var DEFAULTS = {
target: '', //target元素的jq选择器
type: 'top', //固定的位置，top | bottom，默认为top，表示固定在顶部
wait: 5, //scroll事件回调的间隔
stickyOffset: 0, //固定时距离浏览器可视区顶部或底部的偏移，用来设置top跟bottom属性的值，默认为0
isFixedWidth: true, //sticky元素宽度是否固定，默认为true，如果是自适应的宽度，需设置为false
getStickyWidth: undefined, //用来获取sticky元素宽度的回调，在不传该参数的情况下，stickyWidth将设置为sticky元素的offsetWidth
unStickyDistance: undefined, //该参数决定sticky元素何时进入dynamicSticky状态
onSticky: undefined, ///sticky元素固定时的回调
onUnSticky: undefined ///sticky元素取消固定时的回调
};

!opts.isFixedWidth && $win.resize(throttle(function () {
setStickyWidth();
$elem.hasClass(className) && $elem.css('width', stickyWidth);
sticky();
}, opts.wait));

setSticky = function () {
!$elem.hasClass(className) && $elem.addClass(className).css('width', stickyWidth)
&& (typeof opts.onSticky == 'function' && opts.onSticky($elem, $target));
return true;
},
states = {
staticSticky: function () {
setSticky() && $elem.css(opts.type, opts.stickyOffset);
},
dynamicSticky: function (rect) {
setSticky() && $elem.css(opts.type, rules[opts.type].getDynamicOffset(rect));
},
unSticky: function () {
$elem.hasClass(className) && $elem.removeClass(className).css('width', '').css(opts.type, '')
&& (typeof opts.onUnSticky == 'function' && opts.onUnSticky($elem, $target));
}
},
rules = {
top: {
getState: function (rect) {
if (rect.top < 0 && (rect.bottom - unStickyDistance) > 0) return 'staticSticky';
else if ((rect.bottom - unStickyDistance) <= 0 && rect.bottom > 0) return 'dynamicSticky';
else return 'unSticky';
},
getDynamicOffset: function (rect) {
return -(unStickyDistance - rect.bottom);
}
},
bottom: {
getState: function (rect) {
if (rect.bottom > docClientHeight && (rect.top + unStickyDistance) < docClientHeight) return 'staticSticky';
else if ((rect.top + unStickyDistance) >= docClientHeight && rect.top < docClientHeight) return 'dynamicSticky';
else return 'unSticky';
},
getDynamicOffset: function (rect) {
return -(unStickyDistance + rect.top - docClientHeight);
}
}
}
$win.scroll(throttle(sticky, opts.wait));
function sticky() {
var rect = $target[0].getBoundingClientRect(),
curState = rules[opts.type].getState(rect);
states[curState](rect);
}

var Sticky = (function ($) {
function throttle(func, wait) {
var timer = null;
return function () {
var self = this, args = arguments;
if (timer) clearTimeout(timer);
timer = setTimeout(function () {
return typeof func === 'function' && func.apply(self, args);
}, wait);
}
}
var DEFAULTS = {
target: '', //target元素的jq选择器
type: 'top', //固定的位置，top | bottom，默认为top，表示固定在顶部
wait: 5, //scroll事件回调的间隔
stickyOffset: 0, //固定时距离浏览器可视区顶部或底部的偏移，用来设置top跟bottom属性的值，默认为0
isFixedWidth: true, //sticky元素宽度是否固定，默认为true，如果是自适应的宽度，需设置为false
getStickyWidth: undefined, //用来获取sticky元素宽度的回调，在不传该参数的情况下，stickyWidth将设置为sticky元素的offsetWidth
unStickyDistance: undefined, //该参数决定sticky元素何时进入dynamicSticky状态
onSticky: undefined, ///sticky元素固定时的回调
onUnSticky: undefined ///sticky元素取消固定时的回调
};
return function (elem, opts) {
var $elem = $(elem);
opts = $.extend({}, DEFAULTS, opts || {}, $elem.data() || {});
var $target = $(opts.target);
if (!$elem.length || !$target.length) return;
var stickyWidth,
setStickyWidth = function () {
stickyWidth = typeof opts.getStickyWidth === 'function' && opts.getStickyWidth($elem) || $elem[0].offsetWidth;
},
docClientHeight = document.documentElement.clientHeight,
unStickyDistance = opts.unStickyDistance || $elem[0].offsetHeight,
setSticky = function () {
!$elem.hasClass(className) && $elem.addClass(className).css('width', stickyWidth)
&& (typeof opts.onSticky == 'function' && opts.onSticky($elem, $target));
return true;
},
states = {
staticSticky: function () {
setSticky() && $elem.css(opts.type, opts.stickyOffset);
},
dynamicSticky: function (rect) {
setSticky() && $elem.css(opts.type, rules[opts.type].getDynamicOffset(rect));
},
unSticky: function () {
$elem.hasClass(className) && $elem.removeClass(className).css('width', '').css(opts.type, '')
&& (typeof opts.onUnSticky == 'function' && opts.onUnSticky($elem, $target));
}
},
rules = {
top: {
getState: function (rect) {
if (rect.top < 0 && (rect.bottom - unStickyDistance) > 0) return 'staticSticky';
else if ((rect.bottom - unStickyDistance) <= 0 && rect.bottom > 0) return 'dynamicSticky';
else return 'unSticky';
},
getDynamicOffset: function (rect) {
return -(unStickyDistance - rect.bottom);
}
},
bottom: {
getState: function (rect) {
if (rect.bottom > docClientHeight && (rect.top + unStickyDistance) < docClientHeight) return 'staticSticky';
else if ((rect.top + unStickyDistance) >= docClientHeight && rect.top < docClientHeight) return 'dynamicSticky';
else return 'unSticky';
},
getDynamicOffset: function (rect) {
return -(unStickyDistance + rect.top - docClientHeight);
}
}
},
className = 'sticky--in-' + opts.type,
$win = $(window);
setStickyWidth();
$win.scroll(throttle(sticky, opts.wait));
!opts.isFixedWidth && $win.resize(throttle(function () {
setStickyWidth();
$elem.hasClass(className) && $elem.css('width', stickyWidth);
sticky();
}, opts.wait));
$win.resize(throttle(function () {
docClientHeight = document.documentElement.clientHeight;
}, opts.wait));
function sticky() {
var rect = $target[0].getBoundingClientRect(),
curState = rules[opts.type].getState(rect);
states[curState](rect);
}
}
})(jQuery);

var timer = setInterval(function(){
if($('#blogCalendar').length && $('#profile_block').length && $('#sidebar_search').length) {
new Sticky('#sideBar', {
target: '#main',
onSticky: function($elem, $target){
$target.css('min-height',$elem.outerHeight());
$elem.css('left', '65px');
},
onUnSticky: function($elem, $target){
$target.css('min-height','');
$elem.css('left', '');
}
});
}
},100);