PDFJS Express WebViewer Class: Document

new Document(id, type)

Constructs a new empty Document, representing a document with individual pages (canvases) that can be displayed on screen and printed.

Parameters:

Name	Type	Description
`id`	string	Unique string identifier for the document
`type`	string	The type of document that should be instantiated. Values are 'xod' for XOD documents, 'pdf' for PDF, JPG or PNG documents, 'office' for MS Office documents and 'blackbox' for WebViewer Server documents

Methods

<static> registerDocumentType(type, source, exposedFuncs)

Parameters:

Name	Type	Description
`type`	String	Name of the new document type
`source`	any	Class of the new document
`exposedFuncs`	Array.<string>	An array containing strings of the function names to expose on the document object

Returns:

Type: Boolean

<static> unregisterDocumentType(type)

Unregister existing document type form Document class

Parameters:

Name	Type	Description
`type`	String	Name of registered document type

Returns:

Type: Boolean

cancelLoadCanvas(id)

Cancels the loadCanvasAsync call corresponding to the passed in id

Parameters:

Name	Type	Description
`id`	number	The id returned from the loadCanvasAsync call that will be cancelled.

cancelLoadThumbnail(requestId)

Cancels the request made for thumbnail with the specified request Id

Parameters:

Name	Type	Description
`requestId`	number	The id returned from loadThumbnailAsync

cancelOfflineModeDownload()

Cancels a download for offline mode in progress. If there is no current download then this does nothing.

cropPages(pageArray, topMargin, botMargin, leftMargin, rightMargin)

[PDF Document only] Crop the given pages by the given margins. Note that this method will need to wait for the entire file to be downloaded before the change is applied.

Parameters:

Name	Type	Description
`pageArray`	Array.<number>	an array of page numbers to crop
`topMargin`	number	how much to crop from the top
`botMargin`	number	how much to crop from the bottom
`leftMargin`	number	how much to crop from the left
`rightMargin`	number	how much to crop from the right

Returns:

a promise that resolves to an object describing the updated state of the pages in the document

Type: Promise.<object>

documentCompletePromise()

Returns:

A promise that resolves when all of the page information is available for the document

Type: Promise.<any>

enableColorSeparations(enabled)

[PDF Document only] Enables or disables the color separations feature for rendering.

Parameters:

Name	Type	Description
`enabled`	boolean	Whether to enable or disable color separations rendering.

enableSeparation(name, enabled)

[PDF Document only] Enables or disables the rendering of a particular color separation.

Parameters:

Name	Type	Description
`name`	string	The name of the separation
`enabled`	boolean	Whether to enable or disable the separation

extractPages(pageArray, xfdfString)

[PDF Document only] Extract the given pages from the document. Note that this method will need to wait for the entire file to be downloaded before the change is applied.

Parameters:

Name	Type	Description
`pageArray`	Array.<number>	an array of the page numbers to extract
`xfdfString`	string	an XFDF string to merge into the document before extracting

Returns:

a promise that resolves on completion

Type: Promise.<any>

extractPDFNetLayersContext(layers)

[PDF Document only][PDFNetJS full only] Get the updated context of a document as a PDFNet object.

Parameters:

Name	Type	Description
`layers`		layers

Returns:

a promise that resolves to a PDFNet Context object representing the current layers/OCG state.

Type: Promise.<object>

extractXFDF(pages)

Gets the XFDF data for the document's internal annotations.

Parameters:

Name	Type	Description
`pages`	Array.<number>	An array of page numbers to get the XFDF data for the document. Note: Only one page is supported by XOD documents.

Returns:

a promise the resolves to an object with an xfdfString property and a pages property where pages is the array of page numbers that annotations were extracted from

Type: Promise.<CoreControls.Document.XFDFInfo>

getBookmarks()

Returns an array containing the bookmarks in the document.

Returns:

A promise resolving to an array containing the bookmarks in the current document.

Type: Promise.<Array.<CoreControls.Bookmark>>

getColorSeparations()

[PDF Document only] Gets the color separations available on this document.

Returns:

The color separations of the document

Type: Array.<any>

getDownloadLink( [options])

[PDFTron Server only] Provides a URL to a the PDF with annotations and watermarks merged.

Parameters:

Name Type Argument Description

options

Object

An optional object containing download options and parameters.

