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// Copyright 2014 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
#ifndef PUBLIC_FPDF_FORMFILL_H_
#define PUBLIC_FPDF_FORMFILL_H_
// clang-format off
// NOLINTNEXTLINE(build/include_directory)
#include "fpdfview.h"
// These values are return values for a public API, so should not be changed
// other than the count when adding new values.
#define FORMTYPE_NONE 0 // Document contains no forms
#define FORMTYPE_ACRO_FORM 1 // Forms are specified using AcroForm spec
#define FORMTYPE_XFA_FULL 2 // Forms are specified using entire XFA spec
#define FORMTYPE_XFA_FOREGROUND 3 // Forms are specified using the XFAF subset
// of XFA spec
#define FORMTYPE_COUNT 4 // The number of form types
#define JSPLATFORM_ALERT_BUTTON_OK 0 // OK button
#define JSPLATFORM_ALERT_BUTTON_OKCANCEL 1 // OK & Cancel buttons
#define JSPLATFORM_ALERT_BUTTON_YESNO 2 // Yes & No buttons
#define JSPLATFORM_ALERT_BUTTON_YESNOCANCEL 3 // Yes, No & Cancel buttons
#define JSPLATFORM_ALERT_BUTTON_DEFAULT JSPLATFORM_ALERT_BUTTON_OK
#define JSPLATFORM_ALERT_ICON_ERROR 0 // Error
#define JSPLATFORM_ALERT_ICON_WARNING 1 // Warning
#define JSPLATFORM_ALERT_ICON_QUESTION 2 // Question
#define JSPLATFORM_ALERT_ICON_STATUS 3 // Status
#define JSPLATFORM_ALERT_ICON_ASTERISK 4 // Asterisk
#define JSPLATFORM_ALERT_ICON_DEFAULT JSPLATFORM_ALERT_ICON_ERROR
#define JSPLATFORM_ALERT_RETURN_OK 1 // OK
#define JSPLATFORM_ALERT_RETURN_CANCEL 2 // Cancel
#define JSPLATFORM_ALERT_RETURN_NO 3 // No
#define JSPLATFORM_ALERT_RETURN_YES 4 // Yes
#define JSPLATFORM_BEEP_ERROR 0 // Error
#define JSPLATFORM_BEEP_WARNING 1 // Warning
#define JSPLATFORM_BEEP_QUESTION 2 // Question
#define JSPLATFORM_BEEP_STATUS 3 // Status
#define JSPLATFORM_BEEP_DEFAULT 4 // Default
// Exported Functions
#ifdef __cplusplus
extern "C" {
#endif
typedef struct _IPDF_JsPlatform {
// Version number of the interface. Currently must be 2.
int version;
// Version 1.
// Method: app_alert
// Pop up a dialog to show warning or hint.
// Interface Version:
// 1
// Implementation Required:
// yes
// Parameters:
// pThis - Pointer to the interface structure itself.
// Msg - A string containing the message to be displayed.
// Title - The title of the dialog.
// Type - The type of button group, one of the
// JSPLATFORM_ALERT_BUTTON_* values above.
// nIcon - The type of the icon, one of the
// JSPLATFORM_ALERT_ICON_* above.
// Return Value:
// Option selected by user in dialogue, one of the
// JSPLATFORM_ALERT_RETURN_* values above.
int (*app_alert)(struct _IPDF_JsPlatform* pThis,
FPDF_WIDESTRING Msg,
FPDF_WIDESTRING Title,
int Type,
int Icon);
// Method: app_beep
// Causes the system to play a sound.
// Interface Version:
// 1
// Implementation Required:
// yes
// Parameters:
// pThis - Pointer to the interface structure itself
// nType - The sound type, see JSPLATFORM_BEEP_TYPE_*
// above.
// Return Value:
// None
void (*app_beep)(struct _IPDF_JsPlatform* pThis, int nType);
// Method: app_response
// Displays a dialog box containing a question and an entry field for
// the user to reply to the question.
// Interface Version:
// 1
// Implementation Required:
// yes
// Parameters:
// pThis - Pointer to the interface structure itself
// Question - The question to be posed to the user.
// Title - The title of the dialog box.
// Default - A default value for the answer to the question. If
// not specified, no default value is presented.
// cLabel - A short string to appear in front of and on the
// same line as the edit text field.
// bPassword - If true, indicates that the user's response should
// be shown as asterisks (*) or bullets (?) to mask
// the response, which might be sensitive information.
// response - A string buffer allocated by PDFium, to receive the
// user's response.
// length - The length of the buffer in bytes. Currently, it is
// always 2048.
// Return Value:
// Number of bytes the complete user input would actually require, not
// including trailing zeros, regardless of the value of the length
// parameter or the presence of the response buffer.
// Comments:
// No matter on what platform, the response buffer should be always
// written using UTF-16LE encoding. If a response buffer is
// present and the size of the user input exceeds the capacity of the
// buffer as specified by the length parameter, only the
// first "length" bytes of the user input are to be written to the
// buffer.
int (*app_response)(struct _IPDF_JsPlatform* pThis,
FPDF_WIDESTRING Question,
FPDF_WIDESTRING Title,
FPDF_WIDESTRING Default,
FPDF_WIDESTRING cLabel,
FPDF_BOOL bPassword,
void* response,
int length);
// Method: Doc_getFilePath
// Get the file path of the current document.
// Interface Version:
// 1
// Implementation Required:
// yes
// Parameters:
// pThis - Pointer to the interface structure itself
// filePath - The string buffer to receive the file path. Can
// be NULL.
// length - The length of the buffer, number of bytes. Can
// be 0.
// Return Value:
// Number of bytes the filePath consumes, including trailing zeros.
// Comments:
// The filePath should always be provided in the local encoding.
// The return value always indicated number of bytes required for
// the buffer, even when there is no buffer specified, or the buffer
// size is less than required. In this case, the buffer will not
// be modified.
int (*Doc_getFilePath)(struct _IPDF_JsPlatform* pThis,
void* filePath,
int length);
// Method: Doc_mail
// Mails the data buffer as an attachment to all recipients, with or
// without user interaction.
// Interface Version:
// 1
// Implementation Required:
// yes
// Parameters:
// pThis - Pointer to the interface structure itself
// mailData - Pointer to the data buffer to be sent. Can be NULL.
// length - The size,in bytes, of the buffer pointed by
// mailData parameter. Can be 0.
// bUI - If true, the rest of the parameters are used in a
// compose-new-message window that is displayed to the
// user. If false, the cTo parameter is required and
// all others are optional.
// To - A semicolon-delimited list of recipients for the
// message.
// Subject - The subject of the message. The length limit is
// 64 KB.
// CC - A semicolon-delimited list of CC recipients for
// the message.
// BCC - A semicolon-delimited list of BCC recipients for
// the message.
// Msg - The content of the message. The length limit is
// 64 KB.
// Return Value:
// None.
// Comments:
// If the parameter mailData is NULL or length is 0, the current
// document will be mailed as an attachment to all recipients.
void (*Doc_mail)(struct _IPDF_JsPlatform* pThis,
void* mailData,
int length,
FPDF_BOOL bUI,
FPDF_WIDESTRING To,
FPDF_WIDESTRING Subject,
FPDF_WIDESTRING CC,
FPDF_WIDESTRING BCC,
FPDF_WIDESTRING Msg);
// Method: Doc_print
// Prints all or a specific number of pages of the document.
// Interface Version:
// 1
// Implementation Required:
// yes
// Parameters:
// pThis - Pointer to the interface structure itself.
// bUI - If true, will cause a UI to be presented to the
// user to obtain printing information and confirm
// the action.
// nStart - A 0-based index that defines the start of an
// inclusive range of pages.
// nEnd - A 0-based index that defines the end of an
// inclusive page range.
// bSilent - If true, suppresses the cancel dialog box while
// the document is printing. The default is false.
// bShrinkToFit - If true, the page is shrunk (if necessary) to
// fit within the imageable area of the printed page.
// bPrintAsImage - If true, print pages as an image.
// bReverse - If true, print from nEnd to nStart.
// bAnnotations - If true (the default), annotations are
// printed.
// Return Value:
// None.
void (*Doc_print)(struct _IPDF_JsPlatform* pThis,
FPDF_BOOL bUI,
int nStart,
int nEnd,
FPDF_BOOL bSilent,
FPDF_BOOL bShrinkToFit,
FPDF_BOOL bPrintAsImage,
FPDF_BOOL bReverse,
FPDF_BOOL bAnnotations);
// Method: Doc_submitForm
// Send the form data to a specified URL.
