angular-cached-resource/app/bower_components/angular-strap/src/helpers/debounce.js

An AngularJS module to interact with RESTful resources, even when browser is offline

'use strict';

angular.module('mgcrea.ngStrap.helpers.debounce', [])

// @source jashkenas/underscore
// @url https://github.com/jashkenas/underscore/blob/1.5.2/underscore.js#L693
.constant('debounce', function(func, wait, immediate) {
  var timeout, args, context, timestamp, result;
  return function() {
    context = this;
    args = arguments;
    timestamp = new Date();
    var later = function() {
      var last = (new Date()) - timestamp;
      if (last < wait) {
        timeout = setTimeout(later, wait - last);
      } else {
        timeout = null;
        if (!immediate) result = func.apply(context, args);
      }
    };
    var callNow = immediate && !timeout;
    if (!timeout) {
      timeout = setTimeout(later, wait);
    }
    if (callNow) result = func.apply(context, args);
    return result;
  };
})


// @source jashkenas/underscore
// @url https://github.com/jashkenas/underscore/blob/1.5.2/underscore.js#L661
.constant('throttle', function(func, wait, options) {
  var context, args, result;
  var timeout = null;
  var previous = 0;
  options || (options = {});
  var later = function() {
    previous = options.leading === false ? 0 : new Date();
    timeout = null;
    result = func.apply(context, args);
  };
  return function() {
    var now = new Date();
    if (!previous && options.leading === false) previous = now;
    var remaining = wait - (now - previous);
    context = this;
    args = arguments;
    if (remaining <= 0) {
      clearTimeout(timeout);
      timeout = null;
      previous = now;
      result = func.apply(context, args);
    } else if (!timeout && options.trailing !== false) {
      timeout = setTimeout(later, remaining);
    }
    return result;
  };
});