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guitcap.c
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guitcap.c
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/* guitcap.c */
#include "elvis.h"
#ifdef GUI_TERMCAP
#include <signal.h>
/* This file contains a termcap-based user interface. It is derived from the
* "curses.c" file of elvis 1.8.
*/
#define MINHEIGHT 4
/* Some termcap packages require the application code to supply a "BC"
* variable. Others (particularly ncurses) forbid it. The nice ones
* supply one if you don't, so they'll work either way.
*/
#ifdef NEED_BC
char *BC; /* :bc=: move cursor left */
#else
extern char *BC; /* :bc=: move cursor left */
#endif
/* HP-UX, and maybe some others, require the application code to supply
* an "ospeed" variable.
*/
#ifdef NEED_OSPEED
# ifdef NEED_SPEED_T
speed_t ospeed;
# else
short ospeed;
# endif
#endif
/* This macro is used to reset attributes and colors to normal values. */
#define revert(tw) if ((tw) == current)\
change(colorinfo[COLOR_FONT_NORMAL].fg,\
colorinfo[COLOR_FONT_NORMAL].bg,\
colorinfo[COLOR_FONT_NORMAL].da.bits);\
else\
change(colorinfo[COLOR_FONT_IDLE].fg,\
colorinfo[COLOR_FONT_IDLE].bg,\
colorinfo[COLOR_FONT_IDLE].da.bits)
/* Structs of this type are used to remember the location and size of each
* window. In the termcap interface, all windows must be as wide as the
* screen, and the sum of all windows' heights must equal the screen size.
*/
typedef struct twin_s
{
struct twin_s *next; /* some other window on this screen */
int height; /* size of the window */
int pos; /* position of the window */
int newheight; /* height after screen is rearranged */
int newpos; /* position after screen is rearranged */
int cursx, cursy; /* logical cursor position */
ELVCURSOR shape; /* logical cursor shape */
} TWIN;
static TWIN *twins; /* list of windows */
static TWIN *current; /* window with keyboard focus */
#if USE_PROTOTYPES
static ELVBOOL clrtoeol(GUIWIN *gw);
static ELVBOOL color(int fontcode, CHAR *colornam, ELVBOOL isfg, long *colorptr, unsigned char rgb[3]);
static ELVBOOL creategw(char *name,char * attributes);
static ELVBOOL focusgw(GUIWIN *gw);
static ELVBOOL scroll(GUIWIN *gw, int qty, ELVBOOL notlast);
static ELVBOOL shift(GUIWIN *gw, int qty, int rows);
static ELVBOOL tabcmd(GUIWIN *gw, _CHAR_ key2, long count);
static char *manynames(char *names);
static int init(int argc, char **argv);
static int keylabel(CHAR *given, int givenlen, CHAR **label, CHAR **rawptr);
static int test(void);
static int ttych(int ch);
static void beep(GUIWIN *gw);
static void destroygw(GUIWIN *gw, ELVBOOL force);
static void drawgraphic(GUIWIN *gw, long fg, long bg, int bits, CHAR *text, int len);
static void draw(GUIWIN *gw, long fg, long bg, int bits, CHAR *text, int len);
#ifdef FEATURE_SPLIT
static void drawborder(TWIN *tw);
#endif
static void endtcap(void);
static void flush(void);
static void loop(void);
static void mayhave(char **T, char *s);
static void movecurs(TWIN *tw);
static void moveto(GUIWIN *gw, int column, int row);
static void musthave(char **T, char *s);
static void pair(char **T, char **U, char *sT, char *sU);
static void change(long fg, long bg, int bits);
static void starttcap(void);
static void term(void);
static void ttyflush(void);
static void ttygetsize(void);
static ELVBOOL ttyprgopen(char *command, ELVBOOL willwrite, ELVBOOL willread);
static int ttyprgclose(void);
static RESULT stop(ELVBOOL alwaysfork);
#endif
static void reset P_((void));
