ncurses 6.0 - patch 20170610
[ncurses.git] / form / frm_driver.c
index dfb6699ebdf3bb68e54cef11d1026d69acd27078..45e323f73b6cab87169e5d6e57a772aba83e2362 100644 (file)
@@ -1,5 +1,5 @@
 /****************************************************************************
- * Copyright (c) 1998-2006,2007 Free Software Foundation, Inc.              *
+ * Copyright (c) 1998-2016,2017 Free Software Foundation, Inc.              *
  *                                                                          *
  * Permission is hereby granted, free of charge, to any person obtaining a  *
  * copy of this software and associated documentation files (the            *
@@ -32,7 +32,7 @@
 
 #include "form.priv.h"
 
-MODULE_ID("$Id: frm_driver.c,v 1.79 2007/03/12 21:49:00 tom Exp $")
+MODULE_ID("$Id: frm_driver.c,v 1.121 2017/04/08 22:02:15 tom Exp $")
 
 /*----------------------------------------------------------------------------
   This is the core module of the form library. It contains the majority
@@ -172,29 +172,30 @@ static int FE_Delete_Previous(FORM *);
    instead of a derived window because it contains invisible parts.
    This is true for non-public fields and for scrollable fields. */
 #define Has_Invisible_Parts(field)     \
-  (!((field)->opts & O_PUBLIC)      || \
+  (!(Field_Has_Option(field, O_PUBLIC)) || \
    Is_Scroll_Field(field))
 
 /* Logic to decide whether or not a field needs justification */
 #define Justification_Allowed(field)        \
    (((field)->just != NO_JUSTIFICATION)  && \
     (Single_Line_Field(field))           && \
-    (((field)->dcols == (field)->cols)   && \
-    ((field)->opts & O_STATIC))             )
+    ((Field_Has_Option(field, O_STATIC)  && \
+     ((field)->dcols == (field)->cols))  || \
+    Field_Has_Option(field, O_DYNAMIC_JUSTIFY)))
 
 /* Logic to determine whether or not a dynamic field may still grow */
 #define Growable(field) ((field)->status & _MAY_GROW)
 
 /* Macro to set the attributes for a fields window */
 #define Set_Field_Window_Attributes(field,win) \
-(  wbkgdset((win),(chtype)((field)->pad | (field)->back)), \
-   wattrset((win),(field)->fore) )
+(  wbkgdset((win),(chtype)((chtype)((field)->pad) | (field)->back)), \
+   (void) wattrset((win), (int)(field)->fore) )
 
 /* Logic to decide whether or not a field really appears on the form */
 #define Field_Really_Appears(field)         \
   ((field->form)                          &&\
    (field->form->status & _POSTED)        &&\
-   (field->opts & O_VISIBLE)              &&\
+   (Field_Has_Option(field, O_VISIBLE))   &&\
    (field->page == field->form->curpage))
 
 /* Logic to determine whether or not we are on the first position in the
@@ -512,9 +513,10 @@ Buffer_To_Window(const FIELD *field, WINDOW *win)
 
 /*---------------------------------------------------------------------------
 |   Facility      :  libnform
-|   Function      :  static void Window_To_Buffer(
+|   Function      :  void _nc_get_fieldbuffer(
 |                                          WINDOW * win,
-|                                          FIELD  * field)
+|                                          FIELD  * field,
+|                                          FIELD_CELL * buf)
 |
 |   Description   :  Copy the content of the window into the buffer.
 |                    The multiple lines of a window are simply
@@ -523,18 +525,22 @@ Buffer_To_Window(const FIELD *field, WINDOW *win)
 |
 |   Return Values :  -
 +--------------------------------------------------------------------------*/
-static void
-Window_To_Buffer(WINDOW *win, FIELD *field)
+NCURSES_EXPORT(void)
+_nc_get_fieldbuffer(FORM *form, FIELD *field, FIELD_CELL *buf)
 {
   int pad;
   int len = 0;
   FIELD_CELL *p;
   int row, height;
+  WINDOW *win;
+
+  assert(form && field && buf);
 
-  assert(win && field && field->buf);
+  win = form->w;
+  assert(win);
 
   pad = field->pad;
-  p = field->buf;
+  p = buf;
   height = getmaxy(win);
 
   for (row = 0; (row < height) && (row < field->drows); row++)
@@ -561,6 +567,25 @@ Window_To_Buffer(WINDOW *win, FIELD *field)
     }
 }
 
+/*---------------------------------------------------------------------------
+|   Facility      :  libnform
+|   Function      :  static void Window_To_Buffer(
+|                                          FORM   * form,
+|                                          FIELD  * field)
+|
+|   Description   :  Copy the content of the window into the buffer.
+|                    The multiple lines of a window are simply
+|                    concatenated into the buffer. Pad characters in
+|                    the window will be replaced by blanks in the buffer.
+|
+|   Return Values :  -
++--------------------------------------------------------------------------*/
+static void
+Window_To_Buffer(FORM *form, FIELD *field)
+{
+  _nc_get_fieldbuffer(form, field, field->buf);
+}
+
 /*---------------------------------------------------------------------------
 |   Facility      :  libnform
 |   Function      :  static void Synchronize_Buffer(FORM * form)
@@ -577,9 +602,9 @@ Synchronize_Buffer(FORM *form)
 {
   if (form->status & _WINDOW_MODIFIED)
     {
-      form->status &= ~_WINDOW_MODIFIED;
-      form->status |= _FCHECK_REQUIRED;
-      Window_To_Buffer(form->w, form->current);
+      ClrStatus(form, _WINDOW_MODIFIED);
+      SetStatus(form, _FCHECK_REQUIRED);
+      Window_To_Buffer(form, form->current);
       wmove(form->w, form->currow, form->curcol);
     }
 }
@@ -629,7 +654,7 @@ Field_Grown(FIELD *field, int amount)
            growth = Minimum(field->maxgrow - field->dcols, growth);
          field->dcols += growth;
          if (field->dcols == field->maxgrow)
-           field->status &= ~_MAY_GROW;
+           ClrStatus(field, _MAY_GROW);
        }
       else
        {
@@ -638,7 +663,7 @@ Field_Grown(FIELD *field, int amount)
            growth = Minimum(field->maxgrow - field->drows, growth);
          field->drows += growth;
          if (field->drows == field->maxgrow)
-           field->status &= ~_MAY_GROW;
+           ClrStatus(field, _MAY_GROW);
        }
       /* drows, dcols changed, so we get really the new buffer length */
       new_buflen = Buffer_Length(field);
@@ -650,7 +675,7 @@ Field_Grown(FIELD *field, int amount)
          field->drows = old_drows;
          if ((single_line_field && (field->dcols != field->maxgrow)) ||
              (!single_line_field && (field->drows != field->maxgrow)))
-           field->status |= _MAY_GROW;
+           SetStatus(field, _MAY_GROW);
        }
       else
        {
@@ -663,7 +688,7 @@ Field_Grown(FIELD *field, int amount)
 
          result = TRUE;        /* allow sharing of recovery on failure */
 
-         T((T_CREATE("fieldcell %p"), newbuf));
+         T((T_CREATE("fieldcell %p"), (void *)newbuf));
          field->buf = newbuf;
          for (i = 0; i <= field->nbuf; i++)
            {
@@ -676,7 +701,7 @@ Field_Grown(FIELD *field, int amount)
              new_bp[new_buflen] = myZEROS;
            }
 
-#if USE_WIDEC_SUPPORT
+#if USE_WIDEC_SUPPORT && NCURSES_EXT_FUNCS
          if (wresize(field->working, 1, Buffer_Length(field) + 1) == ERR)
            result = FALSE;
 #endif
@@ -729,7 +754,7 @@ Field_Grown(FIELD *field, int amount)
                   (field->dcols != field->maxgrow)) ||
                  (!single_line_field &&
                   (field->drows != field->maxgrow)))
-               field->status |= _MAY_GROW;
+               SetStatus(field, _MAY_GROW);
              free(newbuf);
            }
        }
@@ -737,6 +762,34 @@ Field_Grown(FIELD *field, int amount)
   return (result);
 }
 
+#ifdef NCURSES_MOUSE_VERSION
+/*---------------------------------------------------------------------------
+|   Facility      :  libnform
+|   Function      :  int Field_encloses(FIELD *field, int ry, int rx)
+|
+|   Description   :  Check if the given coordinates lie within the given field.
+|
+|   Return Values :  E_OK              - success
+|                    E_BAD_ARGUMENT    - invalid form pointer
+|                    E_SYSTEM_ERROR    - form has no current field or
+|                                        field-window
++--------------------------------------------------------------------------*/
+static int
+Field_encloses(FIELD *field, int ry, int rx)
+{
+  T((T_CALLED("Field_encloses(%p)"), (void *)field));
+  if (field != 0
+      && field->frow <= ry
+      && (field->frow + field->rows) > ry
+      && field->fcol <= rx
+      && (field->fcol + field->cols) > rx)
+    {
+      RETURN(E_OK);
+    }
+  RETURN(E_INVALID_FIELD);
+}
+#endif
+
 /*---------------------------------------------------------------------------
 |   Facility      :  libnform
 |   Function      :  int _nc_Position_Form_Cursor(FORM * form)
@@ -797,7 +850,7 @@ _nc_Refresh_Current_Field(FORM *form)
   WINDOW *formwin;
   FIELD *field;
 
-  T((T_CALLED("_nc_Refresh_Current_Field(%p)"), form));
+  T((T_CALLED("_nc_Refresh_Current_Field(%p)"), (void *)form));
 
   if (!form)
     RETURN(E_BAD_ARGUMENT);
@@ -808,7 +861,7 @@ _nc_Refresh_Current_Field(FORM *form)
   field = form->current;
   formwin = Get_Form_Window(form);
 
-  if (field->opts & O_PUBLIC)
+  if (Field_Has_Option(field, O_PUBLIC))
     {
       if (Is_Scroll_Field(field))
        {
@@ -845,19 +898,19 @@ _nc_Refresh_Current_Field(FORM *form)
                  if (form->currow < form->toprow)
                    {
                      form->toprow = form->currow;
-                     field->status |= _NEWTOP;
+                     SetStatus(field, _NEWTOP);
                    }
                  if (form->currow >= row_after_bottom)
                    {
                      form->toprow = form->currow - field->rows + 1;
-                     field->status |= _NEWTOP;
+                     SetStatus(field, _NEWTOP);
                    }
                  if (field->status & _NEWTOP)
                    {
                      /* means we have to copy whole range */
                      first_modified_row = form->toprow;
                      first_unmodified_row = first_modified_row + field->rows;
-                     field->status &= ~_NEWTOP;
+                     ClrStatus(field, _NEWTOP);
                    }
                  else
                    {
@@ -926,26 +979,29 @@ Perform_Justification(FIELD *field, WINDOW *win)
   int len;
   int col = 0;
 
