@qooxdoo/framework
Version:
The JS Framework for Coders
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JavaScript
/*!
* iScroll v4.2.5 ~ Copyright (c) 2012 Matteo Spinelli, http://cubiq.org
* Released under MIT license, http://cubiq.org/license
*/
(function (window, doc) {
var m = Math,
dummyStyle = doc.createElement("div").style,
vendor = (function () {
var vendors = "t,webkitT,MozT,msT,OT".split(","),
t,
i = 0,
l = vendors.length;
for (; i < l; i++) {
t = vendors[i] + "ransform";
if (t in dummyStyle) {
return vendors[i].substr(0, vendors[i].length - 1);
}
}
return false;
})(),
cssVendor = vendor ? "-" + vendor.toLowerCase() + "-" : "",
// Style properties
transform = prefixStyle("transform"),
transitionProperty = prefixStyle("transitionProperty"),
transitionDuration = prefixStyle("transitionDuration"),
transformOrigin = prefixStyle("transformOrigin"),
transitionTimingFunction = prefixStyle("transitionTimingFunction"),
transitionDelay = prefixStyle("transitionDelay"),
// Browser capabilities
isAndroid = /android/gi.test(navigator.appVersion),
isIDevice = /iphone|ipad/gi.test(navigator.appVersion),
isTouchPad = /hp-tablet/gi.test(navigator.appVersion),
has3d = prefixStyle("perspective") in dummyStyle,
hasTouch = "ontouchstart" in window && !isTouchPad,
hasTransform = vendor !== false,
hasTransitionEnd = prefixStyle("transition") in dummyStyle,
RESIZE_EV =
"onorientationchange" in window ? "orientationchange" : "resize",
START_EV = hasTouch ? "touchstart" : "mousedown",
MOVE_EV = hasTouch ? "touchmove" : "mousemove",
END_EV = hasTouch ? "touchend" : "mouseup",
CANCEL_EV = hasTouch ? "touchcancel" : "mouseup",
TRNEND_EV = (function () {
if (vendor === false) return false;
var transitionEnd = {
"": "transitionend",
webkit: "webkitTransitionEnd",
Moz: "transitionend",
O: "otransitionend",
ms: "MSTransitionEnd"
};
return transitionEnd[vendor];
})(),
nextFrame = (function () {
return (
window.requestAnimationFrame ||
window.webkitRequestAnimationFrame ||
window.mozRequestAnimationFrame ||
window.oRequestAnimationFrame ||
window.msRequestAnimationFrame ||
function (callback) {
return setTimeout(callback, 1);
}
);
})(),
cancelFrame = (function () {
return (
window.cancelRequestAnimationFrame ||
window.webkitCancelAnimationFrame ||
window.webkitCancelRequestAnimationFrame ||
window.mozCancelRequestAnimationFrame ||
window.oCancelRequestAnimationFrame ||
window.msCancelRequestAnimationFrame ||
clearTimeout
);
})(),
// Helpers
translateZ = has3d ? " translateZ(0)" : "",
// Constructor
iScroll = function (el, options) {
var that = this,
i;
that.wrapper = typeof el == "object" ? el : doc.getElementById(el);
that.wrapper.style.overflow = "hidden";
that.scroller = that.wrapper.children[0];
// Default options
that.options = {
hScroll: true,
vScroll: true,
x: 0,
y: 0,
bounce: true,
bounceLock: false,
momentum: true,
lockDirection: true,
useTransform: true,
useTransition: false,
topOffset: 0,
checkDOMChanges: false,
handleClick: true,
// Scrollbar
hScrollbar: true,
vScrollbar: true,
fixedScrollbar: isAndroid,
hideScrollbar: isIDevice,
fadeScrollbar: isIDevice && has3d,
scrollbarClass: "",
// Zoom
zoom: false,
zoomMin: 1,
zoomMax: 4,
doubleTapZoom: 2,
wheelAction: "scroll",
// Snap
snap: false,
snapThreshold: 1,
// Events
onRefresh: null,
onBeforeScrollStart(e) {
e.preventDefault();
},
onScrollStart: null,
onBeforeScrollMove: null,
onScrollMove: null,
onBeforeScrollEnd: null,
onScrollEnd: null,
onTouchEnd: null,
onDestroy: null,
onZoomStart: null,
onZoom: null,
onZoomEnd: null
};
// User defined options
for (i in options) that.options[i] = options[i];
// Set starting position
that.x = that.options.x;
that.y = that.options.y;
// Normalize options
that.options.useTransform = hasTransform && that.options.useTransform;
that.options.hScrollbar = that.options.hScroll && that.options.hScrollbar;
that.options.vScrollbar = that.options.vScroll && that.options.vScrollbar;
that.options.zoom = that.options.useTransform && that.options.zoom;
that.options.useTransition =
hasTransitionEnd && that.options.useTransition;
// Helpers FIX ANDROID BUG!
