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jquery.mCustomScrollbar.js
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/*
== malihu jquery custom scrollbar plugin ==
Version: 3.0.6
Plugin URI: http://manos.malihu.gr/jquery-custom-content-scroller
Author: malihu
Author URI: http://manos.malihu.gr
License: MIT License (MIT)
*/
/*
Copyright 2010 Manos Malihutsakis (email: [email protected])
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
/*
The code below is fairly long, fully commented and should be normally used in development.
For production, use either the minified jquery.mCustomScrollbar.min.js script or
the production-ready jquery.mCustomScrollbar.concat.min.js which contains the plugin
and dependencies (minified).
*/
;(function($,window,document){
(function(init){
var _rjs=typeof define==="function" && define.amd, /* RequireJS */
_dlp=("https:"==document.location.protocol) ? "https:" : "http:", /* location protocol */
_url="cdnjs.cloudflare.com/ajax/libs/jquery-mousewheel/3.1.12/jquery.mousewheel.min.js";
if(!_rjs){
/* load jquery-mousewheel plugin (via CDN) if it's not present or not loaded via RequireJS
(works when mCustomScrollbar fn is called on window load) */
$.event.special.mousewheel || $("head").append(decodeURI("%3Cscript src="+_dlp+"//"+_url+"%3E%3C/script%3E"));
}
init();
}(function(){
/*
----------------------------------------
PLUGIN NAMESPACE, PREFIX, DEFAULT SELECTOR(S)
----------------------------------------
*/
var pluginNS="mCustomScrollbar",
pluginPfx="mCS",
defaultSelector=".mCustomScrollbar",
/*
----------------------------------------
DEFAULT OPTIONS
----------------------------------------
*/
defaults={
/*
set element/content width/height programmatically
values: boolean, pixels, percentage
option default
-------------------------------------
setWidth false
setHeight false
*/
/*
set the initial css top property of content
values: string (e.g. "-100px", "10%" etc.)
*/
setTop:0,
/*
set the initial css left property of content
values: string (e.g. "-100px", "10%" etc.)
*/
setLeft:0,
/*
scrollbar axis (vertical and/or horizontal scrollbars)
values (string): "y", "x", "yx"
*/
axis:"y",
/*
position of scrollbar relative to content
values (string): "inside", "outside" ("outside" requires elements with position:relative)
*/
scrollbarPosition:"inside",
/*
scrolling inertia
values: integer (milliseconds)
*/
scrollInertia:950,
/*
auto-adjust scrollbar dragger length
values: boolean
*/
autoDraggerLength:true,
/*
auto-hide scrollbar when idle
values: boolean
option default
-------------------------------------
autoHideScrollbar false
*/
/*
auto-expands scrollbar on mouse-over and dragging
values: boolean
option default
-------------------------------------
autoExpandScrollbar false
*/
/*
always show scrollbar, even when there's nothing to scroll
values: integer (0=disable, 1=always show dragger rail, 2=always show dragger rail, dragger and buttons), boolean
*/
alwaysShowScrollbar:0,
/*
scrolling always snaps to a multiple of this number in pixels
values: integer
option default
-------------------------------------
snapAmount null
*/
/*
when snapping, snap with this number in pixels as an offset
values: integer
*/
snapOffset:0,
/*
mouse-wheel scrolling
*/
mouseWheel:{
/*
enable mouse-wheel scrolling
values: boolean
*/
enable:true,
/*
scrolling amount in pixels
values: "auto", integer
*/
scrollAmount:"auto",
/*
mouse-wheel scrolling axis
the default scrolling direction when both vertical and horizontal scrollbars are present
values (string): "y", "x"
*/
axis:"y",
/*
prevent the default behaviour which automatically scrolls the parent element(s) when end of scrolling is reached
values: boolean
option default
-------------------------------------
preventDefault null
*/
/*
the reported mouse-wheel delta value. The number of lines (translated to pixels) one wheel notch scrolls.