-  bp = Get_Start_Of_Data(field->buf, Buffer_Length(field));
+  bp = (Field_Has_Option(field, O_NO_LEFT_STRIP)
+       ? field->buf
+       : Get_Start_Of_Data(field->buf, Buffer_Length(field)));
   len = (int)(After_End_Of_Data(field->buf, Buffer_Length(field)) - bp);
 
   if (len > 0)
     {
-      assert(win && (field->drows == 1) && (field->dcols == field->cols));
+      assert(win && (field->drows == 1));
 
-      switch (field->just)
-       {
-       case JUSTIFY_LEFT:
-         break;
-       case JUSTIFY_CENTER:
-         col = (field->cols - len) / 2;
-         break;
-       case JUSTIFY_RIGHT:
-         col = field->cols - len;
-         break;
-       default:
-         break;
-       }
+      if (field->cols - len >= 0)
+       switch (field->just)
+         {
+         case JUSTIFY_LEFT:
+           break;
+         case JUSTIFY_CENTER:
+           col = (field->cols - len) / 2;
+           break;
+         case JUSTIFY_RIGHT:
+           col = field->cols - len;
+           break;
+         default:
+           break;
+         }
 
       wmove(win, 0, col);
       myADDNSTR(win, bp, len);
@@ -969,7 +1025,9 @@ Undo_Justification(FIELD *field, WINDOW *win)
   FIELD_CELL *bp;
   int len;
 
-  bp = Get_Start_Of_Data(field->buf, Buffer_Length(field));
+  bp = (Field_Has_Option(field, O_NO_LEFT_STRIP)
+       ? field->buf
+       : Get_Start_Of_Data(field->buf, Buffer_Length(field)));
   len = (int)(After_End_Of_Data(field->buf, Buffer_Length(field)) - bp);
 
   if (len > 0)
@@ -982,7 +1040,8 @@ Undo_Justification(FIELD *field, WINDOW *win)
 
 /*---------------------------------------------------------------------------
 |   Facility      :  libnform
-|   Function      :  static bool Check_Char(
+|   Function      :  static bool Check_Char(FORM  *form,
+|                                           FIELD *field,
 |                                           FIELDTYPE * typ,
 |                                           int ch,
 |                                           TypeArgument *argp)
@@ -994,7 +1053,11 @@ Undo_Justification(FIELD *field, WINDOW *win)
 |                    FALSE            - Character is invalid
 +--------------------------------------------------------------------------*/
 static bool
-Check_Char(FIELDTYPE *typ, int ch, TypeArgument *argp)
+Check_Char(FORM *form,
+          FIELD *field,
+          FIELDTYPE *typ,
+          int ch,
+          TypeArgument *argp)
 {
   if (typ)
     {
@@ -1002,13 +1065,23 @@ Check_Char(FIELDTYPE *typ, int ch, TypeArgument *argp)
        {
          assert(argp);
          return (
-                  Check_Char(typ->left, ch, argp->left) ||
-                  Check_Char(typ->right, ch, argp->right));
+                  Check_Char(form, field, typ->left, ch, argp->left) ||
+                  Check_Char(form, field, typ->right, ch, argp->right));
        }
       else
        {
+#if NCURSES_INTEROP_FUNCS
+         if (typ->charcheck.occheck)
+           {
+             if (typ->status & _GENERIC)
+               return typ->charcheck.gccheck(ch, form, field, (void *)argp);
+             else
+               return typ->charcheck.occheck(ch, (void *)argp);
+           }
+#else
          if (typ->ccheck)
            return typ->ccheck(ch, (void *)argp);
+#endif
        }
     }
   return (!iscntrl(UChar(ch)) ? TRUE : FALSE);
@@ -1044,23 +1117,27 @@ Display_Or_Erase_Field(FIELD *field, bool bEraseFlag)
     return E_SYSTEM_ERROR;
   else
     {
-      if (field->opts & O_VISIBLE)
-       Set_Field_Window_Attributes(field, win);
+      if (Field_Has_Option(field, O_VISIBLE))
+       {
+         Set_Field_Window_Attributes(field, win);
+       }
       else
-       wattrset(win, WINDOW_ATTRS(fwin));
+       {
+         (void)wattrset(win, (int)WINDOW_ATTRS(fwin));
+       }
       werase(win);
     }
 
   if (!bEraseFlag)
     {
-      if (field->opts & O_PUBLIC)
+      if (Field_Has_Option(field, O_PUBLIC))
        {
          if (Justification_Allowed(field))
            Perform_Justification(field, win);
          else
            Buffer_To_Window(field, win);
        }
-      field->status &= ~_NEWTOP;
+      ClrStatus(field, _NEWTOP);
     }
   wsyncup(win);
   delwin(win);
@@ -1099,18 +1176,18 @@ Synchronize_Field(FIELD *field)
          form->currow = form->curcol = form->toprow = form->begincol = 0;
          werase(form->w);
 
-         if ((field->opts & O_PUBLIC) && Justification_Allowed(field))
+         if ((Field_Has_Option(field, O_PUBLIC)) && Justification_Allowed(field))
            Undo_Justification(field, form->w);
          else
            Buffer_To_Window(field, form->w);
 
-         field->status |= _NEWTOP;
+         SetStatus(field, _NEWTOP);
          res = _nc_Refresh_Current_Field(form);
        }
       else
        res = Display_Field(field);
     }
-  field->status |= _CHANGED;
+  SetStatus(field, _CHANGED);
   return (res);
 }
 
@@ -1140,7 +1217,7 @@ Synchronize_Linked_Fields(FIELD *field)
     return (E_SYSTEM_ERROR);
 
   for (linked_field = field->link;
-       linked_field != field;
+       (linked_field != field) && (linked_field != 0);
        linked_field = linked_field->link)
     {
       if (((syncres = Synchronize_Field(linked_field)) != E_OK) &&
@@ -1169,7 +1246,7 @@ _nc_Synchronize_Attributes(FIELD *field)
   int res = E_OK;
   WINDOW *formwin;
 
-  T((T_CALLED("_nc_Synchronize_Attributes(%p)"), field));
+  T((T_CALLED("_nc_Synchronize_Attributes(%p)"), (void *)field));
 
   if (!field)
     returnCode(E_BAD_ARGUMENT);
@@ -1185,7 +1262,7 @@ _nc_Synchronize_Attributes(FIELD *field)
          werase(form->w);
          wmove(form->w, form->currow, form->curcol);
 
-         if (field->opts & O_PUBLIC)
+         if (Field_Has_Option(field, O_PUBLIC))
            {
              if (Justification_Allowed(field))
                Undo_Justification(field, form->w);
@@ -1198,10 +1275,11 @@ _nc_Synchronize_Attributes(FIELD *field)
              copywin(form->w, formwin,
                      0, 0,
                      field->frow, field->fcol,
-                     field->rows - 1, field->cols - 1, 0);
+                     field->frow + field->rows - 1,
+                     field->fcol + field->cols - 1, 0);
              wsyncup(formwin);
              Buffer_To_Window(field, form->w);
-             field->status |= _NEWTOP;         /* fake refresh to paint all */
+             SetStatus(field, _NEWTOP);        /* fake refresh to paint all */
              _nc_Refresh_Current_Field(form);
            }
        }
@@ -1236,7 +1314,7 @@ _nc_Synchronize_Options(FIELD *field, Field_Options newopts)
   FORM *form;
   int res = E_OK;
 
-  T((T_CALLED("_nc_Synchronize_Options(%p,%#x)"), field, newopts));
+  T((T_CALLED("_nc_Synchronize_Options(%p,%#x)"), (void *)field, newopts));
 
   if (!field)
     returnCode(E_BAD_ARGUMENT);
@@ -1248,42 +1326,41 @@ _nc_Synchronize_Options(FIELD *field, Field_Options newopts)
 
   if (form)
     {
-      if (form->current == field)
-       {
-         field->opts = oldopts;
-         returnCode(E_CURRENT);
-       }
-
       if (form->status & _POSTED)
        {
-         if ((form->curpage == field->page))
+         if (form->current == field)
            {
-             if (changed_opts & O_VISIBLE)
+             field->opts = oldopts;
+             returnCode(E_CURRENT);
+           }
+         if (form->curpage == field->page)
+           {
+             if ((unsigned)changed_opts & O_VISIBLE)
                {
-                 if (newopts & O_VISIBLE)
+                 if ((unsigned)newopts & O_VISIBLE)
                    res = Display_Field(field);
                  else
                    res = Erase_Field(field);
                }
              else
                {
-                 if ((changed_opts & O_PUBLIC) &&
-                     (newopts & O_VISIBLE))
+                 if (((unsigned)changed_opts & O_PUBLIC) &&
+                     ((unsigned)newopts & O_VISIBLE))
                    res = Display_Field(field);
                }
            }
        }
     }
 
-  if (changed_opts & O_STATIC)
+  if ((unsigned)changed_opts & O_STATIC)
     {
       bool single_line_field = Single_Line_Field(field);
       int res2 = E_OK;
 
-      if (newopts & O_STATIC)
+      if ((unsigned)newopts & O_STATIC)
        {
          /* the field becomes now static */
-         field->status &= ~_MAY_GROW;
+         ClrStatus(field, _MAY_GROW);
          /* if actually we have no hidden columns, justification may
             occur again */
          if (single_line_field &&
@@ -1301,7 +1378,7 @@ _nc_Synchronize_Options(FIELD *field, Field_Options newopts)
              (single_line_field && (field->dcols < field->maxgrow)) ||
              (!single_line_field && (field->drows < field->maxgrow)))
            {
-             field->status |= _MAY_GROW;
+             SetStatus(field, _MAY_GROW);
              /* a field with justification now changes its behavior,
                 so we must redisplay it */
              if (single_line_field &&
@@ -1319,6 +1396,57 @@ _nc_Synchronize_Options(FIELD *field, Field_Options newopts)
   returnCode(res);
 }
 
+/*
+ * Removes the focus from the current field of the form.
+ */
+void
+_nc_Unset_Current_Field(FORM *form)
+{
+  FIELD *field = form->current;
+
+  _nc_Refresh_Current_Field(form);
+  if (Field_Has_Option(field, O_PUBLIC))
+    {
+      if (field->drows > field->rows)
+       {
+         if (form->toprow == 0)
+           ClrStatus(field, _NEWTOP);
+         else
+           SetStatus(field, _NEWTOP);
+       }
+      else
+       {
+         if (Justification_Allowed(field))
+           {
+             Window_To_Buffer(form, field);
+             werase(form->w);
+             Perform_Justification(field, form->w);
+             if (Field_Has_Option(field, O_DYNAMIC_JUSTIFY) &&
+                 (form->w->_parent == 0))
+               {
+                 copywin(form->w,
+                         Get_Form_Window(form),
+                         0,
+                         0,
+                         field->frow,
+                         field->fcol,
+                         field->frow,
+                         field->cols + field->fcol - 1,
+                         0);
+                 wsyncup(Get_Form_Window(form));
+               }
+             else
+               {
+                 wsyncup(form->w);
+               }
+           }
+       }
+    }
+  delwin(form->w);
+  form->w = (WINDOW *)0;
+  form->current = 0;
+}
+
 /*---------------------------------------------------------------------------
 |   Facility      :  libnform
 |   Function      :  int _nc_Set_Current_Field(FORM  * form,
@@ -1337,9 +1465,9 @@ _nc_Set_Current_Field(FORM *form, FIELD *newfield)
   FIELD *field;
   WINDOW *new_window;
 