// Interface Version:
// 1
// Implementation Required:
// yes
// Parameters:
// pThis - Pointer to the interface structure itself
// formData - Pointer to the data buffer to be sent.
// length - The size,in bytes, of the buffer pointed by
// formData parameter.
// URL - The URL to send to.
// Return Value:
// None.
void (*Doc_submitForm)(struct _IPDF_JsPlatform* pThis,
void* formData,
int length,
FPDF_WIDESTRING URL);
// Method: Doc_gotoPage
// Jump to a specified page.
// Interface Version:
// 1
// Implementation Required:
// yes
// Parameters:
// pThis - Pointer to the interface structure itself
// nPageNum - The specified page number, zero for the first page.
// Return Value:
// None.
void (*Doc_gotoPage)(struct _IPDF_JsPlatform* pThis, int nPageNum);
// Method: Field_browse
// Show a file selection dialog, and return the selected file path.
// Interface Version:
// 1
// Implementation Required:
// yes
// Parameters:
// pThis - Pointer to the interface structure itself.
// filePath - Pointer to the data buffer to receive the file
// path. Can be NULL.
// length - The length of the buffer, in bytes. Can be 0.
// Return Value:
// Number of bytes the filePath consumes, including trailing zeros.
// Comments:
// The filePath should always be provided in local encoding.
int (*Field_browse)(struct _IPDF_JsPlatform* pThis,
void* filePath,
int length);
// Pointer for embedder-specific data. Unused by PDFium, and despite
// its name, can be any data the embedder desires, though traditionally
// a FPDF_FORMFILLINFO interface.
void* m_pFormfillinfo;
// Version 2.
void* m_isolate; // Unused in v3, retain for compatibility.
unsigned int m_v8EmbedderSlot; // Unused in v3, retain for compatibility.
// Version 3.
// Version 3 moves m_Isolate and m_v8EmbedderSlot to FPDF_LIBRARY_CONFIG.
} IPDF_JSPLATFORM;
// Flags for Cursor type
#define FXCT_ARROW 0
#define FXCT_NESW 1
#define FXCT_NWSE 2
#define FXCT_VBEAM 3
#define FXCT_HBEAM 4
#define FXCT_HAND 5
// Function signature for the callback function passed to the FFI_SetTimer
// method.
// Parameters:
// idEvent - Identifier of the timer.
// Return value:
// None.
typedef void (*TimerCallback)(int idEvent);
// Declares of a struct type to the local system time.
typedef struct _FPDF_SYSTEMTIME {
unsigned short wYear; // years since 1900
unsigned short wMonth; // months since January - [0,11]
unsigned short wDayOfWeek; // days since Sunday - [0,6]
unsigned short wDay; // day of the month - [1,31]
unsigned short wHour; // hours since midnight - [0,23]
unsigned short wMinute; // minutes after the hour - [0,59]
unsigned short wSecond; // seconds after the minute - [0,59]
unsigned short wMilliseconds; // milliseconds after the second - [0,999]
} FPDF_SYSTEMTIME;
#ifdef PDF_ENABLE_XFA
// Pageview event flags
#define FXFA_PAGEVIEWEVENT_POSTADDED 1 // After a new pageview is added.
#define FXFA_PAGEVIEWEVENT_POSTREMOVED 3 // After a pageview is removed.
// Definitions for Right Context Menu Features Of XFA Fields
#define FXFA_MENU_COPY 1
#define FXFA_MENU_CUT 2
#define FXFA_MENU_SELECTALL 4
#define FXFA_MENU_UNDO 8
#define FXFA_MENU_REDO 16
#define FXFA_MENU_PASTE 32
// Definitions for File Type.
#define FXFA_SAVEAS_XML 1
#define FXFA_SAVEAS_XDP 2
#endif // PDF_ENABLE_XFA
typedef struct _FPDF_FORMFILLINFO {
// Version number of the interface.
// Version 1 contains stable interfaces. Version 2 has additional
// experimental interfaces.
// When PDFium is built without the XFA module, version can be 1 or 2.
// With version 1, only stable interfaces are called. With version 2,
// additional experimental interfaces are also called.
// When PDFium is built with the XFA module, version must be 2.
// All the XFA related interfaces are experimental. If PDFium is built with
// the XFA module and version 1 then none of the XFA related interfaces
// would be called. When PDFium is built with XFA module then the version
// must be 2.
int version;
// Version 1.
// Method: Release
// Give the implementation a chance to release any resources after the
// interface is no longer used.
// Interface Version:
// 1
// Implementation Required:
// No
// Comments:
// Called by PDFium during the final cleanup process.
// Parameters:
// pThis - Pointer to the interface structure itself
// Return Value:
// None
void (*Release)(struct _FPDF_FORMFILLINFO* pThis);
// Method: FFI_Invalidate
// Invalidate the client area within the specified rectangle.
// Interface Version:
// 1
// Implementation Required:
// yes
// Parameters:
// pThis - Pointer to the interface structure itself.
// page - Handle to the page. Returned by FPDF_LoadPage().
// left - Left position of the client area in PDF page
// coordinates.
// top - Top position of the client area in PDF page
// coordinates.
// right - Right position of the client area in PDF page
// coordinates.
// bottom - Bottom position of the client area in PDF page
// coordinates.
// Return Value:
// None.
// Comments:
// All positions are measured in PDF "user space".
// Implementation should call FPDF_RenderPageBitmap() for repainting
// the specified page area.
void (*FFI_Invalidate)(struct _FPDF_FORMFILLINFO* pThis,
FPDF_PAGE page,
double left,
double top,
double right,
double bottom);
// Method: FFI_OutputSelectedRect
// When the user selects text in form fields with the mouse, this
// callback function will be invoked with the selected areas.
// Interface Version:
// 1
// Implementation Required:
// No
// Parameters:
// pThis - Pointer to the interface structure itself.
// page - Handle to the page. Returned by FPDF_LoadPage()/
// left - Left position of the client area in PDF page
// coordinates.
// top - Top position of the client area in PDF page
// coordinates.
// right - Right position of the client area in PDF page
// coordinates.
// bottom - Bottom position of the client area in PDF page
// coordinates.
// Return Value:
// None.
// Comments:
// This callback function is useful for implementing special text
// selection effects. An implementation should first record the
// returned rectangles, then draw them one by one during the next
// painting period. Lastly, it should remove all the recorded
// rectangles when finished painting.
void (*FFI_OutputSelectedRect)(struct _FPDF_FORMFILLINFO* pThis,
FPDF_PAGE page,
double left,
double top,
double right,
double bottom);
// Method: FFI_SetCursor
// Set the Cursor shape.
// Interface Version:
// 1
// Implementation Required:
// yes
// Parameters:
// pThis - Pointer to the interface structure itself.
// nCursorType - Cursor type, see Flags for Cursor type for details.
// Return value:
// None.
void (*FFI_SetCursor)(struct _FPDF_FORMFILLINFO* pThis, int nCursorType);
// Method: FFI_SetTimer
// This method installs a system timer. An interval value is specified,
// and every time that interval elapses, the system must call into the
// callback function with the timer ID as returned by this function.
// Interface Version:
// 1
// Implementation Required:
// yes
// Parameters:
// pThis - Pointer to the interface structure itself.
// uElapse - Specifies the time-out value, in milliseconds.
// lpTimerFunc - A pointer to the callback function-TimerCallback.
// Return value:
// The timer identifier of the new timer if the function is successful.
// An application passes this value to the FFI_KillTimer method to kill
// the timer. Nonzero if it is successful; otherwise, it is zero.
int (*FFI_SetTimer)(struct _FPDF_FORMFILLINFO* pThis,
int uElapse,
TimerCallback lpTimerFunc);
// Method: FFI_KillTimer
// This method uninstalls a system timer, as set by an earlier call to
// FFI_SetTimer.
// Interface Version:
// 1
// Implementation Required:
// yes
// Parameters:
// pThis - Pointer to the interface structure itself.
// nTimerID - The timer ID returned by FFI_SetTimer function.
// Return value:
// None.
void (*FFI_KillTimer)(struct _FPDF_FORMFILLINFO* pThis, int nTimerID);
// Method: FFI_GetLocalTime
// This method receives the current local time on the system.
