X-Git-Url: https://git.xinqibao.xyz/st.git/blobdiff_plain/ad39f000be87ec16e74c05bdc3fa81ef307b5477..dab8326e6428a5db6b7a6e08f40fa1e5ac77bc6f:/st.c
diff --git a/st.c b/st.c
index 64a37e1..5f40ddd 100644
--- a/st.c
+++ b/st.c
@@ -1,14 +1,188 @@
/* See LICENSE for licence details. */
-#include "st.h"
+#define _XOPEN_SOURCE 600
+#include <ctype.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <locale.h>
+#include <stdarg.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/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <X11/Xlib.h>
+#include <X11/keysym.h>
+#include <X11/Xutil.h>
+
+#define TNAME "st"
+
+/* Arbitrary sizes */
+#define ESCSIZ 256
+#define ESCARG 16
+
+#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)
+
+/* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */
+enum { ATnone=0 , ATreverse=1 , ATunderline=2, ATbold=4 };
+enum { CSup, CSdown, CSright, CSleft, CShide, CSdraw, CSwrap, CSsave, CSload };
+enum { CRset=1, CRupdate=2 };
+enum { TMwrap=1, TMinsert=2 };
+enum { SCupdate, SCredraw };
+
+typedef int Color;
+
+typedef struct {
+ char c; /* character code */
+ char mode; /* attribute flags */
+ Color fg; /* foreground */
+ Color bg; /* background */
+ char state; /* state flag */
+} Glyph;
+
+typedef Glyph* Line;
+
+typedef struct {
+ Glyph attr; /* current char attributes */
+ char hidden;
+ int x;
+ int y;
+} TCursor;
+
+/* Escape sequence structs */
+/* ESC <pre> [[ [<priv>] <arg> [;]] <mode>] */
+typedef struct {
+ char buf[ESCSIZ+1]; /* raw string */
+ int len; /* raw string length */
+ char pre;
+ char priv;
+ int arg[ESCARG+1];
+ int narg; /* nb of args */
+ char mode;
+} Escseq;
+
+/* Internal representation of the screen */
+typedef struct {
+ int row; /* nb row */
+ int col; /* nb col */
+ Line* line; /* screen */
+ TCursor c; /* cursor */
+ int top; /* top scroll limit */
+ int bot; /* bottom scroll limit */
+ int mode; /* terminal mode */
+} Term;
+
+/* Purely graphic info */
+typedef struct {
+ Display* dis;
+ Window win;
+ int scr;
+ int w; /* window width */
+ int h; /* window height */
+ int ch; /* char height */
+ int cw; /* char width */
+} XWindow;
+
+#include "config.h"
+
+/* Drawing Context */
+typedef struct {
+ unsigned long col[LEN(colorname)];
+ XFontStruct* font;
+ GC gc;
+} DC;
+
+static void die(const char *errstr, ...);
+static void draw(int);
+static void execsh(void);
+static void sigchld(int);
+static void run(void);
+
+static int escaddc(char);
+static int escfinal(char);
+static void escdump(void);
+static void eschandle(void);
+static void escparse(void);
+static void escreset(void);
+
+static void tclearregion(int, int, int, int);
+static void tcpos(int);
+static void tcursor(int);
+static void tdeletechar(int);
+static void tdeleteline(int);
+static void tinsertblank(int);
+static void tinsertblankline(int);
+static void tmoveto(int, int);
+static void tnew(int, int);
+static void tnewline(void);
+static void tputc(char);
+static void tputs(char*, int);
+static void tresize(int, int);
+static void tscroll(void);
+static void tsetattr(int*, int);
+static void tsetchar(char);
+static void tsetscroll(int, int);
+
