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* Add initial compose widgetDrew DeVault2019-05-121-1/+1
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* Refactor ctx stashing out of exlineDrew DeVault2019-05-111-8/+2
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* Split ex line text handling into dedicated widgetDrew DeVault2019-05-111-98/+18
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* lib/ui: introduce InvalidatableSimon Ser2019-04-271-7/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Many Drawable implementations have their own Invalidate and OnInvalidate functions, with an unexported onInvalidate field. However OnInvalidate and Invalidate are usually not called in the same goroutine. This results in a race on this field, e.g.: Read at 0x00c000094748 by goroutine 7: git.sr.ht/~sircmpwn/aerc2/widgets.NewDirectoryList.func1() /home/simon/src/aerc2/widgets/dirlist.go:85 +0x56 git.sr.ht/~sircmpwn/aerc2/widgets.(*Spinner).Start.func1() /home/simon/src/aerc2/widgets/spinner.go:93 +0x1bb Previous write at 0x00c000094748 by main goroutine: [failed to restore the stack] Goroutine 7 (running) created at: git.sr.ht/~sircmpwn/aerc2/widgets.(*Spinner).Start() /home/simon/src/aerc2/widgets/spinner.go:46 +0x8f git.sr.ht/~sircmpwn/aerc2/widgets.NewDirectoryList() /home/simon/src/aerc2/widgets/dirlist.go:37 +0x286 git.sr.ht/~sircmpwn/aerc2/widgets.NewAccountView() /home/simon/src/aerc2/widgets/account.go:50 +0x5ca git.sr.ht/~sircmpwn/aerc2/widgets.NewAerc() /home/simon/src/aerc2/widgets/aerc.go:60 +0x800 main.main() /home/simon/src/aerc2/aerc.go:65 +0x33e To fix this, introduce a new type, Invalidatable, which protects the field. Unfortunately the Drawable must be passed to the callback function in Invalidate, so we still need to re-implement this in each Invalidatable user.
* Add basic terminal widgetDrew DeVault2019-03-171-0/+9
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* Rig up key bindingsDrew DeVault2019-03-151-2/+6
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* Implement key bindings subsystemDrew DeVault2019-03-151-4/+2
| | | | Which is not yet rigged up
* Add cursor handling in ex lineDrew DeVault2019-01-141-3/+9
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* Apply gofmtDrew DeVault2018-06-111-3/+3
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* switch to tcell from termboxMarkus Ongyerth2018-06-011-28/+21
| | | | | | | | | | | | | This is a simple mostly straight forward switch to tcell in favor of termbox. It uses the tcell native api (not the compat layer) but does not make use of most features. Further changes should include moving to tcell's views.TextArea and the general built in widget behaviour instead of the current ad hoc implementation. Regression: Cursor isn't shown in ex-line
* Add statusline widgetDrew DeVault2018-02-271-5/+14
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* Make ex line fully unicode awareDrew DeVault2018-02-271-20/+19
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* Split UI library and widgetsDrew DeVault2018-02-261-0/+129
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#include "HTUtils.h"
#include "tcp.h"
#include "LYCurses.h"
#include "LYStyle.h"
#include "LYUtils.h"
#include "LYGlobalDefs.h"
#include "LYSignal.h"
#include "LYClean.h"
#include "LYStrings.h"
#ifdef USE_SLANG
#include "LYCharSets.h"
#endif /* USE_SLANG */

#include "LYexit.h"
#include "LYLeaks.h"

#define FREE(x) if (x) {free(x); x = NULL;}

#ifdef VMS
#define DISPLAY "DECW$DISPLAY"
#else
#define DISPLAY "DISPLAY"
#endif /* VMS */

#if defined(VMS) && defined(__GNUC__)
#include <gnu_hacks.h>
#undef LINES
#undef COLS
#define LINES lines
#define COLS cols
extern int _NOSHARE(LINES);
extern int _NOSHARE(COLS);
#endif /* VMS && __GNUC__ */

#ifdef USE_COLOR_STYLE
#include "AttrList.h"
#include "LYHash.h"
int has_color = 0;
#endif

/*
 *  These are routines to start and stop curses and to cleanup
 *  the screen at the end.
 */

PRIVATE int dumbterm PARAMS((char *terminal));
BOOLEAN LYCursesON = FALSE;

#if USE_COLOR_TABLE || defined(USE_SLANG)
PRIVATE int Current_Attr;
#endif

#ifdef USE_SLANG
PUBLIC unsigned int Lynx_Color_Flags = 0;
PUBLIC BOOLEAN FullRefresh = FALSE;
PUBLIC int curscr = 0;
#ifdef SLANG_MBCS_HACK
/*
 *  Will be set by size_change. - KW
 */
PUBLIC int PHYSICAL_SLtt_Screen_Cols = 10;
#endif /* SLANG_MBCS_HACK */

PUBLIC void LY_SLrefresh NOARGS
{
    if (FullRefresh) {
	SLsmg_touch_lines(0, LYlines);
	FullRefresh = FALSE;
    }
    SLsmg_refresh();

    return;
}

PUBLIC void LY_SLclear NOARGS
{
    SLsmg_gotorc (0, 0);
    SLsmg_erase_eos ();
}

#ifdef VMS
PUBLIC void VTHome NOARGS
{
    printf("\033[;H");

    return;
}
#endif /* VMS */

PUBLIC void LYaddAttr ARGS1(
	int,		a)
{
    Current_Attr |= a;
    SLsmg_set_color(Current_Attr);
}

PUBLIC void LYsubAttr ARGS1(
	int,		a)
{
    Current_Attr &= ~a;
    SLsmg_set_color(Current_Attr);
}

PUBLIC void lynx_setup_colors NOARGS
{
    SLtt_set_color(0, NULL, "black", "white");
    SLtt_set_color(1, NULL, "blue", "white");	 /* bold */
    SLtt_set_color(2, NULL, "yellow", "blue");	 /* reverse */
    SLtt_set_color(4, NULL, "magenta", "white"); /* underline */
    /*
     *  The other objects are '|'ed together to get rest.
     */
    SLtt_set_color(3, NULL, "green", "white");	 /* bold-reverse */
    SLtt_set_color(5, NULL, "blue", "white");    /* bold-underline */
    SLtt_set_color(6, NULL, "red", "white");	 /* reverse-underline */
    SLtt_set_color(7, NULL, "magenta", "cyan");	 /* reverse-underline-bold */

    /*
     *  Now set monchrome attributes.
     */
    SLtt_set_mono(1, NULL, SLTT_BOLD_MASK);
    SLtt_set_mono(2, NULL, SLTT_REV_MASK);
    SLtt_set_mono(3, NULL, SLTT_REV_MASK | SLTT_BOLD_MASK);
    SLtt_set_mono(4, NULL, SLTT_ULINE_MASK);
    SLtt_set_mono(5, NULL, SLTT_ULINE_MASK | SLTT_BOLD_MASK);
    SLtt_set_mono(6, NULL, SLTT_ULINE_MASK | SLTT_REV_MASK);
    SLtt_set_mono(7, NULL, SLTT_ULINE_MASK | SLTT_BOLD_MASK | SLTT_REV_MASK);
}

