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Add support for iOS Safari #23

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Add support for iOS Safari #23

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298d881
Added offset to the calculation of scrollFinish
bgutschke Apr 8, 2013
be05fe5
Removed trailing whitespace and tab.
bgutschke Apr 8, 2013
6f00f37
Add support for iOS devices
zamber Jun 3, 2013
fdbb9fe
Merge pull request #1 from bgutschke/master
zamber Jul 2, 2013
9bbbae3
Fix formatting
zamber Aug 16, 2013
6968dd4
Fix bottom stick iPad issue
zamber Aug 16, 2013
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69 changes: 44 additions & 25 deletions jquery.stickem.js
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,7 @@
* @version 1.4
*
* $('.container').stickem({
* item: '.stickem',
* item: '.stickem',
* container: '.stickem-container',
* stickClass: 'stickit',
* endStickClass: 'stickit-end',
Expand All @@ -16,12 +16,14 @@

;(function($, window, document, undefined) {

var IS_IOS = (navigator.userAgent.match(/(iPad|iPhone|iPod)/g) ? true : false);

var Stickem = function(elem, options) {
this.elem = elem;
this.$elem = $(elem);
this.options = options;
this.metadata = this.$elem.data("stickem-options");
this.$win = $(window);
this.$win = IS_IOS ? $(document) : $(window);
};

Stickem.prototype = {
Expand All @@ -39,7 +41,7 @@
init: function() {
var _self = this;

//Merge options
// merge options
_self.config = $.extend({}, _self.defaults, _self.options, _self.metadata);

_self.setWindowHeight();
Expand All @@ -51,16 +53,16 @@

bindEvents: function() {
var _self = this;

_self.$win.on('scroll.stickem', $.proxy(_self.handleScroll, _self));
_self.$win.on('resize.stickem', $.proxy(_self.handleResize, _self));
if (!IS_IOS) _self.$win.on('resize.stickem', $.proxy(_self.handleResize, _self));
},

destroy: function() {
var _self = this;

_self.$win.off('scroll.stickem');
_self.$win.off('resize.stickem');
if (!IS_IOS) _self.$win.off('resize.stickem');
},

getItem: function(index, element) {
Expand All @@ -70,10 +72,11 @@
$elem: $this,
elemHeight: $this.height(),
$container: $this.parents(_self.config.container),
isStuck: false
isStuck: false,
isStuckAtBottom: false
};

//If the element is smaller than the window
// if the element is smaller than the window
if(_self.windowHeight > item.elemHeight) {
item.containerHeight = item.$container.outerHeight();
item.containerInner = {
Expand All @@ -88,10 +91,18 @@
};

item.containerInnerHeight = item.$container.height();
item.containerStart = item.$container.offset().top - _self.config.offset + _self.config.start + item.containerInner.padding.top + item.containerInner.border.top;
item.scrollFinish = item.containerStart - _self.config.start + (item.containerInnerHeight - item.elemHeight);

//If the element is smaller than the container
item.containerStart = item.$container.offset().top
- _self.config.offset
+ _self.config.start
+ item.containerInner.padding.top
+ item.containerInner.border.top;
item.scrollFinish = item.containerStart
- _self.config.start
- _self.config.offset
+ (item.containerInnerHeight
- item.elemHeight);

// if the element is smaller than the container
if(item.containerInnerHeight > item.elemHeight) {
_self.items.push(item);
}
Expand Down Expand Up @@ -124,31 +135,39 @@
for(var i = 0, len = _self.items.length; i < len; i++) {
var item = _self.items[i];

//If it's stuck, and we need to unstick it
if(item.isStuck && (pos < item.containerStart || pos > item.scrollFinish)) {
// if it's stuck, and we need to unstick it
if(pos < item.containerStart || pos > item.scrollFinish) {
if (IS_IOS) {
if (item.isStuckAtBottom && pos < item.containerStart) {
item.$elem.removeClass(_self.config.endStickClass).addClass(_self.config.stickClass);
}
}

item.$elem.removeClass(_self.config.stickClass);

//only at the bottom
// only at the bottom
if(pos > item.scrollFinish) {
item.isStuckAtBottom = true;
item.$elem.addClass(_self.config.endStickClass);
}

item.isStuck = false;

//if supplied fire the onUnstick callback
// if supplied fire the onUnstick callback
if(_self.config.onUnstick) {
_self.config.onUnstick(item);
}

//If we need to stick it
} else if(item.isStuck === false && pos > item.containerStart && pos < item.scrollFinish) {
item.$elem.removeClass(_self.config.endStickClass).addClass(_self.config.stickClass);
item.isStuck = true;
// if we need to stick it
} else if(pos > item.containerStart &&
pos < item.scrollFinish) {
item.$elem.removeClass(_self.config.endStickClass).addClass(_self.config.stickClass);
item.isStuck = true;

//if supplied fire the onStick callback
if(_self.config.onStick) {
_self.config.onStick(item);
}
// if supplied fire the onStick callback
if(_self.config.onStick) {
_self.config.onStick(item);
}
}
}
}
Expand All @@ -164,7 +183,7 @@
Stickem.defaults = Stickem.prototype.defaults;

$.fn.stickem = function(options) {
//Create a destroy method so that you can kill it and call it again.
// create a destroy method so that you can kill it and call it again.
this.destroy = function() {
this.each(function() {
new Stickem(this, options).destroy();
Expand Down