/****************************************************************************
- * Copyright (c) 1998,2000 Free Software Foundation, Inc. *
+ * Copyright 2020 Thomas E. Dickey *
+ * Copyright 1998-2010,2013 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 *
/****************************************************************************
* Author: Juergen Pfeifer, 1995,1997 *
- * Contact: http://www.familiepfeifer.de/Contact.aspx?Lang=en *
****************************************************************************/
#include "form.priv.h"
-MODULE_ID("$Id: frm_data.c,v 1.8 2002/07/06 15:33:27 juergen Exp $")
+MODULE_ID("$Id: frm_data.c,v 1.17 2020/02/02 23:34:34 tom Exp $")
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : bool data_behind(const FORM *form)
|
| Description : Check for off-screen data behind. This is nearly trivial
-| becose the begin of a field is fixed.
+| because the beginning of a field is fixed.
|
| Return Values : TRUE - there are off-screen data behind
| FALSE - there are no off-screen data behind
+--------------------------------------------------------------------------*/
NCURSES_EXPORT(bool)
-data_behind (const FORM *form)
+data_behind(const FORM *form)
{
bool result = FALSE;
+ T((T_CALLED("data_behind(%p)"), (const void *)form));
+
if (form && (form->status & _POSTED) && form->current)
{
FIELD *field;
field = form->current;
if (!Single_Line_Field(field))
{
- result = (form->toprow==0) ? FALSE : TRUE;
+ result = (form->toprow == 0) ? FALSE : TRUE;
}
else
{
- result = (form->begincol==0) ? FALSE : TRUE;
+ result = (form->begincol == 0) ? FALSE : TRUE;
}
}
- return(result);
+ returnBool(result);
}
/*---------------------------------------------------------------------------
| Facility : libnform
-| Function : static char * After_Last_Non_Pad_Position(
-| char *buffer,
+| Function : static char * Only_Padding(
+| WINDOW *w,
| int len,
| int pad)
|
-| Description : Find the last position in the buffer that doesn't
+| Description : Test if 'length' cells starting at the current position
| contain a padding character.
|
-| Return Values : The pointer to this position
+| Return Values : true if only padding cells are found
+--------------------------------------------------------------------------*/
-INLINE
-static char * After_Last_Non_Pad_Position(char *buffer, int len, int pad)
+NCURSES_INLINE static bool
+Only_Padding(WINDOW *w, int len, int pad)
{
- char *end = buffer + len;
-
- assert(buffer && len>=0);
- while ( (buffer < end) && (*(end-1)==pad) )
- end--;
+ bool result = TRUE;
+ int y, x, j;
+ FIELD_CELL cell;
- return end;
+ getyx(w, y, x);
+ for (j = 0; j < len; ++j)
+ {
+ if (wmove(w, y, x + j) != ERR)
+ {
+#if USE_WIDEC_SUPPORT
+ if (win_wch(w, &cell) != ERR)
+ {
+ if ((chtype)CharOf(cell) != ChCharOf(pad)
+ || cell.chars[1] != 0)
+ {
+ result = FALSE;
+ break;
+ }
+ }
+#else
+ cell = (FIELD_CELL) winch(w);
+ if (ChCharOf(cell) != ChCharOf(pad))
+ {
+ result = FALSE;
+ break;
+ }
+#endif
+ }
+ else
+ {
+ /* if an error, return true: no non-padding text found */
+ break;
+ }
+ }
+ /* no need to reset the cursor position; caller does this */
+ return result;
}
-#define SMALL_BUFFER_SIZE (80)
-
/*---------------------------------------------------------------------------
| Facility : libnform
| Function : bool data_ahead(const FORM *form)
| FALSE - there are no off-screen data ahead
+--------------------------------------------------------------------------*/
NCURSES_EXPORT(bool)
-data_ahead (const FORM *form)
+data_ahead(const FORM *form)
{
bool result = FALSE;
+ T((T_CALLED("data_ahead(%p)"), (const void *)form));
+
if (form && (form->status & _POSTED) && form->current)
{
- static char buffer[SMALL_BUFFER_SIZE + 1];
FIELD *field;
- bool large_buffer;
bool cursor_moved = FALSE;
- char *bp;
- char *found_content;
int pos;
field = form->current;
assert(form->w);
- large_buffer = (field->cols > SMALL_BUFFER_SIZE);
- if (large_buffer)
- bp = (char *)malloc((size_t)(field->cols) + 1);
- else
- bp = buffer;
-
- assert(bp);
-
if (Single_Line_Field(field))
{
int check_len;
while (pos < field->dcols)
{
check_len = field->dcols - pos;
- if ( check_len >= field->cols )
+ if (check_len >= field->cols)
check_len = field->cols;
cursor_moved = TRUE;
- wmove(form->w,0,pos);
- winnstr(form->w,bp,check_len);
- found_content =
- After_Last_Non_Pad_Position(bp,check_len,field->pad);
- if (found_content==bp)
- pos += field->cols;
+ wmove(form->w, 0, pos);
+ if (Only_Padding(form->w, check_len, field->pad))
+ pos += field->cols;
else
{
result = TRUE;
while (pos < field->drows)
{
cursor_moved = TRUE;
- wmove(form->w,pos,0);
+ wmove(form->w, pos, 0);
pos++;
- winnstr(form->w,bp,field->cols);
- found_content =
- After_Last_Non_Pad_Position(bp,field->cols,field->pad);
- if (found_content!=bp)
+ if (!Only_Padding(form->w, field->cols, field->pad))
{
result = TRUE;
break;
}
}
- if (large_buffer)
- free(bp);
-
if (cursor_moved)
- wmove(form->w,form->currow,form->curcol);
+ wmove(form->w, form->currow, form->curcol);
}
- return(result);
+ returnBool(result);
}
/* frm_data.c ends here */
projects / ncurses.git / blobdiff