-  T((T_CALLED("_nc_Set_Current_Field(%p,%p)"), form, newfield));
+  T((T_CALLED("_nc_Set_Current_Field(%p,%p)"), (void *)form, (void *)newfield));
 
-  if (!form || !newfield || !form->current || (newfield->form != form))
+  if (!form || !newfield || (newfield->form != form))
     returnCode(E_BAD_ARGUMENT);
 
   if ((form->status & _IN_DRIVER))
@@ -1353,34 +1481,10 @@ _nc_Set_Current_Field(FORM *form, FIELD *newfield)
   if ((field != newfield) ||
       !(form->status & _POSTED))
     {
-      if ((form->w) &&
-         (field->opts & O_VISIBLE) &&
+      if (field && (form->w) &&
+         (Field_Has_Option(field, O_VISIBLE)) &&
          (field->form->curpage == field->page))
-       {
-         _nc_Refresh_Current_Field(form);
-         if (field->opts & O_PUBLIC)
-           {
-             if (field->drows > field->rows)
-               {
-                 if (form->toprow == 0)
-                   field->status &= ~_NEWTOP;
-                 else
-                   field->status |= _NEWTOP;
-               }
-             else
-               {
-                 if (Justification_Allowed(field))
-                   {
-                     Window_To_Buffer(form->w, field);
-                     werase(form->w);
-                     Perform_Justification(field, form->w);
-                     wsyncup(form->w);
-                   }
-               }
-           }
-         delwin(form->w);
-         form->w = (WINDOW *)0;
-       }
+       _nc_Unset_Current_Field(form);
 
       field = newfield;
 
@@ -1399,7 +1503,7 @@ _nc_Set_Current_Field(FORM *form, FIELD *newfield)
        delwin(form->w);
       form->w = new_window;
 
-      form->status &= ~_WINDOW_MODIFIED;
+      ClrStatus(form, _WINDOW_MODIFIED);
       Set_Field_Window_Attributes(field, form->w);
 
       if (Has_Invisible_Parts(field))
@@ -1444,7 +1548,7 @@ IFN_Next_Character(FORM *form)
   FIELD *field = form->current;
   int step = myWCWIDTH(form->w, form->currow, form->curcol);
 
-  T((T_CALLED("IFN_Next_Character(%p)"), form));
+  T((T_CALLED("IFN_Next_Character(%p)"), (void *)form));
   if ((form->curcol += step) == field->dcols)
     {
       if ((++(form->currow)) == field->drows)
@@ -1486,7 +1590,7 @@ IFN_Previous_Character(FORM *form)
   int amount = myWCWIDTH(form->w, form->currow, form->curcol - 1);
   int oldcol = form->curcol;
 
-  T((T_CALLED("IFN_Previous_Character(%p)"), form));
+  T((T_CALLED("IFN_Previous_Character(%p)"), (void *)form));
   if ((form->curcol -= amount) < 0)
     {
       if ((--(form->currow)) < 0)
@@ -1514,7 +1618,7 @@ IFN_Next_Line(FORM *form)
 {
   FIELD *field = form->current;
 
-  T((T_CALLED("IFN_Next_Line(%p)"), form));
+  T((T_CALLED("IFN_Next_Line(%p)"), (void *)form));
   if ((++(form->currow)) == field->drows)
     {
 #if GROW_IF_NAVIGATE
@@ -1540,7 +1644,7 @@ IFN_Next_Line(FORM *form)
 static int
 IFN_Previous_Line(FORM *form)
 {
-  T((T_CALLED("IFN_Previous_Line(%p)"), form));
+  T((T_CALLED("IFN_Previous_Line(%p)"), (void *)form));
   if ((--(form->currow)) < 0)
     {
       form->currow++;
@@ -1567,7 +1671,7 @@ IFN_Next_Word(FORM *form)
   FIELD_CELL *s;
   FIELD_CELL *t;
 
-  T((T_CALLED("IFN_Next_Word(%p)"), form));
+  T((T_CALLED("IFN_Next_Word(%p)"), (void *)form));
 
   /* We really need access to the data, so we have to synchronize */
   Synchronize_Buffer(form);
@@ -1610,7 +1714,7 @@ IFN_Previous_Word(FORM *form)
   FIELD_CELL *t;
   bool again = FALSE;
 
-  T((T_CALLED("IFN_Previous_Word(%p)"), form));
+  T((T_CALLED("IFN_Previous_Word(%p)"), (void *)form));
 
   /* We really need access to the data, so we have to synchronize */
   Synchronize_Buffer(form);
@@ -1660,7 +1764,7 @@ IFN_Beginning_Of_Field(FORM *form)
 {
   FIELD *field = form->current;
 
-  T((T_CALLED("IFN_Beginning_Of_Field(%p)"), form));
+  T((T_CALLED("IFN_Beginning_Of_Field(%p)"), (void *)form));
   Synchronize_Buffer(form);
   Adjust_Cursor_Position(form,
                         Get_Start_Of_Data(field->buf, Buffer_Length(field)));
@@ -1684,7 +1788,7 @@ IFN_End_Of_Field(FORM *form)
   FIELD *field = form->current;
   FIELD_CELL *pos;
 
-  T((T_CALLED("IFN_End_Of_Field(%p)"), form));
+  T((T_CALLED("IFN_End_Of_Field(%p)"), (void *)form));
   Synchronize_Buffer(form);
   pos = After_End_Of_Data(field->buf, Buffer_Length(field));
   if (pos == (field->buf + Buffer_Length(field)))
@@ -1707,7 +1811,7 @@ IFN_Beginning_Of_Line(FORM *form)
 {
   FIELD *field = form->current;
 
-  T((T_CALLED("IFN_Beginning_Of_Line(%p)"), form));
+  T((T_CALLED("IFN_Beginning_Of_Line(%p)"), (void *)form));
   Synchronize_Buffer(form);
   Adjust_Cursor_Position(form,
                         Get_Start_Of_Data(Address_Of_Current_Row_In_Buffer(form),
@@ -1733,7 +1837,7 @@ IFN_End_Of_Line(FORM *form)
   FIELD_CELL *pos;
   FIELD_CELL *bp;
 
-  T((T_CALLED("IFN_End_Of_Line(%p)"), form));
+  T((T_CALLED("IFN_End_Of_Line(%p)"), (void *)form));
   Synchronize_Buffer(form);
   bp = Address_Of_Current_Row_In_Buffer(form);
   pos = After_End_Of_Data(bp, field->dcols);
@@ -1759,7 +1863,7 @@ IFN_Left_Character(FORM *form)
   int amount = myWCWIDTH(form->w, form->currow, form->curcol - 1);
   int oldcol = form->curcol;
 
-  T((T_CALLED("IFN_Left_Character(%p)"), form));
+  T((T_CALLED("IFN_Left_Character(%p)"), (void *)form));
   if ((form->curcol -= amount) < 0)
     {
       form->curcol = oldcol;
@@ -1784,7 +1888,7 @@ IFN_Right_Character(FORM *form)
   int amount = myWCWIDTH(form->w, form->currow, form->curcol);
   int oldcol = form->curcol;
 
-  T((T_CALLED("IFN_Right_Character(%p)"), form));
+  T((T_CALLED("IFN_Right_Character(%p)"), (void *)form));
   if ((form->curcol += amount) >= form->current->dcols)
     {
 #if GROW_IF_NAVIGATE
@@ -1812,7 +1916,7 @@ IFN_Right_Character(FORM *form)
 static int
 IFN_Up_Character(FORM *form)
 {
-  T((T_CALLED("IFN_Up_Character(%p)"), form));
+  T((T_CALLED("IFN_Up_Character(%p)"), (void *)form));
   if ((--(form->currow)) < 0)
     {
       form->currow++;
@@ -1836,7 +1940,7 @@ IFN_Down_Character(FORM *form)
 {
   FIELD *field = form->current;
 
-  T((T_CALLED("IFN_Down_Character(%p)"), form));
+  T((T_CALLED("IFN_Down_Character(%p)"), (void *)form));
   if ((++(form->currow)) == field->drows)
     {
 #if GROW_IF_NAVIGATE
@@ -1928,7 +2032,7 @@ Vertical_Scrolling(int (*const fct) (FORM *), FORM *form)
     {
       res = fct(form);
       if (res == E_OK)
-       form->current->status |= _NEWTOP;
+       SetStatus(form->current, _NEWTOP);
     }
   return (res);
 }
@@ -1945,7 +2049,7 @@ Vertical_Scrolling(int (*const fct) (FORM *), FORM *form)
 static int
 VSC_Scroll_Line_Forward(FORM *form)
 {
-  T((T_CALLED("VSC_Scroll_Line_Forward(%p)"), form));
+  T((T_CALLED("VSC_Scroll_Line_Forward(%p)"), (void *)form));
   returnCode(VSC_Generic(form, 1));
 }
 
@@ -1961,7 +2065,7 @@ VSC_Scroll_Line_Forward(FORM *form)
 static int
 VSC_Scroll_Line_Backward(FORM *form)
 {
-  T((T_CALLED("VSC_Scroll_Line_Backward(%p)"), form));
+  T((T_CALLED("VSC_Scroll_Line_Backward(%p)"), (void *)form));
   returnCode(VSC_Generic(form, -1));
 }
 
@@ -1977,7 +2081,7 @@ VSC_Scroll_Line_Backward(FORM *form)
 static int
 VSC_Scroll_Page_Forward(FORM *form)
 {
-  T((T_CALLED("VSC_Scroll_Page_Forward(%p)"), form));
+  T((T_CALLED("VSC_Scroll_Page_Forward(%p)"), (void *)form));
   returnCode(VSC_Generic(form, form->current->rows));
 }
 
@@ -1993,7 +2097,7 @@ VSC_Scroll_Page_Forward(FORM *form)
 static int
 VSC_Scroll_Half_Page_Forward(FORM *form)
 {
-  T((T_CALLED("VSC_Scroll_Half_Page_Forward(%p)"), form));
+  T((T_CALLED("VSC_Scroll_Half_Page_Forward(%p)"), (void *)form));
   returnCode(VSC_Generic(form, (form->current->rows + 1) / 2));
 }
 
@@ -2009,7 +2113,7 @@ VSC_Scroll_Half_Page_Forward(FORM *form)
 static int
 VSC_Scroll_Page_Backward(FORM *form)
 {
-  T((T_CALLED("VSC_Scroll_Page_Backward(%p)"), form));
+  T((T_CALLED("VSC_Scroll_Page_Backward(%p)"), (void *)form));
   returnCode(VSC_Generic(form, -(form->current->rows)));
 }
 
