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- (function(){
- var m = Math,
- mround = function (r) { return r >> 0; },
- vendor = (/webkit/i).test(navigator.appVersion) ? 'webkit' :
- (/firefox/i).test(navigator.userAgent) ? 'Moz' :
- 'opera' in window ? 'O' : '',
-
- isAndroid = (/android/gi).test(navigator.appVersion),
- isIDevice = (/iphone|ipad/gi).test(navigator.appVersion),
- isPlaybook = (/playbook/gi).test(navigator.appVersion),
- isTouchPad = (/hp-tablet/gi).test(navigator.appVersion),
- has3d = 'WebKitCSSMatrix' in window && 'm11' in new WebKitCSSMatrix(),
- hasTouch = 'ontouchstart' in window && !isTouchPad,
- hasTransform = vendor + 'Transform' in document.documentElement.style,
- hasTransitionEnd = isIDevice || isPlaybook,
- nextFrame = (function() {
- return window.requestAnimationFrame
- || window.webkitRequestAnimationFrame
- || window.mozRequestAnimationFrame
- || window.oRequestAnimationFrame
- || window.msRequestAnimationFrame
- || function(callback) { return setTimeout(callback, 17); }
- })(),
- cancelFrame = (function () {
- return window.cancelRequestAnimationFrame
- || window.webkitCancelAnimationFrame
- || window.webkitCancelRequestAnimationFrame
- || window.mozCancelRequestAnimationFrame
- || window.oCancelRequestAnimationFrame
- || window.msCancelRequestAnimationFrame
- || clearTimeout
- })(),
-
- 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',
-
- trnOpen = 'translate' + (has3d ? '3d(' : '('),
- trnClose = has3d ? ',0)' : ')',
-
- iScroll = function (el, options) {
- var that = this,
- doc = document,
- i;
- that.wrapper = typeof el == 'object' ? el : doc.getElementById(el);
- that.wrapper.style.overflow = 'hidden';
- that.scroller = that.wrapper.children[0];
-
- that.options = {
- hScroll: true,
- vScroll: true,
- x: 0,
- y: 0,
- bounce: true,
- bounceLock: false,
- momentum: true,
- lockDirection: true,
- useTransform: true,
- useTransition: false,
-
- onRefresh: null,
- onBeforeScrollStart: function (e) { e.preventDefault(); },
- onScrollStart: null,
- onBeforeScrollMove: null,
- onScrollMove: null,
- onBeforeScrollEnd: null,
- onScrollEnd: null,
- onTouchEnd: null,
- onDestroy: null
- };
-
- for (i in options) that.options[i] = options[i];
-
- that.x = that.options.x;
- that.y = that.options.y;
-
- that.options.useTransform = hasTransform ? that.options.useTransform : false;
- that.options.hScrollbar = that.options.hScroll && that.options.hScrollbar;
- that.options.vScrollbar = that.options.vScroll && that.options.vScrollbar;
- that.options.useTransition = hasTransitionEnd && that.options.useTransition;
-
- that.scroller.style[vendor + 'TransitionProperty'] = that.options.useTransform ? '-' + vendor.toLowerCase() + '-transform' : 'top left';
- that.scroller.style[vendor + 'TransitionDuration'] = '0';
- that.scroller.style[vendor + 'TransformOrigin'] = '0 0';
- if (that.options.useTransition) that.scroller.style[vendor + 'TransitionTimingFunction'] = 'cubic-bezier(0.33,0.66,0.66,1)';
-
- if (that.options.useTransform) that.scroller.style[vendor + 'Transform'] = trnOpen + that.x + 'px,' + that.y + 'px' + trnClose;
- else that.scroller.style.cssText += ';position:absolute;top:' + that.y + 'px;left:' + that.x + 'px';
- that.refresh();
- that._bind(RESIZE_EV, window);
- that._bind(START_EV);
- if (!hasTouch) that._bind('mouseout', that.wrapper);
- };
- iScroll.prototype = {
- enabled: true,
- x: 0,
- y: 0,
- steps: [],
- scale: 1,
-
- handleEvent: function (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 'mouseout': that._mouseout(e); break;
- case 'webkitTransitionEnd': that._transitionEnd(e); break;
- }
- },
- _resize: function () {
- this.refresh();
- },
-
- _pos: function (x, y) {
- x = this.hScroll ? x : 0;
- y = this.vScroll ? y : 0;
- if (this.options.useTransform) {
- this.scroller.style[vendor + 'Transform'] = trnOpen + x + 'px,' + y + 'px' + trnClose + ' scale(' + this.scale + ')';
- } else {
- x = mround(x);
- y = mround(y);
- this.scroller.style.left = x + 'px';
- this.scroller.style.top = y + 'px';
- }
- this.x = x;
- this.y = y;
- },
- _start: function (e) {
- var that = this,
- point = hasTouch ? e.touches[0] : e,
- matrix, x, y;
- if (!that.enabled) return;
- if (that.options.onBeforeScrollStart) that.options.onBeforeScrollStart.call(that, e);
-
- if (that.options.useTransition) 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;
- if (that.options.momentum) {
- if (that.options.useTransform) {
-
- matrix = getComputedStyle(that.scroller, null)[vendor + 'Transform'].replace(/[^0-9-.,]/g, '').split(',');
- x = matrix[4] * 1;
- y = matrix[5] * 1;
- } else {
- x = getComputedStyle(that.scroller, null).left.replace(/[^0-9-]/g, '') * 1;
- y = getComputedStyle(that.scroller, null).top.replace(/[^0-9-]/g, '') * 1;
- }
-
- if (x != that.x || y != that.y) {
- if (that.options.useTransition) that._unbind('webkitTransitionEnd');
- else cancelFrame(that.aniTime);
- that.steps = [];
- that._pos(x, 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);
- that._bind(END_EV);
- that._bind(CANCEL_EV);
- },
-
- _move: function (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,
