/**
* Sometimes for quick navigation, it can be useful to allow an end user to
* enter which page they wish to jump to manually. This paging control uses a
* text input box to accept new paging numbers (arrow keys are also allowed
* for), and four standard navigation buttons are also presented to the end
* user.
*
* @name Navigation with text input
* @summary Shows an input element into which the user can type a page number
* @author [Allan Jardine](http://sprymedia.co.uk)
*
* @example
* $(document).ready(function() {
* $('#example').dataTable( {
* "sPaginationType": "input"
* } );
* } );
*/
$.fn.dataTableExt.oPagination.input = {
"fnInit": function ( oSettings, nPaging, fnCallbackDraw )
{
var nFirst = document.createElement( 'span' );
var nPrevious = document.createElement( 'span' );
var nNext = document.createElement( 'span' );
var nLast = document.createElement( 'span' );
var nInput = document.createElement( 'input' );
var nPage = document.createElement( 'span' );
var nOf = document.createElement( 'span' );
nFirst.innerHTML = oSettings.oLanguage.oPaginate.sFirst;
nPrevious.innerHTML = oSettings.oLanguage.oPaginate.sPrevious;
nNext.innerHTML = oSettings.oLanguage.oPaginate.sNext;
nLast.innerHTML = oSettings.oLanguage.oPaginate.sLast;
nFirst.className = "paginate_button first disabled";
nPrevious.className = "paginate_button previous disabled";
nNext.className="paginate_button next";
nLast.className = "paginate_button last";
nOf.className = "paginate_of";
nPage.className = "paginate_page";
nInput.className = "paginate_input";
if ( oSettings.sTableId !== '' )
{
nPaging.setAttribute( 'id', oSettings.sTableId+'_paginate' );
nPrevious.setAttribute( 'id', oSettings.sTableId+'_previous' );
nPrevious.setAttribute( 'id', oSettings.sTableId+'_previous' );
nNext.setAttribute( 'id', oSettings.sTableId+'_next' );
nLast.setAttribute( 'id', oSettings.sTableId+'_last' );
}
nInput.type = "text";
nPage.innerHTML = "Page ";
nPaging.appendChild( nFirst );
nPaging.appendChild( nPrevious );
nPaging.appendChild( nPage );
nPaging.appendChild( nInput );
nPaging.appendChild( nOf );
nPaging.appendChild( nNext );
nPaging.appendChild( nLast );
$(nFirst).click( function ()
{
var iCurrentPage = Math.ceil(oSettings._iDisplayStart / oSettings._iDisplayLength) + 1;
if (iCurrentPage != 1)
{
oSettings.oApi._fnPageChange( oSettings, "first" );
fnCallbackDraw( oSettings );
$(nFirst).addClass('disabled');
$(nPrevious).addClass('disabled');
$(nNext).removeClass('disabled');
$(nLast).removeClass('disabled');
}
} );
$(nPrevious).click( function()
{
var iCurrentPage = Math.ceil(oSettings._iDisplayStart / oSettings._iDisplayLength) + 1;
if (iCurrentPage != 1)
{
oSettings.oApi._fnPageChange(oSettings, "previous");
fnCallbackDraw(oSettings);
if (iCurrentPage == 2)
{
$(nFirst).addClass('disabled');
$(nPrevious).addClass('disabled');
}
$(nNext).removeClass('disabled');
$(nLast).removeClass('disabled');
}
} );
$(nNext).click( function()
{
var iCurrentPage = Math.ceil(oSettings._iDisplayStart / oSettings._iDisplayLength) + 1;
if (iCurrentPage != Math.ceil((oSettings.fnRecordsDisplay() / oSettings._iDisplayLength)))
{
oSettings.oApi._fnPageChange(oSettings, "next");
fnCallbackDraw(oSettings);
if (iCurrentPage == (Math.ceil((oSettings.fnRecordsDisplay() - 1) / oSettings._iDisplayLength) - 1))
{
$(nNext).addClass('disabled');
$(nLast).addClass('disabled');
}
$(nFirst).removeClass('disabled');
$(nPrevious).removeClass('disabled');
}
} );
$(nLast).click( function()
{
var iCurrentPage = Math.ceil(oSettings._iDisplayStart / oSettings._iDisplayLength) + 1;
if (iCurrentPage != Math.ceil((oSettings.fnRecordsDisplay() / oSettings._iDisplayLength)))
{
oSettings.oApi._fnPageChange(oSettings, "last");
fnCallbackDraw(oSettings);
$(nFirst).removeClass('disabled');
$(nPrevious).removeClass('disabled');
$(nNext).addClass('disabled');
$(nLast).addClass('disabled');
}
} );
$(nInput).keyup( function (e) {
// 38 = up arrow, 39 = right arrow
if ( e.which == 38 || e.which == 39 )
{
this.value++;
}
// 37 = left arrow, 40 = down arrow
else if ( (e.which == 37 || e.which == 40) && this.value > 1 )
{
this.value--;
}
if ( this.value === "" || this.value.match(/[^0-9]/) )
{
/* Nothing entered or non-numeric character */
this.value = this.value.replace(/[^\d]/g, ''); // don't even allow anything but digits
return;
}
var iNewStart = oSettings._iDisplayLength * (this.value - 1);
if (iNewStart < 0)
{
iNewStart = 0;
}
if (iNewStart > oSettings.fnRecordsDisplay())
{
iNewStart = (Math.ceil((oSettings.fnRecordsDisplay() - 1) / oSettings._iDisplayLength) - 1) * oSettings._iDisplayLength;
}
if (iNewStart === 0)
{
$(nFirst).addClass('disabled');
$(nPrevious).addClass('disabled');
$(nNext).removeClass('disabled');
$(nLast).removeClass('disabled');
}
else if (iNewStart == ((Math.ceil((oSettings.fnRecordsDisplay() - 1) / oSettings._iDisplayLength) - 1) * oSettings._iDisplayLength))
{
$(nNext).addClass('disabled');
$(nLast).addClass('disabled');
$(nFirst).removeClass('disabled');
$(nPrevious).removeClass('disabled');
}
else
{
$(nFirst).removeClass('disabled');
$(nPrevious).removeClass('disabled');
$(nNext).removeClass('disabled');
$(nLast).removeClass('disabled');
}
oSettings._iDisplayStart = iNewStart;
fnCallbackDraw( oSettings );
} );
/* Take the brutal approach to cancelling text selection */
$('span', nPaging).bind( 'mousedown', function () { return false; } );
$('span', nPaging).bind( 'selectstart', function () { return false; } );
// If we can't page anyway, might as well not show it
var iPages = Math.ceil((oSettings.fnRecordsDisplay()) / oSettings._iDisplayLength);
if(iPages <= 1)
{
$(nPaging).hide();
}
},
"fnUpdate": function ( oSettings, fnCallbackDraw )
{
if ( !oSettings.aanFeatures.p )
{
return;
}
var iPages = Math.ceil((oSettings.fnRecordsDisplay()) / oSettings._iDisplayLength);
var iCurrentPage = Math.ceil(oSettings._iDisplayStart / oSettings._iDisplayLength) + 1;
var an = oSettings.aanFeatures.p;
if (iPages <= 1) // hide paging when we can't page
{
$(an).hide();
}
else
{
/* Loop over each instance of the pager */
for (var i = 0, iLen = an.length ; i < iLen ; i++)
{
var spans = an[i].getElementsByTagName('span');
var inputs = an[i].getElementsByTagName('input');
spans[3].innerHTML = " of " + iPages;
inputs[0].value = iCurrentPage;
}
}
}
};
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