Merge pull request #360 from liln/master

Upgrade gridster.js to v0.5.1

2 files changed, 2 insertions, 3263 deletions

diff --git a/templates/project/assets/javascripts/gridster/jquery.gridster.js b/templates/project/assets/javascripts/gridster/jquery.gridster.js
deleted file mode 100644
index 9451c9a..0000000
--- a/templates/project/assets/javascripts/gridster/jquery.gridster.js
+++ /dev/null
@@ -1,3263 +0,0 @@
-/*! gridster.js - v0.1.0 - 2013-02-15
-* http://gridster.net/
-* Copyright (c) 2013 ducksboard; Licensed MIT */
-
-;(function($, window, document, undefined){
-    /**
-    * Creates objects with coordinates (x1, y1, x2, y2, cx, cy, width, height)
-    * to simulate DOM elements on the screen.
-    * Coords is used by Gridster to create a faux grid with any DOM element can
-    * collide.
-    *
-    * @class Coords
-    * @param {HTMLElement|Object} obj The jQuery HTMLElement or a object with: left,
-    * top, width and height properties.
-    * @return {Object} Coords instance.
-    * @constructor
-    */
-    function Coords(obj) {
-        if (obj[0] && $.isPlainObject(obj[0])) {
-            this.data = obj[0];
-        }else {
-            this.el = obj;
-        }
-
-        this.isCoords = true;
-        this.coords = {};
-        this.init();
-        return this;
-    }
-
-
-    var fn = Coords.prototype;
-
-
-    fn.init = function(){
-        this.set();
-        this.original_coords = this.get();
-    };
-
-
-    fn.set = function(update, not_update_offsets) {
-        var el = this.el;
-
-        if (el && !update) {
-            this.data = el.offset();
-            this.data.width = el.width();
-            this.data.height = el.height();
-        }
-
-        if (el && update && !not_update_offsets) {
-            var offset = el.offset();
-            this.data.top = offset.top;
-            this.data.left = offset.left;
-        }
-
-        var d = this.data;
-
-        this.coords.x1 = d.left;
-        this.coords.y1 = d.top;
-        this.coords.x2 = d.left + d.width;
-        this.coords.y2 = d.top + d.height;
-        this.coords.cx = d.left + (d.width / 2);
-        this.coords.cy = d.top + (d.height / 2);
-        this.coords.width  = d.width;
-        this.coords.height = d.height;
-        this.coords.el  = el || false ;
-
-        return this;
-    };
-
-
-    fn.update = function(data){
-        if (!data && !this.el) {
-            return this;
-        }
-
-        if (data) {
-            var new_data = $.extend({}, this.data, data);
-            this.data = new_data;
-            return this.set(true, true);
-        }
-
-        this.set(true);
-        return this;
-    };
-
-
-    fn.get = function(){
-        return this.coords;
-    };
-
-
-    //jQuery adapter
-    $.fn.coords = function() {
-        if (this.data('coords') ) {
-            return this.data('coords');
-        }
-
-        var ins = new Coords(this, arguments[0]);
-        this.data('coords', ins);
-        return ins;
-    };
-
-}(jQuery, window, document));
-
-;(function($, window, document, undefined){
-
-    var defaults = {
-        colliders_context: document.body
-        // ,on_overlap: function(collider_data){},
-        // on_overlap_start : function(collider_data){},
-        // on_overlap_stop : function(collider_data){}
-    };
-
-
-    /**
-    * Detects collisions between a DOM element against other DOM elements or
-    * Coords objects.
-    *
-    * @class Collision
-    * @uses Coords
-    * @param {HTMLElement} el The jQuery wrapped HTMLElement.
-    * @param {HTMLElement|Array} colliders Can be a jQuery collection
-    *  of HTMLElements or an Array of Coords instances.
-    * @param {Object} [options] An Object with all options you want to
-    *        overwrite:
-    *   @param {Function} [options.on_overlap_start] Executes a function the first
-    *    time each `collider ` is overlapped.
-    *   @param {Function} [options.on_overlap_stop] Executes a function when a
-    *    `collider` is no longer collided.
-    *   @param {Function} [options.on_overlap] Executes a function when the
-    * mouse is moved during the collision.
-    * @return {Object} Collision instance.
-    * @constructor
-    */
-    function Collision(el, colliders, options) {
-        this.options = $.extend(defaults, options);
-        this.$element = el;
-        this.last_colliders = [];
-        this.last_colliders_coords = [];
-        if (typeof colliders === 'string' || colliders instanceof jQuery) {
-            this.$colliders = $(colliders,
-                 this.options.colliders_context).not(this.$element);
-        }else{
-            this.colliders = $(colliders);
-        }
-
-        this.init();
-    }
-
-
-    var fn = Collision.prototype;
-
-
-    fn.init = function() {
-        this.find_collisions();
-    };
-
-
-    fn.overlaps = function(a, b) {
-        var x = false;
-        var y = false;
-
-        if ((b.x1 >= a.x1 && b.x1 <= a.x2) ||
-            (b.x2 >= a.x1 && b.x2 <= a.x2) ||
-            (a.x1 >= b.x1 && a.x2 <= b.x2)
-        ) { x = true; }
-
-        if ((b.y1 >= a.y1 && b.y1 <= a.y2) ||
-            (b.y2 >= a.y1 && b.y2 <= a.y2) ||
-            (a.y1 >= b.y1 && a.y2 <= b.y2)
-        ) { y = true; }
-
-        return (x && y);
-    };
-
-
-    fn.detect_overlapping_region = function(a, b){
-        var regionX = '';
-        var regionY = '';
-
-        if (a.y1 > b.cy && a.y1 < b.y2) { regionX = 'N'; }
-        if (a.y2 > b.y1 && a.y2 < b.cy) { regionX = 'S'; }
-        if (a.x1 > b.cx && a.x1 < b.x2) { regionY = 'W'; }
-        if (a.x2 > b.x1 && a.x2 < b.cx) { regionY = 'E'; }
-
-        return (regionX + regionY) || 'C';
-    };
-
-
-    fn.calculate_overlapped_area_coords = function(a, b){
-        var x1 = Math.max(a.x1, b.x1);
-        var y1 = Math.max(a.y1, b.y1);
-        var x2 = Math.min(a.x2, b.x2);
-        var y2 = Math.min(a.y2, b.y2);
-
-        return $({
-            left: x1,
-            top: y1,
-             width : (x2 - x1),
-            height: (y2 - y1)
-          }).coords().get();
-    };
-
-
-    fn.calculate_overlapped_area = function(coords){
-        return (coords.width * coords.height);
-    };
-
-
-    fn.manage_colliders_start_stop = function(new_colliders_coords, start_callback, stop_callback){
-        var last = this.last_colliders_coords;
-
-        for (var i = 0, il = last.length; i < il; i++) {
-            if ($.inArray(last[i], new_colliders_coords) === -1) {
-                start_callback.call(this, last[i]);
-            }
-        }
-
-        for (var j = 0, jl = new_colliders_coords.length; j < jl; j++) {
-            if ($.inArray(new_colliders_coords[j], last) === -1) {
-                stop_callback.call(this, new_colliders_coords[j]);
-            }
-
-        }
-    };
-
-
-    fn.find_collisions = function(player_data_coords){
-        var self = this;
-        var colliders_coords = [];
-        var colliders_data = [];
-        var $colliders = (this.colliders || this.$colliders);
-        var count = $colliders.length;
-        var player_coords = self.$element.coords()
-                             .update(player_data_coords || false).get();
-
-        while(count--){
-          var $collider = self.$colliders ?
-                           $($colliders[count]) : $colliders[count];
-          var $collider_coords_ins = ($collider.isCoords) ?
-                  $collider : $collider.coords();
-          var collider_coords = $collider_coords_ins.get();
-          var overlaps = self.overlaps(player_coords, collider_coords);
-
-          if (!overlaps) {
-            continue;
-          }
-
-          var region = self.detect_overlapping_region(
-              player_coords, collider_coords);
-
-            //todo: make this an option
-            if (region === 'C'){
-                var area_coords = self.calculate_overlapped_area_coords(
-                    player_coords, collider_coords);
-                var area = self.calculate_overlapped_area(area_coords);
-                var collider_data = {
-                    area: area,
-                    area_coords : area_coords,
-                    region: region,
-                    coords: collider_coords,
-                    player_coords: player_coords,
-                    el: $collider
-                };
-
-                if (self.options.on_overlap) {
-                    self.options.on_overlap.call(this, collider_data);
-                }
-                colliders_coords.push($collider_coords_ins);
-                colliders_data.push(collider_data);
-            }
-        }
-
-        if (self.options.on_overlap_stop || self.options.on_overlap_start) {
-            this.manage_colliders_start_stop(colliders_coords,
-                self.options.on_overlap_stop, self.options.on_overlap_start);
-        }
-
-        this.last_colliders_coords = colliders_coords;
-
-        return colliders_data;
-    };
-
-
-    fn.get_closest_colliders = function(player_data_coords){
-        var colliders = this.find_collisions(player_data_coords);
-
-        colliders.sort(function(a, b) {
-            /* if colliders are being overlapped by the "C" (center) region,
-             * we have to set a lower index in the array to which they are placed
-             * above in the grid. */
-            if (a.region === 'C' && b.region === 'C') {
-                if (a.coords.y1 < b.coords.y1 || a.coords.x1 < b.coords.x1) {
-                    return - 1;
-                }else{
-                    return 1;
-                }
-            }
-
-            if (a.area < b.area) {
-                return 1;
-            }
-
-            return 1;
-        });
-        return colliders;
-    };
-
-
-    //jQuery adapter
-    $.fn.collision = function(collider, options) {
-          return new Collision( this, collider, options );
-    };
-
-
-}(jQuery, window, document));
-
-;(function(window, undefined) {
-    /* Debounce and throttle functions taken from underscore.js */
-    window.debounce = function(func, wait, immediate) {
-        var timeout;
-        return function() {
-          var context = this, args = arguments;
-          var later = function() {
-            timeout = null;
-            if (!immediate) func.apply(context, args);
-          };
-          if (immediate && !timeout) func.apply(context, args);
-          clearTimeout(timeout);
-          timeout = setTimeout(later, wait);
-        };
-    };
-
-
-    window.throttle = function(func, wait) {
-        var context, args, timeout, throttling, more, result;
-        var whenDone = debounce(
-            function(){ more = throttling = false; }, wait);
-        return function() {
-          context = this; args = arguments;
-          var later = function() {
-            timeout = null;
-            if (more) func.apply(context, args);
-            whenDone();
-          };
-          if (!timeout) timeout = setTimeout(later, wait);
-          if (throttling) {
-            more = true;
-          } else {
-            result = func.apply(context, args);
-          }
-          whenDone();
-          throttling = true;
-          return result;
-        };
-    };
-
-})(window);
-
-;(function($, window, document, undefined){
-
-    var defaults = {
-        items: '.gs_w',
-        distance: 1,
-        limit: true,
-        offset_left: 0,
-        autoscroll: true,
-        ignore_dragging: ['INPUT', 'TEXTAREA', 'SELECT', 'BUTTON'],
-        handle: null
-        // drag: function(e){},
-        // start : function(e, ui){},
-        // stop : function(e){}
-    };
-
-    var $window = $(window);
-    var isTouch = !!('ontouchstart' in window);
-    var pointer_events = {
-        start: isTouch ? 'touchstart' : 'mousedown.draggable',
-        move: isTouch ? 'touchmove' : 'mousemove.draggable',
-        end: isTouch ? 'touchend' : 'mouseup.draggable'
-    };
-
-    /**
-    * Basic drag implementation for DOM elements inside a container.
-    * Provide start/stop/drag callbacks.
-    *
-    * @class Draggable
-    * @param {HTMLElement} el The HTMLelement that contains all the widgets
-    *  to be dragged.
-    * @param {Object} [options] An Object with all options you want to
-    *        overwrite:
-    *    @param {HTMLElement|String} [options.items] Define who will
-    *     be the draggable items. Can be a CSS Selector String or a
-    *     collection of HTMLElements.
-    *    @param {Number} [options.distance] Distance in pixels after mousedown
-    *     the mouse must move before dragging should start.
-    *    @param {Boolean} [options.limit] Constrains dragging to the width of
-    *     the container
-    *    @param {offset_left} [options.offset_left] Offset added to the item
-    *     that is being dragged.
-    *    @param {Number} [options.drag] Executes a callback when the mouse is
-    *     moved during the dragging.
-    *    @param {Number} [options.start] Executes a callback when the drag
-    *     starts.
-    *    @param {Number} [options.stop] Executes a callback when the drag stops.
-    * @return {Object} Returns `el`.
-    * @constructor
-    */
-    function Draggable(el, options) {
-      this.options = $.extend({}, defaults, options);
-      this.$body = $(document.body);
-      this.$container = $(el);
-      this.$dragitems = $(this.options.items, this.$container);
-      this.is_dragging = false;
-      this.player_min_left = 0 + this.options.offset_left;
-      this.init();
-    }
-
-    var fn = Draggable.prototype;
-
-    fn.init = function() {
-        this.calculate_positions();
-        this.$container.css('position', 'relative');
-        this.disabled = false;
-        this.events();
-
-        this.on_window_resize = throttle($.proxy(this.calculate_positions, this), 200);
-        $(window).bind('resize', this.on_window_resize);
-    };
-
-    fn.events = function() {
-        this.proxied_on_select_start = $.proxy(this.on_select_start, this);
-        this.$container.on('selectstart', this.proxied_on_select_start);
-
-        this.proxied_drag_handler = $.proxy(this.drag_handler, this);
-        this.$container.on(pointer_events.start, this.options.items, this.proxied_drag_handler);
-
-        this.proxied_pointer_events_end = $.proxy(function(e) {
-            this.is_dragging = false;
-            if (this.disabled) { return; }
-            this.$body.off(pointer_events.move);
-            if (this.drag_start) {
-                this.on_dragstop(e);
-            }
-        }, this);
-        this.$body.on(pointer_events.end, this.proxied_pointer_events_end);
-    };
-
-    fn.get_actual_pos = function($el) {
-        var pos = $el.position();
-        return pos;
-    };
-
-
-    fn.get_mouse_pos = function(e) {
-        if (isTouch) {
-            var oe = e.originalEvent;
-            e = oe.touches.length ? oe.touches[0] : oe.changedTouches[0];
-        }
-
-        return {
-            left: e.clientX,
-            top: e.clientY
-        };
-    };
-
-
-    fn.get_offset = function(e) {
-        e.preventDefault();
-        var mouse_actual_pos = this.get_mouse_pos(e);
-        var diff_x = Math.round(
-            mouse_actual_pos.left - this.mouse_init_pos.left);
-        var diff_y = Math.round(mouse_actual_pos.top - this.mouse_init_pos.top);
-
-        var left = Math.round(this.el_init_offset.left + diff_x - this.baseX);
-        var top = Math.round(
-            this.el_init_offset.top + diff_y - this.baseY + this.scrollOffset);
-
-        if (this.options.limit) {
-            if (left > this.player_max_left) {
-                left = this.player_max_left;
-            }else if(left < this.player_min_left) {
-                left = this.player_min_left;
-            }
-        }
-
-        return {
-            left: left,
-            top: top,
-            mouse_left: mouse_actual_pos.left,
-            mouse_top: mouse_actual_pos.top
-        };
-    };
-
-
-    fn.manage_scroll = function(offset) {
-        /* scroll document */
-        var nextScrollTop;
-        var scrollTop = $window.scrollTop();
-        var min_window_y = scrollTop;
-        var max_window_y = min_window_y + this.window_height;
-
-        var mouse_down_zone = max_window_y - 50;
-        var mouse_up_zone = min_window_y + 50;
-
-        var abs_mouse_left = offset.mouse_left;
-        var abs_mouse_top = min_window_y + offset.mouse_top;
-
-        var max_player_y = (this.doc_height - this.window_height +
-            this.player_height);
-
-        if (abs_mouse_top >= mouse_down_zone) {
-            nextScrollTop = scrollTop + 30;
-            if (nextScrollTop < max_player_y) {
-                $window.scrollTop(nextScrollTop);
-                this.scrollOffset = this.scrollOffset + 30;
-            }
-        }
-
-        if (abs_mouse_top <= mouse_up_zone) {
-            nextScrollTop = scrollTop - 30;
-            if (nextScrollTop > 0) {
-                $window.scrollTop(nextScrollTop);
-                this.scrollOffset = this.scrollOffset - 30;
-            }
-        }
-    };
-
-
-    fn.calculate_positions = function(e) {
-        this.window_height = $window.height();
-    };
-
-
-    fn.drag_handler = function(e) {
-        var node = e.target.nodeName;
-        if (this.disabled || e.which !== 1 && !isTouch) {
-            return;
-        }
-
-        if (this.ignore_drag(e)) {
-            return;
-        }
-
-        var self = this;
-        var first = true;
-        this.$player = $(e.currentTarget);
-
-        this.el_init_pos = this.get_actual_pos(this.$player);
-        this.mouse_init_pos = this.get_mouse_pos(e);
-        this.offsetY = this.mouse_init_pos.top - this.el_init_pos.top;
-
-        this.on_pointer_events_move = function(mme){
-            var mouse_actual_pos = self.get_mouse_pos(mme);
-            var diff_x = Math.abs(
-                mouse_actual_pos.left - self.mouse_init_pos.left);
-            var diff_y = Math.abs(
-                mouse_actual_pos.top - self.mouse_init_pos.top);
-            if (!(diff_x > self.options.distance ||
-                diff_y > self.options.distance)
-                ) {
-                return false;
-            }
-
-            if (first) {
-                first = false;
-                self.on_dragstart.call(self, mme);
-                return false;
-            }
-
-            if (self.is_dragging === true) {
-                self.on_dragmove.call(self, mme);
-            }
-
-            return false;
-        };
-
-        this.$body.on(pointer_events.move, this.on_pointer_events_move);
-
-        return false;
-    };
-
-
-    fn.on_dragstart = function(e) {
-        e.preventDefault();
-        this.drag_start = true;
-        this.is_dragging = true;
-        var offset = this.$container.offset();
-        this.baseX = Math.round(offset.left);
-        this.baseY = Math.round(offset.top);
-        this.doc_height = $(document).height();
-
-        if (this.options.helper === 'clone') {
-            this.$helper = this.$player.clone()
-                .appendTo(this.$container).addClass('helper');
-            this.helper = true;
-        }else{
-            this.helper = false;
-        }
-        this.scrollOffset = 0;
-        this.el_init_offset = this.$player.offset();
-        this.player_width = this.$player.width();
-        this.player_height = this.$player.height();
-        this.player_max_left = (this.$container.width() - this.player_width +
-            this.options.offset_left);
-
-        if (this.options.start) {
-            this.options.start.call(this.$player, e, {
-                helper: this.helper ? this.$helper : this.$player
-            });
-        }
-        return false;
-    };
-
-
-    fn.on_dragmove = function(e) {
-        var offset = this.get_offset(e);
-
-        this.options.autoscroll && this.manage_scroll(offset);
-
-        (this.helper ? this.$helper : this.$player).css({
-            'position': 'absolute',
-            'left' : offset.left,
-            'top' : offset.top
-        });
-
-        var ui = {
-            'position': {
-                'left': offset.left,
-                'top': offset.top
-            }
-        };
-
-        if (this.options.drag) {
-            this.options.drag.call(this.$player, e, ui);
-        }
-        return false;
-    };
-
-
-    fn.on_dragstop = function(e) {
-        var offset = this.get_offset(e);
-        this.drag_start = false;
-
-        var ui = {
-            'position': {
-                'left': offset.left,
-                'top': offset.top
-            }
-        };
-
-        if (this.options.stop) {
-            this.options.stop.call(this.$player, e, ui);
-        }
-
-        if (this.helper) {
-            this.$helper.remove();
-        }
-
-        return false;
-    };
-
-    fn.on_select_start = function(e) {
-        if (this.disabled) { return; }
-
-        if (this.ignore_drag(e)) {
-            return;
-        }
-
-        return false;
-    };
-
-    fn.enable = function() {
-        this.disabled = false;
-    };
-
-    fn.disable = function() {
-        this.disabled = true;
-    };
-
-
-    fn.destroy = function(){
-        this.disable();
-
-        this.$container.off('selectstart', this.proxied_on_select_start);
-        this.$container.off(pointer_events.start, this.proxied_drag_handler);
-        this.$body.off(pointer_events.end, this.proxied_pointer_events_end);
-        this.$body.off(pointer_events.move, this.on_pointer_events_move);
-        $(window).unbind('resize', this.on_window_resize);
-
-        $.removeData(this.$container, 'drag');
-    };
-
-    fn.ignore_drag = function(event) {
-        if (this.options.handle) {
-            return !$(event.target).is(this.options.handle);
-        }
-
-        return $.inArray(event.target.nodeName, this.options.ignore_dragging) >= 0;
-    };
-
-    //jQuery adapter
-    $.fn.drag = function ( options ) {
-        return this.each(function () {
-            if (!$.data(this, 'drag')) {
-                $.data(this, 'drag', new Draggable( this, options ));
-            }
-        });
-    };
-
-
-}(jQuery, window, document));
-
-;(function($, window, document, undefined) {
-
-    var defaults = {
-        namespace: '',
-        widget_selector: 'li',
-        widget_margins: [10, 10],
-        widget_base_dimensions: [400, 225],
-        extra_rows: 0,
-        extra_cols: 0,
-        min_cols: 1,
-        min_rows: 15,
-        max_size_x: 6,
-        autogenerate_stylesheet: true,
-        avoid_overlapped_widgets: true,
-        serialize_params: function($w, wgd) {
-            return {
-                col: wgd.col,
-                row: wgd.row,
-                size_x: wgd.size_x,
-                size_y: wgd.size_y
-            };
-        },
-        collision: {},
-        draggable: {
-            distance: 4
-        }
-    };
-
-
-    /**
-    * @class Gridster
-    * @uses Draggable
-    * @uses Collision
-    * @param {HTMLElement} el The HTMLelement that contains all the widgets.
