diff options
Diffstat (limited to 'ncurses-5.2/ncurses/base/resizeterm.c')
| -rw-r--r-- | ncurses-5.2/ncurses/base/resizeterm.c | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/ncurses-5.2/ncurses/base/resizeterm.c b/ncurses-5.2/ncurses/base/resizeterm.c new file mode 100644 index 0000000..ecc8cf7 --- /dev/null +++ b/ncurses-5.2/ncurses/base/resizeterm.c @@ -0,0 +1,121 @@ +/**************************************************************************** + * 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: Thomas E. Dickey <dickey@clark.net> 1996,1997 * + ****************************************************************************/ + +/* + * This is an extension to the curses library. It provides callers with a hook + * into the NCURSES data to resize windows, primarily for use by programs + * running in an X Window terminal (e.g., xterm). I abstracted this module + * from my application library for NCURSES because it must be compiled with + * the private data structures -- T.Dickey 1995/7/4. + */ + +#include <curses.priv.h> +#include <term.h> + +MODULE_ID("$Id$") + +/* + * This function reallocates NCURSES window structures. It is invoked in + * response to a SIGWINCH interrupt. Other user-defined windows may also need + * to be reallocated. + * + * Because this performs memory allocation, it should not (in general) be + * invoked directly from the signal handler. + */ +int +resizeterm(int ToLines, int ToCols) +{ + int stolen = screen_lines - SP->_lines_avail; + int bottom = screen_lines + SP->_topstolen - stolen; + + T((T_CALLED("resizeterm(%d,%d) old(%d,%d)"), + ToLines, ToCols, + screen_lines, screen_columns)); + + SP->_sig_winch = FALSE; + + if (ToLines != screen_lines + || ToCols != screen_columns) { + WINDOWLIST *wp; + +#if USE_SIGWINCH + ungetch(KEY_RESIZE); /* so application can know this */ + clearok(curscr, TRUE); /* screen contents are unknown */ +#endif + + for (wp = _nc_windows; wp != 0; wp = wp->next) { + WINDOW *win = wp->win; + int myLines = win->_maxy + 1; + int myCols = win->_maxx + 1; + + /* pads aren't treated this way */ + if (win->_flags & _ISPAD) + continue; + + if (win->_begy >= bottom) { + win->_begy += (ToLines - screen_lines); + } else { + if (myLines == screen_lines - stolen + && ToLines != screen_lines) + myLines = ToLines - stolen; + else + if (myLines == screen_lines + && ToLines != screen_lines) + myLines = ToLines; + } + + if (myCols == screen_columns + && ToCols != screen_columns) + myCols = ToCols; + + if (wresize(win, myLines, myCols) != OK) + returnCode(ERR); + } + + screen_lines = lines = ToLines; + screen_columns = columns = ToCols; + + SP->_lines_avail = lines - stolen; + + if (SP->oldhash) { FreeAndNull(SP->oldhash); } + if (SP->newhash) { FreeAndNull(SP->newhash); } + } + + /* + * Always update LINES, to allow for call from lib_doupdate.c which + * needs to have the count adjusted by the stolen (ripped off) lines. + */ + LINES = ToLines - stolen; + COLS = ToCols; + + returnCode(OK); +} |