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Replaces jQuery._Deferred with the much more flexible (and public) jQuery.Callbacks. Hopefully, jQuery.Callbacks can be used as a base for all callback lists needs in jQuery. Also adds progress callbacks to Deferreds (handled in jQuery.when too). Needs more unit tests.

1.7/callbacks
jaubourg 2011-05-06 18:35:08 +02:00
parent 9d4033d629
commit a31195fd5a
15 changed files with 317 additions and 273 deletions
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1
Makefile
View File

@ -10,6 +10,7 @@ COMPILER = ${JS_ENGINE} ${BUILD_DIR}/uglify.js --unsafe
POST_COMPILER = ${JS_ENGINE} ${BUILD_DIR}/post-compile.js
BASE_FILES = ${SRC_DIR}/core.js\
${SRC_DIR}/callbacks.js\
${SRC_DIR}/deferred.js\
${SRC_DIR}/support.js\
${SRC_DIR}/data.js\

6
src/ajax.js
View File

@ -382,7 +382,7 @@ jQuery.extend({
jQuery( callbackContext ) : jQuery.event,
// Deferreds
deferred = jQuery.Deferred(),
completeDeferred = jQuery._Deferred(),
completeCallbacks = jQuery.Callbacks( "once memory" ),
// Status-dependent callbacks
statusCode = s.statusCode || {},
// ifModified key
@ -560,7 +560,7 @@ jQuery.extend({
}
// Complete
completeDeferred.resolveWith( callbackContext, [ jqXHR, statusText ] );
completeCallbacks.fireWith( callbackContext, [ jqXHR, statusText ] );
if ( fireGlobals ) {
globalEventContext.trigger( "ajaxComplete", [ jqXHR, s] );
@ -575,7 +575,7 @@ jQuery.extend({
deferred.promise( jqXHR );
jqXHR.success = jqXHR.done;
jqXHR.error = jqXHR.fail;
jqXHR.complete = completeDeferred.done;
jqXHR.complete = completeCallbacks.add;
// Status-dependent callbacks
jqXHR.statusCode = function( map ) {

