Merge to XFA: Create top-level public/ header directory.

Original Review URL: https://codereview.chromium.org/1135913002

BUG=pdfium:154
R=thestig@chromium.org

Review URL: https://codereview.chromium.org/1136703003

1 files changed, 1261 insertions, 0 deletions

diff --git a/public/fpdf_formfill.h b/public/fpdf_formfill.h
new file mode 100644
index 0000000000..5191fd75a8
--- /dev/null
+++ b/public/fpdf_formfill.h
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+// Copyright 2014 PDFium Authors. All rights reserved.
+// 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 _FPDFORMFILL_H
+#define _FPDFORMFILL_H
+#include "fpdfview.h"
+
+typedef void* FPDF_FORMHANDLE;
+
+#define DOCTYPE_PDF          0 //Normal pdf Document
+#define DOCTYPE_DYNIMIC_XFA  1 //Dynimic xfa Document Type
+#define DOCTYPE_STATIC_XFA   2 //Static xfa Document Type
+
+// Exported Functions
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct _IPDF_JsPlatform
+{
+/**
+* Version number of the interface. Currently must be 1.
+	**/
+	int version;
+	
+	/** 
+	* 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 stype of button group. 
+	*							0-OK(default);
+	*							1-OK,Cancel;
+	*							2-Yes,NO; 
+	*							3-Yes, NO, Cancel.
+	*           nIcon		-   The Icon type. 
+	*							0-Error(default);
+	*							1-Warning;
+	*							2-Question;
+	*							3-Status.
+	*							4-Asterisk
+
+	* Return Value:
+	*			The return value could be the folowing type:
+	*							1-OK;
+	*							2-Cancel; 
+	*							3-NO;
+	*							4-Yes;
+	*/
+	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.
+	*							0 - Error
+	*							1 - Warning
+	*							2 - Question
+	*							3 - Status
+	*							4 - Default (default value)
+	* 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 show as asterisks (*) or bullets (?) to mask the response, which might be sensitive information. The default is false.
+	*			response	-	A string buffer allocated by SDK, to receive the user's response.
+	*			length		-   The length of the buffer, number of bytes. Currently, It's always be 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 be always input in 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 then 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.
+	*/
+	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, number of bytes. Can be 0.
+	* Return Value:
+	*		Number of bytes the filePath consumes, including trailing zeros.
+	* Comments:
+	*		The filePath shoule be always input in local encoding.
+	*/
+	int  (*Field_browse)(struct _IPDF_JsPlatform* pThis, void* filePath, int length);
+
+	/**
+	*	pointer to FPDF_FORMFILLINFO interface.
+	**/
+	void*	m_pFormfillinfo;
+} 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
+
+/**
+ * Declares of a pointer type to the callback function for 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;
+
+//XFA
+/**
+ * @name Pageview  event flags
+ */
+/*@{*/
+/** @brief After a new pageview is added. */
+#define  FXFA_PAGEVIEWEVENT_POSTADDED		1
+/** @brief After a pageview is removed. */
+#define  FXFA_PAGEVIEWEVENT_POSTREMOVED 	3
+/*@}*/
+
+// menu
+/**
+ * @name Macro Definitions for Right Context Menu Features Of XFA Fields
+ */
+/*@{*/
+#define	 FXFA_MEMU_COPY			1
+#define  FXFA_MEMU_CUT			2
+#define  FXFA_MEMU_SELECTALL	4
+#define  FXFA_MEMU_UNDO			8
+#define  FXFA_MEMU_REDO			16
+#define  FXFA_MEMU_PASTE		32
+/*@}*/
+
+// file type
+/**
+ * @name Macro Definitions for File Type.
+ */
+/*@{*/
+#define FXFA_SAVEAS_XML		1
+#define FXFA_SAVEAS_XDP		2
+/*@}*/
+
+typedef struct  _FPDF_FORMFILLINFO
+{
+	/**
+	 * Version number of the interface. Currently must be 2 (with XFA module).
+	 **/
+	int	version;
+
+		/** 
+	 * Method: Release
+	 *			Give implementation a chance to release any data after the interface is no longer used
+	 * Interface Version:
+	 *			1
+	 * Implementation Required:
+	 *			No
+	 * Comments:
+	 *			Called by Foxit SDK 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 function.
