Subversion Repositories SvarDOS

Rev

Rev 1353 | Rev 1355 | Go to most recent revision | Details | Compare with Previous | Last modification | View Log | RSS feed

Rev Author Line No. Line
1283 mateusz.vi 1 
/* Sved, the SvarDOS editor
2 
 *
3 
 * Copyright (C) 2023 Mateusz Viste
4 
 *
5 
 * Sved is released under the terms of the MIT license.
6 
 *
7 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 
 * of this software and associated documentation files (the "Software"), to
9 
 * deal in the Software without restriction, including without limitation the
10 
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
11 
 * sell copies of the Software, and to permit persons to whom the Software is
12 
 * furnished to do so, subject to the following conditions:
13 
 *
14 
 * The above copyright notice and this permission notice shall be included in
15 
 * all copies or substantial portions of the Software.
16 
 *
17 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
20 
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
22 
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
23 
 * IN THE SOFTWARE.
24 
 */
1275 mateusz.vi 25 
 
1338 mateusz.vi 26 
#include <dos.h>      /* _dos_open(), _dos_read(), _dos_close(), ... */
27 
#include <fcntl.h>    /* O_RDONLY, O_WRONLY */
1275 mateusz.vi 28 
#include <string.h>
29 
 
1312 mateusz.vi 30 
#include "mdr\bios.h"
1275 mateusz.vi 31 
#include "mdr\cout.h"
1307 mateusz.vi 32 
#include "mdr\dos.h"
1275 mateusz.vi 33 
#include "mdr\keyb.h"
34 
 
1282 mateusz.vi 35 
#include "svarlang\svarlang.h"
36 
 
1326 mateusz.vi 37 
 
38 
/*****************************************************************************
39 
 * global variables and definitions                                          *
40 
 *****************************************************************************/
41 
 
1275 mateusz.vi 42 
/* preload the mono scheme (to be overloaded at runtime if color adapter present) */
1333 mateusz.vi 43 
static unsigned char SCHEME_TEXT   = 0x07,
1354 mateusz.vi 44 
                     SCHEME_MENU   = 0x70,
45 
                     SCHEME_MENU_CUR= 0x0f,
46 
                     SCHEME_MENU_SEL= 0x00,
1333 mateusz.vi 47 
                     SCHEME_STBAR1 = 0x70,
48 
                     SCHEME_STBAR2 = 0x70,
49 
                     SCHEME_STBAR3 = 0xf0,
50 
                     SCHEME_SCROLL = 0x70,
51 
                     SCHEME_MSG    = 0x70,
52 
                     SCHEME_ERR    = 0xf0;
1327 mateusz.vi 53 
 
1326 mateusz.vi 54 
static unsigned char screenw, screenh;
1275 mateusz.vi 55 
 
1327 mateusz.vi 56 
static struct {
57 
    unsigned char from;
58 
    unsigned char to;
1342 mateusz.vi 59 
    unsigned char statusbar;
60 
} uidirty = {0, 0xff, 1}; /* make sure to redraw entire UI at first run */
1327 mateusz.vi 61 
 
1275 mateusz.vi 62 
#define SCROLL_CURSOR 0xB1
63 
 
64 
struct line {
1288 mateusz.vi 65 
  struct line far *prev;
66 
  struct line far *next;
1275 mateusz.vi 67 
  unsigned short len;
68 
  char payload[1];
69 
};
70 
 
1315 mateusz.vi 71 
struct file {
1288 mateusz.vi 72 
  struct line far *cursor;
1275 mateusz.vi 73 
  unsigned short xoffset;
1348 mateusz.vi 74 
  unsigned short cursorposx;
75 
  unsigned short cursorposy;
1328 mateusz.vi 76 
  unsigned short totlines;
77 
  unsigned short curline;
1330 mateusz.vi 78 
  char lfonly;   /* set if line endings are LF (CR/LF otherwise) */
79 
  char modflag;  /* non-zero if file has been modified since last save */
1332 mateusz.vi 80 
  char fname[128];
1275 mateusz.vi 81 
};
82 
 
83 
 
1326 mateusz.vi 84 
/*****************************************************************************
85 
 * functions                                                                 *
86 
 *****************************************************************************/
87 
 
1339 mateusz.vi 88 
static struct line far *line_calloc(unsigned short siz) {
1342 mateusz.vi 89 
  struct line far *res;
1339 mateusz.vi 90 
  unsigned int seg;
1341 mateusz.vi 91 
  if (_dos_allocmem((sizeof(struct line) + siz + 15) / 16, &seg) != 0) return(NULL);
1342 mateusz.vi 92 
  res = MK_FP(seg, 0);
93 
  _fmemset(res, 0, sizeof(struct line) + siz);
1339 mateusz.vi 94 
  return(MK_FP(seg, 0));
95 
}
96 
 
97 
 
98 
static void line_free(struct line far *ptr) {
99 
  _dos_freemem(FP_SEG(ptr));
100 
}
101 
 
102 
 
1348 mateusz.vi 103 
static int curline_resize(struct file far *db, unsigned short newsiz) {
1339 mateusz.vi 104 
  unsigned int maxavail;
105 
  struct line far *newptr;
106 
 
1341 mateusz.vi 107 
  /* try resizing the block (much faster) */
108 
  if (_dos_setblock((sizeof(struct line) + newsiz + 15) / 16, FP_SEG(db->cursor), &maxavail) == 0) return(0);
1339 mateusz.vi 109 
 
110 
  /* create a new block and copy data over */
111 
  newptr = line_calloc(newsiz);
1340 mateusz.vi 112 
  if (newptr == NULL) return(-1);
113 
  _fmemmove(newptr, db->cursor, sizeof(struct line) + db->cursor->len);
114 
 
115 
  /* rewire the linked list */
116 
  db->cursor = newptr;
117 
  if (newptr->next) newptr->next->prev = newptr;
118 
  if (newptr->prev) newptr->prev->next = newptr;
119 
 
120 
  return(0);
1339 mateusz.vi 121 
}
122 
 
123 
 
1328 mateusz.vi 124 
/* adds a new line at cursor position into file linked list and advance cursor
1324 mateusz.vi 125 
 * returns non-zero on error */
1328 mateusz.vi 126 
static int line_add(struct file *db, const char far *line, unsigned short slen) {
1288 mateusz.vi 127 
  struct line far *l;
1275 mateusz.vi 128 
 
1339 mateusz.vi 129 
  l = line_calloc(slen);
1287 mateusz.vi 130 
  if (l == NULL) return(-1);
131 
 
