Doom2DosOriginal/HU_LIB.C

// HU_lib.c : heads-up text and input code

#include <ctype.h>
#include "doomdef.h"
#include "hu_lib.h"
#include "r_local.h"

// boolean : whether the screen is always erased
#define noterased viewwindowx

extern boolean automapactive; // in AM_map.c

void R_VideoErase(int y, int offset);

void HUlib_init(void)
{
}

void HUlib_clearTextLine(hu_textline_t *t)
{
  t->len = 0;
  t->l[0] = 0;
  t->needsupdate = true;
}

void HUlib_initTextLine(hu_textline_t *t, int x, int y, patch_t **f, int sc)
{
  t->x = x;
  t->y = y;
  t->f = f;
  t->sc = sc;
  HUlib_clearTextLine(t);
}

boolean HUlib_addCharToTextLine(hu_textline_t *t, char ch)
{

  if (t->len == HU_MAXLINELENGTH) return false;
  else
  {
    t->l[t->len++] = ch;
    t->l[t->len] = 0;
    t->needsupdate = 4;
    return true;
  }

}

boolean HUlib_delCharFromTextLine(hu_textline_t *t)
{

  if (!t->len) return false;
  else
  {
    t->l[--t->len] = 0;
    t->needsupdate = 4;
    return true;
  }

}

void HUlib_drawTextLine(hu_textline_t *l, boolean drawcursor)
{

  int i, w, x;
  unsigned char c;

  // draw the new stuff
  x = l->x;
  for (i=0;i<l->len;i++)
  {
    c = toupper(l->l[i]);
    if (c != ' ' && c >= l->sc && c <= '_')
    {
      w = SHORT(l->f[c - l->sc]->width);
      if (x+w > SCREENWIDTH) break;
      V_DrawPatchDirect(x, l->y, FG, l->f[c - l->sc]);
      x += w;
    } else {
      x += 4;
      if (x >= SCREENWIDTH) break;
    }
  }

  // draw the cursor if requested
  if (drawcursor && x + SHORT(l->f['_' - l->sc]->width) <= SCREENWIDTH)
    V_DrawPatchDirect(x, l->y, FG, l->f['_' - l->sc]);

}

// sorta called by HU_Erase and just better darn get things straight

void HUlib_eraseTextLine(hu_textline_t *l)
{

  int lh, y, yoffset;
  static boolean lastautomapactive = true;

  // only erases when NOT in automap and the screen is reduced.
  // and the text must either need updating or refreshing (because of
  // a recent change back from the automap)

  if (!automapactive && viewwindowx && l->needsupdate)
  {
    lh = SHORT(l->f[0]->height) + 1;
    for (y=l->y,yoffset=y*SCREENWIDTH ; y<l->y+lh ; y++,yoffset+=SCREENWIDTH)
    {
      if (y < viewwindowy || y >= viewwindowy + viewheight)
	R_VideoErase(yoffset, SCREENWIDTH); // erase entire line
      else
      {
	R_VideoErase(yoffset, viewwindowx); // erase left border
	R_VideoErase(yoffset + viewwindowx + viewwidth, viewwindowx);
	  // erase right border
      }
    }
  }

  lastautomapactive = automapactive;
  if (l->needsupdate) l->needsupdate--;

}

void HUlib_initSText(hu_stext_t *s, int x, int y, int h, patch_t **font,
  int startchar, boolean *on)
{

  int i;

  s->h = h;
  s->on = on;
  s->laston = true;
  s->cl = 0;
  for (i=0;i<h;i++) HUlib_initTextLine(&s->l[i], x,
    y - i*(SHORT(font[0]->height)+1), font, startchar);

}

void HUlib_addLineToSText(hu_stext_t *s)
{

  int i;

  // add a clear line
  if (++s->cl == s->h) s->cl = 0;
  HUlib_clearTextLine(&s->l[s->cl]);

  // everything needs updating
  for (i=0 ; i<s->h ; i++) s->l[i].needsupdate = 4;

}

void HUlib_addMessageToSText(hu_stext_t *s, char *prefix, char *msg)
{
  HUlib_addLineToSText(s);
  if (prefix)
    while (*prefix) HUlib_addCharToTextLine(&s->l[s->cl], *(prefix++));
  while (*msg) HUlib_addCharToTextLine(&s->l[s->cl], *(msg++));
}

void HUlib_drawSText(hu_stext_t *s)
{
  int i, idx;
  hu_textline_t *l;

  if (!*s->on) return; // if not on, don't draw

  // draw everything
  for (i=0 ; i<s->h ; i++)
  {
    idx = s->cl - i;
    if (idx < 0) idx += s->h; // handle queue of lines
    l = &s->l[idx];
    // need a decision made here on whether to skip the draw
    HUlib_drawTextLine(l, false); // no cursor, please
  }

}

void HUlib_eraseSText(hu_stext_t *s)
{

  int i;

  for (i=0 ; i<s->h ; i++)
  {
    if (s->laston && !*s->on) s->l[i].needsupdate = 4;
    HUlib_eraseTextLine(&s->l[i]);
  }
  s->laston = *s->on;

}

void HUlib_initIText(hu_itext_t *it, int x, int y, patch_t **font,
  int startchar, boolean *on)
{
  it->lm = 0; // default left margin is start of text
  it->on = on;
  it->laston = true;
  HUlib_initTextLine(&it->l, x, y, font, startchar);
}

// The following deletion routines adhere to the left margin restriction

void HUlib_delCharFromIText(hu_itext_t *it)
{
  if (it->l.len != it->lm)
    HUlib_delCharFromTextLine(&it->l);
}

void HUlib_eraseLineFromIText(hu_itext_t *it)
{
  while (it->lm != it->l.len) HUlib_delCharFromTextLine(&it->l);
}

// Resets left margin as well
void HUlib_resetIText(hu_itext_t *it)
{
  it->lm = 0;
  HUlib_clearTextLine(&it->l);
}

void HUlib_addPrefixToIText(hu_itext_t *it, char *str)
{
  while (*str) HUlib_addCharToTextLine(&it->l, *(str++));
  it->lm = it->l.len;
}

// wrapper function for handling general keyed input.
// returns true if it ate the key

boolean HUlib_keyInIText(hu_itext_t *it, unsigned char ch)
{

  if (ch >= ' ' && ch <= '_') 
  	HUlib_addCharToTextLine(&it->l, (char) ch);
  else 
  if (ch == KEY_BACKSPACE) 
  	HUlib_delCharFromIText(it);
  else 
  if (ch != KEY_ENTER) 
  	return false; // did not eat key

  return true; // ate the key

}

void HUlib_drawIText(hu_itext_t *it)
{

  hu_textline_t *l = &it->l;

  if (!*it->on) return;
  HUlib_drawTextLine(l, true); // draw the line w/ cursor

}

void HUlib_eraseIText(hu_itext_t *it)
{
  if (it->laston && !*it->on) it->l.needsupdate = 4;
  HUlib_eraseTextLine(&it->l);
  it->laston = *it->on;
}