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<!DOCTYPE html>
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<meta charset="utf-8">
<title>plugins/acroform.js - Documentation</title>
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<h1 class="page-title">plugins/acroform.js</h1>
<section>
<article>
<pre class="prettyprint source linenums"><code>/**
* jsPDF AcroForm Plugin
* Copyright (c) 2016 Alexander Weidt, https://github.com/BiggA94
*
* Licensed under the MIT License.
* http://opensource.org/licenses/mit-license
*/
(window.AcroForm = function (jsPDFAPI) {
'use strict';
var AcroForm = window.AcroForm;
AcroForm.scale = function (x) {
return (x * (acroformPlugin.internal.scaleFactor / 1));// 1 = (96 / 72)
};
AcroForm.antiScale = function (x) {
return ((1 / acroformPlugin.internal.scaleFactor ) * x);
};
var acroformPlugin = {
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
};
jsPDF.API.acroformPlugin = acroformPlugin;
var annotReferenceCallback = function () {
for (var i in this.acroformPlugin.acroFormDictionaryRoot.Fields) {
var formObject = this.acroformPlugin.acroFormDictionaryRoot.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(this, formObject);
}
}
};
var createAcroForm = function () {
if (this.acroformPlugin.acroFormDictionaryRoot) {
//return;
throw new Error("Exception while creating AcroformDictionary");
}
// The Object Number of the AcroForm Dictionary
this.acroformPlugin.acroFormDictionaryRoot = new AcroForm.AcroFormDictionary();
this.acroformPlugin.internal = this.internal;
// add Callback for creating the AcroForm Dictionary
this.acroformPlugin.acroFormDictionaryRoot._eventID = this.internal.events.subscribe('postPutResources', AcroFormDictionaryCallback);
this.internal.events.subscribe('buildDocument', annotReferenceCallback); //buildDocument
// Register event, that is triggered when the DocumentCatalog is written, in order to add /AcroForm
this.internal.events.subscribe('putCatalog', putCatalogCallback);
// Register event, that creates all Fields
this.internal.events.subscribe('postPutPages', createFieldCallback);
};
/**
* 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
};
jsPDF.API.annotationPlugin.annotations[this.internal.getPageInfo(object.page).pageNumber].push(options);
};
var putForm = function (formObject) {
if (this.acroformPlugin.printedOut) {
this.acroformPlugin.printedOut = false;
this.acroformPlugin.acroFormDictionaryRoot = null;
}
if (!this.acroformPlugin.acroFormDictionaryRoot) {
createAcroForm.call(this);
}
this.acroformPlugin.acroFormDictionaryRoot.Fields.push(formObject);
};
// Callbacks
var putCatalogCallback = function () {
//Put reference to AcroForm to DocumentCatalog
if (typeof this.acroformPlugin.acroFormDictionaryRoot != 'undefined') { // for safety, shouldn't normally be the case
this.internal.write('/AcroForm ' + this.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
this.internal.events.unsubscribe(this.acroformPlugin.acroFormDictionaryRoot._eventID);
delete this.acroformPlugin.acroFormDictionaryRoot._eventID;
this.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
this.internal.newObjectDeferredBegin(this.acroformPlugin.acroFormDictionaryRoot.objId);
this.internal.out(this.acroformPlugin.acroFormDictionaryRoot.getString());
}
var fieldArray = fieldArray || this.acroformPlugin.acroFormDictionaryRoot.Kids;
for (var i in fieldArray) {
var key = i;
var form = fieldArray[i];
var oldRect = form.Rect;
if (form.Rect) {
form.Rect = AcroForm.internal.calculateCoordinates.call(this, form.Rect);
}
// Start Writing the Object
this.internal.newObjectDeferredBegin(form.objId);
var content = "";
content += (form.objId + " 0 obj\n");
content += ("<<\n" + form.getContent());
form.Rect = oldRect;
if (form.hasAppearanceStream && !form.appearanceStreamContent) {
// Calculate Appearance
var appearance = AcroForm.internal.calculateAppearanceStream.call(this, form);
content += "/AP << /N " + appearance + " >>\n";
this.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) {
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) {
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 (!(this.acroformPlugin.xForms.indexOf(obj) >= 0))
this.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 (!(this.acroformPlugin.xForms.indexOf(obj) >= 0))
this.acroformPlugin.xForms.push(obj);
}
content += " >>\n";
}
// appearance stream is a normal Object..
