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路径: \\sarrey\videoart\ANA\turnjs4\lib\zoom.js
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/**
 * zoom.js
 * www.turnjs.com
 * turnjs.com/license.txt
 *
 * Copyright (C) 2012 Emmanuel Garcia
 **/

(function($) {

'use strict';

var has3d,

zoomOptions = {
  max: 2,
  flipbook: null,
  easeFunction: 'ease-in-out',
  duration: 500,
  when: {}
},

zoomMethods = {
  init: function(opts) {

    var that = this,
    data = this.data(),
    options = $.extend({}, zoomOptions, opts);

    if (!options.flipbook || !options.flipbook.turn('is')) {
      throw error('options.flipbook is required');
    }

    has3d = 'WebKitCSSMatrix' in window || 'MozPerspective' in document.body.style;

    if (typeof(options.max)!='function') {
      var max = options.max;
      options.max = function() { return max; };
    }

    data.zoom = {
      opts: options,
      axis: point2D(0, 0),
      scrollPos: point2D(0, 0),
      eventQueue: [],
      mouseupEvent: function() {
        return zoomMethods._eMouseUp.apply(that, arguments);
      },
      eventTouchStart: bind(zoomMethods._eTouchStart, that),
      eventTouchMove: bind(zoomMethods._eTouchMove, that),
      eventTouchEnd: bind(zoomMethods._eTouchEnd, that),
      flipbookEvents: {
        zooming: bind(zoomMethods._eZoom, that),
        pressed: bind(zoomMethods._ePressed, that),
        released: bind(zoomMethods._eReleased, that),
        start: bind(zoomMethods._eStart, that),
        turning: bind(zoomMethods._eTurning, that),
        turned: bind(zoomMethods._eTurned, that),
        destroying: bind(zoomMethods._eDestroying, that)
      }
    };

    for (var eventName in options.when) {
      if (Object.prototype.hasOwnProperty.call(options.when, eventName)) {
        this.bind('zoom.'+eventName, options.when[eventName]);
      }
    }

    for (eventName in data.zoom.flipbookEvents) {
      if (Object.prototype.hasOwnProperty.call(data.zoom.flipbookEvents, eventName)) {
        options.flipbook.bind(eventName, data.zoom.flipbookEvents[eventName]);
      }
    }

    this.css({
      position: 'relative',
      overflow : 'hidden'
    });

    if ($.isTouch) {

      options.flipbook.
        bind('touchstart', data.zoom.eventTouchStart ).
        bind('touchmove', data.zoom.eventTouchMove).
        bind('touchend', data.zoom.eventTouchEnd);

      this.bind('touchstart', zoomMethods._tap);

    } else {
      this.mousedown(zoomMethods._mousedown).
        click(zoomMethods._tap);
    }
  },

  _tap: function(event) {
    
    var that = $(this),
      data = that.data().zoom,
      flip = data.opts.flipbook;

    if (data.draggingCorner || data.dragging) {
      return;
    }

    if (isPage($(event.target), that)) {

      zoomMethods._addEvent.call(that, 'tap', event);
      
      var secuence = zoomMethods._eventSeq.call(that);

      if (secuence)
        that.trigger(secuence);

    }

  },

  _addEvent: function(eventName, event) {
    
    var data = this.data().zoom,
      time = (new Date()).getTime(),
      eventObject = {name: eventName, timestamp: time, event: event};

    data.eventQueue.push(eventObject);

    if (data.eventQueue.length>10)
      data.eventQueue.splice(0, 1);

  },

  _eventSeq: function() {

    var data = this.data().zoom,
      list = data.eventQueue,
      lastEvent = list.length-1;

    if (lastEvent>0 &&
      list[lastEvent].name=='tap' &&
      list[lastEvent-1].name=='tap' &&
      list[lastEvent].event.pageX == list[lastEvent-1].event.pageX &&
      list[lastEvent].event.pageY == list[lastEvent-1].event.pageY &&
      list[lastEvent].timestamp-list[lastEvent-1].timestamp < 200 &&
      list[lastEvent].timestamp-list[lastEvent-1].timestamp > 50)
    {
  
      return $.extend(list[lastEvent].event, {type: 'zoom.doubleTap'});

    } else if (list[lastEvent].name=='tap') {
      
      return $.extend(list[lastEvent].event, {type: 'zoom.tap'});