+	 *			left		-	Left position of the client area in PDF page coordinate.
+	 *			top			-	Top  position of the client area in PDF page coordinate.
+	 *			right		-	Right position of the client area in PDF page  coordinate.
+	 *			bottom		-	Bottom position of the client area in PDF page coordinate.
+	 * Return Value:
+	 *			None.
+	 *
+	 *comments:
+	 *			All positions are measured in PDF "user space".
+	 *			Implementation should call FPDF_RenderPageBitmap() function for repainting a 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 user is taking the mouse to select texts on a form field, this callback function will keep 
+	 *			returning the selected areas to the implementation.
+	 *
+	 * Interface Version:
+	 *			1
+	 * Implementation Required:
+	 *			No
+	 * Parameters:
+	 *			pThis		-	Pointer to the interface structure itself.
+	 *			page		-	Handle to the page. Returned by FPDF_LoadPage function.
+	 *			left		-	Left position of the client area in PDF page coordinate.
+	 *			top			-	Top  position of the client area in PDF page coordinate.
+	 *			right		-	Right position of the client area in PDF page  coordinate.
+	 *			bottom		-	Bottom position of the client area in PDF page coordinate.
+	 * Return Value:
+	 *			None.
+	 *
+	 * comments:
+	 *			This CALLBACK function is useful for implementing special text selection effect. Implementation should
+	 *			first records the returned rectangles, then draw them one by one at the painting period, last,remove all 
+	 *			the recorded rectangles when finish 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 the details.
+	* 	Return value:
+	* 		None.
+	* */
+	void (*FFI_SetCursor)(struct _FPDF_FORMFILLINFO* pThis, int nCursorType);
+
+	/** 
+	* Method: FFI_SetTimer
+	*			This method installs a system timer. A time-out value is specified, 
+	*			and every time a time-out occurs, the system passes a message to
+	*			the TimerProc callback 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 kills the timer event identified by nIDEvent, 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 return 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:
+	* 		None.
+	* */
+	FPDF_SYSTEMTIME (*FFI_GetLocalTime)(struct _FPDF_FORMFILLINFO* pThis);
+
+	/** 
+	* Method: FFI_OnChange
+	*			This method will be invoked to notify 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 pointer 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 function.
+	*		nPageIndex  -	Index number of the page. 0 for the first page.
+	* Return value:
+	* 		Handle to the page. Returned by FPDF_LoadPage function.
+	* Comments:
+	*		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, implementation need to load the page for SDK.
+	* */
+	FPDF_PAGE	(*FFI_GetPage)(struct _FPDF_FORMFILLINFO* pThis, FPDF_DOCUMENT document, int nPageIndex);
+
+	/** 
+	* Method: FFI_GetCurrentPage
+	*		This method receives the current page pointer.
+	* Interface Version:
+	*			1
+	* Implementation Required:
+	*			yes
+	* Parameters:
+	*		pThis		-	Pointer to the interface structure itself.
+	*		document	-	Handle to document. Returned by FPDF_LoadDocument function.
+	* Return value:
+	* 		Handle to the page. Returned by FPDF_LoadPage function.
+	* */
+	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. Returned by FPDF_LoadPage function.
+	* Return value:
+	* 		The page rotation. Should be 0(0 degree),1(90 degree),2(180 degree),3(270 degree), in a clockwise direction.
+	* */
+	int 	(*FFI_GetRotation)(struct _FPDF_FORMFILLINFO* pThis, FPDF_PAGE page);
+
+	/** 
+	* Method: FFI_ExecuteNamedAction
+	*			This method will execute an 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 the named actions description of <<PDF Reference, version 1.7>> for more details.  
+	* */
+	void 	(*FFI_ExecuteNamedAction)(struct _FPDF_FORMFILLINFO* pThis, FPDF_BYTESTRING namedAction);
+	/** 
+	* @brief This method will be called when a text field is getting or losing a focus.
+	*
+	* @param[in] pThis		Pointer to the interface structure itself.
+	* @param[in] value		The string value of the form field, in UTF-16LE format.
+	* @param[in] valueLen	The length of the string value, number of characters (not bytes).
+	* @param[in] is_focus	True if the form field is getting a focus, False for losing a focus.
+	*
+	* @return None.
