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This file contains ambiguous Unicode characters!

This file contains ambiguous Unicode characters that may be confused with others in your current locale. If your use case is intentional and legitimate, you can safely ignore this warning. Use the Escape button to highlight these characters.

/* See LICENSE for licence details. */
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <locale.h>
#include <pwd.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 <libgen.h>
#include <X11/Xatom.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/cursorfont.h>
#include <X11/keysym.h>
#include <X11/Xft/Xft.h>
#include <fontconfig/fontconfig.h>
#include "arg.h"
char *argv0;
#define Glyph Glyph_
#define Font Font_
#define Draw XftDraw *
#define Colour XftColor
#define Colourmap Colormap
#define Rectangle XRectangle
#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
/* XEMBED messages */
#define XEMBED_FOCUS_IN 4
#define XEMBED_FOCUS_OUT 5
/* Arbitrary sizes */
#define UTF_SIZ 4
#define ESC_BUF_SIZ (128*UTF_SIZ)
#define ESC_ARG_SIZ 16
#define STR_BUF_SIZ ESC_BUF_SIZ
#define STR_ARG_SIZ ESC_ARG_SIZ
#define DRAW_BUF_SIZ 20*1024
#define XK_ANY_MOD UINT_MAX
#define XK_NO_MOD 0
#define XK_SWITCH_MOD (1<<13)
#define REDRAW_TIMEOUT (80*1000) /* 80 ms */
/* macros */
#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)) != 0)
#define TIMEDIFF(t1, t2) ((t1.tv_sec-t2.tv_sec)*1000 + (t1.tv_usec-t2.tv_usec)/1000)
#define VT102ID "\033[?6c"
enum glyph_attribute {
ATTR_NULL = 0,
ATTR_REVERSE = 1,
ATTR_UNDERLINE = 2,
ATTR_BOLD = 4,
ATTR_GFX = 8,
ATTR_ITALIC = 16,
ATTR_BLINK = 32,
ATTR_WRAP = 64,
};
enum cursor_movement {
CURSOR_SAVE,
CURSOR_LOAD
};
enum cursor_state {
CURSOR_DEFAULT = 0,
CURSOR_WRAPNEXT = 1,
CURSOR_ORIGIN = 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_REVERSE = 128,
MODE_KBDLOCK = 256,
MODE_HIDE = 512,
MODE_ECHO = 1024,
MODE_APPCURSOR = 2048,
MODE_MOUSESGR = 4096,
MODE_8BIT = 8192,
MODE_BLINK = 16384,
MODE_FBLINK = 32768,
MODE_FOCUS = 65536,
MODE_MOUSEX10 = 131072,
MODE_MOUSEMANY = 262144,
MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
|MODE_MOUSEMANY,
};
enum escape_state {
ESC_START = 1,
ESC_CSI = 2,
ESC_STR = 4, /* DSC, OSC, PM, APC */
ESC_ALTCHARSET = 8,
ESC_STR_END = 16, /* a final string was encountered */
ESC_TEST = 32, /* Enter in test mode */
};
enum window_state {
WIN_VISIBLE = 1,
WIN_REDRAW = 2,
WIN_FOCUSED = 4
};
enum selection_type {
SEL_REGULAR = 1,
SEL_RECTANGULAR = 2
};
enum selection_snap {
SNAP_WORD = 1,
SNAP_LINE = 2
};
/* 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 */
} 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;
/* STR Escape sequence structs */
/* ESC type [[ [<priv>] <arg> [;]] <mode>] ESC '\' */
typedef struct {
char type; /* ESC type ... */
char buf[STR_BUF_SIZ]; /* raw string */
int len; /* raw string length */
char *args[STR_ARG_SIZ];
int narg; /* nb of args */
} STREscape;
/* 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 */
bool numlock; /* lock numbers in keyboard */
bool *tabs;
} Term;
/* Purely graphic info */
typedef struct {
Display *dpy;
Colourmap cmap;
Window win;
Drawable buf;
Atom xembed, wmdeletewin;
XIM xim;
XIC xic;
Draw draw;
Visual *vis;
XSetWindowAttributes attrs;
int scr;
bool isfixed; /* is fixed geometry? */
int fx, fy, fw, fh; /* fixed geometry */
int tw, th; /* tty width and height */
int w, h; /* window width and height */
int ch; /* char height */
int cw; /* char width */
char state; /* focus, redraw, visible */
} XWindow;
typedef struct {
int b;
uint mask;
char s[ESC_BUF_SIZ];
} Mousekey;
typedef struct {
KeySym k;
uint mask;
char s[ESC_BUF_SIZ];
/* three valued logic variables: 0 indifferent, 1 on, -1 off */
signed char appkey; /* application keypad */
signed char appcursor; /* application cursor */
signed char crlf; /* crlf mode */
} Key;
typedef struct {
int mode;
int type;
int snap;
/*
* Selection variables:
* nb – normalized coordinates of the beginning of the selection
* ne – normalized coordinates of the end of the selection
* ob – original coordinates of the beginning of the selection
* oe – original coordinates of the end of the selection
*/
struct {
int x, y;
} nb, ne, ob, oe;
char *clip;
Atom xtarget;
bool alt;
struct timeval tclick1;
struct timeval tclick2;
} Selection;
typedef union {
int i;
unsigned int ui;
float f;
const void *v;
} Arg;
typedef struct {
unsigned int mod;
KeySym keysym;
void (*func)(const Arg *);
const Arg arg;
} Shortcut;
/* function definitions used in config.h */
static void clippaste(const Arg *);
static void numlock(const Arg *);
static void selpaste(const Arg *);
static void xzoom(const Arg *);
/* Config.h for applying patches and the configuration. */
#include "config.h"
/* Font structure */
typedef struct {
int height;
int width;
int ascent;
int descent;
short lbearing;
short rbearing;
XftFont *match;
FcFontSet *set;
FcPattern *pattern;
} Font;
/* Drawing Context */
typedef struct {
Colour col[LEN(colorname) < 256 ? 256 : LEN(colorname)];
Font font, bfont, ifont, ibfont;
GC gc;
} DC;
static void die(const char *, ...);
static void draw(void);
static void redraw(int);
static void drawregion(int, int, int, int);
static void execsh(void);
static void sigchld(int);
static void run(void);
static void csidump(void);
static void csihandle(void);
static void csiparse(void);
static void csireset(void);
static void strdump(void);
static void strhandle(void);
static void strparse(void);
static void strreset(void);
static int tattrset(int);
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 tmoveato(int x, int y);
static void tnew(int, int);
static void tnewline(int);
static void tputtab(bool);
static void tputc(char *, int);
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 *, Glyph *, int, int);
static void tsetscroll(int, int);
static void tswapscreen(void);
static void tsetdirt(int, int);
static void tsetdirtattr(int);
static void tsetmode(bool, bool, int *, int);
static void tfulldirt(void);
static void techo(char *, int);
static inline bool match(uint, uint);
static void ttynew(void);
static void ttyread(void);
static void ttyresize(void);
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 xdrawcursor(void);
static void xinit(void);
static void xloadcols(void);
static int xsetcolorname(int, const char *);
static int xloadfont(Font *, FcPattern *);
static void xloadfonts(char *, int);
static int xloadfontset(Font *);
static void xsettitle(char *);
static void xresettitle(void);
static void xsetpointermotion(int);
static void xseturgency(int);
static void xsetsel(char*);
static void xtermclear(int, int, int, int);
static void xunloadfont(Font *f);
static void xunloadfonts(void);
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 cresize(int, int);
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 selclear(XEvent *);
static void selrequest(XEvent *);
static void selinit(void);
static void selsort(void);
static inline bool selected(int, int);
static void selcopy(void);
static void selscroll(int, int);
static void selsnap(int, int *, int *, int);
static int utf8decode(char *, long *);
static int utf8encode(long *, char *);
static int utf8size(char *);
static int isfullutf8(char *, int);
static ssize_t xwrite(int, char *, size_t);
static void *xmalloc(size_t);
static void *xrealloc(void *, size_t);
static void *xcalloc(size_t, size_t);
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,
[SelectionClear] = selclear,
[SelectionNotify] = selnotify,
[SelectionRequest] = selrequest,
};
/* Globals */
static DC dc;
static XWindow xw;
static Term term;
static CSIEscape csiescseq;
static STREscape strescseq;
static int cmdfd;
static pid_t pid;
static Selection sel;
static int iofd = -1;
static char **opt_cmd = NULL;
static char *opt_io = NULL;
static char *opt_title = NULL;
static char *opt_embed = NULL;
static char *opt_class = NULL;
static char *opt_font = NULL;
static int oldbutton = 3; /* button event on startup: 3 = release */
static char *usedfont = NULL;
static int usedfontsize = 0;
/* Font Ring Cache */
enum {
FRC_NORMAL,
FRC_ITALIC,
FRC_BOLD,
FRC_ITALICBOLD
};
typedef struct {
XftFont *font;
long c;
int flags;
} Fontcache;
/*
* Fontcache is a ring buffer, with frccur as current position and frclen as
* the current length of used elements.