// Interface Version:
// 1
// Implementation Required:
// yes
// Parameters:
// pThis - Pointer to the interface structure itself.
// Return value:
// The local time. See FPDF_SYSTEMTIME above for details.
// Note: Unused.
FPDF_SYSTEMTIME (*FFI_GetLocalTime)(struct _FPDF_FORMFILLINFO* pThis);
// Method: FFI_OnChange
// This method will be invoked to notify the implementation when the
// value of any FormField on the document had been changed.
// Interface Version:
// 1
// Implementation Required:
// no
// Parameters:
// pThis - Pointer to the interface structure itself.
// Return value:
// None.
void (*FFI_OnChange)(struct _FPDF_FORMFILLINFO* pThis);
// Method: FFI_GetPage
// This method receives the page handle associated with a specified
// page index.
// Interface Version:
// 1
// Implementation Required:
// yes
// Parameters:
// pThis - Pointer to the interface structure itself.
// document - Handle to document. Returned by FPDF_LoadDocument().
// nPageIndex - Index number of the page. 0 for the first page.
// Return value:
// Handle to the page, as previously returned to the implementation by
// FPDF_LoadPage().
// Comments:
// The implementation is expected to keep track of the page handles it
// receives from PDFium, and their mappings to page numbers. In some
// cases, the document-level JavaScript action may refer to a page
// which hadn't been loaded yet. To successfully run the Javascript
// action, the implementation needs to load the page.
FPDF_PAGE (*FFI_GetPage)(struct _FPDF_FORMFILLINFO* pThis,
FPDF_DOCUMENT document,
int nPageIndex);
// Method: FFI_GetCurrentPage
// This method receives the handle to the current page.
// Interface Version:
// 1
// Implementation Required:
// Yes when V8 support is present, otherwise unused.
// Parameters:
// pThis - Pointer to the interface structure itself.
// document - Handle to document. Returned by FPDF_LoadDocument().
// Return value:
// Handle to the page. Returned by FPDF_LoadPage().
// Comments:
// PDFium doesn't keep keep track of the "current page" (e.g. the one
// that is most visible on screen), so it must ask the embedder for
// this information.
FPDF_PAGE (*FFI_GetCurrentPage)(struct _FPDF_FORMFILLINFO* pThis,
FPDF_DOCUMENT document);
// Method: FFI_GetRotation
// This method receives currently rotation of the page view.
// Interface Version:
// 1
// Implementation Required:
// yes
// Parameters:
// pThis - Pointer to the interface structure itself.
// page - Handle to page, as returned by FPDF_LoadPage().
// Return value:
// A number to indicate the page rotation in 90 degree increments
// in a clockwise direction:
// 0 - 0 degrees
// 1 - 90 degrees
// 2 - 180 degrees
// 3 - 270 degrees
// Note: Unused.
int (*FFI_GetRotation)(struct _FPDF_FORMFILLINFO* pThis, FPDF_PAGE page);
// Method: FFI_ExecuteNamedAction
// This method will execute a named action.
// Interface Version:
// 1
// Implementation Required:
// yes
// Parameters:
// pThis - Pointer to the interface structure itself.
// namedAction - A byte string which indicates the named action,
// terminated by 0.
// Return value:
// None.
// Comments:
// See ISO 32000-1:2008, section 12.6.4.11 for descriptions of the
// standard named actions, but note that a document may supply any
// name of its choosing.
void (*FFI_ExecuteNamedAction)(struct _FPDF_FORMFILLINFO* pThis,
FPDF_BYTESTRING namedAction);
// Method: FFI_SetTextFieldFocus
// Called when a text field is getting or losing focus.
// Interface Version:
// 1
// Implementation Required:
// no
// Parameters:
// pThis - Pointer to the interface structure itself.
// value - The string value of the form field, in UTF-16LE
// format.
// valueLen - The length of the string value. This is the
// number of characters, not bytes.
// is_focus - True if the form field is getting focus, false
// if the form field is losing focus.
// Return value:
// None.
// Comments:
// Only supports text fields and combobox fields.
void (*FFI_SetTextFieldFocus)(struct _FPDF_FORMFILLINFO* pThis,
FPDF_WIDESTRING value,
FPDF_DWORD valueLen,
FPDF_BOOL is_focus);
// Method: FFI_DoURIAction
// Ask the implementation to navigate to a uniform resource identifier.
// Interface Version:
// 1
// Implementation Required:
// No
// Parameters:
// pThis - Pointer to the interface structure itself.
// bsURI - A byte string which indicates the uniform
// resource identifier, terminated by 0.
// Return value:
// None.
// Comments:
// If the embedder is version 2 or higher and have implementation for
// FFI_DoURIActionWithKeyboardModifier, then
// FFI_DoURIActionWithKeyboardModifier takes precedence over
// FFI_DoURIAction.
// See the URI actions description of <<PDF Reference, version 1.7>>
// for more details.
void (*FFI_DoURIAction)(struct _FPDF_FORMFILLINFO* pThis,
FPDF_BYTESTRING bsURI);
// Method: FFI_DoGoToAction
// This action changes the view to a specified destination.
// Interface Version:
// 1
// Implementation Required:
// No
// Parameters:
// pThis - Pointer to the interface structure itself.
// nPageIndex - The index of the PDF page.
// zoomMode - The zoom mode for viewing page. See below.
// fPosArray - The float array which carries the position info.
// sizeofArray - The size of float array.
// PDFZoom values:
// - XYZ = 1
// - FITPAGE = 2
// - FITHORZ = 3
// - FITVERT = 4
// - FITRECT = 5
// - FITBBOX = 6
// - FITBHORZ = 7
// - FITBVERT = 8
// Return value:
// None.
// Comments:
// See the Destinations description of <<PDF Reference, version 1.7>>
// in 8.2.1 for more details.
void (*FFI_DoGoToAction)(struct _FPDF_FORMFILLINFO* pThis,
int nPageIndex,
int zoomMode,
float* fPosArray,
int sizeofArray);
// Pointer to IPDF_JSPLATFORM interface.
// Unused if PDFium is built without V8 support. Otherwise, if NULL, then
// JavaScript will be prevented from executing while rendering the document.
IPDF_JSPLATFORM* m_pJsPlatform;
// Version 2 - Experimental.
// Whether the XFA module is disabled when built with the XFA module.
// Interface Version:
// Ignored if |version| < 2.
FPDF_BOOL xfa_disabled;
// Method: FFI_DisplayCaret
// This method will show the caret at specified position.
// Interface Version:
// Ignored if |version| < 2.
// Implementation Required:
// Required for XFA, otherwise set to NULL.
// Parameters:
// pThis - Pointer to the interface structure itself.
// page - Handle to page. Returned by FPDF_LoadPage().
// left - Left position of the client area in PDF page
// coordinates.
// top - Top position of the client area in PDF page
// coordinates.
// right - Right position of the client area in PDF page
// coordinates.
// bottom - Bottom position of the client area in PDF page
// coordinates.
// Return value:
// None.
void (*FFI_DisplayCaret)(struct _FPDF_FORMFILLINFO* pThis,
FPDF_PAGE page,
FPDF_BOOL bVisible,
double left,
double top,
double right,
double bottom);
// Method: FFI_GetCurrentPageIndex
// This method will get the current page index.
// Interface Version:
// Ignored if |version| < 2.
// Implementation Required:
// Required for XFA, otherwise set to NULL.
// Parameters:
// pThis - Pointer to the interface structure itself.
// document - Handle to document from FPDF_LoadDocument().
// Return value:
// The index of current page.
int (*FFI_GetCurrentPageIndex)(struct _FPDF_FORMFILLINFO* pThis,
FPDF_DOCUMENT document);
// Method: FFI_SetCurrentPage
// This method will set the current page.
// Interface Version:
// Ignored if |version| < 2.
// Implementation Required:
// Required for XFA, otherwise set to NULL.
// Parameters:
// pThis - Pointer to the interface structure itself.
// document - Handle to document from FPDF_LoadDocument().
// iCurPage - The index of the PDF page.
// Return value:
// None.
void (*FFI_SetCurrentPage)(struct _FPDF_FORMFILLINFO* pThis,
FPDF_DOCUMENT document,
int iCurPage);
// Method: FFI_GotoURL
// This method will navigate to the specified URL.
// Interface Version:
// Ignored if |version| < 2.
// Implementation Required:
// Required for XFA, otherwise set to NULL.