@@ -2025,7 +2129,7 @@ VSC_Scroll_Page_Backward(FORM *form)
 static int
 VSC_Scroll_Half_Page_Backward(FORM *form)
 {
-  T((T_CALLED("VSC_Scroll_Half_Page_Backward(%p)"), form));
+  T((T_CALLED("VSC_Scroll_Half_Page_Backward(%p)"), (void *)form));
   returnCode(VSC_Generic(form, -((form->current->rows + 1) / 2)));
 }
 /*----------------------------------------------------------------------------
@@ -2119,7 +2223,7 @@ Horizontal_Scrolling(int (*const fct) (FORM *), FORM *form)
 static int
 HSC_Scroll_Char_Forward(FORM *form)
 {
-  T((T_CALLED("HSC_Scroll_Char_Forward(%p)"), form));
+  T((T_CALLED("HSC_Scroll_Char_Forward(%p)"), (void *)form));
   returnCode(HSC_Generic(form, 1));
 }
 
@@ -2135,7 +2239,7 @@ HSC_Scroll_Char_Forward(FORM *form)
 static int
 HSC_Scroll_Char_Backward(FORM *form)
 {
-  T((T_CALLED("HSC_Scroll_Char_Backward(%p)"), form));
+  T((T_CALLED("HSC_Scroll_Char_Backward(%p)"), (void *)form));
   returnCode(HSC_Generic(form, -1));
 }
 
@@ -2151,7 +2255,7 @@ HSC_Scroll_Char_Backward(FORM *form)
 static int
 HSC_Horizontal_Line_Forward(FORM *form)
 {
-  T((T_CALLED("HSC_Horizontal_Line_Forward(%p)"), form));
+  T((T_CALLED("HSC_Horizontal_Line_Forward(%p)"), (void *)form));
   returnCode(HSC_Generic(form, form->current->cols));
 }
 
@@ -2167,7 +2271,7 @@ HSC_Horizontal_Line_Forward(FORM *form)
 static int
 HSC_Horizontal_Half_Line_Forward(FORM *form)
 {
-  T((T_CALLED("HSC_Horizontal_Half_Line_Forward(%p)"), form));
+  T((T_CALLED("HSC_Horizontal_Half_Line_Forward(%p)"), (void *)form));
   returnCode(HSC_Generic(form, (form->current->cols + 1) / 2));
 }
 
@@ -2183,7 +2287,7 @@ HSC_Horizontal_Half_Line_Forward(FORM *form)
 static int
 HSC_Horizontal_Line_Backward(FORM *form)
 {
-  T((T_CALLED("HSC_Horizontal_Line_Backward(%p)"), form));
+  T((T_CALLED("HSC_Horizontal_Line_Backward(%p)"), (void *)form));
   returnCode(HSC_Generic(form, -(form->current->cols)));
 }
 
@@ -2199,7 +2303,7 @@ HSC_Horizontal_Line_Backward(FORM *form)
 static int
 HSC_Horizontal_Half_Line_Backward(FORM *form)
 {
-  T((T_CALLED("HSC_Horizontal_Half_Line_Backward(%p)"), form));
+  T((T_CALLED("HSC_Horizontal_Half_Line_Backward(%p)"), (void *)form));
   returnCode(HSC_Generic(form, -((form->current->cols + 1) / 2)));
 }
 
@@ -2360,7 +2464,7 @@ Wrapping_Not_Necessary_Or_Wrapping_Ok(FORM *form)
   int result = E_REQUEST_DENIED;
   bool Last_Row = ((field->drows - 1) == form->currow);
 
-  if ((field->opts & O_WRAP) &&        /* wrapping wanted     */
+  if ((Field_Has_Option(field, O_WRAP)) &&     /* wrapping wanted     */
       (!Single_Line_Field(field)) &&   /* must be multi-line  */
       (There_Is_No_Room_For_A_Char_In_Line(form)) &&   /* line is full        */
       (!Last_Row || Growable(field)))  /* there are more lines */
@@ -2378,7 +2482,7 @@ Wrapping_Not_Necessary_Or_Wrapping_Ok(FORM *form)
            return E_SYSTEM_ERROR;
        }
       bp = Address_Of_Current_Row_In_Buffer(form);
-      Window_To_Buffer(form->w, field);
+      Window_To_Buffer(form, field);
       split = After_Last_Whitespace_Character(bp, field->dcols);
       /* split points to the first character of the sequence to be brought
          on the next line */
@@ -2404,7 +2508,7 @@ Wrapping_Not_Necessary_Or_Wrapping_Ok(FORM *form)
       if (result != E_OK)
        {
          DeleteChar(form);
-         Window_To_Buffer(form->w, field);
+         Window_To_Buffer(form, field);
          result = E_REQUEST_DENIED;
        }
     }
@@ -2443,7 +2547,7 @@ Field_Editing(int (*const fct) (FORM *), FORM *form)
      editable fields.
    */
   if ((fct == FE_Delete_Previous) &&
-      (form->opts & O_BS_OVERLOAD) &&
+      ((unsigned)form->opts & O_BS_OVERLOAD) &&
       First_Position_In_Current_Field(form))
     {
       res = Inter_Field_Navigation(FN_Previous_Field, form);
@@ -2452,7 +2556,7 @@ Field_Editing(int (*const fct) (FORM *), FORM *form)
     {
       if (fct == FE_New_Line)
        {
-         if ((form->opts & O_NL_OVERLOAD) &&
+         if (((unsigned)form->opts & O_NL_OVERLOAD) &&
              First_Position_In_Current_Field(form))
            {
              res = Inter_Field_Navigation(FN_Next_Field, form);
@@ -2464,11 +2568,11 @@ Field_Editing(int (*const fct) (FORM *), FORM *form)
       else
        {
          /* From now on, everything must be editable */
-         if (form->current->opts & O_EDIT)
+         if ((unsigned)form->current->opts & O_EDIT)
            {
              res = fct(form);
              if (res == E_OK)
-               form->status |= _WINDOW_MODIFIED;
+               SetStatus(form, _WINDOW_MODIFIED);
            }
        }
     }
@@ -2495,13 +2599,13 @@ FE_New_Line(FORM *form)
   FIELD_CELL *bp, *t;
   bool Last_Row = ((field->drows - 1) == form->currow);
 
-  T((T_CALLED("FE_New_Line(%p)"), form));
+  T((T_CALLED("FE_New_Line(%p)"), (void *)form));
   if (form->status & _OVLMODE)
     {
       if (Last_Row &&
          (!(Growable(field) && !Single_Line_Field(field))))
        {
-         if (!(form->opts & O_NL_OVERLOAD))
+         if (!((unsigned)form->opts & O_NL_OVERLOAD))
            returnCode(E_REQUEST_DENIED);
          wmove(form->w, form->currow, form->curcol);
          wclrtoeol(form->w);
@@ -2509,7 +2613,7 @@ FE_New_Line(FORM *form)
             handled in the generic routine. The reason is,
             that FN_Next_Field may fail, but the form is
             definitively changed */
-         form->status |= _WINDOW_MODIFIED;
+         SetStatus(form, _WINDOW_MODIFIED);
          returnCode(Inter_Field_Navigation(FN_Next_Field, form));
        }
       else
@@ -2525,7 +2629,7 @@ FE_New_Line(FORM *form)
          wclrtoeol(form->w);
          form->currow++;
          form->curcol = 0;
-         form->status |= _WINDOW_MODIFIED;
+         SetStatus(form, _WINDOW_MODIFIED);
          returnCode(E_OK);
        }
     }
@@ -2535,7 +2639,7 @@ FE_New_Line(FORM *form)
       if (Last_Row &&
          !(Growable(field) && !Single_Line_Field(field)))
        {
-         if (!(form->opts & O_NL_OVERLOAD))
+         if (!((unsigned)form->opts & O_NL_OVERLOAD))
            returnCode(E_REQUEST_DENIED);
          returnCode(Inter_Field_Navigation(FN_Next_Field, form));
        }
@@ -2557,7 +2661,7 @@ FE_New_Line(FORM *form)
          wmove(form->w, form->currow, form->curcol);
          winsertln(form->w);
          myADDNSTR(form->w, bp, (int)(t - bp));
-         form->status |= _WINDOW_MODIFIED;
+         SetStatus(form, _WINDOW_MODIFIED);
          returnCode(E_OK);
        }
     }
@@ -2578,8 +2682,9 @@ FE_Insert_Character(FORM *form)
   FIELD *field = form->current;
   int result = E_REQUEST_DENIED;
 
-  T((T_CALLED("FE_Insert_Character(%p)"), form));
-  if (Check_Char(field->type, (int)C_BLANK, (TypeArgument *)(field->arg)))
+  T((T_CALLED("FE_Insert_Character(%p)"), (void *)form));
+  if (Check_Char(form, field, field->type, (int)C_BLANK,
+                (TypeArgument *)(field->arg)))
     {
       bool There_Is_Room = Is_There_Room_For_A_Char_In_Line(form);
 
@@ -2613,8 +2718,9 @@ FE_Insert_Line(FORM *form)
   FIELD *field = form->current;
   int result = E_REQUEST_DENIED;
 
-  T((T_CALLED("FE_Insert_Line(%p)"), form));
-  if (Check_Char(field->type, (int)C_BLANK, (TypeArgument *)(field->arg)))
+  T((T_CALLED("FE_Insert_Line(%p)"), (void *)form));
+  if (Check_Char(form, field,
+                field->type, (int)C_BLANK, (TypeArgument *)(field->arg)))
     {
       bool Maybe_Done = (form->currow != (field->drows - 1)) &&
       Is_There_Room_For_A_Line(form);
@@ -2646,7 +2752,7 @@ FE_Insert_Line(FORM *form)
 static int
 FE_Delete_Character(FORM *form)
 {
-  T((T_CALLED("FE_Delete_Character(%p)"), form));
+  T((T_CALLED("FE_Delete_Character(%p)"), (void *)form));
   DeleteChar(form);
   returnCode(E_OK);
 }
@@ -2669,7 +2775,7 @@ FE_Delete_Previous(FORM *form)
 {
   FIELD *field = form->current;
 
-  T((T_CALLED("FE_Delete_Previous(%p)"), form));
+  T((T_CALLED("FE_Delete_Previous(%p)"), (void *)form));
   if (First_Position_In_Current_Field(form))
     returnCode(E_REQUEST_DENIED);
 
@@ -2737,7 +2843,7 @@ FE_Delete_Previous(FORM *form)
 static int
 FE_Delete_Line(FORM *form)
 {
-  T((T_CALLED("FE_Delete_Line(%p)"), form));
+  T((T_CALLED("FE_Delete_Line(%p)"), (void *)form));
   form->curcol = 0;
   wdeleteln(form->w);
   returnCode(E_OK);
@@ -2761,7 +2867,7 @@ FE_Delete_Word(FORM *form)
   FIELD_CELL *cp = bp + form->curcol;
   FIELD_CELL *s;
 