Properties

Name	Type	Argument	Description
`filename`	string	<optional>	The preferred name for the downloaded file on the client side. This has no effect on the backend target of the returned link, only the filename used by the browser when the link is accessed.

Returns:

Will be null if not supported. Otherwise a promise that resolves to an object with a `url` property pointing to the printable PDF.

Type: Promise.<object> | null

getFileData()

[PDF/Office Document only] Asynchronously saves the document and provides the result as an ArrayBuffer. To include annotations in the saved document, please provide an object with the xfdfString property.

Returns:

a promise that resolves to an array buffer containing PDF document bytes.

Type: Promise.<Array.<any>>

getFilename()

Get the document filename used for downloading.

Returns:

filename of the document.

Type: string

getLayersArray()

[PDF Document only] Get an array describing the layers/OCG structure in the document. Each entry in the array is a layer entry the form {obj: string, visible: boolean, name: titleString, children: [layerEntry1, layerEntry2...]}. The children entry contains an array which may contain additional layer entries. Both the obj and visible are optional. See the layers sample for an example of how to use getLayersArray and setLayersArray.

Returns:

A promise that resolves to an array representing the layers in the PDF document

Type: Promise.<Array.<any>>

getLinks(pageIndex)

Returns an array containing the links on the specified page of the document.

Parameters:

Name	Type	Description
`pageIndex`	number	The page number, zero-indexed, that the links are on.

Returns:

An array containing the links on the specified page of the document.

Type: Array.<string>

getMetadata()

Returns an object with metadata associated with the document.

Returns:

A promise that resolves to an object with document metadata

Type: Promise.<object>

getOfflineModeEnabled()

Returns whether offline mode is currently enabled or not.

getPageCount()

Returns the number of pages in a document.

Returns:

The number of the pages in the current document.

Type: number

getPageInfo(pageIndex)

Returns an object containing the width and height of a page.

Parameters:

Name	Type	Description
`pageIndex`	number	The page number, zero-indexed, of the requested page.

Returns:

An object representing the page info. Contains the properties "width" and "height".

Type: CoreControls.Document.PageInfo

getPageMatrix(pageIndex)

Returns an object representing the transformation matrix for the page.

Parameters:

Name	Type	Description
`pageIndex`	number	The page number, zero-indexed, of the requested page.

Returns:

An object representing the page matrix.

Type: object

getPageRotation(pageIndex)

Returns the internal degrees of rotation of a page.

Parameters:

Name	Type	Description
`pageIndex`	number	The page number, zero-indexed, of the requested page.

Returns:

The internal degrees of rotation of a page. (0, 90, 180 or 270)

Type: number

getPDFCoordinates(pageIndex, x, y)

Returns an object with the original x and y coordinates converted to PDF coordinates for the page.

Parameters:

Name	Type	Description
`pageIndex`	number	The page number, zero-indexed, that the coordinates are on
`x`	number	The x coordinate
`y`	number	The y coordinate

Returns:

An object with the x and y PDF coordinates

Type: object

getPDFDoc()

Returns the PDFNet.PDFDoc object associated with the document. Note that the full API is required to be enabled and WebViewer Server cannot be enabled.

Returns:

A promise that resolves to the PDFDoc object.

Type: Promise.<PDFNet.PDFDoc>

getTextPosition(pageIndex, textStartIndex, textEndIndex, onComplete)

Gets quads for each of the characters from start to end index.

Parameters:

Name	Type	Description
`pageIndex`	number	The page number, zero-indexed, that the text is on.
`textStartIndex`	number	The position where to start getting character quads from.
`textEndIndex`	number	The position (up to, but not including) where to finish getting characters.
`onComplete`	function	The callback to call when the text positions are ready. Accepts a quads object as a parameter. Quads is an array of objects with (x1,y1,x2,y2,x3,y3,x4,y4)

getType()

Gets the type of the document.

Returns:

The type of the document (xod, pdf, office, blackbox)

Type: string

getViewerCoordinates(pageIndex, x, y)

Returns an object with the original x and y PDF coordinates converted to Viewer coordinates for the page.

