react-design-editor/dist/react-design-editor.js

Design Editor Tools with React.js + ant.design + fabric.js

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/* 0 */
/***/ (function(module, exports) {

/**
 * @module zrender/core/util
 */
// 用于处理merge时无法遍历Date等对象的问题
var BUILTIN_OBJECT = {
  '[object Function]': 1,
  '[object RegExp]': 1,
  '[object Date]': 1,
  '[object Error]': 1,
  '[object CanvasGradient]': 1,
  '[object CanvasPattern]': 1,
  // For node-canvas
  '[object Image]': 1,
  '[object Canvas]': 1
};
var TYPED_ARRAY = {
  '[object Int8Array]': 1,
  '[object Uint8Array]': 1,
  '[object Uint8ClampedArray]': 1,
  '[object Int16Array]': 1,
  '[object Uint16Array]': 1,
  '[object Int32Array]': 1,
  '[object Uint32Array]': 1,
  '[object Float32Array]': 1,
  '[object Float64Array]': 1
};
var objToString = Object.prototype.toString;
var arrayProto = Array.prototype;
var nativeForEach = arrayProto.forEach;
var nativeFilter = arrayProto.filter;
var nativeSlice = arrayProto.slice;
var nativeMap = arrayProto.map;
var nativeReduce = arrayProto.reduce; // Avoid assign to an exported variable, for transforming to cjs.

var methods = {};

function $override(name, fn) {
  // Clear ctx instance for different environment
  if (name === 'createCanvas') {
    _ctx = null;
  }

  methods[name] = fn;
}
/**
 * Those data types can be cloned:
 *     Plain object, Array, TypedArray, number, string, null, undefined.
 * Those data types will be assgined using the orginal data:
 *     BUILTIN_OBJECT
 * Instance of user defined class will be cloned to a plain object, without
 * properties in prototype.
 * Other data types is not supported (not sure what will happen).
 *
 * Caution: do not support clone Date, for performance consideration.
 * (There might be a large number of date in `series.data`).
 * So date should not be modified in and out of echarts.
 *
 * @param {*} source
 * @return {*} new
 */


function clone(source) {
  if (source == null || typeof source !== 'object') {
    return source;
  }

  var result = source;
  var typeStr = objToString.call(source);

  if (typeStr === '[object Array]') {
    if (!isPrimitive(source)) {
      result = [];

      for (var i = 0, len = source.length; i < len; i++) {
        result[i] = clone(source[i]);
      }
    }
  } else if (TYPED_ARRAY[typeStr]) {
    if (!isPrimitive(source)) {
      var Ctor = source.constructor;

      if (source.constructor.from) {
        result = Ctor.from(source);
      } else {
        result = new Ctor(source.length);

        for (var i = 0, len = source.length; i < len; i++) {
          result[i] = clone(source[i]);
        }
      }
    }
  } else if (!BUILTIN_OBJECT[typeStr] && !isPrimitive(source) && !isDom(source)) {
    result = {};

    for (var key in source) {
      if (source.hasOwnProperty(key)) {
        result[key] = clone(source[key]);
      }
    }
  }

  return result;
}
/**
 * @memberOf module:zrender/core/util
 * @param {*} target
 * @param {*} source
 * @param {boolean} [overwrite=false]
 */


function merge(target, source, overwrite) {
  // We should escapse that source is string
  // and enter for ... in ...
  if (!isObject(source) || !isObject(target)) {
    return overwrite ? clone(source) : target;
  }

  for (var key in source) {
    if (source.hasOwnProperty(key)) {
      var targetProp = target[key];
      var sourceProp = source[key];

      if (isObject(sourceProp) && isObject(targetProp) && !isArray(sourceProp) && !isArray(targetProp) && !isDom(sourceProp) && !isDom(targetProp) && !isBuiltInObject(sourceProp) && !isBuiltInObject(targetProp) && !isPrimitive(sourceProp) && !isPrimitive(targetProp)) {
        // 如果需要递归覆盖，就递归调用merge
        merge(targetProp, sourceProp, overwrite);
      } else if (overwrite || !(key in target)) {
        // 否则只处理overwrite为true，或者在目标对象中没有此属性的情况
        // NOTE，在 target[key] 不存在的时候也是直接覆盖
        target[key] = clone(source[key], true);
      }
    }
  }

  return target;
}
/**
 * @param {Array} targetAndSources The first item is target, and the rests are source.
 * @param {boolean} [overwrite=false]
 * @return {*} target
 */


function mergeAll(targetAndSources, overwrite) {
  var result = targetAndSources[0];

  for (var i = 1, len = targetAndSources.length; i < len; i++) {
    result = merge(result, targetAndSources[i], overwrite);
  }

  return result;
}
/**
 * @param {*} target
 * @param {*} source
 * @memberOf module:zrender/core/util
 */


function extend(target, source) {
  for (var key in source) {
    if (source.hasOwnProperty(key)) {
      target[key] = source[key];
    }
  }

  return target;
}
/**
 * @param {*} target
 * @param {*} source
 * @param {boolean} [overlay=false]
 * @memberOf module:zrender/core/util
 */


function defaults(target, source, overlay) {
  for (var key in source) {
    if (source.hasOwnProperty(key) && (overlay ? source[key] != null : target[key] == null)) {
      target[key] = source[key];
    }
  }

  return target;
}

var createCanvas = function () {
  return methods.createCanvas();
};

methods.createCanvas = function () {
  return document.createElement('canvas');
}; // FIXME


var _ctx;

function getContext() {
  if (!_ctx) {
    // Use util.createCanvas instead of createCanvas
    // because createCanvas may be overwritten in different environment
    _ctx = createCanvas().getContext('2d');
  }

  return _ctx;
}
/**
 * 查询数组中元素的index
 * @memberOf module:zrender/core/util
 */


function indexOf(array, value) {
  if (array) {
    if (array.indexOf) {
      return array.indexOf(value);
    }