-  T((T_CALLED("FE_Delete_Word(%p)"), form));
+  T((T_CALLED("FE_Delete_Word(%p)"), (void *)form));
   Synchronize_Buffer(form);
   if (ISBLANK(*cp))
     returnCode(E_REQUEST_DENIED);      /* not in word */
@@ -2795,7 +2901,7 @@ FE_Delete_Word(FORM *form)
 static int
 FE_Clear_To_End_Of_Line(FORM *form)
 {
-  T((T_CALLED("FE_Clear_To_End_Of_Line(%p)"), form));
+  T((T_CALLED("FE_Clear_To_End_Of_Line(%p)"), (void *)form));
   wmove(form->w, form->currow, form->curcol);
   wclrtoeol(form->w);
   returnCode(E_OK);
@@ -2812,7 +2918,7 @@ FE_Clear_To_End_Of_Line(FORM *form)
 static int
 FE_Clear_To_End_Of_Field(FORM *form)
 {
-  T((T_CALLED("FE_Clear_To_End_Of_Field(%p)"), form));
+  T((T_CALLED("FE_Clear_To_End_Of_Field(%p)"), (void *)form));
   wmove(form->w, form->currow, form->curcol);
   wclrtobot(form->w);
   returnCode(E_OK);
@@ -2829,7 +2935,7 @@ FE_Clear_To_End_Of_Field(FORM *form)
 static int
 FE_Clear_Field(FORM *form)
 {
-  T((T_CALLED("FE_Clear_Field(%p)"), form));
+  T((T_CALLED("FE_Clear_Field(%p)"), (void *)form));
   form->currow = form->curcol = 0;
   werase(form->w);
   returnCode(E_OK);
@@ -2853,8 +2959,8 @@ FE_Clear_Field(FORM *form)
 static int
 EM_Overlay_Mode(FORM *form)
 {
-  T((T_CALLED("EM_Overlay_Mode(%p)"), form));
-  form->status |= _OVLMODE;
+  T((T_CALLED("EM_Overlay_Mode(%p)"), (void *)form));
+  SetStatus(form, _OVLMODE);
   returnCode(E_OK);
 }
 
@@ -2869,8 +2975,8 @@ EM_Overlay_Mode(FORM *form)
 static int
 EM_Insert_Mode(FORM *form)
 {
-  T((T_CALLED("EM_Insert_Mode(%p)"), form));
-  form->status &= ~_OVLMODE;
+  T((T_CALLED("EM_Insert_Mode(%p)"), (void *)form));
+  ClrStatus(form, _OVLMODE);
   returnCode(E_OK);
 }
 
@@ -2884,7 +2990,7 @@ EM_Insert_Mode(FORM *form)
 
 /*---------------------------------------------------------------------------
 |   Facility      :  libnform
-|   Function      :  static bool Next_Choice(
+|   Function      :  static bool Next_Choice(FORM * form,
 |                                            FIELDTYPE * typ,
 |                                            FIELD * field,
 |                                            TypeArgument *argp)
@@ -2896,7 +3002,7 @@ EM_Insert_Mode(FORM *form)
 |                    FALSE   - couldn't retrieve next choice
 +--------------------------------------------------------------------------*/
 static bool
-Next_Choice(FIELDTYPE *typ, FIELD *field, TypeArgument *argp)
+Next_Choice(FORM *form, FIELDTYPE *typ, FIELD *field, TypeArgument *argp)
 {
   if (!typ || !(typ->status & _HAS_CHOICE))
     return FALSE;
@@ -2905,19 +3011,27 @@ Next_Choice(FIELDTYPE *typ, FIELD *field, TypeArgument *argp)
     {
       assert(argp);
       return (
-              Next_Choice(typ->left, field, argp->left) ||
-              Next_Choice(typ->right, field, argp->right));
+              Next_Choice(form, typ->left, field, argp->left) ||
+              Next_Choice(form, typ->right, field, argp->right));
     }
   else
     {
+#if NCURSES_INTEROP_FUNCS
+      assert(typ->enum_next.onext);
+      if (typ->status & _GENERIC)
+       return typ->enum_next.gnext(form, field, (void *)argp);
+      else
+       return typ->enum_next.onext(field, (void *)argp);
+#else
       assert(typ->next);
       return typ->next(field, (void *)argp);
+#endif
     }
 }
 
 /*---------------------------------------------------------------------------
 |   Facility      :  libnform
-|   Function      :  static bool Previous_Choice(
+|   Function      :  static bool Previous_Choice(FORM * form,
 |                                                FIELDTYPE * typ,
 |                                                FIELD * field,
 |                                                TypeArgument *argp)
@@ -2929,7 +3043,7 @@ Next_Choice(FIELDTYPE *typ, FIELD *field, TypeArgument *argp)
 |                    FALSE   - couldn't retrieve previous choice
 +--------------------------------------------------------------------------*/
 static bool
-Previous_Choice(FIELDTYPE *typ, FIELD *field, TypeArgument *argp)
+Previous_Choice(FORM *form, FIELDTYPE *typ, FIELD *field, TypeArgument *argp)
 {
   if (!typ || !(typ->status & _HAS_CHOICE))
     return FALSE;
@@ -2938,13 +3052,21 @@ Previous_Choice(FIELDTYPE *typ, FIELD *field, TypeArgument *argp)
     {
       assert(argp);
       return (
-              Previous_Choice(typ->left, field, argp->left) ||
-              Previous_Choice(typ->right, field, argp->right));
+              Previous_Choice(form, typ->left, field, argp->left) ||
+              Previous_Choice(form, typ->right, field, argp->right));
     }
   else
     {
+#if NCURSES_INTEROP_FUNCS
+      assert(typ->enum_prev.oprev);
+      if (typ->status & _GENERIC)
+       return typ->enum_prev.gprev(form, field, (void *)argp);
+      else
+       return typ->enum_prev.oprev(field, (void *)argp);
+#else
       assert(typ->prev);
       return typ->prev(field, (void *)argp);
+#endif
     }
 }
 /*----------------------------------------------------------------------------
@@ -2969,9 +3091,9 @@ CR_Next_Choice(FORM *form)
 {
   FIELD *field = form->current;
 
-  T((T_CALLED("CR_Next_Choice(%p)"), form));
+  T((T_CALLED("CR_Next_Choice(%p)"), (void *)form));
   Synchronize_Buffer(form);
-  returnCode((Next_Choice(field->type, field, (TypeArgument *)(field->arg)))
+  returnCode((Next_Choice(form, field->type, field, (TypeArgument *)(field->arg)))
             ? E_OK
             : E_REQUEST_DENIED);
 }
@@ -2990,9 +3112,9 @@ CR_Previous_Choice(FORM *form)
 {
   FIELD *field = form->current;
 
-  T((T_CALLED("CR_Previous_Choice(%p)"), form));
+  T((T_CALLED("CR_Previous_Choice(%p)"), (void *)form));
   Synchronize_Buffer(form);
-  returnCode((Previous_Choice(field->type, field, (TypeArgument *)(field->arg)))
+  returnCode((Previous_Choice(form, field->type, field, (TypeArgument *)(field->arg)))
             ? E_OK
             : E_REQUEST_DENIED);
 }
@@ -3006,7 +3128,7 @@ CR_Previous_Choice(FORM *form)
 
 /*---------------------------------------------------------------------------
 |   Facility      :  libnform
-|   Function      :  static bool Check_Field(
+|   Function      :  static bool Check_Field(FORM* form,
 |                                            FIELDTYPE * typ,
 |                                            FIELD * field,
 |                                            TypeArgument * argp)
@@ -3019,11 +3141,11 @@ CR_Previous_Choice(FORM *form)
 |                    FALSE      - field is invalid.
 +--------------------------------------------------------------------------*/
 static bool
-Check_Field(FIELDTYPE *typ, FIELD *field, TypeArgument *argp)
+Check_Field(FORM *form, FIELDTYPE *typ, FIELD *field, TypeArgument *argp)
 {
   if (typ)
     {
-      if (field->opts & O_NULLOK)
+      if (Field_Has_Option(field, O_NULLOK))
        {
          FIELD_CELL *bp = field->buf;
 
@@ -3040,13 +3162,23 @@ Check_Field(FIELDTYPE *typ, FIELD *field, TypeArgument *argp)
        {
          assert(argp);
          return (
-                  Check_Field(typ->left, field, argp->left) ||
-                  Check_Field(typ->right, field, argp->right));
+                  Check_Field(form, typ->left, field, argp->left) ||
+                  Check_Field(form, typ->right, field, argp->right));
        }
       else
        {
+#if NCURSES_INTEROP_FUNCS
+         if (typ->fieldcheck.ofcheck)
+           {
+             if (typ->status & _GENERIC)
+               return typ->fieldcheck.gfcheck(form, field, (void *)argp);
+             else
+               return typ->fieldcheck.ofcheck(field, (void *)argp);
+           }
+#else
          if (typ->fcheck)
            return typ->fcheck(field, (void *)argp);
+#endif
        }
     }
   return TRUE;
@@ -3070,12 +3202,12 @@ _nc_Internal_Validation(FORM *form)
 
   Synchronize_Buffer(form);
   if ((form->status & _FCHECK_REQUIRED) ||
-      (!(field->opts & O_PASSOK)))
+      (!(Field_Has_Option(field, O_PASSOK))))
     {
-      if (!Check_Field(field->type, field, (TypeArgument *)(field->arg)))
+      if (!Check_Field(form, field->type, field, (TypeArgument *)(field->arg)))
        return FALSE;
-      form->status &= ~_FCHECK_REQUIRED;
-      field->status |= _CHANGED;
+      ClrStatus(form, _FCHECK_REQUIRED);
+      SetStatus(field, _CHANGED);
       Synchronize_Linked_Fields(field);
     }
   return TRUE;
@@ -3100,7 +3232,7 @@ _nc_Internal_Validation(FORM *form)
 static int
 FV_Validation(FORM *form)
 {
-  T((T_CALLED("FV_Validation(%p)"), form));
+  T((T_CALLED("FV_Validation(%p)"), (void *)form));
   if (_nc_Internal_Validation(form))
     returnCode(E_OK);
   else
@@ -3175,14 +3307,15 @@ _nc_First_Active_Field(FORM *form)
          do
            {
              field = (field == last_on_page) ? first : field + 1;
-             if (((*field)->opts & O_VISIBLE))
+             if (Field_Has_Option(*field, O_VISIBLE))
                break;
            }
          while (proposed != (*field));
 
          proposed = *field;
 
