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st/st.c
Roberto E. Vargas Caballero 53105cf74f Remove repeated initialisation of term.esc 
Once a sequence is completed term.esc must return to 0, so
instead of repeating this expression in all the cases is
better put it at the end of the block.
2014-04-27 11:30:21 +02:00

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/* 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 <stdint.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 <wchar.h>
#include "arg.h"
char *argv0;
#define Glyph Glyph_
#define Font Font_
#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_INVALID 0xFFFD
#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 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 ISCONTROLC0(c) (BETWEEN((uchar) (c), 0, 0x1f))
#define ISCONTROLC1(c) (BETWEEN((uchar) (c), 0x80, 0x9f))
#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 CEIL(x) (((x) != (int) (x)) ? (x) + 1 : (x))
#define MODBIT(x, set, bit) ((set) ? ((x) |= (bit)) : ((x) &= ~(bit)))
#define TRUECOLOR(r,g,b) (1 << 24 | (r) << 16 | (g) << 8 | (b))
#define IS_TRUECOL(x) (1 << 24 & (x))
#define TRUERED(x) (((x) & 0xff0000) >> 8)
#define TRUEGREEN(x) (((x) & 0xff00))
#define TRUEBLUE(x) (((x) & 0xff) << 8)
#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,
ATTR_WIDE = 128,
ATTR_WDUMMY = 256,
};
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_BRCKTPASTE = 524288,
MODE_PRINT = 1048576,
MODE_MOUSE = MODE_MOUSEBTN|MODE_MOUSEMOTION|MODE_MOUSEX10\
|MODE_MOUSEMANY,
};
enum charset {
CS_GRAPHIC0,
CS_GRAPHIC1,
CS_UK,
CS_USA,
CS_MULTI,
CS_GER,
CS_FIN
};
enum escape_state {
ESC_START = 1,
ESC_CSI = 2,
ESC_STR = 4, /* DCS, 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
};
typedef unsigned char uchar;
typedef unsigned int uint;
typedef unsigned long ulong;
typedef unsigned short ushort;
typedef XftDraw *Draw;
typedef XftColor Colour;
typedef Colormap Colourmap;
typedef struct {
char c[UTF_SIZ]; /* character code */
ushort mode; /* attribute flags */
uint32_t fg; /* foreground */
uint32_t 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 */
char trantbl[4]; /* charset table translation */
int charset; /* current charset */
int icharset; /* selected charset for sequence */
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, netwmname, netwmpid;
XIM xim;
XIC xic;
Draw draw;
Visual *vis;
XSetWindowAttributes attrs;
int scr;
bool isfixed; /* is fixed geometry? */
int l, t; /* left and top offset */
int gm; /* geometry mask */
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 {
uint b;
uint mask;
char *s;
} Mousekey;
typedef struct {
KeySym k;
uint mask;
char *s;
/* 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;
uint ui;
float f;
const void *v;
} Arg;
typedef struct {
uint 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 *);
static void printsel(const Arg *);
static void printscreen(const Arg *) ;
static void toggleprinter(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 tprinter(char *, size_t);
static void tdumpsel(void);
static void tdumpline(int);
static void tdump(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 tmoveato(int, int);
static void tnew(int, int);
static void tnewline(int);
static void tputtab(int);
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 bool tcontrolcode(uchar );
static int32_t tdefcolor(int *, int *, int);
static void tselcs(void);
static void tdeftran(char);
static inline bool match(uint, uint);
static void ttynew(void);
static void ttyread(void);
static void ttyresize(void);
static void ttysend(char *, size_t);
static void ttywrite(const char *, size_t);
static inline bool iscontrol(char);
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 xgeommasktogravity(int);
static int xloadfont(Font *, FcPattern *);