static void chgsize P_((TWIN *tw, int newheight, ELVBOOL winch));
static void cursorshape P_((ELVCURSOR shape));
/* termcap values */
static ELVBOOL AM; /* :am: boolean: auto margins? */
static ELVBOOL PT; /* :pt: boolean: physical tabs? */
char PC; /* :pc=: pad character (not a string var!) */
static char *VB; /* :vb=: visible bell */
char *UP; /* :up=: move cursor up */
static char *AF; /* :AF=: change the foreground color */
static char *SO; /* :so=: standout start */
static char *SE; /* :se=: standout end */
static char *US; /* :us=: underline start */
static char *UE; /* :ue=: underline end */
static char *MD; /* :md=: bold start */
static char *ME; /* :me=: bold and half-bright end */
static char *MH; /* :mh=: half-bright start */
static char *CM; /* :cm=: cursor movement */
static char *DO; /* :do=: move down one line */
static char *DOmany; /* :DO=: move down many lines */
static char *CE; /* :ce=: clear to end of line */
static char *AL; /* :al=: add a line */
static char *ALmany; /* :AL=: add many lines */
static char *DL; /* :dl=: delete a line */
static char *DLmany; /* :DL=: delete many lines */
static char *SRev; /* :sr=: scroll reverse */
static char *KS; /* :ks=: init string for cursor */
static char *KE; /* :ke=: restore string for cursor */
static char *IC; /* :ic=: insert following char */
static char *ICmany; /* :IC=: insert many characters */
static char *DC; /* :dc=: delete a character */
static char *DCmany; /* :DC=: delete many characters */
static char *TI; /* :ti=: terminal init */
static char *TE; /* :te=: terminal exit */
static char *SC; /* :sc=: save cursor position & attribute */
static char *RC; /* :rc=: restore cursor position & attribute */
static char *CQ; /* :cQ=: normal cursor */
static char *CX; /* :cX=: cursor used for EX command/entry */
static char *CV; /* :cV=: cursor used for VI command mode */
static char *CI; /* :cI=: cursor used for VI input mode */
static char *CR; /* :cR=: cursor used for VI replace mode */
#ifdef FEATURE_MISC
static char *GS; /* :GS=:as=: start graphic character mode */
static char *GE; /* :GE=:ae=: end graphic character mode */
static char GC_V; /* vertical bar character */
static char GC_H; /* horizontal bar character */
static char GC_1; /* lower left corner character */
static char GC_2; /* horizontal line with up-tick character */
static char GC_3; /* lower right corner character */
static char GC_4; /* vertical line with right-tick character */
static char GC_5; /* center cross character */
static char GC_6; /* vertical line with left-tick character */
static char GC_7; /* upper left corner character */
static char GC_8; /* horizontal line with down-tick character */
static char GC_9; /* upper right corner character */
#endif
/* This is a table of keys which should be mapped, if present */
static struct
{
char *label; /* keytop legend of the key */
char *capnames; /* name(s) of the key's capability */
char *cooked; /* what the key should map to (if anything) */
MAPFLAGS flags; /* when the map should be effective */
char *rawin; /* raw characters sent by key */
}
keys[] =
{
{"<Up>", "ku", "k", MAP_NOSAVE|MAP_ALL},
{"<Down>", "kd", "j", MAP_NOSAVE|MAP_ALL},
{"<Left>", "kl", "h", MAP_NOSAVE|MAP_ALL},
{"<Right>", "kr", "l", MAP_NOSAVE|MAP_ALL},
{"<PgUp>", "PUkPk2", "\002", MAP_NOSAVE|MAP_ALL},
{"<PgDn>", "PDkNk5", "\006", MAP_NOSAVE|MAP_ALL},
{"<Home>", "HMkhK1", "^", MAP_NOSAVE|MAP_ALL},
{"<End>", "ENkHK5@7", "$", MAP_NOSAVE|MAP_ALL},
{"<Insert>", "kI", "i", MAP_NOSAVE|MAP_ALL},
#ifdef FEATURE_MISC
{"<Delete>", "kD", "x", MAP_NOSAVE|MAP_ALL},
