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acroform.js
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acroform.js
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/**
* jsPDF AcroForm Plugin Copyright (c) 2016 Alexander Weidt,
* https://github.com/BiggA94
*
* Licensed under the MIT License. http://opensource.org/licenses/mit-license
*/
(function (jsPDFAPI, globalObj) {
'use strict';
var scope;
var pageHeight;
var scaleFactor = 1;
var inherit = function (child, parent) {
var ObjectCreate = Object.create || function (o) {
var F = function () {
};
F.prototype = o;
return new F();
};
child.prototype = Object.create(parent.prototype);
child.prototype.constructor = child;
};
var scale = function (x) {
return (x * (scaleFactor / 1));// 1 = (96 / 72)
};
var antiScale = function (x) {
return ((1 / scaleFactor ) * x);
};
var createFormXObject = function (formObject) {
var xobj = new AcroFormXObject;
var height = AcroFormAppearance.internal.getHeight(formObject) || 0;
var width = AcroFormAppearance.internal.getWidth(formObject) || 0;
xobj.BBox = [0, 0, width.toFixed(2), height.toFixed(2)];
return xobj;
};
var setBitPosition = function (variable, position, value) {
variable = variable || 0;
value = value || 1;
var bitMask = 1;
bitMask = bitMask << (position - 1);
if (value == 1) {
// Set the Bit to 1
var variable = variable | bitMask;
} else {
// Set the Bit to 0
var variable = variable & (~bitMask);
}
return variable;
};
var getBitPosition = function (variable, position) {
variable = variable || 0;
var bitMask = 1;
bitMask = bitMask << (position - 1);
return variable | bitMask;
};
/**
* Calculating the Ff entry:
*
* The Ff entry contains flags, that have to be set bitwise In the Following
* the number in the Comment is the BitPosition
*/
var calculateFlagsOnOptions = function (flags, opts, PDFVersion) {
var PDFVersion = PDFVersion || 1.3;
var flags = flags || 0;
// 1, readOnly
if (opts.readOnly == true) {
flags = setBitPosition(flags, 1);
}
// 2, required
if (opts.required == true) {
flags = setBitPosition(flags, 2);
}
// 4, noExport
if (opts.noExport == true) {
flags = setBitPosition(flags, 3);
}
// 13, multiline
if (opts.multiline == true) {
flags = setBitPosition(flags, 13);
}
// 14, Password
if (opts.password) {
flags = setBitPosition(flags, 14);
}
// 15, NoToggleToOff (Radio buttons only
if (opts.noToggleToOff) {
flags = setBitPosition(flags, 15);
}
// 16, Radio
if (opts.radio) {
flags = setBitPosition(flags, 16);
}
// 17, Pushbutton
if (opts.pushbutton) {
flags = setBitPosition(flags, 17);
}
// 18, Combo (If not set, the choiceField is a listBox!!)
if (opts.combo) {
flags = setBitPosition(flags, 18);
}
// 19, Edit
if (opts.edit) {
flags = setBitPosition(flags, 19);
}
// 20, Sort
if (opts.sort) {
flags = setBitPosition(flags, 20);
}
// 21, FileSelect, PDF 1.4...
