path: root/mbbsd/screen.c

/* $Id: screen.c,v 1.2 2002/04/27 15:50:17 in2 Exp $ */
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <stdarg.h>
#include <sys/types.h>
#include "config.h"
#include "pttstruct.h"
#include "common.h"
#include "proto.h"

extern int t_lines, t_columns;  /* Screen size / width */
extern int b_lines;             /* Screen bottom line number: t_lines-1 */
extern int p_lines;             /* a Page of Screen line numbers: tlines-4 */
extern int showansi;

extern char *clearbuf;
extern char *cleolbuf;
extern char *scrollrev;
extern char *strtstandout;
extern char *endstandout;
extern int clearbuflen;
extern int cleolbuflen;
extern int scrollrevlen;
extern int strtstandoutlen;
extern int endstandoutlen;
extern int automargins;
#ifdef SUPPORT_GB    
static int current_font_type=TYPE_BIG5;
static int gbinited=0;
#endif
#define SCR_WIDTH       80 
#define o_clear()     output(clearbuf,clearbuflen)
#define o_cleol()     output(cleolbuf,cleolbuflen)
#define o_scrollrev() output(scrollrev,scrollrevlen)
#define o_standup()   output(strtstandout,strtstandoutlen)
#define o_standdown() output(endstandout,endstandoutlen)

unsigned char scr_lns, scr_cols;
static unsigned char cur_ln = 0, cur_col = 0;
static unsigned char docls, downfrom = 0;
static unsigned char standing = NA;
static char roll = 0;
static int scrollcnt, tc_col, tc_line;

screenline_t *big_picture = NULL;

#define MODIFIED (1)            /* if line has been modifed, screen output */
#define STANDOUT (2)            /* if this line has a standout region */

int tputs(const char *str, int affcnt, int (*putc)(int));

void initscr() {
    if(!big_picture) {
    scr_lns = t_lines;
    scr_cols = t_columns = ANSILINELEN;
    /* scr_cols = MIN(t_columns, ANSILINELEN); */
    big_picture = (screenline_t *) calloc(scr_lns, sizeof(screenline_t));
    docls = YEA;
    }
}

void move(int y, int x) {
    cur_col = x;
    cur_ln = y;
}

void getyx(int *y, int *x) {
    *y = cur_ln;
    *x = cur_col;
}

static void rel_move(int was_col, int was_ln, int new_col, int new_ln) {
    if(new_ln >= t_lines || new_col >= t_columns)
    return;

    tc_col = new_col;
    tc_line = new_ln;
    if(new_col == 0) {
    if(new_ln == was_ln) {
        if(was_col)
        ochar('\r');
        return;
    } else if(new_ln == was_ln + 1) {
        ochar('\n');
        if(was_col)
        ochar('\r');
        return;
    }
    }

    if(new_ln == was_ln) {
    if(was_col == new_col)
        return;

    if(new_col == was_col - 1) {
        ochar(Ctrl('H'));
        return;
    }
    }
    do_move(new_col, new_ln);
}

static void standoutput(char *buf, int ds, int de, int sso, int eso) {
    int st_start, st_end;
    
    if(eso <= ds || sso >= de) {
    output(buf + ds, de - ds);
    } else {
    st_start = MAX(sso, ds);
    st_end = MIN(eso, de);
    if(sso > ds)
        output(buf + ds, sso - ds);
    o_standup();
    output(buf + st_start, st_end - st_start);
    o_standdown();
    if(de > eso)
        output(buf + eso, de - eso);
    }
}

void redoscr() {
    register screenline_t *bp;
    register int i, j, len;

    o_clear();
    for(tc_col = tc_line = i = 0, j = roll; i < scr_lns; i++, j++) {
    if(j >= scr_lns)
        j = 0;
    bp = &big_picture[j];
    if((len = bp->len)) {
        rel_move(tc_col, tc_line, 0, i);
        if(bp->mode & STANDOUT)
        standoutput((char *)bp->data, 0, len, bp->sso, bp->eso);
        else
        output((char *)bp->data, len);
        tc_col += len;
        if(tc_col >= t_columns) {
        if (automargins)
            tc_col = t_columns - 1;
        else {
            tc_col -= t_columns;
            tc_line++;
            if(tc_line >= t_lines)
            tc_line = b_lines;
        }
        }
        bp->mode &= ~(MODIFIED);
        bp->oldlen = len;
    }
    }
    rel_move(tc_col, tc_line, cur_col, cur_ln);
    docls = scrollcnt = 0;
    oflush();
}

void refresh() {
    register screenline_t *bp = big_picture;
    register int i, j, len;
    extern int automargins;
    extern int scrollrevlen;
    if(num_in_buf())
    return;

    if((docls) || (abs(scrollcnt) >= (scr_lns - 3))) {
    redoscr();
    return;
    }

