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asc.c
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1994-02-02
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6KB
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305 lines
/********************************************************************
PopASC (c) Copyright 1992-94 by Omega Point, Inc.
*********************************************************************/
#include "cr.h"
/***********************************************************
RESIDENT VARIABLES & DEFINITIONS
************************************************************/
extern word _hkey_again; /* Set to NZ if another hot-key hit. */
#define MOVABLE_WINDOW (0) /* Set to 1 if window movable */
#define DX1 (7)
#define DY (18)
#define NC (4)
#define DX (NC*DX1+1)
#define DXC (4*8+2)
#define BLK_SZ (DXC*DY)
#define MAX_PG (16)
word saved_scr[BLK_SZ]; /* Keep foreground screen here */
int x0=16,y0=4; /* Box position */
int sdx=DX,sdy=DY;
int cur_page;
int sel_let,sel_x=0,sel_y=0;
int pref_let='P'-0x40;
int max_x,max_y;
char pref_on=0,color_chart=0;
byte atr_fram=0x19,atr_dec=0x1b,atr_hex=0x1b,sel_atr=0x4e;
byte atr_txt[]={0x1e,0x1f};
/* Last ASCII page - graphics characters in logical order */
byte gc[64]={\
g1_c1,g1_t4,g1_c4, g2_c1,g2_t4,g2_c4, g21_c1,g21_t4,g21_c4, g12_c1,g12_t4,g12_c4,
0xfe,0xb0,0x07,0xf9,
g1_t1,g1_cr,g1_t3, g2_t1,g2_cr,g2_t3, g21_t1,g21_cr,g21_t3, g12_t1,g12_cr,g12_t3,
0x16,0xb1,0x04,0xdc,
g1_c2,g1_t2,g1_c3, g2_c2,g2_t2,g2_c3, g21_c2,g21_t2,g21_c3, g12_c2,g12_t2,g12_c3,
0xae,0xb2,0xf0,0xdf,
g1_ver,g1_hor,g2_ver,g2_hor, 0x11,0x10,0x1e,0x1f, 0x1b,0x1a,0x18,0x19,
0xaf,0xdd,0xde,0xdb};
#define TOP_FR (0xdb)
#define BOT_FR (0xdb)
char tmp[5]="1234";
send_key()
{
if (pref_on)
stuff_key(pref_let);
stuff_key(sel_let);
}
/* Show COLOR CHART */
show_colors()
{ register char *s=tmp+1;
int m,i,j,xs;
*((dword*)tmp)=0x20202020L; m=0;
xs=x0-4+1;
for (j=0; j<8; j++)
{
xs+= 4; crs_y=y0;
for (i=0; i<16; i++,m++)
{
crs_x=xs; crs_y++;
vid_atr=m;
b2hex(m,s); dsp(s-1);
}
}
}
show_sel()
{ int i;
crs_x=sel_x*DX1+x0+4;
crs_y=sel_y+y0+1;
hor_atr(3);
i=((sel_x<<4)|sel_y)&0xff;
if (cur_page==MAX_PG) sel_let=gc[i];
else sel_let=(cur_page<<4)|i;
}
mov_sel(dx,dy)
{
if (color_chart) return;
vid_atr=atr_txt[sel_x&1];
show_sel();
sel_x+=dx;
if (sel_x>=NC) sel_x=0;
else if (sel_x<0) sel_x=NC-1;
sel_y+=dy;
if (sel_y>=16) sel_y=0;
else if (sel_y<0) sel_y=15;
}
show_frame()
{ int i,j;
crs_x=x0; crs_y=y0;
vid_atr=atr_fram;
if (color_chart)
{
dsp_box(DXC,DY,'█');
return;
}
dsp_hor(TOP_FR,DX);
for (i=0,crs_y++,crs_x=x0; i<16;i++)
{
dsp("▌");
for (j=0; j<NC; j++) dsp(" │ │");
crs_x--;dsp("▐");
crs_x=x0; crs_y++;
}
dsp_hor(BOT_FR,DX);
}
/*** SHOW ASCII CHART ***/
show_page()
{
int i,c,j,n1,n0,m,xs=x0+1,gr=0;
