pdf-lib
Version:
Create and modify PDF files with JavaScript
413 lines (412 loc) • 16.5 kB
TypeScript
import PDFDocument from "../PDFDocument";
import PDFField from "./PDFField";
import PDFButton from "./PDFButton";
import PDFCheckBox from "./PDFCheckBox";
import PDFDropdown from "./PDFDropdown";
import PDFOptionList from "./PDFOptionList";
import PDFRadioGroup from "./PDFRadioGroup";
import PDFSignature from "./PDFSignature";
import PDFTextField from "./PDFTextField";
import PDFFont from "../PDFFont";
import { PDFAcroForm, PDFRef } from "../../core";
export interface FlattenOptions {
updateFieldAppearances: boolean;
}
/**
* Represents the interactive form of a [[PDFDocument]].
*
* Interactive forms (sometimes called _AcroForms_) are collections of fields
* designed to gather information from a user. A PDF document may contains any
* number of fields that appear on various pages, all of which make up a single,
* global interactive form spanning the entire document. This means that
* instances of [[PDFDocument]] shall contain at most one [[PDFForm]].
*
* The fields of an interactive form are represented by [[PDFField]] instances.
*/
export default class PDFForm {
/**
* > **NOTE:** You probably don't want to call this method directly. Instead,
* > consider using the [[PDFDocument.getForm]] method, which will create an
* > instance of [[PDFForm]] for you.
*
* Create an instance of [[PDFForm]] from an existing acroForm and embedder
*
* @param acroForm The underlying `PDFAcroForm` for this form.
* @param doc The document to which the form will belong.
*/
static of: (acroForm: PDFAcroForm, doc: PDFDocument) => PDFForm;
/** The low-level PDFAcroForm wrapped by this form. */
readonly acroForm: PDFAcroForm;
/** The document to which this form belongs. */
readonly doc: PDFDocument;
private readonly dirtyFields;
private readonly defaultFontCache;
private constructor();
/**
* Returns `true` if this [[PDFForm]] has XFA data. Most PDFs with form
* fields do not use XFA as it is not widely supported by PDF readers.
*
* > `pdf-lib` does not support creation, modification, or reading of XFA
* > fields.
*
* For example:
* ```js
* const form = pdfDoc.getForm()
* if (form.hasXFA()) console.log('PDF has XFA data')
* ```
* @returns Whether or not this form has XFA data.
*/
hasXFA(): boolean;
/**
* Disconnect the XFA data from this [[PDFForm]] (if any exists). This will
* force readers to fallback to standard fields if the [[PDFDocument]]
* contains any. For example:
*
* For example:
* ```js
* const form = pdfDoc.getForm()
* form.deleteXFA()
* ```
*/
deleteXFA(): void;
/**
* Get all fields contained in this [[PDFForm]]. For example:
* ```js
* const form = pdfDoc.getForm()
* const fields = form.getFields()
* fields.forEach(field => {
* const type = field.constructor.name
* const name = field.getName()
* console.log(`${type}: ${name}`)
* })
* ```
* @returns An array of all fields in this form.
*/
getFields(): PDFField[];
/**
* Get the field in this [[PDFForm]] with the given name. For example:
* ```js
* const form = pdfDoc.getForm()
* const field = form.getFieldMaybe('Page1.Foo.Bar[0]')
* if (field) console.log('Field exists!')
* ```
* @param name A fully qualified field name.
* @returns The field with the specified name, if one exists.
*/
getFieldMaybe(name: string): PDFField | undefined;
/**
* Get the field in this [[PDFForm]] with the given name. For example:
* ```js
* const form = pdfDoc.getForm()
* const field = form.getField('Page1.Foo.Bar[0]')
* ```
* If no field exists with the provided name, an error will be thrown.
* @param name A fully qualified field name.
* @returns The field with the specified name.
*/
getField(name: string): PDFField;
/**
* Get the button field in this [[PDFForm]] with the given name. For example:
* ```js
* const form = pdfDoc.getForm()
* const button = form.getButton('Page1.Foo.Button[0]')
* ```
* An error will be thrown if no field exists with the provided name, or if
* the field exists but is not a button.
* @param name A fully qualified button name.
* @returns The button with the specified name.
*/
getButton(name: string): PDFButton;
/**
* Get the check box field in this [[PDFForm]] with the given name.
* For example:
* ```js
* const form = pdfDoc.getForm()
* const checkBox = form.getCheckBox('Page1.Foo.CheckBox[0]')
* checkBox.check()
* ```
* An error will be thrown if no field exists with the provided name, or if
* the field exists but is not a check box.
* @param name A fully qualified check box name.
* @returns The check box with the specified name.
*/
getCheckBox(name: string): PDFCheckBox;
/**
* Get the dropdown field in this [[PDFForm]] with the given name.
