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Add clearTimeout() implementation to Bluebird

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Necessary for cancellable promises
This commit is contained in:
Dan Stillman 2015-05-10 02:41:47 -04:00
parent 03da4a9d52
commit aa70e60fc6
1 changed files with 46 additions and 39 deletions
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85
resource/bluebird.js
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@ -35,47 +35,54 @@
// Set BackstagePass (which contains .Error, etc.) as global object // Set BackstagePass (which contains .Error, etc.) as global object
self = this; self = this;
// We need to maintain references to running nsITimers. Otherwise, they can
// get garbage collected before they fire. Also, we might need to cancel them.
var _runningTimers = {};
// Provide an implementation of setTimeout // Provide an implementation of setTimeout
self.setTimeout = new function() { self.setTimeout = function (func, ms) {
// We need to maintain references to running nsITimers. Otherwise, they can var id = Math.floor(Math.random() * (1000000000000 - 1)) + 1
// get garbage collected before they fire. var useMethodjit = Components.utils.methodjit;
var _runningTimers = []; var timer = Components.classes["@mozilla.org/timer;1"]
.createInstance(Components.interfaces.nsITimer);
return function setTimeout(func, ms) { timer.initWithCallback({"notify":function() {
var useMethodjit = Components.utils.methodjit; // Remove timer from object so it can be garbage collected
var timer = Components.classes["@mozilla.org/timer;1"] delete _runningTimers[id];
.createInstance(Components.interfaces.nsITimer);
timer.initWithCallback({"notify":function() { // Execute callback function
// Remove timer from array so it can be garbage collected try {
_runningTimers.splice(_runningTimers.indexOf(timer), 1); func();
} catch(err) {
// Execute callback function // Rethrow errors that occur so that they appear in the error
try { // console with the appropriate name and line numbers. While the
func(); // the errors appear without this, the line numbers get eaten.
} catch(err) { var scriptError = Components.classes["@mozilla.org/scripterror;1"]
// Rethrow errors that occur so that they appear in the error .createInstance(Components.interfaces.nsIScriptError);
// console with the appropriate name and line numbers. While the scriptError.init(
// the errors appear without this, the line numbers get eaten. err.message || err.toString(),
var scriptError = Components.classes["@mozilla.org/scripterror;1"] err.fileName || err.filename || null,
.createInstance(Components.interfaces.nsIScriptError); null,
scriptError.init( err.lineNumber || null,
err.message || err.toString(), null,
err.fileName || err.filename || null, scriptError.errorFlag,
null, 'component javascript'
err.lineNumber || null, );
null, Components.classes["@mozilla.org/consoleservice;1"]
scriptError.errorFlag, .getService(Components.interfaces.nsIConsoleService)
'component javascript' .logMessage(scriptError);
); self.debug(err.stack, 1);
Components.classes["@mozilla.org/consoleservice;1"] }
.getService(Components.interfaces.nsIConsoleService) }}, ms, Components.interfaces.nsITimer.TYPE_ONE_SHOT);
.logMessage(scriptError); _runningTimers[id] = timer;
self.debug(err.stack, 1); return id;
}
}}, ms, Components.interfaces.nsITimer.TYPE_ONE_SHOT);
_runningTimers.push(timer);
}
}; };
self.clearTimeout = function (id) {
var timer = _runningTimers[id];
if (timer) {
timer.cancel();
}
delete _runningTimers[id];
}
self.debug = function (msg) { self.debug = function (msg) {
dump(msg + "\n\n"); dump(msg + "\n\n");