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// Generated by CoffeeScript 1.6.2
/*
jQuery Waypoints - v2.0.3
Copyright (c) 2011-2013 Caleb Troughton
Dual licensed under the MIT license and GPL license.
https://github.com/imakewebthings/jquery-waypoints/blob/master/licenses.txt
*/
(function() {
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; },
__slice = [].slice;
(function(root, factory) {
if (typeof define === 'function' && define.amd) {
return define('waypoints', ['jquery'], function($) {
return factory($, root);
});
} else {
return factory(root.jQuery, root);
}
})(this, function($, window) {
var $w, Context, Waypoint, allWaypoints, contextCounter, contextKey, contexts, isTouch, jQMethods, methods, resizeEvent, scrollEvent, waypointCounter, waypointKey, wp, wps;
$w = $(window);
isTouch = __indexOf.call(window, 'ontouchstart') >= 0;
allWaypoints = {
horizontal: {},
vertical: {}
};
contextCounter = 1;
contexts = {};
contextKey = 'waypoints-context-id';
resizeEvent = 'resize.waypoints';
scrollEvent = 'scroll.waypoints';
waypointCounter = 1;
waypointKey = 'waypoints-waypoint-ids';
wp = 'waypoint';
wps = 'waypoints';
Context = (function() {
function Context($element) {
var _this = this;
this.$element = $element;
this.element = $element[0];
this.didResize = false;
this.didScroll = false;
this.id = 'context' + contextCounter++;
this.oldScroll = {
x: $element.scrollLeft(),
y: $element.scrollTop()
};
this.waypoints = {
horizontal: {},
vertical: {}
};
$element.data(contextKey, this.id);
contexts[this.id] = this;
$element.bind(scrollEvent, function() {
var scrollHandler;
if (!(_this.didScroll || isTouch)) {
_this.didScroll = true;
scrollHandler = function() {
_this.doScroll();
return _this.didScroll = false;
};
return window.setTimeout(scrollHandler, $[wps].settings.scrollThrottle);
}
});
$element.bind(resizeEvent, function() {
var resizeHandler;
if (!_this.didResize) {
_this.didResize = true;
resizeHandler = function() {
$[wps]('refresh');
return _this.didResize = false;
};
return window.setTimeout(resizeHandler, $[wps].settings.resizeThrottle);
}
});
}
Context.prototype.doScroll = function() {
var axes,
_this = this;
axes = {
horizontal: {
newScroll: this.$element.scrollLeft(),
oldScroll: this.oldScroll.x,
forward: 'right',
backward: 'left'
},
vertical: {
newScroll: this.$element.scrollTop(),
oldScroll: this.oldScroll.y,
forward: 'down',
backward: 'up'
}
};
if (isTouch && (!axes.vertical.oldScroll || !axes.vertical.newScroll)) {
$[wps]('refresh');
}
$.each(axes, function(aKey, axis) {
var direction, isForward, triggered;
triggered = [];
isForward = axis.newScroll > axis.oldScroll;
direction = isForward ? axis.forward : axis.backward;
$.each(_this.waypoints[aKey], function(wKey, waypoint) {
var _ref, _ref1;
if ((axis.oldScroll < (_ref = waypoint.offset) && _ref <= axis.newScroll)) {
return triggered.push(waypoint);
} else if ((axis.newScroll < (_ref1 = waypoint.offset) && _ref1 <= axis.oldScroll)) {
return triggered.push(waypoint);
}
});
triggered.sort(function(a, b) {
return a.offset - b.offset;
});
if (!isForward) {
triggered.reverse();
}
return $.each(triggered, function(i, waypoint) {
if (waypoint.options.continuous || i === triggered.length - 1) {
return waypoint.trigger([direction]);
}
});
});
return this.oldScroll = {
x: axes.horizontal.newScroll,
y: axes.vertical.newScroll
};
};
Context.prototype.refresh = function() {
var axes, cOffset, isWin,
_this = this;
isWin = $.isWindow(this.element);
cOffset = this.$element.offset();
this.doScroll();
axes = {
horizontal: {
contextOffset: isWin ? 0 : cOffset.left,
contextScroll: isWin ? 0 : this.oldScroll.x,
contextDimension: this.$element.width(),
oldScroll: this.oldScroll.x,
forward: 'right',
backward: 'left',
offsetProp: 'left'
},
vertical: {
contextOffset: isWin ? 0 : cOffset.top,
contextScroll: isWin ? 0 : this.oldScroll.y,
contextDimension: isWin ? $[wps]('viewportHeight') : this.$element.height(),
oldScroll: this.oldScroll.y,
forward: 'down',
backward: 'up',
offsetProp: 'top'
}
};
return $.each(axes, function(aKey, axis) {
return $.each(_this.waypoints[aKey], function(i, waypoint) {
var adjustment, elementOffset, oldOffset, _ref, _ref1;
adjustment = waypoint.options.offset;
oldOffset = waypoint.offset;
