text: // svg-pan-zoom v3.2.3
  // https://github.com/ariutta/svg-pan-zoom
  (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
  var svgPanZoom = require('./svg-pan-zoom.js');
  
  // UMD module definition
  (function(window, document){
    // AMD
    if (typeof define === 'function' && define.amd) {
      define('svg-pan-zoom', function () {
        return svgPanZoom;
      });
    // CMD
    } else if (typeof module !== 'undefined' && module.exports) {
      module.exports = svgPanZoom;
  
      // Browser
      // Keep exporting globally as module.exports is available because of browserify
      window.svgPanZoom = svgPanZoom;
    }
  })(window, document)
  
  },{"./svg-pan-zoom.js":4}],2:[function(require,module,exports){
  var SvgUtils = require('./svg-utilities');
  
  module.exports = {
    enable: function(instance) {
      // Select (and create if necessary) defs
      var defs = instance.svg.querySelector('defs')
      if (!defs) {
        defs = document.createElementNS(SvgUtils.svgNS, 'defs')
        instance.svg.appendChild(defs)
      }
  
      // Create style element
      var style = document.createElementNS(SvgUtils.svgNS, 'style')
      style.setAttribute('type', 'text/css')
      style.textContent = '.svg-pan-zoom-control { cursor: pointer; fill: black; fill-opacity: 0.333; } .svg-pan-zoom-control:hover { fill-opacity: 0.8; } .svg-pan-zoom-control-background { fill: white; fill-opacity: 0.5; } .svg-pan-zoom-control-background { fill-opacity: 0.8; }'
      defs.appendChild(style)
  
  
      // Zoom Group
      var zoomGroup = document.createElementNS(SvgUtils.svgNS, 'g');
      zoomGroup.setAttribute('id', 'svg-pan-zoom-controls');
      zoomGroup.setAttribute('transform', 'translate(' + ( instance.width - 70 ) + ' ' + ( instance.height - 76 ) + ') scale(0.75)');
      zoomGroup.setAttribute('class', 'svg-pan-zoom-control');
  
      // Control elements
      zoomGroup.appendChild(this._createZoomIn(instance))
      zoomGroup.appendChild(this._createZoomReset(instance))
      zoomGroup.appendChild(this._createZoomOut(instance))
  
      // Finally append created element
      instance.svg.appendChild(zoomGroup)
  
      // Cache control instance
      instance.controlIcons = zoomGroup
    }
  
  , _createZoomIn: function(instance) {
      var zoomIn = document.createElementNS(SvgUtils.svgNS, 'g');
      zoomIn.setAttribute('id', 'svg-pan-zoom-zoom-in');
      zoomIn.setAttribute('transform', 'translate(30.5 5) scale(0.015)');
      zoomIn.setAttribute('class', 'svg-pan-zoom-control');
      zoomIn.addEventListener('click', function() {instance.getPublicInstance().zoomIn()}, false)
      zoomIn.addEventListener('touchstart', function() {instance.getPublicInstance().zoomIn()}, false)
  
      var zoomInBackground = document.createElementNS(SvgUtils.svgNS, 'rect'); // TODO change these background space fillers to rounded rectangles so they look prettier
      zoomInBackground.setAttribute('x', '0');
      zoomInBackground.setAttribute('y', '0');
      zoomInBackground.setAttribute('width', '1500'); // larger than expected because the whole group is transformed to scale down
      zoomInBackground.setAttribute('height', '1400');
      zoomInBackground.setAttribute('class', 'svg-pan-zoom-control-background');
      zoomIn.appendChild(zoomInBackground);
  
      var zoomInShape = document.createElementNS(SvgUtils.svgNS, 'path');
      zoomInShape.setAttribute('d', 'M1280 576v128q0 26 -19 45t-45 19h-320v320q0 26 -19 45t-45 19h-128q-26 0 -45 -19t-19 -45v-320h-320q-26 0 -45 -19t-19 -45v-128q0 -26 19 -45t45 -19h320v-320q0 -26 19 -45t45 -19h128q26 0 45 19t19 45v320h320q26 0 45 19t19 45zM1536 1120v-960 q0 -119 -84.5 -203.5t-203.5 -84.5h-960q-119 0 -203.5 84.5t-84.5 203.5v960q0 119 84.5 203.5t203.5 84.5h960q119 0 203.5 -84.5t84.5 -203.5z');
      zoomInShape.setAttribute('class', 'svg-pan-zoom-control-element');
      zoomIn.appendChild(zoomInShape);
  
      return zoomIn
    }
  
  , _createZoomReset: function(instance){
      // reset
      var resetPanZoomControl = document.createElementNS(SvgUtils.svgNS, 'g');
      resetPanZoomControl.setAttribute('id', 'svg-pan-zoom-reset-pan-zoom');
      resetPanZoomControl.setAttribute('transform', 'translate(5 35) scale(0.4)');
      resetPanZoomControl.setAttribute('class', 'svg-pan-zoom-control');
      resetPanZoomControl.addEventListener('click', function() {instance.getPublicInstance().reset()}, false);
      resetPanZoomControl.addEventListener('touchstart', function() {instance.getPublicInstance().reset()}, false);
  
      var resetPanZoomControlBackground = document.createElementNS(SvgUtils.svgNS, 'rect'); // TODO change these background space fillers to rounded rectangles so they look prettier
      resetPanZoomControlBackground.setAttribute('x', '2');
      resetPanZoomControlBackground.setAttribute('y', '2');
      resetPanZoomControlBackground.setAttribute('width', '182'); // larger than expected because the whole group is transformed to scale down
      resetPanZoomControlBackground.setAttribute('height', '58');
      resetPanZoomControlBackground.setAttribute('class', 'svg-pan-zoom-control-background');
      resetPanZoomControl.appendChild(resetPanZoomControlBackground);
  
      var resetPanZoomControlShape1 = document.createElementNS(SvgUtils.svgNS, 'path');
      resetPanZoomControlShape1.setAttribute('d', 'M33.051,20.632c-0.742-0.406-1.854-0.609-3.338-0.609h-7.969v9.281h7.769c1.543,0,2.701-0.188,3.473-0.562c1.365-0.656,2.048-1.953,2.048-3.891C35.032,22.757,34.372,21.351,33.051,20.632z');
      resetPanZoomControlShape1.setAttribute('class', 'svg-pan-zoom-control-element');
      resetPanZoomControl.appendChild(resetPanZoomControlShape1);
  
      var resetPanZoomControlShape2 = document.createElementNS(SvgUtils.svgNS, 'path');
      resetPanZoomControlShape2.setAttribute('d', 'M170.231,0.5H15.847C7.102,0.5,0.5,5.708,0.5,11.84v38.861C0.5,56.833,7.102,61.5,15.847,61.5h154.384c8.745,0,15.269-4.667,15.269-10.798V11.84C185.5,5.708,178.976,0.5,170.231,0.5z M42.837,48.569h-7.969c-0.219-0.766-0.375-1.383-0.469-1.852c-0.188-0.969-0.289-1.961-0.305-2.977l-0.047-3.211c-0.03-2.203-0.41-3.672-1.142-4.406c-0.732-0.734-2.103-1.102-4.113-1.102h-7.05v13.547h-7.055V14.022h16.524c2.361,0.047,4.178,0.344,5.45,0.891c1.272,0.547,2.351,1.352,3.234,2.414c0.731,0.875,1.31,1.844,1.737,2.906s0.64,2.273,0.64,3.633c0,1.641-0.414,3.254-1.242,4.84s-2.195,2.707-4.102,3.363c1.594,0.641,2.723,1.551,3.387,2.73s0.996,2.98,0.996,5.402v2.32c0,1.578,0.063,2.648,0.19,3.211c0.19,0.891,0.635,1.547,1.333,1.969V48.569z M75.579,48.569h-26.18V14.022h25.336v6.117H56.454v7.336h16.781v6H56.454v8.883h19.125V48.569z M104.497,46.331c-2.44,2.086-5.887,3.129-10.34,3.129c-4.548,0-8.125-1.027-10.731-3.082s-3.909-4.879-3.909-8.473h6.891c0.224,1.578,0.662,2.758,1.316,3.539c1.196,1.422,3.246,2.133,6.15,2.133c1.739,0,3.151-0.188,4.236-0.562c2.058-0.719,3.087-2.055,3.087-4.008c0-1.141-0.504-2.023-1.512-2.648c-1.008-0.609-2.607-1.148-4.796-1.617l-3.74-0.82c-3.676-0.812-6.201-1.695-7.576-2.648c-2.328-1.594-3.492-4.086-3.492-7.477c0-3.094,1.139-5.664,3.417-7.711s5.623-3.07,10.036-3.07c3.685,0,6.829,0.965,9.431,2.895c2.602,1.93,3.966,4.73,4.093,8.402h-6.938c-0.128-2.078-1.057-3.555-2.787-4.43c-1.154-0.578-2.587-0.867-4.301-0.867c-1.907,0-3.428,0.375-4.565,1.125c-1.138,0.75-1.706,1.797-1.706,3.141c0,1.234,0.561,2.156,1.682,2.766c0.721,0.406,2.25,0.883,4.589,1.43l6.063,1.43c2.657,0.625,4.648,1.461,5.975,2.508c2.059,1.625,3.089,3.977,3.089,7.055C108.157,41.624,106.937,44.245,104.497,46.331z M139.61,48.569h-26.18V14.022h25.336v6.117h-18.281v7.336h16.781v6h-16.781v8.883h19.125V48.569z M170.337,20.14h-10.336v28.43h-7.266V20.14h-10.383v-6.117h27.984V20.14z');
      resetPanZoomControlShape2.setAttribute('class', 'svg-pan-zoom-control-element');
      resetPanZoomControl.appendChild(resetPanZoomControlShape2);
  
