X-Git-Url: https://git.xinqibao.xyz/st.git/blobdiff_plain/375efb8891a2d131d46f1582fd770d34464094e0..c56332857145d1c6741d4f6c1bbc87dcc6c6ab97:/st.c?ds=sidebyside diff --git a/st.c b/st.c index a3421ff..623ca29 100644 --- a/st.c +++ b/st.c @@ -1,11 +1,1345 @@ -/* See LICENSE file for copyright and license details. */ +/* See LICENSE for licence details. */ +#define _XOPEN_SOURCE 600 +#include +#include +#include +#include +#include +#include #include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* Arbitrary sizes */ +#define ESC_TITLE_SIZ 256 +#define ESC_BUF_SIZ 256 +#define ESC_ARG_SIZ 16 +#define DRAW_BUF_SIZ 1024 + +#define SERRNO strerror(errno) +#define MIN(a, b) ((a) < (b) ? (a) : (b)) +#define MAX(a, b) ((a) < (b) ? (b) : (a)) +#define LEN(a) (sizeof(a) / sizeof(a[0])) +#define DEFAULT(a, b) (a) = (a) ? (a) : (b) +#define BETWEEN(x, a, b) ((a) <= (x) && (x) <= (b)) +#define LIMIT(x, a, b) (x) = (x) < (a) ? (a) : (x) > (b) ? (b) : (x) +#define ATTRCMP(a, b) ((a).mode != (b).mode || (a).fg != (b).fg || (a).bg != (b).bg) +#define IS_SET(flag) (term.mode & (flag)) + +/* Attribute, Cursor, Character state, Terminal mode, Screen draw mode */ +enum { ATTR_NULL=0 , ATTR_REVERSE=1 , ATTR_UNDERLINE=2, ATTR_BOLD=4, ATTR_GFX=8 }; +enum { CURSOR_UP, CURSOR_DOWN, CURSOR_LEFT, CURSOR_RIGHT, CURSOR_HIDE, CURSOR_DRAW, + CURSOR_SAVE, CURSOR_LOAD }; +enum { GLYPH_SET=1, GLYPH_DIRTY=2 }; +enum { MODE_WRAP=1, MODE_INSERT=2, MODE_APPKEYPAD=4 }; +enum { ESC_START=1, ESC_CSI=2, ESC_OSC=4, ESC_TITLE=8, ESC_ALTCHARSET=16 }; +enum { SCREEN_UPDATE, SCREEN_REDRAW }; + +typedef struct { + char c; /* character code */ + char mode; /* attribute flags */ + int fg; /* foreground */ + int bg; /* background */ + char state; /* state flags */ +} Glyph; + +typedef Glyph* Line; + +typedef struct { + Glyph attr; /* current char attributes */ + int x; + int y; +} TCursor; + +/* CSI Escape sequence structs */ +/* ESC '[' [[ [] [;]] ] */ +typedef struct { + char buf[ESC_BUF_SIZ]; /* raw string */ + int len; /* raw string length */ + char priv; + int arg[ESC_ARG_SIZ]; + int narg; /* nb of args */ + char mode; +} CSIEscape; + +/* Internal representation of the screen */ +typedef struct { + int row; /* nb row */ + int col; /* nb col */ + Line* line; /* screen */ + TCursor c; /* cursor */ + char hidec; + int top; /* top scroll limit */ + int bot; /* bottom scroll limit */ + int mode; /* terminal mode flags */ + int esc; /* escape state flags */ + char title[ESC_TITLE_SIZ]; + int titlelen; +} Term; + +/* Purely graphic info */ +typedef struct { + Display* dis; + Window win; + Pixmap buf; + int scr; + int w; /* window width */ + int h; /* window height */ + int bufw; /* pixmap width */ + int bufh; /* pixmap height */ + int ch; /* char height */ + int cw; /* char width */ +} XWindow; + +typedef struct { + KeySym k; + char s[ESC_BUF_SIZ]; +} Key; + +/* Drawing Context */ +typedef struct { + unsigned long col[256]; + XFontStruct* font; + XFontStruct* bfont; + GC gc; +} DC; + +#include "config.h" + +static void die(const char *errstr, ...); +static void draw(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 tclearregion(int, int, int, int); +static void tcursor(int); +static void tdeletechar(int); +static void tdeleteline(int); +static void tinsertblank(int); +static void tinsertblankline(int); +static void tmoveto(int, int); +static void tnew(int, int); +static void tnewline(void); +static void tputtab(void); +static void tputc(char); +static void tputs(char*, int); +static void treset(void); +static void tresize(int, int); +static void tscroll(void); +static void tscrollup(int); +static void tscrolldown(int); +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 