-
Notifications
You must be signed in to change notification settings - Fork 0
/
jquery.liquidSlider.js
256 lines (224 loc) · 11.2 KB
/
jquery.liquidSlider.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
/*
* LiquidSlider - jQuery Plugin
* Slider plugin to provide flexible dimensions (both width and height)
* according to current item content on each slide step.
*
* Copyright (c) 2013 Alex Vanyan (http://alex-v.net)
* Version: 2.1
* Requires: jQuery v1.4.2+
*
*/
;(function($) {
$.fn.liquidSlider = function(options) {
return this.each(function() {
// default options: do not change!
var defaults = {
initialResizeSpeed: 100,
resizeSpeed: 100,
slideSpeed: 150,
navigation: true,
removeNavOnLastSlide: true,
prevButtonLabel: "",
nextButtonLabel: "",
contentSelectors: "img, iframe",
mobile: {
swipe: false
},
onLoad: null,
onContentItemLoad: null,
onNextSlide: null,
onPrevSlide: null,
onSlideChange: null,
onBeforeNextSlide: null,
onBeforePrevSlide: null,
onBeforeSlideChange: null
};
var opts = $.extend( {}, defaults, options );
var $this = $(this);
// constructor
var init = function(opts, $this) {
var firstSlideIndex = 0;
var sliderWrapper = $this.wrap( $("<div />").attr("class", "liquid-wrap") ).parent();
var slideWrappers = $this.children();
var sliderContentItems = $this.children().find(opts.contentSelectors);
var isInitialized = false;
// attach the onLoad event handler to the slider content items
var scLength = sliderContentItems.not(function() { return this.complete; })
.bind("load", function() {
if ( typeof opts.onContentItemLoad === "function" ) opts.onContentItemLoad.call($(this));
if ( --scLength === 0 ) checkStartInit();
}).length;
var currentSlideWrap = slideWrappers.eq(firstSlideIndex);
var currentSlideContentItem = currentSlideWrap.find(opts.contentSelectors);
// set current slide (attribute data-cslide to the top-level parent) to 1st set slide
sliderWrapper.attr("data-cslide", parseInt(firstSlideIndex) + 1);
slideWrappers.eq(parseInt(firstSlideIndex)).addClass("active");
// slideshow wrapper and slide css goes here...
$this.css({
margin: 0,
padding: 0,
listStyle: "none",
position: "absolute",
top: 0,
left: 0,
width: $(window).width()
});
slideWrappers.css({
float: "left",
margin: 0,
padding: 0
});
// allow slider to preload before being shown
sliderWrapper.css({
position: "absolute",
left: "-50000px",
top: "-50000px"
});
var checkStartInit = function() {
isInitialized = true;
checkSlidesWrapperWidth();
sliderWrapper.css({
position: "relative",
overflow: "hidden",
left: "auto",
top: "auto",
margin: 0,
padding: 0
});
// auto-resize the slider for the 1st set slide
resizeTo(opts.initialResizeSpeed, sliderWrapper, firstSlideIndex);
// check if "navigation" option is enabled to add next/prev buttons
if ( true === opts.navigation ) addNavigation(opts, sliderWrapper);
if ( true === opts.mobile.swipe ) addMobileTriggers(opts, sliderWrapper);
slideIndexCheck(sliderWrapper);
if ( typeof opts.onLoad === "function" ) opts.onLoad.call($this);
};
if ( scLength === 0 && ! isInitialized ) checkStartInit();
};
var checkSlidesWrapperWidth = function() {
var childrenWidth = 0;
$this.children().each(function() {
childrenWidth += $(this).outerWidth(true);
});
$this.css("width", childrenWidth + 1);
};
// default $.animate() begin and callback hooks
var defaultAnimBegin = function() {};
var defaultAnimCallback = function() {};
// helper method: resizes slide scope to slide with index "slideIndex" with "speed" milliseconds
var resizeTo = function(speed, sliderWrapper, slideIndex) {
var slidesWrapper = sliderWrapper.children().eq(0);
var contentItem = slidesWrapper.children().eq(slideIndex);
defaultAnimBegin.call(slidesWrapper);
sliderWrapper.animate({
width: contentItem.outerWidth(),
height: contentItem.outerHeight()
}, parseInt(speed), function() {
defaultAnimCallback.call(slidesWrapper);
});
};
// method to add prev/next buttons to the slider
var addNavigation = function(opts, sliderWrapper) {
// attach previous navigation button