      return resetPanZoomControl
    }
  
  , _createZoomOut: function(instance){
      // zoom out
      var zoomOut = document.createElementNS(SvgUtils.svgNS, 'g');
      zoomOut.setAttribute('id', 'svg-pan-zoom-zoom-out');
      zoomOut.setAttribute('transform', 'translate(30.5 70) scale(0.015)');
      zoomOut.setAttribute('class', 'svg-pan-zoom-control');
      zoomOut.addEventListener('click', function() {instance.getPublicInstance().zoomOut()}, false);
      zoomOut.addEventListener('touchstart', function() {instance.getPublicInstance().zoomOut()}, false);
  
      var zoomOutBackground = document.createElementNS(SvgUtils.svgNS, 'rect'); // TODO change these background space fillers to rounded rectangles so they look prettier
      zoomOutBackground.setAttribute('x', '0');
      zoomOutBackground.setAttribute('y', '0');
      zoomOutBackground.setAttribute('width', '1500'); // larger than expected because the whole group is transformed to scale down
      zoomOutBackground.setAttribute('height', '1400');
      zoomOutBackground.setAttribute('class', 'svg-pan-zoom-control-background');
      zoomOut.appendChild(zoomOutBackground);
  
      var zoomOutShape = document.createElementNS(SvgUtils.svgNS, 'path');
      zoomOutShape.setAttribute('d', 'M1280 576v128q0 26 -19 45t-45 19h-896q-26 0 -45 -19t-19 -45v-128q0 -26 19 -45t45 -19h896q26 0 45 19t19 45zM1536 1120v-960q0 -119 -84.5 -203.5t-203.5 -84.5h-960q-119 0 -203.5 84.5t-84.5 203.5v960q0 119 84.5 203.5t203.5 84.5h960q119 0 203.5 -84.5 t84.5 -203.5z');
      zoomOutShape.setAttribute('class', 'svg-pan-zoom-control-element');
      zoomOut.appendChild(zoomOutShape);
  
      return zoomOut
    }
  
  , disable: function(instance) {
      if (instance.controlIcons) {
        instance.controlIcons.parentNode.removeChild(instance.controlIcons)
        instance.controlIcons = null
      }
    }
  }
  
  },{"./svg-utilities":5}],3:[function(require,module,exports){
  var SvgUtils = require('./svg-utilities')
    , Utils = require('./utilities')
    ;
  
  var ShadowViewport = function(viewport, options){
    this.init(viewport, options)
  }
  
  /**
   * Initialization
   *
   * @param  {SVGElement} viewport
   * @param  {Object} options
   */
  ShadowViewport.prototype.init = function(viewport, options) {
    // DOM Elements
    this.viewport = viewport
    this.options = options
  
    // State cache
    this.originalState = {zoom: 1, x: 0, y: 0}
    this.activeState = {zoom: 1, x: 0, y: 0}
  
    this.updateCTMCached = Utils.proxy(this.updateCTM, this)
  
    // Create a custom requestAnimationFrame taking in account refreshRate
    this.requestAnimationFrame = Utils.createRequestAnimationFrame(this.options.refreshRate)
  
    // ViewBox
    this.viewBox = {x: 0, y: 0, width: 0, height: 0}
    this.cacheViewBox()
  
    // Process CTM
    this.processCTM()
  
    // Update CTM in this frame
    this.updateCTM()
  }
  
  /**
   * Cache initial viewBox value
   * If no viewBox is defined, then use viewport size/position instead for viewBox values
   */
  ShadowViewport.prototype.cacheViewBox = function() {
    var svgViewBox = this.options.svg.getAttribute('viewBox')
  
    if (svgViewBox) {
      var viewBoxValues = svgViewBox.split(/[\s\,]/).filter(function(v){return v}).map(parseFloat)
  
      // Cache viewbox x and y offset
      this.viewBox.x = viewBoxValues[0]
      this.viewBox.y = viewBoxValues[1]
      this.viewBox.width = viewBoxValues[2]
      this.viewBox.height = viewBoxValues[3]
  
      var zoom = Math.min(this.options.width / this.viewBox.width, this.options.height / this.viewBox.height)
  
      // Update active state
      this.activeState.zoom = zoom
      this.activeState.x = (this.options.width - this.viewBox.width * zoom) / 2
      this.activeState.y = (this.options.height - this.viewBox.height * zoom) / 2
  
      // Force updating CTM
      this.updateCTMOnNextFrame()
  
      this.options.svg.removeAttribute('viewBox')
    } else {
      var bBox = this.viewport.getBBox();
  
      // Cache viewbox sizes
      this.viewBox.x = bBox.x;
      this.viewBox.y = bBox.y;
      this.viewBox.width = bBox.width
      this.viewBox.height = bBox.height
    }
  }
  
  /**
   * Recalculate viewport sizes and update viewBox cache
   */
  ShadowViewport.prototype.recacheViewBox = function() {
    var boundingClientRect = this.viewport.getBoundingClientRect()
      , viewBoxWidth = boundingClientRect.width / this.getZoom()
      , viewBoxHeight = boundingClientRect.height / this.getZoom()
  
    // Cache viewbox
    this.viewBox.x = 0
    this.viewBox.y = 0
    this.viewBox.width = viewBoxWidth
    this.viewBox.height = viewBoxHeight
  }
  
  /**
   * Returns a viewbox object. Safe to alter
   *
   * @return {Object} viewbox object
   */
  ShadowViewport.prototype.getViewBox = function() {
    return Utils.extend({}, this.viewBox)
  }
  
  /**
   * Get initial zoom and pan values. Save them into originalState
   * Parses viewBox attribute to alter initial sizes
   */
  ShadowViewport.prototype.processCTM = function() {
    var newCTM = this.getCTM()
  
    if (this.options.fit || this.options.contain) {
      var newScale;
      if (this.options.fit) {
        newScale = Math.min(this.options.width/this.viewBox.width, this.options.height/this.viewBox.height);
      } else {
        newScale = Math.max(this.options.width/this.viewBox.width, this.options.height/this.viewBox.height);
      }
  
      newCTM.a = newScale; //x-scale
      newCTM.d = newScale; //y-scale
      newCTM.e = -this.viewBox.x * newScale; //x-transform
      newCTM.f = -this.viewBox.y * newScale; //y-transform
    }
  
    if (this.options.center) {
      var offsetX = (this.options.width - (this.viewBox.width + this.viewBox.x * 2) * newCTM.a) * 0.5
        , offsetY = (this.options.height - (this.viewBox.height + this.viewBox.y * 2) * newCTM.a) * 0.5
  
      newCTM.e = offsetX
      newCTM.f = offsetY
    }
  
    // Cache initial values. Based on activeState and fix+center opitons
    this.originalState.zoom = newCTM.a
    this.originalState.x = newCTM.e
    this.originalState.y = newCTM.f
  
    // Update viewport CTM and cache zoom and pan
    this.setCTM(newCTM);
  }
  
  /**
   * Return originalState object. Safe to alter
   *
   * @return {Object}
   */
  ShadowViewport.prototype.getOriginalState = function() {
    return Utils.extend({}, this.originalState)
  }
  
