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bootgrid.js
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/*!
* jQuery Bootgrid v1.3.1 - 09/11/2015
* Copyright (c) 2014-2015 Rafael Staib (http://www.jquery-bootgrid.com)
* Licensed under MIT http://www.opensource.org/licenses/MIT
* surikat patched
*/
;(function ($, window, undefined)
{
/*jshint validthis: true */
"use strict";
// GRID INTERNAL FIELDS
// ====================
var namespace = ".rs.jquery.bootgrid";
// GRID INTERNAL FUNCTIONS
// =====================
function appendRow(row)
{
var that = this;
function exists(item)
{
return that.identifier && item[that.identifier] === row[that.identifier];
}
if (!this.rows.contains(exists))
{
this.rows.push(row);
return true;
}
return false;
}
function findFooterAndHeaderItems(selector)
{
var footer = (this.footer) ? this.footer.find(selector) : $(),
header = (this.header) ? this.header.find(selector) : $();
return $.merge(footer, header);
}
function getParams(context)
{
return (context) ? $.extend({}, this.cachedParams, { ctx: context }) :
this.cachedParams;
}
function getRequest()
{
var request = {
current: this.current,
rowCount: this.rowCount,
sort: this.sortDictionary,
searchPhrase: this.searchPhrase
},
post = this.options.post;
post = ($.isFunction(post)) ? post() : post;
return this.options.requestHandler($.extend(true, request, post));
}
function getCssSelector(css)
{
return "." + $.trim(css).replace(/\s+/gm, ".");
}
function getUrl()
{
var url = this.options.url;
return ($.isFunction(url)) ? url() : url;
}
function init()
{
this.element.trigger("initialize" + namespace);
loadColumns.call(this); // Loads columns from HTML thead tag
this.selection = this.options.selection && this.identifier != null;
loadRows.call(this); // Loads rows from HTML tbody tag if ajax is false
prepareTable.call(this);
renderTableHeader.call(this);
renderSearchField.call(this);
renderActions.call(this);
loadData.call(this);
this.element.trigger("initialized" + namespace);
}
function highlightAppendedRows(rows)
{
if (this.options.highlightRows)
{
// todo: implement
}
}
function isVisible(column)
{
return column.visible;
}
function loadColumns()
{
var that = this,
firstHeadRow = this.element.find("thead > tr").first(),
sorted = false;
/*jshint -W018*/
firstHeadRow.children().each(function ()
{
var $this = $(this),
data = $this.data(),
column = {
id: data.columnId,
identifier: that.identifier == null && data.identifier || false,
converter: that.options.converters[data.converter || data.type] || that.options.converters["string"],
text: $this.text(),
html: $this.html(), //surikat patch to allow html in headers (search column.html)
align: data.align || "left",
headerAlign: data.headerAlign || "left",
cssClass: data.cssClass || "",
headerCssClass: data.headerCssClass || "",
formatter: that.options.formatters[data.formatter] || null,
order: (!sorted && (data.order === "asc" || data.order === "desc")) ? data.order : null,
searchable: !(data.searchable === false), // default: true
sortable: !(data.sortable === false), // default: true
visible: !(data.visible === false), // default: true
visibleInSelection: !(data.visibleInSelection === false), // default: true
width: ($.isNumeric(data.width)) ? data.width + "px" :
(typeof(data.width) === "string") ? data.width : null,
data: data //surikat patch to get more params
};
that.columns.push(column);
if (column.order != null)
{
that.sortDictionary[column.id] = column.order;
}
// Prevents multiple identifiers
if (column.identifier)
{
that.identifier = column.id;
that.converter = column.converter;
}
// ensures that only the first order will be applied in case of multi sorting is disabled
if (!that.options.multiSort && column.order !== null)
{
sorted = true;
}
});
/*jshint +W018*/
}
/*
response = {
current: 1,
rowCount: 10,
rows: [{}, {}],
sort: [{ "columnId": "asc" }],
total: 101
}
*/