    if(scrollcnt < 0) {
    if(!scrollrevlen) {
        redoscr();
        return;
    }
    rel_move(tc_col, tc_line, 0, 0);
    do {
        o_scrollrev();
    } while(++scrollcnt);
    } else if (scrollcnt > 0) {
    rel_move(tc_col, tc_line, 0, b_lines);
    do {
        ochar('\n');
    } while(--scrollcnt);
    }

    for(i = 0, j = roll; i < scr_lns; i++, j++) {
    if(j >= scr_lns)
        j = 0;
    bp = &big_picture[j];
    len = bp->len;
    if(bp->mode & MODIFIED && bp->smod < len) {
        bp->mode &= ~(MODIFIED);
        if(bp->emod >= len)
        bp->emod = len - 1;
        rel_move(tc_col, tc_line, bp->smod, i);

        if(bp->mode & STANDOUT)
        standoutput((char *)bp->data, bp->smod, bp->emod + 1,
                bp->sso, bp->eso);
        else
        output((char *)&bp->data[bp->smod], bp->emod - bp->smod + 1);
        tc_col = bp->emod + 1;
        if(tc_col >= t_columns) {
        if(automargins) {
            tc_col -= t_columns;
            if(++tc_line >= t_lines)
            tc_line = b_lines;
        } else
            tc_col = t_columns - 1;
        }
    }
    
    if(bp->oldlen > len) {
        rel_move(tc_col, tc_line, len, i);
        o_cleol();
    }
    bp->oldlen = len;

    }

    rel_move(tc_col, tc_line, cur_col, cur_ln);

    oflush();
}

void clear() {
    register screenline_t *slp;

    register int i;

    docls = YEA;
    cur_col = cur_ln = roll = downfrom = i = 0;
    do {
    slp = &big_picture[i];
    slp->mode = slp->len = slp->oldlen = 0;
    } while(++i < scr_lns);
}

void clrtoeol() {
    register screenline_t *slp;
    register int ln;

    standing = NA;
    if((ln = cur_ln + roll) >= scr_lns)
    ln -= scr_lns;
    slp = &big_picture[ln];
    if(cur_col <= slp->sso)
    slp->mode &= ~STANDOUT;

    if(cur_col > slp->oldlen) {
    for(ln = slp->len; ln <= cur_col; ln++)
        slp->data[ln] = ' ';
    }

    if(cur_col < slp->oldlen) {
    for(ln = slp->len; ln >= cur_col; ln--)
        slp->data[ln] = ' ';
    }
    
    slp->len = cur_col;
}

void clrtoline(int line) {
    register screenline_t *slp;
    register int i, j;

    for(i = cur_ln, j = i + roll; i < line; i++, j++) {
    if(j >= scr_lns)
        j -= scr_lns;
    slp = &big_picture[j];
    slp->mode = slp->len = 0;
    if(slp->oldlen)
        slp->oldlen = 255;
    }
}     

void clrtobot() {
    clrtoline(scr_lns);
}

void outch(unsigned char c) {
    register screenline_t *slp;
    register int i;

    if((i = cur_ln + roll) >= scr_lns)
    i -= scr_lns;
    slp = &big_picture[i];
 
    if(c == '\n' || c == '\r') {
    if(standing) {
        slp->eso = MAX(slp->eso, cur_col);
        standing = NA;
    }
    if((i = cur_col - slp->len) > 0)
        memset(&slp->data[slp->len], ' ', i + 1);
    slp->len = cur_col;
    cur_col = 0;
    if(cur_ln < scr_lns)
        cur_ln++;
    return;
    }
/*
  else if(c != '\033' && !isprint2(c))
  {
  c = '*'; //substitute a '*' for non-printable 
  }
*/
    if(cur_col >= slp->len) {
    for(i = slp->len; i < cur_col; i++)
        slp->data[i] = ' ';
    slp->data[cur_col] = '\0';
    slp->len = cur_col + 1;
    }

    if(slp->data[cur_col] != c) {
    slp->data[cur_col] = c;
    if((slp->mode & MODIFIED) != MODIFIED)
        slp->smod = slp->emod = cur_col;
    slp->mode |= MODIFIED;
    if(cur_col > slp->emod)
        slp->emod = cur_col;
    if(cur_col < slp->smod)
        slp->smod = cur_col;
    }

    if (++cur_col >= scr_cols)
    {
    if (standing && (slp->mode & STANDOUT))
    {
        standing = 0;
        slp->eso = MAX(slp->eso, cur_col);
    }
    cur_col = 0;
    if (cur_ln < scr_lns)
        cur_ln++;
    }             

}

static void parsecolor(char *buf) {
    char *val;
    char data[24];
    
    data[0] = '\0';
    val = (char *)strtok(buf, ";");

    while(val) {
    if(atoi(val) < 30) {
        if(data[0])
        strcat(data, ";");
        strcat(data, val);
    }
    val = (char *) strtok(NULL, ";");
    }
    strcpy(buf, data);
}