  /**
   * Return actualState object. Safe to alter
   *
   * @return {Object}
   */
  ShadowViewport.prototype.getState = function() {
    return Utils.extend({}, this.activeState)
  }
  
  /**
   * Get zoom scale
   *
   * @return {Float} zoom scale
   */
  ShadowViewport.prototype.getZoom = function() {
    return this.activeState.zoom
  }
  
  /**
   * Get zoom scale for pubilc usage
   *
   * @return {Float} zoom scale
   */
  ShadowViewport.prototype.getRelativeZoom = function() {
    return this.activeState.zoom / this.originalState.zoom
  }
  
  /**
   * Compute zoom scale for pubilc usage
   *
   * @return {Float} zoom scale
   */
  ShadowViewport.prototype.computeRelativeZoom = function(scale) {
    return scale / this.originalState.zoom
  }
  
  /**
   * Get pan
   *
   * @return {Object}
   */
  ShadowViewport.prototype.getPan = function() {
    return {x: this.activeState.x, y: this.activeState.y}
  }
  
  /**
   * Return cached viewport CTM value that can be safely modified
   *
   * @return {SVGMatrix}
   */
  ShadowViewport.prototype.getCTM = function() {
    var safeCTM = this.options.svg.createSVGMatrix()
  
    // Copy values manually as in FF they are not itterable
    safeCTM.a = this.activeState.zoom
    safeCTM.b = 0
    safeCTM.c = 0
    safeCTM.d = this.activeState.zoom
    safeCTM.e = this.activeState.x
    safeCTM.f = this.activeState.y
  
    return safeCTM
  }
  
  /**
   * Set a new CTM
   *
   * @param {SVGMatrix} newCTM
   */
  ShadowViewport.prototype.setCTM = function(newCTM) {
    var willZoom = this.isZoomDifferent(newCTM)
      , willPan = this.isPanDifferent(newCTM)
  
    if (willZoom || willPan) {
      // Before zoom
      if (willZoom) {
        // If returns false then cancel zooming
        if (this.options.beforeZoom(this.getRelativeZoom(), this.computeRelativeZoom(newCTM.a)) === false) {
          newCTM.a = newCTM.d = this.activeState.zoom
          willZoom = false
        }
      }
  
      // Before pan
      if (willPan) {
        var preventPan = this.options.beforePan(this.getPan(), {x: newCTM.e, y: newCTM.f})
            // If prevent pan is an object
          , preventPanX = false
          , preventPanY = false
  
        // If prevent pan is Boolean false
        if (preventPan === false) {
          // Set x and y same as before
          newCTM.e = this.getPan().x
          newCTM.f = this.getPan().y
  
          preventPanX = preventPanY = true
        } else if (Utils.isObject(preventPan)) {
          // Check for X axes attribute
          if (preventPan.x === false) {
            // Prevent panning on x axes
            newCTM.e = this.getPan().x
            preventPanX = true
          } else if (Utils.isNumber(preventPan.x)) {
            // Set a custom pan value
            newCTM.e = preventPan.x
          }
  
          // Check for Y axes attribute
          if (preventPan.y === false) {
            // Prevent panning on x axes
            newCTM.f = this.getPan().y
            preventPanY = true
          } else if (Utils.isNumber(preventPan.y)) {
            // Set a custom pan value
            newCTM.f = preventPan.y
          }
        }
  
        // Update willPan flag
        if (preventPanX && preventPanY) {
          willPan = false
        }
      }
  
      // Check again if should zoom or pan
      if (willZoom || willPan) {
        this.updateCache(newCTM)
  
        this.updateCTMOnNextFrame()
  
        // After callbacks
        if (willZoom) {this.options.onZoom(this.getRelativeZoom())}
        if (willPan) {this.options.onPan(this.getPan())}
      }
    }
  }
  
  ShadowViewport.prototype.isZoomDifferent = function(newCTM) {
    return this.activeState.zoom !== newCTM.a
  }
  
  ShadowViewport.prototype.isPanDifferent = function(newCTM) {
    return this.activeState.x !== newCTM.e || this.activeState.y !== newCTM.f
  }
  
  
  /**
   * Update cached CTM and active state
   *
   * @param {SVGMatrix} newCTM
   */
  ShadowViewport.prototype.updateCache = function(newCTM) {
    this.activeState.zoom = newCTM.a
    this.activeState.x = newCTM.e
    this.activeState.y = newCTM.f
  }
  
  ShadowViewport.prototype.pendingUpdate = false
  
  /**
   * Place a request to update CTM on next Frame
   */
  ShadowViewport.prototype.updateCTMOnNextFrame = function() {
    if (!this.pendingUpdate) {
      // Lock
      this.pendingUpdate = true
  
      // Throttle next update
      this.requestAnimationFrame.call(window, this.updateCTMCached)
    }
  }
  
  /**
   * Update viewport CTM with cached CTM
   */
  ShadowViewport.prototype.updateCTM = function() {
    // Updates SVG element
    SvgUtils.setCTM(this.viewport, this.getCTM(), this.defs)
  
    // Free the lock
    this.pendingUpdate = false
  }
  
  module.exports = function(viewport, options){
    return new ShadowViewport(viewport, options)
  }
  
  },{"./svg-utilities":5,"./utilities":7}],4:[function(require,module,exports){
  var Wheel = require('./uniwheel')
  , ControlIcons = require('./control-icons')
  , Utils = require('./utilities')
  , SvgUtils = require('./svg-utilities')
  , ShadowViewport = require('./shadow-viewport')
  
  var SvgPanZoom = function(svg, options) {
    this.init(svg, options)
  }
  
  var optionsDefaults = {
    viewportSelector: '.svg-pan-zoom_viewport' // Viewport selector. Can be querySelector string or SVGElement
  , panEnabled: true // enable or disable panning (default enabled)
  , controlIconsEnabled: false // insert icons to give user an option in addition to mouse events to control pan/zoom (default disabled)
  , zoomEnabled: true // enable or disable zooming (default enabled)
  , dblClickZoomEnabled: true // enable or disable zooming by double clicking (default enabled)
  , mouseWheelZoomEnabled: true // enable or disable zooming by mouse wheel (default enabled)
  , preventMouseEventsDefault: true // enable or disable preventDefault for mouse events
  , zoomScaleSensitivity: 0.1 // Zoom sensitivity
  , minZoom: 0.5 // Minimum Zoom level
  , maxZoom: 10 // Maximum Zoom level
  , fit: true // enable or disable viewport fit in SVG (default true)
  , contain: false // enable or disable viewport contain the svg (default false)
  , center: true // enable or disable viewport centering in SVG (default true)
  , refreshRate: 'auto' // Maximum number of frames per second (altering SVG's viewport)
  , beforeZoom: null
  , onZoom: null
  , beforePan: null
  , onPan: null
  , customEventsHandler: null
  }
  
  SvgPanZoom.prototype.init = function(svg, options) {
    var that = this
  
    this.svg = svg
    this.defs = svg.querySelector('defs')
  
    // Add default attributes to SVG
    SvgUtils.setupSvgAttributes(this.svg)
  
    // Set options
    this.options = Utils.extend(Utils.extend({}, optionsDefaults), options)
  
    // Set default state
    this.state = 'none'
  
    // Get dimensions
    var boundingClientRectNormalized = SvgUtils.getBoundingClientRectNormalized(svg)
    this.width = boundingClientRectNormalized.width
    this.height = boundingClientRectNormalized.height
  
    // Init shadow viewport
    this.viewport = ShadowViewport(SvgUtils.getOrCreateViewport(this.svg, this.options.viewportSelector), {
      svg: this.svg
    , width: this.width
    , height: this.height
    , fit: this.options.fit
    , contain: this.options.contain
    , center: this.options.center
    , refreshRate: this.options.refreshRate
    // Put callbacks into functions as they can change through time
    , beforeZoom: function(oldScale, newScale) {
        if (that.viewport && that.options.beforeZoom) {return that.options.beforeZoom(oldScale, newScale)}
      }
    , onZoom: function(scale) {
        if (that.viewport && that.options.onZoom) {return that.options.onZoom(scale)}
      }
    , beforePan: function(oldPoint, newPoint) {
        if (that.viewport && that.options.beforePan) {return that.options.beforePan(oldPoint, newPoint)}
      }
    , onPan: function(point) {
        if (that.viewport && that.options.onPan) {return that.options.onPan(point)}
      }
    })
  