content += (">>\n");
}
content += (">>\nendobj\n");
this.internal.out(content);
}
if (standardFields) {
createXFormObjectCallback.call(this, this.acroformPlugin.xForms);
}
};
var createXFormObjectCallback = function (fieldArray) {
for (var i in fieldArray) {
var key = i;
var form = fieldArray[i];
// Start Writing the Object
this.internal.newObjectDeferredBegin(form && form.objId);
var content = "";
content += form ? form.getString() : '';
this.internal.out(content);
delete fieldArray[key];
}
};
// Public:
jsPDFAPI.addField = function (fieldObject) {
//var opt = parseOptions(fieldObject);
if (fieldObject instanceof AcroForm.TextField) {
addTextField.call(this, fieldObject);
} else if (fieldObject instanceof AcroForm.ChoiceField) {
addChoiceField.call(this, fieldObject);
} else if (fieldObject instanceof AcroForm.Button) {
addButton.call(this, fieldObject);
} else if (fieldObject instanceof AcroForm.ChildClass) {
putForm.call(this, fieldObject);
} else if (fieldObject) {
// try to put..
putForm.call(this, fieldObject);
}
fieldObject.page = this.acroformPlugin.internal.getCurrentPageInfo().pageNumber;
return this;
};
// ############### sort in:
/**
* Button
* FT = Btn
*/
var addButton = function (options) {
var options = options || new AcroForm.Field();
options.FT = '/Btn';
/**
* 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 flags = options.Ff || 0;
// 17, Pushbutton
if (options.pushbutton) {
// Options.pushbutton should be 1 or 0
flags = AcroForm.internal.setBitPosition(flags, 17);
delete options.pushbutton;
}
//16, Radio
if (options.radio) {
//flags = options.Ff | options.radio << 15;
flags = AcroForm.internal.setBitPosition(flags, 16);
delete options.radio;
}
// 15, NoToggleToOff (Radio buttons only
if (options.noToggleToOff) {
//flags = options.Ff | options.noToggleToOff << 14;
flags = AcroForm.internal.setBitPosition(flags, 15);
//delete options.noToggleToOff;
}
// In case, there is no Flag set, it is a check-box
options.Ff = flags;
putForm.call(this, options);
};
var addTextField = function (options) {
var options = options || new AcroForm.Field();
options.FT = '/Tx';
/**
* 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 flags = options.Ff || 0;
// 13, multiline
if (options.multiline) {
// Set Flag
flags = flags | (1 << 12);
// Remove multiline from FieldObject
//delete options.multiline;
}
// 14, Password
if (options.password) {
flags = flags | (1 << 13);
//delete options.password;
}
// 21, FileSelect, PDF 1.4...
if (options.fileSelect) {
flags = flags | (1 << 20);
//delete options.fileSelect;
}
// 23, DoNotSpellCheck, PDF 1.4...
if (options.doNotSpellCheck) {
flags = flags | (1 << 22);
//delete options.doNotSpellCheck;
}
// 24, DoNotScroll, PDF 1.4...
if (options.doNotScroll) {
flags = flags | (1 << 23);
//delete options.doNotScroll;
}
options.Ff = options.Ff || flags;
// Add field
putForm.call(this, options);
};
var addChoiceField = function (opt) {
var options = opt || new AcroForm.Field();
options.FT = '/Ch';
/**
* 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 flags = options.Ff || 0;
// 18, Combo (If not set, the choiceField is a listBox!!)