*/
static Fontcache frc[1024];
static int frccur = -1, frclen = 0;
ssize_t
xwrite(int fd, char *s, size_t len) {
size_t aux = len;
while(len > 0) {
ssize_t r = write(fd, s, len);
if(r < 0)
return r;
len -= r;
s += r;
}
return aux;
}
void *
xmalloc(size_t len) {
void *p = malloc(len);
if(!p)
die("Out of memory\n");
return p;
}
void *
xrealloc(void *p, size_t len) {
if((p = realloc(p, len)) == NULL)
die("Out of memory\n");
return p;
}
void *
xcalloc(size_t nmemb, size_t size) {
void *p = calloc(nmemb, size);
if(!p)
die("Out of memory\n");
return p;
}
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;
}
}
static void
selinit(void) {
memset(&sel.tclick1, 0, sizeof(sel.tclick1));
memset(&sel.tclick2, 0, sizeof(sel.tclick2));
sel.mode = 0;
sel.ob.x = -1;
sel.clip = NULL;
sel.xtarget = XInternAtom(xw.dpy, "UTF8_STRING", 0);
if(sel.xtarget == None)
sel.xtarget = XA_STRING;
}
static int
x2col(int x) {
x -= borderpx;
x /= xw.cw;
return LIMIT(x, 0, term.col-1);
}
static int
y2row(int y) {
y -= borderpx;
y /= xw.ch;
return LIMIT(y, 0, term.row-1);
}
static void
selsort(void) {
if(sel.ob.y == sel.oe.y) {
sel.nb.x = MIN(sel.ob.x, sel.oe.x);
sel.ne.x = MAX(sel.ob.x, sel.oe.x);
} else {
sel.nb.x = sel.ob.y < sel.oe.y ? sel.ob.x : sel.oe.x;
sel.ne.x = sel.ob.y < sel.oe.y ? sel.oe.x : sel.ob.x;
}
sel.nb.y = MIN(sel.ob.y, sel.oe.y);
sel.ne.y = MAX(sel.ob.y, sel.oe.y);
}
static inline bool
selected(int x, int y) {
if(sel.ne.y == y && sel.nb.y == y)
return BETWEEN(x, sel.nb.x, sel.ne.x);
if(sel.type == SEL_RECTANGULAR) {
return ((sel.nb.y <= y && y <= sel.ne.y)
&& (sel.nb.x <= x && x <= sel.ne.x));
}
return ((sel.nb.y < y && y < sel.ne.y)
|| (y == sel.ne.y && x <= sel.ne.x))
|| (y == sel.nb.y && x >= sel.nb.x
&& (x <= sel.ne.x || sel.nb.y != sel.ne.y));
}
void
selsnap(int mode, int *x, int *y, int direction) {
int i;
switch(mode) {
case SNAP_WORD:
/*
* Snap around if the word wraps around at the end or
* beginning of a line.
*/
for(;;) {
if(direction < 0 && *x <= 0) {
if(*y > 0 && term.line[*y - 1][term.col-1].mode
& ATTR_WRAP) {
*y -= 1;
*x = term.col-1;
} else {
break;
}
}
if(direction > 0 && *x >= term.col-1) {
if(*y < term.row-1 && term.line[*y][*x].mode
& ATTR_WRAP) {
*y += 1;
*x = 0;
} else {
break;
}
}
if(strchr(worddelimiters,
term.line[*y][*x + direction].c[0])) {
break;
}
*x += direction;
}
break;
case SNAP_LINE:
/*
* Snap around if the the previous line or the current one
* has set ATTR_WRAP at its end. Then the whole next or
* previous line will be selected.
*/
*x = (direction < 0) ? 0 : term.col - 1;
if(direction < 0 && *y > 0) {
for(; *y > 0; *y += direction) {
if(!(term.line[*y-1][term.col-1].mode
& ATTR_WRAP)) {
break;
}
}
} else if(direction > 0 && *y < term.row-1) {
for(; *y < term.row; *y += direction) {
if(!(term.line[*y][term.col-1].mode
& ATTR_WRAP)) {
break;
}
}
}
break;
default:
/*
* Select the whole line when the end of line is reached.
*/
if(direction > 0) {
i = term.col;
while(--i > 0 && term.line[*y][i].c[0] == ' ')
/* nothing */;
if(i > 0 && i < *x)
*x = term.col - 1;
}
break;
}
}
void
getbuttoninfo(XEvent *e) {
int type;
uint state = e->xbutton.state &~Button1Mask;
sel.alt = IS_SET(MODE_ALTSCREEN);
sel.oe.x = x2col(e->xbutton.x);
sel.oe.y = y2row(e->xbutton.y);
if(sel.ob.y < sel.oe.y
|| (sel.ob.y == sel.oe.y && sel.ob.x < sel.oe.x)) {
selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
} else {
selsnap(sel.snap, &sel.oe.x, &sel.oe.y, -1);
selsnap(sel.snap, &sel.ob.x, &sel.ob.y, +1);
}
selsort();
sel.type = SEL_REGULAR;
for(type = 1; type < LEN(selmasks); ++type) {
if(match(selmasks[type], state)) {
sel.type = type;
break;
}
}
}
void
mousereport(XEvent *e) {
int x = x2col(e->xbutton.x), y = y2row(e->xbutton.y),
button = e->xbutton.button, state = e->xbutton.state,
len;
char buf[40];
static int ox, oy;
/* from urxvt */
if(e->xbutton.type == MotionNotify) {
if(x == ox && y == oy)
return;
if(!IS_SET(MODE_MOUSEMOTION) && !IS_SET(MODE_MOUSEMANY))
return;
/* MOUSE_MOTION: no reporting if no button is pressed */
if(IS_SET(MODE_MOUSEMOTION) && oldbutton == 3)
return;
button = oldbutton + 32;
ox = x;
oy = y;
} else if(!IS_SET(MODE_MOUSESGR)
&& (e->xbutton.type == ButtonRelease
|| button == AnyButton)) {
button = 3;
} else {
button -= Button1;
if(button >= 3)
button += 64 - 3;
if(e->xbutton.type == ButtonPress) {
oldbutton = button;
ox = x;
oy = y;
}
}
if(!IS_SET(MODE_MOUSEX10)) {
button += (state & ShiftMask ? 4 : 0)
+ (state & Mod4Mask ? 8 : 0)
+ (state & ControlMask ? 16 : 0);
}
len = 0;
if(IS_SET(MODE_MOUSESGR)) {
len = snprintf(buf, sizeof(buf), "\033[<%d;%d;%d%c",
button, x+1, y+1,
e->xbutton.type == ButtonRelease ? 'm' : 'M');
} else if(x < 223 && y < 223) {
len = snprintf(buf, sizeof(buf), "\033[M%c%c%c",
IS_SET(MODE_MOUSEX10)? button-1 : 32+button,
32+x+1, 32+y+1);
} else {
return;
}
ttywrite(buf, len);
}
void
bpress(XEvent *e) {
struct timeval now;
Mousekey *mk;
if(IS_SET(MODE_MOUSE)) {
mousereport(e);
return;
}
for(mk = mshortcuts; mk < mshortcuts + LEN(mshortcuts); mk++) {
if(e->xbutton.button == mk->b
&& match(mk->mask, e->xbutton.state)) {
ttywrite(mk->s, strlen(mk->s));
if(IS_SET(MODE_ECHO))
techo(mk->s, strlen(mk->s));
return;
}
}
if(e->xbutton.button == Button1) {
gettimeofday(&now, NULL);
/* Clear previous selection, logically and visually. */
selclear(NULL);
sel.mode = 1;
sel.type = SEL_REGULAR;
sel.oe.x = sel.ob.x = x2col(e->xbutton.x);
sel.oe.y = sel.ob.y = y2row(e->xbutton.y);
/*
* If the user clicks below predefined timeouts specific
* snapping behaviour is exposed.
*/
if(TIMEDIFF(now, sel.tclick2) <= tripleclicktimeout) {
sel.snap = SNAP_LINE;
} else if(TIMEDIFF(now, sel.tclick1) <= doubleclicktimeout) {
sel.snap = SNAP_WORD;
} else {
sel.snap = 0;
}
selsnap(sel.snap, &sel.ob.x, &sel.ob.y, -1);
selsnap(sel.snap, &sel.oe.x, &sel.oe.y, +1);
selsort();
/*
* Draw selection, unless it's regular and we don't want to
* make clicks visible
*/
if(sel.snap != 0) {
sel.mode++;
tsetdirt(sel.nb.y, sel.ne.y);
}
sel.tclick2 = sel.tclick1;
sel.tclick1 = now;
}
}
void
selcopy(void) {
char *str, *ptr;
int x, y, bufsize, size, i, ex;
Glyph *gp, *last;
if(sel.ob.x == -1) {
str = NULL;
} else {
bufsize = (term.col+1) * (sel.ne.y-sel.nb.y+1) * UTF_SIZ;
ptr = str = xmalloc(bufsize);
/* append every set & selected glyph to the selection */
for(y = sel.nb.y; y < sel.ne.y + 1; y++) {
gp = &term.line[y][0];
last = gp + term.col;
while(--last >= gp && !(selected(last - gp, y) && \
strcmp(last->c, " ") != 0))
/* nothing */;
for(x = 0; gp <= last; x++, ++gp) {
if(!selected(x, y))
continue;
size = utf8size(gp->c);
memcpy(ptr, gp->c, size);
ptr += size;
}
/*
* Copy and pasting of line endings is inconsistent
* in the inconsistent terminal and GUI world.
* The best solution seems like to produce '\n' when
* something is copied from st and convert '\n' to
* '\r', when something to be pasted is received by
* st.
* FIXME: Fix the computer world.
*/
if(y < sel.ne.y && !((gp-1)->mode & ATTR_WRAP))
*ptr++ = '\n';
/*
* If the last selected line expands in the selection
* after the visible text '\n' is appended.
*/
if(y == sel.ne.y) {
i = term.col;
while(--i > 0 && term.line[y][i].c[0] == ' ')
/* nothing */;
ex = sel.ne.x;
if(sel.nb.y == sel.ne.y && sel.ne.x < sel.nb.x)
ex = sel.nb.x;
if(i < ex)
*ptr++ = '\n';
}
}
*ptr = 0;
}
xsetsel(str);
}
void
selnotify(XEvent *e) {
ulong nitems, ofs, rem;
int format;
uchar *data, *last, *repl;
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;
}
/*
* As seen in selcopy:
* Line endings are inconsistent in the terminal and GUI world
* copy and pasting. When receiving some selection data,
* replace all '\n' with '\r'.