206
src/callbacks.js Normal file
View File

@ -0,0 +1,206 @@
(function( jQuery ) {
// String to Object flags format cache
var flagsCache = {};
// Convert String-formatted flags into Object-formatted ones and store in cache
function createFlags( flags ) {
var object = flagsCache[ flags ] = {},
i, length;
flags = flags.split( /\s+/ );
for ( i = 0, length = flags.length; i < length; i++ ) {
object[ flags[i] ] = true;
}
return object;
}
/*
* Create a callback list using the following parameters:
*
* flags: an optional list of space-separated flags that will change how
* the callback list behaves
*
* filter: an optional function that will be applied to each added callbacks,
* what filter returns will then be added provided it is not falsy.
*
* By default a callback list will act like an event callback list and can be
* "fired" multiple times.
*
* Possible flags:
*
* once: will ensure the callback list can only be fired once (like a Deferred)
*
* memory: will keep track of previous values and will call any callback added
* after the list has been fired right away with the latest "memorized"
* values (like a Deferred)
*
* unique: will ensure a callback can only be added once (no duplicate in the list)
*
* relocate: like "unique" but will relocate the callback at the end of the list
*
*/
jQuery.Callbacks = function( flags, filter ) {
// flags are optional
if ( typeof flags !== "string" ) {
filter = flags;
flags = undefined;
}
// Convert flags from String-formatted to Object-formatted
// (we check in cache first)
flags = flags ? ( flagsCache[ flags ] || createFlags( flags ) ) : {};
var // Actual callback list
list = [],
// Stack of fire calls for repeatable lists
stack = !flags.once && [],
// Last fire value (for non-forgettable lists)
memory,
// Flag to know if list is currently firing
firing,
// Add a list of callbacks to the list
add = function( args ) {
var i,
length,
elem,
type,
actual;
for ( i = 0, length = args.length; i < length; i++ ) {
elem = args[ i ];
type = jQuery.type( elem );
if ( type === "array" ) {
// Inspect recursively
add( elem );
} else if ( type === "function" ) {
// If we have to relocate, we remove the callback
// if it already exists
if ( flags.relocate ) {
object.remove( elem );
}
// Unless we have a list with unicity and the
// function is already there, add it
if ( !( flags.unique && object.has( elem ) ) ) {
// Get the filtered function if needs be
actual = filter ? filter(elem) : elem;
if ( actual ) {
list.push( [ elem, actual ] );
}
}
}
}
},
object = {
// Add a callback or a collection of callbacks to the list
add: function() {
if ( list ) {
add( arguments );
// If we're not firing and we should call right away
if ( !firing && flags.memory && memory ) {
// Trick the list into thinking it needs to be fired
var tmp = memory;
memory = undefined;
object.fireWith( tmp[ 0 ], tmp[ 1 ] );
}
}
return this;
},
// Remove a callback from the list
remove: function( fn ) {
if ( list ) {
var i = 0,
length = list.length;
for ( ; i < length; i++ ) {
if ( fn === list[ i ][ 0 ] ) {
list.splice( i, 1 );
i--;
// If we have some unicity property then
// we only need to do this once
if ( flags.unique || flags.relocate ) {
break;
}
}
}
}
return this;
},
// Control if a given callback is in the list
has: function( fn ) {
if ( list ) {
var i = 0,
length = list.length;
for ( ; i < length; i++ ) {
if ( fn === list[ i ][ 0 ] ) {
return true;
}
}
}
return false;
},
// Remove all callbacks from the list
empty: function() {
list = [];
return this;
},
// Have the list do nothing anymore
disable: function() {
list = stack = memory = undefined;
return this;
},
// Lock the list in its current state
lock: function() {
stack = undefined;
if ( !memory ) {
object.disable();
}
return this;
},
// Call all callbacks with the given context and arguments
fireWith: function( context, args ) {
var i;
if ( list && ( flags.once ? !memory && !firing : stack ) ) {
if ( firing ) {
stack.push( [ context, args ] );
} else {
args = args || [];
memory = !flags.memory || [ context, args ];
firing = true;
try {
for ( i = 0; list && i < list.length; i++ ) {
if ( list[ i ][ 1 ].apply( context, args ) === false && flags.stopOnFalse ) {
break;
}
}
} finally {
firing = false;
if ( list ) {
if ( !flags.once ) {
if ( i >= list.length && stack.length ) {
object.fire.apply( this, stack.shift() );
}
} else if ( !flags.memory ) {
object.destroy();
} else {
list = [];
}
}
}
}
}
return this;
},
// Call all the callbacks with the given arguments
fire: function() {
object.fireWith( this, arguments );
return this;
},
// To know if the callbacks have already been called at least once
fired: function() {
return !!memory;
}
};
return object;
};
})( jQuery );

8
src/core.js
View File

@ -58,7 +58,7 @@ var jQuery = function( selector, context ) {
// For matching the engine and version of the browser
browserMatch,
// The deferred used on DOM ready
// The callback list used on DOM ready
readyList,
// The ready event handler
@ -257,7 +257,7 @@ jQuery.fn = jQuery.prototype = {
jQuery.bindReady();
// Add the callback
readyList.done( fn );
readyList.add( fn );
return this;
},
@ -412,7 +412,7 @@ jQuery.extend({
}
// If there are functions bound, to execute
readyList.resolveWith( document, [ jQuery ] );
readyList.fireWith( document, [ jQuery ] );
// Trigger any bound ready events
if ( jQuery.fn.trigger ) {
@ -426,7 +426,7 @@ jQuery.extend({
return;
}
readyList = jQuery._Deferred();
readyList = jQuery.Callbacks( "once memory" );
// Catch cases where $(document).ready() is called after the
// browser event has already occurred.

