/
termk.c
1435 lines (1395 loc) · 32.9 KB
/
termk.c
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#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <string.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/select.h>
#include <fcntl.h>
#include <term.h>
#include <signal.h>
#include <errno.h>
#include <SDL.h>
#include <X11/Xlib.h> // needed to ring the Xbell
#include "bits.h"
#include "kern.h"
#include "kfa.h"
#include "pbm.h"
#define SINCE_LIMIT 65536 // limit for 'batching' input before doing a screen update
#define min(a,b) ((a)<(b)?(a):(b))
#define max(a,b) ((a)>(b)?(a):(b))
typedef struct
{
unsigned char fore, back;
bool revvid;
bool bold;
}
attr;
#define DEFAULT_ATTR ((attr){.fore=7, .back=0, .revvid=false, .bold=false})
typedef unsigned char colour[3];
SDL_Surface *ginit(unsigned int w, unsigned int h, unsigned char bpp);
void pchar(SDL_Surface *scrn, unsigned int x, unsigned int y, char c, attr a);
void dpstr(SDL_Surface *scrn, unsigned int x, unsigned int y, const char *s, const attr *at, const signed char *dev, bool iscy, unsigned int cx, bool forcebw);
void invert(SDL_Surface *scrn, SDL_Rect r);
void filter(SDL_Surface *scrn, SDL_Rect r, colour fore, colour back);
void colourmap(attr a, colour fore, colour back);
void do_write(int fd, const char *);
typedef struct
{
SDL_Surface *data;
SDL_Surface *bold;
unsigned char what[3];
signed char spa[2];
}
lig;
typedef struct
{
char *name;
bool bold;
SDL_Surface *data;
}
lid;
SDL_Surface *letters[96];
SDL_Surface *bold[96];
SDL_Surface *metas[32]; // from M-_ to M-~
unsigned int nlids;
lid *lids;
unsigned int nligs;
lig *ligs;
typedef struct
{
unsigned int y;
unsigned int x;
}
point;
point fsiz={13, 6};
typedef struct
{
unsigned int nlines; // scrollback size
unsigned int rows; // screen size
unsigned int cols;
unsigned int scroll; // amount view is scrolled by
unsigned int scrold;
attr sgr; // currently set attributes
char **text;
attr **at;
signed char **dev;
bool (*dirty)[2]; // [0]=dev, [1]=screen
point cur;
point old;
point save;
bool meta;
bool status;
unsigned int statusp;
char statusline[81]; // status-line buffer
unsigned int esc;
char escd[256]; // escape codes buffer
}
terminal;
int initterm(terminal *t, unsigned int nlines, unsigned int rows, unsigned int cols);
void cdown(terminal *t);
bool cright(terminal *t, bool wrap);
int getpm(const char *escd, unsigned int *i, unsigned int *g, unsigned int e);
bool black=false;
int main(int argc, char *argv[])
{
const char *program="bash";
char *fake_arg=NULL, *const *argp=&fake_arg;
const char *font="as";
bool green=false;
bool terminfo=true;