values: "auto", integer
"auto" uses the default OS/browser value
*/
deltaFactor:"auto",
/*
normalize mouse-wheel delta to -1 or 1 (disables mouse-wheel acceleration)
values: boolean
option default
-------------------------------------
normalizeDelta null
*/
/*
invert mouse-wheel scrolling direction
values: boolean
option default
-------------------------------------
invert null
*/
/*
the tags that disable mouse-wheel when cursor is over them
*/
disableOver:["select","option","keygen","datalist","textarea"]
},
/*
scrollbar buttons
*/
scrollButtons:{
/*
enable scrollbar buttons
values: boolean
option default
-------------------------------------
enable null
*/
/*
scrollbar buttons scrolling type
values (string): "stepless", "stepped"
*/
scrollType:"stepless",
/*
scrolling amount in pixels
values: "auto", integer
*/
scrollAmount:"auto"
/*
tabindex of the scrollbar buttons
values: false, integer
option default
-------------------------------------
tabindex null
*/
},
/*
keyboard scrolling
*/
keyboard:{
/*
enable scrolling via keyboard
values: boolean
*/
enable:true,
/*
keyboard scrolling type
values (string): "stepless", "stepped"
*/
scrollType:"stepless",
/*
scrolling amount in pixels
values: "auto", integer
*/
scrollAmount:"auto"
},
/*
enable content touch-swipe scrolling
values: boolean, integer, string (number)
integer values define the axis-specific minimum amount required for scrolling momentum
*/
contentTouchScroll:25,
/*
advanced option parameters
*/
advanced:{
/*
auto-expand content horizontally (for "x" or "yx" axis)
values: boolean
option default
-------------------------------------
autoExpandHorizontalScroll null
*/
/*
auto-scroll to elements with focus
*/
autoScrollOnFocus:"input,textarea,select,button,datalist,keygen,a[tabindex],area,object,[contenteditable='true']",
/*
auto-update scrollbars on content, element or viewport resize
should be true for fluid layouts/elements, adding/removing content dynamically, hiding/showing elements, content with images etc.
values: boolean
*/
updateOnContentResize:true,
/*
auto-update scrollbars each time each image inside the element is fully loaded
values: boolean
*/
updateOnImageLoad:true
/*
auto-update scrollbars based on the amount and size changes of specific selectors
useful when you need to update the scrollbar(s) automatically, each time a type of element is added, removed or changes its size
values: boolean, string (e.g. "ul li" will auto-update scrollbars each time list-items inside the element are changed)
a value of true (boolean) will auto-update scrollbars each time any element is changed
option default
-------------------------------------
updateOnSelectorChange null
*/
/*
extra selectors that'll release scrollbar dragging upon mouseup, pointerup, touchend etc. (e.g. "selector-1, selector-2")
option default
-------------------------------------
releaseDraggableSelectors null
*/
},
/*
scrollbar theme
values: string (see CSS/plugin URI for a list of ready-to-use themes)
*/
theme:"light",
/*
user defined callback functions
*/
callbacks:{
/*
Available callbacks:
callback default
-------------------------------------
onInit null
onScrollStart null
onScroll null
onTotalScroll null
onTotalScrollBack null
whileScrolling null
onTotalScrollOffset 0
onTotalScrollBackOffset 0
alwaysTriggerOffsets true
onOverflowY null
onOverflowX null
onOverflowYNone null
onOverflowXNone null
onImageLoad null
onSelectorChange null
onUpdate null
*/
onTotalScrollOffset:0,
onTotalScrollBackOffset:0,
alwaysTriggerOffsets:true
}
/*
add scrollbar(s) on all elements matching the current selector, now and in the future
values: boolean, string
string values: "on" (enable), "once" (disable after first invocation), "off" (disable)
liveSelector values: string (selector)
option default
-------------------------------------
live false
liveSelector null
*/
},
/*
----------------------------------------
VARS, CONSTANTS
----------------------------------------
*/
totalInstances=0, /* plugin instances amount */
liveTimers={}, /* live option timers */
oldIE=(window.attachEvent && !window.addEventListener) ? 1 : 0, /* detect IE < 9 */
touchActive=false, /* global touch state (for touch and pointer events) */
/* general plugin classes */
classes=[
"mCSB_dragger_onDrag","mCSB_scrollTools_onDrag","mCS_img_loaded","mCS_disabled","mCS_destroyed","mCS_no_scrollbar",
"mCS-autoHide","mCS-dir-rtl","mCS_no_scrollbar_y","mCS_no_scrollbar_x","mCS_y_hidden","mCS_x_hidden","mCSB_draggerContainer",
