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+/****************************************************************************
+ * Copyright (c) 1998-2007,2008 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 *
+ * "Software"), to deal in the Software without restriction, including *
+ * without limitation the rights to use, copy, modify, merge, publish, *
+ * distribute, distribute with modifications, sublicense, and/or sell *
+ * copies of the Software, and to permit persons to whom the Software is *
+ * furnished to do so, subject to the following conditions: *
+ * *
+ * The above copyright notice and this permission notice shall be included *
+ * in all copies or substantial portions of the Software. *
+ * *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
+ * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
+ * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
+ * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
+ * *
+ * Except as contained in this notice, the name(s) of the above copyright *
+ * holders shall not be used in advertising or otherwise to promote the *
+ * sale, use or other dealings in this Software without prior written *
+ * authorization. *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
+ * and: Eric S. Raymond <esr@snark.thyrsus.com> *
+ * and: Thomas E. Dickey 1996-on *
+ ****************************************************************************/
+
+/*
+** lib_newwin.c
+**
+** The routines newwin(), subwin() and their dependent
+**
+*/
+
+#include <curses.priv.h>
+#include <stddef.h>
+
+MODULE_ID("$Id: lib_newwin.c,v 1.50 2008/05/03 16:36:39 tom Exp $")
+
+#define window_is(name) ((sp)->_##name == win)
+
+#if USE_REENTRANT
+#define remove_window(name) \
+ sp->_##name = 0
+#else
+#define remove_window(name) \
+ sp->_##name = 0; \
+ if (win == name) \
+ name = 0
+#endif
+
+static void
+remove_window_from_screen(WINDOW *win)
+{
+ SCREEN *sp;
+
+ for (each_screen(sp)) {
+ if (window_is(curscr)) {
+ remove_window(curscr);
+ break;
+ } else if (window_is(stdscr)) {
+ remove_window(stdscr);
+ break;
+ } else if (window_is(newscr)) {
+ remove_window(newscr);
+ break;
+ }
+ }
+}
+
+NCURSES_EXPORT(int)
+_nc_freewin(WINDOW *win)
+{
+ WINDOWLIST *p, *q;
+ int i;
+ int result = ERR;
+
+ T((T_CALLED("_nc_freewin(%p)"), win));
+
+ if (win != 0) {
+ if (_nc_try_global(windowlist) == 0) {
+ q = 0;
+ for (each_window(p)) {
+ if (&(p->win) == win) {
+ remove_window_from_screen(win);
+ if (q == 0)
+ _nc_windows = p->next;
+ else
+ q->next = p->next;
+
+ if (!(win->_flags & _SUBWIN)) {
+ for (i = 0; i <= win->_maxy; i++)
+ FreeIfNeeded(win->_line[i].text);
+ }
+ free(win->_line);
+ free(p);
+
+ result = OK;
+ T(("...deleted win=%p", win));
+ break;
+ }
+ q = p;
+ }
+ _nc_unlock_global(windowlist);
+ }
+ }
+ returnCode(result);
+}
+
+NCURSES_EXPORT(WINDOW *)
+newwin(int num_lines, int num_columns, int begy, int begx)
+{
+ WINDOW *win;
+ NCURSES_CH_T *ptr;
+ int i;
+
+ T((T_CALLED("newwin(%d,%d,%d,%d)"), 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 = SP->_lines_avail - begy;
+ if (num_columns == 0)
+ num_columns = screen_columns - begx;
+
+ if ((win = _nc_makenew(num_lines, num_columns, begy, begx, 0)) == 0)