bool wide=false;
for(int arg=1;arg<argc;arg++)
{
if(argv[arg][0]=='-')
{
if(strcmp(argv[arg], "--")==0)
{
program=argv[arg+1];
argp=argv+arg+1;
break;
}
else if((strcmp(argv[arg], "--help")==0)||(strcmp(argv[arg], "-h")==0))
{
fprintf(stderr, "Usage: termk [<opts>] [<program> [<args>]]\n");
fprintf(stderr, "Options:\n\t--\t\tEnd option list (for <program> beginning with '-')\n\t--green\t\tUse green display filter\n\t-18\t\tUse font \"18\"\n");
return(EXIT_SUCCESS);
}
else if(strcmp(argv[arg], "--green")==0)
{
green=true;
}
else if(strcmp(argv[arg], "-18")==0)
{
font="18";
}
else if(strcmp(argv[arg], "--scribit")==0)
{
font="scribit";
black=true;
}
else if(strcmp(argv[arg], "--vt52")==0)
{
terminfo=false;
}
else if(strcmp(argv[arg], "--wide")==0)
{
wide=true;
}
else
{
fprintf(stderr, "termk: unrecognised option, ignoring: %s\n", argv[arg]);
}
}
else
{
program=argv[arg];
argp=argv+arg;
break;
}
}
const char *term=NULL;
if(terminfo)
{
const char * const terms[]={"termk52-w", "termk52", "termk-vt52","termk","vt52-am",NULL};
unsigned int i=wide?0:1;
while(terms[i])
{
int errret;
if(setupterm(terms[i], 1, &errret))
{
switch(errret)
{
case 1: // hardcopy
// merely unsuitable, so carry on looking
fprintf(stderr, "terminfo '%s' unsuitable: is hardcopy\n", terms[i]);
break;
case 0: // terminfo entry not found
// merely unsuitable, so carry on looking
fprintf(stderr, "terminfo '%s' not found\n", terms[i]);
break;
case -1: // terminfo database not found
default: // unknown error
// fatal error
fprintf(stderr, "terminfo '%s': setupterm error %d\n", terms[i], errret);
terminfo=false;
goto noti;
break;
}
}
else
{
term=terms[i];
fprintf(stderr, "terminfo '%s' selected\n", term);
break;
}
i++;
}
}
else
{
noti:
term="vt52";
fprintf(stderr, "no terminfo. $TERM=%s\n", term);
}
KERN *k=NULL;
for(unsigned int i=0;i<96;i++)
letters[i]=NULL;
for(unsigned int i=0;i<96;i++)
bold[i]=NULL;
for(unsigned int i=0;i<32;i++)
metas[i]=NULL;
nlids=0;
lids=NULL;
string ligatures=null_string();
string kfar=make_string(PREFIX"/share/fonts/");
append_str(&kfar, font);
append_str(&kfar, ".termkf");
FILE *kfa=fopen(kfar.buf, "r");
if(!kfa)
{
fprintf(stderr, "termk: fopen: %s.termkf: %s\n", font, strerror(errno));
return(EXIT_FAILURE);
}
kf_archive kfb;
if(kf_read(kfa, &kfb)<0)
{
fprintf(stderr, "termk: kf_read failed\n");
return(EXIT_FAILURE);
}
fclose(kfa);
for(unsigned int i=0;i<kfb.nents;i++)
{
unsigned char j;
if(sscanf(kfb.ents[i].name.buf, "as_%hhu.pbm", &j)==1)
{
if((j>=31)&&(j<128))
{
if(!(letters[j-32]=pbm_string(kfb.ents[i].data)))
{
fprintf(stderr, "termk: bad as/%s\n", kfb.ents[i].name.buf);