{"<Compose>", "k+", "\013", MAP_NOSAVE|MAP_INPUT},
{"<C-Left>", "#4KL", "B", MAP_NOSAVE|MAP_ALL},
{"<C-Right>", "%iKR", "W", MAP_NOSAVE|MAP_ALL},
{"<S-Tab>", "kB", "g\t", MAP_NOSAVE|MAP_COMMAND},
#endif
{"#1", "k1"},
{"#2", "k2"},
{"#3", "k3"},
{"#4", "k4"},
{"#5", "k5"},
{"#6", "k6"},
{"#7", "k7"},
{"#8", "k8"},
{"#9", "k9"},
{"#10", "k0kak;"},
#ifdef FEATURE_MISC
{"#11", "F1"},
{"#12", "F2"},
{"#1s", "s1F3"},
{"#2s", "s2F4"},
{"#3s", "s3F5"},
{"#4s", "s4F6"},
{"#5s", "s5F7"},
{"#6s", "s6F8"},
{"#7s", "s7F9"},
{"#8s", "s8FA"},
{"#9s", "s9FB"},
{"#10s", "s0FC"},
{"#11s", "FD"},
{"#12s", "FE"},
{"#1c", "c1FF"},
{"#2c", "c2FG"},
{"#3c", "c3FH"},
{"#4c", "c4FI"},
{"#5c", "c5FJ"},
{"#6c", "c6FK"},
{"#7c", "c7FL"},
{"#8c", "c8FM"},
{"#9c", "c9FN"},
{"#10c", "c0FO"},
{"#11c", "FP"},
{"#12c", "FQ"},
{"#1a", "a1"},
{"#2a", "a2"},
{"#3a", "a3"},
{"#4a", "a4"},
{"#5a", "a5"},
{"#6a", "a6"},
{"#7a", "a7"},
{"#8a", "a8"},
{"#9a", "a9"},
{"#10a", "a0"}
#endif
};
/* These are GUI-dependent global options */
static OPTDESC goptdesc[] =
{
{"term", "ttytype", optsstring, optisstring},
{"ttyrows", "ttylines", optnstring, optisnumber},
{"ttycolumns", "ttycolumns", optnstring, optisnumber},
{"ttyunderline", "ttyu", NULL, NULL },
{"ttyitalic", "ttyi", NULL, NULL },
{"ttywrap", "ttyw", NULL, NULL }
};
struct ttygoptvals_s ttygoptvals;
/*----------------------------------------------------------------------------*/
/* These are mid-level terminal I/O functions. They buffer the output, but
* don't do much more than that.
*/
static char ttybuf[1500]; /* the output buffer */
static int ttycount; /* number of characters in ttybuf */
static char ttyerasekey; /* taken from the ioctl structure */
long ttycaught; /* bitmap of recently-received signals */
/* This indicates whether we've found the termcap entry yet */
static int gotentry = 0;
/* This function writes the contents of ttybuf() to the screen */
static void ttyflush()
{
if (ttycount > 0)
{
ttywrite(ttybuf, ttycount);
ttycount = 0;
}
}
/* This function is used internally. It is passed to the tputs() function
* which uses it to output individual characters. This function saves the
* characters in a buffer and outputs them in a bunch.
*/
static int ttych(ch)
int ch; /* character to be output */
{
ttybuf[ttycount++] = ch;
if (ttycount >= QTY(ttybuf))
ttyflush();
#ifndef NDEBUG
ttybuf[ttycount] = '\0';
#endif
return ch;
}
/* These store masks for resetting COLOR_XXX attribute bits. Although each
* of these is intended to reset only its own attribute bits, it is possible
* that some terminals will use a single string for resetting multiple
* attributes, so the masks must be computed at run time, after the termcap
* entry has been read.
*/
static int UEmask; /* attributes reset by :ue=: -- normally UNDERLINE */
static int SEmask; /* attributes reset by :se=: -- normally SET (standout) */
static int MEmask; /* attributes reset by :me=: -- normally BOLD and ITALIC */
static ELVBOOL fgcolored; /* have foreground colors been set? */
static ELVBOOL bgcolored; /* have background colors been set? */
static long currentfg; /* foreground color code */
static long currentbg; /* background color code */
static int currentbits; /* bitmap of other attributes */
static int viscreen; /* is terminal switched to edit screen yet? */
/* Change attributes. The color support assumes your terminal is ANSI-like
* (which is safe since color() only allows you to set colors for ANSI-like
* terminals) but the rest of the code is purely termcap-driven.
