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ncursesw-morphos/ncurses/base/lib_set_term.c
Thomas E. Dickey 55ccd2b959 ncurses 5.5
2005-10-09 14:41:57 -04:00

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/****************************************************************************
* Copyright (c) 1998-2004,2005 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> *
* and: Thomas E. Dickey 1996-on *
****************************************************************************/
/*
** lib_set_term.c
**
** The routine set_term().
**
*/
#include <curses.priv.h>
#include <term.h> /* cur_term */
#include <tic.h>
MODULE_ID("$Id: lib_set_term.c,v 1.85 2005/01/22 17:36:01 tom Exp $")
NCURSES_EXPORT(SCREEN *)
set_term(SCREEN *screenp)
{
SCREEN *oldSP;
T((T_CALLED("set_term(%p)"), screenp));
oldSP = SP;
_nc_set_screen(screenp);
set_curterm(SP->_term);
curscr = SP->_curscr;
newscr = SP->_newscr;
stdscr = SP->_stdscr;
COLORS = SP->_color_count;
COLOR_PAIRS = SP->_pair_count;
T((T_RETURN("%p"), oldSP));
return (oldSP);
}
static void
_nc_free_keytry(struct tries *kt)
{
if (kt != 0) {
_nc_free_keytry(kt->child);
_nc_free_keytry(kt->sibling);
free(kt);
}
}
/*
* Free the storage associated with the given SCREEN sp.
*/
NCURSES_EXPORT(void)
delscreen(SCREEN *sp)
{
SCREEN **scan = &_nc_screen_chain;
int i;
T((T_CALLED("delscreen(%p)"), sp));
while (*scan) {
if (*scan == sp) {
*scan = sp->_next_screen;
break;
}
scan = &(*scan)->_next_screen;
}
(void) _nc_freewin(sp->_curscr);
(void) _nc_freewin(sp->_newscr);
(void) _nc_freewin(sp->_stdscr);
if (sp->_slk != 0) {
if (sp->_slk->ent != 0) {
for (i = 0; i < sp->_slk->labcnt; ++i) {
FreeIfNeeded(sp->_slk->ent[i].ent_text);
FreeIfNeeded(sp->_slk->ent[i].form_text);
}
free(sp->_slk->ent);
}
free(sp->_slk);
sp->_slk = 0;
}
_nc_free_keytry(sp->_keytry);
sp->_keytry = 0;
_nc_free_keytry(sp->_key_ok);
sp->_key_ok = 0;
FreeIfNeeded(sp->_current_attr);
FreeIfNeeded(sp->_color_table);
FreeIfNeeded(sp->_color_pairs);
FreeIfNeeded(sp->oldhash);
FreeIfNeeded(sp->newhash);
FreeIfNeeded(sp->hashtab);
del_curterm(sp->_term);
/*
* If the associated output stream has been closed, we can discard the
* set-buffer. Limit the error check to EBADF, since fflush may fail
* for other reasons than trying to operate upon a closed stream.
*/
if (sp->_ofp != 0
&& sp->_setbuf != 0
&& fflush(sp->_ofp) != 0
&& errno == EBADF) {
free(sp->_setbuf);
}
free(sp);
/*
* If this was the current screen, reset everything that the
* application might try to use (except cur_term, which may have
* multiple references in different screens).
*/
if (sp == SP) {
curscr = 0;
newscr = 0;
stdscr = 0;
COLORS = 0;
COLOR_PAIRS = 0;
_nc_set_screen(0);
}
returnVoid;
}
static ripoff_t rippedoff[5];
static ripoff_t *rsp = rippedoff;
#define N_RIPS SIZEOF(SP->_rippedoff)
static bool
no_mouse_event(SCREEN *sp GCC_UNUSED)
{
return FALSE;
}
static bool
no_mouse_inline(SCREEN *sp GCC_UNUSED)
{
return FALSE;
}
static bool
no_mouse_parse(int code GCC_UNUSED)
{
return TRUE;
}
static void
no_mouse_resume(SCREEN *sp GCC_UNUSED)
{
}
static void
no_mouse_wrap(SCREEN *sp GCC_UNUSED)
{
}
#if NCURSES_EXT_FUNCS && USE_COLORFGBG
static char *
extract_fgbg(char *src, int *result)
{
char *dst = 0;
long value = strtol(src, &dst, 0);
if (dst == 0) {
dst = src;
} else if (value >= 0) {
*result = value;
}
while (*dst != 0 && *dst != ';')
dst++;
if (*dst == ';')
dst++;
return dst;
}
#endif
NCURSES_EXPORT(int)
_nc_setupscreen(short slines, short const scolumns, FILE *output)
/* OS-independent screen initializations */
{
int bottom_stolen = 0;
int i;
T((T_CALLED("_nc_setupscreen(%d, %d, %p)"), slines, scolumns, output));
assert(SP == 0); /* has been reset in newterm() ! */
if (!_nc_alloc_screen())
returnCode(ERR);
T(("created SP %p", SP));
SP->_next_screen = _nc_screen_chain;
_nc_screen_chain = SP;
if ((SP->_current_attr = typeCalloc(NCURSES_CH_T, 1)) == 0)
returnCode(ERR);
#ifdef __DJGPP__
T(("setting output mode to binary"));
fflush(output);
setmode(output, O_BINARY);
#endif
_nc_set_buffer(output, TRUE);
SP->_term = cur_term;
SP->_lines = slines;
SP->_lines_avail = slines;