    for (var i = 0, len = array.length; i < len; i++) {
      if (array[i] === value) {
        return i;
      }
    }
  }

  return -1;
}
/**
 * 构造类继承关系
 *
 * @memberOf module:zrender/core/util
 * @param {Function} clazz 源类
 * @param {Function} baseClazz 基类
 */


function inherits(clazz, baseClazz) {
  var clazzPrototype = clazz.prototype;

  function F() {}

  F.prototype = baseClazz.prototype;
  clazz.prototype = new F();

  for (var prop in clazzPrototype) {
    if (clazzPrototype.hasOwnProperty(prop)) {
      clazz.prototype[prop] = clazzPrototype[prop];
    }
  }

  clazz.prototype.constructor = clazz;
  clazz.superClass = baseClazz;
}
/**
 * @memberOf module:zrender/core/util
 * @param {Object|Function} target
 * @param {Object|Function} sorce
 * @param {boolean} overlay
 */


function mixin(target, source, overlay) {
  target = 'prototype' in target ? target.prototype : target;
  source = 'prototype' in source ? source.prototype : source;
  defaults(target, source, overlay);
}
/**
 * Consider typed array.
 * @param {Array|TypedArray} data
 */


function isArrayLike(data) {
  if (!data) {
    return;
  }

  if (typeof data === 'string') {
    return false;
  }

  return typeof data.length === 'number';
}
/**
 * 数组或对象遍历
 * @memberOf module:zrender/core/util
 * @param {Object|Array} obj
 * @param {Function} cb
 * @param {*} [context]
 */


function each(obj, cb, context) {
  if (!(obj && cb)) {
    return;
  }

  if (obj.forEach && obj.forEach === nativeForEach) {
    obj.forEach(cb, context);
  } else if (obj.length === +obj.length) {
    for (var i = 0, len = obj.length; i < len; i++) {
      cb.call(context, obj[i], i, obj);
    }
  } else {
    for (var key in obj) {
      if (obj.hasOwnProperty(key)) {
        cb.call(context, obj[key], key, obj);
      }
    }
  }
}
/**
 * 数组映射
 * @memberOf module:zrender/core/util
 * @param {Array} obj
 * @param {Function} cb
 * @param {*} [context]
 * @return {Array}
 */


function map(obj, cb, context) {
  if (!(obj && cb)) {
    return;
  }

  if (obj.map && obj.map === nativeMap) {
    return obj.map(cb, context);
  } else {
    var result = [];

    for (var i = 0, len = obj.length; i < len; i++) {
      result.push(cb.call(context, obj[i], i, obj));
    }

    return result;
  }
}
/**
 * @memberOf module:zrender/core/util
 * @param {Array} obj
 * @param {Function} cb
 * @param {Object} [memo]
 * @param {*} [context]
 * @return {Array}
 */


function reduce(obj, cb, memo, context) {
  if (!(obj && cb)) {
    return;
  }

  if (obj.reduce && obj.reduce === nativeReduce) {
    return obj.reduce(cb, memo, context);
  } else {
    for (var i = 0, len = obj.length; i < len; i++) {
      memo = cb.call(context, memo, obj[i], i, obj);
    }

    return memo;
  }
}
/**
 * 数组过滤
 * @memberOf module:zrender/core/util
 * @param {Array} obj
 * @param {Function} cb
 * @param {*} [context]
 * @return {Array}
 */


function filter(obj, cb, context) {
  if (!(obj && cb)) {
    return;
  }

  if (obj.filter && obj.filter === nativeFilter) {
    return obj.filter(cb, context);
  } else {
    var result = [];

    for (var i = 0, len = obj.length; i < len; i++) {
      if (cb.call(context, obj[i], i, obj)) {
        result.push(obj[i]);
      }
    }

    return result;
  }
}
/**
 * 数组项查找
 * @memberOf module:zrender/core/util
 * @param {Array} obj
 * @param {Function} cb
 * @param {*} [context]
 * @return {*}
 */


function find(obj, cb, context) {
  if (!(obj && cb)) {
    return;
  }

  for (var i = 0, len = obj.length; i < len; i++) {
    if (cb.call(context, obj[i], i, obj)) {
      return obj[i];
    }
  }
}
/**
 * @memberOf module:zrender/core/util
 * @param {Function} func
 * @param {*} context
 * @return {Function}
 */


function bind(func, context) {
  var args = nativeSlice.call(arguments, 2);
  return function () {
    return func.apply(context, args.concat(nativeSlice.call(arguments)));
  };
}
/**
 * @memberOf module:zrender/core/util
 * @param {Function} func
 * @return {Function}
 */


function curry(func) {
  var args = nativeSlice.call(arguments, 1);
  return function () {
    return func.apply(this, args.concat(nativeSlice.call(arguments)));
  };
}
/**
 * @memberOf module:zrender/core/util
 * @param {*} value
 * @return {boolean}
 */


function isArray(value) {
  return objToString.call(value) === '[object Array]';
}
/**
 * @memberOf module:zrender/core/util
 * @param {*} value
 * @return {boolean}
 */


function isFunction(value) {
  return typeof value === 'function';
}
/**
 * @memberOf module:zrender/core/util
 * @param {*} value
 * @return {boolean}
 */


function isString(value) {
  return objToString.call(value) === '[object String]';
}
/**
 * @memberOf module:zrender/core/util
 * @param {*} value
 * @return {boolean}
 */


function isObject(value) {
  // Avoid a V8 JIT bug in Chrome 19-20.
  // See https://code.google.com/p/v8/issues/detail?id=2291 for more details.
  var type = typeof value;
  return type === 'function' || !!value && type === 'object';
}
/**
 * @memberOf module:zrender/core/util
 * @param {*} value
 * @return {boolean}
 */