if (options.combo) {
// Set Flag
flags = AcroForm.internal.setBitPosition(flags, 18);
// Remove combo from FieldObject
delete options.combo;
}
// 19, Edit
if (options.edit) {
flags = AcroForm.internal.setBitPosition(flags, 19);
delete options.edit;
}
// 20, Sort
if (options.sort) {
flags = AcroForm.internal.setBitPosition(flags, 20);
delete options.sort;
}
// 22, MultiSelect (PDF 1.4)
if (options.multiSelect && this.internal.getPDFVersion() >= 1.4) {
flags = AcroForm.internal.setBitPosition(flags, 22);
delete options.multiSelect;
}
// 23, DoNotSpellCheck (PDF 1.4)
if (options.doNotSpellCheck && this.internal.getPDFVersion() >= 1.4) {
flags = AcroForm.internal.setBitPosition(flags, 23);
delete options.doNotSpellCheck;
}
options.Ff = flags;
//options.hasAnnotation = true;
// Add field
putForm.call(this, options);
};
})(jsPDF.API);
var AcroForm = window.AcroForm;
AcroForm.internal = {};
AcroForm.createFormXObject = function (formObject) {
var xobj = new AcroForm.FormXObject;
var height = AcroForm.Appearance.internal.getHeight(formObject) || 0;
var width = AcroForm.Appearance.internal.getWidth(formObject) || 0;
xobj.BBox = [0, 0, width, height];
return xobj;
};
// Contains Methods for creating standard appearances
AcroForm.Appearance = {
CheckBox: {
createAppearanceStream: function () {
var appearance = {
N: {
On: AcroForm.Appearance.CheckBox.YesNormal
},
D: {
On: AcroForm.Appearance.CheckBox.YesPushDown,
Off: AcroForm.Appearance.CheckBox.OffPushDown
}
};
return appearance;
},
/**
* If any other icons are needed, the number between the brackets can be changed
* @returns {string}
*/
createMK: function () {
// 3-> Hook
return "<< /CA (3)>>";
},
/**
* Returns the standard On Appearance for a CheckBox
* @returns {AcroForm.FormXObject}
*/
YesPushDown: function (formObject) {
var xobj = AcroForm.createFormXObject(formObject);
var stream = "";
// F13 is ZapfDingbats (Symbolic)
formObject.Q = 1; // set text-alignment as centered
var calcRes = AcroForm.internal.calculateX(formObject, "3", "ZapfDingbats", 50);
stream += "0.749023 g\n\
0 0 " + AcroForm.Appearance.internal.getWidth(formObject) + " " + AcroForm.Appearance.internal.getHeight(formObject) + " re\n\
f\n\
BMC\n\
q\n\
0 0 1 rg\n\
/F13 " + calcRes.fontSize + " Tf 0 g\n\
BT\n";
stream += calcRes.text;
stream += "ET\n\
Q\n\
EMC\n";
xobj.stream = stream;
return xobj;
},
YesNormal: function (formObject) {
var xobj = AcroForm.createFormXObject(formObject);
var stream = "";
formObject.Q = 1; // set text-alignment as centered
var calcRes = AcroForm.internal.calculateX(formObject, "3", "ZapfDingbats", AcroForm.Appearance.internal.getHeight(formObject) * 0.9);
stream += "1 g\n\
0 0 " + AcroForm.Appearance.internal.getWidth(formObject) + " " + AcroForm.Appearance.internal.getHeight(formObject) + " re\n\