229
src/deferred.js
View File

@ -1,169 +1,105 @@
(function( jQuery ) {
var // Promise methods
promiseMethods = "done fail isResolved isRejected promise then always pipe".split( " " ),
promiseMethods = "done fail progress isResolved isRejected promise then always pipe".split( " " ),
// Static reference to slice
sliceDeferred = [].slice;
jQuery.extend({
// Create a simple deferred (one callbacks list)
_Deferred: function() {
var // callbacks list
callbacks = [],
// stored [ context , args ]
fired,
// to avoid firing when already doing so
firing,
// flag to know if the deferred has been cancelled
cancelled,
// the deferred itself
deferred = {
// done( f1, f2, ...)
done: function() {
if ( !cancelled ) {
var args = arguments,
i,
length,
elem,
type,
_fired;
if ( fired ) {
_fired = fired;
fired = 0;
}
for ( i = 0, length = args.length; i < length; i++ ) {
elem = args[ i ];
type = jQuery.type( elem );
if ( type === "array" ) {
deferred.done.apply( deferred, elem );
} else if ( type === "function" ) {
callbacks.push( elem );
Deferred: function( func ) {
var doneList = jQuery.Callbacks( "once memory" ),
failList = jQuery.Callbacks( "once memory" ),
progressList = jQuery.Callbacks( "memory" ),
promise,
deferred = {
// Copy existing methods from lists
done: doneList.add,
removeDone: doneList.remove,
fail: failList.add,
removeFail: failList.remove,
progress: progressList.add,
removeProgress: progressList.remove,
resolve: doneList.fire,
resolveWith: doneList.fireWith,
reject: failList.fire,
rejectWith: failList.fireWith,
ping: progressList.fire,
pingWith: progressList.pingWith,
isResolved: doneList.fired,
isRejected: failList.fired,
// Create Deferred-specific methods
then: function( doneCallbacks, failCallbacks, progressCallbacks ) {
deferred.done( doneCallbacks ).fail( failCallbacks ).progress( progressCallbacks );
return this;
},
always: function() {
return deferred.done.apply( deferred, arguments ).fail.apply( this, arguments );
},
pipe: function( fnDone, fnFail, fnProgress ) {
return jQuery.Deferred(function( newDefer ) {
jQuery.each( {
done: [ fnDone, "resolve" ],
fail: [ fnFail, "reject" ],
progress: [ fnProgress, "ping" ]
}, function( handler, data ) {
var fn = data[ 0 ],
action = data[ 1 ],
returned;
if ( jQuery.isFunction( fn ) ) {
deferred[ handler ](function() {
returned = fn.apply( this, arguments );
if ( jQuery.isFunction( returned.promise ) ) {
returned.promise().then( newDefer.resolve, newDefer.reject, newDefer.ping );
} else {
newDefer[ action ]( returned );
}
});
} else {
deferred[ handler ]( newDefer[ action ] );
}
});
}).promise();
},
// Get a promise for this deferred
// If obj is provided, the promise aspect is added to the object
promise: function( obj ) {
if ( obj == null ) {
if ( promise ) {
return promise;
}
if ( _fired ) {
deferred.resolveWith( _fired[ 0 ], _fired[ 1 ] );
}
promise = obj = {};
}
return this;
},
// resolve with given context and args
resolveWith: function( context, args ) {
if ( !cancelled && !fired && !firing ) {
// make sure args are available (#8421)
args = args || [];
firing = 1;
try {
while( callbacks[ 0 ] ) {
callbacks.shift().apply( context, args );
}
}
finally {
fired = [ context, args ];
firing = 0;
}
var i = promiseMethods.length;
while( i-- ) {
obj[ promiseMethods[i] ] = deferred[ promiseMethods[i] ];
}
return this;
},
// resolve with this as context and given arguments
resolve: function() {
deferred.resolveWith( this, arguments );
return this;