1275 mateusz.vi 132 
  l->prev = db->cursor;
133 
  if (db->cursor) {
134 
    l->next = db->cursor->next;
135 
    db->cursor->next = l;
136 
    l->next->prev = l;
137 
  }
138 
  db->cursor = l;
1342 mateusz.vi 139 
  if (slen > 0) {
140 
    _fmemmove(l->payload, line, slen);
141 
    l->len = slen;
142 
  }
1287 mateusz.vi 143 
 
1328 mateusz.vi 144 
  db->totlines += 1;
145 
  db->curline += 1;
146 
 
1287 mateusz.vi 147 
  return(0);
1275 mateusz.vi 148 
}
149 
 
150 
 
1348 mateusz.vi 151 
static void ui_getstring(const char *query, char *s, unsigned short maxlen) {
152 
  unsigned short len = 0;
153 
  unsigned char y, x;
1332 mateusz.vi 154 
  int k;
155 
 
156 
  if (maxlen == 0) return;
157 
  maxlen--; /* make room for the nul terminator */
158 
 
159 
  y = screenh - 1;
160 
 
161 
  /* print query string */
1333 mateusz.vi 162 
  x = mdr_cout_str(y, 0, query, SCHEME_STBAR3, 40);
163 
  mdr_cout_char_rep(y, x++, ' ', SCHEME_STBAR3, screenw - x);
1332 mateusz.vi 164 
 
165 
  for (;;) {
166 
    mdr_cout_locate(y, x + len);
167 
    k = keyb_getkey();
168 
 
1345 mateusz.vi 169 
    switch (k) {
170 
      case 0x1b: /* ESC */
171 
        s[0] = 0;
172 
        return;
173 
      case '\r':
174 
        s[len] = 0;
175 
        return;
176 
      case 0x08: /* BKSPC */
177 
        if (len > 0) {
178 
          len--;
179 
          mdr_cout_char(y, x + len, ' ', SCHEME_STBAR3);
180 
        }
181 
        break;
182 
      default:
183 
        if ((k <= 0xff) && (k >= ' ') && (len < maxlen)) {
184 
          mdr_cout_char(y, x + len, k, SCHEME_STBAR3);
185 
          s[len++] = k;
186 
        }
1332 mateusz.vi 187 
    }
1345 mateusz.vi 188 
  }
1332 mateusz.vi 189 
 
190 
}
191 
 
192 
 
1324 mateusz.vi 193 
/* append a nul-terminated string to line at cursor position */
194 
static int line_append(struct file *f, const char far *buf, unsigned short len) {
195 
  if (sizeof(struct line) + f->cursor->len + len < len) return(-1); /* overflow check */
1340 mateusz.vi 196 
  if (curline_resize(f, f->cursor->len + len) != 0) return(-1);
1337 mateusz.vi 197 
  _fmemmove(f->cursor->payload + f->cursor->len, buf, len);
1324 mateusz.vi 198 
  f->cursor->len += len;
199 
 
200 
  return(0);
201 
}
202 
 
203 
 
1315 mateusz.vi 204 
static void db_rewind(struct file *db) {
1275 mateusz.vi 205 
  if (db->cursor == NULL) return;
206 
  while (db->cursor->prev) db->cursor = db->cursor->prev;
1328 mateusz.vi 207 
  db->curline = 0;
1275 mateusz.vi 208 
}
209 
 
210 
 
1326 mateusz.vi 211 
static void ui_basic(const struct file *db) {
1302 mateusz.vi 212 
  const char *s = svarlang_strid(0); /* HELP */
1348 mateusz.vi 213 
  unsigned short helpcol = screenw - strlen(s);
1275 mateusz.vi 214 
 
1330 mateusz.vi 215 
  /* fill status bar with background (without modflag as it is refreshed by ui_refresh) */
1333 mateusz.vi 216 
  mdr_cout_char_rep(screenh - 1, 1, ' ', SCHEME_STBAR1, screenw - 1);
1313 mateusz.vi 217 
 
218 
  /* filename */
1330 mateusz.vi 219 
  {
220 
    const char *fn = db->fname;
221 
    if (*fn == 0) fn = svarlang_str(0, 1);
1333 mateusz.vi 222 
    mdr_cout_str(screenh - 1, 1, fn, SCHEME_STBAR1, screenw);
1321 mateusz.vi 223 
  }
1313 mateusz.vi 224 
 
225 
  /* eol type */
1330 mateusz.vi 226 
  {
227 
    const char *eoltype = "CRLF";
1353 mateusz.vi 228 
    if (db->lfonly) eoltype += 2;
1335 mateusz.vi 229 
    mdr_cout_str(screenh - 1, helpcol - 6, eoltype, SCHEME_STBAR1, 5);
1275 mateusz.vi 230 
  }
1313 mateusz.vi 231 
 
1335 mateusz.vi 232 
  mdr_cout_str(screenh - 1, helpcol, s, SCHEME_STBAR2, 40);
1275 mateusz.vi 233 
}
234 
 
235 
 
1331 mateusz.vi 236 
static void ui_msg(const char *msg1, const char *msg2, unsigned char attr) {
1312 mateusz.vi 237 
  unsigned short x, y, msglen, i;
1331 mateusz.vi 238 
  unsigned char msg2flag = 0;
239 
 
240 
  msglen = strlen(msg1);
241 
  if (msg2) {
242 
    msg2flag = 1;
243 
    i = strlen(msg2);
244 
    if (i > msglen) msglen = i;
245 
  }
246 
 
247 
  y = (screenh - 6) >> 1;
1312 mateusz.vi 248 
  x = (screenw - msglen - 4) >> 1;
1331 mateusz.vi 249 
  for (i = y+2+msg2flag; i >= y; i--) mdr_cout_char_rep(i, x, ' ', attr, msglen + 2);
250 
  x++;
1345 mateusz.vi 251 
 
1331 mateusz.vi 252 
  mdr_cout_str(y+1, x, msg1, attr, msglen);
253 
  if (msg2) mdr_cout_str(y+2, x, msg2, attr, msglen);
1312 mateusz.vi 254 
 
1327 mateusz.vi 255 
  if (uidirty.from > y) uidirty.from = y;
1331 mateusz.vi 256 
  if (uidirty.to < y+4) uidirty.to = y+4;
1312 mateusz.vi 257 
}
258 
 
259 
 
1342 mateusz.vi 260 
static unsigned char ui_confirm_if_unsaved(struct file *db) {
261 
  if (db->modflag == 0) return(0);
262 
 
263 
  /* if file has been modified then ask for confirmation */
264 
  ui_msg(svarlang_str(0,4), svarlang_str(0,5), SCHEME_MSG);
265 
  if (keyb_getkey() == '\r') return(0);
266 
 