    // Wrap callbacks into public API context
    var publicInstance = this.getPublicInstance()
    publicInstance.setBeforeZoom(this.options.beforeZoom)
    publicInstance.setOnZoom(this.options.onZoom)
    publicInstance.setBeforePan(this.options.beforePan)
    publicInstance.setOnPan(this.options.onPan)
  
    if (this.options.controlIconsEnabled) {
      ControlIcons.enable(this)
    }
  
    // Init events handlers
    this.lastMouseWheelEventTime = Date.now()
    this.setupHandlers()
  }
  
  /**
   * Register event handlers
   */
  SvgPanZoom.prototype.setupHandlers = function() {
    var that = this
      , prevEvt = null // use for touchstart event to detect double tap
      ;
  
    this.eventListeners = {
      // Mouse down group
      mousedown: function(evt) {
        return that.handleMouseDown(evt, null);
      }
    , touchstart: function(evt) {
        var result = that.handleMouseDown(evt, prevEvt);
        prevEvt = evt
        return result;
      }
  
      // Mouse up group
    , mouseup: function(evt) {
        return that.handleMouseUp(evt);
      }
    , touchend: function(evt) {
        return that.handleMouseUp(evt);
      }
  
      // Mouse move group
    , mousemove: function(evt) {
        return that.handleMouseMove(evt);
      }
    , touchmove: function(evt) {
        return that.handleMouseMove(evt);
      }
  
      // Mouse leave group
    , mouseleave: function(evt) {
        return that.handleMouseUp(evt);
      }
    , touchleave: function(evt) {
        return that.handleMouseUp(evt);
      }
    , touchcancel: function(evt) {
        return that.handleMouseUp(evt);
      }
    }
  
    // Init custom events handler if available
    if (this.options.customEventsHandler != null) { // jshint ignore:line
      this.options.customEventsHandler.init({
        svgElement: this.svg
      , instance: this.getPublicInstance()
      })
  
      // Custom event handler may halt builtin listeners
      var haltEventListeners = this.options.customEventsHandler.haltEventListeners
      if (haltEventListeners && haltEventListeners.length) {
        for (var i = haltEventListeners.length - 1; i >= 0; i--) {
          if (this.eventListeners.hasOwnProperty(haltEventListeners[i])) {
            delete this.eventListeners[haltEventListeners[i]]
          }
        }
      }
    }
  
    // Bind eventListeners
    for (var event in this.eventListeners) {
      this.svg.addEventListener(event, this.eventListeners[event], false)
    }
  
    // Zoom using mouse wheel
    if (this.options.mouseWheelZoomEnabled) {
      this.options.mouseWheelZoomEnabled = false // set to false as enable will set it back to true
      this.enableMouseWheelZoom()
    }
  }
  
  /**
   * Enable ability to zoom using mouse wheel
   */
  SvgPanZoom.prototype.enableMouseWheelZoom = function() {
    if (!this.options.mouseWheelZoomEnabled) {
      var that = this
  
      // Mouse wheel listener
      this.wheelListener = function(evt) {
        return that.handleMouseWheel(evt);
      }
  
      // Bind wheelListener
      Wheel.on(this.svg, this.wheelListener, false)
  
      this.options.mouseWheelZoomEnabled = true
    }
  }
  
  /**
   * Disable ability to zoom using mouse wheel
   */
  SvgPanZoom.prototype.disableMouseWheelZoom = function() {
    if (this.options.mouseWheelZoomEnabled) {
      Wheel.off(this.svg, this.wheelListener, false)
      this.options.mouseWheelZoomEnabled = false
    }
  }
  
  /**
   * Handle mouse wheel event
   *
   * @param  {Event} evt
   */
  SvgPanZoom.prototype.handleMouseWheel = function(evt) {
    if (!this.options.zoomEnabled || this.state !== 'none') {
      return;
    }
  
    if (this.options.preventMouseEventsDefault){
      if (evt.preventDefault) {
        evt.preventDefault();
      } else {
        evt.returnValue = false;
      }
    }
  
    // Default delta in case that deltaY is not available
    var delta = evt.deltaY || 1
      , timeDelta = Date.now() - this.lastMouseWheelEventTime
      , divider = 3 + Math.max(0, 30 - timeDelta)
  
    // Update cache
    this.lastMouseWheelEventTime = Date.now()
  
    // Make empirical adjustments for browsers that give deltaY in pixels (deltaMode=0)
    if ('deltaMode' in evt && evt.deltaMode === 0 && evt.wheelDelta) {
      delta = evt.deltaY === 0 ? 0 :  Math.abs(evt.wheelDelta) / evt.deltaY
    }
  
    delta = -0.3 < delta && delta < 0.3 ? delta : (delta > 0 ? 1 : -1) * Math.log(Math.abs(delta) + 10) / divider
  
    var inversedScreenCTM = this.svg.getScreenCTM().inverse()
      , relativeMousePoint = SvgUtils.getEventPoint(evt, this.svg).matrixTransform(inversedScreenCTM)
      , zoom = Math.pow(1 + this.options.zoomScaleSensitivity, (-1) * delta); // multiplying by neg. 1 so as to make zoom in/out behavior match Google maps behavior
  
    this.zoomAtPoint(zoom, relativeMousePoint)
  }
  
  /**
   * Zoom in at a SVG point
   *
   * @param  {SVGPoint} point
   * @param  {Float} zoomScale    Number representing how much to zoom
   * @param  {Boolean} zoomAbsolute Default false. If true, zoomScale is treated as an absolute value.
   *                                Otherwise, zoomScale is treated as a multiplied (e.g. 1.10 would zoom in 10%)
   */
  SvgPanZoom.prototype.zoomAtPoint = function(zoomScale, point, zoomAbsolute) {
    var originalState = this.viewport.getOriginalState()
  
    if (!zoomAbsolute) {
      // Fit zoomScale in set bounds
      if (this.getZoom() * zoomScale < this.options.minZoom * originalState.zoom) {
        zoomScale = (this.options.minZoom * originalState.zoom) / this.getZoom()
      } else if (this.getZoom() * zoomScale > this.options.maxZoom * originalState.zoom) {
        zoomScale = (this.options.maxZoom * originalState.zoom) / this.getZoom()
      }
    } else {
      // Fit zoomScale in set bounds
      zoomScale = Math.max(this.options.minZoom * originalState.zoom, Math.min(this.options.maxZoom * originalState.zoom, zoomScale))
      // Find relative scale to achieve desired scale
      zoomScale = zoomScale/this.getZoom()
    }
  
    var oldCTM = this.viewport.getCTM()
      , relativePoint = point.matrixTransform(oldCTM.inverse())
      , modifier = this.svg.createSVGMatrix().translate(relativePoint.x, relativePoint.y).scale(zoomScale).translate(-relativePoint.x, -relativePoint.y)
      , newCTM = oldCTM.multiply(modifier)
  
    if (newCTM.a !== oldCTM.a) {
      this.viewport.setCTM(newCTM)
    }
  }
  
  /**
   * Zoom at center point
   *
   * @param  {Float} scale
   * @param  {Boolean} absolute Marks zoom scale as relative or absolute
   */
  SvgPanZoom.prototype.zoom = function(scale, absolute) {
    this.zoomAtPoint(scale, SvgUtils.getSvgCenterPoint(this.svg, this.width, this.height), absolute)
  }
  
  /**
   * Zoom used by public instance
   *
   * @param  {Float} scale
   * @param  {Boolean} absolute Marks zoom scale as relative or absolute
   */
  SvgPanZoom.prototype.publicZoom = function(scale, absolute) {
    if (absolute) {
      scale = this.computeFromRelativeZoom(scale)
    }
  
    this.zoom(scale, absolute)
  }
  
  /**
   * Zoom at point used by public instance
   *
   * @param  {Float} scale
   * @param  {SVGPoint|Object} point    An object that has x and y attributes
   * @param  {Boolean} absolute Marks zoom scale as relative or absolute
   */
  SvgPanZoom.prototype.publicZoomAtPoint = function(scale, point, absolute) {
    if (absolute) {
      // Transform zoom into a relative value
      scale = this.computeFromRelativeZoom(scale)
    }
  