},
// Has this deferred been resolved?
isResolved: function() {
return !!( firing || fired );
},
// Cancel
cancel: function() {
cancelled = 1;
callbacks = [];
return this;
return obj;
}
};
return deferred;
},
// Handle lists exclusiveness
deferred.done( failList.disable, progressList.lock )
.fail( doneList.disable, progressList.lock );
// Full fledged deferred (two callbacks list)
Deferred: function( func ) {
var deferred = jQuery._Deferred(),
failDeferred = jQuery._Deferred(),
promise;
// Add errorDeferred methods, then and promise
jQuery.extend( deferred, {
then: function( doneCallbacks, failCallbacks ) {
deferred.done( doneCallbacks ).fail( failCallbacks );
return this;
},
always: function() {
return deferred.done.apply( deferred, arguments ).fail.apply( this, arguments );
},
fail: failDeferred.done,
rejectWith: failDeferred.resolveWith,
reject: failDeferred.resolve,
isRejected: failDeferred.isResolved,
pipe: function( fnDone, fnFail ) {
return jQuery.Deferred(function( newDefer ) {
jQuery.each( {
done: [ fnDone, "resolve" ],
fail: [ fnFail, "reject" ]
}, function( handler, data ) {
var fn = data[ 0 ],
action = data[ 1 ],
returned;
if ( jQuery.isFunction( fn ) ) {
deferred[ handler ](function() {
returned = fn.apply( this, arguments );
if ( returned && jQuery.isFunction( returned.promise ) ) {
returned.promise().then( newDefer.resolve, newDefer.reject );
} else {
newDefer[ action ]( returned );
}
});
} else {
deferred[ handler ]( newDefer[ action ] );
}
});
}).promise();
},
// Get a promise for this deferred
// If obj is provided, the promise aspect is added to the object
promise: function( obj ) {
if ( obj == null ) {
if ( promise ) {
return promise;
}
promise = obj = {};
}
var i = promiseMethods.length;
while( i-- ) {
obj[ promiseMethods[i] ] = deferred[ promiseMethods[i] ];
}
return obj;
}
});
// Make sure only one callback list will be used
deferred.done( failDeferred.cancel ).fail( deferred.cancel );
// Unexpose cancel
delete deferred.cancel;
// Call given func if any
if ( func ) {
func.call( deferred, deferred );
}
// All done!
return deferred;
},
// Deferred helper
when: function( firstParam ) {
var args = arguments,
var args = sliceDeferred.call( arguments, 0 ),
i = 0,
length = args.length,
pValues = new Array( length ),
count = length,
pCount = length,
deferred = length <= 1 && firstParam && jQuery.isFunction( firstParam.promise ) ?
firstParam :
jQuery.Deferred();
@ -171,17 +107,22 @@ jQuery.extend({
return function( value ) {
args[ i ] = arguments.length > 1 ? sliceDeferred.call( arguments, 0 ) : value;
if ( !( --count ) ) {
// Strange bug in FF4:
// Values changed onto the arguments object sometimes end up as undefined values
// outside the $.when method. Cloning the object into a fresh array solves the issue
deferred.resolveWith( deferred, sliceDeferred.call( args, 0 ) );
deferred.resolveWith( deferred, args );
}
};
}
function progressFunc( i ) {
return function( value ) {
pValues[ i ] = arguments.length > 1 ? sliceDeferred.call( arguments, 0 ) : value;
if ( !( --count ) ) {
deferred.pingWith( deferred, pValue );
}
};
}
if ( length > 1 ) {
for( ; i < length; i++ ) {
if ( args[ i ] && jQuery.isFunction( args[ i ].promise ) ) {
args[ i ].promise().then( resolveFunc(i), deferred.reject );
if ( args[ i ] && args[ i ].promise && jQuery.isFunction( args[ i ].promise ) ) {
args[ i ].promise().then( resolveFunc(i), deferred.reject, progressFunc(i) );
} else {
--count;
}

