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PortableMag/ext-lib/iscroll-probe.js
Alex A. Naanou fc8b17910e migrated to iScroll5 and a partial rewrite... 
Signed-off-by: Alex A. Naanou <alex.nanou@gmail.com>
2014-04-19 13:38:44 +04:00

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/*! iScroll v5.1.1 ~ (c) 2008-2014 Matteo Spinelli ~ http://cubiq.org/license */
(function (window, document, Math) {
var rAF = window.requestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.oRequestAnimationFrame ||
window.msRequestAnimationFrame ||
function (callback) { window.setTimeout(callback, 1000 / 60); };
var utils = (function () {
var me = {};
var _elementStyle = document.createElement('div').style;
var _vendor = (function () {
var vendors = ['t', 'webkitT', 'MozT', 'msT', 'OT'],
transform,
i = 0,
l = vendors.length;
for ( ; i < l; i++ ) {
transform = vendors[i] + 'ransform';
if ( transform in _elementStyle ) return vendors[i].substr(0, vendors[i].length-1);
}
return false;
})();
function _prefixStyle (style) {
if ( _vendor === false ) return false;
if ( _vendor === '' ) return style;
return _vendor + style.charAt(0).toUpperCase() + style.substr(1);
}
me.getTime = Date.now || function getTime () { return new Date().getTime(); };
me.extend = function (target, obj) {
for ( var i in obj ) {
target[i] = obj[i];
}
};
me.addEvent = function (el, type, fn, capture) {
el.addEventListener(type, fn, !!capture);
};
me.removeEvent = function (el, type, fn, capture) {
el.removeEventListener(type, fn, !!capture);
};
me.momentum = function (current, start, time, lowerMargin, wrapperSize, deceleration) {
var distance = current - start,
speed = Math.abs(distance) / time,
destination,
duration;
deceleration = deceleration === undefined ? 0.0006 : deceleration;
destination = current + ( speed * speed ) / ( 2 * deceleration ) * ( distance < 0 ? -1 : 1 );
duration = speed / deceleration;
if ( destination < lowerMargin ) {
destination = wrapperSize ? lowerMargin - ( wrapperSize / 2.5 * ( speed / 8 ) ) : lowerMargin;
distance = Math.abs(destination - current);
duration = distance / speed;
} else if ( destination > 0 ) {
destination = wrapperSize ? wrapperSize / 2.5 * ( speed / 8 ) : 0;
distance = Math.abs(current) + destination;
duration = distance / speed;
}
return {
destination: Math.round(destination),
duration: duration
};
};
var _transform = _prefixStyle('transform');
me.extend(me, {
hasTransform: _transform !== false,
hasPerspective: _prefixStyle('perspective') in _elementStyle,
hasTouch: 'ontouchstart' in window,
hasPointer: navigator.msPointerEnabled,
hasTransition: _prefixStyle('transition') in _elementStyle
});
// This should find all Android browsers lower than build 535.19 (both stock browser and webview)
me.isBadAndroid = /Android /.test(window.navigator.appVersion) && !(/Chrome\/\d/.test(window.navigator.appVersion));
me.extend(me.style = {}, {
transform: _transform,
transitionTimingFunction: _prefixStyle('transitionTimingFunction'),
transitionDuration: _prefixStyle('transitionDuration'),
transitionDelay: _prefixStyle('transitionDelay'),
transformOrigin: _prefixStyle('transformOrigin')
});
me.hasClass = function (e, c) {
var re = new RegExp("(^|\\s)" + c + "(\\s|$)");
return re.test(e.className);
};
me.addClass = function (e, c) {
if ( me.hasClass(e, c) ) {
return;
}
var newclass = e.className.split(' ');
newclass.push(c);
e.className = newclass.join(' ');
};
me.removeClass = function (e, c) {
if ( !me.hasClass(e, c) ) {
return;
}
var re = new RegExp("(^|\\s)" + c + "(\\s|$)", 'g');
e.className = e.className.replace(re, ' ');
};
me.offset = function (el) {
var left = -el.offsetLeft,
top = -el.offsetTop;
// jshint -W084
while (el = el.offsetParent) {
left -= el.offsetLeft;
top -= el.offsetTop;
}
// jshint +W084
return {
left: left,
top: top
};
};
me.preventDefaultException = function (el, exceptions) {
for ( var i in exceptions ) {
if ( exceptions[i].test(el[i]) ) {
return true;
}
}
return false;
};
me.extend(me.eventType = {}, {
touchstart: 1,
touchmove: 1,
touchend: 1,
mousedown: 2,
mousemove: 2,
mouseup: 2,
MSPointerDown: 3,
MSPointerMove: 3,
MSPointerUp: 3
});
me.extend(me.ease = {}, {
quadratic: {
style: 'cubic-bezier(0.25, 0.46, 0.45, 0.94)',
fn: function (k) {
return k * ( 2 - k );
}
},
circular: {
style: 'cubic-bezier(0.1, 0.57, 0.1, 1)', // Not properly "circular" but this looks better, it should be (0.075, 0.82, 0.165, 1)
fn: function (k) {
return Math.sqrt( 1 - ( --k * k ) );
}
},
back: {
style: 'cubic-bezier(0.175, 0.885, 0.32, 1.275)',
fn: function (k) {
var b = 4;
return ( k = k - 1 ) * k * ( ( b + 1 ) * k + b ) + 1;
}
},
bounce: {
style: '',
fn: function (k) {
if ( ( k /= 1 ) < ( 1 / 2.75 ) ) {
return 7.5625 * k * k;
} else if ( k < ( 2 / 2.75 ) ) {
return 7.5625 * ( k -= ( 1.5 / 2.75 ) ) * k + 0.75;
} else if ( k < ( 2.5 / 2.75 ) ) {
return 7.5625 * ( k -= ( 2.25 / 2.75 ) ) * k + 0.9375;
} else {
return 7.5625 * ( k -= ( 2.625 / 2.75 ) ) * k + 0.984375;
}
}
},
elastic: {
style: '',
fn: function (k) {
var f = 0.22,
e = 0.4;
if ( k === 0 ) { return 0; }
if ( k == 1 ) { return 1; }
return ( e * Math.pow( 2, - 10 * k ) * Math.sin( ( k - f / 4 ) * ( 2 * Math.PI ) / f ) + 1 );
