Added deferred to core. Used internally for DOM readyness and ajax callbacks.
This commit is contained in:
jaubourg
parent
291b1edf44
commit
88d97deb77
3 changed files with 450 additions and 179 deletions
208
src/core.js
208
src/core.js
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@ -60,8 +60,8 @@ var jQuery = function( selector, context ) {
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// Has the ready events already been bound?
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readyBound = false,
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// The functions to execute on DOM ready
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readyList = [],
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// The deferred used on DOM ready
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readyList,
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// The ready event handler
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DOMContentLoaded,
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@ -75,7 +75,10 @@ var jQuery = function( selector, context ) {
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indexOf = Array.prototype.indexOf,
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// [[Class]] -> type pairs
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class2type = {};
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class2type = {},
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// Marker for deferred
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deferredMarker = [];
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jQuery.fn = jQuery.prototype = {
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init: function( selector, context ) {
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@ -253,22 +256,12 @@ jQuery.fn = jQuery.prototype = {
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return jQuery.each( this, callback, args );
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},
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ready: function( fn ) {
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ready: function() {
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// Attach the listeners
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jQuery.bindReady();
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// If the DOM is already ready
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if ( jQuery.isReady ) {
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// Execute the function immediately
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fn.call( document, jQuery );
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// Otherwise, remember the function for later
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} else if ( readyList ) {
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// Add the function to the wait list
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readyList.push( fn );
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}
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return this;
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// Change ready & apply
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return ( jQuery.fn.ready = readyList.then ).apply( this , arguments );
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},
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eq: function( i ) {
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@ -415,23 +408,11 @@ jQuery.extend({
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}
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// If there are functions bound, to execute
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if ( readyList ) {
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// Execute all of them
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var fn,
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i = 0,
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ready = readyList;
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// Reset the list of functions
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readyList = null;
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while ( (fn = ready[ i++ ]) ) {
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fn.call( document, jQuery );
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}
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// Trigger any bound ready events
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if ( jQuery.fn.trigger ) {
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jQuery( document ).trigger( "ready" ).unbind( "ready" );
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}
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readyList.fire( document , [ jQuery ] );
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// Trigger any bound ready events
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if ( jQuery.fn.trigger ) {
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jQuery( document ).trigger( "ready" ).unbind( "ready" );
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}
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}
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},
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@ -800,6 +781,160 @@ jQuery.extend({
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now: function() {
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return (new Date()).getTime();
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},
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// Create a simple deferred (one callbacks list)
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_deferred: function( cancellable ) {
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// cancellable by default
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cancellable = cancellable !== false;
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var // callbacks list
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callbacks = [],
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// stored [ context , args ]
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fired,
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// to avoid firing when already doing so
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firing,
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// flag to know if the deferred has been cancelled
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cancelled,
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// the deferred itself
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deferred = {
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// then( f1, f2, ...)
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then: function() {
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if ( ! cancelled ) {
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var args = arguments,
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i,
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type,
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_fired;
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if ( fired ) {
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_fired = fired;
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fired = 0;
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}
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for ( i in args ) {
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i = args[ i ];
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type = jQuery.type( i );
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if ( type === "array" ) {
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this.then.apply( this , i );
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} else if ( type === "function" ) {
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callbacks.push( i );
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}
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}