Parameters:

Name	Type	Description
`pageIndex`	number	The page number, zero-indexed, that the coordinates are on
`x`	number	The x coordinate
`y`	number	The y coordinate

Returns:

An object with the x and y Viewer coordinates

Type: object

getXODCoordinates(pageIndex, x, y)

Returns an object with the original x and y PDF coordinates converted to XOD coordinates for the page.

Parameters:

Name	Type	Description
`pageIndex`	number	The page number, zero-indexed, that the coordinates are on
`x`	number	The x coordinate
`y`	number	The y coordinate

Returns:

An object with the x and y XOD coordinates

Type: object

includesThumbnails()

Used to know if a document contains thumbnails.

Returns:

True if the document contains thumbnails.

Type: boolean

initOfflineDB(onComplete)

[XOD Document only] Initializes the offline database for use. Must be called before any other offline mode functions are used.

Parameters:

Name	Type	Description
`onComplete`	function	The function that's called when the offline database is ready for use.

insertBlankPages(insertBeforeThesePages, width, height)

[PDF Document only] Inserts blank pages before the given list of pages. Both width and height are in units of PDF points.

Parameters:

Name	Type	Description
`insertBeforeThesePages`	Array.<number>	array of page numbers before which to insert blanks
`width`	number	width of the blank pages to insert. By default the width is 612 PDF points.
`height`	number	height of the blank pages to insert. By default the height is 792 PDF points.

Returns:

a promise that resolves to an object with info for any pages inserted

Type: Promise.<object>

insertPages(sourceDocument, pageArray, insertBeforeThisPage)

[PDF Document only] Inserts a set of pages from the provided Document before a given page number. Note that this method will need to wait for the entire file to be downloaded before the change is applied.

Parameters:

Name	Type	Description
`sourceDocument`	Document	other document from which to take pages (cannot be the same document)
`pageArray`	Array.<number>	array of page numbers to extract from the given document
`insertBeforeThisPage`	number	page number before which to insert the pages

Returns:

a promise that resolves to an object describing the updated state of the pages in the document

Type: Promise.<object>

isDownloaded()

[XOD Document only] Whether the document has already been downloaded for offline mode or not.

isLinearized()

[PDF Document only] Returns whether the document is linearized or not. Note that this only works for documents that are loaded by URL and if useDownloader is not set to false.

Returns:

Whether the document is linearized or not

Type: boolean

isWebViewerServerDocument()

Gets whether the document will be interacted with as a WebViewer Server document This will return false if the document was loaded from WebViewer Server but forceClientSideInit is set to true

Returns:

Returns whether the document will be interacted with as a WebViewer Server document.

Type: boolean

loadAsync(partRetriever, callback, options)

Initialize a Document so that it can be used to load page canvases.

Parameters:

Name Type Description

partRetriever PartRetrievers.PartRetriever An instance of PartRetriever.

callback CoreControls.Document.LoadAsyncCallback

options

an object that can contain the following optional parameters

Properties

Name	Type	Argument	Description
`workerTransportPromise`	Promise.<any>	<optional>	Required to load a PDF or Office file. A promise that will be resolved when a worker transport has been initialized. This can be created by calling CoreControls.initPDFWorkerTransports or CoreControls.initOfficeWorkerTransports as appropriate.
`getPassword`	function	<optional>	A method of the form function(callback) where callback is of the form function(password). getPassword will be called when a password is required to load a PDF document and should call the callback with the retrieved password.
`extension`	string	<optional>	An field used to specify the type of file being read. This is only relevant for PDF viewing and at the moment only works for certain image formats and .pdf

loadCanvasAsync(options)

Loads a canvas for a particular page index.

Parameters:

Name Type Description

options

Object

An object specifying the options for loading the canvas. The following parameters should be properties on this object. The only non-optional parameter is pageIndex.