-    * @param {Object} [options] An Object with all options you want to
-    *        overwrite:
-    *    @param {HTMLElement|String} [options.widget_selector] Define who will
-    *     be the draggable widgets. Can be a CSS Selector String or a
-    *     collection of HTMLElements
-    *    @param {Array} [options.widget_margins] Margin between widgets.
-    *     The first index for the horizontal margin (left, right) and
-    *     the second for the vertical margin (top, bottom).
-    *    @param {Array} [options.widget_base_dimensions] Base widget dimensions
-    *     in pixels. The first index for the width and the second for the
-    *     height.
-    *    @param {Number} [options.extra_cols] Add more columns in addition to
-    *     those that have been calculated.
-    *    @param {Number} [options.extra_rows] Add more rows in addition to
-    *     those that have been calculated.
-    *    @param {Number} [options.min_cols] The minimum required columns.
-    *    @param {Number} [options.min_rows] The minimum required rows.
-    *    @param {Number} [options.max_size_x] The maximum number of columns
-    *     that a widget can span.
-    *    @param {Boolean} [options.autogenerate_stylesheet] If true, all the
-    *     CSS required to position all widgets in their respective columns
-    *     and rows will be generated automatically and injected to the
-    *     `<head>` of the document. You can set this to false, and write
-    *     your own CSS targeting rows and cols via data-attributes like so:
-    *     `[data-col="1"] { left: 10px; }`
-    *    @param {Boolean} [options.avoid_overlapped_widgets] Avoid that widgets loaded
-    *     from the DOM can be overlapped. It is helpful if the positions were
-    *     bad stored in the database or if there was any conflict.
-    *    @param {Function} [options.serialize_params] Return the data you want
-    *     for each widget in the serialization. Two arguments are passed:
-    *     `$w`: the jQuery wrapped HTMLElement, and `wgd`: the grid
-    *     coords object (`col`, `row`, `size_x`, `size_y`).
-    *    @param {Object} [options.collision] An Object with all options for
-    *     Collision class you want to overwrite. See Collision docs for
-    *     more info.
-    *    @param {Object} [options.draggable] An Object with all options for
-    *     Draggable class you want to overwrite. See Draggable docs for more
-    *     info.
-    *
-    * @constructor
-    */
-    function Gridster(el, options) {
-      this.options = $.extend(true, defaults, options);
-      this.$el = $(el);
-      this.$wrapper = this.$el.parent();
-      this.$widgets = this.$el.children(this.options.widget_selector).addClass('gs_w');
-      this.widgets = [];
-      this.$changed = $([]);
-      this.wrapper_width = this.$wrapper.width();
-      this.min_widget_width = (this.options.widget_margins[0] * 2) +
-        this.options.widget_base_dimensions[0];
-      this.min_widget_height = (this.options.widget_margins[1] * 2) +
-        this.options.widget_base_dimensions[1];
-      this.init();
-    }
-
-    Gridster.generated_stylesheets = [];
-
-    var fn = Gridster.prototype;
-
-    fn.init = function() {
-        this.generate_grid_and_stylesheet();
-        this.get_widgets_from_DOM();
-        this.set_dom_grid_height();
-        this.$wrapper.addClass('ready');
-        this.draggable();
-
-        this.on_window_resize = throttle($.proxy(this.recalculate_faux_grid, this), 200);
-
-        $(window).bind('resize', this.on_window_resize);
-    };
-
-
-    /**
-    * Disables dragging.
-    *
-    * @method disable
-    * @return {Class} Returns the instance of the Gridster Class.
-    */
-    fn.disable = function() {
-        this.$wrapper.find('.player-revert').removeClass('player-revert');
-        this.drag_api.disable();
-        return this;
-    };
-
-
-    /**
-    * Enables dragging.
-    *
-    * @method enable
-    * @return {Class} Returns the instance of the Gridster Class.
-    */
-    fn.enable = function() {
-        this.drag_api.enable();
-        return this;
-    };
-
-
-    /**
-    * Add a new widget to the grid.
-    *
-    * @method add_widget
-    * @param {String|HTMLElement} html The string representing the HTML of the widget
-    *  or the HTMLElement.
-    * @param {Number} [size_x] The nº of rows the widget occupies horizontally.
-    * @param {Number} [size_y] The nº of columns the widget occupies vertically.
-    * @param {Number} [col] The column the widget should start in.
-    * @param {Number} [row] The row the widget should start in.
-    * @return {HTMLElement} Returns the jQuery wrapped HTMLElement representing.
-    *  the widget that was just created.
-    */
-    fn.add_widget = function(html, size_x, size_y, col, row) {
-        var pos;
-        size_x || (size_x = 1);
-        size_y || (size_y = 1);
-
-        if (!col & !row) {
-            pos = this.next_position(size_x, size_y);
-        }else{
-            pos = {
-                col: col,
-                row: row
-            };
-
-            this.empty_cells(col, row, size_x, size_y);
-        }
-
-        var $w = $(html).attr({
-                'data-col': pos.col,
-                'data-row': pos.row,
-                'data-sizex' : size_x,
-                'data-sizey' : size_y
-            }).addClass('gs_w').appendTo(this.$el).hide();
-
-        this.$widgets = this.$widgets.add($w);
-
-        this.register_widget($w);
-
-        this.add_faux_rows(pos.size_y);
-        //this.add_faux_cols(pos.size_x);
-
-        this.set_dom_grid_height();
-
-        return $w.fadeIn();
-    };
-
-
-
-    /**
-    * Change the size of a widget.
-    *
-    * @method resize_widget
-    * @param {HTMLElement} $widget The jQuery wrapped HTMLElement
-    *  representing the widget.
-    * @param {Number} size_x The number of columns that will occupy the widget.
-    * @param {Number} size_y The number of rows that will occupy the widget.
-    * @return {HTMLElement} Returns $widget.
-    */
-    fn.resize_widget = function($widget, size_x, size_y) {
-        var wgd = $widget.coords().grid;
-        size_x || (size_x = wgd.size_x);
-        size_y || (size_y = wgd.size_y);
-
-        if (size_x > this.cols) {
-            size_x = this.cols;
-        }
-
-        var old_cells_occupied = this.get_cells_occupied(wgd);
-        var old_size_x = wgd.size_x;
-        var old_size_y = wgd.size_y;
-        var old_col = wgd.col;
-        var new_col = old_col;
-        var wider = size_x > old_size_x;
-        var taller = size_y > old_size_y;
-
-        if (old_col + size_x - 1 > this.cols) {
-            var diff = old_col + (size_x - 1) - this.cols;
-            var c = old_col - diff;
-            new_col = Math.max(1, c);
-        }
-
-        var new_grid_data = {
-            col: new_col,
-            row: wgd.row,
-            size_x: size_x,
-            size_y: size_y
-        };
-
-        var new_cells_occupied = this.get_cells_occupied(new_grid_data);
-
-        var empty_cols = [];
-        $.each(old_cells_occupied.cols, function(i, col) {
-            if ($.inArray(col, new_cells_occupied.cols) === -1) {
-                empty_cols.push(col);
-            }
-        });
-
-        var occupied_cols = [];
-        $.each(new_cells_occupied.cols, function(i, col) {
-            if ($.inArray(col, old_cells_occupied.cols) === -1) {
-                occupied_cols.push(col);
-            }
-        });
-
-        var empty_rows = [];
-        $.each(old_cells_occupied.rows, function(i, row) {
-            if ($.inArray(row, new_cells_occupied.rows) === -1) {
-                empty_rows.push(row);
-            }
-        });
-
-        var occupied_rows = [];
-        $.each(new_cells_occupied.rows, function(i, row) {
-            if ($.inArray(row, old_cells_occupied.rows) === -1) {
-                occupied_rows.push(row);
-            }
-        });
-
-        this.remove_from_gridmap(wgd);
-
-        if (occupied_cols.length) {
-            var cols_to_empty = [
-                new_col, wgd.row, size_x, Math.min(old_size_y, size_y), $widget
-            ];
-            this.empty_cells.apply(this, cols_to_empty);
-        }
-
-        if (occupied_rows.length) {
-            var rows_to_empty = [new_col, wgd.row, size_x, size_y, $widget];
-            this.empty_cells.apply(this, rows_to_empty);
-        }
-
-        wgd.col = new_col;
-        wgd.size_x = size_x;
-        wgd.size_y = size_y;
-        this.add_to_gridmap(new_grid_data, $widget);
-
-        //update coords instance attributes
-        $widget.data('coords').update({
-            width: (size_x * this.options.widget_base_dimensions[0] +
-                ((size_x - 1) * this.options.widget_margins[0]) * 2),
-            height: (size_y * this.options.widget_base_dimensions[1] +
-                ((size_y - 1) * this.options.widget_margins[1]) * 2)
-        });
-
-        if (size_y > old_size_y) {
-            this.add_faux_rows(size_y - old_size_y);
-        }
-
-        if (size_x > old_size_x) {
-            this.add_faux_cols(size_x - old_size_x);
-        }
-
-        $widget.attr({
-            'data-col': new_col,
-            'data-sizex': size_x,
-            'data-sizey': size_y
-        });
-
-        if (empty_cols.length) {
-            var cols_to_remove_holes = [
-                empty_cols[0], wgd.row,
-                empty_cols.length,
-                Math.min(old_size_y, size_y),
-                $widget
-            ];
-
-            this.remove_empty_cells.apply(this, cols_to_remove_holes);
-        }
-
-        if (empty_rows.length) {
-            var rows_to_remove_holes = [
-                new_col, wgd.row, size_x, size_y, $widget
-            ];
-            this.remove_empty_cells.apply(this, rows_to_remove_holes);
-        }
-
-        return $widget;
-    };
-
-    /**
-    * Move down widgets in cells represented by the arguments col, row, size_x,
-    * size_y
-    *
-    * @method empty_cells
-    * @param {Number} col The column where the group of cells begin.
-    * @param {Number} row The row where the group of cells begin.
-    * @param {Number} size_x The number of columns that the group of cells
-    * occupy.
-    * @param {Number} size_y The number of rows that the group of cells
-    * occupy.
-    * @param {HTMLElement} $exclude Exclude widgets from being moved.
-    * @return {Class} Returns the instance of the Gridster Class.
-    */
-    fn.empty_cells = function(col, row, size_x, size_y, $exclude) {
-        var $nexts = this.widgets_below({
-                col: col,
-                row: row - size_y,
-                size_x: size_x,
-                size_y: size_y
-            });
-
-        $nexts.not($exclude).each($.proxy(function(i, w) {
-            var wgd = $(w).coords().grid;
-            if (!(wgd.row <= (row + size_y - 1))) { return; }
-            var diff =  (row + size_y) - wgd.row;
-            this.move_widget_down($(w), diff);
-        }, this));
-
-        this.set_dom_grid_height();
-
-        return this;
-    };
-
-
-    /**
-    * Move up widgets below cells represented by the arguments col, row, size_x,
-    * size_y.
-    *
-    * @method remove_empty_cells
-    * @param {Number} col The column where the group of cells begin.
-    * @param {Number} row The row where the group of cells begin.
-    * @param {Number} size_x The number of columns that the group of cells
-    * occupy.
-    * @param {Number} size_y The number of rows that the group of cells
-    * occupy.
-    * @param {HTMLElement} exclude Exclude widgets from being moved.
-    * @return {Class} Returns the instance of the Gridster Class.
-    */
-    fn.remove_empty_cells = function(col, row, size_x, size_y, exclude) {
-        var $nexts = this.widgets_below({
-            col: col,
-            row: row,
-            size_x: size_x,
-            size_y: size_y
-        });
-
-        $nexts.not(exclude).each($.proxy(function(i, widget) {
-            this.move_widget_up( $(widget), size_y );
-        }, this));
-
-        this.set_dom_grid_height();
-
-        return this;
-    };
-
-
-    /**
-    * Get the most left column below to add a new widget.
-    *
-    * @method next_position
-    * @param {Number} size_x The nº of rows the widget occupies horizontally.
-    * @param {Number} size_y The nº of columns the widget occupies vertically.
-    * @return {Object} Returns a grid coords object representing the future
-    *  widget coords.
-    */
-    fn.next_position = function(size_x, size_y) {
-        size_x || (size_x = 1);
-        size_y || (size_y = 1);
-        var ga = this.gridmap;
-        var cols_l = ga.length;
-        var valid_pos = [];
-        var rows_l;
-
-        for (var c = 1; c < cols_l; c++) {
-            rows_l = ga[c].length;
-            for (var r = 1; r <= rows_l; r++) {
-                var can_move_to = this.can_move_to({
-                    size_x: size_x,
-                    size_y: size_y
-                }, c, r);
-
-                if (can_move_to) {
-                    valid_pos.push({
-                        col: c,
-                        row: r,
-                        size_y: size_y,
-                        size_x: size_x
-                    });
-                }
-            }
-        }
-
-        if (valid_pos.length) {
-            return this.sort_by_row_and_col_asc(valid_pos)[0];
-        }
-        return false;
-    };
-
-
-    /**
-    * Remove a widget from the grid.
-    *
-    * @method remove_widget
-    * @param {HTMLElement} el The jQuery wrapped HTMLElement you want to remove.
-    * @param {Boolean|Function} silent If true, widgets below the removed one
-    * will not move up. If a Function is passed it will be used as callback.
-    * @param {Function} callback Function executed when the widget is removed.
-    * @return {Class} Returns the instance of the Gridster Class.
-    */
-    fn.remove_widget = function(el, silent, callback) {
-        var $el = el instanceof jQuery ? el : $(el);
-        var wgd = $el.coords().grid;
-
-        // if silent is a function assume it's a callback
-        if ($.isFunction(silent)) {
-            callback = silent;
-            silent = false;
-        }
-
-        this.cells_occupied_by_placeholder = {};
-        this.$widgets = this.$widgets.not($el);
-
-        var $nexts = this.widgets_below($el);
-
-        this.remove_from_gridmap(wgd);
-
-        $el.fadeOut($.proxy(function() {
-            $el.remove();
-
-            if (!silent) {
-                $nexts.each($.proxy(function(i, widget) {
-                    this.move_widget_up( $(widget), wgd.size_y );
-                }, this));
-            }
-
-            this.set_dom_grid_height();
-
-            if (callback) {
-                callback.call(this, el);
-            }
-        }, this));
-    };
-
-
-    /**
-    * Remove all widgets from the grid.
-    *
-    * @method remove_all_widgets
-    * @param {Function} callback Function executed for each widget removed.
-    * @return {Class} Returns the instance of the Gridster Class.
-    */
-    fn.remove_all_widgets = function(callback) {
-        this.$widgets.each($.proxy(function(i, el){
-              this.remove_widget(el, true, callback);
-        }, this));
-
-        return this;
-    };
-
-
-    /**
-    * Returns a serialized array of the widgets in the grid.
-    *
-    * @method serialize
-    * @param {HTMLElement} [$widgets] The collection of jQuery wrapped
-    *  HTMLElements you want to serialize. If no argument is passed all widgets
-    *  will be serialized.
-    * @return {Array} Returns an Array of Objects with the data specified in
-    *  the serialize_params option.
-    */
-    fn.serialize = function($widgets) {
-        $widgets || ($widgets = this.$widgets);
-        var result = [];
-        $widgets.each($.proxy(function(i, widget) {
-            result.push(this.options.serialize_params(
-                $(widget), $(widget).coords().grid ) );
-        }, this));
-
-        return result;
-    };
-
-
-    /**
-    * Returns a serialized array of the widgets that have changed their
-    *  position.
-    *
-    * @method serialize_changed
-    * @return {Array} Returns an Array of Objects with the data specified in
-    *  the serialize_params option.
-    */
-    fn.serialize_changed = function() {
-        return this.serialize(this.$changed);
-    };
-
-
-    /**
-    * Creates the grid coords object representing the widget a add it to the
-    * mapped array of positions.
-    *
-    * @method register_widget
-    * @return {Array} Returns the instance of the Gridster class.
