'use strict';

//下面别动
function myapi(){

    this.mousescroll = {

        inte : function(obj,value){
            this.obj = obj;
            this.addscroll(obj);

            var outh = obj.outerheight(),
                oscrollcontent = obj.children(':first'),
                contenth = oscrollcontent.outerheight(),
                oyscrollinnerh = outh/contenth*outh,
                oyscrollouter = obj.find('#yscrollouter'),
                oyscrollinner = obj.find('#yscrollinner');

            obj.css({'position': 'relative','overflow':'auto'});
            oscrollcontent.css('position', 'absolute');

            if(contenth > outh){
                this.mousehover(obj, oyscrollouter, oyscrollinner);
                this.mousewheel(obj, value, oscrollcontent, oyscrollinner, outh, contenth, oyscrollinnerh );
                this.mousemoved(obj, oscrollcontent, oyscrollouter, oyscrollinner, outh, contenth, oyscrollinnerh );
            };
        },

        addscroll : function(obj,value){
            obj.append('<div id="yscrollouter"><div id="yscrollinner"></div></div>');
            $('#yscrollinner').css('cursor','pointer');
        },

        mousehover : function(obj, outer, inner){

            obj.hover(function() {
                outer.fadein(400);
            }, function() {
                outer.fadeout(400);
            });

            inner.hover(function() {
                $('body').css({
                    '-moz-user-select': 'auto',
                    '-webkit-user-select': 'auto',
                    '-ms-user-select': 'auto',
                    '-khtml-user-select': 'auto',
                    'user-select': 'auto',});
            }, function() {
                $('body').css({
                    '-moz-user-select': 'auto',
                    '-webkit-user-select': 'auto',
                    '-ms-user-select': 'auto',
                    '-khtml-user-select': 'auto',
                    'user-select': 'auto',});
            });

        },

        mousewheel : function(obj, value, o, inner, h1, h2, h3){

            var oscrollcontentval = value/(h1 - h3)*(h2 - h1);

                inner.height(h3);  //滚动条高度

            obj.on('mousewheel',function(event,delta ){  //绑定滚轮事件

                event.preventdefault();  //阻止浏览器默认为行

                var delta = event.originalevent.wheeldelta;
                var oyscrollinnertop = inner.position().top;

                var oscrollcontenttop = o.position().top;

                if(delta > 0){
                    if(oyscrollinnertop - value < 0){
                        inner.css('top', 0);
                        o.css('top', 0);
                    }else{
                        inner.css('top', oyscrollinnertop - value);
                        o.css('top', oscrollcontenttop + oscrollcontentval);
                    }
                }else{
                    if(oyscrollinnertop + value > h1 - h3){
                        inner.css('top', h1 - h3);
                        o.css('top', h1 - h2);
                    }else{
                        inner.css('top', oyscrollinnertop + value);
                        o.css('top', oscrollcontenttop - oscrollcontentval);
                    }
                };
            });

        },

        mousemoved : function(obj, o, outer, inner, h1, h2, h3){
            inner.on('mousedown',function(event){   //绑定鼠标事件

                var clienty = event.clienty,
                    oyscrollinnertop = inner.position().top,
                    oscrollcontenttop = o.position().top,

                    movey = 0;

                    $(document).on('mousemove',function(event){
                        movey = event.clienty - clienty;
                        var oscrollcontentmove = movey/(h1 - h3)*(h2 - h1);

                        if(oyscrollinnertop + movey < 0){
                            inner.css('top', 0);
                            o.css('top', 0);
                        }else if(oyscrollinnertop + movey > h1 - h3){
                            inner.css('top', h1 - h3);
                            o.css('top', h1 - h2);
                        }else{
                            inner.css('top', oyscrollinnertop + movey);
                            o.css('top', oscrollcontenttop - oscrollcontentmove);
                        }
                    });

                    $(document).on('mouseup',function(event){
                        $(document).off('mousemove');
                    })

            })
        }

    }
}