Properties

Name	Type	Argument	Description
`pageIndex`	number		The page number, zero-indexed, of the requested canvas.
`zoom`	number	<optional>	The zoom value to render the page at.
`getZoom`	function	<optional>	A function that returns the zoom value to render the page at. Use this instead of "zoom" if the value might change in the process of setting up the canvas.
`pageRotation`	CoreControls.PageRotation	<optional>	The rotation of the page. Valid values are CoreControls.PageRotation.e_0, CoreControls.PageRotation.e_90, CoreControls.PageRotation.e_180, CoreControls.PageRotation.e_270.
`getPageRotation`	function	<optional>	A function that returns the rotation of the page. Use this instead of "pageRotation" if the value might change in the process of setting up the canvas.
`finishedLoading`	function	<optional>	A callback called after the list of page resources is retrieved. Return true if rendering should continue, false otherwise.
`acquireResources`	function	<optional>	A function that returns whether resources need to be acquired or not, defaults to true.
`resourcesLoaded`	function	<optional>	A callback called after the page's resources have been loaded. Return true if rendering should continue, false otherwise.
`getPageTransform`	function	<optional>	A function that returns the x and y values of the page's translation.
`drawComplete`	function	<optional>	The callback to call when the canvas has been completely rendered. The first parameter is a canvas object, and the second parameter is the page index.
`drawProgressive`	function	<optional>	The callback to call when the canvas has been partially rendered.
`renderRect`	object	<optional>	An object with x1, y1, x2, y2 properties which is the partial rectangle to render of the entire page. The top left of the page is (0, 0).
`useProgress`	boolean	<optional>	Whether progressive rendering should be used or not.

Returns:

An id that can be passed to the corresponding Pause, Resume or Cancel functions

Type: number

loadPageText(pageIndex, onComplete)

Gets all the text on the requested page.

Parameters:

Name	Type	Description
`pageIndex`	number	The page number, zero-indexed, that the text is on.
`onComplete`	function	The callback to call when the text is ready. Accepts the page's text as the first parameter

loadThumbnailAsync(pageIndex, onLoadThumbnail)

Loads a thumbnail image for a particular page.

Parameters:

Name	Type	Description
`pageIndex`	number	The page index of the requested thumbnail (0-indexed).
`onLoadThumbnail`	function	The callback to call when the thumbnail has been retrieved. Accepts an HTMLImageElement or HTMLCanvasElement as a parameter.

Returns:

The id of the request that can later be used for cancelling the request It is passed an image element if the .xod file contains thumbnails and a canvas element otherwise.

Type: number

mergeDocument(source [, position])

[PDF Document only] Merge a file into the currently opened document

Parameters:

Name	Type	Argument	Description
`source`	string \| File \| ArrayBuffer \| Blob		Source parameter, path/url to document or File.
`position`	number	<optional>	Optional position for where to merge the document, default to end of file if nothing entered

Returns:

a promise that resolves on completion

Type: Promise.<any>

movePages(pageArray, insertBeforeThisPage)

[PDF Document only] Moves the pages given in an array so they appear in sequence before a given page number. Note that this method will need to wait for the entire file to be downloaded before the change is applied.

Parameters:

Name	Type	Description
`pageArray`	Array.<number>	the page numbers to move
`insertBeforeThisPage`	number	page number before which to insert the other pages

Returns:

a promise that resolves to an object describing the updated state of the pages in the document

Type: Promise.<object>

pauseLoadCanvas(id)

Pauses the loadCanvasAsync call corresponding to the passed in id

Parameters:

Name	Type	Description
`id`	number	The id returned from the loadCanvasAsync call that will be paused.

refreshTextData()

Refresh the text data stored by the viewer. Useful if the text content of the document has changed, e.g. after a redaction.

removePages(pageArray)

[PDF Document only] Removes the given page numbers. Note that this method will need to wait for the entire file to be downloaded before the change is applied.

Parameters:

Name	Type	Description
`pageArray`	Array.<number>	the page numbers to remove

Returns:

a promise that resolves to an object describing the updated state of the pages in the document

Type: Promise.<object>

resumeLoadCanvas(id)

Resumes the loadCanvasAsync call corresponding to the passed in id

Parameters:

Name	Type	Description
`id`	number	The id returned from the loadCanvasAsync call that will be resumed.

rotatePages(pageArray, rotation)

[PDF Document only] Adds the given rotation to the given pages. Note that this method will need to wait for the entire file to be downloaded before the change is applied.

Parameters:

Name	Type	Description
`pageArray`	Array.<number>	an array of the numbers of pages to rotate
`rotation`	CoreControls.PageRotation	the page rotation to add

Returns:

a promise that resolves to an object describing the updated state of the pages in the document

Type: Promise.<object>

setLayersArray(layerContext)

[PDF Document only] Update the array describing the layers/OCG structure in order to adjust which layers should be enabled or disabled.