if (opts.fileSelect && PDFVersion >= 1.4) {
flags = setBitPosition(flags, 21);
}
// 22, MultiSelect (PDF 1.4)
if (opts.multiSelect && PDFVersion >= 1.4) {
flags = setBitPosition(flags, 22);
}
// 23, DoNotSpellCheck (PDF 1.4)
if (opts.doNotSpellCheck && PDFVersion >= 1.4) {
flags = setBitPosition(flags, 23);
}
// 24, DoNotScroll (PDF 1.4)
if (opts.doNotScroll == true && PDFVersion >= 1.4) {
flags = setBitPosition(flags, 24);
}
// 25, RichText (PDF 1.4)
if (opts.richText && PDFVersion >= 1.4) {
flags = setBitPosition(flags, 25);
}
return flags;
}
var calculateCoordinates = function (args) {
var x = args[0];
var y = args[1];
var w = args[2];
var h = args[3];
var coordinates = {};
if (Array.isArray(x)) {
x[0] = scale(x[0]);
x[1] = scale(x[1]);
x[2] = scale(x[2]);
x[3] = scale(x[3]);
} else {
x = scale(x);
y = scale(y);
w = scale(w);
h = scale(h);
}
coordinates.lowerLeft_X = x || 0;
coordinates.lowerLeft_Y = scale(pageHeight) - y - h || 0;
coordinates.upperRight_X = x + w || 0;
coordinates.upperRight_Y = scale(pageHeight) - y || 0;
return [coordinates.lowerLeft_X.toFixed(2), coordinates.lowerLeft_Y.toFixed(2), coordinates.upperRight_X.toFixed(2), coordinates.upperRight_Y.toFixed(2)];
};
var calculateAppearanceStream = function (formObject) {
if (formObject.appearanceStreamContent) {
// If appearanceStream is already set, use it
return formObject.appearanceStreamContent;
}
if (!formObject.V && !formObject.DV) {
return;
}
// else calculate it
var stream = [];
var text = formObject.V || formObject.DV;
var calcRes = calculateX(formObject, text);
stream.push('/Tx BMC');
stream.push('q');
stream.push('/F1 ' + calcRes.fontSize.toFixed(2) + ' Tf');
stream.push('1 0 0 1 0 0 Tm');// Text Matrix
stream.push('BT'); // Begin Text
stream.push(calcRes.text);
stream.push('ET'); // End Text
stream.push('Q')
stream.push('EMC');
var appearanceStreamContent = new createFormXObject(formObject);
appearanceStreamContent.stream = stream.join("\n");
var appearance = {
N: {
'Normal': appearanceStreamContent
}
};
return appearanceStreamContent;
};
var calculateX = function (formObject, text, font, maxFontSize) {
var maxFontSize = maxFontSize || 12;
var font = font || "helvetica";
var returnValue = {
text: "",
fontSize: ""
};
// Remove Brackets
text = (text.substr(0, 1) == '(') ? text.substr(1) : text;
text = (text.substr(text.length - 1) == ')') ? text.substr(0, text.length - 1) : text;
// split into array of words
var textSplit = text.split(' ');
/**
* the color could be ((alpha)||(r,g,b)||(c,m,y,k))
*
* @type {string}
*/
var color = "0 g\n";
var fontSize = maxFontSize; // The Starting fontSize (The Maximum)
var lineSpacing = 2;
var borderPadding = 2;
var height = AcroFormAppearance.internal.getHeight(formObject) || 0;
height = (height < 0) ? -height : height;
var width = AcroFormAppearance.internal.getWidth(formObject) || 0;
width = (width < 0) ? -width : width;
var isSmallerThanWidth = function (i, lastLine, fontSize) {
if (i + 1 < textSplit.length) {
var tmp = lastLine + " " + textSplit[i + 1];
var TextWidth = ((calculateFontSpace(tmp, fontSize + "px", font).width));
var FieldWidth = (width - 2 * borderPadding);
return (TextWidth <= FieldWidth);
} else {
return false;
}
};
fontSize++;
FontSize: while (true) {
var text = "";
fontSize--;
var textHeight = calculateFontSpace("3", fontSize + "px", font).height;
var startY = (formObject.multiline) ? height - fontSize : (height - textHeight) / 2;
startY += lineSpacing;
var startX = -borderPadding;
var lastX = startX, lastY = startY;
var firstWordInLine = 0, lastWordInLine = 0;
var lastLength = 0;
var y = 0;
if (fontSize <= 0) {
// In case, the Text doesn't fit at all
fontSize = 12;
text = "(...) Tj\n";
text += "% Width of Text: " + calculateFontSpace(text, "1px").width + ", FieldWidth:" + width + "\n";
break;
}
lastLength = calculateFontSpace(textSplit[0] + " ", fontSize + "px", font).width;
var lastLine = "";
var lineCount = 0;
Line:
for (var i in textSplit) {
if (textSplit.hasOwnProperty(i)) {
lastLine += textSplit[i] + " ";
// Remove last blank
lastLine = (lastLine.substr(lastLine.length - 1) == " ") ? lastLine.substr(0, lastLine.length - 1) : lastLine;
var key = parseInt(i);
lastLength = calculateFontSpace(lastLine + " ", fontSize + "px", font).width;
var nextLineIsSmaller = isSmallerThanWidth(key, lastLine, fontSize);
var isLastWord = i >= textSplit.length - 1;
if (nextLineIsSmaller && !isLastWord) {
lastLine += " ";
continue; // Line
} else if (!nextLineIsSmaller && !isLastWord) {
if (!formObject.multiline) {
continue FontSize;
} else {
if (((textHeight + lineSpacing) * (lineCount + 2) + lineSpacing) > height) {
