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Diffstat (limited to 'lib/libcurses/lib_newwin.c')
-rw-r--r--lib/libcurses/lib_newwin.c162
1 files changed, 114 insertions, 48 deletions
diff --git a/lib/libcurses/lib_newwin.c b/lib/libcurses/lib_newwin.c
index 0fd8d16db36..66269e31638 100644
--- a/lib/libcurses/lib_newwin.c
+++ b/lib/libcurses/lib_newwin.c
@@ -28,63 +28,94 @@
**
*/
-#include "curses.priv.h"
-#include <stdlib.h>
+#include <curses.priv.h>
+
+MODULE_ID("Id: lib_newwin.c,v 1.17 1997/02/15 21:46:05 tom Exp $")
+
+void _nc_freewin(WINDOW *win)
+{
+WINDOWLIST *p, *q;
+int i;
+
+ if (win != 0) {
+ for (p = _nc_windows, q = 0; p != 0; q = p, p = p->next) {
+ if (p->win == win) {
+ if (q == 0)
+ _nc_windows = p->next;
+ else
+ q->next = p->next;
+ free(p);
+
+ if (! (win->_flags & _SUBWIN)) {
+ for (i = 0; i <= win->_maxy && win->_line[i].text; i++)
+ free(win->_line[i].text);
+ }
+ free(win->_line);
+ free(win);
+
+ if (win == curscr) curscr = 0;
+ if (win == stdscr) stdscr = 0;
+ if (win == newscr) newscr = 0;
+
+ T(("...deleted win=%p", win));
+ break;
+ }
+ }
+ }
+}
WINDOW * newwin(int num_lines, int num_columns, int begy, int begx)
{
WINDOW *win;
chtype *ptr;
-int i, j;
+int i;
+
+ T((T_CALLED("newwin(%d,%d,%d,%d)"), num_lines, num_columns, begy, begx));
- T(("newwin(%d,%d,%d,%d) called", num_lines, num_columns, begy, begx));
+ if (begy < 0 || begx < 0 || num_lines < 0 || num_columns < 0)
+ returnWin(0);
if (num_lines == 0)
- num_lines = screen_lines - begy;
+ num_lines = SP->_lines_avail - begy;
if (num_columns == 0)
num_columns = screen_columns - begx;
- if (num_columns + begx > SP->_columns || num_lines + begy > SP->_lines)
- return NULL;
+ if (num_columns + begx > SP->_columns || num_lines + begy > SP->_lines_avail)
+ returnWin(0);
- if ((win = _nc_makenew(num_lines, num_columns, begy, begx)) == NULL)
- return NULL;
+ if ((win = _nc_makenew(num_lines, num_columns, begy, begx, 0)) == 0)
+ returnWin(0);
for (i = 0; i < num_lines; i++) {
- if ((win->_line[i].text = (chtype *) calloc((unsigned)num_columns, sizeof(chtype))) == NULL) {
- for (j = 0; j < i; j++)
- free(win->_line[j].text);
-
- free(win->_line);
- free(win);
-
- return NULL;
+ if ((win->_line[i].text = typeCalloc(chtype, (unsigned)num_columns)) == 0) {
+ _nc_freewin(win);
+ returnWin(0);
}
- else
- for (ptr = win->_line[i].text; ptr < win->_line[i].text + num_columns; )
- *ptr++ = ' ';
+ for (ptr = win->_line[i].text; ptr < win->_line[i].text + num_columns; )
+ *ptr++ = ' ';
}
T(("newwin: returned window is %p", win));
- return(win);
+ returnWin(win);
}
WINDOW * derwin(WINDOW *orig, int num_lines, int num_columns, int begy, int begx)
{
WINDOW *win;
int i;
+int flags = _SUBWIN;
- T(("derwin(%p, %d,%d,%d,%d) called", orig, num_lines, num_columns, begy, begx));
+ T((T_CALLED("derwin(%p,%d,%d,%d,%d)"), orig, num_lines, num_columns, begy, begx));
/*
** make sure window fits inside the original one
*/
- if ( begy < 0 || begx < 0)
- return NULL;
+ if ( begy < 0 || begx < 0 || orig == 0 || num_lines < 0 || num_columns < 0)
+ returnWin(0);
if ( begy + num_lines > orig->_maxy + 1
|| begx + num_columns > orig->_maxx + 1)
- return NULL;
+ returnWin(0);
if (num_lines == 0)
num_lines = orig->_maxy - begy;
@@ -92,8 +123,11 @@ int i;
if (num_columns == 0)
num_columns = orig->_maxx - begx;
- if ((win = _nc_makenew(num_lines, num_columns, orig->_begy + begy, orig->_begx + begx)) == NULL)
- return NULL;
+ if (orig->_flags & _ISPAD)
+ flags |= _ISPAD;
+
+ if ((win = _nc_makenew(num_lines, num_columns, orig->_begy + begy, orig->_begx + begx, flags)) == 0)
