https://www.rculturi.com/wp-content/plugins/magee-shortcodes/assets/js/jquery.waypoints_ver-2.0.5.js

3 Waypoints - v2.0.5
4Copyright (c) 2011-2014 Caleb Troughton
5Licensed under the MIT license.
6https://github.com/imakewebthings/jquery-waypoints/blob/master/licenses.txt
7*/
8
9
10(function() {
11  var __indexOf = [].indexOf || function(item) { for (var i = 0, l = this.length; i < l; i++) { if (i in this && this[i] === item) return i; } return -1; },
12    __slice = [].slice;
13
14  (function(root, factory) {
15    if (typeof define === 'function' && define.amd) {
16      return define('waypoints', ['jquery'], function($) {
17        return factory($, root);
18      });
19    } else {
20      return factory(root.jQuery, root);
21    }
22  })(window, function($, window) {
23    var $w, Context, Waypoint, allWaypoints, contextCounter, contextKey, contexts, isTouch, jQMethods, methods, resizeEvent, scrollEvent, waypointCounter, waypointKey, wp, wps;
24
25    $w = $(window);
26    isTouch = __indexOf.call(window, 'ontouchstart') >= 0;
27    allWaypoints = {
28      horizontal: {},
29      vertical: {}
30    };
31    contextCounter = 1;
32    contexts = {};
33    contextKey = 'waypoints-context-id';
34    resizeEvent = 'resize.waypoints';
35    scrollEvent = 'scroll.waypoints';
36    waypointCounter = 1;
37    waypointKey = 'waypoints-waypoint-ids';
38    wp = 'waypoint';
39    wps = 'waypoints';
40    Context = (function() {
41      function Context($element) {
42        var _this = this;
43
44        this.$element = $element;
45        this.element = $element[0];
46        this.didResize = false;
47        this.didScroll = false;
48        this.id = 'context' + contextCounter++;
49        this.oldScroll = {
50          x: $element.scrollLeft(),
51          y: $element.scrollTop()
52        };
53        this.waypoints = {
54          horizontal: {},
55          vertical: {}
56        };
57        this.element[contextKey] = this.id;
58        contexts[this.id] = this;
59        $element.bind(scrollEvent, function() {
60          var scrollHandler;
61
62          if (!(_this.didScroll || isTouch)) {
63            _this.didScroll = true;
64            scrollHandler = function() {
65              _this.doScroll();
66              return _this.didScroll = false;
67            };
68            return window.setTimeout(scrollHandler, $[wps].settings.scrollThrottle);
69          }
70        });
71        $element.bind(resizeEvent, function() {
72          var resizeHandler;
73
74          if (!_this.didResize) {
75            _this.didResize = true;
76            resizeHandler = function() {
77              $[wps]('refresh');
78              return _this.didResize = false;
79            };
80            return window.setTimeout(resizeHandler, $[wps].settings.resizeThrottle);
81          }
82        });
83      }
84
85      Context.prototype.doScroll = function() {
86        var axes,
87          _this = this;
88
89        axes = {
90          horizontal: {
91            newScroll: this.$element.scrollLeft(),
92            oldScroll: this.oldScroll.x,
93            forward: 'right',
94            backward: 'left'
95          },
96          vertical: {
97            newScroll: this.$element.scrollTop(),
98            oldScroll: this.oldScroll.y,
99            forward: 'down',
100            backward: 'up'
101          }
102        };
103        if (isTouch && (!axes.vertical.oldScroll || !axes.vertical.newScroll)) {
104          $[wps]('refresh');
105        }
106        $.each(axes, function(aKey, axis) {
107          var direction, isForward, triggered;
108
109          triggered = [];
110          isForward = axis.newScroll > axis.oldScroll;
111          direction = isForward ? axis.forward : axis.backward;
112          $.each(_this.waypoints[aKey], function(wKey, waypoint) {
113            var _ref, _ref1;
114
115            if ((axis.oldScroll < (_ref = waypoint.offset) && _ref <= axis.newScroll)) {
116              return triggered.push(waypoint);
117            } else if ((axis.newScroll < (_ref1 = waypoint.offset) && _ref1 <= axis.oldScroll)) {
118              return triggered.push(waypoint);
119            }
120          });
121          triggered.sort(function(a, b) {
122            return a.offset - b.offset;
123          });
124          if (!isForward) {
125            triggered.reverse();
126          }
127          return $.each(triggered, function(i, waypoint) {
128            if (waypoint.options.continuous || i === triggered.length - 1) {
129              return waypoint.trigger([direction]);
