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AUI.add( | |
'animated-scroll', | |
function(A) { | |
// Yes, user agent sniffing. | |
var scrollTarget = /webkit/i.test(navigator.userAgent) || document.compatMode == 'BackCompat' ? | |
document.body : | |
document.documentElement;; | |
var win = A.getWin(); | |
var DURATION = 'duration', | |
LEFT = 'left', | |
SCROLL_TOP = 'scrollTop', | |
SCROLL_LEFT = 'scrollLeft', | |
TOP = 'top', | |
TO = 'to', | |
X = 'x', | |
Y = 'y'; | |
var __animations = {}; | |
var __lockHandle = null; | |
// We're working only on the window, so in environments without the cached sandbox this is important. | |
if (A.Global.scrollTo) { | |
A.scrollTo = A.Global.scrollTo; | |
return; | |
} | |
A.Global.animatedScrollConfig = { | |
duration: 0.8, | |
stopOnInteraction: false | |
}; | |
function scrollTo(value, direction) { | |
if (A.Array.test(value)) { | |
scrollTo(value[0], SCROLL_LEFT); | |
scrollTo(value[1], SCROLL_TOP); | |
return; | |
} | |
direction || (direction = SCROLL_TOP); | |
if (direction === Y || direction === TOP) { | |
direction = SCROLL_TOP; | |
} | |
else if (direction === X || direction === LEFT) { | |
direction = SCROLL_LEFT; | |
} | |
stopAnimation(direction); | |
getAnimation(value, direction).run(); | |
} | |
function stopAnimation(direction) { | |
var anim = __animations[direction]; | |
if (anim) { | |
unlockInteraction(); | |
anim.stop(); | |
} | |
} | |
function getAnimation(value, direction) { | |
var anim = __animations[direction]; | |
var props = {}; | |
props[direction] = Math.round(value); | |
if (!anim) { | |
anim = __animations[direction] = new A.Anim({ | |
node: scrollTarget, | |
duration: A.Global.animatedScrollConfig.duration, | |
easing: A.Easing.easeOut, | |
to: props | |
}); | |
anim.on({ | |
start: lockInteraction, | |
end: unlockInteraction | |
}) | |
} | |
else { | |
anim.set(TO, props); | |
anim.set(DURATION, A.Global.animatedScrollConfig.duration); | |
} | |
return anim; | |
} | |
function preventDefault(event) { | |
if (A.Global.animatedScrollConfig.stopOnInteraction) { | |
stopAnimation(); | |
} | |
else { | |
event.preventDefault(); | |
} | |
} | |
function lockInteraction() { | |
if (!__lockHandle) { | |
__lockHandle = win.on({ | |
keydown: preventDefault, | |
keypress: preventDefault, | |
keyup: preventDefault, | |
mousewheel: preventDefault | |
}); | |
} | |
} | |
function unlockInteraction() { | |
if (__lockHandle) { | |
__lockHandle.detach(); | |
__lockHandle = null; | |
} | |
} | |
A.Global.scrollTo = A.scrollTo = scrollTo; | |
}, | |
'', | |
{ | |
requires: ['aui-base', 'anim'] | |
} | |
); |
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// Automatic animated scroll | |
AUI().use( | |
'animated-scroll', | |
function(A) { | |
A.getBody().delegate( | |
'click', | |
function(event) { | |
var highlighted = A.one(event.currentTarget.get('hash')); | |
if (!highlighted) { | |
return; | |
} | |
event.preventDefault(); | |
A.scrollTo(highlighted.getXY()) | |
}, | |
'[href^="#"]' | |
); | |
} | |
); |
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