*/
static void change(fg, bg, bits)
long fg; /* new foreground color, if fgcolored */
long bg; /* new background color, if bgcolored */
int bits; /* attribute bits */
{
char ansicolor[50];
int resetting, setting;
/* Don't change colors while the other screen is being displayed */
if (!viscreen)
return;
/* If foreground is set to a bright color, then we want to convert it
* to either white + bold (if bold was already set), or
* to a dim color + bold (if bold wasn't set already).
*/
if (fgcolored && fg >= 10)
{
if (bits & COLOR_BOLD)
fg = 7;
else
fg -= 10, bits |= COLOR_BOLD;
}
/* Italic is disabled if "nottyitalic" */
if (!o_ttyitalic)
bits &= ~COLOR_ITALIC;
/* Italics are shown via underlining, if there is no :mh=: string */
if (!MH && (bits & COLOR_ITALIC))
bits = (bits & ~COLOR_ITALIC) | COLOR_UNDERLINED;
/* Underlining is disabled if "nottyunderline" and we have bg color */
/* If "nottyitalic", then never use underline ever */
if (!o_ttyunderline && (!o_ttyitalic || bgcolored))
bits &= ~COLOR_UNDERLINED;
/* Termcap doesn't allow bold & italics to mix. If attempting to mix,
* then use plain bold.
*/
if ((bits & (COLOR_BOLD|COLOR_ITALIC)) == (COLOR_BOLD|COLOR_ITALIC))
bits &= ~COLOR_ITALIC;
/* Okay, we are finally ready to begin outputting escape sequences.
* This proceeds in three phases: First we turn off any attributes
* that must be off, then we change colors, and finally we turn on
* any attributes which should be on. We do it this way because
* sometimes turning off an attribute will affect colors or other
* attributes.
*/
/* Decide which attributes to turn off. */
resetting = currentbits & ~bits;
if ((resetting & (COLOR_BOLD|COLOR_ITALIC)) && ME)
{
tputs(ME, 1, ttych);
currentbits &= MEmask;
currentfg = currentbg = -1;
}
if ((resetting & COLOR_UNDERLINED) && UE)
{
tputs(UE, 1, ttych);
currentbits &= UEmask;
currentfg = currentbg = -1;
}
if ((resetting & (COLOR_BOXED|COLOR_LEFTBOX|COLOR_RIGHTBOX)) && SE)
{
tputs(SE, 1, ttych);
currentbits &= SEmask;
currentfg = currentbg = -1;
}
/* Change foreground, if set & different */
if (fgcolored && fg != currentfg)
{
/* Try to fold bold & bg into the change */
if (bgcolored && bg != currentbg)
{
if (bg < 8)
sprintf(ansicolor, "\033[%ld;%ld%sm", bg + 40,
fg + 30, bits & COLOR_BOLD ? ";1" : "");
else
{
sprintf(ansicolor, "\033[m\033[%ld%sm",
fg + 30, bits & COLOR_BOLD ? ";1" : "");
currentbits = 0;
}
tputs(ansicolor, 1, ttych);
currentbits |= (bits & COLOR_BOLD);
currentbg = bg;
}
else
{
sprintf(ansicolor, "\033[%ld%sm",
fg + 30, bits & COLOR_BOLD ? ";1" : "");
tputs(ansicolor, 1, ttych);
currentbits |= (bits & COLOR_BOLD);
}
currentfg = fg;
}
/* Change background, if set & different */
if (bgcolored && bg != currentbg)
{
/* Just change the background */
if (bg < 8)
sprintf(ansicolor, "\033[%ldm", bg + 40);
else
{
strcpy(ansicolor, "\033[m");
currentbits = 0;
}
tputs(ansicolor, 1, ttych);
currentbg = bg;
}
/* Set attributes */
setting = bits & ~currentbits;
if ((setting & COLOR_BOLD) && MD)
tputs(MD, 1, ttych);
if ((setting & COLOR_ITALIC) && MH)
tputs(MH, 1, ttych);
if ((setting & COLOR_UNDERLINED) && US)
tputs(US, 1, ttych);
if ((setting & (COLOR_BOXED|COLOR_LEFTBOX|COLOR_RIGHTBOX)) && SO)
tputs(SO, 1, ttych);
currentbits = bits;
}