function loadData()
{
var that = this;
this.element._bgBusyAria(true).trigger("load" + namespace);
showLoading.call(this);
function containsPhrase(row)
{
var column,
searchPattern = new RegExp(that.searchPhrase, (that.options.caseSensitive) ? "g" : "gi");
for (var i = 0; i < that.columns.length; i++)
{
column = that.columns[i];
if (column.searchable && column.visible &&
column.converter.to(row[column.id]).search(searchPattern) > -1)
{
return true;
}
}
return false;
}
function update(rows, total)
{
that.currentRows = rows;
setTotals.call(that, total);
if (!that.options.keepSelection)
{
that.selectedRows = [];
}
renderRows.call(that, rows);
renderInfos.call(that);
renderPagination.call(that);
that.element._bgBusyAria(false).trigger("loaded" + namespace);
}
if (this.options.ajax)
{
var request = getRequest.call(this),
url = getUrl.call(this);
if (url == null || typeof url !== "string" || url.length === 0)
{
throw new Error("Url setting must be a none empty string or a function that returns one.");
}
// aborts the previous ajax request if not already finished or failed
if (this.xqr)
{
this.xqr.abort();
}
var settings = {
url: url,
data: request,
success: function(response)
{
that.xqr = null;
if (typeof (response) === "string")
{
response = $.parseJSON(response);
}
response = that.options.responseHandler(response);
that.current = response.current;
update(response.rows, response.total);
},
error: function (jqXHR, textStatus, errorThrown)
{
that.xqr = null;
if (textStatus !== "abort")
{
renderNoResultsRow.call(that); // overrides loading mask
that.element._bgBusyAria(false).trigger("loaded" + namespace);
}
}
};
settings = $.extend(this.options.ajaxSettings, settings);
this.xqr = $.ajax(settings);
}
else
{
var rows = (this.searchPhrase.length > 0) ? this.rows.where(containsPhrase) : this.rows,
total = rows.length;
if (this.rowCount !== -1)
{
rows = rows.page(this.current, this.rowCount);
}
// todo: improve the following comment
// setTimeout decouples the initialization so that adding event handlers happens before
window.setTimeout(function () { update(rows, total); }, 10);
}
}
function loadRows()
{
if (!this.options.ajax)
{
var that = this,
rows = this.element.find("tbody > tr");
rows.each(function ()
{
var $this = $(this),
cells = $this.children("td"),
row = {};
$.each(that.columns, function (i, column)
{
row[column.id] = column.converter.from(cells.eq(i).text());
});
appendRow.call(that, row);
});
setTotals.call(this, this.rows.length);
sortRows.call(this);
}
}
function setTotals(total)
{
this.total = total;
this.totalPages = (this.rowCount === -1) ? 1 :
Math.ceil(this.total / this.rowCount);
}
function prepareTable()
{
var tpl = this.options.templates,
wrapper = (this.element.parent().hasClass(this.options.css.responsiveTable)) ?
this.element.parent() : this.element;
this.element.addClass(this.options.css.table);
// checks whether there is an tbody element; otherwise creates one
if (this.element.children("tbody").length === 0)
{
this.element.append(tpl.body);
}
if (this.options.navigation & 1)
{
this.header = $(tpl.header.resolve(getParams.call(this, { id: this.element._bgId() + "-header" })));
wrapper.before(this.header);
}
if (this.options.navigation & 2)
{
this.footer = $(tpl.footer.resolve(getParams.call(this, { id: this.element._bgId() + "-footer" })));
wrapper.after(this.footer);
}
}
function renderActions()
{
if (this.options.navigation !== 0)
{
var css = this.options.css,
selector = getCssSelector(css.actions),
actionItems = findFooterAndHeaderItems.call(this, selector);
if (actionItems.length > 0)
{
var that = this,
tpl = this.options.templates,
actions = $(tpl.actions.resolve(getParams.call(this)));
// Refresh Button
if (this.options.ajax)
{
var refreshIcon = tpl.icon.resolve(getParams.call(this, { iconCss: css.iconRefresh })),
refresh = $(tpl.actionButton.resolve(getParams.call(this,