    }
      
  },

  _prepareZoom: function () {
    
    var flipPos, offsetLeft = 0,
      data = this.data().zoom,
      invz = 1/this.zoom('value'),
      flip = data.opts.flipbook,
      dir = flip.turn('direction'),
      flipData = flip.data(),
      flipOffset = flip.offset(),
      thisOffset = this.offset(),
      flipSize = {height: flip.height()},
      view = flip.turn('view');

      if (flip.turn('display')=='double' && flip.data().opts.autoCenter) {
        if (!view[0]) {
          flipSize.width = flip.width()/2;
          offsetLeft = (dir=='ltr') ? flipSize.width : 0;
          flipPos = point2D(
            (dir=='ltr') ? flipOffset.left-thisOffset.left+flipSize.width : flipOffset.left-thisOffset.left,
            flipOffset.top-thisOffset.top
          );

        } else if (!view[1]) {
          flipSize.width = flip.width()/2;
          offsetLeft = (dir=='ltr') ? 0 : flipSize.width;
          flipPos = point2D(
            (dir=='ltr') ? flipOffset.left-thisOffset.left : flipOffset.left-thisOffset.left+flipSize.width,
            flipOffset.top-thisOffset.top
          );
        } else {
          flipSize.width = flip.width();
          flipPos = point2D(
            flipOffset.left-thisOffset.left,
            flipOffset.top-thisOffset.top
          );
        }
      } else {
        flipSize.width = flip.width();
        flipPos = point2D(
          flipOffset.left-thisOffset.left,
          flipOffset.top-thisOffset.top
        );
      }

    if (!data.zoomer) {
      data.zoomer = $('<div />',
        {'class': 'zoomer',
          css: {
            overflow:'hidden',
            position: 'absolute',
            zIndex: '1000000'
          }
        }).
      mousedown(function() {
        return false;
      }).appendTo(this);
    }


    data.zoomer.css({
      top: flipPos.y,
      left: flipPos.x,
      width: flipSize.width,
      height: flipSize.height
    });
    
    var zoomerView = view.join(',');

    if (zoomerView!=data.zoomerView) {

      data.zoomerView = zoomerView;
      data.zoomer.find('*').remove();

      for (var p = 0; p<view.length; p++) {

        if (!view[p])
          continue;

        var pos = flipData.pageObjs[view[p]].offset(),
          pageElement = $(flipData.pageObjs[view[p]]);
          
        pageElement.
          clone().
          transform('').
          css({
            width: pageElement.width()*invz,
            height: pageElement.height()*invz,
            position: 'absolute',
            display: '',
            top: (pos.top - flipOffset.top)*invz,
            left: (pos.left - flipOffset.left - offsetLeft)*invz
          }).
          appendTo(data.zoomer);
      }
    }
    
    
    return {pos: flipPos, size: flipSize};

  },

  value: function() {

    var data = this.data().zoom;

    return data.opts.flipbook.turn('zoom');
  },

  zoomIn: function(event) {

    var pos,
      that = this,
      data = this.data().zoom,
      flip = data.opts.flipbook,
      zoom = data.opts.max(),
      flipOffset = flip.offset(),
      thisOffset = this.offset();

    if (data.zoomIn)
      return this;

    flip.turn('stop');
    
    var ev = $.Event('zoom.change');
    this.trigger(ev, [zoom]);

    if (ev.isDefaultPrevented())
      return this;

    var bound = zoomMethods._prepareZoom.call(this),
      flipPos = bound.pos,
      center = point2D(bound.size.width/2, bound.size.height/2),
      prefix = $.cssPrefix(),
      transitionEnd = $.cssTransitionEnd(),
      autoCenter = flip.data().opts.autoCenter;

    data.scale = zoom;
    flip.data().noCenter = true;

    if (typeof(event)!='undefined') {

      if ('x' in event && 'y' in event) {
        
        pos = point2D(event.x-flipPos.x, event.y-flipPos.y);
      
      } else {

        pos = ($.isTouch) ?
          point2D(
            event.originalEvent.touches[0].pageX-flipPos.x-thisOffset.left,
            event.originalEvent.touches[0].pageY-flipPos.y-thisOffset.top
          )
          :
          point2D(
            event.pageX-flipPos.x-thisOffset.left,
            event.pageY-flipPos.y-thisOffset.top
          );