"mCSB_buttonUp","mCSB_buttonDown","mCSB_buttonLeft","mCSB_buttonRight"
],
/*
----------------------------------------
METHODS
----------------------------------------
*/
methods={
/*
plugin initialization method
creates the scrollbar(s), plugin data object and options
----------------------------------------
*/
init:function(options){
var options=$.extend(true,{},defaults,options),
selector=_selector.call(this); /* validate selector */
/*
if live option is enabled, monitor for elements matching the current selector and
apply scrollbar(s) when found (now and in the future)
*/
if(options.live){
var liveSelector=options.liveSelector || this.selector || defaultSelector, /* live selector(s) */
$liveSelector=$(liveSelector); /* live selector(s) as jquery object */
if(options.live==="off"){
/*
disable live if requested
usage: $(selector).mCustomScrollbar({live:"off"});
*/
removeLiveTimers(liveSelector);
return;
}
liveTimers[liveSelector]=setTimeout(function(){
/* call mCustomScrollbar fn on live selector(s) every half-second */
$liveSelector.mCustomScrollbar(options);
if(options.live==="once" && $liveSelector.length){
/* disable live after first invocation */
removeLiveTimers(liveSelector);
}
},500);
}else{
removeLiveTimers(liveSelector);
}
/* options backward compatibility (for versions < 3.0.0) and normalization */
options.setWidth=(options.set_width) ? options.set_width : options.setWidth;
options.setHeight=(options.set_height) ? options.set_height : options.setHeight;
options.axis=(options.horizontalScroll) ? "x" : _findAxis(options.axis);
options.scrollInertia=options.scrollInertia>0 && options.scrollInertia<17 ? 17 : options.scrollInertia;
if(typeof options.mouseWheel!=="object" && options.mouseWheel==true){ /* old school mouseWheel option (non-object) */
options.mouseWheel={enable:true,scrollAmount:"auto",axis:"y",preventDefault:false,deltaFactor:"auto",normalizeDelta:false,invert:false}
}
options.mouseWheel.scrollAmount=!options.mouseWheelPixels ? options.mouseWheel.scrollAmount : options.mouseWheelPixels;
options.mouseWheel.normalizeDelta=!options.advanced.normalizeMouseWheelDelta ? options.mouseWheel.normalizeDelta : options.advanced.normalizeMouseWheelDelta;
options.scrollButtons.scrollType=_findScrollButtonsType(options.scrollButtons.scrollType);
_theme(options); /* theme-specific options */
/* plugin constructor */
return $(selector).each(function(){
var $this=$(this);
if(!$this.data(pluginPfx)){ /* prevent multiple instantiations */
/* store options and create objects in jquery data */
$this.data(pluginPfx,{
idx:++totalInstances, /* instance index */
opt:options, /* options */
scrollRatio:{y:null,x:null}, /* scrollbar to content ratio */
overflowed:null, /* overflowed axis */
contentReset:{y:null,x:null}, /* object to check when content resets */
bindEvents:false, /* object to check if events are bound */
tweenRunning:false, /* object to check if tween is running */
sequential:{}, /* sequential scrolling object */
langDir:$this.css("direction"), /* detect/store direction (ltr or rtl) */
cbOffsets:null, /* object to check whether callback offsets always trigger */
/*
object to check how scrolling events where last triggered
"internal" (default - triggered by this script), "external" (triggered by other scripts, e.g. via scrollTo method)
usage: object.data("mCS").trigger
*/
trigger:null
});
var d=$this.data(pluginPfx),o=d.opt,
/* HTML data attributes */
htmlDataAxis=$this.data("mcs-axis"),htmlDataSbPos=$this.data("mcs-scrollbar-position"),htmlDataTheme=$this.data("mcs-theme");
if(htmlDataAxis){o.axis=htmlDataAxis;} /* usage example: data-mcs-axis="y" */
if(htmlDataSbPos){o.scrollbarPosition=htmlDataSbPos;} /* usage example: data-mcs-scrollbar-position="outside" */
if(htmlDataTheme){ /* usage example: data-mcs-theme="minimal" */
o.theme=htmlDataTheme;
_theme(o); /* theme-specific options */
}
_pluginMarkup.call(this); /* add plugin markup */
$("#mCSB_"+d.idx+"_container img:not(."+classes[2]+")").addClass(classes[2]); /* flag loaded images */
methods.update.call(null,$this); /* call the update method */
}
});
},
/* ---------------------------------------- */
/*
plugin update method
updates content and scrollbar(s) values, events and status
----------------------------------------
usage: $(selector).mCustomScrollbar("update");
*/
update:function(el,cb){
var selector=el || _selector.call(this); /* validate selector */
return $(selector).each(function(){
var $this=$(this);
