},
// Create a simple deferred (one callbacks list)
- _Deferred: function( cancellable ) {
-
- // cancellable by default
- cancellable = cancellable !== false;
+ _Deferred: function() {
var // callbacks list
callbacks = [],
then: function () {
if ( ! cancelled ) {
-
+
var args = arguments,
i,
length,
deferred.fire( _fired[ 0 ] , _fired[ 1 ] );
}
}
+
return this;
},
// resolve with given context and args
- // (i is used internally)
- fire: function( context , args , i ) {
+ fire: function( context , args ) {
if ( ! cancelled && ! fired && ! firing ) {
+
firing = 1;
+
try {
- for( i = 0 ; ! cancelled && callbacks[ i ] ; i++ ) {
- cancelled = ( callbacks[ i ].apply( context , args ) === false ) && cancellable;
+ while( callbacks[ 0 ] ) {
+ callbacks.shift().apply( context , args );
}
- } catch( e ) {
- cancelled = cancellable;
- jQuery.error( e );
- } finally {
+ }
+ finally {
fired = [ context , args ];
- callbacks = cancelled ? [] : callbacks.slice( i + 1 );
firing = 0;
}
}
return this;
},
- // cancelling further callbacks
+ // Has this deferred been resolved?
+ isResolved: function() {
+ return !!( firing || fired );
+ },
+
+ // Cancel
cancel: function() {
- if ( cancellable ) {
- callbacks = [];
- cancelled = 1;
- }
+ cancelled = 1;
+ callbacks = [];
return this;
- }
+ },
+ // Has this deferred been cancelled?
+ isCancelled: function() {
+ return !!cancelled;
+ }
};
// Add the deferred marker
// Full fledged deferred (two callbacks list)
// Typical success/error system
- Deferred: function( func , cancellable ) {
-
- // Handle varargs
- if ( arguments.length === 1 ) {
-
- if ( typeof func === "boolean" ) {
- cancellable = func;
- func = 0;
- }
- }
+ Deferred: function( func ) {
- var errorDeferred = jQuery._Deferred( cancellable ),
- deferred = jQuery._Deferred( cancellable ),
- // Keep reference of the cancel method since we'll redefine it
- cancelThen = deferred.cancel;
+ var errorDeferred = jQuery._Deferred(),
+ deferred = jQuery._Deferred(),
+ successCancel = deferred.cancel;
// Add errorDeferred methods and redefine cancel
jQuery.extend( deferred , {
fail: errorDeferred.then,
fireReject: errorDeferred.fire,
reject: errorDeferred.resolve,
- cancel: function() {
- cancelThen();
- errorDeferred.cancel();
- return this;
- }
+ isRejected: errorDeferred.isResolved
} );
+ // Remove cancel related
+ delete deferred.cancel;
+ delete deferred.isCancelled;
+
// Make sure only one callback list will be used
- deferred.then( errorDeferred.cancel ).fail( cancelThen );
+ deferred.then( errorDeferred.cancel ).fail( successCancel );
// Call given func if any
if ( func ) {
// Create readyList deferred
// also force $.fn.ready to be recognized as a defer
-readyList = jQuery._Deferred( false );
+readyList = jQuery._Deferred();
jQuery.fn.ready._ = deferredMarker;
// Populate the class2type map
test("jQuery._Deferred()", function() {
- expect( 14 );
+ expect( 10 );
var deferred,
object,
test = true;
deferred.then( function() {
- ok( false , "Manual cancel was ignored" );
+ ok( false , "Cancel was ignored" );
test = false;
} );
- ok( test , "Test manual cancel" );
+ ok( test , "Test cancel" );
- deferred = jQuery._Deferred().then( function() {
- return false;
- } );
-
- deferred.resolve();
+ deferred = jQuery._Deferred().resolve();
- test = true;
-
- deferred.then( function() {
- test = false;
- } );
-
- ok( test , "Test cancel by returning false" );
-
try {
- deferred = jQuery._Deferred().resolve().then( function() {
+ deferred.then( function() {
throw "Error";
} , function() {
- ok( false , "Test deferred cancel on exception" );
+ ok( true , "Test deferred do not cancel on exception" );
} );
} catch( e ) {
strictEqual( e , "Error" , "Test deferred propagates exceptions");
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 ) {
test("jQuery.Deferred()", function() {
- expect( 8 );
+ expect( 4 );
jQuery.Deferred( function( defer ) {
strictEqual( this , defer , "Defer passed as this & first argument" );
}).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() {
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