Subversion Repositories SvarDOS

Rev

Rev 1423 | Rev 1426 | 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 
 
1282 mateusz.vi 34 
#include "svarlang\svarlang.h"
35 
 
1326 mateusz.vi 36 
 
1356 mateusz.vi 37 
#define PVER "2023.0"
38 
#define PDATE "2023"
39 
 
1326 mateusz.vi 40 
/*****************************************************************************
41 
 * global variables and definitions                                          *
42 
 *****************************************************************************/
43 
 
1275 mateusz.vi 44 
/* preload the mono scheme (to be overloaded at runtime if color adapter present) */
1333 mateusz.vi 45 
static unsigned char SCHEME_TEXT   = 0x07,
1354 mateusz.vi 46 
                     SCHEME_MENU   = 0x70,
47 
                     SCHEME_MENU_CUR= 0x0f,
48 
                     SCHEME_MENU_SEL= 0x00,
1333 mateusz.vi 49 
                     SCHEME_STBAR1 = 0x70,
1358 mateusz.vi 50 
                     SCHEME_STBAR2 = 0x70, /* greyed out information */
51 
                     SCHEME_STBAR3 = 0x70, /* query */
1333 mateusz.vi 52 
                     SCHEME_SCROLL = 0x70,
53 
                     SCHEME_MSG    = 0x70,
1358 mateusz.vi 54 
                     SCHEME_ERR    = 0x70;
1327 mateusz.vi 55 
 
1326 mateusz.vi 56 
static unsigned char screenw, screenh;
1412 mateusz.vi 57 
static unsigned char glob_monomode, glob_tablessmode;
1275 mateusz.vi 58 
 
1327 mateusz.vi 59 
static struct {
60 
    unsigned char from;
61 
    unsigned char to;
1342 mateusz.vi 62 
    unsigned char statusbar;
63 
} uidirty = {0, 0xff, 1}; /* make sure to redraw entire UI at first run */
1327 mateusz.vi 64 
 
1275 mateusz.vi 65 
#define SCROLL_CURSOR 0xB1
66 
 
67 
struct line {
1288 mateusz.vi 68 
  struct line far *prev;
69 
  struct line far *next;
1275 mateusz.vi 70 
  unsigned short len;
71 
  char payload[1];
72 
};
73 
 
1315 mateusz.vi 74 
struct file {
1288 mateusz.vi 75 
  struct line far *cursor;
1275 mateusz.vi 76 
  unsigned short xoffset;
1348 mateusz.vi 77 
  unsigned short cursorposx;
78 
  unsigned short cursorposy;
1328 mateusz.vi 79 
  unsigned short totlines;
80 
  unsigned short curline;
1330 mateusz.vi 81 
  char lfonly;   /* set if line endings are LF (CR/LF otherwise) */
82 
  char modflag;  /* non-zero if file has been modified since last save */
1355 mateusz.vi 83 
  char modflagprev;
1332 mateusz.vi 84 
  char fname[128];
1275 mateusz.vi 85 
};
86 
 
87 
 
1326 mateusz.vi 88 
/*****************************************************************************
89 
 * functions                                                                 *
90 
 *****************************************************************************/
91 
 
1339 mateusz.vi 92 
static struct line far *line_calloc(unsigned short siz) {
1342 mateusz.vi 93 
  struct line far *res;
1339 mateusz.vi 94 
  unsigned int seg;
1341 mateusz.vi 95 
  if (_dos_allocmem((sizeof(struct line) + siz + 15) / 16, &seg) != 0) return(NULL);
1342 mateusz.vi 96 
  res = MK_FP(seg, 0);
97 
  _fmemset(res, 0, sizeof(struct line) + siz);
1339 mateusz.vi 98 
  return(MK_FP(seg, 0));
99 
}
100 
 
101 
 
102 
static void line_free(struct line far *ptr) {
103 
  _dos_freemem(FP_SEG(ptr));
104 
}
105 
 
106 
 
1348 mateusz.vi 107 
static int curline_resize(struct file far *db, unsigned short newsiz) {
1339 mateusz.vi 108 
  unsigned int maxavail;
109 
  struct line far *newptr;
110 
 
1341 mateusz.vi 111 
  /* try resizing the block (much faster) */
112 
  if (_dos_setblock((sizeof(struct line) + newsiz + 15) / 16, FP_SEG(db->cursor), &maxavail) == 0) return(0);
1339 mateusz.vi 113 
 