Parameters:

Name	Type	Description
`layerContext`	Array.<any>

See:

getLayersArray

setOfflineModeEnabled(enabled)

[XOD Document only] Sets whether offline mode is enabled or not.

Parameters:

Name	Type	Description
`enabled`	boolean	The new value for whether offline mode is enabled or not.

setOverprintPreviewMode(mode)

[PDF Document only] Set the overprint preview mode to be used when rendering this document.

Parameters:

Name	Type	Description
`mode`		The mode to use. Possible values are CoreControls.OverprintPreviewMode.OFF, CoreControls.OverprintPreviewMode.ON and CoreControls.OverprintPreviewMode.PDFX_ON

setWatermark(options)

Sets watermark to be added to the document

Parameters:

Name	Type	Description
`options`	object	Object that contains style/content of the watermark

Example

doc.setWatermark({
  diagonal: {
    fontSize: (number),
    fontFamily: (string),
    color: (string),
    opacity: (number),
    text: (string)
  },
  header: {
    fontSize: (number),
    fontFamily: (string),
    color: (string),
    opacity: (number),
    left: (string),
    center: (string),
    right: (string)
  },
  footer: {
    fontSize: (number),
    fontFamily: (string),
    color: (string),
    opacity: (number),
    left: (string),
    center: (string),
    right: (string)
  }
  custom: (function(ctx, pageIndex, pageWidth, pageHeight))
});

To allow more customization of the header/footer, the following can be done:

doc.setWatermark({
diagonal: {
  fontSize: (number),
  fontFamily: (string),
  color: (string),
  opacity: (number),
  text: (string)
},
headerLeft: {
  fontSize: (number),
  fontFamily: (string),
  color: (string),
  opacity: (number),
  text: (string)
},
headerCenter: {
  fontSize: (number),
  fontFamily: (string),
  color: (string),
  opacity: (number),
  text: (string)
},
headerRight: {
  fontSize: (number),
  fontFamily: (string),
  color: (string),
  opacity: (number),
  text: (string)
},
footerLeft: {
  fontSize: (number),
  fontFamily: (string),
  color: (string),
  opacity: (number),
  text: (string)
},
footerCenter: {
  fontSize: (number),
  fontFamily: (string),
  color: (string),
  opacity: (number),
  text: (string)
},
footerRight: {
  fontSize: (number),
  fontFamily: (string),
  color: (string),
  opacity: (number),
  text: (string)
},
custom: (function(ctx, pageIndex, pageWidth, pageHeight))
});

storeOffline(onComplete, onProgress)

[XOD Document only] Downloads the document for offline viewing.

Parameters:

Name	Type	Description
`onComplete`	function	The function that's called when the document has finished being downloaded or the download has been cancelled
`onProgress`	function	The function that's called on each update in progress of the download. The fraction downloaded is passed as a parameter. (eg 50% downloaded passes 0.5)

unloadCanvasResources(id)

Unloads resources for the page associated with the loadCanvasAsync call corresponding to the passed in id. So if the loadCanvasAsync call had requested page 2 then page 2's resources will be cleaned up (as long as nothing else requires those resources). Note that the canvas element itself is not touched.

Parameters:

Name	Type	Description
`id`	number	The id returned from the loadCanvasAsync call that will have it's page resources unloaded

unloadResources()

Cleans up the resources associated with the document.

Type Definitions

LoadAsyncCallback( [error])

The callback to call when the Document has been initialized. If there is an error then an error object will be passed to the callback function.

Parameters:

Name	Type	Argument	Description
`error`	Object	<optional>	The error that occurs when initializing the document

PageInfo

Type:

Object

Properties:

Name	Type	Description
`width`	number	The width of the page
`height`	number	The height of the page

XFDFInfo

Type:

Object

Properties:

Name	Type	Description
`xfdfString`	string	The XFDF string
`pages`	Array.<number>	Array of page numbers that annotations were extracted from

Events

colorSeparationAdded

Triggered when a color separation is loaded and available on the document.

Parameters:

Name Type Description

colorData

object

An object with properties of the color separation

Properties

Name	Type	Description
`name`	string	The name of the color separation
`rgb`	Array.<any>	An array containing the R, G and B values for the separation