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st/st.c
Roberto E. Vargas Caballero ee7fd748ac Add tabs field into Term struct 
Tabs stop are simulated in st using a fixed size of 8, always, without be
worried about sequences changing the tab stops. A user can put a tab stop in
each horizontal position of the screen, so we need at least one flag for
each column of the screen. In the same way as dirty flags is used for the
rows, it is used a bool dinamic array.

Signed-off-by: Roberto E. Vargas Caballero <k0ga@shike2.com>
---
 st.c |   22 +++++++++++++++++++---
 1 file changed, 19 insertions(+), 3 deletions(-)
2012-08-29 19:59:37 +02:00

2175 lines
48 KiB
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/* See LICENSE for licence details. */
#define _XOPEN_SOURCE 600
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <locale.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <sys/select.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
#include <X11/Xatom.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/cursorfont.h>
#include <X11/keysym.h>
#include <X11/extensions/Xdbe.h>
#if defined(__linux)
#include <pty.h>
#elif defined(__OpenBSD__) || defined(__NetBSD__) || defined(__APPLE__)
#include <util.h>
#elif defined(__FreeBSD__) || defined(__DragonFly__)
#include <libutil.h>
#endif
#define USAGE \
"st " VERSION " (c) 2010-2012 st engineers\n" \
"usage: st [-t title] [-c class] [-w windowid] [-v] [-e command...]\n"
/* XEMBED messages */
#define XEMBED_FOCUS_IN 4
#define XEMBED_FOCUS_OUT 5
/* Arbitrary sizes */
#define ESC_TITLE_SIZ 256
#define ESC_BUF_SIZ 256
#define ESC_ARG_SIZ 16
#define DRAW_BUF_SIZ 1024
#define UTF_SIZ 4
#define XK_NO_MOD UINT_MAX
#define XK_ANY_MOD 0
#define SELECT_TIMEOUT (20*1000) /* 20 ms */
#define DRAW_TIMEOUT (20*1000) /* 20 ms */
#define SERRNO strerror(errno)
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#define MAX(a, b) ((a) < (b) ? (b) : (a))
#define LEN(a) (sizeof(a) / sizeof(a[0]))
#define DEFAULT(a, b) (a) = (a) ? (a) : (b)
#define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b))
#define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x)
#define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg)
#define IS_SET(flag) (term.mode & (flag))
#define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
#define X2COL(x) (((x) - BORDER)/xw.cw)
#define Y2ROW(y) (((y) - BORDER)/xw.ch)
enum glyph_attribute {
ATTR_NULL = 0,
ATTR_REVERSE = 1,
ATTR_UNDERLINE = 2,
ATTR_BOLD = 4,
ATTR_GFX = 8,
};
enum cursor_movement {
CURSOR_UP,
CURSOR_DOWN,
CURSOR_LEFT,
CURSOR_RIGHT,
CURSOR_SAVE,
CURSOR_LOAD
};
enum cursor_state {
CURSOR_DEFAULT = 0,
CURSOR_HIDE = 1,
CURSOR_WRAPNEXT = 2
};
enum glyph_state {
GLYPH_SET = 1,
GLYPH_DIRTY = 2
};
enum term_mode {
MODE_WRAP = 1,
MODE_INSERT = 2,
MODE_APPKEYPAD = 4,
MODE_ALTSCREEN = 8,
MODE_CRLF = 16,
MODE_MOUSEBTN = 32,
MODE_MOUSEMOTION = 64,
MODE_MOUSE = 32|64,
MODE_REVERSE = 128
};
enum escape_state {
ESC_START = 1,
ESC_CSI = 2,
ESC_OSC = 4,
ESC_TITLE = 8,
ESC_ALTCHARSET = 16
};
enum window_state {
WIN_VISIBLE = 1,
WIN_REDRAW = 2,
WIN_FOCUSED = 4
};
/* bit macro */
#undef B0
enum { B0=1, B1=2, B2=4, B3=8, B4=16, B5=32, B6=64, B7=128 };
typedef unsigned char uchar;
typedef unsigned int uint;
typedef unsigned long ulong;
typedef unsigned short ushort;
typedef struct {
char c[UTF_SIZ]; /* character code */
uchar mode; /* attribute flags */
ushort fg; /* foreground */
ushort bg; /* background */
uchar state; /* state flags */
} Glyph;
typedef Glyph* Line;
typedef struct {
Glyph attr; /* current char attributes */
int x;
int y;
char state;
} TCursor;
/* CSI Escape sequence structs */
/* ESC '[' [[ [<priv>] <arg> [;]] <mode>] */
typedef struct {
char buf[ESC_BUF_SIZ]; /* raw string */
int len; /* raw string length */
char priv;
int arg[ESC_ARG_SIZ];
int narg; /* nb of args */
char mode;
} CSIEscape;
/* Internal representation of the screen */
typedef struct {
int row; /* nb row */
int col; /* nb col */
Line* line; /* screen */
Line* alt; /* alternate screen */
bool* dirty; /* dirtyness of lines */
TCursor c; /* cursor */
int top; /* top scroll limit */
int bot; /* bottom scroll limit */
int mode; /* terminal mode flags */
int esc; /* escape state flags */
char title[ESC_TITLE_SIZ];
int titlelen;
bool *tabs;
} Term;
/* Purely graphic info */
typedef struct {
Display* dpy;
Colormap cmap;
Window win;
XdbeBackBuffer buf;
Atom xembed;
XIM xim;
XIC xic;
int scr;
int w; /* window width */
int h; /* window height */
int ch; /* char height */
int cw; /* char width */
char state; /* focus, redraw, visible */
struct timeval lastdraw;
} XWindow;
typedef struct {
KeySym k;
uint mask;
char s[ESC_BUF_SIZ];
} Key;
/* TODO: use better name for vars... */
typedef struct {
int mode;
int bx, by;
int ex, ey;
struct {int x, y;} b, e;
char *clip;
Atom xtarget;
struct timeval tclick1;
struct timeval tclick2;
} Selection;
#include "config.h"
/* Drawing Context */
typedef struct {
ulong col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
GC gc;
struct {
int ascent;
int descent;
short lbearing;
short rbearing;
XFontSet set;
} font, bfont;
} DC;
static void die(const char*, ...);
static void draw(void);
static void drawregion(int, int, int, int);
static void execsh(void);
static void sigchld(int);
static void run(void);
static bool last_draw_too_old(void);
static void csidump(void);
static void csihandle(void);
static void csiparse(void);
static void csireset(void);
static void tclearregion(int, int, int, int);
static void tcursor(int);
static void tdeletechar(int);
static void tdeleteline(int);
static void tinsertblank(int);
static void tinsertblankline(int);
static void tmoveto(int, int);
static void tnew(int, int);
static void tnewline(int);
static void tputtab(void);
static void tputc(char*);