}
}
});
me.tap = function (e, eventName) {
var ev = document.createEvent('Event');
ev.initEvent(eventName, true, true);
ev.pageX = e.pageX;
ev.pageY = e.pageY;
e.target.dispatchEvent(ev);
};
me.click = function (e) {
var target = e.target,
ev;
if ( !(/(SELECT|INPUT|TEXTAREA)/i).test(target.tagName) ) {
ev = document.createEvent('MouseEvents');
ev.initMouseEvent('click', true, true, e.view, 1,
target.screenX, target.screenY, target.clientX, target.clientY,
e.ctrlKey, e.altKey, e.shiftKey, e.metaKey,
0, null);
ev._constructed = true;
target.dispatchEvent(ev);
}
};
return me;
})();
function IScroll (el, options) {
this.wrapper = typeof el == 'string' ? document.querySelector(el) : el;
this.scroller = this.wrapper.children[0];
this.scrollerStyle = this.scroller.style; // cache style for better performance
this.options = {
resizeScrollbars: true,
mouseWheelSpeed: 20,
snapThreshold: 0.334,
// INSERT POINT: OPTIONS
startX: 0,
startY: 0,
scrollY: true,
directionLockThreshold: 5,
momentum: true,
bounce: true,
bounceTime: 600,
bounceEasing: '',
preventDefault: true,
preventDefaultException: { tagName: /^(INPUT|TEXTAREA|BUTTON|SELECT)$/ },
HWCompositing: true,
useTransition: true,
useTransform: true
};
for ( var i in options ) {
this.options[i] = options[i];
}
// Normalize options
this.translateZ = this.options.HWCompositing && utils.hasPerspective ? ' translateZ(0)' : '';
this.options.useTransition = utils.hasTransition && this.options.useTransition;
this.options.useTransform = utils.hasTransform && this.options.useTransform;
this.options.eventPassthrough = this.options.eventPassthrough === true ? 'vertical' : this.options.eventPassthrough;
this.options.preventDefault = !this.options.eventPassthrough && this.options.preventDefault;
// If you want eventPassthrough I have to lock one of the axes
this.options.scrollY = this.options.eventPassthrough == 'vertical' ? false : this.options.scrollY;
this.options.scrollX = this.options.eventPassthrough == 'horizontal' ? false : this.options.scrollX;
// With eventPassthrough we also need lockDirection mechanism
this.options.freeScroll = this.options.freeScroll && !this.options.eventPassthrough;
this.options.directionLockThreshold = this.options.eventPassthrough ? 0 : this.options.directionLockThreshold;
this.options.bounceEasing = typeof this.options.bounceEasing == 'string' ? utils.ease[this.options.bounceEasing] || utils.ease.circular : this.options.bounceEasing;
this.options.resizePolling = this.options.resizePolling === undefined ? 60 : this.options.resizePolling;
if ( this.options.tap === true ) {
this.options.tap = 'tap';
}
if ( this.options.shrinkScrollbars == 'scale' ) {
this.options.useTransition = false;
}
this.options.invertWheelDirection = this.options.invertWheelDirection ? -1 : 1;
if ( this.options.probeType == 3 ) {
this.options.useTransition = false; }
// INSERT POINT: NORMALIZATION
// Some defaults
this.x = 0;
this.y = 0;
this.directionX = 0;
this.directionY = 0;
this._events = {};
// INSERT POINT: DEFAULTS
this._init();
this.refresh();
this.scrollTo(this.options.startX, this.options.startY);
this.enable();
}
IScroll.prototype = {
version: '5.1.1',
_init: function () {
this._initEvents();
if ( this.options.scrollbars || this.options.indicators ) {
this._initIndicators();
}
if ( this.options.mouseWheel ) {
this._initWheel();
}
if ( this.options.snap ) {
this._initSnap();
}
if ( this.options.keyBindings ) {
this._initKeys();
}
// INSERT POINT: _init
},
destroy: function () {
this._initEvents(true);
this._execEvent('destroy');
},
_transitionEnd: function (e) {
if ( e.target != this.scroller || !this.isInTransition ) {
return;
}
this._transitionTime();
if ( !this.resetPosition(this.options.bounceTime) ) {
this.isInTransition = false;
this._execEvent('scrollEnd');
}
},
_start: function (e) {
// React to left mouse button only
if ( utils.eventType[e.type] != 1 ) {
if ( e.button !== 0 ) {
return;
}
}
if ( !this.enabled || (this.initiated && utils.eventType[e.type] !== this.initiated) ) {
return;
}
if ( this.options.preventDefault && !utils.isBadAndroid && !utils.preventDefaultException(e.target, this.options.preventDefaultException) ) {
e.preventDefault();
}
var point = e.touches ? e.touches[0] : e,
pos;
this.initiated = utils.eventType[e.type];
this.moved = false;
this.distX = 0;
this.distY = 0;
this.directionX = 0;
this.directionY = 0;
this.directionLocked = 0;
this._transitionTime();
this.startTime = utils.getTime();
if ( this.options.useTransition && this.isInTransition ) {
this.isInTransition = false;
pos = this.getComputedPosition();
this._translate(Math.round(pos.x), Math.round(pos.y));
this._execEvent('scrollEnd');
} else if ( !this.options.useTransition && this.isAnimating ) {
this.isAnimating = false;
this._execEvent('scrollEnd');
}
this.startX = this.x;
this.startY = this.y;
this.absStartX = this.x;
this.absStartY = this.y;
this.pointX = point.pageX;
this.pointY = point.pageY;
this._execEvent('beforeScrollStart');
},
_move: function (e) {
if ( !this.enabled || utils.eventType[e.type] !== this.initiated ) {
return;
}
if ( this.options.preventDefault ) { // increases performance on Android? TODO: check!