// translate3d and scale doesn't work together!
// Ignoring 3d ONLY WHEN YOU SET that.options.zoom
if (that.options.zoom && isAndroid) {
translateZ = "";
}
// Set some default styles
that.scroller.style[transitionProperty] = that.options.useTransform
? cssVendor + "transform"
: "top left";
that.scroller.style[transitionDuration] = "0";
that.scroller.style[transformOrigin] = "0 0";
if (that.options.useTransition)
that.scroller.style[transitionTimingFunction] =
"cubic-bezier(0.33,0.66,0.66,1)";
if (that.options.useTransform)
that.scroller.style[transform] =
"translate(" + that.x + "px," + that.y + "px)" + translateZ;
else
that.scroller.style.cssText +=
";position:absolute;top:" + that.y + "px;left:" + that.x + "px";
if (that.options.useTransition) that.options.fixedScrollbar = true;
that.refresh();
that._bind(RESIZE_EV, window);
that._bind(START_EV);
if (!hasTouch) {
if (that.options.wheelAction != "none") {
that._bind("DOMMouseScroll");
that._bind("mousewheel");
}
}
if (that.options.checkDOMChanges)
that.checkDOMTime = setInterval(function () {
that._checkDOMChanges();
}, 500);
};
// Prototype
iScroll.prototype = {
enabled: true,
x: 0,
y: 0,
steps: [],
scale: 1,
currPageX: 0,
currPageY: 0,
pagesX: [],
pagesY: [],
aniTime: null,
wheelZoomCount: 0,
handleEvent(e) {
var that = this;
switch (e.type) {
case START_EV:
if (!hasTouch && e.button !== 0) return;
that._start(e);
break;
case MOVE_EV:
that._move(e);
break;
case END_EV:
case CANCEL_EV:
that._end(e);
break;
case RESIZE_EV:
that._resize();
break;
case "DOMMouseScroll":
case "mousewheel":
that._wheel(e);
break;
case TRNEND_EV:
that._transitionEnd(e);
break;
}
},
_checkDOMChanges() {
if (
this.moved ||
this.zoomed ||
this.animating ||
(this.scrollerW == this.scroller.offsetWidth * this.scale &&
this.scrollerH == this.scroller.offsetHeight * this.scale)
)
return;
this.refresh();
},
_scrollbar(dir) {
var that = this,
bar;
if (!that[dir + "Scrollbar"]) {
if (that[dir + "ScrollbarWrapper"]) {
if (hasTransform)
that[dir + "ScrollbarIndicator"].style[transform] = "";
that[dir + "ScrollbarWrapper"].parentNode.removeChild(
that[dir + "ScrollbarWrapper"]
);
that[dir + "ScrollbarWrapper"] = null;
that[dir + "ScrollbarIndicator"] = null;
}
return;
}
if (!that[dir + "ScrollbarWrapper"]) {
// Create the scrollbar wrapper
bar = doc.createElement("div");
if (that.options.scrollbarClass)
bar.className = that.options.scrollbarClass + dir.toUpperCase();
else
bar.style.cssText =
"position:absolute;z-index:100;" +
(dir == "h"
? "height:7px;bottom:1px;left:2px;right:" +
(that.vScrollbar ? "7" : "2") +
"px"
: "width:7px;bottom:" +
(that.hScrollbar ? "7" : "2") +
"px;top:2px;right:1px");
bar.style.cssText +=
";pointer-events:none;" +
cssVendor +
"transition-property:opacity;" +
cssVendor +
"transition-duration:" +
(that.options.fadeScrollbar ? "350ms" : "0") +
";overflow:hidden;opacity:" +
(that.options.hideScrollbar ? "0" : "1");
that.wrapper.appendChild(bar);
that[dir + "ScrollbarWrapper"] = bar;
// Create the scrollbar indicator
bar = doc.createElement("div");
if (!that.options.scrollbarClass) {
bar.style.cssText =
"position:absolute;z-index:100;background:rgba(0,0,0,0.5);border:1px solid rgba(255,255,255,0.9);" +
cssVendor +
"background-clip:padding-box;" +
cssVendor +
"box-sizing:border-box;" +
(dir == "h" ? "height:100%" : "width:100%") +
";" +
cssVendor +
"border-radius:3px;border-radius:3px";
}
bar.style.cssText +=
";pointer-events:none;" +
cssVendor +
"transition-property:" +
cssVendor +
"transform;" +
cssVendor +
"transition-timing-function:cubic-bezier(0.33,0.66,0.66,1);" +
cssVendor +
"transition-duration:0;" +
cssVendor +