PRIVATE void sl_suspend ARGS1(
	int,		sig)
{
#ifdef SIGSTOP
#ifndef VMS
    int r, c;

    lynx_enable_mouse (0);
    if (sig == SIGTSTP)
	SLsmg_suspend_smg();
    SLang_reset_tty();
    kill(getpid(),SIGSTOP);
#if SLANG_VERSION > 9929
    SLang_init_tty(-1, 0, 1);
#else
    SLang_init_tty(3, 0, 1);
#endif /* SLANG_VERSION > 9929 */
    signal(SIGTSTP, sl_suspend);
#ifndef _WINDOWS
    SLtty_set_suspend_state(1);
#endif
    if (sig == SIGTSTP)
	SLsmg_resume_smg();
    /*
     *  Get new window size in case it changed.
     */
    r = SLtt_Screen_Rows;
    c = SLtt_Screen_Cols;
    size_change(0);
    if ((r != SLtt_Screen_Rows) || (c != SLtt_Screen_Cols)) {
	recent_sizechange = TRUE;
    }
    lynx_enable_mouse (1);
#endif /* !VMS */
#endif /* SIGSTOP */
   return;
}
#endif /* USE_SLANG */

#if defined(USE_COLOR_STYLE)
PRIVATE int last_styles[128];
PRIVATE int last_ptr=0;
#endif

#if defined(USE_COLOR_STYLE)
/* Ok, explanation of the USE_COLOR_STYLE styles.  The basic styles (ie non
 * HTML) are set the same as the SLANG version for ease of programming.  The
 * other styles are simply the HTML enum from HTMLDTD.h + 16.
 */
PUBLIC HTCharStyle displayStyles[DSTYLE_ELEMENTS];

/*
 * set a style's attributes - RP
 */
PUBLIC void setStyle ARGS4(int,style,int,color,int,cattr,int,mono)
{
	displayStyles[style].color=color;
	displayStyles[style].cattr=cattr;
	displayStyles[style].mono=mono;
}

PUBLIC void setHashStyle ARGS5(int,style,int,color,int,cattr,int,mono,char*,element)
{
    bucket* ds=&hashStyles[style];
    if (TRACE)
	fprintf(stderr, "CSS(SET): <%s> hash=%d, ca=%d, ma=%d\n", element, style, color, mono);
    ds->color=color;
    ds->cattr=cattr;
    ds->mono=mono;
    ds->code=style;
    ds->name=malloc(sizeof(char)*(strlen(element)+2));
    strcpy(ds->name, element);
}

/*
 * set the curses attributes to be color or mono - RP
 */
PRIVATE int LYAttrset ARGS3(WINDOW*,win,int,color,int,mono)
{
	if (TRACE)
		fprintf(stderr, "CSS:LYAttrset (%d, %d)\n", color, mono);
	if (has_color && LYShowColor >= SHOW_COLOR_ON && color > -1)
	{
		wattrset(win,color);
#if 0
		//wbkgdset(win,color);
#endif
		return color;
	}
	if (mono > -1)
	{
		wattrset(win,mono);
#if 0
		//wbkgdset(win,mono);
#endif
		return mono;
	}
	wattrset(win,A_NORMAL);
#if 0
	//wbkgdset(win,A_NORMAL);
#endif
	return A_NORMAL;
}

PUBLIC void curses_w_style ARGS4(WINDOW*,win,int,style,int,dir,int,previous)
{
	int YP,XP;
	bucket* ds=&hashStyles[style];

	if (!ds->name)
	{
		if (TRACE)
		fprintf(stderr, "CSS.CS:Style %d not configured\n",style);
		return;
	}
	if (TRACE)
		fprintf(stderr, "CSS.CS:<%s%s> (%d)\n",(dir?"":"/"),ds->name,ds->code);

	getyx (win, YP, XP);

	if (style == s_normal && dir)
	{
		wattrset(win,A_NORMAL);
		if (win==stdscr) cached_styles[YP][XP]=s_normal;
		return;
	}

	switch (dir)
	{
		/* ABS_OFF is the same as STACK_OFF for the moment */
	case STACK_OFF:
		if (last_ptr)
			LYAttrset(win,last_styles[--last_ptr],-1);
		else
			LYAttrset(win,A_NORMAL,-1);
		return;

	case STACK_ON: /* remember the current attributes */
		if (last_ptr > 127) {
		    if (TRACE)
			fprintf(stderr,"........... %s (0x%x) %s\r\n",
				"attribute cache FULL, dropping last",
				last_styles[last_ptr],
				"in LynxChangStyle(curses_w_style)");
		    last_ptr--;
		}
#ifndef _NCURSES_H
		last_styles[last_ptr++] = getattrs(stdscr);
#else
		last_styles[last_ptr++] = attr_get();
#endif
		/* don't cache style changes for active links */
		if (style != s_alink)
		{
			if (TRACE)
				fprintf(stderr, "CACHED: <%s> @(%d,%d)\n", ds->name, YP, XP);
			if (win==stdscr) cached_styles[YP][XP]=style;
			LYAttrset(win, ds->color, ds->mono);
		}
		else
		{
			LYAttrset(win, ds->color, ds->mono);
		}
		return;

	case ABS_ON: /* change without remembering the previous style */
		/* don't cache style changes for active links */
		if (style != s_alink)
		{
			if (TRACE)
				fprintf(stderr, "CACHED: <%s> @(%d,%d)\n", ds->name, YP, XP);
			if (win==stdscr) cached_styles[YP][XP]=style;
			LYAttrset(win, ds->color, ds->mono);
		}
		else
		{
			LYAttrset(win, ds->color, ds->mono);
		}
		return;
	}
}

/*
 * wrapper function to set on-screen styles - RP
 */
PUBLIC void wcurses_css ARGS3(WINDOW *,win,char*,name,int,dir)
{
	int try_again=1;
	while (try_again)
	{
		int tmpHash=hash_code(name);
		if (TRACE)
			fprintf(stderr, "CSSTRIM:trying to set [%s] style - ", name);
		if (tmpHash==NOSTYLE) {
			char *class=strrchr(name, '.');
			if (TRACE) fprintf(stderr, "undefined, trimming at %p\n", class);
			if (class)	*class='\0';
			else		try_again=0;
		} else {
			if (TRACE) fprintf(stderr, "ok (%d)\n", hash_code(name));
			curses_w_style(win, hash_code(name), dir, 0);
			try_again=0;
		}
	}
}

PUBLIC void curses_css ARGS2(char *,name,int,dir)
{
	wcurses_css(stdscr, name, dir);
}

PUBLIC void curses_style ARGS3(int,style,int,dir,int,previous)
{
    curses_w_style(stdscr, style, dir, previous);
}

#ifdef NOT_USED
void attribute ARGS2(int,style,int,dir)
{
    curses_style(style, dir, 0);
}
#endif
#endif /* USE_COLOR_STYLE */