267 
  return(1);
268 
}
269 
 
270 
 
1327 mateusz.vi 271 
static void ui_refresh(const struct file *db) {
1318 mateusz.vi 272 
  unsigned char x;
1310 mateusz.vi 273 
  const struct line far *l;
1316 mateusz.vi 274 
  unsigned char y = db->cursorposy;
1275 mateusz.vi 275 
 
1288 mateusz.vi 276 
#ifdef DBG_REFRESH
1282 mateusz.vi 277 
  static char m = 'a';
278 
  m++;
279 
  if (m > 'z') m = 'a';
1288 mateusz.vi 280 
#endif
1282 mateusz.vi 281 
 
1310 mateusz.vi 282 
  /* rewind cursor line to first line that needs redrawing */
1327 mateusz.vi 283 
  for (l = db->cursor; y > uidirty.from; y--) l = l->prev;
1282 mateusz.vi 284 
 
1310 mateusz.vi 285 
  /* iterate over lines and redraw whatever needs to be redrawn */
286 
  for (; l != NULL; l = l->next, y++) {
287 
 
288 
    /* skip lines that do not need to be refreshed */
1327 mateusz.vi 289 
    if (y < uidirty.from) continue;
290 
    if (y > uidirty.to) break;
1282 mateusz.vi 291 
 
1318 mateusz.vi 292 
    x = 0;
1275 mateusz.vi 293 
    if (db->xoffset < l->len) {
1318 mateusz.vi 294 
      unsigned char i, limit;
295 
      if (l->len - db->xoffset < screenw) {
296 
        limit = l->len;
297 
      } else {
298 
        limit = db->xoffset + screenw - 1;
299 
      }
1333 mateusz.vi 300 
      for (i = db->xoffset; i < limit; i++) mdr_cout_char(y, x++, l->payload[i], SCHEME_TEXT);
1275 mateusz.vi 301 
    }
1282 mateusz.vi 302 
 
1318 mateusz.vi 303 
    /* write empty spaces until end of line */
1333 mateusz.vi 304 
    if (x < screenw - 1) mdr_cout_char_rep(y, x, ' ', SCHEME_TEXT, screenw - 1 - x);
1318 mateusz.vi 305 
 
1288 mateusz.vi 306 
#ifdef DBG_REFRESH
1333 mateusz.vi 307 
    mdr_cout_char(y, 0, m, SCHEME_STBAR1);
1288 mateusz.vi 308 
#endif
1282 mateusz.vi 309 
 
1275 mateusz.vi 310 
    if (y == screenh - 2) break;
311 
  }
1310 mateusz.vi 312 
 
1319 mateusz.vi 313 
  /* fill all lines below if empty (and they need to be redrawn) */
314 
  if (l == NULL) {
1327 mateusz.vi 315 
    while ((y < screenh - 1) && (y < uidirty.to)) {
1333 mateusz.vi 316 
      mdr_cout_char_rep(y++, 0, ' ', SCHEME_TEXT, screenw - 1);
1319 mateusz.vi 317 
    }
1318 mateusz.vi 318 
  }
1328 mateusz.vi 319 
 
1330 mateusz.vi 320 
  /* "file changed" flag */
1351 mateusz.vi 321 
  mdr_cout_char(screenh - 1, 0, db->modflag, SCHEME_STBAR1);
1330 mateusz.vi 322 
 
1328 mateusz.vi 323 
  /* scroll bar */
324 
  for (y = 0; y < (screenh - 1); y++) {
1333 mateusz.vi 325 
    mdr_cout_char(y, screenw - 1, SCROLL_CURSOR, SCHEME_SCROLL);
1328 mateusz.vi 326 
  }
327 
 
328 
  /* scroll cursor */
329 
  if (db->totlines >= screenh) {
330 
    unsigned short topline = db->curline - db->cursorposy;
331 
    unsigned short col;
332 
    unsigned short totlines = db->totlines - screenh + 1;
333 
    if (db->totlines - screenh > screenh) {
334 
      col = topline / (totlines / (screenh - 1));
335 
    } else {
336 
      col = topline * (screenh - 1) / totlines;
337 
    }
338 
    if (col >= screenh - 1) col = screenh - 2;
1333 mateusz.vi 339 
    mdr_cout_char(col, screenw - 1, ' ', SCHEME_SCROLL);
1328 mateusz.vi 340 
  }
1275 mateusz.vi 341 
}
342 
 
343 
 
1327 mateusz.vi 344 
static void check_cursor_not_after_eol(struct file *db) {
1316 mateusz.vi 345 
  if (db->xoffset + db->cursorposx <= db->cursor->len) return;
1275 mateusz.vi 346 
 
347 
  if (db->cursor->len < db->xoffset) {
1316 mateusz.vi 348 
    db->cursorposx = 0;
1275 mateusz.vi 349 
    db->xoffset = db->cursor->len;
1327 mateusz.vi 350 
    uidirty.from = 0;
351 
    uidirty.to = 0xff;
1275 mateusz.vi 352 
  } else {
1316 mateusz.vi 353 
    db->cursorposx = db->cursor->len - db->xoffset;
1275 mateusz.vi 354 
  }
355 
}
356 
 
357 
 
1327 mateusz.vi 358 
static void cursor_up(struct file *db) {
1275 mateusz.vi 359 
  if (db->cursor->prev != NULL) {
1328 mateusz.vi 360 
    db->curline -= 1;
1275 mateusz.vi 361 
    db->cursor = db->cursor->prev;
1316 mateusz.vi 362 
    if (db->cursorposy == 0) {
1327 mateusz.vi 363 
      uidirty.from = 0;
364 
      uidirty.to = 0xff;
1275 mateusz.vi 365 
    } else {
1316 mateusz.vi 366 
      db->cursorposy -= 1;
1275 mateusz.vi 367 
    }
368 
  }
369 
}
370 
 
371 
 
1327 mateusz.vi 372 
static void cursor_eol(struct file *db) {
1275 mateusz.vi 373 
  /* adjust xoffset to make sure eol is visible on screen */
1282 mateusz.vi 374 
  if (db->xoffset > db->cursor->len) {
375 
    db->xoffset = db->cursor->len - 1;
1327 mateusz.vi 376 
    uidirty.from = 0;
377 
    uidirty.to = 0xff;
1282 mateusz.vi 378 
  }
379 
 
380 
  if (db->xoffset + screenw - 1 <= db->cursor->len) {
381 
    db->xoffset = db->cursor->len - screenw + 2;
1327 mateusz.vi 382 
    uidirty.from = 0;
383 
    uidirty.to = 0xff;
1282 mateusz.vi 384 
  }
1316 mateusz.vi 385 
  db->cursorposx = db->cursor->len - db->xoffset;
1275 mateusz.vi 386 
}
387 
 