"transform: translate(0,0)" +
translateZ;
if (that.options.useTransition)
bar.style.cssText +=
";" +
cssVendor +
"transition-timing-function:cubic-bezier(0.33,0.66,0.66,1)";
that[dir + "ScrollbarWrapper"].appendChild(bar);
that[dir + "ScrollbarIndicator"] = bar;
}
if (dir == "h") {
that.hScrollbarSize = that.hScrollbarWrapper.clientWidth;
that.hScrollbarIndicatorSize = m.max(
m.round((that.hScrollbarSize * that.hScrollbarSize) / that.scrollerW),
8
);
that.hScrollbarIndicator.style.width =
that.hScrollbarIndicatorSize + "px";
that.hScrollbarMaxScroll =
that.hScrollbarSize - that.hScrollbarIndicatorSize;
that.hScrollbarProp = that.hScrollbarMaxScroll / that.maxScrollX;
} else {
that.vScrollbarSize = that.vScrollbarWrapper.clientHeight;
that.vScrollbarIndicatorSize = m.max(
m.round((that.vScrollbarSize * that.vScrollbarSize) / that.scrollerH),
8
);
that.vScrollbarIndicator.style.height =
that.vScrollbarIndicatorSize + "px";
that.vScrollbarMaxScroll =
that.vScrollbarSize - that.vScrollbarIndicatorSize;
that.vScrollbarProp = that.vScrollbarMaxScroll / that.maxScrollY;
}
// Reset position
that._scrollbarPos(dir, true);
},
_resize() {
var that = this;
setTimeout(
function () {
that.refresh();
},
isAndroid ? 200 : 0
);
},
_pos(x, y) {
if (this.zoomed) return;
x = this.hScroll ? x : 0;
y = this.vScroll ? y : 0;
if (this.options.useTransform) {
this.scroller.style[transform] =
"translate(" +
x +
"px," +
y +
"px) scale(" +
this.scale +
")" +
translateZ;
} else {
x = m.round(x);
y = m.round(y);
this.scroller.style.left = x + "px";
this.scroller.style.top = y + "px";
}
this.x = x;
this.y = y;
this._scrollbarPos("h");
this._scrollbarPos("v");
},
_scrollbarPos(dir, hidden) {
var that = this,
pos = dir == "h" ? that.x : that.y,
size;
if (!that[dir + "Scrollbar"]) return;
pos = that[dir + "ScrollbarProp"] * pos;
if (pos < 0) {
if (!that.options.fixedScrollbar) {
size = that[dir + "ScrollbarIndicatorSize"] + m.round(pos * 3);
if (size < 8) size = 8;
that[dir + "ScrollbarIndicator"].style[
dir == "h" ? "width" : "height"
] = size + "px";
}
pos = 0;
} else if (pos > that[dir + "ScrollbarMaxScroll"]) {
if (!that.options.fixedScrollbar) {
size =
that[dir + "ScrollbarIndicatorSize"] -
m.round((pos - that[dir + "ScrollbarMaxScroll"]) * 3);
if (size < 8) size = 8;
that[dir + "ScrollbarIndicator"].style[
dir == "h" ? "width" : "height"
] = size + "px";
pos =
that[dir + "ScrollbarMaxScroll"] +
(that[dir + "ScrollbarIndicatorSize"] - size);
} else {
pos = that[dir + "ScrollbarMaxScroll"];
}
}
that[dir + "ScrollbarWrapper"].style[transitionDelay] = "0";
that[dir + "ScrollbarWrapper"].style.opacity =
hidden && that.options.hideScrollbar ? "0" : "1";
that[dir + "ScrollbarIndicator"].style[transform] =
"translate(" +
(dir == "h" ? pos + "px,0)" : "0," + pos + "px)") +
translateZ;
},
_start(e) {
var that = this,
point = hasTouch ? e.touches[0] : e,
matrix,
x,
y,
c1,
c2;
if (!that.enabled) return;
if (that.options.onBeforeScrollStart)
that.options.onBeforeScrollStart.call(that, e);
if (that.options.useTransition || that.options.zoom)
that._transitionTime(0);
that.moved = false;
that.animating = false;
that.zoomed = false;
that.distX = 0;
that.distY = 0;
that.absDistX = 0;
that.absDistY = 0;
that.dirX = 0;
that.dirY = 0;
// Gesture start
if (that.options.zoom && hasTouch && e.touches.length > 1) {
c1 = m.abs(e.touches[0].pageX - e.touches[1].pageX);
c2 = m.abs(e.touches[0].pageY - e.touches[1].pageY);
that.touchesDistStart = m.sqrt(c1 * c1 + c2 * c2);
that.originX =
m.abs(
e.touches[0].pageX + e.touches[1].pageX - that.wrapperOffsetLeft * 2
) /
2 -
that.x;
that.originY =
m.abs(