-    */
-    fn.register_widget = function($el) {
-
-        var wgd = {
-            'col': parseInt($el.attr('data-col'), 10),
-            'row': parseInt($el.attr('data-row'), 10),
-            'size_x': parseInt($el.attr('data-sizex'), 10),
-            'size_y': parseInt($el.attr('data-sizey'), 10),
-            'el': $el
-        };
-
-        if (this.options.avoid_overlapped_widgets &&
-            !this.can_move_to(
-             {size_x: wgd.size_x, size_y: wgd.size_y}, wgd.col, wgd.row)
-        ) {
-            wgd = this.next_position(wgd.size_x, wgd.size_y);
-            wgd.el = $el;
-            $el.attr({
-                'data-col': wgd.col,
-                'data-row': wgd.row,
-                'data-sizex': wgd.size_x,
-                'data-sizey': wgd.size_y
-            });
-        }
-
-        // attach Coord object to player data-coord attribute
-        $el.data('coords', $el.coords());
-
-        // Extend Coord object with grid position info
-        $el.data('coords').grid = wgd;
-
-        this.add_to_gridmap(wgd, $el);
-
-        return this;
-    };
-
-
-    /**
-    * Update in the mapped array of positions the value of cells represented by
-    * the grid coords object passed in the `grid_data` param.
-    *
-    * @param {Object} grid_data The grid coords object representing the cells
-    *  to update in the mapped array.
-    * @param {HTMLElement|Boolean} value Pass `false` or the jQuery wrapped
-    *  HTMLElement, depends if you want to delete an existing position or add
-    *  a new one.
-    * @method update_widget_position
-    * @return {Class} Returns the instance of the Gridster Class.
-    */
-    fn.update_widget_position = function(grid_data, value) {
-        this.for_each_cell_occupied(grid_data, function(col, row) {
-            if (!this.gridmap[col]) { return this; }
-            this.gridmap[col][row] = value;
-        });
-        return this;
-    };
-
-
-    /**
-    * Remove a widget from the mapped array of positions.
-    *
-    * @method remove_from_gridmap
-    * @param {Object} grid_data The grid coords object representing the cells
-    *  to update in the mapped array.
-    * @return {Class} Returns the instance of the Gridster Class.
-    */
-    fn.remove_from_gridmap = function(grid_data) {
-        return this.update_widget_position(grid_data, false);
-    };
-
-
-    /**
-    * Add a widget to the mapped array of positions.
-    *
-    * @method add_to_gridmap
-    * @param {Object} grid_data The grid coords object representing the cells
-    *  to update in the mapped array.
-    * @param {HTMLElement|Boolean} value The value to set in the specified
-    *  position .
-    * @return {Class} Returns the instance of the Gridster Class.
-    */
-    fn.add_to_gridmap = function(grid_data, value) {
-        this.update_widget_position(grid_data, value || grid_data.el);
-
-        if (grid_data.el) {
-            var $widgets = this.widgets_below(grid_data.el);
-            $widgets.each($.proxy(function(i, widget) {
-                this.move_widget_up( $(widget));
-            }, this));
-        }
-    };
-
-
-    /**
-    * Make widgets draggable.
-    *
-    * @uses Draggable
-    * @method draggable
-    * @return {Class} Returns the instance of the Gridster Class.
-    */
-    fn.draggable = function() {
-        var self = this;
-        var draggable_options = $.extend(true, {}, this.options.draggable, {
-            offset_left: this.options.widget_margins[0],
-            start: function(event, ui) {
-                self.$widgets.filter('.player-revert')
-                    .removeClass('player-revert');
-
-                self.$player = $(this);
-                self.$helper = self.options.draggable.helper === 'clone' ?
-                    $(ui.helper) : self.$player;
-                self.helper = !self.$helper.is(self.$player);
-
-                self.on_start_drag.call(self, event, ui);
-                self.$el.trigger('gridster:dragstart');
-            },
-            stop: function(event, ui) {
-                self.on_stop_drag.call(self, event, ui);
-                self.$el.trigger('gridster:dragstop');
-            },
-            drag: throttle(function(event, ui) {
-                self.on_drag.call(self, event, ui);
-                self.$el.trigger('gridster:drag');
-            }, 60)
-          });
-
-        this.drag_api = this.$el.drag(draggable_options).data('drag');
-        return this;
-    };
-
-
-    /**
-    * This function is executed when the player begins to be dragged.
-    *
-    * @method on_start_drag
-    * @param {Event} event The original browser event
-    * @param {Object} ui A prepared ui object.
-    */
-    fn.on_start_drag = function(event, ui) {
-
-        this.$helper.add(this.$player).add(this.$wrapper).addClass('dragging');
-
-        this.$player.addClass('player');
-        this.player_grid_data = this.$player.coords().grid;
-        this.placeholder_grid_data = $.extend({}, this.player_grid_data);
-
-        //set new grid height along the dragging period
-        this.$el.css('height', this.$el.height() +
-          (this.player_grid_data.size_y * this.min_widget_height));
-
-        var colliders = this.faux_grid;
-        var coords = this.$player.data('coords').coords;
-
-        this.cells_occupied_by_player = this.get_cells_occupied(
-            this.player_grid_data);
-        this.cells_occupied_by_placeholder = this.get_cells_occupied(
-            this.placeholder_grid_data);
-
-        this.last_cols = [];
-        this.last_rows = [];
-
-
-        // see jquery.collision.js
-        this.collision_api = this.$helper.collision(
-            colliders, this.options.collision);
-
-        this.$preview_holder = $('<li />', {
-              'class': 'preview-holder',
-              'data-row': this.$player.attr('data-row'),
-              'data-col': this.$player.attr('data-col'),
-              css: {
-                  width: coords.width,
-                  height: coords.height
-              }
-        }).appendTo(this.$el);
-
-        if (this.options.draggable.start) {
-          this.options.draggable.start.call(this, event, ui);
-        }
-    };
-
-
-    /**
-    * This function is executed when the player is being dragged.
-    *
-    * @method on_drag
-    * @param {Event} event The original browser event
-    * @param {Object} ui A prepared ui object.
-    */
-    fn.on_drag = function(event, ui) {
-        //break if dragstop has been fired
-        if (this.$player === null) {
-            return false;
-        }
-
-        var abs_offset = {
-            left: ui.position.left + this.baseX,
-            top: ui.position.top + this.baseY
-        };
-
-        this.colliders_data = this.collision_api.get_closest_colliders(
-            abs_offset);
-
-        this.on_overlapped_column_change(
-            this.on_start_overlapping_column,
-            this.on_stop_overlapping_column
-        );
-
-        this.on_overlapped_row_change(
-            this.on_start_overlapping_row,
-            this.on_stop_overlapping_row
-        );
-
-        if (this.helper && this.$player) {
-            this.$player.css({
-                'left': ui.position.left,
-                'top': ui.position.top
-            });
-        }
-
-        if (this.options.draggable.drag) {
-            this.options.draggable.drag.call(this, event, ui);
-        }
-    };
-
-    /**
-    * This function is executed when the player stops being dragged.
-    *
-    * @method on_stop_drag
-    * @param {Event} event The original browser event
-    * @param {Object} ui A prepared ui object.
-    */
-    fn.on_stop_drag = function(event, ui) {
-        this.$helper.add(this.$player).add(this.$wrapper)
-            .removeClass('dragging');
-
-        ui.position.left = ui.position.left + this.baseX;
-        ui.position.top = ui.position.top + this.baseY;
-        this.colliders_data = this.collision_api.get_closest_colliders(ui.position);
-
-        this.on_overlapped_column_change(
-            this.on_start_overlapping_column,
-            this.on_stop_overlapping_column
-        );
-
-        this.on_overlapped_row_change(
-            this.on_start_overlapping_row,
-            this.on_stop_overlapping_row
-        );
-
-        this.$player.addClass('player-revert').removeClass('player')
-            .attr({
-                'data-col': this.placeholder_grid_data.col,
-                'data-row': this.placeholder_grid_data.row
-            }).css({
-                'left': '',
-                'top': ''
-            });
-
-        this.$changed = this.$changed.add(this.$player);
-
-        this.cells_occupied_by_player = this.get_cells_occupied(
-            this.placeholder_grid_data);
-        this.set_cells_player_occupies(
-            this.placeholder_grid_data.col, this.placeholder_grid_data.row);
-
-        this.$player.coords().grid.row = this.placeholder_grid_data.row;
-        this.$player.coords().grid.col = this.placeholder_grid_data.col;
-
-        if (this.options.draggable.stop) {
-          this.options.draggable.stop.call(this, event, ui);
-        }
-
-        this.$preview_holder.remove();
-
-        this.$player = null;
-        this.$helper = null;
-        this.placeholder_grid_data = {};
-        this.player_grid_data = {};
-        this.cells_occupied_by_placeholder = {};
-        this.cells_occupied_by_player = {};
-
-        this.set_dom_grid_height();
-    };
-
-
-    /**
-    * Executes the callbacks passed as arguments when a column begins to be
-    * overlapped or stops being overlapped.
-    *
-    * @param {Function} start_callback Function executed when a new column
-    *  begins to be overlapped. The column is passed as first argument.
-    * @param {Function} stop_callback Function executed when a column stops
-    *  being overlapped. The column is passed as first argument.
-    * @method on_overlapped_column_change
-    * @return {Class} Returns the instance of the Gridster Class.
-    */
-    fn.on_overlapped_column_change = function(start_callback, stop_callback) {
-        if (!this.colliders_data.length) {
-            return this;
-        }
-        var cols = this.get_targeted_columns(
-            this.colliders_data[0].el.data.col);
-
-        var last_n_cols = this.last_cols.length;
-        var n_cols = cols.length;
-        var i;
-
-        for (i = 0; i < n_cols; i++) {
-            if ($.inArray(cols[i], this.last_cols) === -1) {
-                (start_callback || $.noop).call(this, cols[i]);
-            }
-        }
-
-        for (i = 0; i< last_n_cols; i++) {
-            if ($.inArray(this.last_cols[i], cols) === -1) {
-                (stop_callback || $.noop).call(this, this.last_cols[i]);
-            }
-        }
-
-        this.last_cols = cols;
-
-        return this;
-    };
-
-
-    /**
-    * Executes the callbacks passed as arguments when a row starts to be
-    * overlapped or stops being overlapped.
-    *
-    * @param {Function} start_callback Function executed when a new row begins
-    *  to be overlapped. The row is passed as first argument.
-    * @param {Function} end_callback Function executed when a row stops being
-    *  overlapped. The row is passed as first argument.
-    * @method on_overlapped_row_change
-    * @return {Class} Returns the instance of the Gridster Class.
-    */
-    fn.on_overlapped_row_change = function(start_callback, end_callback) {
-        if (!this.colliders_data.length) {
-            return this;
-        }
-        var rows = this.get_targeted_rows(this.colliders_data[0].el.data.row);
-        var last_n_rows = this.last_rows.length;
-        var n_rows = rows.length;
-        var i;
-
-        for (i = 0; i < n_rows; i++) {
-            if ($.inArray(rows[i], this.last_rows) === -1) {
-                (start_callback || $.noop).call(this, rows[i]);
-            }
-        }
-
-        for (i = 0; i < last_n_rows; i++) {
-            if ($.inArray(this.last_rows[i], rows) === -1) {
-                (end_callback || $.noop).call(this, this.last_rows[i]);
-            }
-        }
-
-        this.last_rows = rows;
-    };
-
-
-    /**
-    * Sets the current position of the player
-    *
-    * @param {Number} col
-    * @param {Number} row
-    * @param {Boolean} no_player
-    * @method set_player
-    * @return {object}
-    */
-    fn.set_player = function(col, row, no_player) {
-        var self = this;
-        if (!no_player) {
-            this.empty_cells_player_occupies();
-        }
-        var cell = !no_player ? self.colliders_data[0].el.data : {col: col};
-        var to_col = cell.col;
-        var to_row = row || cell.row;
-
-        this.player_grid_data = {
-            col: to_col,
-            row: to_row,
-            size_y : this.player_grid_data.size_y,
-            size_x : this.player_grid_data.size_x
-        };
-
-        this.cells_occupied_by_player = this.get_cells_occupied(
-            this.player_grid_data);
-
-        var $overlapped_widgets = this.get_widgets_overlapped(
-            this.player_grid_data);
-
-        var constraints = this.widgets_constraints($overlapped_widgets);
-
-        this.manage_movements(constraints.can_go_up, to_col, to_row);
-        this.manage_movements(constraints.can_not_go_up, to_col, to_row);
-
-        /* if there is not widgets overlapping in the new player position,
-         * update the new placeholder position. */
-        if (!$overlapped_widgets.length) {
-            var pp = this.can_go_player_up(this.player_grid_data);
-            if (pp !== false) {
-                to_row = pp;
-            }
-            this.set_placeholder(to_col, to_row);
-        }
-
-        return {
-            col: to_col,
-            row: to_row
-        };
-    };
-
-
-    /**
-    * See which of the widgets in the $widgets param collection can go to
-    * a upper row and which not.
-    *
-    * @method widgets_contraints
-    * @param {jQuery} $widgets A jQuery wrapped collection of
-    * HTMLElements.
-    * @return {object} Returns a literal Object with two keys: `can_go_up` &
-    * `can_not_go_up`. Each contains a set of HTMLElements.
-    */
-    fn.widgets_constraints = function($widgets) {
-        var $widgets_can_go_up = $([]);
-        var $widgets_can_not_go_up;
-        var wgd_can_go_up = [];
-        var wgd_can_not_go_up = [];
-
-        $widgets.each($.proxy(function(i, w) {
-            var $w = $(w);
-            var wgd = $w.coords().grid;
-            if (this.can_go_widget_up(wgd)) {
-                $widgets_can_go_up = $widgets_can_go_up.add($w);
-                wgd_can_go_up.push(wgd);
-            }else{
-                wgd_can_not_go_up.push(wgd);
-            }
-        }, this));
-
-        $widgets_can_not_go_up = $widgets.not($widgets_can_go_up);
-
-        return {
-            can_go_up: this.sort_by_row_asc(wgd_can_go_up),
-            can_not_go_up: this.sort_by_row_desc(wgd_can_not_go_up)
-        };
-    };
-
-
-    /**
-    * Sorts an Array of grid coords objects (representing the grid coords of
-    * each widget) in ascending way.
-    *
-    * @method sort_by_row_asc
-    * @param {Array} widgets Array of grid coords objects
-    * @return {Array} Returns the array sorted.
-    */
-    fn.sort_by_row_asc = function(widgets) {
-        widgets = widgets.sort(function(a, b) {
-            if (!a.row) {
-                a = $(a).coords().grid;
-                b = $(b).coords().grid;
-            }
-
-           if (a.row > b.row) {
-               return 1;
-           }
-           return -1;
-        });
-
-        return widgets;
-    };
-
-
-    /**
-    * Sorts an Array of grid coords objects (representing the grid coords of
-    * each widget) placing first the empty cells upper left.
-    *
-    * @method sort_by_row_and_col_asc
-    * @param {Array} widgets Array of grid coords objects
-    * @return {Array} Returns the array sorted.
-    */
-    fn.sort_by_row_and_col_asc = function(widgets) {
-        widgets = widgets.sort(function(a, b) {
-           if (a.row > b.row || a.row === b.row && a.col > b.col) {
-               return 1;
-           }
-           return -1;
-        });
-
-        return widgets;
-    };
-
-
-    /**
-    * Sorts an Array of grid coords objects by column (representing the grid
-    * coords of each widget) in ascending way.
-    *
-    * @method sort_by_col_asc
-    * @param {Array} widgets Array of grid coords objects
-    * @return {Array} Returns the array sorted.
-    */
-    fn.sort_by_col_asc = function(widgets) {
-        widgets = widgets.sort(function(a, b) {
-           if (a.col > b.col) {
-               return 1;
-           }
-           return -1;
-        });
-
-        return widgets;
-    };
-
-
-    /**
-    * Sorts an Array of grid coords objects (representing the grid coords of
-    * each widget) in descending way.
-    *
-    * @method sort_by_row_desc
-    * @param {Array} widgets Array of grid coords objects
-    * @return {Array} Returns the array sorted.
-    */
-    fn.sort_by_row_desc = function(widgets) {
-        widgets = widgets.sort(function(a, b) {
-            if (a.row + a.size_y < b.row + b.size_y) {
-                return 1;
-            }
-           return -1;
-        });
-        return widgets;
-    };
-
-
-    /**
-    * Sorts an Array of grid coords objects (representing the grid coords of
-    * each widget) in descending way.
-    *
-    * @method manage_movements
-    * @param {jQuery} $widgets A jQuery collection of HTMLElements
-    *  representing the widgets you want to move.
-    * @param {Number} to_col The column to which we want to move the widgets.
-    * @param {Number} to_row The row to which we want to move the widgets.
-    * @return {Class} Returns the instance of the Gridster Class.
-    */
-    fn.manage_movements = function($widgets, to_col, to_row) {
-        $.each($widgets, $.proxy(function(i, w) {
-            var wgd = w;
-            var $w = wgd.el;
-
-            var can_go_widget_up = this.can_go_widget_up(wgd);
-
-            if (can_go_widget_up) {
-                //target CAN go up
-                //so move widget up
-                this.move_widget_to($w, can_go_widget_up);
-                this.set_placeholder(to_col, can_go_widget_up + wgd.size_y);
-
-            } else {
-                //target can't go up
-                var can_go_player_up = this.can_go_player_up(
-                    this.player_grid_data);
-
-                if (!can_go_player_up) {
-                    // target can't go up
-                    // player cant't go up
-                    // so we need to move widget down to a position that dont
-                    // overlaps player
-                    var y = (to_row + this.player_grid_data.size_y) - wgd.row;
-
-                    this.move_widget_down($w, y);
-                    this.set_placeholder(to_col, to_row);
-                }
-            }
-        }, this));
-
-        return this;
-    };
-
-    /**
-    * Determines if there is a widget in the row and col given. Or if the
-    * HTMLElement passed as first argument is the player.
-    *
-    * @method is_player
-    * @param {Number|HTMLElement} col_or_el A jQuery wrapped collection of
-    * HTMLElements.
-    * @param {Number} [row] The column to which we want to move the widgets.
-    * @return {Boolean} Returns true or false.
-    */
-    fn.is_player = function(col_or_el, row) {
-        if (row && !this.gridmap[col_or_el]) { return false; }
-        var $w = row ? this.gridmap[col_or_el][row] : col_or_el;
-        return $w && ($w.is(this.$player) || $w.is(this.$helper));
-    };
-
-
-    /**
-    * Determines if the widget that is being dragged is currently over the row
-    * and col given.
-    *
-    * @method is_player_in
-    * @param {Number} col The column to check.
-    * @param {Number} row The row to check.
-    * @return {Boolean} Returns true or false.
-    */
-    fn.is_player_in = function(col, row) {
-        var c = this.cells_occupied_by_player || {};
-        return $.inArray(col, c.cols) >= 0 && $.inArray(row, c.rows) >= 0;
-    };
-
-
-    /**
-    * Determines if the placeholder is currently over the row and col given.
-    *
-    * @method is_placeholder_in
-    * @param {Number} col The column to check.
-    * @param {Number} row The row to check.
-    * @return {Boolean} Returns true or false.
-    */
-    fn.is_placeholder_in = function(col, row) {
-        var c = this.cells_occupied_by_placeholder || {};
-        return this.is_placeholder_in_col(col) && $.inArray(row, c.rows) >= 0;
-    };
-
-
-    /**
-    * Determines if the placeholder is currently over the column given.