+static void ttynew(void);
+static void ttyread(void);
+static void ttyresize(int, int);
+static void ttywrite(const char *, size_t);
+
+static unsigned long xgetcol(const char *);
+static void xclear(int, int, int, int);
+static void xcursor(int);
+static void xdrawc(int, int, Glyph);
+static void xinit(void);
+static void xscroll(void);
+
+static void expose(XEvent *);
+static void kpress(XEvent *);
+static void resize(XEvent *);
+
+static void (*handler[LASTEvent])(XEvent *) = {
+ [KeyPress] = kpress,
+ [Expose] = expose,
+ [ConfigureNotify] = resize
+};
/* Globals */
-DC dc;
-XWindow xw;
-Term term;
-Escseq escseq;
-int cmdfd;
-pid_t pid;
-int running;
+static DC dc;
+static XWindow xw;
+static Term term;
+static Escseq escseq;
+static int cmdfd;
+static pid_t pid;
+static int running;
+
+#ifdef DEBUG
+void
+tdump(void) {
+ int row, col;
+ Glyph c;
+
+ for(row = 0; row < term.row; row++) {
+ for(col = 0; col < term.col; col++) {
+ if(col == term.c.x && row == term.c.y)
+ putchar('#');
+ else {
+ c = term.line[row][col];
+ putchar(c.state & CRset ? c.c : '.');
+ }
+ }
+ putchar('\n');
+ }
+}
+#endif
void
die(const char *errstr, ...) {
@@ -47,7 +221,6 @@ sigchld(int a) {
exit(EXIT_FAILURE);
}
-
void
ttynew(void) {
int m, s;
@@ -107,7 +280,7 @@ ttyread(void) {
}
void
-ttywrite(char *s, size_t n) {
+ttywrite(const char *s, size_t n) {
if(write(cmdfd, s, n) == -1)
die("write error on tty: %s\n", SERRNO);
}
@@ -174,21 +347,19 @@ void
tscroll(void) {
Line temp = term.line[term.top];
int i;
-
+ /* X stuff _before_ the line swapping (results in wrong line index) */
+ xscroll();
for(i = term.top; i < term.bot; i++)
term.line[i] = term.line[i+1];
memset(temp, 0, sizeof(Glyph) * term.col);
term.line[term.bot] = temp;
- xscroll();
}
void
tnewline(void) {
int y = term.c.y + 1;
-
- if(y > term.bot) {
+ if(y > term.bot)
tscroll(), y = term.bot;
- }
tmoveto(0, y);
}
@@ -322,6 +493,13 @@ tinsertblank(int n) {
tclearregion(src, term.c.y, dst, term.c.y);
}
+void
+tsetlinestate(int n, int state) {
+ int i;
+ for(i = 0; i < term.col; i++)
+ term.line[n][i].state |= state;
+}
+
void
tinsertblankline (int n) {
int i;
@@ -343,10 +521,11 @@ tinsertblankline (int n) {
term.line[i-n] = blank;
/* blank it */
memset(blank, 0, term.col * sizeof(Glyph));
+ tsetlinestate(i, CRupdate);
+ tsetlinestate(i-n, CRupdate);
}
}
-
void
tdeleteline(int n) {
int i;
@@ -368,6 +547,8 @@ tdeleteline(int n) {
term.line[i+n] = blank;
/* blank it */
memset(blank, 0, term.col * sizeof(Glyph));
+ tsetlinestate(i, CRupdate);
+ tsetlinestate(i-n, CRupdate);
}
}
@@ -375,48 +556,48 @@ void
tsetattr(int *attr, int l) {
int i;
- for(i = 0; i < l; i++) {
- switch(attr[i]) {
- case 0:
- memset(&term.c.attr, 0, sizeof(term.c.attr));
- term.c.attr.fg = DefaultFG;
- term.c.attr.bg = DefaultBG;
- break;
- case 1:
- term.c.attr.mode |= ATbold;
- break;
- case 4:
- term.c.attr.mode |= ATunderline;
- break;
- case 7:
- term.c.attr.mode |= ATreverse;
- break;
- case 8:
- term.c.hidden = CShide;
- break;
- case 22:
- term.c.attr.mode &= ~ATbold;
- break;
- case 24:
- term.c.attr.mode &= ~ATunderline;
- break;
- case 27:
- term.c.attr.mode &= ~ATreverse;
