Free Hero Mesh

  Add a new level (after the last one). The new level has the same
  dimensions as the current level, but contains no objects or strings,
  and the title is set to "New Level".

'^S'
  Save level.

'^T'
  Edit the level title.

'^a' <location>
  Add an object with the current MRU values to that location, if there
  is not already another object of the same class there.

'^c'
  Display the class selection menu.

?.editKey.C: select 'lc',:level_code where :level_code=cast(:level_code as int);
?.editKey.F: with n(n) as (select 65 union all select n+1 h from n where h<=64*pfheight()+65) select '^a',n from n;
?.editKey.R: select 're',substr(:resize,1,instr(:resize,'x')-1),substr(:resize,instr(:resize,'x')+1) where length(:resize);
?.editKey.ctrl.N: ^N
?.editKey.ctrl.P: ^P
?.editKey.ctrl.Q: ^Q
?.editKey.ctrl.S: ^S
?.editKey.ctrl.T: ^T
?.editKey.ctrl.X: select 're',pfwidth(),pfheight();
?.editKey.space: ^c
?.editKey.return: ^e
?.editKey.f1: select 'im',:Import_Level;
?.editKey.f2: select 'ex',:Export_Level;
?.editClick.left: ^a
?.editClick.alt.left: ^u

        free(level_title);
        level_title=import_string(p+1);
        break;
      case '%':
        if(nlevelstrings>0x2000) {
          screen_message("Too many level strings");
        } else {
          levelstrings=realloc(levelstrings,(nlevelstrings+1)*sizeof(unsigned char*));
          if(!levelstrings) fatal("Allocation failed\n");
          levelstrings[nlevelstrings++]=import_string(p+1);
        }
        break;
      default:
        if(*p && *p!=';') {
          bad:

  level_id=i;
  free(level_title);
  level_title=strdup("New Level");
  if(!level_title) fatal("Allocation failed\n");
  level_changed=level_version=level_code=0;
  level_ord=level_nindex+1;
}

static int cursor_end(const Uint8*s) {
  int i=0;
  for(;;) {
    if(*s==10 || !*s) return i;
    if(*s==31 && s[1]) s++;
    i++;
    s++;
  }
}

static inline Uint8 pick_character(void) {
  SDL_Rect r;
  SDL_Event ev;
  Uint8 buf[17];
  int i,j;
  Uint8 p=0;
  redraw:
  r.x=r.y=4;
  r.w=r.h=0x9C;
  SDL_FillRect(screen,&r,0xF8);
  SDL_LockSurface(screen);
  draw_text(24,8,"0123456789ABCDEF",0xF8,0xF3);
  buf[16]=0;
  for(i=0;i<16;i++) {
    snprintf(buf,2,"%X",i);
    draw_text(8,(i+3)<<3,buf,0xF8,0xF3);
    for(j=0;j<16;j++) buf[j]=(i<<4)|j?:255;
    draw_text(24,(i+3)<<3,buf,0xF8,0xFF);
  }
  buf[0]=p?:255;
  buf[1]=0;
  i=p>>4;
  j=p&15;
  draw_text((j+3)<<3,(i+3)<<3,buf,0xF2,0xFE);
  SDL_UnlockSurface(screen);
  SDL_Flip(screen);
  while(SDL_WaitEvent(&ev)) {
    switch(ev.type) {
      case SDL_QUIT:
        SDL_PushEvent(&ev);
        return;
      case SDL_KEYDOWN:
        switch(ev.key.keysym.sym) {
          case SDLK_RETURN: case SDLK_SPACE: case SDLK_KP_ENTER: return p?:255;
          case SDLK_KP2: if(ev.key.keysym.mod&KMOD_NUM) goto norm; //fallthrough
          case SDLK_DOWN: p+=16; break;
          case SDLK_KP4: if(ev.key.keysym.mod&KMOD_NUM) goto norm; //fallthrough
          case SDLK_LEFT: p--; break;
          case SDLK_KP6: if(ev.key.keysym.mod&KMOD_NUM) goto norm; //fallthrough
          case SDLK_RIGHT: p++; break;
          case SDLK_KP8: if(ev.key.keysym.mod&KMOD_NUM) goto norm; //fallthrough
          case SDLK_UP: p-=16; break;
          default: norm:
            i=ev.key.keysym.unicode;
            if(i>='0' && i<='9') p=(p<<4)|(i-'0');
            if(i>='A' && i<='F') p=(p<<4)|(i+10-'A');
            if(i>='a' && i<='f') p=(p<<4)|(i+10-'a');
            if(i==13 || i==10) return p?:255;
        }
        goto redraw;
      case SDL_VIDEOEXPOSE:
        goto redraw;
    }
  }
}