return(EXIT_FAILURE);
}
}
else
{
fprintf(stderr, "termk: bad as/%s\n", kfb.ents[i].name.buf);
return(EXIT_FAILURE);
}
}
else if(sscanf(kfb.ents[i].name.buf, "bo_%hhu.pbm", &j)==1)
{
if((j>=31)&&(j<128))
{
if(!(bold[j-32]=pbm_string(kfb.ents[i].data)))
{
fprintf(stderr, "termk: bad bo/%s\n", kfb.ents[i].name.buf);
return(EXIT_FAILURE);
}
}
else
{
fprintf(stderr, "termk: bad bo/%s\n", kfb.ents[i].name.buf);
return(EXIT_FAILURE);
}
}
else if(sscanf(kfb.ents[i].name.buf, "ma_%hhu.pbm", &j)==1)
{
if((j>=96)&&(j<128))
{
if(!(metas[j-96]=pbm_string(kfb.ents[i].data)))
{
fprintf(stderr, "termk: bad ma/%s\n", kfb.ents[i].name.buf);
return(EXIT_FAILURE);
}
}
else
{
fprintf(stderr, "termk: bad ma/%s\n", kfb.ents[i].name.buf);
return(EXIT_FAILURE);
}
}
else if(strncmp(kfb.ents[i].name.buf, "li_", 3)==0)
{
char *dot=strrchr(kfb.ents[i].name.buf, '.');
if(dot)
{
lid l;
l.bold=false;
*dot=0;
l.name=strdup(kfb.ents[i].name.buf+3);
*dot='.';
if(!(l.data=pbm_string(kfb.ents[i].data)))
{
free(l.name);
fprintf(stderr, "termk: bad li/%s\n", kfb.ents[i].name.buf);
return(EXIT_FAILURE);
}
unsigned int n=nlids++;
lid *nl;
if(!(nl=realloc(lids, nlids*sizeof(lid))))
{
free(l.name);
free(l.data);
perror("termk: realloc");
return(EXIT_FAILURE);
}
(lids=nl)[n]=l;
}
else
{
fprintf(stderr, "termk: bad li/%s\n", kfb.ents[i].name.buf);
return(EXIT_FAILURE);
}
}
else if(strncmp(kfb.ents[i].name.buf, "lb_", 3)==0)
{
char *dot=strrchr(kfb.ents[i].name.buf, '.');
if(dot)
{
lid l;
l.bold=true;
*dot=0;
l.name=strdup(kfb.ents[i].name.buf+3);
*dot='.';
if(!(l.data=pbm_string(kfb.ents[i].data)))
{
free(l.name);
fprintf(stderr, "termk: bad li/%s\n", kfb.ents[i].name.buf);
return(EXIT_FAILURE);
}
unsigned int n=nlids++;
lid *nl;
if(!(nl=realloc(lids, nlids*sizeof(lid))))
{
free(l.name);
free(l.data);
perror("termk: realloc");
return(EXIT_FAILURE);
}
(lids=nl)[n]=l;
}
else
{
fprintf(stderr, "termk: bad li/%s\n", kfb.ents[i].name.buf);
return(EXIT_FAILURE);
}
}
else if(strcmp(kfb.ents[i].name.buf, "ligatures")==0)
{
ligatures=dup_string(kfb.ents[i].data);
}
else if(strcmp(kfb.ents[i].name.buf, "scores")==0)
{
k=kern_init_s(kfb.ents[i].data, true);
}
}
kf_free(kfb);
nligs=0;
ligs=NULL;
if(ligatures.i)
{
unsigned int i=0;
while(i<ligatures.i)
{
lig l;
l.what[0]=ligatures.buf[i++];
if(i==ligatures.i)
{
fprintf(stderr, "termk: bad ligatures file\n");
return(EXIT_FAILURE);
}
l.spa[0]=ligatures.buf[i++];
if(l.spa[0]=='-') l.spa[0]=-1;
else if(l.spa[0]=='.') l.spa[0]=0;
else if(l.spa[0]=='+') l.spa[0]=1;
if(i==ligatures.i)
{
fprintf(stderr, "termk: bad ligatures file\n");
return(EXIT_FAILURE);
}
l.what[1]=ligatures.buf[i++];