* FIXME: Fix the computer world.
*/
repl = data;
last = data + nitems * format / 8;
while((repl = memchr(repl, '\n', last - repl))) {
*repl++ = '\r';
}
ttywrite((const char *)data, nitems * format / 8);
XFree(data);
/* number of 32-bit chunks returned */
ofs += nitems * format / 32;
} while(rem > 0);
}
void
selpaste(const Arg *dummy) {
XConvertSelection(xw.dpy, XA_PRIMARY, sel.xtarget, XA_PRIMARY,
xw.win, CurrentTime);
}
void
clippaste(const Arg *dummy) {
Atom clipboard;
clipboard = XInternAtom(xw.dpy, "CLIPBOARD", 0);
XConvertSelection(xw.dpy, clipboard, sel.xtarget, XA_PRIMARY,
xw.win, CurrentTime);
}
void
selclear(XEvent *e) {
if(sel.ob.x == -1)
return;
sel.ob.x = -1;
tsetdirt(sel.nb.y, sel.ne.y);
}
void
selrequest(XEvent *e) {
XSelectionRequestEvent *xsre;
XSelectionEvent xev;
Atom xa_targets, string;
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 */
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);
}
void
brelease(XEvent *e) {
if(IS_SET(MODE_MOUSE)) {
mousereport(e);
return;
}
if(e->xbutton.button == Button2) {
selpaste(NULL);
} else if(e->xbutton.button == Button1) {
if(sel.mode < 2) {
selclear(NULL);
} else {
getbuttoninfo(e);
selcopy();
}
sel.mode = 0;
tsetdirt(sel.nb.y, sel.ne.y);
}
}
void
bmotion(XEvent *e) {
int oldey, oldex, oldsby, oldsey;
if(IS_SET(MODE_MOUSE)) {
mousereport(e);
return;
}
if(!sel.mode)
return;
sel.mode++;
oldey = sel.oe.y;
oldex = sel.oe.x;
oldsby = sel.nb.y;
oldsey = sel.ne.y;
getbuttoninfo(e);
if(oldey != sel.oe.y || oldex != sel.oe.x)
tsetdirt(MIN(sel.nb.y, oldsby), MAX(sel.ne.y, oldsey));
}
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");
const struct passwd *pass = getpwuid(getuid());
char buf[sizeof(long) * 8 + 1];
unsetenv("COLUMNS");
unsetenv("LINES");
unsetenv("TERMCAP");
if(pass) {
setenv("LOGNAME", pass->pw_name, 1);
setenv("USER", pass->pw_name, 1);
setenv("SHELL", pass->pw_shell, 0);
setenv("HOME", pass->pw_dir, 0);
}
snprintf(buf, sizeof(buf), "%lu", xw.win);
setenv("WINDOWID", buf, 1);
signal(SIGCHLD, SIG_DFL);
signal(SIGHUP, SIG_DFL);
signal(SIGINT, SIG_DFL);
signal(SIGQUIT, SIG_DFL);
signal(SIGTERM, SIG_DFL);
signal(SIGALRM, SIG_DFL);
DEFAULT(envshell, shell);
setenv("TERM", termname, 1);
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;
struct winsize w = {term.row, term.col, 0, 0};
/* seems to work fine on linux, openbsd and freebsd */
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);
if(opt_io) {
iofd = (!strcmp(opt_io, "-")) ?
STDOUT_FILENO :
open(opt_io, O_WRONLY | O_CREAT, 0666);
if(iofd < 0) {
fprintf(stderr, "Error opening %s:%s\n",
opt_io, strerror(errno));
}
}
}
}
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, charsize);
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(void) {
struct winsize w;
w.ws_row = term.row;
w.ws_col = term.col;
w.ws_xpixel = xw.tw;
w.ws_ypixel = xw.th;
if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0)
fprintf(stderr, "Couldn't set window size: %s\n", SERRNO);
}
int
tattrset(int attr) {
int i, j;
for(i = 0; i < term.row-1; i++) {
for(j = 0; j < term.col-1; j++) {
if(term.line[i][j].mode & attr)
return 1;
}
}
return 0;
}
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
tsetdirtattr(int attr) {
int i, j;
for(i = 0; i < term.row-1; i++) {
for(j = 0; j < term.col-1; j++) {
if(term.line[i][j].mode & attr) {
tsetdirt(i, i);
break;
}
}
}
}
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) {
uint 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 = tabspaces; i < term.col; i += tabspaces)
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);
tmoveto(0, 0);
tcursor(CURSOR_SAVE);
}
void
tnew(int col, int row) {
memset(&term, 0, sizeof(Term));
tresize(col, row);
term.numlock = 1;
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.ob.x == -1)
return;
if(BETWEEN(sel.ob.y, orig, term.bot) || BETWEEN(sel.oe.y, orig, term.bot)) {
if((sel.ob.y += n) > term.bot || (sel.oe.y += n) < term.top) {
selclear(NULL);
return;
}
if(sel.type == SEL_RECTANGULAR) {
if(sel.ob.y < term.top)
sel.ob.y = term.top;
if(sel.oe.y > term.bot)
sel.oe.y = term.bot;
} else {
if(sel.ob.y < term.top) {
sel.ob.y = term.top;
sel.ob.x = 0;
}
if(sel.oe.y > term.bot) {
sel.oe.y = term.bot;
sel.oe.x = term.col;
}
}
selsort();
}
}
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) {
char *p = csiescseq.buf, *np;
long int v;
csiescseq.narg = 0;
if(*p == '?') {
csiescseq.priv = 1;
p++;
}
csiescseq.buf[csiescseq.len] = '\0';
while(p < csiescseq.buf+csiescseq.len) {
np = NULL;
v = strtol(p, &np, 10);
if(np == p)
v = 0;
if(v == LONG_MAX || v == LONG_MIN)
v = -1;
csiescseq.arg[csiescseq.narg++] = v;
p = np;
if(*p != ';' || csiescseq.narg == ESC_ARG_SIZ)
break;
p++;
}
csiescseq.mode = *p;
}
/* for absolute user moves, when decom is set */
void
tmoveato(int x, int y) {
tmoveto(x, y + ((term.c.state & CURSOR_ORIGIN) ? term.top: 0));
}
void
tmoveto(int x, int y) {
int miny, maxy;
if(term.c.state & CURSOR_ORIGIN) {
miny = term.top;
maxy = term.bot;
} else {
miny = 0;
maxy = term.row - 1;
}
LIMIT(x, 0, term.col-1);
LIMIT(y, miny, maxy);
term.c.state &= ~CURSOR_WRAPNEXT;
term.c.x = x;
term.c.y = y;
}
void
tsetchar(char *c, Glyph *attr, int x, int y) {
static char *vt100_0[62] = { /* 0x41 - 0x7e */
"↑", "↓", "→", "←", "█", "▚", "☃", /* A - G */
0, 0, 0, 0, 0, 0, 0, 0, /* H - O */
0, 0, 0, 0, 0, 0, 0, 0, /* P - W */
0, 0, 0, 0, 0, 0, 0, " ", /* X - _ */
"◆", "▒", "␉", "␌", "␍", "␊", "°", "±", /* ` - g */
"␤", "␋", "┘", "┐", "┌", "└", "┼", "⎺", /* h - o */
"⎻", "─", "⎼", "⎽", "├", "┤", "┴", "┬", /* p - w */
"│", "≤", "≥", "π", "≠", "£", "·", /* x - ~ */
};
/*
* The table is proudly stolen from rxvt.
