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+/****************************************************************************
+ * Copyright (c) 1998-2007,2008 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 1.108 2008/05/03 22:42:43 tom Exp $")
+
+NCURSES_EXPORT(SCREEN *)
+set_term(SCREEN *screenp)
+{
+ SCREEN *oldSP;
+
+ T((T_CALLED("set_term(%p)"), screenp));
+
+ _nc_lock_global(set_SP);
+
+ oldSP = SP;
+ _nc_set_screen(screenp);
+
+ if (SP != 0) {
+ set_curterm(SP->_term);
+#if !USE_REENTRANT
+ curscr = SP->_curscr;
+ newscr = SP->_newscr;
+ stdscr = SP->_stdscr;
+ COLORS = SP->_color_count;
+ COLOR_PAIRS = SP->_pair_count;
+#endif
+ } else {
+ set_curterm(0);
+#if !USE_REENTRANT
+ curscr = 0;
+ newscr = 0;
+ stdscr = 0;
+ COLORS = 0;
+ COLOR_PAIRS = 0;
+#endif
+ }
+
+ _nc_unlock_global(set_SP);
+
+ T((T_RETURN("%p"), oldSP));
+ return (oldSP);
+}
+
+static void
+_nc_free_keytry(TRIES * kt)
+{
+ if (kt != 0) {
+ _nc_free_keytry(kt->child);
+ _nc_free_keytry(kt->sibling);
+ free(kt);
+ }
+}
+
+static bool
+delink_screen(SCREEN *sp)
+{
+ SCREEN *last = 0;
+ SCREEN *temp;
+ bool result = FALSE;
+
+ for (each_screen(temp)) {
+ if (temp == sp) {
+ if (last)
+ last = sp->_next_screen;
+ else
+ _nc_screen_chain = sp->_next_screen;
+ result = TRUE;
+ break;
+ }
+ last = temp;
+ }
+ return result;
+}
+
+/*
+ * Free the storage associated with the given SCREEN sp.
+ */
+NCURSES_EXPORT(void)
+delscreen(SCREEN *sp)
+{
+ int i;
+
+ T((T_CALLED("delscreen(%p)"), sp));
+
+ _nc_lock_global(set_SP);
+ if (delink_screen(sp)) {
+
+ (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);
+
+ FreeIfNeeded(sp->_acs_map);
+ FreeIfNeeded(sp->_screen_acs_map);
+
+ 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) {
+#if !USE_REENTRANT
+ curscr = 0;
+ newscr = 0;
+ stdscr = 0;
+ COLORS = 0;
+ COLOR_PAIRS = 0;
+#endif
+ _nc_set_screen(0);
+ }
+ }
+ _nc_unlock_global(set_SP);
+
+ returnVoid;
+}
+
+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
+
+/* OS-independent screen initializations */
+NCURSES_EXPORT(int)
+_nc_setupscreen(int slines GCC_UNUSED,
+ int scolumns GCC_UNUSED,
+ FILE *output,
+ bool filtered,
+ int slk_format)
+{
+ char *env;
+ int bottom_stolen = 0;
+ bool support_cookies = USE_XMC_SUPPORT;
+ ripoff_t *rop;
+
+ T((T_CALLED("_nc_setupscreen(%d, %d, %p, %d, %d)"),
+ slines, scolumns, output, filtered, slk_format));
+
+ assert(SP == 0); /* has been reset in newterm() ! */
+ if (!_nc_alloc_screen()
+ || ((SP->_acs_map = typeCalloc(chtype, ACS_LEN)) == 0)
+ || ((SP->_screen_acs_map = typeCalloc(bool, ACS_LEN)) == 0)) {
+ 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);
+
+ /*
+ * We should always check the screensize, just in case.