// Parameters:
// pThis - Pointer to the interface structure itself.
// document - Handle to document from FPDF_LoadDocument().
// wsURL - The string value of the URL, in UTF-16LE format.
// Return value:
// None.
void (*FFI_GotoURL)(struct _FPDF_FORMFILLINFO* pThis,
FPDF_DOCUMENT document,
FPDF_WIDESTRING wsURL);
// Method: FFI_GetPageViewRect
// This method will get the current page view rectangle.
// Interface Version:
// Ignored if |version| < 2.
// Implementation Required:
// Required for XFA, otherwise set to NULL.
// Parameters:
// pThis - Pointer to the interface structure itself.
// page - Handle to page. Returned by FPDF_LoadPage().
// left - The pointer to receive left position of the page
// view area in PDF page coordinates.
// top - The pointer to receive top position of the page
// view area in PDF page coordinates.
// right - The pointer to receive right position of the
// page view area in PDF page coordinates.
// bottom - The pointer to receive bottom position of the
// page view area in PDF page coordinates.
// Return value:
// None.
void (*FFI_GetPageViewRect)(struct _FPDF_FORMFILLINFO* pThis,
FPDF_PAGE page,
double* left,
double* top,
double* right,
double* bottom);
// Method: FFI_PageEvent
// This method fires when pages have been added to or deleted from
// the XFA document.
// Interface Version:
// Ignored if |version| < 2.
// Implementation Required:
// Required for XFA, otherwise set to NULL.
// Parameters:
// pThis - Pointer to the interface structure itself.
// page_count - The number of pages to be added or deleted.
// event_type - See FXFA_PAGEVIEWEVENT_* above.
// Return value:
// None.
// Comments:
// The pages to be added or deleted always start from the last page
// of document. This means that if parameter page_count is 2 and
// event type is FXFA_PAGEVIEWEVENT_POSTADDED, 2 new pages have been
// appended to the tail of document; If page_count is 2 and
// event type is FXFA_PAGEVIEWEVENT_POSTREMOVED, the last 2 pages
// have been deleted.
void (*FFI_PageEvent)(struct _FPDF_FORMFILLINFO* pThis,
int page_count,
FPDF_DWORD event_type);
// Method: FFI_PopupMenu
// This method will track the right context menu for XFA fields.
// Interface Version:
// Ignored if |version| < 2.
// Implementation Required:
// Required for XFA, otherwise set to NULL.
// Parameters:
// pThis - Pointer to the interface structure itself.
// page - Handle to page. Returned by FPDF_LoadPage().
// hWidget - Always null, exists for compatibility.
// menuFlag - The menu flags. Please refer to macro definition
// of FXFA_MENU_XXX and this can be one or a
// combination of these macros.
// x - X position of the client area in PDF page
// coordinates.
// y - Y position of the client area in PDF page
// coordinates.
// Return value:
// TRUE indicates success; otherwise false.
FPDF_BOOL (*FFI_PopupMenu)(struct _FPDF_FORMFILLINFO* pThis,
FPDF_PAGE page,
FPDF_WIDGET hWidget,
int menuFlag,
float x,
float y);
// Method: FFI_OpenFile
// This method will open the specified file with the specified mode.
// Interface Version:
// Ignored if |version| < 2.
// Implementation Required:
// Required for XFA, otherwise set to NULL.
// Parameters:
// pThis - Pointer to the interface structure itself.
// fileFlag - The file flag. Please refer to macro definition
// of FXFA_SAVEAS_XXX and use one of these macros.
// wsURL - The string value of the file URL, in UTF-16LE
// format.
// mode - The mode for open file, e.g. "rb" or "wb".
// Return value:
// The handle to FPDF_FILEHANDLER.
FPDF_FILEHANDLER* (*FFI_OpenFile)(struct _FPDF_FORMFILLINFO* pThis,
int fileFlag,
FPDF_WIDESTRING wsURL,
const char* mode);
// Method: FFI_EmailTo
// This method will email the specified file stream to the specified
// contact.
// Interface Version:
// Ignored if |version| < 2.
// Implementation Required:
// Required for XFA, otherwise set to NULL.
// Parameters:
// pThis - Pointer to the interface structure itself.
// pFileHandler - Handle to the FPDF_FILEHANDLER.
// pTo - A semicolon-delimited list of recipients for the
// message,in UTF-16LE format.
// pSubject - The subject of the message,in UTF-16LE format.
// pCC - A semicolon-delimited list of CC recipients for
// the message,in UTF-16LE format.
// pBcc - A semicolon-delimited list of BCC recipients for
// the message,in UTF-16LE format.
// pMsg - Pointer to the data buffer to be sent.Can be
// NULL,in UTF-16LE format.
// Return value:
// None.
void (*FFI_EmailTo)(struct _FPDF_FORMFILLINFO* pThis,
FPDF_FILEHANDLER* fileHandler,
FPDF_WIDESTRING pTo,
FPDF_WIDESTRING pSubject,
FPDF_WIDESTRING pCC,
FPDF_WIDESTRING pBcc,
FPDF_WIDESTRING pMsg);
// Method: FFI_UploadTo
// This method will upload the specified file stream to the
// specified URL.
// Interface Version:
// Ignored if |version| < 2.
// Implementation Required:
// Required for XFA, otherwise set to NULL.
// Parameters:
// pThis - Pointer to the interface structure itself.
// pFileHandler - Handle to the FPDF_FILEHANDLER.
// fileFlag - The file flag. Please refer to macro definition
// of FXFA_SAVEAS_XXX and use one of these macros.
// uploadTo - Pointer to the URL path, in UTF-16LE format.
// Return value:
// None.
void (*FFI_UploadTo)(struct _FPDF_FORMFILLINFO* pThis,
FPDF_FILEHANDLER* fileHandler,
int fileFlag,
FPDF_WIDESTRING uploadTo);
// Method: FFI_GetPlatform
// This method will get the current platform.
// Interface Version:
// Ignored if |version| < 2.
// Implementation Required:
// Required for XFA, otherwise set to NULL.
// Parameters:
// pThis - Pointer to the interface structure itself.
// platform - Pointer to the data buffer to receive the
// platform,in UTF-16LE format. Can be NULL.
// length - The length of the buffer in bytes. Can be
// 0 to query the required size.
// Return value:
// The length of the buffer, number of bytes.
int (*FFI_GetPlatform)(struct _FPDF_FORMFILLINFO* pThis,
void* platform,
int length);
// Method: FFI_GetLanguage
// This method will get the current language.
// Interface Version:
// Ignored if |version| < 2.
// Implementation Required:
// Required for XFA, otherwise set to NULL.
// Parameters:
// pThis - Pointer to the interface structure itself.
// language - Pointer to the data buffer to receive the
// current language. Can be NULL.
// length - The length of the buffer in bytes. Can be
// 0 to query the required size.
// Return value:
// The length of the buffer, number of bytes.
int (*FFI_GetLanguage)(struct _FPDF_FORMFILLINFO* pThis,
void* language,
int length);
// Method: FFI_DownloadFromURL
// This method will download the specified file from the URL.
// Interface Version:
// Ignored if |version| < 2.
// Implementation Required:
// Required for XFA, otherwise set to NULL.
// Parameters:
// pThis - Pointer to the interface structure itself.
// URL - The string value of the file URL, in UTF-16LE
// format.
// Return value:
// The handle to FPDF_FILEHANDLER.
FPDF_FILEHANDLER* (*FFI_DownloadFromURL)(struct _FPDF_FORMFILLINFO* pThis,
FPDF_WIDESTRING URL);
// Method: FFI_PostRequestURL
// This method will post the request to the server URL.
// Interface Version:
// Ignored if |version| < 2.
// Implementation Required:
// Required for XFA, otherwise set to NULL.
// Parameters:
// pThis - Pointer to the interface structure itself.
// wsURL - The string value of the server URL, in UTF-16LE
// format.
// wsData - The post data,in UTF-16LE format.
// wsContentType - The content type of the request data, in
// UTF-16LE format.
// wsEncode - The encode type, in UTF-16LE format.
// wsHeader - The request header,in UTF-16LE format.
// response - Pointer to the FPDF_BSTR to receive the response
// data from the server, in UTF-16LE format.
// Return value:
// TRUE indicates success, otherwise FALSE.
