pdf-lib
Version:
Library for creating and modifying PDF files in JavaScript
1,725 lines (1,567 loc) • 1.89 MB
JavaScript
(function (global, factory) {
typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports) :
typeof define === 'function' && define.amd ? define(['exports'], factory) :
factory(global.PDFLib = {});
}(typeof self !== 'undefined' ? self : this, function (exports) {
var commonjsGlobal = typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
function createCommonjsModule(fn, module) {
return module = { exports: {} }, fn(module, module.exports), module.exports;
}
/** Detect free variable `global` from Node.js. */
var freeGlobal = typeof commonjsGlobal == 'object' && commonjsGlobal && commonjsGlobal.Object === Object && commonjsGlobal;
var _freeGlobal = freeGlobal;
/** Detect free variable `self`. */
var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
/** Used as a reference to the global object. */
var root = _freeGlobal || freeSelf || Function('return this')();
var _root = root;
/** Built-in value references. */
var Symbol$1 = _root.Symbol;
var _Symbol = Symbol$1;
/** Used for built-in method references. */
var objectProto = Object.prototype;
/** Used to check objects for own properties. */
var hasOwnProperty = objectProto.hasOwnProperty;
/**
* Used to resolve the
* [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
* of values.
*/
var nativeObjectToString = objectProto.toString;
/** Built-in value references. */
var symToStringTag = _Symbol ? _Symbol.toStringTag : undefined;
/**
* A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
*
* @private
* @param {*} value The value to query.
* @returns {string} Returns the raw `toStringTag`.
*/
function getRawTag(value) {
var isOwn = hasOwnProperty.call(value, symToStringTag),
tag = value[symToStringTag];
try {
value[symToStringTag] = undefined;
} catch (e) {}
var result = nativeObjectToString.call(value);
{
if (isOwn) {
value[symToStringTag] = tag;
} else {
delete value[symToStringTag];
}
}
return result;
}
var _getRawTag = getRawTag;
/** Used for built-in method references. */
var objectProto$1 = Object.prototype;
/**
* Used to resolve the
* [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
* of values.
*/
var nativeObjectToString$1 = objectProto$1.toString;
/**
* Converts `value` to a string using `Object.prototype.toString`.
*
* @private
* @param {*} value The value to convert.
* @returns {string} Returns the converted string.
*/
function objectToString(value) {
return nativeObjectToString$1.call(value);
}
var _objectToString = objectToString;
/** `Object#toString` result references. */
var nullTag = '[object Null]',
undefinedTag = '[object Undefined]';
/** Built-in value references. */
var symToStringTag$1 = _Symbol ? _Symbol.toStringTag : undefined;
/**
* The base implementation of `getTag` without fallbacks for buggy environments.
*
* @private
* @param {*} value The value to query.
* @returns {string} Returns the `toStringTag`.
*/
function baseGetTag(value) {
if (value == null) {
return value === undefined ? undefinedTag : nullTag;
}
return (symToStringTag$1 && symToStringTag$1 in Object(value))
? _getRawTag(value)
: _objectToString(value);
}
var _baseGetTag = baseGetTag;
/**
* Checks if `value` is object-like. A value is object-like if it's not `null`
* and has a `typeof` result of "object".
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is object-like, else `false`.
* @example
*
* _.isObjectLike({});
* // => true
*
* _.isObjectLike([1, 2, 3]);
* // => true
*
* _.isObjectLike(_.noop);
* // => false
*
* _.isObjectLike(null);
* // => false
*/
function isObjectLike(value) {
return value != null && typeof value == 'object';
}
var isObjectLike_1 = isObjectLike;
/** `Object#toString` result references. */
var numberTag = '[object Number]';
/**
* Checks if `value` is classified as a `Number` primitive or object.
*
* **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are
* classified as numbers, use the `_.isFinite` method.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a number, else `false`.
* @example
*
* _.isNumber(3);
* // => true
*
* _.isNumber(Number.MIN_VALUE);
* // => true
*
* _.isNumber(Infinity);
* // => true
*
* _.isNumber('3');
* // => false
*/
function isNumber(value) {
return typeof value == 'number' ||
(isObjectLike_1(value) && _baseGetTag(value) == numberTag);
}
var isNumber_1 = isNumber;
/**
* A specialized version of `_.map` for arrays without support for iteratee
* shorthands.
*
* @private
* @param {Array} [array] The array to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @returns {Array} Returns the new mapped array.
*/
function arrayMap(array, iteratee) {
var index = -1,
length = array == null ? 0 : array.length,
result = Array(length);
while (++index < length) {
result[index] = iteratee(array[index], index, array);
}
return result;
}
var _arrayMap = arrayMap;
/**
* The base implementation of `_.values` and `_.valuesIn` which creates an
* array of `object` property values corresponding to the property names
* of `props`.
*
* @private
* @param {Object} object The object to query.
* @param {Array} props The property names to get values for.
* @returns {Object} Returns the array of property values.
*/
function baseValues(object, props) {
return _arrayMap(props, function(key) {
return object[key];
});
}
var _baseValues = baseValues;
/**
* The base implementation of `_.times` without support for iteratee shorthands
* or max array length checks.
*
* @private
* @param {number} n The number of times to invoke `iteratee`.
* @param {Function} iteratee The function invoked per iteration.
* @returns {Array} Returns the array of results.