e.touches[0].pageY + e.touches[1].pageY - that.wrapperOffsetTop * 2
) /
2 -
that.y;
if (that.options.onZoomStart) that.options.onZoomStart.call(that, e);
}
if (that.options.momentum) {
if (that.options.useTransform) {
// Very lame general purpose alternative to CSSMatrix
matrix = getComputedStyle(that.scroller, null)
[transform].replace(/[^0-9\-.,]/g, "")
.split(",");
x = +(matrix[12] || matrix[4]);
y = +(matrix[13] || matrix[5]);
} else {
x = +getComputedStyle(that.scroller, null).left.replace(
/[^0-9-]/g,
""
);
y = +getComputedStyle(that.scroller, null).top.replace(
/[^0-9-]/g,
""
);
}
if (x != that.x || y != that.y) {
if (that.options.useTransition) that._unbind(TRNEND_EV);
else cancelFrame(that.aniTime);
that.steps = [];
that._pos(x, y);
if (that.options.onScrollEnd) that.options.onScrollEnd.call(that);
}
}
that.absStartX = that.x; // Needed by snap threshold
that.absStartY = that.y;
that.startX = that.x;
that.startY = that.y;
that.pointX = point.pageX;
that.pointY = point.pageY;
that.startTime = e.timeStamp || Date.now();
if (that.options.onScrollStart) that.options.onScrollStart.call(that, e);
that._bind(MOVE_EV, window);
that._bind(END_EV, window);
that._bind(CANCEL_EV, window);
},
_move(e) {
var that = this,
point = hasTouch ? e.touches[0] : e,
deltaX = point.pageX - that.pointX,
deltaY = point.pageY - that.pointY,
newX = that.x + deltaX,
newY = that.y + deltaY,
c1,
c2,
scale,
timestamp = e.timeStamp || Date.now();
if (that.options.onBeforeScrollMove)
that.options.onBeforeScrollMove.call(that, e);
// Zoom
if (that.options.zoom && hasTouch && e.touches.length > 1) {
c1 = m.abs(e.touches[0].pageX - e.touches[1].pageX);
c2 = m.abs(e.touches[0].pageY - e.touches[1].pageY);
that.touchesDist = m.sqrt(c1 * c1 + c2 * c2);
that.zoomed = true;
scale = (1 / that.touchesDistStart) * that.touchesDist * this.scale;
if (scale < that.options.zoomMin)
scale =
0.5 *
that.options.zoomMin *
Math.pow(2.0, scale / that.options.zoomMin);
else if (scale > that.options.zoomMax)
scale =
2.0 *
that.options.zoomMax *
Math.pow(0.5, that.options.zoomMax / scale);
that.lastScale = scale / this.scale;
newX = this.originX - this.originX * that.lastScale + this.x;
newY = this.originY - this.originY * that.lastScale + this.y;
this.scroller.style[transform] =
"translate(" +
newX +
"px," +
newY +
"px) scale(" +
scale +
")" +
translateZ;
if (that.options.onZoom) that.options.onZoom.call(that, e);
return;
}
that.pointX = point.pageX;
that.pointY = point.pageY;
// Slow down if outside of the boundaries
if (newX > 0 || newX < that.maxScrollX) {
newX = that.options.bounce
? that.x + deltaX / 2
: newX >= 0 || that.maxScrollX >= 0
? 0
: that.maxScrollX;
}
if (newY > that.minScrollY || newY < that.maxScrollY) {
newY = that.options.bounce
? that.y + deltaY / 2
: newY >= that.minScrollY || that.maxScrollY >= 0
? that.minScrollY
: that.maxScrollY;
}
that.distX += deltaX;
that.distY += deltaY;
that.absDistX = m.abs(that.distX);
that.absDistY = m.abs(that.distY);
if (that.absDistX < 6 && that.absDistY < 6) {
return;
}
// Lock direction
if (that.options.lockDirection) {
if (that.absDistX > that.absDistY + 5) {
newY = that.y;
deltaY = 0;
} else if (that.absDistY > that.absDistX + 5) {
newX = that.x;
deltaX = 0;
}
}
that.moved = true;
that._pos(newX, newY);
that.dirX = deltaX > 0 ? -1 : deltaX < 0 ? 1 : 0;
that.dirY = deltaY > 0 ? -1 : deltaY < 0 ? 1 : 0;
if (timestamp - that.startTime > 300) {
that.startTime = timestamp;
that.startX = that.x;
that.startY = that.y;
}
if (that.options.onScrollMove) that.options.onScrollMove.call(that, e);
},
_end(e) {
if (hasTouch && e.touches.length !== 0) return;
var that = this,
point = hasTouch ? e.changedTouches[0] : e,