- break;
- case 39:
- term.c.attr.fg = DefaultFG;
- break;
- case 49:
- term.c.attr.fg = 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;
- break;
- }
+ for(i = 0; i < l; i++) {
+ switch(attr[i]) {
+ case 0:
+ memset(&term.c.attr, 0, sizeof(term.c.attr));
+ term.c.attr.fg = DefaultFG;
+ term.c.attr.bg = DefaultBG;
+ break;
+ case 1:
+ term.c.attr.mode |= ATbold;
+ break;
+ case 4:
+ term.c.attr.mode |= ATunderline;
+ break;
+ case 7:
+ term.c.attr.mode |= ATreverse;
+ break;
+ case 8:
+ term.c.hidden = CShide;
+ break;
+ case 22:
+ term.c.attr.mode &= ~ATbold;
+ break;
+ case 24:
+ term.c.attr.mode &= ~ATunderline;
+ break;
+ case 27:
+ term.c.attr.mode &= ~ATreverse;
+ break;
+ case 39:
+ term.c.attr.fg = DefaultFG;
+ break;
+ case 49:
+ term.c.attr.fg = 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;
+ break;
}
+ }
}
void
@@ -434,13 +615,18 @@ tsetscroll(int t, int b) {
term.bot = b;
}
-
void
-eschandle(void) {
- /* escdump(); */
+eschandle(void) {
switch(escseq.pre) {
+ default:
+ goto unknown_seq;
case '[':
switch(escseq.mode) {
+ default:
+ unknown_seq:
+ fprintf(stderr, "erresc: unknown sequence\n");
+ escdump();
+ break;
case '@': /* Insert <n> blank char */
DEFAULT(escseq.arg[0], 1);
tinsertblank(escseq.arg[0]);
@@ -558,15 +744,13 @@ eschandle(void) {
void
escdump(void) {
int i;
- puts("------");
printf("rawbuf : %s\n", escseq.buf);
printf("prechar : %c\n", escseq.pre);
printf("private : %c\n", escseq.priv ? '?' : ' ');
printf("narg : %d\n", escseq.narg);
- if(escseq.narg) {
+ if(escseq.narg)
for(i = 0; i < escseq.narg; i++)
printf("\targ %d = %d\n", i, escseq.arg[i]);
- }
printf("mode : %c\n", escseq.mode);
}
@@ -627,24 +811,6 @@ tputs(char *s, int len) {
tputc(*s++);
}
-void
-tdump(void) {
- int row, col;
- Glyph c;
-
- for(row = 0; row < term.row; row++) {
- for(col = 0; col < term.col; col++) {
- if(col == term.c.x && row == term.c.y)
- putchar('#');
- else {
- c = term.line[row][col];
- putchar(c.state & CRset ? c.c : '.');
- }
- }
- putchar('\n');
- }
-}
-
void
tresize(int col, int row) {
int i;
@@ -688,7 +854,6 @@ xgetcol(const char *s) {
return color.pixel;
}
-
void
xclear(int x1, int y1, int x2, int y2) {
XClearArea(xw.dis, xw.win,
@@ -697,7 +862,6 @@ xclear(int x1, int y1, int x2, int y2) {
False);
}
-
void
xscroll(void) {
int srcy = (term.top+1) * xw.ch;
@@ -709,9 +873,6 @@ xscroll(void) {
xclear(0, term.bot, term.col-1, term.bot);
}
-
-
-
void
xinit(void) {
XGCValues values;
@@ -725,11 +886,11 @@ xinit(void) {
xw.dis = XOpenDisplay(NULL);
xw.scr = XDefaultScreen(xw.dis);
if(!xw.dis)
- die("can not open display");
+ die("Can't open display\n");
/* font */
if(!(dc.font = XLoadQueryFont(xw.dis, FONT)))
- die("can not find font " FONT);
+ die("Can't load font %s\n", FONT);
xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing;
xw.ch = dc.font->ascent + dc.font->descent + LINESPACE;
@@ -805,14 +966,15 @@ xcursor(int mode) {
/* remove the old cursor */
if(term.line[oldy][oldx].state & CRset)
xdrawc(oldx, oldy, term.line[oldy][oldx]);
- else xclear(oldx, oldy, oldx, oldy); /* XXX: maybe a bug */
- if(mode == CSdraw && !term.c.hidden) {
+ else