*/
function baseTimes(n, iteratee) {
var index = -1,
result = Array(n);
while (++index < n) {
result[index] = iteratee(index);
}
return result;
}
var _baseTimes = baseTimes;
/** `Object#toString` result references. */
var argsTag = '[object Arguments]';
/**
* The base implementation of `_.isArguments`.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is an `arguments` object,
*/
function baseIsArguments(value) {
return isObjectLike_1(value) && _baseGetTag(value) == argsTag;
}
var _baseIsArguments = baseIsArguments;
/** Used for built-in method references. */
var objectProto$2 = Object.prototype;
/** Used to check objects for own properties. */
var hasOwnProperty$1 = objectProto$2.hasOwnProperty;
/** Built-in value references. */
var propertyIsEnumerable = objectProto$2.propertyIsEnumerable;
/**
* Checks if `value` is likely an `arguments` object.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is an `arguments` object,
* else `false`.
* @example
*
* _.isArguments(function() { return arguments; }());
* // => true
*
* _.isArguments([1, 2, 3]);
* // => false
*/
var isArguments = _baseIsArguments(function() { return arguments; }()) ? _baseIsArguments : function(value) {
return isObjectLike_1(value) && hasOwnProperty$1.call(value, 'callee') &&
!propertyIsEnumerable.call(value, 'callee');
};
var isArguments_1 = isArguments;
/**
* Checks if `value` is classified as an `Array` object.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is an array, else `false`.
* @example
*
* _.isArray([1, 2, 3]);
* // => true
*
* _.isArray(document.body.children);
* // => false
*
* _.isArray('abc');
* // => false
*
* _.isArray(_.noop);
* // => false
*/
var isArray = Array.isArray;
var isArray_1 = isArray;
/**
* This method returns `false`.
*
* @static
* @memberOf _
* @since 4.13.0
* @category Util
* @returns {boolean} Returns `false`.
* @example
*
* _.times(2, _.stubFalse);
* // => [false, false]
*/
function stubFalse() {
return false;
}
var stubFalse_1 = stubFalse;
var isBuffer_1 = createCommonjsModule(function (module, exports) {
/** Detect free variable `exports`. */
var freeExports = exports && !exports.nodeType && exports;
/** Detect free variable `module`. */
var freeModule = freeExports && 'object' == 'object' && module && !module.nodeType && module;
/** Detect the popular CommonJS extension `module.exports`. */
var moduleExports = freeModule && freeModule.exports === freeExports;
/** Built-in value references. */
var Buffer = moduleExports ? _root.Buffer : undefined;
/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined;
/**
* Checks if `value` is a buffer.
*
* @static
* @memberOf _
* @since 4.3.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
* @example
*
* _.isBuffer(new Buffer(2));
* // => true
*
* _.isBuffer(new Uint8Array(2));
* // => false
*/
var isBuffer = nativeIsBuffer || stubFalse_1;
module.exports = isBuffer;
});
/** Used as references for various `Number` constants. */
var MAX_SAFE_INTEGER = 9007199254740991;
/** Used to detect unsigned integer values. */
var reIsUint = /^(?:0|[1-9]\d*)$/;
/**
* Checks if `value` is a valid array-like index.
*
* @private
* @param {*} value The value to check.
* @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
* @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
*/
function isIndex(value, length) {
length = length == null ? MAX_SAFE_INTEGER : length;
return !!length &&
(typeof value == 'number' || reIsUint.test(value)) &&
(value > -1 && value % 1 == 0 && value < length);
}
var _isIndex = isIndex;
/** Used as references for various `Number` constants. */
var MAX_SAFE_INTEGER$1 = 9007199254740991;
/**
* Checks if `value` is a valid array-like length.
*
* **Note:** This method is loosely based on
* [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
* @example
*
* _.isLength(3);
* // => true
*
* _.isLength(Number.MIN_VALUE);
* // => false
*
* _.isLength(Infinity);
* // => false
*
* _.isLength('3');
* // => false
*/
function isLength(value) {
return typeof value == 'number' &&
value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER$1;
}
var isLength_1 = isLength;
/** `Object#toString` result references. */
var argsTag$1 = '[object Arguments]',
arrayTag = '[object Array]',
boolTag = '[object Boolean]',
dateTag = '[object Date]',
errorTag = '[object Error]',
funcTag = '[object Function]',
mapTag = '[object Map]',
numberTag$1 = '[object Number]',
objectTag = '[object Object]',
regexpTag = '[object RegExp]',
setTag = '[object Set]',
stringTag = '[object String]',
weakMapTag = '[object WeakMap]';
var arrayBufferTag = '[object ArrayBuffer]',
dataViewTag = '[object DataView]',
float32Tag = '[object Float32Array]',
float64Tag = '[object Float64Array]',
int8Tag = '[object Int8Array]',
int16Tag = '[object Int16Array]',
int32Tag = '[object Int32Array]',
uint8Tag = '[object Uint8Array]',
uint8ClampedTag = '[object Uint8ClampedArray]',
uint16Tag = '[object Uint16Array]',
uint32Tag = '[object Uint32Array]';
/** Used to identify `toStringTag` values of typed arrays. */
var typedArrayTags = {};
typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
typedArrayTags[uint32Tag] = true;
typedArrayTags[argsTag$1] = typedArrayTags[arrayTag] =
typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
typedArrayTags[errorTag] = typedArrayTags[funcTag] =
typedArrayTags[mapTag] = typedArrayTags[numberTag$1] =
typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
typedArrayTags[setTag] = typedArrayTags[stringTag] =
typedArrayTags[weakMapTag] = false;
/**
* The base implementation of `_.isTypedArray` without Node.js optimizations.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
*/
function baseIsTypedArray(value) {
return isObjectLike_1(value) &&
isLength_1(value.length) && !!typedArrayTags[_baseGetTag(value)];
}
var _baseIsTypedArray = baseIsTypedArray;
/**
* The base implementation of `_.unary` without support for storing metadata.