elementOffset = $.isWindow(waypoint.element) ? 0 : waypoint.$element.offset()[axis.offsetProp];
if ($.isFunction(adjustment)) {
adjustment = adjustment.apply(waypoint.element);
} else if (typeof adjustment === 'string') {
adjustment = parseFloat(adjustment);
if (waypoint.options.offset.indexOf('%') > -1) {
adjustment = Math.ceil(axis.contextDimension * adjustment / 100);
}
}
waypoint.offset = elementOffset - axis.contextOffset + axis.contextScroll - adjustment;
if ((waypoint.options.onlyOnScroll && (oldOffset != null)) || !waypoint.enabled) {
return;
}
if (oldOffset !== null && (oldOffset < (_ref = axis.oldScroll) && _ref <= waypoint.offset)) {
return waypoint.trigger([axis.backward]);
} else if (oldOffset !== null && (oldOffset > (_ref1 = axis.oldScroll) && _ref1 >= waypoint.offset)) {
return waypoint.trigger([axis.forward]);
} else if (oldOffset === null && axis.oldScroll >= waypoint.offset) {
return waypoint.trigger([axis.forward]);
}
});
});
};
Context.prototype.checkEmpty = function() {
if ($.isEmptyObject(this.waypoints.horizontal) && $.isEmptyObject(this.waypoints.vertical)) {
this.$element.unbind([resizeEvent, scrollEvent].join(' '));
return delete contexts[this.id];
}
};
return Context;
})();
Waypoint = (function() {
function Waypoint($element, context, options) {
var idList, _ref;
options = $.extend({}, $.fn[wp].defaults, options);
if (options.offset === 'bottom-in-view') {
options.offset = function() {
var contextHeight;
contextHeight = $[wps]('viewportHeight');
if (!$.isWindow(context.element)) {
contextHeight = context.$element.height();
}
return contextHeight - $(this).outerHeight();
};
}
this.$element = $element;
this.element = $element[0];
this.axis = options.horizontal ? 'horizontal' : 'vertical';
this.callback = options.handler;
this.context = context;
this.enabled = options.enabled;
this.id = 'waypoints' + waypointCounter++;
this.offset = null;
this.options = options;
context.waypoints[this.axis][this.id] = this;
allWaypoints[this.axis][this.id] = this;
idList = (_ref = $element.data(waypointKey)) != null ? _ref : [];
idList.push(this.id);
$element.data(waypointKey, idList);
}
Waypoint.prototype.trigger = function(args) {
if (!this.enabled) {
return;
}
if (this.callback != null) {
this.callback.apply(this.element, args);
}
if (this.options.triggerOnce) {
return this.destroy();
}
};
Waypoint.prototype.disable = function() {
return this.enabled = false;
};
Waypoint.prototype.enable = function() {
this.context.refresh();
return this.enabled = true;
};
Waypoint.prototype.destroy = function() {
delete allWaypoints[this.axis][this.id];
delete this.context.waypoints[this.axis][this.id];
return this.context.checkEmpty();
};
Waypoint.getWaypointsByElement = function(element) {
var all, ids;
ids = $(element).data(waypointKey);
if (!ids) {
return [];
}
all = $.extend({}, allWaypoints.horizontal, allWaypoints.vertical);
return $.map(ids, function(id) {
return all[id];
});
};
return Waypoint;
})();
methods = {
init: function(f, options) {
var _ref;
if (options == null) {
options = {};
}
if ((_ref = options.handler) == null) {
options.handler = f;
}
this.each(function() {
var $this, context, contextElement, _ref1;
$this = $(this);
contextElement = (_ref1 = options.context) != null ? _ref1 : $.fn[wp].defaults.context;
if (!$.isWindow(contextElement)) {
contextElement = $this.closest(contextElement);
}
contextElement = $(contextElement);
context = contexts[contextElement.data(contextKey)];
if (!context) {
context = new Context(contextElement);
}
return new Waypoint($this, context, options);
});
$[wps]('refresh');
return this;
},
disable: function() {
return methods._invoke(this, 'disable');
},
enable: function() {
return methods._invoke(this, 'enable');
},
destroy: function() {
return methods._invoke(this, 'destroy');
},
prev: function(axis, selector) {
return methods._traverse.call(this, axis, selector, function(stack, index, waypoints) {
if (index > 0) {
return stack.push(waypoints[index - 1]);
}
});
},
next: function(axis, selector) {
return methods._traverse.call(this, axis, selector, function(stack, index, waypoints) {
if (index < waypoints.length - 1) {
return stack.push(waypoints[index + 1]);
}
});
},
_traverse: function(axis, selector, push) {
var stack, waypoints;
if (axis == null) {
axis = 'vertical';