    // If not a SVGPoint but has x and y than create a SVGPoint
    if (Utils.getType(point) !== 'SVGPoint' && 'x' in point && 'y' in point) {
      point = SvgUtils.createSVGPoint(this.svg, point.x, point.y)
    } else {
      throw new Error('Given point is invalid')
      return
    }
  
    this.zoomAtPoint(scale, point, absolute)
  }
  
  /**
   * Get zoom scale
   *
   * @return {Float} zoom scale
   */
  SvgPanZoom.prototype.getZoom = function() {
    return this.viewport.getZoom()
  }
  
  /**
   * Get zoom scale for public usage
   *
   * @return {Float} zoom scale
   */
  SvgPanZoom.prototype.getRelativeZoom = function() {
    return this.viewport.getRelativeZoom()
  }
  
  /**
   * Compute actual zoom from public zoom
   *
   * @param  {Float} zoom
   * @return {Float} zoom scale
   */
  SvgPanZoom.prototype.computeFromRelativeZoom = function(zoom) {
    return zoom * this.viewport.getOriginalState().zoom
  }
  
  /**
   * Set zoom to initial state
   */
  SvgPanZoom.prototype.resetZoom = function() {
    var originalState = this.viewport.getOriginalState()
  
    this.zoom(originalState.zoom, true);
  }
  
  /**
   * Set pan to initial state
   */
  SvgPanZoom.prototype.resetPan = function() {
    this.pan(this.viewport.getOriginalState());
  }
  
  /**
   * Set pan and zoom to initial state
   */
  SvgPanZoom.prototype.reset = function() {
    this.resetZoom()
    this.resetPan()
  }
  
  /**
   * Handle double click event
   * See handleMouseDown() for alternate detection method
   *
   * @param {Event} evt
   */
  SvgPanZoom.prototype.handleDblClick = function(evt) {
    if (this.options.preventMouseEventsDefault) {
      if (evt.preventDefault) {
        evt.preventDefault()
      } else {
        evt.returnValue = false
      }
    }
  
    // Check if target was a control button
    if (this.options.controlIconsEnabled) {
      var targetClass = evt.target.getAttribute('class') || ''
      if (targetClass.indexOf('svg-pan-zoom-control') > -1) {
        return false
      }
    }
  
    var zoomFactor
  
    if (evt.shiftKey) {
      zoomFactor = 1/((1 + this.options.zoomScaleSensitivity) * 2) // zoom out when shift key pressed
    } else {
      zoomFactor = (1 + this.options.zoomScaleSensitivity) * 2
    }
  
    var point = SvgUtils.getEventPoint(evt, this.svg).matrixTransform(this.svg.getScreenCTM().inverse())
    this.zoomAtPoint(zoomFactor, point)
  }
  
  /**
   * Handle click event
   *
   * @param {Event} evt
   */
  SvgPanZoom.prototype.handleMouseDown = function(evt, prevEvt) {
    if (this.options.preventMouseEventsDefault) {
      if (evt.preventDefault) {
        evt.preventDefault()
      } else {
        evt.returnValue = false
      }
    }
  
    Utils.mouseAndTouchNormalize(evt, this.svg)
  
    // Double click detection; more consistent than ondblclick
    if (this.options.dblClickZoomEnabled && Utils.isDblClick(evt, prevEvt)){
      this.handleDblClick(evt)
    } else {
      // Pan mode
      this.state = 'pan'
      this.firstEventCTM = this.viewport.getCTM()
      this.stateOrigin = SvgUtils.getEventPoint(evt, this.svg).matrixTransform(this.firstEventCTM.inverse())
    }
  }
  
  /**
   * Handle mouse move event
   *
   * @param  {Event} evt
   */
  SvgPanZoom.prototype.handleMouseMove = function(evt) {
    if (this.options.preventMouseEventsDefault) {
      if (evt.preventDefault) {
        evt.preventDefault()
      } else {
        evt.returnValue = false
      }
    }
  
    if (this.state === 'pan' && this.options.panEnabled) {
      // Pan mode
      var point = SvgUtils.getEventPoint(evt, this.svg).matrixTransform(this.firstEventCTM.inverse())
        , viewportCTM = this.firstEventCTM.translate(point.x - this.stateOrigin.x, point.y - this.stateOrigin.y)
  
      this.viewport.setCTM(viewportCTM)
    }
  }
  
  /**
   * Handle mouse button release event
   *
   * @param {Event} evt
   */
  SvgPanZoom.prototype.handleMouseUp = function(evt) {
    if (this.options.preventMouseEventsDefault) {
      if (evt.preventDefault) {
        evt.preventDefault()
      } else {
        evt.returnValue = false
      }
    }
  
    if (this.state === 'pan') {
      // Quit pan mode
      this.state = 'none'
    }
  }
  
  /**
   * Adjust viewport size (only) so it will fit in SVG
   * Does not center image
   */
  SvgPanZoom.prototype.fit = function() {
    var viewBox = this.viewport.getViewBox()
      , newScale = Math.min(this.width/viewBox.width, this.height/viewBox.height)
  
    this.zoom(newScale, true)
  }
  
  /**
   * Adjust viewport size (only) so it will contain the SVG
   * Does not center image
   */
  SvgPanZoom.prototype.contain = function() {
    var viewBox = this.viewport.getViewBox()
      , newScale = Math.max(this.width/viewBox.width, this.height/viewBox.height)
  
    this.zoom(newScale, true)
  }
  
  /**
   * Adjust viewport pan (only) so it will be centered in SVG
   * Does not zoom/fit/contain image
   */
  SvgPanZoom.prototype.center = function() {
    var viewBox = this.viewport.getViewBox()
      , offsetX = (this.width - (viewBox.width + viewBox.x * 2) * this.getZoom()) * 0.5
      , offsetY = (this.height - (viewBox.height + viewBox.y * 2) * this.getZoom()) * 0.5
  
    this.getPublicInstance().pan({x: offsetX, y: offsetY})
  }
  
  /**
   * Update content cached BorderBox
   * Use when viewport contents change
   */
  SvgPanZoom.prototype.updateBBox = function() {
    this.viewport.recacheViewBox()
  }
  
  /**
   * Pan to a rendered position
   *
   * @param  {Object} point {x: 0, y: 0}
   */
  SvgPanZoom.prototype.pan = function(point) {
    var viewportCTM = this.viewport.getCTM()
    viewportCTM.e = point.x
    viewportCTM.f = point.y
    this.viewport.setCTM(viewportCTM)
  }
  
  /**
   * Relatively pan the graph by a specified rendered position vector
   *
   * @param  {Object} point {x: 0, y: 0}
   */
  SvgPanZoom.prototype.panBy = function(point) {
    var viewportCTM = this.viewport.getCTM()
    viewportCTM.e += point.x
    viewportCTM.f += point.y
    this.viewport.setCTM(viewportCTM)
  }
  
  /**
   * Get pan vector
   *
   * @return {Object} {x: 0, y: 0}
   */
  SvgPanZoom.prototype.getPan = function() {
    var state = this.viewport.getState()
  
    return {x: state.x, y: state.y}
  }
  
  /**
   * Recalculates cached svg dimensions and controls position
   */
  SvgPanZoom.prototype.resize = function() {
    // Get dimensions
    var boundingClientRectNormalized = SvgUtils.getBoundingClientRectNormalized(this.svg)
    this.width = boundingClientRectNormalized.width
    this.height = boundingClientRectNormalized.height
  
    // Reposition control icons by re-enabling them
    if (this.options.controlIconsEnabled) {
      this.getPublicInstance().disableControlIcons()
      this.getPublicInstance().enableControlIcons()
    }
  }
  
  /**
   * Unbind mouse events, free callbacks and destroy public instance
   */
  SvgPanZoom.prototype.destroy = function() {
    var that = this
  
    // Free callbacks
    this.beforeZoom = null
    this.onZoom = null
    this.beforePan = null
    this.onPan = null
  
    // Destroy custom event handlers
    if (this.options.customEventsHandler != null) { // jshint ignore:line
      this.options.customEventsHandler.destroy({
        svgElement: this.svg
      , instance: this.getPublicInstance()
      })
    }
  
    // Unbind eventListeners
    for (var event in this.eventListeners) {
      this.svg.removeEventListener(event, this.eventListeners[event], false)
    }
  
    // Unbind wheelListener
    this.disableMouseWheelZoom()
  
    // Remove control icons
    this.getPublicInstance().disableControlIcons()
  
    // Reset zoom and pan
    this.reset()
  
    // Remove instance from instancesStore
    instancesStore = instancesStore.filter(function(instance){
      return instance.svg !== that.svg
    })
  