// If the Text is higher than the
// FieldObject
continue FontSize;
}
lastWordInLine = key;
// go on
}
} else if (isLastWord) {
lastWordInLine = key;
} else {
if (formObject.multiline && ((textHeight + lineSpacing) * (lineCount + 2) + lineSpacing) > height) {
// If the Text is higher than the FieldObject
continue FontSize;
}
}
var line = '';
for (var x = firstWordInLine; x <= lastWordInLine; x++) {
line += textSplit[x] + ' ';
}
// Remove last blank
line = (line.substr(line.length - 1) == " ") ? line.substr(0, line.length - 1) : line;
// lastLength -= blankSpace.width;
lastLength = calculateFontSpace(line, fontSize + "px", font).width;
// Calculate startX
switch (formObject.Q) {
case 2: // Right justified
startX = (width - lastLength - borderPadding);
break;
case 1:// Q = 1 := Text-Alignment: Center
startX = (width - lastLength) / 2;
break;
case 0:
default:
startX = borderPadding;
break;
}
text += (startX.toFixed(2)) + ' ' + (lastY.toFixed(2)) + ' Td\n';
text += '(' + line + ') Tj\n';
// reset X in PDF
text += (-startX.toFixed(2)) + ' 0 Td\n';
// After a Line, adjust y position
lastY = -(fontSize + lineSpacing);
lastX = startX;
// Reset for next iteration step
lastLength = 0;
firstWordInLine = lastWordInLine + 1;
lineCount++;
lastLine = "";
continue Line;
}
}
break;
}
returnValue.text = text;
returnValue.fontSize = fontSize;
return returnValue;
};
/**
* small workaround for calculating the TextMetric approximately
*
* @param text
* @param fontsize
* @returns {TextMetrics} (Has Height and Width)
*/
var calculateFontSpace = function (text, fontSize, fontType) {
fontType = fontType || "helvetica";
var font = scope.internal.getFont(fontType);
var width = scope.getStringUnitWidth(text, {font : font, fontSize: parseFloat(fontSize), charSpace: 0}) * parseFloat(fontSize);
var height = scope.getStringUnitWidth("3", {font : font, fontSize: parseFloat(fontSize), charSpace: 0}) * parseFloat(fontSize) * 1.5;
var result = {height: height, width: width};
return result;
};
var acroformPluginTemplate = {
fields: [],
xForms: [],
/**
* acroFormDictionaryRoot contains information about the AcroForm
* Dictionary 0: The Event-Token, the AcroFormDictionaryCallback has
* 1: The Object ID of the Root
*/
acroFormDictionaryRoot: null,
/**
* After the PDF gets evaluated, the reference to the root has to be
* reset, this indicates, whether the root has already been printed
* out
*/
printedOut: false,
internal: null,
isInitialized: false
};
var annotReferenceCallback = function () {
var fields = scope.internal.acroformPlugin.acroFormDictionaryRoot.Fields;
for (var i in fields) {
if (fields.hasOwnProperty(i)) {
var formObject = fields[i];
// add Annot Reference!
if (formObject.hasAnnotation) {
// If theres an Annotation Widget in the Form Object, put the
// Reference in the /Annot array
createAnnotationReference.call(scope, formObject);
}
}
}
};
var putForm = function (formObject) {
if (scope.internal.acroformPlugin.printedOut) {
scope.internal.acroformPlugin.printedOut = false;
scope.internal.acroformPlugin.acroFormDictionaryRoot = null;
}
if (!scope.internal.acroformPlugin.acroFormDictionaryRoot) {
initializeAcroForm.call(scope);
}
scope.internal.acroformPlugin.acroFormDictionaryRoot.Fields.push(formObject);
};
/**
* Create the Reference to the widgetAnnotation, so that it gets referenced
* in the Annot[] int the+ (Requires the Annotation Plugin)
*/
var createAnnotationReference = function (object) {
var options = {
type: 'reference',
object: object
};
scope.annotationPlugin.annotations[scope.internal.getPageInfo(object.page).pageNumber].push(options);
};
// Callbacks
var putCatalogCallback = function () {
// Put reference to AcroForm to DocumentCatalog
if (typeof scope.internal.acroformPlugin.acroFormDictionaryRoot != 'undefined') {
// for safety, shouldn't normally be the case
scope.internal.write('/AcroForm ' + scope.internal.acroformPlugin.acroFormDictionaryRoot.objId + ' '
+ 0 + ' R');
} else {
console.log('Root missing...');
}
};
/**
* Adds /Acroform X 0 R to Document Catalog, and creates the AcroForm
* Dictionary
*/
var AcroFormDictionaryCallback = function () {
// Remove event
scope.internal.events.unsubscribe(scope.internal.acroformPlugin.acroFormDictionaryRoot._eventID);
delete scope.internal.acroformPlugin.acroFormDictionaryRoot._eventID;
scope.internal.acroformPlugin.printedOut = true;
};
/**
* Creates the single Fields and writes them into the Document
*
* If fieldArray is set, use the fields that are inside it instead of the
* fields from the AcroRoot (for the FormXObjects...)