static void treset(void);
static int tresize(int, int);
static void tscrollup(int, int);
static void tscrolldown(int, int);
static void tsetattr(int*, int);
static void tsetchar(char*);
static void tsetscroll(int, int);
static void tswapscreen(void);
static void tsetdirt(int, int);
static void tfulldirt(void);
static void ttynew(void);
static void ttyread(void);
static void ttyresize(int, int);
static void ttywrite(const char *, size_t);
static void xdraws(char *, Glyph, int, int, int, int);
static void xhints(void);
static void xclear(int, int, int, int);
static void xcopy();
static void xdrawcursor(void);
static void xinit(void);
static void xloadcols(void);
static void xseturgency(int);
static void xsetsel(char*);
static void xresize(int, int);
static void expose(XEvent *);
static void visibility(XEvent *);
static void unmap(XEvent *);
static char* kmap(KeySym, uint);
static void kpress(XEvent *);
static void cmessage(XEvent *);
static void resize(XEvent *);
static void focus(XEvent *);
static void brelease(XEvent *);
static void bpress(XEvent *);
static void bmotion(XEvent *);
static void selnotify(XEvent *);
static void selrequest(XEvent *);
static void selinit(void);
static inline bool selected(int, int);
static void selcopy(void);
static void selpaste();
static void selscroll(int, int);
static int utf8decode(char *, long *);
static int utf8encode(long *, char *);
static int utf8size(char *);
static int isfullutf8(char *, int);
static void (*handler[LASTEvent])(XEvent *) = {
[KeyPress] = kpress,
[ClientMessage] = cmessage,
[ConfigureNotify] = resize,
[VisibilityNotify] = visibility,
[UnmapNotify] = unmap,
[Expose] = expose,
[FocusIn] = focus,
[FocusOut] = focus,
[MotionNotify] = bmotion,
[ButtonPress] = bpress,
[ButtonRelease] = brelease,
[SelectionNotify] = selnotify,
[SelectionRequest] = selrequest,
};
/* Globals */
static DC dc;
static XWindow xw;
static Term term;
static CSIEscape escseq;
static int cmdfd;
static pid_t pid;
static Selection sel;
static char **opt_cmd = NULL;
static char *opt_title = NULL;
static char *opt_embed = NULL;
static char *opt_class = NULL;
int
utf8decode(char *s, long *u) {
uchar c;
int i, n, rtn;
rtn = 1;
c = *s;
if(~c & B7) { /* 0xxxxxxx */
*u = c;
return rtn;
} else if((c & (B7|B6|B5)) == (B7|B6)) { /* 110xxxxx */
*u = c&(B4|B3|B2|B1|B0);
n = 1;
} else if((c & (B7|B6|B5|B4)) == (B7|B6|B5)) { /* 1110xxxx */
*u = c&(B3|B2|B1|B0);
n = 2;
} else if((c & (B7|B6|B5|B4|B3)) == (B7|B6|B5|B4)) { /* 11110xxx */
*u = c & (B2|B1|B0);
n = 3;
} else
goto invalid;
for(i = n, ++s; i > 0; --i, ++rtn, ++s) {
c = *s;
if((c & (B7|B6)) != B7) /* 10xxxxxx */
goto invalid;
*u <<= 6;
*u |= c & (B5|B4|B3|B2|B1|B0);
}
if((n == 1 && *u < 0x80) ||
(n == 2 && *u < 0x800) ||
(n == 3 && *u < 0x10000) ||
(*u >= 0xD800 && *u <= 0xDFFF))
goto invalid;
return rtn;
invalid:
*u = 0xFFFD;
return rtn;
}
int
utf8encode(long *u, char *s) {
uchar *sp;
ulong uc;
int i, n;
sp = (uchar*) s;
uc = *u;
if(uc < 0x80) {
*sp = uc; /* 0xxxxxxx */
return 1;
} else if(*u < 0x800) {
*sp = (uc >> 6) | (B7|B6); /* 110xxxxx */
n = 1;
} else if(uc < 0x10000) {
*sp = (uc >> 12) | (B7|B6|B5); /* 1110xxxx */
n = 2;
} else if(uc <= 0x10FFFF) {
*sp = (uc >> 18) | (B7|B6|B5|B4); /* 11110xxx */
n = 3;
} else {
goto invalid;
}
for(i=n,++sp; i>0; --i,++sp)
*sp = ((uc >> 6*(i-1)) & (B5|B4|B3|B2|B1|B0)) | B7; /* 10xxxxxx */
return n+1;
invalid:
/* U+FFFD */
*s++ = '\xEF';
*s++ = '\xBF';
*s = '\xBD';
return 3;
}
/* use this if your buffer is less than UTF_SIZ, it returns 1 if you can decode
UTF-8 otherwise return 0 */
int
isfullutf8(char *s, int b) {
uchar *c1, *c2, *c3;
c1 = (uchar *) s;
c2 = (uchar *) ++s;
c3 = (uchar *) ++s;
if(b < 1)
return 0;
else if((*c1&(B7|B6|B5)) == (B7|B6) && b == 1)
return 0;
else if((*c1&(B7|B6|B5|B4)) == (B7|B6|B5) &&
((b == 1) ||
((b == 2) && (*c2&(B7|B6)) == B7)))
return 0;
else if((*c1&(B7|B6|B5|B4|B3)) == (B7|B6|B5|B4) &&
((b == 1) ||
((b == 2) && (*c2&(B7|B6)) == B7) ||
((b == 3) && (*c2&(B7|B6)) == B7 && (*c3&(B7|B6)) == B7)))
return 0;
else
return 1;
}
int
utf8size(char *s) {
uchar c = *s;
if(~c&B7)
return 1;
else if((c&(B7|B6|B5)) == (B7|B6))
return 2;
else if((c&(B7|B6|B5|B4)) == (B7|B6|B5))
return 3;
else
return 4;
}
void
selinit(void) {
memset(&sel.tclick1, 0, sizeof(sel.tclick1));
memset(&sel.tclick2, 0, sizeof(sel.tclick2));
sel.mode = 0;
sel.bx = -1;
sel.clip = NULL;
sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
if(sel.xtarget == None)
sel.xtarget = XA_STRING;
}
static inline bool
selected(int x, int y) {
if(sel.ey == y && sel.by == y) {
int bx = MIN(sel.bx, sel.ex);
int ex = MAX(sel.bx, sel.ex);
return BETWEEN(x, bx, ex);
}
return ((sel.b.y < y&&y < sel.e.y) || (y==sel.e.y && x<=sel.e.x))
|| (y==sel.b.y && x>=sel.b.x && (x<=sel.e.x || sel.b.y!=sel.e.y));
}
void
getbuttoninfo(XEvent *e, int *b, int *x, int *y) {
if(b)
*b = e->xbutton.button;
*x = X2COL(e->xbutton.x);
*y = Y2ROW(e->xbutton.y);
sel.b.x = sel.by < sel.ey ? sel.bx : sel.ex;
sel.b.y = MIN(sel.by, sel.ey);
sel.e.x = sel.by < sel.ey ? sel.ex : sel.bx;
sel.e.y = MAX(sel.by, sel.ey);
}
void
mousereport(XEvent *e) {
int x = X2COL(e->xbutton.x);
int y = Y2ROW(e->xbutton.y);
int button = e->xbutton.button;
int state = e->xbutton.state;
char buf[] = { '\033', '[', 'M', 0, 32+x+1, 32+y+1 };
static int ob, ox, oy;
/* from urxvt */
if(e->xbutton.type == MotionNotify) {
if(!IS_SET(MODE_MOUSEMOTION) || (x == ox && y == oy))
return;
button = ob + 32;
ox = x, oy = y;
} else if(e->xbutton.type == ButtonRelease || button == AnyButton) {
button = 3;
} else {
button -= Button1;
if(button >= 3)
button += 64 - 3;
if(e->xbutton.type == ButtonPress) {
ob = button;
ox = x, oy = y;
}
}
buf[3] = 32 + button + (state & ShiftMask ? 4 : 0)
+ (state & Mod4Mask ? 8 : 0)
+ (state & ControlMask ? 16 : 0);