if(i==ligatures.i)
{
fprintf(stderr, "termk: bad ligatures file\n");
return(EXIT_FAILURE);
}
l.spa[1]=ligatures.buf[i++];
if(l.spa[1]=='-') l.spa[1]=-1;
else if(l.spa[1]=='.') l.spa[1]=0;
else if(l.spa[1]=='+') l.spa[1]=1;
if(i==ligatures.i)
{
fprintf(stderr, "termk: bad ligatures file\n");
return(EXIT_FAILURE);
}
l.what[2]=ligatures.buf[i++];
if(i==ligatures.i)
{
fprintf(stderr, "termk: bad ligatures file\n");
return(EXIT_FAILURE);
}
if(ligatures.buf[i++]!=' ')
{
if((ligatures.buf[i-1]=='\n')&&(l.what[1]>=32)&&(l.what[1]<128))
{
(l.data=letters[l.what[1]-32])->refcount++;
unsigned int n=nligs++;
lig *nl=realloc(ligs, nligs*sizeof(lig));
if(!nl)
{
SDL_FreeSurface(l.data);
perror("termk: realloc");
return(EXIT_FAILURE);
}
(ligs=nl)[n]=l;
continue;
}
else
{
fprintf(stderr, "termk: bad ligatures file\n");
return(EXIT_FAILURE);
}
}
if(i==ligatures.i)
{
fprintf(stderr, "termk: bad ligatures file\n");
return(EXIT_FAILURE);
}
unsigned int tl=strcspn(ligatures.buf+i, "\n"), j;
for(j=0;j<nlids;j++)
{
if(lids[j].bold) continue;
if(strlen(lids[j].name)!=tl) continue;
if(strncmp(ligatures.buf+i, lids[j].name, tl)==0) break;
}
if(j<nlids)
{
(l.data=lids[j].data)->refcount++;
}
else
{
fprintf(stderr, "termk: ligatures: %.*s not found\n", tl, ligatures.buf+i);
return(EXIT_FAILURE);
}
for(j=0;j<nlids;j++)
{
if(!lids[j].bold) continue;
if(strlen(lids[j].name)!=tl) continue;
if(strncmp(ligatures.buf+i, lids[j].name, tl)==0) break;
}
if(j<nlids)
(l.bold=lids[j].data)->refcount++;
else
l.bold=NULL;
i+=tl;
unsigned int n=nligs++;
lig *nl=realloc(ligs, nligs*sizeof(lig));
if(!nl)
{
SDL_FreeSurface(l.data);
perror("termk: realloc");
return(EXIT_FAILURE);
}
(ligs=nl)[n]=l;
if(i<ligatures.i) i++;
}
}
free_string(&ligatures);
for(unsigned int i=0;i<nlids;i++)
{
free(lids[i].name);
SDL_FreeSurface(lids[i].data);
}
if(!k)
{
fprintf(stderr, "termk: kern_init failed\n");
return(EXIT_FAILURE);
}
if(letters[0])
{
fsiz.y=letters[0]->h;
fsiz.x=letters[0]->w+1;
}
terminal t;
if(initterm(&t, 256, 24, wide?132:80)) return(EXIT_FAILURE);
SDL_Surface *screen=ginit(8+t.cols*fsiz.x, 4+t.rows*fsiz.y, 32);
if(!screen)
{
fprintf(stderr, "termk: ginit failed: %s\n", SDL_GetError());
return(EXIT_FAILURE);
}
int ptmx=open("/dev/ptmx", O_RDWR);
if(!ptmx)
{
perror("open");
return(EXIT_FAILURE);
}
if(grantpt(ptmx))
{
perror("grantpt");
return(EXIT_FAILURE);
}
if(unlockpt(ptmx))
{
perror("unlockpt");
return(EXIT_FAILURE);
}
pid_t pid=fork();
switch(pid)
{
case -1: // error
perror("fork");
return(EXIT_FAILURE);
break;
case 0: // child
setsid();
setenv("TERM", term, 1);
char val[16];
snprintf(val, 16, "%u", t.rows);