function isBuiltInObject(value) {
  return !!BUILTIN_OBJECT[objToString.call(value)];
}
/**
 * @memberOf module:zrender/core/util
 * @param {*} value
 * @return {boolean}
 */


function isTypedArray(value) {
  return !!TYPED_ARRAY[objToString.call(value)];
}
/**
 * @memberOf module:zrender/core/util
 * @param {*} value
 * @return {boolean}
 */


function isDom(value) {
  return typeof value === 'object' && typeof value.nodeType === 'number' && typeof value.ownerDocument === 'object';
}
/**
 * Whether is exactly NaN. Notice isNaN('a') returns true.
 * @param {*} value
 * @return {boolean}
 */


function eqNaN(value) {
  /* eslint-disable-next-line no-self-compare */
  return value !== value;
}
/**
 * If value1 is not null, then return value1, otherwise judget rest of values.
 * Low performance.
 * @memberOf module:zrender/core/util
 * @return {*} Final value
 */


function retrieve(values) {
  for (var i = 0, len = arguments.length; i < len; i++) {
    if (arguments[i] != null) {
      return arguments[i];
    }
  }
}

function retrieve2(value0, value1) {
  return value0 != null ? value0 : value1;
}

function retrieve3(value0, value1, value2) {
  return value0 != null ? value0 : value1 != null ? value1 : value2;
}
/**
 * @memberOf module:zrender/core/util
 * @param {Array} arr
 * @param {number} startIndex
 * @param {number} endIndex
 * @return {Array}
 */


function slice() {
  return Function.call.apply(nativeSlice, arguments);
}
/**
 * Normalize css liked array configuration
 * e.g.
 *  3 => [3, 3, 3, 3]
 *  [4, 2] => [4, 2, 4, 2]
 *  [4, 3, 2] => [4, 3, 2, 3]
 * @param {number|Array.<number>} val
 * @return {Array.<number>}
 */


function normalizeCssArray(val) {
  if (typeof val === 'number') {
    return [val, val, val, val];
  }

  var len = val.length;

  if (len === 2) {
    // vertical | horizontal
    return [val[0], val[1], val[0], val[1]];
  } else if (len === 3) {
    // top | horizontal | bottom
    return [val[0], val[1], val[2], val[1]];
  }

  return val;
}
/**
 * @memberOf module:zrender/core/util
 * @param {boolean} condition
 * @param {string} message
 */


function assert(condition, message) {
  if (!condition) {
    throw new Error(message);
  }
}
/**
 * @memberOf module:zrender/core/util
 * @param {string} str string to be trimed
 * @return {string} trimed string
 */


function trim(str) {
  if (str == null) {
    return null;
  } else if (typeof str.trim === 'function') {
    return str.trim();
  } else {
    return str.replace(/^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g, '');
  }
}

var primitiveKey = '__ec_primitive__';
/**
 * Set an object as primitive to be ignored traversing children in clone or merge
 */

function setAsPrimitive(obj) {
  obj[primitiveKey] = true;
}

function isPrimitive(obj) {
  return obj[primitiveKey];
}
/**
 * @constructor
 * @param {Object} obj Only apply `ownProperty`.
 */


function HashMap(obj) {
  var isArr = isArray(obj); // Key should not be set on this, otherwise
  // methods get/set/... may be overrided.

  this.data = {};
  var thisMap = this;
  obj instanceof HashMap ? obj.each(visit) : obj && each(obj, visit);

  function visit(value, key) {
    isArr ? thisMap.set(value, key) : thisMap.set(key, value);
  }
}

HashMap.prototype = {
  constructor: HashMap,
  // Do not provide `has` method to avoid defining what is `has`.
  // (We usually treat `null` and `undefined` as the same, different
  // from ES6 Map).
  get: function (key) {
    return this.data.hasOwnProperty(key) ? this.data[key] : null;
  },
  set: function (key, value) {
    // Comparing with invocation chaining, `return value` is more commonly
    // used in this case: `var someVal = map.set('a', genVal());`
    return this.data[key] = value;
  },
  // Although util.each can be performed on this hashMap directly, user
  // should not use the exposed keys, who are prefixed.
  each: function (cb, context) {
    context !== void 0 && (cb = bind(cb, context));
    /* eslint-disable guard-for-in */

    for (var key in this.data) {
      this.data.hasOwnProperty(key) && cb(this.data[key], key);
    }
    /* eslint-enable guard-for-in */

  },
  // Do not use this method if performance sensitive.
  removeKey: function (key) {
    delete this.data[key];
  }
};

function createHashMap(obj) {
  return new HashMap(obj);
}

function concatArray(a, b) {
  var newArray = new a.constructor(a.length + b.length);

  for (var i = 0; i < a.length; i++) {
    newArray[i] = a[i];
  }

  var offset = a.length;

  for (i = 0; i < b.length; i++) {
    newArray[i + offset] = b[i];
  }

  return newArray;
}

function noop() {}

exports.$override = $override;
exports.clone = clone;
exports.merge = merge;
exports.mergeAll = mergeAll;
exports.extend = extend;
exports.defaults = defaults;
exports.createCanvas = createCanvas;
exports.getContext = getContext;
exports.indexOf = indexOf;
exports.inherits = inherits;
exports.mixin = mixin;
exports.isArrayLike = isArrayLike;
exports.each = each;
exports.map = map;
exports.reduce = reduce;
exports.filter = filter;
exports.find = find;
exports.bind = bind;
exports.curry = curry;
exports.isArray = isArray;
exports.isFunction = isFunction;
exports.isString = isString;
exports.isObject = isObject;
exports.isBuiltInObject = isBuiltInObject;
exports.isTypedArray = isTypedArray;
exports.isDom = isDom;
exports.eqNaN = eqNaN;
exports.retrieve = retrieve;
exports.retrieve2 = retrieve2;
exports.retrieve3 = retrieve3;
exports.slice = slice;
exports.normalizeCssArray = normalizeCssArray;
exports.assert = assert;
exports.trim = trim;
exports.setAsPrimitive = setAsPrimitive;
exports.isPrimitive = isPrimitive;
exports.createHashMap = createHashMap;
exports.concatArray = concatArray;
exports.noop = noop;