void xbell(void); +static void xdraws(char *, Glyph, int, int, int); +static void xhints(void); +static void xclear(int, int, int, int); +static void xcursor(int); +static void xinit(void); +static void xloadcols(void); + +static void expose(XEvent *); +static char* kmap(KeySym); +static void kpress(XEvent *); +static void resize(XEvent *); + +static void (*handler[LASTEvent])(XEvent *) = { + [KeyPress] = kpress, + [Expose] = expose, + [ConfigureNotify] = resize +}; + +/* Globals */ +static DC dc; +static XWindow xw; +static Term term; +static CSIEscape 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 & GLYPH_SET ? c.c : '.'); + } + } + putchar('\n'); + } +} +#endif + +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[3] = {getenv("SHELL"), "-i", NULL}; + DEFAULT(args[0], "/bin/sh"); /* default shell if getenv() failed */ + putenv("TERM=" TNAME); + execvp(args[0], args); +} + +void +xbell(void) { /* visual bell */ + XRectangle r = { BORDER, BORDER, xw.bufw, xw.bufh }; + XSetForeground(xw.dis, dc.gc, dc.col[BellCol]); + XFillRectangles(xw.dis, xw.win, dc.gc, &r, 1); + /* usleep(30000); */ + draw(SCREEN_REDRAW); +} + +void +sigchld(int a) { + int stat = 0; + if(waitpid(pid, &stat, 0) < 0) + die("Waiting for pid %hd failed: %s\n", pid, SERRNO); + if(WIFEXITED(stat)) + exit(WEXITSTATUS(stat)); + else + exit(EXIT_FAILURE); +} + +void +ttynew(void) { + int m, s; + char *pts; + + if((m = posix_openpt(O_RDWR | O_NOCTTY)) < 0) + die("openpt failed: %s\n", SERRNO); + if(grantpt(m) < 0) + die("grantpt failed: %s\n", SERRNO); + if(unlockpt(m) < 0) + die("unlockpt failed: %s\n", SERRNO); + if(!(pts = ptsname(m))) + die("ptsname failed: %s\n", SERRNO); + if((s = open(pts, O_RDWR | O_NOCTTY)) < 0) + die("Couldn't open slave: %s\n", SERRNO); + fcntl(s, F_SETFL, O_NDELAY); + switch(pid = fork()) { + case -1: + die("fork failed\n"); + break; + case 0: + setsid(); /* create a new process group */ + dup2(s, STDIN_FILENO); + dup2(s, STDOUT_FILENO); + dup2(s, STDERR_FILENO); + if(ioctl(s, TIOCSCTTY, NULL) < 0) + die("ioctl TIOCSCTTY failed: %s\n", SERRNO); + close(s); + close(m); + execsh(); + break; + default: + close(s); + cmdfd = m; + signal(SIGCHLD, sigchld); + } +} + +void +dump(char c) { + static int col; + fprintf(stderr, " %02x '%c' ", c, isprint(c)?c:'.'); + if(++col % 10 == 0) + fprintf(stderr, "\n"); +} + +void +ttyread(void) { + char buf[BUFSIZ] = {0}; + int ret; + + if((ret = read(cmdfd, buf, BUFSIZ)) < 0) + die("Couldn't read from shell: %s\n", SERRNO); + else + tputs(buf, ret); +} + +void +ttywrite(const char *s, size_t n) { + if(write(cmdfd, s, n) == -1) + die("write error on tty: %s\n", SERRNO); +} + +void +ttyresize(int x, int y) { + struct winsize w; + + w.ws_row = term.row; + w.ws_col = term.col; + w.ws_xpixel = w.ws_ypixel = 0; + if(ioctl(cmdfd, TIOCSWINSZ, &w) < 0) + fprintf(stderr, "Couldn't set window size: %s\n", SERRNO); +} + +void +tcursor(int mode) { + static TCursor c; + + if(mode == CURSOR_SAVE) + c = term.c; + else if(mode == CURSOR_LOAD) + term.c = c, tmoveto(c.x, c.y); +} + +void +treset(void) { + term.c.attr.mode = ATTR_NULL; + term.c.attr.fg = DefaultFG; + term.c.attr.bg = DefaultBG; + term.c.x = term.c.y = 0; + term.hidec = 0; + term.top = 0, term.bot = term.row - 1; + term.mode = MODE_WRAP; + tclearregion(0, 0, term.col-1, term.row-1); +} + +void +tnew(int col, int row) { + /* screen size */ + term.row = row, term.col = col; + term.top = 0, term.bot = term.row - 1; + /* mode */ + term.mode = MODE_WRAP; + /* cursor */ + term.c.attr.mode = ATTR_NULL; + term.c.attr.fg = DefaultFG; + term.c.attr.bg = DefaultBG; + term.c.x = term.c.y = 0; + term.hidec = 0; + /* allocate screen */ + term.line = calloc(term.row, sizeof(Line)); + for(row = 0 ; row < term.row; row++) + term.line[row] = calloc(term.col, sizeof(Glyph)); +} + +/* TODO: Replace with scrollup/scolldown */ +void +tscroll(void) { + Line temp = term.line[term.top]; + int i; + + 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; +} + +void +tscrolldown (int n) { + int i; + Line temp; + + LIMIT(n, 0, term.bot-term.top+1); + + for(i = 0; i < n; i++) + memset(term.line[term.bot-i], 0, term.col*sizeof(Glyph)); + + for(i = term.bot; i >= term.top+n; i--) { + temp = term.line[i]; + term.line[i] = term.line[i-n]; + term.line[i-n] = temp; + } +} + +void +tscrollup (int n) { + int i; + Line temp; + LIMIT(n, 0, term.bot-term.top+1); + + for(i = 0; i < n; i++) + memset(term.line[term.top+i], 0, term.col*sizeof(Glyph)); + + for(i = term.top; i <= term.bot-n; i++) { + temp = term.line[i]; + term.line[i] = term.line[i+n]; + term.line[i+n] = temp; + } +} + +void +tnewline(void) { + int y = term.c.y + 1; + if(y > term.bot) + tscroll(), y = term.bot; + tmoveto(0, y); +} + +void +csiparse(void) { + /* int noarg = 1; */ + char *p = escseq.buf; + + escseq.narg = 0; + if(*p == '?') + escseq.priv = 1, p++; + + while(p < escseq.buf+escseq.len) { + while(isdigit(*p)) { + escseq.arg[escseq.narg] *= 10; + escseq.arg[escseq.narg] += *p++ - '0'/*, noarg = 0 */; + } + if(*p == ';' && escseq.narg+1 < ESC_ARG_SIZ) + escseq.narg++, p++; + else { + escseq.mode = *p; + escseq.narg++; + return; + } + } +} + +void +tmoveto(int x, int y) { + term.c.x = x < 0 ? 0 : x >= term.col ? term.col-1 : x; + term.c.y = y < 0 ? 0 : y >= term.row ? term.row-1 : y; +} + +void +tsetchar(char c) { + term.line[term.c.y][term.c.x] = term.c.attr; + term.line[term.c.y][term.c.x].c = c; + term.line[term.c.y][term.c.x].state |= GLYPH_SET; +} + +void +tclearregion(int x1, int y1, int x2, int y2) { + int 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++) + memset(&term.line[y][x1], 0, sizeof(Glyph)*(x2-x1+1)); +} + +void +tdeletechar(int n) { + int src = term.c.x + n; + int dst = term.c.x; + int size = term.col - src; + + if(src >= term.col) { + tclearregion(term.c.x, term.c.y, term.col-1, term.c.y); + return; + } + memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph)); + tclearregion(term.col-n, term.c.y, term.col-1, term.c.y); +} + +void +tinsertblank(int n) { + int src = term.c.x; + int dst = src + n; + int size = term.col - dst; + + if(dst >= term.col) { + tclearregion(term.c.x, term.c.y, term.col-1, term.c.y); + return; + } + memmove(&term.line[term.c.y][dst], &term.line[term.c.y][src], size * sizeof(Glyph)); + tclearregion(src, term.c.y, dst - 1, term.c.y); +} + +void +tinsertblankline(int n) { + int i; + Line blank; + int bot = term.bot; + + if(term.c.y > term.bot) + bot = term.row - 1; + else if(term.c.y < term.top) + bot = term.top - 1; + if(term.c.y + n >= bot) { + tclearregion(0, term.c.y, term.col-1, bot); + return; + } + for(i = bot; i >= term.c.y+n; i--) { + /* swap deleted line <-> blanked line */ + blank = term.line[i]; + term.line[i] = term.line[i-n]; + term.line[i-n] = blank; + /* blank it */ + memset(blank, 0, term.col * sizeof(Glyph)); + } +} + +void +tdeleteline(int n) { + int i; + Line blank; + int bot = term.bot; + + if(term.c.y > term.bot) + bot = term.row - 1; + else if(term.c.y < term.top) + bot = term.top - 1; + if(term.c.y + n >= bot) { + tclearregion(0, term.c.y, term.col-1, bot); + return; + } + for(i = term.c.y; i <= bot-n; i++) { + /* swap deleted line <-> blanked line */ + blank = term.line[i]; + term.line[i] = term.line[i+n]; + term.line[i+n] = blank; + /* blank it */ + memset(blank, 0, term.col * sizeof(Glyph)); + } +} + +void +tsetattr(int *attr, int l) { + int i; + + for(i = 0; i < l; i++) { + switch(attr[i]) { + case 0: + term.c.attr.mode &= ~(ATTR_REVERSE | ATTR_UNDERLINE | ATTR_BOLD); + term.c.attr.fg = DefaultFG; + term.c.attr.bg = DefaultBG; + break; + case 1: + term.c.attr.mode |= ATTR_BOLD; + break; + case 4: + term.c.attr.mode |= ATTR_UNDERLINE; + break; + case 7: + term.c.attr.mode |= ATTR_REVERSE; + break; + case 22: + term.c.attr.mode &= ~ATTR_BOLD; + break; + case 24: + term.c.attr.mode &= ~ATTR_UNDERLINE; + break; + case 27: + term.c.attr.mode &= ~ATTR_REVERSE; + break; + case 38: + if (i + 2 < l && attr[i + 1] == 5) { + i += 2; + if (BETWEEN(attr[i], 0, 255)) + term.c.attr.fg = attr[i]; + else + fprintf(stderr, "erresc: bad fgcolor %d\n", attr[i]); + } + else + fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]); + break; + case 39: + term.c.attr.fg = DefaultFG; + break; + case 48: + if (i + 2 < l && attr[i + 1] == 5) { + i += 2; + if (BETWEEN(attr[i], 0, 255)) + term.c.attr.bg = attr[i]; + else + fprintf(stderr, "erresc: bad bgcolor %d\n", attr[i]); + } + else + fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]); + break; + case 49: + term.c.attr.bg = DefaultBG; + break; + default: + if(BETWEEN(attr[i], 30, 37)) + term.c.attr.fg = attr[i] - 30; + else if(BETWEEN(attr[i], 40, 47)) + term.c.attr.bg = attr[i] - 40; + else if(BETWEEN(attr[i], 90, 97)) + term.c.attr.fg = attr[i] - 90 + 8; + else if(BETWEEN(attr[i], 100, 107)) + term.c.attr.fg = attr[i] - 100 + 8; + else + fprintf(stderr, "erresc: gfx attr %d unknown\n", attr[i]); + break; + } + } +} + +void +tsetscroll(int t, int b) { + int temp; + + LIMIT(t, 0, term.row-1); + LIMIT(b, 0, term.row-1); + if(t > b) { + temp = t; + t = b; + b = temp; + } + term.top = t; + term.bot = b; +} + +void +csihandle(void) { + switch(escseq.mode) { + default: + unknown: + printf("erresc: unknown csi "); + csidump(); + /* die(""); */ + break; + case '@': /* ICH -- Insert blank char */ + DEFAULT(escseq.arg[0], 1); + tinsertblank(escseq.arg[0]); + break; + case 'A': /* CUU -- Cursor Up */ + case 'e': + DEFAULT(escseq.arg[0], 1); + tmoveto(term.c.x, term.c.y-escseq.arg[0]); + break; + case 'B': /* CUD -- Cursor Down */ + DEFAULT(escseq.arg[0], 1); + tmoveto(term.c.x, term.c.y+escseq.arg[0]); + break; + case 'C': /* CUF -- Cursor Forward */ + case 'a': + DEFAULT(escseq.arg[0], 1); + tmoveto(term.c.x+escseq.arg[0], term.c.y); + break; + case 'D': /* CUB -- Cursor Backward */ + DEFAULT(escseq.arg[0], 1); + tmoveto(term.c.x-escseq.arg[0], term.c.y); + break; + case 'E': /* CNL -- Cursor Down and first col */ + DEFAULT(escseq.arg[0], 1); + tmoveto(0, term.c.y+escseq.arg[0]); + break; + case 'F': /* CPL -- Cursor Up and first col */ + DEFAULT(escseq.arg[0], 1); + tmoveto(0, term.c.y-escseq.arg[0]); + break; + case 'G': /* CHA -- Move to */ + case '`': /* XXX: HPA -- same? */ + DEFAULT(escseq.arg[0], 1); + tmoveto(escseq.arg[0]-1, term.c.y); + break; + case 'H': /* CUP -- Move to */ + case 'f': /* XXX: HVP -- same? */ + DEFAULT(escseq.arg[0], 1); + DEFAULT(escseq.arg[1], 1); + tmoveto(escseq.arg[1]-1, escseq.arg[0]-1); + break; + /* XXX: (CSI n I) CHT -- Cursor Forward Tabulation tab stops */ + case 'J': /* ED -- Clear screen */ + switch(escseq.arg[0]) { + case 0: /* below */ + tclearregion(term.c.x, term.c.y, term.col-1, term.row-1); + break; + case 1: /* above */ + tclearregion(0, 0, term.c.x, term.c.y); + break; + case 2: /* all */ + tclearregion(0, 0, term.col-1, term.row-1); + break; + case 3: /* XXX: erase saved lines (xterm) */ + default: + goto unknown; + } + break; + case 'K': /* EL -- Clear line */ + switch(escseq.arg[0]) { + case 0: /* right */ + tclearregion(term.c.x, term.c.y, term.col-1, term.c.y); + break; + case 1: /* left */ + tclearregion(0, term.c.y, term.c.x, term.c.y); + break; + case 2: /* all */ + tclearregion(0, term.c.y, term.col-1, term.c.y); + break; + } + break; + case 'S': /* SU -- Scroll line up */ + DEFAULT(escseq.arg[0], 1); + tscrollup(escseq.arg[0]); + break; + case 'T': /* SD -- Scroll line down */ + DEFAULT(escseq.arg[0], 1); + tscrolldown(escseq.arg[0]); + break; + case 'L': /* IL -- Insert blank lines */ + DEFAULT(escseq.arg[0], 1); + tinsertblankline(escseq.arg[0]); + break; + case 'l': /* RM -- Reset Mode */ + if(escseq.priv) { + switch(escseq.arg[0]) { + case 1: + term.mode &= ~MODE_APPKEYPAD; + break; + case 7: + term.mode &= ~MODE_WRAP; + break; + case 12: /* att610 -- Stop blinking cursor (IGNORED) */ + break; + case 25: + term.hidec = 1; + break; + case 1048: /* XXX: no alt. screen to erase/save */ + case 1049: + tcursor(CURSOR_LOAD); + tclearregion(0, 0, term.col-1, term.row-1); + break; + default: + goto unknown; + } + } else { + switch(escseq.arg[0]) { + case 4: + term.mode &= ~MODE_INSERT; + break; + default: + goto unknown; + } + } + break; + case 'M': /* DL -- Delete lines */ + DEFAULT(escseq.arg[0], 1); + tdeleteline(escseq.arg[0]); + break; + case 'X': /* ECH -- Erase char */ + DEFAULT(escseq.arg[0], 1); + tclearregion(term.c.x, term.c.y, term.c.x + escseq.arg[0], term.c.y); + break; + case 'P': /* DCH -- Delete char */ + DEFAULT(escseq.arg[0], 1); + tdeletechar(escseq.arg[0]); + break; + /* XXX: (CSI n Z) CBT -- Cursor Backward Tabulation tab stops */ + case 'd': /* VPA -- Move to */ + DEFAULT(escseq.arg[0], 1); + tmoveto(term.c.x, escseq.arg[0]-1); + break; + case 'h': /* SM -- Set terminal mode */ + if(escseq.priv) { + switch(escseq.arg[0]) { + case 1: + term.mode |= MODE_APPKEYPAD; + break; + case 7: + term.mode |= MODE_WRAP; + break; + case 12: /* att610 -- Start blinking cursor (IGNORED) */ + break; + case 25: + term.hidec = 0; + break; + case 1048: + case 1049: /* XXX: no alt. screen to erase/save */ + tcursor(CURSOR_SAVE); + tclearregion(0, 0, term.col-1, term.row-1); + break; + default: goto unknown; + } + } else { + switch(escseq.arg[0]) { + case 4: + term.mode |= MODE_INSERT; + break; + default: goto unknown; + } + }; + break; + case 'm': /* SGR -- Terminal attribute (color) */ + tsetattr(escseq.arg, escseq.narg); + break; + case 'r': /* DECSTBM -- Set Scrolling Region */ + if(escseq.priv) + goto unknown; + else { + DEFAULT(escseq.arg[0], 1); + DEFAULT(escseq.arg[1], term.row); + tsetscroll(escseq.arg[0]-1, escseq.arg[1]-1); + } + break; + case 's': /* DECSC -- Save cursor position (ANSI.SYS) */ + tcursor(CURSOR_SAVE); + break; + case 'u': /* DECRC -- Restore cursor position (ANSI.SYS) */ + tcursor(CURSOR_LOAD); + break; + } +} + +void +csidump(void) { + int i; + printf("ESC [ %s", escseq.priv ? "? " : ""); + if(escseq.narg) + for(i = 0; i < escseq.narg; i++) + printf("%d ", escseq.arg[i]); + if(escseq.mode) + putchar(escseq.mode); + putchar('\n'); +} + +void +csireset(void) { + memset(&escseq, 0, sizeof(escseq)); +} + +void +tputtab(void) { + int space = TAB - term.c.x % TAB; + tmoveto(term.c.x + space, term.c.y); +} + +void +tputc(char c) { + if(term.esc & ESC_START) { + if(term.esc & ESC_CSI) { + escseq.buf[escseq.len++] = c; + if(BETWEEN(c, 0x40, 0x7E) || escseq.len >= ESC_BUF_SIZ) { + term.esc = 0; + csiparse(), csihandle(); + } + } else if(term.esc & ESC_OSC) { + if(c == ';') { + term.titlelen = 0; + term.esc = ESC_START | ESC_TITLE; + } + } else if(term.esc & ESC_TITLE) { + if(c == '\a' || term.titlelen+1 >= ESC_TITLE_SIZ) { + term.esc = 0; + term.title[term.titlelen] = '\0'; + XStoreName(xw.dis, xw.win, term.title); + } else { + term.title[term.titlelen++] = c; + } + } else if(term.esc & ESC_ALTCHARSET) { + switch(c) { + case '0': /* Line drawing crap */ + term.c.attr.mode |= ATTR_GFX; + break; + case 'B': /* Back to regular text */ + term.c.attr.mode &= ~ATTR_GFX; + break; + default: + printf("esc unhandled charset: ESC ( %c\n", c); + } + term.esc = 0; + } else { + switch(c) { + case '[': + term.esc |= ESC_CSI; + break; + case ']': + term.esc |= ESC_OSC; + break; + case '(': + term.esc |= ESC_ALTCHARSET; + break; + case 'A': + tmoveto(term.c.x, term.c.y-1); + term.esc = 0; + break; + case 'B': + tmoveto(term.c.x, term.c.y+1); + term.esc = 0; + break; + case 'C': + tmoveto(term.c.x+1, term.c.y); + term.esc = 0; + break; + case 'D': /* XXX: CUP (VT100) or IND (VT52) ... */ + tmoveto(term.c.x-1, term.c.y); + term.esc = 0; + break; + case 'E': /* NEL -- Next line */ + tnewline(); + term.esc = 0; + break; + case 'M': /* RI -- Reverse index */ + if(term.c.y == term.top) + tscrolldown(1); + else + tmoveto(term.c.x, term.c.y-1); + term.esc = 0; + break; + case 'c': /* RIS -- Reset to inital state */ + treset(); + term.esc = 0; + break; + case '=': /* DECPAM */ + term.mode |= MODE_APPKEYPAD; + term.esc = 0; + break; + case '>': /* DECPNM */ + term.mode &= ~MODE_APPKEYPAD; + term.esc = 0; + break; + case '7': + tcursor(CURSOR_SAVE); + term.esc = 0; + break; + case '8': + tcursor(CURSOR_LOAD); + term.esc = 0; + break; + default: + fprintf(stderr, "erresc: unknown sequence ESC 0x%02X '%c'\n", c, isprint(c)?c:'.'); + term.esc = 0; + } + } + } else { + switch(c) { + case '\t': + tputtab(); + break; + case '\b': + tmoveto(term.c.x-1, term.c.y); + break; + case '\r': + tmoveto(0, term.c.y); + break; + case '\n': + tnewline(); + break; + case '\a': + xbell(); + break; + case '\033': + csireset(); + term.esc = ESC_START; + break; + default: + tsetchar(c); + if(term.c.x+1 < term.col) { + tmoveto(term.c.x+1, term.c.y); + } else if(IS_SET(MODE_WRAP)) + tnewline(); + break; + } + } +} + +void +tputs(char *s, int len) { + for(; len > 0; len--) + tputc(*s++); +} + +void +tresize(int col, int row) { + int i; + int minrow = MIN(row, term.row); + int mincol = MIN(col, term.col); + + if(col < 1 || row < 1) + return; + + /* free uneeded rows */ + for(i = row; i < term.row; i++) + free(term.line[i]); + + /* resize to new height */ + term.line = realloc(term.line, row * sizeof(Line)); + + /* resize each row to new width, zero-pad if needed */ + for(i = 0; i < minrow; i++) { + term.line[i] = realloc(term.line[i], col * sizeof(Glyph)); + memset(term.line[i] + mincol, 0, (col - mincol) * sizeof(Glyph)); + } + + /* allocate any new rows */ + for(/* i == minrow */; i < row; i++) + term.line[i] = calloc(col, sizeof(Glyph)); + + LIMIT(term.c.x, 0, col-1); + LIMIT(term.c.y, 0, row-1); + LIMIT(term.top, 0, row-1); + LIMIT(term.bot, 0, row-1); + + term.bot = row-1; + term.col = col, term.row = row; +} + +void +xloadcols(void) { + int i, r, g, b; + XColor color; + Colormap cmap = DefaultColormap(xw.dis, xw.scr); + unsigned long white = WhitePixel(xw.dis, xw.scr); + + for(i = 0; i < 16; i++) { + if (!XAllocNamedColor(xw.dis, cmap, colorname[i], &color, &color)) { + dc.col[i] = white; + fprintf(stderr, "Could not allocate color '%s'\n", colorname[i]); + } else + dc.col[i] = color.pixel; + } + + /* same colors as xterm */ + for(r = 0; r < 6; r++) + for(g = 0; g < 6; g++) + for(b = 0; b < 6; b++) { + color.red = r == 0 ? 0 : 0x3737 + 0x2828 * r; + color.green = g == 0 ? 0 : 0x3737 + 0x2828 * g; + color.blue = b == 0 ? 