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if ( _fired ) {
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deferred.fire( _fired[ 0 ] , _fired[ 1 ] );
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}
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}
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return this;
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},
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// resolve with given context and args
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// (i is used internally)
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fire: function( context , args , i ) {
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if ( ! cancelled && ! fired && ! firing ) {
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firing = 1;
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try {
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for( i = 0 ; ! cancelled && callbacks[ i ] ; i++ ) {
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cancelled = ( callbacks[ i ].apply( context , args ) === false ) && cancellable;
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}
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} catch( e ) {
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cancelled = cancellable;
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jQuery.error( e );
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} finally {
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fired = [ context , args ];
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callbacks = cancelled ? [] : callbacks.slice( i + 1 );
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firing = 0;
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}
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}
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return this;
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},
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// resolve with this as context and given arguments
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resolve: function() {
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deferred.fire( this , arguments );
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return this;
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},
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// cancelling further callbacks
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cancel: function() {
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if ( cancellable ) {
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callbacks = [];
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cancelled = 1;
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}
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return this;
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}
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};
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// Add the deferred marker
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deferred.then._ = deferredMarker;
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return deferred;
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},
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// Full fledged deferred (two callbacks list)
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// Typical success/error system
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deferred: function( func , cancellable ) {
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// Handle varargs
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if ( arguments.length === 1 ) {
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if ( typeof func === "boolean" ) {
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cancellable = func;
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func = 0;
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}
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}
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var errorDeferred = jQuery._deferred( cancellable ),
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deferred = jQuery._deferred( cancellable ),
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// Keep reference of the cancel method since we'll redefine it
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cancelThen = deferred.cancel;
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// Add errorDeferred methods and redefine cancel
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jQuery.extend( deferred , {
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fail: errorDeferred.then,
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fireReject: errorDeferred.fire,
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reject: errorDeferred.resolve,
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cancel: function() {
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cancelThen();
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errorDeferred.cancel();
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return this;
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}
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} );
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// Make sure only one callback list will be used
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deferred.then( errorDeferred.cancel ).fail( cancelThen );
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// Call given func if any
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if ( func ) {
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func.call( deferred , deferred );
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}
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return deferred;
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},
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// Check if an object is a deferred
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isDeferred: function( object , method ) {
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method = method || "then";
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return !!( object && object[ method ] && object[ method ]._ === deferredMarker );
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},
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// Deferred helper
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when: function( object , method ) {
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method = method || "then";
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object = jQuery.isDeferred( object , method ) ?
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object :
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jQuery.deferred().resolve( object );
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object.fail = object.fail || function() { return this; };
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object[ method ] = object[ method ] || object.then;
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object.then = object.then || object[ method ];
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return object;
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},
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// Use of jQuery.browser is frowned upon.
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// More details: http://docs.jquery.com/Utilities/jQuery.browser
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@ -818,6 +953,11 @@ jQuery.extend({
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browser: {}
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});
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// Create readyList deferred
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// also force $.fn.ready to be recognized as a defer
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readyList = jQuery._deferred( false );
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jQuery.fn.ready._ = deferredMarker;
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// Populate the class2type map