/* Send any required termination strings. Turn off "raw" mode. */
void ttysuspend()
{
/* revert to the normal font */
revert(NULL);
/* restore some things */
if (CQ) tputs(CQ, 1, ttych); /* restore cursor shape */
if (TE) tputs(TE, 1, ttych); /* restore terminal mode/page */
viscreen = 0;
if (KE) tputs(KE, 1, ttych); /* restore keypad mode */
if (RC) tputs(RC, 1, ttych); /* restore cursor & attributes */
/* no cursor movement for terminals with te capability */
if (!TE)
{
/* Move the cursor to the bottom of the screen */
tputs(tgoto(CM, 0, (int)o_ttyrows - 1), 0, ttych);
ttych('\n');
}
ttyflush();
/* change the terminal mode back the way it was */
ttynormal();
}
/* Put the terminal in RAW mode. Send any required strings */
void ttyresume(sendstr)
ELVBOOL sendstr; /* send strings? */
{
/* change the terminal mode to cbreak/noecho */
ttyerasekey = ELVCTRL('H');/* the default */
ttyraw(&ttyerasekey);
/* send the initialization strings */
if (sendstr)
{
ttych('\r');
tputs(CE, (int)o_ttycolumns, ttych);
if (TI) tputs(TI, 1, ttych);
viscreen = 1;
if (KS) tputs(KS, 1, ttych);
}
/* reset, so we don't try any suspicious optimizations */
reset();
}
/* This function determines the screen size. It does this by calling the
* OS-dependent ttysize() function if possible, or from the termcap entry
* otherwise.
*/
static void ttygetsize()
{
int lines;
int cols;
char *tmp;
/* get the window size, one way or another. */
lines = cols = 0;
if (!ttysize(&lines, &cols) || lines < 2 || cols < 30)
{
/* get lines from $LINES or :li#: */
tmp = getenv("LINES");
if (tmp)
lines = atoi(tmp);
else
lines = tgetnum("li");
if (lines <= 0)
lines = 24;
/* get columns from $COLUMNS or :co#: */
tmp = getenv("COLUMNS");
if (tmp)
cols = atoi(tmp);
else
cols = tgetnum("co");
if (cols <= 0)
cols = 80;
}
/* did we get a realistic value? */
if (lines >= 2 && cols >= 30)
{
o_ttyrows = lines;
o_ttycolumns = cols;
}
optflags(o_ttyrows) |= OPT_HIDE;
optflags(o_ttycolumns) |= OPT_HIDE;
}
/* end of low-level terminal control */
/*----------------------------------------------------------------------------*/
/* start of termcap operations */
static char *capbuf;/* used for allocation space for termcap strings */
/* This function fetches an optional string from termcap */
static void mayhave(T, s)
char **T; /* where to store the returned pointer */
char *s; /* name of the capability */
{
char *val;
val = tgetstr(s, &capbuf);
if (val)
{
*T = val;
}
}
/* This function fetches a required string from termcap */
static void musthave(T, s)
char **T; /* where to store the returned pointer */
char *s; /* name of the capability */
{
mayhave(T, s);
if (!*T)
{
msg(MSG_FATAL, "[s]termcap needs $1", s);
}
}
/* This function fetches a pair of strings from termcap. If one of them is
* missing, then the other one is ignored.
*/
static void pair(T, U, sT, sU)
char **T; /* where to store the first pointer */
char **U; /* where to store the second pointer */
char *sT; /* name of the first capability */
char *sU; /* name of the second capability */
{
mayhave(T, sT);
mayhave(U, sU);
if (!*T || !*U)
{
*T = *U = "";
}
}
/* This function gets a single termcap string in a special static buffer.
* Returns the string if successful, or NULL if unsuccessful.