#if USE_COLOR_TABLE && defined(COLOR_CURSES)
/*
 * This block of code is designed to produce the same color effects using SVr4
 * curses as the slang library's implementation in this module.  That maps the
 * SGR codes into a 0-7 index into the color table, with special treatment for
 * backgrounds.  There's a bit of convoluted (but necessary) code handling the
 * special case of initialization before 'initscr()' is called.
 * 1997/1/19 - T.E.Dickey <dickey@clark.net>
 */
PRIVATE int lynx_uses_color;
PRIVATE int lynx_called_initscr;

PRIVATE struct {
    int fg, bg;
    chtype attr;
} lynx_color_cfg[] = {
    /*0*/ { COLOR_BLACK,   COLOR_WHITE, A_NORMAL}, /* A_NORMAL */
    /*1*/ { COLOR_BLUE,    COLOR_WHITE, A_NORMAL}, /* A_BOLD */
    /*2*/ { COLOR_YELLOW,  COLOR_BLUE,  A_BOLD},   /* A_REVERSE */
    /*3*/ { COLOR_GREEN,   COLOR_WHITE, A_NORMAL}, /* A_REVERSE | A_BOLD */
    /*4*/ { COLOR_MAGENTA, COLOR_WHITE, A_NORMAL}, /* A_UNDERLINE */
    /*5*/ { COLOR_BLUE,    COLOR_WHITE, A_NORMAL}, /* A_UNDERLINE | A_BOLD */
    /*6*/ { COLOR_RED,     COLOR_WHITE, A_NORMAL}, /* A_UNDERLINE | A_REVERSE */
    /*7*/ { COLOR_MAGENTA, COLOR_CYAN,  A_NORMAL}  /* A_UNDERLINE | A_BOLD | A_REVERSE */
};

/*
 * Hold the codes for color-pairs here until 'initscr()' is called.
 */
PRIVATE struct {
    int fg;
    int bg;
} lynx_color_pairs[25];

/*
 * Map the SGR attributes (0-7) into ANSI colors, modified with the actual BOLD
 * attribute we'll get 16 colors.
 */
PRIVATE void LYsetWAttr ARGS1(WINDOW *, win)
{
    if (lynx_uses_color && LYShowColor >= SHOW_COLOR_ON) {
	int code = 0;
	int attr = A_NORMAL;
	int offs = 1;
	static int have_underline = -1;
	static int no_color_video = -1;

	if (have_underline < 0) {
#ifndef DOSPATH
		have_underline = tigetstr("smul") != 0;
#else
		have_underline = 1;
#endif /* DOSPATH */
	}

#ifndef __DJGPP__
	if (no_color_video < 0) {
		no_color_video = tigetnum("ncv");
	}
#endif /* __DJGPP__ */

	if (Current_Attr & A_BOLD)
		code |= 1;
	if (Current_Attr & A_REVERSE)
		code |= 2;
	if (Current_Attr & A_UNDERLINE)
		code |= 4;
	attr = lynx_color_cfg[code].attr;

	/*
	 * FIXME:  no_color_video isn't implemented (97/4/14) in ncurses 4.x,
	 * but may be in SVr4 (which would make this redundant for the latter).
	 */
	if ((Current_Attr & A_BOLD) && !(no_color_video & 33)) {
		attr |= A_BOLD;
		offs = 17;
	}

	if ((Current_Attr & A_UNDERLINE) && !(no_color_video & 2)) {
		attr |= A_UNDERLINE;
		offs = 17;
	}

	attr |= COLOR_PAIR(code+offs);

	wattrset(win, attr);
    } else {
	wattrset(win, Current_Attr);
    }
}

PRIVATE void lynx_map_color ARGS1(int, n)
{
    int m;

    lynx_color_pairs[n+1].fg = lynx_color_cfg[n].fg;
    lynx_color_pairs[n+1].bg = lynx_color_cfg[n].bg;

    lynx_color_pairs[n+9].fg = lynx_color_cfg[n].fg;
    lynx_color_pairs[n+9].bg = lynx_color_cfg[0].bg;

    lynx_color_pairs[n+17].fg = lynx_color_cfg[n].bg;
    lynx_color_pairs[n+17].bg = lynx_color_cfg[n].bg;

    if (lynx_called_initscr) {
	for (m = 0; m <= 16; m += 8) {
	    init_pair(n+m+1,
		lynx_color_pairs[n+m+1].fg,
		lynx_color_pairs[n+m+1].bg);
	}
	if (n == 0 && LYShowColor >= SHOW_COLOR_ON)
	    bkgd(COLOR_PAIR(9) | ' ');
    }
}

PUBLIC int lynx_chg_color ARGS3(
	int, color,
	int, fg,
	int, bg
	)
{
    if (color >= 0 && color < 8
     && fg >= 0 && fg < 16
     && bg >= 0 && bg < 16) {
	lynx_color_cfg[color].fg = fg & 7;
	lynx_color_cfg[color].bg = bg & 7;
	lynx_color_cfg[color].attr = (fg & 8) ? A_BOLD : A_NORMAL;
	lynx_map_color(color);
    } else {
	return -1;
    }
    return 0;
}

PUBLIC void lynx_set_color ARGS1(int, a)
{
    if (lynx_uses_color && LYShowColor >= SHOW_COLOR_ON) {
	attrset(lynx_color_cfg[a].attr | COLOR_PAIR(a+1));
    }
}

PUBLIC void lynx_standout ARGS1(int, flag)
{
    if (flag)
	LYaddAttr(A_REVERSE);
    else
	LYsubAttr(A_REVERSE);
}

PRIVATE void lynx_init_colors NOARGS
{
    lynx_uses_color = FALSE;

    if (has_colors()) {
	int n, m;

	lynx_uses_color = TRUE;
	start_color();

	for (n = 0; n < sizeof(lynx_color_cfg)/sizeof(lynx_color_cfg[0]); n++) {
	    for (m = 0; m <= 16; m += 8) {
		init_pair(n+m+1,
			lynx_color_pairs[n+m+1].fg,
			lynx_color_pairs[n+m+1].bg);
	    }
	    if (n == 0 && LYShowColor >= SHOW_COLOR_ON)
		bkgd(COLOR_PAIR(9) | ' ');
	}
    } else if (LYShowColor != SHOW_COLOR_NEVER) {
	LYShowColor = SHOW_COLOR_OFF;
    }
}

PUBLIC void lynx_setup_colors NOARGS
{
    int n;
    for (n = 0; n < 8; n++)
	lynx_map_color(n);
}
#endif /* USE_COLOR_TABLE */

#if defined (DJGPP) && !defined (USE_SLANG)
/*
 * Sorry about making a completely new function,
 * but the real one is messy! WB
 */
PUBLIC void start_curses NOARGS
{
	 static BOOLEAN first_time = TRUE;

	 if(first_time)
	 {
		  initscr();      /* start curses */
		  first_time = FALSE;
		  cbreak();
		  noecho();
		  keypad(stdscr, TRUE);
		  fflush(stdin);
		  fflush(stdout);
		  lynx_init_colors();
		  lynx_called_initscr = TRUE;

 /* Inform pdcurses that we're interested in knowing when mouse
    buttons are clicked.  Maybe someday pdcurses will support it.
 */
	 if (LYUseMouse)
	      lynx_enable_mouse (1);