-    *
-    * @method is_placeholder_in_col
-    * @param {Number} col The column to check.
-    * @return {Boolean} Returns true or false.
-    */
-    fn.is_placeholder_in_col = function(col) {
-        var c = this.cells_occupied_by_placeholder || [];
-        return $.inArray(col, c.cols) >= 0;
-    };
-
-
-    /**
-    * Determines if the cell represented by col and row params is empty.
-    *
-    * @method is_empty
-    * @param {Number} col The column to check.
-    * @param {Number} row The row to check.
-    * @return {Boolean} Returns true or false.
-    */
-    fn.is_empty = function(col, row) {
-        if (typeof this.gridmap[col] !== 'undefined' &&
-            typeof this.gridmap[col][row] !== 'undefined' &&
-            this.gridmap[col][row] === false
-        ) {
-            return true;
-        }
-        return false;
-    };
-
-
-    /**
-    * Determines if the cell represented by col and row params is occupied.
-    *
-    * @method is_occupied
-    * @param {Number} col The column to check.
-    * @param {Number} row The row to check.
-    * @return {Boolean} Returns true or false.
-    */
-    fn.is_occupied = function(col, row) {
-        if (!this.gridmap[col]) {
-            return false;
-        }
-
-        if (this.gridmap[col][row]) {
-            return true;
-        }
-        return false;
-    };
-
-
-    /**
-    * Determines if there is a widget in the cell represented by col/row params.
-    *
-    * @method is_widget
-    * @param {Number} col The column to check.
-    * @param {Number} row The row to check.
-    * @return {Boolean|HTMLElement} Returns false if there is no widget,
-    * else returns the jQuery HTMLElement
-    */
-    fn.is_widget = function(col, row) {
-        var cell = this.gridmap[col];
-        if (!cell) {
-            return false;
-        }
-
-        cell = cell[row];
-
-        if (cell) {
-            return cell;
-        }
-
-        return false;
-    };
-
-
-    /**
-    * Determines if there is a widget in the cell represented by col/row
-    * params and if this is under the widget that is being dragged.
-    *
-    * @method is_widget_under_player
-    * @param {Number} col The column to check.
-    * @param {Number} row The row to check.
-    * @return {Boolean} Returns true or false.
-    */
-    fn.is_widget_under_player = function(col, row) {
-        if (this.is_widget(col, row)) {
-            return this.is_player_in(col, row);
-        }
-        return false;
-    };
-
-
-    /**
-    * Get widgets overlapping with the player or with the object passed
-    * representing the grid cells.
-    *
-    * @method get_widgets_under_player
-    * @return {HTMLElement} Returns a jQuery collection of HTMLElements
-    */
-    fn.get_widgets_under_player = function(cells) {
-        cells || (cells = this.cells_occupied_by_player || {cols: [], rows: []});
-        var $widgets = $([]);
-
-        $.each(cells.cols, $.proxy(function(i, col) {
-            $.each(cells.rows, $.proxy(function(i, row) {
-                if(this.is_widget(col, row)) {
-                    $widgets = $widgets.add(this.gridmap[col][row]);
-                }
-            }, this));
-        }, this));
-
-        return $widgets;
-    };
-
-
-    /**
-    * Put placeholder at the row and column specified.
-    *
-    * @method set_placeholder
-    * @param {Number} col The column to which we want to move the
-    *  placeholder.
-    * @param {Number} row The row to which we want to move the
-    *  placeholder.
-    * @return {Class} Returns the instance of the Gridster Class.
-    */
-    fn.set_placeholder = function(col, row) {
-        var phgd = $.extend({}, this.placeholder_grid_data);
-        var $nexts = this.widgets_below({
-                col: phgd.col,
-                row: phgd.row,
-                size_y: phgd.size_y,
-                size_x: phgd.size_x
-            });
-
-        // Prevents widgets go out of the grid
-        var right_col = (col + phgd.size_x - 1);
-        if (right_col > this.cols) {
-            col = col - (right_col - col);
-        }
-
-        var moved_down = this.placeholder_grid_data.row < row;
-        var changed_column = this.placeholder_grid_data.col !== col;
-
-        this.placeholder_grid_data.col = col;
-        this.placeholder_grid_data.row = row;
-
-        this.cells_occupied_by_placeholder = this.get_cells_occupied(
-            this.placeholder_grid_data);
-
-        this.$preview_holder.attr({
-            'data-row' : row,
-            'data-col' : col
-        });
-
-        if (moved_down || changed_column) {
-            $nexts.each($.proxy(function(i, widget) {
-                this.move_widget_up(
-                 $(widget), this.placeholder_grid_data.col - col + phgd.size_y);
-            }, this));
-        }
-
-
-        var $widgets_under_ph = this.get_widgets_under_player(this.cells_occupied_by_placeholder);
-        if ($widgets_under_ph.length) {
-            $widgets_under_ph.each($.proxy(function(i, widget) {
-                var $w = $(widget);
-                this.move_widget_down(
-                 $w, row + phgd.size_y - $w.data('coords').grid.row);
-            }, this));
-        }
-
-    };
-
-
-    /**
-    * Determines whether the player can move to a position above.
-    *
-    * @method can_go_player_up
-    * @param {Object} widget_grid_data The actual grid coords object of the
-    *  player.
-    * @return {Number|Boolean} If the player can be moved to an upper row
-    *  returns the row number, else returns false.
-    */
-    fn.can_go_player_up = function(widget_grid_data) {
-        var p_bottom_row = widget_grid_data.row + widget_grid_data.size_y - 1;
-        var result = true;
-        var upper_rows = [];
-        var min_row = 10000;
-        var $widgets_under_player = this.get_widgets_under_player();
-
-        /* generate an array with columns as index and array with upper rows
-         * empty as value */
-        this.for_each_column_occupied(widget_grid_data, function(tcol) {
-            var grid_col = this.gridmap[tcol];
-            var r = p_bottom_row + 1;
-            upper_rows[tcol] = [];
-
-            while (--r > 0) {
-                if (this.is_empty(tcol, r) || this.is_player(tcol, r) ||
-                    this.is_widget(tcol, r) &&
-                    grid_col[r].is($widgets_under_player)
-                ) {
-                    upper_rows[tcol].push(r);
-                    min_row = r < min_row ? r : min_row;
-                }else{
-                    break;
-                }
-            }
-
-            if (upper_rows[tcol].length === 0) {
-                result = false;
-                return true; //break
-            }
-
-            upper_rows[tcol].sort();
-        });
-
-        if (!result) { return false; }
-
-        return this.get_valid_rows(widget_grid_data, upper_rows, min_row);
-    };
-
-
-    /**
-    * Determines whether a widget can move to a position above.
-    *
-    * @method can_go_widget_up
-    * @param {Object} widget_grid_data The actual grid coords object of the
-    *  widget we want to check.
-    * @return {Number|Boolean} If the widget can be moved to an upper row
-    *  returns the row number, else returns false.
-    */
-    fn.can_go_widget_up = function(widget_grid_data) {
-        var p_bottom_row = widget_grid_data.row + widget_grid_data.size_y - 1;
-        var result = true;
-        var upper_rows = [];
-        var min_row = 10000;
-
-        /* generate an array with columns as index and array with topmost rows
-         * empty as value */
-        this.for_each_column_occupied(widget_grid_data, function(tcol) {
-            var grid_col = this.gridmap[tcol];
-            upper_rows[tcol] = [];
-
-            var r = p_bottom_row + 1;
-            // iterate over each row
-            while (--r > 0) {
-                if (this.is_widget(tcol, r) && !this.is_player_in(tcol, r)) {
-                    if (!grid_col[r].is(widget_grid_data.el)) {
-                        break;
-                    }
-                }
-
-                if (!this.is_player(tcol, r) &&
-                    !this.is_placeholder_in(tcol, r) &&
-                    !this.is_player_in(tcol, r)) {
-                    upper_rows[tcol].push(r);
-                }
-
-                if (r < min_row) {
-                    min_row = r;
-                }
-            }
-
-            if (upper_rows[tcol].length === 0) {
-                result = false;
-                return true; //break
-            }
-
-            upper_rows[tcol].sort();
-        });
-
-        if (!result) { return false; }
-
-        return this.get_valid_rows(widget_grid_data, upper_rows, min_row);
-    };
-
-
-    /**
-    * Search a valid row for the widget represented by `widget_grid_data' in
-    * the `upper_rows` array. Iteration starts from row specified in `min_row`.
-    *
-    * @method get_valid_rows
-    * @param {Object} widget_grid_data The actual grid coords object of the
-    *  player.
-    * @param {Array} upper_rows An array with columns as index and arrays
-    *  of valid rows as values.
-    * @param {Number} min_row The upper row from which the iteration will start.
-    * @return {Number|Boolean} Returns the upper row valid from the `upper_rows`
-    *  for the widget in question.
-    */
-    fn.get_valid_rows = function(widget_grid_data, upper_rows, min_row) {
-        var p_top_row = widget_grid_data.row;
-        var p_bottom_row = widget_grid_data.row + widget_grid_data.size_y - 1;
-        var size_y = widget_grid_data.size_y;
-        var r = min_row - 1;
-        var valid_rows = [];
-
-        while (++r <= p_bottom_row ) {
-            var common = true;
-            $.each(upper_rows, function(col, rows) {
-                if ($.isArray(rows) && $.inArray(r, rows) === -1) {
-                    common = false;
-                }
-            });
-
-            if (common === true) {
-                valid_rows.push(r);
-                if (valid_rows.length === size_y) {
-                    break;
-                }
-            }
-        }
-
-        var new_row = false;
-        if (size_y === 1) {
-            if (valid_rows[0] !== p_top_row) {
-                new_row = valid_rows[0] || false;
-            }
-        }else{
-            if (valid_rows[0] !== p_top_row) {
-                new_row = this.get_consecutive_numbers_index(
-                    valid_rows, size_y);
-            }
-        }
-
-        return new_row;
-    };
-
-
-    fn.get_consecutive_numbers_index = function(arr, size_y) {
-        var max = arr.length;
-        var result = [];
-        var first = true;
-        var prev = -1; // or null?
-
-        for (var i=0; i < max; i++) {
-            if (first || arr[i] === prev + 1) {
-                result.push(i);
-                if (result.length === size_y) {
-                    break;
-                }
-                first = false;
-            }else{
-                result = [];
-                first = true;
-            }
-
-            prev = arr[i];
-        }
-
-        return result.length >= size_y ? arr[result[0]] : false;
-    };
-
-
-    /**
-    * Get widgets overlapping with the player.
-    *
-    * @method get_widgets_overlapped
-    * @return {jQuery} Returns a jQuery collection of HTMLElements.
-    */
-    fn.get_widgets_overlapped = function() {
-        var $w;
-        var $widgets = $([]);
-        var used = [];
-        var rows_from_bottom = this.cells_occupied_by_player.rows.slice(0);
-        rows_from_bottom.reverse();
-
-        $.each(this.cells_occupied_by_player.cols, $.proxy(function(i, col) {
-            $.each(rows_from_bottom, $.proxy(function(i, row) {
-                // if there is a widget in the player position
-                if (!this.gridmap[col]) { return true; } //next iteration
-                var $w = this.gridmap[col][row];
-                if (this.is_occupied(col, row) && !this.is_player($w) &&
-                    $.inArray($w, used) === -1
-                ) {
-                    $widgets = $widgets.add($w);
-                    used.push($w);
-                }
-
-            }, this));
-        }, this));
-
-        return $widgets;
-    };
-
-
-    /**
-    * This callback is executed when the player begins to collide with a column.
-    *
-    * @method on_start_overlapping_column
-    * @param {Number} col The collided column.
-    * @return {jQuery} Returns a jQuery collection of HTMLElements.
-    */
-    fn.on_start_overlapping_column = function(col) {
-        this.set_player(col, false);
-    };
-
-
-    /**
-    * A callback executed when the player begins to collide with a row.
-    *
-    * @method on_start_overlapping_row
-    * @param {Number} row The collided row.
-    * @return {jQuery} Returns a jQuery collection of HTMLElements.
-    */
-    fn.on_start_overlapping_row = function(row) {
-        this.set_player(false, row);
-    };
-
-
-    /**
-    * A callback executed when the the player ends to collide with a column.
-    *
-    * @method on_stop_overlapping_column
-    * @param {Number} col The collided row.
-    * @return {jQuery} Returns a jQuery collection of HTMLElements.
-    */
-    fn.on_stop_overlapping_column = function(col) {
-        this.set_player(col, false);
-
-        var self = this;
-        this.for_each_widget_below(col, this.cells_occupied_by_player.rows[0],
-            function(tcol, trow) {
-                self.move_widget_up(this, self.player_grid_data.size_y);
-        });
-    };
-
-
-    /**
-    * This callback is executed when the player ends to collide with a row.
-    *
-    * @method on_stop_overlapping_row
-    * @param {Number} row The collided row.
-    * @return {jQuery} Returns a jQuery collection of HTMLElements.
-    */
-    fn.on_stop_overlapping_row = function(row) {
-        this.set_player(false, row);
-
-        var self = this;
-        var cols = this.cells_occupied_by_player.cols;
-        for (var c = 0, cl = cols.length; c < cl; c++) {
-            this.for_each_widget_below(cols[c], row, function(tcol, trow) {
-                self.move_widget_up(this, self.player_grid_data.size_y);
-            });
-        }
-    };
-
-
-    /**
-    * Move a widget to a specific row. The cell or cells must be empty.
-    * If the widget has widgets below, all of these widgets will be moved also
-    * if they can.
-    *
-    * @method move_widget_to
-    * @param {HTMLElement} $widget The jQuery wrapped HTMLElement of the
-    * widget is going to be moved.
-    * @return {Class} Returns the instance of the Gridster Class.
-    */
-    fn.move_widget_to = function($widget, row) {
-        var self = this;
-        var widget_grid_data = $widget.coords().grid;
-        var diff = row - widget_grid_data.row;
-        var $next_widgets = this.widgets_below($widget);
-
-        var can_move_to_new_cell = this.can_move_to(
-            widget_grid_data, widget_grid_data.col, row, $widget);
-
-        if (can_move_to_new_cell === false) {
-            return false;
-        }
-
-        this.remove_from_gridmap(widget_grid_data);
-        widget_grid_data.row = row;
-        this.add_to_gridmap(widget_grid_data);
-        $widget.attr('data-row', row);
-        this.$changed = this.$changed.add($widget);
-
-
-        $next_widgets.each(function(i, widget) {
-            var $w = $(widget);
-            var wgd = $w.coords().grid;
-            var can_go_up = self.can_go_widget_up(wgd);
-            if (can_go_up && can_go_up !== wgd.row) {
-                self.move_widget_to($w, can_go_up);
-            }
-        });
-
-        return this;
-    };
-
-
-    /**
-    * Move up the specified widget and all below it.
-    *
-    * @method move_widget_up
-    * @param {HTMLElement} $widget The widget you want to move.
-    * @param {Number} [y_units] The number of cells that the widget has to move.
-    * @return {Class} Returns the instance of the Gridster Class.
-    */
-    fn.move_widget_up = function($widget, y_units) {
-        var el_grid_data = $widget.coords().grid;
-        var actual_row = el_grid_data.row;
-        var moved = [];
-        var can_go_up = true;
-        y_units || (y_units = 1);
-
-        if (!this.can_go_up($widget)) { return false; } //break;
-
-        this.for_each_column_occupied(el_grid_data, function(col) {
-            // can_go_up
-            if ($.inArray($widget, moved) === -1) {
-                var widget_grid_data = $widget.coords().grid;
-                var next_row = actual_row - y_units;
-                next_row = this.can_go_up_to_row(
-                    widget_grid_data, col, next_row);
-
-                if (!next_row) {
-                    return true;
-                }
-
-                var $next_widgets = this.widgets_below($widget);
-
-                this.remove_from_gridmap(widget_grid_data);
-                widget_grid_data.row = next_row;
-                this.add_to_gridmap(widget_grid_data);
-                $widget.attr('data-row', widget_grid_data.row);
-                this.$changed = this.$changed.add($widget);
-
-                moved.push($widget);
-
-                $next_widgets.each($.proxy(function(i, widget) {
-                    this.move_widget_up($(widget), y_units);
-                }, this));
-            }
-        });
-
-    };
-
-
-    /**
-    * Move down the specified widget and all below it.
-    *
-    * @method move_widget_down
-    * @param {jQuery} $widget The jQuery object representing the widget
-    *  you want to move.
-    * @param {Number} y_units The number of cells that the widget has to move.
-    * @return {Class} Returns the instance of the Gridster Class.
-    */
-    fn.move_widget_down = function($widget, y_units) {
-        var el_grid_data = $widget.coords().grid;
-        var actual_row = el_grid_data.row;
-        var moved = [];
-        var y_diff = y_units;
-
-        if (!$widget) { return false; }
-
-        if ($.inArray($widget, moved) === -1) {
-
-            var widget_grid_data = $widget.coords().grid;
-            var next_row = actual_row + y_units;
-            var $next_widgets = this.widgets_below($widget);
-
-            this.remove_from_gridmap(widget_grid_data);
-
-            $next_widgets.each($.proxy(function(i, widget) {
-                var $w = $(widget);
-                var wd = $w.coords().grid;
-                var tmp_y = this.displacement_diff(
-                             wd, widget_grid_data, y_diff);
-
-                if (tmp_y > 0) {
-                    this.move_widget_down($w, tmp_y);
-                }
-            }, this));
-
-            widget_grid_data.row = next_row;
-            this.update_widget_position(widget_grid_data, $widget);
-            $widget.attr('data-row', widget_grid_data.row);
-            this.$changed = this.$changed.add($widget);
-
-            moved.push($widget);
-        }
-    };
-
-
-    /**
-    * Check if the widget can move to the specified row, else returns the
-    * upper row possible.
-    *
-    * @method can_go_up_to_row
-    * @param {Number} widget_grid_data The current grid coords object of the
-    *  widget.
-    * @param {Number} col The target column.
-    * @param {Number} row The target row.
-    * @return {Boolean|Number} Returns the row number if the widget can move
-    *  to the target position, else returns false.