*/
static char *manynames(names)
char *names; /* possible names (each pair of chars is one name) */
{
char name[3];
int i;
char *value;
/* for each possible name... */
for (i = 0; names[i]; i += 2)
{
/* see if the termcap string can be found */
name[0] = names[i];
name[1] = names[i + 1];
name[2] = '\0';
value = tgetstr(name, &capbuf);
if (value)
{
/* found! */
return value;
}
}
return NULL;
}
/* get termcap values */
static void starttcap()
{
static char cbmem[800];
char *str = NULL;
int i;
/* make sure TERM variable is set */
o_term = toCHAR(ttytermtype());
if (!o_term)
{
o_term = toCHAR("unknown");
}
optflags(o_term) |= OPT_SET|OPT_LOCK|OPT_NODFLT;
/* If the background option wasn't set via the $ELVISBG environment
* variable, then we should try to guess whether this terminal has
* a light or dark background. Our guess: The background is probably
* dark unless this is an xterm-like terminal emulator, or KDE's "kvt"
* which breaks a lot of xterm conventions, or has a name that ends
* with "-r" or "-rv" -- those two suffixes commonly denote reverse
* video versions of termcap/terminfo entries.
*/
if (getenv("ELVISBG") == NULL)
{
o_background = 'd'; /* "dark" */
if (getenv("WINDOWID") != NULL
|| !CHARcmp(o_term, toCHAR("kvt"))
|| !CHARcmp(o_term, toCHAR("xterm"))
|| ((str = strrchr(tochar8(o_term), '-')) != NULL
&& str[1] == 'r'))
{
o_background = 'l'; /* "light" */
}
}
/* allocate memory for capbuf */
capbuf = cbmem;
/* get the termcap entry */
if (!gotentry)
{
switch (tgetent(ttybuf, tochar8(o_term)))
{
case -1: msg(MSG_FATAL, "termcap database unreadable");
case 0: msg(MSG_FATAL, "[S]TERM=$1 unknown", o_term);
}
}
/* get strings */
musthave(&UP, "up");
BC = "\b";
mayhave(&BC, "bc");
mayhave(&VB, "vb");
musthave(&CM, "cm");
DO = "\n";
mayhave(&DO, "do");
mayhave(&DOmany, "DO");
mayhave(&TI, "ti");
mayhave(&TE, "te");
pair(&SC, &RC, "sc", "rc"); /* cursor save/restore */
pair(&KS, &KE, "ks", "ke"); /* keypad enable/disable */
mayhave(&AF, "AF");
if (tgetnum("sg") <= 0)
{
pair(&SO, &SE, "so", "se");
}
if (tgetnum("ug") <= 0)
{
pair(&US, &UE, "us", "ue");
/* bor: some terminals don't have :md:, but _do_ have :me:
Check, that we can switch attribute off before using it
*/
mayhave(&ME, "me");
if (ME && *ME)
{
mayhave(&MD, "md");
mayhave(&MH, "mh");
mayhave(&str, "mr");
if (str && (!SO || !strcmp(str, SO)))
{
SO = str;
SE = ME;
}
}
}
mayhave(&ICmany, "IC");
mayhave(&IC, "ic");
mayhave(&DCmany, "DC");
mayhave(&DC, "dc");
mayhave(&ALmany, "AL");
mayhave(&AL, "al");
mayhave(&DLmany, "DL");
mayhave(&DL, "dl");
musthave(&CE, "ce");
mayhave(&SRev, "sr");
/* cursor shapes */
CQ = tgetstr("cQ", &capbuf);
if (CQ)
{
CX = tgetstr("cX", &capbuf);
if (!CX) CX = CQ;
CV = tgetstr("cV", &capbuf);
if (!CV) CV = CQ;
CI = tgetstr("cI", &capbuf);
if (!CI) CI = CQ;
CR = tgetstr("cR", &capbuf);
if (!CR) CR = CQ;
}
else
{
CQ = CV = "";
pair(&CQ, &CV, "ve", "vs");
CX = CI = CQ;
CR = CV;
}
#ifdef FEATURE_MISC
/* graphic characters */
str = tgetstr("ac", &capbuf);
if (str)
{
/* apparently we're using the :as=:ae=:ac=: style */
pair(&GS, &GE, "as", "ae");
for (i = 0; str[i] && str[i + 1]; i += 2)
