1 files changed, 75 insertions, 0 deletions
diff --git a/html/content/js/Utils/EventUtils.js b/html/content/js/Utils/EventUtils.js
new file mode 100644
index 0000000..21a1ce9
--- /dev/null
+++ b/html/content/js/Utils/EventUtils.js
@@ -0,0 +1,75 @@
+(function(){
+    var _ = {};
+    _.now = Date.now || function(){
+        return new Date().getTime();
+    };
+    // Returns a function, that, when invoked, will only be triggered at most once
+    // during a given window of time. Normally, the throttled function will run
+    // as much as it can, without ever going more than once per `wait` duration;
+    // but if you'd like to disable the execution on the leading edge, pass
+    // `{leading: false}`. To disable execution on the trailing edge, ditto.
+    _.throttle = function(func, wait, options) {
+        var context, args, result;
+        var timeout = null;
+        var previous = 0;
+        if (!options) options = {};
+        var later = function() {
+            previous = options.leading === false ? 0 : _.now();
+            timeout = null;
+            result = func.apply(context, args);
+            if (!timeout) context = args = null;
+        };
+        return function() {
+            var now = _.now();
+            if (!previous && options.leading === false) previous = now;
+            var remaining = wait - (now - previous);
+            context = this;
+            args = arguments;
+            if (remaining <= 0 || remaining > wait) {
+                if (timeout) {
+                    clearTimeout(timeout);
+                    timeout = null;
+                }
+                previous = now;
+                result = func.apply(context, args);
+                if (!timeout) context = args = null;
+            } else if (!timeout && options.trailing !== false) {
+                timeout = setTimeout(later, remaining);
+            }
+            return result;
+        };
+    };
+    // Returns a function, that, as long as it continues to be invoked, will not
+    // be triggered. The function will be called after it stops being called for
+    // N milliseconds. If `immediate` is passed, trigger the function on the
+    // leading edge, instead of the trailing.
+    _.debounce = function(func, wait, immediate) {
+        var timeout, args, context, timestamp, result;
+        var later = function() {
+            var last = _.now() - timestamp;
+            if (last < wait && last >= 0) {
+                timeout = setTimeout(later, wait - last);
+            } else {
+                timeout = null;
+                if (!immediate) {
+                    result = func.apply(context, args);
+                    if (!timeout) context = args = null;
+                }
+            }
+        };
+        return function() {
+            context = this;
+            args = arguments;
+            timestamp = _.now();
+            var callNow = immediate && !timeout;
+            if (!timeout) timeout = setTimeout(later, wait);
+            if (callNow) {
+                result = func.apply(context, args);
+                context = args = null;
+            }
+            return result;
+        };
+    };
+
+    window.EventUtils =  _;
+}());
+\ No newline at end of file