e.preventDefault();
}
var point = e.touches ? e.touches[0] : e,
deltaX = point.pageX - this.pointX,
deltaY = point.pageY - this.pointY,
timestamp = utils.getTime(),
newX, newY,
absDistX, absDistY;
this.pointX = point.pageX;
this.pointY = point.pageY;
this.distX += deltaX;
this.distY += deltaY;
absDistX = Math.abs(this.distX);
absDistY = Math.abs(this.distY);
// We need to move at least 10 pixels for the scrolling to initiate
if ( timestamp - this.endTime > 300 && (absDistX < 10 && absDistY < 10) ) {
return;
}
// If you are scrolling in one direction lock the other
if ( !this.directionLocked && !this.options.freeScroll ) {
if ( absDistX > absDistY + this.options.directionLockThreshold ) {
this.directionLocked = 'h'; // lock horizontally
} else if ( absDistY >= absDistX + this.options.directionLockThreshold ) {
this.directionLocked = 'v'; // lock vertically
} else {
this.directionLocked = 'n'; // no lock
}
}
if ( this.directionLocked == 'h' ) {
if ( this.options.eventPassthrough == 'vertical' ) {
e.preventDefault();
} else if ( this.options.eventPassthrough == 'horizontal' ) {
this.initiated = false;
return;
}
deltaY = 0;
} else if ( this.directionLocked == 'v' ) {
if ( this.options.eventPassthrough == 'horizontal' ) {
e.preventDefault();
} else if ( this.options.eventPassthrough == 'vertical' ) {
this.initiated = false;
return;
}
deltaX = 0;
}
deltaX = this.hasHorizontalScroll ? deltaX : 0;
deltaY = this.hasVerticalScroll ? deltaY : 0;
newX = this.x + deltaX;
newY = this.y + deltaY;
// Slow down if outside of the boundaries
if ( newX > 0 || newX < this.maxScrollX ) {
newX = this.options.bounce ? this.x + deltaX / 3 : newX > 0 ? 0 : this.maxScrollX;
}
if ( newY > 0 || newY < this.maxScrollY ) {
newY = this.options.bounce ? this.y + deltaY / 3 : newY > 0 ? 0 : this.maxScrollY;
}
this.directionX = deltaX > 0 ? -1 : deltaX < 0 ? 1 : 0;
this.directionY = deltaY > 0 ? -1 : deltaY < 0 ? 1 : 0;
if ( !this.moved ) {
this._execEvent('scrollStart');
}
this.moved = true;
this._translate(newX, newY);
/* REPLACE START: _move */
if ( timestamp - this.startTime > 300 ) {
this.startTime = timestamp;
this.startX = this.x;
this.startY = this.y;
if ( this.options.probeType == 1 ) {
this._execEvent('scroll');
}
}
if ( this.options.probeType > 1 ) {
this._execEvent('scroll');
}
/* REPLACE END: _move */
},
_end: function (e) {
if ( !this.enabled || utils.eventType[e.type] !== this.initiated ) {
return;
}
if ( this.options.preventDefault && !utils.preventDefaultException(e.target, this.options.preventDefaultException) ) {
e.preventDefault();
}
var point = e.changedTouches ? e.changedTouches[0] : e,
momentumX,
momentumY,
duration = utils.getTime() - this.startTime,
newX = Math.round(this.x),
newY = Math.round(this.y),
distanceX = Math.abs(newX - this.startX),
distanceY = Math.abs(newY - this.startY),
time = 0,
easing = '';
this.isInTransition = 0;
this.initiated = 0;
this.endTime = utils.getTime();
// reset if we are outside of the boundaries
if ( this.resetPosition(this.options.bounceTime) ) {
return;
}
this.scrollTo(newX, newY); // ensures that the last position is rounded
// we scrolled less than 10 pixels
if ( !this.moved ) {
if ( this.options.tap ) {
utils.tap(e, this.options.tap);
}
if ( this.options.click ) {
utils.click(e);
}
this._execEvent('scrollCancel');
return;
}
if ( this._events.flick && duration < 200 && distanceX < 100 && distanceY < 100 ) {
this._execEvent('flick');
return;
}
// start momentum animation if needed
if ( this.options.momentum && duration < 300 ) {
momentumX = this.hasHorizontalScroll ? utils.momentum(this.x, this.startX, duration, this.maxScrollX, this.options.bounce ? this.wrapperWidth : 0, this.options.deceleration) : { destination: newX, duration: 0 };
momentumY = this.hasVerticalScroll ? utils.momentum(this.y, this.startY, duration, this.maxScrollY, this.options.bounce ? this.wrapperHeight : 0, this.options.deceleration) : { destination: newY, duration: 0 };
newX = momentumX.destination;
newY = momentumY.destination;
time = Math.max(momentumX.duration, momentumY.duration);
this.isInTransition = 1;
}
if ( this.options.snap ) {
var snap = this._nearestSnap(newX, newY);
this.currentPage = snap;
time = this.options.snapSpeed || Math.max(
Math.max(
Math.min(Math.abs(newX - snap.x), 1000),
Math.min(Math.abs(newY - snap.y), 1000)
), 300);
newX = snap.x;
newY = snap.y;
this.directionX = 0;
this.directionY = 0;
easing = this.options.bounceEasing;
}
// INSERT POINT: _end
if ( newX != this.x || newY != this.y ) {
// change easing function when scroller goes out of the boundaries
if ( newX > 0 || newX < this.maxScrollX || newY > 0 || newY < this.maxScrollY ) {
easing = utils.ease.quadratic;
}
this.scrollTo(newX, newY, time, easing);
return;
}
this._execEvent('scrollEnd');
},
_resize: function () {
var that = this;
clearTimeout(this.resizeTimeout);
this.resizeTimeout = setTimeout(function () {
that.refresh();
}, this.options.resizePolling);
},
resetPosition: function (time) {
var x = this.x,
y = this.y;
time = time || 0;
if ( !this.hasHorizontalScroll || this.x > 0 ) {
x = 0;
} else if ( this.x < this.maxScrollX ) {
x = this.maxScrollX;
}
if ( !this.hasVerticalScroll || this.y > 0 ) {
y = 0;
} else if ( this.y < this.maxScrollY ) {
y = this.maxScrollY;
}
if ( x == this.x && y == this.y ) {
return false;
}
this.scrollTo(x, y, time, this.options.bounceEasing);
return true;
},
disable: function () {
this.enabled = false;
},
enable: function () {
this.enabled = true;
},
refresh: function () {
var rf = this.wrapper.offsetHeight; // Force reflow
this.wrapperWidth = this.wrapper.clientWidth;
this.wrapperHeight = this.wrapper.clientHeight;
/* REPLACE START: refresh */
this.scrollerWidth = this.scroller.offsetWidth;
this.scrollerHeight = this.scroller.offsetHeight;
this.maxScrollX = this.wrapperWidth - this.scrollerWidth;
this.maxScrollY = this.wrapperHeight - this.scrollerHeight;