16
src/queue.js
View File

@ -1,7 +1,7 @@
(function( jQuery ) {
function handleQueueMarkDefer( elem, type, src ) {
var deferDataKey = type + "defer",
function handleCBList( elem, type, src ) {
var deferDataKey = type + "cblst",
queueDataKey = type + "queue",
markDataKey = type + "mark",
defer = jQuery.data( elem, deferDataKey, undefined, true );
@ -14,7 +14,7 @@ function handleQueueMarkDefer( elem, type, src ) {
if ( !jQuery.data( elem, queueDataKey, undefined, true ) &&
!jQuery.data( elem, markDataKey, undefined, true ) ) {
jQuery.removeData( elem, deferDataKey, true );
defer.resolve();
defer.fireWith();
}
}, 0 );
}
@ -43,7 +43,7 @@ jQuery.extend({
jQuery.data( elem, key, count, true );
} else {
jQuery.removeData( elem, key, true );
handleQueueMarkDefer( elem, type, "mark" );
handleCBList( elem, type, "mark" );
}
}
},
@ -90,7 +90,7 @@ jQuery.extend({
if ( !queue.length ) {
jQuery.removeData( elem, type + "queue", true );
handleQueueMarkDefer( elem, type, "queue" );
handleCBList( elem, type, "queue" );
}
}
});
@ -146,7 +146,7 @@ jQuery.fn.extend({
elements = this,
i = elements.length,
count = 1,
deferDataKey = type + "defer",
deferDataKey = type + "cblst",
queueDataKey = type + "queue",
markDataKey = type + "mark",
tmp;
@ -159,9 +159,9 @@ jQuery.fn.extend({
if (( tmp = jQuery.data( elements[ i ], deferDataKey, undefined, true ) ||
( jQuery.data( elements[ i ], queueDataKey, undefined, true ) ||
jQuery.data( elements[ i ], markDataKey, undefined, true ) ) &&
jQuery.data( elements[ i ], deferDataKey, jQuery._Deferred(), true ) )) {
jQuery.data( elements[ i ], deferDataKey, jQuery.Callbacks( "once memory" ), true ) )) {
count++;
tmp.done( resolve );
tmp.add( resolve );
}
}
resolve();

2
test/data/offset/absolute.html
View File

@ -16,7 +16,7 @@
#positionTest { position: absolute; }
</style>
<script src="../../../src/core.js"></script>
<script src="../../../src/deferred.js"></script>
<script src="../../../src/callbacks.js"></script>
<script src="../../../src/support.js"></script>
<script src="../../../src/sizzle/sizzle.js"></script>
<script src="../../../src/sizzle-jquery.js"></script>

2
test/data/offset/body.html
View File

@ -9,7 +9,7 @@
#marker { position: absolute; border: 2px solid #000; width: 50px; height: 50px; background: #ccc; }
</style>
<script src="../../../src/core.js"></script>
<script src="../../../src/deferred.js"></script>
<script src="../../../src/callbacks.js"></script>
<script src="../../../src/support.js"></script>
<script src="../../../src/sizzle/sizzle.js"></script>
<script src="../../../src/sizzle-jquery.js"></script>

2
test/data/offset/fixed.html
View File

@ -13,7 +13,7 @@
#marker { position: absolute; border: 2px solid #000; width: 50px; height: 50px; background: #ccc; }
</style>
<script src="../../../src/core.js"></script>
<script src="../../../src/deferred.js"></script>
<script src="../../../src/callbacks.js"></script>
<script src="../../../src/support.js"></script>
<script src="../../../src/sizzle/sizzle.js"></script>
<script src="../../../src/sizzle-jquery.js"></script>

2
test/data/offset/relative.html
View File

@ -11,7 +11,7 @@
#marker { position: absolute; border: 2px solid #000; width: 50px; height: 50px; background: #ccc; }
</style>
<script src="../../../src/core.js"></script>
<script src="../../../src/deferred.js"></script>
<script src="../../../src/callbacks.js"></script>
<script src="../../../src/support.js"></script>
<script src="../../../src/sizzle/sizzle.js"></script>
<script src="../../../src/sizzle-jquery.js"></script>

2
test/data/offset/scroll.html
View File

@ -14,7 +14,7 @@
#marker { position: absolute; border: 2px solid #000; width: 50px; height: 50px; background: #ccc; }
</style>
<script src="../../../src/core.js"></script>
<script src="../../../src/deferred.js"></script>
<script src="../../../src/callbacks.js"></script>
<script src="../../../src/support.js"></script>
<script src="../../../src/sizzle/sizzle.js"></script>
<script src="../../../src/sizzle-jquery.js"></script>