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jQuery.each("Boolean Number String Function Array Date RegExp Object".split(" "), function(i, name) {
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class2type[ "[object " + name + "]" ] = name.toLowerCase();
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171
src/xhr.js
171
src/xhr.js
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@ -18,18 +18,19 @@ jQuery.xhr = function( _native ) {
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return jQuery.ajaxSettings.xhr();
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}
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function reset(force) {
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function reset( force ) {
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// We only need to reset if we went through the init phase
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// (with the exception of object creation)
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if ( force || internal ) {
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// Reset callbacks lists
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callbacksLists = {
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success: createCBList(),
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error: createCBList(),
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complete: createCBList()
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};
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deferred = jQuery.deferred();
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completeDeferred = jQuery._deferred();
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xhr.success = xhr.then = deferred.then;
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xhr.error = xhr.fail = deferred.fail;
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xhr.complete = completeDeferred.then;
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// Reset private variables
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requestHeaders = {};
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@ -155,8 +156,8 @@ jQuery.xhr = function( _native ) {
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callbackContext = s.context || s;
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globalEventContext = s.context ? jQuery(s.context) : jQuery.event;
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for ( i in callbacksLists ) {
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callbacksLists[i].bind(s[i]);
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for ( i in { success:1, error:1, complete:1 } ) {
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xhr[ i ]( s[ i ] );
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}
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// Watch for a new set of requests
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@ -355,10 +356,12 @@ jQuery.xhr = function( _native ) {
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// Keep local copies of vars in case callbacks re-use the xhr
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var _s = s,
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_callbacksLists = callbacksLists,
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_deferred = deferred,
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_completeDeferred = completeDeferred,
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_callbackContext = callbackContext,
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_globalEventContext = globalEventContext;
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// Set state if the xhr hasn't been re-used
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function _setState( value ) {
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if ( xhr.readyState && s === _s ) {
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@ -375,18 +378,20 @@ jQuery.xhr = function( _native ) {
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// We're done
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_setState( 4 );
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// Success
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_callbacksLists.success.fire( isSuccess , _callbackContext , success, statusText, xhr);
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if ( isSuccess && _s.global ) {
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_globalEventContext.trigger( "ajaxSuccess", [xhr, _s, success] );
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// Success/Error
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if ( isSuccess ) {
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_deferred.fire( _callbackContext , [ success , statusText , xhr ] );
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} else {
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_deferred.fireReject( _callbackContext , [ xhr , statusText , error ] );
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}
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// Error
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_callbacksLists.error.fire( ! isSuccess , _callbackContext , xhr, statusText, error);
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if ( !isSuccess && _s.global ) {
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_globalEventContext.trigger( "ajaxError", [xhr, _s, error] );
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if ( _s.global ) {
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_globalEventContext.trigger( "ajax" + ( isSuccess ? "Success" : "Error" ) , [ xhr , _s , isSuccess ? success : error ] );
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}
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// Complete
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_callbacksLists.complete.fire( 1 , _callbackContext, xhr, statusText);
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_completeDeferred.fire( _callbackContext, [ xhr , statusText ] );
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if ( _s.global ) {
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_globalEventContext.trigger( "ajaxComplete", [xhr, _s] );
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// Handle the global AJAX counter
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@ -419,7 +424,8 @@ jQuery.xhr = function( _native ) {
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// Callback stuff
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callbackContext,
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globalEventContext,
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callbacksLists,
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deferred,
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completeDeferred,
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// Headers (they are sent all at once)
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requestHeaders,
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// Response headers
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@ -596,135 +602,10 @@ jQuery.xhr = function( _native ) {
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// Init data (so that we can bind callbacks early
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reset(1);
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// Install callbacks related methods
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jQuery.each(callbacksLists, function(name) {
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var list;
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xhr[name] = function() {
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list = callbacksLists[name];
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if ( list ) {
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list.bind.apply(list, arguments );
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}
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return this;