FPDF_BOOL (*FFI_PostRequestURL)(struct _FPDF_FORMFILLINFO* pThis,
FPDF_WIDESTRING wsURL,
FPDF_WIDESTRING wsData,
FPDF_WIDESTRING wsContentType,
FPDF_WIDESTRING wsEncode,
FPDF_WIDESTRING wsHeader,
FPDF_BSTR* response);
// Method: FFI_PutRequestURL
// This method will put the request to the server URL.
// Interface Version:
// Ignored if |version| < 2.
// Implementation Required:
// Required for XFA, otherwise set to NULL.
// Parameters:
// pThis - Pointer to the interface structure itself.
// wsURL - The string value of the server URL, in UTF-16LE
// format.
// wsData - The put data, in UTF-16LE format.
// wsEncode - The encode type, in UTR-16LE format.
// Return value:
// TRUE indicates success, otherwise FALSE.
FPDF_BOOL (*FFI_PutRequestURL)(struct _FPDF_FORMFILLINFO* pThis,
FPDF_WIDESTRING wsURL,
FPDF_WIDESTRING wsData,
FPDF_WIDESTRING wsEncode);
// Method: FFI_OnFocusChange
// Called when the focused annotation is updated.
// Interface Version:
// Ignored if |version| < 2.
// Implementation Required:
// No
// Parameters:
// param - Pointer to the interface structure itself.
// annot - The focused annotation.
// page_index - Index number of the page which contains the
// focused annotation. 0 for the first page.
// Return value:
// None.
// Comments:
// This callback function is useful for implementing any view based
// action such as scrolling the annotation rect into view. The
// embedder should not copy and store the annot as its scope is
// limited to this call only.
void (*FFI_OnFocusChange)(struct _FPDF_FORMFILLINFO* param,
FPDF_ANNOTATION annot,
int page_index);
// Method: FFI_DoURIActionWithKeyboardModifier
// Ask the implementation to navigate to a uniform resource identifier
// with the specified modifiers.
// Interface Version:
// Ignored if |version| < 2.
// Implementation Required:
// No
// Parameters:
// param - Pointer to the interface structure itself.
// uri - A byte string which indicates the uniform
// resource identifier, terminated by 0.
// modifiers - Keyboard modifier that indicates which of
// the virtual keys are down, if any.
// Return value:
// None.
// Comments:
// If the embedder who is version 2 and does not implement this API,
// then a call will be redirected to FFI_DoURIAction.
// See the URI actions description of <<PDF Reference, version 1.7>>
// for more details.
void(*FFI_DoURIActionWithKeyboardModifier)(struct _FPDF_FORMFILLINFO* param,
FPDF_BYTESTRING uri,
int modifiers);
} FPDF_FORMFILLINFO;
// Function: FPDFDOC_InitFormFillEnvironment
// Initialize form fill environment.
// Parameters:
// document - Handle to document from FPDF_LoadDocument().
// formInfo - Pointer to a FPDF_FORMFILLINFO structure.
// Return Value:
// Handle to the form fill module, or NULL on failure.
// Comments:
// This function should be called before any form fill operation.
// The FPDF_FORMFILLINFO passed in via |formInfo| must remain valid until
// the returned FPDF_FORMHANDLE is closed.
FPDF_EXPORT FPDF_FORMHANDLE FPDF_CALLCONV
FPDFDOC_InitFormFillEnvironment(FPDF_DOCUMENT document,
FPDF_FORMFILLINFO* formInfo);
// Function: FPDFDOC_ExitFormFillEnvironment
// Take ownership of |hHandle| and exit form fill environment.
// Parameters:
// hHandle - Handle to the form fill module, as returned by
// FPDFDOC_InitFormFillEnvironment().
// Return Value:
// None.
// Comments:
// This function is a no-op when |hHandle| is null.
FPDF_EXPORT void FPDF_CALLCONV
FPDFDOC_ExitFormFillEnvironment(FPDF_FORMHANDLE hHandle);
// Function: FORM_OnAfterLoadPage
// This method is required for implementing all the form related
// functions. Should be invoked after user successfully loaded a
// PDF page, and FPDFDOC_InitFormFillEnvironment() has been invoked.
// Parameters:
// hHandle - Handle to the form fill module, as returned by
// FPDFDOC_InitFormFillEnvironment().
// Return Value:
// None.
FPDF_EXPORT void FPDF_CALLCONV FORM_OnAfterLoadPage(FPDF_PAGE page,
FPDF_FORMHANDLE hHandle);
// Function: FORM_OnBeforeClosePage
// This method is required for implementing all the form related
// functions. Should be invoked before user closes the PDF page.
// Parameters:
// page - Handle to the page, as returned by FPDF_LoadPage().
// hHandle - Handle to the form fill module, as returned by
// FPDFDOC_InitFormFillEnvironment().
// Return Value:
// None.
FPDF_EXPORT void FPDF_CALLCONV FORM_OnBeforeClosePage(FPDF_PAGE page,
FPDF_FORMHANDLE hHandle);
// Function: FORM_DoDocumentJSAction
// This method is required for performing document-level JavaScript
// actions. It should be invoked after the PDF document has been loaded.
// Parameters:
// hHandle - Handle to the form fill module, as returned by
// FPDFDOC_InitFormFillEnvironment().
// Return Value:
// None.
// Comments:
// If there is document-level JavaScript action embedded in the
// document, this method will execute the JavaScript action. Otherwise,
// the method will do nothing.
FPDF_EXPORT void FPDF_CALLCONV
FORM_DoDocumentJSAction(FPDF_FORMHANDLE hHandle);
// Function: FORM_DoDocumentOpenAction
// This method is required for performing open-action when the document
// is opened.
// Parameters:
// hHandle - Handle to the form fill module, as returned by
// FPDFDOC_InitFormFillEnvironment().
// Return Value:
// None.
// Comments:
// This method will do nothing if there are no open-actions embedded
// in the document.
FPDF_EXPORT void FPDF_CALLCONV
FORM_DoDocumentOpenAction(FPDF_FORMHANDLE hHandle);
// Additional actions type of document:
// WC, before closing document, JavaScript action.
// WS, before saving document, JavaScript action.
// DS, after saving document, JavaScript action.
// WP, before printing document, JavaScript action.
// DP, after printing document, JavaScript action.
#define FPDFDOC_AACTION_WC 0x10
#define FPDFDOC_AACTION_WS 0x11
#define FPDFDOC_AACTION_DS 0x12
#define FPDFDOC_AACTION_WP 0x13
#define FPDFDOC_AACTION_DP 0x14
// Function: FORM_DoDocumentAAction
// This method is required for performing the document's
// additional-action.
// Parameters:
// hHandle - Handle to the form fill module. Returned by
// FPDFDOC_InitFormFillEnvironment.
// aaType - The type of the additional-actions which defined
// above.
// Return Value:
// None.
// Comments:
// This method will do nothing if there is no document
// additional-action corresponding to the specified |aaType|.
FPDF_EXPORT void FPDF_CALLCONV FORM_DoDocumentAAction(FPDF_FORMHANDLE hHandle,
int aaType);
// Additional-action types of page object:
// OPEN (/O) -- An action to be performed when the page is opened
// CLOSE (/C) -- An action to be performed when the page is closed
#define FPDFPAGE_AACTION_OPEN 0
#define FPDFPAGE_AACTION_CLOSE 1
// Function: FORM_DoPageAAction
// This method is required for performing the page object's
// additional-action when opened or closed.
// Parameters:
// page - Handle to the page, as returned by FPDF_LoadPage().
// hHandle - Handle to the form fill module, as returned by
// FPDFDOC_InitFormFillEnvironment().
// aaType - The type of the page object's additional-actions
// which defined above.
// Return Value:
// None.
// Comments:
// This method will do nothing if no additional-action corresponding
// to the specified |aaType| exists.
FPDF_EXPORT void FPDF_CALLCONV FORM_DoPageAAction(FPDF_PAGE page,
FPDF_FORMHANDLE hHandle,
int aaType);
// Function: FORM_OnMouseMove
// Call this member function when the mouse cursor moves.
// Parameters:
// hHandle - Handle to the form fill module, as returned by
// FPDFDOC_InitFormFillEnvironment().
// page - Handle to the page, as returned by FPDF_LoadPage().
// modifier - Indicates whether various virtual keys are down.
// page_x - Specifies the x-coordinate of the cursor in PDF user
// space.
// page_y - Specifies the y-coordinate of the cursor in PDF user
// space.
// Return Value:
// True indicates success; otherwise false.
