mirror of
https://github.com/Aigor44/ncursesw-morphos.git
synced 2024-12-27 07:49:06 +08:00
3a0d9d27e0
+ quiet some pedantic gcc warnings. + modify _nc_wgetch() to check for a -1 in the fifo, e.g., after a SIGWINCH, and discard that value, to avoid confusing application (patch by Eygene Ryabinkin, FreeBSD bin/136223).
341 lines
10 KiB
C
341 lines
10 KiB
C
/****************************************************************************
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* Copyright (c) 1998-2006,2009 Free Software Foundation, Inc. *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a *
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* copy of this software and associated documentation files (the *
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* "Software"), to deal in the Software without restriction, including *
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* without limitation the rights to use, copy, modify, merge, publish, *
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* distribute, distribute with modifications, sublicense, and/or sell *
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* copies of the Software, and to permit persons to whom the Software is *
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* furnished to do so, subject to the following conditions: *
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* *
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* The above copyright notice and this permission notice shall be included *
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* in all copies or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
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* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
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* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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* *
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* Except as contained in this notice, the name(s) of the above copyright *
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* holders shall not be used in advertising or otherwise to promote the *
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* sale, use or other dealings in this Software without prior written *
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* authorization. *
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****************************************************************************/
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/****************************************************************************
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* Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
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* and: Eric S. Raymond <esr@snark.thyrsus.com> *
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* and: Thomas E. Dickey 1996-on *
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* and: Juergen Pfeifer 2009 *
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****************************************************************************/
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/*
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* lib_pad.c
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* newpad -- create a new pad
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* pnoutrefresh -- refresh a pad, no update
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* pechochar -- add a char to a pad and refresh
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*/
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#include <curses.priv.h>
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MODULE_ID("$Id: lib_pad.c,v 1.45 2009/10/24 22:07:03 tom Exp $")
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NCURSES_EXPORT(WINDOW *)
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NCURSES_SP_NAME(newpad) (NCURSES_SP_DCLx int l, int c)
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{
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WINDOW *win;
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NCURSES_CH_T *ptr;
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int i;
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T((T_CALLED("newpad(%p,%d, %d)"), (void *) SP_PARM, l, c));
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if (l <= 0 || c <= 0)
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returnWin(0);
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win = NCURSES_SP_NAME(_nc_makenew) (NCURSES_SP_ARGx l, c, 0, 0, _ISPAD);
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if (win == NULL)
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returnWin(0);
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for (i = 0; i < l; i++) {
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if_USE_SCROLL_HINTS(win->_line[i].oldindex = _NEWINDEX);
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if ((win->_line[i].text = typeCalloc(NCURSES_CH_T, ((size_t) c))) == 0) {
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(void) _nc_freewin(win);
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returnWin(0);
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}
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for (ptr = win->_line[i].text; ptr < win->_line[i].text + c; ptr++)
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SetChar(*ptr, BLANK_TEXT, BLANK_ATTR);
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}
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returnWin(win);
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}
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#if NCURSES_SP_FUNCS
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NCURSES_EXPORT(WINDOW *)
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newpad(int l, int c)
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{
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return NCURSES_SP_NAME(newpad) (CURRENT_SCREEN, l, c);
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}
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#endif
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NCURSES_EXPORT(WINDOW *)
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subpad(WINDOW *orig, int l, int c, int begy, int begx)
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{
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WINDOW *win = (WINDOW *) 0;
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T((T_CALLED("subpad(%d, %d)"), l, c));
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if (orig) {
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if (!(orig->_flags & _ISPAD)
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|| ((win = derwin(orig, l, c, begy, begx)) == NULL))
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returnWin(0);
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}
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returnWin(win);
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}
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NCURSES_EXPORT(int)
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prefresh(WINDOW *win,
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int pminrow,
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int pmincol,
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int sminrow,
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int smincol,
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int smaxrow,
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int smaxcol)
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{
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#if NCURSES_SP_FUNCS
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SCREEN *sp = _nc_screen_of(win);
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#endif
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T((T_CALLED("prefresh()")));
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if (pnoutrefresh(win, pminrow, pmincol, sminrow, smincol, smaxrow,
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smaxcol) != ERR