388 
 
1327 mateusz.vi 389 
static void cursor_down(struct file *db) {
1276 mateusz.vi 390 
  if (db->cursor->next != NULL) {
1328 mateusz.vi 391 
    db->curline += 1;
1276 mateusz.vi 392 
    db->cursor = db->cursor->next;
1316 mateusz.vi 393 
    if (db->cursorposy < screenh - 2) {
394 
      db->cursorposy += 1;
1276 mateusz.vi 395 
    } else {
1327 mateusz.vi 396 
      uidirty.from = 0;
397 
      uidirty.to = 0xff;
1276 mateusz.vi 398 
    }
399 
  }
400 
}
401 
 
402 
 
1327 mateusz.vi 403 
static void cursor_left(struct file *db) {
1316 mateusz.vi 404 
  if (db->cursorposx > 0) {
405 
    db->cursorposx -= 1;
1302 mateusz.vi 406 
  } else if (db->xoffset > 0) {
407 
    db->xoffset -= 1;
1327 mateusz.vi 408 
    uidirty.from = 0;
409 
    uidirty.to = 0xff;
1302 mateusz.vi 410 
  } else if (db->cursor->prev != NULL) { /* jump to end of line above */
1327 mateusz.vi 411 
    cursor_up(db);
412 
    cursor_eol(db);
1302 mateusz.vi 413 
  }
414 
}
415 
 
416 
 
1327 mateusz.vi 417 
static void cursor_home(struct file *db) {
1316 mateusz.vi 418 
  db->cursorposx = 0;
1282 mateusz.vi 419 
  if (db->xoffset != 0) {
420 
    db->xoffset = 0;
1327 mateusz.vi 421 
    uidirty.from = 0;
422 
    uidirty.to = 0xff;
1282 mateusz.vi 423 
  }
1276 mateusz.vi 424 
}
425 
 
426 
 
1327 mateusz.vi 427 
static void cursor_right(struct file *db) {
1316 mateusz.vi 428 
  if (db->cursor->len > db->xoffset + db->cursorposx) {
429 
    if (db->cursorposx < screenw - 2) {
430 
      db->cursorposx += 1;
1308 mateusz.vi 431 
    } else {
432 
      db->xoffset += 1;
1327 mateusz.vi 433 
      uidirty.from = 0;
434 
      uidirty.to = 0xff;
1308 mateusz.vi 435 
    }
436 
  } else {
1327 mateusz.vi 437 
    cursor_down(db);
438 
    cursor_home(db);
1308 mateusz.vi 439 
  }
440 
}
441 
 
442 
 
1327 mateusz.vi 443 
static void del(struct file *db) {
1316 mateusz.vi 444 
  if (db->cursorposx + db->xoffset < db->cursor->len) {
445 
    _fmemmove(db->cursor->payload + db->cursorposx + db->xoffset, db->cursor->payload + db->cursorposx + db->xoffset + 1, db->cursor->len - db->cursorposx - db->xoffset);
1292 mateusz.vi 446 
    db->cursor->len -= 1; /* do this AFTER memmove so the copy includes the nul terminator */
1327 mateusz.vi 447 
    uidirty.from = db->cursorposy;
448 
    uidirty.to = db->cursorposy;
1351 mateusz.vi 449 
    db->modflag = '*';
1292 mateusz.vi 450 
  } else if (db->cursor->next != NULL) { /* cursor is at end of line: merge current line with next one (if there is a next one) */
451 
    struct line far *nextline = db->cursor->next;
452 
    if (db->cursor->next->len > 0) {
1340 mateusz.vi 453 
      if (curline_resize(db, db->cursor->len + db->cursor->next->len + 1) == 0) {
1337 mateusz.vi 454 
        _fmemmove(db->cursor->payload + db->cursor->len, db->cursor->next->payload, db->cursor->next->len + 1);
1292 mateusz.vi 455 
        db->cursor->len += db->cursor->next->len;
456 
      }
457 
    }
1340 mateusz.vi 458 
 
1292 mateusz.vi 459 
    db->cursor->next = db->cursor->next->next;
460 
    db->cursor->next->prev = db->cursor;
1340 mateusz.vi 461 
 
1339 mateusz.vi 462 
    line_free(nextline);
1327 mateusz.vi 463 
    uidirty.from = db->cursorposy;
464 
    uidirty.to = 0xff;
1328 mateusz.vi 465 
    db->totlines -= 1;
1351 mateusz.vi 466 
    db->modflag = '*';
1292 mateusz.vi 467 
  }
468 
}
469 
 
470 
 
1327 mateusz.vi 471 
static void bkspc(struct file *db) {
1302 mateusz.vi 472 
 
473 
  /* backspace is basically "left + del", not applicable only if cursor is on 1st byte of the file */
1316 mateusz.vi 474 
  if ((db->cursorposx == 0) && (db->xoffset == 0) && (db->cursor->prev == NULL)) return;
1302 mateusz.vi 475 
 
1327 mateusz.vi 476 
  cursor_left(db);
477 
  del(db);
1302 mateusz.vi 478 
}
479 
 
480 
 
1286 mateusz.vi 481 
/* a custom argv-parsing routine that looks directly inside the PSP, avoids the need
482 
 * of argc and argv, saves some 330 bytes of binary size */
1352 mateusz.vi 483 
static const char *parseargv(void) {
1286 mateusz.vi 484 
  char *tail = (void *)0x81; /* THIS WORKS ONLY IN SMALL MEMORY MODEL */
1348 mateusz.vi 485 
  unsigned short count = 0;
1352 mateusz.vi 486 
  char *argv[2];
1286 mateusz.vi 487 
 
1352 mateusz.vi 488 
  while (count < 2) {
1286 mateusz.vi 489 
    /* jump to nearest arg */
490 
    while (*tail == ' ') {
491 
      *tail = 0;
492 
      tail++;
493 
    }
494 
 
495 
    if (*tail == '\r') {
496 
      *tail = 0;
497 
      break;
498 
    }
499 
 
500 
    argv[count++] = tail;
501 
 
502 
    /* jump to next delimiter */
503 
    while ((*tail != ' ') && (*tail != '\r')) tail++;
504 
  }
505 
 
506 
  /* check args now */
1321 mateusz.vi 507 
  if (count == 0) return("");
1352 mateusz.vi 508 
  if (count == 1) return(argv[0]);
1286 mateusz.vi 509 
 
