so I.E. doesn't trust the global object when called normally
            return cachedSetTimeout.call(null, fun, 0);
        } catch(e){
            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error
            return cachedSetTimeout.call(this, fun, 0);
        }
    }


}
function runClearTimeout(marker) {
    if (cachedClearTimeout === clearTimeout) {
        //normal enviroments in sane situations
        return clearTimeout(marker);
    }
    // if clearTimeout wasn't available but was latter defined
    if ((cachedClearTimeout === defaultClearTimeout || !cachedClearTimeout) && clearTimeout) {
        cachedClearTimeout = clearTimeout;
        return clearTimeout(marker);
    }
    try {
        // when when somebody has screwed with setTimeout but no I.E. maddness
        return cachedClearTimeout(marker);
    } catch (e){
        try {
            // When we are in I.E. but the script has been evaled so I.E. doesn't  trust the global object when called normally
            return cachedClearTimeout.call(null, marker);
        } catch (e){
            // same as above but when it's a version of I.E. that must have the global object for 'this', hopfully our context correct otherwise it will throw a global error.
            // Some versions of I.E. have different rules for clearTimeout vs setTimeout
            return cachedClearTimeout.call(this, marker);
        }
    }



}
var queue = [];
var draining = false;
var currentQueue;
var queueIndex = -1;

function cleanUpNextTick() {
    if (!draining || !currentQueue) {
        return;
    }
    draining = false;
    if (currentQueue.length) {
        queue = currentQueue.concat(queue);
    } else {
        queueIndex = -1;
    }
    if (queue.length) {
        drainQueue();
    }
}

function drainQueue() {
    if (draining) {
        return;
    }
    var timeout = runTimeout(cleanUpNextTick);
    draining = true;

    var len = queue.length;
    while(len) {
        currentQueue = queue;
        queue = [];
        while (++queueIndex < len) {
            if (currentQueue) {
                currentQueue[queueIndex].run();
            }
        }
        queueIndex = -1;
        len = queue.length;
    }
    currentQueue = null;
    draining = false;
    runClearTimeout(timeout);
}

process.nextTick = function (fun) {
    var args = new Array(arguments.length - 1);
    if (arguments.length > 1) {
        for (var i = 1; i < arguments.length; i++) {
            args[i - 1] = arguments[i];
        }
    }
    queue.push(new Item(fun, args));
    if (queue.length === 1 && !draining) {
        runTimeout(drainQueue);
    }
};

// v8 likes predictible objects
function Item(fun, array) {
    this.fun = fun;
    this.array = array;
}
Item.prototype.run = function () {
    this.fun.apply(null, this.array);
};
process.title = 'browser';
process.browser = true;
process.env = {};
process.argv = [];
process.version = ''; // empty string to avoid regexp issues
process.versions = {};

function noop() {}

process.on = noop;
process.addListener = noop;
process.once = noop;
process.off = noop;
process.removeListener = noop;
process.removeAllListeners = noop;
process.emit = noop;
process.prependListener = noop;
process.prependOnceListener = noop;

process.listeners = function (name) { return [] }

process.binding = function (name) {
    throw new Error('process.binding is not supported');
};

process.cwd = function () { return '/' };
process.chdir = function (dir) {
    throw new Error('process.chdir is not supported');
};
process.umask = function() { return 0; };

},{}],11:[function(require,module,exports){
(function (setImmediate){
var si = typeof setImmediate === 'function', tick;
if (si) {
  tick = function (fn) { setImmediate(fn); };
} else {
  tick = function (fn) { setTimeout(fn, 0); };
}

module.exports = tick;
}).call(this,require("timers").setImmediate)
},{"timers":12}],12:[function(require,module,exports){
(function (setImmediate,clearImmediate){
var nextTick = require('process/browser.js').nextTick;
var apply = Function.prototype.apply;
var slice = Array.prototype.slice;
var immediateIds = {};
var nextImmediateId = 0;

// DOM APIs, for completeness

exports.setTimeout = function() {
  return new Timeout(apply.call(setTimeout, window, arguments), clearTimeout);
};
exports.setInterval = function() {
  return new Timeout(apply.call(setInterval, window, arguments), clearInterval);
};
exports.clearTimeout =
exports.clearInterval = function(timeout) { timeout.close(); };

function Timeout(id, clearFn) {
  this._id = id;
  this._clearFn = clearFn;
}
Timeout.prototype.unref = Timeout.prototype.ref = function() {};
Timeout.prototype.close = function() {
  this._clearFn.call(window, this._id);
};

// Does not start the time, just sets up the members needed.
exports.enroll = function(item, msecs) {
  clearTimeout(item._idleTimeoutId);
  item._idleTimeout = msecs;
};

exports.unenroll = function(item) {
  clearTimeout(item._idleTimeoutId);
  item._idleTimeout = -1;
};

exports._unrefActive = exports.active = function(item) {
  clearTimeout(item._idleTimeoutId);

  var msecs = item._idleTimeout;
  if (msecs >= 0) {
    item._idleTimeoutId = setTimeout(function onTimeout() {
      if (item._onTimeout)
        item._onTimeout();
    }, msecs);
  }
};

// That's not how node.js implements it but the exposed api is the same.
exports.setImmediate = typeof setImmediate === "function" ? setImmediate : function(fn) {
  var id = nextImmediateId++;
  var args = arguments.length < 2 ? false : slice.call(arguments, 1);

  immediateIds[id] = true;

  nextTick(function onNextTick() {
    if (immediateIds[id]) {
      // fn.call() is faster so we optimize for the common use-case
      // @see http://jsperf.com/call-apply-segu
      if (args) {
        fn.apply(null, args);
      } else {
        fn.call(null);
      }
      // Prevent ids from leaking
      exports.clearImmediate(id);
    }
  });

  return id;
};

exports.clearImmediate = typeof clearImmediate === "function" ? clearImmediate : function(id) {
  delete immediateIds[id];
};
}).call(this,require("timers").setImmediate,require("timers").clearImmediate)
},{"process/browser.js":10,"timers":12}]},{},[1]);