	 } else sock_init();

	 LYCursesON = TRUE;
	 clear();
}
#else
PUBLIC void start_curses NOARGS
{
#ifdef USE_SLANG
    static int slinit;

    if (LYCursesON)
	return;

    if (slinit == 0) {
	SLtt_get_terminfo();
#ifdef UNIX
#if SLANG_VERSION >= 9935
	SLang_TT_Read_FD = fileno(stdin);
#endif /* SLANG_VERSION >= 9935 */
#endif /* UNIX */

	/*
	 *  Check whether a saved show_color:off override is in effect. - kw
	 */
	if (LYrcShowColor == SHOW_COLOR_NEVER) {
	    SLtt_Use_Ansi_Colors = 0;
	}
	/*
	 *  Check whether we're forcing color on. - FM
	 */
	if ((LYShowColor > 1) && (Lynx_Color_Flags & SL_LYNX_USE_COLOR))
	    SLtt_Use_Ansi_Colors = 1;
	/*
	 *  Check whether a -nocolor override is in effect. - kw
	 */
	if (Lynx_Color_Flags & SL_LYNX_OVERRIDE_COLOR)
	    SLtt_Use_Ansi_Colors = 0;
	/*
	 *  Make sure our flags are in register. - FM
	 */
	if (SLtt_Use_Ansi_Colors == 1) {
	    if (LYShowColor != SHOW_COLOR_ALWAYS) {
		LYShowColor = SHOW_COLOR_ON;
	    }
	} else {
	    if (LYShowColor != SHOW_COLOR_NEVER) {
		LYShowColor = SHOW_COLOR_OFF;
	    }
	}
	size_change(0);

	SLtt_add_color_attribute(4, SLTT_ULINE_MASK);
	SLtt_add_color_attribute(5, SLTT_ULINE_MASK);
	/*
	 *  If set, the blink escape sequence will turn on high
	 *  intensity background (rxvt and maybe Linux console).
	 */
	if (LYShowColor && (Lynx_Color_Flags & SL_LYNX_USE_BLINK)) {
	    SLtt_Blink_Mode = 1;
	} else {
	    SLtt_Blink_Mode = 0;
	}
    }
    slinit = 1;
    Current_Attr = 0;
#ifndef VMS
#if SLANG_VERSION > 9929
    SLang_init_tty(-1, 0, 1);
#else
    SLang_init_tty(3, 0, 1);
#endif /* SLANG_VERSION > 9929 */
#endif /* !VMS */
    SLsmg_init_smg();
    SLsmg_Display_Eight_Bit = LYlowest_eightbit[current_char_set];
    if (SLsmg_Display_Eight_Bit > 191)
       SLsmg_Display_Eight_Bit = 191; /* may print ctrl chars otherwise - kw */
    SLsmg_Newline_Moves = -1;
    SLsmg_Backspace_Moves = 1;
#ifndef VMS
#ifndef _WINDOWS
   SLtty_set_suspend_state(1);
#endif /* _WINDOWS */
#ifdef SIGTSTP
    if (!no_suspend)
	signal(SIGTSTP, sl_suspend);
#endif /* SIGTSTP */
    signal(SIGINT, cleanup_sig);
#endif /* !VMS */

   lynx_enable_mouse (1);

#else /* Using curses: */

#ifdef VMS
    /*
     *  If we are VMS then do initsrc() everytime start_curses()
     *  is called!
     */
    initscr();  /* start curses */
#else /* Unix: */
    static BOOLEAN first_time = TRUE;

    if (first_time) {
	/*
	 *  If we're not VMS then only do initsrc() one time,
	 *  and one time only!
	 */
	if (initscr() == NULL) {  /* start curses */
	    fprintf(stderr,
	        "Terminal initialisation failed - unknown terminal type?\n");
#ifndef NOSIGHUP
	    (void) signal(SIGHUP, SIG_DFL);
#endif /* NOSIGHUP */
	    (void) signal(SIGTERM, SIG_DFL);
	    (void) signal(SIGINT, SIG_DFL);
#ifdef SIGTSTP
	    if (no_suspend)
	        (void) signal(SIGTSTP,SIG_DFL);
#endif /* SIGTSTP */
	    exit (-1);
	}

	/*
	 * This is a workaround for a bug in SVr4 curses, observed on Solaris
	 * 2.4:  if your terminal's alternate-character set contains codes in
	 * the range 128-255, they'll be sign-extended in the acs_map[] table,
	 * which in turn causes their values to be emitted as 255 (0xff). 
	 * "Fix" this by forcing the table to 8-bit codes (it has to be
	 * anyway).
	 */
#if defined(ALT_CHAR_SET) && !defined(NCURSES_VERSION)
	{
	    int n;
	    for (n = 0; n < 128; n++)
	    	if (acs_map[n] & 0x80) {
	    	    acs_map[n] &= 0xff;
	    	    acs_map[n] |= A_ALTCHARSET;
		}
	}
#endif

#ifdef USE_COLOR_STYLE
	has_color = has_colors();
	if (has_color)
		start_color();
	parse_userstyles();
#endif
	first_time = FALSE;
#if USE_COLOR_TABLE
	lynx_init_colors();
	lynx_called_initscr = TRUE;
#endif /* USE_SLANG */
    }
#endif /* VMS */

    /* nonl();   */ /* seems to slow things down */

#ifdef VMS
    crmode();
    raw();
#else
#if HAVE_CBREAK
    cbreak();
#else
    crmode();
#endif /* HAVE_CBREAK */
    signal(SIGINT, cleanup_sig);
#endif /* VMS */

    noecho();

#if defined(HAVE_KEYPAD)
    keypad(stdscr,TRUE);
#endif /* HAVE_KEYPAD */

   lynx_enable_mouse (1);

    fflush(stdin);
    fflush(stdout);
    fflush(stderr);
#endif /* USE_SLANG */

#ifdef _WINDOWS
    clear();
#endif

    LYCursesON = TRUE;
}
#endif /* defined (DJGPP) && !defined (USE_SLANG) */

PUBLIC void lynx_enable_mouse ARGS1(int,state)
{
   if (LYUseMouse == 0)
     return;

#ifdef USE_SLANG_MOUSE
   SLtt_set_mouse_mode (state, 0);
   SLtt_flush_output ();
#else
#ifdef NCURSES_MOUSE_VERSION
     /* Inform ncurses that we're interested in knowing when mouse
      button 1 is clicked */
#ifndef _WINDOWS
   if (state)
     mousemask(BUTTON1_CLICKED, NULL);
   else
     mousemask(0, NULL);
#else
   if (state) mouse_set(BUTTON1_CLICKED && BUTTON2_CLICKED && BUTTON3_CLICKED);
#endif /* _WINDOWS */
#endif /* NCURSES_MOUSE_VERSION */

#if defined(DJGPP) && !defined(USE_SLANG)
     if (state)
       mouse_set(BUTTON1_CLICKED | BUTTON2_CLICKED | BUTTON3_CLICKED);
#endif
#endif				       /* NOT USE_SLANG_MOUSE */
}