-         if ((proposed == *last_on_page) && !(proposed->opts & O_VISIBLE))
+         if ((proposed == *last_on_page) &&
+             !((unsigned)proposed->opts & O_VISIBLE))
            {
              /* This means, there is also no visible field on the page.
                 So we propose the first one and hope the very best...
@@ -3478,7 +3611,7 @@ Inter_Field_Navigation(int (*const fct) (FORM *), FORM *form)
 static int
 FN_Next_Field(FORM *form)
 {
-  T((T_CALLED("FN_Next_Field(%p)"), form));
+  T((T_CALLED("FN_Next_Field(%p)"), (void *)form));
   returnCode(_nc_Set_Current_Field(form,
                                   Next_Field_On_Page(form->current)));
 }
@@ -3496,7 +3629,7 @@ FN_Next_Field(FORM *form)
 static int
 FN_Previous_Field(FORM *form)
 {
-  T((T_CALLED("FN_Previous_Field(%p)"), form));
+  T((T_CALLED("FN_Previous_Field(%p)"), (void *)form));
   returnCode(_nc_Set_Current_Field(form,
                                   Previous_Field_On_Page(form->current)));
 }
@@ -3513,7 +3646,7 @@ FN_Previous_Field(FORM *form)
 static int
 FN_First_Field(FORM *form)
 {
-  T((T_CALLED("FN_First_Field(%p)"), form));
+  T((T_CALLED("FN_First_Field(%p)"), (void *)form));
   returnCode(_nc_Set_Current_Field(form,
                                   Next_Field_On_Page(form->field[form->page[form->curpage].pmax])));
 }
@@ -3530,7 +3663,7 @@ FN_First_Field(FORM *form)
 static int
 FN_Last_Field(FORM *form)
 {
-  T((T_CALLED("FN_Last_Field(%p)"), form));
+  T((T_CALLED("FN_Last_Field(%p)"), (void *)form));
   returnCode(
              _nc_Set_Current_Field(form,
                                    Previous_Field_On_Page(form->field[form->page[form->curpage].pmin])));
@@ -3549,7 +3682,7 @@ FN_Last_Field(FORM *form)
 static int
 FN_Sorted_Next_Field(FORM *form)
 {
-  T((T_CALLED("FN_Sorted_Next_Field(%p)"), form));
+  T((T_CALLED("FN_Sorted_Next_Field(%p)"), (void *)form));
   returnCode(_nc_Set_Current_Field(form,
                                   Sorted_Next_Field(form->current)));
 }
@@ -3567,7 +3700,7 @@ FN_Sorted_Next_Field(FORM *form)
 static int
 FN_Sorted_Previous_Field(FORM *form)
 {
-  T((T_CALLED("FN_Sorted_Previous_Field(%p)"), form));
+  T((T_CALLED("FN_Sorted_Previous_Field(%p)"), (void *)form));
   returnCode(_nc_Set_Current_Field(form,
                                   Sorted_Previous_Field(form->current)));
 }
@@ -3585,7 +3718,7 @@ FN_Sorted_Previous_Field(FORM *form)
 static int
 FN_Sorted_First_Field(FORM *form)
 {
-  T((T_CALLED("FN_Sorted_First_Field(%p)"), form));
+  T((T_CALLED("FN_Sorted_First_Field(%p)"), (void *)form));
   returnCode(_nc_Set_Current_Field(form,
                                   Sorted_Next_Field(form->field[form->page[form->curpage].smax])));
 }
@@ -3603,7 +3736,7 @@ FN_Sorted_First_Field(FORM *form)
 static int
 FN_Sorted_Last_Field(FORM *form)
 {
-  T((T_CALLED("FN_Sorted_Last_Field(%p)"), form));
+  T((T_CALLED("FN_Sorted_Last_Field(%p)"), (void *)form));
   returnCode(_nc_Set_Current_Field(form,
                                   Sorted_Previous_Field(form->field[form->page[form->curpage].smin])));
 }
@@ -3621,7 +3754,7 @@ FN_Sorted_Last_Field(FORM *form)
 static int
 FN_Left_Field(FORM *form)
 {
-  T((T_CALLED("FN_Left_Field(%p)"), form));
+  T((T_CALLED("FN_Left_Field(%p)"), (void *)form));
   returnCode(_nc_Set_Current_Field(form,
                                   Left_Neighbor_Field(form->current)));
 }
@@ -3639,7 +3772,7 @@ FN_Left_Field(FORM *form)
 static int
 FN_Right_Field(FORM *form)
 {
-  T((T_CALLED("FN_Right_Field(%p)"), form));
+  T((T_CALLED("FN_Right_Field(%p)"), (void *)form));
   returnCode(_nc_Set_Current_Field(form,
                                   Right_Neighbor_Field(form->current)));
 }
@@ -3659,7 +3792,7 @@ FN_Right_Field(FORM *form)
 static int
 FN_Up_Field(FORM *form)
 {
-  T((T_CALLED("FN_Up_Field(%p)"), form));
+  T((T_CALLED("FN_Up_Field(%p)"), (void *)form));
   returnCode(_nc_Set_Current_Field(form,
                                   Upper_Neighbor_Field(form->current)));
 }
@@ -3679,7 +3812,7 @@ FN_Up_Field(FORM *form)
 static int
 FN_Down_Field(FORM *form)
 {
-  T((T_CALLED("FN_Down_Field(%p)"), form));
+  T((T_CALLED("FN_Down_Field(%p)"), (void *)form));
   returnCode(_nc_Set_Current_Field(form,
                                   Down_Neighbor_Field(form->current)));
 }
@@ -3718,11 +3851,11 @@ _nc_Set_Form_Page(FORM *form, int page, FIELD *field)
       FIELD *last_field, *field_on_page;
 
       werase(Get_Form_Window(form));
-      form->curpage = page;
+      form->curpage = (short)page;
       last_field = field_on_page = form->field[form->page[page].smin];
       do
        {
-         if (field_on_page->opts & O_VISIBLE)
+         if ((unsigned)field_on_page->opts & O_VISIBLE)
            if ((res = Display_Field(field_on_page)) != E_OK)
              return (res);
          field_on_page = field_on_page->snext;
@@ -3823,7 +3956,7 @@ Page_Navigation(int (*const fct) (FORM *), FORM *form)
 static int
 PN_Next_Page(FORM *form)
 {
-  T((T_CALLED("PN_Next_Page(%p)"), form));
+  T((T_CALLED("PN_Next_Page(%p)"), (void *)form));
   returnCode(_nc_Set_Form_Page(form, Next_Page_Number(form), (FIELD *)0));
 }
 
@@ -3839,7 +3972,7 @@ PN_Next_Page(FORM *form)
 static int
 PN_Previous_Page(FORM *form)
 {
-  T((T_CALLED("PN_Previous_Page(%p)"), form));
+  T((T_CALLED("PN_Previous_Page(%p)"), (void *)form));
   returnCode(_nc_Set_Form_Page(form, Previous_Page_Number(form), (FIELD *)0));
 }
 
@@ -3855,7 +3988,7 @@ PN_Previous_Page(FORM *form)
 static int
 PN_First_Page(FORM *form)
 {
-  T((T_CALLED("PN_First_Page(%p)"), form));
+  T((T_CALLED("PN_First_Page(%p)"), (void *)form));
   returnCode(_nc_Set_Form_Page(form, 0, (FIELD *)0));
 }
 
@@ -3871,7 +4004,7 @@ PN_First_Page(FORM *form)
 static int
 PN_Last_Page(FORM *form)
 {
-  T((T_CALLED("PN_Last_Page(%p)"), form));
+  T((T_CALLED("PN_Last_Page(%p)"), (void *)form));
   returnCode(_nc_Set_Form_Page(form, form->maxpage - 1, (FIELD *)0));
 }
 
@@ -3883,6 +4016,94 @@ PN_Last_Page(FORM *form)
   Helper routines for the core form driver.
   --------------------------------------------------------------------------*/
 
+# if USE_WIDEC_SUPPORT
+/*---------------------------------------------------------------------------
+|   Facility      :  libnform
+|   Function      :  static int Data_Entry_w(FORM * form, wchar_t c)
+|
+|   Description   :  Enter the wide character c into at the current
+|                    position of the current field of the form.
+|
+|   Return Values :  E_OK              - success
+|                    E_REQUEST_DENIED  - driver could not process the request
+|                    E_SYSTEM_ERROR    -
++--------------------------------------------------------------------------*/
+static int
+Data_Entry_w(FORM *form, wchar_t c)
+{
+  FIELD *field = form->current;
+  int result = E_REQUEST_DENIED;
+
+  T((T_CALLED("Data_Entry(%p,%s)"), (void *)form, _tracechtype((chtype)c)));
+  if ((Field_Has_Option(field, O_EDIT))
+#if FIX_FORM_INACTIVE_BUG
+      && (Field_Has_Option(field, O_ACTIVE))
+#endif
+    )
+    {
+      wchar_t given[2];
+      cchar_t temp_ch;
+
+      given[0] = c;
+      given[1] = 0;
+      setcchar(&temp_ch, given, 0, 0, (void *)0);
+      if ((Field_Has_Option(field, O_BLANK)) &&
+         First_Position_In_Current_Field(form) &&
+         !(form->status & _FCHECK_REQUIRED) &&
+         !(form->status & _WINDOW_MODIFIED))
+       werase(form->w);
+
+      if (form->status & _OVLMODE)
+       {
+         wadd_wch(form->w, &temp_ch);
+       }
+      else
+       /* no _OVLMODE */
+       {
+         bool There_Is_Room = Is_There_Room_For_A_Char_In_Line(form);
+
+         if (!(There_Is_Room ||
+               ((Single_Line_Field(field) && Growable(field)))))
+           RETURN(E_REQUEST_DENIED);
+
+         if (!There_Is_Room && !Field_Grown(field, 1))
+           RETURN(E_SYSTEM_ERROR);
+
+         wins_wch(form->w, &temp_ch);
+       }
+
+      if ((result = Wrapping_Not_Necessary_Or_Wrapping_Ok(form)) == E_OK)
+       {
+         bool End_Of_Field = (((field->drows - 1) == form->currow) &&
+                              ((field->dcols - 1) == form->curcol));
+
+         form->status |= _WINDOW_MODIFIED;
+         if (End_Of_Field && !Growable(field) && (Field_Has_Option(field, O_AUTOSKIP)))
+           result = Inter_Field_Navigation(FN_Next_Field, form);
+         else
+           {
+             if (End_Of_Field && Growable(field) && !Field_Grown(field, 1))
+               result = E_SYSTEM_ERROR;
+             else
+               {
+                 /*
+                  * We have just added a byte to the form field.  It may have
+                  * been part of a multibyte character.  If it was, the
+                  * addch_used field is nonzero and we should not try to move
+                  * to a new column.
+                  */
+                 if (WINDOW_EXT(form->w, addch_used) == 0)
+                   IFN_Next_Character(form);
+
+                 result = E_OK;
+               }
+           }
+       }
+    }
+  RETURN(result);
+}
+# endif
+
 /*---------------------------------------------------------------------------
 |   Facility      :  libnform
 |   Function      :  static int Data_Entry(FORM * form,int c)
@@ -3900,14 +4121,14 @@ Data_Entry(FORM *form, int c)
   FIELD *field = form->current;
   int result = E_REQUEST_DENIED;
 
-  T((T_CALLED("Data_Entry(%p,%s)"), form, _tracechtype((chtype)c)));
-  if ((field->opts & O_EDIT)
+  T((T_CALLED("Data_Entry(%p,%s)"), (void *)form, _tracechtype((chtype)c)));
+  if ((Field_Has_Option(field, O_EDIT))
 #if FIX_FORM_INACTIVE_BUG
-      && (field->opts & O_ACTIVE)
+      && (Field_Has_Option(field, O_ACTIVE))
 #endif
     )
     {
-      if ((field->opts & O_BLANK) &&
+      if ((Field_Has_Option(field, O_BLANK)) &&
          First_Position_In_Current_Field(form) &&
          !(form->status & _FCHECK_REQUIRED) &&
          !(form->status & _WINDOW_MODIFIED))
@@ -3937,8 +4158,8 @@ Data_Entry(FORM *form, int c)
          bool End_Of_Field = (((field->drows - 1) == form->currow) &&
                               ((field->dcols - 1) == form->curcol));
 
