Tidy public/ directory.

public/fpdf_formfill.h

 // 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 PUBLIC_FPDF_FORMFILL_H_
+#define PUBLIC_FPDF_FORMFILL_H_
 
-#ifndef _FPDFORMFILL_H
-#define _FPDFORMFILL_H
 #include "fpdfview.h"
 
 typedef void* FPDF_FORMHANDLE;
 
 // 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.
-        * 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;
+    **/
+    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.
+    * 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
+#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. 
+ *          idEvent     -   Identifier of the timer.
  * Return value:
- *                      None. 
- **/    
-typedef void    (*TimerCallback)(int idEvent);
+ *          None.
+ **/
+typedef void    (*TimerCallback)(int idEvent);
 
 /**
  * Declares of a struct type to the local system time.
 **/
-typedef struct _FPDF_SYSTEMTIME 
+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] */
+    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;
 
 
 typedef struct  _FPDF_FORMFILLINFO
 {
-        /**
-         * Version number of the interface. Currently must be 1.
-         **/
-        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;
+    /**
+     * Version number of the interface. Currently must be 1.
+     **/
+    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;
 
 } FPDF_FORMFILLINFO;
 
 
 
 /**
  * Function: FPDFDOC_InitFormFillEnvironment
- *                      Init form fill environment. 
+ *          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. 
+ *          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.
+ *          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.
+ *          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.
+ *          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.
+*           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. 
+*           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. 
+#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.
+*           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
+#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.
+*           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.
+ *          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.
+ *          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.
+ *          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);
 
 /**
  * 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.
+ *          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.
+ *          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.
+ *          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.
+ *          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_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.
 
 /**
  * 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.
+ *          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.
+ *          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.
+ *          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.
+ *          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.
+ *          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.
+ *          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);
-
+*           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);
 
 
 #ifdef __cplusplus
-};
+}
 #endif
 
-#endif //_FPDFORMFILL_H
-
+#endif  // PUBLIC_FPDF_FORMFILL_H_