PUBLIC void stop_curses NOARGS
{
    echo();
#ifdef DJGPP
		  sock_exit();
#endif
#if defined (DOSPATH) && !defined(USE_SLANG)
	 clrscr();
#else

    /*
     *	Fixed for better dumb terminal support.
     *	05-28-94 Lynx 2-3-1 Garrett Arch Blythe
     */
    if(LYCursesON == TRUE)	{
	 lynx_enable_mouse (0);
	 endwin();	/* stop curses */
    }

    fflush(stdout);
#endif /* DJGPP */
    fflush(stderr);

    LYCursesON = FALSE;

#if defined(SIGTSTP) && defined(USE_SLANG)
#ifndef VMS
   if (!no_suspend)
       signal(SIGTSTP, SIG_DFL);
#endif /* !VMS */
#endif /* SIGTSTP && USE_SLANG */

#ifndef VMS
    signal(SIGINT, SIG_DFL);
#endif /* !VMS */
}

#ifdef VMS
/*
 *  Check terminal type, start curses & setup terminal.
 */
PUBLIC BOOLEAN setup ARGS1(
	char *,		terminal)
{
    int c;
    int status;
    char *dummy, *cp, term[81];
#ifdef USE_SLANG
    extern void longname();
#endif /* USE_SLANG */

    /*
     *  If the display was not set by a command line option then
     *  see if it is available from the environment.
     */
    if ((display = getenv(DISPLAY)) != NULL && *display == '\0')
	display = NULL;

    /*
     *  Get terminal type, and convert to lower case.
     */
    term[0] = '\0';
    longname(dummy, term);
    if (term[0] == '\0' && (form_get_data || form_post_data)) {
	/*
	 *  Some yoyo used these under conditions which require
	 *  -dump, so force that mode here. - FM
	 */
	dump_output_immediately = TRUE;
	LYcols = 80;
	if (keypad_mode == NUMBERS_AS_ARROWS)
	    keypad_mode = LINKS_ARE_NUMBERED;
	status = mainloop();
	(void) signal (SIGHUP, SIG_DFL);
	(void) signal (SIGTERM, SIG_DFL);
#ifdef SIGTSTP
	if (no_suspend)
	  (void) signal(SIGTSTP,SIG_DFL);
#endif /* SIGTSTP */
	exit(status);
    }
    for (cp=term; *cp!='\0'; cp++)
	if (isupper(*cp))
	    *cp = TOLOWER(*cp);

    printf("Terminal = %s\n", term);
    sleep(InfoSecs);
    if ((strlen(term) < 5) ||
	strncmp(term, "vt", 2) || !isdigit(term[2])) {
	printf(
	    "You must use a vt100, 200, etc. terminal with this program.\n");
	printf("Proceed (n/y)? ");
	c = getchar();
	if (c != 'y' && c != 'Y') {
	    printf("\n");
	    return(FALSE);
	}
	strcpy(term,"vt100");
    }

    ttopen();
    start_curses();

    LYlines = LINES;
    LYcols = COLS;
    if (LYlines <= 0)
	LYlines = 24;
    if (LYcols <= 0)
	LYcols = 80;

    return(TRUE);
}

#else	/* Not VMS: */

/*
 *  Check terminal type, start curses & setup terminal.
 */
PUBLIC BOOLEAN setup ARGS1(
	char *,		terminal)
{
    static char term_putenv[120];
    char buffer[120];

   /*
    *  If the display was not set by a command line option then
    *  see if it is available from the environment .
    */
    if ((display = getenv(DISPLAY)) != NULL && *display == '\0')
	display = NULL;

    if (terminal != NULL) {
	sprintf(term_putenv,"TERM=%s",terminal);
	(void) putenv(term_putenv);
    }

    /*
     *  Query the terminal type.
     */
    if (dumbterm(getenv("TERM"))) {
	char *s;

	printf("\n\n  Your Terminal type is unknown!\n\n");
	printf("  Enter a terminal type: [vt100] ");
	*buffer = '\0';
	fgets(buffer, sizeof(buffer), stdin);
	if ((s = strchr(buffer, '\n')) != NULL)
	    *s = '\0';

	if (strlen(buffer) == 0)
	    strcpy(buffer,"vt100");

	sprintf(term_putenv,"TERM=%s", buffer);
	putenv(term_putenv);
	printf("\nTERMINAL TYPE IS SET TO %s\n",getenv("TERM"));
	sleep(MESSAGESECS);
    }

    start_curses();

#if HAVE_TTYTYPE
    /*
     *  Get terminal type (strip 'dec-' from vms style types).
     */
    if (strncmp((CONST char*)ttytype, "dec-vt", 6) == 0) {
	(void) setterm(ttytype + 4);
    }
#endif /* HAVE_TTYTYPE */

    LYlines = LINES;
    LYcols = COLS;
    if (LYlines <= 0)
	LYlines = 24;
    if (LYcols <= 0)
	LYcols = 80;

    return(1);
}

PRIVATE int dumbterm ARGS1(
	char *,		terminal)
{
    int dumb = FALSE;

    /*
     *	Began checking for terminal == NULL in case that TERM environemnt
     *	variable is not set.  Thanks to Dick Wesseling (ftu@fi.ruu.nl).
     */
    if (terminal == NULL ||
	!strcasecomp(terminal, "network") ||
	!strcasecomp(terminal, "unknown") ||
	!strcasecomp(terminal, "dialup")  ||
	!strcasecomp(terminal, "dumb")    ||
	!strcasecomp(terminal, "switch")  ||
	!strcasecomp(terminal, "ethernet")  )
	dumb = TRUE;
    return(dumb);
}

#ifdef FANCY_CURSES
#ifndef USE_COLOR_STYLE
#if USE_COLOR_TABLE
PUBLIC void LYaddWAttr ARGS2(
	WINDOW *,	win,
	int,		a)
{
    Current_Attr |= a;
    LYsetWAttr(win);
}

PUBLIC void LYaddAttr ARGS1(
	int,		a)
{
    LYaddWAttr(stdscr, a);
}

PUBLIC void LYsubWAttr ARGS2(
	WINDOW *,	win,
	int,		a)
{
    Current_Attr &= ~a;
    LYsetWAttr(win);
}

PUBLIC void LYsubAttr ARGS1(
	int,		a)
{
    LYsubWAttr(stdscr, a);
}
#endif
#endif /* USE_COLOR_STYLE */
#endif /* FANCY_CURSES */
#endif /* VMS */

PUBLIC void LYstartTargetEmphasis NOARGS
{
#if defined(FANCY_CURSES) || defined(USE_SLANG)
    start_bold();
    start_reverse();
#endif /* FANCY_CURSES || USE_SLANG */
    start_underline();
}

PUBLIC void LYstopTargetEmphasis NOARGS
{
    stop_underline();
#if defined(FANCY_CURSES) || defined(USE_SLANG)
    stop_reverse();
    stop_bold();
#endif /* FANCY_CURSES || USE_SLANG */
}