1352 mateusz.vi 510 
  return(NULL);
1286 mateusz.vi 511 
}
512 
 
513 
 
1346 mateusz.vi 514 
/* returns 0 on success, 1 on file not found, 2 on other error */
515 
static unsigned char loadfile(struct file *db, const char *fname) {
1324 mateusz.vi 516 
  char buff[512]; /* read one entire sector at a time (faster) */
517 
  char *buffptr;
518 
  unsigned int len, llen;
1287 mateusz.vi 519 
  int fd;
1324 mateusz.vi 520 
  unsigned char eolfound;
1287 mateusz.vi 521 
 
1339 mateusz.vi 522 
  bzero(db, sizeof(db));
523 
  memcpy(db->fname, fname, strlen(fname));
1321 mateusz.vi 524 
 
525 
  if (*fname == 0) goto SKIPLOADING;
526 
 
1287 mateusz.vi 527 
  if (_dos_open(fname, O_RDONLY, &fd) != 0) {
1346 mateusz.vi 528 
    return(1);
1287 mateusz.vi 529 
  }
530 
 
1313 mateusz.vi 531 
  db->lfonly = 1;
532 
 
1324 mateusz.vi 533 
  /* start by adding an empty line */
1328 mateusz.vi 534 
  if (line_add(db, NULL, 0) != 0) {
1324 mateusz.vi 535 
    /* TODO ERROR HANDLING */
536 
  }
1287 mateusz.vi 537 
 
1324 mateusz.vi 538 
  for (eolfound = 0;;) {
539 
    unsigned short consumedbytes;
540 
 
541 
    if ((_dos_read(fd, buff, sizeof(buff), &len) != 0) || (len == 0)) break;
542 
    buffptr = buff;
543 
 
544 
    FINDLINE:
545 
 
546 
    /* look for nearest \n */
547 
    for (consumedbytes = 0;; consumedbytes++) {
548 
      if (consumedbytes == len) {
549 
        llen = consumedbytes;
550 
        break;
1323 mateusz.vi 551 
      }
1324 mateusz.vi 552 
      if (buffptr[consumedbytes] == '\r') {
553 
        llen = consumedbytes;
554 
        consumedbytes++;
555 
        db->lfonly = 0;
1320 mateusz.vi 556 
        break;
557 
      }
1324 mateusz.vi 558 
      if (buffptr[consumedbytes] == '\n') {
559 
        eolfound = 1;
560 
        llen = consumedbytes;
561 
        consumedbytes++;
562 
        break;
563 
      }
1287 mateusz.vi 564 
    }
1324 mateusz.vi 565 
 
566 
    /* consumedbytes is the amount of bytes processed from buffptr,
567 
     * llen is the length of line's payload (without its line terminator) */
568 
 
569 
    /* append content, if line is non-empty */
570 
    if ((llen > 0) && (line_append(db, buffptr, llen) != 0)) {
1339 mateusz.vi 571 
      goto IOERR;
1287 mateusz.vi 572 
    }
573 
 
1324 mateusz.vi 574 
    /* add a new line if necessary */
575 
    if (eolfound) {
1328 mateusz.vi 576 
      if (line_add(db, NULL, 0) != 0) {
1339 mateusz.vi 577 
        goto IOERR;
1324 mateusz.vi 578 
      }
579 
      eolfound = 0;
580 
    }
1287 mateusz.vi 581 
 
1324 mateusz.vi 582 
    /* anything left? process the buffer leftover again */
583 
    if (consumedbytes < len) {
584 
      len -= consumedbytes;
585 
      buffptr += consumedbytes;
586 
      goto FINDLINE;
587 
    }
588 
 
589 
  }
590 
 
1287 mateusz.vi 591 
  _dos_close(fd);
592 
 
1321 mateusz.vi 593 
  SKIPLOADING:
594 
 
1320 mateusz.vi 595 
  /* add an empty line at end if not present already, also rewind cursor to top of file */
1339 mateusz.vi 596 
  if ((db->cursor == NULL) || (db->cursor->len != 0)) line_add(db, NULL, 0);
597 
  db_rewind(db);
1320 mateusz.vi 598 
 
1346 mateusz.vi 599 
  return(0);
1339 mateusz.vi 600 
 
601 
  IOERR:
602 
  _dos_close(fd);
1346 mateusz.vi 603 
  return(2);
1287 mateusz.vi 604 
}
605 
 
606 
 
1332 mateusz.vi 607 
static int savefile(const struct file *db, const char *newfname) {
1311 mateusz.vi 608 
  int fd;
609 
  const struct line far *l;
610 
  unsigned bytes;
1313 mateusz.vi 611 
  unsigned char eollen;
612 
  unsigned char eolbuf[2];
1332 mateusz.vi 613 
  int errflag = 0;
1313 mateusz.vi 614 
 
1332 mateusz.vi 615 
  /* either create a new file if newfname provided, or... */
616 
  if (newfname) {
617 
    if (_dos_creatnew(newfname, _A_NORMAL, &fd) != 0) return(-1);
618 
  } else { /* ...open db->fname */
619 
    if (_dos_open(db->fname, O_WRONLY, &fd) != 0) return(-1);
1311 mateusz.vi 620 
  }
621 
 
622 
  l = db->cursor;
623 
  while (l->prev) l = l->prev;
624 
 
1313 mateusz.vi 625 
  /* preset line terminators */
626 
  if (db->lfonly) {
627 
    eolbuf[0] = '\n';
628 
    eollen = 1;
629 
  } else {
630 
    eolbuf[0] = '\r';
631 
    eolbuf[1] = '\n';
632 
    eollen = 2;
633 
  }
634 
 
1311 mateusz.vi 635 
  while (l) {
1324 mateusz.vi 636 
    /* do not write the last empty line, it is only useful for edition */
637 
    if (l->len != 0) {
1332 mateusz.vi 638 
      errflag |= _dos_write(fd, l->payload, l->len, &bytes);
1324 mateusz.vi 639 
    } else if (l->next == NULL) {
640 
      break;
641 
    }
1332 mateusz.vi 642 
    errflag |= _dos_write(fd, eolbuf, eollen, &bytes);
1311 mateusz.vi 643 
    l = l->next;
644 
  }
645 
 
