Ручной скроллинг как на IPhone и IPad

Ручной скроллинг как на IPhone и IPad

21.06.201220035admin

Скрипт не требует подключения JQuery. Можно использовать этот скрипт скроллинга как для отдельных элементов сайта, так и для всей страницы, заключив содержимое в DIV элементы. Ручной скроллинг как на IPhone и IPad для всех браузеров, работает даже в последних версиях IE. Текст, содержащийся в скроллирующем элементе, не выделяется, также проблема с вызовом скриптов события ONCLICK на ссылках в области скроллинга. Используйте скрипт с умом, дабы избежать казусов. Эффект интересный, но это не стоит потери функционала.

Скроллить страницу перетягиванием курсора весьма удобно. Еще одна доработка – это фон на «оттянутом» месте. Содержимое перетаскивается курсором вниз и вверх, но можно оттянуть наше содержимое больше нужного, на этом месте поставлен серый фон, как на IPhone и IPad.

Код JavaScript

Code
<script type="text/javascript" src="iscroll.js"></script>

<script type="text/javascript">
var myScroll;
function loaded() {
  myScroll = new iScroll('wrapper');
}

document.addEventListener('touchmove', function (e) { e.preventDefault(); }, false);

/* * * * * * * *
  *
  * Use this for high compatibility (iDevice + Android)
  *
  */
document.addEventListener('DOMContentLoaded', function () { setTimeout(loaded, 200); }, false);
/*
  * * * * * * * */

/* * * * * * * *
  *
  * Use this for iDevice only
  *
  */
//document.addEventListener('DOMContentLoaded', loaded, false);
/*
  * * * * * * * */

/* * * * * * * *
  *
  * Use this if nothing else works
  *
  */
//window.addEventListener('load', setTimeout(function () { loaded(); }, 200), false);
/*
  * * * * * * * */

</script>


Код HTML

Code
<div id="wrapper">
  <div id="scroller">
  <!--Содержимое страницы-->
  <ul id="thelist">
  <li>Пункт</li>
  <li>Пункт</li>
  <li>Пункт</li>
  <li>Пункт</li>
  </ul>
  <!--/Содержимое страницы-->
  </div>
</div>


Код CSS

Code
<style type="text/css" media="all">
body {
  padding:0;
  margin:0;
  border:0;
  -webkit-user-select:none;
  -webkit-text-size-adjust:none;
}

#wrapper {
  position:absolute; z-index:1;
  top:0px; bottom:0px; left:0;
  width:100%;
  background:#222 url('black_linen.png');
  overflow:auto;
}

#scroller {
  position:absolute; z-index:1;
/* -webkit-touch-callout:none;*/
  -webkit-tap-highlight-color:rgba(0,0,0,0);
  width:100%;
  padding:0;
}


Содержимое файла iscroll.js

Code
/*!
  * iScroll v4.1.9 ~ Copyright (c) 2011 Matteo Spinelli, http://cubiq.org
  * Released under MIT license, http://cubiq.org/license
  */
(function(){
var m = Math,
  mround = function (r) { return r >> 0; },
  vendor = (/webkit/i).test(navigator.appVersion) ? 'webkit' :
  (/firefox/i).test(navigator.userAgent) ? 'Moz' :
  (/trident/i).test(navigator.userAgent) ? 'ms' :
  'opera' in window ? 'O' : '',

  // Browser capabilities
  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, 1); }
  })(),
  cancelFrame = (function () {
  return window.cancelRequestAnimationFrame
  || window.webkitCancelAnimationFrame
  || window.webkitCancelRequestAnimationFrame
  || window.mozCancelRequestAnimationFrame
  || window.oCancelRequestAnimationFrame
  || window.msCancelRequestAnimationFrame
  || clearTimeout
  })(),

  // Events
  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',
  WHEEL_EV = vendor == 'Moz' ? 'DOMMouseScroll' : 'mousewheel',

  // Helpers
  trnOpen = 'translate' + (has3d ? '3d(' : '('),
  trnClose = has3d ? ',0)' : ')',

  // Constructor
  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];

  // 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, // Experimental

  // 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: function (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 : false;
  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 ){
  trnOpen = 'translate(';
  trnClose = ')';
  }
   
  // Set some default styles
  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';

  if (that.options.useTransition) that.options.fixedScrollbar = true;

  that.refresh();

  that._bind(RESIZE_EV, window);
  that._bind(START_EV);
  if (!hasTouch) {
  that._bind('mouseout', that.wrapper);
  if (that.options.wheelAction != 'none')
  that._bind(WHEEL_EV);
  }

  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: 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 WHEEL_EV: that._wheel(e); break;
  case 'mouseout': that._mouseout(e); break;
  case 'webkitTransitionEnd': that._transitionEnd(e); break;
  }
  },
   
  _checkDOMChanges: function () {
  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: function (dir) {
  var that = this,
  doc = document,
  bar;

  if (!that[dir + 'Scrollbar']) {
  if (that[dir + 'ScrollbarWrapper']) {
  if (hasTransform) that[dir + 'ScrollbarIndicator'].style[vendor + '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;-' + vendor + '-transition-property:opacity;-' + vendor + '-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);-' + vendor + '-background-clip:padding-box;-' + vendor + '-box-sizing:border-box;' + (dir == 'h' ? 'height:100%' : 'width:100%') + ';-' + vendor + '-border-radius:3px;border-radius:3px';
  }
  bar.style.cssText += ';pointer-events:none;-' + vendor + '-transition-property:-' + vendor + '-transform;-' + vendor + '-transition-timing-function:cubic-bezier(0.33,0.66,0.66,1);-' + vendor + '-transition-duration:0;-' + vendor + '-transform:' + trnOpen + '0,0' + trnClose;
  if (that.options.useTransition) bar.style.cssText += ';-' + vendor + '-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(mround(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(mround(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: function () {
  var that = this;
  setTimeout(function () { that.refresh(); }, isAndroid ? 200 : 0);
  },
   