114 
  /* create a new block and copy data over */
115 
  newptr = line_calloc(newsiz);
1340 mateusz.vi 116 
  if (newptr == NULL) return(-1);
117 
  _fmemmove(newptr, db->cursor, sizeof(struct line) + db->cursor->len);
118 
 
119 
  /* rewire the linked list */
120 
  db->cursor = newptr;
121 
  if (newptr->next) newptr->next->prev = newptr;
122 
  if (newptr->prev) newptr->prev->next = newptr;
123 
 
124 
  return(0);
1339 mateusz.vi 125 
}
126 
 
127 
 
1328 mateusz.vi 128 
/* adds a new line at cursor position into file linked list and advance cursor
1324 mateusz.vi 129 
 * returns non-zero on error */
1328 mateusz.vi 130 
static int line_add(struct file *db, const char far *line, unsigned short slen) {
1288 mateusz.vi 131 
  struct line far *l;
1275 mateusz.vi 132 
 
1339 mateusz.vi 133 
  l = line_calloc(slen);
1287 mateusz.vi 134 
  if (l == NULL) return(-1);
135 
 
1275 mateusz.vi 136 
  l->prev = db->cursor;
137 
  if (db->cursor) {
138 
    l->next = db->cursor->next;
139 
    db->cursor->next = l;
140 
    l->next->prev = l;
141 
  }
142 
  db->cursor = l;
1342 mateusz.vi 143 
  if (slen > 0) {
144 
    _fmemmove(l->payload, line, slen);
145 
    l->len = slen;
146 
  }
1287 mateusz.vi 147 
 
1328 mateusz.vi 148 
  db->totlines += 1;
149 
  db->curline += 1;
150 
 
1287 mateusz.vi 151 
  return(0);
1275 mateusz.vi 152 
}
153 
 
154 
 
1348 mateusz.vi 155 
static void ui_getstring(const char *query, char *s, unsigned short maxlen) {
156 
  unsigned short len = 0;
157 
  unsigned char y, x;
1332 mateusz.vi 158 
  int k;
159 
 
160 
  if (maxlen == 0) return;
161 
  maxlen--; /* make room for the nul terminator */
162 
 
163 
  y = screenh - 1;
164 
 
165 
  /* print query string */
1333 mateusz.vi 166 
  x = mdr_cout_str(y, 0, query, SCHEME_STBAR3, 40);
167 
  mdr_cout_char_rep(y, x++, ' ', SCHEME_STBAR3, screenw - x);
1332 mateusz.vi 168 
 
169 
  for (;;) {
170 
    mdr_cout_locate(y, x + len);
1410 mateusz.vi 171 
    k = mdr_dos_getkey2();
1332 mateusz.vi 172 
 
1345 mateusz.vi 173 
    switch (k) {
174 
      case 0x1b: /* ESC */
175 
        s[0] = 0;
176 
        return;
177 
      case '\r':
178 
        s[len] = 0;
179 
        return;
180 
      case 0x08: /* BKSPC */
181 
        if (len > 0) {
182 
          len--;
183 
          mdr_cout_char(y, x + len, ' ', SCHEME_STBAR3);
184 
        }
185 
        break;
186 
      default:
187 
        if ((k <= 0xff) && (k >= ' ') && (len < maxlen)) {
188 
          mdr_cout_char(y, x + len, k, SCHEME_STBAR3);
189 
          s[len++] = k;
190 
        }
1332 mateusz.vi 191 
    }
1345 mateusz.vi 192 
  }
1332 mateusz.vi 193 
 
194 
}
195 
 
196 
 
1324 mateusz.vi 197 
/* append a nul-terminated string to line at cursor position */
198 
static int line_append(struct file *f, const char far *buf, unsigned short len) {
199 
  if (sizeof(struct line) + f->cursor->len + len < len) return(-1); /* overflow check */
1340 mateusz.vi 200 
  if (curline_resize(f, f->cursor->len + len) != 0) return(-1);
1337 mateusz.vi 201 
  _fmemmove(f->cursor->payload + f->cursor->len, buf, len);
1324 mateusz.vi 202 
  f->cursor->len += len;
203 
 
204 
  return(0);
205 
}
206 
 
207 
 
1315 mateusz.vi 208 
static void db_rewind(struct file *db) {
1275 mateusz.vi 209 
  if (db->cursor == NULL) return;
210 
  while (db->cursor->prev) db->cursor = db->cursor->prev;
1328 mateusz.vi 211 
  db->curline = 0;
1275 mateusz.vi 212 
}
213 
 