0 : 0x3737 + 0x2828 * b; + if (!XAllocColor(xw.dis, cmap, &color)) { + dc.col[i] = white; + fprintf(stderr, "Could not allocate color %d\n", i); + } else + dc.col[i] = color.pixel; + i++; + } + + for(r = 0; r < 24; r++, i++) { + color.red = color.green = color.blue = 0x0808 + 0x0a0a * r; + if (!XAllocColor(xw.dis, cmap, &color)) { + dc.col[i] = white; + fprintf(stderr, "Could not allocate color %d\n", i); + } else + dc.col[i] = color.pixel; + } +} + +void +xclear(int x1, int y1, int x2, int y2) { + XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]); + XFillRectangle(xw.dis, xw.buf, dc.gc, + x1 * xw.cw, y1 * xw.ch, + (x2-x1+1) * xw.cw, (y2-y1+1) * xw.ch); +} + +void +xhints(void) +{ + XClassHint class = {TNAME, TNAME}; + XWMHints wm = {.flags = InputHint, .input = 1}; + XSizeHints size = { + .flags = PSize | PResizeInc | PBaseSize, + .height = xw.h, + .width = xw.w, + .height_inc = xw.ch, + .width_inc = xw.cw, + .base_height = 2*BORDER, + .base_width = 2*BORDER, + }; + XSetWMProperties(xw.dis, xw.win, NULL, NULL, NULL, 0, &size, &wm, &class); +} + +void +xinit(void) { + if(!(xw.dis = XOpenDisplay(NULL))) + die("Can't open display\n"); + xw.scr = XDefaultScreen(xw.dis); + + /* font */ + if(!(dc.font = XLoadQueryFont(xw.dis, FONT)) || !(dc.bfont = XLoadQueryFont(xw.dis, BOLDFONT))) + die("Can't load font %s\n", dc.font ? BOLDFONT : FONT); + + /* XXX: Assuming same size for bold font */ + xw.cw = dc.font->max_bounds.rbearing - dc.font->min_bounds.lbearing; + xw.ch = dc.font->ascent + dc.font->descent; + + /* colors */ + xloadcols(); + + term.c.attr.fg = DefaultFG; + term.c.attr.bg = DefaultBG; + term.c.attr.mode = ATTR_NULL; + /* windows */ + xw.h = term.row * xw.ch + 2*BORDER; + xw.w = term.col * xw.cw + 2*BORDER; + xw.win = XCreateSimpleWindow(xw.dis, XRootWindow(xw.dis, xw.scr), 0, 0, + xw.w, xw.h, 0, + dc.col[DefaultBG], + dc.col[DefaultBG]); + xw.bufw = xw.w - 2*BORDER; + xw.bufh = xw.h - 2*BORDER; + xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr)); + /* gc */ + dc.gc = XCreateGC(xw.dis, xw.win, 0, NULL); + XMapWindow(xw.dis, xw.win); + xhints(); + XStoreName(xw.dis, xw.win, "st"); + XSync(xw.dis, 0); +} + +void +xdraws(char *s, Glyph base, int x, int y, int len) { + unsigned long xfg, xbg; + int winx = x*xw.cw, winy = y*xw.ch + dc.font->ascent, width = len*xw.cw; + int i; + + if(base.mode & ATTR_REVERSE) + xfg = dc.col[base.bg], xbg = dc.col[base.fg]; + else + xfg = dc.col[base.fg], xbg = dc.col[base.bg]; + + XSetBackground(xw.dis, dc.gc, xbg); + XSetForeground(xw.dis, dc.gc, xfg); + + if(base.mode & ATTR_GFX) + for(i = 0; i < len; i++) + s[i] = gfx[(int)s[i]]; + + XSetFont(xw.dis, dc.gc, base.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid); + XDrawImageString(xw.dis, xw.buf, dc.gc, winx, winy, s, len); + + if(base.mode & ATTR_UNDERLINE) + XDrawLine(xw.dis, xw.buf, dc.gc, winx, winy+1, winx+width-1, winy+1); +} + +void +xcursor(int mode) { + static int oldx = 0; + static int oldy = 0; + Glyph g = {' ', ATTR_NULL, DefaultBG, DefaultCS, 0}; + + LIMIT(oldx, 0, term.col-1); + LIMIT(oldy, 0, term.row-1); + + if(term.line[term.c.y][term.c.x].state & GLYPH_SET) + g.c = term.line[term.c.y][term.c.x].c; + + /* remove the old cursor */ + if(term.line[oldy][oldx].state & GLYPH_SET) + xdraws(&term.line[oldy][oldx].c, term.line[oldy][oldx], oldx, oldy, 1); + else + xclear(oldx, oldy, oldx, oldy); + + /* draw the new one */ + if(mode == CURSOR_DRAW) { + xdraws(&g.c, g, term.c.x, term.c.y, 1); + oldx = term.c.x, oldy = term.c.y; + } +} + +#ifdef DEBUG +/* basic drawing routines */ +void +xdrawc(int x, int y, Glyph g) { + XRectangle r = { x * xw.cw, y * xw.ch, xw.cw, xw.ch }; + XSetBackground(xw.dis, dc.gc, dc.col[g.bg]); + XSetForeground(xw.dis, dc.gc, dc.col[g.fg]); + XSetFont(xw.dis, dc.gc, g.mode & ATTR_BOLD ? dc.bfont->fid : dc.font->fid); + XDrawImageString(xw.dis, xw.buf, dc.gc, r.x, r.y+dc.font->ascent, &g.c, 1); +} + +void +draw(int dummy) { + int