static void xloadfonts(char *, double);
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 *);
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 char *getsel(void);
static void selcopy(void);
static void selscroll(int, int);
static void selsnap(int, int *, int *, int);
static size_t utf8decode(char *, long *, size_t);
static long utf8decodebyte(char, size_t *);
static size_t utf8encode(long, char *, size_t);
static char utf8encodebyte(long, size_t);
static size_t utf8len(char *);
static size_t utf8validate(long *, size_t);
static ssize_t xwrite(int, const char *, size_t);
static void *xmalloc(size_t);
static void *xrealloc(void *, size_t);
static char *xstrdup(char *);
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 = STDOUT_FILENO;
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 double usedfontsize = 0;
static uchar utfbyte[UTF_SIZ + 1] = {0x80, 0, 0xC0, 0xE0, 0xF0};
static uchar utfmask[UTF_SIZ + 1] = {0xC0, 0x80, 0xE0, 0xF0, 0xF8};
static long utfmin[UTF_SIZ + 1] = { 0, 0, 0x80, 0x800, 0x10000};
static long utfmax[UTF_SIZ + 1] = {0x10FFFF, 0x7F, 0x7FF, 0xFFFF, 0x10FFFF};
/* Font Ring Cache */
enum {
FRC_NORMAL,
FRC_ITALIC,
FRC_BOLD,
FRC_ITALICBOLD
};
typedef struct {
XftFont *font;
int flags;
} Fontcache;
/* Fontcache is an array now. A new font will be appended to the array. */
static Fontcache frc[16];
static int frclen = 0;
ssize_t
xwrite(int fd, const 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;
}
char *
xstrdup(char *s) {
if((s = strdup(s)) == NULL)
die("Out of memory\n");
return s;
}
size_t
utf8decode(char *c, long *u, size_t clen) {
size_t i, j, len, type;
long udecoded;
*u = UTF_INVALID;
if(!clen)
return 0;
udecoded = utf8decodebyte(c[0], &len);
if(!BETWEEN(len, 1, UTF_SIZ))
return 1;
for(i = 1, j = 1; i < clen && j < len; ++i, ++j) {
udecoded = (udecoded << 6) | utf8decodebyte(c[i], &type);
if(type != 0)
return j;
}
if(j < len)
return 0;
*u = udecoded;
utf8validate(u, len);
return len;
}
long
utf8decodebyte(char c, size_t *i) {
for(*i = 0; *i < LEN(utfmask); ++(*i))
if(((uchar)c & utfmask[*i]) == utfbyte[*i])
return (uchar)c & ~utfmask[*i];
return 0;
}
size_t
utf8encode(long u, char *c, size_t clen) {
size_t len, i;
len = utf8validate(&u, 0);
if(clen < len)
return 0;
for(i = len - 1; i != 0; --i) {
c[i] = utf8encodebyte(u, 0);
u >>= 6;
}
c[0] = utf8encodebyte(u, len);
return len;
}
char
utf8encodebyte(long u, size_t i) {
return utfbyte[i] | (u & ~utfmask[i]);
}
size_t
utf8len(char *c) {
return utf8decode(c, &(long){0}, UTF_SIZ);
}
size_t
utf8validate(long *u, size_t i) {
if(!BETWEEN(*u, utfmin[i], utfmax[i]) || BETWEEN(*u, 0xD800, 0xDFFF))
*u = UTF_INVALID;
for(i = 1; *u > utfmax[i]; ++i)
;
return i;
}
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(term.line[*y][*x+direction].mode & ATTR_WDUMMY) {
*x += direction;
continue;
}
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 = 3;
} else {
button -= Button1;
if(button >= 3)
button += 64 - 3;
}
if(e->xbutton.type == ButtonPress) {
oldbutton = button;
ox = x;
oy = y;
} else if(e->xbutton.type == ButtonRelease) {
oldbutton = 3;
/* MODE_MOUSEX10: no button release reporting */
if(IS_SET(MODE_MOUSEX10))
return;
}
}
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",
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)) {
ttysend(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;
}
}
char *
getsel(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-1];
while(last >= gp && !(selected(last - gp, y) &&
strcmp(last->c, " ") != 0)) {
--last;
}
for(x = 0; gp <= last; x++, ++gp) {
if(!selected(x, y) || (gp->mode & ATTR_WDUMMY))
continue;
size = utf8len(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 && x > 0 && !((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;
}
return str;
}
