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drag-on.js
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drag-on.js
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/**
* jQuery.Drag-On v2.8.6
* @author Dark Heart aka PretorDH
* @site dragon.deparadox.com
* MIT license
*/
$(function () {
$.fn.extend({
dragOn: function (opt) {
return jQuery.DragOn(this, opt);
}
});
$.extend({
DragOn: function (S, opt) { /* Scroll mechanics */
var def = {
exclusion : {'input': '', 'textarea': '', 'select': '', 'object':'' , 'iframe':'', 'details':'', 'id':'#gmap,#map-canvas,.button,[data-overflow=no-dragon],a > :not(img)'},
cursor : 'all-scroll',
holdEvents : 'mousedown.dragon touchstart.dragon',
draggEvents : 'mousemove.dragon touchmove.dragon',
releaseEvents : 'mouseup.dragon touchend.dragon',
wheelEvents : 'mousewheel.dragon wheel.dragon',
leaveEvents : 'mouseleave.dragon touchleave.dragon touchcancel.dragon',
touchEvents : 'touchstart.dragon touchmove.dragon touchcancel.dragon touchend.dragon',
easing : 'true'
},_this;
function onPrevent(E) {
var e = E || event, et = (e && e.target && (e.target.tagName || e.target.localName || e.target.nodeName).toLowerCase());
if ( def.touchEvents.indexOf( E.type )>=0 ) return;
return e && et && (et in _this.opt.exclusion || (e.target.href || $(e.target).parents().attr('href') && (e.stopPropagation && e.stopPropagation(), true)))
|| (e && e.preventDefault && e.preventDefault(), e.stopPropagation && e.stopPropagation(), false);
};
S = $(S);
_this = {
opt: (function (opt) {for (var b in opt) def[b]=opt[b]; return def;})(opt),
set option(o) {
for (var b in o)
_this.opt[b]=o[b];
if (o && !_this.on) _this.toggle().toggle();
return _this.opt;
},
get option() {
return _this.opt
},
moment: {},
bypass : false,
mx: 1,
my: 1,
on:true,
round: function(v) {return (v+(v>0?.5:-.5))<<1>>1},
abs: function(v) {return v>0?v:-v},
toggle: function(e) {
var o = _this.opt;
if (_this.on) {
S.css({ cursor: o.cursor }).on(o.holdEvents,'a',onPrevent).find('a').css({ cursor: 'pointer'});
S.on(o.wheelEvents,_this.onWhell).on(o.holdEvents,_this.onHold);
$('body').on({'keydown.dragon':_this.onKeyDown,'keyup.dragon':_this.onKeyDown});
(("Info" in window) && Info || console).log('DragOn fly...');
} else {
S.css({ cursor: '' }).off(o.holdEvents,'**',onPrevent).find('a').css({ cursor: '' });
S.off(o.wheelEvents,_this.onWhell).off(o.holdEvents,_this.onHold);
$('body').off({'keydown.dragon':_this.onKeyDown,'keyup.dragon':_this.onKeyDown});
(("Info" in window) && Info || console).log('DragOn landed...');
}
_this.on=!_this.on;
if (e!=null) S.trigger('BarOn.toggle');
return _this;
},
getCurPos: function () {
var b, to = S.to;
return S.curPos = {
't': to[0].scrollTop,
'ph': b = to.innerHeight(),
'maxY': to[0].scrollHeight - b,
'l': to[0].scrollLeft,
'pw': b = to.innerWidth(),
'maxX': to[0].scrollWidth - b
}
},
setCurPos: function (dx, dy) {
var t, l, cp=S.to, ddy, ddx, w=_this.mx<0 || _this.my<0;
dy = (dy>32 || dy<-32)?dy/this.abs(dy)<<5:dy;
dx = (dx>32 || dx<-32)?dx/this.abs(dx)<<5:dx;
while (S.to=_this.scrollParent(S.to, w)) {
cp = _this.getCurPos();
(cp.maxY > 0) && ((dy>0?dy:-dy) > (dx>0?dx:-dx))
&& ((cp.maxX > 0) || (dx = 0), ddy = (cp.t - (ddy = _this.round((cp.maxY / cp.ph + 1) * dy)) < 0) ? cp.t : (cp.t - ddy > cp.maxY ? cp.t - cp.maxY : ddy))
