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289 lines
7.5 KiB
JavaScript
289 lines
7.5 KiB
JavaScript
2 years ago
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/*
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* jQuery JSONP Core Plugin 2.3.1 (2012-05-16)
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*
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* https://github.com/jaubourg/jquery-jsonp
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*
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* Copyright (c) 2012 Julian Aubourg
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*
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* This document is licensed as free software under the terms of the
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* MIT License: http://www.opensource.org/licenses/mit-license.php
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*/
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( function( $ ) {
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// ###################### UTILITIES ##
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// Noop
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function noop() {
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}
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// Generic callback
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function genericCallback( data ) {
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lastValue = [ data ];
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}
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// Call if defined
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function callIfDefined( method , object , parameters , returnFlag ) {
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try {
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returnFlag = method && method.apply( object.context || object , parameters );
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} catch( _ ) {
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returnFlag = !1;
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}
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return returnFlag;
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}
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// Give joining character given url
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function qMarkOrAmp( url ) {
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return /\?/ .test( url ) ? "&" : "?";
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}
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var // String constants (for better minification)
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STR_ASYNC = "async",
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STR_CHARSET = "charset",
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STR_EMPTY = "",
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STR_ERROR = "error",
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STR_INSERT_BEFORE = "insertBefore",
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STR_JQUERY_JSONP = "_jqjsp",
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STR_ON = "on",
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STR_ON_CLICK = STR_ON + "click",
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STR_ON_ERROR = STR_ON + STR_ERROR,
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STR_ON_LOAD = STR_ON + "load",
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STR_ON_READY_STATE_CHANGE = STR_ON + "readystatechange",
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STR_READY_STATE = "readyState",
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STR_REMOVE_CHILD = "removeChild",
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STR_SCRIPT_TAG = "<script>",
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STR_SUCCESS = "success",
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STR_TIMEOUT = "timeout",
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// Window
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win = window,
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// Deferred
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Deferred = $.Deferred,
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// Head element
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head = $( "head" )[ 0 ] || document.documentElement,
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// Page cache
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pageCache = {},
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// Counter
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count = 0,
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// Last returned value
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lastValue,
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// ###################### DEFAULT OPTIONS ##
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xOptionsDefaults = {
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//beforeSend: undefined,
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//cache: false,
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callback: STR_JQUERY_JSONP,
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//callbackParameter: undefined,
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//charset: undefined,
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//complete: undefined,
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//context: undefined,
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//data: "",
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//dataFilter: undefined,
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//error: undefined,
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//pageCache: false,
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//success: undefined,
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//timeout: 0,
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//traditional: false,
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url: location.href
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},
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// opera demands sniffing :/
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opera = win.opera;
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// ###################### MAIN FUNCTION ##
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function jsonp( xOptions ) {
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// Build data with default
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xOptions = $.extend( {} , xOptionsDefaults , xOptions );
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// References to xOptions members (for better minification)
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var successCallback = xOptions.success,
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errorCallback = xOptions.error,
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completeCallback = xOptions.complete,
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dataFilter = xOptions.dataFilter,
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callbackParameter = xOptions.callbackParameter,
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successCallbackName = xOptions.callback,
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cacheFlag = xOptions.cache,
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pageCacheFlag = xOptions.pageCache,
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charset = xOptions.charset,
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url = xOptions.url,
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data = xOptions.data,
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timeout = xOptions.timeout,
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pageCached,
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// Abort/done flag
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done = 0,
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// Life-cycle functions
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cleanUp = noop,
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// Support vars
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supportOnload,
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supportOnreadystatechange,
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// Request execution vars
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firstChild,
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script,
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scriptAfter,
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timeoutTimer;
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// If we have Deferreds:
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// - substitute callbacks
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// - promote xOptions to a promise
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Deferred && Deferred(function( defer ) {
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defer.done( successCallback ).fail( errorCallback );
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successCallback = defer.resolve;
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errorCallback = defer.reject;
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}).promise( xOptions );
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// Create the abort method
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xOptions.abort = function() {
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!( done++ ) && cleanUp();
