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jquery.jtable.paging.js
595 lines (495 loc) · 25.2 KB
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jquery.jtable.paging.js
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/************************************************************************
* PAGING extension for jTable *
*************************************************************************/
(function ($) {
//Reference to base object members
var base = {
load: $.hik.jtable.prototype.load,
_create: $.hik.jtable.prototype._create,
_setOption: $.hik.jtable.prototype._setOption,
_createRecordLoadUrl: $.hik.jtable.prototype._createRecordLoadUrl,
_createJtParamsForLoading: $.hik.jtable.prototype._createJtParamsForLoading,
_addRowToTable: $.hik.jtable.prototype._addRowToTable,
_addRow: $.hik.jtable.prototype._addRow,
_removeRowsFromTable: $.hik.jtable.prototype._removeRowsFromTable,
_onRecordsLoaded: $.hik.jtable.prototype._onRecordsLoaded
};
//extension members
$.extend(true, $.hik.jtable.prototype, {
/************************************************************************
* DEFAULT OPTIONS / EVENTS *
*************************************************************************/
options: {
paging: false,
pageList: 'normal', //possible values: 'minimal', 'normal'
pageSize: 10,
pageSizes: [10, 25, 50, 100, 250, 500],
pageSizeChangeArea: true,
gotoPageArea: 'combobox', //possible values: 'textbox', 'combobox', 'none'
messages: {
pagingInfo: 'Showing {0}-{1} of {2}',
pageSizeChangeLabel: 'Row count',
gotoPageLabel: 'Go to page'
}
},
/************************************************************************
* PRIVATE FIELDS *
*************************************************************************/
_$bottomPanel: null, //Reference to the panel at the bottom of the table (jQuery object)
_$pagingListArea: null, //Reference to the page list area in to bottom panel (jQuery object)
_$pageSizeChangeArea: null, //Reference to the page size change area in to bottom panel (jQuery object)
_$pageInfoSpan: null, //Reference to the paging info area in to bottom panel (jQuery object)
_$gotoPageArea: null, //Reference to 'Go to page' input area in to bottom panel (jQuery object)
_$gotoPageInput: null, //Reference to 'Go to page' input in to bottom panel (jQuery object)
_totalRecordCount: 0, //Total count of records on all pages
_currentPageNo: 1, //Current page number
/************************************************************************
* CONSTRUCTOR AND INITIALIZING METHODS *
*************************************************************************/
/* Overrides base method to do paging-specific constructions.
*************************************************************************/
_create: function() {
base._create.apply(this, arguments);
if (this.options.paging) {
this._loadPagingSettings();
this._createBottomPanel();
this._createPageListArea();
this._createGotoPageInput();
this._createPageSizeSelection();
}
},
/* Loads user preferences for paging.
*************************************************************************/
_loadPagingSettings: function() {
if (!this.options.saveUserPreferences) {
return;
}
var pageSize = this._getCookie('page-size');
if (pageSize) {
this.options.pageSize = this._normalizeNumber(pageSize, 1, 1000000, this.options.pageSize);
}
},
/* Creates bottom panel and adds to the page.
*************************************************************************/
_createBottomPanel: function() {
this._$bottomPanel = $('<div />')
.addClass('jtable-bottom-panel')
.insertAfter(this._$table);
this._jqueryuiThemeAddClass(this._$bottomPanel, 'ui-state-default');
$('<div />').addClass('jtable-left-area').appendTo(this._$bottomPanel);
$('<div />').addClass('jtable-right-area').appendTo(this._$bottomPanel);
},
/* Creates page list area.
*************************************************************************/
_createPageListArea: function() {
this._$pagingListArea = $('<span></span>')
.addClass('jtable-page-list')
.appendTo(this._$bottomPanel.find('.jtable-left-area'));
this._$pageInfoSpan = $('<span></span>')
.addClass('jtable-page-info')
.appendTo(this._$bottomPanel.find('.jtable-right-area'));
},
/* Creates page list change area.
*************************************************************************/
_createPageSizeSelection: function() {
var self = this;
if (!self.options.pageSizeChangeArea) {
return;
}
//Add current page size to page sizes list if not contains it
if (self._findIndexInArray(self.options.pageSize, self.options.pageSizes) < 0) {
self.options.pageSizes.push(parseInt(self.options.pageSize));
self.options.pageSizes.sort(function(a, b) { return a - b; });
}
//Add a span to contain page size change items
self._$pageSizeChangeArea = $('<span></span>')
.addClass('jtable-page-size-change')
.appendTo(self._$bottomPanel.find('.jtable-left-area'));
//Page size label
self._$pageSizeChangeArea.append('<span>' + self.options.messages.pageSizeChangeLabel + ': </span>');
//Page size change combobox
var $pageSizeChangeCombobox = $('<select></select>').appendTo(self._$pageSizeChangeArea);
//Add page sizes to the combobox
for (var i = 0; i < self.options.pageSizes.length; i++) {
$pageSizeChangeCombobox.append('<option value="' + self.options.pageSizes[i] + '">' + self.options.pageSizes[i] + '</option>');
}
//Select current page size
$pageSizeChangeCombobox.val(self.options.pageSize);
//Change page size on combobox change
$pageSizeChangeCombobox.change(function() {
self._changePageSize(parseInt($(this).val()));
});
},
/* Creates go to page area.