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};
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});
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// Return the xhr emulation
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return xhr;
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};
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// Create a callback list
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function createCBList() {
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var functors = [],
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autoFire = 0,
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fireArgs,
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list = {
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fire: function( flag , context ) {
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// Save info for later bindings
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fireArgs = arguments;
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// Remove autoFire to keep bindings in order
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autoFire = 0;
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var args = sliceFunc.call( fireArgs , 2 );
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// Execute callbacks
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while ( flag && functors.length ) {
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flag = functors.shift().apply( context , args ) !== false;
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}
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// Clean if asked to stop
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if ( ! flag ) {
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clean();
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}
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// Set autoFire
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autoFire = 1;
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},
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bind: function() {
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var args = arguments,
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i = 0,
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length = args.length,
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func;
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for ( ; i < length ; i++ ) {
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func = args[ i ];
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if ( jQuery.isArray(func) ) {
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list.bind.apply( list , func );
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} else if ( isFunction(func) ) {
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// Add if not already in
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if ( ! pos( func ) ) {
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functors.push( func );
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}
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}
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}
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if ( autoFire ) {
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list.fire.apply( list , fireArgs );
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}
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},
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unbind: function() {
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var i = 0,
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args = arguments,
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length = args.length,
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func,
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position;
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if ( length ) {
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for( ; i < length ; i++ ) {
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func = args[i];
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if ( jQuery.isArray(func) ) {
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list.unbind.apply(list,func);
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} else if ( isFunction(func) ) {
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position = pos(func);
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if ( position ) {
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functors.splice(position-1,1);
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}
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}
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}
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} else {
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functors = [];
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}
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}
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};
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// Get the index of the functor in the list (1-based)
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function pos( func ) {
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for (var i = 0, length = functors.length; i < length && functors[i] !== func; i++) {
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}
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return i < length ? ( i + 1 ) : 0;
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}
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// Clean the object
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function clean() {
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// Empty callbacks list
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functors = [];
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// Inhibit methods
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for (var i in list) {
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list[i] = jQuery.noop;
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}
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}
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return list;
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}
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jQuery.extend(jQuery.xhr, {
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// Add new prefilter
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@ -902,3 +902,253 @@ test("jQuery.parseJSON", function(){
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ok( true, "Test malformed JSON string." );
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}
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});
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test("jQuery._deferred()", function() {
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expect( 14 );
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var deferred,
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object,
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test;
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deferred = jQuery._deferred();
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test = false;
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deferred.then( function( value ) {
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equals( value , "value" , "Test pre-resolve callback" );
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test = true;
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} );
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deferred.resolve( "value" );
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ok( test , "Test pre-resolve callbacks called right away" );
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test = false;
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deferred.then( function( value ) {
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equals( value , "value" , "Test post-resolve callback" );