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&& NCURSES_SP_NAME(doupdate) (NCURSES_SP_ARG) != ERR) {
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returnCode(OK);
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}
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returnCode(ERR);
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}
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NCURSES_EXPORT(int)
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pnoutrefresh(WINDOW *win,
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int pminrow,
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int pmincol,
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int sminrow,
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int smincol,
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int smaxrow,
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int smaxcol)
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{
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NCURSES_SIZE_T i, j;
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NCURSES_SIZE_T m, n;
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NCURSES_SIZE_T pmaxrow;
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NCURSES_SIZE_T pmaxcol;
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SCREEN *sp;
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#if USE_SCROLL_HINTS
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const int my_len = 2; /* parameterize the threshold for hardscroll */
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NCURSES_SIZE_T displaced;
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bool wide;
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#endif
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T((T_CALLED("pnoutrefresh(%p, %d, %d, %d, %d, %d, %d)"),
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(void *) win, pminrow, pmincol, sminrow, smincol, smaxrow, smaxcol));
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if (win == 0)
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returnCode(ERR);
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if (!(win->_flags & _ISPAD))
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returnCode(ERR);
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sp = _nc_screen_of(win);
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/* negative values are interpreted as zero */
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if (pminrow < 0)
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pminrow = 0;
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if (pmincol < 0)
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pmincol = 0;
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if (sminrow < 0)
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sminrow = 0;
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if (smincol < 0)
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smincol = 0;
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pmaxrow = pminrow + smaxrow - sminrow;
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pmaxcol = pmincol + smaxcol - smincol;
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T((" pminrow + smaxrow - sminrow %ld, win->_maxy %ld",
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(long) pmaxrow, (long) win->_maxy));
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T((" pmincol + smaxcol - smincol %ld, win->_maxx %ld",
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(long) pmaxcol, (long) win->_maxx));
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/*
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* Trim the caller's screen size back to the actual limits.
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*/
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if (pmaxrow > win->_maxy) {
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smaxrow -= (pmaxrow - win->_maxy);
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pmaxrow = pminrow + smaxrow - sminrow;
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}
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if (pmaxcol > win->_maxx) {
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smaxcol -= (pmaxcol - win->_maxx);
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pmaxcol = pmincol + smaxcol - smincol;
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}
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if (smaxrow >= screen_lines(sp)
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|| smaxcol >= screen_columns(sp)
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|| sminrow > smaxrow
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|| smincol > smaxcol)
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returnCode(ERR);
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T(("pad being refreshed"));
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#if USE_SCROLL_HINTS
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if (win->_pad._pad_y >= 0) {
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displaced = pminrow - win->_pad._pad_y
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- (sminrow - win->_pad._pad_top);
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T(("pad being shifted by %d line(s)", displaced));
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} else
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displaced = 0;
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#endif
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/*
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* For pure efficiency, we'd want to transfer scrolling information
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* from the pad to newscr whenever the window is wide enough that
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* its update will dominate the cost of the update for the horizontal
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* band of newscr that it occupies. Unfortunately, this threshold
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* tends to be complex to estimate, and in any case scrolling the
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* whole band and rewriting the parts outside win's image would look
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* really ugly. So. What we do is consider the pad "wide" if it
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* either (a) occupies the whole width of newscr, or (b) occupies
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* all but at most one column on either vertical edge of the screen
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* (this caters to fussy people who put boxes around full-screen
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* windows). Note that changing this formula will not break any code,
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* merely change the costs of various update cases.
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*/
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#if USE_SCROLL_HINTS
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wide = (smincol < my_len && smaxcol > (NewScreen(sp)->_maxx - my_len));
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#endif
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for (i = pminrow, m = sminrow + win->_yoffset;
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i <= pmaxrow && m <= NewScreen(sp)->_maxy;
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i++, m++) {
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register struct ldat *nline = &NewScreen(sp)->_line[m];
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register struct ldat *oline = &win->_line[i];
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for (j = pmincol, n = smincol; j <= pmaxcol; j++, n++) {
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NCURSES_CH_T ch = oline->text[j];
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#if USE_WIDEC_SUPPORT
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/*
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* Special case for leftmost character of the displayed area.