      }

    } else {
      pos = point2D(center.x, center.y);
    }



    if (pos.x<0 || pos.y<0 || pos.x>bound.width || pos.y>bound.height) {
      pos.x = center.x;
      pos.y = center.y;
    }


    var compose = point2D(
        (pos.x-center.x)*zoom + center.x,
        (pos.y-center.y)*zoom + center.y
      ),
      move = point2D(
        (bound.size.width*zoom>this.width()) ? pos.x-compose.x : 0,
        (bound.size.height*zoom>this.height()) ? pos.y-compose.y : 0
      ),
      maxMove = point2D(
        Math.abs(bound.size.width*zoom-this.width()),
        Math.abs(bound.size.height*zoom-this.height())
      ),
      minMove = point2D(
        Math.min(0, bound.size.width*zoom-this.width()),
        Math.min(0, bound.size.height*zoom-this.height())
      ),
      realPos = point2D(
        center.x*zoom - center.x - flipPos.x - move.x,
        center.y*zoom - center.y - flipPos.y - move.y
      );

    if (realPos.y>maxMove.y)
      move.y = realPos.y - maxMove.y +  move.y;
    else if (realPos.y<minMove.y)
      move.y = realPos.y - minMove.y +  move.y;

    if (realPos.x>maxMove.x)
      move.x = realPos.x - maxMove.x +  move.x;
    else if (realPos.x<minMove.x)
      move.x = realPos.x - minMove.x +  move.x;

    realPos = point2D(
      center.x*zoom - center.x - flipPos.x - move.x,
      center.y*zoom - center.y - flipPos.y - move.y
    );

    var css = {};

    css[prefix+'transition'] = prefix +
      'transform ' +
      data.opts.easeFunction +
      ' ' +
      data.opts.duration +
      'ms';

    var transitionEndCallback = function() {

      that.trigger('zoom.zoomIn');

      data.zoomIn = true;

      data.flipPosition = point2D(flip.css('left'), flip.css('top'));

      flip.turn('zoom', zoom).css({
        position: 'absolute',
        margin: '',
        top:0,
        left:0
      });

      var flipOffset = flip.offset();
      
      data.axis = point2D(
        flipOffset.left - thisOffset.left,
        flipOffset.top - thisOffset.top
      );


      if (autoCenter && flip.turn('display')=='double')
        if ((flip.turn('direction')=='ltr' && !flip.turn('view')[0]) ||
          (flip.turn('direction')=='rtl' && !flip.turn('view')[1])
        )
          data.axis.x = data.axis.x + flip.width()/2;

      that.zoom('scroll', realPos);
      that.bind($.mouseEvents.down, zoomMethods._eMouseDown);
      that.bind($.mouseEvents.move, zoomMethods._eMouseMove);
      $(document).bind($.mouseEvents.up, data.mouseupEvent);
      that.bind('mousewheel', zoomMethods._eMouseWheel);

      setTimeout(function() {
        data.zoomer.hide();
        data.zoomer.remove();
        data.zoomer = null;
        data.zoomerView = null;
      }, 50);

    };

    data.zoomer.css(css).show();

    if (transitionEnd)
      data.zoomer.bind(transitionEnd, function() {
        $(this).unbind(transitionEnd);
        transitionEndCallback();
      });
    else
      setTimeout(transitionEndCallback, data.opts.duration);

    data.zoomer.transform(translate(move.x, move.y, true) + scale(zoom, true));
    
    return this;
  },

  zoomOut: function(duration) {

    var pos, move,
      that = this,
      data = this.data().zoom,
      flip = data.opts.flipbook,
      zoom = 1,
      scaling = zoom/data.scale,
      prefix = $.cssPrefix(),
      transitionEnd = $.cssTransitionEnd(),
      thisOffset = this.offset();

    duration = (typeof(duration)!='undefined') ? duration : data.opts.duration;

    if (!data.zoomIn)
      return;
      
    var ev = $.Event('zoom.change');
    this.trigger(ev, [zoom]);

    if (ev.isDefaultPrevented())
      return this;

    data.zoomIn = false;
    data.scale = zoom;

    flip.data().noCenter = false;

    that.unbind($.mouseEvents.down, zoomMethods._eMouseDown);
    that.unbind($.mouseEvents.move, zoomMethods._eMouseMove);
    $(document).unbind($.mouseEvents.up, data.mouseupEvent);
    that.unbind('mousewheel', zoomMethods._eMouseWheel);