ttywrite(buf, sizeof(buf));
}
void
bpress(XEvent *e) {
if(IS_SET(MODE_MOUSE))
mousereport(e);
else if(e->xbutton.button == Button1) {
if(sel.bx != -1)
tsetdirt(sel.b.y, sel.e.y);
sel.mode = 1;
sel.ex = sel.bx = X2COL(e->xbutton.x);
sel.ey = sel.by = Y2ROW(e->xbutton.y);
}
}
void
selcopy(void) {
char *str, *ptr;
int x, y, bufsize, is_selected = 0;
if(sel.bx == -1)
str = NULL;
else {
bufsize = (term.col+1) * (sel.e.y-sel.b.y+1) * UTF_SIZ;
ptr = str = malloc(bufsize);
/* append every set & selected glyph to the selection */
for(y = 0; y < term.row; y++) {
for(x = 0; x < term.col; x++) {
is_selected = selected(x, y);
if((term.line[y][x].state & GLYPH_SET) && is_selected) {
int size = utf8size(term.line[y][x].c);
memcpy(ptr, term.line[y][x].c, size);
ptr += size;
}
}
/* \n at the end of every selected line except for the last one */
if(is_selected && y < sel.e.y)
*ptr++ = '\n';
}
*ptr = 0;
}
xsetsel(str);
}
void
selnotify(XEvent *e) {
ulong nitems, ofs, rem;
int format;
uchar *data;
Atom type;
ofs = 0;
do {
if(XGetWindowProperty(xw.dpy, xw.win, XA_PRIMARY, ofs, BUFSIZ/4,
False, AnyPropertyType, &type, &format,
&nitems, &rem, &data)) {
fprintf(stderr, "Clipboard allocation failed\n");
return;
}
ttywrite((const char *) data, nitems * format / 8);
XFree(data);
/* number of 32-bit chunks returned */
ofs += nitems * format / 32;
} while(rem > 0);
}
void
selpaste() {
XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY, xw.win, CurrentTime);
}
void
selrequest(XEvent *e) {
XSelectionRequestEvent *xsre;
XSelectionEvent xev;
Atom xa_targets;
xsre = (XSelectionRequestEvent *) e;
xev.type = SelectionNotify;
xev.requestor = xsre->requestor;
xev.selection = xsre->selection;
xev.target = xsre->target;
xev.time = xsre->time;
/* reject */
xev.property = None;
xa_targets = XInternAtom(xw.dpy, "TARGETS", 0);
if(xsre->target == xa_targets) {
/* respond with the supported type */
Atom string = sel.xtarget;
XChangeProperty(xsre->display, xsre->requestor, xsre->property,
XA_ATOM, 32, PropModeReplace,
(uchar *) &string, 1);
xev.property = xsre->property;
} else if(xsre->target == sel.xtarget && sel.clip != NULL) {
XChangeProperty(xsre->display, xsre->requestor, xsre->property,
xsre->target, 8, PropModeReplace,
(uchar *) sel.clip, strlen(sel.clip));
xev.property = xsre->property;
}
/* all done, send a notification to the listener */
if(!XSendEvent(xsre->display, xsre->requestor, True, 0, (XEvent *) &xev))
fprintf(stderr, "Error sending SelectionNotify event\n");
}
void
xsetsel(char *str) {
/* register the selection for both the clipboard and the primary */
Atom clipboard;
free(sel.clip);
sel.clip = str;
XSetSelectionOwner(xw.dpy, XA_PRIMARY, xw.win, CurrentTime);
clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
XSetSelectionOwner(xw.dpy, clipboard, xw.win, CurrentTime);
XFlush(xw.dpy);
}
void
brelease(XEvent *e) {
if(IS_SET(MODE_MOUSE)) {
mousereport(e);
return;
}
if(e->xbutton.button == Button2)
selpaste();
else if(e->xbutton.button == Button1) {
sel.mode = 0;
getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
term.dirty[sel.ey] = 1;
if(sel.bx == sel.ex && sel.by == sel.ey) {
struct timeval now;
sel.bx = -1;
gettimeofday(&now, NULL);
if(TIMEDIFF(now, sel.tclick2) <= TRIPLECLICK_TIMEOUT) {
/* triple click on the line */
sel.b.x = sel.bx = 0;
sel.e.x = sel.ex = term.col;
sel.b.y = sel.e.y = sel.ey;
selcopy();
} else if(TIMEDIFF(now, sel.tclick1) <= DOUBLECLICK_TIMEOUT) {
/* double click to select word */
sel.bx = sel.ex;
while(sel.bx > 0 && term.line[sel.ey][sel.bx-1].state & GLYPH_SET &&
term.line[sel.ey][sel.bx-1].c[0] != ' ') sel.bx--;
sel.b.x = sel.bx;
while(sel.ex < term.col-1 && term.line[sel.ey][sel.ex+1].state & GLYPH_SET &&
term.line[sel.ey][sel.ex+1].c[0] != ' ') sel.ex++;
sel.e.x = sel.ex;
sel.b.y = sel.e.y = sel.ey;
selcopy();
}
} else
selcopy();
}
memcpy(&sel.tclick2, &sel.tclick1, sizeof(struct timeval));
gettimeofday(&sel.tclick1, NULL);
draw();
}
void
bmotion(XEvent *e) {
if(IS_SET(MODE_MOUSE)) {
mousereport(e);
return;
}
if(sel.mode) {
int oldey = sel.ey, oldex = sel.ex;
getbuttoninfo(e, NULL, &sel.ex, &sel.ey);
if(oldey != sel.ey || oldex != sel.ex) {
int starty = MIN(oldey, sel.ey);
int endy = MAX(oldey, sel.ey);
tsetdirt(starty, endy);
draw();
}
}
}
void
die(const char *errstr, ...) {
va_list ap;
va_start(ap, errstr);
vfprintf(stderr, errstr, ap);
va_end(ap);
exit(EXIT_FAILURE);
}
void
execsh(void) {
char **args;
char *envshell = getenv("SHELL");
DEFAULT(envshell, SHELL);
putenv("TERM="TNAME);
args = opt_cmd ? opt_cmd : (char*[]){envshell, "-i", NULL};
execvp(args[0], args);
exit(EXIT_FAILURE);
}
void
sigchld(int a) {
int stat = 0;
if(waitpid(pid, &stat, 0) < 0)
die("Waiting for pid %hd failed: %s\n", pid, SERRNO);
if(WIFEXITED(stat))
exit(WEXITSTATUS(stat));
else
exit(EXIT_FAILURE);
}
void
ttynew(void) {
int m, s;
/* seems to work fine on linux, openbsd and freebsd */
struct winsize w = {term.row, term.col, 0, 0};
if(openpty(&m, &s, NULL, NULL, &w) < 0)
die("openpty failed: %s\n", SERRNO);
switch(pid = fork()) {
case -1:
die("fork failed\n");
break;
case 0:
setsid(); /* create a new process group */
dup2(s, STDIN_FILENO);
dup2(s, STDOUT_FILENO);
dup2(s, STDERR_FILENO);
if(ioctl(s, TIOCSCTTY, NULL) < 0)
die("ioctl TIOCSCTTY failed: %s\n", SERRNO);
close(s);
close(m);
execsh();
break;
default:
close(s);
cmdfd = m;
signal(SIGCHLD, sigchld);
}
}
void
dump(char c) {
static int col;
fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.');
if(++col % 10 == 0)
fprintf(stderr, "\n");
}
void
ttyread(void) {
static char buf[BUFSIZ];
static int buflen = 0;
char *ptr;
char s[UTF_SIZ];
int charsize; /* size of utf8 char in bytes */
long utf8c;
int ret;
/* append read bytes to unprocessed bytes */
if((ret = read(cmdfd, buf+buflen, LEN(buf)-buflen)) < 0)