void
selcopy(void) {
xsetsel(getsel());
}
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 getsel:
* 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';
}
if(IS_SET(MODE_BRCKTPASTE))
ttywrite("\033[200~", 6);
ttysend((char *)data, nitems * format / 8);
if(IS_SET(MODE_BRCKTPASTE))
ttywrite("\033[201~", 6);
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, strerror(errno));
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", strerror(errno));
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", strerror(errno));
close(s);
close(m);
execsh();
break;
default:
close(s);
cmdfd = m;
signal(SIGCHLD, sigchld);
if(opt_io) {
term.mode |= MODE_PRINT;
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));
}
}
break;
}
}
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 unicodep;
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", strerror(errno));
/* process every complete utf8 char */
buflen += ret;
ptr = buf;
while((charsize = utf8decode(ptr, &unicodep, buflen))) {
utf8encode(unicodep, s, UTF_SIZ);
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(xwrite(cmdfd, s, n) == -1)
die("write error on tty: %s\n", strerror(errno));
}
void
ttysend(char *s, size_t n) {
ttywrite(s, n);
if(IS_SET(MODE_ECHO))
techo(s, n);
}
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", strerror(errno));
}
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[2];
bool alt = IS_SET(MODE_ALTSCREEN);
if(mode == CURSOR_SAVE) {
c[alt] = term.c;
} else if(mode == CURSOR_LOAD) {
term.c = c[alt];
tmoveto(c[alt].x, c[alt].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;
memset(term.trantbl, sizeof(term.trantbl), CS_USA);
term.charset = 0;
tclearregion(0, 0, term.col-1, term.row-1);
tmoveto(0, 0);
tcursor(CURSOR_SAVE);
}
void
tnew(int col, int row) {
term = (Term){ .c = { .attr = { .fg = defaultfg, .bg = defaultbg } } };
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);
tsetdirt(orig, term.bot-n);
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;
}
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);
tsetdirt(orig+n, term.bot);
for(i = orig; i <= term.bot-n; i++) {
temp = term.line[i];
term.line[i] = term.line[i+n];
term.line[i+n] = temp;
}
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(BETWEEN(c[0], 0x41, 0x7e) && vt100_0[c[0] - 0x41]) {
c = vt100_0[c[0] - 0x41];
}
}
if(term.line[y][x].mode & ATTR_WIDE) {
if(x+1 < term.col) {
term.line[y][x+1].c[0] = ' ';
term.line[y][x+1].mode &= ~ATTR_WDUMMY;
}
} else if(term.line[y][x].mode & ATTR_WDUMMY) {
term.line[y][x-1].c[0] = ' ';
term.line[y][x-1].mode &= ~ATTR_WIDE;
}
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 dst, src, size;
Glyph *line;
LIMIT(n, 0, term.col - term.c.x);
dst = term.c.x;
src = term.c.x + n;
size = term.col - src;
line = term.line[term.c.y];
memmove(&line[dst], &line[src], size * sizeof(Glyph));
tclearregion(term.col-n, term.c.y, term.col-1, term.c.y);
}
void
tinsertblank(int n) {
int dst, src, size;
Glyph *line;
LIMIT(n, 0, term.col - term.c.x);
dst = term.c.x + n;
src = term.c.x;
size = term.col - dst;
line = term.line[term.c.y];
memmove(&line[dst], &line[src], size * sizeof(Glyph));
tclearregion(src, term.c.y, dst - 1, term.c.y);
}
void
tinsertblankline(int n) {
if(BETWEEN(term.c.y, term.top, term.bot))
tscrolldown(term.c.y, n);
}
void
tdeleteline(int n) {
if(BETWEEN(term.c.y, term.top, term.bot))
tscrollup(term.c.y, n);
}
int32_t
tdefcolor(int *attr, int *npar, int l) {
int32_t idx = -1;
uint r, g, b;
switch (attr[*npar + 1]) {
case 2: /* direct colour in RGB space */
if (*npar + 4 >= l) {
fprintf(stderr,
"erresc(38): Incorrect number of parameters (%d)\n",
*npar);
break;
}
r = attr[*npar + 2];
g = attr[*npar + 3];
b = attr[*npar + 4];
*npar += 4;
if(!BETWEEN(r, 0, 255) || !BETWEEN(g, 0, 255) || !BETWEEN(b, 0, 255))