    var css = {};

    css[prefix+'transition'] = prefix +
      'transform ' +
      data.opts.easeFunction +
      ' ' +
      duration +
      'ms';

    flip.css(css);

    var flipDesPos,
      tmp = $('<div />', {
        css: {
          position: 'relative',
          top: data.flipPosition.y,
          left: data.flipPosition.x,
          width: flip.width()*scaling,
          height: flip.height()*scaling,
          background: 'blue'
        }
      }).appendTo(flip.parent());

    flipDesPos = point2D(
      tmp.offset().left-thisOffset.left,
      tmp.offset().top-thisOffset.top
    );
    

    tmp.remove();

    var autoCenter = flip.data().opts.autoCenter;

    if (autoCenter && flip.turn('display')=='double') {

      if (!flip.turn('view')[0])
        flipDesPos.x = (flip.turn('direction')=='ltr') ?
          flipDesPos.x-tmp.width()/4 :
          flipDesPos.x+tmp.width()/4;
      else if (!flip.turn('view')[1])
        flipDesPos.x = (flip.turn('direction')=='ltr') ?
          flipDesPos.x+tmp.width()/4 :
          flipDesPos.x-tmp.width()/4;
    }

    var flipRealPos = $.findPos(flip[0]);
      
    move = point2D(
      -flip.width()/2 - flipRealPos.left + tmp.width()/2 + flipDesPos.x + thisOffset.left,
      -flip.height()/2 - flipRealPos.top + tmp.height()/2 + flipDesPos.y + thisOffset.top);

    var transitionEndCallback = function() {
    
      if (flip[0].style.removeProperty) {
        
        flip[0].style.removeProperty(prefix+'transition');
        flip.transform(
          (flip.turn('options').acceleration) ? translate(0, 0, true) : '').turn('zoom', 1);
        flip[0].style.removeProperty('margin');
        flip.css({
          position: 'relative',
          top: data.flipPosition.y,
          left: data.flipPosition.x
        });

      } else {
        
        flip.transform('none').
          turn('zoom', 1).
          css({
            margin: '',
            top: data.flipPosition.y,
            left: data.flipPosition.x,
            position: 'relative'
        });

      }

      if (autoCenter)
        flip.turn('center');

      that.trigger('zoom.zoomOut');

    };

    if (duration===0) {
  
      transitionEndCallback();

    } else if (transitionEnd) {

      flip.bind(transitionEnd, function() {

        $(this).unbind(transitionEnd);
        transitionEndCallback();

      });

      flip.transform(translate(move.x, move.y, true) + scale(scaling, true));

    } else {

      setTimeout(transitionEndCallback, duration);
      flip.transform(translate(move.x, move.y, true) + scale(scaling, true));

    }

    return this;
  },

  flipbookWidth: function() {
    
    var data = this.data().zoom,
      flipbook = data.opts.flipbook,
      view = flipbook.turn('view');

    return (flipbook.turn('display')=='double' && (!view[0] || !view[1])) ?
      flipbook.width()/2
      :
      flipbook.width();

  },

  scroll: function(to, unlimited, animate) {
    
    var data = this.data().zoom,
      flip = data.opts.flipbook,
      flipWidth = this.zoom('flipbookWidth'),
      prefix = $.cssPrefix();
    
    if (has3d) {

      var css = {};

      if (animate) {
        css[prefix+'transition'] = prefix + 'transform 200ms';
      } else {
        css[prefix+'transition'] = 'none';
      }

      flip.css(css);
      flip.transform(translate(-data.axis.x - to.x, -data.axis.y - to.y, true));

    } else {
      
      flip.css({top: -data.axis.y - to.y, left: -data.axis.x - to.x});

    }

    if (!unlimited) {

      var out,
        minBound = point2D(
          Math.min(0, (flipWidth-this.width())/2),
          Math.min(0, (flip.height()-this.height())/2)),
        maxBound = point2D(
          (flipWidth>this.width()) ? flipWidth-this.width() : (flipWidth-this.width())/2,
          (flip.height()>this.height()) ? flip.height()-this.height() : (flip.height()-this.height())/2
        );

      if (to.y<minBound.y) {
        to.y = minBound.y;
        out = true;
      } else if (to.y>maxBound.y) {
        to.y = maxBound.y;
        out = true;
      }

      if (to.x<minBound.x) {
        to.x = minBound.x;
        out = true;
      } else if (to.x>maxBound.x) {
        to.x = maxBound.x;
        out = true;
      }

      if (out) {
        this.zoom('scroll', to, true, true);
      }

    }

    data.scrollPos = point2D(to.x, to.y);