target,
ev,
momentumX = { dist: 0, time: 0 },
momentumY = { dist: 0, time: 0 },
duration = (e.timeStamp || Date.now()) - that.startTime,
newPosX = that.x,
newPosY = that.y,
distX,
distY,
newDuration,
snap,
scale;
that._unbind(MOVE_EV, window);
that._unbind(END_EV, window);
that._unbind(CANCEL_EV, window);
if (that.options.onBeforeScrollEnd)
that.options.onBeforeScrollEnd.call(that, e);
if (that.zoomed) {
scale = that.scale * that.lastScale;
scale = Math.max(that.options.zoomMin, scale);
scale = Math.min(that.options.zoomMax, scale);
that.lastScale = scale / that.scale;
that.scale = scale;
that.x = that.originX - that.originX * that.lastScale + that.x;
that.y = that.originY - that.originY * that.lastScale + that.y;
that.scroller.style[transitionDuration] = "200ms";
that.scroller.style[transform] =
"translate(" +
that.x +
"px," +
that.y +
"px) scale(" +
that.scale +
")" +
translateZ;
that.zoomed = false;
that.refresh();
if (that.options.onZoomEnd) that.options.onZoomEnd.call(that, e);
return;
}
if (!that.moved) {
if (hasTouch) {
if (that.doubleTapTimer && that.options.zoom) {
// Double tapped
clearTimeout(that.doubleTapTimer);
that.doubleTapTimer = null;
if (that.options.onZoomStart)
that.options.onZoomStart.call(that, e);
that.zoom(
that.pointX,
that.pointY,
that.scale == 1 ? that.options.doubleTapZoom : 1
);
if (that.options.onZoomEnd) {
setTimeout(function () {
that.options.onZoomEnd.call(that, e);
}, 200); // 200 is default zoom duration
}
} else if (this.options.handleClick) {
that.doubleTapTimer = setTimeout(
function () {
that.doubleTapTimer = null;
// Find the last touched element
target = point.target;
while (target.nodeType != 1) target = target.parentNode;
if (
target.tagName != "SELECT" &&
target.tagName != "INPUT" &&
target.tagName != "TEXTAREA"
) {
ev = doc.createEvent("MouseEvents");
ev.initMouseEvent(
"click",
true,
true,
e.view,
1,
point.screenX,
point.screenY,
point.clientX,
point.clientY,
e.ctrlKey,
e.altKey,
e.shiftKey,
e.metaKey,
0,
null
);
ev._fake = true;
target.dispatchEvent(ev);
}
},
that.options.zoom ? 250 : 0
);
}
}
that._resetPos(400);
if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);
return;
}
if (duration < 300 && that.options.momentum) {
momentumX = newPosX
? that._momentum(
newPosX - that.startX,
duration,
-that.x,
that.scrollerW - that.wrapperW + that.x,
that.options.bounce ? that.wrapperW : 0
)
: momentumX;
momentumY = newPosY
? that._momentum(
newPosY - that.startY,
duration,
-that.y,
that.maxScrollY < 0
? that.scrollerH - that.wrapperH + that.y - that.minScrollY
: 0,
that.options.bounce ? that.wrapperH : 0
)
: momentumY;
newPosX = that.x + momentumX.dist;
newPosY = that.y + momentumY.dist;
if (
(that.x > 0 && newPosX > 0) ||
(that.x < that.maxScrollX && newPosX < that.maxScrollX)
)
momentumX = { dist: 0, time: 0 };
if (
(that.y > that.minScrollY && newPosY > that.minScrollY) ||
(that.y < that.maxScrollY && newPosY < that.maxScrollY)
)
momentumY = { dist: 0, time: 0 };
}
if (momentumX.dist || momentumY.dist) {
newDuration = m.max(m.max(momentumX.time, momentumY.time), 10);
// Do we need to snap?
if (that.options.snap) {
distX = newPosX - that.absStartX;
distY = newPosY - that.absStartY;
if (
m.abs(distX) < that.options.snapThreshold &&
m.abs(distY) < that.options.snapThreshold
) {
that.scrollTo(that.absStartX, that.absStartY, 200);
} else {
snap = that._snap(newPosX, newPosY);
newPosX = snap.x;
newPosY = snap.y;
newDuration = m.max(snap.time, newDuration);
}
}
that.scrollTo(m.round(newPosX), m.round(newPosY), newDuration);
if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);
return;
}
// Do we need to snap?