fprintf(stderr, "erresc: bad rgb color (%d,%d,%d)\n",
r, g, b);
else
idx = TRUECOLOR(r, g, b);
break;
case 5: /* indexed colour */
if (*npar + 2 >= l) {
fprintf(stderr,
"erresc(38): Incorrect number of parameters (%d)\n",
*npar);
break;
}
*npar += 2;
if(!BETWEEN(attr[*npar], 0, 255))
fprintf(stderr, "erresc: bad fgcolor %d\n", attr[*npar]);
else
idx = attr[*npar];
break;
case 0: /* implemented defined (only foreground) */
case 1: /* transparent */
case 3: /* direct colour in CMY space */
case 4: /* direct colour in CMYK space */
default:
fprintf(stderr,
"erresc(38): gfx attr %d unknown\n", attr[*npar]);
break;
}
return idx;
}
void
tsetattr(int *attr, int l) {
int i;
int32_t idx;
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 ((idx = tdefcolor(attr, &i, l)) >= 0)
term.c.attr.fg = idx;
break;
case 39:
term.c.attr.fg = defaultfg;
break;
case 48:
if ((idx = tdefcolor(attr, &i, l)) >= 0)
term.c.attr.bg = idx;
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;
}
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) {
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: /* swap screen & set/restore cursor as xterm */
if (!allowaltscreen)
break;
tcursor((set) ? CURSOR_SAVE : CURSOR_LOAD);
/* FALLTHRU */
case 47: /* swap screen */
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;
case 2004: /* 2004: bracketed paste mode */
MODBIT(term.mode, set, MODE_BRCKTPASTE);
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) {
char buf[40];
int len;
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 'i': /* MC -- Media Copy */
switch(csiescseq.arg[0]) {
case 0:
tdump();
break;
case 1:
tdumpline(term.c.y);
break;
case 2:
tdumpsel();
break;
case 4:
term.mode &= ~MODE_PRINT;
break;
case 5:
term.mode |= MODE_PRINT;
break;
}
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);
tputtab(csiescseq.arg[0]);
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);
tputtab(-csiescseq.arg[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 'n': /* DSR – Device Status Report (cursor position) */
if (csiescseq.arg[0] == 6) {
len = snprintf(buf, sizeof(buf),"\033[%i;%iR",
term.c.y+1, term.c.x+1);
ttywrite(buf, len);
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 j, narg, par;
term.esc &= ~(ESC_STR_END|ESC_STR);
strparse();
narg = strescseq.narg;
par = atoi(strescseq.args[0]);
switch(strescseq.type) {
case ']': /* OSC -- Operating System Command */
switch(par) {
case 0:
case 1:
case 2:
if(narg > 1)
xsettitle(strescseq.args[1]);
return;
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);
}
return;
}
break;
case 'k': /* old title set compatibility */
xsettitle(strescseq.args[0]);
return;
case 'P': /* DCS -- Device Control String */
case '_': /* APC -- Application Program Command */
case '^': /* PM -- Privacy Message */
return;
}
fprintf(stderr, "erresc: unknown str ");
strdump();
}
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
tprinter(char *s, size_t len) {
if(iofd != -1 && xwrite(iofd, s, len) < 0) {
fprintf(stderr, "Error writing in %s:%s\n",
opt_io, strerror(errno));
close(iofd);
iofd = -1;
}
}
void
toggleprinter(const Arg *arg) {
term.mode ^= MODE_PRINT;
}
void
printscreen(const Arg *arg) {
tdump();
}
void
printsel(const Arg *arg) {
tdumpsel();
}
void
tdumpsel(void) {
char *ptr;
if((ptr = getsel())) {
tprinter(ptr, strlen(ptr));
free(ptr);
}
}
void
tdumpline(int n) {
Glyph *bp, *end;
bp = &term.line[n][0];
end = &bp[term.col-1];
while(end > bp && !strcmp(" ", end->c))
--end;
if(bp != end || strcmp(bp->c, " ")) {
for( ;bp <= end; ++bp)
tprinter(bp->c, strlen(bp->c));
}
tprinter("\n", 1);
}
void
tdump(void) {
int i;
for(i = 0; i < term.row; ++i)
tdumpline(i);
}
void
tputtab(int n) {
uint x = term.c.x;
if(n > 0) {
while(x < term.col && n--)
for(++x; x < term.col && !term.tabs[x]; ++x)