/* REPLACE END: refresh */
this.hasHorizontalScroll = this.options.scrollX && this.maxScrollX < 0;
this.hasVerticalScroll = this.options.scrollY && this.maxScrollY < 0;
if ( !this.hasHorizontalScroll ) {
this.maxScrollX = 0;
this.scrollerWidth = this.wrapperWidth;
}
if ( !this.hasVerticalScroll ) {
this.maxScrollY = 0;
this.scrollerHeight = this.wrapperHeight;
}
this.endTime = 0;
this.directionX = 0;
this.directionY = 0;
this.wrapperOffset = utils.offset(this.wrapper);
this._execEvent('refresh');
this.resetPosition();
// INSERT POINT: _refresh
},
on: function (type, fn) {
if ( !this._events[type] ) {
this._events[type] = [];
}
this._events[type].push(fn);
},
off: function (type, fn) {
if ( !this._events[type] ) {
return;
}
var index = this._events[type].indexOf(fn);
if ( index > -1 ) {
this._events[type].splice(index, 1);
}
},
_execEvent: function (type) {
if ( !this._events[type] ) {
return;
}
var i = 0,
l = this._events[type].length;
if ( !l ) {
return;
}
for ( ; i < l; i++ ) {
this._events[type][i].apply(this, [].slice.call(arguments, 1));
}
},
scrollBy: function (x, y, time, easing) {
x = this.x + x;
y = this.y + y;
time = time || 0;
this.scrollTo(x, y, time, easing);
},
scrollTo: function (x, y, time, easing) {
easing = easing || utils.ease.circular;
this.isInTransition = this.options.useTransition && time > 0;
if ( !time || (this.options.useTransition && easing.style) ) {
this._transitionTimingFunction(easing.style);
this._transitionTime(time);
this._translate(x, y);
} else {
this._animate(x, y, time, easing.fn);
}
},
scrollToElement: function (el, time, offsetX, offsetY, easing) {
el = el.nodeType ? el : this.scroller.querySelector(el);
if ( !el ) {
return;
}
var pos = utils.offset(el);
pos.left -= this.wrapperOffset.left;
pos.top -= this.wrapperOffset.top;
// if offsetX/Y are true we center the element to the screen
if ( offsetX === true ) {
offsetX = Math.round(el.offsetWidth / 2 - this.wrapper.offsetWidth / 2);
}
if ( offsetY === true ) {
offsetY = Math.round(el.offsetHeight / 2 - this.wrapper.offsetHeight / 2);
}
pos.left -= offsetX || 0;
pos.top -= offsetY || 0;
pos.left = pos.left > 0 ? 0 : pos.left < this.maxScrollX ? this.maxScrollX : pos.left;
pos.top = pos.top > 0 ? 0 : pos.top < this.maxScrollY ? this.maxScrollY : pos.top;
time = time === undefined || time === null || time === 'auto' ? Math.max(Math.abs(this.x-pos.left), Math.abs(this.y-pos.top)) : time;
this.scrollTo(pos.left, pos.top, time, easing);
},
_transitionTime: function (time) {
time = time || 0;
this.scrollerStyle[utils.style.transitionDuration] = time + 'ms';
if ( !time && utils.isBadAndroid ) {
this.scrollerStyle[utils.style.transitionDuration] = '0.001s';
}
if ( this.indicators ) {
for ( var i = this.indicators.length; i--; ) {
this.indicators[i].transitionTime(time);
}
}
// INSERT POINT: _transitionTime
},
_transitionTimingFunction: function (easing) {
this.scrollerStyle[utils.style.transitionTimingFunction] = easing;
if ( this.indicators ) {
for ( var i = this.indicators.length; i--; ) {
this.indicators[i].transitionTimingFunction(easing);
}
}
// INSERT POINT: _transitionTimingFunction
},
_translate: function (x, y) {
if ( this.options.useTransform ) {
/* REPLACE START: _translate */
this.scrollerStyle[utils.style.transform] = 'translate(' + x + 'px,' + y + 'px)' + this.translateZ;
/* REPLACE END: _translate */
} else {
x = Math.round(x);
y = Math.round(y);
this.scrollerStyle.left = x + 'px';
this.scrollerStyle.top = y + 'px';
}
this.x = x;
this.y = y;
if ( this.indicators ) {
for ( var i = this.indicators.length; i--; ) {
this.indicators[i].updatePosition();
}
}
// INSERT POINT: _translate
},
_initEvents: function (remove) {
var eventType = remove ? utils.removeEvent : utils.addEvent,
target = this.options.bindToWrapper ? this.wrapper : window;
eventType(window, 'orientationchange', this);
eventType(window, 'resize', this);
if ( this.options.click ) {
eventType(this.wrapper, 'click', this, true);
}
if ( !this.options.disableMouse ) {
eventType(this.wrapper, 'mousedown', this);
eventType(target, 'mousemove', this);
eventType(target, 'mousecancel', this);
eventType(target, 'mouseup', this);
}
if ( utils.hasPointer && !this.options.disablePointer ) {
eventType(this.wrapper, 'MSPointerDown', this);
eventType(target, 'MSPointerMove', this);
eventType(target, 'MSPointerCancel', this);
eventType(target, 'MSPointerUp', this);
}
if ( utils.hasTouch && !this.options.disableTouch ) {
eventType(this.wrapper, 'touchstart', this);
eventType(target, 'touchmove', this);
eventType(target, 'touchcancel', this);
eventType(target, 'touchend', this);
}
eventType(this.scroller, 'transitionend', this);
eventType(this.scroller, 'webkitTransitionEnd', this);
eventType(this.scroller, 'oTransitionEnd', this);
eventType(this.scroller, 'MSTransitionEnd', this);
},
getComputedPosition: function () {
var matrix = window.getComputedStyle(this.scroller, null),
x, y;
if ( this.options.useTransform ) {
matrix = matrix[utils.style.transform].split(')')[0].split(', ');
x = +(matrix[12] || matrix[4]);
y = +(matrix[13] || matrix[5]);
} else {
x = +matrix.left.replace(/[^-\d.]/g, '');
y = +matrix.top.replace(/[^-\d.]/g, '');
}
return { x: x, y: y };
},
_initIndicators: function () {
var interactive = this.options.interactiveScrollbars,
customStyle = typeof this.options.scrollbars != 'string',
indicators = [],
indicator;
var that = this;
this.indicators = [];
if ( this.options.scrollbars ) {
// Vertical scrollbar
if ( this.options.scrollY ) {
indicator = {
el: createDefaultScrollbar('v', interactive, this.options.scrollbars),
interactive: interactive,
defaultScrollbars: true,
customStyle: customStyle,
resize: this.options.resizeScrollbars,
shrink: this.options.shrinkScrollbars,
fade: this.options.fadeScrollbars,
listenX: false
};
this.wrapper.appendChild(indicator.el);
indicators.push(indicator);
}