register char *s=tmp;
if (cur_page>MAX_PG) cur_page=0;
else if (cur_page<0) cur_page=MAX_PG;
if (cur_page<MAX_PG) m=(cur_page/NC)*NC;
else {m=0; gr=1;}
if (color_chart)
{
show_colors();
return;
}
for (j=0; j<NC; j++)
{
n0=((m+j)<<4);
n1=n0+16;
crs_y=y0+1;
for (i=n0; i<n1; i++)
{
crs_x=xs; vid_atr=atr_hex;
c = gr ? gc[i]:i;
b2hex(c,(char*)s); s[2]=0; dsp((char*)s);
crs_x+=2;
vid_atr=atr_txt[i&1];
dsp_chr(c); crs_y++;
}
xs+=DX1;
}
}
#if MOVABLE_WINDOW
move_pg(x1,y1)
{
crs_x=x0; crs_y=y0;
put_blk(sdx,sdy,saved_scr);
crs_x=x1; crs_y=y1;
get_blk(sdx,sdy,saved_scr);
x0=x1; y0=y1;
show_frame();
show_page();
}
#endif
tog_col_chart()
{
crs_x=x0; crs_y=y0;
put_blk(sdx,sdy,saved_scr);
color_chart^=1;
if (! color_chart)
{
sdx=DX; sdy=DY;
}
else
{
sdx=DXC; sdy=DY;
}
set_max_xy();
crs_x=x0; crs_y=y0;
get_blk(sdx,sdy,saved_scr);
show_frame();
}
full_key()
{ word k;
while (! anykey())
if (_hkey_again)
{
_hkey_again=0;
return(-1);
}
k=pckey();
if (k<K_NUMPAD)
if (k&0xff)
{
k&=0xff;
if (k>='a')
if (k<='z') k-=0x20;
}
return(k);
}
set_max_xy()
{
max_x=scr_width-sdx;
max_y=scr_len-sdy;
if (x0>max_x) x0=max_x;
if (y0>max_y) y0=max_y;
}
show_chart()
{ word k;
show_frame(); /* Show ASCII chart frame & titles */
while (1) {
show_page(); /* Show current page */
if (!color_chart)
{
vid_atr=sel_atr;
show_sel();
}
k=full_key();
switch (k) {
case K_PGUP: cur_page-=NC; break;
case K_PGDN: cur_page+=NC; break;
case K_UP: mov_sel(0,-1);break;
case K_DN: mov_sel(0,+1);break;
case K_LEFT: mov_sel(-1,0);break;
case K_RIGHT: mov_sel(+1,0);break;
case K_HOME: mov_sel(0,-3);break;
case K_END: mov_sel(0,+3);break;
/* -- Makes box movable with Shift-Cursor keys --*/
#if MOVABLE_WINDOW
case SK_UP: move_pg(x0,y0>0?y0-1:max_y);
break;
case SK_DN: move_pg(x0,y0<max_y?y0+1:0);
break;
case SK_LEFT: move_pg(x0>0?x0-1:max_x,y0);
break;
case SK_RIGHT: move_pg(x0<max_x?x0+1:0,y0);
break;
#endif
case 0x20: tog_col_chart();
break;
case K_INS: pref_on=1;send_key();
return;
case 0xd: pref_on=0;
send_key();
case -1:
case 0x1B: return;
}
}
}
/** Save/Restore foreground screen **/
chg_scr(func)
fp func;
{
crs_x=x0; crs_y=y0;
(*func)(sdx,sdy,saved_scr);
}
/** RESIDENT CODE HOT-KEY LIST **/
word hk_list[]={K_RC,M_LC+0x39,SC_F12,M_LA+0x34,0};
/***********************************************************
MAIN INTERRUPT SERVICE FUNCTION FOR HOT-KEYS
************************************************************/
isr(hk)
{
if ((hk==hk_list[2])||(hk==hk_list[3])) send_key();
else
{
_hkey_again=0; /* Re-enable sensing of hot-key from within */
chk_video(); /* Obtain screen width, cursor pos */
set_max_xy(); /* Calculate box movement boundaries */
chg_scr(get_blk); /* Save foreground screen */
show_chart(); /* Go display ASCII/Color chart */
chg_scr(put_blk); /* Restore foreground screen */
}
}