/* nothing */ ;
} else if(n < 0) {
while(x > 0 && n++)
for(--x; x > 0 && !term.tabs[x]; --x)
/* nothing */ ;
}
tmoveto(x, term.c.y);
}
static inline bool
iscontrol(char c) {
return ISCONTROLC0(c) || ISCONTROLC1(c);
}
void
techo(char *buf, int len) {
for(; len > 0; buf++, len--) {
char c = *buf;
if(iscontrol(c)) { /* control code */
if(c & 0x80) {
c &= 0x7f;
tputc("^", 1);
tputc("[", 1);
} else if(c != '\n' && c != '\r' && c != '\t') {
c ^= '\x40';
tputc("^", 1);
}
tputc(&c, 1);
} else {
break;
}
}
if(len)
tputc(buf, len);
}
void
tdeftran(char ascii) {
char c, (*bp)[2];
static char tbl[][2] = {
{'0', CS_GRAPHIC0}, {'1', CS_GRAPHIC1}, {'A', CS_UK},
{'B', CS_USA}, {'<', CS_MULTI}, {'K', CS_GER},
{'5', CS_FIN}, {'C', CS_FIN},
{0, 0}
};
for (bp = &tbl[0]; (c = (*bp)[0]) && c != ascii; ++bp)
/* nothing */;
if (c == 0)
fprintf(stderr, "esc unhandled charset: ESC ( %c\n", ascii);
else
term.trantbl[term.icharset] = (*bp)[1];
}
void
tselcs(void) {
MODBIT(term.c.attr.mode,
term.trantbl[term.charset] == CS_GRAPHIC0,
ATTR_GFX);
}
bool
tcontrolcode(uchar ascii) {
static char question[UTF_SIZ] = "?";
switch(ascii) {
case '\t': /* HT */
tputtab(1);
break;
case '\b': /* BS */
tmoveto(term.c.x-1, term.c.y);
break;
case '\r': /* CR */
tmoveto(0, term.c.y);
break;
case '\f': /* LF */
case '\v': /* VT */
case '\n': /* LF */
/* go to first col if the mode is set */
tnewline(IS_SET(MODE_CRLF));
break;
case '\a': /* BEL */
if(term.esc & ESC_STR_END) {
/* backwards compatibility to xterm */
strhandle();
} else {
if(!(xw.state & WIN_FOCUSED))
xseturgency(1);
if (bellvolume)
XBell(xw.dpy, bellvolume);
}
break;
case '\033': /* ESC */
csireset();
term.esc &= ~(ESC_CSI|ESC_ALTCHARSET|ESC_TEST);
term.esc |= ESC_START;
return 1;
case '\016': /* SO */
term.charset = 0;
tselcs();
break;
case '\017': /* SI */
term.charset = 1;
tselcs();
break;
case '\032': /* SUB */
tsetchar(question, &term.c.attr, term.c.x, term.c.y);
case '\030': /* CAN */
csireset();
break;
case '\005': /* ENQ (IGNORED) */
case '\000': /* NUL (IGNORED) */
case '\021': /* XON (IGNORED) */
case '\023': /* XOFF (IGNORED) */
case 0177: /* DEL (IGNORED) */
case 0x84: /* TODO: IND */
case 0x85: /* TODO: NEL */
case 0x88: /* TODO: HTS */
case 0x8d: /* TODO: RI */
case 0x8e: /* TODO: SS2 */
case 0x8f: /* TODO: SS3 */
case 0x90: /* TODO: DCS */
case 0x98: /* TODO: SOS */
case 0x9a: /* TODO: DECID */
case 0x9b: /* TODO: CSI */
case 0x9c: /* TODO: ST */
case 0x9d: /* TODO: OSC */
case 0x9e: /* TODO: PM */
case 0x9f: /* TODO: APC */
break;
default:
return 0;
}
term.esc &= ~(ESC_STR_END|ESC_STR);
return 1;
}
void
tputc(char *c, int len) {
uchar ascii;
bool control;
long unicodep;
int width;
if(len == 1) {
width = 1;
ascii = *c;
} else {
utf8decode(c, &unicodep, UTF_SIZ);
width = wcwidth(unicodep);
ascii = unicodep;
}
control = iscontrol(ascii) && width == 1;
if(IS_SET(MODE_PRINT))
tprinter(c, len);
/*
* STR sequence must be checked before anything else
* because it uses all following characters until it
* receives a ESC, a SUB, a ST or any other C1 control
* character.
*/
if(term.esc & ESC_STR) {
if(width == 1 &&
(ascii == '\a' || ascii == 030 ||
ascii == 032 || ascii == 033 ||
ISCONTROLC1(ascii))) {
term.esc &= ~ESC_STR;
term.esc |= ESC_STR_END;
} else if(strescseq.len + len < sizeof(strescseq.buf) - 1) {
memmove(&strescseq.buf[strescseq.len], c, len);
strescseq.len += len;
return;
} 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) {
if (tcontrolcode(ascii))
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();
}
return;
} else if(term.esc & ESC_ALTCHARSET) {
tdeftran(ascii);
tselcs();
} 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);
}
}
} else {
switch(ascii) {
case '[':
term.esc |= ESC_CSI;
return;
case '#':
term.esc |= ESC_TEST;
return;