    // Delete options and its contents
    delete this.options
  
    // Destroy public instance and rewrite getPublicInstance
    delete this.publicInstance
    delete this.pi
    this.getPublicInstance = function(){
      return null
    }
  }
  
  /**
   * Returns a public instance object
   *
   * @return {Object} Public instance object
   */
  SvgPanZoom.prototype.getPublicInstance = function() {
    var that = this
  
    // Create cache
    if (!this.publicInstance) {
      this.publicInstance = this.pi = {
        // Pan
        enablePan: function() {that.options.panEnabled = true; return that.pi}
      , disablePan: function() {that.options.panEnabled = false; return that.pi}
      , isPanEnabled: function() {return !!that.options.panEnabled}
      , pan: function(point) {that.pan(point); return that.pi}
      , panBy: function(point) {that.panBy(point); return that.pi}
      , getPan: function() {return that.getPan()}
        // Pan event
      , setBeforePan: function(fn) {that.options.beforePan = fn === null ? null : Utils.proxy(fn, that.publicInstance); return that.pi}
      , setOnPan: function(fn) {that.options.onPan = fn === null ? null : Utils.proxy(fn, that.publicInstance); return that.pi}
        // Zoom and Control Icons
      , enableZoom: function() {that.options.zoomEnabled = true; return that.pi}
      , disableZoom: function() {that.options.zoomEnabled = false; return that.pi}
      , isZoomEnabled: function() {return !!that.options.zoomEnabled}
      , enableControlIcons: function() {
          if (!that.options.controlIconsEnabled) {
            that.options.controlIconsEnabled = true
            ControlIcons.enable(that)
          }
          return that.pi
        }
      , disableControlIcons: function() {
          if (that.options.controlIconsEnabled) {
            that.options.controlIconsEnabled = false;
            ControlIcons.disable(that)
          }
          return that.pi
        }
      , isControlIconsEnabled: function() {return !!that.options.controlIconsEnabled}
        // Double click zoom
      , enableDblClickZoom: function() {that.options.dblClickZoomEnabled = true; return that.pi}
      , disableDblClickZoom: function() {that.options.dblClickZoomEnabled = false; return that.pi}
      , isDblClickZoomEnabled: function() {return !!that.options.dblClickZoomEnabled}
        // Mouse wheel zoom
      , enableMouseWheelZoom: function() {that.enableMouseWheelZoom(); return that.pi}
      , disableMouseWheelZoom: function() {that.disableMouseWheelZoom(); return that.pi}
      , isMouseWheelZoomEnabled: function() {return !!that.options.mouseWheelZoomEnabled}
        // Zoom scale and bounds
      , setZoomScaleSensitivity: function(scale) {that.options.zoomScaleSensitivity = scale; return that.pi}
      , setMinZoom: function(zoom) {that.options.minZoom = zoom; return that.pi}
      , setMaxZoom: function(zoom) {that.options.maxZoom = zoom; return that.pi}
        // Zoom event
      , setBeforeZoom: function(fn) {that.options.beforeZoom = fn === null ? null : Utils.proxy(fn, that.publicInstance); return that.pi}
      , setOnZoom: function(fn) {that.options.onZoom = fn === null ? null : Utils.proxy(fn, that.publicInstance); return that.pi}
        // Zooming
      , zoom: function(scale) {that.publicZoom(scale, true); return that.pi}
      , zoomBy: function(scale) {that.publicZoom(scale, false); return that.pi}
      , zoomAtPoint: function(scale, point) {that.publicZoomAtPoint(scale, point, true); return that.pi}
      , zoomAtPointBy: function(scale, point) {that.publicZoomAtPoint(scale, point, false); return that.pi}
      , zoomIn: function() {this.zoomBy(1 + that.options.zoomScaleSensitivity); return that.pi}
      , zoomOut: function() {this.zoomBy(1 / (1 + that.options.zoomScaleSensitivity)); return that.pi}
      , getZoom: function() {return that.getRelativeZoom()}
        // Reset
      , resetZoom: function() {that.resetZoom(); return that.pi}
      , resetPan: function() {that.resetPan(); return that.pi}
      , reset: function() {that.reset(); return that.pi}
        // Fit, Contain and Center
      , fit: function() {that.fit(); return that.pi}
      , contain: function() {that.contain(); return that.pi}
      , center: function() {that.center(); return that.pi}
        // Size and Resize
      , updateBBox: function() {that.updateBBox(); return that.pi}
      , resize: function() {that.resize(); return that.pi}
      , getSizes: function() {
          return {
            width: that.width
          , height: that.height
          , realZoom: that.getZoom()
          , viewBox: that.viewport.getViewBox()
          }
        }
        // Destroy
      , destroy: function() {that.destroy(); return that.pi}
      }
    }
  
    return this.publicInstance
  }
  
  /**
   * Stores pairs of instances of SvgPanZoom and SVG
   * Each pair is represented by an object {svg: SVGSVGElement, instance: SvgPanZoom}
   *
   * @type {Array}
   */
  var instancesStore = []
  
  var svgPanZoom = function(elementOrSelector, options){
    var svg = Utils.getSvg(elementOrSelector)
  
    if (svg === null) {
      return null
    } else {
      // Look for existent instance
      for(var i = instancesStore.length - 1; i >= 0; i--) {
        if (instancesStore[i].svg === svg) {
          return instancesStore[i].instance.getPublicInstance()
        }
      }
  
      // If instance not found - create one
      instancesStore.push({
        svg: svg
      , instance: new SvgPanZoom(svg, options)
      })
  
      // Return just pushed instance
      return instancesStore[instancesStore.length - 1].instance.getPublicInstance()
    }
  }
  
  module.exports = svgPanZoom;
  
  },{"./control-icons":2,"./shadow-viewport":3,"./svg-utilities":5,"./uniwheel":6,"./utilities":7}],5:[function(require,module,exports){
  var Utils = require('./utilities')
    , _browser = 'unknown'
    ;
  
  // http://stackoverflow.com/questions/9847580/how-to-detect-safari-chrome-ie-firefox-and-opera-browser
  if (/*@cc_on!@*/false || !!document.documentMode) { // internet explorer
    _browser = 'ie';
  }
  
  module.exports = {
    svgNS:  'http://www.w3.org/2000/svg'
  , xmlNS:  'http://www.w3.org/XML/1998/namespace'
  , xmlnsNS:  'http://www.w3.org/2000/xmlns/'
  , xlinkNS:  'http://www.w3.org/1999/xlink'
  , evNS:  'http://www.w3.org/2001/xml-events'
  
    /**
     * Get svg dimensions: width and height
     *
     * @param  {SVGSVGElement} svg
     * @return {Object}     {width: 0, height: 0}
     */
  , getBoundingClientRectNormalized: function(svg) {
      if (svg.clientWidth && svg.clientHeight) {
        return {width: svg.clientWidth, height: svg.clientHeight}
      } else if (!!svg.getBoundingClientRect()) {
        return svg.getBoundingClientRect();
      } else {
        throw new Error('Cannot get BoundingClientRect for SVG.');
      }
    }
  
    /**
     * Gets g element with class of "viewport" or creates it if it doesn't exist
     *
     * @param  {SVGSVGElement} svg
     * @return {SVGElement}     g (group) element
     */
  , getOrCreateViewport: function(svg, selector) {
      var viewport = null
  
      if (Utils.isElement(selector)) {
        viewport = selector
      } else {
        viewport = svg.querySelector(selector)
      }
  
      // Check if there is just one main group in SVG
      if (!viewport) {
        var childNodes = Array.prototype.slice.call(svg.childNodes || svg.children).filter(function(el){
          return el.nodeName !== 'defs' && el.nodeName !== '#text'
        })
  
        // Node name should be SVGGElement and should have no transform attribute
        // Groups with transform are not used as viewport because it involves parsing of all transform possibilities
        if (childNodes.length === 1 && childNodes[0].nodeName === 'g' && childNodes[0].getAttribute('transform') === null) {
          viewport = childNodes[0]
        }
      }
  
      // If no favorable group element exists then create one
      if (!viewport) {
        var viewportId = 'viewport-' + new Date().toISOString().replace(/\D/g, '');
        viewport = document.createElementNS(this.svgNS, 'g');
        viewport.setAttribute('id', viewportId);
  