  },

  resize: function() {

    var data = this.data().zoom,
      flip = data.opts.flipbook;
    
    if (this.zoom('value')>1) {

      var  flipOffset = flip.offset(),
        thisOffset = this.offset();

      data.axis =  point2D(
        (flipOffset.left - thisOffset.left) + (data.axis.x + data.scrollPos.x),
        (flipOffset.top - thisOffset.top) + (data.axis.y + data.scrollPos.y)
      );

      if (flip.turn('display')=='double' &&
        flip.turn('direction')=='ltr' &&
        !flip.turn('view')[0])
          data.axis.x = data.axis.x + flip.width()/2;

      this.zoom('scroll', data.scrollPos);
    }

  },

  _eZoom: function() {
    
    var flipPos,
      data = this.data().zoom,
      flip = data.opts.flipbook,
      view = flip.turn('view');

    for (var p = 0; p<view.length; p++) {
      if (view[p])
        this.trigger('zoom.resize',
          [data.scale, view[p], flip.data().pageObjs[view[p]]]
        );
    }
  },

  _eStart: function(event, pageObj) {

    if (this.zoom('value')!=1) {
      event.preventDefault();
    }


  },

  _eTurning: function(event, page, view) {

    var that = this,
      zoom = this.zoom('value'),
      data = this.data().zoom,
      flip = data.opts.flipbook;

    data.page = flip.turn('page');

    if (zoom!=1) {
      for (var p = 0; p<view.length; p++) {
        if (view[p])
          this.trigger('zoom.resize',
            [zoom, view[p], flip.data().pageObjs[view[p]]]
          );
      }

      setTimeout(function() {
        that.zoom('resize');
      }, 0);
    }

  },

  _eTurned: function (event, page) {
    
    if (this.zoom('value')!=1) {
      var that = this,
        data = this.data().zoom,
        flip = data.opts.flipbook;

      if (page>data.page)
        this.zoom('scroll',
          point2D(0, data.scrollPos.y), false, true);
        
      else if (page<data.page)
        this.zoom('scroll',
          point2D(flip.width(), data.scrollPos.y), false, true);
    
    }
  },

  _ePressed: function() {
    
    var data = $(this).data().zoom;
    data.draggingCorner = true;

  },

  _eReleased: function() {

    var data = $(this).data().zoom;

    setTimeout(function() {
      data.draggingCorner = false;
    }, 1);

  },

  _eMouseDown: function(event) {
    
    var data = $(this).data().zoom;

    data.draggingCur = ($.isTouch) ?
      point2D(
        event.originalEvent.touches[0].pageX,
        event.originalEvent.touches[0].pageY
      )
      :
      point2D(event.pageX, event.pageY);
    
    return false;
  },

  _eMouseMove: function(event) {

    var data = $(this).data().zoom;
        
    if (data.draggingCur) {

      data.dragging = true;

      var cur = ($.isTouch) ?
        point2D(
          event.originalEvent.touches[0].pageX,
          event.originalEvent.touches[0].pageY
        )
        :
        point2D(event.pageX, event.pageY),
        motion = point2D(
          cur.x- data.draggingCur.x,
          cur.y-data.draggingCur.y
        );

      $(this).zoom('scroll',
        point2D(
          data.scrollPos.x-motion.x,
          data.scrollPos.y-motion.y
        ), true
      );

      data.draggingCur = cur;

      return false;
    }

  },

  _eMouseUp: function(event) {

    var data = $(this).data().zoom;

    if (data.dragging) {
      $(this).zoom('scroll', data.scrollPos);
    }

    data.draggingCur = null;

    setTimeout(function() {
      data.dragging = false;
    }, 1);

  },

  _eMouseWheel: function(event, delta, deltaX, deltaY) {
    
    var data = $(this).data().zoom,
      cur = point2D(
        data.scrollPos.x + deltaX*10,
        data.scrollPos.y - deltaY*10
      );
    
    $(this).zoom('scroll', cur, false, true);
    