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* Only half of a double-width character may be visible.
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*/
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if (j == pmincol
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&& j > 0
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&& isWidecExt(ch)) {
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SetChar(ch, L(' '), AttrOf(oline->text[j - 1]));
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}
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#endif
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if (!CharEq(ch, nline->text[n])) {
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nline->text[n] = ch;
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CHANGED_CELL(nline, n);
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}
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}
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#if USE_SCROLL_HINTS
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if (wide) {
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int nind = m + displaced;
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if (oline->oldindex < 0
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|| nind < sminrow
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|| nind > smaxrow) {
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nind = _NEWINDEX;
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} else if (displaced) {
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register struct ldat *pline = &CurScreen(sp)->_line[nind];
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for (j = 0; j <= my_len; j++) {
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int k = NewScreen(sp)->_maxx - j;
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if (pline->text[j] != nline->text[j]
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|| pline->text[k] != nline->text[k]) {
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nind = _NEWINDEX;
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break;
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}
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}
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}
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nline->oldindex = nind;
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}
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#endif /* USE_SCROLL_HINTS */
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oline->firstchar = oline->lastchar = _NOCHANGE;
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if_USE_SCROLL_HINTS(oline->oldindex = i);
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}
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/*
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* Clean up debris from scrolling or resizing the pad, so we do not
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* accidentally pick up the index value during the next call to this
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* procedure. The only rows that should have an index value are those
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* that are displayed during this cycle.
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*/
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#if USE_SCROLL_HINTS
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for (i = pminrow - 1; (i >= 0) && (win->_line[i].oldindex >= 0); i--)
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win->_line[i].oldindex = _NEWINDEX;
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for (i = pmaxrow + 1; (i <= win->_maxy)
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&& (win->_line[i].oldindex >= 0); i++)
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win->_line[i].oldindex = _NEWINDEX;
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#endif
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win->_begx = smincol;
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win->_begy = sminrow;
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if (win->_clear) {
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win->_clear = FALSE;
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NewScreen(sp)->_clear = TRUE;
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}
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/*
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* Use the pad's current position, if it will be visible.
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* If not, don't do anything; it's not an error.
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*/
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if (win->_leaveok == FALSE
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&& win->_cury >= pminrow
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&& win->_curx >= pmincol
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&& win->_cury <= pmaxrow
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&& win->_curx <= pmaxcol) {
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NewScreen(sp)->_cury = win->_cury - pminrow + win->_begy + win->_yoffset;
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NewScreen(sp)->_curx = win->_curx - pmincol + win->_begx;
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}
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NewScreen(sp)->_leaveok = win->_leaveok;
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win->_flags &= ~_HASMOVED;
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/*
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* Update our cache of the line-numbers that we displayed from the pad.
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* We will use this on subsequent calls to this function to derive
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* values to stuff into 'oldindex[]' -- for scrolling optimization.
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*/
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win->_pad._pad_y = pminrow;
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win->_pad._pad_x = pmincol;
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win->_pad._pad_top = sminrow;
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win->_pad._pad_left = smincol;
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win->_pad._pad_bottom = smaxrow;
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win->_pad._pad_right = smaxcol;
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returnCode(OK);
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}
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NCURSES_EXPORT(int)
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pechochar(WINDOW *pad, const chtype ch)
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{
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T((T_CALLED("pechochar(%p, %s)"), (void *) pad, _tracechtype(ch)));
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if (pad == 0)
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returnCode(ERR);
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if (!(pad->_flags & _ISPAD))
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returnCode(wechochar(pad, ch));
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waddch(pad, ch);
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prefresh(pad, pad->_pad._pad_y,
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pad->_pad._pad_x,
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pad->_pad._pad_top,
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pad->_pad._pad_left,
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pad->_pad._pad_bottom,
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pad->_pad._pad_right);
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returnCode(OK);
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}
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