        // Internet Explorer (all versions?) can't use childNodes, but other browsers prefer (require?) using childNodes
        var svgChildren = svg.childNodes || svg.children;
        if (!!svgChildren && svgChildren.length > 0) {
          for (var i = svgChildren.length; i > 0; i--) {
            // Move everything into viewport except defs
            if (svgChildren[svgChildren.length - i].nodeName !== 'defs') {
              viewport.appendChild(svgChildren[svgChildren.length - i]);
            }
          }
        }
        svg.appendChild(viewport);
      }
  
      // Parse class names
      var classNames = [];
      if (viewport.getAttribute('class')) {
        classNames = viewport.getAttribute('class').split(' ')
      }
  
      // Set class (if not set already)
      if (!~classNames.indexOf('svg-pan-zoom_viewport')) {
        classNames.push('svg-pan-zoom_viewport')
        viewport.setAttribute('class', classNames.join(' '))
      }
  
      return viewport
    }
  
    /**
     * Set SVG attributes
     *
     * @param  {SVGSVGElement} svg
     */
    , setupSvgAttributes: function(svg) {
      // Setting default attributes
      svg.setAttribute('xmlns', this.svgNS);
      svg.setAttributeNS(this.xmlnsNS, 'xmlns:xlink', this.xlinkNS);
      svg.setAttributeNS(this.xmlnsNS, 'xmlns:ev', this.evNS);
  
      // Needed for Internet Explorer, otherwise the viewport overflows
      if (svg.parentNode !== null) {
        var style = svg.getAttribute('style') || '';
        if (style.toLowerCase().indexOf('overflow') === -1) {
          svg.setAttribute('style', 'overflow: hidden; ' + style);
        }
      }
    }
  
  /**
   * How long Internet Explorer takes to finish updating its display (ms).
   */
  , internetExplorerRedisplayInterval: 300
  
  /**
   * Forces the browser to redisplay all SVG elements that rely on an
   * element defined in a 'defs' section. It works globally, for every
   * available defs element on the page.
   * The throttling is intentionally global.
   *
   * This is only needed for IE. It is as a hack to make markers (and 'use' elements?)
   * visible after pan/zoom when there are multiple SVGs on the page.
   * See bug report: https://connect.microsoft.com/IE/feedback/details/781964/
   * also see svg-pan-zoom issue: https://github.com/ariutta/svg-pan-zoom/issues/62
   */
  , refreshDefsGlobal: Utils.throttle(function() {
      var allDefs = document.querySelectorAll('defs');
      var allDefsCount = allDefs.length;
      for (var i = 0; i < allDefsCount; i++) {
        var thisDefs = allDefs[i];
        thisDefs.parentNode.insertBefore(thisDefs, thisDefs);
      }
    }, this.internetExplorerRedisplayInterval)
  
    /**
     * Sets the current transform matrix of an element
     *
     * @param {SVGElement} element
     * @param {SVGMatrix} matrix  CTM
     * @param {SVGElement} defs
     */
  , setCTM: function(element, matrix, defs) {
      var that = this
        , s = 'matrix(' + matrix.a + ',' + matrix.b + ',' + matrix.c + ',' + matrix.d + ',' + matrix.e + ',' + matrix.f + ')';
  
      element.setAttributeNS(null, 'transform', s);
  
      // IE has a bug that makes markers disappear on zoom (when the matrix "a" and/or "d" elements change)
      // see http://stackoverflow.com/questions/17654578/svg-marker-does-not-work-in-ie9-10
      // and http://srndolha.wordpress.com/2013/11/25/svg-line-markers-may-disappear-in-internet-explorer-11/
      if (_browser === 'ie' && !!defs) {
        // this refresh is intended for redisplaying the SVG during zooming
        defs.parentNode.insertBefore(defs, defs);
        // this refresh is intended for redisplaying the other SVGs on a page when panning a given SVG
        // it is also needed for the given SVG itself, on zoomEnd, if the SVG contains any markers that
        // are located under any other element(s).
        window.setTimeout(function() {
          that.refreshDefsGlobal();
        }, that.internetExplorerRedisplayInterval);
      }
    }
  
    /**
     * Instantiate an SVGPoint object with given event coordinates
     *
     * @param {Event} evt
     * @param  {SVGSVGElement} svg
     * @return {SVGPoint}     point
     */
  , getEventPoint: function(evt, svg) {
      var point = svg.createSVGPoint()
  
      Utils.mouseAndTouchNormalize(evt, svg)
  
      point.x = evt.clientX
      point.y = evt.clientY
  
      return point
    }
  
    /**
     * Get SVG center point
     *
     * @param  {SVGSVGElement} svg
     * @return {SVGPoint}
     */
  , getSvgCenterPoint: function(svg, width, height) {
      return this.createSVGPoint(svg, width / 2, height / 2)
    }
  
    /**
     * Create a SVGPoint with given x and y
     *
     * @param  {SVGSVGElement} svg
     * @param  {Number} x
     * @param  {Number} y
     * @return {SVGPoint}
     */
  , createSVGPoint: function(svg, x, y) {
      var point = svg.createSVGPoint()
      point.x = x
      point.y = y
  
      return point
    }
  }
  
  },{"./utilities":7}],6:[function(require,module,exports){
  // uniwheel 0.1.2 (customized)
  // A unified cross browser mouse wheel event handler
  // https://github.com/teemualap/uniwheel
  
  module.exports = (function(){
  
    //Full details: https://developer.mozilla.org/en-US/docs/Web/Reference/Events/wheel
  
    var prefix = "", _addEventListener, _removeEventListener, onwheel, support, fns = [];
  
    // detect event model
    if ( window.addEventListener ) {
      _addEventListener = "addEventListener";
      _removeEventListener = "removeEventListener";
    } else {
      _addEventListener = "attachEvent";
      _removeEventListener = "detachEvent";
      prefix = "on";
    }
  
    // detect available wheel event
    support = "onwheel" in document.createElement("div") ? "wheel" : // Modern browsers support "wheel"
              document.onmousewheel !== undefined ? "mousewheel" : // Webkit and IE support at least "mousewheel"
              "DOMMouseScroll"; // let's assume that remaining browsers are older Firefox
  
  
    function createCallback(element,callback,capture) {
  
      var fn = function(originalEvent) {
  
        !originalEvent && ( originalEvent = window.event );
  
        // create a normalized event object
        var event = {
          // keep a ref to the original event object
          originalEvent: originalEvent,
          target: originalEvent.target || originalEvent.srcElement,
          type: "wheel",
          deltaMode: originalEvent.type == "MozMousePixelScroll" ? 0 : 1,
          deltaX: 0,
          delatZ: 0,
          preventDefault: function() {
            originalEvent.preventDefault ?
              originalEvent.preventDefault() :
              originalEvent.returnValue = false;
          }
        };
  
        // calculate deltaY (and deltaX) according to the event
        if ( support == "mousewheel" ) {
          event.deltaY = - 1/40 * originalEvent.wheelDelta;
          // Webkit also support wheelDeltaX
          originalEvent.wheelDeltaX && ( event.deltaX = - 1/40 * originalEvent.wheelDeltaX );
        } else {
          event.deltaY = originalEvent.detail;
        }
  
        // it's time to fire the callback
        return callback( event );
  
      };
  
      fns.push({
        element: element,
        fn: fn,
        capture: capture
      });
  
      return fn;
    }
  
    function getCallback(element,capture) {
      for (var i = 0; i < fns.length; i++) {
        if (fns[i].element === element && fns[i].capture === capture) {
          return fns[i].fn;
        }
      }
      return function(){};
    }
  
    function removeCallback(element,capture) {
      for (var i = 0; i < fns.length; i++) {
        if (fns[i].element === element && fns[i].capture === capture) {
          return fns.splice(i,1);
        }
      }
    }
  
    function _addWheelListener( elem, eventName, callback, useCapture ) {
  
      var cb;
  
      if (support === "wheel") {
        cb = callback;
      } else {
        cb = createCallback(elem,callback,useCapture);
      }
  
      elem[ _addEventListener ]( prefix + eventName, cb, useCapture || false );
  
    }
  
    function _removeWheelListener( elem, eventName, callback, useCapture ) {
  
      if (support === "wheel") {
        cb = callback;
      } else {
        cb = getCallback(elem,useCapture);
      }
  
      elem[ _removeEventListener ]( prefix + eventName, cb, useCapture || false );
  
      removeCallback(elem,useCapture);
  
    }
  
    function addWheelListener( elem, callback, useCapture ) {
      _addWheelListener( elem, support, callback, useCapture );
  