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;
return;
case '(': /* set primary charset G0 */
case ')': /* set secondary charset G1 */
case '*': /* set tertiary charset G2 */
case '+': /* set quaternary charset G3 */
term.icharset = ascii - '(';
term.esc |= ESC_ALTCHARSET;
return;
case 'D': /* IND -- Linefeed */
if(term.c.y == term.bot) {
tscrollup(term.top, 1);
} else {
tmoveto(term.c.x, term.c.y+1);
}
break;
case 'E': /* NEL -- Next line */
tnewline(1); /* always go to first col */
break;
case 'H': /* HTS -- Horizontal tab stop */
term.tabs[term.c.x] = 1;
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);
}
break;
case 'Z': /* DECID -- Identify Terminal */
ttywrite(VT102ID, sizeof(VT102ID) - 1);
break;
case 'c': /* RIS -- Reset to inital state */
treset();
xresettitle();
xloadcols();
break;
case '=': /* DECPAM -- Application keypad */
term.mode |= MODE_APPKEYPAD;
break;
case '>': /* DECPNM -- Normal keypad */
term.mode &= ~MODE_APPKEYPAD;
break;
case '7': /* DECSC -- Save Cursor */
tcursor(CURSOR_SAVE);
break;
case '8': /* DECRC -- Restore Cursor */
tcursor(CURSOR_LOAD);
break;
case '\\': /* ST -- String Terminator */
if(term.esc & ESC_STR_END)
strhandle();
break;
default:
fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n",
(uchar) ascii, isprint(ascii)? ascii:'.');
break;
}
}
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));
}
if(term.c.x+width > term.col)
tnewline(1);
tsetchar(c, &term.c.attr, term.c.x, term.c.y);
if(width == 2) {
term.line[term.c.y][term.c.x].mode |= ATTR_WIDE;
if(term.c.x+1 < term.col) {
term.line[term.c.y][term.c.x+1].c[0] = '\0';
term.line[term.c.y][term.c.x+1].mode = ATTR_WDUMMY;
}
}
if(term.c.x+width < term.col) {
tmoveto(term.c.x+width, 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] = xmalloc(col * sizeof(Glyph));
term.alt[i] = xmalloc(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);
}
tcursor(CURSOR_SAVE);
tswapscreen();
tcursor(CURSOR_LOAD);
} 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 };
static bool loaded;
Colour *cp;
if(loaded) {
for (cp = dc.col; cp < dc.col + LEN(dc.col); ++cp)
XftColorFree(xw.dpy, xw.vis, xw.cmap, cp);
}
/* 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);
}
}
loaded = true;
}
int
xsetcolorname(int x, const char *name) {
XRenderColor color = { .alpha = 0xffff };
Colour colour;
if(!BETWEEN(x, 0, LEN(colorname)))
return -1;
if(!name) {
if(BETWEEN(x, 16, 16 + 215)) {
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(BETWEEN(x, 16 + 216, 255)) {
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();
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;
if(xw.isfixed == True) {
sizeh->flags |= PMaxSize | PMinSize;
sizeh->min_width = sizeh->max_width = xw.w;
sizeh->min_height = sizeh->max_height = xw.h;
}
if(xw.gm & (XValue|YValue)) {
sizeh->flags |= USPosition | PWinGravity;
sizeh->x = xw.l;
sizeh->y = xw.t;
sizeh->win_gravity = xgeommasktogravity(xw.gm);
}
XSetWMProperties(xw.dpy, xw.win, NULL, NULL, NULL, 0, sizeh, &wm,
&class);
XFree(sizeh);
}
int
xgeommasktogravity(int mask) {
switch(mask & (XNegative|YNegative)) {
case 0:
return NorthWestGravity;
case XNegative:
return NorthEastGravity;
case YNegative:
return SouthWestGravity;
}
return SouthEastGravity;
}
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, double fontsize) {
FcPattern *pattern;
FcResult r_sz, r_psz;
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);
FcPatternDel(pattern, FC_SIZE);
FcPatternAddDouble(pattern, FC_PIXEL_SIZE, (double)fontsize);
usedfontsize = fontsize;
} else {
r_psz = FcPatternGetDouble(pattern, FC_PIXEL_SIZE, 0, &fontval);
r_sz = FcPatternGetDouble(pattern, FC_SIZE, 0, &fontval);
if(r_psz == FcResultMatch) {
usedfontsize = fontval;
} else if(r_sz == FcResultMatch) {
usedfontsize = -1;