$('<a class="liquid-prev" href="#">' + opts.prevButtonLabel + '</a>').bind("click", function(e) {
e.preventDefault();
navigateToSlide( opts, sliderWrapper, -1 );
}).insertBefore(sliderWrapper);
// attach next navigation button
$('<a class="liquid-next" href="#">' + opts.nextButtonLabel + '</a>').bind("click", function(e) {
e.preventDefault();
navigateToSlide( opts, sliderWrapper, 1 );
}).insertAfter(sliderWrapper);
};
// method to add jQUery triggers for mobile devices
var addMobileTriggers = function(opts, sliderWrapper) {
if ( $.mobile ) {
$this.bind("swiperight", function(e) {
e.preventDefault();
navigateToSlide( opts, sliderWrapper, -1 );
});
$this.bind("swipeleft", function(e) {
e.preventDefault();
navigateToSlide( opts, sliderWrapper, 1 );
});
}
};
// slide nagivation generic function - direction depends on "delta" var
var navigateToSlide = function(opts, sliderWrapper, delta) {
var slidesWrapper = sliderWrapper.children().eq(0);
var currentSlideIndex = parseInt(sliderWrapper.attr("data-cslide")) - 1;
var upcomingSlideIndex = (currentSlideIndex + (delta * 1));
// callback variables
var navName = (-1 === delta ? "Prev" : "Next");
var beforeCb = opts['onBefore' + navName + 'Slide'];
var afterCb = opts['on' + navName + 'Slide'];
var gBeforeCb = opts.onBeforeSlideChange;
var gAfterCb = opts.onSlideChange;
// check if the upcoming slide exists and return "false" if it does not
if ( upcomingSlideIndex > slidesWrapper.children().length - 1 || upcomingSlideIndex < 0 ) return false;
// pre-animation callbacks
if ( typeof gBeforeCb === "function" ) gBeforeCb.call(slidesWrapper);
if ( typeof beforeCb === "function" ) beforeCb.call(slidesWrapper);
// next/prev animation is processed here...
defaultAnimBegin.call(slidesWrapper);
slidesWrapper.animate({
left: "-" + (slidesWrapper.children().eq(upcomingSlideIndex).offset().left - slidesWrapper.offset().left)
}, opts.slideSpeed, function() {
var newCurrentSlideIndex = upcomingSlideIndex + 1;
// set current slide index attribute to the wrapper after slide navigation is complete
sliderWrapper.attr("data-cslide", newCurrentSlideIndex);
slideIndexCheck(sliderWrapper);
slidesWrapper.children().removeClass("active").eq(newCurrentSlideIndex - 1).addClass("active");
// post-animation callbacks
if ( typeof gAfterCb === "function" ) gAfterCb.call(slidesWrapper);
if ( typeof afterCb === "function" ) afterCb.call(slidesWrapper);
defaultAnimCallback.call(slidesWrapper);
});
// start resizing the slide scope in a parallel way to the next/prev animation
resizeTo(opts.resizeSpeed, slidesWrapper.parent(), upcomingSlideIndex);
};
var slideIndexCheck = function(sliderWrapper) {
if ( true === opts.removeNavOnLastSlide ) {
switch ( parseInt(sliderWrapper.attr("data-cslide")) ) {
case 1:
sliderWrapper.prev(".liquid-prev").hide();
break;
case sliderWrapper.children().eq(0).children().length:
sliderWrapper.next(".liquid-next").hide();
break;
default:
sliderWrapper.prev(".liquid-prev").show();
sliderWrapper.next(".liquid-next").show();
break;
}
}
};
// check to see if no element exists in DOM by the time plugin was called
if ( ! $this.length ) {
// if not check the browser to have a console in window top-level object
if ( typeof window.console !== "undefined" ) {
// raise some error here
console.log("liquidSlider() cannot be called on a non-existing element [should be called like $('.example').liquidSlider()]");
}
return false;
}
// everything starts here...
init(opts, $this);
// responsive design compatibility
// (width and offset change on window resize)
var resizeTimeout;
$(window).bind("resize", function() {
clearTimeout(resizeTimeout);
resizeTimeout = setTimeout(resizeHandler, 250);
});
var resizeHandler = function() {
var sliderWrapper = $this.parent();
var cSlide = parseInt(sliderWrapper.attr("data-cslide"));
var cSlideObj = $this.children().eq(cSlide - 1);
checkSlidesWrapperWidth();
$this.css("left", ("-" + (cSlideObj.offset().left - $this.offset().left)) + "px");
sliderWrapper.width(cSlideObj.outerWidth());
};
});
};
})(jQuery);