1332 mateusz.vi 646 
  errflag |= _dos_close(fd);
1330 mateusz.vi 647 
 
1332 mateusz.vi 648 
  return(errflag);
1311 mateusz.vi 649 
}
650 
 
651 
 
1327 mateusz.vi 652 
static void insert_in_line(struct file *db, const char *databuf, unsigned short len) {
1340 mateusz.vi 653 
  if (curline_resize(db, db->cursor->len + len) == 0) {
1317 mateusz.vi 654 
    unsigned short off = db->xoffset + db->cursorposx;
1351 mateusz.vi 655 
    db->modflag = '*';
1317 mateusz.vi 656 
    _fmemmove(db->cursor->payload + off + len, db->cursor->payload + off, db->cursor->len - off + 1);
657 
    db->cursor->len += len;
1327 mateusz.vi 658 
    uidirty.from = db->cursorposy;
659 
    uidirty.to = db->cursorposy;
1317 mateusz.vi 660 
    while (len--) {
661 
      db->cursor->payload[off++] = *databuf;
662 
      databuf++;
1327 mateusz.vi 663 
      cursor_right(db);
1317 mateusz.vi 664 
    }
665 
  }
666 
}
667 
 
668 
 
1342 mateusz.vi 669 
static void clear_file(struct file *db) {
670 
 
671 
  /* free the entire linked list of lines */
672 
  db_rewind(db);
673 
  while (db->cursor) {
674 
    struct line far *victim;
675 
    victim = db->cursor;
676 
    db->cursor = db->cursor->next;
677 
    line_free(victim);
678 
  }
679 
 
680 
  /* zero out the struct */
681 
  bzero(db, sizeof(struct file));
682 
}
683 
 
684 
 
1343 mateusz.vi 685 
/* recompute db->curline by counting nodes in linked list */
686 
static void recompute_curline(struct file *db) {
687 
  const struct line far *l = db->cursor;
688 
 
689 
  db->curline = 0;
690 
  while (l->prev != NULL) {
691 
    db->curline += 1;
692 
    l = l->prev;
693 
  }
694 
}
695 
 
696 
 
1354 mateusz.vi 697 
enum MENU_ACTION {
698 
  MENU_NONE = 0,
699 
  MENU_NEW = 1,
700 
  MENU_OPEN = 2,
701 
  MENU_SAVE = 3,
702 
  MENU_SAVEAS = 4,
703 
  MENU_CHGEOL = 5,
704 
  MENU_QUIT = 6
705 
};
706 
 
707 
static enum MENU_ACTION ui_menu(void) {
708 
  unsigned short i, curchoice, attr, x, slen;
709 
  uidirty.from = 0;
710 
  uidirty.to = 0xff;
711 
  uidirty.statusbar = 1;
712 
 
713 
  /* find out the longest string */
714 
  slen = 0;
715 
  for (i = MENU_NEW; i <= MENU_QUIT; i++) {
716 
    x = strlen(svarlang_str(8, i));
717 
    if (x > slen) slen = x;
718 
  }
719 
 
720 
  curchoice = MENU_NEW;
721 
  for (;;) {
722 
    /* render menu */
723 
    for (i = MENU_NONE; i <= MENU_QUIT + 1; i++) {
724 
      mdr_cout_char_rep(i, 0, ' ', SCHEME_MENU, slen+4);
725 
      if (i == curchoice) {
726 
        attr = SCHEME_MENU_CUR;
727 
        mdr_cout_char(i, 1, '>', SCHEME_MENU_SEL);
728 
      } else {
729 
        attr = SCHEME_MENU;
730 
      }
731 
      x = mdr_cout_str(i, 2, svarlang_str(8, i), attr, slen);
732 
      if (i == curchoice) {
733 
        mdr_cout_char_rep(i, x + 2, ' ', SCHEME_MENU_SEL, slen - x + 1);
734 
        mdr_cout_locate(i, x + 2);
735 
      }
736 
    }
737 
    /* wait for key */
738 
    switch (keyb_getkey()) {
739 
      case '\r': return(curchoice); /* ENTER */
740 
      case 0x150: /* down */
741 
        if (curchoice == MENU_QUIT) {
742 
          curchoice = MENU_NEW;
743 
        } else {
744 
          curchoice++;
745 
        }
746 
        break;
747 
      case 0x148: /* up */
748 
        if (curchoice == MENU_NEW) {
749 
          curchoice = MENU_QUIT;
750 
        } else {
751 
          curchoice--;
752 
        }
753 
        break;
754 
      default: return(MENU_NONE);
755 
    }
756 
  }
757 
}
758 
 
759 
 
1347 mateusz.vi 760 
/* main returns nothing, ie. sved always exits with a zero exit code
761 
 * (this saves 20 bytes of executable footprint) */
762 
void main(void) {
1354 mateusz.vi 763 
  static struct file dbarr[12];
1286 mateusz.vi 764 
  const char *fname;
1346 mateusz.vi 765 
  struct file *db = dbarr;
1275 mateusz.vi 766 
 
1307 mateusz.vi 767 
  {
768 
    char nlspath[128], lang[8];
769 
    svarlang_autoload_pathlist("sved", mdr_dos_getenv(nlspath, "NLSPATH", sizeof(nlspath)), mdr_dos_getenv(lang, "LANG", sizeof(lang)));
770 
  }
1282 mateusz.vi 771 
 
1286 mateusz.vi 772 
  fname = parseargv();
773 
 
1350 mateusz.vi 774 
  if ((fname == NULL) || (*fname == '/')) {
1302 mateusz.vi 775 
    mdr_coutraw_puts(svarlang_str(1,0)); /* usage: sved file.txt */
1347 mateusz.vi 776 
    return;
1275 mateusz.vi 777 
  }
778 
 
1282 mateusz.vi 779 
  /* load file */
1346 mateusz.vi 780 
  {
781 
    unsigned char err = loadfile(db, fname);
782 
    if (err == 1) {
783 
      mdr_coutraw_puts(svarlang_str(0,11)); /* file not found */
1347 mateusz.vi 784 
      return;
1346 mateusz.vi 785 
    } else if (err != 0) {
786 
      mdr_coutraw_puts(svarlang_str(0,10)); /* ERROR */
1347 mateusz.vi 787 
      return;
1346 mateusz.vi 788 
    }
789 
  }
1282 mateusz.vi 790 
 
1333 mateusz.vi 791 
  if (mdr_cout_init(&screenw, &screenh)) {
792 
    /* load color scheme if mdr_cout_init returns a color flag */
793 
    SCHEME_TEXT = 0x17;
1354 mateusz.vi 794 
    SCHEME_MENU = 0x70;
795 
    SCHEME_MENU_CUR = 0x2f;
796 
    SCHEME_MENU_SEL = 0x22;
1333 mateusz.vi 797 
    SCHEME_STBAR1 = 0x70;
798 
    SCHEME_STBAR2 = 0x78;
799 
    SCHEME_STBAR3 = 0xf0;
800 
    SCHEME_SCROLL = 0x70;
801 
    SCHEME_MSG = 0xf0;
802 
    SCHEME_ERR = 0x4f;
803 
  }
1275 mateusz.vi 804 
 