#ifdef VMS
/*
 *	Cut-down termio --
 *		Do character-oriented stream input for Jeff.
 *		Code ripped off from Micro-Emacs 3.7 by Daniel Lawrence.
 *
 *		Ever-so-slightly modified by Kathryn Huxtable.  29-Jan-1991.
 *		Cut down for Lou.  8 Sep 1992.
 *		Cut down farther for Lou.  19 Apr 1993.
 *			We don't set PASSALL or PASTHRU since we don't
 *			want to block CTRL/C, CTRL/Y, CTRL/S or CTRL/Q.
 *			Simply setting NOECHO and doing timed reads
 *			is sufficient.
 *              Further mods by Fote.  29-June-1993
 *			ttopen() and ttclose() are now terminal initialization
 *			 and restoration procedures, called once at startup
 *			 and at exit, respectively, of the LYNX image.
 *			ttclose() should be called before an exit from LYNX
 *			 no matter how the exit is invoked.
 *			setup(terminal) does the ttopen().
 *			cleanup() calls cleanup_files() and ttclose().
 *			ttgetc() now handles NOECHO and NOFLITR (instead of
 *			 setting the terminal itself to NOECHO in ttopen()).
 *			VMSsignal() added for handling both Ctrl-C *and* Ctrl-Y
 *			 interrupts, and disabling system response to Ctrl-T.
 *              Further mods by Fote.  15-Dec-1993
 *			Added edit handler in ttopen() which will invoke
 *			 VMSexit() and behave intelligently on ACCVIO's.
 *              Further mods by Fote.  29-Dec-1993
 *			Simplified ttgetc().
 *		Further mods by Fote.  16-Jan-1994
 *			Added code in ttopen() which will invoke VMSVersion()
 *			 to get the version of VMS as VersionVMS for use by
 *			 by new or modified interrupt or spawning routines.
 *		Further mods by Fote.  27-Jan-1994
 *			Added back a typeahead() which supports 'z' or 'Z' as
 *			an "Zap transfer" command via HTCheckForInterrupt()
 *			in LYUtils.c.
 */

#include <descrip.h>
#include <iodef.h>
#include <ssdef.h>
#include <stdlib.h>
#include <msgdef.h>
#include <ttdef.h>
#include <tt2def.h>
#include <libclidef.h>
#include <lib$routines.h>
#include <starlet.h>
#include <clidef.h>
#include <syidef.h>
#ifdef signal
#undef signal
#endif /* signal */
#include <signal.h>
#ifdef system
#undef system
#endif /* system */
#include <processes.h>
#include "LYVMSdef.h"

#define EFN	0			/* Event flag			*/

static	unsigned char buffer[20];	/* Input buffer			*/
static	int	in_pos, in_len;		/* For escape sequences		*/
static	int	oldmode[3];		/* Old TTY mode bits		*/
static	int	newmode[3];		/* New TTY mode bits		*/
static	short	iochan;			/* TTY I/O channel		*/
static  $DESCRIPTOR(term_nam_dsc,"TT"); /* Descriptor for iochan	*/
static	unsigned long mask = LIB$M_CLI_CTRLY|LIB$M_CLI_CTRLT; /* ^Y and ^T */
static	unsigned long old_msk;		/* Saved control mask		*/
static	short	trap_flag = FALSE;	/* TRUE if AST is set		*/
BOOLEAN DidCleanup = FALSE;		/* Exit handler flag		*/
static char VersionVMS[20];		/* Version of VMS		*/

PUBLIC int VMSVersion ARGS2(
	char *,		VerString,
	int,		VerLen)
{
     unsigned long status, itm_cod = SYI$_VERSION;
     int i, verlen = 0;
     struct dsc$descriptor version;
     char *m;

     version.dsc$a_pointer = VerString;
     version.dsc$w_length = VerLen - 1;
     version.dsc$b_dtype = DSC$K_DTYPE_B;
     version.dsc$b_class = DSC$K_CLASS_S;

     status = lib$getsyi(&itm_cod, 0, &version, &verlen, 0, 0);
     if (!(status&1) || verlen == 0)
	  return 0;

     /*
      *  Cut out trailing spaces
      */
     for (m = VerString+verlen, i = verlen-1; i > 0 && VerString[i] == ' '; --i)
	  *(--m) = '\0';

     return strlen(VerString)+1;	/* Transmit ending 0 too */
}

PUBLIC void VMSexit NOARGS
{
    /*
     *  If we get here and DidCleanup is not set, it was via an
     *  ACCVIO, or outofmemory forced exit, so make *sure* we
     *  attempt a cleanup and reset the terminal.
     */
    if (!DidCleanup) {
	if (LYOutOfMemory == FALSE) {
	    fprintf(stderr,
"\nA Fatal error has occured in %s Ver. %s\n", LYNX_NAME, LYNX_VERSION);
	    fprintf(stderr,
"\nPlease notify your system administrator to confirm a bug, and if\n");
	    fprintf(stderr,
"confirmed, to notify the lynx-dev list.  Bug reports should have concise\n");
	    fprintf(stderr,
"descriptions of the command and/or URL which causes the problem, the\n");
	    fprintf(stderr,
"operating system name with version number, the TCPIP implementation, the\n");
	    fprintf(stderr,
"TRACEBACK if it can be captured, and any other relevant information.\n");

	    if (LYTraceLogFP == NULL) {
		fprintf(stderr,"\nPress RETURN to clean up: ");
		(void) getchar();
	    }
	} else if (LYCursesON) {
	    _statusline(MEMORY_EXHAUSTED_ABORT);
	    sleep(AlertSecs);
	}
	cleanup();
    }
    if (LYOutOfMemory == TRUE) {
	printf("\r\n%s\r\n\r\n", MEMORY_EXHAUSTED_ABORT);
	fflush(stdout);
	fflush(stderr);
    }
    *stderr = LYOrigStderr;
}

/*
 *	TTOPEN --
 *		This function is called once to set up the terminal
 *		device streams.	 It translates TT until it finds
 *		the terminal, then assigns a channel to it, sets it
 *		to EDIT, and sets up the Ctrl-C and Ctrl-Y interrupt
 *		handling.
 */
PUBLIC int ttopen NOARGS
{
	extern	void cleanup_sig();
	int	iosb[2];
	int	status;
	static unsigned long condition;
	static struct _exit_block {
	    unsigned long forward;
	    unsigned long address;
	    unsigned long zero;
	    unsigned long condition;
	} exit_handler_block;

	status = sys$assign( &term_nam_dsc, &iochan, 0, 0 );
	if( status != SS$_NORMAL )
		exit( status );

	status = sys$qiow( EFN, iochan, IO$_SENSEMODE, &iosb, 0, 0,
			  &oldmode, sizeof(oldmode), 0, 0, 0, 0 );
	if( status != SS$_NORMAL )
		exit( status );

	status = iosb[0] & 0xFFFF;
	if( status != SS$_NORMAL )
		exit( status );

	newmode[0] = oldmode[0];
	newmode[1] = oldmode[1];
	newmode[2] = oldmode[2] | TT2$M_EDIT;

	status = sys$qiow( EFN, iochan, IO$_SETMODE, &iosb, 0, 0,
			  &newmode, sizeof(newmode), 0, 0, 0, 0 );
	if( status != SS$_NORMAL )
		exit( status );

	status = iosb[0] & 0xFFFF;
	if( status != SS$_NORMAL )
		exit( status );