-    */
-    fn.can_go_up_to_row = function(widget_grid_data, col, row) {
-        var ga = this.gridmap;
-        var result = true;
-        var urc = []; // upper_rows_in_columns
-        var actual_row = widget_grid_data.row;
-        var r;
-
-        /* generate an array with columns as index and array with
-         * upper rows empty in the column */
-        this.for_each_column_occupied(widget_grid_data, function(tcol) {
-            var grid_col = ga[tcol];
-            urc[tcol] = [];
-
-            r = actual_row;
-            while (r--) {
-                if (this.is_empty(tcol, r) &&
-                    !this.is_placeholder_in(tcol, r)
-                ) {
-                    urc[tcol].push(r);
-                }else{
-                    break;
-                }
-            }
-
-            if (!urc[tcol].length) {
-                result = false;
-                return true;
-            }
-
-        });
-
-        if (!result) { return false; }
-
-        /* get common rows starting from upper position in all the columns
-         * that widget occupies */
-        r = row;
-        for (r = 1; r < actual_row; r++) {
-            var common = true;
-
-            for (var uc = 0, ucl = urc.length; uc < ucl; uc++) {
-                if (urc[uc] && $.inArray(r, urc[uc]) === -1) {
-                    common = false;
-                }
-            }
-
-            if (common === true) {
-                result = r;
-                break;
-            }
-        }
-
-        return result;
-    };
-
-
-    fn.displacement_diff = function(widget_grid_data, parent_bgd, y_units) {
-        var actual_row = widget_grid_data.row;
-        var diffs = [];
-        var parent_max_y = parent_bgd.row + parent_bgd.size_y;
-
-        this.for_each_column_occupied(widget_grid_data, function(col) {
-            var temp_y_units = 0;
-
-            for (var r = parent_max_y; r < actual_row; r++) {
-                if (this.is_empty(col, r)) {
-                    temp_y_units = temp_y_units + 1;
-                }
-            }
-
-            diffs.push(temp_y_units);
-        });
-
-        var max_diff = Math.max.apply(Math, diffs);
-        y_units = (y_units - max_diff);
-
-        return y_units > 0 ? y_units : 0;
-    };
-
-
-    /**
-    * Get widgets below a widget.
-    *
-    * @method widgets_below
-    * @param {HTMLElement} $el The jQuery wrapped HTMLElement.
-    * @return {jQuery} A jQuery collection of HTMLElements.
-    */
-    fn.widgets_below = function($el) {
-        var el_grid_data = $.isPlainObject($el) ? $el : $el.coords().grid;
-        var self = this;
-        var ga = this.gridmap;
-        var next_row = el_grid_data.row + el_grid_data.size_y - 1;
-        var $nexts = $([]);
-
-        this.for_each_column_occupied(el_grid_data, function(col) {
-            self.for_each_widget_below(col, next_row, function(tcol, trow) {
-                if (!self.is_player(this) && $.inArray(this, $nexts) === -1) {
-                    $nexts = $nexts.add(this);
-                    return true; // break
-                }
-            });
-        });
-
-        return this.sort_by_row_asc($nexts);
-    };
-
-
-    /**
-    * Update the array of mapped positions with the new player position.
-    *
-    * @method set_cells_player_occupies
-    * @param {Number} col The new player col.
-    * @param {Number} col The new player row.
-    * @return {Class} Returns the instance of the Gridster Class.
-    */
-    fn.set_cells_player_occupies = function(col, row) {
-        this.remove_from_gridmap(this.placeholder_grid_data);
-        this.placeholder_grid_data.col = col;
-        this.placeholder_grid_data.row = row;
-        this.add_to_gridmap(this.placeholder_grid_data, this.$player);
-        return this;
-    };
-
-
-    /**
-    * Remove from the array of mapped positions the reference to the player.
-    *
-    * @method empty_cells_player_occupies
-    * @return {Class} Returns the instance of the Gridster Class.
-    */
-    fn.empty_cells_player_occupies = function() {
-        this.remove_from_gridmap(this.placeholder_grid_data);
-        return this;
-    };
-
-
-    fn.can_go_up = function($el) {
-        var el_grid_data = $el.coords().grid;
-        var initial_row = el_grid_data.row;
-        var prev_row = initial_row - 1;
-        var ga = this.gridmap;
-        var upper_rows_by_column = [];
-
-        var result = true;
-        if (initial_row === 1) { return false; }
-
-        this.for_each_column_occupied(el_grid_data, function(col) {
-            var $w = this.is_widget(col, prev_row);
-
-            if (this.is_occupied(col, prev_row) ||
-                this.is_player(col, prev_row) ||
-                this.is_placeholder_in(col, prev_row) ||
-                this.is_player_in(col, prev_row)
-            ) {
-                result = false;
-                return true; //break
-            }
-        });
-
-        return result;
-    };
-
-
-
-    /**
-    * Check if it's possible to move a widget to a specific col/row. It takes
-    * into account the dimensions (`size_y` and `size_x` attrs. of the grid
-    *  coords object) the widget occupies.
-    *
-    * @method can_move_to
-    * @param {Object} widget_grid_data The grid coords object that represents
-    *  the widget.
-    * @param {Object} col The col to check.
-    * @param {Object} row The row to check.
-    * @param {Number} [max_row] The max row allowed.
-    * @return {Boolean} Returns true if all cells are empty, else return false.
-    */
-    fn.can_move_to = function(widget_grid_data, col, row, max_row) {
-        var ga = this.gridmap;
-        var $w = widget_grid_data.el;
-        var future_wd = {
-            size_y: widget_grid_data.size_y,
-            size_x: widget_grid_data.size_x,
-            col: col,
-            row: row
-        };
-        var result = true;
-
-        //Prevents widgets go out of the grid
-        var right_col = col + widget_grid_data.size_x - 1;
-        if (right_col > this.cols) {
-            return false;
-        }
-
-        if (max_row && max_row < row + widget_grid_data.size_y - 1) {
-            return false;
-        }
-
-        this.for_each_cell_occupied(future_wd, function(tcol, trow) {
-            var $tw = this.is_widget(tcol, trow);
-            if ($tw && (!widget_grid_data.el || $tw.is($w))) {
-                result = false;
-            }
-        });
-
-        return result;
-    };
-
-
-    /**
-    * Given the leftmost column returns all columns that are overlapping
-    *  with the player.
-    *
-    * @method get_targeted_columns
-    * @param {Number} [from_col] The leftmost column.
-    * @return {Array} Returns an array with column numbers.
-    */
-    fn.get_targeted_columns = function(from_col) {
-        var max = (from_col || this.player_grid_data.col) +
-            (this.player_grid_data.size_x - 1);
-        var cols = [];
-        for (var col = from_col; col <= max; col++) {
-            cols.push(col);
-        }
-        return cols;
-    };
-
-
-    /**
-    * Given the upper row returns all rows that are overlapping with the player.
-    *
-    * @method get_targeted_rows
-    * @param {Number} [from_row] The upper row.
-    * @return {Array} Returns an array with row numbers.
-    */
-    fn.get_targeted_rows = function(from_row) {
-        var max = (from_row || this.player_grid_data.row) +
-            (this.player_grid_data.size_y - 1);
-        var rows = [];
-        for (var row = from_row; row <= max; row++) {
-            rows.push(row);
-        }
-        return rows;
-    };
-
-    /**
-    * Get all columns and rows that a widget occupies.
-    *
-    * @method get_cells_occupied
-    * @param {Object} el_grid_data The grid coords object of the widget.
-    * @return {Object} Returns an object like `{ cols: [], rows: []}`.
-    */
-    fn.get_cells_occupied = function(el_grid_data) {
-        var cells = { cols: [], rows: []};
-        var i;
-        if (arguments[1] instanceof jQuery) {
-            el_grid_data = arguments[1].coords().grid;
-        }
-
-        for (i = 0; i < el_grid_data.size_x; i++) {
-            var col = el_grid_data.col + i;
-            cells.cols.push(col);
-        }
-
-        for (i = 0; i < el_grid_data.size_y; i++) {
-            var row = el_grid_data.row + i;
-            cells.rows.push(row);
-        }
-
-        return cells;
-    };
-
-
-    /**
-    * Iterate over the cells occupied by a widget executing a function for
-    * each one.
-    *
-    * @method for_each_cell_occupied
-    * @param {Object} el_grid_data The grid coords object that represents the
-    *  widget.
-    * @param {Function} callback The function to execute on each column
-    *  iteration. Column and row are passed as arguments.
-    * @return {Class} Returns the instance of the Gridster Class.
-    */
-    fn.for_each_cell_occupied = function(grid_data, callback) {
-        this.for_each_column_occupied(grid_data, function(col) {
-            this.for_each_row_occupied(grid_data, function(row) {
-                callback.call(this, col, row);
-            });
-        });
-        return this;
-    };
-
-
-    /**
-    * Iterate over the columns occupied by a widget executing a function for
-    * each one.
-    *
-    * @method for_each_column_occupied
-    * @param {Object} el_grid_data The grid coords object that represents
-    *  the widget.
-    * @param {Function} callback The function to execute on each column
-    *  iteration. The column number is passed as first argument.
-    * @return {Class} Returns the instance of the Gridster Class.
-    */
-    fn.for_each_column_occupied = function(el_grid_data, callback) {
-        for (var i = 0; i < el_grid_data.size_x; i++) {
-            var col = el_grid_data.col + i;
-            callback.call(this, col, el_grid_data);
-        }
-    };
-
-
-    /**
-    * Iterate over the rows occupied by a widget executing a function for
-    * each one.
-    *
-    * @method for_each_row_occupied
-    * @param {Object} el_grid_data The grid coords object that represents
-    *  the widget.
-    * @param {Function} callback The function to execute on each column
-    *  iteration. The row number is passed as first argument.
-    * @return {Class} Returns the instance of the Gridster Class.
-    */
-    fn.for_each_row_occupied = function(el_grid_data, callback) {
-        for (var i = 0; i < el_grid_data.size_y; i++) {
-            var row = el_grid_data.row + i;
-            callback.call(this, row, el_grid_data);
-        }
-    };
-
-
-
-    fn._traversing_widgets = function(type, direction, col, row, callback) {
-        var ga = this.gridmap;
-        if (!ga[col]) { return; }
-
-        var cr, max;
-        var action = type + '/' + direction;
-        if (arguments[2] instanceof jQuery) {
-            var el_grid_data = arguments[2].coords().grid;
-            col = el_grid_data.col;
-            row = el_grid_data.row;
-            callback = arguments[3];
-        }
-        var matched = [];
-        var trow = row;
-
-
-        var methods = {
-            'for_each/above': function() {
-                while (trow--) {
-                    if (trow > 0 && this.is_widget(col, trow) &&
-                        $.inArray(ga[col][trow], matched) === -1
-                    ) {
-                        cr = callback.call(ga[col][trow], col, trow);
-                        matched.push(ga[col][trow]);
-                        if (cr) { break; }
-                    }
-                }
-            },
-            'for_each/below': function() {
-                for (trow = row + 1, max = ga[col].length; trow < max; trow++) {
-                    if (this.is_widget(col, trow) &&
-                        $.inArray(ga[col][trow], matched) === -1
-                    ) {
-                        cr = callback.call(ga[col][trow], col, trow);
-                        matched.push(ga[col][trow]);
-                        if (cr) { break; }
-                    }
-                }
-            }
-        };
-
-        if (methods[action]) {
-            methods[action].call(this);
-        }
-    };
-
-
-    /**
-    * Iterate over each widget above the column and row specified.
-    *
-    * @method for_each_widget_above
-    * @param {Number} col The column to start iterating.
-    * @param {Number} row The row to start iterating.
-    * @param {Function} callback The function to execute on each widget
-    *  iteration. The value of `this` inside the function is the jQuery
-    *  wrapped HTMLElement.
-    * @return {Class} Returns the instance of the Gridster Class.
-    */
-    fn.for_each_widget_above = function(col, row, callback) {
-        this._traversing_widgets('for_each', 'above', col, row, callback);
-        return this;
-    };
-
-
-    /**
-    * Iterate over each widget below the column and row specified.
-    *
-    * @method for_each_widget_below
-    * @param {Number} col The column to start iterating.
-    * @param {Number} row The row to start iterating.
-    * @param {Function} callback The function to execute on each widget
-    *  iteration. The value of `this` inside the function is the jQuery wrapped
-    *  HTMLElement.
-    * @return {Class} Returns the instance of the Gridster Class.
-    */
-    fn.for_each_widget_below = function(col, row, callback) {
-        this._traversing_widgets('for_each', 'below', col, row, callback);
-        return this;
-    };
-
-
-    /**
-    * Returns the highest occupied cell in the grid.
-    *
-    * @method get_highest_occupied_cell
-    * @return {Object} Returns an object with `col` and `row` numbers.
-    */
-    fn.get_highest_occupied_cell = function() {
-        var r;
-        var gm = this.gridmap;
-        var rows = [];
-        var row_in_col = [];
-        for (var c = gm.length - 1; c >= 1; c--) {
-            for (r = gm[c].length - 1; r >= 1; r--) {
-                if (this.is_widget(c, r)) {
-                    rows.push(r);
-                    row_in_col[r] = c;
-                    break;
-                }
-            }
-        }
-
-        var highest_row = Math.max.apply(Math, rows);
-
-        this.highest_occupied_cell = {
-            col: row_in_col[highest_row],
-            row: highest_row
-        };
-
-        return this.highest_occupied_cell;
-    };
-
-
-    fn.get_widgets_from = function(col, row) {
-        var ga = this.gridmap;
-        var $widgets = $();
-
-        if (col) {
-            $widgets = $widgets.add(
-                this.$widgets.filter(function() {
-                    var tcol = $(this).attr('data-col');
-                    return (tcol === col || tcol > col);
-                })
-            );
-        }
-
-        if (row) {
-            $widgets = $widgets.add(
-                this.$widgets.filter(function() {
-                    var trow = $(this).attr('data-row');
-                    return (trow === row || trow > row);
-                })
-            );
-        }
-
-        return $widgets;
-    };
-
-
-    /**
-    * Set the current height of the parent grid.
-    *
-    * @method set_dom_grid_height
-    * @return {Object} Returns the instance of the Gridster class.
-    */
-    fn.set_dom_grid_height = function() {
-        var r = this.get_highest_occupied_cell().row;
-        this.$el.css('height', r * this.min_widget_height);
-        return this;
-    };
-
-
-    /**
-    * It generates the neccessary styles to position the widgets.
-    *
-    * @method generate_stylesheet
-    * @param {Number} rows Number of columns.
-    * @param {Number} cols Number of rows.
-    * @return {Object} Returns the instance of the Gridster class.
-    */
-    fn.generate_stylesheet = function(opts) {
-        var styles = '';
-        var max_size_x = this.options.max_size_x;
-        var max_rows = 0;
-        var max_cols = 0;
-        var i;
-        var rules;
-
-        opts || (opts = {});
-        opts.cols || (opts.cols = this.cols);
-        opts.rows || (opts.rows = this.rows);
-        opts.namespace || (opts.namespace = this.options.namespace);
-        opts.widget_base_dimensions ||
-            (opts.widget_base_dimensions = this.options.widget_base_dimensions);
-        opts.widget_margins ||
-            (opts.widget_margins = this.options.widget_margins);
-        opts.min_widget_width = (opts.widget_margins[0] * 2) +
-            opts.widget_base_dimensions[0];
-        opts.min_widget_height = (opts.widget_margins[1] * 2) +
-            opts.widget_base_dimensions[1];
-
-        // don't duplicate stylesheets for the same configuration
-        var serialized_opts = $.param(opts);
-        if ($.inArray(serialized_opts, Gridster.generated_stylesheets) >= 0) {
-            return false;
-        }
-
-        Gridster.generated_stylesheets.push(serialized_opts);
-
-        /* generate CSS styles for cols */
-        for (i = opts.cols; i >= 0; i--) {
-            styles += (opts.namespace + ' [data-col="'+ (i + 1) + '"] { left:' +
-                ((i * opts.widget_base_dimensions[0]) +
-                (i * opts.widget_margins[0]) +
-                ((i + 1) * opts.widget_margins[0])) + 'px;} ');
-        }
-
-        /* generate CSS styles for rows */
-        for (i = opts.rows; i >= 0; i--) {
-            styles += (opts.namespace + ' [data-row="' + (i + 1) + '"] { top:' +
-                ((i * opts.widget_base_dimensions[1]) +
-                (i * opts.widget_margins[1]) +
-                ((i + 1) * opts.widget_margins[1]) ) + 'px;} ');
-        }
-
-        for (var y = 1; y <= opts.rows; y++) {
-            styles += (opts.namespace + ' [data-sizey="' + y + '"] { height:' +
-                (y * opts.widget_base_dimensions[1] +
-                (y - 1) * (opts.widget_margins[1] * 2)) + 'px;}');
-        }
-
-        for (var x = 1; x <= max_size_x; x++) {
-            styles += (opts.namespace + ' [data-sizex="' + x + '"] { width:' +
-                (x * opts.widget_base_dimensions[0] +
-                (x - 1) * (opts.widget_margins[0] * 2)) + 'px;}');
-        }
-
-        return this.add_style_tag(styles);
-    };
-
-
-    /**
-    * Injects the given CSS as string to the head of the document.
-    *
-    * @method add_style_tag
-    * @param {String} css The styles to apply.
-    * @return {Object} Returns the instance of the Gridster class.
-    */
-    fn.add_style_tag = function(css) {
-      var d = document;
-      var tag = d.createElement('style');
-
-      d.getElementsByTagName('head')[0].appendChild(tag);
-      tag.setAttribute('type', 'text/css');
-
-      if (tag.styleSheet) {
-        tag.styleSheet.cssText = css;
-      }else{
-        tag.appendChild(document.createTextNode(css));
-      }
-      return this;
-    };
-
-
-    /**
-    * Generates a faux grid to collide with it when a widget is dragged and
-    * detect row or column that we want to go.
-    *
-    * @method generate_faux_grid
-    * @param {Number} rows Number of columns.
-    * @param {Number} cols Number of rows.
-    * @return {Object} Returns the instance of the Gridster class.
-    */
-    fn.generate_faux_grid = function(rows, cols) {
-        this.faux_grid = [];
-        this.gridmap = [];
-        var col;
-        var row;
-        for (col = cols; col > 0; col--) {
-            this.gridmap[col] = [];
-            for (row = rows; row > 0; row--) {
-                this.add_faux_cell(row, col);
-            }
-        }
-        return this;
-    };
-
-
-    /**
-    * Add cell to the faux grid.
-    *
-    * @method add_faux_cell
-    * @param {Number} row The row for the new faux cell.
-    * @param {Number} col The col for the new faux cell.
-    * @return {Object} Returns the instance of the Gridster class.
-    */
-    fn.add_faux_cell = function(row, col) {
-        var coords = $({
-                        left: this.baseX + ((col - 1) * this.min_widget_width),
-                        top: this.baseY + (row -1) * this.min_widget_height,
-                        width: this.min_widget_width,
-                        height: this.min_widget_height,
-                        col: col,
-                        row: row,
-                        original_col: col,
-                        original_row: row
-                    }).coords();
-
-        if (!$.isArray(this.gridmap[col])) {
-            this.gridmap[col] = [];
-        }
-
-        this.gridmap[col][row] = false;
-        this.faux_grid.push(coords);
-
-        return this;
-    };
-
-
-    /**
-    * Add rows to the faux grid.
-    *
-    * @method add_faux_rows
-    * @param {Number} rows The number of rows you want to add to the faux grid.
-    * @return {Object} Returns the instance of the Gridster class.
-    */
-    fn.add_faux_rows = function(rows) {
-        var actual_rows = this.rows;
-        var max_rows = actual_rows + (rows || 1);
-
-        for (var r = max_rows; r > actual_rows; r--) {
-            for (var c = this.cols; c >= 1; c--) {
-                this.add_faux_cell(r, c);
-            }
-        }
-
-        this.rows = max_rows;
-
-        if (this.options.autogenerate_stylesheet) {
-            this.generate_stylesheet();
-        }
-
-        return this;
-    };
-
-     /**
-    * Add cols to the faux grid.