{ content: refreshIcon, text: this.options.labels.refresh })))
.on("click" + namespace, function (e)
{
// todo: prevent multiple fast clicks (fast click detection)
e.stopPropagation();
that.current = 1;
loadData.call(that);
});
actions.append(refresh);
}
// Row count selection
renderRowCountSelection.call(this, actions);
// Column selection
renderColumnSelection.call(this, actions);
replacePlaceHolder.call(this, actionItems, actions);
}
}
}
function renderColumnSelection(actions)
{
if (this.options.columnSelection && this.columns.length > 1)
{
var that = this,
css = this.options.css,
tpl = this.options.templates,
icon = tpl.icon.resolve(getParams.call(this, { iconCss: css.iconColumns })),
dropDown = $(tpl.actionDropDown.resolve(getParams.call(this, { content: icon }))),
selector = getCssSelector(css.dropDownItem),
checkboxSelector = getCssSelector(css.dropDownItemCheckbox),
itemsSelector = getCssSelector(css.dropDownMenuItems);
$.each(this.columns, function (i, column)
{
if (column.visibleInSelection)
{
var item = $(tpl.actionDropDownCheckboxItem.resolve(getParams.call(that,
{ name: column.id, label: column.text, checked: column.visible })))
.on("click" + namespace, selector, function (e)
{
e.stopPropagation();
var $this = $(this),
checkbox = $this.find(checkboxSelector);
if (!checkbox.prop("disabled"))
{
column.visible = checkbox.prop("checked");
var enable = that.columns.where(isVisible).length > 1;
$this.parents(itemsSelector).find(selector + ":has(" + checkboxSelector + ":checked)")
._bgEnableAria(enable).find(checkboxSelector)._bgEnableField(enable);
that.element.find("tbody").empty(); // Fixes an column visualization bug
renderTableHeader.call(that);
loadData.call(that);
}
});
dropDown.find(getCssSelector(css.dropDownMenuItems)).append(item);
}
});
actions.append(dropDown);
}
}
function renderInfos()
{
if (this.options.navigation !== 0)
{
var selector = getCssSelector(this.options.css.infos),
infoItems = findFooterAndHeaderItems.call(this, selector);
if (infoItems.length > 0)
{
var end = (this.current * this.rowCount),
infos = $(this.options.templates.infos.resolve(getParams.call(this, {
end: (this.total === 0 || end === -1 || end > this.total) ? this.total : end,
start: (this.total === 0) ? 0 : (end - this.rowCount + 1),
total: this.total
})));
replacePlaceHolder.call(this, infoItems, infos);
}
}
}
function renderNoResultsRow()
{
var tbody = this.element.children("tbody").first(),
tpl = this.options.templates,
count = this.columns.where(isVisible).length;
if (this.selection)
{
count = count + 1;
}
tbody.html(tpl.noResults.resolve(getParams.call(this, { columns: count })));
}
function renderPagination()
{
if (this.options.navigation !== 0)
{
var selector = getCssSelector(this.options.css.pagination),
paginationItems = findFooterAndHeaderItems.call(this, selector)._bgShowAria(this.rowCount !== -1);
if (this.rowCount !== -1 && paginationItems.length > 0)
{
var tpl = this.options.templates,
current = this.current,
totalPages = this.totalPages,
pagination = $(tpl.pagination.resolve(getParams.call(this))),
offsetRight = totalPages - current,
offsetLeft = (this.options.padding - current) * -1,
startWith = ((offsetRight >= this.options.padding) ?
Math.max(offsetLeft, 1) :
Math.max((offsetLeft - this.options.padding + offsetRight), 1)),
maxCount = this.options.padding * 2 + 1,
count = (totalPages >= maxCount) ? maxCount : totalPages;
renderPaginationItem.call(this, pagination, "first", "«", "first")
._bgEnableAria(current > 1);
renderPaginationItem.call(this, pagination, "prev", "<", "prev")
._bgEnableAria(current > 1);
for (var i = 0; i < count; i++)
{
var pos = i + startWith;
renderPaginationItem.call(this, pagination, pos, pos, "page-" + pos)
._bgEnableAria()._bgSelectAria(pos === current);
}
if (count === 0)
{
renderPaginationItem.call(this, pagination, 1, 1, "page-" + 1)
._bgEnableAria(false)._bgSelectAria();
}