	/*
	 *  Declare the exit handler block.
	 */
	exit_handler_block.forward   = 0;
	exit_handler_block.address   = (unsigned long) &VMSexit;
	exit_handler_block.zero      = 0;
	exit_handler_block.condition = (unsigned long) &condition;
	status = sys$dclexh(&exit_handler_block);
	if (status != SS$_NORMAL)
		exit( status );

	/*
	 *  Set the AST.
	 */
	lib$disable_ctrl(&mask, &old_msk);
	trap_flag = TRUE;
	status = sys$qiow ( EFN, iochan,
			    IO$_SETMODE|IO$M_CTRLCAST|IO$M_CTRLYAST,
			    &iosb, 0, 0,
			    &cleanup_sig, SIGINT, 0, 0, 0, 0 );
	if ( status != SS$_NORMAL ) {
		lib$enable_ctrl(&old_msk);
		exit ( status );
	}

	/*
	 *  Get the version of VMS.
	 */
	if (VMSVersion(VersionVMS, 20) < 3)
		/*
		 *  Load zeros on error.
		 */
		strcpy(VersionVMS, "V0.0-0");

	return(0);
}	/*  ttopen  */

/*
 *	TTCLOSE --
 *		This function gets called just before we go back home
 *		to the command interpreter.  It puts the terminal back
 *		in a reasonable state.
 */
PUBLIC int ttclose NOARGS
{
	int	status;
	int	iosb[1];

	status = sys$qiow( EFN, iochan, IO$_SETMODE, &iosb, 0, 0,
			  &oldmode, sizeof(oldmode), 0, 0, 0, 0 );

	if( status != SS$_NORMAL || (iosb[0] & 0xFFFF) != SS$_NORMAL )
		exit( status );

	if (trap_flag) {
	    status = sys$dassgn (iochan);
	    status = lib$enable_ctrl(&old_msk);
	    trap_flag = FALSE;
	}
	return(0);
}	/*  ttclose  */

/*
 *	TTGETC --
 *		Read a character from the terminal, with NOECHO and NOFILTR.
 */
PUBLIC int ttgetc NOARGS
{
    int status;
    unsigned short iosb[4];

    if (in_pos < in_len)
	return(buffer[in_pos++]);

    status = sys$qiow(EFN, iochan,
		      IO$_READVBLK|IO$M_NOECHO|IO$M_NOFILTR,
		      &iosb, 0, 0,
		      &buffer, 1, 0, 0, 0, 0);
    if ((status&1) == 1)
	status = iosb[0];
    if (status == SS$_PARTESCAPE) {
	/*
	 *  Escape sequence in progress.  Fake a successful read.
	 */
	status = 1;
    }
    if ((status&1) != 1 && status != SS$_DATAOVERUN)
	exit(status);
    in_pos = 1;
    in_len = iosb[1] + iosb[3];
    return(buffer[0]);
}

/*
 *	TYPEAHEAD -- Fote Macrides 27-Jan-1994
 *		Check whether a keystroke has been entered, and return
 *		 it, or -1 if none was entered.
 */
PUBLIC int typeahead NOARGS
{
    int status;
    unsigned short iosb[4];

    if (dump_output_immediately)
	return -1;

    if (in_pos < in_len)
	return(buffer[in_pos++]);

again:
    status = sys$qiow (EFN, iochan,
		       IO$_READVBLK|IO$M_TIMED|IO$M_NOECHO|IO$M_NOFILTR,
		       &iosb, 0, 0,
		       &buffer, 1, 0, 0, 0, 0);
    if ((status&1) == 1)
	status = iosb[0];
    if (status == SS$_PARTESCAPE) {
	/*
	 *  Escape sequence in progress, finish reading it.
	 */
	goto again;
    }

    in_pos = 1;
    in_len = iosb[1] + iosb[3];
    if (status == SS$_TIMEOUT || status == SS$_DATAOVERUN)
	return(-1);
    return (buffer[0]);
}

/*
 *	VMSSIGNAL -- Fote Macrides 29-Jun-1993
 *		Sets up AST for both Ctrl-C and Ctrl-Y, with system response
 *		 to Ctrl-T disabled.  If called with a sig other than SIGINT,
 *		 it will use the C library's system(sig, func).
 *              The equivalent of VMSsignal(SIGINT, cleanup_sig) is done on
 *               intialization by ttopen(), so don't do it again.
 *		VMSsignal(SIGINT, SIG_DFL) is treated as a call to ttclose().
 *              Call VMSsignal(SIGINT, SIG_IGN) before system() calls to
 *               enable Ctrl-C and Ctrl-Y in the subprocess, and then call
 *               VMSsignal(SIG_INT, cleanup_sig) on return from the subprocess.
 *		For func's which set flags and do not invoke an exit from
 *		 LYNX, the func should reassert itself.
 *              The VMS signal() calls do not fully emulate the Unix calls,
 *		 and VMSsignal() is just a "helper", also not a full emulation.
 */

PUBLIC void *VMSsignal (sig,func)
int sig;
void (*func)();
{
	int status;
	short iosb[4];
	static int SIG_IGN_flag;

	/*
	 *  Pass all signals other than SIGINT to signal().
	 *  Also pass SIGINT to signal() if we're dumping.
	 */
	if (sig != SIGINT || dump_output_immediately) {
	    signal(sig, func);
	    return;
	}

	/*
	 *  If func is SIG_DFL, treat it as ttclose().
	 */
	if (func == SIG_DFL) {
	    ttclose();
	    return;
	}

	/*
	 *  Clear any previous AST.
	 */
	if (trap_flag) {
	    status = sys$dassgn (iochan);
	    status = lib$enable_ctrl(&old_msk);
	    trap_flag = FALSE;
	}

	/*
	 *  If func is SIG_IGN, leave the TT channel closed and the
	 *  system response to interrupts enabled for system() calls.
	 */
	if (func == SIG_IGN)
	    return;

	/*
	 *  If we get to here, we have a LYNX func, so set the AST.
	 */
	lib$disable_ctrl(&mask, &old_msk);
	trap_flag = TRUE;
	status = sys$assign (&term_nam_dsc, &iochan, 0, 0 );
	status = sys$qiow ( EFN, iochan,
			    IO$_SETMODE|IO$M_CTRLCAST|IO$M_CTRLYAST,
			    &iosb, 0, 0,
			    func, SIGINT, 0, 0, 0, 0 );