static void edit_string(unsigned char**ps) {
  SDL_Rect rect;
  SDL_Event ev;
  char buf[19];
  Uint8*s=malloc(0x3000);
  Uint8*cp;
  Uint16 li[64];
  int c,e,i,j,n,r,sz;
  char o=0;
  char d=0;
  if(!s) fatal("Allocation failed\n");
  if(*ps) strncpy(s,*ps,0x2FFD); else *s=0;
  s[0x2FFD]=0;
  *li=0;
  c=r=0;
  redraw:
  e=0;
  redraw2:
  set_cursor(XC_xterm);
  rect.x=rect.y=0;
  rect.w=screen->w;
  rect.h=screen->h;
  SDL_FillRect(screen,&rect,0xF0);
  rect.h=24;
  SDL_FillRect(screen,&rect,0xF1);
  SDL_LockSurface(screen);
  if(ps==&level_title) {
    draw_text(0,16," Title: ",0xF9,0xFF);
  } else {
    snprintf(buf,19," String %d: ",(int)(ps-levelstrings));
    draw_text(0,16,buf,0xF9,0xFF);
  }
  draw_text(160,16,o?"OVR":"INS",0xF1,0xFE);
  draw_text(0,0,"<Esc> Cancel  <F1> Preview  <F2> Save  <\x18\x19\x1A\x1B> MoveCursor  <^P> InsertChar  <^Y> DelLine",0xF1,0xFB);
  draw_text(0,8,"ALT+  <0-7> Color  <B> Bar  <C> Center  <I> Image  <L> Left  <Q> Quiz",0xF1,0xFB);
  draw_text(0,24,"\x10",0xF0,0xF1);
  cp=0;
  for(i=j=n=0;s[i] && n<63;) {
    draw_text(0,(n+3)<<3,"\x10",0xF0,0xF1);
    i+=draw_text_line(8,(n+3)<<3,s+i,r==n?c:-1,&cp);
    if(j=(s[i]==10)) i++;
    sz=li[++n]=i;
  }
  if(!i) {
    sz=li[n=1]=r=c=0;
    cp=s;
    draw_text(8,24,"\xFE",0xFF,0xFE);
  } else if(j && n<63) {
    draw_text(0,(n+3)<<3,"\x10",0xF0,0xF1);
    draw_text(8,(n+3)<<3,"\xFE",r==n?0xFF:0xF0,r==n?0xFE:0xF1);
    if(r==n) cp=s+i,c=0;
    li[++n]=i;
  }
  if(r && r>=n) r--,e=0;
  if(n<63) li[n+1]=0xFFFF;
  SDL_UnlockSurface(screen);
  if(!cp) {
    if(e) fatal("Confusion in edit_string\n");
    c=cursor_end(s+li[r]);
    e=1;
    goto redraw2;
  }
  if(d) {
    d=0;
    goto del;
  }
  snprintf(buf,19,"%d,%d / %d [%d]",r+1,c,n,sz);
  draw_text(200,16,buf,0xF1,0xFA);
  SDL_Flip(screen);
  while(SDL_WaitEvent(&ev)) {
    switch(ev.type) {
      case SDL_QUIT:
        SDL_PushEvent(&ev);
        return;
      case SDL_KEYDOWN:
        switch(ev.key.keysym.sym) {
          case SDLK_ESCAPE: return;
          case SDLK_F1: modal_draw_popup(s); break;
          case SDLK_F2:
            free(*ps);
            *ps=s;
            return;
          case SDLK_KP0: if(ev.key.keysym.mod&KMOD_NUM) goto norm; //fallthrough
          case SDLK_INSERT: ins: o^=1; break;
          case SDLK_KP1: if(ev.key.keysym.mod&KMOD_NUM) goto norm; //fallthrough
          case SDLK_END: end: c=cursor_end(s+li[r]); break;
          case SDLK_KP2: if(ev.key.keysym.mod&KMOD_NUM) goto norm; //fallthrough
          case SDLK_DOWN: down: if(r<63 && li[r+1]!=0xFFFF) ++r; break;
          case SDLK_KP4: if(ev.key.keysym.mod&KMOD_NUM) goto norm; //fallthrough
          case SDLK_LEFT: left: if(c) --c; break;
          case SDLK_KP6: if(ev.key.keysym.mod&KMOD_NUM) goto norm; //fallthrough
          case SDLK_RIGHT: right: ++c; break;
          case SDLK_KP7: if(ev.key.keysym.mod&KMOD_NUM) goto norm; //fallthrough