+ */
+ _nc_get_screensize(SP, &slines, &scolumns);
+ SET_LINES(slines);
+ SET_COLS(scolumns);
+ T((T_CREATE("screen %s %dx%d"), termname(), LINES, COLS));
+
+ SP->_filtered = filtered;
+
+ /* implement filter mode */
+ if (filtered) {
+ slines = 1;
+ SET_LINES(slines);
+ clear_screen = 0;
+ cursor_down = parm_down_cursor = 0;
+ cursor_address = 0;
+ cursor_up = parm_up_cursor = 0;
+ row_address = 0;
+
+ cursor_home = carriage_return;
+ T(("filter screensize %dx%d", LINES, COLS));
+ }
+#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.
+ */
+ SP->_ok_attributes = termattrs();
+ if (has_colors()) {
+ SP->_ok_attributes |= A_COLOR;
+ }
+#if USE_XMC_SUPPORT
+ /*
+ * If we have no magic-cookie support compiled-in, or if it is suppressed
+ * in the environment, reset the support-flag.
+ */
+ if (magic_cookie_glitch >= 0) {
+ if (getenv("NCURSES_NO_MAGIC_COOKIE") != 0) {
+ support_cookies = FALSE;
+ }
+ }
+#endif
+
+ if (!support_cookies && magic_cookie_glitch >= 0) {
+ T(("will disable attributes to work w/o magic cookies"));
+ }
+
+ if (magic_cookie_glitch > 0) { /* tvi, wyse */
+
+ SP->_xmc_triggers = SP->_ok_attributes & (
+ A_STANDOUT |
+ A_UNDERLINE |
+ A_REVERSE |
+ A_BLINK |
+ A_DIM |
+ A_BOLD |
+ A_INVIS |
+ A_PROTECT
+ );
+#if 0
+ /*
+ * We "should" treat colors as an attribute. The wyse350 (and its
+ * clones) appear to be the only ones that have both colors and magic
+ * cookies.
+ */
+ if (has_colors()) {
+ SP->_xmc_triggers |= A_COLOR;
+ }
+#endif
+ SP->_xmc_suppress = SP->_xmc_triggers & (chtype) ~(A_BOLD);
+
+ T(("magic cookie attributes %s", _traceattr(SP->_xmc_suppress)));
+ /*
+ * Supporting line-drawing may be possible. But make the regular
+ * video attributes work first.
+ */
+ acs_chars = ABSENT_STRING;
+ ena_acs = ABSENT_STRING;
+ enter_alt_charset_mode = ABSENT_STRING;
+ exit_alt_charset_mode = ABSENT_STRING;
+#if USE_XMC_SUPPORT
+ /*
+ * To keep the cookie support simple, suppress all of the optimization
+ * hooks except for clear_screen and the cursor addressing.
+ */
+ if (support_cookies) {
+ clr_eol = ABSENT_STRING;
+ clr_eos = ABSENT_STRING;
+ set_attributes = ABSENT_STRING;
+ }
+#endif
+ } else if (magic_cookie_glitch == 0) { /* hpterm */
+ }
+
+ /*
+ * If magic cookies are not supported, cancel the strings that set
+ * video attributes.