* For example:
* ```js
* const form = pdfDoc.getForm()
* const dropdown = form.getDropdown('Page1.Foo.Dropdown[0]')
* const options = dropdown.getOptions()
* dropdown.select(options[0])
* ```
* An error will be thrown if no field exists with the provided name, or if
* the field exists but is not a dropdown.
* @param name A fully qualified dropdown name.
* @returns The dropdown with the specified name.
*/
getDropdown(name: string): PDFDropdown;
/**
* Get the option list field in this [[PDFForm]] with the given name.
* For example:
* ```js
* const form = pdfDoc.getForm()
* const optionList = form.getOptionList('Page1.Foo.OptionList[0]')
* const options = optionList.getOptions()
* optionList.select(options[0])
* ```
* An error will be thrown if no field exists with the provided name, or if
* the field exists but is not an option list.
* @param name A fully qualified option list name.
* @returns The option list with the specified name.
*/
getOptionList(name: string): PDFOptionList;
/**
* Get the radio group field in this [[PDFForm]] with the given name.
* For example:
* ```js
* const form = pdfDoc.getForm()
* const radioGroup = form.getRadioGroup('Page1.Foo.RadioGroup[0]')
* const options = radioGroup.getOptions()
* radioGroup.select(options[0])
* ```
* An error will be thrown if no field exists with the provided name, or if
* the field exists but is not a radio group.
* @param name A fully qualified radio group name.
* @returns The radio group with the specified name.
*/
getRadioGroup(name: string): PDFRadioGroup;
/**
* Get the signature field in this [[PDFForm]] with the given name.
* For example:
* ```js
* const form = pdfDoc.getForm()
* const signature = form.getSignature('Page1.Foo.Signature[0]')
* ```
* An error will be thrown if no field exists with the provided name, or if
* the field exists but is not a signature.
* @param name A fully qualified signature name.
* @returns The signature with the specified name.
*/
getSignature(name: string): PDFSignature;
/**
* Get the text field in this [[PDFForm]] with the given name.
* For example:
* ```js
* const form = pdfDoc.getForm()
* const textField = form.getTextField('Page1.Foo.TextField[0]')
* textField.setText('Are you designed to act or to be acted upon?')
* ```
* An error will be thrown if no field exists with the provided name, or if
* the field exists but is not a text field.
* @param name A fully qualified text field name.
* @returns The text field with the specified name.
*/
getTextField(name: string): PDFTextField;
/**
* Create a new button field in this [[PDFForm]] with the given name.
* For example:
* ```js
* const font = await pdfDoc.embedFont(StandardFonts.Helvetica)
* const page = pdfDoc.addPage()
*
* const form = pdfDoc.getForm()
* const button = form.createButton('cool.new.button')
*
* button.addToPage('Do Stuff', font, page)
* ```
* An error will be thrown if a field already exists with the provided name.
* @param name The fully qualified name for the new button.
* @returns The new button field.
*/
createButton(name: string): PDFButton;
/**
* Create a new check box field in this [[PDFForm]] with the given name.
* For example:
* ```js
* const font = await pdfDoc.embedFont(StandardFonts.Helvetica)
* const page = pdfDoc.addPage()
*
* const form = pdfDoc.getForm()
* const checkBox = form.createCheckBox('cool.new.checkBox')
*
* checkBox.addToPage(page)
* ```
* An error will be thrown if a field already exists with the provided name.
* @param name The fully qualified name for the new check box.
* @returns The new check box field.
*/
createCheckBox(name: string): PDFCheckBox;
/**
* Create a new dropdown field in this [[PDFForm]] with the given name.
* For example:
* ```js
* const font = await pdfDoc.embedFont(StandardFonts.Helvetica)
* const page = pdfDoc.addPage()
*
* const form = pdfDoc.getForm()
* const dropdown = form.createDropdown('cool.new.dropdown')
*
* dropdown.addToPage(font, page)
* ```
* An error will be thrown if a field already exists with the provided name.
* @param name The fully qualified name for the new dropdown.
* @returns The new dropdown field.
*/
createDropdown(name: string): PDFDropdown;
/**
* Create a new option list field in this [[PDFForm]] with the given name.
* For example:
* ```js
* const font = await pdfDoc.embedFont(StandardFonts.Helvetica)
* const page = pdfDoc.addPage()
*
* const form = pdfDoc.getForm()
* const optionList = form.createOptionList('cool.new.optionList')
*
* optionList.addToPage(font, page)
* ```
* An error will be thrown if a field already exists with the provided name.
* @param name The fully qualified name for the new option list.
* @returns The new option list field.
*/
createOptionList(name: string): PDFOptionList;
/**
* Create a new radio group field in this [[PDFForm]] with the given name.