*************************************************************************/
_createGotoPageInput: function() {
var self = this;
if (!self.options.gotoPageArea || self.options.gotoPageArea == 'none') {
return;
}
//Add a span to contain goto page items
this._$gotoPageArea = $('<span></span>')
.addClass('jtable-goto-page')
.appendTo(self._$bottomPanel.find('.jtable-left-area'));
//Goto page label
this._$gotoPageArea.append('<span>' + self.options.messages.gotoPageLabel + ': </span>');
//Goto page input
if (self.options.gotoPageArea == 'combobox') {
self._$gotoPageInput = $('<select></select>')
.appendTo(this._$gotoPageArea)
.data('pageCount', 1)
.change(function() {
self._changePage(parseInt($(this).val()));
});
self._$gotoPageInput.append('<option value="1">1</option>');
} else { //textbox
self._$gotoPageInput = $('<input type="text" maxlength="10" value="' + self._currentPageNo + '" />')
.appendTo(this._$gotoPageArea)
.keypress(function(event) {
if (event.which == 13) { //enter
event.preventDefault();
self._changePage(parseInt(self._$gotoPageInput.val()));
} else if (event.which == 43) { // +
event.preventDefault();
self._changePage(parseInt(self._$gotoPageInput.val()) + 1);
} else if (event.which == 45) { // -
event.preventDefault();
self._changePage(parseInt(self._$gotoPageInput.val()) - 1);
} else {
//Allow only digits
var isValid = (
(47 < event.keyCode && event.keyCode < 58 && event.shiftKey == false && event.altKey == false)
|| (event.keyCode == 8)
|| (event.keyCode == 9)
);
if (!isValid) {
event.preventDefault();
}
}
});
}
},
/* Refreshes the 'go to page' input.
*************************************************************************/
_refreshGotoPageInput: function() {
if (!this.options.gotoPageArea || this.options.gotoPageArea == 'none') {
return;
}
if (this._totalRecordCount <= 0) {
this._$gotoPageArea.hide();
} else {
this._$gotoPageArea.show();
}
if (this.options.gotoPageArea == 'combobox') {
var oldPageCount = this._$gotoPageInput.data('pageCount');
var currentPageCount = this._calculatePageCount();
if (oldPageCount != currentPageCount) {
this._$gotoPageInput.empty();
//Skip some pages is there are too many pages
var pageStep = 1;
if (currentPageCount > 10000) {
pageStep = 100;
} else if (currentPageCount > 5000) {
pageStep = 10;
} else if (currentPageCount > 2000) {
pageStep = 5;
} else if (currentPageCount > 1000) {
pageStep = 2;
}
for (var i = pageStep; i <= currentPageCount; i += pageStep) {
this._$gotoPageInput.append('<option value="' + i + '">' + i + '</option>');
}
this._$gotoPageInput.data('pageCount', currentPageCount);
}
}
//same for 'textbox' and 'combobox'
this._$gotoPageInput.val(this._currentPageNo);
},
/************************************************************************
* OVERRIDED METHODS *
*************************************************************************/
/* Overrides load method to set current page to 1.
*************************************************************************/
load: function() {
this._currentPageNo = 1;
base.load.apply(this, arguments);
},
/* Used to change options dynamically after initialization.
*************************************************************************/
_setOption: function(key, value) {
base._setOption.apply(this, arguments);
if (key == 'pageSize') {
this._changePageSize(parseInt(value));
}
},
/* Changes current page size with given value.
*************************************************************************/
_changePageSize: function(pageSize) {
if (pageSize == this.options.pageSize) {
return;
}
this.options.pageSize = pageSize;
//Normalize current page
var pageCount = this._calculatePageCount();
if (this._currentPageNo > pageCount) {
this._currentPageNo = pageCount;
}
if (this._currentPageNo <= 0) {
this._currentPageNo = 1;
}
//if user sets one of the options on the combobox, then select it.
var $pageSizeChangeCombobox = this._$bottomPanel.find('.jtable-page-size-change select');
if ($pageSizeChangeCombobox.length > 0) {
if (parseInt($pageSizeChangeCombobox.val()) != pageSize) {
var selectedOption = $pageSizeChangeCombobox.find('option[value=' + pageSize + ']');
if (selectedOption.length > 0) {
$pageSizeChangeCombobox.val(pageSize);
}
}
}
this._savePagingSettings();
this._reloadTable();
},
/* Saves user preferences for paging
*************************************************************************/
_savePagingSettings: function() {
if (!this.options.saveUserPreferences) {
return;
}
this._setCookie('page-size', this.options.pageSize);
},
/* Overrides _createRecordLoadUrl method to add paging info to URL.