&& ( S.to[0].scrollTop = cp.t - ddy,true ) && ( (t = S.to[0].scrollTop != cp.t) && (dy = 0, S.to.trigger('scroll')) );
(cp.maxX > 0) && ((dx>0?dx:-dx) > (dy>0?dy:-dy))
&& ( dy = 0, ddx = (cp.l - (ddx = _this.round((cp.maxX / cp.pw + 1) * dx)) < 0) ? cp.l : (cp.l - ddx > cp.maxX ? cp.l - cp.maxX : ddx) )
&& ( S.to[0].scrollLeft = cp.l - ddx,true) && ( (l = S.to[0].scrollLeft != cp.l) && (dx = 0,S.to.trigger('scroll')) );
if ((dy && t) || (dx && l) || S[0]==S.to[0]) return;
S.to=S.to.parent();
};
},
scrollParent : function(Sto,w) {
while (Sto && Sto[0] && S[0]!=Sto[0] && ((Sto[0].nodeType != 1 || Sto.css('overflow')=='visible') || Sto[0].tagName.toLowerCase() == 'a' || (!w && Sto.data('overflow')=='no-dragon')) ) Sto=Sto.parent();
return Sto;
},
isInBestPosition : function(Sto,Stoo,cp) {
var t = Sto.offset(),
p = Stoo.offset(),
h = Stoo.innerHeight()-cp.ph,
w = Stoo.innerWidth()-cp.pw;
if (Stoo[0]==document.body || Stoo[0]==$('html')[0] && Stoo[0]!==Sto[0]) {
t.top = t.top -Stoo[0].scrollTop;
t.left= t.left-Stoo[0].scrollLeft;
};
return p.top+(h<0?0:h) >= t.top && p.top+(h>0?0:h) <= t.top &&
p.left+(w<0?0:w) >= t.left && p.left+(w>0?0:w) <= t.left || Sto.css('position')=='fixed';
},
onWhell: function (e, delta) {
if (_this.bypass) return (_this.bypass=false,true);
var cnd = $(e.target).closest('[data-overflow=no-dragon]');
_this.moment={};
var SSto,cp,st,sl,t,l,ph,pw,et,ad
E = e.originalEvent;
_this.mx = 1; _this.my = 1;
S.to = $( cnd.length? cnd.parent(): e.target );
delta = _this.round(delta || (E.wheelDelta || E.wheelDeltaY || E.wheelDeltaX ) >> 1 || (-(E.deltaX || E.deltaY || E.deltaZ)<<(E.deltaMode && E.deltaMode<<2)<<1));
ad=_this.abs(delta>>1);
do {
S.to = _this.scrollParent(S.to,1);
S.too=(SSto = S.to[0]!=S[0])?_this.scrollParent(S.to.parent(),1):S;
cp = _this.getCurPos();
if (_this.isInBestPosition(S.to,S.too,cp)) {
if ( cp.maxY > 0) {
S.to.scrollTop ( (t = cp.t - delta) < 0 ? 0 : (t > cp.maxY ? cp.maxY : t) );
if ( S.to.scrollTop()!=cp.t) (e.preventDefault(),e.stopPropagation(),S.to.trigger('scroll',[false,false]),delta=0);
};
if (delta && cp.maxX > 0) {
S.to.scrollLeft( (t = cp.l - delta) > 0 ? (t > cp.maxX ? cp.maxX : t) : 0);
if ( S.to.scrollLeft()!=cp.l ) (e.preventDefault(),e.stopPropagation(),S.to.trigger('scroll',[true,true]),delta=0);
};
};
} while (delta && SSto && (S.to=S.to.parent()) );
return this;
},
onHold: function (e) {
_this.moment={};
var o=_this.opt,b,et = (e.target.tagName || e.target.localName || e.target.nodeName).toLowerCase(),
E=e.type.indexOf('touch')+1?e.originalEvent.touches[0]:e;
if (et in o.exclusion) return;
S.too = S.to = $((this === e.target) ? this : e.target);
_this.mx=S.to.hasClass('bBarOn')?-1:1;
_this.my=S.to.hasClass('rBarOn')?-1:1;
if ( _this.mx+_this.my>0 && S.too.closest(o.exclusion.id).length ) return;
('mousedown'.indexOf(e.type)+1) && (e.preventDefault(), e.stopPropagation());
_this.moment = S.holdPos = { 'x': E.screenX, 'y': E.screenY };
_this.moment.startTime=+new Date();
S.on(o.draggEvents,_this.onDragg).on(o.releaseEvents+' '+o.leaveEvents,_this.onRelease).on(o.releaseEvents, S.too, _this.onRelease);
_this.noButtonHold = false;
_this.SAH && _this.SAH.off('scroll.dragon', _this.onScrollAfterHold);
(_this.SAH = S.too).on('scroll.dragon', _this.onScrollAfterHold);
},
onScrollAfterHold: function (e) {
_this.moment = {};
_this.noButtonHold = true;
