XFA: Fix a crashier in SetFocus()

public/fpdf_formfill.h

Index: public/fpdf_formfill.h
diff --git a/public/fpdf_formfill.h b/public/fpdf_formfill.h
index b3bbb9280c0e4d82ee0cd120761c29b4d5e28f86..04f260a7e5aad36352eee6e332ae8accefc0768b 100644
--- a/public/fpdf_formfill.h
+++ b/public/fpdf_formfill.h
@@ -709,7 +709,7 @@ typedef struct _FPDF_FORMFILLINFO {
     * Method: FFI_DisplayCaret
     *           This method will show the caret at specified position.
     * Interface Version:
-    *           1
+    *           2

[Tom Sepez, 2016/01/29 16:47:11]

Thanks for correcting these comments.

     * Implementation Required:
     *           yes
     * Parameters:
@@ -739,7 +739,7 @@ typedef struct _FPDF_FORMFILLINFO {
   * Method: FFI_GetCurrentPageIndex
   *           This method will get the current page index.
   * Interface Version:
-  *           1
+  *           2
   * Implementation Required:
   *           yes
   * Parameters:
@@ -756,7 +756,7 @@ typedef struct _FPDF_FORMFILLINFO {
   * Method: FFI_SetCurrentPage
   *           This method will set the current page.
   * Interface Version:
-  *           1
+  *           2
   * Implementation Required:
   *           yes
   * Parameters:
@@ -775,7 +775,7 @@ typedef struct _FPDF_FORMFILLINFO {
   * Method: FFI_GotoURL
   *           This method will link to the specified URL.
   * Interface Version:
-  *           1
+  *           2
   * Implementation Required:
   *           no
   * Parameters:
@@ -794,7 +794,7 @@ typedef struct _FPDF_FORMFILLINFO {
   * Method: FFI_GetPageViewRect
   *           This method will get the current page view rectangle.
   * Interface Version:
-  *           1
+  *           2
   * Implementation Required:
   *           yes
   * Parameters:
@@ -822,7 +822,7 @@ typedef struct _FPDF_FORMFILLINFO {
   * Method: FFI_PopupMenu
   *           This method will track the right context menu for XFA fields.
   * Interface Version:
-  *           1
+  *           2
   * Implementation Required:
   *           yes
   * Parameters:
@@ -845,7 +845,7 @@ typedef struct _FPDF_FORMFILLINFO {
   * Method: FFI_OpenFile
   *           This method will open the specified file with the specified mode.
   * Interface Version
-  *           1
+  *           2
   * Implementation Required:
   *           yes
   * Parameters:
@@ -868,7 +868,7 @@ typedef struct _FPDF_FORMFILLINFO {
   *           This method will email the specified file stream to the specified
   *contacter.
   * Interface Version:
-  *           1
+  *           2
   * Implementation Required:
   *           yes
   * Parameters:
@@ -899,7 +899,7 @@ typedef struct _FPDF_FORMFILLINFO {
   *           This method will get upload the specified file stream to the
   *specified URL.
   * Interface Version:
-  *           1
+  *           2
   * Implementation Required:
   *           yes
   * Parameters:
@@ -920,7 +920,7 @@ typedef struct _FPDF_FORMFILLINFO {
   * Method: FFI_GetPlatform
   *           This method will get the current platform.
   * Interface Version:
-  *           1
+  *           2
   * Implementation Required:
   *           yes
   * Parameters:
@@ -940,7 +940,7 @@ typedef struct _FPDF_FORMFILLINFO {
   * Method: FFI_GetLanguage
   *           This method will get the current language.
   * Interface Version:
-  *           1
+  *           2
   * Implementation Required:
   *           yes
   * Parameters:
@@ -960,7 +960,7 @@ typedef struct _FPDF_FORMFILLINFO {
   * Method: FFI_DownloadFromURL
   *           This method will download the specified file from the URL.
   * Interface Version:
-  *           1
+  *           2
   * Implementation Required:
   *           yes
   * Parameters:
@@ -975,7 +975,7 @@ typedef struct _FPDF_FORMFILLINFO {
   * Method: FFI_PostRequestURL
   *           This method will post the request to the server URL.
   * Interface Version:
-  *           1
+  *           2
   * Implementation Required:
   *           yes
   * Parameters:
@@ -998,7 +998,7 @@ typedef struct _FPDF_FORMFILLINFO {
   * Method: FFI_PutRequestURL
   *           This method will put the request to the server URL.
   * Interface Version:
-  *           1
+  *           2
   * Implementation Required:
   *           yes
   * Parameters:
@@ -1011,6 +1011,29 @@ typedef struct _FPDF_FORMFILLINFO {
   *       TRUE indicates success, otherwise FALSE.
   **/
   FPDF_BOOL   (*FFI_PutRequestURL)(struct _FPDF_FORMFILLINFO* pThis, FPDF_WIDESTRING wsURL, FPDF_WIDESTRING wsData, FPDF_WIDESTRING wsEncode);
+
+  /**
+  * Method: FFI_PageEvent
+  *           This method will notify applications when a page is deleted or
+  *removed.
+  * Interface Version:
+  *           2
+  * Implementation Required:
+  *           yes
+  * Parameters:
+  *       pThis           -   Pointer to the interface structure itself.
+  *       iPageIndex      -   The index of which page is modified.
+  *       iEventType      -   Type of events. It can be one of
+  *the following marcos:
+  *                           1. FXFA_PAGEVIEWEVENT_POSTADDED
+  *                           2. FXFA_PAGEVIEWEVENT_POSTREMOVED
+  * Return value:
+  *       None.
+  **/
+  void (*FFI_PageEvent)(struct _FPDF_FORMFILLINFO* pThis,
+                        int iPageIndex,
+                        int iEventType);
+
 #endif  // PDF_ENABLE_XFA
 
 } FPDF_FORMFILLINFO;