-         form->status |= _WINDOW_MODIFIED;
-         if (End_Of_Field && !Growable(field) && (field->opts & O_AUTOSKIP))
+         SetStatus(form, _WINDOW_MODIFIED);
+         if (End_Of_Field && !Growable(field) && (Field_Has_Option(field, O_AUTOSKIP)))
            result = Inter_Field_Navigation(FN_Next_Field, form);
          else
            {
@@ -4101,7 +4322,7 @@ form_driver(FORM *form, int c)
   const Binding_Info *BI = (Binding_Info *) 0;
   int res = E_UNKNOWN_COMMAND;
 
-  T((T_CALLED("form_driver(%p,%d)"), form, c));
+  T((T_CALLED("form_driver(%p,%d)"), (void *)form, c));
 
   if (!form)
     RETURN(E_BAD_ARGUMENT);
@@ -4130,7 +4351,10 @@ form_driver(FORM *form, int c)
 
   if ((c >= MIN_FORM_COMMAND && c <= MAX_FORM_COMMAND) &&
       ((bindings[c - MIN_FORM_COMMAND].keycode & Key_Mask) == c))
-    BI = &(bindings[c - MIN_FORM_COMMAND]);
+    {
+      TR(TRACE_CALLS, ("form_request %s", form_request_name(c)));
+      BI = &(bindings[c - MIN_FORM_COMMAND]);
+    }
 
   if (BI)
     {
@@ -4148,7 +4372,7 @@ form_driver(FORM *form, int c)
        NULL                    /* Choice Request is generic           */
       };
       size_t nMethods = (sizeof(Generic_Methods) / sizeof(Generic_Methods[0]));
-      size_t method = ((BI->keycode & ID_Mask) >> ID_Shft) & 0xffff;
+      size_t method = (size_t) ((BI->keycode >> ID_Shft) & 0xffff);    /* see ID_Mask */
 
       if ((method >= nMethods) || !(BI->cmd))
        res = E_SYSTEM_ERROR;
@@ -4157,11 +4381,92 @@ form_driver(FORM *form, int c)
          Generic_Method fct = Generic_Methods[method];
 
          if (fct)
-           res = fct(BI->cmd, form);
+           {
+             res = fct(BI->cmd, form);
+           }
          else
-           res = (BI->cmd) (form);
+           {
+             res = (BI->cmd) (form);
+           }
        }
     }
+#ifdef NCURSES_MOUSE_VERSION
+  else if (KEY_MOUSE == c)
+    {
+      MEVENT event;
+      WINDOW *win = form->win ? form->win : StdScreen(Get_Form_Screen(form));
+      WINDOW *sub = form->sub ? form->sub : win;
+
+      getmouse(&event);
+      if ((event.bstate & (BUTTON1_CLICKED |
+                          BUTTON1_DOUBLE_CLICKED |
+                          BUTTON1_TRIPLE_CLICKED))
+         && wenclose(win, event.y, event.x))
+       {                       /* we react only if the click was in the userwin, that means
+                                * inside the form display area or at the decoration window.
+                                */
+         int ry = event.y, rx = event.x;       /* screen coordinates */
+
+         res = E_REQUEST_DENIED;
+         if (mouse_trafo(&ry, &rx, FALSE))
+           {                   /* rx, ry are now "curses" coordinates */
+             if (ry < sub->_begy)
+               {               /* we clicked above the display region; this is
+                                * interpreted as "scroll up" request
+                                */
+                 if (event.bstate & BUTTON1_CLICKED)
+                   res = form_driver(form, REQ_PREV_FIELD);
+                 else if (event.bstate & BUTTON1_DOUBLE_CLICKED)
+                   res = form_driver(form, REQ_PREV_PAGE);
+                 else if (event.bstate & BUTTON1_TRIPLE_CLICKED)
+                   res = form_driver(form, REQ_FIRST_FIELD);
+               }
+             else if (ry > sub->_begy + sub->_maxy)
+               {               /* we clicked below the display region; this is
+                                * interpreted as "scroll down" request
+                                */
+                 if (event.bstate & BUTTON1_CLICKED)
+                   res = form_driver(form, REQ_NEXT_FIELD);
+                 else if (event.bstate & BUTTON1_DOUBLE_CLICKED)
+                   res = form_driver(form, REQ_NEXT_PAGE);
+                 else if (event.bstate & BUTTON1_TRIPLE_CLICKED)
+                   res = form_driver(form, REQ_LAST_FIELD);
+               }
+             else if (wenclose(sub, event.y, event.x))
+               {               /* Inside the area we try to find the hit item */
+                 int i;
+
+                 ry = event.y;
+                 rx = event.x;
+                 if (wmouse_trafo(sub, &ry, &rx, FALSE))
+                   {
+                     int min_field = form->page[form->curpage].pmin;
+                     int max_field = form->page[form->curpage].pmax;
+
+                     for (i = min_field; i <= max_field; ++i)
+                       {
+                         FIELD *field = form->field[i];
+
+                         if (Field_Is_Selectable(field)
+                             && Field_encloses(field, ry, rx) == E_OK)
+                           {
+                             res = _nc_Set_Current_Field(form, field);
+                             if (res == E_OK)
+                               res = _nc_Position_Form_Cursor(form);
+                             if (res == E_OK
+                                 && (event.bstate & BUTTON1_DOUBLE_CLICKED))
+                               res = E_UNKNOWN_COMMAND;
+                             break;
+                           }
+                       }
+                   }
+               }
+           }
+       }
+      else
+       res = E_REQUEST_DENIED;
+    }
+#endif /* NCURSES_MOUSE_VERSION */
   else if (!(c & (~(int)MAX_REGULAR_CHARACTER)))
     {
       /*
@@ -4176,7 +4481,7 @@ form_driver(FORM *form, int c)
       if (!iscntrl(UChar(c)))
 #else
       if (isprint(UChar(c)) &&
-         Check_Char(form->current->type, c,
+         Check_Char(form, form->current, form->current->type, c,
                     (TypeArgument *)(form->current->arg)))
 #endif
        res = Data_Entry(form, c);
@@ -4185,6 +4490,195 @@ form_driver(FORM *form, int c)
   RETURN(res);
 }
 
+# if USE_WIDEC_SUPPORT
+/*---------------------------------------------------------------------------
+|   Facility      :  libnform
+|   Function      :  int form_driver_w(FORM * form,int type,wchar_t  c)
+|
+|   Description   :  This is the workhorse of the forms system.
+|
+|                    Input is either a key code (request) or a wide char
+|                    returned by e.g. get_wch (). The type must be passed
+|                    as well,so that we are able to determine whether the char
+|                    is a multibyte char or a request.
+
+|                    If it is a request, the form driver executes
+|                    the request and returns the result. If it is data
+|                    (printable character), it enters the data into the
+|                    current position in the current field. If it is not
+|                    recognized, the form driver assumes it is an application
+|                    defined command and returns E_UNKNOWN_COMMAND.
+|                    Application defined command should be defined relative
+|                    to MAX_FORM_COMMAND, the maximum value of a request.
+|
+|   Return Values :  E_OK              - success
+|                    E_SYSTEM_ERROR    - system error
+|                    E_BAD_ARGUMENT    - an argument is incorrect
+|                    E_NOT_POSTED      - form is not posted
+|                    E_INVALID_FIELD   - field contents are invalid
+|                    E_BAD_STATE       - called from inside a hook routine
+|                    E_REQUEST_DENIED  - request failed
+|                    E_NOT_CONNECTED   - no fields are connected to the form
+|                    E_UNKNOWN_COMMAND - command not known
++--------------------------------------------------------------------------*/
+NCURSES_EXPORT(int)
+form_driver_w(FORM *form, int type, wchar_t c)
+{
+  const Binding_Info *BI = (Binding_Info *) 0;
+  int res = E_UNKNOWN_COMMAND;
+
+  T((T_CALLED("form_driver(%p,%d)"), (void *)form, (int)c));
+
+  if (!form)
+    RETURN(E_BAD_ARGUMENT);
+
+  if (!(form->field))
+    RETURN(E_NOT_CONNECTED);
+
+  assert(form->page);
+
+  if (c == (wchar_t)FIRST_ACTIVE_MAGIC)
+    {
+      form->current = _nc_First_Active_Field(form);
+      RETURN(E_OK);
+    }
+
+  assert(form->current &&
+        form->current->buf &&
+        (form->current->form == form)
+    );
+
+  if (form->status & _IN_DRIVER)
+    RETURN(E_BAD_STATE);
+
+  if (!(form->status & _POSTED))
+    RETURN(E_NOT_POSTED);
+
+  /* check if this is a keycode or a (wide) char */
+  if (type == KEY_CODE_YES)
+    {
+      if ((c >= MIN_FORM_COMMAND && c <= MAX_FORM_COMMAND) &&
+         ((bindings[c - MIN_FORM_COMMAND].keycode & Key_Mask) == c))
+       BI = &(bindings[c - MIN_FORM_COMMAND]);
+    }
+
+  if (BI)
+    {
+      typedef int (*Generic_Method) (int (*const) (FORM *), FORM *);
+      static const Generic_Method Generic_Methods[] =
+      {
+       Page_Navigation,        /* overloaded to call field&form hooks */
+       Inter_Field_Navigation, /* overloaded to call field hooks      */
+       NULL,                   /* Intra-Field is generic              */
+       Vertical_Scrolling,     /* Overloaded to check multi-line      */
+       Horizontal_Scrolling,   /* Overloaded to check single-line     */
+       Field_Editing,          /* Overloaded to mark modification     */
+       NULL,                   /* Edit Mode is generic                */
+       NULL,                   /* Field Validation is generic         */
+       NULL                    /* Choice Request is generic           */
+      };
+      size_t nMethods = (sizeof(Generic_Methods) / sizeof(Generic_Methods[0]));
+      size_t method = (size_t) (BI->keycode >> ID_Shft) & 0xffff;      /* see ID_Mask */
+
+      if ((method >= nMethods) || !(BI->cmd))
+       res = E_SYSTEM_ERROR;
+      else
+       {
+         Generic_Method fct = Generic_Methods[method];
+
+         if (fct)
+           res = fct(BI->cmd, form);
+         else
+           res = (BI->cmd) (form);
+       }
+    }
+#ifdef NCURSES_MOUSE_VERSION
+  else if (KEY_MOUSE == c)
+    {
+      MEVENT event;
+      WINDOW *win = form->win ? form->win : StdScreen(Get_Form_Screen(form));
+      WINDOW *sub = form->sub ? form->sub : win;
+
+      getmouse(&event);
+      if ((event.bstate & (BUTTON1_CLICKED |
+                          BUTTON1_DOUBLE_CLICKED |
+                          BUTTON1_TRIPLE_CLICKED))
+         && wenclose(win, event.y, event.x))
+       {                       /* we react only if the click was in the userwin, that means
+                                  * inside the form display area or at the decoration window.
+                                */
+         int ry = event.y, rx = event.x;       /* screen coordinates */
+
+         res = E_REQUEST_DENIED;
+         if (mouse_trafo(&ry, &rx, FALSE))
+           {                   /* rx, ry are now "curses" coordinates */
+             if (ry < sub->_begy)
+               {               /* we clicked above the display region; this is
+                                  * interpreted as "scroll up" request
+                                */
+                 if (event.bstate & BUTTON1_CLICKED)
+                   res = form_driver(form, REQ_PREV_FIELD);
+                 else if (event.bstate & BUTTON1_DOUBLE_CLICKED)
+                   res = form_driver(form, REQ_PREV_PAGE);
+                 else if (event.bstate & BUTTON1_TRIPLE_CLICKED)
+                   res = form_driver(form, REQ_FIRST_FIELD);
+               }
+             else if (ry > sub->_begy + sub->_maxy)
+               {               /* we clicked below the display region; this is
+                                  * interpreted as "scroll down" request
+                                */
+                 if (event.bstate & BUTTON1_CLICKED)
+                   res = form_driver(form, REQ_NEXT_FIELD);
+                 else if (event.bstate & BUTTON1_DOUBLE_CLICKED)
+                   res = form_driver(form, REQ_NEXT_PAGE);
+                 else if (event.bstate & BUTTON1_TRIPLE_CLICKED)
+                   res = form_driver(form, REQ_LAST_FIELD);
+               }
+             else if (wenclose(sub, event.y, event.x))
+               {               /* Inside the area we try to find the hit item */
+                 int i;
+
+                 ry = event.y;
+                 rx = event.x;
+                 if (wmouse_trafo(sub, &ry, &rx, FALSE))
+                   {
+                     int min_field = form->page[form->curpage].pmin;
+                     int max_field = form->page[form->curpage].pmax;
+
+                     for (i = min_field; i <= max_field; ++i)
+                       {
+                         FIELD *field = form->field[i];
+
+                         if (Field_Is_Selectable(field)
+                             && Field_encloses(field, ry, rx) == E_OK)
+                           {
+                             res = _nc_Set_Current_Field(form, field);
+                             if (res == E_OK)
+                               res = _nc_Position_Form_Cursor(form);
+                             if (res == E_OK
+                                 && (event.bstate & BUTTON1_DOUBLE_CLICKED))
+                               res = E_UNKNOWN_COMMAND;
+                             break;
+                           }
+                       }
+                   }
+               }
+           }
+       }
+      else
+       res = E_REQUEST_DENIED;
+    }
+#endif /* NCURSES_MOUSE_VERSION */
+  else if (type == OK)
+    {
+      res = Data_Entry_w(form, c);
+    }
+
+  _nc_Refresh_Current_Field(form);
+  RETURN(res);
+}
+# endif        /* USE_WIDEC_SUPPORT */
+
 /*----------------------------------------------------------------------------
   Field-Buffer manipulation routines.
   The effects of setting a buffer are tightly coupled to the core of the form
@@ -4214,35 +4708,26 @@ set_field_buffer(FIELD *field, int buffer, const char *value)
 {
   FIELD_CELL *p;
   int res = E_OK;
-  unsigned int i;
-  unsigned int len;
+  int i;
+  int len;
 