// Horizontal scrollbar
if ( this.options.scrollX ) {
indicator = {
el: createDefaultScrollbar('h', interactive, this.options.scrollbars),
interactive: interactive,
defaultScrollbars: true,
customStyle: customStyle,
resize: this.options.resizeScrollbars,
shrink: this.options.shrinkScrollbars,
fade: this.options.fadeScrollbars,
listenY: false
};
this.wrapper.appendChild(indicator.el);
indicators.push(indicator);
}
}
if ( this.options.indicators ) {
// TODO: check concat compatibility
indicators = indicators.concat(this.options.indicators);
}
for ( var i = indicators.length; i--; ) {
this.indicators.push( new Indicator(this, indicators[i]) );
}
// TODO: check if we can use array.map (wide compatibility and performance issues)
function _indicatorsMap (fn) {
for ( var i = that.indicators.length; i--; ) {
fn.call(that.indicators[i]);
}
}
if ( this.options.fadeScrollbars ) {
this.on('scrollEnd', function () {
_indicatorsMap(function () {
this.fade();
});
});
this.on('scrollCancel', function () {
_indicatorsMap(function () {
this.fade();
});
});
this.on('scrollStart', function () {
_indicatorsMap(function () {
this.fade(1);
});
});
this.on('beforeScrollStart', function () {
_indicatorsMap(function () {
this.fade(1, true);
});
});
}
this.on('refresh', function () {
_indicatorsMap(function () {
this.refresh();
});
});
this.on('destroy', function () {
_indicatorsMap(function () {
this.destroy();
});
delete this.indicators;
});
},
_initWheel: function () {
utils.addEvent(this.wrapper, 'wheel', this);
utils.addEvent(this.wrapper, 'mousewheel', this);
utils.addEvent(this.wrapper, 'DOMMouseScroll', this);
this.on('destroy', function () {
utils.removeEvent(this.wrapper, 'wheel', this);
utils.removeEvent(this.wrapper, 'mousewheel', this);
utils.removeEvent(this.wrapper, 'DOMMouseScroll', this);
});
},
_wheel: function (e) {
if ( !this.enabled ) {
return;
}
e.preventDefault();
e.stopPropagation();
var wheelDeltaX, wheelDeltaY,
newX, newY,
that = this;
if ( this.wheelTimeout === undefined ) {
that._execEvent('scrollStart');
}
// Execute the scrollEnd event after 400ms the wheel stopped scrolling
clearTimeout(this.wheelTimeout);
this.wheelTimeout = setTimeout(function () {
that._execEvent('scrollEnd');
that.wheelTimeout = undefined;
}, 400);
if ( 'deltaX' in e ) {
wheelDeltaX = -e.deltaX;
wheelDeltaY = -e.deltaY;
} else if ( 'wheelDeltaX' in e ) {
wheelDeltaX = e.wheelDeltaX / 120 * this.options.mouseWheelSpeed;
wheelDeltaY = e.wheelDeltaY / 120 * this.options.mouseWheelSpeed;
} else if ( 'wheelDelta' in e ) {
wheelDeltaX = wheelDeltaY = e.wheelDelta / 120 * this.options.mouseWheelSpeed;
} else if ( 'detail' in e ) {
wheelDeltaX = wheelDeltaY = -e.detail / 3 * this.options.mouseWheelSpeed;
} else {
return;
}
wheelDeltaX *= this.options.invertWheelDirection;
wheelDeltaY *= this.options.invertWheelDirection;
if ( !this.hasVerticalScroll ) {
wheelDeltaX = wheelDeltaY;
wheelDeltaY = 0;
}
if ( this.options.snap ) {
newX = this.currentPage.pageX;
newY = this.currentPage.pageY;
if ( wheelDeltaX > 0 ) {
newX--;
} else if ( wheelDeltaX < 0 ) {
newX++;
}
if ( wheelDeltaY > 0 ) {
newY--;
} else if ( wheelDeltaY < 0 ) {
newY++;
}
this.goToPage(newX, newY);
return;
}
newX = this.x + Math.round(this.hasHorizontalScroll ? wheelDeltaX : 0);
newY = this.y + Math.round(this.hasVerticalScroll ? wheelDeltaY : 0);
if ( newX > 0 ) {
newX = 0;
} else if ( newX < this.maxScrollX ) {
newX = this.maxScrollX;
}
if ( newY > 0 ) {
newY = 0;
} else if ( newY < this.maxScrollY ) {
newY = this.maxScrollY;
}
this.scrollTo(newX, newY, 0);
if ( this.options.probeType > 1 ) {
this._execEvent('scroll');
}
// INSERT POINT: _wheel
},
_initSnap: function () {
this.currentPage = {};
if ( typeof this.options.snap == 'string' ) {
this.options.snap = this.scroller.querySelectorAll(this.options.snap);
}
this.on('refresh', function () {
var i = 0, l,
m = 0, n,
cx, cy,
x = 0, y,
stepX = this.options.snapStepX || this.wrapperWidth,
stepY = this.options.snapStepY || this.wrapperHeight,
el;
this.pages = [];
if ( !this.wrapperWidth || !this.wrapperHeight || !this.scrollerWidth || !this.scrollerHeight ) {
return;
}
if ( this.options.snap === true ) {
cx = Math.round( stepX / 2 );
cy = Math.round( stepY / 2 );
while ( x > -this.scrollerWidth ) {
this.pages[i] = [];
l = 0;
y = 0;
while ( y > -this.scrollerHeight ) {
this.pages[i][l] = {
x: Math.max(x, this.maxScrollX),
y: Math.max(y, this.maxScrollY),
width: stepX,
height: stepY,
cx: x - cx,
cy: y - cy
};
y -= stepY;
l++;
}
x -= stepX;
i++;
}
} else {
el = this.options.snap;
l = el.length;
n = -1;
for ( ; i < l; i++ ) {
if ( i === 0 || el[i].offsetLeft <= el[i-1].offsetLeft ) {
m = 0;
n++;
}
if ( !this.pages[m] ) {
this.pages[m] = [];
}
x = Math.max(-el[i].offsetLeft, this.maxScrollX);
y = Math.max(-el[i].offsetTop, this.maxScrollY);
cx = x - Math.round(el[i].offsetWidth / 2);
cy = y - Math.round(el[i].offsetHeight / 2);
this.pages[m][n] = {
x: x,
y: y,
width: el[i].offsetWidth,
height: el[i].offsetHeight,
cx: cx,
cy: cy
};
if ( x > this.maxScrollX ) {
m++;
}
}
}
this.goToPage(this.currentPage.pageX || 0, this.currentPage.pageY || 0, 0);
// Update snap threshold if needed
if ( this.options.snapThreshold % 1 === 0 ) {
this.snapThresholdX = this.options.snapThreshold;
this.snapThresholdY = this.options.snapThreshold;
} else {
this.snapThresholdX = Math.round(this.pages[this.currentPage.pageX][this.currentPage.pageY].width * this.options.snapThreshold);
this.snapThresholdY = Math.round(this.pages[this.currentPage.pageX][this.currentPage.pageY].height * this.options.snapThreshold);
}
});
this.on('flick', function () {
var time = this.options.snapSpeed || Math.max(
Math.max(
Math.min(Math.abs(this.x - this.startX), 1000),
Math.min(Math.abs(this.y - this.startY), 1000)
), 300);
this.goToPage(
this.currentPage.pageX + this.directionX,
this.currentPage.pageY + this.directionY,
time
);
});
},