*
* @private
* @param {Function} func The function to cap arguments for.
* @returns {Function} Returns the new capped function.
*/
function baseUnary(func) {
return function(value) {
return func(value);
};
}
var _baseUnary = baseUnary;
var _nodeUtil = createCommonjsModule(function (module, exports) {
/** Detect free variable `exports`. */
var freeExports = exports && !exports.nodeType && exports;
/** Detect free variable `module`. */
var freeModule = freeExports && 'object' == 'object' && module && !module.nodeType && module;
/** Detect the popular CommonJS extension `module.exports`. */
var moduleExports = freeModule && freeModule.exports === freeExports;
/** Detect free variable `process` from Node.js. */
var freeProcess = moduleExports && _freeGlobal.process;
/** Used to access faster Node.js helpers. */
var nodeUtil = (function() {
try {
return freeProcess && freeProcess.binding && freeProcess.binding('util');
} catch (e) {}
}());
module.exports = nodeUtil;
});
/* Node.js helper references. */
var nodeIsTypedArray = _nodeUtil && _nodeUtil.isTypedArray;
/**
* Checks if `value` is classified as a typed array.
*
* @static
* @memberOf _
* @since 3.0.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
* @example
*
* _.isTypedArray(new Uint8Array);
* // => true
*
* _.isTypedArray([]);
* // => false
*/
var isTypedArray = nodeIsTypedArray ? _baseUnary(nodeIsTypedArray) : _baseIsTypedArray;
var isTypedArray_1 = isTypedArray;
/** Used for built-in method references. */
var objectProto$3 = Object.prototype;
/** Used to check objects for own properties. */
var hasOwnProperty$2 = objectProto$3.hasOwnProperty;
/**
* Creates an array of the enumerable property names of the array-like `value`.
*
* @private
* @param {*} value The value to query.
* @param {boolean} inherited Specify returning inherited property names.
* @returns {Array} Returns the array of property names.
*/
function arrayLikeKeys(value, inherited) {
var isArr = isArray_1(value),
isArg = !isArr && isArguments_1(value),
isBuff = !isArr && !isArg && isBuffer_1(value),
isType = !isArr && !isArg && !isBuff && isTypedArray_1(value),
skipIndexes = isArr || isArg || isBuff || isType,
result = skipIndexes ? _baseTimes(value.length, String) : [],
length = result.length;
for (var key in value) {
if ((inherited || hasOwnProperty$2.call(value, key)) &&
!(skipIndexes && (
// Safari 9 has enumerable `arguments.length` in strict mode.
key == 'length' ||
// Node.js 0.10 has enumerable non-index properties on buffers.
(isBuff && (key == 'offset' || key == 'parent')) ||
// PhantomJS 2 has enumerable non-index properties on typed arrays.
(isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||
// Skip index properties.
_isIndex(key, length)
))) {
result.push(key);
}
}
return result;
}
var _arrayLikeKeys = arrayLikeKeys;
/** Used for built-in method references. */
var objectProto$4 = Object.prototype;
/**
* Checks if `value` is likely a prototype object.
*
* @private
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
*/
function isPrototype(value) {
var Ctor = value && value.constructor,
proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto$4;
return value === proto;
}
var _isPrototype = isPrototype;
/**
* Creates a unary function that invokes `func` with its argument transformed.
*
* @private
* @param {Function} func The function to wrap.
* @param {Function} transform The argument transform.
* @returns {Function} Returns the new function.
*/
function overArg(func, transform) {
return function(arg) {
return func(transform(arg));
};
}
var _overArg = overArg;
/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeKeys = _overArg(Object.keys, Object);
var _nativeKeys = nativeKeys;
/** Used for built-in method references. */
var objectProto$5 = Object.prototype;
/** Used to check objects for own properties. */
var hasOwnProperty$3 = objectProto$5.hasOwnProperty;
/**
* The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
*
* @private
* @param {Object} object The object to query.
* @returns {Array} Returns the array of property names.
*/
function baseKeys(object) {
if (!_isPrototype(object)) {
return _nativeKeys(object);
}
var result = [];
for (var key in Object(object)) {
if (hasOwnProperty$3.call(object, key) && key != 'constructor') {
result.push(key);
}
}
return result;
}
var _baseKeys = baseKeys;
/**
* Checks if `value` is the
* [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
* of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is an object, else `false`.
* @example
*
* _.isObject({});
* // => true
*
* _.isObject([1, 2, 3]);
* // => true
*
* _.isObject(_.noop);
* // => true
*
* _.isObject(null);
* // => false
*/
function isObject(value) {
var type = typeof value;
return value != null && (type == 'object' || type == 'function');
}
var isObject_1 = isObject;
/** `Object#toString` result references. */
var asyncTag = '[object AsyncFunction]',
funcTag$1 = '[object Function]',
genTag = '[object GeneratorFunction]',
proxyTag = '[object Proxy]';
/**
* Checks if `value` is classified as a `Function` object.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a function, else `false`.