f\n\
q\n\
0 0 1 rg\n\
0 0 " + (AcroForm.Appearance.internal.getWidth(formObject) - 1) + " " + (AcroForm.Appearance.internal.getHeight(formObject) - 1) + " re\n\
W\n\
n\n\
0 g\n\
BT\n\
/F13 " + calcRes.fontSize + " Tf 0 g\n";
stream += calcRes.text;
stream += "ET\n\
Q\n";
xobj.stream = stream;
return xobj;
},
/**
* Returns the standard Off Appearance for a CheckBox
* @returns {AcroForm.FormXObject}
*/
OffPushDown: function (formObject) {
var xobj = AcroForm.createFormXObject(formObject);
var stream = "";
stream += "0.749023 g\n\
0 0 " + AcroForm.Appearance.internal.getWidth(formObject) + " " + AcroForm.Appearance.internal.getHeight(formObject) + " re\n\
f\n";
xobj.stream = stream;
return xobj;
}
},
RadioButton: {
Circle: {
createAppearanceStream: function (name) {
var appearanceStreamContent = {
D: {
'Off': AcroForm.Appearance.RadioButton.Circle.OffPushDown
},
N: {}
};
appearanceStreamContent.N[name] = AcroForm.Appearance.RadioButton.Circle.YesNormal;
appearanceStreamContent.D[name] = AcroForm.Appearance.RadioButton.Circle.YesPushDown;
return appearanceStreamContent;
},
createMK: function () {
return "<< /CA (l)>>";
},
YesNormal: function (formObject) {
var xobj = AcroForm.createFormXObject(formObject);
var stream = "";
// Make the Radius of the Circle relative to min(height, width) of formObject
var DotRadius = (AcroForm.Appearance.internal.getWidth(formObject) <= AcroForm.Appearance.internal.getHeight(formObject)) ?
AcroForm.Appearance.internal.getWidth(formObject) / 4 : AcroForm.Appearance.internal.getHeight(formObject) / 4;
// The Borderpadding...
DotRadius *= 0.9;
var c = AcroForm.Appearance.internal.Bezier_C;
/*
The Following is a Circle created with Bezier-Curves.
*/
stream += "q\n\
1 0 0 1 " + AcroForm.Appearance.internal.getWidth(formObject) / 2 + " " + AcroForm.Appearance.internal.getHeight(formObject) / 2 + " cm\n\
" + DotRadius + " 0 m\n\
" + DotRadius + " " + DotRadius * c + " " + DotRadius * c + " " + DotRadius + " 0 " + DotRadius + " c\n\
-" + DotRadius * c + " " + DotRadius + " -" + DotRadius + " " + DotRadius * c + " -" + DotRadius + " 0 c\n\
-" + DotRadius + " -" + DotRadius * c + " -" + DotRadius * c + " -" + DotRadius + " 0 -" + DotRadius + " c\n\
" + DotRadius * c + " -" + DotRadius + " " + DotRadius + " -" + DotRadius * c + " " + DotRadius + " 0 c\n\
f\n\
Q\n";
xobj.stream = stream;
return xobj;
},
YesPushDown: function (formObject) {
var xobj = AcroForm.createFormXObject(formObject);
var stream = "";
var DotRadius = (AcroForm.Appearance.internal.getWidth(formObject) <= AcroForm.Appearance.internal.getHeight(formObject)) ?
AcroForm.Appearance.internal.getWidth(formObject) / 4 : AcroForm.Appearance.internal.getHeight(formObject) / 4;
// The Borderpadding...