          case SDLK_HOME: home: c=0; break;
          case SDLK_KP8: if(ev.key.keysym.mod&KMOD_NUM) goto norm; //fallthrough
          case SDLK_UP: up: if(r) --r; break;
          case SDLK_KP_PERIOD: if(ev.key.keysym.mod&KMOD_NUM) goto norm; //fallthrough
          case SDLK_DELETE: del:
            if(!*cp) break;
            i=(*cp==31?2:1);
            memmove(cp,cp+i,(s+sz)-(cp+i-1));
            break;
          case SDLK_BACKSPACE: back:
            if(cp==s || !c) break;
            c--;
            d=1;
            break;
          default: norm:
            i=ev.key.keysym.unicode;
            if(ev.key.keysym.mod&(KMOD_ALT|KMOD_META)) {
              switch(ev.key.keysym.sym) {
                case SDLK_0: i=1; goto addch;
                case SDLK_1: i=2; goto addch;
                case SDLK_2: i=3; goto addch;
                case SDLK_3: i=4; goto addch;
                case SDLK_4: i=5; goto addch;
                case SDLK_5: i=6; goto addch;
                case SDLK_6: i=7; goto addch;
                case SDLK_7: i=8; goto addch;
                case SDLK_b: i=15; goto addch;
                case SDLK_c: i=12; goto addch;
                case SDLK_i: i=14; goto addch;
                case SDLK_l: i=11; goto addch;
                case SDLK_n: i=10; goto addch;
                case SDLK_q: i=16; goto addch;
              }
            }
            if(i<32) {
              switch(i+64) {
                case 'A': goto home;
                case 'D': goto right;
                case 'E': goto up;
                case 'F': goto end;
                case 'G': goto del;
                case 'H': goto back;
                case 'M': i=10; goto addch;
                case 'P': goto specialchar;
                case 'S': goto left;
                case 'W': r=c=0; break;
                case 'X': goto down;
                case 'V': goto ins;
                case 'Y': goto erase;
                case 'Z': r=n?n-1:0; c=0; break;
              }
            } else if(i<127) {
              addch:
              if(i==10 && n>62) break;
              if(sz>=0x2FFC) break;
              if(o && *cp==31) memmove(cp,cp+1,(s+sz)-cp);
              if(!*cp) cp[1]=0;
              if(!o) memmove(cp+1,cp,(s+sz+1)-cp);
              *cp=i;
              if(i==10) r++,c=0; else c++;
            }
            break;
        }
        goto redraw;
      case SDL_VIDEOEXPOSE:
        goto redraw;
    }
  }
  erase:
  c=0;
  if(li[r+1]==0xFFFF) s[li[r]]=0; else memmove(s+li[r],s+li[r+1],sz+1-li[r+1]);
  if(r && r==n-1) --r;
  goto redraw;
  specialchar:
  if(sz>=0x2FFA) goto redraw;
  i=pick_character();
  if(i>=32) goto addch;
  if(o && *cp==31) memmove(cp,cp+1,(s+sz)-cp);
  if(!*cp) cp[1]=0;
  memmove(cp+1,cp,(s+sz+1)-cp);
  if(!o) memmove(cp+1,cp,(s+sz+1)-cp);
  *cp=31;
  cp[1]=i;
  c++;
  goto redraw;
}