      // handle MozMousePixelScroll in older Firefox
      if( support == "DOMMouseScroll" ) {
          _addWheelListener( elem, "MozMousePixelScroll", callback, useCapture);
      }
    }
  
    function removeWheelListener(elem,callback,useCapture){
      _removeWheelListener(elem,support,callback,useCapture);
  
      // handle MozMousePixelScroll in older Firefox
      if( support == "DOMMouseScroll" ) {
          _removeWheelListener(elem, "MozMousePixelScroll", callback, useCapture);
      }
    }
  
    return {
      on: addWheelListener,
      off: removeWheelListener
    };
  
  })();
  
  },{}],7:[function(require,module,exports){
  module.exports = {
    /**
     * Extends an object
     *
     * @param  {Object} target object to extend
     * @param  {Object} source object to take properties from
     * @return {Object}        extended object
     */
    extend: function(target, source) {
      target = target || {};
      for (var prop in source) {
        // Go recursively
        if (this.isObject(source[prop])) {
          target[prop] = this.extend(target[prop], source[prop])
        } else {
          target[prop] = source[prop]
        }
      }
      return target;
    }
  
    /**
     * Checks if an object is a DOM element
     *
     * @param  {Object}  o HTML element or String
     * @return {Boolean}   returns true if object is a DOM element
     */
  , isElement: function(o){
      return (
        o instanceof HTMLElement || o instanceof SVGElement || o instanceof SVGSVGElement || //DOM2
        (o && typeof o === 'object' && o !== null && o.nodeType === 1 && typeof o.nodeName === 'string')
      );
    }
  
    /**
     * Checks if an object is an Object
     *
     * @param  {Object}  o Object
     * @return {Boolean}   returns true if object is an Object
     */
  , isObject: function(o){
      return Object.prototype.toString.call(o) === '[object Object]';
    }
  
    /**
     * Checks if variable is Number
     *
     * @param  {Integer|Float}  n
     * @return {Boolean}   returns true if variable is Number
     */
  , isNumber: function(n) {
      return !isNaN(parseFloat(n)) && isFinite(n);
    }
  
    /**
     * Search for an SVG element
     *
     * @param  {Object|String} elementOrSelector DOM Element or selector String
     * @return {Object|Null}                   SVG or null
     */
  , getSvg: function(elementOrSelector) {
      var element
        , svg;
  
      if (!this.isElement(elementOrSelector)) {
        // If selector provided
        if (typeof elementOrSelector === 'string' || elementOrSelector instanceof String) {
          // Try to find the element
          element = document.querySelector(elementOrSelector)
  
          if (!element) {
            throw new Error('Provided selector did not find any elements. Selector: ' + elementOrSelector)
            return null
          }
        } else {
          throw new Error('Provided selector is not an HTML object nor String')
          return null
        }
      } else {
        element = elementOrSelector
      }
  
      if (element.tagName.toLowerCase() === 'svg') {
        svg = element;
      } else {
        if (element.tagName.toLowerCase() === 'object') {
          svg = element.contentDocument.documentElement;
        } else {
          if (element.tagName.toLowerCase() === 'embed') {
            svg = element.getSVGDocument().documentElement;
          } else {
            if (element.tagName.toLowerCase() === 'img') {
              throw new Error('Cannot script an SVG in an "img" element. Please use an "object" element or an in-line SVG.');
            } else {
              throw new Error('Cannot get SVG.');
            }
            return null
          }
        }
      }
  
      return svg
    }
  
    /**
     * Attach a given context to a function
     * @param  {Function} fn      Function
     * @param  {Object}   context Context
     * @return {Function}           Function with certain context
     */
  , proxy: function(fn, context) {
      return function() {
        return fn.apply(context, arguments)
      }
    }
  
    /**
     * Returns object type
     * Uses toString that returns [object SVGPoint]
     * And than parses object type from string
     *
     * @param  {Object} o Any object
     * @return {String}   Object type
     */
  , getType: function(o) {
      return Object.prototype.toString.apply(o).replace(/^\[object\s/, '').replace(/\]$/, '')
    }
  
    /**
     * If it is a touch event than add clientX and clientY to event object
     *
     * @param  {Event} evt
     * @param  {SVGSVGElement} svg
     */
  , mouseAndTouchNormalize: function(evt, svg) {
      // If no cilentX and but touch objects are available
      if (evt.clientX === void 0 || evt.clientX === null) {
        // Fallback
        evt.clientX = 0
        evt.clientY = 0
  
        // If it is a touch event
        if (evt.changedTouches !== void 0 && evt.changedTouches.length) {
          // If touch event has changedTouches
          if (evt.changedTouches[0].clientX !== void 0) {
            evt.clientX = evt.changedTouches[0].clientX
            evt.clientY = evt.changedTouches[0].clientY
          }
          // If changedTouches has pageX attribute
          else if (evt.changedTouches[0].pageX !== void 0) {
            var rect = svg.getBoundingClientRect();
  
            evt.clientX = evt.changedTouches[0].pageX - rect.left
            evt.clientY = evt.changedTouches[0].pageY - rect.top
          }
        // If it is a custom event
        } else if (evt.originalEvent !== void 0) {
          if (evt.originalEvent.clientX !== void 0) {
            evt.clientX = evt.originalEvent.clientX
            evt.clientY = evt.originalEvent.clientY
          }
        }
      }
    }
  
    /**
     * Check if an event is a double click/tap
     * TODO: For touch gestures use a library (hammer.js) that takes in account other events
     * (touchmove and touchend). It should take in account tap duration and traveled distance
     *
     * @param  {Event}  evt
     * @param  {Event}  prevEvt Previous Event
     * @return {Boolean}
     */
  , isDblClick: function(evt, prevEvt) {
      // Double click detected by browser
      if (evt.detail === 2) {
        return true;
      }
      // Try to compare events
      else if (prevEvt !== void 0 && prevEvt !== null) {
        var timeStampDiff = evt.timeStamp - prevEvt.timeStamp // should be lower than 250 ms
          , touchesDistance = Math.sqrt(Math.pow(evt.clientX - prevEvt.clientX, 2) + Math.pow(evt.clientY - prevEvt.clientY, 2))
  
        return timeStampDiff < 250 && touchesDistance < 10
      }
  
      // Nothing found
      return false;
    }
  
    /**
     * Returns current timestamp as an integer
     *
     * @return {Number}
     */
  , now: Date.now || function() {
      return new Date().getTime();
    }
  
    // From underscore.
    // Returns a function, that, when invoked, will only be triggered at most once
    // during a given window of time. Normally, the throttled function will run
    // as much as it can, without ever going more than once per `wait` duration;
    // but if you'd like to disable the execution on the leading edge, pass
    // `{leading: false}`. To disable execution on the trailing edge, ditto.
  // jscs:disable
  // jshint ignore:start
  , throttle: function(func, wait, options) {
      var that = this;
      var context, args, result;
      var timeout = null;
      var previous = 0;
      if (!options) options = {};
      var later = function() {
        previous = options.leading === false ? 0 : that.now();
        timeout = null;
        result = func.apply(context, args);
        if (!timeout) context = args = null;
      };
      return function() {
        var now = that.now();
        if (!previous && options.leading === false) previous = now;
        var remaining = wait - (now - previous);
        context = this;
        args = arguments;
        if (remaining <= 0 || remaining > wait) {
          clearTimeout(timeout);
          timeout = null;
          previous = now;
          result = func.apply(context, args);
          if (!timeout) context = args = null;
        } else if (!timeout && options.trailing !== false) {
          timeout = setTimeout(later, remaining);
        }
        return result;
      };
    }
  // jshint ignore:end
  // jscs:enable
  
    /**
     * Create a requestAnimationFrame simulation
     *
     * @param  {Number|String} refreshRate
     * @return {Function}
     */
  , createRequestAnimationFrame: function(refreshRate) {
      var timeout = null
  
      // Convert refreshRate to timeout
      if (refreshRate !== 'auto' && refreshRate < 60 && refreshRate > 1) {
        timeout = Math.floor(1000 / refreshRate)
      }
  
      if (timeout === null) {
        return window.requestAnimationFrame || requestTimeout(33)
      } else {
        return requestTimeout(timeout)
      }
    }
  }
  
  /**
   * Create a callback that will execute after a given timeout
   *
   * @param  {Function} timeout
   * @return {Function}
   */
  function requestTimeout(timeout) {
    return function(callback) {
      window.setTimeout(callback, timeout)
    }
  }
  
  },{}]},{},[1]);
  