*/
if(attr->mode & ATTR_GFX) {
if(c[0] >= 0x41 && c[0] <= 0x7e
&& vt100_0[c[0] - 0x41]) {
c = vt100_0[c[0] - 0x41];
}
}
term.dirty[y] = 1;
term.line[y][x] = *attr;
memcpy(term.line[y][x].c, c, UTF_SIZ);
}
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++) {
if(selected(x, y))
selclear(NULL);
term.line[y][x] = term.c.attr;
memcpy(term.line[y][x].c, " ", 2);
}
}
}
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 | ATTR_ITALIC \
| ATTR_BLINK);
term.c.attr.fg = defaultfg;
term.c.attr.bg = defaultbg;
break;
case 1:
term.c.attr.mode |= ATTR_BOLD;
break;
case 3:
term.c.attr.mode |= ATTR_ITALIC;
break;
case 4:
term.c.attr.mode |= ATTR_UNDERLINE;
break;
case 5: /* slow blink */
case 6: /* rapid blink */
term.c.attr.mode |= ATTR_BLINK;
break;
case 7:
term.c.attr.mode |= ATTR_REVERSE;
break;
case 21:
case 22:
term.c.attr.mode &= ~ATTR_BOLD;
break;
case 23:
term.c.attr.mode &= ~ATTR_ITALIC;
break;
case 24:
term.c.attr.mode &= ~ATTR_UNDERLINE;
break;
case 25:
case 26:
term.c.attr.mode &= ~ATTR_BLINK;
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(38): 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(48): 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.bg = attr[i] - 100 + 8;
} else {
fprintf(stderr,
"erresc(default): 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;
}
#define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
void
tsetmode(bool priv, bool set, int *args, int narg) {
int *lim, mode;
bool alt;
for(lim = args + narg; args < lim; ++args) {
if(priv) {
switch(*args) {
break;
case 1: /* DECCKM -- Cursor key */
MODBIT(term.mode, set, MODE_APPCURSOR);
break;
case 5: /* DECSCNM -- Reverse video */
mode = term.mode;
MODBIT(term.mode, set, MODE_REVERSE);
if(mode != term.mode)
redraw(REDRAW_TIMEOUT);
break;
case 6: /* DECOM -- Origin */
MODBIT(term.c.state, set, CURSOR_ORIGIN);
tmoveato(0, 0);
break;
case 7: /* DECAWM -- Auto wrap */
MODBIT(term.mode, set, MODE_WRAP);
break;
case 0: /* Error (IGNORED) */
case 2: /* DECANM -- ANSI/VT52 (IGNORED) */
case 3: /* DECCOLM -- Column (IGNORED) */
case 4: /* DECSCLM -- Scroll (IGNORED) */
case 8: /* DECARM -- Auto repeat (IGNORED) */
case 18: /* DECPFF -- Printer feed (IGNORED) */
case 19: /* DECPEX -- Printer extent (IGNORED) */
case 42: /* DECNRCM -- National characters (IGNORED) */
case 12: /* att610 -- Start blinking cursor (IGNORED) */
break;
case 25: /* DECTCEM -- Text Cursor Enable Mode */
MODBIT(term.mode, !set, MODE_HIDE);
break;
case 9: /* X10 mouse compatibility mode */
xsetpointermotion(0);
MODBIT(term.mode, 0, MODE_MOUSE);
MODBIT(term.mode, set, MODE_MOUSEX10);
break;
case 1000: /* 1000: report button press */
xsetpointermotion(0);
MODBIT(term.mode, 0, MODE_MOUSE);
MODBIT(term.mode, set, MODE_MOUSEBTN);
break;
case 1002: /* 1002: report motion on button press */
xsetpointermotion(0);
MODBIT(term.mode, 0, MODE_MOUSE);
MODBIT(term.mode, set, MODE_MOUSEMOTION);
break;
case 1003: /* 1003: enable all mouse motions */
xsetpointermotion(set);
MODBIT(term.mode, 0, MODE_MOUSE);
MODBIT(term.mode, set, MODE_MOUSEMANY);
break;
case 1004: /* 1004: send focus events to tty */
MODBIT(term.mode, set, MODE_FOCUS);
break;
case 1006: /* 1006: extended reporting mode */
MODBIT(term.mode, set, MODE_MOUSESGR);
break;
case 1034:
MODBIT(term.mode, set, MODE_8BIT);
break;
case 1049: /* = 1047 and 1048 */
case 47:
case 1047:
if (!allowaltscreen)
break;
alt = IS_SET(MODE_ALTSCREEN);
if(alt) {
tclearregion(0, 0, term.col-1,
term.row-1);
}
if(set ^ alt) /* set is always 1 or 0 */
tswapscreen();
if(*args != 1049)
break;
/* FALLTRU */
case 1048:
tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
break;
/* Not implemented mouse modes. See comments there. */
case 1001: /* mouse highlight mode; can hang the
terminal by design when implemented. */
case 1005: /* UTF-8 mouse mode; will confuse
applications not supporting UTF-8
and luit. */
case 1015: /* urxvt mangled mouse mode; incompatible
and can be mistaken for other control
codes. */
default:
fprintf(stderr,
"erresc: unknown private set/reset mode %d\n",
*args);
break;
}
} else {
switch(*args) {
case 0: /* Error (IGNORED) */
break;
case 2: /* KAM -- keyboard action */
MODBIT(term.mode, set, MODE_KBDLOCK);
break;
case 4: /* IRM -- Insertion-replacement */
MODBIT(term.mode, set, MODE_INSERT);
break;
case 12: /* SRM -- Send/Receive */
MODBIT(term.mode, !set, MODE_ECHO);
break;
case 20: /* LNM -- Linefeed/new line */
MODBIT(term.mode, set, MODE_CRLF);
break;
default:
fprintf(stderr,
"erresc: unknown set/reset mode %d\n",
*args);
break;
}
}
}
}
void
csihandle(void) {
switch(csiescseq.mode) {
default:
unknown:
fprintf(stderr, "erresc: unknown csi ");
csidump();
/* die(""); */
break;
case '@': /* ICH -- Insert <n> blank char */
DEFAULT(csiescseq.arg[0], 1);
tinsertblank(csiescseq.arg[0]);
break;
case 'A': /* CUU -- Cursor <n> Up */
DEFAULT(csiescseq.arg[0], 1);
tmoveto(term.c.x, term.c.y-csiescseq.arg[0]);
break;
case 'B': /* CUD -- Cursor <n> Down */
case 'e': /* VPR --Cursor <n> Down */
DEFAULT(csiescseq.arg[0], 1);
tmoveto(term.c.x, term.c.y+csiescseq.arg[0]);
break;
case 'c': /* DA -- Device Attributes */
if(csiescseq.arg[0] == 0)
ttywrite(VT102ID, sizeof(VT102ID) - 1);
break;
case 'C': /* CUF -- Cursor <n> Forward */
case 'a': /* HPR -- Cursor <n> Forward */
DEFAULT(csiescseq.arg[0], 1);
tmoveto(term.c.x+csiescseq.arg[0], term.c.y);
break;
case 'D': /* CUB -- Cursor <n> Backward */
DEFAULT(csiescseq.arg[0], 1);
tmoveto(term.c.x-csiescseq.arg[0], term.c.y);
break;
case 'E': /* CNL -- Cursor <n> Down and first col */
DEFAULT(csiescseq.arg[0], 1);
tmoveto(0, term.c.y+csiescseq.arg[0]);
break;
case 'F': /* CPL -- Cursor <n> Up and first col */
DEFAULT(csiescseq.arg[0], 1);
tmoveto(0, term.c.y-csiescseq.arg[0]);
break;
case 'g': /* TBC -- Tabulation clear */
switch(csiescseq.arg[0]) {
case 0: /* clear current tab stop */
term.tabs[term.c.x] = 0;
break;
case 3: /* clear all the tabs */
memset(term.tabs, 0, term.col * sizeof(*term.tabs));
break;
default:
goto unknown;
}
break;
case 'G': /* CHA -- Move to <col> */
case '`': /* HPA */
DEFAULT(csiescseq.arg[0], 1);
tmoveto(csiescseq.arg[0]-1, term.c.y);
break;
case 'H': /* CUP -- Move to <row> <col> */
case 'f': /* HVP */
DEFAULT(csiescseq.arg[0], 1);
DEFAULT(csiescseq.arg[1], 1);
tmoveato(csiescseq.arg[1]-1, csiescseq.arg[0]-1);
break;
case 'I': /* CHT -- Cursor Forward Tabulation <n> tab stops */
DEFAULT(csiescseq.arg[0], 1);
while(csiescseq.arg[0]--)
tputtab(1);
break;
case 'J': /* ED -- Clear screen */
selclear(NULL);
switch(csiescseq.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(csiescseq.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(csiescseq.arg[0], 1);
tscrollup(term.top, csiescseq.arg[0]);
break;
case 'T': /* SD -- Scroll <n> line down */
DEFAULT(csiescseq.arg[0], 1);
tscrolldown(term.top, csiescseq.arg[0]);
break;
case 'L': /* IL -- Insert <n> blank lines */
DEFAULT(csiescseq.arg[0], 1);
tinsertblankline(csiescseq.arg[0]);
break;
case 'l': /* RM -- Reset Mode */
tsetmode(csiescseq.priv, 0, csiescseq.arg, csiescseq.narg);
break;
case 'M': /* DL -- Delete <n> lines */
DEFAULT(csiescseq.arg[0], 1);
tdeleteline(csiescseq.arg[0]);
break;
case 'X': /* ECH -- Erase <n> char */
DEFAULT(csiescseq.arg[0], 1);
tclearregion(term.c.x, term.c.y,
term.c.x + csiescseq.arg[0] - 1, term.c.y);
break;
case 'P': /* DCH -- Delete <n> char */
DEFAULT(csiescseq.arg[0], 1);
tdeletechar(csiescseq.arg[0]);
break;
case 'Z': /* CBT -- Cursor Backward Tabulation <n> tab stops */
DEFAULT(csiescseq.arg[0], 1);
while(csiescseq.arg[0]--)
tputtab(0);
break;
case 'd': /* VPA -- Move to <row> */
DEFAULT(csiescseq.arg[0], 1);
tmoveato(term.c.x, csiescseq.arg[0]-1);
break;
case 'h': /* SM -- Set terminal mode */
tsetmode(csiescseq.priv, 1, csiescseq.arg, csiescseq.narg);
break;
case 'm': /* SGR -- Terminal attribute (color) */
tsetattr(csiescseq.arg, csiescseq.narg);
break;
case 'r': /* DECSTBM -- Set Scrolling Region */
if(csiescseq.priv) {
goto unknown;
} else {
DEFAULT(csiescseq.arg[0], 1);
DEFAULT(csiescseq.arg[1], term.row);
tsetscroll(csiescseq.arg[0]-1, csiescseq.arg[1]-1);
tmoveato(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;
uint c;
printf("ESC[");
for(i = 0; i < csiescseq.len; i++) {
c = csiescseq.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(&csiescseq, 0, sizeof(csiescseq));
}
void
strhandle(void) {
char *p = NULL;
int i, j, narg;
strparse();
narg = strescseq.narg;
switch(strescseq.type) {
case ']': /* OSC -- Operating System Command */
switch(i = atoi(strescseq.args[0])) {
case 0:
case 1:
case 2:
if(narg > 1)
xsettitle(strescseq.args[1]);
break;
case 4: /* color set */
if(narg < 3)
break;
p = strescseq.args[2];
/* fall through */
case 104: /* color reset, here p = NULL */
j = (narg > 1) ? atoi(strescseq.args[1]) : -1;
if (!xsetcolorname(j, p)) {
fprintf(stderr, "erresc: invalid color %s\n", p);
} else {
/*
* TODO if defaultbg color is changed, borders
* are dirty
*/
redraw(0);
}
break;
default:
fprintf(stderr, "erresc: unknown str ");
strdump();
break;
}
break;
case 'k': /* old title set compatibility */
xsettitle(strescseq.args[0]);
break;
case 'P': /* DSC -- Device Control String */
case '_': /* APC -- Application Program Command */
case '^': /* PM -- Privacy Message */
default:
fprintf(stderr, "erresc: unknown str ");
strdump();
/* die(""); */
break;
}
}
void
strparse(void) {
char *p = strescseq.buf;
strescseq.narg = 0;
strescseq.buf[strescseq.len] = '\0';
while(p && strescseq.narg < STR_ARG_SIZ)
strescseq.args[strescseq.narg++] = strsep(&p, ";");
}
void
strdump(void) {
int i;
uint c;
printf("ESC%c", strescseq.type);
for(i = 0; i < strescseq.len; i++) {
c = strescseq.buf[i] & 0xff;
if(c == '\0') {
return;
} else 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);
}
}
printf("ESC\\\n");
}
void
strreset(void) {
memset(&strescseq, 0, sizeof(strescseq));
}
void
tputtab(bool forward) {
uint x = term.c.x;
if(forward) {
if(x == term.col)
return;
for(++x; x < term.col && !term.tabs[x]; ++x)
/* nothing */ ;
} else {
if(x == 0)
return;
for(--x; x > 0 && !term.tabs[x]; --x)
/* nothing */ ;
}
tmoveto(x, term.c.y);
}
void
techo(char *buf, int len) {
for(; len > 0; buf++, len--) {
char c = *buf;
if(c == '\033') { /* escape */
tputc("^", 1);
tputc("[", 1);
} else if(c < '\x20') { /* control code */
if(c != '\n' && c != '\r' && c != '\t') {
c |= '\x40';
tputc("^", 1);
}
tputc(&c, 1);
} else {
break;
}
}
if(len)
tputc(buf, len);
}
void
tputc(char *c, int len) {
uchar ascii = *c;
bool control = ascii < '\x20' || ascii == 0177;
if(iofd != -1) {
if(xwrite(iofd, c, len) < 0) {
fprintf(stderr, "Error writing in %s:%s\n",
opt_io, strerror(errno));
close(iofd);
iofd = -1;
}
}
/*
* STR sequences must be checked before anything else
* because it can use some control codes as part of the sequence.