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test = true;
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} );
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ok( test , "Test post-resolve callbacks called right away" );
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deferred.cancel();
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test = true;
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deferred.then( function() {
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ok( false , "Manual cancel was ignored" );
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test = false;
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} );
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ok( test , "Test manual cancel" );
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deferred = jQuery._deferred().then( function() {
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return false;
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} );
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deferred.resolve();
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test = true;
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deferred.then( function() {
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test = false;
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} );
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ok( test , "Test cancel by returning false" );
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try {
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deferred = jQuery._deferred().resolve().then( function() {
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throw "Error";
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} , function() {
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ok( false , "Test deferred cancel on exception" );
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} );
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} catch( e ) {
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strictEqual( e , "Error" , "Test deferred propagates exceptions");
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deferred.then();
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}
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test = "";
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deferred = jQuery._deferred().then( function() {
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test += "A";
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}, function() {
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test += "B";
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} ).resolve();
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||||
|
||||
strictEqual( test , "AB" , "Test multiple then parameters" );
|
||||
|
||||
test = "";
|
||||
|
||||
deferred.then( function() {
|
||||
|
||||
deferred.then( function() {
|
||||
|
||||
test += "C";
|
||||
|
||||
} );
|
||||
|
||||
test += "A";
|
||||
|
||||
}, function() {
|
||||
|
||||
test += "B";
|
||||
} );
|
||||
|
||||
strictEqual( test , "ABC" , "Test then callbacks order" );
|
||||
|
||||
deferred = jQuery._deferred( false ).resolve().cancel();
|
||||
|
||||
deferred.then( function() {
|
||||
ok( true , "Test non-cancellable deferred not cancelled manually");
|
||||
return false;
|
||||
} );
|
||||
|
||||
deferred.then( function() {
|
||||
ok( true , "Test non-cancellable deferred not cancelled by returning false");
|
||||
} );
|
||||
|
||||
try {
|
||||
deferred.then( function() {
|
||||
throw "Error";
|
||||
} , function() {
|
||||
ok( true , "Test non-cancellable deferred keeps callbacks after exception" );
|
||||
} );
|
||||
} catch( e ) {
|
||||
strictEqual( e , "Error" , "Test non-cancellable deferred propagates exceptions");
|
||||
deferred.then();
|
||||
}
|
||||
|
||||
deferred = jQuery._deferred();
|
||||
|
||||
deferred.fire( jQuery , [ document ] ).then( function( doc ) {
|
||||
ok( this === jQuery && arguments.length === 1 && doc === document , "Test fire context & args" );
|
||||
});
|
||||
});
|
||||
|
||||
test("jQuery.deferred()", function() {
|
||||
|
||||
expect( 8 );
|
||||
|
||||
jQuery.deferred( function( defer ) {
|
||||
strictEqual( this , defer , "Defer passed as this & first argument" );
|
||||
this.resolve( "done" );
|
||||
}).then( function( value ) {
|
||||
strictEqual( value , "done" , "Passed function executed" );
|
||||
});
|
||||
|
||||
jQuery.deferred().resolve().then( function() {
|
||||
ok( true , "Success on resolve" );
|
||||
}).fail( function() {
|
||||
ok( false , "Error on resolve" );
|
||||
});
|
||||
|
||||
jQuery.deferred().reject().then( function() {
|
||||
ok( false , "Success on reject" );
|
||||
}).fail( function() {
|
||||
ok( true , "Error on reject" );
|
||||
});
|
||||
|
||||
var flag = true;
|
||||
|
||||
jQuery.deferred().resolve().cancel().then( function() {
|
||||
ok( flag = false , "Success on resolve/cancel" );
|
||||
}).fail( function() {
|
||||
ok( flag = false , "Error on resolve/cancel" );
|
||||
});
|
||||
|
||||
ok( flag , "Cancel on resolve" );
|
||||
|
||||
flag = true;
|
||||
|
||||
jQuery.deferred().reject().cancel().then( function() {
|
||||
ok( flag = false , "Success on reject/cancel" );
|
||||
}).fail( function() {
|
||||
ok( flag = false , "Error on reject/cancel" );
|
||||
});
|
||||
|
||||
ok( flag , "Cancel on reject" );
|
||||
|
||||
jQuery.deferred( false ).resolve().then( function() {
|
||||
return false;
|
||||
} , function() {
|
||||
ok( true , "Not cancelled on resolve" );
|
||||
});
|
||||
|
||||
jQuery.deferred( false ).reject().fail( function() {
|
||||
return false;
|
||||
} , function() {
|
||||
ok( true , "Not cancelled on reject" );
|
||||
});
|
||||
|
||||
});
|
||||
|
||||
test("jQuery.isDeferred()", function() {
|
||||
|
||||
expect( 11 );
|
||||
|
||||
var object1 = { then: function() { return this; } },
|
||||
object2 = { then: function() { return this; } };
|
||||
|
||||
object2.then._ = [];
|
||||
|
||||
// The use case that we want to match
|
||||
ok(jQuery.isDeferred(jQuery._deferred()), "Simple deferred");
|
||||
ok(jQuery.isDeferred(jQuery.deferred()), "Failable deferred");
|
||||
|
||||
// Some other objects
|
||||
ok(!jQuery.isDeferred(object1), "Object with then & no marker");
|
||||
ok(!jQuery.isDeferred(object2), "Object with then & marker");
|
||||
|
||||
// Not objects shouldn't be matched
|
||||
ok(!jQuery.isDeferred(""), "string");
|
||||
ok(!jQuery.isDeferred(0) && !jQuery.isDeferred(1), "number");
|
||||
ok(!jQuery.isDeferred(true) && !jQuery.isDeferred(false), "boolean");
|
||||
ok(!jQuery.isDeferred(null), "null");
|
||||
ok(!jQuery.isDeferred(undefined), "undefined");
|
||||
|
||||
object1 = {custom: jQuery._deferred().then};
|
||||
|
||||
ok(!jQuery.isDeferred(object1) , "custom method name not found automagically");
|
||||
ok(jQuery.isDeferred(object1,"custom") , "custom method name");
|
||||
});
|
||||
|
||||
test("jQuery.when()", function() {
|
||||
|
||||
expect( 5 );
|
||||
|
||||
var cache, i, deferred = { done: jQuery.deferred().resolve( 1 ).then };
|
||||
|
||||
for( i = 1 ; i < 3 ; i++ ) {
|
||||
jQuery.when( cache || jQuery.deferred( function() {
|
||||
this.resolve( i );
|
||||
}) ).then( function( value ) {
|
||||
strictEqual( value , 1 , "Function executed" + ( i > 1 ? " only once" : "" ) );
|
||||
cache = value;
|
||||
}).fail( function() {
|
||||
ok( false , "Fail called" );
|
||||
});
|
||||
}
|
||||
|
||||
cache = 0;
|
||||
|
||||
for( i = 1 ; i < 3 ; i++ ) {
|
||||
jQuery.when( cache || deferred , "done" ).done( function( value ) {
|
||||
strictEqual( value , 1 , "Custom method: resolved" + ( i > 1 ? " only once" : "" ) );
|
||||
cache = value;
|
||||
}).fail( function() {
|
||||
ok( false , "Custom method: fail called" );
|
||||
});
|
||||
}
|
||||
|
||||
stop();
|
||||
|
||||
jQuery.when( jQuery( document ) , "ready" ).then( function( test ) {
|
||||
strictEqual( test , jQuery , "jQuery.fn.ready recognized as a deferred" );
|
||||
start();
|
||||
});
|
||||
});
|
||||
|
|
|
|||
Loading…
Reference in a new issue