die("Couldn't read from shell: %s\n", SERRNO);
/* process every complete utf8 char */
buflen += ret;
ptr = buf;
while(buflen >= UTF_SIZ || isfullutf8(ptr,buflen)) {
charsize = utf8decode(ptr, &utf8c);
utf8encode(&utf8c, s);
tputc(s);
ptr += charsize;
buflen -= charsize;
}
/* keep any uncomplete utf8 char for the next call */
memmove(buf, ptr, buflen);
}
void
ttywrite(const char *s, size_t n) {
if(write(cmdfd, s, n) == -1)
die("write error on tty: %s\n", SERRNO);
}
void
ttyresize(int x, int y) {
struct winsize w;
w.ws_row = term.row;
w.ws_col = term.col;
w.ws_xpixel = w.ws_ypixel = 0;
if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
}
void
tsetdirt(int top, int bot)
{
int i;
LIMIT(top, 0, term.row-1);
LIMIT(bot, 0, term.row-1);
for(i = top; i <= bot; i++)
term.dirty[i] = 1;
}
void
tfulldirt(void)
{
tsetdirt(0, term.row-1);
}
void
tcursor(int mode) {
static TCursor c;
if(mode == CURSOR_SAVE)
c = term.c;
else if(mode == CURSOR_LOAD)
term.c = c, tmoveto(c.x, c.y);
}
void
treset(void) {
unsigned i;
term.c = (TCursor){{
.mode = ATTR_NULL,
.fg = DefaultFG,
.bg = DefaultBG
}, .x = 0, .y = 0, .state = CURSOR_DEFAULT};
memset(term.tabs, 0, term.col * sizeof(*term.tabs));
for (i = TAB; i < term.col; i += TAB)
term.tabs[i] = 1;
term.top = 0, term.bot = term.row - 1;
term.mode = MODE_WRAP;
tclearregion(0, 0, term.col-1, term.row-1);
}
void
tnew(int col, int row) {
/* set screen size */
term.row = row, term.col = col;
term.line = malloc(term.row * sizeof(Line));
term.alt = malloc(term.row * sizeof(Line));
term.dirty = malloc(term.row * sizeof(*term.dirty));
term.tabs = malloc(term.col * sizeof(*term.tabs));
for(row = 0; row < term.row; row++) {
term.line[row] = malloc(term.col * sizeof(Glyph));
term.alt [row] = malloc(term.col * sizeof(Glyph));
term.dirty[row] = 0;
}
memset(term.tabs, 0, term.col * sizeof(*term.tabs));
/* setup screen */
treset();
}
void
tswapscreen(void) {
Line* tmp = term.line;
term.line = term.alt;
term.alt = tmp;
term.mode ^= MODE_ALTSCREEN;
tfulldirt();
}
void
tscrolldown(int orig, int n) {
int i;
Line temp;
LIMIT(n, 0, term.bot-orig+1);
tclearregion(0, term.bot-n+1, term.col-1, term.bot);
for(i = term.bot; i >= orig+n; i--) {
temp = term.line[i];
term.line[i] = term.line[i-n];
term.line[i-n] = temp;
term.dirty[i] = 1;
term.dirty[i-n] = 1;
}
selscroll(orig, n);
}
void
tscrollup(int orig, int n) {
int i;
Line temp;
LIMIT(n, 0, term.bot-orig+1);
tclearregion(0, orig, term.col-1, orig+n-1);
for(i = orig; i <= term.bot-n; i++) {
temp = term.line[i];
term.line[i] = term.line[i+n];
term.line[i+n] = temp;
term.dirty[i] = 1;
term.dirty[i+n] = 1;
}
selscroll(orig, -n);
}
void
selscroll(int orig, int n) {
if(sel.bx == -1)
return;
if(BETWEEN(sel.by, orig, term.bot) || BETWEEN(sel.ey, orig, term.bot)) {
if((sel.by += n) > term.bot || (sel.ey += n) < term.top) {
sel.bx = -1;
return;
}
if(sel.by < term.top) {
sel.by = term.top;
sel.bx = 0;
}
if(sel.ey > term.bot) {
sel.ey = term.bot;
sel.ex = term.col;
}
sel.b.y = sel.by, sel.b.x = sel.bx;
sel.e.y = sel.ey, sel.e.x = sel.ex;
}
}
void
tnewline(int first_col) {
int y = term.c.y;
if(y == term.bot)
tscrollup(term.top, 1);
else
y++;
tmoveto(first_col ? 0 : term.c.x, y);
}
void
csiparse(void) {
/* int noarg = 1; */
char *p = escseq.buf;
escseq.narg = 0;
if(*p == '?')
escseq.priv = 1, p++;
while(p < escseq.buf+escseq.len) {
while(isdigit(*p)) {
escseq.arg[escseq.narg] *= 10;
escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */;
}
if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ)
escseq.narg++, p++;
else {
escseq.mode = *p;
escseq.narg++;
return;
}
}
}
void
tmoveto(int x, int y) {
LIMIT(x, 0, term.col-1);
LIMIT(y, 0, term.row-1);
term.c.state &= ~CURSOR_WRAPNEXT;
term.c.x = x;
term.c.y = y;
}
void
tsetchar(char *c) {
term.dirty[term.c.y] = 1;
term.line[term.c.y][term.c.x] = term.c.attr;
memcpy(term.line[term.c.y][term.c.x].c, c, UTF_SIZ);
term.line[term.c.y][term.c.x].state |= GLYPH_SET;
}
void
tclearregion(int x1, int y1, int x2, int y2) {
int x, y, temp;
if(x1 > x2)
temp = x1, x1 = x2, x2 = temp;
if(y1 > y2)
temp = y1, y1 = y2, y2 = temp;
LIMIT(x1, 0, term.col-1);
LIMIT(x2, 0, term.col-1);
LIMIT(y1, 0, term.row-1);
LIMIT(y2, 0, term.row-1);
for(y = y1; y <= y2; y++) {
term.dirty[y] = 1;
for(x = x1; x <= x2; x++)
term.line[y][x].state = 0;
}
}
void
tdeletechar(int n) {
int src = term.c.x + n;
int dst = term.c.x;
int size = term.col - src;
term.dirty[term.c.y] = 1;
if(src >= term.col) {
tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
return;
}
memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
}
void
tinsertblank(int n) {
int src = term.c.x;
int dst = src + n;
int size = term.col - dst;
term.dirty[term.c.y] = 1;
if(dst >= term.col) {
tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
return;
}
memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph));
tclearregion(src, term.c.y, dst - 1, term.c.y);
}
void
tinsertblankline(int n) {
if(term.c.y < term.top || term.c.y > term.bot)
return;
tscrolldown(term.c.y, n);
}
void
tdeleteline(int n) {
if(term.c.y < term.top || term.c.y > term.bot)
return;
tscrollup(term.c.y, n);
}
void
tsetattr(int *attr, int l) {
int i;
for(i = 0; i < l; i++) {
switch(attr[i]) {
case 0:
term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD);
term.c.attr.fg = DefaultFG;
term.c.attr.bg = DefaultBG;
break;
case 1:
term.c.attr.mode |= ATTR_BOLD;
break;
case 4:
term.c.attr.mode |= ATTR_UNDERLINE;
break;
case 7:
term.c.attr.mode |= ATTR_REVERSE;
break;
case 22:
term.c.attr.mode &= ~ATTR_BOLD;
break;
case 24:
term.c.attr.mode &= ~ATTR_UNDERLINE;
break;
case 27:
term.c.attr.mode &= ~ATTR_REVERSE;
break;
case 38:
if(i + 2 < l && attr[i + 1] == 5) {
i += 2;
if(BETWEEN(attr[i], 0, 255))
term.c.attr.fg = attr[i];
else
fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]);