-    *
-    * @method add_faux_cols
-    * @param {Number} cols The number of cols you want to add to the faux grid.
-    * @return {Object} Returns the instance of the Gridster class.
-    */
-    fn.add_faux_cols = function(cols) {
-        var actual_cols = this.cols;
-        var max_cols = actual_cols + (cols || 1);
-
-        for (var c = actual_cols; c < max_cols; c++) {
-            for (var r = this.rows; r >= 1; r--) {
-                this.add_faux_cell(r, c);
-            }
-        }
-
-        this.cols = max_cols;
-
-        if (this.options.autogenerate_stylesheet) {
-            this.generate_stylesheet();
-        }
-
-        return this;
-    };
-
-
-    /**
-    * Recalculates the offsets for the faux grid. You need to use it when
-    * the browser is resized.
-    *
-    * @method recalculate_faux_grid
-    * @return {Object} Returns the instance of the Gridster class.
-    */
-    fn.recalculate_faux_grid = function() {
-        var aw = this.$wrapper.width();
-        this.baseX = ($(window).width() - aw) / 2;
-        this.baseY = this.$wrapper.offset().top;
-
-        $.each(this.faux_grid, $.proxy(function(i, coords) {
-            this.faux_grid[i] = coords.update({
-                left: this.baseX + (coords.data.col -1) * this.min_widget_width,
-                top: this.baseY + (coords.data.row -1) * this.min_widget_height
-            });
-
-        }, this));
-
-        return this;
-    };
-
-
-    /**
-    * Get all widgets in the DOM and register them.
-    *
-    * @method get_widgets_from_DOM
-    * @return {Object} Returns the instance of the Gridster class.
-    */
-    fn.get_widgets_from_DOM = function() {
-        this.$widgets.each($.proxy(function(i, widget) {
-            this.register_widget($(widget));
-        }, this));
-        return this;
-    };
-
-
-    /**
-    * Calculate columns and rows to be set based on the configuration
-    *  parameters, grid dimensions, etc ...
-    *
-    * @method generate_grid_and_stylesheet
-    * @return {Object} Returns the instance of the Gridster class.
-    */
-    fn.generate_grid_and_stylesheet = function() {
-        var aw = this.$wrapper.width();
-        var ah = this.$wrapper.height();
-
-        var cols = Math.floor(aw / this.min_widget_width) +
-                   this.options.extra_cols;
-
-        var actual_cols = this.$widgets.map(function() {
-            return $(this).attr('data-col');
-        });
-        actual_cols = Array.prototype.slice.call(actual_cols, 0);
-        //needed to pass tests with phantomjs
-        actual_cols.length || (actual_cols = [0]);
-
-        var min_cols = Math.max.apply(Math, actual_cols);
-
-        // get all rows that could be occupied by the current widgets
-        var max_rows = this.options.extra_rows;
-        this.$widgets.each(function(i, w) {
-            max_rows += (+$(w).attr('data-sizey'));
-        });
-
-        this.cols = Math.max(min_cols, cols, this.options.min_cols);
-        this.rows = Math.max(max_rows, this.options.min_rows);
-
-        this.baseX = ($(window).width() - aw) / 2;
-        this.baseY = this.$wrapper.offset().top;
-
-        if (this.options.autogenerate_stylesheet) {
-            this.generate_stylesheet();
-        }
-
-        return this.generate_faux_grid(this.rows, this.cols);
-    };
-
-    /**
-     * Destroy this gridster by removing any sign of its presence, making it easy to avoid memory leaks
-     *
-     * @method destroy
-     * @return {undefined}
-     */
-    fn.destroy = function(){
-        // remove bound callback on window resize
-        $(window).unbind('resize', this.on_window_resize);
-
-        if(this.drag_api){
-            this.drag_api.destroy();
-        }
-        
-        // lastly, remove gridster element
-        // this will additionally cause any data associated to this element to be removed, including this
-        // very gridster instance
-        this.$el.remove();
-    };
-
-
-    //jQuery adapter
-    $.fn.gridster = function(options) {
-     return this.each(function() {
-       if (!$(this).data('gridster')) {
-         $(this).data('gridster', new Gridster( this, options ));
-       }
-     });
-    };
-
-    $.Gridster = fn;
-
-}(jQuery, window, document));
\ No newline at end of file
diff --git a/templates/project/assets/javascripts/gridster/jquery.gridster.min.js b/templates/project/assets/javascripts/gridster/jquery.gridster.min.js
new file mode 100644
index 0000000..ac34904
--- /dev/null
+++ b/templates/project/assets/javascripts/gridster/jquery.gridster.min.js
@@ -0,0 +1,2 @@
+/*! gridster.js - v0.5.1 - 2014-03-26 - * http://gridster.net/ - Copyright (c) 2014 ducksboard; Licensed MIT */ (function(t){function i(i){return i[0]&&t.isPlainObject(i[0])?this.data=i[0]:this.el=i,this.isCoords=!0,this.coords={},this.init(),this}var e=i.prototype;e.init=function(){this.set(),this.original_coords=this.get()},e.set=function(t,i){var e=this.el;if(e&&!t&&(this.data=e.offset(),this.data.width=e.width(),this.data.height=e.height()),e&&t&&!i){var s=e.offset();this.data.top=s.top,this.data.left=s.left}var r=this.data;return r.left===undefined&&(r.left=r.x1),r.top===undefined&&(r.top=r.y1),this.coords.x1=r.left,this.coords.y1=r.top,this.coords.x2=r.left+r.width,this.coords.y2=r.top+r.height,this.coords.cx=r.left+r.width/2,this.coords.cy=r.top+r.height/2,this.coords.width=r.width,this.coords.height=r.height,this.coords.el=e||!1,this},e.update=function(i){if(!i&&!this.el)return this;if(i){var e=t.extend({},this.data,i);return this.data=e,this.set(!0,!0)}return this.set(!0),this},e.get=function(){return this.coords},e.destroy=function(){this.el.removeData("coords"),delete this.el},t.fn.coords=function(){if(this.data("coords"))return this.data("coords");var t=new i(this,arguments[0]);return this.data("coords",t),t}})(jQuery,window,document),function(t,i,e){function s(i,e,s){this.options=t.extend(r,s),this.$element=i,this.last_colliders=[],this.last_colliders_coords=[],this.set_colliders(e),this.init()}var r={colliders_context:e.body,overlapping_region:"C"},o=s.prototype;o.init=function(){this.find_collisions()},o.overlaps=function(t,i){var e=!1,s=!1;return(i.x1>=t.x1&&i.x1<=t.x2||i.x2>=t.x1&&i.x2<=t.x2||t.x1>=i.x1&&t.x2<=i.x2)&&(e=!0),(i.y1>=t.y1&&i.y1<=t.y2||i.y2>=t.y1&&i.y2<=t.y2||t.y1>=i.y1&&t.y2<=i.y2)&&(s=!0),e&&s},o.detect_overlapping_region=function(t,i){var e="",s="";return t.y1>i.cy&&t.y1<i.y2&&(e="N"),t.y2>i.y1&&t.y2<i.cy&&(e="S"),t.x1>i.cx&&t.x1<i.x2&&(s="W"),t.x2>i.x1&&t.x2<i.cx&&(s="E"),e+s||"C"},o.calculate_overlapped_area_coords=function(i,e){var s=Math.max(i.x1,e.x1),r=Math.max(i.y1,e.y1),o=Math.min(i.x2,e.x2),a=Math.min(i.y2,e.y2);return t({left:s,top:r,width:o-s,height:a-r}).coords().get()},o.calculate_overlapped_area=function(t){return t.width*t.height},o.manage_colliders_start_stop=function(i,e,s){for(var r=this.last_colliders_coords,o=0,a=r.length;a>o;o++)-1===t.inArray(r[o],i)&&e.call(this,r[o]);for(var h=0,n=i.length;n>h;h++)-1===t.inArray(i[h],r)&&s.call(this,i[h])},o.find_collisions=function(i){for(var e=this,s=this.options.overlapping_region,r=[],o=[],a=this.colliders||this.$colliders,h=a.length,n=e.$element.coords().update(i||!1).get();h--;){var _=e.$colliders?t(a[h]):a[h],d=_.isCoords?_:_.coords(),l=d.get(),c=e.overlaps(n,l);if(c){var p=e.detect_overlapping_region(n,l);if(p===s||"all"===s){var g=e.calculate_overlapped_area_coords(n,l),u=e.calculate_overlapped_area(g),f={area:u,area_coords:g,region:p,coords:l,player_coords:n,el:_};e.options.on_overlap&&e.options.on_overlap.call(this,f),r.push(d),o.push(f)}}}return(e.options.on_overlap_stop||e.options.on_overlap_start)&&this.manage_colliders_start_stop(r,e.options.on_overlap_start,e.options.on_overlap_stop),this.last_colliders_coords=r,o},o.get_closest_colliders=function(t){var i=this.find_collisions(t);return i.sort(function(t,i){return"C"===t.region&&"C"===i.region?t.coords.y1<i.coords.y1||t.coords.x1<i.coords.x1?-1:1:t.area<i.area?1:1}),i},o.set_colliders=function(i){"string"==typeof i||i instanceof t?this.$colliders=t(i,this.options.colliders_context).not(this.$element):this.colliders=t(i)},t.fn.collision=function(t,i){return new s(this,t,i)}}(jQuery,window,document),function(t){t.delay=function(t,i){var e=Array.prototype.slice.call(arguments,2);return setTimeout(function(){return t.apply(null,e)},i)},t.debounce=function(t,i,e){var s;return function(){var r=this,o=arguments,a=function(){s=null,e||t.apply(r,o)};e&&!s&&t.apply(r,o),clearTimeout(s),s=setTimeout(a,i)}},t.throttle=function(t,i){var e,s,r,o,a,h,n=debounce(function(){a=o=!1},i);return function(){e=this,s=arguments;var _=function(){r=null,a&&t.apply(e,s),n()};return r||(r=setTimeout(_,i)),o?a=!0:h=t.apply(e,s),n(),o=!0,h}}}(window),function(t,i,e){function s(i,s){this.options=t.extend({},r,s),this.$body=t(e.body),this.$container=t(i),this.$dragitems=t(this.options.items,this.$container),this.is_dragging=!1,this.player_min_left=0+this.options.offset_left,this.init()}var r={items:"li",distance:1,limit:!0,offset_left:0,autoscroll:!0,ignore_dragging:["INPUT","TEXTAREA","SELECT","BUTTON"],handle:null,container_width:0,move_element:!0,helper:!1,remove_helper:!0},o=t(i),a={x:"left",y:"top"},h=!!("ontouchstart"in i),n={start:h?"touchstart.gridster-draggable":"mousedown.gridster-draggable",move:h?"touchmove.gridster-draggable":"mousemove.gridster-draggable",end:h?"touchend.gridster-draggable":"mouseup.gridster-draggable"},_=function(t){return t.charAt(0).toUpperCase()+t.slice(1)},d=s.prototype;d.init=function(){var e=this.$container.css("position");this.calculate_dimensions(),this.$container.css("position","static"===e?"relative":e),this.disabled=!1,this.events(),t(i).bind("resize.gridster-draggable",throttle(t.proxy(this.calculate_dimensions,this),200))},d.events=function(){this.$container.on("selectstart.gridster-draggable",t.proxy(this.on_select_start,this)),this.$container.on(n.start,this.options.items,t.proxy(this.drag_handler,this)),this.$body.on(n.end,t.proxy(function(t){this.is_dragging=!1,this.disabled||(this.$body.off(n.move),this.drag_start&&this.on_dragstop(t))},this))},d.get_actual_pos=function(t){var i=t.position();return i},d.get_mouse_pos=function(t){if(h){var i=t.originalEvent;t=i.touches.length?i.touches[0]:i.changedTouches[0]}return{left:t.clientX,top:t.clientY}},d.get_offset=function(t){t.preventDefault();var i=this.get_mouse_pos(t),e=Math.round(i.left-this.mouse_init_pos.left),s=Math.round(i.top-this.mouse_init_pos.top),r=Math.round(this.el_init_offset.left+e-this.baseX+this.scroll_offset_x),o=Math.round(this.el_init_offset.top+s-this.baseY+this.scroll_offset_y);return this.options.limit&&(r>this.player_max_left?r=this.player_max_left:this.player_min_left>r&&(r=this.player_min_left)),{position:{left:r,top:o},pointer:{left:i.left,top:i.top,diff_left:e+this.scroll_offset_x,diff_top:s+this.scroll_offset_y}}},d.get_drag_data=function(t){var i=this.get_offset(t);return i.$player=this.$player,i.$helper=this.helper?this.$helper:this.$player,i},d.set_limits=function(t){return t||(t=this.$container.width()),this.player_max_left=t-this.player_width+-this.options.offset_left,this.options.container_width=t,this},d.scroll_in=function(i,s){var r,h=a[i],n=50,d=30,l="x"===i,c=l?this.window_width:this.window_height,p=l?t(e).width():t(e).height(),g=l?this.$player.width():this.$player.height(),u=o["scroll"+_(h)](),f=u,w=f+c,m=w-n,y=f+n,v=f+s.pointer[h],z=p-c+g;return v>=m&&(r=u+d,z>r&&(o["scroll"+_(h)](r),this["scroll_offset_"+i]+=d)),y>=v&&(r=u-d,r>0&&(o["scroll"+_(h)](r),this["scroll_offset_"+i]-=d)),this},d.manage_scroll=function(t){this.scroll_in("x",t),this.scroll_in("y",t)},d.calculate_dimensions=function(){this.window_height=o.height(),this.window_width=o.width()},d.drag_handler=function(i){if(i.target.nodeName,!this.disabled&&(1===i.which||h)&&!this.ignore_drag(i)){var e=this,s=!0;return this.$player=t(i.currentTarget),this.el_init_pos=this.get_actual_pos(this.$player),this.mouse_init_pos=this.get_mouse_pos(i),this.offsetY=this.mouse_init_pos.top-this.el_init_pos.top,this.$body.on(n.move,function(t){var i=e.get_mouse_pos(t),r=Math.abs(i.left-e.mouse_init_pos.left),o=Math.abs(i.top-e.mouse_init_pos.top);return r>e.options.distance||o>e.options.distance?s?(s=!1,e.on_dragstart.call(e,t),!1):(e.is_dragging===!0&&e.on_dragmove.call(e,t),!1):!1}),h?undefined:!1}},d.on_dragstart=function(t){if(t.preventDefault(),this.is_dragging)return this;this.drag_start=this.is_dragging=!0;var i=this.$container.offset();return this.baseX=Math.round(i.left),this.baseY=Math.round(i.top),this.initial_container_width=this.options.container_width||this.$container.width(),"clone"===this.options.helper?(this.$helper=this.$player.clone().appendTo(this.$container).addClass("helper"),this.helper=!0):this.helper=!1,this.scroll_offset_y=0,this.scroll_offset_x=0,this.el_init_offset=this.$player.offset(),this.player_width=this.$player.width(),this.player_height=this.$player.height(),this.set_limits(this.options.container_width),this.options.start&&this.options.start.call(this.$player,t,this.get_drag_data(t)),!1},d.on_dragmove=function(t){var i=this.get_drag_data(t);this.options.autoscroll&&this.manage_scroll(i),this.options.move_element&&(this.helper?this.$helper:this.$player).css({position:"absolute",left:i.position.left,top:i.position.top});var e=this.last_position||i.position;return i.prev_position=e,this.options.drag&&this.options.drag.call(this.$player,t,i),this.last_position=i.position,!1},d.on_dragstop=function(t){var i=this.get_drag_data(t);return this.drag_start=!1,this.options.stop&&this.options.stop.call(this.$player,t,i),this.helper&&this.options.remove_helper&&this.$helper.remove(),!1},d.on_select_start=function(t){return this.disabled||this.ignore_drag(t)?undefined:!1},d.enable=function(){this.disabled=!1},d.disable=function(){this.disabled=!0},d.destroy=function(){this.disable(),this.$container.off(".gridster-draggable"),this.$body.off(".gridster-draggable"),t(i).off(".gridster-draggable"),t.removeData(this.$container,"drag")},d.ignore_drag=function(i){return this.options.handle?!t(i.target).is(this.options.handle):t.isFunction(this.options.ignore_dragging)?this.options.ignore_dragging(i):t(i.target).is(this.options.ignore_dragging.join(", "))},t.fn.drag=function(t){return new s(this,t)}}(jQuery,window,document),function(t,i,e){function s(i,e){this.options=t.extend(!0,{},r,e),this.$el=t(i),this.$wrapper=this.$el.parent(),this.$widgets=this.$el.children(this.options.widget_selector).addClass("gs-w"),this.widgets=[],this.$changed=t([]),this.wrapper_width=this.$wrapper.width(),this.min_widget_width=2*this.options.widget_margins[0]+this.options.widget_base_dimensions[0],this.min_widget_height=2*this.options.widget_margins[1]+this.options.widget_base_dimensions[1],this.generated_stylesheets=[],this.$style_tags=t([]),this.init()}var r={namespace:"",widget_selector:"li",widget_margins:[10,10],widget_base_dimensions:[400,225],extra_rows:0,extra_cols:0,min_cols:1,max_cols:1/0,min_rows:15,max_size_x:!1,autogrow_cols:!1,autogenerate_stylesheet:!0,avoid_overlapped_widgets:!0,serialize_params:function(t,i){return{col:i.col,row:i.row,size_x:i.size_x,size_y:i.size_y}},collision:{},draggable:{items:".gs-w",distance:4},resize:{enabled:!1,axes:["both"],handle_append_to:"",handle_class:"gs-resize-handle",max_size:[1/0,1/0],min_size:[1,1]}};s.generated_stylesheets=[];var o=s.prototype;o.init=function(){this.options.resize.enabled&&this.setup_resize(),this.generate_grid_and_stylesheet(),this.get_widgets_from_DOM(),this.set_dom_grid_height(),this.set_dom_grid_width(),this.$wrapper.addClass("ready"),this.draggable(),this.options.resize.enabled&&this.resizable(),t(i).bind("resize.gridster",throttle(t.proxy(this.recalculate_faux_grid,this),200))},o.disable=function(){return this.