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};
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// Call beforeSend if provided (early abort if false returned)
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if ( callIfDefined( xOptions.beforeSend, xOptions , [ xOptions ] ) === !1 || done ) {
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return xOptions;
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}
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// Control entries
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url = url || STR_EMPTY;
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data = data ? ( (typeof data) == "string" ? data : $.param( data , xOptions.traditional ) ) : STR_EMPTY;
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// Build final url
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url += data ? ( qMarkOrAmp( url ) + data ) : STR_EMPTY;
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// Add callback parameter if provided as option
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callbackParameter && ( url += qMarkOrAmp( url ) + encodeURIComponent( callbackParameter ) + "=?" );
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// Add anticache parameter if needed
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!cacheFlag && !pageCacheFlag && ( url += qMarkOrAmp( url ) + "_" + ( new Date() ).getTime() + "=" );
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// Replace last ? by callback parameter
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url = url.replace( /=\?(&|$)/ , "=" + successCallbackName + "$1" );
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// Success notifier
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function notifySuccess( json ) {
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if ( !( done++ ) ) {
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cleanUp();
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// Pagecache if needed
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pageCacheFlag && ( pageCache [ url ] = { s: [ json ] } );
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// Apply the data filter if provided
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dataFilter && ( json = dataFilter.apply( xOptions , [ json ] ) );
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// Call success then complete
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callIfDefined( successCallback , xOptions , [ json , STR_SUCCESS ] );
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callIfDefined( completeCallback , xOptions , [ xOptions , STR_SUCCESS ] );
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}
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}
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// Error notifier
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function notifyError( type ) {
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if ( !( done++ ) ) {
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// Clean up
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cleanUp();
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// If pure error (not timeout), cache if needed
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pageCacheFlag && type != STR_TIMEOUT && ( pageCache[ url ] = type );
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// Call error then complete
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callIfDefined( errorCallback , xOptions , [ xOptions , type ] );
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callIfDefined( completeCallback , xOptions , [ xOptions , type ] );
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}
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}
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// Check page cache
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if ( pageCacheFlag && ( pageCached = pageCache[ url ] ) ) {
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pageCached.s ? notifySuccess( pageCached.s[ 0 ] ) : notifyError( pageCached );
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} else {
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// Install the generic callback
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// (BEWARE: global namespace pollution ahoy)
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win[ successCallbackName ] = genericCallback;
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// Create the script tag
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script = $( STR_SCRIPT_TAG )[ 0 ];
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script.id = STR_JQUERY_JSONP + count++;
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// Set charset if provided
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if ( charset ) {
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script[ STR_CHARSET ] = charset;
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}
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opera && opera.version() < 11.60 ?
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// onerror is not supported: do not set as async and assume in-order execution.
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// Add a trailing script to emulate the event
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( ( scriptAfter = $( STR_SCRIPT_TAG )[ 0 ] ).text = "document.getElementById('" + script.id + "')." + STR_ON_ERROR + "()" )
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:
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// onerror is supported: set the script as async to avoid requests blocking each others
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( script[ STR_ASYNC ] = STR_ASYNC )
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;
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// Internet Explorer: event/htmlFor trick
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if ( STR_ON_READY_STATE_CHANGE in script ) {
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script.htmlFor = script.id;
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script.event = STR_ON_CLICK;
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}
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// Attached event handlers
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script[ STR_ON_LOAD ] = script[ STR_ON_ERROR ] = script[ STR_ON_READY_STATE_CHANGE ] = function ( result ) {
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// Test readyState if it exists
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if ( !script[ STR_READY_STATE ] || !/i/.test( script[ STR_READY_STATE ] ) ) {
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try {
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script[ STR_ON_CLICK ] && script[ STR_ON_CLICK ]();
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} catch( _ ) {}
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result = lastValue;
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lastValue = 0;
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result ? notifySuccess( result[ 0 ] ) : notifyError( STR_ERROR );
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}
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};
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// Set source
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script.src = url;
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// Re-declare cleanUp function
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cleanUp = function( i ) {
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timeoutTimer && clearTimeout( timeoutTimer );
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script[ STR_ON_READY_STATE_CHANGE ] = script[ STR_ON_LOAD ] = script[ STR_ON_ERROR ] = null;
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head[ STR_REMOVE_CHILD ]( script );
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scriptAfter && head[ STR_REMOVE_CHILD ]( scriptAfter );
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};
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// Append main script
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head[ STR_INSERT_BEFORE ]( script , ( firstChild = head.firstChild ) );
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// Append trailing script if needed
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scriptAfter && head[ STR_INSERT_BEFORE ]( scriptAfter , firstChild );
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// If a timeout is needed, install it
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timeoutTimer = timeout > 0 && setTimeout( function() {
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notifyError( STR_TIMEOUT );
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} , timeout );
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}
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return xOptions;
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}
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// ###################### SETUP FUNCTION ##
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jsonp.setup = function( xOptions ) {
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$.extend( xOptionsDefaults , xOptions );
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};
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// ###################### INSTALL in jQuery ##
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$.jsonp = jsonp;
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} )( jQuery );
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