71 lines
2.4 KiB
JavaScript
71 lines
2.4 KiB
JavaScript
|
|
(function() {
|
|
"use strict";
|
|
|
|
var WebWorld =
|
|
MACHINE.modules['whalesong/web-world/impl.rkt'].privateExports;
|
|
var EventSource = WebWorld.EventSource;
|
|
var EventHandler = WebWorld.EventHandler;
|
|
|
|
var makeClosure = plt.baselib.functions.makeClosure;
|
|
var makePrimitive = plt.baselib.functions.makePrimitive;
|
|
var finalizeClosureCall = plt.runtime.finalizeClosureCall;
|
|
|
|
var checkProcedure = plt.baselib.check.checkProcedure;
|
|
|
|
|
|
|
|
/**
|
|
* Creates an event source coupled to a JavaScript function. Calling the function
|
|
* should cause the event source to fire.
|
|
*/
|
|
var makeJsEventSource = function() {
|
|
var enabled = false;
|
|
var fireEvent;
|
|
|
|
var JsEventSource = function() {};
|
|
JsEventSource.prototype = plt.baselib.heir(EventSource.prototype);
|
|
JsEventSource.prototype.onStart = function(_fireEvent) {
|
|
enabled = true;
|
|
fireEvent = _fireEvent;
|
|
};
|
|
JsEventSource.prototype.onStop = function() {
|
|
enabled = false;
|
|
fireEvent = void(0);
|
|
};
|
|
|
|
var sender = function() {
|
|
if (enabled) {
|
|
var args = Array.prototype.slice.call(arguments, 0);
|
|
args.unshift(void(0));
|
|
fireEvent.apply(null, args);
|
|
}
|
|
};
|
|
return { eventSource: new JsEventSource(),
|
|
sender: sender };
|
|
};
|
|
|
|
|
|
var makeJsWorldEvent = makeClosure(
|
|
'make-js-world-event',
|
|
0,
|
|
function(M) {
|
|
var eventSourceRecord = makeJsEventSource();
|
|
eventSourceRecord.eventSource
|
|
var makeHandler = makePrimitive('make-js-world-event',
|
|
1,
|
|
function(M) {
|
|
var onEvent = checkProcedure(M, 'js-world-event-handler', 0);
|
|
return new EventHandler('js-world-event',
|
|
eventSourceRecord.eventSource,
|
|
onEvent);
|
|
});
|
|
finalizeClosureCall(M,
|
|
"first value",
|
|
eventSourceRecord.sender);
|
|
});
|
|
|
|
|
|
EXPORTS['make-js-world-event'] = makeJsWorldEvent;
|
|
|
|
}()); |