if($this.data(pluginPfx)){ /* check if plugin has initialized */
var d=$this.data(pluginPfx),o=d.opt,
mCSB_container=$("#mCSB_"+d.idx+"_container"),
mCSB_dragger=[$("#mCSB_"+d.idx+"_dragger_vertical"),$("#mCSB_"+d.idx+"_dragger_horizontal")];
if(!mCSB_container.length){return;}
if(d.tweenRunning){_stop($this);} /* stop any running tweens while updating */
/* if element was disabled or destroyed, remove class(es) */
if($this.hasClass(classes[3])){$this.removeClass(classes[3]);}
if($this.hasClass(classes[4])){$this.removeClass(classes[4]);}
_maxHeight.call(this); /* detect/set css max-height value */
_expandContentHorizontally.call(this); /* expand content horizontally */
if(o.axis!=="y" && !o.advanced.autoExpandHorizontalScroll){
mCSB_container.css("width",_contentWidth(mCSB_container.children()));
}
d.overflowed=_overflowed.call(this); /* determine if scrolling is required */
_scrollbarVisibility.call(this); /* show/hide scrollbar(s) */
/* auto-adjust scrollbar dragger length analogous to content */
if(o.autoDraggerLength){_setDraggerLength.call(this);}
_scrollRatio.call(this); /* calculate and store scrollbar to content ratio */
_bindEvents.call(this); /* bind scrollbar events */
/* reset scrolling position and/or events */
var to=[Math.abs(mCSB_container[0].offsetTop),Math.abs(mCSB_container[0].offsetLeft)];
if(o.axis!=="x"){ /* y/yx axis */
if(!d.overflowed[0]){ /* y scrolling is not required */
_resetContentPosition.call(this); /* reset content position */
if(o.axis==="y"){
_unbindEvents.call(this);
}else if(o.axis==="yx" && d.overflowed[1]){
_scrollTo($this,to[1].toString(),{dir:"x",dur:0,overwrite:"none"});
}
}else if(mCSB_dragger[0].height()>mCSB_dragger[0].parent().height()){
_resetContentPosition.call(this); /* reset content position */
}else{ /* y scrolling is required */
_scrollTo($this,to[0].toString(),{dir:"y",dur:0,overwrite:"none"});
d.contentReset.y=null;
}
}
if(o.axis!=="y"){ /* x/yx axis */
if(!d.overflowed[1]){ /* x scrolling is not required */
_resetContentPosition.call(this); /* reset content position */
if(o.axis==="x"){
_unbindEvents.call(this);
}else if(o.axis==="yx" && d.overflowed[0]){
_scrollTo($this,to[0].toString(),{dir:"y",dur:0,overwrite:"none"});
}
}else if(mCSB_dragger[1].width()>mCSB_dragger[1].parent().width()){
_resetContentPosition.call(this); /* reset content position */
}else{ /* x scrolling is required */
_scrollTo($this,to[1].toString(),{dir:"x",dur:0,overwrite:"none"});
d.contentReset.x=null;
}
}
/* callbacks: onImageLoad, onSelectorChange, onUpdate */
if(cb && d){
if(cb===2 && o.callbacks.onImageLoad && typeof o.callbacks.onImageLoad==="function"){
o.callbacks.onImageLoad.call(this);
}else if(cb===3 && o.callbacks.onSelectorChange && typeof o.callbacks.onSelectorChange==="function"){
o.callbacks.onSelectorChange.call(this);
}else if(o.callbacks.onUpdate && typeof o.callbacks.onUpdate==="function"){
o.callbacks.onUpdate.call(this);
}
}
_autoUpdate.call(this); /* initialize automatic updating (for dynamic content, fluid layouts etc.) */
}
});
},
/* ---------------------------------------- */
/*
plugin scrollTo method
triggers a scrolling event to a specific value
----------------------------------------
usage: $(selector).mCustomScrollbar("scrollTo",value,options);
*/
scrollTo:function(val,options){
/* prevent silly things like $(selector).mCustomScrollbar("scrollTo",undefined); */
if(typeof val=="undefined" || val==null){return;}
var selector=_selector.call(this); /* validate selector */
return $(selector).each(function(){
var $this=$(this);
if($this.data(pluginPfx)){ /* check if plugin has initialized */
var d=$this.data(pluginPfx),o=d.opt,
/* method default options */
methodDefaults={
trigger:"external", /* method is by default triggered externally (e.g. from other scripts) */
scrollInertia:o.scrollInertia, /* scrolling inertia (animation duration) */
scrollEasing:"mcsEaseInOut", /* animation easing */
moveDragger:false, /* move dragger instead of content */
timeout:60, /* scroll-to delay */
callbacks:true, /* enable/disable callbacks */
onStart:true,
onUpdate:true,
onComplete:true
},
methodOptions=$.extend(true,{},methodDefaults,options),
to=_arr.call(this,val),dur=methodOptions.scrollInertia>0 && methodOptions.scrollInertia<17 ? 17 : methodOptions.scrollInertia;
/* translate yx values to actual scroll-to positions */
to[0]=_to.call(this,to[0],"y");
to[1]=_to.call(this,to[1],"x");
/*
check if scroll-to value moves the dragger instead of content.