x, y; + + xclear(0, 0, term.col-1, term.row-1); + for(y = 0; y < term.row; y++) + for(x = 0; x < term.col; x++) + if(term.line[y][x].state & GLYPH_SET) + xdrawc(x, y, term.line[y][x]); + + if(!term.hidec) + xcursor(CURSOR_DRAW); + XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER); + XFlush(xw.dis); +} + +#else +/* optimized drawing routine */ +void +draw(int redraw_all) { + int i, x, y, ox; + Glyph base, new; + char buf[DRAW_BUF_SIZ]; + + XSetForeground(xw.dis, dc.gc, dc.col[DefaultBG]); + XFillRectangle(xw.dis, xw.buf, dc.gc, 0, 0, xw.w, xw.h); + for(y = 0; y < term.row; y++) { + base = term.line[y][0]; + i = ox = 0; + for(x = 0; x < term.col; x++) { + new = term.line[y][x]; + if(!ATTRCMP(base, new) && i < DRAW_BUF_SIZ) + buf[i++] = new.c; + else { + xdraws(buf, base, ox, y, i); + buf[0] = new.c; + i = 1; + ox = x; + base = new; + } + } + xdraws(buf, base, ox, y, i); + } + xcursor(term.hidec ? CURSOR_HIDE : CURSOR_DRAW); + XCopyArea(xw.dis, xw.buf, xw.win, dc.gc, 0, 0, xw.bufw, xw.bufh, BORDER, BORDER); + XFlush(xw.dis); +} + +#endif + +void +expose(XEvent *ev) { + draw(SCREEN_REDRAW); +} + +char* +kmap(KeySym k) { + int i; + for(i = 0; i < LEN(key); i++) + if(key[i].k == k) + return (char*)key[i].s; + return NULL; +} + +void +kpress(XEvent *ev) { + XKeyEvent *e = &ev->xkey; + KeySym ksym; + char buf[32]; + char *customkey; + int len; + int meta; + int shift; + + meta = e->state & Mod1Mask; + shift = e->state & ShiftMask; + len = XLookupString(e, buf, sizeof(buf), &ksym, NULL); + + if((customkey = kmap(ksym))) + ttywrite(customkey, strlen(customkey)); + else if(len > 0) { + buf[sizeof(buf)-1] = '\0'; + if(meta && len == 1) + ttywrite("\033", 1); + ttywrite(buf, len); + } else + switch(ksym) { + case XK_Up: + case XK_Down: + case XK_Left: + case XK_Right: + sprintf(buf, "\033%c%c", IS_SET(MODE_APPKEYPAD) ? 'O' : '[', "DACB"[ksym - XK_Left]); + ttywrite(buf, 3); + break; + case XK_Insert: + if(shift) + draw(1), puts("draw!")/* XXX: paste X clipboard */; + break; + default: + fprintf(stderr, "errkey: %d\n", (int)ksym); + break; + } +} + +void +resize(XEvent *e) { + int col, row; + + if(e->xconfigure.width == xw.w && e->xconfigure.height == xw.h) + return; + + xw.w = e->xconfigure.width; + xw.h = e->xconfigure.height; + xw.bufw = xw.w - 2*BORDER; + xw.bufh = xw.h - 2*BORDER; + col = xw.bufw / xw.cw; + row = xw.bufh / xw.ch; + tresize(col, row); + ttyresize(col, row); + XFreePixmap(xw.dis, xw.buf); + xw.buf = XCreatePixmap(xw.dis, xw.win, xw.bufw, xw.bufh, XDefaultDepth(xw.dis, xw.scr)); + draw(SCREEN_REDRAW); +} + +void +run(void) { + XEvent ev; + fd_set rfd; + int xfd = XConnectionNumber(xw.dis); + + running = 1; + XSelectInput(xw.dis, xw.win, ExposureMask | KeyPressMask | StructureNotifyMask); + XResizeWindow(xw.dis, xw.win, xw.w, xw.h); /* XXX: fix resize bug in wmii (?) */ + + while(running) { + FD_ZERO(&rfd); + FD_SET(cmdfd, &rfd); + FD_SET(xfd, &rfd); + if(select(MAX(xfd, cmdfd)+1, &rfd, NULL, NULL, NULL) == -1) { + if(errno == EINTR) + continue; + die("select failed: %s\n", SERRNO); + } + if(FD_ISSET(cmdfd, &rfd)) { + ttyread(); + draw(SCREEN_UPDATE); + } + while(XPending(xw.dis)) { + XNextEvent(xw.dis, &ev); + if(handler[ev.type]) + (handler[ev.type])(&ev); + } + } +} int -Xmain(int argc, char *argv[]) { - if(argc == 2 && !strcmp("-v", argv[1])) - eprint("st-"VERSION", © 2007-2008 st engineers, see LICENSE for details\n"); +main(int argc, char *argv[]) { + if(argc == 2 && !strncmp("-v", argv[1], 3)) + die("st-" VERSION ", (c) 2010 st engineers\n"); else if(argc != 1) - eprint("usage: st [-v]\n"); + die("usage: st [-v]\n"); + setlocale(LC_CTYPE, ""); + tnew(80, 24); + ttynew(); + xinit(); + run(); return 0; }