forked from jquery-archive/jquery-mobile
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scroll.js
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scroll.js
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//>>excludeStart("jqmBuildExclude", pragmas.jqmBuildExclude);
//>>description: Scroll events including: scrollstart, scrollstop
//>>label: Scroll
//>>group: Events
( function( factory ) {
if ( typeof define === "function" && define.amd ) {
// AMD. Register as an anonymous module.
define( [ "jquery" ], factory );
} else {
// Browser globals
factory( jQuery );
}
})( function( jQuery ) {
//>>excludeEnd("jqmBuildExclude");
(function( $, window, undefined ) {
var scrollEvent = "touchmove scroll";
// setup new event shortcuts
$.each( [ "scrollstart", "scrollstop" ], function( i, name ) {
$.fn[ name ] = function( fn ) {
return fn ? this.bind( name, fn ) : this.trigger( name );
};
// jQuery < 1.8
if ( $.attrFn ) {
$.attrFn[ name ] = true;
}
});
// also handles scrollstop
$.event.special.scrollstart = {
enabled: true,
setup: function() {
var thisObject = this,
$this = $( thisObject ),
scrolling,
timer;
function trigger( event, state ) {
var originalEventType = event.type;
scrolling = state;
event.type = scrolling ? "scrollstart" : "scrollstop";
$.event.dispatch.call( thisObject, event );
event.type = originalEventType;
}
// iPhone triggers scroll after a small delay; use touchmove instead
$this.bind( scrollEvent, function( event ) {
if ( !$.event.special.scrollstart.enabled ) {
return;
}
if ( !scrolling ) {
trigger( event, true );
}
clearTimeout( timer );
timer = setTimeout( function() {
trigger( event, false );
}, 50 );
});
},
teardown: function() {
$( this ).unbind( scrollEvent );
}
};
$.each({
scrollstop: "scrollstart"
}, function( event, sourceEvent ) {
$.event.special[ event ] = {
setup: function() {
$( this ).bind( sourceEvent, $.noop );
},
teardown: function() {
$( this ).unbind( sourceEvent );
}
};
});
})( jQuery, this );
//>>excludeStart("jqmBuildExclude", pragmas.jqmBuildExclude);
});
//>>excludeEnd("jqmBuildExclude");