+ */
+ if (!support_cookies && magic_cookie_glitch >= 0) {
+ magic_cookie_glitch = ABSENT_NUMERIC;
+ set_attributes = ABSENT_STRING;
+ enter_blink_mode = ABSENT_STRING;
+ enter_bold_mode = ABSENT_STRING;
+ enter_dim_mode = ABSENT_STRING;
+ enter_reverse_mode = ABSENT_STRING;
+ enter_standout_mode = ABSENT_STRING;
+ enter_underline_mode = ABSENT_STRING;
+ }
+
+ /* initialize normal acs before wide, since we use mapping in the latter */
+#if !USE_WIDEC_SUPPORT
+ if (_nc_unicode_locale() && _nc_locale_breaks_acs()) {
+ acs_chars = NULL;
+ ena_acs = NULL;
+ enter_alt_charset_mode = NULL;
+ exit_alt_charset_mode = NULL;
+ set_attributes = NULL;
+ }
+#endif
+ _nc_init_acs();
+#if USE_WIDEC_SUPPORT
+ _nc_init_wacs();
+
+ SP->_screen_acs_fix = (_nc_unicode_locale() && _nc_locale_breaks_acs());
+#endif
+ env = _nc_get_locale();
+ SP->_legacy_coding = ((env == 0)
+ || !strcmp(env, "C")
+ || !strcmp(env, "POSIX"));
+ T(("legacy-coding %d", SP->_legacy_coding));
+
+ _nc_idcok = TRUE;
+ _nc_idlok = FALSE;
+
+ SP->oldhash = 0;
+ SP->newhash = 0;
+
+ T(("creating newscr"));
+ if ((SP->_newscr = newwin(slines, scolumns, 0, 0)) == 0)
+ returnCode(ERR);
+
+ T(("creating curscr"));
+ if ((SP->_curscr = newwin(slines, scolumns, 0, 0)) == 0)
+ returnCode(ERR);
+
+#if !USE_REENTRANT
+ newscr = SP->_newscr;
+ curscr = SP->_curscr;
+#endif
+#if USE_SIZECHANGE
+ SP->_resize = resizeterm;
+#endif
+
+ newscr->_clear = TRUE;
+ curscr->_clear = FALSE;
+
+ def_shell_mode();
+ def_prog_mode();
+
+ for (rop = ripoff_stack;
+ rop != ripoff_sp && (rop - ripoff_stack) < N_RIPS;
+ rop++) {
+
+ /* If we must simulate soft labels, grab off the line to be used.
+ We assume that we must simulate, if it is none of the standard
+ formats (4-4 or 3-2-3) for which there may be some hardware
+ support. */
+ if (rop->hook == _nc_slk_initialize)
+ if (!(num_labels <= 0 || !SLK_STDFMT(slk_format)))
+ continue;
+ if (rop->hook) {
+ int count;
+ WINDOW *w;
+
+ count = (rop->line < 0) ? -rop->line : rop->line;
+ T(("ripping off %i lines at %s", count,
+ ((rop->line < 0)
+ ? "bottom"
+ : "top")));
+
+ w = newwin(count, scolumns,
+ ((rop->line < 0)
+ ? SP->_lines_avail - count
+ : 0),
+ 0);
+ if (w) {
+ rop->win = w;
+ rop->hook(w, scolumns);
+ } else {
+ returnCode(ERR);
+ }
+ if (rop->line < 0)
+ bottom_stolen += count;
+ else
+ SP->_topstolen += count;
+ SP->_lines_avail -= count;
+ }
+ }
+ /* reset the stack */
+ ripoff_sp = ripoff_stack;
+
+ T(("creating stdscr"));
+ assert((SP->_lines_avail + SP->_topstolen + bottom_stolen) == slines);
+ if ((SP->_stdscr = newwin(SP->_lines_avail, scolumns, 0, 0)) == 0)
+ returnCode(ERR);
+
+ SET_LINES(SP->_lines_avail);
+#if !USE_REENTRANT
+ stdscr = SP->_stdscr;
+#endif
+
+ 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 (ripoff_sp == 0)
+ ripoff_sp = ripoff_stack;
+ if (ripoff_sp >= ripoff_stack + N_RIPS)
+ returnCode(ERR);
+
+ ripoff_sp->line = line;
+ ripoff_sp->hook = init;
+ ripoff_sp++;
+ }
+
+ returnCode(OK);
+}
+
+NCURSES_EXPORT(int)
+ripoffline(int line, int (*init) (WINDOW *, int))
+{
+ START_TRACE();
+ T((T_CALLED("ripoffline(%d,%p)"), line, init));
+
+ if (line == 0)
+ returnCode(OK);
+
+ returnCode(_nc_ripoffline((line < 0) ? -1 : 1, init));
+}