805 
  for (;;) {
806 
    int k;
807 
 
1327 mateusz.vi 808 
    check_cursor_not_after_eol(db);
1320 mateusz.vi 809 
    mdr_cout_locate(db->cursorposy, db->cursorposx);
1275 mateusz.vi 810 
 
1327 mateusz.vi 811 
    if (uidirty.from != 0xff) {
812 
      ui_refresh(db);
813 
      uidirty.from = 0xff;
1282 mateusz.vi 814 
    }
1342 mateusz.vi 815 
    if (uidirty.statusbar) {
816 
      ui_basic(db);
817 
      uidirty.statusbar = 0;
818 
    }
1328 mateusz.vi 819 
#ifdef DBG_LINENUM
820 
      {
821 
        char ddd[10];
822 
        db->curline += 1;
823 
        ddd[0] = '0' + db->curline / 100;
824 
        ddd[1] = '0' + (db->curline % 100) / 10;
825 
        ddd[2] = '0' + (db->curline % 10);
826 
        db->curline -= 1;
827 
        ddd[3] = '/';
828 
        ddd[4] = '0' + db->totlines / 100;
829 
        ddd[5] = '0' + (db->totlines % 100) / 10;
830 
        ddd[6] = '0' + (db->totlines % 10);
831 
        ddd[7] = 0;
1333 mateusz.vi 832 
        mdr_cout_str(screenh - 1, 40, ddd, SCHEME_STBAR1, sizeof(ddd));
1328 mateusz.vi 833 
      }
834 
#endif
1275 mateusz.vi 835 
 
836 
    k = keyb_getkey();
1282 mateusz.vi 837 
 
1275 mateusz.vi 838 
    if (k == 0x150) { /* down */
1327 mateusz.vi 839 
      cursor_down(db);
1275 mateusz.vi 840 
 
841 
    } else if (k == 0x148) { /* up */
1327 mateusz.vi 842 
      cursor_up(db);
1275 mateusz.vi 843 
 
844 
    } else if (k == 0x14D) { /* right */
1327 mateusz.vi 845 
      cursor_right(db);
1275 mateusz.vi 846 
 
847 
    } else if (k == 0x14B) { /* left */
1327 mateusz.vi 848 
      cursor_left(db);
1275 mateusz.vi 849 
 
1282 mateusz.vi 850 
    } else if (k == 0x149) { /* pgup */
1334 mateusz.vi 851 
      unsigned char dist = db->cursorposy + screenh - 1;
852 
      while ((dist != 0) && (db->cursor->prev != NULL)) {
853 
        db->cursor = db->cursor->prev;
854 
        dist--;
855 
      }
856 
      if (dist != 0) {
857 
        db->cursorposy = 0;
858 
        db->cursorposx = 0;
859 
      } else {
860 
        dist = db->cursorposy;
861 
        while ((dist--) && (db->cursor->next)) db->cursor = db->cursor->next;
862 
      }
863 
      uidirty.from = 0;
864 
      uidirty.to = 0xff;
1343 mateusz.vi 865 
      recompute_curline(db);
1282 mateusz.vi 866 
 
867 
    } else if (k == 0x151) { /* pgdown */
1334 mateusz.vi 868 
      unsigned char dist = screenh + screenh - db->cursorposy - 3;
869 
      while ((dist != 0) && (db->cursor->next != NULL)) {
870 
        db->cursor = db->cursor->next;
871 
        dist--;
872 
      }
873 
      if (dist != 0) {
874 
        db->cursorposy = screenh - 2;
875 
        if (db->totlines <= db->cursorposy) db->cursorposy = db->totlines - 1;
876 
        db->cursorposx = 0;
877 
      } else {
878 
        dist = screenh - 2 - db->cursorposy;
879 
        while ((dist--) && (db->cursor->prev)) db->cursor = db->cursor->prev;
880 
      }
881 
      uidirty.from = 0;
882 
      uidirty.to = 0xff;
1343 mateusz.vi 883 
      recompute_curline(db);
1282 mateusz.vi 884 
 
885 
    } else if (k == 0x147) { /* home */
1327 mateusz.vi 886 
       cursor_home(db);
1282 mateusz.vi 887 
 
888 
    } else if (k == 0x14F) { /* end */
1327 mateusz.vi 889 
       cursor_eol(db);
1282 mateusz.vi 890 
 
1275 mateusz.vi 891 
    } else if (k == 0x1B) { /* ESC */
1354 mateusz.vi 892 
      int quitnow = 0;
893 
      char fname[25];
894 
      int saveflag = 0;
1275 mateusz.vi 895 
 
1354 mateusz.vi 896 
      switch (ui_menu()) {
897 
 
898 
        case MENU_NONE:
899 
          break;
900 
 
901 
        case MENU_NEW:
902 
          if (ui_confirm_if_unsaved(db) == 0) {
903 
            clear_file(db);
904 
            /* add a single empty line */
905 
            line_add(db, NULL, 0);
906 
          }
907 
          uidirty.statusbar = 1;
908 
          break;
909 
 
910 
        case MENU_OPEN:
911 
          /* display a warning if unsaved changes are pending */
912 
          if (db->modflag != 0) ui_msg(svarlang_str(0,4), svarlang_str(0,8), SCHEME_MSG);
913 
 
914 
          /* ask for filename */
915 
          ui_getstring(svarlang_str(0,7), fname, sizeof(fname));
916 
          if (fname[0] != 0) {
917 
            unsigned char err;
918 
            clear_file(db);
919 
            err = loadfile(db, fname);
920 
            if (err != 0) {
921 
              if (err == 1) {
922 
                ui_msg(svarlang_str(0,11), NULL, SCHEME_ERR); /* file not found */
923 
              } else {
924 
                ui_msg(svarlang_str(0,10), NULL, SCHEME_ERR);  /* ERROR */
925 
              }
926 
              mdr_bios_tickswait(44); /* 3s */
927 
              clear_file(db);
928 
            }
929 
          }
930 
          break;
931 
 
932 
        case MENU_SAVEAS:
933 
          saveflag = 1;
934 
          /* FALLTHRU */
935 
        case MENU_SAVE:
936 
          if ((saveflag != 0) || (db->fname[0] == 0)) { /* save as... */
937 
            ui_getstring(svarlang_str(0,6), fname, sizeof(fname));
938 
            if (*fname == 0) break;
939 
            saveflag = savefile(db, fname);
940 
            if (saveflag == 0) memcpy(db->fname, fname, sizeof(fname));
941 
          } else {
942 
            saveflag = savefile(db, NULL);
943 
          }
944 
 