*************************************************************************/
_createRecordLoadUrl: function() {
var loadUrl = base._createRecordLoadUrl.apply(this, arguments);
loadUrl = this._addPagingInfoToUrl(loadUrl, this._currentPageNo);
return loadUrl;
},
/* Overrides _createJtParamsForLoading method to add paging parameters to jtParams object.
*************************************************************************/
_createJtParamsForLoading: function () {
var jtParams = base._createJtParamsForLoading.apply(this, arguments);
if (this.options.paging) {
jtParams.jtStartIndex = (this._currentPageNo - 1) * this.options.pageSize;
jtParams.jtPageSize = this.options.pageSize;
}
return jtParams;
},
/* Overrides _addRowToTable method to re-load table when a new row is created.
* NOTE: THIS METHOD IS DEPRECATED AND WILL BE REMOVED FROM FEATURE RELEASES.
* USE _addRow METHOD.
*************************************************************************/
_addRowToTable: function ($tableRow, index, isNewRow) {
if (isNewRow && this.options.paging) {
this._reloadTable();
return;
}
base._addRowToTable.apply(this, arguments);
},
/* Overrides _addRow method to re-load table when a new row is created.
*************************************************************************/
_addRow: function ($row, options) {
if (options && options.isNewRow && this.options.paging) {
this._reloadTable();
return;
}
base._addRow.apply(this, arguments);
},
/* Overrides _removeRowsFromTable method to re-load table when a row is removed from table.
*************************************************************************/
_removeRowsFromTable: function ($rows, reason) {
base._removeRowsFromTable.apply(this, arguments);
if (this.options.paging) {
if (this._$tableRows.length <= 0 && this._currentPageNo > 1) {
--this._currentPageNo;
}
this._reloadTable();
}
},
/* Overrides _onRecordsLoaded method to to do paging specific tasks.
*************************************************************************/
_onRecordsLoaded: function (data) {
if (this.options.paging) {
this._totalRecordCount = data.TotalRecordCount;
this._createPagingList();
this._createPagingInfo();
this._refreshGotoPageInput();
}
base._onRecordsLoaded.apply(this, arguments);
},
/************************************************************************
* PRIVATE METHODS *
*************************************************************************/
/* Adds jtStartIndex and jtPageSize parameters to a URL as query string.
*************************************************************************/
_addPagingInfoToUrl: function (url, pageNumber) {
if (!this.options.paging) {
return url;
}
var jtStartIndex = (pageNumber - 1) * this.options.pageSize;
var jtPageSize = this.options.pageSize;
return (url + (url.indexOf('?') < 0 ? '?' : '&') + 'jtStartIndex=' + jtStartIndex + '&jtPageSize=' + jtPageSize);
},
/* Creates and shows the page list.
*************************************************************************/
_createPagingList: function () {
if (this.options.pageSize <= 0) {
return;
}
this._$pagingListArea.empty();
if (this._totalRecordCount <= 0) {
return;
}
var pageCount = this._calculatePageCount();
this._createFirstAndPreviousPageButtons();
if (this.options.pageList == 'normal') {
this._createPageNumberButtons(this._calculatePageNumbers(pageCount));
}
this._createLastAndNextPageButtons(pageCount);
this._bindClickEventsToPageNumberButtons();
},
/* Creates and shows previous and first page links.
*************************************************************************/
_createFirstAndPreviousPageButtons: function () {
var $first = $('<span></span>')
.addClass('jtable-page-number-first')
.html('<<')
.data('pageNumber', 1)
.appendTo(this._$pagingListArea);
var $previous = $('<span></span>')
.addClass('jtable-page-number-previous')
.html('<')
.data('pageNumber', this._currentPageNo - 1)
.appendTo(this._$pagingListArea);
this._jqueryuiThemeAddClass($first, 'ui-button ui-state-default', 'ui-state-hover');
this._jqueryuiThemeAddClass($previous, 'ui-button ui-state-default', 'ui-state-hover');
if (this._currentPageNo <= 1) {
$first.addClass('jtable-page-number-disabled');
$previous.addClass('jtable-page-number-disabled');
this._jqueryuiThemeAddClass($first, 'ui-state-disabled');
this._jqueryuiThemeAddClass($previous, 'ui-state-disabled');
}
},
/* Creates and shows next and last page links.
