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var __reload = function ( settings, holdPosition, callback ) {
// Use the draw event to trigger a callback
if ( callback ) {
var api = new _Api( settings );
api.one( 'draw', function () {
callback( api.ajax.json() );
} );
}
if ( _fnDataSource( settings ) == 'ssp' ) {
_fnReDraw( settings, holdPosition );
}
else {
_fnProcessingDisplay( settings, true );
// Cancel an existing request
var xhr = settings.jqXHR;
if ( xhr && xhr.readyState !== 4 ) {
xhr.abort();
}
// Trigger xhr
_fnBuildAjax( settings, [], function( json ) {
_fnClearTable( settings );
var data = _fnAjaxDataSrc( settings, json );
for ( var i=0, ien=data.length ; i<ien ; i++ ) {
_fnAddData( settings, data[i] );
}
_fnReDraw( settings, holdPosition );
_fnProcessingDisplay( settings, false );
} );
}
};
/**
* Get the JSON response from the last Ajax request that DataTables made to the
* server. Note that this returns the JSON from the first table in the current
* context.
*
* @return {object} JSON received from the server.
*/
_api_register( 'ajax.json()', function () {
var ctx = this.context;
if ( ctx.length > 0 ) {
return ctx[0].json;
}
// else return undefined;
} );
/**
* Get the data submitted in the last Ajax request
*/
_api_register( 'ajax.params()', function () {
var ctx = this.context;
if ( ctx.length > 0 ) {
return ctx[0].oAjaxData;
}
// else return undefined;
} );
/**
* Reload tables from the Ajax data source. Note that this function will
* automatically re-draw the table when the remote data has been loaded.
*
* @param {boolean} [reset=true] Reset (default) or hold the current paging
* position. A full re-sort and re-filter is performed when this method is
* called, which is why the pagination reset is the default action.
* @returns {DataTables.Api} this
*/
_api_register( 'ajax.reload()', function ( callback, resetPaging ) {
return this.iterator( 'table', function (settings) {
__reload( settings, resetPaging===false, callback );
} );
} );
/**
* Get the current Ajax URL. Note that this returns the URL from the first
* table in the current context.
*
* @return {string} Current Ajax source URL
*//**
* Set the Ajax URL. Note that this will set the URL for all tables in the
* current context.
*
* @param {string} url URL to set.
* @returns {DataTables.Api} this
*/
_api_register( 'ajax.url()', function ( url ) {
var ctx = this.context;
if ( url === undefined ) {
// get
if ( ctx.length === 0 ) {
return undefined;
}
ctx = ctx[0];
return ctx.ajax ?
$.isPlainObject( ctx.ajax ) ?
ctx.ajax.url :
ctx.ajax :
ctx.sAjaxSource;
}
// set
return this.iterator( 'table', function ( settings ) {
if ( $.isPlainObject( settings.ajax ) ) {
settings.ajax.url = url;
}
else {
settings.ajax = url;
}
// No need to consider sAjaxSource here since DataTables gives priority
// to `ajax` over `sAjaxSource`. So setting `ajax` here, renders any
// value of `sAjaxSource` redundant.
} );
} );
/**
* Load data from the newly set Ajax URL. Note that this method is only
* available when `ajax.url()` is used to set a URL. Additionally, this method
* has the same effect as calling `ajax.reload()` but is provided for
* convenience when setting a new URL. Like `ajax.reload()` it will
* automatically redraw the table once the remote data has been loaded.
*
* @returns {DataTables.Api} this
*/
_api_register( 'ajax.url().load()', function ( callback, resetPaging ) {
// Same as a reload, but makes sense to present it for easy access after a
// url change
return this.iterator( 'table', function ( ctx ) {
__reload( ctx, resetPaging===false, callback );
} );
} );
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