*/
if(term.esc & ESC_STR) {
switch(ascii) {
case '\033':
term.esc = ESC_START | ESC_STR_END;
break;
case '\a': /* backwards compatibility to xterm */
term.esc = 0;
strhandle();
break;
default:
if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
memmove(&strescseq.buf[strescseq.len], c, len);
strescseq.len += len;
} else {
/*
* Here is a bug in terminals. If the user never sends
* some code to stop the str or esc command, then st
* will stop responding. But this is better than
* silently failing with unknown characters. At least
* then users will report back.
*
* In the case users ever get fixed, here is the code:
*/
/*
* term.esc = 0;
* strhandle();
*/
}
}
return;
}
/*
* Actions of control codes must be performed as soon they arrive
* because they can be embedded inside a control sequence, and
* they must not cause conflicts with sequences.
*/
if(control) {
switch(ascii) {
case '\t': /* HT */
tputtab(1);
return;
case '\b': /* BS */
tmoveto(term.c.x-1, term.c.y);
return;
case '\r': /* CR */
tmoveto(0, term.c.y);
return;
case '\f': /* LF */
case '\v': /* VT */
case '\n': /* LF */
/* go to first col if the mode is set */
tnewline(IS_SET(MODE_CRLF));
return;
case '\a': /* BEL */
if(!(xw.state & WIN_FOCUSED))
xseturgency(1);
return;
case '\033': /* ESC */
csireset();
term.esc = ESC_START;
return;
case '\016': /* SO */
case '\017': /* SI */
/*
* Different charsets are hard to handle. Applications
* should use the right alt charset escapes for the
* only reason they still exist: line drawing. The
* rest is incompatible history st should not support.
*/
return;
case '\032': /* SUB */
case '\030': /* CAN */
csireset();
return;
case '\005': /* ENQ (IGNORED) */
case '\000': /* NUL (IGNORED) */
case '\021': /* XON (IGNORED) */
case '\023': /* XOFF (IGNORED) */
case 0177: /* DEL (IGNORED) */
return;
}
} else if(term.esc & ESC_START) {
if(term.esc & ESC_CSI) {
csiescseq.buf[csiescseq.len++] = ascii;
if(BETWEEN(ascii, 0x40, 0x7E)
|| csiescseq.len >= \
sizeof(csiescseq.buf)-1) {
term.esc = 0;
csiparse();
csihandle();
}
} else if(term.esc & ESC_STR_END) {
term.esc = 0;
if(ascii == '\\')
strhandle();
} else if(term.esc & ESC_ALTCHARSET) {
switch(ascii) {
case '0': /* Line drawing set */
term.c.attr.mode |= ATTR_GFX;
break;
case 'B': /* USASCII */
term.c.attr.mode &= ~ATTR_GFX;
break;
case 'A': /* UK (IGNORED) */
case '<': /* multinational charset (IGNORED) */
case '5': /* Finnish (IGNORED) */
case 'C': /* Finnish (IGNORED) */
case 'K': /* German (IGNORED) */
break;
default:
fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
}
term.esc = 0;
} else if(term.esc & ESC_TEST) {
if(ascii == '8') { /* DEC screen alignment test. */
char E[UTF_SIZ] = "E";
int x, y;
for(x = 0; x < term.col; ++x) {
for(y = 0; y < term.row; ++y)
tsetchar(E, &term.c.attr, x, y);
}
}
term.esc = 0;
} else {
switch(ascii) {
case '[':
term.esc |= ESC_CSI;
break;
case '#':
term.esc |= ESC_TEST;
break;
case 'P': /* DCS -- Device Control String */
case '_': /* APC -- Application Program Command */
case '^': /* PM -- Privacy Message */
case ']': /* OSC -- Operating System Command */
case 'k': /* old title set compatibility */
strreset();
strescseq.type = ascii;
term.esc |= ESC_STR;
break;
case '(': /* set primary charset G0 */
term.esc |= ESC_ALTCHARSET;
break;
case ')': /* set secondary charset G1 (IGNORED) */
case '*': /* set tertiary charset G2 (IGNORED) */
case '+': /* set quaternary charset G3 (IGNORED) */
term.esc = 0;
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 'H': /* HTS -- Horizontal tab stop */
term.tabs[term.c.x] = 1;
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 'Z': /* DECID -- Identify Terminal */
ttywrite(VT102ID, sizeof(VT102ID) - 1);
term.esc = 0;
break;
case 'c': /* RIS -- Reset to inital state */
treset();
term.esc = 0;
xresettitle();
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;
case '\\': /* ST -- Stop */
term.esc = 0;
break;
default:
fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
(uchar) ascii, isprint(ascii)? ascii:'.');
term.esc = 0;
}
}
/*
* All characters which form part of a sequence are not
* printed
*/
return;
}
/*
* Display control codes only if we are in graphic mode
*/
if(control && !(term.c.attr.mode & ATTR_GFX))
return;
if(sel.ob.x != -1 && BETWEEN(term.c.y, sel.ob.y, sel.oe.y))
selclear(NULL);
if(IS_SET(MODE_WRAP) && (term.c.state & CURSOR_WRAPNEXT)) {
term.line[term.c.y][term.c.x].mode |= ATTR_WRAP;
tnewline(1);
}
if(IS_SET(MODE_INSERT) && term.c.x+1 < term.col) {
memmove(&term.line[term.c.y][term.c.x+1],
&term.line[term.c.y][term.c.x],
(term.col - term.c.x - 1) * sizeof(Glyph));
}
tsetchar(c, &term.c.attr, term.c.x, term.c.y);
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;
int minrow = MIN(row, term.row);
int mincol = MIN(col, term.col);
int slide = term.c.y - row + 1;
bool *bp;
Line *orig;
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 = xrealloc(term.line, row * sizeof(Line));
term.alt = xrealloc(term.alt, row * sizeof(Line));
term.dirty = xrealloc(term.dirty, row * sizeof(*term.dirty));
term.tabs = xrealloc(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] = xrealloc(term.line[i], col * sizeof(Glyph));
term.alt[i] = xrealloc(term.alt[i], col * sizeof(Glyph));
}
/* allocate any new rows */
for(/* i == minrow */; i < row; i++) {
term.dirty[i] = 1;
term.line[i] = xcalloc(col, sizeof(Glyph));
term.alt [i] = xcalloc(col, sizeof(Glyph));
}
if(col > term.col) {
bp = term.tabs + term.col;
memset(bp, 0, sizeof(*term.tabs) * (col - term.col));
while(--bp > term.tabs && !*bp)
/* nothing */ ;
for(bp += tabspaces; bp < term.tabs + col; bp += tabspaces)
*bp = 1;
}
/* update terminal size */
term.col = col;
term.row = row;
/* reset scrolling region */
tsetscroll(0, row-1);
/* make use of the LIMIT in tmoveto */
tmoveto(term.c.x, term.c.y);
/* Clearing both screens */
orig = term.line;
do {
if(mincol < col && 0 < minrow) {
tclearregion(mincol, 0, col - 1, minrow - 1);
}
if(0 < col && minrow < row) {
tclearregion(0, minrow, col - 1, row - 1);
}
tswapscreen();
} while(orig != term.line);
return (slide > 0);
}
void
xresize(int col, int row) {
xw.tw = MAX(1, col * xw.cw);
xw.th = MAX(1, row * xw.ch);
XFreePixmap(xw.dpy, xw.buf);
xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
DefaultDepth(xw.dpy, xw.scr));
XftDrawChange(xw.draw, xw.buf);
xclear(0, 0, xw.w, xw.h);
}
static inline ushort
sixd_to_16bit(int x) {
return x == 0 ? 0 : 0x3737 + 0x2828 * x;
}
void
xloadcols(void) {
int i, r, g, b;
XRenderColor color = { .alpha = 0xffff };
/* load colors [0-15] colors and [256-LEN(colorname)[ (config.h) */
for(i = 0; i < LEN(colorname); i++) {
if(!colorname[i])
continue;
if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, colorname[i], &dc.col[i])) {
die("Could not allocate color '%s'\n", colorname[i]);
}
}
/* 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 = sixd_to_16bit(r);
color.green = sixd_to_16bit(g);
color.blue = sixd_to_16bit(b);
if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &dc.col[i])) {
die("Could not allocate color %d\n", i);
}
i++;
}
}
}
for(r = 0; r < 24; r++, i++) {
color.red = color.green = color.blue = 0x0808 + 0x0a0a * r;
if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color,
&dc.col[i])) {
die("Could not allocate color %d\n", i);
}
}
}
int
xsetcolorname(int x, const char *name) {
XRenderColor color = { .alpha = 0xffff };
Colour colour;
if (x < 0 || x > LEN(colorname))
return -1;
if(!name) {
if(16 <= x && x < 16 + 216) {
int r = (x - 16) / 36, g = ((x - 16) % 36) / 6, b = (x - 16) % 6;
color.red = sixd_to_16bit(r);
color.green = sixd_to_16bit(g);
color.blue = sixd_to_16bit(b);
if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
return 0; /* something went wrong */
dc.col[x] = colour;
return 1;
} else if (16 + 216 <= x && x < 256) {
color.red = color.green = color.blue = 0x0808 + 0x0a0a * (x - (16 + 216));
if(!XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &color, &colour))
return 0; /* something went wrong */
dc.col[x] = colour;
return 1;
} else {
name = colorname[x];
}
}
if(!XftColorAllocName(xw.dpy, xw.vis, xw.cmap, name, &colour))
return 0;
dc.col[x] = colour;
return 1;
}
void
xtermclear(int col1, int row1, int col2, int row2) {
XftDrawRect(xw.draw,
&dc.col[IS_SET(MODE_REVERSE) ? defaultfg : defaultbg],
borderpx + col1 * xw.cw,
borderpx + row1 * xw.ch,
(col2-col1+1) * xw.cw,
(row2-row1+1) * xw.ch);
}
/*
* Absolute coordinates.