setenv("LINES", val, 1);
snprintf(val, 16, "%u", t.cols);
setenv("COLUMNS", val, 1);
char *pts=ptsname(ptmx);
if(!pts)
{
perror("ptsname");
return(EXIT_FAILURE);
}
int ptsfd=open(pts, O_RDWR);
if(!ptsfd)
{
perror("open");
return(EXIT_FAILURE);
}
if(dup2(ptsfd, STDIN_FILENO)==-1)
{
perror("dup2 in");
return(EXIT_FAILURE);
}
if(dup2(ptsfd, STDOUT_FILENO)==-1)
{
perror("dup2 out");
return(EXIT_FAILURE);
}
if(dup2(ptsfd, STDERR_FILENO)==-1)
{
perror("dup2 err");
return(EXIT_FAILURE);
}
execvp(program, argp);
// if we get here, execvp failed
perror("execvp");
return(EXIT_FAILURE);
break;
default: // parent
break;
}
Display *dpy = XOpenDisplay(NULL);
if(!dpy)
fprintf(stderr, "termk: failed to open X display, no ^G bell\n");
fd_set master, readfds;
FD_ZERO(&master);
FD_SET(ptmx, &master);
int fdmax=ptmx;
struct timeval tv;
SDL_FillRect(screen, &(SDL_Rect){0, 0, screen->w, screen->h}, SDL_MapRGB(screen->format, black?255:0, black?255:0, black?255:0));
SDL_Flip(screen);
SDL_WM_SetCaption(t.statusline, t.statusline);
SDL_EnableUNICODE(1);
SDL_EnableKeyRepeat(SDL_DEFAULT_REPEAT_DELAY, SDL_DEFAULT_REPEAT_INTERVAL);
SDL_Event event;
bool do_update=true;
int since_update=0;
int idle=0;
int errupt=0;
while(!errupt)
{
readfds=master;
tv.tv_sec=0;
tv.tv_usec=do_update?0:25000+(idle*1000);
if(idle<475)
idle++;
if(select(fdmax+1, &readfds, NULL, NULL, &tv)==-1)
{
if(errno!=EINTR) // nobody cares if select() was interrupted by a signal
{
perror("select");
errupt++;
}
}
else
{
if((FD_ISSET(ptmx, &readfds))&&(since_update++<SINCE_LIMIT))
{
char c;
ssize_t b=read(ptmx, &c, 1);
if(b==0)
{
fprintf(stderr, "termk: EOF, unexpectedly (program exit)\n");
kill(pid, SIGKILL);
return(EXIT_SUCCESS);
}
else if(b<0) // this is what happens when the child closes
{
if(errno!=EIO)
perror("read");
kill(pid, SIGKILL);
return(EXIT_SUCCESS);
}
else
{
unsigned long uc=0;
if(t.esc)
{
if((c==0x18)||(c==0x1a)) // CAN, SUB cancel escapes (and, not entirely correctly, UTF8)
{
fprintf(stderr, "termk: cancelled ESC:");
for(unsigned int i=0;i<t.esc;i++)
fprintf(stderr, " %02x", t.escd[i]);
fputc('\n', stderr);
t.esc=0;
c=0x7f; // replacement character
goto do_print;
}
else if(t.esc<256)
{
t.escd[t.esc++]=c;
if(t.escd[0]==0x1b)
{
if(t.esc==2)
{
switch(c)
{
case 'A': // cursor up
if(t.cur.y>(t.nlines-t.rows)) t.cur.y--;
t.esc=0;
break;
case 'B': // cursor down
cdown(&t);
t.esc=0;
break;
case 'C': // cursor right
cright(&t, false);
t.esc=0;
break;
case 'D': // cursor left
if(t.cur.x) t.cur.x--;
t.esc=0;
break;
case 'F': // set Graphics Mode
t.meta=true;
t.esc=0;
break;
case 'G': // reset Graphics Mode
t.meta=false;