/***/ }),
/* 1 */
/***/ (function(module, exports, __webpack_require__) {

var global = __webpack_require__(7);
var getOwnPropertyDescriptor = __webpack_require__(49).f;
var createNonEnumerableProperty = __webpack_require__(53);
var defineBuiltIn = __webpack_require__(31);
var defineGlobalProperty = __webpack_require__(257);
var copyConstructorProperties = __webpack_require__(199);
var isForced = __webpack_require__(158);

/*
  options.target         - name of the target object
  options.global         - target is the global object
  options.stat           - export as static methods of target
  options.proto          - export as prototype methods of target
  options.real           - real prototype method for the `pure` version
  options.forced         - export even if the native feature is available
  options.bind           - bind methods to the target, required for the `pure` version
  options.wrap           - wrap constructors to preventing global pollution, required for the `pure` version
  options.unsafe         - use the simple assignment of property instead of delete + defineProperty
  options.sham           - add a flag to not completely full polyfills
  options.enumerable     - export as enumerable property
  options.dontCallGetSet - prevent calling a getter on target
  options.name           - the .name of the function if it does not match the key
*/
module.exports = function (options, source) {
  var TARGET = options.target;
  var GLOBAL = options.global;
  var STATIC = options.stat;
  var FORCED, target, key, targetProperty, sourceProperty, descriptor;
  if (GLOBAL) {
    target = global;
  } else if (STATIC) {
    target = global[TARGET] || defineGlobalProperty(TARGET, {});
  } else {
    target = (global[TARGET] || {}).prototype;
  }
  if (target) for (key in source) {
    sourceProperty = source[key];
    if (options.dontCallGetSet) {
      descriptor = getOwnPropertyDescriptor(target, key);
      targetProperty = descriptor && descriptor.value;
    } else targetProperty = target[key];
    FORCED = isForced(GLOBAL ? key : TARGET + (STATIC ? '.' : '#') + key, options.forced);
    // contained in target
    if (!FORCED && targetProperty !== undefined) {
      if (typeof sourceProperty == typeof targetProperty) continue;
      copyConstructorProperties(sourceProperty, targetProperty);
    }
    // add a flag to not completely full polyfills
    if (options.sham || (targetProperty && targetProperty.sham)) {
      createNonEnumerableProperty(sourceProperty, 'sham', true);
    }
    defineBuiltIn(target, key, sourceProperty, options);
  }
};


/***/ }),
/* 2 */
/***/ (function(module, exports, __webpack_require__) {

/* WEBPACK VAR INJECTION */(function(Buffer) {/* build: `node build.js modules=ALL exclude=gestures,accessors,erasing requirejs minifier=uglifyjs` */
/*! Fabric.js Copyright 2008-2015, Printio (Juriy Zaytsev, Maxim Chernyak) */

var fabric = fabric || { version: '4.6.0' };
if (true) {
  exports.fabric = fabric;
}
/* _AMD_START_ */
else {}
/* _AMD_END_ */
if (typeof document !== 'undefined' && typeof window !== 'undefined') {
  if (document instanceof (typeof HTMLDocument !== 'undefined' ? HTMLDocument : Document)) {
    fabric.document = document;
  }
  else {
    fabric.document = document.implementation.createHTMLDocument('');
  }
  fabric.window = window;
}
else {
  // assume we're running under node.js when document/window are not present
  var jsdom = __webpack_require__(762);
  var virtualWindow = new jsdom.JSDOM(
    decodeURIComponent('%3C!DOCTYPE%20html%3E%3Chtml%3E%3Chead%3E%3C%2Fhead%3E%3Cbody%3E%3C%2Fbody%3E%3C%2Fhtml%3E'),
    {
      features: {
        FetchExternalResources: ['img']
      },
      resources: 'usable'
    }).window;
  fabric.document = virtualWindow.document;
  fabric.jsdomImplForWrapper = __webpack_require__(763).implForWrapper;
  fabric.nodeCanvas = __webpack_require__(764).Canvas;
  fabric.window = virtualWindow;
  DOMParser = fabric.window.DOMParser;
}

/**
 * True when in environment that supports touch events
 * @type boolean
 */
fabric.isTouchSupported = 'ontouchstart' in fabric.window || 'ontouchstart' in fabric.document ||
  (fabric.window && fabric.window.navigator && fabric.window.navigator.maxTouchPoints > 0);

/**
 * True when in environment that's probably Node.js
 * @type boolean
 */
fabric.isLikelyNode = typeof Buffer !== 'undefined' &&
                      typeof window === 'undefined';

/* _FROM_SVG_START_ */
/**
 * Attributes parsed from all SVG elements
 * @type array
 */
fabric.SHARED_ATTRIBUTES = [
  'display',
  'transform',
  'fill', 'fill-opacity', 'fill-rule',
  'opacity',
  'stroke', 'stroke-dasharray', 'stroke-linecap', 'stroke-dashoffset',
  'stroke-linejoin', 'stroke-miterlimit',
  'stroke-opacity', 'stroke-width',
  'id', 'paint-order', 'vector-effect',
  'instantiated_by_use', 'clip-path',
];
/* _FROM_SVG_END_ */

/**
 * Pixel per Inch as a default value set to 96. Can be changed for more realistic conversion.
 */
fabric.DPI = 96;
fabric.reNum = '(?:[-+]?(?:\\d+|\\d*\\.\\d+)(?:[eE][-+]?\\d+)?)';
fabric.commaWsp = '(?:\\s+,?\\s*|,\\s*)';
fabric.rePathCommand = /([-+]?((\d+\.\d+)|((\d+)|(\.\d+)))(?:[eE][-+]?\d+)?)/ig;
fabric.reNonWord = /[ \n\.,;!\?\-]/;
fabric.fontPaths = { };
fabric.iMatrix = [1, 0, 0, 1, 0, 0];
fabric.svgNS = 'http://www.w3.org/2000/svg';