130            }
131          });
132        });
133        return this.oldScroll = {
134          x: axes.horizontal.newScroll,
135          y: axes.vertical.newScroll
136        };
137      };
138
139      Context.prototype.refresh = function() {
140        var axes, cOffset, isWin,
141          _this = this;
142
143        isWin = $.isWindow(this.element);
144        cOffset = this.$element.offset();
145        this.doScroll();
146        axes = {
147          horizontal: {
148            contextOffset: isWin ? 0 : cOffset.left,
149            contextScroll: isWin ? 0 : this.oldScroll.x,
150            contextDimension: this.$element.width(),
151            oldScroll: this.oldScroll.x,
152            forward: 'right',
153            backward: 'left',
154            offsetProp: 'left'
155          },
156          vertical: {
157            contextOffset: isWin ? 0 : cOffset.top,
158            contextScroll: isWin ? 0 : this.oldScroll.y,
159            contextDimension: isWin ? $[wps]('viewportHeight') : this.$element.height(),
160            oldScroll: this.oldScroll.y,
161            forward: 'down',
162            backward: 'up',
163            offsetProp: 'top'
164          }
165        };
166        return $.each(axes, function(aKey, axis) {
167          return $.each(_this.waypoints[aKey], function(i, waypoint) {
168            var adjustment, elementOffset, oldOffset, _ref, _ref1;
169
170            adjustment = waypoint.options.offset;
171            oldOffset = waypoint.offset;
172            elementOffset = $.isWindow(waypoint.element) ? 0 : waypoint.$element.offset()[axis.offsetProp];
173            if ($.isFunction(adjustment)) {
174              adjustment = adjustment.apply(waypoint.element);
175            } else if (typeof adjustment === 'string') {
176              adjustment = parseFloat(adjustment);
177              if (waypoint.options.offset.indexOf('%') > -1) {
178                adjustment = Math.ceil(axis.contextDimension * adjustment / 100);
179              }
180            }
181            waypoint.offset = elementOffset - axis.contextOffset + axis.contextScroll - adjustment;
182            if ((waypoint.options.onlyOnScroll && (oldOffset != null)) || !waypoint.enabled) {
183              return;
184            }
185            if (oldOffset !== null && (oldOffset < (_ref = axis.oldScroll) && _ref <= waypoint.offset)) {
186              return waypoint.trigger([axis.backward]);
187            } else if (oldOffset !== null && (oldOffset > (_ref1 = axis.oldScroll) && _ref1 >= waypoint.offset)) {
188              return waypoint.trigger([axis.forward]);
189            } else if (oldOffset === null && axis.oldScroll >= waypoint.offset) {
190              return waypoint.trigger([axis.forward]);
191            }
192          });
193        });
194      };
195
196      Context.prototype.checkEmpty = function() {
197        if ($.isEmptyObject(this.waypoints.horizontal) && $.isEmptyObject(this.waypoints.vertical)) {
198          this.$element.unbind([resizeEvent, scrollEvent].join(' '));
199          return delete contexts[this.id];
200        }
201      };
202
203      return Context;
204
205    })();
206    Waypoint = (function() {
207      function Waypoint($element, context, options) {
208        var idList, _ref;
209
210        if (options.offset === 'bottom-in-view') {
211          options.offset = function() {
212            var contextHeight;
213
214            contextHeight = $[wps]('viewportHeight');
215            if (!$.isWindow(context.element)) {
216              contextHeight = context.$element.height();
217            }
218            return contextHeight - $(this).outerHeight();
219          };
220        }
221        this.$element = $element;
222        this.element = $element[0];
223        this.axis = options.horizontal ? 'horizontal' : 'vertical';
224        this.callback = options.handler;
225        this.context = context;
226        this.enabled = options.enabled;
227        this.id = 'waypoints' + waypointCounter++;
228        this.offset = null;
229        this.options = options;
230        context.waypoints[this.axis][this.id] = this;
231        allWaypoints[this.axis][this.id] = this;
232        idList = (_ref = this.element[waypointKey]) != null ? _ref : [];
233        idList.push(this.id);
234        this.element[waypointKey] = idList;
235      }
236
237      Waypoint.prototype.trigger = function(args) {
238        if (!this.enabled) {
239          return;
240        }
241        if (this.callback != null) {