*/
void
xclear(int x1, int y1, int x2, int y2) {
XftDrawRect(xw.draw,
&dc.col[IS_SET(MODE_REVERSE)? defaultfg : defaultbg],
x1, y1, x2-x1, y2-y1);
}
void
xhints(void) {
XClassHint class = {opt_class ? opt_class : termname, termname};
XWMHints wm = {.flags = InputHint, .input = 1};
XSizeHints *sizeh = NULL;
sizeh = XAllocSizeHints();
if(xw.isfixed == False) {
sizeh->flags = PSize | PResizeInc | PBaseSize;
sizeh->height = xw.h;
sizeh->width = xw.w;
sizeh->height_inc = xw.ch;
sizeh->width_inc = xw.cw;
sizeh->base_height = 2 * borderpx;
sizeh->base_width = 2 * borderpx;
} else {
sizeh->flags = PMaxSize | PMinSize;
sizeh->min_width = sizeh->max_width = xw.fw;
sizeh->min_height = sizeh->max_height = xw.fh;
}
XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm, &class);
XFree(sizeh);
}
int
xloadfont(Font *f, FcPattern *pattern) {
FcPattern *match;
FcResult result;
match = FcFontMatch(NULL, pattern, &result);
if(!match)
return 1;
if(!(f->match = XftFontOpenPattern(xw.dpy, match))) {
FcPatternDestroy(match);
return 1;
}
f->set = NULL;
f->pattern = FcPatternDuplicate(pattern);
f->ascent = f->match->ascent;
f->descent = f->match->descent;
f->lbearing = 0;
f->rbearing = f->match->max_advance_width;
f->height = f->ascent + f->descent;
f->width = f->lbearing + f->rbearing;
return 0;
}
void
xloadfonts(char *fontstr, int fontsize) {
FcPattern *pattern;
FcResult result;
double fontval;
if(fontstr[0] == '-') {
pattern = XftXlfdParse(fontstr, False, False);
} else {
pattern = FcNameParse((FcChar8 *)fontstr);
}
if(!pattern)
die("st: can't open font %s\n", fontstr);
if(fontsize > 0) {
FcPatternDel(pattern, FC_PIXEL_SIZE);
FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
usedfontsize = fontsize;
} else {
result = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
if(result == FcResultMatch) {
usedfontsize = (int)fontval;
} else {
/*
* Default font size is 12, if none given. This is to
* have a known usedfontsize value.
*/
FcPatternAddDouble(pattern, FC_PIXEL_SIZE, 12);
usedfontsize = 12;
}
}
FcConfigSubstitute(0, pattern, FcMatchPattern);
FcDefaultSubstitute(pattern);
if(xloadfont(&dc.font, pattern))
die("st: can't open font %s\n", fontstr);
/* Setting character width and height. */
xw.cw = dc.font.width;
xw.ch = dc.font.height;
FcPatternDel(pattern, FC_SLANT);
FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ITALIC);
if(xloadfont(&dc.ifont, pattern))
die("st: can't open font %s\n", fontstr);
FcPatternDel(pattern, FC_WEIGHT);
FcPatternAddInteger(pattern, FC_WEIGHT, FC_WEIGHT_BOLD);
if(xloadfont(&dc.ibfont, pattern))
die("st: can't open font %s\n", fontstr);
FcPatternDel(pattern, FC_SLANT);
FcPatternAddInteger(pattern, FC_SLANT, FC_SLANT_ROMAN);
if(xloadfont(&dc.bfont, pattern))
die("st: can't open font %s\n", fontstr);
FcPatternDestroy(pattern);
}
int
xloadfontset(Font *f) {
FcResult result;
if(!(f->set = FcFontSort(0, f->pattern, FcTrue, 0, &result)))
return 1;
return 0;
}
void
xunloadfont(Font *f) {
XftFontClose(xw.dpy, f->match);
FcPatternDestroy(f->pattern);
if(f->set)
FcFontSetDestroy(f->set);
}
void
xunloadfonts(void) {
int i, ip;
/*
* Free the loaded fonts in the font cache. This is done backwards
* from the frccur.
*/
for(i = 0, ip = frccur; i < frclen; i++, ip--) {
if(ip < 0)
ip = LEN(frc) - 1;
XftFontClose(xw.dpy, frc[ip].font);
}
frccur = -1;
frclen = 0;
xunloadfont(&dc.font);
xunloadfont(&dc.bfont);
xunloadfont(&dc.ifont);
xunloadfont(&dc.ibfont);
}
void
xzoom(const Arg *arg) {
xunloadfonts();
xloadfonts(usedfont, usedfontsize + arg->i);
cresize(0, 0);
redraw(0);
}
void
xinit(void) {
XGCValues gcvalues;
Cursor cursor;
Window parent;
int sw, sh;
if(!(xw.dpy = XOpenDisplay(NULL)))
die("Can't open display\n");
xw.scr = XDefaultScreen(xw.dpy);
xw.vis = XDefaultVisual(xw.dpy, xw.scr);
/* font */
if(!FcInit())
die("Could not init fontconfig.\n");
usedfont = (opt_font == NULL)? font : opt_font;
xloadfonts(usedfont, 0);
/* colors */
xw.cmap = XDefaultColormap(xw.dpy, xw.scr);
xloadcols();
/* adjust fixed window geometry */
if(xw.isfixed) {
sw = DisplayWidth(xw.dpy, xw.scr);
sh = DisplayHeight(xw.dpy, xw.scr);
if(xw.fx < 0)
xw.fx = sw + xw.fx - xw.fw - 1;
if(xw.fy < 0)
xw.fy = sh + xw.fy - xw.fh - 1;
xw.h = xw.fh;
xw.w = xw.fw;
} else {
/* window - default size */
xw.h = 2 * borderpx + term.row * xw.ch;
xw.w = 2 * borderpx + term.col * xw.cw;
xw.fx = 0;
xw.fy = 0;
}
/* Events */
xw.attrs.background_pixel = dc.col[defaultbg].pixel;
xw.attrs.border_pixel = dc.col[defaultbg].pixel;
xw.attrs.bit_gravity = NorthWestGravity;
xw.attrs.event_mask = FocusChangeMask | KeyPressMask
| ExposureMask | VisibilityChangeMask | StructureNotifyMask
| ButtonMotionMask | ButtonPressMask | ButtonReleaseMask;
xw.attrs.colormap = xw.cmap;
parent = opt_embed ? strtol(opt_embed, NULL, 0) : \
XRootWindow(xw.dpy, xw.scr);
xw.win = XCreateWindow(xw.dpy, parent, xw.fx, xw.fy,
xw.w, xw.h, 0, XDefaultDepth(xw.dpy, xw.scr), InputOutput,
xw.vis, CWBackPixel | CWBorderPixel | CWBitGravity
| CWEventMask | CWColormap, &xw.attrs);
memset(&gcvalues, 0, sizeof(gcvalues));
gcvalues.graphics_exposures = False;
dc.gc = XCreateGC(xw.dpy, parent, GCGraphicsExposures,
&gcvalues);
xw.buf = XCreatePixmap(xw.dpy, xw.win, xw.w, xw.h,
DefaultDepth(xw.dpy, xw.scr));
XSetForeground(xw.dpy, dc.gc, dc.col[defaultbg].pixel);
XFillRectangle(xw.dpy, xw.buf, dc.gc, 0, 0, xw.w, xw.h);
/* Xft rendering context */
xw.draw = XftDrawCreate(xw.dpy, xw.buf, xw.vis, xw.cmap);
/* input methods */
if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
XSetLocaleModifiers("@im=local");
if((xw.xim = XOpenIM(xw.dpy, NULL, NULL, NULL)) == NULL) {
XSetLocaleModifiers("@im=");
if((xw.xim = XOpenIM(xw.dpy,
NULL, NULL, NULL)) == NULL) {
die("XOpenIM failed. Could not open input"
" device.\n");
}
}
}
xw.xic = XCreateIC(xw.xim, XNInputStyle, XIMPreeditNothing
| XIMStatusNothing, XNClientWindow, xw.win,
XNFocusWindow, xw.win, NULL);
if(xw.xic == NULL)
die("XCreateIC failed. Could not obtain input method.\n");
/* 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);
xw.wmdeletewin = XInternAtom(xw.dpy, "WM_DELETE_WINDOW", False);
XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
xresettitle();
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 winx = borderpx + x * xw.cw, winy = borderpx + y * xw.ch,
width = charlen * xw.cw, xp, i;
int frp, frcflags;
int u8fl, u8fblen, u8cblen, doesexist;