DotRadius *= 0.9;
// Save results for later use; no need to waste processor ticks on doing math
var k = DotRadius * 2;
// var c = AcroForm.Appearance.internal.Bezier_C;
var kc = k * AcroForm.Appearance.internal.Bezier_C;
var dc = DotRadius * AcroForm.Appearance.internal.Bezier_C;
// stream += "0.749023 g\n\
// q\n\
// 1 0 0 1 " + AcroForm.Appearance.internal.getWidth(formObject) / 2 + " " + AcroForm.Appearance.internal.getHeight(formObject) / 2 + " cm\n\
// " + DotRadius * 2 + " 0 m\n\
// " + DotRadius * 2 + " " + DotRadius * 2 * c + " " + DotRadius * 2 * c + " " + DotRadius * 2 + " 0 " + DotRadius * 2 + " c\n\
// -" + DotRadius * 2 * c + " " + DotRadius * 2 + " -" + DotRadius * 2 + " " + DotRadius * 2 * c + " -" + DotRadius * 2 + " 0 c\n\
// -" + DotRadius * 2 + " -" + DotRadius * 2 * c + " -" + DotRadius * 2 * c + " -" + DotRadius * 2 + " 0 -" + DotRadius * 2 + " c\n\
// " + DotRadius * 2 * c + " -" + DotRadius * 2 + " " + DotRadius * 2 + " -" + DotRadius * 2 * c + " " + DotRadius * 2 + " 0 c\n\
// f\n\
// Q\n\
// 0 g\n\
// q\n\
// 1 0 0 1 " + AcroForm.Appearance.internal.getWidth(formObject) / 2 + " " + AcroForm.Appearance.internal.getHeight(formObject) / 2 + " cm\n\
// " + DotRadius + " 0 m\n\
// " + DotRadius + " " + DotRadius * c + " " + DotRadius * c + " " + DotRadius + " 0 " + DotRadius + " c\n\
// -" + DotRadius * c + " " + DotRadius + " -" + DotRadius + " " + DotRadius * c + " -" + DotRadius + " 0 c\n\
// -" + DotRadius + " -" + DotRadius * c + " -" + DotRadius * c + " -" + DotRadius + " 0 -" + DotRadius + " c\n\
// " + DotRadius * c + " -" + DotRadius + " " + DotRadius + " -" + DotRadius * c + " " + DotRadius + " 0 c\n\
// f\n\
// Q\n";
// FASTER VERSION with less processor ticks spent on math operations
stream += "0.749023 g\n\
q\n\
1 0 0 1 " + AcroForm.Appearance.internal.getWidth(formObject) / 2 + " " + AcroForm.Appearance.internal.getHeight(formObject) / 2 + " cm\n\
" + k + " 0 m\n\
" + k + " " + kc + " " + kc + " " + k + " 0 " + k + " c\n\
-" + kc + " " + k + " -" + k + " " + kc + " -" + k + " 0 c\n\
-" + k + " -" + kc + " -" + kc + " -" + k + " 0 -" + k + " c\n\
" + kc + " -" + k + " " + k + " -" + kc + " " + k + " 0 c\n\
f\n\
Q\n\
0 g\n\
q\n\
1 0 0 1 " + AcroForm.Appearance.internal.getWidth(formObject) / 2 + " " + AcroForm.Appearance.internal.getHeight(formObject) / 2 + " cm\n\
" + DotRadius + " 0 m\n\
" + DotRadius + " " + dc + " " + dc + " " + DotRadius + " 0 " + DotRadius + " c\n\
-" + dc + " " + DotRadius + " -" + DotRadius + " " + dc + " -" + DotRadius + " 0 c\n\
-" + DotRadius + " -" + dc + " -" + dc + " -" + DotRadius + " 0 -" + DotRadius + " c\n\
" + dc + " -" + DotRadius + " " + DotRadius + " -" + dc + " " + DotRadius + " 0 c\n\
f\n\
Q\n";
xobj.stream = stream;
return xobj;
},
OffPushDown: function (formObject) {
var xobj = AcroForm.createFormXObject(formObject);
var stream = "";
var DotRadius = (AcroForm.Appearance.internal.getWidth(formObject) <= AcroForm.Appearance.internal.getHeight(formObject)) ?
AcroForm.Appearance.internal.getWidth(formObject) / 4 : AcroForm.Appearance.internal.getHeight(formObject) / 4;
// The Borderpadding...