+	*
+	* @note Currently,only support text field and combobox field.
+	* */
+	void	(*FFI_SetTextFieldFocus)(struct _FPDF_FORMFILLINFO* pThis, FPDF_WIDESTRING value, FPDF_DWORD valueLen, FPDF_BOOL is_focus);
+
+	
+	/** 
+	* Method: FFI_DoURIAction
+	*			This action resolves 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:
+	*		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 Macros "PDFZOOM_XXX" defined in "fpdfdoc.h". 
+	*		fPosArray		-	The float array which carries the position info.
+	*		sizeofArray		-	The size of float array.
+	* 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
+  **/
+  IPDF_JSPLATFORM*	m_pJsPlatform;
+
+  /**
+	* Method: FFI_DisplayCaret
+	*			This method will show the caret at specified position.
+	* Interface Version:
+	*			1
+	* Implementation Required:
+	*			yes
+	* Parameters:
+	*		pThis			-	Pointer to the interface structure itself.
+	*		page			-	Handle to page. Returned by FPDF_LoadPage function.
+	*		left			-	Left position of the client area in PDF page coordinate. 
+	*		top				-	Top position of the client area in PDF page coordinate.
+	*		right			-	Right position of the client area in PDF page coordinate.
+	*		bottom			-	Bottom position of the client area in PDF page coordinate.
+	* 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:
+	*			1
+	* Implementation Required:
+	*			yes
+	* Parameters:
+	*		pThis			-	Pointer to the interface structure itself.
+	*		document		-	Handle to document. Returned by FPDF_LoadDocument function.
+	* 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:
+	*			1
+	* Implementation Required:
+	*			yes
+	* Parameters:
+	*		pThis			-	Pointer to the interface structure itself.
+	*		document		-	Handle to document. Returned by FPDF_LoadDocument function.
+	*		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 link to the specified URL.
+	* Interface Version:
+	*			1
+	* Implementation Required:
+	*			no
+	* Parameters:
+	*		pThis			-	Pointer to the interface structure itself.
+	*		document		-	Handle to document. Returned by FPDF_LoadDocument function.
+	*		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:
+	*			1
+	* Implementation Required:
+	*			yes
+	* Parameters:
+	*		pThis			-	Pointer to the interface structure itself.
+	*		page			-	Handle to page. Returned by FPDF_LoadPage function.
+	*		left			-	The pointer to receive left position of the page view area in PDF page coordinate. 
+	*		top				-	The pointer to receive top position of the page view area in PDF page coordinate.
+	*		right			-	The pointer to receive right position of the client area in PDF page coordinate.
+	*		bottom			-	The pointer to receive bottom position of the client area in PDF page coordinate.
+	* Return value:
+	* 		None.
+	**/
+	void	(*FFI_GetPageViewRect)(struct _FPDF_FORMFILLINFO* pThis, FPDF_PAGE page, double* left, double* top, double* right, double* bottom);
+	/** 
+	* Method: FFI_PopupMenu
+	*			This method will track the right context menu for XFA fields.
+	* Interface Version:
+	*			1
+	* Implementation Required:
+	*			yes
+	* Parameters:
+	*		pThis			-	Pointer to the interface structure itself.
+	*		page			-	Handle to page. Returned by FPDF_LoadPage function.
+	*		hWidget			-	Handle to XFA fields.
+	*		menuFlag		-	The menu flags. Please refer to macro definition of FXFA_MEMU_XXX and this can be one or a combination of these macros.
+	*		x				-	X position of the client area in PDF page coordinate.
+	*		y				-	Y position of the client area in PDF page coordinate.
+	* 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
+	*			1
+	* Implementation Required:
+	*			yes
+	* Parameters:
+	*		pThis			-	Pointer to the interface structure itself.
+	*		fileFlag		-	The file flag.Please refer to macro definition of FXFA_SAVEAS_XXX and this can be one of these macros.
+	*		wsURL			-	The string value of the file URL, in UTF-16LE format.
+	*		mode			-	The mode for open file.
+	* 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 contacter.
+	* Interface Version:
+	*			1
+	* Implementation Required:
+	*			yes
+	* 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 get upload the specified file stream to the specified URL.