945 
          if (saveflag == 0) {
946 
            db->modflag = 0;
947 
            ui_msg(svarlang_str(0, 2), NULL, SCHEME_MSG);
948 
            mdr_bios_tickswait(11); /* 11 ticks is about 600 ms */
949 
          } else {
950 
            ui_msg(svarlang_str(0, 3), NULL, SCHEME_ERR);
951 
            mdr_bios_tickswait(36); /* 2s */
952 
          }
953 
          break;
954 
 
955 
        case MENU_CHGEOL:
956 
          db->modflag = '*';
957 
          db->lfonly ^= 1;
958 
          break;
959 
 
960 
        case MENU_QUIT:
961 
          if (ui_confirm_if_unsaved(db) == 0) quitnow = 1;
962 
          break;
963 
      }
964 
 
965 
      if (quitnow) break;
966 
 
1289 mateusz.vi 967 
    } else if (k == 0x0D) { /* ENTER */
1328 mateusz.vi 968 
      unsigned short off = db->xoffset + db->cursorposx;
1289 mateusz.vi 969 
      /* add a new line */
1328 mateusz.vi 970 
      if (line_add(db, db->cursor->payload + off, db->cursor->len - off) == 0) {
1351 mateusz.vi 971 
        db->modflag = '*';
1328 mateusz.vi 972 
        db->cursor = db->cursor->prev; /* back to original line */
1289 mateusz.vi 973 
        /* trim the line above */
1328 mateusz.vi 974 
        db->cursor->len = off;
1289 mateusz.vi 975 
        /* move cursor to the (new) line below */
1343 mateusz.vi 976 
        db->curline -= 1;
1328 mateusz.vi 977 
        uidirty.from = db->cursorposy;
1327 mateusz.vi 978 
        uidirty.to = 0xff;
1328 mateusz.vi 979 
        cursor_down(db);
980 
        cursor_home(db);
1289 mateusz.vi 981 
      } else {
982 
        /* ERROR: OUT OF MEMORY */
983 
      }
984 
 
1292 mateusz.vi 985 
    } else if (k == 0x153) {  /* DEL */
1327 mateusz.vi 986 
      del(db);
1292 mateusz.vi 987 
 
1302 mateusz.vi 988 
    } else if (k == 0x008) { /* BKSPC */
1327 mateusz.vi 989 
      bkspc(db);
1302 mateusz.vi 990 
 
1308 mateusz.vi 991 
    } else if ((k >= 0x20) && (k <= 0xff)) { /* "normal" character */
1317 mateusz.vi 992 
      char c = k;
1327 mateusz.vi 993 
      insert_in_line(db, &c, 1);
1308 mateusz.vi 994 
 
1317 mateusz.vi 995 
    } else if (k == 0x009) { /* TAB */
1348 mateusz.vi 996 
      insert_in_line(db, "        ", 8);
1317 mateusz.vi 997 
 
1354 mateusz.vi 998 
    } else if ((k >= 0x13b) && (k <= 0x146)) { /* F1..F12 */
1327 mateusz.vi 999 
      uidirty.from = 0;
1000 
      uidirty.to = 0xff;
1309 mateusz.vi 1001 
 
1325 mateusz.vi 1002 
    } else if (k == 0x174) { /* CTRL+ArrRight - jump to next word */
1003 
      /* if currently cursor is on a non-space, then fast-forward to nearest space or EOL */
1004 
      for (;;) {
1005 
        if (db->xoffset + db->cursorposx == db->cursor->len) break;
1006 
        if (db->cursor->payload[db->xoffset + db->cursorposx] == ' ') break;
1327 mateusz.vi 1007 
        cursor_right(db);
1325 mateusz.vi 1008 
      }
1009 
      /* now skip to next non-space or end of file */
1010 
      for (;;) {
1327 mateusz.vi 1011 
        cursor_right(db);
1325 mateusz.vi 1012 
        if (db->cursor->payload[db->xoffset + db->cursorposx] != ' ') break;
1013 
        if ((db->cursor->next == NULL) && (db->cursorposx + db->xoffset == db->cursor->len)) break;
1014 
      }
1015 
 
1016 
    } else if (k == 0x173) { /* CTRL+ArrLeft - jump to prev word */
1327 mateusz.vi 1017 
      cursor_left(db);
1325 mateusz.vi 1018 
      /* if currently cursor is on a space, then fast-forward to nearest non-space or start of line */
1019 
      for (;;) {
1020 
        if ((db->xoffset == 0) && (db->cursorposx == 0)) break;
1021 
        if (db->cursor->payload[db->xoffset + db->cursorposx] != ' ') break;
1327 mateusz.vi 1022 
        cursor_left(db);
1325 mateusz.vi 1023 
      }
1024 
      /* now skip to next space or start of file */
1025 
      for (;;) {
1327 mateusz.vi 1026 
        cursor_left(db);
1325 mateusz.vi 1027 
        if (db->cursor->payload[db->xoffset + db->cursorposx] == ' ') {
1327 mateusz.vi 1028 
          cursor_right(db);
1325 mateusz.vi 1029 
          break;
1030 
        }
1031 
        if ((db->cursorposx == 0) && (db->xoffset == 0)) break;
1032 
      }
1033 
 
1333 mateusz.vi 1034 
#ifdef DBG_UNHKEYS
1282 mateusz.vi 1035 
    } else { /* UNHANDLED KEY - TODO IGNORE THIS IN PRODUCTION RELEASE */
1036 
      char buff[4];
1037 
      const char *HEX = "0123456789ABCDEF";
1038 
      buff[0] = HEX[(k >> 8) & 15];
1039 
      buff[1] = HEX[(k >> 4) & 15];
1040 
      buff[2] = HEX[k & 15];
1333 mateusz.vi 1041 
      mdr_cout_str(screenh - 1, 0, "UNHANDLED KEY: 0x", SCHEME_STBAR1, 17);
1042 
      mdr_cout_str(screenh - 1, 17, buff, SCHEME_STBAR1, 3);
1275 mateusz.vi 1043 
      keyb_getkey();
1044 
      break;
1333 mateusz.vi 1045 
#endif
1275 mateusz.vi 1046 
    }
1047 
  }
1048 
 
1049 
  mdr_cout_close();
1050 
 
1320 mateusz.vi 1051 
  /* no need to free memory, DOS will do it for me */
1275 mateusz.vi 1052 
 
1347 mateusz.vi 1053 
  return;
1275 mateusz.vi 1054 
}