*************************************************************************/
_createLastAndNextPageButtons: function (pageCount) {
var $next = $('<span></span>')
.addClass('jtable-page-number-next')
.html('>')
.data('pageNumber', this._currentPageNo + 1)
.appendTo(this._$pagingListArea);
var $last = $('<span></span>')
.addClass('jtable-page-number-last')
.html('>>')
.data('pageNumber', pageCount)
.appendTo(this._$pagingListArea);
this._jqueryuiThemeAddClass($next, 'ui-button ui-state-default', 'ui-state-hover');
this._jqueryuiThemeAddClass($last, 'ui-button ui-state-default', 'ui-state-hover');
if (this._currentPageNo >= pageCount) {
$next.addClass('jtable-page-number-disabled');
$last.addClass('jtable-page-number-disabled');
this._jqueryuiThemeAddClass($next, 'ui-state-disabled');
this._jqueryuiThemeAddClass($last, 'ui-state-disabled');
}
},
/* Creates and shows page number links for given number array.
*************************************************************************/
_createPageNumberButtons: function (pageNumbers) {
var previousNumber = 0;
for (var i = 0; i < pageNumbers.length; i++) {
//Create "..." between page numbers if needed
if ((pageNumbers[i] - previousNumber) > 1) {
$('<span></span>')
.addClass('jtable-page-number-space')
.html('...')
.appendTo(this._$pagingListArea);
}
this._createPageNumberButton(pageNumbers[i]);
previousNumber = pageNumbers[i];
}
},
/* Creates a page number link and adds to paging area.
*************************************************************************/
_createPageNumberButton: function (pageNumber) {
var $pageNumber = $('<span></span>')
.addClass('jtable-page-number')
.html(pageNumber)
.data('pageNumber', pageNumber)
.appendTo(this._$pagingListArea);
this._jqueryuiThemeAddClass($pageNumber, 'ui-button ui-state-default', 'ui-state-hover');
if (this._currentPageNo == pageNumber) {
$pageNumber.addClass('jtable-page-number-active jtable-page-number-disabled');
this._jqueryuiThemeAddClass($pageNumber, 'ui-state-active');
}
},
/* Calculates total page count according to page size and total record count.
*************************************************************************/
_calculatePageCount: function () {
var pageCount = Math.floor(this._totalRecordCount / this.options.pageSize);
if (this._totalRecordCount % this.options.pageSize != 0) {
++pageCount;
}
return pageCount;
},
/* Calculates page numbers and returns an array of these numbers.
*************************************************************************/
_calculatePageNumbers: function (pageCount) {
if (pageCount <= 4) {
//Show all pages
var pageNumbers = [];
for (var i = 1; i <= pageCount; ++i) {
pageNumbers.push(i);
}
return pageNumbers;
} else {
//show first three, last three, current, previous and next page numbers
var shownPageNumbers = [1, 2, pageCount - 1, pageCount];
var previousPageNo = this._normalizeNumber(this._currentPageNo - 1, 1, pageCount, 1);
var nextPageNo = this._normalizeNumber(this._currentPageNo + 1, 1, pageCount, 1);
this._insertToArrayIfDoesNotExists(shownPageNumbers, previousPageNo);
this._insertToArrayIfDoesNotExists(shownPageNumbers, this._currentPageNo);
this._insertToArrayIfDoesNotExists(shownPageNumbers, nextPageNo);
shownPageNumbers.sort(function (a, b) { return a - b; });
return shownPageNumbers;
}
},
/* Creates and shows paging informations.
*************************************************************************/
_createPagingInfo: function () {
if (this._totalRecordCount <= 0) {
this._$pageInfoSpan.empty();
return;
}
var startNo = (this._currentPageNo - 1) * this.options.pageSize + 1;
var endNo = this._currentPageNo * this.options.pageSize;
endNo = this._normalizeNumber(endNo, startNo, this._totalRecordCount, 0);
if (endNo >= startNo) {
var pagingInfoMessage = this._formatString(this.options.messages.pagingInfo, startNo, endNo, this._totalRecordCount);
this._$pageInfoSpan.html(pagingInfoMessage);
}
},
/* Binds click events of all page links to change the page.
*************************************************************************/
_bindClickEventsToPageNumberButtons: function () {
var self = this;
self._$pagingListArea
.find('.jtable-page-number,.jtable-page-number-previous,.jtable-page-number-next,.jtable-page-number-first,.jtable-page-number-last')
.not('.jtable-page-number-disabled')
.click(function (e) {
e.preventDefault();
self._changePage($(this).data('pageNumber'));
});
},
/* Changes current page to given value.
*************************************************************************/
_changePage: function (pageNo) {
pageNo = this._normalizeNumber(pageNo, 1, this._calculatePageCount(), 1);
if (pageNo == this._currentPageNo) {
this._refreshGotoPageInput();
return;
}
this._currentPageNo = pageNo;
this._reloadTable();
}
});
})(jQuery);