ncurses 5.7 - patch 20090829
[ncurses.git] / form / frm_driver.c
index dfb6699ebdf3bb68e54cef11d1026d69acd27078..8d9bd3ba6f5091ead1be0eb3aac5c0e9d2018284 100644 (file)
@@ -1,5 +1,5 @@
 /****************************************************************************
 /****************************************************************************
- * Copyright (c) 1998-2006,2007 Free Software Foundation, Inc.              *
+ * Copyright (c) 1998-2008,2009 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            *
  *                                                                          *
  * 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"
 
 
 #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 1.90 2009/08/29 19:02:25 tom Exp $")
 
 /*----------------------------------------------------------------------------
   This is the core module of the form library. It contains the majority
 
 /*----------------------------------------------------------------------------
   This is the core module of the form library. It contains the majority
@@ -188,7 +188,7 @@ static int FE_Delete_Previous(FORM *);
 /* Macro to set the attributes for a fields window */
 #define Set_Field_Window_Attributes(field,win) \
 (  wbkgdset((win),(chtype)((field)->pad | (field)->back)), \
 /* 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) )
+   (void) wattrset((win),(field)->fore) )
 
 /* Logic to decide whether or not a field really appears on the form */
 #define Field_Really_Appears(field)         \
 
 /* Logic to decide whether or not a field really appears on the form */
 #define Field_Really_Appears(field)         \
@@ -676,7 +676,7 @@ Field_Grown(FIELD *field, int amount)
              new_bp[new_buflen] = myZEROS;
            }
 
              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
          if (wresize(field->working, 1, Buffer_Length(field) + 1) == ERR)
            result = FALSE;
 #endif
@@ -737,6 +737,34 @@ Field_Grown(FIELD *field, int amount)
   return (result);
 }
 
   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)"), 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)
 /*---------------------------------------------------------------------------
 |   Facility      :  libnform
 |   Function      :  int _nc_Position_Form_Cursor(FORM * form)
@@ -1045,9 +1073,13 @@ Display_Or_Erase_Field(FIELD *field, bool bEraseFlag)
   else
     {
       if (field->opts & O_VISIBLE)
   else
     {
       if (field->opts & O_VISIBLE)
-       Set_Field_Window_Attributes(field, win);
+       {
+         Set_Field_Window_Attributes(field, win);
+       }
       else
       else
-       wattrset(win, WINDOW_ATTRS(fwin));
+       {
+         (void)wattrset(win, WINDOW_ATTRS(fwin));
+       }
       werase(win);
     }
 
       werase(win);
     }
 
@@ -4148,7 +4180,7 @@ form_driver(FORM *form, int c)
        NULL                    /* Choice Request is generic           */
       };
       size_t nMethods = (sizeof(Generic_Methods) / sizeof(Generic_Methods[0]));
        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 = (BI->keycode >> ID_Shft) & 0xffff;       /* see ID_Mask */
 
       if ((method >= nMethods) || !(BI->cmd))
        res = E_SYSTEM_ERROR;
 
       if ((method >= nMethods) || !(BI->cmd))
        res = E_SYSTEM_ERROR;
@@ -4162,6 +4194,83 @@ form_driver(FORM *form, int c)
            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 : stdscr;
+      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)))
     {
       /*
   else if (!(c & (~(int)MAX_REGULAR_CHARACTER)))
     {
       /*
@@ -4228,15 +4337,6 @@ set_field_buffer(FIELD *field, int buffer, const char *value)
 
   len = Buffer_Length(field);
 
 
   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
   if (Growable(field))
     {
       /* for a growable field we must assume zero terminated strings, because
@@ -4251,14 +4351,6 @@ set_field_buffer(FIELD *field, int buffer, const char *value)
                                                     * field->cols))))
            RETURN(E_SYSTEM_ERROR);
 
                                                     * 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);
-           }
          len = vlen;
        }
     }
          len = vlen;
        }
     }
@@ -4271,16 +4363,29 @@ 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.
    */
    * 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, field->drows, field->dcols) == ERR)
+#endif
+    {
+      delwin(field->working);
+      field->working = newpad(field->drows, field->dcols);
+    }
+  len = Buffer_Length(field);
   wclear(field->working);
   mvwaddstr(field->working, 0, 0, value);
 
   wclear(field->working);
   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
     {
     {
       RETURN(E_SYSTEM_ERROR);
     }
   else
     {
-      mvwin_wchnstr(field->working, 0, 0, widevalue, (int)len);
+      for (i = 0; i < (unsigned)field->drows; ++i)
+       {
+         mvwin_wchnstr(field->working, i, 0,
+                       widevalue + (i * field->dcols),
+                       field->dcols);
+       }
       for (i = 0; i < len; ++i)
        {
          if (CharEq(myZEROS, widevalue[i]))
       for (i = 0; i < len; ++i)
        {
          if (CharEq(myZEROS, widevalue[i]))
@@ -4354,10 +4459,7 @@ field_buffer(const FIELD *field, int buffer)
              init_mb(state);
              next = _nc_wcrtomb(0, data[n].chars[0], &state);
              if (!isEILSEQ(next))
              init_mb(state);
              next = _nc_wcrtomb(0, data[n].chars[0], &state);
              if (!isEILSEQ(next))
-               {
-                 if (next != 0)
-                   need += next;
-               }
+               need += next;
            }
        }
 
            }
        }
 
@@ -4371,7 +4473,7 @@ field_buffer(const FIELD *field, int buffer)
        {
          wclear(field->working);
          mvwadd_wchnstr(field->working, 0, 0, data, size);
        {
          wclear(field->working);
          mvwadd_wchnstr(field->working, 0, 0, data, size);
-         mvwinnstr(field->working, 0, 0, result, (int)need + 1);
+         mvwinnstr(field->working, 0, 0, result, (int)need);
        }
 #else
       result = Address_Of_Nth_Buffer(field, buffer);
        }
 #else
       result = Address_Of_Nth_Buffer(field, buffer);