242          this.callback.apply(this.element, args);
243        }
244        if (this.options.triggerOnce) {
245          return this.destroy();
246        }
247      };
248
249      Waypoint.prototype.disable = function() {
250        return this.enabled = false;
251      };
252
253      Waypoint.prototype.enable = function() {
254        this.context.refresh();
255        return this.enabled = true;
256      };
257
258      Waypoint.prototype.destroy = function() {
259        delete allWaypoints[this.axis][this.id];
260        delete this.context.waypoints[this.axis][this.id];
261        return this.context.checkEmpty();
262      };
263
264      Waypoint.getWaypointsByElement = function(element) {
265        var all, ids;
266
267        ids = element[waypointKey];
268        if (!ids) {
269          return [];
270        }
271        all = $.extend({}, allWaypoints.horizontal, allWaypoints.vertical);
272        return $.map(ids, function(id) {
273          return all[id];
274        });
275      };
276
277      return Waypoint;
278
279    })();
280    methods = {
281      init: function(f, options) {
282        var _ref;
283
284        options = $.extend({}, $.fn[wp].defaults, options);
285        if ((_ref = options.handler) == null) {
286          options.handler = f;
287        }
288        this.each(function() {
289          var $this, context, contextElement, _ref1;
290
291          $this = $(this);
292          contextElement = (_ref1 = options.context) != null ? _ref1 : $.fn[wp].defaults.context;
293          if (!$.isWindow(contextElement)) {
294            contextElement = $this.closest(contextElement);
295          }
296          contextElement = $(contextElement);
297          context = contexts[contextElement[0][contextKey]];
298          if (!context) {
299            context = new Context(contextElement);
300          }
301          return new Waypoint($this, context, options);
302        });
303        $[wps]('refresh');
304        return this;
305      },
306      disable: function() {
307        return methods._invoke.call(this, 'disable');
308      },
309      enable: function() {
310        return methods._invoke.call(this, 'enable');
311      },
312      destroy: function() {
313        return methods._invoke.call(this, 'destroy');
314      },
315      prev: function(axis, selector) {
316        return methods._traverse.call(this, axis, selector, function(stack, index, waypoints) {
317          if (index > 0) {
318            return stack.push(waypoints[index - 1]);
319          }
320        });
321      },
322      next: function(axis, selector) {
323        return methods._traverse.call(this, axis, selector, function(stack, index, waypoints) {
324          if (index < waypoints.length - 1) {
325            return stack.push(waypoints[index + 1]);
326          }
327        });
328      },
329      _traverse: function(axis, selector, push) {
330        var stack, waypoints;
331
332        if (axis == null) {
333          axis = 'vertical';
334        }
335        if (selector == null) {
336          selector = window;
337        }
338        waypoints = jQMethods.aggregate(selector);
339        stack = [];
340        this.each(function() {
341          var index;
342
343          index = $.inArray(this, waypoints[axis]);
344          return push(stack, index, waypoints[axis]);
345        });
346        return this.pushStack(stack);
347      },
348      _invoke: function(method) {
349        this.each(function() {
350          var waypoints;
351
352          waypoints = Waypoint.getWaypointsByElement(this);
353          return $.each(waypoints, function(i, waypoint) {
354            waypoint[method]();
355            return true;
356          });
357        });
358        return this;
359      }
360    };
361    $.fn[wp] = function() {
362      var args, method;
363
364      method = arguments[0], args = 2 <= arguments.length ? __slice.call(arguments, 1) : [];
365      if (methods[method]) {
366        return methods[method].apply(this, args);
367      } else if ($.isFunction(method)) {
368        return methods.init.apply(this, arguments);
369      } else if ($.isPlainObject(method)) {
370        return methods.init.apply(this, [null, method]);
371      } else if (!method) {
372        return $.error("jQuery Waypoints needs a callback function or handler option.");
373      } else {
374        return $.error("The " + method + " method does not exist in jQuery Waypoints.");
375      }
376    };
377    $.fn[wp].defaults = {
378      context: window,
379      continuous: true,