*/
var createFieldCallback = function (fieldArray) {
var standardFields = (!fieldArray);
if (!fieldArray) {
// in case there is no fieldArray specified, we want to print out
// the Fields of the AcroForm
// Print out Root
scope.internal.newObjectDeferredBegin(scope.internal.acroformPlugin.acroFormDictionaryRoot.objId);
scope.internal.out(scope.internal.acroformPlugin.acroFormDictionaryRoot.getString());
}
var fieldArray = fieldArray || scope.internal.acroformPlugin.acroFormDictionaryRoot.Kids;
for (var i in fieldArray) {
if (fieldArray.hasOwnProperty(i)) {
var key = i;
var form = fieldArray[i];
var oldRect = form.Rect;
if (form.Rect) {
form.Rect = calculateCoordinates.call(this, form.Rect);
}
// Start Writing the Object
scope.internal.newObjectDeferredBegin(form.objId);
var content = form.objId + " 0 obj\n<<\n";
if (typeof form === "object" && typeof form.getContent === "function") {
content += form.getContent();
}
form.Rect = oldRect;
if (form.hasAppearanceStream && !form.appearanceStreamContent) {
// Calculate Appearance
var appearance = calculateAppearanceStream.call(this, form);
content += "/AP << /N " + appearance + " >>\n";
scope.internal.acroformPlugin.xForms.push(appearance);
}
// Assume AppearanceStreamContent is a Array with N,R,D (at least
// one of them!)
if (form.appearanceStreamContent) {
content += "/AP << ";
// Iterate over N,R and D
for (var k in form.appearanceStreamContent) {
if (form.appearanceStreamContent.hasOwnProperty(k)) {
var value = form.appearanceStreamContent[k];
content += ("/" + k + " ");
content += "<< ";
if (Object.keys(value).length >= 1 || Array.isArray(value)) {
// appearanceStream is an Array or Object!
for (var i in value) {
if (value.hasOwnProperty(i)) {
var obj = value[i];
if (typeof obj === 'function') {
// if Function is referenced, call it in order
// to get the FormXObject
obj = obj.call(this, form);
}
content += ("/" + i + " " + obj + " ");
// In case the XForm is already used, e.g. OffState
// of CheckBoxes, don't add it
if (!(scope.internal.acroformPlugin.xForms.indexOf(obj) >= 0))
scope.internal.acroformPlugin.xForms.push(obj);
}
}
} else {
var obj = value;
if (typeof obj === 'function') {
// if Function is referenced, call it in order to
// get the FormXObject
obj = obj.call(this, form);
}
content += ("/" + i + " " + obj + " \n");
if (!(scope.internal.acroformPlugin.xForms.indexOf(obj) >= 0))
scope.internal.acroformPlugin.xForms.push(obj);
}
content += " >>\n";
}
}
// appearance stream is a normal Object..