/**
 * Pixel limit for cache canvases. 1Mpx , 4Mpx should be fine.
 * @since 1.7.14
 * @type Number
 * @default
 */
fabric.perfLimitSizeTotal = 2097152;

/**
 * Pixel limit for cache canvases width or height. IE fixes the maximum at 5000
 * @since 1.7.14
 * @type Number
 * @default
 */
fabric.maxCacheSideLimit = 4096;

/**
 * Lowest pixel limit for cache canvases, set at 256PX
 * @since 1.7.14
 * @type Number
 * @default
 */
fabric.minCacheSideLimit = 256;

/**
 * Cache Object for widths of chars in text rendering.
 */
fabric.charWidthsCache = { };

/**
 * if webgl is enabled and available, textureSize will determine the size
 * of the canvas backend
 * @since 2.0.0
 * @type Number
 * @default
 */
fabric.textureSize = 2048;

/**
 * When 'true', style information is not retained when copy/pasting text, making
 * pasted text use destination style.
 * Defaults to 'false'.
 * @type Boolean
 * @default
 */
fabric.disableStyleCopyPaste = false;

/**
 * Enable webgl for filtering picture is available
 * A filtering backend will be initialized, this will both take memory and
 * time since a default 2048x2048 canvas will be created for the gl context
 * @since 2.0.0
 * @type Boolean
 * @default
 */
fabric.enableGLFiltering = true;

/**
 * Device Pixel Ratio
 * @see https://developer.apple.com/library/safari/documentation/AudioVideo/Conceptual/HTML-canvas-guide/SettingUptheCanvas/SettingUptheCanvas.html
 */
fabric.devicePixelRatio = fabric.window.devicePixelRatio ||
                          fabric.window.webkitDevicePixelRatio ||
                          fabric.window.mozDevicePixelRatio ||
                          1;
/**
 * Browser-specific constant to adjust CanvasRenderingContext2D.shadowBlur value,
 * which is unitless and not rendered equally across browsers.
 *
 * Values that work quite well (as of October 2017) are:
 * - Chrome: 1.5
 * - Edge: 1.75
 * - Firefox: 0.9
 * - Safari: 0.95
 *
 * @since 2.0.0
 * @type Number
 * @default 1
 */
fabric.browserShadowBlurConstant = 1;

/**
 * This object contains the result of arc to bezier conversion for faster retrieving if the same arc needs to be converted again.
 * It was an internal variable, is accessible since version 2.3.4
 */
fabric.arcToSegmentsCache = { };

/**
 * This object keeps the results of the boundsOfCurve calculation mapped by the joined arguments necessary to calculate it.
 * It does speed up calculation, if you parse and add always the same paths, but in case of heavy usage of freedrawing
 * you do not get any speed benefit and you get a big object in memory.
 * The object was a private variable before, while now is appended to the lib so that you have access to it and you
 * can eventually clear it.
 * It was an internal variable, is accessible since version 2.3.4
 */
fabric.boundsOfCurveCache = { };

/**
 * If disabled boundsOfCurveCache is not used. For apps that make heavy usage of pencil drawing probably disabling it is better
 * @default true
 */
fabric.cachesBoundsOfCurve = true;

/**
 * Skip performance testing of setupGLContext and force the use of putImageData that seems to be the one that works best on
 * Chrome + old hardware. if your users are experiencing empty images after filtering you may try to force this to true
 * this has to be set before instantiating the filtering backend ( before filtering the first image )
 * @type Boolean
 * @default false
 */
fabric.forceGLPutImageData = false;

fabric.initFilterBackend = function() {
  if (fabric.enableGLFiltering && fabric.isWebglSupported && fabric.isWebglSupported(fabric.textureSize)) {
    console.log('max texture size: ' + fabric.maxTextureSize);
    return (new fabric.WebglFilterBackend({ tileSize: fabric.textureSize }));
  }
  else if (fabric.Canvas2dFilterBackend) {
    return (new fabric.Canvas2dFilterBackend());
  }
};


if (typeof document !== 'undefined' && typeof window !== 'undefined') {
  // ensure globality even if entire library were function wrapped (as in Meteor.js packaging system)
  window.fabric = fabric;
}


(function() {

  /**
   * @private
   * @param {String} eventName
   * @param {Function} handler
   */
  function _removeEventListener(eventName, handler) {
    if (!this.__eventListeners[eventName]) {
      return;
    }
    var eventListener = this.__eventListeners[eventName];
    if (handler) {
      eventListener[eventListener.indexOf(handler)] = false;
    }
    else {
      fabric.util.array.fill(eventListener, false);
    }
  }

  /**
   * Observes specified event
   * @memberOf fabric.Observable
   * @alias on
   * @param {String|Object} eventName Event name (eg. 'after:render') or object with key/value pairs (eg. {'after:render': handler, 'selection:cleared': handler})
   * @param {Function} handler Function that receives a notification when an event of the specified type occurs
   * @return {Self} thisArg
   * @chainable
   */
  function on(eventName, handler) {
    if (!this.__eventListeners) {
      this.__eventListeners = { };
    }
    // one object with key/value pairs was passed
    if (arguments.length === 1) {
      for (var prop in eventName) {
        this.on(prop, eventName[prop]);
      }
    }
    else {
      if (!this.__eventListeners[eventName]) {
        this.__eventListeners[eventName] = [];
      }
      this.__eventListeners[eventName].push(handler);
    }
    return this;
  }

  function _once(eventName, handler) {
    var _handler = function () {
      handler.apply(this, arguments);
      this.off(eventName, _handler);
    }.bind(this);
    this.on(eventName, _handler);
  }

  function once(eventName, handler) {
    // one object with key/value pairs was passed
    if (arguments.length === 1) {
      for (var prop in eventName) {
        _once.call(this, prop, eventName[prop]);
      }
    }
    else {
      _once.call(this, eventName, handler);
    }
    return this;
  }