+ xclear(oldx, oldy, oldx, oldy);
+ /* draw the new one */
+ if(mode == CSdraw) {
xdrawc(term.c.x, term.c.y, g);
oldx = term.c.x, oldy = term.c.y;
}
}
-
void
draw(int redraw_all) {
int x, y;
@@ -820,14 +982,18 @@ draw(int redraw_all) {
if(redraw_all)
XClearWindow(xw.dis, xw.win);
+
/* XXX: drawing could be optimised */
for(y = 0; y < term.row; y++) {
for(x = 0; x < term.col; x++) {
changed = term.line[y][x].state & CRupdate;
set = term.line[y][x].state & CRset;
- if((changed && set) || (redraw_all && set)) {
+ if(redraw_all || changed) {
term.line[y][x].state &= ~CRupdate;
- xdrawc(x, y, term.line[y][x]);
+ if(set)
+ xdrawc(x, y, term.line[y][x]);
+ else
+ xclear(x, y, x, y);
}
}
}
@@ -835,7 +1001,13 @@ draw(int redraw_all) {
}
void
-kpress(XKeyEvent *e) {
+expose(XEvent *ev) {
+ draw(SCredraw);
+}
+
+void
+kpress(XEvent *ev) {
+ XKeyEvent *e = &ev->xkey;
KeySym ksym;
char buf[32];
int len;
@@ -845,35 +1017,23 @@ kpress(XKeyEvent *e) {
meta = e->state & Mod1Mask;
shift = e->state & ShiftMask;
len = XLookupString(e, buf, sizeof(buf), &ksym, NULL);
- if(len > 0) {
+ if(key[ksym])
+ ttywrite(key[ksym], strlen(key[ksym]));
+ else if(len > 0) {
buf[sizeof(buf)-1] = '\0';
if(meta && len == 1)
ttywrite("\033", 1);
ttywrite(buf, len);
- return;
- }
- switch(ksym) {
- default:
- fprintf(stderr, "errkey: %d\n", (int)ksym);
- break;
- case XK_Up:
- case XK_Down:
- case XK_Left:
- case XK_Right:
- sprintf(buf, "\033[%c", "DACB"[ksym - XK_Left]);
- ttywrite(buf, 3);
- break;
- case XK_Delete: ttywrite(KEYDELETE, sizeof(KEYDELETE)-1); break;
- case XK_Home: ttywrite(KEYHOME, sizeof(KEYHOME)-1); break;
- case XK_End: ttywrite(KEYEND, sizeof(KEYEND) -1); break;
- case XK_Prior: ttywrite(KEYPREV, sizeof(KEYPREV)-1); break;
- case XK_Next: ttywrite(KEYNEXT, sizeof(KEYNEXT)-1); break;
- case XK_Insert:
- /* XXX: paste X clipboard */
- if(shift)
- ;
- break;
- }
+ } else
+ switch(ksym) {
+ case XK_Insert:
+ if(shift)
+ /* XXX: paste X clipboard */;
+ break;
+ default:
+ fprintf(stderr, "errkey: %d\n", (int)ksym);
+ break;
+ }
}
void
@@ -891,10 +1051,8 @@ resize(XEvent *e) {
}
}
-
void
run(void) {
- int ret;
XEvent ev;
fd_set rfd;
int xfd = XConnectionNumber(xw.dis);
@@ -902,39 +1060,25 @@ run(void) {
running = 1;
XSelectInput(xw.dis, xw.win, ExposureMask | KeyPressMask | StructureNotifyMask);
XResizeWindow(xw.dis, xw.win, xw.w , xw.h); /* fix resize bug in wmii (?) */
-
+
while(running) {
FD_ZERO(&rfd);
FD_SET(cmdfd, &rfd);
FD_SET(xfd, &rfd);
- XFlush(xw.dis);
- ret = select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL);
-
- if(ret < 0)
+ if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) == -1) {
+ if(errno == EINTR)
+ continue;
die("select failed: %s\n", SERRNO);
-
- if(FD_ISSET(xfd, &rfd)) {
- while(XPending(xw.dis)) {
- XNextEvent(xw.dis, &ev);
- switch (ev.type) {
- default:
- break;
- case KeyPress:
- kpress(&ev.xkey);
- break;
- case Expose:
- draw(SCredraw);
- break;
- case ConfigureNotify:
- resize(&ev);
- break;
- }
- }
}
if(FD_ISSET(cmdfd, &rfd)) {
ttyread();
draw(SCupdate);
}
+ while(XPending(xw.dis)) {
+ XNextEvent(xw.dis, &ev);
+ if(handler[ev.type])
+ (handler[ev.type])(&ev);
+ }
}
}