t.esc=0;
break;
case 'H': // cursor to home position
t.cur.x=0;
t.cur.y=t.nlines-t.rows;
t.esc=0;
break;
case 'I': // reverse line feed
for(unsigned int i=t.nlines-1;i>0;i--)
{
memcpy(t.text[i], t.text[i-1], t.cols);
memcpy(t.at[i], t.at[i-1], t.cols*sizeof(attr));
memcpy(t.dev[i], t.dev[i-1], t.cols);
t.dirty[i][0]=t.dirty[i-1][0];
t.dirty[i][1]=true;
}
t.dirty[0][0]=false;
t.dirty[0][1]=true;
memset(t.text[0], ' ', t.cols);
for(unsigned int i=0;i<=t.cols;i++)
t.at[0][i]=t.sgr;
memset(t.dev[0], 0, t.cols+1);
t.esc=0;
break;
case 'J': // clear to end of screen
{
unsigned int y=t.cur.y,x=t.cur.x;
while(y<t.nlines)
{
while(x<t.cols)
{
t.text[y][x]=' ';
t.at[y][x]=t.sgr;
x++;
}
x=0;
t.dirty[y++][0]=true;
}
}
t.esc=0;
break;
case 'K': // clear to end of line
{
unsigned int x=t.cur.x;
while(x<t.cols)
{
t.text[t.cur.y][x]=' ';
t.at[t.cur.y][x]=t.sgr;
x++;
}
t.dirty[t.cur.y][0]=true;
}
t.esc=0;
break;
case 'Y': // cursor move (takes 2 more bytes)
// nothing
break;
case 'Z': // Identify
do_write(ptmx, "\033/Z"); // "I'm a VT52"
t.esc=0;
break;
case '(': // termk extensions
// fetch the rest
break;
case '[':
// suck it up, it's not a vt52 sequence but the sending application doesn't know what it's doing
break;
default:
fprintf(stderr, "termk: unknown ESC:");
for(unsigned int i=0;i<t.esc;i++)
fprintf(stderr, " %02x", t.escd[i]);
fputc('\n', stderr);
t.esc=0;
c=0x7f; // replacement character
goto do_print;
break;
}
}
else
{
switch(t.escd[1])
{
case 'Y': // cursor move (takes 2 more bytes)
if(t.esc==4)
{
// ESC Y Ps Ps, cursor move
t.cur.y=min(max(t.escd[2]-32, 0), t.rows-1)+t.nlines-t.rows;
t.cur.x=min(max(t.escd[3]-32, 0), t.cols-1);
t.esc=0;
}
break;
case '[': // broken non-vt52 sequence ^[[m sent by some errant programs
if(c=='m')
t.esc=0;
break;
case '(': // termk extensions
if(c==')')
{
t.escd[t.esc-1]=0;
const char *escape=t.escd+2;
if(strcmp(escape, "clr_bol")==0)
{
if(clr_bol)
{
unsigned int x=t.cur.x;
while(x)
{
x--;
t.text[t.cur.y][x]=' ';
t.at[t.cur.y][x]=t.sgr;
}
t.dirty[t.cur.y][0]=true;
}
}
else if(strcmp(escape, "save_cursor")==0)
{
if(save_cursor)
t.save=t.cur;
}
else if(strcmp(escape, "restore_cursor")==0)
{
if(restore_cursor)
{
t.dirty[t.cur.y][1]=true;
t.dirty[(t.cur=t.save).y][1]=true;
}
}
else if(strcmp(escape, "to_status_line")==0)
{
if(has_status_line&&to_status_line&&!t.status)
{
t.status=true;
t.statusp=0;
}
}
else if(strcmp(escape, "from_status_line")==0)
{
if(has_status_line&&from_status_line&&t.status)
{
t.status=false;
t.statusline[t.statusp]=0;
SDL_WM_SetCaption(t.statusline, t.statusline);
}
}
else if(strcmp(escape, "dis_status_line")==0)
{