  /**
   * Stops event observing for a particular event handler. Calling this method
   * without arguments removes all handlers for all events
   * @memberOf fabric.Observable
   * @alias off
   * @param {String|Object} eventName Event name (eg. 'after:render') or object with key/value pairs (eg. {'after:render': handler, 'selection:cleared': handler})
   * @param {Function} handler Function to be deleted from EventListeners
   * @return {Self} thisArg
   * @chainable
   */
  function off(eventName, handler) {
    if (!this.__eventListeners) {
      return this;
    }

    // remove all key/value pairs (event name -> event handler)
    if (arguments.length === 0) {
      for (eventName in this.__eventListeners) {
        _removeEventListener.call(this, eventName);
      }
    }
    // one object with key/value pairs was passed
    else if (arguments.length === 1 && typeof arguments[0] === 'object') {
      for (var prop in eventName) {
        _removeEventListener.call(this, prop, eventName[prop]);
      }
    }
    else {
      _removeEventListener.call(this, eventName, handler);
    }
    return this;
  }

  /**
   * Fires event with an optional options object
   * @memberOf fabric.Observable
   * @param {String} eventName Event name to fire
   * @param {Object} [options] Options object
   * @return {Self} thisArg
   * @chainable
   */
  function fire(eventName, options) {
    if (!this.__eventListeners) {
      return this;
    }

    var listenersForEvent = this.__eventListeners[eventName];
    if (!listenersForEvent) {
      return this;
    }

    for (var i = 0, len = listenersForEvent.length; i < len; i++) {
      listenersForEvent[i] && listenersForEvent[i].call(this, options || { });
    }
    this.__eventListeners[eventName] = listenersForEvent.filter(function(value) {
      return value !== false;
    });
    return this;
  }

  /**
   * @namespace fabric.Observable
   * @tutorial {@link http://fabricjs.com/fabric-intro-part-2#events}
   * @see {@link http://fabricjs.com/events|Events demo}
   */
  fabric.Observable = {
    fire: fire,
    on: on,
    once: once,
    off: off,
  };
})();


/**
 * @namespace fabric.Collection
 */
fabric.Collection = {

  _objects: [],

  /**
   * Adds objects to collection, Canvas or Group, then renders canvas
   * (if `renderOnAddRemove` is not `false`).
   * in case of Group no changes to bounding box are made.
   * Objects should be instances of (or inherit from) fabric.Object
   * Use of this function is highly discouraged for groups.
   * you can add a bunch of objects with the add method but then you NEED
   * to run a addWithUpdate call for the Group class or position/bbox will be wrong.
   * @param {...fabric.Object} object Zero or more fabric instances
   * @return {Self} thisArg
   * @chainable
   */
  add: function () {
    this._objects.push.apply(this._objects, arguments);
    if (this._onObjectAdded) {
      for (var i = 0, length = arguments.length; i < length; i++) {
        this._onObjectAdded(arguments[i]);
      }
    }
    this.renderOnAddRemove && this.requestRenderAll();
    return this;
  },

  /**
   * Inserts an object into collection at specified index, then renders canvas (if `renderOnAddRemove` is not `false`)
   * An object should be an instance of (or inherit from) fabric.Object
   * Use of this function is highly discouraged for groups.
   * you can add a bunch of objects with the insertAt method but then you NEED
   * to run a addWithUpdate call for the Group class or position/bbox will be wrong.
   * @param {Object} object Object to insert
   * @param {Number} index Index to insert object at
   * @param {Boolean} nonSplicing When `true`, no splicing (shifting) of objects occurs
   * @return {Self} thisArg
   * @chainable
   */
  insertAt: function (object, index, nonSplicing) {
    var objects = this._objects;
    if (nonSplicing) {
      objects[index] = object;
    }
    else {
      objects.splice(index, 0, object);
    }
    this._onObjectAdded && this._onObjectAdded(object);
    this.renderOnAddRemove && this.requestRenderAll();
    return this;
  },

  /**
   * Removes objects from a collection, then renders canvas (if `renderOnAddRemove` is not `false`)
   * @param {...fabric.Object} object Zero or more fabric instances
   * @return {Self} thisArg
   * @chainable
   */
  remove: function() {
    var objects = this._objects,
        index, somethingRemoved = false;

    for (var i = 0, length = arguments.length; i < length; i++) {
      index = objects.indexOf(arguments[i]);

      // only call onObjectRemoved if an object was actually removed
      if (index !== -1) {
        somethingRemoved = true;
        objects.splice(index, 1);
        this._onObjectRemoved && this._onObjectRemoved(arguments[i]);
      }
    }

    this.renderOnAddRemove && somethingRemoved && this.requestRenderAll();
    return this;
  },

  /**
   * Executes given function for each object in this group
   * @param {Function} callback
   *                   Callback invoked with current object as first argument,
   *                   index - as second and an array of all objects - as third.
   *                   Callback is invoked in a context of Global Object (e.g. `window`)
   *                   when no `context` argument is given
   *
   * @param {Object} context Context (aka thisObject)
   * @return {Self} thisArg
   * @chainable
   */
  forEachObject: function(callback, context) {
    var objects = this.getObjects();
    for (var i = 0, len = objects.length; i < len; i++) {
      callback.call(context, objects[i], i, objects);
    }
    return this;
  },

  /**
   * Returns an array of children objects of this instance
   * Type parameter introduced in 1.3.10
   * since 2.3.5 this method return always a COPY of the array;
   * @param {String} [type] When specified, only objects of this type are returned
   * @return {Array}
   */
  getObjects: function(type) {
    if (typeof type === 'undefined') {
      return this._objects.concat();
    }
    return this._objects.filter(function(o) {
      return o.type === type;
    });
  },