Only pixel values apply on dragger (e.g. 100, "100px", "-=100" etc.)
*/
if(methodOptions.moveDragger){
to[0]*=d.scrollRatio.y;
to[1]*=d.scrollRatio.x;
}
methodOptions.dur=dur;
setTimeout(function(){
/* do the scrolling */
if(to[0]!==null && typeof to[0]!=="undefined" && o.axis!=="x" && d.overflowed[0]){ /* scroll y */
methodOptions.dir="y";
methodOptions.overwrite="all";
_scrollTo($this,to[0].toString(),methodOptions);
}
if(to[1]!==null && typeof to[1]!=="undefined" && o.axis!=="y" && d.overflowed[1]){ /* scroll x */
methodOptions.dir="x";
methodOptions.overwrite="none";
_scrollTo($this,to[1].toString(),methodOptions);
}
},methodOptions.timeout);
}
});
},
/* ---------------------------------------- */
/*
plugin stop method
stops scrolling animation
----------------------------------------
usage: $(selector).mCustomScrollbar("stop");
*/
stop:function(){
var selector=_selector.call(this); /* validate selector */
return $(selector).each(function(){
var $this=$(this);
if($this.data(pluginPfx)){ /* check if plugin has initialized */
_stop($this);
}
});
},
/* ---------------------------------------- */
/*
plugin disable method
temporarily disables the scrollbar(s)
----------------------------------------
usage: $(selector).mCustomScrollbar("disable",reset);
reset (boolean): resets content position to 0
*/
disable:function(r){
var selector=_selector.call(this); /* validate selector */
return $(selector).each(function(){
var $this=$(this);
if($this.data(pluginPfx)){ /* check if plugin has initialized */
var d=$this.data(pluginPfx);
_autoUpdate.call(this,"remove"); /* remove automatic updating */
_unbindEvents.call(this); /* unbind events */
if(r){_resetContentPosition.call(this);} /* reset content position */
_scrollbarVisibility.call(this,true); /* show/hide scrollbar(s) */
$this.addClass(classes[3]); /* add disable class */
}
});
},
/* ---------------------------------------- */
/*
plugin destroy method
completely removes the scrollbar(s) and returns the element to its original state
----------------------------------------
usage: $(selector).mCustomScrollbar("destroy");
*/
destroy:function(){
var selector=_selector.call(this); /* validate selector */
return $(selector).each(function(){
var $this=$(this);
if($this.data(pluginPfx)){ /* check if plugin has initialized */
var d=$this.data(pluginPfx),o=d.opt,
mCustomScrollBox=$("#mCSB_"+d.idx),
mCSB_container=$("#mCSB_"+d.idx+"_container"),
scrollbar=$(".mCSB_"+d.idx+"_scrollbar");
if(o.live){removeLiveTimers(o.liveSelector || $(selector).selector);} /* remove live timers */
_autoUpdate.call(this,"remove"); /* remove automatic updating */
_unbindEvents.call(this); /* unbind events */
_resetContentPosition.call(this); /* reset content position */
$this.removeData(pluginPfx); /* remove plugin data object */
_delete(this,"mcs"); /* delete callbacks object */
/* remove plugin markup */
scrollbar.remove(); /* remove scrollbar(s) first (those can be either inside or outside plugin's inner wrapper) */
mCSB_container.find("img."+classes[2]).removeClass(classes[2]); /* remove loaded images flag */
mCustomScrollBox.replaceWith(mCSB_container.contents()); /* replace plugin's inner wrapper with the original content */
/* remove plugin classes from the element and add destroy class */
$this.removeClass(pluginNS+" _"+pluginPfx+"_"+d.idx+" "+classes[6]+" "+classes[7]+" "+classes[5]+" "+classes[3]).addClass(classes[4]);
}
});
}
/* ---------------------------------------- */
},
/*
----------------------------------------
