angular-scroll-animate
Version:
An Angular.js directive which allows you to perform any javascript actions (in the controller, or on the element) when an element is scrolled into, or out of, the users viewport, without any other dependencies.
55 lines (50 loc) • 1.9 kB
JavaScript
/**
* A block which waits for some condition to become true, with timeout.
*
* @constructor
* @extends jasmine.Block
* @param {jasmine.Env} env The Jasmine environment.
* @param {Number} timeout The maximum time in milliseconds to wait for the condition to become true.
* @param {Function} latchFunction A function which returns true when the desired condition has been met.
* @param {String} message The message to display if the desired condition hasn't been met within the given time period.
* @param {jasmine.Spec} spec The Jasmine spec.
*/
jasmine.WaitsForBlock = function(env, timeout, latchFunction, message, spec) {
this.timeout = timeout || env.defaultTimeoutInterval;
this.latchFunction = latchFunction;
this.message = message;
this.totalTimeSpentWaitingForLatch = 0;
jasmine.Block.call(this, env, null, spec);
};
jasmine.util.inherit(jasmine.WaitsForBlock, jasmine.Block);
jasmine.WaitsForBlock.TIMEOUT_INCREMENT = 10;
jasmine.WaitsForBlock.prototype.execute = function(onComplete) {
if (jasmine.VERBOSE) {
this.env.reporter.log('>> Jasmine waiting for ' + (this.message || 'something to happen'));
}
var latchFunctionResult;
try {
latchFunctionResult = this.latchFunction.apply(this.spec);
} catch (e) {
this.spec.fail(e);
onComplete();
return;
}
if (latchFunctionResult) {
onComplete();
} else if (this.totalTimeSpentWaitingForLatch >= this.timeout) {
var message = 'timed out after ' + this.timeout + ' msec waiting for ' + (this.message || 'something to happen');
this.spec.fail({
name: 'timeout',
message: message
});
this.abort = true;
onComplete();
} else {
this.totalTimeSpentWaitingForLatch += jasmine.WaitsForBlock.TIMEOUT_INCREMENT;
var self = this;
this.env.setTimeout(function() {
self.execute(onComplete);
}, jasmine.WaitsForBlock.TIMEOUT_INCREMENT);
}
};