+	* Interface Version:
+	*			1
+	* Implementation Required: 
+	*			yes
+	* 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 this can be 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:
+	*			1
+	* Implementation Required: 
+	*			yes
+	* Parameters:
+	*		pThis			-	Pointer to the interface structure itself.
+	*		platform		-	Pointer to the data buffer to receive the platform.Can be NULL,in UTF-16LE format.
+	*		length			-   The length of the buffer, number of bytes. Can be 0.
+	* 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:
+	*			1
+	* Implementation Required: 
+	*			yes
+	* 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, number of bytes. Can be 0.
+	* 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:
+	*			1
+	* Implementation Required: 
+	*			yes
+	* 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_LPFILEHANDLER	(*FFI_DownloadFromURL)(struct _FPDF_FORMFILLINFO* pThis, FPDF_WIDESTRING URL);
+	/** 
+	* Method: FFI_PostRequestURL
+	*			This method will post the request to the server URL.
+	* Interface Version:
+	*			1
+	* Implementation Required: 
+	*			yes
+	* 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 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* respone);
+	/** 
+	* Method: FFI_PutRequestURL
+	*			This method will put the request to the server URL.
+	* Interface Version:
+	*			1
+	* Implementation Required: 
+	*			yes
+	* 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);
+
+} FPDF_FORMFILLINFO;
+
+
+
+/**
+ * Function: FPDFDOC_InitFormFillEnvironment
+ *			Init form fill environment. 
+ * Comments:
+ *			This function should be called before any form fill operation.
+ * Parameters:
+ *			document		-	Handle to document. Returned by FPDF_LoadDocument function.
+ *			pFormFillInfo	-	Pointer to a FPDF_FORMFILLINFO structure.
+ * Return Value:
+ *			Return handler to the form fill module. NULL means fails. 
+ **/
+DLLEXPORT FPDF_FORMHANDLE STDCALL FPDFDOC_InitFormFillEnvironment(FPDF_DOCUMENT document, FPDF_FORMFILLINFO* formInfo);
+
+/**
+ * Function: FPDFDOC_ExitFormFillEnvironment
+ *			Exit form fill environment. 
+ * Parameters:
+ *			hHandle		-	Handle to the form fill module. Returned by FPDFDOC_InitFormFillEnvironment.
+ * Return Value:
+ *			NULL.
+ **/
+DLLEXPORT void STDCALL 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 method FPDFDOC_InitFormFillEnvironment had been invoked.
+ * Parameters:
+ *			hHandle		-	Handle to the form fill module. Returned by FPDFDOC_InitFormFillEnvironment.
+ * Return Value:
+ *			NONE.
+ **/
+DLLEXPORT void STDCALL 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 
+ *			close the PDF page.
+ * Parameters:
+ *			page		-	Handle to the page. Returned by FPDF_LoadPage function.
+ *			hHandle		-	Handle to the form fill module. Returned by FPDFDOC_InitFormFillEnvironment.
+ * Return Value:
+ *			NONE.
+ **/
+DLLEXPORT void STDCALL FORM_OnBeforeClosePage(FPDF_PAGE page, FPDF_FORMHANDLE hHandle);
+
+/**
+* Function: FORM_DoDocumentJSAction
+*			This method is required for performing Document-level JavaScript action. It should be invoked after the PDF document
+*			had been loaded.
+* Parameters:
+*			hHandle		-	Handle to the form fill module. 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.
+**/
+DLLEXPORT void STDCALL 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. Returned by FPDFDOC_InitFormFillEnvironment.
+* Return Value:
+*			NONE
+* Comments:
+*			This method will do nothing if there is no open-actions embedded in the document. 
+**/
+DLLEXPORT void STDCALL FORM_DoDocumentOpenAction(FPDF_FORMHANDLE hHandle);
+
+
+// additional actions type of document.
+#define FPDFDOC_AACTION_WC		0x10		//WC, before closing document, JavaScript action.
+#define FPDFDOC_AACTION_WS		0x11		//WS, before saving document, JavaScript action.
+#define FPDFDOC_AACTION_DS		0x12		//DS, after saving document, JavaScript action.
+#define FPDFDOC_AACTION_WP		0x13		//WP, before printing document, JavaScript action.
+#define FPDFDOC_AACTION_DP		0x14		//DP, after printing document, JavaScript action. 
+/**
+* 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.