  /**
   * Returns object at specified index
   * @param {Number} index
   * @return {Self} thisArg
   */
  item: function (index) {
    return this._objects[index];
  },

  /**
   * Returns true if collection contains no objects
   * @return {Boolean} true if collection is empty
   */
  isEmpty: function () {
    return this._objects.length === 0;
  },

  /**
   * Returns a size of a collection (i.e: length of an array containing its objects)
   * @return {Number} Collection size
   */
  size: function() {
    return this._objects.length;
  },

  /**
   * Returns true if collection contains an object
   * @param {Object} object Object to check against
   * @param {Boolean} [deep=false] `true` to check all descendants, `false` to check only `_objects`
   * @return {Boolean} `true` if collection contains an object
   */
  contains: function (object, deep) {
    if (this._objects.indexOf(object) > -1) {
      return true;
    }
    else if (deep) {
      return this._objects.some(function (obj) {
        return typeof obj.contains === 'function' && obj.contains(object, true);
      });
    }
    return false;
  },

  /**
   * Returns number representation of a collection complexity
   * @return {Number} complexity
   */
  complexity: function () {
    return this._objects.reduce(function (memo, current) {
      memo += current.complexity ? current.complexity() : 0;
      return memo;
    }, 0);
  }
};


/**
 * @namespace fabric.CommonMethods
 */
fabric.CommonMethods = {

  /**
   * Sets object's properties from options
   * @param {Object} [options] Options object
   */
  _setOptions: function(options) {
    for (var prop in options) {
      this.set(prop, options[prop]);
    }
  },

  /**
   * @private
   * @param {Object} [filler] Options object
   * @param {String} [property] property to set the Gradient to
   */
  _initGradient: function(filler, property) {
    if (filler && filler.colorStops && !(filler instanceof fabric.Gradient)) {
      this.set(property, new fabric.Gradient(filler));
    }
  },

  /**
   * @private
   * @param {Object} [filler] Options object
   * @param {String} [property] property to set the Pattern to
   * @param {Function} [callback] callback to invoke after pattern load
   */
  _initPattern: function(filler, property, callback) {
    if (filler && filler.source && !(filler instanceof fabric.Pattern)) {
      this.set(property, new fabric.Pattern(filler, callback));
    }
    else {
      callback && callback();
    }
  },

  /**
   * @private
   */
  _setObject: function(obj) {
    for (var prop in obj) {
      this._set(prop, obj[prop]);
    }
  },

  /**
   * Sets property to a given value. When changing position/dimension -related properties (left, top, scale, angle, etc.) `set` does not update position of object's borders/controls. If you need to update those, call `setCoords()`.
   * @param {String|Object} key Property name or object (if object, iterate over the object properties)
   * @param {Object|Function} value Property value (if function, the value is passed into it and its return value is used as a new one)
   * @return {fabric.Object} thisArg
   * @chainable
   */
  set: function(key, value) {
    if (typeof key === 'object') {
      this._setObject(key);
    }
    else {
      this._set(key, value);
    }
    return this;
  },

  _set: function(key, value) {
    this[key] = value;
  },

  /**
   * Toggles specified property from `true` to `false` or from `false` to `true`
   * @param {String} property Property to toggle
   * @return {fabric.Object} thisArg
   * @chainable
   */
  toggle: function(property) {
    var value = this.get(property);
    if (typeof value === 'boolean') {
      this.set(property, !value);
    }
    return this;
  },

  /**
   * Basic getter
   * @param {String} property Property name
   * @return {*} value of a property
   */
  get: function(property) {
    return this[property];
  }
};


(function(global) {

  var sqrt = Math.sqrt,
      atan2 = Math.atan2,
      pow = Math.pow,
      PiBy180 = Math.PI / 180,
      PiBy2 = Math.PI / 2;

  /**
   * @namespace fabric.util
   */
  fabric.util = {

    /**
     * Calculate the cos of an angle, avoiding returning floats for known results
     * @static
     * @memberOf fabric.util
     * @param {Number} angle the angle in radians or in degree
     * @return {Number}
     */
    cos: function(angle) {
      if (angle === 0) { return 1; }
      if (angle < 0) {
        // cos(a) = cos(-a)
        angle = -angle;
      }
      var angleSlice = angle / PiBy2;
      switch (angleSlice) {
        case 1: case 3: return 0;
        case 2: return -1;
      }
      return Math.cos(angle);
    },

    /**
     * Calculate the sin of an angle, avoiding returning floats for known results
     * @static
     * @memberOf fabric.util
     * @param {Number} angle the angle in radians or in degree
     * @return {Number}
     */
    sin: function(angle) {
      if (angle === 0) { return 0; }
      var angleSlice = angle / PiBy2, sign = 1;
      if (angle < 0) {
        // sin(-a) = -sin(a)
        sign = -1;
      }
      switch (angleSlice) {
        case 1: return sign;
        case 2: return 0;
        case 3: return -sign;
      }
      return Math.sin(angle);
    },

    /**
     * Removes value from an array.
     * Presence of value (and its position in an array) is determined via `Array.prototype.indexOf`
     * @static
     * @memberOf fabric.util
     * @param {Array} array
     * @param {*} value
     * @return {Array} original array
     */
    removeFromArray: function(array, value) {
      var idx = array.indexOf(value);
      if (idx !== -1) {
        array.splice(idx, 1);
      }
      return array;
    },

    /**
     * Returns random number between 2 specified ones.
     * @static
     * @memberOf fabric.util
     * @param {Number} min lower limit
     * @param {Number} max upper limit
     * @return {Number} random value (between min and max)
     */
    getRandomInt: function(min, max) {
      return Math.floor(Math.random() * (max - min + 1)) + min;
    },

