GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libcurses/base/lib_pad.c Lines: 0 94 0.0 %
Date: 2017-11-07 Branches: 0 92 0.0 %

Line Branch Exec Source
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/* $OpenBSD: lib_pad.c,v 1.5 2010/01/12 23:22:06 nicm Exp $ */
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/****************************************************************************
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 * Copyright (c) 1998-2004,2006 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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 ****************************************************************************/
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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 1.5 2010/01/12 23:22:06 nicm Exp $")
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NCURSES_EXPORT(WINDOW *)
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newpad(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(%d, %d)"), l, c));
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    if (l <= 0 || c <= 0)
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	returnWin(0);
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    if ((win = _nc_makenew(l, c, 0, 0, _ISPAD)) == 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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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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    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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	&& doupdate() != 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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#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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       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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    /* 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
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	|| smaxcol >= screen_columns
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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 > (newscr->_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 <= newscr->_maxy;
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	 i++, m++) {
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	register struct ldat *nline = &newscr->_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 = &curscr->_line[nind];
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		for (j = 0; j <= my_len; j++) {
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		    int k = newscr->_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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	newscr->_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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	newscr->_cury = win->_cury - pminrow + win->_begy + win->_yoffset;
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	newscr->_curx = win->_curx - pmincol + win->_begx;
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    }
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    newscr->_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)"), 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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}