DotRadius *= 0.9;
// Save results for later use; no need to waste processor ticks on doing math
var k = DotRadius * 2;
// var c = AcroForm.Appearance.internal.Bezier_C;
var kc = k * AcroForm.Appearance.internal.Bezier_C;
// stream += "0.749023 g\n\
// q\n\
// 1 0 0 1 " + AcroForm.Appearance.internal.getWidth(formObject) / 2 + " " + AcroForm.Appearance.internal.getHeight(formObject) / 2 + " cm\n\
// " + DotRadius * 2 + " 0 m\n\
// " + DotRadius * 2 + " " + DotRadius * 2 * c + " " + DotRadius * 2 * c + " " + DotRadius * 2 + " 0 " + DotRadius * 2 + " c\n\
// -" + DotRadius * 2 * c + " " + DotRadius * 2 + " -" + DotRadius * 2 + " " + DotRadius * 2 * c + " -" + DotRadius * 2 + " 0 c\n\
// -" + DotRadius * 2 + " -" + DotRadius * 2 * c + " -" + DotRadius * 2 * c + " -" + DotRadius * 2 + " 0 -" + DotRadius * 2 + " c\n\
// " + DotRadius * 2 * c + " -" + DotRadius * 2 + " " + DotRadius * 2 + " -" + DotRadius * 2 * c + " " + DotRadius * 2 + " 0 c\n\
// f\n\
// Q\n";
// FASTER VERSION with less processor ticks spent on math operations
stream += "0.749023 g\n\
q\n\
1 0 0 1 " + AcroForm.Appearance.internal.getWidth(formObject) / 2 + " " + AcroForm.Appearance.internal.getHeight(formObject) / 2 + " cm\n\
" + k + " 0 m\n\
" + k + " " + kc + " " + kc + " " + k + " 0 " + k + " c\n\
-" + kc + " " + k + " -" + k + " " + kc + " -" + k + " 0 c\n\
-" + k + " -" + kc + " -" + kc + " -" + k + " 0 -" + k + " c\n\
" + kc + " -" + k + " " + k + " -" + kc + " " + k + " 0 c\n\
f\n\
Q\n";
xobj.stream = stream;
return xobj;
},
},
Cross: {
/**
* Creates the Actual AppearanceDictionary-References
* @param name
* @returns
*/
createAppearanceStream: function (name) {
var appearanceStreamContent = {
D: {
'Off': AcroForm.Appearance.RadioButton.Cross.OffPushDown
},
N: {}
};
appearanceStreamContent.N[name] = AcroForm.Appearance.RadioButton.Cross.YesNormal;
appearanceStreamContent.D[name] = AcroForm.Appearance.RadioButton.Cross.YesPushDown;
return appearanceStreamContent;
},
createMK: function () {
return "<< /CA (8)>>";
},
YesNormal: function (formObject) {
var xobj = AcroForm.createFormXObject(formObject);
var stream = "";
var cross = AcroForm.Appearance.internal.calculateCross(formObject);
stream += "q\n\
1 1 " + (AcroForm.Appearance.internal.getWidth(formObject) - 2) + " " + (AcroForm.Appearance.internal.getHeight(formObject) - 2) + " re\n\
W\n\
n\n\
" + cross.x1.x + " " + cross.x1.y + " m\n\
" + cross.x2.x + " " + cross.x2.y + " l\n\
" + cross.x4.x + " " + cross.x4.y + " m\n\
" + cross.x3.x + " " + cross.x3.y + " l\n\
s\n\
Q\n";
xobj.stream = stream;
return xobj;
},
YesPushDown: function (formObject) {
var xobj = AcroForm.createFormXObject(formObject);
var cross = AcroForm.Appearance.internal.calculateCross(formObject);
var stream = "";
stream += "0.749023 g\n\
0 0 " + AcroForm.Appearance.internal.getWidth(formObject) + " " + AcroForm.Appearance.internal.getHeight(formObject) + " re\n\
f\n\
q\n\
1 1 " + (AcroForm.Appearance.internal.getWidth(formObject) - 2) + " " + (AcroForm.Appearance.internal.getHeight(formObject) - 2) + " re\n\
W\n\
n\n\
" + cross.x1.x + " " + cross.x1.y + " m\n\
" + cross.x2.x + " " + cross.x2.y + " l\n\
" + cross.x4.x + " " + cross.x4.y + " m\n\
" + cross.x3.x + " " + cross.x3.y + " l\n\
s\n\
Q\n";
xobj.stream = stream;
return xobj;
},
OffPushDown: function (formObject) {
var xobj = AcroForm.createFormXObject(formObject);
var stream = "";
stream += "0.749023 g\n\