FUNCTIONS
----------------------------------------
*/
/* validates selector (if selector is invalid or undefined uses the default one) */
_selector=function(){
return (typeof $(this)!=="object" || $(this).length<1) ? defaultSelector : this;
},
/* -------------------- */
/* changes options according to theme */
_theme=function(obj){
var fixedSizeScrollbarThemes=["rounded","rounded-dark","rounded-dots","rounded-dots-dark"],
nonExpandedScrollbarThemes=["rounded-dots","rounded-dots-dark","3d","3d-dark","3d-thick","3d-thick-dark","inset","inset-dark","inset-2","inset-2-dark","inset-3","inset-3-dark"],
disabledScrollButtonsThemes=["minimal","minimal-dark"],
enabledAutoHideScrollbarThemes=["minimal","minimal-dark"],
scrollbarPositionOutsideThemes=["minimal","minimal-dark"];
obj.autoDraggerLength=$.inArray(obj.theme,fixedSizeScrollbarThemes) > -1 ? false : obj.autoDraggerLength;
obj.autoExpandScrollbar=$.inArray(obj.theme,nonExpandedScrollbarThemes) > -1 ? false : obj.autoExpandScrollbar;
obj.scrollButtons.enable=$.inArray(obj.theme,disabledScrollButtonsThemes) > -1 ? false : obj.scrollButtons.enable;
obj.autoHideScrollbar=$.inArray(obj.theme,enabledAutoHideScrollbarThemes) > -1 ? true : obj.autoHideScrollbar;
obj.scrollbarPosition=$.inArray(obj.theme,scrollbarPositionOutsideThemes) > -1 ? "outside" : obj.scrollbarPosition;
},
/* -------------------- */
/* live option timers removal */
removeLiveTimers=function(selector){
if(liveTimers[selector]){
clearTimeout(liveTimers[selector]);
_delete(liveTimers,selector);
}
},
/* -------------------- */
/* normalizes axis option to valid values: "y", "x", "yx" */
_findAxis=function(val){
return (val==="yx" || val==="xy" || val==="auto") ? "yx" : (val==="x" || val==="horizontal") ? "x" : "y";
},
/* -------------------- */
/* normalizes scrollButtons.scrollType option to valid values: "stepless", "stepped" */
_findScrollButtonsType=function(val){
return (val==="stepped" || val==="pixels" || val==="step" || val==="click") ? "stepped" : "stepless";
},
/* -------------------- */
/* generates plugin markup */
_pluginMarkup=function(){
var $this=$(this),d=$this.data(pluginPfx),o=d.opt,
expandClass=o.autoExpandScrollbar ? " "+classes[1]+"_expand" : "",
scrollbar=["<div id='mCSB_"+d.idx+"_scrollbar_vertical' class='mCSB_scrollTools mCSB_"+d.idx+"_scrollbar mCS-"+o.theme+" mCSB_scrollTools_vertical"+expandClass+"'><div class='"+classes[12]+"'><div id='mCSB_"+d.idx+"_dragger_vertical' class='mCSB_dragger' style='position:absolute;' oncontextmenu='return false;'><div class='mCSB_dragger_bar' /></div><div class='mCSB_draggerRail' /></div></div>","<div id='mCSB_"+d.idx+"_scrollbar_horizontal' class='mCSB_scrollTools mCSB_"+d.idx+"_scrollbar mCS-"+o.theme+" mCSB_scrollTools_horizontal"+expandClass+"'><div class='"+classes[12]+"'><div id='mCSB_"+d.idx+"_dragger_horizontal' class='mCSB_dragger' style='position:absolute;' oncontextmenu='return false;'><div class='mCSB_dragger_bar' /></div><div class='mCSB_draggerRail' /></div></div>"],
wrapperClass=o.axis==="yx" ? "mCSB_vertical_horizontal" : o.axis==="x" ? "mCSB_horizontal" : "mCSB_vertical",
scrollbars=o.axis==="yx" ? scrollbar[0]+scrollbar[1] : o.axis==="x" ? scrollbar[1] : scrollbar[0],
contentWrapper=o.axis==="yx" ? "<div id='mCSB_"+d.idx+"_container_wrapper' class='mCSB_container_wrapper' />" : "",
autoHideClass=o.autoHideScrollbar ? " "+classes[6] : "",
scrollbarDirClass=(o.axis!=="x" && d.langDir==="rtl") ? " "+classes[7] : "";
if(o.setWidth){$this.css("width",o.setWidth);} /* set element width */