* @example
*
* _.isFunction(_);
* // => true
*
* _.isFunction(/abc/);
* // => false
*/
function isFunction(value) {
if (!isObject_1(value)) {
return false;
}
// The use of `Object#toString` avoids issues with the `typeof` operator
// in Safari 9 which returns 'object' for typed arrays and other constructors.
var tag = _baseGetTag(value);
return tag == funcTag$1 || tag == genTag || tag == asyncTag || tag == proxyTag;
}
var isFunction_1 = isFunction;
/**
* Checks if `value` is array-like. A value is considered array-like if it's
* not a function and has a `value.length` that's an integer greater than or
* equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is array-like, else `false`.
* @example
*
* _.isArrayLike([1, 2, 3]);
* // => true
*
* _.isArrayLike(document.body.children);
* // => true
*
* _.isArrayLike('abc');
* // => true
*
* _.isArrayLike(_.noop);
* // => false
*/
function isArrayLike(value) {
return value != null && isLength_1(value.length) && !isFunction_1(value);
}
var isArrayLike_1 = isArrayLike;
/**
* Creates an array of the own enumerable property names of `object`.
*
* **Note:** Non-object values are coerced to objects. See the
* [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
* for more details.
*
* @static
* @since 0.1.0
* @memberOf _
* @category Object
* @param {Object} object The object to query.
* @returns {Array} Returns the array of property names.
* @example
*
* function Foo() {
* this.a = 1;
* this.b = 2;
* }
*
* Foo.prototype.c = 3;
*
* _.keys(new Foo);
* // => ['a', 'b'] (iteration order is not guaranteed)
*
* _.keys('hi');
* // => ['0', '1']
*/
function keys(object) {
return isArrayLike_1(object) ? _arrayLikeKeys(object) : _baseKeys(object);
}
var keys_1 = keys;
/**
* Creates an array of the own enumerable string keyed property values of `object`.
*
* **Note:** Non-object values are coerced to objects.
*
* @static
* @since 0.1.0
* @memberOf _
* @category Object
* @param {Object} object The object to query.
* @returns {Array} Returns the array of property values.
* @example
*
* function Foo() {
* this.a = 1;
* this.b = 2;
* }
*
* Foo.prototype.c = 3;
*
* _.values(new Foo);
* // => [1, 2] (iteration order is not guaranteed)
*
* _.values('hi');
* // => ['h', 'i']
*/
function values(object) {
return object == null ? [] : _baseValues(object, keys_1(object));
}
var values_1 = values;
/** `Object#toString` result references. */
var symbolTag = '[object Symbol]';
/**
* Checks if `value` is classified as a `Symbol` primitive or object.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
* @example
*
* _.isSymbol(Symbol.iterator);
* // => true
*
* _.isSymbol('abc');
* // => false
*/
function isSymbol(value) {
return typeof value == 'symbol' ||
(isObjectLike_1(value) && _baseGetTag(value) == symbolTag);
}
var isSymbol_1 = isSymbol;
/** Used as references for various `Number` constants. */
var NAN = 0 / 0;
/**
* The base implementation of `_.toNumber` which doesn't ensure correct
* conversions of binary, hexadecimal, or octal string values.
*
* @private
* @param {*} value The value to process.
* @returns {number} Returns the number.
*/
function baseToNumber(value) {
if (typeof value == 'number') {
return value;
}
if (isSymbol_1(value)) {
return NAN;
}
return +value;
}
var _baseToNumber = baseToNumber;
/** Used as references for various `Number` constants. */
var INFINITY = 1 / 0;
/** Used to convert symbols to primitives and strings. */
var symbolProto = _Symbol ? _Symbol.prototype : undefined,
symbolToString = symbolProto ? symbolProto.toString : undefined;
/**
* The base implementation of `_.toString` which doesn't convert nullish
* values to empty strings.
*
* @private
* @param {*} value The value to process.
* @returns {string} Returns the string.
*/
function baseToString(value) {
// Exit early for strings to avoid a performance hit in some environments.
if (typeof value == 'string') {
return value;
}
if (isArray_1(value)) {
// Recursively convert values (susceptible to call stack limits).
return _arrayMap(value, baseToString) + '';
}
if (isSymbol_1(value)) {
return symbolToString ? symbolToString.call(value) : '';
}
var result = (value + '');
return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
}
var _baseToString = baseToString;
/**
* Creates a function that performs a mathematical operation on two values.
*
* @private
* @param {Function} operator The function to perform the operation.
* @param {number} [defaultValue] The value used for `undefined` arguments.
* @returns {Function} Returns the new mathematical operation function.
*/
function createMathOperation(operator, defaultValue) {
return function(value, other) {
var result;
if (value === undefined && other === undefined) {
return defaultValue;
}
if (value !== undefined) {
result = value;
}
if (other !== undefined) {
if (result === undefined) {
return other;
}
if (typeof value == 'string' || typeof other == 'string') {
value = _baseToString(value);
other = _baseToString(other);
} else {
value = _baseToNumber(value);
other = _baseToNumber(other);
}
result = operator(value, other);
}
return result;
};
}
var _createMathOperation = createMathOperation;
/**
* Adds two numbers.