}
else
fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
break;
case 39:
term.c.attr.fg = DefaultFG;
break;
case 48:
if(i + 2 < l && attr[i + 1] == 5) {
i += 2;
if(BETWEEN(attr[i], 0, 255))
term.c.attr.bg = attr[i];
else
fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]);
}
else
fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]);
break;
case 49:
term.c.attr.bg = DefaultBG;
break;
default:
if(BETWEEN(attr[i], 30, 37))
term.c.attr.fg = attr[i] - 30;
else if(BETWEEN(attr[i], 40, 47))
term.c.attr.bg = attr[i] - 40;
else if(BETWEEN(attr[i], 90, 97))
term.c.attr.fg = attr[i] - 90 + 8;
else if(BETWEEN(attr[i], 100, 107))
term.c.attr.fg = attr[i] - 100 + 8;
else
fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]), csidump();
break;
}
}
}
void
tsetscroll(int t, int b) {
int temp;
LIMIT(t, 0, term.row-1);
LIMIT(b, 0, term.row-1);
if(t > b) {
temp = t;
t = b;
b = temp;
}
term.top = t;
term.bot = b;
}
void
csihandle(void) {
switch(escseq.mode) {
default:
unknown:
fprintf(stderr, "erresc: unknown csi ");
csidump();
/* die(""); */
break;
case '@': /* ICH -- Insert <n> blank char */
DEFAULT(escseq.arg[0], 1);
tinsertblank(escseq.arg[0]);
break;
case 'A': /* CUU -- Cursor <n> Up */
case 'e':
DEFAULT(escseq.arg[0], 1);
tmoveto(term.c.x, term.c.y-escseq.arg[0]);
break;
case 'B': /* CUD -- Cursor <n> Down */
DEFAULT(escseq.arg[0], 1);
tmoveto(term.c.x, term.c.y+escseq.arg[0]);
break;
case 'C': /* CUF -- Cursor <n> Forward */
case 'a':
DEFAULT(escseq.arg[0], 1);
tmoveto(term.c.x+escseq.arg[0], term.c.y);
break;
case 'D': /* CUB -- Cursor <n> Backward */
DEFAULT(escseq.arg[0], 1);
tmoveto(term.c.x-escseq.arg[0], term.c.y);
break;
case 'E': /* CNL -- Cursor <n> Down and first col */
DEFAULT(escseq.arg[0], 1);
tmoveto(0, term.c.y+escseq.arg[0]);
break;
case 'F': /* CPL -- Cursor <n> Up and first col */
DEFAULT(escseq.arg[0], 1);
tmoveto(0, term.c.y-escseq.arg[0]);
break;
case 'G': /* CHA -- Move to <col> */
case '`': /* XXX: HPA -- same? */
DEFAULT(escseq.arg[0], 1);
tmoveto(escseq.arg[0]-1, term.c.y);
break;
case 'H': /* CUP -- Move to <row> <col> */
case 'f': /* XXX: HVP -- same? */
DEFAULT(escseq.arg[0], 1);
DEFAULT(escseq.arg[1], 1);
tmoveto(escseq.arg[1]-1, escseq.arg[0]-1);
break;
/* XXX: (CSI n I) CHT -- Cursor Forward Tabulation <n> tab stops */
case 'J': /* ED -- Clear screen */
sel.bx = -1;
switch(escseq.arg[0]) {
case 0: /* below */
tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
if(term.c.y < term.row-1)
tclearregion(0, term.c.y+1, term.col-1, term.row-1);
break;
case 1: /* above */
if(term.c.y > 1)
tclearregion(0, 0, term.col-1, term.c.y-1);
tclearregion(0, term.c.y, term.c.x, term.c.y);
break;
case 2: /* all */
tclearregion(0, 0, term.col-1, term.row-1);
break;
default:
goto unknown;
}
break;
case 'K': /* EL -- Clear line */
switch(escseq.arg[0]) {
case 0: /* right */
tclearregion(term.c.x, term.c.y, term.col-1, term.c.y);
break;
case 1: /* left */
tclearregion(0, term.c.y, term.c.x, term.c.y);
break;
case 2: /* all */
tclearregion(0, term.c.y, term.col-1, term.c.y);
break;
}
break;
case 'S': /* SU -- Scroll <n> line up */
DEFAULT(escseq.arg[0], 1);
tscrollup(term.top, escseq.arg[0]);
break;
case 'T': /* SD -- Scroll <n> line down */
DEFAULT(escseq.arg[0], 1);
tscrolldown(term.top, escseq.arg[0]);
break;
case 'L': /* IL -- Insert <n> blank lines */
DEFAULT(escseq.arg[0], 1);
tinsertblankline(escseq.arg[0]);
break;
case 'l': /* RM -- Reset Mode */
if(escseq.priv) {
switch(escseq.arg[0]) {
case 1:
term.mode &= ~MODE_APPKEYPAD;
break;
case 5: /* DECSCNM -- Remove reverse video */
if(IS_SET(MODE_REVERSE)) {
term.mode &= ~MODE_REVERSE;
draw();
}
break;
case 7:
term.mode &= ~MODE_WRAP;
break;
case 12: /* att610 -- Stop blinking cursor (IGNORED) */
break;
case 20:
term.mode &= ~MODE_CRLF;
break;
case 25:
term.c.state |= CURSOR_HIDE;
break;
case 1000: /* disable X11 xterm mouse reporting */
term.mode &= ~MODE_MOUSEBTN;
break;
case 1002:
term.mode &= ~MODE_MOUSEMOTION;
break;
case 1049: /* = 1047 and 1048 */
case 47:
case 1047:
if(IS_SET(MODE_ALTSCREEN)) {
tclearregion(0, 0, term.col-1, term.row-1);
tswapscreen();
}
if(escseq.arg[0] != 1049)
break;
case 1048:
tcursor(CURSOR_LOAD);
break;
default:
goto unknown;
}
} else {
switch(escseq.arg[0]) {
case 4:
term.mode &= ~MODE_INSERT;
break;
default:
goto unknown;
}
}
break;
case 'M': /* DL -- Delete <n> lines */
DEFAULT(escseq.arg[0], 1);
tdeleteline(escseq.arg[0]);
break;
case 'X': /* ECH -- Erase <n> char */
DEFAULT(escseq.arg[0], 1);
tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y);
break;
case 'P': /* DCH -- Delete <n> char */
DEFAULT(escseq.arg[0], 1);
tdeletechar(escseq.arg[0]);
break;
/* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation <n> tab stops */
case 'd': /* VPA -- Move to <row> */
DEFAULT(escseq.arg[0], 1);
tmoveto(term.c.x, escseq.arg[0]-1);
break;
case 'h': /* SM -- Set terminal mode */
if(escseq.priv) {
switch(escseq.arg[0]) {
case 1:
term.mode |= MODE_APPKEYPAD;
break;
case 5: /* DECSCNM -- Reverve video */
if(!IS_SET(MODE_REVERSE)) {
term.mode |= MODE_REVERSE;
draw();
}
break;
case 7:
term.mode |= MODE_WRAP;
break;
case 20:
term.mode |= MODE_CRLF;
break;
case 12: /* att610 -- Start blinking cursor (IGNORED) */
/* fallthrough for xterm cvvis = CSI [ ? 12 ; 25 h */
if(escseq.narg > 1 && escseq.arg[1] != 25)
break;
case 25:
term.c.state &= ~CURSOR_HIDE;
break;
case 1000: /* 1000,1002: enable xterm mouse report */
term.mode |= MODE_MOUSEBTN;
break;
case 1002:
term.mode |= MODE_MOUSEMOTION;
break;
case 1049: /* = 1047 and 1048 */
case 47:
case 1047:
if(IS_SET(MODE_ALTSCREEN))
tclearregion(0, 0, term.col-1, term.row-1);
else
tswapscreen();
if(escseq.arg[0] != 1049)
break;
case 1048:
tcursor(CURSOR_SAVE);
break;
default: goto unknown;
}
} else {