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FORM_OnMouseMove(FPDF_FORMHANDLE hHandle,
FPDF_PAGE page,
int modifier,
double page_x,
double page_y);
// Experimental API
// Function: FORM_OnMouseWheel
// Call this member function when the user scrolls the mouse wheel.
// Parameters:
// hHandle - Handle to the form fill module, as returned by
// FPDFDOC_InitFormFillEnvironment().
// page - Handle to the page, as returned by FPDF_LoadPage().
// modifier - Indicates whether various virtual keys are down.
// page_coord - Specifies the coordinates of the cursor in PDF user
// space.
// delta_x - Specifies the amount of wheel movement on the x-axis,
// in units of platform-agnostic wheel deltas. Negative
// values mean left.
// delta_y - Specifies the amount of wheel movement on the y-axis,
// in units of platform-agnostic wheel deltas. Negative
// values mean down.
// Return Value:
// True indicates success; otherwise false.
// Comments:
// For |delta_x| and |delta_y|, the caller must normalize
// platform-specific wheel deltas. e.g. On Windows, a delta value of 240
// for a WM_MOUSEWHEEL event normalizes to 2, since Windows defines
// WHEEL_DELTA as 120.
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FORM_OnMouseWheel(
FPDF_FORMHANDLE hHandle,
FPDF_PAGE page,
int modifier,
const FS_POINTF* page_coord,
int delta_x,
int delta_y);
// Function: FORM_OnFocus
// This function focuses the form annotation at a given point. If the
// annotation at the point already has focus, nothing happens. If there
// is no annotation at the point, removes form focus.
// Parameters:
// hHandle - Handle to the form fill module, as returned by
// FPDFDOC_InitFormFillEnvironment().
// page - Handle to the page, as returned by FPDF_LoadPage().
// modifier - Indicates whether various virtual keys are down.
// page_x - Specifies the x-coordinate of the cursor in PDF user
// space.
// page_y - Specifies the y-coordinate of the cursor in PDF user
// space.
// Return Value:
// True if there is an annotation at the given point and it has focus.
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FORM_OnFocus(FPDF_FORMHANDLE hHandle,
FPDF_PAGE page,
int modifier,
double page_x,
double page_y);
// Function: FORM_OnLButtonDown
// Call this member function when the user presses the left
// mouse button.
// Parameters:
// hHandle - Handle to the form fill module, as returned by
// FPDFDOC_InitFormFillEnvironment().
// page - Handle to the page, as returned by FPDF_LoadPage().
// modifier - Indicates whether various virtual keys are down.
// page_x - Specifies the x-coordinate of the cursor in PDF user
// space.
// page_y - Specifies the y-coordinate of the cursor in PDF user
// space.
// Return Value:
// True indicates success; otherwise false.
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FORM_OnLButtonDown(FPDF_FORMHANDLE hHandle,
FPDF_PAGE page,
int modifier,
double page_x,
double page_y);
// Function: FORM_OnRButtonDown
// Same as above, execpt for the right mouse button.
// Comments:
// At the present time, has no effect except in XFA builds, but is
// included for the sake of symmetry.
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FORM_OnRButtonDown(FPDF_FORMHANDLE hHandle,
FPDF_PAGE page,
int modifier,
double page_x,
double page_y);
// Function: FORM_OnLButtonUp
// Call this member function when the user releases the left
// mouse button.
// Parameters:
// hHandle - Handle to the form fill module, as returned by
// FPDFDOC_InitFormFillEnvironment().
// page - Handle to the page, as returned by FPDF_LoadPage().
// modifier - Indicates whether various virtual keys are down.
// page_x - Specifies the x-coordinate of the cursor in device.
// page_y - Specifies the y-coordinate of the cursor in device.
// Return Value:
// True indicates success; otherwise false.
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FORM_OnLButtonUp(FPDF_FORMHANDLE hHandle,
FPDF_PAGE page,
int modifier,
double page_x,
double page_y);
// Function: FORM_OnRButtonUp
// Same as above, execpt for the right mouse button.
// Comments:
// At the present time, has no effect except in XFA builds, but is
// included for the sake of symmetry.
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FORM_OnRButtonUp(FPDF_FORMHANDLE hHandle,
FPDF_PAGE page,
int modifier,
double page_x,
double page_y);
// Function: FORM_OnLButtonDoubleClick
// Call this member function when the user double clicks the
// left mouse button.
// Parameters:
// hHandle - Handle to the form fill module, as returned by
// FPDFDOC_InitFormFillEnvironment().
// page - Handle to the page, as returned by FPDF_LoadPage().
// modifier - Indicates whether various virtual keys are down.
// page_x - Specifies the x-coordinate of the cursor in PDF user
// space.
// page_y - Specifies the y-coordinate of the cursor in PDF user
// space.
// Return Value:
// True indicates success; otherwise false.
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FORM_OnLButtonDoubleClick(FPDF_FORMHANDLE hHandle,
FPDF_PAGE page,
int modifier,
double page_x,
double page_y);
// Function: FORM_OnKeyDown
// Call this member function when a nonsystem key is pressed.
// Parameters:
// hHandle - Handle to the form fill module, aseturned by
// FPDFDOC_InitFormFillEnvironment().
// page - Handle to the page, as returned by FPDF_LoadPage().
// nKeyCode - The virtual-key code of the given key (see
// fpdf_fwlevent.h for virtual key codes).
// modifier - Mask of key flags (see fpdf_fwlevent.h for key
// flag values).
// Return Value:
// True indicates success; otherwise false.
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FORM_OnKeyDown(FPDF_FORMHANDLE hHandle,
FPDF_PAGE page,
int nKeyCode,
int modifier);
// Function: FORM_OnKeyUp
// Call this member function when a nonsystem key is released.
// Parameters:
// hHandle - Handle to the form fill module, as returned by
// FPDFDOC_InitFormFillEnvironment().
// page - Handle to the page, as returned by FPDF_LoadPage().
// nKeyCode - The virtual-key code of the given key (see
// fpdf_fwlevent.h for virtual key codes).
// modifier - Mask of key flags (see fpdf_fwlevent.h for key
// flag values).
// Return Value:
// True indicates success; otherwise false.
// Comments:
// Currently unimplemented and always returns false. PDFium reserves this
// API and may implement it in the future on an as-needed basis.
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FORM_OnKeyUp(FPDF_FORMHANDLE hHandle,
FPDF_PAGE page,
int nKeyCode,
int modifier);
// Function: FORM_OnChar
// Call this member function when a keystroke translates to a
// nonsystem character.
// Parameters:
// hHandle - Handle to the form fill module, as returned by
// FPDFDOC_InitFormFillEnvironment().
// page - Handle to the page, as returned by FPDF_LoadPage().
// nChar - The character code value itself.
// modifier - Mask of key flags (see fpdf_fwlevent.h for key
// flag values).
// Return Value:
// True indicates success; otherwise false.
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FORM_OnChar(FPDF_FORMHANDLE hHandle,
FPDF_PAGE page,
int nChar,
int modifier);
// Experimental API
// Function: FORM_GetFocusedText
// Call this function to obtain the text within the current focused
// field, if any.
// Parameters:
// hHandle - Handle to the form fill module, as returned by
// FPDFDOC_InitFormFillEnvironment().
// page - Handle to the page, as returned by FPDF_LoadPage().
// buffer - Buffer for holding the form text, encoded in
// UTF-16LE. If NULL, |buffer| is not modified.
// buflen - Length of |buffer| in bytes. If |buflen| is less
// than the length of the form text string, |buffer| is
// not modified.
// Return Value:
// Length in bytes for the text in the focused field.
FPDF_EXPORT unsigned long FPDF_CALLCONV
FORM_GetFocusedText(FPDF_FORMHANDLE hHandle,
FPDF_PAGE page,
void* buffer,
unsigned long buflen);
// Function: FORM_GetSelectedText
// Call this function to obtain selected text within a form text
// field or form combobox text field.
// Parameters:
// hHandle - Handle to the form fill module, as returned by
// FPDFDOC_InitFormFillEnvironment().
// page - Handle to the page, as returned by FPDF_LoadPage().
// buffer - Buffer for holding the selected text, encoded in
// UTF-16LE. If NULL, |buffer| is not modified.
// buflen - Length of |buffer| in bytes. If |buflen| is less
// than the length of the selected text string,
// |buffer| is not modified.