content += (">>\n");
}
content += (">>\nendobj\n");
scope.internal.out(content);
}
}
if (standardFields) {
createXFormObjectCallback.call(this, scope.internal.acroformPlugin.xForms);
}
};
var createXFormObjectCallback = function (fieldArray) {
for (var i in fieldArray) {
if (fieldArray.hasOwnProperty(i)) {
var key = i;
var form = fieldArray[i];
// Start Writing the Object
scope.internal.newObjectDeferredBegin(form && form.objId);
var content = "";
if (typeof form === "object" && typeof form.getString === "function") {
content = form.getString();
}
scope.internal.out(content);
delete fieldArray[key];
}
}
};
var initializeAcroForm = function () {
if (this.internal !== undefined && (this.internal.acroformPlugin === undefined || this.internal.acroformPlugin.isInitialized === false)) {
scope = this;
AcroFormField.FieldNum = 0;
this.internal.acroformPlugin = JSON.parse(JSON.stringify(acroformPluginTemplate));
if (this.internal.acroformPlugin.acroFormDictionaryRoot) {
// return;
throw new Error("Exception while creating AcroformDictionary");
}
scaleFactor = scope.internal.scaleFactor;
pageHeight = scope.internal.pageSize.getHeight();
// The Object Number of the AcroForm Dictionary
scope.internal.acroformPlugin.acroFormDictionaryRoot = new AcroFormDictionary();
// add Callback for creating the AcroForm Dictionary
scope.internal.acroformPlugin.acroFormDictionaryRoot._eventID = scope.internal.events.subscribe('postPutResources', AcroFormDictionaryCallback);
scope.internal.events.subscribe('buildDocument', annotReferenceCallback); // buildDocument
// Register event, that is triggered when the DocumentCatalog is
// written, in order to add /AcroForm
scope.internal.events.subscribe('putCatalog', putCatalogCallback);
// Register event, that creates all Fields
scope.internal.events.subscribe('postPutPages', createFieldCallback);
scope.internal.acroformPlugin.isInitialized = true;
}
}
var arrayToPdfArray = function (array) {
if (Array.isArray(array)) {
var content = ' [';
for (var i in array) {
if (array.hasOwnProperty(i)) {
var element = array[i].toString();
content += element;
content += ((i < array.length - 1) ? ' ' : '');
}
}
content += ']';
return content;
}
};
var toPdfString = function (string) {
string = string || "";
// put Bracket at the Beginning of the String
if (string.indexOf('(') !== 0) {
string = '(' + string;
}
if (string.substring(string.length - 1) != ')') {
string += ')';
}
return string;
};
// ##########################
// Classes
// ##########################
var AcroFormPDFObject = function () {
// The Object ID in the PDF Object Model
// todo
var _objId;
Object.defineProperty(this, 'objId', {
get: function () {
if (!_objId) {
_objId = scope.internal.newObjectDeferred();
}
if (!_objId) {
console.log("Couldn't create Object ID");
}
return _objId
},
configurable: false
});
};
AcroFormPDFObject.prototype.toString = function () {
return this.objId + " 0 R";
};
AcroFormPDFObject.prototype.getString = function () {
var res = this.objId + " 0 obj\n<<";
var content = this.getContent();
res += content + ">>\n";
if (this.stream) {
res += "stream\n";
res += this.stream;
res += "\nendstream\n";
}
res += "endobj\n";
return res;
};
AcroFormPDFObject.prototype.getContent = function () {
/**
* Prints out all enumerable Variables from the Object
*
* @param fieldObject
* @returns {string}
*/
var createContentFromFieldObject = function (fieldObject) {
var content = '';
var keys = Object.keys(fieldObject).filter(function (key) {
return (key != 'content' && key != 'appearanceStreamContent' && key.substring(0, 1) != "_");
});
for (var i in keys) {
if (keys.hasOwnProperty(i)) {
var key = keys[i];
var value = fieldObject[key];
/*
* if (key == 'Rect' && value) { value =
* AcroForm.internal.calculateCoordinates.call(jsPDF.API.acroformPlugin.internal,
* value); }
*/
if (value) {
if (Array.isArray(value)) {
content += '/' + key + ' ' + arrayToPdfArray(value) + "\n";
} else if (value instanceof AcroFormPDFObject) {
// In case it is a reference to another PDFObject,
// take the referennce number
content += '/' + key + ' ' + value.objId + " 0 R" + "\n";
} else {
content += '/' + key + ' ' + value + '\n';
}
}
}
}