char *u8c, *u8fs;
long u8char;
Font *font = &dc.font;
FcResult fcres;
FcPattern *fcpattern, *fontpattern;
FcFontSet *fcsets[] = { NULL };
FcCharSet *fccharset;
Colour *fg, *bg, *temp, revfg, revbg;
XRenderColor colfg, colbg;
Rectangle r;
frcflags = FRC_NORMAL;
if(base.mode & ATTR_ITALIC) {
if(base.fg == defaultfg)
base.fg = defaultitalic;
font = &dc.ifont;
frcflags = FRC_ITALIC;
} else if((base.mode & ATTR_ITALIC) && (base.mode & ATTR_BOLD)) {
if(base.fg == defaultfg)
base.fg = defaultitalic;
font = &dc.ibfont;
frcflags = FRC_ITALICBOLD;
} else if(base.mode & ATTR_UNDERLINE) {
if(base.fg == defaultfg)
base.fg = defaultunderline;
}
fg = &dc.col[base.fg];
bg = &dc.col[base.bg];
if(base.mode & ATTR_BOLD) {
if(BETWEEN(base.fg, 0, 7)) {
/* basic system colors */
fg = &dc.col[base.fg + 8];
} else if(BETWEEN(base.fg, 16, 195)) {
/* 256 colors */
fg = &dc.col[base.fg + 36];
} else if(BETWEEN(base.fg, 232, 251)) {
/* greyscale */
fg = &dc.col[base.fg + 4];
}
/*
* Those ranges will not be brightened:
* 8 - 15 – bright system colors
* 196 - 231 – highest 256 color cube
* 252 - 255 – brightest colors in greyscale
*/
font = &dc.bfont;
frcflags = FRC_BOLD;
}
if(IS_SET(MODE_REVERSE)) {
if(fg == &dc.col[defaultfg]) {
fg = &dc.col[defaultbg];
} else {
colfg.red = ~fg->color.red;
colfg.green = ~fg->color.green;
colfg.blue = ~fg->color.blue;
colfg.alpha = fg->color.alpha;
XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &revfg);
fg = &revfg;
}
if(bg == &dc.col[defaultbg]) {
bg = &dc.col[defaultfg];
} else {
colbg.red = ~bg->color.red;
colbg.green = ~bg->color.green;
colbg.blue = ~bg->color.blue;
colbg.alpha = bg->color.alpha;
XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &revbg);
bg = &revbg;
}
}
if(base.mode & ATTR_REVERSE) {
temp = fg;
fg = bg;
bg = temp;
}
if(base.mode & ATTR_BLINK && term.mode & MODE_BLINK)
fg = bg;
/* Intelligent cleaning up of the borders. */
if(x == 0) {
xclear(0, (y == 0)? 0 : winy, borderpx,
winy + xw.ch + ((y >= term.row-1)? xw.h : 0));
}
if(x + charlen >= term.col) {
xclear(winx + width, (y == 0)? 0 : winy, xw.w,
((y >= term.row-1)? xw.h : (winy + xw.ch)));
}
if(y == 0)
xclear(winx, 0, winx + width, borderpx);
if(y == term.row-1)
xclear(winx, winy + xw.ch, winx + width, xw.h);
/* Clean up the region we want to draw to. */
XftDrawRect(xw.draw, bg, winx, winy, width, xw.ch);
/* Set the clip region because Xft is sometimes dirty. */
r.x = 0;
r.y = 0;
r.height = xw.ch;
r.width = width;
XftDrawSetClipRectangles(xw.draw, winx, winy, &r, 1);
for(xp = winx; bytelen > 0;) {
/*
* Search for the range in the to be printed string of glyphs
* that are in the main font. Then print that range. If
* some glyph is found that is not in the font, do the
* fallback dance.
*/
u8fs = s;
u8fblen = 0;
u8fl = 0;
for(;;) {
u8c = s;
u8cblen = utf8decode(s, &u8char);
s += u8cblen;
bytelen -= u8cblen;
doesexist = XftCharIndex(xw.dpy, font->match, u8char);
if(!doesexist || bytelen <= 0) {
if(bytelen <= 0) {
if(doesexist) {
u8fl++;
u8fblen += u8cblen;
}
}
if(u8fl > 0) {
XftDrawStringUtf8(xw.draw, fg,
font->match, xp,
winy + font->ascent,
(FcChar8 *)u8fs,
u8fblen);
xp += font->width * u8fl;
}
break;
}
u8fl++;
u8fblen += u8cblen;
}
if(doesexist)
break;
frp = frccur;
/* Search the font cache. */
for(i = 0; i < frclen; i++, frp--) {
if(frp <= 0)
frp = LEN(frc) - 1;
if(frc[frp].c == u8char
&& frc[frp].flags == frcflags) {
break;
}
}
/* Nothing was found. */
if(i >= frclen) {
if(!font->set)
xloadfontset(font);
fcsets[0] = font->set;
/*
* Nothing was found in the cache. Now use
* some dozen of Fontconfig calls to get the
* font for one single character.
*/
fcpattern = FcPatternDuplicate(font->pattern);
fccharset = FcCharSetCreate();
FcCharSetAddChar(fccharset, u8char);
FcPatternAddCharSet(fcpattern, FC_CHARSET,
fccharset);
FcPatternAddBool(fcpattern, FC_SCALABLE,
FcTrue);
FcConfigSubstitute(0, fcpattern,
FcMatchPattern);
FcDefaultSubstitute(fcpattern);
fontpattern = FcFontSetMatch(0, fcsets,
FcTrue, fcpattern, &fcres);
/*
* Overwrite or create the new cache entry.
*/
frccur++;
frclen++;
if(frccur >= LEN(frc))
frccur = 0;
if(frclen > LEN(frc)) {
frclen = LEN(frc);
XftFontClose(xw.dpy, frc[frccur].font);
}
frc[frccur].font = XftFontOpenPattern(xw.dpy,
fontpattern);
frc[frccur].c = u8char;
frc[frccur].flags = frcflags;
FcPatternDestroy(fcpattern);
FcCharSetDestroy(fccharset);
frp = frccur;
}
XftDrawStringUtf8(xw.draw, fg, frc[frp].font,
xp, winy + frc[frp].font->ascent,
(FcChar8 *)u8c, u8cblen);
xp += font->width;
}
/*
XftDrawStringUtf8(xw.draw, fg, font->set, winx,
winy + font->ascent, (FcChar8 *)s, bytelen);
*/
if(base.mode & ATTR_UNDERLINE) {
XftDrawRect(xw.draw, fg, winx, winy + font->ascent + 1,
width, 1);
}
/* Reset clip to none. */
XftDrawSetClip(xw.draw, 0);
}
void
xdrawcursor(void) {
static int oldx = 0, oldy = 0;
int sl;
Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
LIMIT(oldx, 0, term.col-1);
LIMIT(oldy, 0, term.row-1);
memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
/* remove the old cursor */
sl = utf8size(term.line[oldy][oldx].c);
xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
oldy, 1, sl);
/* draw the new one */
if(!(IS_SET(MODE_HIDE))) {
if(xw.state & WIN_FOCUSED) {
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);
} else {
XftDrawRect(xw.draw, &dc.col[defaultcs],
borderpx + term.c.x * xw.cw,
borderpx + term.c.y * xw.ch,
xw.cw - 1, 1);
XftDrawRect(xw.draw, &dc.col[defaultcs],
borderpx + term.c.x * xw.cw,
borderpx + term.c.y * xw.ch,
1, xw.ch - 1);
XftDrawRect(xw.draw, &dc.col[defaultcs],
borderpx + (term.c.x + 1) * xw.cw - 1,
borderpx + term.c.y * xw.ch,
1, xw.ch - 1);
XftDrawRect(xw.draw, &dc.col[defaultcs],
borderpx + term.c.x * xw.cw,
borderpx + (term.c.y + 1) * xw.ch - 1,
xw.cw, 1);
}
oldx = term.c.x, oldy = term.c.y;
}
}
void
xsettitle(char *p) {
XTextProperty prop;
Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
&prop);
XSetWMName(xw.dpy, xw.win, &prop);
}
void
xresettitle(void) {
xsettitle(opt_title ? opt_title : "st");
}
void
redraw(int timeout) {
struct timespec tv = {0, timeout * 1000};
tfulldirt();
draw();
if(timeout > 0) {
nanosleep(&tv, NULL);
XSync(xw.dpy, False); /* necessary for a good tput flash */
}
}
void
draw(void) {
drawregion(0, 0, term.col, term.row);
XCopyArea(xw.dpy, xw.buf, xw.win, dc.gc, 0, 0, xw.w,
xw.h, 0, 0);
XSetForeground(xw.dpy, dc.gc,
dc.col[IS_SET(MODE_REVERSE)?