0 0 " + AcroForm.Appearance.internal.getWidth(formObject) + " " + AcroForm.Appearance.internal.getHeight(formObject) + " re\n\
f\n";
xobj.stream = stream;
return xobj;
}
},
},
/**
* Returns the standard Appearance
* @returns {AcroForm.FormXObject}
*/
createDefaultAppearanceStream: function (formObject) {
var stream = "";
// Set Helvetica to Standard Font (size: auto)
// Color: Black
stream += "/Helv 0 Tf 0 g";
return stream;
}
};
AcroForm.Appearance.internal = {
Bezier_C: 0.551915024494,
calculateCross: function (formObject) {
var min = function (x, y) {
return (x > y) ? y : x;
};
var width = AcroForm.Appearance.internal.getWidth(formObject);
var height = AcroForm.Appearance.internal.getHeight(formObject);
var a = min(width, height);
var crossSize = a;
var borderPadding = 2; // The Padding in px
var cross = {
x1: { // upperLeft
x: (width - a) / 2,
y: ((height - a) / 2) + a,//height - borderPadding
},
x2: { // lowerRight
x: ((width - a) / 2) + a,
y: ((height - a) / 2)//borderPadding
},
x3: { // lowerLeft
x: (width - a) / 2,
y: ((height - a) / 2)//borderPadding
},
x4: { // upperRight
x: ((width - a) / 2) + a,
y: ((height - a) / 2) + a,//height - borderPadding
}
};
return cross;
},
};
AcroForm.Appearance.internal.getWidth = function (formObject) {
return formObject.Rect[2];//(formObject.Rect[2] - formObject.Rect[0]) || 0;
};
AcroForm.Appearance.internal.getHeight = function (formObject) {
return formObject.Rect[3];//(formObject.Rect[1] - formObject.Rect[3]) || 0;
};
// ##########################
//### For inheritance:
AcroForm.internal.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;
};
// ### Handy Functions:
AcroForm.internal.arrayToPdfArray = function (array) {
if (Array.isArray(array)) {
var content = ' [';
for (var i in array) {
var element = array[i].toString();
content += element;
content += ((i < array.length - 1) ? ' ' : '');
}
content += ']';
return content;
}
};
AcroForm.internal.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
// ##########################
AcroForm.PDFObject = function () {
// The Object ID in the PDF Object Model
// todo
var _objId;
Object.defineProperty(this, 'objId', {
get: function () {
if (!_objId) {
if (this.internal) {
_objId = this.internal.newObjectDeferred();
} else if (jsPDF.API.acroformPlugin.internal) {
// todo - find better option, that doesn't rely on a Global Static var
_objId = jsPDF.API.acroformPlugin.internal.newObjectDeferred();
}
}
if (!_objId) {
console.log("Couldn't create Object ID");
}
return _objId
},
configurable: false
});
};
AcroForm.PDFObject.prototype.toString = function () {
return this.objId + " 0 R";
};
AcroForm.PDFObject.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 += "endstream\n";
}
res += "endobj\n";
return res;
};
AcroForm.PDFObject.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) {
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 + ' ' + AcroForm.internal.arrayToPdfArray(value) + "\n";
} else if (value instanceof AcroForm.PDFObject) {
// 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;
};
AcroForm.FormXObject = function () {
AcroForm.PDFObject.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;
},
get: function () {
if (_stream) {
return _stream;
} else {
return null;
}
}
});
};
AcroForm.internal.inherit(AcroForm.FormXObject, AcroForm.PDFObject);
AcroForm.AcroFormDictionary = function () {
AcroForm.PDFObject.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;
};
AcroForm.internal.inherit(AcroForm.AcroFormDictionary, AcroForm.PDFObject);