switch(escseq.arg[0]) {
case 4:
term.mode |= MODE_INSERT;
break;
default: goto unknown;
}
};
break;
case 'm': /* SGR -- Terminal attribute (color) */
tsetattr(escseq.arg, escseq.narg);
break;
case 'r': /* DECSTBM -- Set Scrolling Region */
if(escseq.priv)
goto unknown;
else {
DEFAULT(escseq.arg[0], 1);
DEFAULT(escseq.arg[1], term.row);
tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1);
tmoveto(0, 0);
}
break;
case 's': /* DECSC -- Save cursor position (ANSI.SYS) */
tcursor(CURSOR_SAVE);
break;
case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */
tcursor(CURSOR_LOAD);
break;
}
}
void
csidump(void) {
int i;
printf("ESC[");
for(i = 0; i < escseq.len; i++) {
uint c = escseq.buf[i] & 0xff;
if(isprint(c)) putchar(c);
else if(c == '\n') printf("(\\n)");
else if(c == '\r') printf("(\\r)");
else if(c == 0x1b) printf("(\\e)");
else printf("(%02x)", c);
}
putchar('\n');
}
void
csireset(void) {
memset(&escseq, 0, sizeof(escseq));
}
void
tputtab(void) {
int space = TAB - term.c.x % TAB;
tmoveto(term.c.x + space, term.c.y);
}
void
tputc(char *c) {
char ascii = *c;
if(term.esc & ESC_START) {
if(term.esc & ESC_CSI) {
escseq.buf[escseq.len++] = ascii;
if(BETWEEN(ascii, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) {
term.esc = 0;
csiparse(), csihandle();
}
/* TODO: handle other OSC */
} else if(term.esc & ESC_OSC) {
if(ascii == ';') {
term.titlelen = 0;
term.esc = ESC_START | ESC_TITLE;
}
} else if(term.esc & ESC_TITLE) {
if(ascii == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) {
term.esc = 0;
term.title[term.titlelen] = '\0';
XStoreName(xw.dpy, xw.win, term.title);
} else {
term.title[term.titlelen++] = ascii;
}
} else if(term.esc & ESC_ALTCHARSET) {
switch(ascii) {
case '0': /* Line drawing crap */
term.c.attr.mode |= ATTR_GFX;
break;
case 'B': /* Back to regular text */
term.c.attr.mode &= ~ATTR_GFX;
break;
default:
fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
}
term.esc = 0;
} else {
switch(ascii) {
case '[':
term.esc |= ESC_CSI;
break;
case ']':
term.esc |= ESC_OSC;
break;
case '(':
term.esc |= ESC_ALTCHARSET;
break;
case 'D': /* IND -- Linefeed */
if(term.c.y == term.bot)
tscrollup(term.top, 1);
else
tmoveto(term.c.x, term.c.y+1);
term.esc = 0;
break;
case 'E': /* NEL -- Next line */
tnewline(1); /* always go to first col */
term.esc = 0;
break;
case 'M': /* RI -- Reverse index */
if(term.c.y == term.top)
tscrolldown(term.top, 1);
else
tmoveto(term.c.x, term.c.y-1);
term.esc = 0;
break;
case 'c': /* RIS -- Reset to inital state */
treset();
term.esc = 0;
break;
case '=': /* DECPAM -- Application keypad */
term.mode |= MODE_APPKEYPAD;
term.esc = 0;
break;
case '>': /* DECPNM -- Normal keypad */
term.mode &= ~MODE_APPKEYPAD;
term.esc = 0;
break;
case '7': /* DECSC -- Save Cursor */
tcursor(CURSOR_SAVE);
term.esc = 0;
break;
case '8': /* DECRC -- Restore Cursor */
tcursor(CURSOR_LOAD);
term.esc = 0;
break;
default:
fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
(uchar) ascii, isprint(ascii)?ascii:'.');
term.esc = 0;
}
}
} else {
if(sel.bx != -1 && BETWEEN(term.c.y, sel.by, sel.ey))
sel.bx = -1;
switch(ascii) {
case '\t':
tputtab();
break;
case '\b':
tmoveto(term.c.x-1, term.c.y);
break;
case '\r':
tmoveto(0, term.c.y);
break;
case '\f':
case '\v':
case '\n':
/* go to first col if the mode is set */
tnewline(IS_SET(MODE_CRLF));
break;
case '\a':
if(!(xw.state & WIN_FOCUSED))
xseturgency(1);
break;
case '\033':
csireset();
term.esc = ESC_START;
break;
default:
if(IS_SET(MODE_WRAP) && term.c.state & CURSOR_WRAPNEXT)
tnewline(1); /* always go to first col */
tsetchar(c);
if(term.c.x+1 < term.col)
tmoveto(term.c.x+1, term.c.y);
else
term.c.state |= CURSOR_WRAPNEXT;
}
}
}
int
tresize(int col, int row) {
int i, x;
int minrow = MIN(row, term.row);
int mincol = MIN(col, term.col);
int slide = term.c.y - row + 1;
if(col < 1 || row < 1)
return 0;
/* free unneeded rows */
i = 0;
if(slide > 0) {
/* slide screen to keep cursor where we expect it -
* tscrollup would work here, but we can optimize to
* memmove because we're freeing the earlier lines */
for(/* i = 0 */; i < slide; i++) {
free(term.line[i]);
free(term.alt[i]);
}
memmove(term.line, term.line + slide, row * sizeof(Line));
memmove(term.alt, term.alt + slide, row * sizeof(Line));
}
for(i += row; i < term.row; i++) {
free(term.line[i]);
free(term.alt[i]);
}
/* resize to new height */
term.line = realloc(term.line, row * sizeof(Line));
term.alt = realloc(term.alt, row * sizeof(Line));
term.dirty = realloc(term.dirty, row * sizeof(*term.dirty));
term.tabs = realloc(term.tabs, col * sizeof(*term.tabs));
/* resize each row to new width, zero-pad if needed */
for(i = 0; i < minrow; i++) {
term.dirty[i] = 1;
term.line[i] = realloc(term.line[i], col * sizeof(Glyph));
term.alt[i] = realloc(term.alt[i], col * sizeof(Glyph));
for(x = mincol; x < col; x++) {
term.line[i][x].state = 0;
term.alt[i][x].state = 0;
}
}
/* allocate any new rows */
for(/* i == minrow */; i < row; i++) {
term.dirty[i] = 1;
term.line[i] = calloc(col, sizeof(Glyph));
term.alt [i] = calloc(col, sizeof(Glyph));
}
if (col > term.col) {
bool *bp = term.tabs + term.col;
memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
while (--bp > term.tabs && !*bp)
/* nothing */ ;
for (bp += TAB; bp < term.tabs + col; bp += TAB)
*bp = 1;
}
/* update terminal size */
term.col = col, term.row = row;
/* make use of the LIMIT in tmoveto */
tmoveto(term.c.x, term.c.y);
/* reset scrolling region */
tsetscroll(0, row-1);
return (slide > 0);
}
void
xresize(int col, int row) {
xw.w = MAX(1, 2*BORDER + col * xw.cw);
xw.h = MAX(1, 2*BORDER + row * xw.ch);
}
void
xloadcols(void) {
int i, r, g, b;
XColor color;
ulong white = WhitePixel(xw.dpy, xw.scr);
/* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
for(i = 0; i < LEN(colorname); i++) {