_nearestSnap: function (x, y) {
if ( !this.pages.length ) {
return { x: 0, y: 0, pageX: 0, pageY: 0 };
}
var i = 0,
l = this.pages.length,
m = 0;
// Check if we exceeded the snap threshold
if ( Math.abs(x - this.absStartX) < this.snapThresholdX &&
Math.abs(y - this.absStartY) < this.snapThresholdY ) {
return this.currentPage;
}
if ( x > 0 ) {
x = 0;
} else if ( x < this.maxScrollX ) {
x = this.maxScrollX;
}
if ( y > 0 ) {
y = 0;
} else if ( y < this.maxScrollY ) {
y = this.maxScrollY;
}
for ( ; i < l; i++ ) {
if ( x >= this.pages[i][0].cx ) {
x = this.pages[i][0].x;
break;
}
}
l = this.pages[i].length;
for ( ; m < l; m++ ) {
if ( y >= this.pages[0][m].cy ) {
y = this.pages[0][m].y;
break;
}
}
if ( i == this.currentPage.pageX ) {
i += this.directionX;
if ( i < 0 ) {
i = 0;
} else if ( i >= this.pages.length ) {
i = this.pages.length - 1;
}
x = this.pages[i][0].x;
}
if ( m == this.currentPage.pageY ) {
m += this.directionY;
if ( m < 0 ) {
m = 0;
} else if ( m >= this.pages[0].length ) {
m = this.pages[0].length - 1;
}
y = this.pages[0][m].y;
}
return {
x: x,
y: y,
pageX: i,
pageY: m
};
},
goToPage: function (x, y, time, easing) {
easing = easing || this.options.bounceEasing;
if ( x >= this.pages.length ) {
x = this.pages.length - 1;
} else if ( x < 0 ) {
x = 0;
}
if ( y >= this.pages[x].length ) {
y = this.pages[x].length - 1;
} else if ( y < 0 ) {
y = 0;
}
var posX = this.pages[x][y].x,
posY = this.pages[x][y].y;
time = time === undefined ? this.options.snapSpeed || Math.max(
Math.max(
Math.min(Math.abs(posX - this.x), 1000),
Math.min(Math.abs(posY - this.y), 1000)
), 300) : time;
this.currentPage = {
x: posX,
y: posY,
pageX: x,
pageY: y
};
this.scrollTo(posX, posY, time, easing);
},
next: function (time, easing) {
var x = this.currentPage.pageX,
y = this.currentPage.pageY;
x++;
if ( x >= this.pages.length && this.hasVerticalScroll ) {
x = 0;
y++;
}
this.goToPage(x, y, time, easing);
},
prev: function (time, easing) {
var x = this.currentPage.pageX,
y = this.currentPage.pageY;
x--;
if ( x < 0 && this.hasVerticalScroll ) {
x = 0;
y--;
}
this.goToPage(x, y, time, easing);
},
_initKeys: function (e) {
// default key bindings
var keys = {
pageUp: 33,
pageDown: 34,
end: 35,
home: 36,
left: 37,
up: 38,
right: 39,
down: 40
};
var i;
// if you give me characters I give you keycode
if ( typeof this.options.keyBindings == 'object' ) {
for ( i in this.options.keyBindings ) {
if ( typeof this.options.keyBindings[i] == 'string' ) {
this.options.keyBindings[i] = this.options.keyBindings[i].toUpperCase().charCodeAt(0);
}
}
} else {
this.options.keyBindings = {};
}
for ( i in keys ) {
this.options.keyBindings[i] = this.options.keyBindings[i] || keys[i];
}
utils.addEvent(window, 'keydown', this);
this.on('destroy', function () {
utils.removeEvent(window, 'keydown', this);
});
},
_key: function (e) {
if ( !this.enabled ) {
return;
}
var snap = this.options.snap, // we are using this alot, better to cache it
newX = snap ? this.currentPage.pageX : this.x,
newY = snap ? this.currentPage.pageY : this.y,
now = utils.getTime(),
prevTime = this.keyTime || 0,
acceleration = 0.250,
pos;
if ( this.options.useTransition && this.isInTransition ) {
pos = this.getComputedPosition();
this._translate(Math.round(pos.x), Math.round(pos.y));
this.isInTransition = false;
}
this.keyAcceleration = now - prevTime < 200 ? Math.min(this.keyAcceleration + acceleration, 50) : 0;
switch ( e.keyCode ) {
case this.options.keyBindings.pageUp:
if ( this.hasHorizontalScroll && !this.hasVerticalScroll ) {
newX += snap ? 1 : this.wrapperWidth;
} else {
newY += snap ? 1 : this.wrapperHeight;
}
break;
case this.options.keyBindings.pageDown:
if ( this.hasHorizontalScroll && !this.hasVerticalScroll ) {
newX -= snap ? 1 : this.wrapperWidth;
} else {
newY -= snap ? 1 : this.wrapperHeight;
}
break;
case this.options.keyBindings.end:
newX = snap ? this.pages.length-1 : this.maxScrollX;
newY = snap ? this.pages[0].length-1 : this.maxScrollY;
break;
case this.options.keyBindings.home:
newX = 0;
newY = 0;
break;
case this.options.keyBindings.left:
newX += snap ? -1 : 5 + this.keyAcceleration>>0;
break;
case this.options.keyBindings.up:
newY += snap ? 1 : 5 + this.keyAcceleration>>0;
break;
case this.options.keyBindings.right:
newX -= snap ? -1 : 5 + this.keyAcceleration>>0;
break;
case this.options.keyBindings.down:
newY -= snap ? 1 : 5 + this.keyAcceleration>>0;
break;
default:
return;
}
if ( snap ) {
this.goToPage(newX, newY);
return;
}
if ( newX > 0 ) {
newX = 0;
this.keyAcceleration = 0;
} else if ( newX < this.maxScrollX ) {
newX = this.maxScrollX;
this.keyAcceleration = 0;
}
if ( newY > 0 ) {
newY = 0;
this.keyAcceleration = 0;
} else if ( newY < this.maxScrollY ) {
newY = this.maxScrollY;
this.keyAcceleration = 0;
}
this.scrollTo(newX, newY, 0);
this.keyTime = now;
},
_animate: function (destX, destY, duration, easingFn) {
var that = this,
startX = this.x,
startY = this.y,
startTime = utils.getTime(),
destTime = startTime + duration;
function step () {
var now = utils.getTime(),
newX, newY,
easing;
if ( now >= destTime ) {
that.isAnimating = false;
that._translate(destX, destY);
if ( !that.resetPosition(that.options.bounceTime) ) {
that._execEvent('scrollEnd');
}
return;
}
now = ( now - startTime ) / duration;
easing = easingFn(now);
newX = ( destX - startX ) * easing + startX;
newY = ( destY - startY ) * easing + startY;
that._translate(newX, newY);
if ( that.isAnimating ) {
rAF(step);
}
if ( that.options.probeType == 3 ) {
that._execEvent('scroll');
}
}
this.isAnimating = true;
step();
},
handleEvent: function (e) {
switch ( e.type ) {
case 'touchstart':
case 'MSPointerDown':
case 'mousedown':
this._start(e);
break;
case 'touchmove':
case 'MSPointerMove':
case 'mousemove':
this._move(e);
break;
case 'touchend':
case 'MSPointerUp':
case 'mouseup':
case 'touchcancel':
case 'MSPointerCancel':
case 'mousecancel':
this._end(e);