static int editor_command(int prev,int cmd,int number,int argc,sqlite3_stmt*args,void*aux) {
  int x,y;
  switch(cmd) {
    case '^a': // Add object (no duplicates)
      if(prev) return prev;
      add_object_at(number&63?:64,number/64?:64,mru+curmru,1);

    case '^P': // Play
      return -2;
    case '^Q': // Quit
      return -1;
    case '^S': // Save level
      save_level();
      return 1;
    case '^T': // Level title
      edit_string(&level_title);
      return 0;
    case 'ex': // Export level
      if(argc<2) return prev;
      export_level(sqlite3_column_text(args,1));
      return prev;
    case 'go': // Select level
      load_level(number);
      return 1;

Uint8 pfwidth,pfheight;
Sint8 gameover,key_ignored;
Uint8 generation_number_inc;
Uint32 move_number;
unsigned char*quiz_text;
Inventory*inventory;
Uint32 ninventory;
unsigned char**levelstrings;
Uint16 nlevelstrings;
Value*array_data;
Uint16 ndeadanim;
DeadAnimation*deadanim;
Uint8 no_dead_anim;

typedef struct {

static Value send_message(Uint32 from,Uint32 to,Uint16 msg,Value arg1,Value arg2,Value arg3);
static Uint32 broadcast(Uint32 from,int c,Uint16 msg,Value arg1,Value arg2,Value arg3,int s);
static Value destroy(Uint32 from,Uint32 to,Uint32 why);

static const Sint8 x_delta[8]={1,1,0,-1,-1,-1,0,1};
static const Sint8 y_delta[8]={0,-1,-1,-1,0,1,1,1};

const unsigned char*value_string_ptr(Value v) {
  switch(v.t) {
    case TY_STRING: return stringpool[v.u];
    case TY_LEVELSTRING: return v.u<nlevelstrings?levelstrings[v.u]:(unsigned char*)"<Invalid level string>";
    default: fatal("Internal confusion: Trying to get string pointer for a non-string\n");
  }
}

void pfunlink(Uint32 n) {
  Object*o=objects[n];
  if(o->down==VOIDLINK) playfield[o->x+o->y*64-65]=o->up;

// Use only when screen is unlocked
void draw_picture(int x,int y,Uint16 img);
void draw_cell(int x,int y);

// Use only when screen is locked
void draw_text(int x,int y,const unsigned char*t,int bg,int fg);
int draw_text_line(int x,int y,unsigned char*t,int cur,Uint8**cp);
void draw_key(int x,int y,int k,int bg,int fg);

const char*screen_prompt(const char*txt);
int screen_message(const char*txt);

int scrollbar(int*cur,int page,int max,SDL_Event*ev,SDL_Rect*re);

extern Uint8 pfwidth,pfheight;
extern Sint8 gameover,key_ignored;
extern Uint8 generation_number_inc;
extern Uint32 move_number;
extern unsigned char*quiz_text;
extern Inventory*inventory;
extern Uint32 ninventory;
extern unsigned char**levelstrings;
extern Uint16 nlevelstrings;
extern Value*array_data;
extern Uint16 ndeadanim;
extern DeadAnimation*deadanim;
extern Uint8 no_dead_anim;

const unsigned char*value_string_ptr(Value v);
void pfunlink(Uint32 n);
void pflink(Uint32 n);
Uint32 objalloc(Uint16 c);
void objtrash(Uint32 n);
void annihilate(void);
const char*execute_turn(int key);
const char*init_level(void);

  }
  // Level strings
  i=0;
  while(p<end) {
    if(i>=max_objects) goto bad3;
    q=memchr(p,0,end-p);
    if(!q) goto bad1;
    levelstrings=realloc(levelstrings,(i+1)*sizeof(unsigned char*));
    if(!levelstrings) fatal("Allocation failed\n");
    levelstrings[i]=strdup(p);
    if(!levelstrings[i]) fatal("Allocation failed\n");
    p=q+1;
    i++;
  }
  nlevelstrings=i;

      ++f;
    }
    t++;
    if(!--len) return;
    pix+=8;
  }
}

int draw_text_line(int x,int y,unsigned char*t,int cur,Uint8**cp) {
  // To be called only when screen is locked!
  int len=strlen(t);
  const unsigned char*s=t;
  Uint8*pix=screen->pixels;
  Uint8*p;
  Uint16 pitch=screen->pitch;
  int bg,fg,xx,yy;
  char isimg=0;
  char e=0;
  const unsigned char*f;
  if(!*t) return 0;
  len=(screen->w-x)>>3;
  if(len<=0 || y+8>screen->h) return len<1?1:len;
  pix+=y*pitch+x;
  for(;;) {
    if(!cur) *cp=t;
    if(*t==10) {
      f=fontdata+(17<<3);
      bg=0xF0,fg=0xF1;
      e=1;
    } else if(!*t) {
      f=fontdata+(254<<3);
      bg=0xF0,fg=0xF1;
      e=1;
    } else if(*t<31) {
      f=fontdata+(" 01234567?NLC#IBQ???????????????"[*t]<<3);
      if(*t==14) isimg=1;
      bg=0xF3,fg=0xF0;
    } else {
      if(*t==31 && t[1]) t++;
      f=fontdata+(*t<<3);
      bg=0xF0,fg=isimg?0xF2:0xF7;
    }
    if(!cur--) bg^=15,fg^=15;
    p=pix;
    for(yy=0;yy<8;yy++) {
      for(xx=0;xx<8;xx++) p[xx]=(*f<<xx)&128?fg:bg;
      p+=pitch;
      ++f;
    }
    if(*t=='\\') isimg=0;
    if(!--len || e) return t-s;
    t++;
    pix+=8;
  }
}

void draw_key(int x,int y,int k,int bg,int fg) {
  // To be called only when screen is locked!
  Uint8*p=screen->pixels;
  Uint16 pitch=screen->pitch;
  int xx,yy;
  const unsigned char*f;