+++ /dev/null
-/****************************************************************************
- * 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 <zmbenhal@netcom.com> 1992,1995 *
- * and: Eric S. Raymond <esr@snark.thyrsus.com> *
- ****************************************************************************/
-
-
-/*
- * lib_pad.c
- * newpad -- create a new pad
- * pnoutrefresh -- refresh a pad, no update
- * pechochar -- add a char to a pad and refresh
- */
-
-#include <curses.priv.h>
-
-MODULE_ID("$Id: lib_pad.c,v 1.25 1998/02/11 12:13:55 tom Exp $")
-
-WINDOW *newpad(int l, int c)
-{
-WINDOW *win;
-chtype *ptr;
-int i;
-
- T((T_CALLED("newpad(%d, %d)"), l, c));
-
- if (l <= 0 || c <= 0)
- returnWin(0);
-
- if ((win = _nc_makenew(l,c,0,0,_ISPAD)) == NULL)
- returnWin(0);
-
- for (i = 0; i < l; i++) {
- if_USE_SCROLL_HINTS(win->_line[i].oldindex = _NEWINDEX);
- if ((win->_line[i].text = typeCalloc(chtype, ((size_t)c))) == 0) {
- _nc_freewin(win);
- returnWin(0);
- }
- for (ptr = win->_line[i].text; ptr < win->_line[i].text + c; )
- *ptr++ = ' ';
- }
-
- returnWin(win);
-}
-
-WINDOW *subpad(WINDOW *orig, int l, int c, int begy, int begx)
-{
-WINDOW *win = (WINDOW *)0;
-
- T((T_CALLED("subpad(%d, %d)"), l, c));
-
- if (orig) {
- if (!(orig->_flags & _ISPAD) || ((win = derwin(orig, l, c, begy, begx)) == NULL))
- returnWin(0);
- }
- returnWin(win);
-}
-
-int prefresh(WINDOW *win, int pminrow, int pmincol,
- int sminrow, int smincol, int smaxrow, int smaxcol)
-{
- T((T_CALLED("prefresh()")));
- if (pnoutrefresh(win, pminrow, pmincol, sminrow, smincol, smaxrow, smaxcol) != ERR
- && doupdate() != ERR) {
- returnCode(OK);
- }
- returnCode(ERR);
-}
-
-int pnoutrefresh(WINDOW *win, int pminrow, int pmincol,
- int sminrow, int smincol, int smaxrow, int smaxcol)
-{
-const int my_len = 2; /* parameterize the threshold for hardscroll */
-short i, j;
-short m, n;
-short pmaxrow;
-short pmaxcol;
-short displaced;
-bool wide;
-
- T((T_CALLED("pnoutrefresh(%p, %d, %d, %d, %d, %d, %d)"),
- win, pminrow, pmincol, sminrow, smincol, smaxrow, smaxcol));
-
- if (win == 0)
- returnCode(ERR);
-
- if (!(win->_flags & _ISPAD))
- returnCode(ERR);
-
- /* negative values are interpreted as zero */
- if (pminrow < 0) pminrow = 0;
- if (pmincol < 0) pmincol = 0;
- if (sminrow < 0) sminrow = 0;
- if (smincol < 0) smincol = 0;
-
- pmaxrow = pminrow + smaxrow - sminrow;
- pmaxcol = pmincol + smaxcol - smincol;
-
- T((" pminrow + smaxrow - sminrow %d, win->_maxy %d", pmaxrow, win->_maxy));
- T((" pmincol + smaxcol - smincol %d, win->_maxx %d", pmaxcol, win->_maxx));
-
- /*
- * Trim the caller's screen size back to the actual limits.
- */
- if (pmaxrow > win->_maxy) {
- smaxrow -= (pmaxrow - win->_maxy);
- pmaxrow = pminrow + smaxrow - sminrow;
- }
- if (pmaxcol > win->_maxx) {
- smaxcol -= (pmaxcol - win->_maxx);
- pmaxcol = pmincol + smaxcol - smincol;
- }
-
- if (smaxrow > screen_lines
- || smaxcol > screen_columns
- || sminrow > smaxrow
- || smincol > smaxcol)
- returnCode(ERR);
-
- T(("pad being refreshed"));
-
- if (win->_pad._pad_y >= 0) {
- displaced = pminrow - win->_pad._pad_y
- -(sminrow - win->_pad._pad_top);
- T(("pad being shifted by %d line(s)", displaced));
- } else
- displaced = 0;
-
- /*
- * For pure efficiency, we'd want to transfer scrolling information
- * from the pad to newscr whenever the window is wide enough that
- * its update will dominate the cost of the update for the horizontal
- * band of newscr that it occupies. Unfortunately, this threshold
- * tends to be complex to estimate, and in any case scrolling the
- * whole band and rewriting the parts outside win's image would look
- * really ugly. So. What we do is consider the pad "wide" if it
- * either (a) occupies the whole width of newscr, or (b) occupies
- * all but at most one column on either vertical edge of the screen
- * (this caters to fussy people who put boxes around full-screen
- * windows). Note that changing this formula will not break any code,
- * merely change the costs of various update cases.