214 
 
1355 mateusz.vi 215 
static void ui_basic(const struct file *db, unsigned short slotnum) {
1356 mateusz.vi 216 
  const char *s = svarlang_strid(0); /* ESC=MENU */
1348 mateusz.vi 217 
  unsigned short helpcol = screenw - strlen(s);
1394 mateusz.vi 218 
  unsigned short maxfnlen = helpcol - 14;
1275 mateusz.vi 219 
 
1425 mateusz.vi 220 
  /* slot number (guaranteed to be 0-9) */
1355 mateusz.vi 221 
  {
222 
    char slot[4] = "#00";
1425 mateusz.vi 223 
    if (slotnum == 9) {
224 
      slot[1] = '1';
225 
    } else {
226 
      slotnum++;
227 
      slot[2] += slotnum;
228 
    }
1355 mateusz.vi 229 
    mdr_cout_str(screenh - 1, 0, slot, SCHEME_STBAR2, 3);
230 
  }
1313 mateusz.vi 231 
 
1355 mateusz.vi 232 
  /* fill rest of status bar with background */
1425 mateusz.vi 233 
  mdr_cout_char_rep(screenh - 1, 3, ' ', SCHEME_STBAR1, helpcol - 3);
1355 mateusz.vi 234 
 
1393 mateusz.vi 235 
  /* filename and modflag */
1330 mateusz.vi 236 
  {
1394 mateusz.vi 237 
    const char *fn;
1355 mateusz.vi 238 
    unsigned short x;
1394 mateusz.vi 239 
    if (db->fname[0] == 0) {
240 
      fn = svarlang_str(0, 1); /* "UNTITLED" */
241 
    } else {
242 
      /* display filename up to maxfnlen chars */
243 
      fn = db->fname;
244 
      x = strlen(fn);
245 
      if (x > maxfnlen) fn += x - maxfnlen;
246 
    }
247 
    x = mdr_cout_str(screenh - 1, 4, fn, SCHEME_STBAR1, maxfnlen);
1393 mateusz.vi 248 
    if (db->modflag) mdr_cout_char(screenh - 1, 5 + x, '!', SCHEME_STBAR2);
1321 mateusz.vi 249 
  }
1313 mateusz.vi 250 
 
251 
  /* eol type */
1330 mateusz.vi 252 
  {
253 
    const char *eoltype = "CRLF";
1353 mateusz.vi 254 
    if (db->lfonly) eoltype += 2;
1335 mateusz.vi 255 
    mdr_cout_str(screenh - 1, helpcol - 6, eoltype, SCHEME_STBAR1, 5);
1275 mateusz.vi 256 
  }
1313 mateusz.vi 257 
 
1335 mateusz.vi 258 
  mdr_cout_str(screenh - 1, helpcol, s, SCHEME_STBAR2, 40);
1275 mateusz.vi 259 
}
260 
 
261 
 
1331 mateusz.vi 262 
static void ui_msg(const char *msg1, const char *msg2, unsigned char attr) {
1312 mateusz.vi 263 
  unsigned short x, y, msglen, i;
1331 mateusz.vi 264 
  unsigned char msg2flag = 0;
265 
 
266 
  msglen = strlen(msg1);
267 
  if (msg2) {
268 
    msg2flag = 1;
269 
    i = strlen(msg2);
270 
    if (i > msglen) msglen = i;
271 
  }
272 
 
273 
  y = (screenh - 6) >> 1;
1312 mateusz.vi 274 
  x = (screenw - msglen - 4) >> 1;
1331 mateusz.vi 275 
  for (i = y+2+msg2flag; i >= y; i--) mdr_cout_char_rep(i, x, ' ', attr, msglen + 2);
276 
  x++;
1345 mateusz.vi 277 
 
1331 mateusz.vi 278 
  mdr_cout_str(y+1, x, msg1, attr, msglen);
279 
  if (msg2) mdr_cout_str(y+2, x, msg2, attr, msglen);
1312 mateusz.vi 280 
 
1327 mateusz.vi 281 
  if (uidirty.from > y) uidirty.from = y;
1331 mateusz.vi 282 
  if (uidirty.to < y+4) uidirty.to = y+4;
1312 mateusz.vi 283 
}
284 
 
285 
 
1412 mateusz.vi 286 
static unsigned char ui_confirm_if_unsaved(const struct file *db) {
1355 mateusz.vi 287 
  unsigned char r = 0;
1342 mateusz.vi 288 
  if (db->modflag == 0) return(0);
289 
 