+**/
+
+DLLEXPORT void STDCALL FORM_DoDocumentAAction(FPDF_FORMHANDLE hHandle, int aaType);
+
+// Additional-action types of page object
+#define FPDFPAGE_AACTION_OPEN		0		// /O -- An action to be performed when the page is opened
+#define FPDFPAGE_AACTION_CLOSE		1		// /C -- An action to be performed when the page is closed
+
+/**
+* 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. Returned by FPDF_LoadPage function.
+*			hHandle		-	Handle to the form fill module. 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.
+**/
+DLLEXPORT void STDCALL FORM_DoPageAAction(FPDF_PAGE page, FPDF_FORMHANDLE hHandle, int aaType);
+
+/**
+ * Function: FORM_OnMouseMove
+ *			You can call this member function when the mouse cursor moves. 
+ * Parameters:
+ *			hHandle		-	Handle to the form fill module. Returned by FPDFDOC_InitFormFillEnvironment.
+ *			page		-	Handle to the page. Returned by FPDF_LoadPage function.
+ *			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.
+ **/
+DLLEXPORT FPDF_BOOL STDCALL FORM_OnMouseMove(FPDF_FORMHANDLE hHandle,FPDF_PAGE page, int modifier, double page_x, double page_y);
+
+/**
+ * Function: FORM_OnLButtonDown
+ *			You can call this member function when the user presses the left mouse button.
+ * Parameters:
+ *			hHandle		-	Handle to the form fill module. Returned by FPDFDOC_InitFormFillEnvironment.
+ *			page		-	Handle to the page. Returned by FPDF_LoadPage function.
+ *			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.
+ **/
+DLLEXPORT FPDF_BOOL STDCALL FORM_OnLButtonDown(FPDF_FORMHANDLE hHandle,FPDF_PAGE page, int modifier, double page_x, double page_y);
+
+/**
+ * Function: FORM_OnLButtonUp
+ *			You can call this member function when the user releases the left mouse button.
+ * Parameters:
+ *			hHandle		-	Handle to the form fill module. Returned by FPDFDOC_InitFormFillEnvironment.
+ *			page		-	Handle to the page. Returned by FPDF_LoadPage function.
+ *			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.
+ **/
+DLLEXPORT FPDF_BOOL STDCALL FORM_OnLButtonUp(FPDF_FORMHANDLE hHandle,FPDF_PAGE page, int modifier, double page_x, double page_y);
+
+DLLEXPORT FPDF_BOOL STDCALL FORM_OnRButtonDown(FPDF_FORMHANDLE hHandle, FPDF_PAGE page, int modifier, double page_x, double page_y);
+DLLEXPORT FPDF_BOOL STDCALL FORM_OnRButtonUp(FPDF_FORMHANDLE hHandle, FPDF_PAGE page, int modifier, double page_x, double page_y);
+
+/**
+ * Function: FORM_OnKeyDown
+ *			You can call this member function when a nonsystem key is pressed. 
+ * Parameters:
+ *			hHandle		-	Handle to the form fill module. Returned by FPDFDOC_InitFormFillEnvironment.
+ *			page		-	Handle to the page. Returned by FPDF_LoadPage function.
+ *			nKeyCode	-	Indicates whether various virtual keys are down. 
+ *			modifier	-	Contains the scan code, key-transition code, previous key state, and context code.
+ * Return Value:
+ *			TRUE indicates success; otherwise false.
+ **/
+DLLEXPORT FPDF_BOOL STDCALL FORM_OnKeyDown(FPDF_FORMHANDLE hHandle,FPDF_PAGE page, int nKeyCode, int modifier);
+
+/**
+ * Function: FORM_OnKeyUp
+ *			You can call this member function when a nonsystem key is released. 
+ * Parameters:
+ *			hHandle		-	Handle to the form fill module. Returned by FPDFDOC_InitFormFillEnvironment.
+ *			page		-	Handle to the page. Returned by FPDF_LoadPage function.
+ *			nKeyCode	-	The virtual-key code of the given key.
+ *			modifier	-	Contains the scan code, key-transition code, previous key state, and context code.
+ * Return Value:
+ *			TRUE indicates success; otherwise false.