{
switch (str[i])
{
case 'q': GC_H = str[i + 1]; break;
case 'x': GC_V = str[i + 1]; break;
case 'm': GC_1 = str[i + 1]; break;
case 'v': GC_2 = str[i + 1]; break;
case 'j': GC_3 = str[i + 1]; break;
case 't': GC_4 = str[i + 1]; break;
case 'n': GC_5 = str[i + 1]; break;
case 'u': GC_6 = str[i + 1]; break;
case 'l': GC_7 = str[i + 1]; break;
case 'w': GC_8 = str[i + 1]; break;
case 'k': GC_9 = str[i + 1]; break;
}
}
}
else
{
/* maybe we have :GH=:GV=:... strings? */
if ((str = tgetstr("GH", &capbuf)) != NULL) GC_H = *str;
if ((str = tgetstr("GV", &capbuf)) != NULL) GC_V = *str;
if ((str = tgetstr("G3", &capbuf)) != NULL) GC_1 = *str;
if ((str = tgetstr("GU", &capbuf)) != NULL) GC_2 = *str;
if ((str = tgetstr("G4", &capbuf)) != NULL) GC_3 = *str;
if ((str = tgetstr("GR", &capbuf)) != NULL) GC_4 = *str;
if ((str = tgetstr("GC", &capbuf)) != NULL) GC_5 = *str;
if ((str = tgetstr("GL", &capbuf)) != NULL) GC_6 = *str;
if ((str = tgetstr("G2", &capbuf)) != NULL) GC_7 = *str;
if ((str = tgetstr("GD", &capbuf)) != NULL) GC_8 = *str;
if ((str = tgetstr("G1", &capbuf)) != NULL) GC_9 = *str;
pair(&GS, &GE, "GS", "GE");
/* if we have no :GS=:GE=: strings, then set MSB of chars */
if (!GS || !*GS)
{
if (GC_H) GC_H |= 0x80;
if (GC_V) GC_V |= 0x80;
if (GC_1) GC_1 |= 0x80;
if (GC_2) GC_2 |= 0x80;
if (GC_3) GC_3 |= 0x80;
if (GC_4) GC_4 |= 0x80;
if (GC_5) GC_5 |= 0x80;
if (GC_6) GC_6 |= 0x80;
if (GC_7) GC_7 |= 0x80;
if (GC_8) GC_8 |= 0x80;
if (GC_9) GC_9 |= 0x80;
}
}
#endif /* FEATURE_MISC */
/* key strings */
for (i = 0; i < QTY(keys); i++)
{
keys[i].rawin = manynames(keys[i].capnames);
}
/* other termcap stuff */
AM = (ELVBOOL)(tgetflag("am") && !tgetflag("xn"));
PT = (ELVBOOL)tgetflag("pt");
/* Compute the attribute resetting masks. Sometimes the same string
* will reset more than one attribute, so we need to check for identical
* strings and combine their effect on attributes.
*/
SEmask = ~(COLOR_BOXED|COLOR_LEFTBOX|COLOR_RIGHTBOX);
UEmask = ~COLOR_UNDERLINED;
MEmask = ~(COLOR_BOLD|COLOR_ITALIC);
if (SE && UE && !strcmp(SE, UE))
SEmask = UEmask &= SEmask;
if (SE && ME && !strcmp(SE, ME))
SEmask = MEmask &= SEmask;
if (UE && ME && !strcmp(UE, ME))
UEmask = MEmask &= UEmask;
/* change the terminal mode to cbreak/noecho */
ttyinit();
if (SC) tputs(SC, 1, ttych);
ttyresume(ElvTrue);
/* try to get true screen size, from the operating system */
ttygetsize();
}
static void endtcap()
{
/* change the terminal mode back the way it was */
ttysuspend();
}
/* end of termcap operations */
/*----------------------------------------------------------------------------*/
/* start of GUI functions */
static int afterprg; /* expose windows (after running prg) */
static int afterscrl; /* number of status lines (after running prg) */
static int physx, physy; /* physical cursor position */
static int nwindows; /* number of windows allocated */
/*----------------------------------------------------------------------------*/
/* This is an internal function which moves the physical cursor to the logical
* position of the cursor in a given window, if it isn't there already.