#define NORMAL (00)
#define ESCAPE (01)
#define VTKEYS (02)

void outc(unsigned char ch) {
    if(showansi)
    outch(ch);
    else {
    static char buf[24];
    static int p = 0;
    static int mode = NORMAL;
    int i;

    switch(mode) {
    case NORMAL:
        if(ch == '\033')
        mode = ESCAPE;
        else
        outch(ch);
        return;
    case ESCAPE:
        if(ch == '[')
        mode = VTKEYS;
        else {
        mode = NORMAL;
        outch('');
        outch(ch);
        }
        return;
    case VTKEYS:
        if(ch == 'm') {
        buf[p++] = '\0';
        parsecolor(buf);
        } else if((p < 24) && (not_alpha(ch))) {
        buf[p++] = ch;
        return;
        }
        if(buf[0]) {
        outch('');
        outch('[');

        for(i = 0; (p = buf[i]); i++)
            outch(p);
        outch(ch);
        }
        p = 0;
        mode = NORMAL;
    }
    }
}

static void do_outs(char *str) {
    while(*str)
    {
        outc(*str++);
    }
}          
#ifdef SUPPORT_GB    
static void gb_init()
{
    if(current_font_type == TYPE_GB)
    {
    hc_readtab(BBSHOME"/etc/hc.tab");
    }
    gbinited = 1;
}

static void gb_outs(char *str)
{
    do_outs(hc_convert_str(str, HC_BIGtoGB, HC_DO_SINGLE));
}             
#endif
int edit_outs(char *text) {
    register int column = 0;
    register char ch;
#ifdef SUPPORT_GB    
    if(current_font_type == TYPE_GB) 
    text = hc_convert_str(text, HC_BIGtoGB, HC_DO_SINGLE);
#endif
    while((ch = *text++) && (++column < SCR_WIDTH))
        outch(ch == 27 ? '*' : ch);

    return 0;
}                  

void outs(char *str) {
#ifdef SUPPORT_GB    
    if(current_font_type == TYPE_BIG5)
#endif
    do_outs(str);
#ifdef SUPPORT_GB    
    else
    {
    if(!gbinited) gb_init();
    gb_outs(str);
    }
#endif
}


/* Jaky */
void  Jaky_outs(char *str, int line) {
#ifdef SUPPORT_GB    
    if(current_font_type == TYPE_GB)
    str = hc_convert_str(str, HC_BIGtoGB, HC_DO_SINGLE);    
#endif
    while(*str && line) {
    outc(*str);
    if(*str=='\n')
        line--;
    str++;
    }
}

void outmsg(char *msg) {
    move(b_lines, 0);
    clrtoeol();
#ifdef SUPPORT_GB    
    if(current_font_type == TYPE_GB)
    msg = hc_convert_str(msg, HC_BIGtoGB, HC_DO_SINGLE);    
#endif
    while(*msg)
    outc(*msg++);
}

void prints(char *fmt, ...) {
    va_list args;
    char buff[1024];

    va_start(args, fmt);
    vsprintf(buff, fmt, args);
    va_end(args);
    outs(buff);
}

void mprints(int y, int x, char *str) {
    move(y, x);
    clrtoeol();
    prints(str);
} 

void scroll() {
    scrollcnt++;
    if(++roll >= scr_lns)
    roll = 0;
    move(b_lines, 0);
    clrtoeol();
}

void rscroll() {
    scrollcnt--;
    if(--roll < 0)
    roll = b_lines;
    move(0, 0);
    clrtoeol();
}

void region_scroll_up(int top, int bottom) {
    int i;

    if(top > bottom) {
    i = top; 
    top = bottom;
    bottom = i;
    }

    if(top < 0 || bottom >= scr_lns)
    return;

    for(i = top; i < bottom; i++)
    big_picture[i] = big_picture[i + 1];
    memset(big_picture + i, 0, sizeof(*big_picture));
    memset(big_picture[i].data, ' ', scr_cols);
    save_cursor();
    change_scroll_range(top, bottom);
    do_move(0, bottom);
    scroll_forward();
    change_scroll_range(0, scr_lns - 1);
    restore_cursor();
    refresh();
}

void standout() {
    if(!standing && strtstandoutlen) {
    register screenline_t *slp;

    slp = &big_picture[((cur_ln + roll) % scr_lns)];
    standing = YEA;
    slp->sso = slp->eso = cur_col;
    slp->mode |= STANDOUT;
    }
}

void standend() {
    if(standing && strtstandoutlen) {
    register screenline_t *slp;

    slp = &big_picture[((cur_ln + roll) % scr_lns)];
    standing = NA;
    slp->eso = MAX(slp->eso, cur_col);
    }
}