// Return Value:
// Length in bytes of selected text in form text field or form combobox
// text field.
FPDF_EXPORT unsigned long FPDF_CALLCONV
FORM_GetSelectedText(FPDF_FORMHANDLE hHandle,
FPDF_PAGE page,
void* buffer,
unsigned long buflen);
// Experimental API
// Function: FORM_ReplaceAndKeepSelection
// Call this function to replace the selected text in a form
// text field or user-editable form combobox text field with another
// text string (which can be empty or non-empty). If there is no
// selected text, this function will append the replacement text after
// the current caret position. After the insertion, the inserted text
// will be selected.
// Parameters:
// hHandle - Handle to the form fill module, as returned by
// FPDFDOC_InitFormFillEnvironment().
// page - Handle to the page, as Returned by FPDF_LoadPage().
// wsText - The text to be inserted, in UTF-16LE format.
// Return Value:
// None.
FPDF_EXPORT void FPDF_CALLCONV
FORM_ReplaceAndKeepSelection(FPDF_FORMHANDLE hHandle,
FPDF_PAGE page,
FPDF_WIDESTRING wsText);
// Function: FORM_ReplaceSelection
// Call this function to replace the selected text in a form
// text field or user-editable form combobox text field with another
// text string (which can be empty or non-empty). If there is no
// selected text, this function will append the replacement text after
// the current caret position. After the insertion, the selection range
// will be set to empty.
// Parameters:
// hHandle - Handle to the form fill module, as returned by
// FPDFDOC_InitFormFillEnvironment().
// page - Handle to the page, as Returned by FPDF_LoadPage().
// wsText - The text to be inserted, in UTF-16LE format.
// Return Value:
// None.
FPDF_EXPORT void FPDF_CALLCONV FORM_ReplaceSelection(FPDF_FORMHANDLE hHandle,
FPDF_PAGE page,
FPDF_WIDESTRING wsText);
// Experimental API
// Function: FORM_SelectAllText
// Call this function to select all the text within the currently focused
// form text field or form combobox text field.
// Parameters:
// hHandle - Handle to the form fill module, as returned by
// FPDFDOC_InitFormFillEnvironment().
// page - Handle to the page, as returned by FPDF_LoadPage().
// Return Value:
// Whether the operation succeeded or not.
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FORM_SelectAllText(FPDF_FORMHANDLE hHandle, FPDF_PAGE page);
// Function: FORM_CanUndo
// Find out if it is possible for the current focused widget in a given
// form to perform an undo operation.
// Parameters:
// hHandle - Handle to the form fill module, as returned by
// FPDFDOC_InitFormFillEnvironment().
// page - Handle to the page, as returned by FPDF_LoadPage().
// Return Value:
// True if it is possible to undo.
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FORM_CanUndo(FPDF_FORMHANDLE hHandle,
FPDF_PAGE page);
// Function: FORM_CanRedo
// Find out if it is possible for the current focused widget in a given
// form to perform a redo operation.
// Parameters:
// hHandle - Handle to the form fill module, as returned by
// FPDFDOC_InitFormFillEnvironment().
// page - Handle to the page, as returned by FPDF_LoadPage().
// Return Value:
// True if it is possible to redo.
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FORM_CanRedo(FPDF_FORMHANDLE hHandle,
FPDF_PAGE page);
// Function: FORM_Undo
// Make the current focused widget perform an undo operation.
// Parameters:
// hHandle - Handle to the form fill module, as returned by
// FPDFDOC_InitFormFillEnvironment().
// page - Handle to the page, as returned by FPDF_LoadPage().
// Return Value:
// True if the undo operation succeeded.
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FORM_Undo(FPDF_FORMHANDLE hHandle,
FPDF_PAGE page);
// Function: FORM_Redo
// Make the current focused widget perform a redo operation.
// Parameters:
// hHandle - Handle to the form fill module, as returned by
// FPDFDOC_InitFormFillEnvironment().
// page - Handle to the page, as returned by FPDF_LoadPage().
// Return Value:
// True if the redo operation succeeded.
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FORM_Redo(FPDF_FORMHANDLE hHandle,
FPDF_PAGE page);
// Function: FORM_ForceToKillFocus.
// Call this member function to force to kill the focus of the form
// field which has focus. If it would kill the focus of a form field,
// save the value of form field if was changed by theuser.
// Parameters:
// hHandle - Handle to the form fill module, as returned by
// FPDFDOC_InitFormFillEnvironment().
// Return Value:
// True indicates success; otherwise false.
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FORM_ForceToKillFocus(FPDF_FORMHANDLE hHandle);
// Experimental API.
// Function: FORM_GetFocusedAnnot.
// Call this member function to get the currently focused annotation.
// Parameters:
// handle - Handle to the form fill module, as returned by
// FPDFDOC_InitFormFillEnvironment().
// page_index - Buffer to hold the index number of the page which
// contains the focused annotation. 0 for the first page.
// Can't be NULL.
// annot - Buffer to hold the focused annotation. Can't be NULL.
// Return Value:
// On success, return true and write to the out parameters. Otherwise
// return false and leave the out parameters unmodified.
// Comments:
// Not currently supported for XFA forms - will report no focused
// annotation.
// Must call FPDFPage_CloseAnnot() when the annotation returned in |annot|
// by this function is no longer needed.
// This will return true and set |page_index| to -1 and |annot| to NULL,
// if there is no focused annotation.
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FORM_GetFocusedAnnot(FPDF_FORMHANDLE handle,
int* page_index,
FPDF_ANNOTATION* annot);
// Experimental API.
// Function: FORM_SetFocusedAnnot.
// Call this member function to set the currently focused annotation.
// Parameters:
// handle - Handle to the form fill module, as returned by
// FPDFDOC_InitFormFillEnvironment().
// annot - Handle to an annotation.
// Return Value:
// True indicates success; otherwise false.
// Comments:
// |annot| can't be NULL. To kill focus, use FORM_ForceToKillFocus()
// instead.
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FORM_SetFocusedAnnot(FPDF_FORMHANDLE handle, FPDF_ANNOTATION annot);
// Form Field Types
// The names of the defines are stable, but the specific values associated with
// them are not, so do not hardcode their values.
#define FPDF_FORMFIELD_UNKNOWN 0 // Unknown.
#define FPDF_FORMFIELD_PUSHBUTTON 1 // push button type.
#define FPDF_FORMFIELD_CHECKBOX 2 // check box type.
#define FPDF_FORMFIELD_RADIOBUTTON 3 // radio button type.
#define FPDF_FORMFIELD_COMBOBOX 4 // combo box type.
#define FPDF_FORMFIELD_LISTBOX 5 // list box type.
#define FPDF_FORMFIELD_TEXTFIELD 6 // text field type.
#define FPDF_FORMFIELD_SIGNATURE 7 // text field type.
#ifdef PDF_ENABLE_XFA
#define FPDF_FORMFIELD_XFA 8 // Generic XFA type.
#define FPDF_FORMFIELD_XFA_CHECKBOX 9 // XFA check box type.
#define FPDF_FORMFIELD_XFA_COMBOBOX 10 // XFA combo box type.
#define FPDF_FORMFIELD_XFA_IMAGEFIELD 11 // XFA image field type.
#define FPDF_FORMFIELD_XFA_LISTBOX 12 // XFA list box type.
#define FPDF_FORMFIELD_XFA_PUSHBUTTON 13 // XFA push button type.
#define FPDF_FORMFIELD_XFA_SIGNATURE 14 // XFA signture field type.
#define FPDF_FORMFIELD_XFA_TEXTFIELD 15 // XFA text field type.
#endif // PDF_ENABLE_XFA
#ifdef PDF_ENABLE_XFA
#define FPDF_FORMFIELD_COUNT 16
#else // PDF_ENABLE_XFA
#define FPDF_FORMFIELD_COUNT 8
#endif // PDF_ENABLE_XFA
#ifdef PDF_ENABLE_XFA
#define IS_XFA_FORMFIELD(type) \
(((type) == FPDF_FORMFIELD_XFA) || \
((type) == FPDF_FORMFIELD_XFA_CHECKBOX) || \
((type) == FPDF_FORMFIELD_XFA_COMBOBOX) || \
((type) == FPDF_FORMFIELD_XFA_IMAGEFIELD) || \
((type) == FPDF_FORMFIELD_XFA_LISTBOX) || \
((type) == FPDF_FORMFIELD_XFA_PUSHBUTTON) || \
((type) == FPDF_FORMFIELD_XFA_SIGNATURE) || \
((type) == FPDF_FORMFIELD_XFA_TEXTFIELD))
#endif // PDF_ENABLE_XFA
// Function: FPDFPage_HasFormFieldAtPoint
// Get the form field type by point.