*
* @static
* @memberOf _
* @since 3.4.0
* @category Math
* @param {number} augend The first number in an addition.
* @param {number} addend The second number in an addition.
* @returns {number} Returns the total.
* @example
*
* _.add(6, 4);
* // => 10
*/
var add = _createMathOperation(function(augend, addend) {
return augend + addend;
}, 0);
var add_1 = add;
/**
* The base implementation of `_.sum` and `_.sumBy` without support for
* iteratee shorthands.
*
* @private
* @param {Array} array The array to iterate over.
* @param {Function} iteratee The function invoked per iteration.
* @returns {number} Returns the sum.
*/
function baseSum(array, iteratee) {
var result,
index = -1,
length = array.length;
while (++index < length) {
var current = iteratee(array[index]);
if (current !== undefined) {
result = result === undefined ? current : (result + current);
}
}
return result;
}
var _baseSum = baseSum;
/**
* This method returns the first argument it receives.
*
* @static
* @since 0.1.0
* @memberOf _
* @category Util
* @param {*} value Any value.
* @returns {*} Returns `value`.
* @example
*
* var object = { 'a': 1 };
*
* console.log(_.identity(object) === object);
* // => true
*/
function identity(value) {
return value;
}
var identity_1 = identity;
/**
* Computes the sum of the values in `array`.
*
* @static
* @memberOf _
* @since 3.4.0
* @category Math
* @param {Array} array The array to iterate over.
* @returns {number} Returns the sum.
* @example
*
* _.sum([4, 2, 8, 6]);
* // => 20
*/
function sum(array) {
return (array && array.length)
? _baseSum(array, identity_1)
: 0;
}
var sum_1 = sum;
/* tslint:disable no-bitwise */
// export const writeToDebugFile = (data: any, postfix = 0) => {
// // eslint-disable-next-line
// const fs = require('fs');
// fs.writeFileSync(`/Users/user/Desktop/pdf-lib/debug${postfix}`, data);
// };
var error = function (msg) {
throw new Error(msg);
};
var sizeInBytes = function (n) { return Math.ceil(n.toString(2).length / 8); };
/**
* Converts a number into its constituent bytes and returns them as
* a number[].
*
* Returns most significant byte as first element in array. It may be necessary
* to call .reverse() to get the bits in the desired order.
*
* Example:
* bytesFor(0x02A41E) => [ 0b10, 0b10100100, 0b11110 ]
*
* Credit for algorithm: https://stackoverflow.com/a/1936865
*/
var bytesFor = function (n) {
var bytes = new Uint8Array(sizeInBytes(n));
for (var i = 1; i <= bytes.length; i++) {
bytes[i - 1] = n >> ((bytes.length - i) * 8);
}
return bytes;
};
// Arrays and TypedArrays in JS both have .reverse() methods, which would seem
// to negate the need for this function. However, not all runtimes support this
// method (e.g. React Native), so using this function compensates for that.
var reverseArray = function (array) {
for (var i = 0; i < Math.floor(array.length / 2); i++) {
var leftIdx = i;
var rightIdx = array.length - i - 1;
var temp = array[i];
array[leftIdx] = array[rightIdx];
array[rightIdx] = temp;
}
return array;
};
var and = function () {
var predicates = [];
for (var _i = 0; _i < arguments.length; _i++) {
predicates[_i] = arguments[_i];
}
return function () {
var values = [];
for (var _i = 0; _i < arguments.length; _i++) {
values[_i] = arguments[_i];
}
return predicates.every(function (predicate) { return predicate.apply(void 0, values); });
};
};
var or = function () {
var predicates = [];
for (var _i = 0; _i < arguments.length; _i++) {
predicates[_i] = arguments[_i];
}
return function () {
var values = [];
for (var _i = 0; _i < arguments.length; _i++) {
values[_i] = arguments[_i];
}
return predicates.some(function (predicate) { return predicate.apply(void 0, values); });
};
};
var not = function (predicate) { return function () {
var values = [];
for (var _i = 0; _i < arguments.length; _i++) {
values[_i] = arguments[_i];
}
return !predicate.apply(void 0, values);
}; };
var toBoolean = function (boolStr) {
if (boolStr === 'true')
return true;
if (boolStr === 'false')
return false;
throw new Error("\"" + boolStr + "\" cannot be converted to a boolean");
};
var charCode = function (charStr) {
if (charStr.length !== 1) {
throw new Error('"char" must be exactly one character long');
}
return charStr.charCodeAt(0);
};
var charFromCode = function (code) { return String.fromCharCode(code); };
var addStringToBuffer = function (str, buffer) {
for (var i = 0; i < str.length; i += 1) {
buffer[i] = str.charCodeAt(i);
}
return buffer.subarray(str.length);
};
var arrayToString = function (arr, startAt, stopAt) {
if (startAt === void 0) { startAt = 0; }
var stopIdx = stopAt === undefined || stopAt >= arr.length ? arr.length : stopAt;
var str = '';
for (var i = startAt; i < stopIdx; i += 1) {
str += charFromCode(arr[i]);
}
return str;
};
var arrayCharAt = function (arr, idx) {