} 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);
if(usedfontsize < 0) {
FcPatternGetDouble(dc.font.match->pattern,
FC_PIXEL_SIZE, 0, &fontval);
usedfontsize = fontval;
}
/* Setting character width and height. */
xw.cw = CEIL(dc.font.width * cwscale);
xw.ch = CEIL(dc.font.height * chscale);
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;
/* Free the loaded fonts in the font cache. */
for(i = 0; i < frclen; i++) {
XftFontClose(xw.dpy, frc[i].font);
}
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;
pid_t thispid = getpid();
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 */
xw.w = 2 * borderpx + term.col * xw.cw;
xw.h = 2 * borderpx + term.row * xw.ch;
if(xw.gm & XNegative)
xw.l += DisplayWidth(xw.dpy, xw.scr) - xw.w - 2;
if(xw.gm & YNegative)
xw.t += DisplayWidth(xw.dpy, xw.scr) - xw.h - 2;
/* 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.l, xw.t,
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);
xw.netwmname = XInternAtom(xw.dpy, "_NET_WM_NAME", False);
XSetWMProtocols(xw.dpy, xw.win, &xw.wmdeletewin, 1);
xw.netwmpid = XInternAtom(xw.dpy, "_NET_WM_PID", False);
XChangeProperty(xw.dpy, xw.win, xw.netwmpid, XA_CARDINAL, 32,
PropModeReplace, (uchar *)&thispid, 1);
xresettitle();
XMapWindow(xw.dpy, xw.win);
xhints();
XSync(xw.dpy, False);
}
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 frcflags;
int u8fl, u8fblen, u8cblen, doesexist;
char *u8c, *u8fs;
long unicodep;
Font *font = &dc.font;
FcResult fcres;
FcPattern *fcpattern, *fontpattern;
FcFontSet *fcsets[] = { NULL };
FcCharSet *fccharset;
Colour *fg, *bg, *temp, revfg, revbg, truefg, truebg;
XRenderColor colfg, colbg;
XRectangle r;
int oneatatime;
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;
}
if(IS_TRUECOL(base.fg)) {
colfg.alpha = 0xffff;
colfg.red = TRUERED(base.fg);
colfg.green = TRUEGREEN(base.fg);
colfg.blue = TRUEBLUE(base.fg);
XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colfg, &truefg);
fg = &truefg;
} else {
fg = &dc.col[base.fg];
}
if(IS_TRUECOL(base.bg)) {
colbg.alpha = 0xffff;
colbg.green = TRUEGREEN(base.bg);
colbg.red = TRUERED(base.bg);
colbg.blue = TRUEBLUE(base.bg);
XftColorAllocValue(xw.dpy, xw.vis, xw.cmap, &colbg, &truebg);
bg = &truebg;
} else {
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;
oneatatime = font->width != xw.cw;
for(;;) {
u8c = s;
u8cblen = utf8decode(s, &unicodep, UTF_SIZ);
s += u8cblen;
bytelen -= u8cblen;
doesexist = XftCharExists(xw.dpy, font->match, unicodep);
if(oneatatime || !doesexist || bytelen <= 0) {
if(oneatatime || bytelen <= 0) {
if(doesexist) {
u8fl++;
u8fblen += u8cblen;
}
}
if(u8fl > 0) {
XftDrawStringUtf8(xw.draw, fg,
font->match, xp,
winy + font->ascent,
(FcChar8 *)u8fs,
u8fblen);
xp += xw.cw * u8fl;
}
break;
}
u8fl++;
u8fblen += u8cblen;
}
if(doesexist) {
if(oneatatime)
continue;
break;
}
/* Search the font cache. */
for(i = 0; i < frclen; i++) {
if(XftCharExists(xw.dpy, frc[i].font, unicodep)
&& frc[i].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.
*
* Xft and fontconfig are design failures.
*/
fcpattern = FcPatternDuplicate(font->pattern);
fccharset = FcCharSetCreate();
FcCharSetAddChar(fccharset, unicodep);
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.
*/
if(frclen >= LEN(frc)) {
frclen = LEN(frc) - 1;
XftFontClose(xw.dpy, frc[frclen].font);
}
frc[frclen].font = XftFontOpenPattern(xw.dpy,
fontpattern);
frc[frclen].flags = frcflags;
i = frclen;
frclen++;
FcPatternDestroy(fcpattern);
FcCharSetDestroy(fccharset);
}
XftDrawStringUtf8(xw.draw, fg, frc[i].font,
xp, winy + frc[i].font->ascent,
(FcChar8 *)u8c, u8cblen);
xp += xw.cw * wcwidth(unicodep);
}
/*
* This is how the loop above actually should be. Why does the
* application have to care about font details?
*
* I have to repeat: Xft and Fontconfig are design failures.