renderPaginationItem.call(this, pagination, "next", ">", "next")
._bgEnableAria(totalPages > current);
renderPaginationItem.call(this, pagination, "last", "»", "last")
._bgEnableAria(totalPages > current);
replacePlaceHolder.call(this, paginationItems, pagination);
}
}
}
function renderPaginationItem(list, page, text, markerCss)
{
var that = this,
tpl = this.options.templates,
css = this.options.css,
values = getParams.call(this, { css: markerCss, text: text, page: page }),
item = $(tpl.paginationItem.resolve(values))
.on("click" + namespace, getCssSelector(css.paginationButton), function (e)
{
e.stopPropagation();
e.preventDefault();
var $this = $(this),
parent = $this.parent();
if (!parent.hasClass("active") && !parent.hasClass("disabled"))
{
var commandList = {
first: 1,
prev: that.current - 1,
next: that.current + 1,
last: that.totalPages
};
var command = $this.data("page");
that.current = commandList[command] || command;
loadData.call(that);
}
$this.trigger("blur");
});
list.append(item);
return item;
}
function renderRowCountSelection(actions)
{
var that = this,
rowCountList = this.options.rowCount;
function getText(value)
{
return (value === -1) ? that.options.labels.all : value;
}
if ($.isArray(rowCountList))
{
var css = this.options.css,
tpl = this.options.templates,
dropDown = $(tpl.actionDropDown.resolve(getParams.call(this, { content: getText(this.rowCount) }))),
menuSelector = getCssSelector(css.dropDownMenu),
menuTextSelector = getCssSelector(css.dropDownMenuText),
menuItemsSelector = getCssSelector(css.dropDownMenuItems),
menuItemSelector = getCssSelector(css.dropDownItemButton);
$.each(rowCountList, function (index, value)
{
var item = $(tpl.actionDropDownItem.resolve(getParams.call(that,
{ text: getText(value), action: value })))
._bgSelectAria(value === that.rowCount)
.on("click" + namespace, menuItemSelector, function (e)
{
e.preventDefault();
var $this = $(this),
newRowCount = $this.data("action");
if (newRowCount !== that.rowCount)
{
// todo: sophisticated solution needed for calculating which page is selected
that.current = 1; // that.rowCount === -1 ---> All
that.rowCount = newRowCount;
$this.parents(menuItemsSelector).children().each(function ()
{
var $item = $(this),
currentRowCount = $item.find(menuItemSelector).data("action");
$item._bgSelectAria(currentRowCount === newRowCount);
});
$this.parents(menuSelector).find(menuTextSelector).text(getText(newRowCount));
loadData.call(that);
}
});
dropDown.find(menuItemsSelector).append(item);
});
actions.append(dropDown);
}
}
function renderRows(rows)
{
if (rows.length > 0)
{
var that = this,
css = this.options.css,
tpl = this.options.templates,
tbody = this.element.children("tbody").first(),
allRowsSelected = true,
html = "";
$.each(rows, function (index, row)
{
var cells = "",
rowAttr = " data-row-id=\"" + ((that.identifier == null) ? index : row[that.identifier]) + "\"",
rowCss = "";
if (that.selection)
{
var selected = ($.inArray(row[that.identifier], that.selectedRows) !== -1),
selectBox = tpl.select.resolve(getParams.call(that,
{ type: "checkbox", value: row[that.identifier], checked: selected }));
cells += tpl.cell.resolve(getParams.call(that, { content: selectBox, css: css.selectCell }));
allRowsSelected = (allRowsSelected && selected);
if (selected)
{
rowCss += css.selected;
rowAttr += " aria-selected=\"true\"";
}
}
var status = row.status != null && that.options.statusMapping[row.status];
if (status)
{
rowCss += status;
}
$.each(that.columns, function (j, column)
{
if (column.visible)
{
var value = ($.isFunction(column.formatter)) ?
column.formatter.call(that, column, row) :
column.converter.to(row[column.id]),
cssClass = (column.cssClass.length > 0) ? " " + column.cssClass : "";
cells += tpl.cell.resolve(getParams.call(that, {
content: (value == null || value === "") ? " " : value,
css: ((column.align === "right") ? css.right : (column.align === "center") ?