if(o.setHeight){$this.css("height",o.setHeight);} /* set element height */
o.setLeft=(o.axis!=="y" && d.langDir==="rtl") ? "989999px" : o.setLeft; /* adjust left position for rtl direction */
$this.addClass(pluginNS+" _"+pluginPfx+"_"+d.idx+autoHideClass+scrollbarDirClass).wrapInner("<div id='mCSB_"+d.idx+"' class='mCustomScrollBox mCS-"+o.theme+" "+wrapperClass+"'><div id='mCSB_"+d.idx+"_container' class='mCSB_container' style='position:relative; top:"+o.setTop+"; left:"+o.setLeft+";' dir="+d.langDir+" /></div>");
var mCustomScrollBox=$("#mCSB_"+d.idx),
mCSB_container=$("#mCSB_"+d.idx+"_container");
if(o.axis!=="y" && !o.advanced.autoExpandHorizontalScroll){
mCSB_container.css("width",_contentWidth(mCSB_container.children()));
}
if(o.scrollbarPosition==="outside"){
if($this.css("position")==="static"){ /* requires elements with non-static position */
$this.css("position","relative");
}
$this.css("overflow","visible");
mCustomScrollBox.addClass("mCSB_outside").after(scrollbars);
}else{
mCustomScrollBox.addClass("mCSB_inside").append(scrollbars);
mCSB_container.wrap(contentWrapper);
}
_scrollButtons.call(this); /* add scrollbar buttons */
/* minimum dragger length */
var mCSB_dragger=[$("#mCSB_"+d.idx+"_dragger_vertical"),$("#mCSB_"+d.idx+"_dragger_horizontal")];
mCSB_dragger[0].css("min-height",mCSB_dragger[0].height());
mCSB_dragger[1].css("min-width",mCSB_dragger[1].width());
},
/* -------------------- */
/* calculates content width */
_contentWidth=function(el){
return Math.max.apply(Math,el.map(function(){return $(this).outerWidth(true);}).get());
},
/* -------------------- */
/* expands content horizontally */
_expandContentHorizontally=function(){
var $this=$(this),d=$this.data(pluginPfx),o=d.opt,
mCSB_container=$("#mCSB_"+d.idx+"_container");
if(o.advanced.autoExpandHorizontalScroll && o.axis!=="y"){
/*
wrap content with an infinite width div and set its position to absolute and width to auto.
Setting width to auto before calculating the actual width is important!
We must let the browser set the width as browser zoom values are impossible to calculate.
*/
mCSB_container.css({"position":"absolute","width":"auto"})
.wrap("<div class='mCSB_h_wrapper' style='position:relative; left:0; width:999999px;' />")
.css({ /* set actual width, original position and un-wrap */
/*
get the exact width (with decimals) and then round-up.
Using jquery outerWidth() will round the width value which will mess up with inner elements that have non-integer width
*/
"width":(Math.ceil(mCSB_container[0].getBoundingClientRect().right+0.4)-Math.floor(mCSB_container[0].getBoundingClientRect().left)),
"position":"relative"
}).unwrap();
}
},
/* -------------------- */
/* adds scrollbar buttons */
_scrollButtons=function(){
var $this=$(this),d=$this.data(pluginPfx),o=d.opt,
mCSB_scrollTools=$(".mCSB_"+d.idx+"_scrollbar:first"),
tabindex=!_isNumeric(o.scrollButtons.tabindex) ? "" : "tabindex='"+o.scrollButtons.tabindex+"'",
btnHTML=[
"<a href='#' class='"+classes[13]+"' oncontextmenu='return false;' "+tabindex+" />",
"<a href='#' class='"+classes[14]+"' oncontextmenu='return false;' "+tabindex+" />",
"<a href='#' class='"+classes[15]+"' oncontextmenu='return false;' "+tabindex+" />",
"<a href='#' class='"+classes[16]+"' oncontextmenu='return false;' "+tabindex+" />"
],
btn=[(o.axis==="x" ? btnHTML[2] : btnHTML[0]),(o.axis==="x" ? btnHTML[3] : btnHTML[1]),btnHTML[2],btnHTML[3]];
if(o.scrollButtons.enable){
mCSB_scrollTools.prepend(btn[0]).append(btn[1]).next(".mCSB_scrollTools").prepend(btn[2]).append(btn[3]);