    /**
     * Transforms degrees to radians.
     * @static
     * @memberOf fabric.util
     * @param {Number} degrees value in degrees
     * @return {Number} value in radians
     */
    degreesToRadians: function(degrees) {
      return degrees * PiBy180;
    },

    /**
     * Transforms radians to degrees.
     * @static
     * @memberOf fabric.util
     * @param {Number} radians value in radians
     * @return {Number} value in degrees
     */
    radiansToDegrees: function(radians) {
      return radians / PiBy180;
    },

    /**
     * Rotates `point` around `origin` with `radians`
     * @static
     * @memberOf fabric.util
     * @param {fabric.Point} point The point to rotate
     * @param {fabric.Point} origin The origin of the rotation
     * @param {Number} radians The radians of the angle for the rotation
     * @return {fabric.Point} The new rotated point
     */
    rotatePoint: function(point, origin, radians) {
      var newPoint = new fabric.Point(point.x - origin.x, point.y - origin.y),
          v = fabric.util.rotateVector(newPoint, radians);
      return new fabric.Point(v.x, v.y).addEquals(origin);
    },

    /**
     * Rotates `vector` with `radians`
     * @static
     * @memberOf fabric.util
     * @param {Object} vector The vector to rotate (x and y)
     * @param {Number} radians The radians of the angle for the rotation
     * @return {Object} The new rotated point
     */
    rotateVector: function(vector, radians) {
      var sin = fabric.util.sin(radians),
          cos = fabric.util.cos(radians),
          rx = vector.x * cos - vector.y * sin,
          ry = vector.x * sin + vector.y * cos;
      return {
        x: rx,
        y: ry
      };
    },

    /**
     * Apply transform t to point p
     * @static
     * @memberOf fabric.util
     * @param  {fabric.Point} p The point to transform
     * @param  {Array} t The transform
     * @param  {Boolean} [ignoreOffset] Indicates that the offset should not be applied
     * @return {fabric.Point} The transformed point
     */
    transformPoint: function(p, t, ignoreOffset) {
      if (ignoreOffset) {
        return new fabric.Point(
          t[0] * p.x + t[2] * p.y,
          t[1] * p.x + t[3] * p.y
        );
      }
      return new fabric.Point(
        t[0] * p.x + t[2] * p.y + t[4],
        t[1] * p.x + t[3] * p.y + t[5]
      );
    },

    /**
     * Returns coordinates of points's bounding rectangle (left, top, width, height)
     * @param {Array} points 4 points array
     * @param {Array} [transform] an array of 6 numbers representing a 2x3 transform matrix
     * @return {Object} Object with left, top, width, height properties
     */
    makeBoundingBoxFromPoints: function(points, transform) {
      if (transform) {
        for (var i = 0; i < points.length; i++) {
          points[i] = fabric.util.transformPoint(points[i], transform);
        }
      }
      var xPoints = [points[0].x, points[1].x, points[2].x, points[3].x],
          minX = fabric.util.array.min(xPoints),
          maxX = fabric.util.array.max(xPoints),
          width = maxX - minX,
          yPoints = [points[0].y, points[1].y, points[2].y, points[3].y],
          minY = fabric.util.array.min(yPoints),
          maxY = fabric.util.array.max(yPoints),
          height = maxY - minY;

      return {
        left: minX,
        top: minY,
        width: width,
        height: height
      };
    },

    /**
     * Invert transformation t
     * @static
     * @memberOf fabric.util
     * @param {Array} t The transform
     * @return {Array} The inverted transform
     */
    invertTransform: function(t) {
      var a = 1 / (t[0] * t[3] - t[1] * t[2]),
          r = [a * t[3], -a * t[1], -a * t[2], a * t[0]],
          o = fabric.util.transformPoint({ x: t[4], y: t[5] }, r, true);
      r[4] = -o.x;
      r[5] = -o.y;
      return r;
    },

    /**
     * A wrapper around Number#toFixed, which contrary to native method returns number, not string.
     * @static
     * @memberOf fabric.util
     * @param {Number|String} number number to operate on
     * @param {Number} fractionDigits number of fraction digits to "leave"
     * @return {Number}
     */
    toFixed: function(number, fractionDigits) {
      return parseFloat(Number(number).toFixed(fractionDigits));
    },

    /**
     * Converts from attribute value to pixel value if applicable.
     * Returns converted pixels or original value not converted.
     * @param {Number|String} value number to operate on
     * @param {Number} fontSize
     * @return {Number|String}
     */
    parseUnit: function(value, fontSize) {
      var unit = /\D{0,2}$/.exec(value),
          number = parseFloat(value);
      if (!fontSize) {
        fontSize = fabric.Text.DEFAULT_SVG_FONT_SIZE;
      }
      switch (unit[0]) {
        case 'mm':
          return number * fabric.DPI / 25.4;

        case 'cm':
          return number * fabric.DPI / 2.54;

        case 'in':
          return number * fabric.DPI;

        case 'pt':
          return number * fabric.DPI / 72; // or * 4 / 3

        case 'pc':
          return number * fabric.DPI / 72 * 12; // or * 16

        case 'em':
          return number * fontSize;

        default:
          return number;
      }
    },

    /**
     * Function which always returns `false`.
     * @static
     * @memberOf fabric.util
     * @return {Boolean}
     */
    falseFunction: function() {
      return false;
    },

    /**
     * Returns klass "Class" object of given namespace
     * @memberOf fabric.util
     * @param {String} type Type of object (eg. 'circle')
     * @param {String} namespace Namespace to get klass "Class" object from
     * @return {Object} klass "Class"
     */
    getKlass: function(type, namespace) {
      // capitalize first letter only
      type = fabric.util.string.camelize(type.charAt(0).toUpperCase() + type.slice(1));
      return fabric.util.resolveNamespace(namespace)[type];
    },

    /**
     * Returns array of attributes for given svg that fabric parses
     * @memberOf fabric.util
     * @param {String} type Type of svg element (eg. 'circle')
     * @return {Ar