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define( [
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"../core",
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"./var/nonce",
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"./var/rquery",
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"../ajax"
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], function( jQuery, nonce, rquery ) {
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"use strict";
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var oldCallbacks = [],
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rjsonp = /(=)\?(?=&|$)|\?\?/;
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// Default jsonp settings
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jQuery.ajaxSetup( {
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jsonp: "callback",
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jsonpCallback: function() {
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var callback = oldCallbacks.pop() || ( jQuery.expando + "_" + ( nonce++ ) );
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this[ callback ] = true;
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return callback;
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}
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} );
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// Detect, normalize options and install callbacks for jsonp requests
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jQuery.ajaxPrefilter( "json jsonp", function( s, originalSettings, jqXHR ) {
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var callbackName, overwritten, responseContainer,
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jsonProp = s.jsonp !== false && ( rjsonp.test( s.url ) ?
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"url" :
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typeof s.data === "string" &&
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( s.contentType || "" )
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.indexOf( "application/x-www-form-urlencoded" ) === 0 &&
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rjsonp.test( s.data ) && "data"
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);
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// Handle iff the expected data type is "jsonp" or we have a parameter to set
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if ( jsonProp || s.dataTypes[ 0 ] === "jsonp" ) {
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// Get callback name, remembering preexisting value associated with it
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callbackName = s.jsonpCallback = jQuery.isFunction( s.jsonpCallback ) ?
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s.jsonpCallback() :
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s.jsonpCallback;
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// Insert callback into url or form data
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if ( jsonProp ) {
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s[ jsonProp ] = s[ jsonProp ].replace( rjsonp, "$1" + callbackName );
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} else if ( s.jsonp !== false ) {
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s.url += ( rquery.test( s.url ) ? "&" : "?" ) + s.jsonp + "=" + callbackName;
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}
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// Use data converter to retrieve json after script execution
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s.converters[ "script json" ] = function() {
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if ( !responseContainer ) {
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jQuery.error( callbackName + " was not called" );
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}
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return responseContainer[ 0 ];
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};
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// Force json dataType
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s.dataTypes[ 0 ] = "json";
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// Install callback
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overwritten = window[ callbackName ];
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window[ callbackName ] = function() {
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responseContainer = arguments;
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};
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// Clean-up function (fires after converters)
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jqXHR.always( function() {
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// If previous value didn't exist - remove it
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if ( overwritten === undefined ) {
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jQuery( window ).removeProp( callbackName );
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// Otherwise restore preexisting value
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} else {
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window[ callbackName ] = overwritten;
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}
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// Save back as free
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if ( s[ callbackName ] ) {
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// Make sure that re-using the options doesn't screw things around
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s.jsonpCallback = originalSettings.jsonpCallback;
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// Save the callback name for future use
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oldCallbacks.push( callbackName );
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}
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// Call if it was a function and we have a response
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if ( responseContainer && jQuery.isFunction( overwritten ) ) {
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overwritten( responseContainer[ 0 ] );
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}
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responseContainer = overwritten = undefined;
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} );
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// Delegate to script
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return "script";
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}
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} );
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} );
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