if (that.options.snap) {
distX = newPosX - that.absStartX;
distY = newPosY - that.absStartY;
if (
m.abs(distX) < that.options.snapThreshold &&
m.abs(distY) < that.options.snapThreshold
)
that.scrollTo(that.absStartX, that.absStartY, 200);
else {
snap = that._snap(that.x, that.y);
if (snap.x != that.x || snap.y != that.y)
that.scrollTo(snap.x, snap.y, snap.time);
}
if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);
return;
}
that._resetPos(200);
if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);
},
_resetPos(time) {
var that = this,
resetX =
that.x >= 0 ? 0 : that.x < that.maxScrollX ? that.maxScrollX : that.x,
resetY =
that.y >= that.minScrollY || that.maxScrollY > 0
? that.minScrollY
: that.y < that.maxScrollY
? that.maxScrollY
: that.y;
if (resetX == that.x && resetY == that.y) {
if (that.moved) {
that.moved = false;
if (that.options.onScrollEnd) that.options.onScrollEnd.call(that); // Execute custom code on scroll end
}
if (that.hScrollbar && that.options.hideScrollbar) {
if (vendor == "webkit")
that.hScrollbarWrapper.style[transitionDelay] = "300ms";
that.hScrollbarWrapper.style.opacity = "0";
}
if (that.vScrollbar && that.options.hideScrollbar) {
if (vendor == "webkit")
that.vScrollbarWrapper.style[transitionDelay] = "300ms";
that.vScrollbarWrapper.style.opacity = "0";
}
return;
}
that.scrollTo(resetX, resetY, time || 0);
},
_wheel(e) {
var that = this,
wheelDeltaX,
wheelDeltaY,
deltaX,
deltaY,
deltaScale;
if ("wheelDeltaX" in e) {
wheelDeltaX = e.wheelDeltaX / 12;
wheelDeltaY = e.wheelDeltaY / 12;
} else if ("wheelDelta" in e) {
wheelDeltaX = wheelDeltaY = e.wheelDelta / 12;
} else if ("detail" in e) {
wheelDeltaX = wheelDeltaY = -e.detail * 3;
} else {
return;
}
if (that.options.wheelAction == "zoom") {
deltaScale =
that.scale *
Math.pow(
2,
(1 / 3) * (wheelDeltaY ? wheelDeltaY / Math.abs(wheelDeltaY) : 0)
);
if (deltaScale < that.options.zoomMin)
deltaScale = that.options.zoomMin;
if (deltaScale > that.options.zoomMax)
deltaScale = that.options.zoomMax;
if (deltaScale != that.scale) {
if (!that.wheelZoomCount && that.options.onZoomStart)
that.options.onZoomStart.call(that, e);
that.wheelZoomCount++;
that.zoom(e.pageX, e.pageY, deltaScale, 400);
setTimeout(function () {
that.wheelZoomCount--;
if (!that.wheelZoomCount && that.options.onZoomEnd)
that.options.onZoomEnd.call(that, e);
}, 400);
}
return;
}
deltaX = that.x + wheelDeltaX;
deltaY = that.y + wheelDeltaY;
if (deltaX > 0) deltaX = 0;
else if (deltaX < that.maxScrollX) deltaX = that.maxScrollX;
if (deltaY > that.minScrollY) deltaY = that.minScrollY;
else if (deltaY < that.maxScrollY) deltaY = that.maxScrollY;
if (that.maxScrollY < 0) {
that.scrollTo(deltaX, deltaY, 0);
}
},
_transitionEnd(e) {
var that = this;
if (e.target != that.scroller) return;
that._unbind(TRNEND_EV);
that._startAni();
},
/**
*
* Utilities
*
*/
_startAni() {
var that = this,
startX = that.x,
startY = that.y,
startTime = Date.now(),
step,
easeOut,
animate;
if (that.animating) return;
if (!that.steps.length) {
that._resetPos(400);
return;
}
step = that.steps.shift();
if (step.x == startX && step.y == startY) step.time = 0;
that.animating = true;
that.moved = true;
if (that.options.useTransition) {
that._transitionTime(step.time);
that._pos(step.x, step.y);
that.animating = false;
if (step.time) that._bind(TRNEND_EV);
else that._resetPos(0);
return;
}
animate = function () {
var now = Date.now(),
newX,
newY;
if (now >= startTime + step.time) {
that._pos(step.x, step.y);
that.animating = false;
if (that.options.onAnimationEnd)
that.options.onAnimationEnd.call(that); // Execute custom code on animation end
that._startAni();
return;
}
now = (now - startTime) / step.time - 1;
easeOut = m.sqrt(1 - now * now);
newX = (step.x - startX) * easeOut + startX;
newY = (step.y - startY) * easeOut + startY;
that._pos(newX, newY);
if (that.animating) that.aniTime = nextFrame(animate);
};
animate();
},
_transitionTime(time) {
time += "ms";
this.scroller.style[transitionDuration] = time;
if (this.hScrollbar)
this.hScrollbarIndicator.style[transitionDuration] = time;
if (this.vScrollbar)
this.vScrollbarIndicator.style[transitionDuration] = time;
},
_momentum(dist, time, maxDistUpper, maxDistLower, size) {