// Parameters:
// hHandle - Handle to the form fill module. Returned by
// FPDFDOC_InitFormFillEnvironment().
// page - Handle to the page. Returned by FPDF_LoadPage().
// page_x - X position in PDF "user space".
// page_y - Y position in PDF "user space".
// Return Value:
// Return the type of the form field; -1 indicates no field.
// See field types above.
FPDF_EXPORT int FPDF_CALLCONV
FPDFPage_HasFormFieldAtPoint(FPDF_FORMHANDLE hHandle,
FPDF_PAGE page,
double page_x,
double page_y);
// Function: FPDFPage_FormFieldZOrderAtPoint
// Get the form field z-order by point.
// Parameters:
// hHandle - Handle to the form fill module. Returned by
// FPDFDOC_InitFormFillEnvironment().
// page - Handle to the page. Returned by FPDF_LoadPage().
// page_x - X position in PDF "user space".
// page_y - Y position in PDF "user space".
// Return Value:
// Return the z-order of the form field; -1 indicates no field.
// Higher numbers are closer to the front.
FPDF_EXPORT int FPDF_CALLCONV
FPDFPage_FormFieldZOrderAtPoint(FPDF_FORMHANDLE hHandle,
FPDF_PAGE page,
double page_x,
double page_y);
// Function: FPDF_SetFormFieldHighlightColor
// Set the highlight color of the specified (or all) form fields
// in the document.
// Parameters:
// hHandle - Handle to the form fill module, as returned by
// FPDFDOC_InitFormFillEnvironment().
// doc - Handle to the document, as returned by
// FPDF_LoadDocument().
// fieldType - A 32-bit integer indicating the type of a form
// field (defined above).
// color - The highlight color of the form field. Constructed by
// 0xxxrrggbb.
// Return Value:
// None.
// Comments:
// When the parameter fieldType is set to FPDF_FORMFIELD_UNKNOWN, the
// highlight color will be applied to all the form fields in the
// document.
// Please refresh the client window to show the highlight immediately
// if necessary.
FPDF_EXPORT void FPDF_CALLCONV
FPDF_SetFormFieldHighlightColor(FPDF_FORMHANDLE hHandle,
int fieldType,
unsigned long color);
// Function: FPDF_SetFormFieldHighlightAlpha
// Set the transparency of the form field highlight color in the
// document.
// Parameters:
// hHandle - Handle to the form fill module, as returned by
// FPDFDOC_InitFormFillEnvironment().
// doc - Handle to the document, as returaned by
// FPDF_LoadDocument().
// alpha - The transparency of the form field highlight color,
// between 0-255.
// Return Value:
// None.
FPDF_EXPORT void FPDF_CALLCONV
FPDF_SetFormFieldHighlightAlpha(FPDF_FORMHANDLE hHandle, unsigned char alpha);
// Function: FPDF_RemoveFormFieldHighlight
// Remove the form field highlight color in the document.
// Parameters:
// hHandle - Handle to the form fill module, as returned by
// FPDFDOC_InitFormFillEnvironment().
// Return Value:
// None.
// Comments:
// Please refresh the client window to remove the highlight immediately
// if necessary.
FPDF_EXPORT void FPDF_CALLCONV
FPDF_RemoveFormFieldHighlight(FPDF_FORMHANDLE hHandle);
// Function: FPDF_FFLDraw
// Render FormFields and popup window on a page to a device independent
// bitmap.
// Parameters:
// hHandle - Handle to the form fill module, as returned by
// FPDFDOC_InitFormFillEnvironment().
// bitmap - Handle to the device independent bitmap (as the
// output buffer). Bitmap handles can be created by
// FPDFBitmap_Create().
// page - Handle to the page, as returned by FPDF_LoadPage().
// start_x - Left pixel position of the display area in the
// device coordinates.
// start_y - Top pixel position of the display area in the device
// coordinates.
// size_x - Horizontal size (in pixels) for displaying the page.
// size_y - Vertical size (in pixels) for displaying the page.
// rotate - Page orientation: 0 (normal), 1 (rotated 90 degrees
// clockwise), 2 (rotated 180 degrees), 3 (rotated 90
// degrees counter-clockwise).
// flags - 0 for normal display, or combination of flags
// defined above.
// Return Value:
// None.
// Comments:
// This function is designed to render annotations that are
// user-interactive, which are widget annotations (for FormFields) and
// popup annotations.
// With the FPDF_ANNOT flag, this function will render a popup annotation
// when users mouse-hover on a non-widget annotation. Regardless of
// FPDF_ANNOT flag, this function will always render widget annotations
// for FormFields.
// In order to implement the FormFill functions, implementation should
// call this function after rendering functions, such as
// FPDF_RenderPageBitmap() or FPDF_RenderPageBitmap_Start(), have
// finished rendering the page contents.
FPDF_EXPORT void FPDF_CALLCONV FPDF_FFLDraw(FPDF_FORMHANDLE hHandle,
FPDF_BITMAP bitmap,
FPDF_PAGE page,
int start_x,
int start_y,
int size_x,
int size_y,
int rotate,
int flags);
#if defined(PDF_USE_SKIA)
FPDF_EXPORT void FPDF_CALLCONV FPDF_FFLDrawSkia(FPDF_FORMHANDLE hHandle,
FPDF_SKIA_CANVAS canvas,
FPDF_PAGE page,
int start_x,
int start_y,
int size_x,
int size_y,
int rotate,
int flags);
#endif
// Experimental API
// Function: FPDF_GetFormType
// Returns the type of form contained in the PDF document.
// Parameters:
// document - Handle to document.
// Return Value:
// Integer value representing one of the FORMTYPE_ values.
// Comments:
// If |document| is NULL, then the return value is FORMTYPE_NONE.
FPDF_EXPORT int FPDF_CALLCONV FPDF_GetFormType(FPDF_DOCUMENT document);
// Experimental API
// Function: FORM_SetIndexSelected
// Selects/deselects the value at the given |index| of the focused
// annotation.
// Parameters:
// hHandle - Handle to the form fill module. Returned by
// FPDFDOC_InitFormFillEnvironment.
// page - Handle to the page. Returned by FPDF_LoadPage
// index - 0-based index of value to be set as
// selected/unselected
// selected - true to select, false to deselect
// Return Value:
// TRUE if the operation succeeded.
// FALSE if the operation failed or widget is not a supported type.
// Comments:
// Intended for use with listbox/combobox widget types. Comboboxes
// have at most a single value selected at a time which cannot be
// deselected. Deselect on a combobox is a no-op that returns false.
// Default implementation is a no-op that will return false for
// other types.
// Not currently supported for XFA forms - will return false.
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FORM_SetIndexSelected(FPDF_FORMHANDLE hHandle,
FPDF_PAGE page,
int index,
FPDF_BOOL selected);
// Experimental API
// Function: FORM_IsIndexSelected
// Returns whether or not the value at |index| of the focused
// annotation is currently selected.
// Parameters:
// hHandle - Handle to the form fill module. Returned by
// FPDFDOC_InitFormFillEnvironment.
// page - Handle to the page. Returned by FPDF_LoadPage
// index - 0-based Index of value to check
// Return Value:
// TRUE if value at |index| is currently selected.
// FALSE if value at |index| is not selected or widget is not a
// supported type.
// Comments:
// Intended for use with listbox/combobox widget types. Default
// implementation is a no-op that will return false for other types.
// Not currently supported for XFA forms - will return false.
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV
FORM_IsIndexSelected(FPDF_FORMHANDLE hHandle, FPDF_PAGE page, int index);
// Function: FPDF_LoadXFA
// If the document consists of XFA fields, call this method to
// attempt to load XFA fields.
// Parameters:
// document - Handle to document from FPDF_LoadDocument().
// Return Value:
// TRUE upon success, otherwise FALSE. If XFA support is not built
// into PDFium, performs no action and always returns FALSE.
FPDF_EXPORT FPDF_BOOL FPDF_CALLCONV FPDF_LoadXFA(FPDF_DOCUMENT document);
#ifdef __cplusplus
}
#endif
#endif // PUBLIC_FPDF_FORMFILL_H_