+ **/
+DLLEXPORT FPDF_BOOL STDCALL FORM_OnKeyUp(FPDF_FORMHANDLE hHandle,FPDF_PAGE page, int nKeyCode, int modifier);
+
+/**
+ * Function: FORM_OnChar
+ *			You can call this member function when a keystroke translates to a nonsystem character.
+ * Parameters:
+ *			hHandle		-	Handle to the form fill module. Returned by FPDFDOC_InitFormFillEnvironment.
+ *			page		-	Handle to the page. Returned by FPDF_LoadPage function.
+ *			nChar		-	The character code value of the key.  
+ *			modifier	-	Contains the scan code, key-transition code, previous key state, and context code.
+ * Return Value:
+ *			TRUE indicates success; otherwise false.
+ **/
+DLLEXPORT FPDF_BOOL STDCALL FORM_OnChar(FPDF_FORMHANDLE hHandle,FPDF_PAGE page, int nChar, int modifier);
+
+/**
+ * Function: FORM_ForceToKillFocus.
+ *			You can call this member function to force to kill the focus of the form field which got focus.
+ *			It would kill the focus on the form field, save the value of form field if it's changed by user.
+ * Parameters:
+ *			hHandle		-	Handle to the form fill module. Returned by FPDFDOC_InitFormFillEnvironment.
+ * Return Value:
+ *			TRUE indicates success; otherwise false.
+ **/
+DLLEXPORT FPDF_BOOL STDCALL FORM_ForceToKillFocus(FPDF_FORMHANDLE hHandle);
+
+// Field Types
+#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_XFA			7		// text field type.
+/**
+ * Function: FPDPage_HasFormFieldAtPoint
+ *			Check the form filed position by point.
+ * Parameters:
+ *			hHandle		-	Handle to the form fill module. Returned by FPDFDOC_InitFormFillEnvironment.
+ *			page		-	Handle to the page. Returned by FPDF_LoadPage function.
+ *			page_x		-	X position in PDF "user space".
+ *			page_y		-	Y position in PDF "user space".
+ * Return Value:
+ *			Return the type of the formfiled; -1 indicates no fields.
+ **/
+DLLEXPORT int STDCALL FPDPage_HasFormFieldAtPoint(FPDF_FORMHANDLE hHandle,FPDF_PAGE page,double page_x, double page_y);
+
+/**
+ * Function: FPDF_SetFormFieldHighlightColor
+ *			Set the highlight color of specified or all the form fields in the document.
+ * Parameters:
+ *			hHandle		-	Handle to the form fill module. Returned by FPDFDOC_InitFormFillEnvironment.
+ *			doc			-	Handle to the document. Returned by FPDF_LoadDocument function.
+ *			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 zero, 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.
+ **/
+DLLEXPORT void STDCALL 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. Returned by FPDFDOC_InitFormFillEnvironment.
+ *			doc			-	Handle to the document. Returned by FPDF_LoadDocument function.
+ *			alpha		-	The transparency of the form field highlight color. between 0-255.
+ * Return Value:
+ *			NONE.
+ **/
+DLLEXPORT void STDCALL 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. Returned by FPDFDOC_InitFormFillEnvironment.
+ * Return Value:
+ *			NONE.
+ * Comments:
+ *			Please refresh the client window to remove the highlight immediately if necessary.
+ **/
+DLLEXPORT void STDCALL FPDF_RemoveFormFieldHighlight(FPDF_FORMHANDLE hHandle);
+
+/**
+* Function: FPDF_FFLDraw
+*			Render FormFeilds on a page to a device independent bitmap. 			
+* Parameters:
+*			hHandle		-	Handle to the form fill module. Returned by FPDFDOC_InitFormFillEnvironment.
+*			bitmap		-	Handle to the device independent bitmap (as the output buffer).
+*							Bitmap handle can be created by FPDFBitmap_Create function.
+*			page		-	Handle to the page. Returned by FPDF_LoadPage function.
+*			start_x		-	Left pixel position of the display area in the device coordinate.
+*			start_y		-	Top pixel position of the display area in the device coordinate.
+*			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 method is designed to only render annotations and FormFields on the page. 
+*			Without FPDF_ANNOT specified for flags, Rendering functions such as FPDF_RenderPageBitmap or FPDF_RenderPageBitmap_Start will only render page contents(without annotations) to a bitmap.