380      enabled: true,
381      horizontal: false,
382      offset: 0,
383      triggerOnce: false
384    };
385    jQMethods = {
386      refresh: function() {
387        return $.each(contexts, function(i, context) {
388          return context.refresh();
389        });
390      },
391      viewportHeight: function() {
392        var _ref;
393
394        return (_ref = window.innerHeight) != null ? _ref : $w.height();
395      },
396      aggregate: function(contextSelector) {
397        var collection, waypoints, _ref;
398
399        collection = allWaypoints;
400        if (contextSelector) {
401          collection = (_ref = contexts[$(contextSelector)[0][contextKey]]) != null ? _ref.waypoints : void 0;
402        }
403        if (!collection) {
404          return [];
405        }
406        waypoints = {
407          horizontal: [],
408          vertical: []
409        };
410        $.each(waypoints, function(axis, arr) {
411          $.each(collection[axis], function(key, waypoint) {
412            return arr.push(waypoint);
413          });
414          arr.sort(function(a, b) {
415            return a.offset - b.offset;
416          });
417          waypoints[axis] = $.map(arr, function(waypoint) {
418            return waypoint.element;
419          });
420          return waypoints[axis] = $.unique(waypoints[axis]);
421        });
422        return waypoints;
423      },
424      above: function(contextSelector) {
425        if (contextSelector == null) {
426          contextSelector = window;
427        }
428        return jQMethods._filter(contextSelector, 'vertical', function(context, waypoint) {
429          return waypoint.offset <= context.oldScroll.y;
430        });
431      },
432      below: function(contextSelector) {
433        if (contextSelector == null) {
434          contextSelector = window;
435        }
436        return jQMethods._filter(contextSelector, 'vertical', function(context, waypoint) {
437          return waypoint.offset > context.oldScroll.y;
438        });
439      },
440      left: function(contextSelector) {
441        if (contextSelector == null) {
442          contextSelector = window;
443        }
444        return jQMethods._filter(contextSelector, 'horizontal', function(context, waypoint) {
445          return waypoint.offset <= context.oldScroll.x;
446        });
447      },
448      right: function(contextSelector) {
449        if (contextSelector == null) {
450          contextSelector = window;
451        }
452        return jQMethods._filter(contextSelector, 'horizontal', function(context, waypoint) {
453          return waypoint.offset > context.oldScroll.x;
454        });
455      },
456      enable: function() {
457        return jQMethods._invoke('enable');
458      },
459      disable: function() {
460        return jQMethods._invoke('disable');
461      },
462      destroy: function() {
463        return jQMethods._invoke('destroy');
464      },
465      extendFn: function(methodName, f) {
466        return methods[methodName] = f;
467      },
468      _invoke: function(method) {
469        var waypoints;
470
471        waypoints = $.extend({}, allWaypoints.vertical, allWaypoints.horizontal);
472        return $.each(waypoints, function(key, waypoint) {
473          waypoint[method]();
474          return true;
475        });
476      },
477      _filter: function(selector, axis, test) {
478        var context, waypoints;
479
480        context = contexts[$(selector)[0][contextKey]];
481        if (!context) {
482          return [];
483        }
484        waypoints = [];
485        $.each(context.waypoints[axis], function(i, waypoint) {
486          if (test(context, waypoint)) {
487            return waypoints.push(waypoint);
488          }
489        });
490        waypoints.sort(function(a, b) {
491          return a.offset - b.offset;
492        });
493        return $.map(waypoints, function(waypoint) {
494          return waypoint.element;
495        });
496      }
497    };
498    $[wps] = function() {
499      var args, method;
500
501      method = arguments[0], args = 2 <= arguments.length ? __slice.call(arguments, 1) : [];
502      if (jQMethods[method]) {
503        return jQMethods[method].apply(null, args);
504      } else {
505        return jQMethods.aggregate.call(null, method);
506      }
507    };
508    $[wps].settings = {
509      resizeThrottle: 100,
510      scrollThrottle: 30
511    };
512    return $w.on('load.waypoints', function() {
513      return $[wps]('refresh');
514    });
515  });
516
517}).call(this);