var deceleration = 0.0006,
speed = m.abs(dist) / time,
newDist = (speed * speed) / (2 * deceleration),
newTime = 0,
outsideDist = 0;
// Proportinally reduce speed if we are outside of the boundaries
if (dist > 0 && newDist > maxDistUpper) {
outsideDist = size / (6 / ((newDist / speed) * deceleration));
maxDistUpper = maxDistUpper + outsideDist;
speed = (speed * maxDistUpper) / newDist;
newDist = maxDistUpper;
} else if (dist < 0 && newDist > maxDistLower) {
outsideDist = size / (6 / ((newDist / speed) * deceleration));
maxDistLower = maxDistLower + outsideDist;
speed = (speed * maxDistLower) / newDist;
newDist = maxDistLower;
}
newDist = newDist * (dist < 0 ? -1 : 1);
newTime = speed / deceleration;
return { dist: newDist, time: m.round(newTime) };
},
_offset(el) {
var left = -el.offsetLeft,
top = -el.offsetTop;
while ((el = el.offsetParent)) {
left -= el.offsetLeft;
top -= el.offsetTop;
}
if (el != this.wrapper) {
left *= this.scale;
top *= this.scale;
}
return { left: left, top: top };
},
_snap(x, y) {
var that = this,
i,
l,
page,
time,
sizeX,
sizeY;
// Check page X
page = that.pagesX.length - 1;
for (i = 0, l = that.pagesX.length; i < l; i++) {
if (x >= that.pagesX[i]) {
page = i;
break;
}
}
if (page == that.currPageX && page > 0 && that.dirX < 0) page--;
x = that.pagesX[page];
sizeX = m.abs(x - that.pagesX[that.currPageX]);
sizeX = sizeX ? (m.abs(that.x - x) / sizeX) * 500 : 0;
that.currPageX = page;
// Check page Y
page = that.pagesY.length - 1;
for (i = 0; i < page; i++) {
if (y >= that.pagesY[i]) {
page = i;
break;
}
}
if (page == that.currPageY && page > 0 && that.dirY < 0) page--;
y = that.pagesY[page];
sizeY = m.abs(y - that.pagesY[that.currPageY]);
sizeY = sizeY ? (m.abs(that.y - y) / sizeY) * 500 : 0;
that.currPageY = page;
// Snap with constant speed (proportional duration)
time = m.round(m.max(sizeX, sizeY)) || 200;
return { x: x, y: y, time: time };
},
_bind(type, el, bubble) {
(el || this.scroller).addEventListener(type, this, !!bubble);
},
_unbind(type, el, bubble) {
(el || this.scroller).removeEventListener(type, this, !!bubble);
},
/**
*
* Public methods
*
*/
destroy() {
var that = this;
that.scroller.style[transform] = "";
// Remove the scrollbars
that.hScrollbar = false;
that.vScrollbar = false;
that._scrollbar("h");
that._scrollbar("v");
// Remove the event listeners
that._unbind(RESIZE_EV, window);
that._unbind(START_EV);
that._unbind(MOVE_EV, window);
that._unbind(END_EV, window);
that._unbind(CANCEL_EV, window);
if (!that.options.hasTouch) {
that._unbind("DOMMouseScroll");
that._unbind("mousewheel");
}
if (that.options.useTransition) that._unbind(TRNEND_EV);
if (that.options.checkDOMChanges) clearInterval(that.checkDOMTime);
if (that.options.onDestroy) that.options.onDestroy.call(that);
},
refresh() {
var that = this,
offset,
i,
l,
els,
pos = 0,
page = 0;
if (that.scale < that.options.zoomMin) that.scale = that.options.zoomMin;
that.wrapperW = that.wrapper.clientWidth || 1;
that.wrapperH = that.wrapper.clientHeight || 1;
that.minScrollY = -that.options.topOffset || 0;
that.scrollerW = m.round(that.scroller.offsetWidth * that.scale);
that.scrollerH = m.round(
(that.scroller.offsetHeight + that.minScrollY) * that.scale
);
that.maxScrollX = that.wrapperW - that.scrollerW;
that.maxScrollY = that.wrapperH - that.scrollerH + that.minScrollY;
that.dirX = 0;
that.dirY = 0;
if (that.options.onRefresh) that.options.onRefresh.call(that);
that.hScroll = that.options.hScroll && that.maxScrollX < 0;
that.vScroll =
that.options.vScroll &&
((!that.options.bounceLock && !that.hScroll) ||
that.scrollerH > that.wrapperH);
that.hScrollbar = that.hScroll && that.options.hScrollbar;
that.vScrollbar =
that.vScroll &&
that.options.vScrollbar &&
that.scrollerH > that.wrapperH;
offset = that._offset(that.wrapper);
that.wrapperOffsetLeft = -offset.left;
that.wrapperOffsetTop = -offset.top;
// Prepare snap
if (typeof that.options.snap == "string") {
that.pagesX = [];
that.pagesY = [];
els = that.scroller.querySelectorAll(that.options.snap);
for (i = 0, l = els.length; i < l; i++) {
pos = that._offset(els[i]);
pos.left += that.wrapperOffsetLeft;
pos.top += that.wrapperOffsetTop;
that.pagesX[i] =
pos.left < that.maxScrollX
? that.maxScrollX