_this.SAH.off('scroll.dragon', _this.onScrollAfterHold);
},
onDragg: function (e) {
_this.SAH && (_this.SAH.off('scroll.dragon', _this.onScrollAfterHold), _this.SAH = null);
if (!(e.originalEvent.touches || e.originalEvent.changedTouches) && _this.noButtonHold && !(e.which + e.button))
return _this.onRelease(e);
var E=e.type.indexOf('touch')+1?e.originalEvent[e.originalEvent.touches.length?'touches':'changedTouches'][0]:e;
var cnd = $(e.target).closest('[data-overflow=no-dragon]');
if ( def.touchEvents.indexOf( e.type )+1 )
e.preventDefault(), e.stopPropagation();
var x = E.screenX,
y = E.screenY,
dx = x - S.holdPos.x,
dy = y - S.holdPos.y;
S.to = $(cnd.length? cnd.parent(): e.target);
S.holdPos = { 'x': x, 'y': y };
_this.setCurPos(dx*_this.mx, dy*_this.my);
},
onRelease: function (e) {
var sm=_this.moment,
o=_this.opt,
E=e.type.indexOf('touch')+1?e.originalEvent[e.originalEvent.touches.length?'touches':'changedTouches'][0]:e;
if (sm && o.easing) {
sm.vector={y:E.screenY-sm.y,x:E.screenX-sm.x};
sm.snatch=(+new Date()-sm.startTime);
sm.speedX=_this.mx*((sm.vector.x>0)?1:-1)*sm.vector.x*sm.vector.x/(sm.snatch<<1);
sm.speedY=_this.my*((sm.vector.y>0)?1:-1)*sm.vector.y*sm.vector.y/(sm.snatch<<1);
if (sm.snatch<350) sm.ORE=setTimeout(_this.onReleaseEasing,10);
} else _this.moment=null;
if ('mouseup mouseleave'.indexOf(e.type)+1) (e.preventDefault(), e.stopPropagation(), e.stopImmediatePropagation());
_this.SAH && (_this.SAH.off('scroll.dragon', _this.onScrollAfterHold), _this.SAH = null);
S.off(o.draggEvents,_this.onDragg).off(o.releaseEvents+' '+o.leaveEvents,_this.onRelease).off(o.releaseEvents, '**', _this.onRelease);
return _this;
},
onReleaseEasing: function (e) {
var sm=_this.moment;
if (!sm) return;
S.to=S.too;
_this.setCurPos(sm.speedX*=0.98, sm.speedY*=0.98);
sm.ORE=((sm.speedX+sm.speedX)<<1>>1||(sm.speedY+sm.speedY)<<1>>1)?setTimeout(_this.onReleaseEasing,10):null;
},
onKeyDown: function (e) {
var so,to,too,ek=e.which,sm=_this.moment||{},wh=$(window).innerHeight(),sy;
sm.speedX = (ek in {37:0,100:0}?2:(ek in {39:0,102:0}?-2:0 ) );
sm.speedY = (ek in {38:0,104:0}?1:(ek in {40:0,98:0}?-1:(ek in {33:0,105:0}? (so=Math.sqrt(Math.sqrt(wh)))*Math.sqrt(so/3)-4 :(ek in {34:0,99:0}? -(so=Math.sqrt(Math.sqrt(wh)))*Math.sqrt(so/3)+4 :(ek in {35:0,97:0}?-88:(ek in {36:0,103:0}?88:0) ) ) ) ) );
if (!(sm.speedX||sm.speedY) || (sy=_this.abs(sm.speedY))>15 && e.type=='keydown' || sy<15 && e.type=='keyup') return;
if (sm.key!=ek) {
sm.key=ek;
to = too = $(S);
while (to.length &&
!( sm.speedY && ( to[0].scrollHeight-to.innerHeight()>2
&& (so=to.offset()).left<=(ek=$(window).innerWidth ()-to.innerWidth())
&& (so.left>=0 || ek<0 && so.left>=ek) )
|| sm.speedX && ( to[0].scrollWidth -to.innerWidth() >2
&& (so=to.offset()).top <=(ek=wh-to.innerHeight())
&& (so.top >=0 || ek<0 && so.top >=ek) )
))
(to=to.slice(1)).length || (to=too=too.children());
S.too = to.eq(0) || S.too;
};
_this.onReleaseEasing();
e.preventDefault(); e.stopPropagation();
}
};
S.on({'DragOn.toggle':_this.toggle,
'DragOn.remove':function() {_this.on||_this.toggle();Bo=null;S.off('DragOn.toggle DragOn.remove DragOn.option')},
'DragOn.option':function(e,prop) {if (e) e.stopPropagation(); return (prop)? (typeof prop=='object')?_this.option=prop:_this.option[prop] :_this.option; }
});
return _this.toggle();
}
});
$('.dragon').dragOn()
});