+*			In order to implement the FormFill functions,Implementation should call this method after rendering functions finish rendering the page contents.
+**/
+DLLEXPORT void STDCALL 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);
+/**
+ * Function: FPDF_HasXFAField
+ *                      This method is designed to check whether a pdf document has XFA fields.
+ * Parameters:
+ *                      document                -       Handle to document. Returned by FPDF_LoadDocument function.
+ *                      docType                 -       Document type defined as DOCTYPE_xxx.
+ * Return Value:
+ *                      TRUE indicates that the input document has XFA fields, otherwise FALSE.
+ **/
+DLLEXPORT FPDF_BOOL STDCALL FPDF_HasXFAField(FPDF_DOCUMENT document, int& docType);
+
+/**
+ * Function: FPDF_LoadXFA
+ *			If the document consists of XFA fields, there should call this method to load XFA fields.
+ * Parameters:
+ *			document		-	Handle to document. Returned by FPDF_LoadDocument function.
+ * Return Value:
+ *			TRUE indicates success,otherwise FALSE.
+ **/
+DLLEXPORT FPDF_BOOL STDCALL FPDF_LoadXFA(FPDF_DOCUMENT document);
+
+/**
+ * Function: FPDF_Widget_Undo
+ *			This method will implement the undo feature for the specified xfa field.
+ * Parameters:
+ *			document		-	Handle to document. Returned by FPDF_LoadDocument function.
+ *			hWidget			-	Handle to the xfa field.
+ * Return Value:
+ *			None.
+ **/
+DLLEXPORT void STDCALL FPDF_Widget_Undo(FPDF_DOCUMENT document, FPDF_WIDGET hWidget);
+/**
+ * Function: FPDF_Widget_Redo
+ *			This method will implement the redo feature for the specified xfa field.
+ * Parameters:
+ *			document		-	Handle to document. Returned by FPDF_LoadDocument function.
+ *			hWidget			-	Handle to the xfa field.
+ * Return Value:
+ *			None.
+ **/
+DLLEXPORT void STDCALL FPDF_Widget_Redo(FPDF_DOCUMENT document, FPDF_WIDGET hWidget);
+/**
+ * Function: FPDF_Widget_SelectAll
+ *			This method will implement the select all feature for the specified xfa field.
+ * Parameters:
+ *			document		-	Handle to document. Returned by FPDF_LoadDocument function.
+ *			hWidget			-	Handle to the xfa field.
+ * Return Value:
+ *			None.
+ **/
+DLLEXPORT void STDCALL FPDF_Widget_SelectAll(FPDF_DOCUMENT document, FPDF_WIDGET hWidget);
+/**
+ * Function: FPDF_Widget_Copy
+ *			This method will implement the copy feature for the specified xfa field.
+ * Parameters:
+ *			document		-	Handle to document. Returned by FPDF_LoadDocument function.
+ *			hWidget			-	Handle to the xfa field.
+ *			wsText			-	Pointer to data buffer to receive the copied data, in UTF-16LE format.
+ *			size			-	The data buffer size.
+ * Return Value:
+ *			None.
+ **/
+DLLEXPORT void STDCALL FPDF_Widget_Copy(FPDF_DOCUMENT document, FPDF_WIDGET hWidget, FPDF_WIDESTRING wsText, FPDF_DWORD* size);
+/**
+ * Function: FPDF_Widget_Cut
+ *			This method will implement the cut feature for the specified xfa field.
+ * Parameters:
+ *			document		-	Handle to document. Returned by FPDF_LoadDocument function.
+ *			hWidget			-	Handle to the xfa field.
+ *			wsText			-	Pointer to data buffer to receive the cut data,in UTF-16LE format.
+ *			size			-	The data buffer size,not the byte number.
+ * Return Value:
+ *			None.
+ **/
+DLLEXPORT void STDCALL FPDF_Widget_Cut(FPDF_DOCUMENT document, FPDF_WIDGET hWidget, FPDF_WIDESTRING wsText, FPDF_DWORD* size);
+/**
+ * Function: FPDF_Widget_Paste
+ *			This method will implement the paste feature for the specified xfa field.
+ * Parameters:
+ *			document		-	Handle to document. Returned by FPDF_LoadDocument function.
+ *			hWidget			-	Handle to the xfa field.