if(!colorname[i])
continue;
if(!XAllocNamedColor(xw.dpy, xw.cmap, colorname[i], &color, &color)) {
dc.col[i] = white;
fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]);
} else
dc.col[i] = color.pixel;
}
/* load colors [16-255] ; same colors as xterm */
for(i = 16, r = 0; r < 6; r++)
for(g = 0; g < 6; g++)
for(b = 0; b < 6; b++) {
color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r;
color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g;
color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b;
if(!XAllocColor(xw.dpy, xw.cmap, &color)) {
dc.col[i] = white;
fprintf(stderr, "Could not allocate color %d\n", i);
} else
dc.col[i] = color.pixel;
i++;
}
for(r = 0; r < 24; r++, i++) {
color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
if (!XAllocColor(xw.dpy, xw.cmap, &color)) {
dc.col[i] = white;
fprintf(stderr, "Could not allocate color %d\n", i);
} else
dc.col[i] = color.pixel;
}
}
void
xclear(int x1, int y1, int x2, int y2) {
XSetForeground(xw.dpy, dc.gc, dc.col[IS_SET(MODE_REVERSE) ? DefaultFG : DefaultBG]);
XFillRectangle(xw.dpy, xw.buf, dc.gc,
BORDER + x1 * xw.cw, BORDER + y1 * xw.ch,
(x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch);
}
void
xhints(void) {
XClassHint class = {opt_class ? opt_class : TNAME, TNAME};
XWMHints wm = {.flags = InputHint, .input = 1};
XSizeHints size = {
.flags = PSize | PResizeInc | PBaseSize,
.height = xw.h,
.width = xw.w,
.height_inc = xw.ch,
.width_inc = xw.cw,
.base_height = 2*BORDER,
.base_width = 2*BORDER,
};
XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class);
}
XFontSet
xinitfont(char *fontstr) {
XFontSet set;
char *def, **missing;
int n;
missing = NULL;
set = XCreateFontSet(xw.dpy, fontstr, &missing, &n, &def);
if(missing) {
while(n--)
fprintf(stderr, "st: missing fontset: %s\n", missing[n]);
XFreeStringList(missing);
}
return set;
}
void
xgetfontinfo(XFontSet set, int *ascent, int *descent, short *lbearing, short *rbearing) {
XFontStruct **xfonts;
char **font_names;
int i, n;
*ascent = *descent = *lbearing = *rbearing = 0;
n = XFontsOfFontSet(set, &xfonts, &font_names);
for(i = 0; i < n; i++) {
*ascent = MAX(*ascent, (*xfonts)->ascent);
*descent = MAX(*descent, (*xfonts)->descent);
*lbearing = MAX(*lbearing, (*xfonts)->min_bounds.lbearing);
*rbearing = MAX(*rbearing, (*xfonts)->max_bounds.rbearing);
xfonts++;
}
}
void
initfonts(char *fontstr, char *bfontstr) {
if((dc.font.set = xinitfont(fontstr)) == NULL ||
(dc.bfont.set = xinitfont(bfontstr)) == NULL)
die("Can't load font %s\n", dc.font.set ? BOLDFONT : FONT);
xgetfontinfo(dc.font.set, &dc.font.ascent, &dc.font.descent,
&dc.font.lbearing, &dc.font.rbearing);
xgetfontinfo(dc.bfont.set, &dc.bfont.ascent, &dc.bfont.descent,
&dc.bfont.lbearing, &dc.bfont.rbearing);
}
void
xinit(void) {
XSetWindowAttributes attrs;
Cursor cursor;
Window parent;
if(!(xw.dpy = XOpenDisplay(NULL)))
die("Can't open display\n");
xw.scr = XDefaultScreen(xw.dpy);
/* font */
initfonts(FONT, BOLDFONT);
/* XXX: Assuming same size for bold font */
xw.cw = dc.font.rbearing - dc.font.lbearing;
xw.ch = dc.font.ascent + dc.font.descent;
/* colors */
xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
xloadcols();
/* window - default size */
xw.h = 2*BORDER + term.row * xw.ch;
xw.w = 2*BORDER + term.col * xw.cw;
attrs.background_pixel = dc.col[DefaultBG];
attrs.border_pixel = dc.col[DefaultBG];
attrs.bit_gravity = NorthWestGravity;
attrs.event_mask = FocusChangeMask | KeyPressMask
| ExposureMask | VisibilityChangeMask | StructureNotifyMask
| ButtonMotionMask | ButtonPressMask | ButtonReleaseMask
| EnterWindowMask | LeaveWindowMask;
attrs.colormap = xw.cmap;
parent = opt_embed ? strtol(opt_embed, NULL, 0) : XRootWindow(xw.dpy, xw.scr);
xw.win = XCreateWindow(xw.dpy, parent, 0, 0,
xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
XDefaultVisual(xw.dpy, xw.scr),
CWBackPixel | CWBorderPixel | CWBitGravity | CWEventMask
| CWColormap,
&attrs);
xw.buf = XdbeAllocateBackBufferName(xw.dpy, xw.win, XdbeCopied);
/* input methods */
xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL);
xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
| XIMStatusNothing, XNClientWindow, xw.win,
XNFocusWindow, xw.win, NULL);
/* gc */
dc.gc = XCreateGC(xw.dpy, xw.win, 0, NULL);
/* white cursor, black outline */
cursor = XCreateFontCursor(xw.dpy, XC_xterm);
XDefineCursor(xw.dpy, xw.win, cursor);
XRecolorCursor(xw.dpy, cursor,
&(XColor){.red = 0xffff, .green = 0xffff, .blue = 0xffff},
&(XColor){.red = 0x0000, .green = 0x0000, .blue = 0x0000});
xw.xembed = XInternAtom(xw.dpy, "_XEMBED", False);
XStoreName(xw.dpy, xw.win, opt_title ? opt_title : "st");
XMapWindow(xw.dpy, xw.win);
xhints();
XSync(xw.dpy, 0);
}
void
xdraws(char *s, Glyph base, int x, int y, int charlen, int bytelen) {
int fg = base.fg, bg = base.bg, temp;
int winx = BORDER+x*xw.cw, winy = BORDER+y*xw.ch + dc.font.ascent, width = charlen*xw.cw;
XFontSet fontset = dc.font.set;
int i;
/* only switch default fg/bg if term is in RV mode */
if(IS_SET(MODE_REVERSE)) {
if(fg == DefaultFG)
fg = DefaultBG;
if(bg == DefaultBG)
bg = DefaultFG;
}
if(base.mode & ATTR_REVERSE)
temp = fg, fg = bg, bg = temp;
if(base.mode & ATTR_BOLD) {
fg += 8;
fontset = dc.bfont.set;
}
XSetBackground(xw.dpy, dc.gc, dc.col[bg]);
XSetForeground(xw.dpy, dc.gc, dc.col[fg]);
if(base.mode & ATTR_GFX) {
for(i = 0; i < bytelen; i++) {
char c = gfx[(uint)s[i] % 256];
if(c)
s[i] = c;
else if(s[i] > 0x5f)
s[i] -= 0x5f;
}
}
XmbDrawImageString(xw.dpy, xw.buf, fontset, dc.gc, winx, winy, s, bytelen);
if(base.mode & ATTR_UNDERLINE)
XDrawLine(xw.dpy, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1);
}
/* copy buffer pixmap to screen pixmap */
void
xcopy() {
XdbeSwapInfo swpinfo[1] = {{xw.win, XdbeCopied}};
XdbeSwapBuffers(xw.dpy, swpinfo, 1);
}
void