  _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;

  this._scrollbarPos('h');
  this._scrollbarPos('v');
  },

  _scrollbarPos: function (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'] + mround(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'] - mround((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[vendor + 'TransitionDelay'] = '0';
  that[dir + 'ScrollbarWrapper'].style.opacity = hidden && that.options.hideScrollbar ? '0' : '1';
  that[dir + 'ScrollbarIndicator'].style[vendor + 'Transform'] = trnOpen + (dir == 'h' ? pos + 'px,0' : '0,' + pos + 'px') + trnClose;
  },
   
  _start: function (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)[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.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);
  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,
  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[vendor + 'Transform'] = trnOpen + newX + 'px,' + newY + 'px' + trnClose + ' scale(' + scale + ')';

  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: 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,
  distX, distY,
  newDuration,
  snap,
  scale;

  that._unbind(MOVE_EV);
  that._unbind(END_EV);
  that._unbind(CANCEL_EV);

  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[vendor + 'TransitionDuration'] = '200ms';
  that.scroller.style[vendor + 'Transform'] = trnOpen + that.x + 'px,' + that.y + 'px' + trnClose + ' scale(' + that.scale + ')';
   
  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 {
  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 = 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.options.zoom ? 250 : 0);
  }
  }

  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 - 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(mround(newPosX), mround(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: function (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[vendor + 'TransitionDelay'] = '300ms';
  that.hScrollbarWrapper.style.opacity = '0';
  }
  if (that.vScrollbar && that.options.hideScrollbar) {
  if (vendor == 'webkit') that.vScrollbarWrapper.style[vendor + 'TransitionDelay'] = '300ms';
  that.vScrollbarWrapper.style.opacity = '0';
  }

  return;
  }

  that.scrollTo(resetX, resetY, time || 0);
  },

  _wheel: function (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;

  that.scrollTo(deltaX, deltaY, 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();
  },

  /**
  *
  * Utilities
  *
  */
  _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); // 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: function (time) {
  time += 'ms';
  this.scroller.style[vendor + 'TransitionDuration'] = time;
  if (this.hScrollbar) this.hScrollbarIndicator.style[vendor + 'TransitionDuration'] = time;
  if (this.vScrollbar) this.vScrollbarIndicator.style[vendor + 'TransitionDuration'] = time;
  },

  _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;

  // 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: mround(newTime) };
  },

  _offset: function (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: function (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 = mround(m.max(sizeX, sizeY)) || 200;

  return { x: x, y: y, time: time };
  },

  _bind: function (type, el, bubble) {
  (el || this.scroller).addEventListener(type, this, !!bubble);
  },

  _unbind: function (type, el, bubble) {
  (el || this.scroller).removeEventListener(type, this, !!bubble);
  },

  /**
  *
  * Public methods
  *
  */
  destroy: function () {
  var that = this;

  that.scroller.style[vendor + '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);
  that._unbind(END_EV);
  that._unbind(CANCEL_EV);
   
  if (!that.options.hasTouch) {
  that._unbind('mouseout', that.wrapper);
  that._unbind(WHEEL_EV);
  }
   
  if (that.options.useTransition) that._unbind('webkitTransitionEnd');
   
  if (that.options.checkDOMChanges) clearInterval(that.checkDOMTime);
   
  if (that.options.onDestroy) that.options.onDestroy.call(that);
  },

  refresh: function () {
  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 = mround(that.scroller.offsetWidth * that.scale);
  that.scrollerH = mround((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[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 > 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: function (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: function () {
  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);
  this._unbind(END_EV);
  this._unbind(CANCEL_EV);
  },
   
  enable: function () {
  this.enabled = true;
  },
   
  stop: function () {
  if (this.options.useTransition) this._unbind('webkitTransitionEnd');
  else cancelFrame(this.aniTime);
  this.steps = [];
  this.moved = false;
  this.animating = false;
  },
   
  zoom: function (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[vendor + 'TransitionDuration'] = time + 'ms';
  that.scroller.style[vendor + 'Transform'] = trnOpen + that.x + 'px,' + that.y + 'px' + trnClose + ' scale(' + scale + ')';
  that.zoomed = false;
  },
   
  isReady: function () {
  return !this.moved && !this.zoomed && !this.animating;
  }
};

if (typeof exports !== 'undefined') exports.iScroll = iScroll;
else window.iScroll = iScroll;

})();



Сохраните в социальную сеть
Комментарии (5)
Прикольно но бессмысленно...
0
Гость 22.06.2012 в 07:27Спам
Класс, спасибо за скрипт! Поставлю для Чата и статистики :)
0
Согласен с Insider
0
Для чата не советую, я сам изначально этот скроллинг для чата ставил. Проблемы будут следующие: невозможен переход на страницы пользователей, выделение текста нет (это уже писалось выше), пропадает в некоторых браузерах сглаживание шрифтов.
0
Гость 22.06.2012 в 21:02Спам
можно использовать в списках :)
0
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