}	/* VMSsignal */

/*
 *  DCLspawn_exception, spawn_DCLprocess, DCLsystem -- F.Macrides 16-Jan-1994
 *	Exception-handler routines for regulating interrupts and enabling
 *	Control-T during spawns.  Includes TRUSTED flag for versions of VMS
 *	which require it in captive accounts.  This code should be used
 *	instead of the VAXC or DECC system(), by including LYSystem.h in
 *	modules which have system() calls.  It helps ensure that we return
 *	to Lynx instead of breaking out to DCL if a user issues interrupts
 *	or generates an ACCVIO during spawns.
 */
#ifdef __DECC
PRIVATE unsigned int DCLspawn_exception ARGS2(
	void *,		sigarr,
	void *,		mecharr)
{
#else
PRIVATE int DCLspawn_exception ARGS2(
	void *,		sigarr,
	void *,		mecharr)
{
#endif /* __DECC */
     int status;

     status = lib$sig_to_ret(sigarr, mecharr);
     return(SS$_UNWIND);
}

PRIVATE int spawn_DCLprocess ARGS1(
	char *,		command)
{
     int status;
     unsigned long Status = 0;
     /*
      *  Keep DECC from complaining.
      */
     struct dsc$descriptor_s  command_desc;
     command_desc.dsc$w_length  = strlen(command);
     command_desc.dsc$b_class   = DSC$K_CLASS_S;
     command_desc.dsc$b_dtype   = DSC$K_DTYPE_T;
     command_desc.dsc$a_pointer = command;

     VAXC$ESTABLISH(DCLspawn_exception);

#ifdef __ALPHA /** OpenVMS/AXP lacked the TRUSTED flag before v6.1 **/
     if (VersionVMS[1] > '6' ||
	 (VersionVMS[1] == '6' && VersionVMS[2] == '.' &&
	  VersionVMS[3] >= '1')) {
#else
     if (VersionVMS[1] >= '6') {
#endif /* __ALPHA */
	 /*
	  *  Include TRUSTED flag.
	  */
	 unsigned long trusted = CLI$M_TRUSTED;
	 status = lib$spawn(&command_desc,0,0,&trusted,
			    0,0,&Status);
	 /*
	  *  If it was invalid, try again without the flag.
	  */
	 if (status == LIB$_INVARG)
	    status = lib$spawn(&command_desc,0,0,0,
			       0,0,&Status );
     } else
	 status = lib$spawn(&command_desc,0,0,0,
			    0,0,&Status);
     /*
      *  Return -1 on error.
      */
     if ((status&1) != 1 || (Status&1) != 1)
	 return(-1);
     /*
      *  Return 0 on success.
      */
     return(0);
}

PUBLIC int DCLsystem ARGS1(
	char *,		command)
{
     int status;
     extern void controlc();

     VMSsignal(SIGINT, SIG_IGN);
     status = spawn_DCLprocess(command);
     VMSsignal(SIGINT, cleanup_sig);
     /*
      *  Returns 0 on success, -1 any error.
      */
     return(status);
}

#ifndef USE_SLANG
/*
**  This function boxes windows with graphic characters for curses.
**  Pass it the window, it's height, and it's width. - FM
*/
PUBLIC void VMSbox ARGS3(
	WINDOW *,	win,
	int,		height,
	int,		width)
{
    int i;

    wmove(win, 0, 0);
    waddstr(win, "\033)0\016l");
    for (i = 1; i < width; i++)
       waddch(win, 'q');
    waddch(win, 'k');
    for (i = 1; i < height-1; i++) {
	wmove(win, i, 0);
	waddch(win, 'x');
	wmove(win, i, width-1);
	waddch(win, 'x');
    }
    wmove(win, i, 0);
    waddch(win, 'm');
    for (i = 1; i < width; i++)
       waddch(win, 'q');
    waddstr(win, "j\017");
}
#endif /* !USE_SLANG */
#endif /* VMS */

PUBLIC void lynx_force_repaint NOARGS
{
#if defined(COLOR_CURSES)
    chtype a = (LYShowColor >= SHOW_COLOR_ON) ? COLOR_PAIR(9) : A_NORMAL;
    bkgdset(a | ' ');
    bkgd(a | ' ');
    attrset(a);
#endif
    clearok(curscr, TRUE);
}

PUBLIC void lynx_start_underline_color NOARGS
{
    start_underline ();
}

PUBLIC void lynx_stop_underline_color NOARGS
{
    stop_underline ();
}

PUBLIC void lynx_start_bold_color NOARGS
{
    start_bold ();
}

PUBLIC void lynx_stop_bold_color NOARGS
{
    stop_bold ();
}

PUBLIC void lynx_start_title_color NOARGS
{
}

PUBLIC void lynx_stop_title_color NOARGS
{
}

PUBLIC void lynx_start_link_color ARGS2(
	int,	flag,
	int,	pending)
{
    if (flag) {
	/* makes some terminals work wrong because
	 * they can't handle two attributes at the
	 * same time
	 */
	/* start_bold();  */
	start_reverse();
#if defined(USE_SLANG)
	if (SLtt_Use_Ansi_Colors)
	    start_underline ();
#endif /* USE_SLANG */
#if defined(FANCY_CURSES)
	start_underline ();
#endif /* USE_SLANG */
     } else {
	start_bold();
	/*
	 *  Make sure when flag is OFF that "unhighlighted" links
	 *  will be underlined if appropriate. - LE & FM
	 */
	if (pending)
	    start_underline();
     }
}

PUBLIC void lynx_stop_link_color ARGS2(
	int,	flag,
	int,	pending)
{
#ifdef USE_COLOR_STYLE
    LynxChangeStyle(flag == ON ? s_alink : s_a, ABS_OFF, 0);
#else
    if (flag) {
	stop_reverse();
#if defined(USE_SLANG)
	if (SLtt_Use_Ansi_Colors)
	stop_underline ();
#endif /* USE_SLANG */
#if defined(FANCY_CURSES)
	stop_underline ();
#endif /* USE_SLANG */
    } else {
	stop_bold();
	/*
	 *  If underlining was turned on above, turn it off. - LE & FM
	 */
	if (pending)
	    stop_underline();
    }
#endif
}


PUBLIC void lynx_stop_target_color NOARGS
{
   stop_underline();
   stop_reverse();
   stop_bold();
}

PUBLIC void lynx_start_target_color NOARGS
{
   start_bold();
   start_reverse();
   start_underline();
}


PUBLIC void lynx_start_status_color NOARGS
{
#if USE_COLOR_TABLE && defined(COLOR_CURSES)
    if (lynx_uses_color && LYShowColor >= SHOW_COLOR_ON)
	lynx_set_color (2);
    else
#endif
	start_reverse ();
}

PUBLIC void lynx_stop_status_color NOARGS
{
#if USE_COLOR_TABLE && defined(COLOR_CURSES)
    if (lynx_uses_color && LYShowColor >= SHOW_COLOR_ON)
	lynx_set_color (0);
    else
#endif
	stop_reverse ();
}

PUBLIC void lynx_start_h1_color NOARGS
{
   if (bold_H1 || bold_headers)
     start_bold();
}

PUBLIC void lynx_stop_h1_color NOARGS
{
   if (bold_H1 || bold_headers)
     stop_bold();
}

PUBLIC void lynx_start_prompt_color NOARGS
{
   start_reverse ();
}

PUBLIC void lynx_stop_prompt_color NOARGS
{
   stop_reverse ();
}

PUBLIC void lynx_start_radio_color NOARGS
{
   start_bold ();
}

PUBLIC void lynx_stop_radio_color NOARGS
{
   stop_bold ();
}

PUBLIC void lynx_stop_all_colors NOARGS
{
   stop_underline ();
   stop_reverse ();
   stop_bold ();
}