: pos.left * that.scale;
that.pagesY[i] =
pos.top < that.maxScrollY ? that.maxScrollY : pos.top * that.scale;
}
} else if (that.options.snap) {
that.pagesX = [];
while (pos >= that.maxScrollX) {
that.pagesX[page] = pos;
pos = pos - that.wrapperW;
page++;
}
if (that.maxScrollX % that.wrapperW)
that.pagesX[that.pagesX.length] =
that.maxScrollX -
that.pagesX[that.pagesX.length - 1] +
that.pagesX[that.pagesX.length - 1];
pos = 0;
page = 0;
that.pagesY = [];
while (pos >= that.maxScrollY) {
that.pagesY[page] = pos;
pos = pos - that.wrapperH;
page++;
}
if (that.maxScrollY % that.wrapperH)
that.pagesY[that.pagesY.length] =
that.maxScrollY -
that.pagesY[that.pagesY.length - 1] +
that.pagesY[that.pagesY.length - 1];
}
// Prepare the scrollbars
that._scrollbar("h");
that._scrollbar("v");
if (!that.zoomed) {
that.scroller.style[transitionDuration] = "0";
that._resetPos(400);
}
},
scrollTo(x, y, time, relative) {
var that = this,
step = x,
i,
l;
that.stop();
if (!step.length) step = [{ x: x, y: y, time: time, relative: relative }];
for (i = 0, l = step.length; i < l; i++) {
if (step[i].relative) {
step[i].x = that.x - step[i].x;
step[i].y = that.y - step[i].y;
}
that.steps.push({
x: step[i].x,
y: step[i].y,
time: step[i].time || 0
});
}
that._startAni();
},
scrollToElement(el, time) {
var that = this,
pos;
el = el.nodeType ? el : that.scroller.querySelector(el);
if (!el) return;
pos = that._offset(el);
pos.left += that.wrapperOffsetLeft;
pos.top += that.wrapperOffsetTop;
pos.left =
pos.left > 0
? 0
: pos.left < that.maxScrollX
? that.maxScrollX
: pos.left;
pos.top =
pos.top > that.minScrollY
? that.minScrollY
: pos.top < that.maxScrollY
? that.maxScrollY
: pos.top;
time =
time === undefined
? m.max(m.abs(pos.left) * 2, m.abs(pos.top) * 2)
: time;
that.scrollTo(pos.left, pos.top, time);
},
scrollToPage(pageX, pageY, time) {
var that = this,
x,
y;
time = time === undefined ? 400 : time;
if (that.options.onScrollStart) that.options.onScrollStart.call(that);
if (that.options.snap) {
pageX =
pageX == "next"
? that.currPageX + 1
: pageX == "prev"
? that.currPageX - 1
: pageX;
pageY =
pageY == "next"
? that.currPageY + 1
: pageY == "prev"
? that.currPageY - 1
: pageY;
pageX =
pageX < 0
? 0
: pageX > that.pagesX.length - 1
? that.pagesX.length - 1
: pageX;
pageY =
pageY < 0
? 0
: pageY > that.pagesY.length - 1
? that.pagesY.length - 1
: pageY;
that.currPageX = pageX;
that.currPageY = pageY;
x = that.pagesX[pageX];
y = that.pagesY[pageY];
} else {
x = -that.wrapperW * pageX;
y = -that.wrapperH * pageY;
if (x < that.maxScrollX) x = that.maxScrollX;
if (y < that.maxScrollY) y = that.maxScrollY;
}
that.scrollTo(x, y, time);
},
disable() {
this.stop();
this._resetPos(0);
this.enabled = false;
// If disabled after touchstart we make sure that there are no left over events
this._unbind(MOVE_EV, window);
this._unbind(END_EV, window);
this._unbind(CANCEL_EV, window);
},
enable() {
this.enabled = true;
},
stop() {
if (this.options.useTransition) this._unbind(TRNEND_EV);
else cancelFrame(this.aniTime);
this.steps = [];
this.moved = false;
this.animating = false;
},
zoom(x, y, scale, time) {
var that = this,
relScale = scale / that.scale;
if (!that.options.useTransform) return;
that.zoomed = true;
time = time === undefined ? 200 : time;
x = x - that.wrapperOffsetLeft - that.x;
y = y - that.wrapperOffsetTop - that.y;
that.x = x - x * relScale + that.x;
that.y = y - y * relScale + that.y;
that.scale = scale;
that.refresh();
that.x =
that.x > 0 ? 0 : that.x < that.maxScrollX ? that.maxScrollX : that.x;
that.y =
that.y > that.minScrollY
? that.minScrollY
: that.y < that.maxScrollY
? that.maxScrollY
: that.y;
that.scroller.style[transitionDuration] = time + "ms";
that.scroller.style[transform] =
"translate(" +
that.x +
"px," +
that.y +
"px) scale(" +
scale +
")" +
translateZ;
that.zoomed = false;
},
isReady() {
return !this.moved && !this.zoomed && !this.animating;
}
};
function prefixStyle(style) {
if (vendor === "") return style;
style = style.charAt(0).toUpperCase() + style.substr(1);
return vendor + style;
}
dummyStyle = null; // for the sake of it
if (typeof exports !== "undefined") exports.iScroll = iScroll;
else window.iScroll = iScroll;
})(window, document);