+ returnWin(0);
win->_pary = begy;
win->_parx = begx;
@@ -103,40 +137,44 @@ int i;
for (i = 0; i < num_lines; i++)
win->_line[i].text = &orig->_line[begy++].text[begx];
- win->_flags = _SUBWIN;
win->_parent = orig;
T(("derwin: returned window is %p", win));
- return(win);
+ returnWin(win);
}
WINDOW *subwin(WINDOW *w, int l, int c, int y, int x)
{
- T(("subwin(%p, %d, %d, %d, %d) called", w, l, c, y, x));
+ T((T_CALLED("subwin(%p, %d, %d, %d, %d)"), w, l, c, y, x));
T(("parent has begy = %d, begx = %d", w->_begy, w->_begx));
- return derwin(w, l, c, y - w->_begy, x - w->_begx);
+ returnWin(derwin(w, l, c, y - w->_begy, x - w->_begx));
}
WINDOW *
-_nc_makenew(int num_lines, int num_columns, int begy, int begx)
+_nc_makenew(int num_lines, int num_columns, int begy, int begx, int flags)
{
int i;
+WINDOWLIST *wp;
WINDOW *win;
+bool is_pad = (flags & _ISPAD);
T(("_nc_makenew(%d,%d,%d,%d)", num_lines, num_columns, begy, begx));
if (num_lines <= 0 || num_columns <= 0)
- return NULL;
+ return 0;
- if ((win = (WINDOW *) calloc(1, sizeof(WINDOW))) == NULL)
- return NULL;
+ if ((wp = typeCalloc(WINDOWLIST, 1)) == 0)
+ return 0;
- if ((win->_line = (struct ldat *) calloc((unsigned)num_lines, sizeof (struct ldat))) == NULL) {
+ if ((win = typeCalloc(WINDOW, 1)) == 0)
+ return 0;
+
+ if ((win->_line = typeCalloc(struct ldat, ((unsigned)num_lines))) == 0) {
free(win);
- return NULL;
+ return 0;
}
win->_curx = 0;
@@ -145,23 +183,24 @@ WINDOW *win;
win->_maxx = num_columns - 1;
win->_begy = begy;
win->_begx = begx;
+ win->_yoffset = SP->_topstolen;
- win->_flags = 0;
+ win->_flags = flags;
win->_attrs = A_NORMAL;
- win->_bkgd = A_NORMAL;
+ win->_bkgd = BLANK;
- win->_clear = (num_lines == screen_lines && num_columns == screen_columns);
+ win->_clear = is_pad ? FALSE : (num_lines == screen_lines && num_columns == screen_columns);
win->_idlok = FALSE;
win->_idcok = TRUE;
win->_scroll = FALSE;
win->_leaveok = FALSE;
win->_use_keypad = FALSE;
- win->_delay = -1;
- win->_immed = FALSE;
- win->_sync = 0;
- win->_parx = -1;
- win->_pary = -1;
- win->_parent = (WINDOW *)NULL;
+ win->_delay = -1;
+ win->_immed = FALSE;
+ win->_sync = 0;
+ win->_parx = -1;
+ win->_pary = -1;
+ win->_parent = 0;
win->_regtop = 0;
win->_regbottom = num_lines - 1;
@@ -175,11 +214,32 @@ WINDOW *win;
for (i = 0; i < num_lines; i++)
{
- win->_line[i].firstchar = win->_line[i].lastchar = _NOCHANGE;
+ /*
+ * This used to do
+ *
+ * win->_line[i].firstchar = win->_line[i].lastchar = _NOCHANGE;
+ *
+ * which marks the whole window unchanged. That's how
+ * SVr1 curses did it, but SVr4 curses marks the whole new
+ * window changed.
+ *
+ * With the old SVr1-like code, say you have stdscr full of
+ * characters, then create a new window with newwin(),
+ * then do a printw(win, "foo ");, the trailing spaces are
+ * completely ignored by the following refreshes. So, you
+ * get "foojunkjunk" on the screen instead of "foo " as
+ * you actually intended.
+ *
+ * SVr4 doesn't do this. Instead the spaces are actually written.
+ * So that's how we want ncurses to behave.
+ */
+ win->_line[i].firstchar = 0;
+ win->_line[i].lastchar = num_columns-1;
+
win->_line[i].oldindex = i;
}
- if (begx + num_columns == screen_columns) {
+ if (!is_pad && (begx + num_columns == screen_columns)) {
win->_flags |= _ENDLINE;
if (begx == 0 && num_lines == screen_lines && begy == 0)
@@ -189,5 +249,11 @@ WINDOW *win;
win->_flags |= _SCROLLWIN;
}
+ wp->next = _nc_windows;
+ wp->win = win;
+ _nc_windows = wp;
+
+ T((T_CREATE("window %p"), win));
+
return(win);
}
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