return content;
};
var object = "";
object += createContentFromFieldObject(this);
return object;
};
var AcroFormXObject = function () {
AcroFormPDFObject.call(this);
this.Type = "/XObject";
this.Subtype = "/Form";
this.FormType = 1;
this.BBox;
this.Matrix;
this.Resources = "2 0 R";
this.PieceInfo;
var _stream;
Object.defineProperty(this, 'Length', {
enumerable: true,
get: function () {
return (_stream !== undefined) ? _stream.length : 0;
}
});
Object.defineProperty(this, 'stream', {
enumerable: false,
set: function (val) {
_stream = val.trim();
},
get: function () {
if (_stream) {
return _stream;
} else {
return null;
}
}
});
};
inherit(AcroFormXObject, AcroFormPDFObject);
// ##### The Objects, the User can Create:
var AcroFormDictionary = function () {
AcroFormPDFObject.call(this);
var _Kids = [];
Object.defineProperty(this, 'Kids', {
enumerable: false,
configurable: true,
get: function () {
if (_Kids.length > 0) {
return _Kids;
} else {
return;
}
}
});
Object.defineProperty(this, 'Fields', {
enumerable: true,
configurable: true,
get: function () {
return _Kids;
}
});
// Default Appearance
this.DA;
};
inherit(AcroFormDictionary, AcroFormPDFObject);
// The Field Object contains the Variables, that every Field needs
// Rectangle for Appearance: lower_left_X, lower_left_Y, width, height
var AcroFormField = function () {
'use strict';
AcroFormPDFObject.call(this);
var _Rect;
Object.defineProperty(this, 'Rect', {
enumerable: true,
configurable: false,
get: function () {
if (!_Rect) {
return;
}
var tmp = _Rect;
// var calculatedRes =
// AcroForm.internal.calculateCoordinates(_Rect); // do
// later!
return tmp
},
set: function (val) {
_Rect = val;
}
});
var _FT = "";
Object.defineProperty(this, 'FT', {
enumerable: true,
set: function (val) {
_FT = val
},
get: function () {
return _FT
}
});
var _F = 4;
Object.defineProperty(this, 'F', {
enumerable: true,
set: function (val) {
_F = val;
},
get: function () {
return _F;
}
});
/**
* The Partial name of the Field Object. It has to be unique.
*/
var _T;
Object.defineProperty(this, 'T', {
enumerable: true,
configurable: false,
set: function (val) {
_T = val;
},
get: function () {
if (!_T || _T.length < 1) {
if (this instanceof AcroFormChildClass) {
// In case of a Child from a Radio´Group, you don't
// need a FieldName!!!
return;
}
return "(FieldObject" + (AcroFormField.FieldNum++) + ")";
}
if (_T.substring(0, 1) == "(" && _T.substring(_T.length - 1)) {
return _T;
}
return "(" + _T + ")";
}
});
var _DA;
// Defines the default appearance (Needed for variable Text)
Object.defineProperty(this, 'DA', {
enumerable: true,
get: function () {
if (!_DA) {
return;
}
return '(' + _DA + ')'
},
set: function (val) {
_DA = val
}
});
var _DV;
// Defines the default value
Object.defineProperty(this, 'DV', {
enumerable: true,
configurable: true,
get: function () {
if (!_DV) {
return;
}
return _DV
},
set: function (val) {
_DV = val
}
});
var _V;
// Defines the default value
Object.defineProperty(this, 'V', {
enumerable: true,
configurable: true,
get: function () {
if (!_V) {
return;
}
return _V
},
set: function (val) {
_V = val
}
});
// this.Type = "/Annot";
// this.Subtype = "/Widget";
Object.defineProperty(this, 'Type', {
enumerable: true,
get: function () {
return (this.hasAnnotation) ? "/Annot" : null;
}
});
Object.defineProperty(this, 'Subtype', {
enumerable: true,
get: function () {
return (this.hasAnnotation) ? "/Widget" : null;
}
});
/**
*
* @type {Array}
*/
this.BG;
Object.defineProperty(this, 'hasAnnotation', {
enumerable: false,
get: function () {
if (this.Rect || this.BC || this.BG) {
return true
}
return false;
}
});
Object.defineProperty(this, 'hasAppearanceStream', {
enumerable: false,
configurable: true,
writable: true
});
Object.defineProperty(this, 'page', {
enumerable: false,
configurable: true,
writable: true
});
};
inherit(AcroFormField, AcroFormPDFObject);
var AcroFormChoiceField = function () {
AcroFormField.call(this);
// Field Type = Choice Field
this.FT = "/Ch";
// options
this.Opt = [];
this.V = '()';
// Top Index
this.TI = 0;
/**
* Defines, whether the
*
* @type {boolean}
*/
var _combo = false;
Object.defineProperty(this, 'combo', {
enumerable: false,