css.center : css.left) + cssClass,
style: (column.width == null) ? "" : "width:" + column.width + ";" }));
}
});
if (rowCss.length > 0)
{
rowAttr += " class=\"" + rowCss + "\"";
}
html += tpl.row.resolve(getParams.call(that, { attr: rowAttr, cells: cells }));
});
// sets or clears multi selectbox state
that.element.find("thead " + getCssSelector(that.options.css.selectBox))
.prop("checked", allRowsSelected);
tbody.html(html);
registerRowEvents.call(this, tbody);
}
else
{
renderNoResultsRow.call(this);
}
}
function registerRowEvents(tbody)
{
var that = this,
selectBoxSelector = getCssSelector(this.options.css.selectBox);
if (this.selection)
{
tbody.off("click" + namespace, selectBoxSelector)
.on("click" + namespace, selectBoxSelector, function(e)
{
e.stopPropagation();
var $this = $(this),
id = that.converter.from($this.val());
if ($this.prop("checked"))
{
that.select([id]);
}
else
{
that.deselect([id]);
}
});
}
tbody.off("click" + namespace, "> tr")
.on("click" + namespace, "> tr", function(e)
{
e.stopPropagation();
var $this = $(this),
id = (that.identifier == null) ? $this.data("row-id") :
that.converter.from($this.data("row-id") + ""),
row = (that.identifier == null) ? that.currentRows[id] :
that.currentRows.first(function (item) { return item[that.identifier] === id; });
if (that.selection && that.options.rowSelect)
{
if ($this.hasClass(that.options.css.selected))
{
that.deselect([id]);
}
else
{
that.select([id]);
}
}
that.element.trigger("click" + namespace, [that.columns, row]);
});
}
function renderSearchField()
{
if (this.options.navigation !== 0)
{
var css = this.options.css,
selector = getCssSelector(css.search),
searchItems = findFooterAndHeaderItems.call(this, selector);
if (searchItems.length > 0)
{
var that = this,
tpl = this.options.templates,
timer = null, // fast keyup detection
currentValue = "",
searchFieldSelector = getCssSelector(css.searchField),
search = $(tpl.search.resolve(getParams.call(this))),
searchField = (search.is(searchFieldSelector)) ? search :
search.find(searchFieldSelector);
searchField.on("keyup" + namespace, function (e)
{
e.stopPropagation();
var newValue = $(this).val();
if (currentValue !== newValue || (e.which === 13 && newValue !== ""))
{
currentValue = newValue;
if (e.which === 13 || newValue.length === 0 || newValue.length >= that.options.searchSettings.characters)
{
window.clearTimeout(timer);
timer = window.setTimeout(function ()
{
executeSearch.call(that, newValue);
}, that.options.searchSettings.delay);
}
}
});
replacePlaceHolder.call(this, searchItems, search);
}
}
}
function executeSearch(phrase)
{
if (this.searchPhrase !== phrase)
{
this.current = 1;
this.searchPhrase = phrase;
loadData.call(this);
}
}
function renderTableHeader()
{
var that = this,
headerRow = this.element.find("thead > tr"),
css = this.options.css,
tpl = this.options.templates,
html = "",
sorting = this.options.sorting;
if (this.selection)
{
var selectBox = (this.options.multiSelect) ?
tpl.select.resolve(getParams.call(that, { type: "checkbox", value: "all" })) : "";
html += tpl.rawHeaderCell.resolve(getParams.call(that, { content: selectBox,
css: css.selectCell }));
}
$.each(this.columns, function (index, column)
{
if (column.visible)
{
var sortOrder = that.sortDictionary[column.id],
iconCss = ((sorting && sortOrder && sortOrder === "asc") ? css.iconUp :
(sorting && sortOrder && sortOrder === "desc") ? css.iconDown : ""),
icon = tpl.icon.resolve(getParams.call(that, { iconCss: iconCss })),
align = column.headerAlign,
cssClass = (column.headerCssClass.length > 0) ? " " + column.headerCssClass : "";
html += tpl.headerCell.resolve(getParams.call(that, {
column: column, icon: icon, sortable: sorting && column.sortable && css.sortable || "",
css: ((align === "right") ? css.right : (align === "center") ?