+ returnWin(0);
+
+ for (i = 0; i < num_lines; i++) {
+ win->_line[i].text = typeCalloc(NCURSES_CH_T, (unsigned) num_columns);
+ if (win->_line[i].text == 0) {
+ (void) _nc_freewin(win);
+ returnWin(0);
+ }
+ for (ptr = win->_line[i].text;
+ ptr < win->_line[i].text + num_columns;
+ ptr++)
+ SetChar(*ptr, BLANK_TEXT, BLANK_ATTR);
+ }
+
+ returnWin(win);
+}
+
+NCURSES_EXPORT(WINDOW *)
+derwin(WINDOW *orig, int num_lines, int num_columns, int begy, int begx)
+{
+ WINDOW *win;
+ int i;
+ int flags = _SUBWIN;
+
+ 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 || orig == 0 || num_lines < 0 || num_columns < 0)
+ returnWin(0);
+ if (begy + num_lines > orig->_maxy + 1
+ || begx + num_columns > orig->_maxx + 1)
+ returnWin(0);
+
+ if (num_lines == 0)
+ num_lines = orig->_maxy + 1 - begy;
+
+ if (num_columns == 0)
+ num_columns = orig->_maxx + 1 - begx;
+
+ 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;
+ WINDOW_ATTRS(win) = WINDOW_ATTRS(orig);
+ win->_nc_bkgd = orig->_nc_bkgd;
+
+ for (i = 0; i < num_lines; i++)
+ win->_line[i].text = &orig->_line[begy++].text[begx];
+
+ win->_parent = orig;
+
+ returnWin(win);
+}
+
+NCURSES_EXPORT(WINDOW *)
+subwin(WINDOW *w, int l, int c, int y, int x)
+{
+ T((T_CALLED("subwin(%p, %d, %d, %d, %d)"), w, l, c, y, x));
+ T(("parent has begy = %ld, begx = %ld", (long) w->_begy, (long) w->_begx));
+
+ returnWin(derwin(w, l, c, y - w->_begy, x - w->_begx));
+}
+
+static bool
+dimension_limit(int value)
+{
+ NCURSES_SIZE_T test = value;
+ return (test == value && value > 0);
+}
+
+NCURSES_EXPORT(WINDOW *)
+_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((T_CALLED("_nc_makenew(%d,%d,%d,%d)"), num_lines, num_columns, begy, begx));
+
+ if (SP == 0)
+ returnWin(0);
+
+ if (!dimension_limit(num_lines) || !dimension_limit(num_columns))
+ returnWin(0);
+
+ if ((wp = typeCalloc(WINDOWLIST, 1)) == 0)
+ returnWin(0);
+
+ _nc_mutex_init(&(wp->mutex_use_window));
+
+ win = &(wp->win);
+
+ if ((win->_line = typeCalloc(struct ldat, ((unsigned) num_lines))) == 0) {
+ free(win);
+ returnWin(0);
+ }
+
+ _nc_lock_global(windowlist);
+
+ win->_curx = 0;
+ win->_cury = 0;
+ win->_maxy = num_lines - 1;
+ win->_maxx = num_columns - 1;
+ win->_begy = begy;
+ win->_begx = begx;
+ win->_yoffset = SP->_topstolen;
+
+ win->_flags = flags;
+ WINDOW_ATTRS(win) = A_NORMAL;
+ SetChar(win->_nc_bkgd, BLANK_TEXT, BLANK_ATTR);
+
+ 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 = 0;
+
+ win->_regtop = 0;
+ win->_regbottom = num_lines - 1;
+
+ win->_pad._pad_y = -1;
+ win->_pad._pad_x = -1;
+ win->_pad._pad_top = -1;
+ win->_pad._pad_bottom = -1;
+ win->_pad._pad_left = -1;
+ win->_pad._pad_right = -1;
+
+ for (i = 0; i < num_lines; i++) {
+ /*
+ * 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;
+
+ if_USE_SCROLL_HINTS(win->_line[i].oldindex = i);
+ }
+
+ if (!is_pad && (begx + num_columns == screen_columns)) {
+ win->_flags |= _ENDLINE;
+
+ if (begx == 0 && num_lines == screen_lines && begy == 0)
+ win->_flags |= _FULLWIN;
+
+ if (begy + num_lines == screen_lines)
+ win->_flags |= _SCROLLWIN;
+ }
+
+ wp->next = _nc_windows;
+ _nc_windows = wp;
+
+ T((T_CREATE("window %p"), win));
+
+ _nc_unlock_global(windowlist);
+ returnWin(win);
+}