break;
case 'orientationchange':
case 'resize':
this._resize();
break;
case 'transitionend':
case 'webkitTransitionEnd':
case 'oTransitionEnd':
case 'MSTransitionEnd':
this._transitionEnd(e);
break;
case 'wheel':
case 'DOMMouseScroll':
case 'mousewheel':
this._wheel(e);
break;
case 'keydown':
this._key(e);
break;
case 'click':
if ( !e._constructed ) {
e.preventDefault();
e.stopPropagation();
}
break;
}
}
};
function createDefaultScrollbar (direction, interactive, type) {
var scrollbar = document.createElement('div'),
indicator = document.createElement('div');
if ( type === true ) {
scrollbar.style.cssText = 'position:absolute;z-index:9999';
indicator.style.cssText = '-webkit-box-sizing:border-box;-moz-box-sizing:border-box;box-sizing:border-box;position:absolute;background:rgba(0,0,0,0.5);border:1px solid rgba(255,255,255,0.9);border-radius:3px';
}
indicator.className = 'iScrollIndicator';
if ( direction == 'h' ) {
if ( type === true ) {
scrollbar.style.cssText += ';height:7px;left:2px;right:2px;bottom:0';
indicator.style.height = '100%';
}
scrollbar.className = 'iScrollHorizontalScrollbar';
} else {
if ( type === true ) {
scrollbar.style.cssText += ';width:7px;bottom:2px;top:2px;right:1px';
indicator.style.width = '100%';
}
scrollbar.className = 'iScrollVerticalScrollbar';
}
scrollbar.style.cssText += ';overflow:hidden';
if ( !interactive ) {
scrollbar.style.pointerEvents = 'none';
}
scrollbar.appendChild(indicator);
return scrollbar;
}
function Indicator (scroller, options) {
this.wrapper = typeof options.el == 'string' ? document.querySelector(options.el) : options.el;
this.wrapperStyle = this.wrapper.style;
this.indicator = this.wrapper.children[0];
this.indicatorStyle = this.indicator.style;
this.scroller = scroller;
this.options = {
listenX: true,
listenY: true,
interactive: false,
resize: true,
defaultScrollbars: false,
shrink: false,
fade: false,
speedRatioX: 0,
speedRatioY: 0
};
for ( var i in options ) {
this.options[i] = options[i];
}
this.sizeRatioX = 1;
this.sizeRatioY = 1;
this.maxPosX = 0;
this.maxPosY = 0;
if ( this.options.interactive ) {
if ( !this.options.disableTouch ) {
utils.addEvent(this.indicator, 'touchstart', this);
utils.addEvent(window, 'touchend', this);
}
if ( !this.options.disablePointer ) {
utils.addEvent(this.indicator, 'MSPointerDown', this);
utils.addEvent(window, 'MSPointerUp', this);
}
if ( !this.options.disableMouse ) {
utils.addEvent(this.indicator, 'mousedown', this);
utils.addEvent(window, 'mouseup', this);
}
}
if ( this.options.fade ) {
this.wrapperStyle[utils.style.transform] = this.scroller.translateZ;
this.wrapperStyle[utils.style.transitionDuration] = utils.isBadAndroid ? '0.001s' : '0ms';
this.wrapperStyle.opacity = '0';
}
}
Indicator.prototype = {
handleEvent: function (e) {
switch ( e.type ) {
case 'touchstart':
case 'MSPointerDown':
case 'mousedown':
this._start(e);
break;
case 'touchmove':
case 'MSPointerMove':
case 'mousemove':
this._move(e);
break;
case 'touchend':
case 'MSPointerUp':
case 'mouseup':
case 'touchcancel':
case 'MSPointerCancel':
case 'mousecancel':
this._end(e);
break;
}
},
destroy: function () {
if ( this.options.interactive ) {
utils.removeEvent(this.indicator, 'touchstart', this);
utils.removeEvent(this.indicator, 'MSPointerDown', this);
utils.removeEvent(this.indicator, 'mousedown', this);
utils.removeEvent(window, 'touchmove', this);
utils.removeEvent(window, 'MSPointerMove', this);
utils.removeEvent(window, 'mousemove', this);
utils.removeEvent(window, 'touchend', this);
utils.removeEvent(window, 'MSPointerUp', this);
utils.removeEvent(window, 'mouseup', this);
}
if ( this.options.defaultScrollbars ) {
this.wrapper.parentNode.removeChild(this.wrapper);
}
},
_start: function (e) {
var point = e.touches ? e.touches[0] : e;
e.preventDefault();
e.stopPropagation();
this.transitionTime();
this.initiated = true;
this.moved = false;
this.lastPointX = point.pageX;
this.lastPointY = point.pageY;
this.startTime = utils.getTime();
if ( !this.options.disableTouch ) {
utils.addEvent(window, 'touchmove', this);
}
if ( !this.options.disablePointer ) {
utils.addEvent(window, 'MSPointerMove', this);
}
if ( !this.options.disableMouse ) {
utils.addEvent(window, 'mousemove', this);
}
this.scroller._execEvent('beforeScrollStart');
},
_move: function (e) {
var point = e.touches ? e.touches[0] : e,
deltaX, deltaY,
newX, newY,
timestamp = utils.getTime();
if ( !this.moved ) {
this.scroller._execEvent('scrollStart');
}
this.moved = true;
deltaX = point.pageX - this.lastPointX;
this.lastPointX = point.pageX;
deltaY = point.pageY - this.lastPointY;
this.lastPointY = point.pageY;
newX = this.x + deltaX;
newY = this.y + deltaY;
this._pos(newX, newY);
if ( this.scroller.options.probeType == 1 && timestamp - this.startTime > 300 ) {
this.startTime = timestamp;
this.scroller._execEvent('scroll');
} else if ( this.scroller.options.probeType > 1 ) {
this.scroller._execEvent('scroll');
}
// INSERT POINT: indicator._move
e.preventDefault();
e.stopPropagation();
},
_end: function (e) {
if ( !this.initiated ) {
return;
}
this.initiated = false;
e.preventDefault();
e.stopPropagation();
utils.removeEvent(window, 'touchmove', this);
utils.removeEvent(window, 'MSPointerMove', this);
utils.removeEvent(window, 'mousemove', this);
if ( this.scroller.options.snap ) {
var snap = this.scroller._nearestSnap(this.scroller.x, this.scroller.y);
var time = this.options.snapSpeed || Math.max(
Math.max(
Math.min(Math.abs(this.scroller.x - snap.x), 1000),
Math.min(Math.abs(this.scroller.y - snap.y), 1000)
), 300);
if ( this.scroller.x != snap.x || this.scroller.y != snap.y ) {
this.scroller.directionX = 0;
this.scroller.directionY = 0;
this.scroller.currentPage = snap;
this.scroller.scrollTo(snap.x, snap.y, time, this.scroller.options.bounceEasing);
}
}
if ( this.moved ) {
this.scroller._execEvent('scrollEnd');
}
},
transitionTime: function (time) {