1355 mateusz.vi 290 
  mdr_cout_cursor_hide();
291 
 
1342 mateusz.vi 292 
  /* if file has been modified then ask for confirmation */
293 
  ui_msg(svarlang_str(0,4), svarlang_str(0,5), SCHEME_MSG);
1410 mateusz.vi 294 
  if (mdr_dos_getkey2() != '\r') r = 1;
1342 mateusz.vi 295 
 
1355 mateusz.vi 296 
  mdr_cout_cursor_show();
297 
 
298 
  return(r);
1342 mateusz.vi 299 
}
300 
 
301 
 
1327 mateusz.vi 302 
static void ui_refresh(const struct file *db) {
1318 mateusz.vi 303 
  unsigned char x;
1310 mateusz.vi 304 
  const struct line far *l;
1316 mateusz.vi 305 
  unsigned char y = db->cursorposy;
1275 mateusz.vi 306 
 
1392 mateusz.vi 307 
  /* quit early if nothing to refresh */
308 
  if (uidirty.from == 0xff) return;
309 
 
1288 mateusz.vi 310 
#ifdef DBG_REFRESH
1282 mateusz.vi 311 
  static char m = 'a';
312 
  m++;
313 
  if (m > 'z') m = 'a';
1288 mateusz.vi 314 
#endif
1282 mateusz.vi 315 
 
1310 mateusz.vi 316 
  /* rewind cursor line to first line that needs redrawing */
1327 mateusz.vi 317 
  for (l = db->cursor; y > uidirty.from; y--) l = l->prev;
1282 mateusz.vi 318 
 
1310 mateusz.vi 319 
  /* iterate over lines and redraw whatever needs to be redrawn */
320 
  for (; l != NULL; l = l->next, y++) {
321 
 
322 
    /* skip lines that do not need to be refreshed */
1327 mateusz.vi 323 
    if (y < uidirty.from) continue;
324 
    if (y > uidirty.to) break;
1282 mateusz.vi 325 
 
1318 mateusz.vi 326 
    x = 0;
1275 mateusz.vi 327 
    if (db->xoffset < l->len) {
1318 mateusz.vi 328 
      unsigned char i, limit;
329 
      if (l->len - db->xoffset < screenw) {
330 
        limit = l->len;
331 
      } else {
332 
        limit = db->xoffset + screenw - 1;
333 
      }
1333 mateusz.vi 334 
      for (i = db->xoffset; i < limit; i++) mdr_cout_char(y, x++, l->payload[i], SCHEME_TEXT);
1275 mateusz.vi 335 
    }
1282 mateusz.vi 336 
 
1318 mateusz.vi 337 
    /* write empty spaces until end of line */
1333 mateusz.vi 338 
    if (x < screenw - 1) mdr_cout_char_rep(y, x, ' ', SCHEME_TEXT, screenw - 1 - x);
1318 mateusz.vi 339 
 
1288 mateusz.vi 340 
#ifdef DBG_REFRESH
1333 mateusz.vi 341 
    mdr_cout_char(y, 0, m, SCHEME_STBAR1);
1288 mateusz.vi 342 
#endif
1282 mateusz.vi 343 
 
1275 mateusz.vi 344 
    if (y == screenh - 2) break;
345 
  }
1310 mateusz.vi 346 
 
1319 mateusz.vi 347 
  /* fill all lines below if empty (and they need to be redrawn) */
348 
  if (l == NULL) {
1327 mateusz.vi 349 
    while ((y < screenh - 1) && (y < uidirty.to)) {
1333 mateusz.vi 350 
      mdr_cout_char_rep(y++, 0, ' ', SCHEME_TEXT, screenw - 1);
1319 mateusz.vi 351 
    }
1318 mateusz.vi 352 
  }
1328 mateusz.vi 353 
 
354 
  /* scroll bar */
355 
  for (y = 0; y < (screenh - 1); y++) {
1333 mateusz.vi 356 
    mdr_cout_char(y, screenw - 1, SCROLL_CURSOR, SCHEME_SCROLL);
1328 mateusz.vi 357 
  }
358 
 
359 
  /* scroll cursor */
360 
  if (db->totlines >= screenh) {
361 
    unsigned short topline = db->curline - db->cursorposy;
362 
    unsigned short col;
363 
    unsigned short totlines = db->totlines - screenh + 1;
364 
    if (db->totlines - screenh > screenh) {
365 
      col = topline / (totlines / (screenh - 1));
366 
    } else {
367 
      col = topline * (screenh - 1) / totlines;
368 
    }
369 
    if (col >= screenh - 1) col = screenh - 2;
1333 mateusz.vi 370 
    mdr_cout_char(col, screenw - 1, ' ', SCHEME_SCROLL);
1328 mateusz.vi 371 
  }
1392 mateusz.vi 372 
 
