export function suspendListeners(obj, eventNames, target, method, callback) {
if (!method && 'function' === typeof target) {
method = target;
target = null;
}
var suspendedActions = [],
actionsList = [],
eventName, actions, i, l;
for (i=0, l=eventNames.length; i<l; i++) {
eventName = eventNames[i];
actions = actionsFor(obj, eventName);
var actionIndex = indexOf(actions, target, method);
if (actionIndex !== -1) {
actions[actionIndex+2] |= SUSPENDED;
suspendedActions.push(actionIndex);
actionsList.push(actions);
}
}
function tryable() { return callback.call(target); }
function finalizer() {
for (var i = 0, l = suspendedActions.length; i < l; i++) {
var actionIndex = suspendedActions[i];
actionsList[i][actionIndex+2] &= ~SUSPENDED;
}
}
return tryFinally(tryable, finalizer);
}
QUnit.test("no failure, return from finally", function() {
finalizerResult = 'finalizer return value';
equal(tryFinally(tryable, finalizer), finalizerResult, 'crrect return value');
equal(tryCount, 1, 'tryable was called once');
equal(finalizeCount, 1, 'finalize was called once');
});
function callTryFinallyWithError() {
var errorWasThrown;
try {
tryFinally(tryable, finalizer);
} catch(e) {
errorWasThrown = true;
equal(e, error, 'correct error was thrown');
}
equal(errorWasThrown, true, 'error was thrown');
}
export function suspendListener(obj, eventName, target, method, callback) {
if (!method && 'function' === typeof target) {
method = target;
target = null;
}
var actions = actionsFor(obj, eventName);
var actionIndex = indexOf(actions, target, method);
if (actionIndex !== -1) {
actions[actionIndex+2] |= SUSPENDED; // mark the action as suspended
}
function tryable() { return callback.call(target); }
function finalizer() { if (actionIndex !== -1) { actions[actionIndex+2] &= ~SUSPENDED; } }
return tryFinally(tryable, finalizer);
}
QUnit.test("no failure", function() {
equal(tryFinally(tryable, finalizer), tryableResult, 'correct return value');
equal(tryCount, 1, 'tryable was called once');
equal(finalizeCount, 1, 'finalize was called once');
});
/**
Make a series of property changes together in an
exception-safe way.
```javascript
Ember.changeProperties(function() {
obj1.set('foo', mayBlowUpWhenSet);
obj2.set('bar', baz);
});
```
@method changeProperties
@param {Function} callback
@param [binding]
*/
function changeProperties(cb, binding) {
beginPropertyChanges();
tryFinally(cb, endPropertyChanges, binding);
}