}
},
/* -------------------- */
/* detects/sets css max-height value */
_maxHeight=function(){
var $this=$(this),d=$this.data(pluginPfx),
mCustomScrollBox=$("#mCSB_"+d.idx),
mh=$this.css("max-height") || "none",pct=mh.indexOf("%")!==-1,
bs=$this.css("box-sizing");
if(mh!=="none"){
var val=pct ? $this.parent().height()*parseInt(mh)/100 : parseInt(mh);
/* if element's css box-sizing is "border-box", subtract any paddings and/or borders from max-height value */
if(bs==="border-box"){val-=(($this.innerHeight()-$this.height())+($this.outerHeight()-$this.innerHeight()));}
mCustomScrollBox.css("max-height",Math.round(val));
}
},
/* -------------------- */
/* auto-adjusts scrollbar dragger length */
_setDraggerLength=function(){
var $this=$(this),d=$this.data(pluginPfx),
mCustomScrollBox=$("#mCSB_"+d.idx),
mCSB_container=$("#mCSB_"+d.idx+"_container"),
mCSB_dragger=[$("#mCSB_"+d.idx+"_dragger_vertical"),$("#mCSB_"+d.idx+"_dragger_horizontal")],
ratio=[mCustomScrollBox.height()/mCSB_container.outerHeight(false),mCustomScrollBox.width()/mCSB_container.outerWidth(false)],
l=[
parseInt(mCSB_dragger[0].css("min-height")),Math.round(ratio[0]*mCSB_dragger[0].parent().height()),
parseInt(mCSB_dragger[1].css("min-width")),Math.round(ratio[1]*mCSB_dragger[1].parent().width())
],
h=oldIE && (l[1]<l[0]) ? l[0] : l[1],w=oldIE && (l[3]<l[2]) ? l[2] : l[3];
mCSB_dragger[0].css({
"height":h,"max-height":(mCSB_dragger[0].parent().height()-10)
}).find(".mCSB_dragger_bar").css({"line-height":l[0]+"px"});
mCSB_dragger[1].css({
"width":w,"max-width":(mCSB_dragger[1].parent().width()-10)
});
},
/* -------------------- */
/* calculates scrollbar to content ratio */
_scrollRatio=function(){
var $this=$(this),d=$this.data(pluginPfx),
mCustomScrollBox=$("#mCSB_"+d.idx),
mCSB_container=$("#mCSB_"+d.idx+"_container"),
mCSB_dragger=[$("#mCSB_"+d.idx+"_dragger_vertical"),$("#mCSB_"+d.idx+"_dragger_horizontal")],
scrollAmount=[mCSB_container.outerHeight(false)-mCustomScrollBox.height(),mCSB_container.outerWidth(false)-mCustomScrollBox.width()],
ratio=[
scrollAmount[0]/(mCSB_dragger[0].parent().height()-mCSB_dragger[0].height()),
scrollAmount[1]/(mCSB_dragger[1].parent().width()-mCSB_dragger[1].width())
];
d.scrollRatio={y:ratio[0],x:ratio[1]};
},
/* -------------------- */
/* toggles scrolling classes */
_onDragClasses=function(el,action,xpnd){
var expandClass=xpnd ? classes[0]+"_expanded" : "",
scrollbar=el.closest(".mCSB_scrollTools");
if(action==="active"){
el.toggleClass(classes[0]+" "+expandClass); scrollbar.toggleClass(classes[1]);
el[0]._draggable=el[0]._draggable ? 0 : 1;
}else{
if(!el[0]._draggable){
if(action==="hide"){
el.removeClass(classes[0]); scrollbar.removeClass(classes[1]);
}else{
el.addClass(classes[0]); scrollbar.addClass(classes[1]);
}
}
}
},
/* -------------------- */
/* checks if content overflows its container to determine if scrolling is required */
_overflowed=function(){
var $this=$(this),d=$this.data(pluginPfx),
mCustomScrollBox=$("#mCSB_"+d.idx),
mCSB_container=$("#mCSB_"+d.idx+"_container"),
contentHeight=d.overflowed==null ? mCSB_container.height() : mCSB_container.outerHeight(false),
contentWidth=d.overflowed==null ? mCSB_container.width() : mCSB_container.outerWidth(false);
return [contentHeight>mCustomScrollBox.height(),contentWidth>mCustomScrollBox.width()];
},
/* -------------------- */
/* resets content position to 0 */
_resetContentPosition=function(){
var $this=$(this),d=$this.data(pluginPfx),o=d.opt,