  },

  _eTouchStart: function(event, page) {

    var data = $(this).data().zoom,
      flip = data.opts.flipbook,
      finger = point2D(
        event.originalEvent.touches[0].pageX,
        event.originalEvent.touches[0].pageY
      );

    data.touch = {};
    data.touch.initial = finger;
    data.touch.last = finger;
    data.touch.timestamp = (new Date()).getTime();
    data.touch.speed = point2D(0, 0);

  },

  _eTouchMove: function(event) {
    
    var data = $(this).data().zoom,
      zoom = $(this).zoom('value'),
      flip = data.opts.flipbook,
      time = (new Date()).getTime(),
      finger = point2D(
        event.originalEvent.touches[0].pageX,
        event.originalEvent.touches[0].pageY
      );
    
    if (data.touch && zoom==1 && !flip.data().mouseAction) {
      data.touch.motion = point2D(
        finger.x-data.touch.last.x,
        finger.y-data.touch.last.y);

    
      data.touch.speed.x = (data.touch.speed.x===0) ?
        data.touch.motion.x / (time-data.touch.timestamp) :
        (data.touch.speed.x + (data.touch.motion.x / (time-data.touch.timestamp)))/2;

      data.touch.last = finger;
      data.touch.timestamp = time;
    }

  },

  _eTouchEnd: function(event) {

    var data = $(this).data().zoom;

    if (data.touch && $(this).zoom('value')==1) {

      var y = Math.abs(data.touch.initial.y - data.touch.last.y);

      if (y<50 && (data.touch.speed.x<-1 || data.touch.last.x-data.touch.initial.x<-100)) {
        
        this.trigger('zoom.swipeLeft');

      } else if(y<50 && (data.touch.speed.x>1 || data.touch.last.x-data.touch.initial.x>100)){
        
        this.trigger('zoom.swipeRight');

      }

    }
  },

  _eDestroying: function() {

    var that = this,
      data = this.data().zoom,
      flip = data.opts.flipbook,
      events = [
        'tap',
        'doubleTap',
        'resize',
        'zoomIn',
        'zoomOut',
        'swipeLeft',
        'swipeRight'
      ];

    this.zoom('zoomOut', 0);

    $.each(events, function(index, eventName) {
      that.unbind('zoom.' + eventName);
    });
    
    for (var eventName in data.flipbookEvents) {
      if (Object.prototype.hasOwnProperty.call(data.flipbookEvents, eventName)) {
        flip.unbind(eventName, data.flipbookEvents[eventName]);
      }
    }

    flip.unbind('touchstart', data.eventTouchStart ).
      unbind('touchmove', data.eventTouchMove).
      unbind('touchend', data.eventTouchEnd);
        
    this.unbind('touchstart', zoomMethods._tap).
      unbind('click', zoomMethods._tap);

    data = null;
    this.data().zoom = null;

  }
};

function isPage(element, last) {

  if (element[0]==last[0])
    return false;

  if (element.attr('page'))
    return true;
  
  return (element.parent()[0]) ?
    isPage(element.parent(), last)
    :
  false;

}

function error(message) {

  function TurnJsError(message) {
    this.name = "TurnJsError";
    this.message = message;
  }

  TurnJsError.prototype = new Error();
  TurnJsError.prototype.constructor = TurnJsError;
  return new TurnJsError(message);

}

function translate(x, y, use3d) {
  
  return (has3d && use3d) ? ' translate3d(' + x + 'px,' + y + 'px, 0px) '
  : ' translate(' + x + 'px, ' + y + 'px) ';

}

function scale(v, use3d) {
  
  return (has3d && use3d) ? ' scale3d(' + v + ', ' + v + ', 1) '
  : ' scale(' + v + ') ';

}

function point2D(x, y) {
  
  return {x: x, y: y};

}

function bind(func, context) {

  return function() {
    return func.apply(context, arguments);
  };

}

$.extend($.fn, {
  zoom: function() {
    
    var args = arguments;

    if (!args[0] || typeof(args[0])=='object')
      return zoomMethods.init.apply($(this[0]), args);
    else if (zoomMethods[args[0]])
      return zoomMethods[args[0]].apply($(this[0]), Array.prototype.slice.call(args, 1));
    else
      throw error(args[0] + ' is not a method');

  }
});

})(jQuery);
zoom.js
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