373 
  /* clear out the dirty flag */
374 
  uidirty.from = 0xff;
1275 mateusz.vi 375 
}
376 
 
377 
 
1327 mateusz.vi 378 
static void check_cursor_not_after_eol(struct file *db) {
1316 mateusz.vi 379 
  if (db->xoffset + db->cursorposx <= db->cursor->len) return;
1275 mateusz.vi 380 
 
381 
  if (db->cursor->len < db->xoffset) {
1316 mateusz.vi 382 
    db->cursorposx = 0;
1275 mateusz.vi 383 
    db->xoffset = db->cursor->len;
1327 mateusz.vi 384 
    uidirty.from = 0;
385 
    uidirty.to = 0xff;
1275 mateusz.vi 386 
  } else {
1316 mateusz.vi 387 
    db->cursorposx = db->cursor->len - db->xoffset;
1275 mateusz.vi 388 
  }
389 
}
390 
 
391 
 
1327 mateusz.vi 392 
static void cursor_up(struct file *db) {
1422 mateusz.vi 393 
 
394 
  if (db->cursor->prev == NULL) return;
395 
 
396 
  db->curline -= 1;
397 
  db->cursor = db->cursor->prev;
398 
  if (db->cursorposy == 0) {
399 
    uidirty.from = 0;
400 
    uidirty.to = 0xff;
401 
  } else {
402 
    db->cursorposy -= 1;
1275 mateusz.vi 403 
  }
404 
}
405 
 
406 
 
1327 mateusz.vi 407 
static void cursor_eol(struct file *db) {
1275 mateusz.vi 408 
  /* adjust xoffset to make sure eol is visible on screen */
1282 mateusz.vi 409 
  if (db->xoffset > db->cursor->len) {
410 
    db->xoffset = db->cursor->len - 1;
1327 mateusz.vi 411 
    uidirty.from = 0;
412 
    uidirty.to = 0xff;
1282 mateusz.vi 413 
  }
414 
 
415 
  if (db->xoffset + screenw - 1 <= db->cursor->len) {
416 
    db->xoffset = db->cursor->len - screenw + 2;
1327 mateusz.vi 417 
    uidirty.from = 0;
418 
    uidirty.to = 0xff;
1282 mateusz.vi 419 
  }
1316 mateusz.vi 420 
  db->cursorposx = db->cursor->len - db->xoffset;
1275 mateusz.vi 421 
}
422 
 
423 
 
1327 mateusz.vi 424 
static void cursor_down(struct file *db) {
1422 mateusz.vi 425 
 
426 
  if (db->cursor->next == NULL) return;
427 
 
428 
  db->curline += 1;
429 
  db->cursor = db->cursor->next;
430 
  if (db->cursorposy < screenh - 2) {
431 
    db->cursorposy += 1;
432 
  } else {
433 
    uidirty.from = 0;
434 
    uidirty.to = 0xff;
1276 mateusz.vi 435 
  }
436 
}
437 
 
438 
 
1327 mateusz.vi 439 
static void cursor_left(struct file *db) {
1316 mateusz.vi 440 
  if (db->cursorposx > 0) {
441 
    db->cursorposx -= 1;
1302 mateusz.vi 442 
  } else if (db->xoffset > 0) {
443 
    db->xoffset -= 1;
1327 mateusz.vi 444 
    uidirty.from = 0;
445 
    uidirty.to = 0xff;
1302 mateusz.vi 446 
  } else if (db->cursor->prev != NULL) { /* jump to end of line above */
1327 mateusz.vi 447 
    cursor_up(db);
448 
    cursor_eol(db);
1302 mateusz.vi 449 
  }
450 
}
451 
 
452 
 
1327 mateusz.vi 453 
static void cursor_home(struct file *db) {
1316 mateusz.vi 454 
  db->cursorposx = 0;
1282 mateusz.vi 455 
  if (db->xoffset != 0) {
456 
    db->xoffset = 0;
1327 mateusz.vi 457 
    uidirty.from = 0;
458 
    uidirty.to = 0xff;
1282 mateusz.vi 459 
  }
1276 mateusz.vi 460 
}
461 
 