css.center : css.left) + cssClass,
style: (column.width == null) ? "" : "width:" + column.width + ";",
handler: column.data.formatter?(column.data.formatter=='combine'?column.data.combine:column.data.formatter):'' //surikat couple handler on th
}));
}
});
headerRow.html(html);
if (sorting)
{
var sortingSelector = getCssSelector(css.sortable);
headerRow.off("click" + namespace, sortingSelector)
.on("click" + namespace, sortingSelector, function (e)
{
if(e.target.nodeName=='INPUT'){ //surikat patch to allow checkbox in "table > thead th"
//surikat addon to trigger checking on each row
var clicked = $(e.target);
if(clicked.is(':checkbox')){
var i = clicked.closest('th').index();
var checkState;
if(clicked.prop('checked')){
checkState = ':not(:checked)';
}
else{
checkState = ':checked';
}
clicked.closest('table').find('> tbody > tr').each(function(){
$(this).find('> td').eq(i).find('input:checkbox'+checkState).trigger('click');
});
}
return;
}
e.preventDefault();
setTableHeaderSortDirection.call(that, $(this));
sortRows.call(that);
loadData.call(that);
});
}
// todo: create a own function for that piece of code
if (this.selection && this.options.multiSelect)
{
var selectBoxSelector = getCssSelector(css.selectBox);
headerRow.off("click" + namespace, selectBoxSelector)
.on("click" + namespace, selectBoxSelector, function(e)
{
e.stopPropagation();
if ($(this).prop("checked"))
{
that.select();
}
else
{
that.deselect();
}
});
}
}
function setTableHeaderSortDirection(element)
{
var css = this.options.css,
iconSelector = getCssSelector(css.icon),
columnId = element.data("column-id") || element.parents("th").first().data("column-id"),
sortOrder = this.sortDictionary[columnId],
icon = element.find(iconSelector);
if (!this.options.multiSort)
{
element.parents("tr").first().find(iconSelector).removeClass(css.iconDown + " " + css.iconUp);
this.sortDictionary = {};
}
if (sortOrder && sortOrder === "asc")
{
this.sortDictionary[columnId] = "desc";
icon.removeClass(css.iconUp).addClass(css.iconDown);
}
else if (sortOrder && sortOrder === "desc")
{
if (this.options.multiSort)
{
var newSort = {};
for (var key in this.sortDictionary)
{
if (key !== columnId)
{
newSort[key] = this.sortDictionary[key];
}
}
this.sortDictionary = newSort;
icon.removeClass(css.iconDown);
}
else
{
this.sortDictionary[columnId] = "asc";
icon.removeClass(css.iconDown).addClass(css.iconUp);
}
}
else
{
this.sortDictionary[columnId] = "asc";
icon.addClass(css.iconUp);
}
}
function replacePlaceHolder(placeholder, element)
{
placeholder.each(function (index, item)
{
// todo: check how append is implemented. Perhaps cloning here is superfluous.
$(item).before(element.clone(true)).remove();
});
}
function showLoading()
{
var that = this;
window.setTimeout(function()
{
if (that.element._bgAria("busy") === "true")
{
var tpl = that.options.templates,
thead = that.element.children("thead").first(),
tbody = that.element.children("tbody").first(),
firstCell = tbody.find("tr > td").first(),
padding = (that.element.height() - thead.height()) - (firstCell.height() + 20),
count = that.columns.where(isVisible).length;
if (that.selection)
{
count = count + 1;
}
tbody.html(tpl.loading.resolve(getParams.call(that, { columns: count })));
if (that.rowCount !== -1 && padding > 0)
{
tbody.find("tr > td").css("padding", "20px 0 " + padding + "px");
}
}
}, 250);
}
function sortRows()
{
var sortArray = [];
function sort(x, y, current)
{
current = current || 0;
var next = current + 1,
item = sortArray[current];
function sortOrder(value)
{
return (item.order === "asc") ? value : value * -1;
}
return (x[item.id] > y[item.id]) ? sortOrder(1) :
(x[item.id] < y[item.id]) ? sortOrder(-1) :
(sortArray.length > next) ? sort(x, y, next) : 0;
}
if (!this.options.ajax)
{
var that = this;
for (var key in this.sortDictionary)
{
if (this.options.multiSort || sortArray.length === 0)
{
sortArray.push({
id: key,
order: this.sortDictionary[key]
});
}
}
if (sortArray.length > 0)
{
this.rows.sort(sort);
}
}
}
// GRID PUBLIC CLASS DEFINITION
// ====================
/**
* Represents the jQuery Bootgrid plugin.
*
* @class Grid
* @constructor
* @param element {Object} The corresponding DOM element.
* @param options {Object} The options to override default settings.
* @chainable
**/
var Grid = function(element, options)
{
this.element = $(element);
this.origin = this.element.clone();
this.options = $.extend(true, {}, Grid.defaults, this.element.data(), options);
// overrides rowCount explicitly because deep copy ($.extend) leads to strange behaviour