if(has_status_line&&dis_status_line)
{
t.statusp=0;
t.statusline[t.statusp]=0;
SDL_WM_SetCaption("termk", "termk");
}
}
else if(strcmp(escape, "exit_attribute_mode")==0)
{
if(exit_attribute_mode)
t.sgr=DEFAULT_ATTR;
}
else if(strcmp(escape, "enter_bold_mode")==0)
{
if(enter_bold_mode)
t.sgr.bold=true;
}
else if(strcmp(escape, "enter_reverse_mode")==0)
{
if(enter_reverse_mode)
t.sgr.revvid=true;
}
else if(strncmp(escape, "set_foreground:", 15)==0)
{
if(set_foreground)
if(!sscanf(escape+15, "%hhu", &t.sgr.fore))
fprintf(stderr, "termk: bad set_foreground:%s\n", escape+15);
}
else if(strncmp(escape, "set_background:", 15)==0)
{
if(set_background)
if(!sscanf(escape+15, "%hhu", &t.sgr.back))
fprintf(stderr, "termk: bad set_background:%s\n", escape+15);
}
else
{
fprintf(stderr, "termk: unknown (escape): %s\n", escape);
}
t.esc=0;
}
break;
}
}
}
else // it's UTF8
{
if(t.esc>1)
{
if((c&0xC0)!=0x80)
{
t.esc=0;
c=0x7f; // replacement character
goto do_print;
}
if((t.escd[0]&0xE0)==0xC0)
{
if(t.esc==2)
{
t.esc=0;
uc=((t.escd[0]&0x1F)<<6)|(t.escd[1]&0x3F);
goto do_print;
}
}
else if((t.escd[0]&0xF0)==0xE0)
{
if(t.esc==3)
{
t.esc=0;
uc=((t.escd[0]&0x0F)<<12)|((t.escd[1]&0x3F)<<6)|(t.escd[2]&0x3F);
goto do_print;
}
}
else if((t.escd[0]&0xF8)==0xF0)
{
if(t.esc==4)
{
t.esc=0;
uc=((t.escd[0]&0x07)<<18)|((t.escd[1]&0x3F)<<12)|((t.escd[2]&0x3F)<<6)|(t.escd[3]&0x3F);
goto do_print;
}
}
else
{
c=0x7f;
goto do_print;
}
}
}
}
}
else if((signed char)c<0)
{
if((c&0xC0)==0x80)
{
c=0x7f;
goto do_print;
}
else if(((c&0xE0)==0xC0)||((c&0xF0)==0xE0)||((c&0xF8)==0xF0))
{
t.esc=1;
t.escd[0]=c;
}
else
{
c=0x7f;
goto do_print;
}
}
else if(c<0x20)
{
switch(c)
{
case 7: // BEL
if(dpy)
XBell(dpy, 100);
break;
case 8: // BS
if(t.cur.x) t.cur.x--;
break;
case 9: // HT
cright(&t, false);
while((t.cur.x&7) && cright(&t, false));
break;
case 0xa: // LF
case 0xb: // VT
case 0xc: // FF
t.cur.x=0;
cdown(&t);
break;
case 0xd: // CR
t.cur.x=0;
break;
case 0x1b:
t.esc=1;
t.escd[0]=c;
break;
}
}
else
{
do_print:
if(t.status)
{
if(t.statusp<81)
{
t.statusline[t.statusp++]=uc?0x7f:c;
t.statusline[t.statusp]=0;
}
}
else if(uc)
{
t.text[t.cur.y][t.cur.x]=0x7f;
t.at[t.cur.y][t.cur.x]=t.sgr;
t.dirty[t.cur.y][0]=true;
cright(&t, terminfo?auto_right_margin:false);
}
else
{
t.text[t.cur.y][t.cur.x]=t.meta?c|0x80:c;
t.at[t.cur.y][t.cur.x]=t.sgr;
t.dirty[t.cur.y][0]=true;
cright(&t, terminfo?auto_right_margin:false);
}
}
}
do_update=true;
t.scroll=0;
idle=0;
}
else
{
since_update=0;
for(unsigned int i=0;i<t.rows;i++)
{
unsigned int j=t.nlines+i-t.rows-t.scroll;
if(t.dirty[j][0])
{
kern(t.text[j], t.dev[j], k);
#if 0 // for debugging