return String.fromCharCode(arr[idx]);
};
var trimArray = function (arr) {
var idx = 0;
while (String.fromCharCode(arr[idx]).match(/^[\0\t\n\f\r ]/) &&
idx < arr.length) {
idx += 1;
}
return arr.subarray(idx);
};
var PERCENT_SIGN_CODE = charCode('%');
var NEWLINE_CODE = charCode('\n');
var CARRIAGE_RETURN_CODE = charCode('\r');
var isEOLMarker = function (code) {
return code === NEWLINE_CODE || code === CARRIAGE_RETURN_CODE;
};
var trimArrayAndRemoveComments = function (arr) {
var strippedComment = true;
var newArray = arr;
while (strippedComment) {
newArray = trimArray(newArray);
if (newArray[0] === PERCENT_SIGN_CODE) {
var idx = 0;
while (!isEOLMarker(newArray[idx]) && idx < newArray.length)
idx += 1;
var foundEOLMarker = isEOLMarker(newArray[idx]);
if (foundEOLMarker)
newArray = newArray.subarray(idx);
strippedComment = foundEOLMarker;
}
else {
strippedComment = false;
}
}
return newArray;
};
var arraysAreEqual = function (arr1, arr1Start, arr1Stop, arr2, arr2Start, arr2Stop) {
var arr1Length = arr1Stop - arr1Start;
if (arr1Length !== arr2Stop - arr2Start)
return false;
for (var i = 0; i < arr1Length; i += 1) {
if (arr1[arr1Start + i] !== arr2[arr2Start + i])
return false;
}
return true;
};
var arrayIndexOf = function (arr, targetStr, startFrom) {
if (startFrom === void 0) { startFrom = 0; }
var targetArr = targetStr.split('').map(function (c) { return c.charCodeAt(0); });
var currIdx = startFrom;
while (!arraysAreEqual(arr, currIdx, currIdx + targetStr.length, targetArr, 0, targetArr.length)) {
currIdx += 1;
if (currIdx >= arr.length)
return undefined;
}
return currIdx;
};
var arrayIndexOneOf = function (arr, targetStrings, startFrom) {
if (startFrom === void 0) { startFrom = 0; }
var targetArrs = targetStrings.map(function (str) { return str.split('').map(charCode); });
var currIdx = startFrom;
var match = null;
while (!match) {
currIdx += 1;
if (currIdx >= arr.length)
return undefined;
match = targetArrs.find(function (target) {
return arraysAreEqual(arr, currIdx, currIdx + target.length, target, 0, target.length);
});
}
return [currIdx, arrayToString(match)];
};
var arrayFindIndexOf = function (arr, predicate, startFrom) {
if (startFrom === void 0) { startFrom = 0; }
var currIdx = startFrom;
while (!predicate(arr.subarray(currIdx, currIdx + 1)[0])) {
currIdx += 1;
if (currIdx >= arr.length)
return undefined;
}
return currIdx;
};
var setCharAt = function (str, idx, newChar) {
return str.substring(0, idx) + newChar + str.substring(idx + 1);
};
/* Built-in method references for those with the same name as other `lodash` methods. */
var nativeMax = Math.max,
nativeMin = Math.min;
/**
* The base implementation of `_.inRange` which doesn't coerce arguments.
*
* @private
* @param {number} number The number to check.
* @param {number} start The start of the range.
* @param {number} end The end of the range.
* @returns {boolean} Returns `true` if `number` is in the range, else `false`.
*/
function baseInRange(number, start, end) {
return number >= nativeMin(start, end) && number < nativeMax(start, end);
}
var _baseInRange = baseInRange;
/** Used as references for various `Number` constants. */
var NAN$1 = 0 / 0;
/** Used to match leading and trailing whitespace. */
var reTrim = /^\s+|\s+$/g;
/** Used to detect bad signed hexadecimal string values. */
var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
/** Used to detect binary string values. */
var reIsBinary = /^0b[01]+$/i;
/** Used to detect octal string values. */
var reIsOctal = /^0o[0-7]+$/i;
/** Built-in method references without a dependency on `root`. */
var freeParseInt = parseInt;
/**
* Converts `value` to a number.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to process.
* @returns {number} Returns the number.
* @example
*
* _.toNumber(3.2);
* // => 3.2
*
* _.toNumber(Number.MIN_VALUE);
* // => 5e-324
*
* _.toNumber(Infinity);
* // => Infinity
*
* _.toNumber('3.2');
* // => 3.2
*/
function toNumber(value) {
if (typeof value == 'number') {
return value;
}
if (isSymbol_1(value)) {
return NAN$1;
}
if (isObject_1(value)) {
var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
value = isObject_1(other) ? (other + '') : other;
}
if (typeof value != 'string') {
return value === 0 ? value : +value;
}
value = value.replace(reTrim, '');
var isBinary = reIsBinary.test(value);
return (isBinary || reIsOctal.test(value))
? freeParseInt(value.slice(2), isBinary ? 2 : 8)
: (reIsBadHex.test(value) ? NAN$1 : +value);
}
var toNumber_1 = toNumber;
/** Used as references for various `Number` constants. */
var INFINITY$1 = 1 / 0,
MAX_INTEGER = 1.7976931348623157e+308;
/**
* Converts `value` to a finite number.
*
* @static
* @memberOf _
* @since 4.12.0
* @category Lang
* @param {*} value The value to convert.
* @returns {number} Returns the converted number.