SP->_columns = scolumns;
SP->_cursrow = -1;
SP->_curscol = -1;
SP->_nl = TRUE;
SP->_raw = FALSE;
SP->_cbreak = 0;
SP->_echo = TRUE;
SP->_fifohead = -1;
SP->_endwin = TRUE;
SP->_ofp = output;
SP->_cursor = -1; /* cannot know real cursor shape */
#if NCURSES_NO_PADDING
SP->_no_padding = getenv("NCURSES_NO_PADDING") != 0;
TR(TRACE_CHARPUT | TRACE_MOVE, ("padding will%s be used",
SP->_no_padding ? " not" : ""));
#endif
#if NCURSES_EXT_FUNCS
SP->_default_color = FALSE;
SP->_has_sgr_39_49 = FALSE;
/*
* Set our assumption of the terminal's default foreground and background
* colors. The curs_color man-page states that we can assume that the
* background is black. The origin of this assumption appears to be
* terminals that displayed colored text, but no colored backgrounds, e.g.,
* the first colored terminals around 1980. More recent ones with better
* technology can display not only colored backgrounds, but all
* combinations. So a terminal might be something other than "white" on
* black (green/black looks monochrome too), but black on white or even
* on ivory.
*
* White-on-black is the simplest thing to use for monochrome. Almost
* all applications that use color paint both text and background, so
* the distinction is moot. But a few do not - which is why we leave this
* configurable (a better solution is to use assume_default_colors() for
* the rare applications that do require that sort of appearance, since
* is appears that more users expect to be able to make a white-on-black
* or black-on-white display under control of the application than not).
*/
#ifdef USE_ASSUMED_COLOR
SP->_default_fg = COLOR_WHITE;
SP->_default_bg = COLOR_BLACK;
#else
SP->_default_fg = C_MASK;
SP->_default_bg = C_MASK;
#endif
/*
* Allow those assumed/default color assumptions to be overridden at
* runtime:
*/
if (getenv("NCURSES_ASSUMED_COLORS") != 0) {
char *p = getenv("NCURSES_ASSUMED_COLORS");
int fg, bg;
char sep1, sep2;
int count = sscanf(p, "%d%c%d%c", &fg, &sep1, &bg, &sep2);
if (count >= 1) {
SP->_default_fg = (fg >= 0 && fg < max_colors) ? fg : C_MASK;
if (count >= 3) {
SP->_default_bg = (bg >= 0 && bg < max_colors) ? bg : C_MASK;
}
TR(TRACE_CHARPUT | TRACE_MOVE,
("from environment assumed fg=%d, bg=%d",
SP->_default_fg,
SP->_default_bg));
}
}
#if USE_COLORFGBG
/*
* If rxvt's $COLORFGBG variable is set, use it to specify the assumed
* default colors. Note that rxvt (mis)uses bold colors, equating a bold
* color to that value plus 8. We'll only use the non-bold color for now -
* decide later if it is worth having default attributes as well.
*/
if (getenv("COLORFGBG") != 0) {
char *p = getenv("COLORFGBG");
TR(TRACE_CHARPUT | TRACE_MOVE, ("decoding COLORFGBG %s", p));
p = extract_fgbg(p, &(SP->_default_fg));
p = extract_fgbg(p, &(SP->_default_bg));
if (*p) /* assume rxvt was compiled with xpm support */
p = extract_fgbg(p, &(SP->_default_bg));
TR(TRACE_CHARPUT | TRACE_MOVE, ("decoded fg=%d, bg=%d",
SP->_default_fg, SP->_default_bg));
if (SP->_default_fg >= max_colors) {
if (set_a_foreground != ABSENT_STRING
&& !strcmp(set_a_foreground, "\033[3%p1%dm")) {
set_a_foreground = "\033[3%?%p1%{8}%>%t9%e%p1%d%;m";
} else {
SP->_default_fg %= max_colors;
}
}
if (SP->_default_bg >= max_colors) {
if (set_a_background != ABSENT_STRING
&& !strcmp(set_a_background, "\033[4%p1%dm")) {
set_a_background = "\033[4%?%p1%{8}%>%t9%e%p1%d%;m";
} else {
SP->_default_bg %= max_colors;
}
}
}
#endif
#endif /* NCURSES_EXT_FUNCS */
SP->_maxclick = DEFAULT_MAXCLICK;
SP->_mouse_event = no_mouse_event;
SP->_mouse_inline = no_mouse_inline;
SP->_mouse_parse = no_mouse_parse;
SP->_mouse_resume = no_mouse_resume;
SP->_mouse_wrap = no_mouse_wrap;
SP->_mouse_fd = -1;
/* initialize the panel hooks */
SP->_panelHook.top_panel = (struct panel *) 0;
SP->_panelHook.bottom_panel = (struct panel *) 0;
SP->_panelHook.stdscr_pseudo_panel = (struct panel *) 0;
/*
* If we've no magic cookie support, we suppress attributes that xmc
* would affect, i.e., the attributes that affect the rendition of a
* space. Note that this impacts the alternate character set mapping
* as well.