+ *			wsText			-	The paste text buffer, in UTF-16LE format.
+ *			size			-	The data buffer size,not the byte number.
+ * Return Value:
+ *			None.
+ **/
+DLLEXPORT void STDCALL FPDF_Widget_Paste(FPDF_DOCUMENT document, FPDF_WIDGET hWidget, FPDF_WIDESTRING wsText, FPDF_DWORD size);
+/**
+ * Function: FPDF_Widget_ReplaceSpellCheckWord
+ *			This method will implement the spell check feature for the specified xfa field.
+ * Parameters:
+ *			document		-	Handle to document. Returned by FPDF_LoadDocument function.
+ *			hWidget			-	Handle to the xfa field.
+ *			x				-	The x value of the specified point.
+ *			y				-	The y value of the specified point.
+ *			bsText			-	The text buffer needed to be speck check, in UTF-16LE format.
+ * Return Value:
+ *			None.
+ **/
+DLLEXPORT void STDCALL FPDF_Widget_ReplaceSpellCheckWord(FPDF_DOCUMENT document, FPDF_WIDGET hWidget, float x, float y, FPDF_BYTESTRING bsText);
+/**
+ * Function: FPDF_Widget_GetSpellCheckWords
+ *			This method will implement the spell check feature for the specified xfa field.
+ * Parameters:
+ *			document		-	Handle to document. Returned by FPDF_LoadDocument function.
+ *			hWidget			-	Handle to the xfa field.
+ *			x				-	The x value of the specified point.
+ *			y				-	The y value of the specified point.
+ *			stringHandle	-	Pointer to FPDF_STRINGHANDLE to receive the speck check text buffer, in UTF-16LE format.
+ * Return Value:
+ *			None.
+ **/
+DLLEXPORT void STDCALL FPDF_Widget_GetSpellCheckWords(FPDF_DOCUMENT document, FPDF_WIDGET hWidget, float x, float y, FPDF_STRINGHANDLE* stringHandle);
+/**
+ * Function: FPDF_StringHandleCounts
+ *			This method will get the count of the text buffer.
+ * Parameters:
+ *			stringHandle	-	Pointer to FPDF_STRINGHANDLE.
+ * Return Value:
+ *			None.
+ **/
+DLLEXPORT int STDCALL FPDF_StringHandleCounts(FPDF_STRINGHANDLE stringHandle);
+/**
+ * Function: FPDF_StringHandleGetStringByIndex
+ *			This method will get the specified index of the text buffer.
+ * Parameters:
+ *			stringHandle	-	Pointer to FPDF_STRINGHANDLE.
+ *			index			-	The specified index of text buffer.
+ *			bsText			-	Pointer to data buffer to receive the text buffer, in UTF-16LE format.
+ *			size			-	The byte size of data buffer.
+ * Return Value:
+ *			TRUE indicates success, otherwise FALSE.
+ **/
+DLLEXPORT FPDF_BOOL STDCALL FPDF_StringHandleGetStringByIndex(FPDF_STRINGHANDLE stringHandle, int index, FPDF_BYTESTRING bsText, FPDF_DWORD* size);
+/**
+ * Function: FPDF_StringHandleRelease
+ *			This method will release the FPDF_STRINGHANDLE.
+ * Parameters:
+ *			stringHandle	-	Pointer to FPDF_STRINGHANDLE.
+ * Return Value:
+ *			None.
+ **/
+DLLEXPORT void STDCALL FPDF_StringHandleRelease(FPDF_STRINGHANDLE stringHandle);
+/**
+ * Function: FPDF_StringHandleAddString
+ *			This method will add the specified text buffer.
+ * Parameters:
+ *			stringHandle	-	Pointer to FPDF_STRINGHANDLE.
+ *			bsText			-	Pointer to data buffer of the text buffer, in UTF-16LE format.
+ *			size			-	The byte size of data buffer.
+ * Return Value:
+ *			TRUE indicates success, otherwise FALSE.
+ **/
+DLLEXPORT FPDF_BOOL STDCALL FPDF_StringHandleAddString(FPDF_STRINGHANDLE stringHandle, FPDF_BYTESTRING bsText, FPDF_DWORD size);
+
+#ifdef __cplusplus
+};
+#endif
+
+#endif //_FPDFORMFILL_H
+