- */
- wide = (smincol < my_len && smaxcol > (newscr->_maxx - my_len));
-
- for (i = pminrow, m = sminrow + win->_yoffset;
- i <= pmaxrow && m <= newscr->_maxy;
- i++, m++) {
- register struct ldat *nline = &newscr->_line[m];
- register struct ldat *oline = &win->_line[i];
-
- for (j = pmincol, n = smincol; j <= pmaxcol; j++, n++) {
- if (oline->text[j] != nline->text[n]) {
- nline->text[n] = oline->text[j];
-
- if (nline->firstchar == _NOCHANGE)
- nline->firstchar = nline->lastchar = n;
- else if (n < nline->firstchar)
- nline->firstchar = n;
- else if (n > nline->lastchar)
- nline->lastchar = n;
- }
- }
-
-#if USE_SCROLL_HINTS
- if (wide) {
- int nind = m + displaced;
- if (oline->oldindex < 0
- || nind < sminrow
- || nind > smaxrow) {
- nind = _NEWINDEX;
- } else if (displaced) {
- register struct ldat *pline = &curscr->_line[nind];
- for (j = 0; j <= my_len; j++) {
- int k = newscr->_maxx - j;
- if (pline->text[j] != nline->text[j]
- || pline->text[k] != nline->text[k]) {
- nind = _NEWINDEX;
- break;
- }
- }
- }
-
- nline->oldindex = nind;
- }
-#endif /* USE_SCROLL_HINTS */
- oline->firstchar = oline->lastchar = _NOCHANGE;
- if_USE_SCROLL_HINTS(oline->oldindex = i);
- }
-
- /*
- * Clean up debris from scrolling or resizing the pad, so we do not
- * accidentally pick up the index value during the next call to this
- * procedure. The only rows that should have an index value are those
- * that are displayed during this cycle.
- */
-#if USE_SCROLL_HINTS
- for (i = pminrow-1; (i >= 0) && (win->_line[i].oldindex >= 0); i--)
- win->_line[i].oldindex = _NEWINDEX;
- for (i = pmaxrow+1; (i <= win->_maxy) && (win->_line[i].oldindex >= 0); i++)
- win->_line[i].oldindex = _NEWINDEX;
-#endif
-
- win->_begx = smincol;
- win->_begy = sminrow;
-
- if (win->_clear) {
- win->_clear = FALSE;
- newscr->_clear = TRUE;
- }
-
- /*
- * Use the pad's current position, if it will be visible.
- * If not, don't do anything; it's not an error.
- */
- if (win->_leaveok == FALSE
- && win->_cury >= pminrow
- && win->_curx >= pmincol
- && win->_cury <= pmaxrow
- && win->_curx <= pmaxcol) {
- newscr->_cury = win->_cury - pminrow + win->_begy + win->_yoffset;
- newscr->_curx = win->_curx - pmincol + win->_begx;
- }
- win->_flags &= ~_HASMOVED;
-
- /*
- * Update our cache of the line-numbers that we displayed from the pad.
- * We will use this on subsequent calls to this function to derive
- * values to stuff into 'oldindex[]' -- for scrolling optimization.
- */
- win->_pad._pad_y = pminrow;
- win->_pad._pad_x = pmincol;
- win->_pad._pad_top = sminrow;
- win->_pad._pad_left = smincol;
- win->_pad._pad_bottom = smaxrow;
- win->_pad._pad_right = smaxcol;
-
- returnCode(OK);
-}
-
-int pechochar(WINDOW *pad, const chtype ch)
-{
- T((T_CALLED("pechochar(%p, %s)"), pad, _tracechtype(ch)));
-
- if (pad == 0)
- returnCode(ERR);
-
- if (!(pad->_flags & _ISPAD))
- returnCode(wechochar(pad,ch));
-
- waddch(pad, ch);
- prefresh(pad, pad->_pad._pad_y,
- pad->_pad._pad_x,
- pad->_pad._pad_top,
- pad->_pad._pad_left,
- pad->_pad._pad_bottom,
- pad->_pad._pad_right);
-
- returnCode(OK);
-}
projects / ncurses.git / blobdiff