 #if USE_WIDEC_SUPPORT
   FIELD_CELL *widevalue = 0;
 #endif
 
-  T((T_CALLED("set_field_buffer(%p,%d,%s)"), field, buffer, _nc_visbuf(value)));
+  T((T_CALLED("set_field_buffer(%p,%d,%s)"), (void *)field, buffer, _nc_visbuf(value)));
 
   if (!field || !value || ((buffer < 0) || (buffer > field->nbuf)))
     RETURN(E_BAD_ARGUMENT);
 
   len = Buffer_Length(field);
 
-  if (buffer == 0)
-    {
-      for (i = 0; (value[i] != '\0') && (i < len); ++i)
-       {
-         if (iscntrl(UChar(value[i])))
-           RETURN(E_BAD_ARGUMENT);
-       }
-    }
-
   if (Growable(field))
     {
       /* for a growable field we must assume zero terminated strings, because
          somehow we have to detect the length of what should be copied.
        */
-      unsigned int vlen = strlen(value);
+      int vlen = (int)strlen(value);
 
       if (vlen > len)
        {
@@ -4251,15 +4736,9 @@ set_field_buffer(FIELD *field, int buffer, const char *value)
                                                     * field->cols))))
            RETURN(E_SYSTEM_ERROR);
 
-         /* in this case we also have to check, whether or not the remaining
-            characters in value are also printable for buffer 0. */
-         if (buffer == 0)
-           {
-             for (i = len; i < vlen; i++)
-               if (iscntrl(UChar(value[i])))
-                 RETURN(E_BAD_ARGUMENT);
-           }
+#if !USE_WIDEC_SUPPORT
          len = vlen;
+#endif
        }
     }
 
@@ -4271,16 +4750,29 @@ set_field_buffer(FIELD *field, int buffer, const char *value)
    * There should be a better way, but this handles nonspacing characters
    * and other special cases that we really do not want to handle here.
    */
+#if NCURSES_EXT_FUNCS
+  if (wresize(field->working, 1, Buffer_Length(field) + 1) == ERR)
+#endif
+    {
+      delwin(field->working);
+      field->working = newpad(1, Buffer_Length(field) + 1);
+    }
+  len = Buffer_Length(field);
   wclear(field->working);
-  mvwaddstr(field->working, 0, 0, value);
+  (void)mvwaddstr(field->working, 0, 0, value);
 
-  if ((widevalue = (FIELD_CELL *)calloc(len + 1, sizeof(FIELD_CELL))) == 0)
+  if ((widevalue = typeCalloc(FIELD_CELL, len + 1)) == 0)
     {
       RETURN(E_SYSTEM_ERROR);
     }
   else
     {
-      mvwin_wchnstr(field->working, 0, 0, widevalue, (int)len);
+      for (i = 0; i < field->drows; ++i)
+       {
+         (void)mvwin_wchnstr(field->working, 0, (int)i * field->dcols,
+                             widevalue + ((int)i * field->dcols),
+                             field->dcols);
+       }
       for (i = 0; i < len; ++i)
        {
          if (CharEq(myZEROS, widevalue[i]))
@@ -4333,31 +4825,28 @@ field_buffer(const FIELD *field, int buffer)
 {
   char *result = 0;
 
-  T((T_CALLED("field_buffer(%p,%d)"), field, buffer));
+  T((T_CALLED("field_buffer(%p,%d)"), (const void *)field, buffer));
 
   if (field && (buffer >= 0) && (buffer <= field->nbuf))
     {
 #if USE_WIDEC_SUPPORT
       FIELD_CELL *data = Address_Of_Nth_Buffer(field, buffer);
-      unsigned need = 0;
+      size_t need = 0;
       int size = Buffer_Length(field);
       int n;
 
       /* determine the number of bytes needed to store the expanded string */
       for (n = 0; n < size; ++n)
        {
-         if (!isWidecExt(data[n]))
+         if (!isWidecExt(data[n]) && data[n].chars[0] != L'\0')
            {
              mbstate_t state;
              size_t next;
 
              init_mb(state);
              next = _nc_wcrtomb(0, data[n].chars[0], &state);
-             if (!isEILSEQ(next))
-               {
-                 if (next != 0)
-                   need += next;
-               }
+             if (next > 0)
+               need += next;
            }
        }
 
@@ -4366,12 +4855,25 @@ field_buffer(const FIELD *field, int buffer)
        free(field->expanded[buffer]);
       field->expanded[buffer] = typeMalloc(char, need + 1);
 
-      /* expand the multibyte data */
+      /*
+       * Expand the multibyte data.
+       *
+       * It may also be multi-column data.  In that case, the data for a row
+       * may be null-padded to align to the dcols/drows layout (or it may
+       * contain embedded wide-character extensions).  Change the null-padding
+       * to blanks as needed.
+       */
       if ((result = field->expanded[buffer]) != 0)
        {
          wclear(field->working);
-         mvwadd_wchnstr(field->working, 0, 0, data, size);
-         mvwinnstr(field->working, 0, 0, result, (int)need + 1);
+         wmove(field->working, 0, 0);
+         for (n = 0; n < size; ++n)
+           {
+             if (!isWidecExt(data[n]) && data[n].chars[0] != L'\0')
+               wadd_wch(field->working, &data[n]);
+           }
+         wmove(field->working, 0, 0);
+         winnstr(field->working, result, (int)need);
        }
 #else
       result = Address_Of_Nth_Buffer(field, buffer);
@@ -4382,22 +4884,6 @@ field_buffer(const FIELD *field, int buffer)
 
 #if USE_WIDEC_SUPPORT
 
-/* FIXME: see lib_get_wch.c */
-#if HAVE_MBTOWC && HAVE_MBLEN
-#define reset_mbytes(state) mblen(NULL, 0), mbtowc(NULL, NULL, 0)
-#define count_mbytes(buffer,length,state) mblen(buffer,length)
-#define trans_mbytes(wch,buffer,length,state) \
-       (int) mbtowc(&wch, buffer, length)
-#elif HAVE_MBRTOWC && HAVE_MBRLEN
-#define NEED_STATE
-#define reset_mbytes(state) init_mb(state)
-#define count_mbytes(buffer,length,state) mbrlen(buffer,length,&state)
-#define trans_mbytes(wch,buffer,length,state) \
-       (int) mbrtowc(&wch, buffer, length, &state)
-#else
-make an error
-#endif
-
 /*---------------------------------------------------------------------------
 | Convert a multibyte string to a wide-character string.  The result must be
 | freed by the caller.
@@ -4412,7 +4898,7 @@ _nc_Widen_String(char *source, int *lengthp)
   int pass;
   int status;
 
-#ifdef NEED_STATE
+#ifndef state_unused
   mbstate_t state;
 #endif
 
@@ -4431,8 +4917,8 @@ _nc_Widen_String(char *source, int *lengthp)
 
              source[passed + tries] = 0;
              reset_mbytes(state);
-             status = trans_mbytes(wch, source + passed, tries, state);
-             source[passed + tries] = save;
+             status = check_mbytes(wch, source + passed, tries, state);
+             source[passed + tries] = (char)save;
 
              if (status > 0)
                {
@@ -4446,14 +4932,14 @@ _nc_Widen_String(char *source, int *lengthp)
                {
                  result[need] = wch;
                }
-             passed += status;
+             passed += (size_t) status;
              ++need;
            }
          else
            {
              if (pass)
                {
-                 result[need] = source[passed];
+                 result[need] = (wchar_t)source[passed];
                }
              ++need;
              ++passed;
@@ -4466,7 +4952,7 @@ _nc_Widen_String(char *source, int *lengthp)
            break;
          result = typeCalloc(wchar_t, need);
 
-         *lengthp = need;
+         *lengthp = (int)need;
          if (result == 0)
            break;
        }