}
if (selector == null) {
selector = window;
}
waypoints = jQMethods.aggregate(selector);
stack = [];
this.each(function() {
var index;
index = $.inArray(this, waypoints[axis]);
return push(stack, index, waypoints[axis]);
});
return this.pushStack(stack);
},
_invoke: function($elements, method) {
$elements.each(function() {
var waypoints;
waypoints = Waypoint.getWaypointsByElement(this);
return $.each(waypoints, function(i, waypoint) {
waypoint[method]();
return true;
});
});
return this;
}
};
$.fn[wp] = function() {
var args, method;
method = arguments[0], args = 2 <= arguments.length ? __slice.call(arguments, 1) : [];
if (methods[method]) {
return methods[method].apply(this, args);
} else if ($.isFunction(method)) {
return methods.init.apply(this, arguments);
} else if ($.isPlainObject(method)) {
return methods.init.apply(this, [null, method]);
} else if (!method) {
return $.error("jQuery Waypoints needs a callback function or handler option.");
} else {
return $.error("The " + method + " method does not exist in jQuery Waypoints.");
}
};
$.fn[wp].defaults = {
context: window,
continuous: true,
enabled: true,
horizontal: false,
offset: 0,
triggerOnce: false
};
jQMethods = {
refresh: function() {
return $.each(contexts, function(i, context) {
return context.refresh();
});
},
viewportHeight: function() {
var _ref;
return (_ref = window.innerHeight) != null ? _ref : $w.height();
},
aggregate: function(contextSelector) {
var collection, waypoints, _ref;
collection = allWaypoints;
if (contextSelector) {
collection = (_ref = contexts[$(contextSelector).data(contextKey)]) != null ? _ref.waypoints : void 0;
}
if (!collection) {
return [];
}
waypoints = {
horizontal: [],
vertical: []
};
$.each(waypoints, function(axis, arr) {
$.each(collection[axis], function(key, waypoint) {
return arr.push(waypoint);
});
arr.sort(function(a, b) {
return a.offset - b.offset;
});
waypoints[axis] = $.map(arr, function(waypoint) {
return waypoint.element;
});
return waypoints[axis] = $.unique(waypoints[axis]);
});
return waypoints;
},
above: function(contextSelector) {
if (contextSelector == null) {
contextSelector = window;
}
return jQMethods._filter(contextSelector, 'vertical', function(context, waypoint) {
return waypoint.offset <= context.oldScroll.y;
});
},
below: function(contextSelector) {
if (contextSelector == null) {
contextSelector = window;
}
return jQMethods._filter(contextSelector, 'vertical', function(context, waypoint) {
return waypoint.offset > context.oldScroll.y;
});
},
left: function(contextSelector) {
if (contextSelector == null) {
contextSelector = window;
}
return jQMethods._filter(contextSelector, 'horizontal', function(context, waypoint) {
return waypoint.offset <= context.oldScroll.x;
});
},
right: function(contextSelector) {
if (contextSelector == null) {
contextSelector = window;
}
return jQMethods._filter(contextSelector, 'horizontal', function(context, waypoint) {
return waypoint.offset > context.oldScroll.x;
});
},
enable: function() {
return jQMethods._invoke('enable');
},
disable: function() {
return jQMethods._invoke('disable');
},
destroy: function() {
return jQMethods._invoke('destroy');
},
extendFn: function(methodName, f) {
return methods[methodName] = f;
},
_invoke: function(method) {
var waypoints;
waypoints = $.extend({}, allWaypoints.vertical, allWaypoints.horizontal);
return $.each(waypoints, function(key, waypoint) {
waypoint[method]();
return true;
});
},
_filter: function(selector, axis, test) {
var context, waypoints;
context = contexts[$(selector).data(contextKey)];
if (!context) {
return [];
}
waypoints = [];
$.each(context.waypoints[axis], function(i, waypoint) {
if (test(context, waypoint)) {
return waypoints.push(waypoint);
}
});
waypoints.sort(function(a, b) {
return a.offset - b.offset;
});
return $.map(waypoints, function(waypoint) {
return waypoint.element;
});
}
};
$[wps] = function() {
var args, method;
method = arguments[0], args = 2 <= arguments.length ? __slice.call(arguments, 1) : [];
if (jQMethods[method]) {
return jQMethods[method].apply(null, args);
} else {
return jQMethods.aggregate.call(null, method);
}
};
$[wps].settings = {
resizeThrottle: 100,
scrollThrottle: 30
};
return $w.load(function() {
return $[wps]('refresh');
});
});
}).call(this);