$wrapper.find(".player-revert").removeClass("player-revert"),this.drag_api.disable(),this},o.enable=function(){return this.drag_api.enable(),this},o.disable_resize=function(){return this.$el.addClass("gs-resize-disabled"),this.resize_api.disable(),this},o.enable_resize=function(){return this.$el.removeClass("gs-resize-disabled"),this.resize_api.enable(),this},o.add_widget=function(i,e,s,r,o,a,h){var n;e||(e=1),s||(s=1),!r&!o?n=this.next_position(e,s):(n={col:r,row:o},this.empty_cells(r,o,e,s));var _=t(i).attr({"data-col":n.col,"data-row":n.row,"data-sizex":e,"data-sizey":s}).addClass("gs-w").appendTo(this.$el).hide();return this.$widgets=this.$widgets.add(_),this.register_widget(_),this.add_faux_rows(n.size_y),a&&this.set_widget_max_size(_,a),h&&this.set_widget_min_size(_,h),this.set_dom_grid_width(),this.set_dom_grid_height(),this.drag_api.set_limits(this.cols*this.min_widget_width),_.fadeIn()},o.set_widget_min_size=function(t,i){if(t="number"==typeof t?this.$widgets.eq(t):t,!t.length)return this;var e=t.data("coords").grid;return e.min_size_x=i[0],e.min_size_y=i[1],this},o.set_widget_max_size=function(t,i){if(t="number"==typeof t?this.$widgets.eq(t):t,!t.length)return this;var e=t.data("coords").grid;return e.max_size_x=i[0],e.max_size_y=i[1],this},o.add_resize_handle=function(i){var e=this.options.resize.handle_append_to;return t(this.resize_handle_tpl).appendTo(e?t(e,i):i),this},o.resize_widget=function(t,i,e,s){var r=t.coords().grid,o=r.col,a=this.options.max_cols,h=r.size_y,n=r.col,_=n;i||(i=r.size_x),e||(e=r.size_y),1/0!==a&&(i=Math.min(i,a-o+1)),e>h&&this.add_faux_rows(Math.max(e-h,0));var d=o+i-1;d>this.cols&&this.add_faux_cols(d-this.cols);var l={col:_,row:r.row,size_x:i,size_y:e};return this.mutate_widget_in_gridmap(t,r,l),this.set_dom_grid_height(),this.set_dom_grid_width(),s&&s.call(this,l.size_x,l.size_y),t},o.mutate_widget_in_gridmap=function(i,e,s){e.size_x;var r=e.size_y,o=this.get_cells_occupied(e),a=this.get_cells_occupied(s),h=[];t.each(o.cols,function(i,e){-1===t.inArray(e,a.cols)&&h.push(e)});var n=[];t.each(a.cols,function(i,e){-1===t.inArray(e,o.cols)&&n.push(e)});var _=[];t.each(o.rows,function(i,e){-1===t.inArray(e,a.rows)&&_.push(e)});var d=[];if(t.each(a.rows,function(i,e){-1===t.inArray(e,o.rows)&&d.push(e)}),this.remove_from_gridmap(e),n.length){var l=[s.col,s.row,s.size_x,Math.min(r,s.size_y),i];this.empty_cells.apply(this,l)}if(d.length){var c=[s.col,s.row,s.size_x,s.size_y,i];this.empty_cells.apply(this,c)}if(e.col=s.col,e.row=s.row,e.size_x=s.size_x,e.size_y=s.size_y,this.add_to_gridmap(s,i),i.removeClass("player-revert"),i.data("coords").update({width:s.size_x*this.options.widget_base_dimensions[0]+2*(s.size_x-1)*this.options.widget_margins[0],height:s.size_y*this.options.widget_base_dimensions[1]+2*(s.size_y-1)*this.options.widget_margins[1]}),i.attr({"data-col":s.col,"data-row":s.row,"data-sizex":s.size_x,"data-sizey":s.size_y}),h.length){var p=[h[0],s.row,h.length,Math.min(r,s.size_y),i];this.remove_empty_cells.apply(this,p)}if(_.length){var g=[s.col,s.row,s.size_x,s.size_y,i];this.remove_empty_cells.apply(this,g)}return this.move_widget_up(i),this},o.empty_cells=function(i,e,s,r,o){var a=this.widgets_below({col:i,row:e-r,size_x:s,size_y:r});return a.not(o).each(t.proxy(function(i,s){var o=t(s).coords().grid;if(e+r-1>=o.row){var a=e+r-o.row;this.move_widget_down(t(s),a)}},this)),this.set_dom_grid_height(),this},o.remove_empty_cells=function(i,e,s,r,o){var a=this.widgets_below({col:i,row:e,size_x:s,size_y:r});return a.not(o).each(t.proxy(function(i,e){this.move_widget_up(t(e),r)},this)),this.set_dom_grid_height(),this},o.next_position=function(t,i){t||(t=1),i||(i=1);for(var e,s=this.gridmap,r=s.length,o=[],a=1;r>a;a++){e=s[a].length;for(var h=1;e>=h;h++){var n=this.can_move_to({size_x:t,size_y:i},a,h);n&&o.push({col:a,row:h,size_y:i,size_x:t})}}return o.length?this.sort_by_row_and_col_asc(o)[0]:!1},o.remove_widget=function(i,e,s){var r=i instanceof t?i:t(i),o=r.coords().grid;t.isFunction(e)&&(s=e,e=!1),this.cells_occupied_by_placeholder={},this.$widgets=this.$widgets.not(r);var a=this.widgets_below(r);return this.remove_from_gridmap(o),r.fadeOut(t.proxy(function(){r.remove(),e||a.each(t.proxy(function(i,e){this.move_widget_up(t(e),o.size_y)},this)),this.set_dom_grid_height(),s&&s.call(this,i)},this)),this},o.remove_all_widgets=function(i){return this.$widgets.each(t.proxy(function(t,e){this.remove_widget(e,!0,i)},this)),this},o.serialize=function(i){i||(i=this.$widgets);var e=[];return i.each(t.proxy(function(i,s){e.push(this.options.serialize_params(t(s),t(s).coords().grid))},this)),e},o.serialize_changed=function(){return this.serialize(this.$changed)},o.register_widget=function(i){var e={col:parseInt(i.attr("data-col"),10),row:parseInt(i.attr("data-row"),10),size_x:parseInt(i.attr("data-sizex"),10),size_y:parseInt(i.attr("data-sizey"),10),max_size_x:parseInt(i.attr("data-max-sizex"),10)||!1,max_size_y:parseInt(i.attr("data-max-sizey"),10)||!1,min_size_x:parseInt(i.attr("data-min-sizex"),10)||!1,min_size_y:parseInt(i.attr("data-min-sizey"),10)||!1,el:i};return this.options.avoid_overlapped_widgets&&!this.can_move_to({size_x:e.size_x,size_y:e.size_y},e.col,e.row)&&(t.extend(e,this.next_position(e.size_x,e.size_y)),i.attr({"data-col":e.col,"data-row":e.row,"data-sizex":e.size_x,"data-sizey":e.size_y})),i.data("coords",i.coords()),i.data("coords").grid=e,this.add_to_gridmap(e,i),this.options.resize.enabled&&this.add_resize_handle(i),this},o.update_widget_position=function(t,i){return this.for_each_cell_occupied(t,function(t,e){return this.gridmap[t]?(this.gridmap[t][e]=i,undefined):this}),this},o.remove_from_gridmap=function(t){return this.update_widget_position(t,!1)},o.add_to_gridmap=function(i,e){if(this.update_widget_position(i,e||i.el),i.el){var s=this.widgets_below(i.el);s.each(t.proxy(function(i,e){this.move_widget_up(t(e))},this))}},o.draggable=function(){var i=this,e=t.extend(!0,{},this.options.draggable,{offset_left:this.options.widget_margins[0],offset_top:this.options.widget_margins[1],container_width:this.cols*this.min_widget_width,limit:!0,ignore_dragging:["INPUT","TEXTAREA","SELECT","BUTTON","."+this.options.resize.handle_class],start:function(e,s){i.$widgets.filter(".player-revert").removeClass("player-revert"),i.$player=t(this),i.$helper=t(s.$helper),i.helper=!i.$helper.is(i.$player),i.on_start_drag.call(i,e,s),i.$el.trigger("gridster:dragstart")},stop:function(t,e){i.on_stop_drag.call(i,t,e),i.$el.trigger("gridster:dragstop")},drag:throttle(function(t,e){i.on_drag.call(i,t,e),i.$el.trigger("gridster:drag")},60)});return this.drag_api=this.$el.drag(e),this},o.resizable=function(){return this.resize_api=this.$el.drag({items:"."+this.options.resize.handle_class,offset_left:this.options.widget_margins[0],container_width:this.container_width,move_element:!1,resize:!0,limit:this.options.autogrow_cols?!1:!0,start:t.proxy(this.on_start_resize,this),stop:t.proxy(function(i,e){delay(t.proxy(function(){this.on_stop_resize(i,e)},this),120)},this),drag:throttle(t.proxy(this.on_resize,this),60)}),this},o.setup_resize=function(){this.resize_handle_class=this.options.resize.handle_class;var i=this.options.resize.axes,e='<span class="'+this.resize_handle_class+" "+this.resize_handle_class+'-{type}" />';return this.resize_handle_tpl=t.map(i,function(t){return e.replace("{type}",t)}).join(""),this},o.on_start_drag=function(i,e){this.$helper.add(this.$player).add(this.$wrapper).addClass("dragging"),this.highest_col=this.get_highest_occupied_cell().col,this.$player.addClass("player"),this.player_grid_data=this.$player.coords().grid,this.placeholder_grid_data=t.extend({},this.player_grid_data),this.set_dom_grid_height(this.$el.height()+this.player_grid_data.size_y*this.min_widget_height),this.set_dom_grid_width(this.cols);var s=this.player_grid_data.size_x,r=this.cols-this.highest_col;this.options.autogrow_cols&&s>=r&&this.add_faux_cols(Math.min(s-r,1));var o=this.faux_grid,a=this.$player.data("coords").coords;this.cells_occupied_by_player=this.get_cells_occupied(this.player_grid_data),this.cells_occupied_by_placeholder=this.get_cells_occupied(this.placeholder_grid_data),this.last_cols=[],this.last_rows=[],this.collision_api=this.$helper.collision(o,this.options.collision),this.$preview_holder=t("<"+this.$player.get(0).tagName+" />",{"class":"preview-holder","data-row":this.$player.attr("data-row"),"data-col":this.$player.attr("data-col"),css:{width:a.width,height:a.height}}).appendTo(this.$el),this.options.draggable.start&&this.options.draggable.start.call(this,i,e)},o.on_drag=function(t,i){if(null===this.$player)return!1;var e={left:i.position.left+this.baseX,top:i.position.top+this.baseY};if(this.options.autogrow_cols){var s=this.placeholder_grid_data.col+this.placeholder_grid_data.size_x-1;s>=this.cols-1&&this.options.max_cols>=this.cols+1&&(this.add_faux_cols(1),this.set_dom_grid_width(this.cols+1),this.drag_api.set_limits(this.container_width)),this.collision_api.set_colliders(this.faux_grid)}this.colliders_data=this.collision_api.get_closest_colliders(e),this.on_overlapped_column_change(this.on_start_overlapping_column,this.on_stop_overlapping_column),this.on_overlapped_row_change(this.on_start_overlapping_row,this.on_stop_overlapping_row),this.helper&&this.$player&&this.$player.css({left:i.position.left,top:i.position.top}),this.options.draggable.drag&&this.options.draggable.drag.call(this,t,i)},o.on_stop_drag=function(t,i){this.$helper.add(this.$player).add(this.$wrapper).removeClass("dragging"),i.position.left=i.position.left+this.baseX,i.position.top=i.position.top+this.baseY,this.colliders_data=this.collision_api.get_closest_colliders(i.position),this.on_overlapped_column_change(this.on_start_overlapping_column,this.on_stop_overlapping_column),this.on_overlapped_row_change(this.on_start_overlapping_row,this.on_stop_overlapping_row),this.$player.addClass("player-revert").removeClass("player").attr({"data-col":this.placeholder_grid_data.col,"data-row":this.placeholder_grid_data.row}).css({left:"",top:""}),this.$changed=this.$changed.add(this.$player),this.cells_occupied_by_player=this.get_cells_occupied(this.placeholder_grid_data),this.set_cells_player_occupies(this.placeholder_grid_data.col,this.placeholder_grid_data.row),this.$player.coords().grid.row=this.placeholder_grid_data.row,this.$player.coords().grid.col=this.placeholder_grid_data.col,this.options.draggable.stop&&this.options.draggable.stop.call(this,t,i),this.$preview_holder.remove(),this.$player=null,this.$helper=null,this.placeholder_grid_data={},this.player_grid_data={},this.cells_occupied_by_placeholder={},this.cells_occupied_by_player={},this.set_dom_grid_height(),this.set_dom_grid_width(),this.options.autogrow_cols&&this.drag_api.set_limits(this.cols*this.min_widget_width)},o.on_start_resize=function(i,e){this.$resized_widget=e.$player.closest(".gs-w"),this.resize_coords=this.$resized_widget.coords(),this.resize_wgd=this.resize_coords.grid,this.resize_initial_width=this.resize_coords.coords.width,this.resize_initial_height=this.resize_coords.coords.height,this.resize_initial_sizex=this.resize_coords.grid.size_x,this.resize_initial_sizey=this.resize_coords.grid.size_y,this.resize_initial_col=this.resize_coords.grid.col,this.resize_last_sizex=this.resize_initial_sizex,this.resize_last_sizey=this.resize_initial_sizey,this.resize_max_size_x=Math.min(this.resize_wgd.max_size_x||this.options.resize.max_size[0],this.options.max_cols-this.resize_initial_col+1),this.resize_max_size_y=this.resize_wgd.max_size_y||this.options.resize.max_size[1],this.resize_min_size_x=this.resize_wgd.min_size_x||this.options.resize.min_size[0]||1,this.resize_min_size_y=this.resize_wgd.min_size_y||this.options.resize.min_size[1]||1,this.resize_initial_last_col=this.get_highest_occupied_cell().col,this.set_dom_grid_width(this.cols),this.resize_dir={right:e.$player.is("."+this.resize_handle_class+"-x"),bottom:e.$player.is("."+this.resize_handle_class+"-y")},this.$resized_widget.css({"min-width":this.options.widget_base_dimensions[0],"min-height":this.options.widget_base_dimensions[1]});var s=this.$resized_widget.get(0).tagName;this.$resize_preview_holder=t("<"+s+" />",{"class":"preview-holder resize-preview-holder","data-row":this.$resized_widget.attr("data-row"),"data-col":this.$resized_widget.attr("data-col"),css:{width:this.resize_initial_width,height:this.resize_initial_height}}).appendTo(this.$el),this.$resized_widget.addClass("resizing"),this.options.resize.start&&this.options.resize.start.call(this,i,e,this.$resized_widget),this.$el.trigger("gridster:resizestart")},o.on_stop_resize=function(i,e){this.$resized_widget.removeClass("resizing").css({width:"",height:""}),delay(t.proxy(function(){this.$resize_preview_holder.remove().css({"min-width":"","min-height":""}),this.options.resize.stop&&this.options.resize.stop.call(this,i,e,this.$resized_widget),this.$el.trigger("gridster:resizestop")},this),300),this.set_dom_grid_width(),this.options.autogrow_cols&&this.drag_api.set_limits(this.cols*this.min_widget_width)},o.on_resize=function(t,i){var e,s=i.pointer.diff_left,r=i.pointer.diff_top,o=this.options.widget_base_dimensions[0],a=this.options.widget_base_dimensions[1],h=this.options.widget_margins[0],n=this.options.widget_margins[1],_=this.resize_max_size_x,d=this.resize_min_size_x,l=this.resize_max_size_y,c=this.resize_min_size_y,p=this.options.autogrow_cols,g=1/0,u=1/0,f=Math.ceil(s/(o+2*h)-.2),w=Math.ceil(r/(a+2*n)-.2),m=Math.max(1,this.resize_initial_sizex+f),y=Math.max(1,this.resize_initial_sizey+w),v=this.container_width/this.min_widget_width-this.resize_initial_col+1,z=v*this.min_widget_width-2*h;if(m=Math.max(Math.min(m,_),d),m=Math.min(v,m),e=_*o+2*(m-1)*h,g=Math.min(e,z),min_width=d*o+2*(m-1)*h,y=Math.max(Math.min(y,l),c),u=l*a+2*(y-1)*n,min_height=c*a+2*(y-1)*n,this.resize_dir.right?y=this.resize_initial_sizey:this.resize_dir.bottom&&(m=this.resize_initial_sizex),p){var x=this.resize_initial_col+m-1;p&&x>=this.resize_initial_last_col&&(this.set_dom_grid_width(Math.max(x+1,this.cols)),x>this.cols&&this.add_faux_cols(x-this.cols))}var $={};!this.resize_dir.bottom&&($.width=Math.max(Math.min(this.resize_initial_width+s,g),min_width)),!this.resize_dir.right&&($.height=Math.max(Math.min(this.resize_initial_height+r,u),min_height)),this.$resized_widget.css($),(m!==this.resize_last_sizex||y!==this.resize_last_sizey)&&(this.resize_widget(this.$resized_widget,m,y),this.set_dom_grid_width(this.cols),this.$resize_preview_holder.css({width:"",height:""}).attr({"data-row":this.$resized_widget.attr("data-row"),"data-sizex":m,"data-sizey":y})),this.options.resize.resize&&this.options.resize.resize.call(this,t,i,this.$resized_widget),this.$el.trigger("gridster:resize"),this.resize_last_sizex=m,this.resize_last_sizey=y},o.on_overlapped_column_change=function(i,e){if(!this.colliders_data.length)return this;var s,r=this.get_targeted_columns(this.colliders_data[0].el.data.col),o=this.last_cols.length,a=r.length;for(s=0;a>s;s++)-1===t.inArray(r[s],this.last_cols)&&(i||t.noop).call(this,r[s]);for(s=0;o>s;s++)-1===t.inArray(this.last_cols[s],r)&&(e||t.noop).call(this,this.last_cols[s]);return this.last_cols=r,this},o.on_overlapped_row_change=function(i,e){if(!this.colliders_data.length)return this;var s,r=this.get_targeted_rows(this.colliders_data[0].el.data.row),o=this.last_rows.length,a=r.length;for(s=0;a>s;s++)-1===t.inArray(r[s],this.last_rows)&&(i||t.noop).call(this,r[s]);for(s=0;o>s;s++)-1===t.inArray(this.last_rows[s],r)&&(e||t.noop).call(this,this.last_rows[s]);this.last_rows=r},o.set_player=function(t,i,e){var s=this;e||this.empty_cells_player_occupies();var r=e?