*/
if (magic_cookie_glitch > 0) {
SP->_xmc_triggers = termattrs() & (
A_ALTCHARSET |
A_BLINK |
A_BOLD |
A_REVERSE |
A_STANDOUT |
A_UNDERLINE
);
SP->_xmc_suppress = SP->_xmc_triggers & (chtype) ~(A_BOLD);
T(("magic cookie attributes %s", _traceattr(SP->_xmc_suppress)));
#if USE_XMC_SUPPORT
/*
* To keep this simple, suppress all of the optimization hooks
* except for clear_screen and the cursor addressing.
*/
clr_eol = 0;
clr_eos = 0;
set_attributes = 0;
#else
magic_cookie_glitch = ABSENT_NUMERIC;
acs_chars = 0;
#endif
}
/* initialize normal acs before wide, since we use mapping in the latter */
_nc_init_acs();
#if USE_WIDEC_SUPPORT
_nc_init_wacs();
SP->_screen_acs_fix = (_nc_unicode_locale() && _nc_locale_breaks_acs());
{
char *env = _nc_get_locale();
SP->_legacy_coding = ((env == 0)
|| !strcmp(env, "C")
|| !strcmp(env, "POSIX"));
}
#endif
_nc_idcok = TRUE;
_nc_idlok = FALSE;
_nc_windows = 0; /* no windows yet */
SP->oldhash = 0;
SP->newhash = 0;
T(("creating newscr"));
if ((newscr = newwin(slines, scolumns, 0, 0)) == 0)
returnCode(ERR);
T(("creating curscr"));
if ((curscr = newwin(slines, scolumns, 0, 0)) == 0)
returnCode(ERR);
SP->_newscr = newscr;
SP->_curscr = curscr;
#if USE_SIZECHANGE
SP->_resize = resizeterm;
#endif
newscr->_clear = TRUE;
curscr->_clear = FALSE;
def_shell_mode();
def_prog_mode();
for (i = 0, rsp = rippedoff; rsp->line && (i < (int) N_RIPS); rsp++, i++) {
T(("ripping off line %d at %s", i, rsp->line < 0 ? "bottom" : "top"));
SP->_rippedoff[i] = rippedoff[i];
if (rsp->hook) {
int count = (rsp->line < 0) ? -rsp->line : rsp->line;
SP->_rippedoff[i].w = newwin(count,
scolumns,
((rsp->line < 0)
? SP->_lines_avail - count
: 0),
0);
if (SP->_rippedoff[i].w != 0)
SP->_rippedoff[i].hook(SP->_rippedoff[i].w, scolumns);
else
returnCode(ERR);
if (rsp->line < 0)
bottom_stolen += count;
else
SP->_topstolen += count;
SP->_lines_avail -= count;
}
rsp->line = 0;
}
SP->_rip_count = i;
/* reset the stack */
rsp = rippedoff;
T(("creating stdscr"));
assert((SP->_lines_avail + SP->_topstolen + bottom_stolen) == slines);
if ((stdscr = newwin(LINES = SP->_lines_avail, scolumns, 0, 0)) == 0)
returnCode(ERR);
SP->_stdscr = stdscr;
returnCode(OK);
}
/* The internal implementation interprets line as the number of
lines to rip off from the top or bottom.
*/
NCURSES_EXPORT(int)
_nc_ripoffline(int line, int (*init) (WINDOW *, int))
{
T((T_CALLED("_nc_ripoffline(%d, %p)"), line, init));
if (line != 0) {
if (rsp >= rippedoff + N_RIPS)
returnCode(ERR);
rsp->line = line;
rsp->hook = init;
rsp->w = 0;
rsp++;
}
returnCode(OK);
}
NCURSES_EXPORT(int)
ripoffline(int line, int (*init) (WINDOW *, int))
{
T((T_CALLED("ripoffline(%d,%p)"), line, init));
if (line == 0)
returnCode(OK);
returnCode(_nc_ripoffline((line < 0) ? -1 : 1, init));
}
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