- timestamp = e.timeStamp || Date.now();
- if (that.options.onBeforeScrollMove) that.options.onBeforeScrollMove.call(that, e);
- that.pointX = point.pageX;
- that.pointY = point.pageY;
-
- if (newX > 0 || newX < that.maxScrollX) {
- newX = that.options.bounce ? that.x + (deltaX / 2) : newX >= 0 || that.maxScrollX >= 0 ? 0 : that.maxScrollX;
- }
- if (newY > 0 || newY < that.maxScrollY) {
- newY = that.options.bounce ? that.y + (deltaY / 2) : newY >= 0 || that.maxScrollY >= 0 ? 0 : 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;
- }
-
- 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: function (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,
- newDuration;
- that._unbind(MOVE_EV);
- that._unbind(END_EV);
- that._unbind(CANCEL_EV);
- if (that.options.onBeforeScrollEnd) that.options.onBeforeScrollEnd.call(that, e);
- if (!that.moved) {
- if (hasTouch) {
-
- target = point.target;
- while (target.nodeType != 1) target = target.parentNode;
- if (target.tagName != 'SELECT' && target.tagName != 'INPUT' && target.tagName != 'TEXTAREA') {
- ev = document.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._resetPos(200);
- 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 : 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 > 0 && newPosY > 0) || (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);
- that.scrollTo(mround(newPosX), mround(newPosY), newDuration);
- 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: function (time) {
- var that = this,
- resetX = that.x >= 0 ? 0 : that.x < that.maxScrollX ? that.maxScrollX : that.x,
- resetY = that.y >= 0 || that.maxScrollY > 0 ? 0 : that.y < that.maxScrollY ? that.maxScrollY : that.y;
- if (resetX == that.x && resetY == that.y) {
- if (that.moved) {
- if (that.options.onScrollEnd) that.options.onScrollEnd.call(that);
- that.moved = false;
- }
- return;
- }
- that.scrollTo(resetX, resetY, time || 0);
- },
-
- _mouseout: function (e) {
- var t = e.relatedTarget;
- if (!t) {
- this._end(e);
- return;
- }
- while (t = t.parentNode) if (t == this.wrapper) return;
-
- this._end(e);
- },
- _transitionEnd: function (e) {
- var that = this;
- if (e.target != that.scroller) return;
- that._unbind('webkitTransitionEnd');
-
- that._startAni();
- },
-
- _startAni: function () {
- 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('webkitTransitionEnd');
- 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);
- 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: function (time) {
- this.scroller.style[vendor + 'TransitionDuration'] = time + 'ms';
- },
-
- _momentum: function (dist, time, maxDistUpper, maxDistLower, size) {
- var deceleration = 0.0006,
- speed = m.abs(dist) / time,
- newDist = (speed * speed) / (2 * deceleration),
- newTime = 0, outsideDist = 0;
-
- 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: mround(newTime) };
- },
- _offset: function (el) {
- var left = -el.offsetLeft,
- top = -el.offsetTop;
-
- while (el = el.offsetParent) {
- left -= el.offsetLeft;
- top -= el.offsetTop;
- }
- return { left: left, top: top };
- },
- _bind: function (type, el, bubble) {
- (el || this.scroller).addEventListener(type, this, !!bubble);
- },
- _unbind: function (type, el, bubble) {
- (el || this.scroller).removeEventListener(type, this, !!bubble);
- },
-
- destroy: function () {
- var that = this;
- that.scroller.style[vendor + 'Transform'] = '';
-
- that._unbind(RESIZE_EV, window);
- that._unbind(START_EV);
- that._unbind(MOVE_EV);
- that._unbind(END_EV);
- that._unbind(CANCEL_EV);
- that._unbind('mouseout', that.wrapper);
- if (that.options.useTransition) that._unbind('webkitTransitionEnd');
-
- if (that.options.onDestroy) that.options.onDestroy.call(that);
- },
- refresh: function () {
- var that = this,
- offset;
- that.wrapperW = that.wrapper.clientWidth;
- that.wrapperH = that.wrapper.clientHeight;
- that.scrollerW = that.scroller.offsetWidth;
- that.scrollerH = that.scroller.offsetHeight;
- that.maxScrollX = that.wrapperW - that.scrollerW;
- that.maxScrollY = that.wrapperH - that.scrollerH;
- that.dirX = 0;
- that.dirY = 0;
- that.hScroll = that.options.hScroll && that.maxScrollX < 0;
- that.vScroll = that.options.vScroll && (!that.options.bounceLock && !that.hScroll || that.scrollerH > that.wrapperH);
- offset = that._offset(that.wrapper);
- that.wrapperOffsetLeft = -offset.left;
- that.wrapperOffsetTop = -offset.top;
- that.scroller.style[vendor + 'TransitionDuration'] = '0';
- that._resetPos(200);
- },
- scrollTo: function (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: function (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 > 0 ? 0 : 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);
- },
- disable: function () {
- this.stop();
- this._resetPos(0);
- this.enabled = false;
-
- this._unbind(MOVE_EV);
- this._unbind(END_EV);
- this._unbind(CANCEL_EV);
- },
-
- enable: function () {
- this.enabled = true;
- },
-
- stop: function () {
- cancelFrame(this.aniTime);
- this.steps = [];
- this.moved = false;
- this.animating = false;
- }
- };
- if (typeof exports !== 'undefined') exports.iScroll = iScroll;
- else window.iScroll = iScroll;
- })();
|