From 2ab6a45cb794e8f5ff7b3d8c9fe25b0ef0f5b669 Mon Sep 17 00:00:00 2001 From: "Todd C. Miller" Date: Mon, 18 Jan 1999 19:10:28 +0000 Subject: ncurses-4.2-990116 --- lib/libcurses/base/lib_newwin.c | 273 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 273 insertions(+) create mode 100644 lib/libcurses/base/lib_newwin.c (limited to 'lib/libcurses/base/lib_newwin.c') diff --git a/lib/libcurses/base/lib_newwin.c b/lib/libcurses/base/lib_newwin.c new file mode 100644 index 00000000000..db0df629fff --- /dev/null +++ b/lib/libcurses/base/lib_newwin.c @@ -0,0 +1,273 @@ +/* $OpenBSD: lib_newwin.c,v 1.1 1999/01/18 19:09:54 millert Exp $ */ + +/**************************************************************************** + * Copyright (c) 1998 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 1992,1995 * + * and: Eric S. Raymond * + ****************************************************************************/ + + + +/* +** lib_newwin.c +** +** The routines newwin(), subwin() and their dependent +** +*/ + +#include + +MODULE_ID("$From: lib_newwin.c,v 1.20 1998/05/23 23:21:32 Alexander.V.Lukyanov 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; + + 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 (num_columns + begx > SP->_columns || num_lines + begy > SP->_lines_avail) + returnWin(0); + + 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 = typeCalloc(chtype, (unsigned)num_columns)) == 0) { + _nc_freewin(win); + returnWin(0); + } + for (ptr = win->_line[i].text; ptr < win->_line[i].text + num_columns; ) + *ptr++ = ' '; + } + + T(("newwin: returned window is %p", 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((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; + win->_attrs = orig->_attrs; + win->_bkgd = orig->_bkgd; + + for (i = 0; i < num_lines; i++) + win->_line[i].text = &orig->_line[begy++].text[begx]; + + win->_parent = orig; + + T(("derwin: returned window is %p", win)); + + returnWin(win); +} + + +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 = %d, begx = %d", w->_begy, 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, 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 0; + + if ((wp = typeCalloc(WINDOWLIST, 1)) == 0) + return 0; + + if ((win = typeCalloc(WINDOW, 1)) == 0) + return 0; + + if ((win->_line = typeCalloc(struct ldat, ((unsigned)num_lines))) == 0) { + free(win); + return 0; + } + + 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; + win->_attrs = A_NORMAL; + win->_bkgd = BLANK; + + 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; + wp->win = win; + _nc_windows = wp; + + T((T_CREATE("window %p"), win)); + + return(win); +} -- cgit v1.2.3