2
test/data/offset/static.html
View File

@ -11,7 +11,7 @@
#marker { position: absolute; border: 2px solid #000; width: 50px; height: 50px; background: #ccc; }
</style>
<script src="../../../src/core.js"></script>
<script src="../../../src/deferred.js"></script>
<script src="../../../src/callbacks.js"></script>
<script src="../../../src/support.js"></script>
<script src="../../../src/sizzle/sizzle.js"></script>
<script src="../../../src/sizzle-jquery.js"></script>

2
test/data/offset/table.html
View File

@ -11,7 +11,7 @@
#marker { position: absolute; border: 2px solid #000; width: 50px; height: 50px; background: #ccc; }
</style>
<script src="../../../src/core.js"></script>
<script src="../../../src/deferred.js"></script>
<script src="../../../src/callbacks.js"></script>
<script src="../../../src/support.js"></script>
<script src="../../../src/sizzle/sizzle.js"></script>
<script src="../../../src/sizzle-jquery.js"></script>

4
test/index.html
View File

@ -9,6 +9,7 @@
<script src="data/testinit.js"></script>
<script src="../src/core.js"></script>
<script src="../src/callbacks.js"></script>
<script src="../src/deferred.js"></script>
<script src="../src/support.js"></script>
<script src="../src/data.js"></script>
@ -34,8 +35,9 @@
<script src="data/testrunner.js"></script>
<script src="unit/core.js"></script>
<script src="unit/support.js"></script>
<script src="unit/callbacks.js"></script>
<script src="unit/deferred.js"></script>
<script src="unit/support.js"></script>
<script src="unit/data.js"></script>
<script src="unit/queue.js"></script>
<script src="unit/attributes.js"></script>

106
test/unit/deferred.js
View File

@ -1,111 +1,5 @@
module("deferred", { teardown: moduleTeardown });
jQuery.each( [ "", " - new operator" ], function( _, withNew ) {
function createDeferred() {
return withNew ? new jQuery._Deferred() : jQuery._Deferred();
}
test("jQuery._Deferred" + withNew, function() {
expect( 11 );
var deferred,
object,
test;
deferred = createDeferred();
test = false;
deferred.done( function( value ) {
equals( value , "value" , "Test pre-resolve callback" );
test = true;
} );
deferred.resolve( "value" );
ok( test , "Test pre-resolve callbacks called right away" );
test = false;
deferred.done( function( value ) {
equals( value , "value" , "Test post-resolve callback" );
test = true;
} );
ok( test , "Test post-resolve callbacks called right away" );
deferred.cancel();
test = true;
deferred.done( function() {
ok( false , "Cancel was ignored" );
test = false;
} );
ok( test , "Test cancel" );
deferred = createDeferred().resolve();
try {
deferred.done( function() {
throw "Error";
} , function() {
ok( true , "Test deferred do not cancel on exception" );
} );
} catch( e ) {
strictEqual( e , "Error" , "Test deferred propagates exceptions");
deferred.done();
}
test = "";
deferred = createDeferred().done( function() {
test += "A";
}, function() {
test += "B";
} ).resolve();
strictEqual( test , "AB" , "Test multiple done parameters" );
test = "";
deferred.done( function() {
deferred.done( function() {
test += "C";
} );
test += "A";
}, function() {
test += "B";
} );
strictEqual( test , "ABC" , "Test done callbacks order" );
deferred = createDeferred();
deferred.resolveWith( jQuery , [ document ] ).done( function( doc ) {
ok( this === jQuery && arguments.length === 1 && doc === document , "Test fire context & args" );
});
// #8421
deferred = createDeferred();
deferred.resolveWith().done(function() {
ok( true, "Test resolveWith can be called with no argument" );
});
});
} );
jQuery.each( [ "", " - new operator" ], function( _, withNew ) {
function createDeferred( fn ) {