* @example
*
* _.toFinite(3.2);
* // => 3.2
*
* _.toFinite(Number.MIN_VALUE);
* // => 5e-324
*
* _.toFinite(Infinity);
* // => 1.7976931348623157e+308
*
* _.toFinite('3.2');
* // => 3.2
*/
function toFinite(value) {
if (!value) {
return value === 0 ? value : 0;
}
value = toNumber_1(value);
if (value === INFINITY$1 || value === -INFINITY$1) {
var sign = (value < 0 ? -1 : 1);
return sign * MAX_INTEGER;
}
return value === value ? value : 0;
}
var toFinite_1 = toFinite;
/**
* Checks if `n` is between `start` and up to, but not including, `end`. If
* `end` is not specified, it's set to `start` with `start` then set to `0`.
* If `start` is greater than `end` the params are swapped to support
* negative ranges.
*
* @static
* @memberOf _
* @since 3.3.0
* @category Number
* @param {number} number The number to check.
* @param {number} [start=0] The start of the range.
* @param {number} end The end of the range.
* @returns {boolean} Returns `true` if `number` is in the range, else `false`.
* @see _.range, _.rangeRight
* @example
*
* _.inRange(3, 2, 4);
* // => true
*
* _.inRange(4, 8);
* // => true
*
* _.inRange(4, 2);
* // => false
*
* _.inRange(2, 2);
* // => false
*
* _.inRange(1.2, 2);
* // => true
*
* _.inRange(5.2, 4);
* // => false
*
* _.inRange(-3, -2, -6);
* // => true
*/
function inRange(number, start, end) {
start = toFinite_1(start);
if (end === undefined) {
end = start;
start = 0;
} else {
end = toFinite_1(end);
}
number = toNumber_1(number);
return _baseInRange(number, start, end);
}
var inRange_1 = inRange;
/**
* Checks if `value` is `NaN`.
*
* **Note:** This method is based on
* [`Number.isNaN`](https://mdn.io/Number/isNaN) and is not the same as
* global [`isNaN`](https://mdn.io/isNaN) which returns `true` for
* `undefined` and other non-number values.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
* @example
*
* _.isNaN(NaN);
* // => true
*
* _.isNaN(new Number(NaN));
* // => true
*
* isNaN(undefined);
* // => true
*
* _.isNaN(undefined);
* // => false
*/
function isNaN$1(value) {
// An `NaN` primitive is the only value that is not equal to itself.
// Perform the `toStringTag` check first to avoid errors with some
// ActiveX objects in IE.
return isNumber_1(value) && value != +value;
}
var _isNaN = isNaN$1;
/**
* Checks if `value` is `null` or `undefined`.
*
* @static
* @memberOf _
* @since 4.0.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is nullish, else `false`.
* @example
*
* _.isNil(null);
* // => true
*
* _.isNil(void 0);
* // => true
*
* _.isNil(NaN);
* // => false
*/
function isNil(value) {
return value == null;
}
var isNil_1 = isNil;
/* tslint:disable:ban-types */
var validate = function (value, predicate, msg) {
if (!predicate(value))
throw new Error(msg);
};
var optional = function (predicate) { return function (value) {
return isNil_1(value) || predicate(value);
}; };
var validateArr = function (value, predicate, msg) {
validate(value, isArray_1, 'validateArr.value must be an array.');
value.forEach(function (v) { return validate(v, predicate, msg); });
};
var isInstance = function (requiredClass) { return function (value) { return value instanceof requiredClass; }; };
var isArrayOf = function (requiredClass) { return function (value) {
if (!isArray_1(value))
return false;
for (var i = 0; i < value.length; i++) {
if (!(value[i] instanceof requiredClass))
return false;
}
return true;
}; };
var isIdentity = function (requiredValue) { return function (value) {
return value === requiredValue;
}; };
var isNotIdentity = function (requiredValue) { return function (value) {
return value !== requiredValue;
}; };
var doesMatch = function (regex) { return function (value) {
return !!value.match(regex);
}; };
var isNumber$1 = function (n) { return and(isNumber_1, not(_isNaN))(n); };
var isInRange = function (lower, upper) { return function (value) {
return inRange_1(value, lower, upper) || value === upper;
}; };
var oneOf = function () {
var allowed = [];
for (var _i = 0; _i < arguments.length; _i++) {
allowed[_i] = arguments[_i];
}
return function (value) {
return allowed.some(function (a) { return a === value; });
};
};
var PDFObjectIndex = /** @class */ (function () {
function PDFObjectIndex() {
var _this = this;
this.index = new Map();
this.highestObjectNumber = -1;
this.assign = function (key, val) {
validate(key, isInstance(PDFIndirectReference), '"key" must be a PDFIndirectReference');
validate(val, isInstance(PDFObject), '"val" must be a PDFObject');
if (key.objectNumber > _this.highestObjectNumber) {
_this.highestObjectNumber = key.objectNumber;
}
_this.index.set(key, val);
return _this;
};
this.nextObjectNumber = function () {
_this.highestObjectNumber += 1;
var ref = PDFIndirectReference.forNumbers(_this.highestObjectNumber, 0);
return ref;
};
this.assignNextObjectNumberTo = function (val) {
var ref = _this.nextObjectNumber();
_this.assign(ref, val);
return ref;
};
this.lookupMaybe = function (ref) {
if (ref instanceof PDFIndirectReference)
return _this.index.get(ref);
return ref;
};
