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Diffstat (limited to 'lib/libcurses/base/wresize.c')
| -rw-r--r-- | lib/libcurses/base/wresize.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/lib/libcurses/base/wresize.c b/lib/libcurses/base/wresize.c new file mode 100644 index 00000000000..47ed197ca62 --- /dev/null +++ b/lib/libcurses/base/wresize.c @@ -0,0 +1,168 @@ +/* $OpenBSD: wresize.c,v 1.1 1999/01/18 19:10:08 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: Thomas E. Dickey <dickey@clark.net> 1996,1997 * + ****************************************************************************/ + +#include <curses.priv.h> + +MODULE_ID("$From: wresize.c,v 1.11 1998/10/12 12:24:40 Alexander.V.Lukyanov Exp $") + +/* + * Reallocate a curses WINDOW struct to either shrink or grow to the specified + * new lines/columns. If it grows, the new character cells are filled with + * blanks. The application is responsible for repainting the blank area. + */ + +#define DOALLOC(p,t,n) (t *)_nc_doalloc(p, sizeof(t)*(n)) +#define ld_ALLOC(p,n) DOALLOC(p,struct ldat,n) +#define c_ALLOC(p,n) DOALLOC(p,chtype,n) + +int +wresize(WINDOW *win, int ToLines, int ToCols) +{ + register int row; + int size_x, size_y; + struct ldat *pline; + chtype blank; + +#ifdef TRACE + T((T_CALLED("wresize(%p,%d,%d)"), win, ToLines, ToCols)); + if (win) { + TR(TRACE_UPDATE, ("...beg (%d, %d), max(%d,%d), reg(%d,%d)", + win->_begy, win->_begx, + win->_maxy, win->_maxx, + win->_regtop, win->_regbottom)); + if (_nc_tracing & TRACE_UPDATE) + _tracedump("...before", win); + } +#endif + + if (!win || --ToLines < 0 || --ToCols < 0) + returnCode(ERR); + + size_x = win->_maxx; + size_y = win->_maxy; + + if (ToLines == size_y + && ToCols == size_x) + returnCode(OK); + + pline = (win->_flags & _SUBWIN) ? win->_parent->_line : 0; + + /* + * If the number of lines has changed, adjust the size of the overall + * vector: + */ + if (ToLines != size_y) { + if (! (win->_flags & _SUBWIN)) { + for (row = ToLines+1; row <= size_y; row++) + free((char *)(win->_line[row].text)); + } + + win->_line = ld_ALLOC(win->_line, ToLines+1); + if (win->_line == 0) + returnCode(ERR); + + for (row = size_y+1; row <= ToLines; row++) { + win->_line[row].text = 0; + win->_line[row].firstchar = 0; + win->_line[row].lastchar = ToCols; + if ((win->_flags & _SUBWIN)) { + win->_line[row].text = + &pline[win->_begy + row].text[win->_begx]; + } + } + } + + /* + * Adjust the width of the columns: + */ + blank = _nc_background(win); + for (row = 0; row <= ToLines; row++) { + chtype *s = win->_line[row].text; + int begin = (s == 0) ? 0 : size_x + 1; + int end = ToCols; + + if_USE_SCROLL_HINTS(win->_line[row].oldindex = row); + + if (ToCols != size_x || s == 0) { + if (! (win->_flags & _SUBWIN)) { + win->_line[row].text = s = c_ALLOC(s, ToCols+1); + if (win->_line[row].text == 0) + returnCode(ERR); + } else if (s == 0) { + win->_line[row].text = s = + &pline[win->_begy + row].text[win->_begx]; + } + + if (end >= begin) { /* growing */ + if (win->_line[row].firstchar < begin) + win->_line[row].firstchar = begin; + win->_line[row].lastchar = ToCols; + do { + s[end] = blank; + } while (--end >= begin); + } else { /* shrinking */ + win->_line[row].firstchar = 0; + win->_line[row].lastchar = ToCols; + } + } + } + + /* + * Finally, adjust the parameters showing screen size and cursor + * position: + */ + win->_maxx = ToCols; + win->_maxy = ToLines; + + if (win->_regtop > win->_maxy) + win->_regtop = win->_maxy; + if (win->_regbottom > win->_maxy + || win->_regbottom == size_y) + win->_regbottom = win->_maxy; + + if (win->_curx > win->_maxx) + win->_curx = win->_maxx; + if (win->_cury > win->_maxy) + win->_cury = win->_maxy; + +#ifdef TRACE + TR(TRACE_UPDATE, ("...beg (%d, %d), max(%d,%d), reg(%d,%d)", + win->_begy, win->_begx, + win->_maxy, win->_maxx, + win->_regtop, win->_regbottom)); + if (_nc_tracing & TRACE_UPDATE) + _tracedump("...after:", win); +#endif + returnCode(OK); +} |