defaultfg : defaultbg].pixel);
}
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];
bool ena_sel = sel.ob.x != -1;
if(sel.alt ^ IS_SET(MODE_ALTSCREEN))
ena_sel = 0;
if(!(xw.state & WIN_VISIBLE))
return;
for(y = y1; y < y2; y++) {
if(!term.dirty[y])
continue;
xtermclear(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(ena_sel && selected(x, y))
new.mode ^= ATTR_REVERSE;
if(ib > 0 && (ATTRCMP(base, new)
|| ib >= DRAW_BUF_SIZ-UTF_SIZ)) {
xdraws(buf, base, ox, y, ic, ib);
ic = ib = 0;
}
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;
}
redraw(0);
}
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
xsetpointermotion(int set) {
MODBIT(xw.attrs.event_mask, set, PointerMotionMask);
XChangeWindowAttributes(xw.dpy, xw.win, CWEventMask, &xw.attrs);
}
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) {
XFocusChangeEvent *e = &ev->xfocus;
if(e->mode == NotifyGrab)
return;
if(ev->type == FocusIn) {
XSetICFocus(xw.xic);
xw.state |= WIN_FOCUSED;
xseturgency(0);
if(IS_SET(MODE_FOCUS))
ttywrite("\033[I", 3);
} else {
XUnsetICFocus(xw.xic);
xw.state &= ~WIN_FOCUSED;
if(IS_SET(MODE_FOCUS))
ttywrite("\033[O", 3);
}
}
inline bool
match(uint mask, uint state) {
state &= ~(ignoremod);
if(mask == XK_NO_MOD && state)
return false;
if(mask != XK_ANY_MOD && mask != XK_NO_MOD && !state)
return false;
if((state & mask) != state)
return false;
return true;
}
void
numlock(const Arg *dummy) {
term.numlock ^= 1;
}
char*
kmap(KeySym k, uint state) {
uint mask;
Key *kp;
int i;
/* Check for mapped keys out of X11 function keys. */
for(i = 0; i < LEN(mappedkeys); i++) {
if(mappedkeys[i] == k)
break;
}
if(i == LEN(mappedkeys)) {
if((k & 0xFFFF) < 0xFD00)
return NULL;
}
for(kp = key; kp < key + LEN(key); kp++) {
mask = kp->mask;
if(kp->k != k)
continue;
if(!match(mask, state))
continue;
if(kp->appkey > 0) {
if(!IS_SET(MODE_APPKEYPAD))
continue;
if(term.numlock && kp->appkey == 2)
continue;
} else if(kp->appkey < 0 && IS_SET(MODE_APPKEYPAD)) {
continue;
}
if((kp->appcursor < 0 && IS_SET(MODE_APPCURSOR)) ||
(kp->appcursor > 0
&& !IS_SET(MODE_APPCURSOR))) {
continue;
}
if((kp->crlf < 0 && IS_SET(MODE_CRLF)) ||
(kp->crlf > 0 && !IS_SET(MODE_CRLF))) {
continue;
}
return kp->s;
}
return NULL;
}
void
kpress(XEvent *ev) {
XKeyEvent *e = &ev->xkey;
KeySym ksym;
char xstr[31], buf[32], *customkey, *cp = buf;
int len, ret;
long c;
Status status;
Shortcut *bp;
if(IS_SET(MODE_KBDLOCK))
return;
len = XmbLookupString(xw.xic, e, xstr, sizeof(xstr), &ksym, &status);
e->state &= ~Mod2Mask;
/* 1. shortcuts */
for(bp = shortcuts; bp < shortcuts + LEN(shortcuts); bp++) {
if(ksym == bp->keysym && match(bp->mod, e->state)) {
bp->func(&(bp->arg));
return;
}
}
/* 2. custom keys from config.h */
if((customkey = kmap(ksym, e->state))) {
len = strlen(customkey);
memcpy(buf, customkey, len);
/* 3. hardcoded (overrides X lookup) */
} else {
if(len == 0)
return;
if(len == 1 && e->state & Mod1Mask) {
if(IS_SET(MODE_8BIT)) {
if(*xstr < 0177) {
c = *xstr | B7;
ret = utf8encode(&c, cp);
cp += ret;
len = 0;
}
} else {
*cp++ = '\033';
}
}
memcpy(cp, xstr, len);
len = cp - buf + len;
}
ttywrite(buf, len);
if(IS_SET(MODE_ECHO))
techo(buf, len);
}
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;
}
} else if(e->xclient.data.l[0] == xw.wmdeletewin) {
/* Send SIGHUP to shell */
kill(pid, SIGHUP);
exit(EXIT_SUCCESS);
}
}
void
cresize(int width, int height) {
int col, row;
if(width != 0)
xw.w = width;
if(height != 0)
xw.h = height;
col = (xw.w - 2 * borderpx) / xw.cw;
row = (xw.h - 2 * borderpx) / xw.ch;
tresize(col, row);
xresize(col, row);
ttyresize();
}
void
resize(XEvent *e) {
if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h)
return;
cresize(e->xconfigure.width, e->xconfigure.height);
}
void
run(void) {
XEvent ev;
fd_set rfd;
int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
gettimeofday(&lastblink, NULL);
gettimeofday(&last, NULL);
for(xev = actionfps;;) {
FD_ZERO(&rfd);
FD_SET(cmdfd, &rfd);
FD_SET(xfd, &rfd);
if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, tv) < 0) {
if(errno == EINTR)
continue;
die("select failed: %s\n", SERRNO);
}
if(FD_ISSET(cmdfd, &rfd)) {
ttyread();
if(blinktimeout) {
blinkset = tattrset(ATTR_BLINK);
if(!blinkset && term.mode & ATTR_BLINK)
term.mode &= ~(MODE_BLINK);
}
}
if(FD_ISSET(xfd, &rfd))
xev = actionfps;
gettimeofday(&now, NULL);
drawtimeout.tv_sec = 0;
drawtimeout.tv_usec = (1000/xfps) * 1000;
tv = &drawtimeout;
dodraw = 0;
if(blinktimeout && TIMEDIFF(now, lastblink) > blinktimeout) {
tsetdirtattr(ATTR_BLINK);
term.mode ^= MODE_BLINK;
gettimeofday(&lastblink, NULL);
dodraw = 1;
}
if(TIMEDIFF(now, last) \
> (xev? (1000/xfps) : (1000/actionfps))) {
dodraw = 1;
last = now;
}
if(dodraw) {
while(XPending(xw.dpy)) {
XNextEvent(xw.dpy, &ev);
if(XFilterEvent(&ev, None))
continue;
if(handler[ev.type])
(handler[ev.type])(&ev);
}
draw();
XFlush(xw.dpy);
if(xev && !FD_ISSET(xfd, &rfd))
xev--;
if(!FD_ISSET(cmdfd, &rfd) && !FD_ISSET(xfd, &rfd)) {
if(blinkset) {
if(TIMEDIFF(now, lastblink) \
> blinktimeout) {
drawtimeout.tv_usec = 1;
} else {
drawtimeout.tv_usec = (1000 * \
(blinktimeout - \
TIMEDIFF(now,
lastblink)));
}
} else {
tv = NULL;
}
}
}
}
}
void
usage(void) {
die("%s " VERSION " (c) 2010-2013 st engineers\n" \
"usage: st [-a] [-v] [-c class] [-f font] [-g geometry] [-o file]" \
" [-t title] [-w windowid] [-e command ...]\n", argv0);
}
int
main(int argc, char *argv[]) {
int bitm, xr, yr;
uint wr, hr;
char *titles;
xw.fw = xw.fh = xw.fx = xw.fy = 0;
xw.isfixed = False;
ARGBEGIN {
case 'a':
allowaltscreen = false;
break;
case 'c':
opt_class = EARGF(usage());
break;
case 'e':
/* eat all remaining arguments */
if(argc > 1) {
opt_cmd = &argv[1];
if(argv[1] != NULL && opt_title == NULL) {
titles = strdup(argv[1]);
opt_title = basename(titles);
}
}
goto run;
case 'f':
opt_font = EARGF(usage());
break;
case 'g':
bitm = XParseGeometry(EARGF(usage()), &xr, &yr, &wr, &hr);
if(bitm & XValue)
xw.fx = xr;
if(bitm & YValue)
xw.fy = yr;
if(bitm & WidthValue)
xw.fw = (int)wr;
if(bitm & HeightValue)
xw.fh = (int)hr;
if(bitm & XNegative && xw.fx == 0)
xw.fx = -1;
if(bitm & XNegative && xw.fy == 0)
xw.fy = -1;
if(xw.fh != 0 && xw.fw != 0)
xw.isfixed = True;
break;
case 'o':
opt_io = EARGF(usage());
break;
case 't':
opt_title = EARGF(usage());
break;
case 'w':
opt_embed = EARGF(usage());
break;
case 'v':
default:
usage();
} ARGEND;
run:
setlocale(LC_CTYPE, "");
XSetLocaleModifiers("");
tnew(80, 24);
xinit();
ttynew();
selinit();
if(xw.isfixed)
cresize(xw.h, xw.w);
run();
return 0;
}
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