{col:t}:s.colliders_data[0].el.data,o=r.col,a=i||r.row;this.player_grid_data={col:o,row:a,size_y:this.player_grid_data.size_y,size_x:this.player_grid_data.size_x},this.cells_occupied_by_player=this.get_cells_occupied(this.player_grid_data);var h=this.get_widgets_overlapped(this.player_grid_data),n=this.widgets_constraints(h);if(this.manage_movements(n.can_go_up,o,a),this.manage_movements(n.can_not_go_up,o,a),!h.length){var _=this.can_go_player_up(this.player_grid_data);_!==!1&&(a=_),this.set_placeholder(o,a)}return{col:o,row:a}},o.widgets_constraints=function(i){var e,s=t([]),r=[],o=[];return i.each(t.proxy(function(i,e){var a=t(e),h=a.coords().grid;this.can_go_widget_up(h)?(s=s.add(a),r.push(h)):o.push(h)},this)),e=i.not(s),{can_go_up:this.sort_by_row_asc(r),can_not_go_up:this.sort_by_row_desc(o)}},o.sort_by_row_asc=function(i){return i=i.sort(function(i,e){return i.row||(i=t(i).coords().grid,e=t(e).coords().grid),i.row>e.row?1:-1})},o.sort_by_row_and_col_asc=function(t){return t=t.sort(function(t,i){return t.row>i.row||t.row===i.row&&t.col>i.col?1:-1})},o.sort_by_col_asc=function(t){return t=t.sort(function(t,i){return t.col>i.col?1:-1})},o.sort_by_row_desc=function(t){return t=t.sort(function(t,i){return t.row+t.size_y<i.row+i.size_y?1:-1})},o.manage_movements=function(i,e,s){return t.each(i,t.proxy(function(t,i){var r=i,o=r.el,a=this.can_go_widget_up(r);if(a)this.move_widget_to(o,a),this.set_placeholder(e,a+r.size_y);else{var h=this.can_go_player_up(this.player_grid_data);if(!h){var n=s+this.player_grid_data.size_y-r.row;this.move_widget_down(o,n),this.set_placeholder(e,s)}}},this)),this},o.is_player=function(t,i){if(i&&!this.gridmap[t])return!1;var e=i?this.gridmap[t][i]:t;return e&&(e.is(this.$player)||e.is(this.$helper))},o.is_player_in=function(i,e){var s=this.cells_occupied_by_player||{};return t.inArray(i,s.cols)>=0&&t.inArray(e,s.rows)>=0},o.is_placeholder_in=function(i,e){var s=this.cells_occupied_by_placeholder||{};return this.is_placeholder_in_col(i)&&t.inArray(e,s.rows)>=0},o.is_placeholder_in_col=function(i){var e=this.cells_occupied_by_placeholder||[];return t.inArray(i,e.cols)>=0},o.is_empty=function(t,i){return this.gridmap[t]!==undefined?this.gridmap[t][i]!==undefined&&this.gridmap[t][i]===!1?!0:!1:!0},o.is_occupied=function(t,i){return this.gridmap[t]?this.gridmap[t][i]?!0:!1:!1},o.is_widget=function(t,i){var e=this.gridmap[t];return e?(e=e[i],e?e:!1):!1},o.is_widget_under_player=function(t,i){return this.is_widget(t,i)?this.is_player_in(t,i):!1},o.get_widgets_under_player=function(i){i||(i=this.cells_occupied_by_player||{cols:[],rows:[]});var e=t([]);return t.each(i.cols,t.proxy(function(s,r){t.each(i.rows,t.proxy(function(t,i){this.is_widget(r,i)&&(e=e.add(this.gridmap[r][i]))},this))},this)),e},o.set_placeholder=function(i,e){var s=t.extend({},this.placeholder_grid_data),r=this.widgets_below({col:s.col,row:s.row,size_y:s.size_y,size_x:s.size_x}),o=i+s.size_x-1;o>this.cols&&(i-=o-i);var a=e>this.placeholder_grid_data.row,h=this.placeholder_grid_data.col!==i;this.placeholder_grid_data.col=i,this.placeholder_grid_data.row=e,this.cells_occupied_by_placeholder=this.get_cells_occupied(this.placeholder_grid_data),this.$preview_holder.attr({"data-row":e,"data-col":i}),(a||h)&&r.each(t.proxy(function(e,r){this.move_widget_up(t(r),this.placeholder_grid_data.col-i+s.size_y)},this));var n=this.get_widgets_under_player(this.cells_occupied_by_placeholder);n.length&&n.each(t.proxy(function(i,r){var o=t(r);this.move_widget_down(o,e+s.size_y-o.data("coords").grid.row)},this))},o.can_go_player_up=function(t){var i=t.row+t.size_y-1,e=!0,s=[],r=1e4,o=this.get_widgets_under_player();return this.for_each_column_occupied(t,function(t){var a=this.gridmap[t],h=i+1;for(s[t]=[];--h>0&&(this.is_empty(t,h)||this.is_player(t,h)||this.is_widget(t,h)&&a[h].is(o));)s[t].push(h),r=r>h?h:r;return 0===s[t].length?(e=!1,!0):(s[t].sort(function(t,i){return t-i}),undefined)}),e?this.get_valid_rows(t,s,r):!1},o.can_go_widget_up=function(t){var i=t.row+t.size_y-1,e=!0,s=[],r=1e4;return this.for_each_column_occupied(t,function(o){var a=this.gridmap[o];s[o]=[];for(var h=i+1;--h>0&&(!this.is_widget(o,h)||this.is_player_in(o,h)||a[h].is(t.el));)this.is_player(o,h)||this.is_placeholder_in(o,h)||this.is_player_in(o,h)||s[o].push(h),r>h&&(r=h);return 0===s[o].length?(e=!1,!0):(s[o].sort(function(t,i){return t-i}),undefined)}),e?this.get_valid_rows(t,s,r):!1},o.get_valid_rows=function(i,e,s){for(var r=i.row,o=i.row+i.size_y-1,a=i.size_y,h=s-1,n=[];o>=++h;){var _=!0;if(t.each(e,function(i,e){t.isArray(e)&&-1===t.inArray(h,e)&&(_=!1)}),_===!0&&(n.push(h),n.length===a))break}var d=!1;return 1===a?n[0]!==r&&(d=n[0]||!1):n[0]!==r&&(d=this.get_consecutive_numbers_index(n,a)),d},o.get_consecutive_numbers_index=function(t,i){for(var e=t.length,s=[],r=!0,o=-1,a=0;e>a;a++){if(r||t[a]===o+1){if(s.push(a),s.length===i)break;r=!1}else s=[],r=!0;o=t[a]}return s.length>=i?t[s[0]]:!1},o.get_widgets_overlapped=function(){var i=t([]),e=[],s=this.cells_occupied_by_player.rows.slice(0);return s.reverse(),t.each(this.cells_occupied_by_player.cols,t.proxy(function(r,o){t.each(s,t.proxy(function(s,r){if(!this.gridmap[o])return!0;var a=this.gridmap[o][r];this.is_occupied(o,r)&&!this.is_player(a)&&-1===t.inArray(a,e)&&(i=i.add(a),e.push(a))
+},this))},this)),i},o.on_start_overlapping_column=function(t){this.set_player(t,!1)},o.on_start_overlapping_row=function(t){this.set_player(!1,t)},o.on_stop_overlapping_column=function(t){this.set_player(t,!1);var i=this;this.for_each_widget_below(t,this.cells_occupied_by_player.rows[0],function(){i.move_widget_up(this,i.player_grid_data.size_y)})},o.on_stop_overlapping_row=function(t){this.set_player(!1,t);for(var i=this,e=this.cells_occupied_by_player.cols,s=0,r=e.length;r>s;s++)this.for_each_widget_below(e[s],t,function(){i.move_widget_up(this,i.player_grid_data.size_y)})},o.move_widget_to=function(i,e){var s=this,r=i.coords().grid;e-r.row;var o=this.widgets_below(i),a=this.can_move_to(r,r.col,e,i);return a===!1?!1:(this.remove_from_gridmap(r),r.row=e,this.add_to_gridmap(r),i.attr("data-row",e),this.$changed=this.$changed.add(i),o.each(function(i,e){var r=t(e),o=r.coords().grid,a=s.can_go_widget_up(o);a&&a!==o.row&&s.move_widget_to(r,a)}),this)},o.move_widget_up=function(i,e){var s=i.coords().grid,r=s.row,o=[];return e||(e=1),this.can_go_up(i)?(this.for_each_column_occupied(s,function(s){if(-1===t.inArray(i,o)){var a=i.coords().grid,h=r-e;if(h=this.can_go_up_to_row(a,s,h),!h)return!0;var n=this.widgets_below(i);this.remove_from_gridmap(a),a.row=h,this.add_to_gridmap(a),i.attr("data-row",a.row),this.$changed=this.$changed.add(i),o.push(i),n.each(t.proxy(function(i,s){this.move_widget_up(t(s),e)},this))}}),undefined):!1},o.move_widget_down=function(i,e){var s,r,o,a;if(0>=e)return!1;if(s=i.coords().grid,r=s.row,o=[],a=e,!i)return!1;if(-1===t.inArray(i,o)){var h=i.coords().grid,n=r+e,_=this.widgets_below(i);this.remove_from_gridmap(h),_.each(t.proxy(function(i,e){var s=t(e),r=s.coords().grid,o=this.displacement_diff(r,h,a);o>0&&this.move_widget_down(s,o)},this)),h.row=n,this.update_widget_position(h,i),i.attr("data-row",h.row),this.$changed=this.$changed.add(i),o.push(i)}},o.can_go_up_to_row=function(i,e,s){var r,o=this.gridmap,a=!0,h=[],n=i.row;if(this.for_each_column_occupied(i,function(t){for(o[t],h[t]=[],r=n;r--&&this.is_empty(t,r)&&!this.is_placeholder_in(t,r);)h[t].push(r);return h[t].length?undefined:(a=!1,!0)}),!a)return!1;for(r=s,r=1;n>r;r++){for(var _=!0,d=0,l=h.length;l>d;d++)h[d]&&-1===t.inArray(r,h[d])&&(_=!1);if(_===!0){a=r;break}}return a},o.displacement_diff=function(t,i,e){var s=t.row,r=[],o=i.row+i.size_y;this.for_each_column_occupied(t,function(t){for(var i=0,e=o;s>e;e++)this.is_empty(t,e)&&(i+=1);r.push(i)});var a=Math.max.apply(Math,r);return e-=a,e>0?e:0},o.widgets_below=function(i){var e=t.isPlainObject(i)?i:i.coords().grid,s=this;this.gridmap;var r=e.row+e.size_y-1,o=t([]);return this.for_each_column_occupied(e,function(i){s.for_each_widget_below(i,r,function(){return s.is_player(this)||-1!==t.inArray(this,o)?undefined:(o=o.add(this),!0)})}),this.sort_by_row_asc(o)},o.set_cells_player_occupies=function(t,i){return this.remove_from_gridmap(this.placeholder_grid_data),this.placeholder_grid_data.col=t,this.placeholder_grid_data.row=i,this.add_to_gridmap(this.placeholder_grid_data,this.$player),this},o.empty_cells_player_occupies=function(){return this.remove_from_gridmap(this.placeholder_grid_data),this},o.can_go_up=function(t){var i=t.coords().grid,e=i.row,s=e-1;this.gridmap;var r=!0;return 1===e?!1:(this.for_each_column_occupied(i,function(t){return this.is_widget(t,s),this.is_occupied(t,s)||this.is_player(t,s)||this.is_placeholder_in(t,s)||this.is_player_in(t,s)?(r=!1,!0):undefined}),r)},o.can_move_to=function(t,i,e,s){this.gridmap;var r=t.el,o={size_y:t.size_y,size_x:t.size_x,col:i,row:e},a=!0,h=i+t.size_x-1;return h>this.cols?!1:s&&e+t.size_y-1>s?!1:(this.for_each_cell_occupied(o,function(i,e){var s=this.is_widget(i,e);!s||t.el&&!s.is(r)||(a=!1)}),a)},o.get_targeted_columns=function(t){for(var i=(t||this.player_grid_data.col)+(this.player_grid_data.size_x-1),e=[],s=t;i>=s;s++)e.push(s);return e},o.get_targeted_rows=function(t){for(var i=(t||this.player_grid_data.row)+(this.player_grid_data.size_y-1),e=[],s=t;i>=s;s++)e.push(s);return e},o.get_cells_occupied=function(i){var e,s={cols:[],rows:[]};for(arguments[1]instanceof t&&(i=arguments[1].coords().grid),e=0;i.size_x>e;e++){var r=i.col+e;s.cols.push(r)}for(e=0;i.size_y>e;e++){var o=i.row+e;s.rows.push(o)}return s},o.for_each_cell_occupied=function(t,i){return this.for_each_column_occupied(t,function(e){this.for_each_row_occupied(t,function(t){i.call(this,e,t)})}),this},o.for_each_column_occupied=function(t,i){for(var e=0;t.size_x>e;e++){var s=t.col+e;i.call(this,s,t)}},o.for_each_row_occupied=function(t,i){for(var e=0;t.size_y>e;e++){var s=t.row+e;i.call(this,s,t)}},o._traversing_widgets=function(i,e,s,r,o){var a=this.gridmap;if(a[s]){var h,n,_=i+"/"+e;if(arguments[2]instanceof t){var d=arguments[2].coords().grid;s=d.col,r=d.row,o=arguments[3]}var l=[],c=r,p={"for_each/above":function(){for(;c--&&!(c>0&&this.is_widget(s,c)&&-1===t.inArray(a[s][c],l)&&(h=o.call(a[s][c],s,c),l.push(a[s][c]),h)););},"for_each/below":function(){for(c=r+1,n=a[s].length;n>c&&(!this.is_widget(s,c)||-1!==t.inArray(a[s][c],l)||(h=o.call(a[s][c],s,c),l.push(a[s][c]),!h));c++);}};p[_]&&p[_].call(this)}},o.for_each_widget_above=function(t,i,e){return this._traversing_widgets("for_each","above",t,i,e),this},o.for_each_widget_below=function(t,i,e){return this._traversing_widgets("for_each","below",t,i,e),this},o.get_highest_occupied_cell=function(){for(var t,i=this.gridmap,e=i[1].length,s=[],r=[],o=i.length-1;o>=1;o--)for(t=e-1;t>=1;t--)if(this.is_widget(o,t)){s.push(t),r.push(o);break}return{col:Math.max.apply(Math,r),row:Math.max.apply(Math,s)}},o.get_widgets_from=function(i,e){this.gridmap;var s=t();return i&&(s=s.add(this.$widgets.filter(function(){var e=t(this).attr("data-col");return e===i||e>i}))),e&&(s=s.add(this.$widgets.filter(function(){var i=t(this).attr("data-row");return i===e||i>e}))),s},o.set_dom_grid_height=function(t){if(t===undefined){var i=this.get_highest_occupied_cell().row;t=i*this.min_widget_height}return this.container_height=t,this.$el.css("height",this.container_height),this},o.set_dom_grid_width=function(t){t===undefined&&(t=this.get_highest_occupied_cell().col);var i=this.options.autogrow_cols?this.options.max_cols:this.cols;return t=Math.min(i,Math.max(t,this.options.min_cols)),this.container_width=t*this.min_widget_width,this.$el.css("width",this.container_width),this},o.generate_stylesheet=function(i){var e,r="",o=this.options.max_size_x||this.cols;i||(i={}),i.cols||(i.cols=this.cols),i.rows||(i.rows=this.rows),i.namespace||(i.namespace=this.options.namespace),i.widget_base_dimensions||(i.widget_base_dimensions=this.options.widget_base_dimensions),i.widget_margins||(i.widget_margins=this.options.widget_margins),i.min_widget_width=2*i.widget_margins[0]+i.widget_base_dimensions[0],i.min_widget_height=2*i.widget_margins[1]+i.widget_base_dimensions[1];var a=t.param(i);if(t.inArray(a,s.generated_stylesheets)>=0)return!1;for(this.generated_stylesheets.push(a),s.generated_stylesheets.push(a),e=i.cols;e>=0;e--)r+=i.namespace+' [data-col="'+(e+1)+'"] { left:'+(e*i.widget_base_dimensions[0]+e*i.widget_margins[0]+(e+1)*i.widget_margins[0])+"px; }\n";for(e=i.rows;e>=0;e--)r+=i.namespace+' [data-row="'+(e+1)+'"] { top:'+(e*i.widget_base_dimensions[1]+e*i.widget_margins[1]+(e+1)*i.widget_margins[1])+"px; }\n";for(var h=1;i.rows>=h;h++)r+=i.namespace+' [data-sizey="'+h+'"] { height:'+(h*i.widget_base_dimensions[1]+(h-1)*2*i.widget_margins[1])+"px; }\n";for(var n=1;o>=n;n++)r+=i.namespace+' [data-sizex="'+n+'"] { width:'+(n*i.widget_base_dimensions[0]+(n-1)*2*i.widget_margins[0])+"px; }\n";return this.add_style_tag(r)},o.add_style_tag=function(t){var i=e,s=i.createElement("style");return i.getElementsByTagName("head")[0].appendChild(s),s.setAttribute("type","text/css"),s.styleSheet?s.styleSheet.cssText=t:s.appendChild(e.createTextNode(t)),this.$style_tags=this.$style_tags.add(s),this},o.remove_style_tags=function(){var i=s.generated_stylesheets,e=this.generated_stylesheets;this.$style_tags.remove(),s.generated_stylesheets=t.map(i,function(i){return-1===t.inArray(i,e)?i:undefined})},o.generate_faux_grid=function(t,i){this.faux_grid=[],this.gridmap=[];var e,s;for(e=i;e>0;e--)for(this.gridmap[e]=[],s=t;s>0;s--)this.add_faux_cell(s,e);return this},o.add_faux_cell=function(i,e){var s=t({left:this.baseX+(e-1)*this.min_widget_width,top:this.baseY+(i-1)*this.min_widget_height,width:this.min_widget_width,height:this.min_widget_height,col:e,row:i,original_col:e,original_row:i}).coords();return t.isArray(this.gridmap[e])||(this.gridmap[e]=[]),this.gridmap[e][i]=!1,this.faux_grid.push(s),this},o.add_faux_rows=function(t){for(var i=this.rows,e=i+(t||1),s=e;s>i;s--)for(var r=this.cols;r>=1;r--)this.add_faux_cell(s,r);return this.rows=e,this.options.autogenerate_stylesheet&&this.generate_stylesheet(),this},o.add_faux_cols=function(t){var i=this.cols,e=i+(t||1);e=Math.min(e,this.options.max_cols);for(var s=i+1;e>=s;s++)for(var r=this.rows;r>=1;r--)this.add_faux_cell(r,s);return this.cols=e,this.options.autogenerate_stylesheet&&this.generate_stylesheet(),this},o.recalculate_faux_grid=function(){var e=this.$wrapper.width();return this.baseX=(t(i).width()-e)/2,this.baseY=this.$wrapper.offset().top,t.each(this.faux_grid,t.proxy(function(t,i){this.faux_grid[t]=i.update({left:this.baseX+(i.data.col-1)*this.min_widget_width,top:this.baseY+(i.data.row-1)*this.min_widget_height})},this)),this},o.get_widgets_from_DOM=function(){return this.$widgets.each(t.proxy(function(i,e){this.register_widget(t(e))},this)),this},o.generate_grid_and_stylesheet=function(){var e=this.$wrapper.width(),s=this.options.max_cols,r=Math.floor(e/this.min_widget_width)+this.options.extra_cols,o=this.$widgets.map(function(){return t(this).attr("data-col")}).get();o.length||(o=[0]);var a=Math.max.apply(Math,o);this.cols=Math.max(a,r,this.options.min_cols),1/0!==s&&s>=a&&this.cols>s&&(this.cols=s);var h=this.options.extra_rows;return this.$widgets.each(function(i,e){h+=+t(e).attr("data-sizey")}),this.rows=Math.max(h,this.options.min_rows),this.baseX=(t(i).width()-e)/2,this.baseY=this.$wrapper.offset().top,this.options.autogenerate_stylesheet&&this.generate_stylesheet(),this.generate_faux_grid(this.rows,this.cols)},o.destroy=function(e){return this.$el.removeData("gridster"),t(i).unbind(".gridster"),this.drag_api&&this.drag_api.destroy(),this.remove_style_tags(),e&&this.$el.remove(),this},t.fn.gridster=function(i){return this.each(function(){t(this).data("gridster")||t(this).data("gridster",new s(this,i))})},t.Gridster=o}(jQuery,window,document);