*/
static void movecurs(tw)
TWIN *tw; /* window whose cursor is to be moved */
{
int y = tw->pos + tw->cursy;
int i;
/* maybe we don't need to move at all? */
/* JohnW 13/08/96 > 1 was > 0 */
if ((afterprg > 1 && y <= o_ttyrows - afterscrl)
|| (y == physy && tw->cursx == physx))
{
/* already there */
return;
}
if (afterprg == 1) /* JohnW 13/08/96 - only use the bottom line */
{
/* We get the 'bottom' line by adding the difference between
* the window's bottom line and the screen's bottom line. This
* then allows scrolling of an input line and moving back onto
* the penultimate line */
tputs(tgoto(CM, tw->cursx, y + ((int)o_ttyrows - (tw->pos + tw->height))), 1, ttych);
physx = tw->cursx;
return;
}
else
/* Try some simple alternatives to the CM string */
if (y >= physy
&& (y - physy < gui->movecost || DOmany)
&& (tw->cursx == 0 || tw->cursx == physx))
{
/* output a bunch of newlines, and maybe a carriage return */
if (y - physy > 1 && DOmany)
tputs(tgoto(DOmany, y - physy, y - physy), 1, ttych);
else
for (i = y - physy; i > 0; i--)
tputs(DO, 1, ttych);
if (tw->cursx != physx)
ttych('\r');
}
else if (y == physy && tw->cursx < physx && physx - tw->cursx < gui->movecost)
{
/* output a bunch of backspaces */
for (i = physx - tw->cursx; i > 0; i--)
tputs(BC, 0, ttych);
}
/* many other special cases could be handled here */
else
{
/* revert to the normal font */
revert(tw);
/* move it the hard way */
tputs(tgoto(CM, tw->cursx, y), 1, ttych);
}
/* done! */
physx = tw->cursx;
physy = tw->cursy + tw->pos;
}
/* clear to end of line */
static ELVBOOL clrtoeol(gw)
GUIWIN *gw; /* window whose row is to be cleared */
{
TWIN *tw = (TWIN *)gw;
/* after running a program, disable the :ce: string for a while. */
/* JohnW 13/08/96 Not disabled for the bottom line of window */
if (afterprg && tw->cursy != (int)tw->height - 1)
return ElvTrue;
/* if we're on the bottom row of a window which doesn't end at the
* bottom of the screen, then fail. This will cause elvis to output
* a bunch of spaces instead. The draw() function will convert those
* spaces to underscore characters so the window has a border.
*/
if ( !afterprg && /* JohnW 13/08/96 Not after a prog... */
tw->cursy == tw->height - 1 && tw->pos + tw->height != o_ttyrows)
{
return ElvFalse;
}
/* revert to the normal font */
revert(tw);
/* move the physical cursor to where the window thinks it should be */
movecurs(tw);
/* output the clear-to-eol string */
tputs(CE, (int)(o_ttycolumns - tw->cursx), ttych);
return ElvTrue;
}
/* insert or delete columns */
static ELVBOOL shift(gw, qty, rows)
GUIWIN *gw; /* window to be shifted */
int qty; /* columns to insert (may be negative to delete) */
int rows; /* number of rows affected (always 1 for this GUI) */
{
/* revert to the normal font */
revert((TWIN *)gw);
/* move the physical cursor to where this window thinks it is */
movecurs((TWIN *)gw);
if (qty > 0)
{
/* can we do many at once? */
if (qty > 1 && ICmany)
{
tputs(tgoto(ICmany, qty, qty), 1, ttych);
}
else if (IC)
{
for (; qty > 0; qty--)
{
tputs(IC, 1, ttych);
}
}
else
{
/* don't know how to insert */
return ElvFalse;
}
}
else
{
/* take the absolute value of qty */
qty = -qty;
/* can we do many deletions at once? */
if (qty > 1 && DCmany)
{
tputs(tgoto(DCmany, qty, qty), 1, ttych);
}
else if (DC)
{
for (; qty > 0; qty--)
{
tputs(DC, 1, ttych);
}
}
else
{
/* don't know how to delete */
return ElvFalse;
}
}
return ElvTrue;
}
/* insert or delete rows. qty is positive to insert, negative to delete */
static ELVBOOL scroll(gw, qty, notlast)
GUIWIN *gw; /* window to be scrolled */
int qty; /* rows to insert (may be nagative to delete) */