time = time || 0;
this.indicatorStyle[utils.style.transitionDuration] = time + 'ms';
if ( !time && utils.isBadAndroid ) {
this.indicatorStyle[utils.style.transitionDuration] = '0.001s';
}
},
transitionTimingFunction: function (easing) {
this.indicatorStyle[utils.style.transitionTimingFunction] = easing;
},
refresh: function () {
this.transitionTime();
if ( this.options.listenX && !this.options.listenY ) {
this.indicatorStyle.display = this.scroller.hasHorizontalScroll ? 'block' : 'none';
} else if ( this.options.listenY && !this.options.listenX ) {
this.indicatorStyle.display = this.scroller.hasVerticalScroll ? 'block' : 'none';
} else {
this.indicatorStyle.display = this.scroller.hasHorizontalScroll || this.scroller.hasVerticalScroll ? 'block' : 'none';
}
if ( this.scroller.hasHorizontalScroll && this.scroller.hasVerticalScroll ) {
utils.addClass(this.wrapper, 'iScrollBothScrollbars');
utils.removeClass(this.wrapper, 'iScrollLoneScrollbar');
if ( this.options.defaultScrollbars && this.options.customStyle ) {
if ( this.options.listenX ) {
this.wrapper.style.right = '8px';
} else {
this.wrapper.style.bottom = '8px';
}
}
} else {
utils.removeClass(this.wrapper, 'iScrollBothScrollbars');
utils.addClass(this.wrapper, 'iScrollLoneScrollbar');
if ( this.options.defaultScrollbars && this.options.customStyle ) {
if ( this.options.listenX ) {
this.wrapper.style.right = '2px';
} else {
this.wrapper.style.bottom = '2px';
}
}
}
var r = this.wrapper.offsetHeight; // force refresh
if ( this.options.listenX ) {
this.wrapperWidth = this.wrapper.clientWidth;
if ( this.options.resize ) {
this.indicatorWidth = Math.max(Math.round(this.wrapperWidth * this.wrapperWidth / (this.scroller.scrollerWidth || this.wrapperWidth || 1)), 8);
this.indicatorStyle.width = this.indicatorWidth + 'px';
} else {
this.indicatorWidth = this.indicator.clientWidth;
}
this.maxPosX = this.wrapperWidth - this.indicatorWidth;
if ( this.options.shrink == 'clip' ) {
this.minBoundaryX = -this.indicatorWidth + 8;
this.maxBoundaryX = this.wrapperWidth - 8;
} else {
this.minBoundaryX = 0;
this.maxBoundaryX = this.maxPosX;
}
this.sizeRatioX = this.options.speedRatioX || (this.scroller.maxScrollX && (this.maxPosX / this.scroller.maxScrollX));
}
if ( this.options.listenY ) {
this.wrapperHeight = this.wrapper.clientHeight;
if ( this.options.resize ) {
this.indicatorHeight = Math.max(Math.round(this.wrapperHeight * this.wrapperHeight / (this.scroller.scrollerHeight || this.wrapperHeight || 1)), 8);
this.indicatorStyle.height = this.indicatorHeight + 'px';
} else {
this.indicatorHeight = this.indicator.clientHeight;
}
this.maxPosY = this.wrapperHeight - this.indicatorHeight;
if ( this.options.shrink == 'clip' ) {
this.minBoundaryY = -this.indicatorHeight + 8;
this.maxBoundaryY = this.wrapperHeight - 8;
} else {
this.minBoundaryY = 0;
this.maxBoundaryY = this.maxPosY;
}
this.maxPosY = this.wrapperHeight - this.indicatorHeight;
this.sizeRatioY = this.options.speedRatioY || (this.scroller.maxScrollY && (this.maxPosY / this.scroller.maxScrollY));
}
this.updatePosition();
},
updatePosition: function () {
var x = this.options.listenX && Math.round(this.sizeRatioX * this.scroller.x) || 0,
y = this.options.listenY && Math.round(this.sizeRatioY * this.scroller.y) || 0;
if ( !this.options.ignoreBoundaries ) {
if ( x < this.minBoundaryX ) {
if ( this.options.shrink == 'scale' ) {
this.width = Math.max(this.indicatorWidth + x, 8);
this.indicatorStyle.width = this.width + 'px';
}
x = this.minBoundaryX;
} else if ( x > this.maxBoundaryX ) {
if ( this.options.shrink == 'scale' ) {
this.width = Math.max(this.indicatorWidth - (x - this.maxPosX), 8);
this.indicatorStyle.width = this.width + 'px';
x = this.maxPosX + this.indicatorWidth - this.width;
} else {
x = this.maxBoundaryX;
}
} else if ( this.options.shrink == 'scale' && this.width != this.indicatorWidth ) {
this.width = this.indicatorWidth;
this.indicatorStyle.width = this.width + 'px';
}
if ( y < this.minBoundaryY ) {
if ( this.options.shrink == 'scale' ) {
this.height = Math.max(this.indicatorHeight + y * 3, 8);
this.indicatorStyle.height = this.height + 'px';
}
y = this.minBoundaryY;
} else if ( y > this.maxBoundaryY ) {
if ( this.options.shrink == 'scale' ) {
this.height = Math.max(this.indicatorHeight - (y - this.maxPosY) * 3, 8);
this.indicatorStyle.height = this.height + 'px';
y = this.maxPosY + this.indicatorHeight - this.height;
} else {
y = this.maxBoundaryY;
}
} else if ( this.options.shrink == 'scale' && this.height != this.indicatorHeight ) {
this.height = this.indicatorHeight;
this.indicatorStyle.height = this.height + 'px';
}
}
this.x = x;
this.y = y;
if ( this.scroller.options.useTransform ) {
this.indicatorStyle[utils.style.transform] = 'translate(' + x + 'px,' + y + 'px)' + this.scroller.translateZ;
} else {
this.indicatorStyle.left = x + 'px';
this.indicatorStyle.top = y + 'px';
}
},
_pos: function (x, y) {
if ( x < 0 ) {
x = 0;
} else if ( x > this.maxPosX ) {
x = this.maxPosX;
}
if ( y < 0 ) {
y = 0;
} else if ( y > this.maxPosY ) {
y = this.maxPosY;
}
x = this.options.listenX ? Math.round(x / this.sizeRatioX) : this.scroller.x;
y = this.options.listenY ? Math.round(y / this.sizeRatioY) : this.scroller.y;
this.scroller.scrollTo(x, y);
},
fade: function (val, hold) {
if ( hold && !this.visible ) {
return;
}
clearTimeout(this.fadeTimeout);
this.fadeTimeout = null;
var time = val ? 250 : 500,
delay = val ? 0 : 300;
val = val ? '1' : '0';
this.wrapperStyle[utils.style.transitionDuration] = time + 'ms';
this.fadeTimeout = setTimeout((function (val) {
this.wrapperStyle.opacity = val;
this.visible = +val;
}).bind(this, val), delay);
}
};
IScroll.utils = utils;
if ( typeof module != 'undefined' && module.exports ) {
module.exports = IScroll;
} else {
window.IScroll = IScroll;
}
})(window, document, Math);
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