xdrawcursor(void) {
static int oldx = 0;
static int oldy = 0;
int sl;
Glyph g = {{' '}, ATTR_NULL, DefaultBG, DefaultCS, 0};
LIMIT(oldx, 0, term.col-1);
LIMIT(oldy, 0, term.row-1);
if(term.line[term.c.y][term.c.x].state & GLYPH_SET)
memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
/* remove the old cursor */
if(term.line[oldy][oldx].state & GLYPH_SET) {
sl = utf8size(term.line[oldy][oldx].c);
xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1, sl);
} else
xclear(oldx, oldy, oldx, oldy);
xcopy(oldx, oldy, 1, 1);
/* draw the new one */
if(!(term.c.state & CURSOR_HIDE)) {
if(!(xw.state & WIN_FOCUSED))
g.bg = DefaultUCS;
if(IS_SET(MODE_REVERSE))
g.mode |= ATTR_REVERSE, g.fg = DefaultCS, g.bg = DefaultFG;
sl = utf8size(g.c);
xdraws(g.c, g, term.c.x, term.c.y, 1, sl);
oldx = term.c.x, oldy = term.c.y;
}
xcopy(term.c.x, term.c.y, 1, 1);
}
void
draw() {
drawregion(0, 0, term.col, term.row);
xcopy();
gettimeofday(&xw.lastdraw, NULL);
}
void
drawregion(int x1, int y1, int x2, int y2) {
int ic, ib, x, y, ox, sl;
Glyph base, new;
char buf[DRAW_BUF_SIZ];
if(!(xw.state & WIN_VISIBLE))
return;
for(y = y1; y < y2; y++) {
if(!term.dirty[y])
continue;
xclear(0, y, term.col, y);
term.dirty[y] = 0;
base = term.line[y][0];
ic = ib = ox = 0;
for(x = x1; x < x2; x++) {
new = term.line[y][x];
if(sel.bx != -1 && *(new.c) && selected(x, y))
new.mode ^= ATTR_REVERSE;
if(ib > 0 && (!(new.state & GLYPH_SET) || ATTRCMP(base, new) ||
ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
xdraws(buf, base, ox, y, ic, ib);
ic = ib = 0;
}
if(new.state & GLYPH_SET) {
if(ib == 0) {
ox = x;
base = new;
}
sl = utf8size(new.c);
memcpy(buf+ib, new.c, sl);
ib += sl;
++ic;
}
}
if(ib > 0)
xdraws(buf, base, ox, y, ic, ib);
}
xdrawcursor();
}
void
expose(XEvent *ev) {
XExposeEvent *e = &ev->xexpose;
if(xw.state & WIN_REDRAW) {
if(!e->count)
xw.state &= ~WIN_REDRAW;
}
xcopy();
}
void
visibility(XEvent *ev) {
XVisibilityEvent *e = &ev->xvisibility;
if(e->state == VisibilityFullyObscured)
xw.state &= ~WIN_VISIBLE;
else if(!(xw.state & WIN_VISIBLE))
/* need a full redraw for next Expose, not just a buf copy */
xw.state |= WIN_VISIBLE | WIN_REDRAW;
}
void
unmap(XEvent *ev) {
xw.state &= ~WIN_VISIBLE;
}
void
xseturgency(int add) {
XWMHints *h = XGetWMHints(xw.dpy, xw.win);
h->flags = add ? (h->flags | XUrgencyHint) : (h->flags & ~XUrgencyHint);
XSetWMHints(xw.dpy, xw.win, h);
XFree(h);
}
void
focus(XEvent *ev) {
if(ev->type == FocusIn) {
xw.state |= WIN_FOCUSED;
xseturgency(0);
} else
xw.state &= ~WIN_FOCUSED;
draw();
}
char*
kmap(KeySym k, uint state) {
int i;
state &= ~Mod2Mask;
for(i = 0; i < LEN(key); i++) {
uint mask = key[i].mask;
if(key[i].k == k && ((state & mask) == mask || (mask == XK_NO_MOD && !state)))
return (char*)key[i].s;
}
return NULL;
}
void
kpress(XEvent *ev) {
XKeyEvent *e = &ev->xkey;
KeySym ksym;
char buf[32];
char *customkey;
int len;
int meta;
int shift;
Status status;
meta = e->state & Mod1Mask;
shift = e->state & ShiftMask;
len = XmbLookupString(xw.xic, e, buf, sizeof(buf), &ksym, &status);
/* 1. custom keys from config.h */
if((customkey = kmap(ksym, e->state)))
ttywrite(customkey, strlen(customkey));
/* 2. hardcoded (overrides X lookup) */
else
switch(ksym) {
case XK_Up:
case XK_Down:
case XK_Left:
case XK_Right:
/* XXX: shift up/down doesn't work */
sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', (shift ? "dacb":"DACB")[ksym - XK_Left]);
ttywrite(buf, 3);
break;
case XK_Insert:
if(shift)
selpaste();
break;
case XK_Return:
if(IS_SET(MODE_CRLF))
ttywrite("\r\n", 2);
else
ttywrite("\r", 1);
break;
/* 3. X lookup */
default:
if(len > 0) {
if(meta && len == 1)
ttywrite("\033", 1);
ttywrite(buf, len);
}
break;
}
}
void
cmessage(XEvent *e) {
/* See xembed specs
http://standards.freedesktop.org/xembed-spec/xembed-spec-latest.html */
if (e->xclient.message_type == xw.xembed && e->xclient.format == 32) {
if (e->xclient.data.l[1] == XEMBED_FOCUS_IN) {
xw.state |= WIN_FOCUSED;
xseturgency(0);
} else if (e->xclient.data.l[1] == XEMBED_FOCUS_OUT) {
xw.state &= ~WIN_FOCUSED;
}
draw();
}
}
void
resize(XEvent *e) {
int col, row;
if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
return;
xw.w = e->xconfigure.width;
xw.h = e->xconfigure.height;
col = (xw.w - 2*BORDER) / xw.cw;
row = (xw.h - 2*BORDER) / xw.ch;
if(col == term.col && row == term.row)
return;
if(tresize(col, row))
draw();
ttyresize(col, row);
xresize(col, row);
}
bool
last_draw_too_old(void) {
struct timeval now;
gettimeofday(&now, NULL);
return TIMEDIFF(now, xw.lastdraw) >= DRAW_TIMEOUT/1000;
}
void
run(void) {
XEvent ev;
fd_set rfd;
int xfd = XConnectionNumber(xw.dpy);
struct timeval timeout = {0};
bool stuff_to_print = 0;
for(;;) {
FD_ZERO(&rfd);
FD_SET(cmdfd, &rfd);
FD_SET(xfd, &rfd);
timeout.tv_sec = 0;
timeout.tv_usec = SELECT_TIMEOUT;
if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, &timeout) < 0) {
if(errno == EINTR)
continue;
die("select failed: %s\n", SERRNO);
}
if(FD_ISSET(cmdfd, &rfd)) {
ttyread();
stuff_to_print = 1;
}
if(stuff_to_print && last_draw_too_old()) {
stuff_to_print = 0;
draw();
}
while(XPending(xw.dpy)) {
XNextEvent(xw.dpy, &ev);
if(XFilterEvent(&ev, xw.win))
continue;
if(handler[ev.type])
(handler[ev.type])(&ev);
}
}
}
int
main(int argc, char *argv[]) {
int i;
for(i = 1; i < argc; i++) {
switch(argv[i][0] != '-' || argv[i][2] ? -1 : argv[i][1]) {
case 't':
if(++i < argc) opt_title = argv[i];
break;
case 'c':
if(++i < argc) opt_class = argv[i];
break;
case 'w':
if(++i < argc) opt_embed = argv[i];
break;
case 'e':
/* eat every remaining arguments */
if(++i < argc) opt_cmd = &argv[i];
goto run;
case 'v':
default:
die(USAGE);
}
}
run:
setlocale(LC_CTYPE, "");
tnew(80, 24);
ttynew();
xinit();
selinit();
run();
return 0;
}
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