*/
/*
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, width, curx;
Glyph g = {{' '}, ATTR_NULL, defaultbg, defaultcs};
LIMIT(oldx, 0, term.col-1);
LIMIT(oldy, 0, term.row-1);
curx = term.c.x;
/* adjust position if in dummy */
if(term.line[oldy][oldx].mode & ATTR_WDUMMY)
oldx--;
if(term.line[term.c.y][curx].mode & ATTR_WDUMMY)
curx--;
memcpy(g.c, term.line[term.c.y][term.c.x].c, UTF_SIZ);
/* remove the old cursor */
sl = utf8len(term.line[oldy][oldx].c);
width = (term.line[oldy][oldx].mode & ATTR_WIDE)? 2 : 1;
xdraws(term.line[oldy][oldx].c, term.line[oldy][oldx], oldx,
oldy, width, 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 = utf8len(g.c);
width = (term.line[term.c.y][curx].mode & ATTR_WIDE)\
? 2 : 1;
xdraws(g.c, g, term.c.x, term.c.y, width, sl);
} else {
XftDrawRect(xw.draw, &dc.col[defaultcs],
borderpx + curx * xw.cw,
borderpx + term.c.y * xw.ch,
xw.cw - 1, 1);
XftDrawRect(xw.draw, &dc.col[defaultcs],
borderpx + curx * xw.cw,
borderpx + term.c.y * xw.ch,
1, xw.ch - 1);
XftDrawRect(xw.draw, &dc.col[defaultcs],
borderpx + (curx + 1) * xw.cw - 1,
borderpx + term.c.y * xw.ch,
1, xw.ch - 1);
XftDrawRect(xw.draw, &dc.col[defaultcs],
borderpx + curx * xw.cw,
borderpx + (term.c.y + 1) * xw.ch - 1,
xw.cw, 1);
}
oldx = curx, oldy = term.c.y;
}
}
void
xsettitle(char *p) {
XTextProperty prop;
Xutf8TextListToTextProperty(xw.dpy, &p, 1, XUTF8StringStyle,
&prop);
XSetWMName(xw.dpy, xw.win, &prop);
XSetTextProperty(xw.dpy, xw.win, &prop, xw.netwmname);
XFree(prop.value);
}
void
xresettitle(void) {
xsettitle(opt_title ? opt_title : "st");
}
void
redraw(int timeout) {
struct timespec tv = {0, timeout * 1000};
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;
long unicodep;
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(new.mode == ATTR_WDUMMY)
continue;
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 = utf8decode(new.c, &unicodep, UTF_SIZ);
memcpy(buf+ib, new.c, sl);
ib += sl;
ic += (new.mode & ATTR_WIDE)? 2 : 1;
}
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);
}
}
static inline bool
match(uint mask, uint state) {
return mask == XK_ANY_MOD || mask == (state & ~ignoremod);
}
void
numlock(const Arg *dummy) {
term.numlock ^= 1;
}
char*
kmap(KeySym k, uint state) {
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++) {
if(kp->k != k)
continue;
if(!match(kp->mask, state))
continue;
if(IS_SET(MODE_APPKEYPAD) ? kp->appkey < 0 : kp->appkey > 0)
continue;
if(term.numlock && kp->appkey == 2)
continue;
if(IS_SET(MODE_APPCURSOR) ? kp->appcursor < 0 : kp->appcursor > 0)
continue;
if(IS_SET(MODE_CRLF) ? kp->crlf < 0 : kp->crlf > 0)
continue;
return kp->s;
}
return NULL;
}
void
kpress(XEvent *ev) {
XKeyEvent *e = &ev->xkey;
KeySym ksym;
char buf[32], *customkey;
int len;
long c;
Status status;
Shortcut *bp;
if(IS_SET(MODE_KBDLOCK))
return;
len = XmbLookupString(xw.xic, e, buf, sizeof buf, &ksym, &status);
/* 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))) {
ttysend(customkey, strlen(customkey));
return;
}
/* 3. composed string from input method */
if(len == 0)
return;
if(len == 1 && e->state & Mod1Mask) {
if(IS_SET(MODE_8BIT)) {
if(*buf < 0177) {
c = *buf | 0x80;
len = utf8encode(c, buf, UTF_SIZ);
}
} else {
buf[1] = buf[0];
buf[0] = '\033';
len = 2;
}
}
ttysend(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;
int w = xw.w, h = xw.h;
fd_set rfd;
int xfd = XConnectionNumber(xw.dpy), xev, blinkset = 0, dodraw = 0;
struct timeval drawtimeout, *tv = NULL, now, last, lastblink;
/* Waiting for window mapping */
while(1) {
XNextEvent(xw.dpy, &ev);
if(ev.type == ConfigureNotify) {
w = ev.xconfigure.width;
h = ev.xconfigure.height;
} else if(ev.type == MapNotify) {
break;
}
}
ttynew();
cresize(w, h);
gettimeofday(&last, NULL);
lastblink = last;
for(xev = actionfps;;) {
long deltatime;
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", strerror(errno));
}
if(FD_ISSET(cmdfd, &rfd)) {
ttyread();
if(blinktimeout) {
blinkset = tattrset(ATTR_BLINK);
if(!blinkset)
MODBIT(term.mode, 0, 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;
lastblink = now;
dodraw = 1;
}
deltatime = TIMEDIFF(now, last);
if(deltatime > (xev? (1000/xfps) : (1000/actionfps))
|| deltatime < 0) {
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) 2010-2014 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[]) {
char *titles;
uint cols = 80, rows = 24;
xw.l = xw.t = 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 = xstrdup(argv[1]);
opt_title = basename(titles);
}
}
goto run;
case 'f':
opt_font = EARGF(usage());
break;
case 'g':
xw.gm = XParseGeometry(EARGF(usage()),
&xw.l, &xw.t, &cols, &rows);
break;
case 'i':
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(cols? cols : 1, rows? rows : 1);
xinit();
selinit();
run();
return 0;
}
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