this.lookup = function (ref) {
return _this.lookupMaybe(ref) || error("Failed to lookup ref: " + ref);
};
}
PDFObjectIndex.create = function () { return new PDFObjectIndex(); };
return PDFObjectIndex;
}());
var PDFObject = /** @class */ (function () {
function PDFObject() {
var _this = this;
this.clone = function () {
throw new Error("clone() is not implemented on " + _this.constructor.name);
};
this.toString = function () {
throw new Error("toString() is not implemented on " + _this.constructor.name);
};
this.bytesSize = function () {
throw new Error("bytesSize() is not implemented on " + _this.constructor.name);
};
this.copyBytesInto = function (buffer) {
throw new Error("copyBytesInto() is not implemented on " + _this.constructor.name);
};
}
return PDFObject;
}());
var __extends = (undefined && undefined.__extends) || (function () {
var extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
return function (d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
var PDFArray$$1 = /** @class */ (function (_super) {
__extends(PDFArray$$1, _super);
function PDFArray$$1(array, index) {
var _this = _super.call(this) || this;
_this.push = function () {
var val = [];
for (var _i = 0; _i < arguments.length; _i++) {
val[_i] = arguments[_i];
}
validateArr(val, isInstance(PDFObject), 'PDFArray.push() requires arguments to be PDFObjects');
(_a = _this.array).push.apply(_a, val);
return _this;
var _a;
};
_this.set = function (idx, val) {
validate(idx, isNumber_1, 'PDFArray.set() requires indexes to be numbers');
validate(val, isInstance(PDFObject), 'PDFArray.set() requires values to be PDFObjects');
_this.array[idx] = val;
return _this;
};
_this.get = function (idx) {
validate(idx, isNumber_1, 'PDFArray.get() requires indexes to be numbers');
return _this.array[idx];
};
_this.forEach = function (fn) {
return _this.array.forEach(fn);
};
_this.map = function (fn) {
return _this.array.map(fn);
};
_this.splice = function (start, deleteCount) {
return _this.array.splice(start, deleteCount);
};
_this.clone = function () { return PDFArray$$1.fromArray(_this.array.slice(), _this.index); };
_this.toString = function () {
var bufferSize = _this.bytesSize();
var buffer = new Uint8Array(bufferSize);
_this.copyBytesInto(buffer);
return arrayToString(buffer);
};
_this.bytesSize = function () {
return 2 + // "[ "
_this.array
.map(function (e) {
if (e instanceof PDFIndirectObject)
return e.toReference().length + 1;
else if (e instanceof PDFObject)
return e.bytesSize() + 1;
return error("Not a PDFObject: " + e);
})
.reduce(add_1, 0) +
1;
}; // "]";
_this.copyBytesInto = function (buffer) {
var remaining = addStringToBuffer('[ ', buffer);
_this.array.forEach(function (e, idx) {
if (e instanceof PDFIndirectObject) {
remaining = addStringToBuffer(e.toReference(), remaining);
}
else if (e instanceof PDFObject) {
remaining = e.copyBytesInto(remaining);
}
else {
error("Not a PDFObject: " + e);
}
remaining = addStringToBuffer(' ', remaining);
});
remaining = addStringToBuffer(']', remaining);
return remaining;
};
validateArr(array, isInstance(PDFObject), 'Cannot construct PDFArray from array whose elements are not PDFObjects');
validate(index, isInstance(PDFObjectIndex), '"index" must be a an instance of PDFObjectIndex');
_this.array = array;
_this.index = index;
return _this;
}
PDFArray$$1.fromArray = function (array, index) {
return new PDFArray$$1(array, index);
};
return PDFArray$$1;
}(PDFObject));
/** `Object#toString` result references. */
var boolTag$1 = '[object Boolean]';
/**
* Checks if `value` is classified as a boolean primitive or object.
*
* @static
* @memberOf _
* @since 0.1.0
* @category Lang
* @param {*} value The value to check.
* @returns {boolean} Returns `true` if `value` is a boolean, else `false`.
* @example
*
* _.isBoolean(false);
* // => true
*
* _.isBoolean(null);
* // => false
*/
function isBoolean(value) {
return value === true || value === false ||
(isObjectLike_1(value) && _baseGetTag(value) == boolTag$1);
}
var isBoolean_1 = isBoolean;
var __extends$1 = (undefined && undefined.__extends) || (function () {
var extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
return function (d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
var PDFBoolean = /** @class */ (function (_super) {
__extends$1(PDFBoolean, _super);
function PDFBoolean(bool) {
var _this = _super.call(this) || this;
_this.clone = function () { return PDFBoolean.fromBool(_this.boolean); };
_this.toString = function () { return _this.boolean.toString(); };
_this.bytesSize = function () { return _this.toString().length; };
_this.copyBytesInto = function (buffer) {
return addStringToBuffer(_this.toString(), buffer);
};
validate(bool, isBoolean_1, 'Can only construct PDFBooleans from Booleans');
_this.boolean = bool;
return _this;
}
PDFBoolean.fromBool = function (bool) { return new PDFBoolean(bool); };
PDFBoolean.fromString = function (boolStr) { return new PDFBoolean(toBoolean(boolStr)); };
return PDFBoolean;
}(PDFObject));
/**
* A specialized version of `_.for