* For example:
* ```js
* const font = await pdfDoc.embedFont(StandardFonts.Helvetica)
* const page = pdfDoc.addPage()
*
* const form = pdfDoc.getForm()
* const radioGroup = form.createRadioGroup('cool.new.radioGroup')
*
* radioGroup.addOptionToPage('is-dog', page, { y: 0 })
* radioGroup.addOptionToPage('is-cat', page, { y: 75 })
* ```
* An error will be thrown if a field already exists with the provided name.
* @param name The fully qualified name for the new radio group.
* @returns The new radio group field.
*/
createRadioGroup(name: string): PDFRadioGroup;
/**
* Create a new text field in this [[PDFForm]] with the given name.
* For example:
* ```js
* const font = await pdfDoc.embedFont(StandardFonts.Helvetica)
* const page = pdfDoc.addPage()
*
* const form = pdfDoc.getForm()
* const textField = form.createTextField('cool.new.textField')
*
* textField.addToPage(font, page)
* ```
* An error will be thrown if a field already exists with the provided name.
* @param name The fully qualified name for the new radio group.
* @returns The new radio group field.
*/
createTextField(name: string): PDFTextField;
/**
* Flatten all fields in this [[PDFForm]].
*
* Flattening a form field will take the current appearance for each of that
* field's widgets and make them part of their page's content stream. All form
* fields and annotations associated are then removed. Note that once a form
* has been flattened its fields can no longer be accessed or edited.
*
* This operation is often used after filling form fields to ensure a
* consistent appearance across different PDF readers and/or printers.
* Another common use case is to copy a template document with form fields
* into another document. In this scenario you would load the template
* document, fill its fields, flatten it, and then copy its pages into the
* recipient document - the filled fields will be copied over.
*
* For example:
* ```js
* const form = pdfDoc.getForm();
* form.flatten();
* ```
*/
flatten(options?: FlattenOptions): void;
/**
* Remove a field from this [[PDFForm]].
*
* For example:
* ```js
* const form = pdfDoc.getForm();
* const ageField = form.getFields().find(x => x.getName() === 'Age');
* form.removeField(ageField);
* ```
*/
removeField(field: PDFField): void;
/**
* Update the appearance streams for all widgets of all fields in this
* [[PDFForm]]. Appearance streams will only be created for a widget if it
* does not have any existing appearance streams, or the field's value has
* changed (e.g. by calling [[PDFTextField.setText]] or
* [[PDFDropdown.select]]).
*
* For example:
* ```js
* const courier = await pdfDoc.embedFont(StandardFonts.Courier)
* const form = pdfDoc.getForm()
* form.updateFieldAppearances(courier)
* ```
*
* **IMPORTANT:** The default value for the `font` parameter is
* [[StandardFonts.Helvetica]]. Note that this is a WinAnsi font. This means
* that encoding errors will be thrown if any fields contain text with
* characters outside the WinAnsi character set (the latin alphabet).
*
* Embedding a custom font and passing that as the `font`
* parameter allows you to generate appearance streams with non WinAnsi
* characters (assuming your custom font supports them).
*
* > **NOTE:** The [[PDFDocument.save]] method will call this method to
* > update appearances automatically if a form was accessed via the
* > [[PDFDocument.getForm]] method prior to saving.
*
* @param font Optionally, the font to use when creating new appearances.
*/
updateFieldAppearances(font?: PDFFont): void;
/**
* Mark a field as dirty. This will cause its appearance streams to be
* updated by [[PDFForm.updateFieldAppearances]].
* ```js
* const form = pdfDoc.getForm()
* const field = form.getField('foo.bar')
* form.markFieldAsDirty(field.ref)
* ```
* @param fieldRef The reference to the field that should be marked.
*/
markFieldAsDirty(fieldRef: PDFRef): void;
/**
* Mark a field as dirty. This will cause its appearance streams to not be
* updated by [[PDFForm.updateFieldAppearances]].
* ```js
* const form = pdfDoc.getForm()
* const field = form.getField('foo.bar')
* form.markFieldAsClean(field.ref)
* ```
* @param fieldRef The reference to the field that should be marked.
*/
markFieldAsClean(fieldRef: PDFRef): void;
/**
* Returns `true` is the specified field has been marked as dirty.
* ```js
* const form = pdfDoc.getForm()
* const field = form.getField('foo.bar')
* if (form.fieldIsDirty(field.ref)) console.log('Field is dirty')
* ```
* @param fieldRef The reference to the field that should be checked.
* @returns Whether or not the specified field is dirty.
*/
fieldIsDirty(fieldRef: PDFRef): boolean;
getDefaultFont(): PDFFont;
private findWidgetPage;
private findWidgetAppearanceRef;
private findOrCreateNonTerminals;
private findNonTerminal;
private embedDefaultFont;
}
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