462 
 
1327 mateusz.vi 463 
static void cursor_right(struct file *db) {
1316 mateusz.vi 464 
  if (db->cursor->len > db->xoffset + db->cursorposx) {
465 
    if (db->cursorposx < screenw - 2) {
466 
      db->cursorposx += 1;
1308 mateusz.vi 467 
    } else {
468 
      db->xoffset += 1;
1327 mateusz.vi 469 
      uidirty.from = 0;
470 
      uidirty.to = 0xff;
1308 mateusz.vi 471 
    }
1357 mateusz.vi 472 
  } else if (db->cursor->next != NULL) { /* jump to start of next line */
1327 mateusz.vi 473 
    cursor_down(db);
474 
    cursor_home(db);
1308 mateusz.vi 475 
  }
476 
}
477 
 
478 
 
1327 mateusz.vi 479 
static void del(struct file *db) {
1316 mateusz.vi 480 
  if (db->cursorposx + db->xoffset < db->cursor->len) {
481 
    _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 482 
    db->cursor->len -= 1; /* do this AFTER memmove so the copy includes the nul terminator */
1327 mateusz.vi 483 
    uidirty.from = db->cursorposy;
484 
    uidirty.to = db->cursorposy;
1393 mateusz.vi 485 
    db->modflag = 1;
1292 mateusz.vi 486 
  } else if (db->cursor->next != NULL) { /* cursor is at end of line: merge current line with next one (if there is a next one) */
487 
    struct line far *nextline = db->cursor->next;
488 
    if (db->cursor->next->len > 0) {
1340 mateusz.vi 489 
      if (curline_resize(db, db->cursor->len + db->cursor->next->len + 1) == 0) {
1337 mateusz.vi 490 
        _fmemmove(db->cursor->payload + db->cursor->len, db->cursor->next->payload, db->cursor->next->len + 1);
1292 mateusz.vi 491 
        db->cursor->len += db->cursor->next->len;
492 
      }
493 
    }
1340 mateusz.vi 494 
 
1292 mateusz.vi 495 
    db->cursor->next = db->cursor->next->next;
496 
    db->cursor->next->prev = db->cursor;
1340 mateusz.vi 497 
 
1339 mateusz.vi 498 
    line_free(nextline);
1327 mateusz.vi 499 
    uidirty.from = db->cursorposy;
500 
    uidirty.to = 0xff;
1328 mateusz.vi 501 
    db->totlines -= 1;
1393 mateusz.vi 502 
    db->modflag = 1;
1292 mateusz.vi 503 
  }
504 
}
505 
 
506 
 
1327 mateusz.vi 507 
static void bkspc(struct file *db) {
1302 mateusz.vi 508 
  /* backspace is basically "left + del", not applicable only if cursor is on 1st byte of the file */
1421 mateusz.vi 509 
  if ((db->cursorposx + db->xoffset == 0) && (db->cursor->prev == NULL)) return;
1302 mateusz.vi 510 
 
1327 mateusz.vi 511 
  cursor_left(db);
512 
  del(db);
1302 mateusz.vi 513 
}
514 
 
515 
 
1346 mateusz.vi 516 
/* returns 0 on success, 1 on file not found, 2 on other error */
1359 mateusz.vi 517 
static int loadfile(struct file *db, const char *fname) {
1324 mateusz.vi 518 
  char buff[512]; /* read one entire sector at a time (faster) */
519 
  char *buffptr;
520 
  unsigned int len, llen;
1287 mateusz.vi 521 
  int fd;
1324 mateusz.vi 522 
  unsigned char eolfound;
1287 mateusz.vi 523 
 
1355 mateusz.vi 524 
  /* free the entire linked list of lines */
525 
  db_rewind(db);
526 
  while (db->cursor) {
527 
    struct line far *victim;
528 
    victim = db->cursor;
529 
    db->cursor = db->cursor->next;
530 
    line_free(victim);
531 
  }
1321 mateusz.vi 532 
 
1355 mateusz.vi 533 
  /* zero out the struct */
534 
  bzero(db, sizeof(struct file));
535 
 
1418 mateusz.vi 536 
  if (fname == NULL) goto SKIPLOADING;
1321 mateusz.vi 537 
 
1355 mateusz.vi 538 
  memcpy(db->fname, fname, strlen(fname));
539 
 
1287 mateusz.vi 540 
  if (_dos_open(fname, O_RDONLY, &fd) != 0) {
1346 mateusz.vi 541 
    return(1);
1287 mateusz.vi 542 
  }
543 
 
1313 mateusz.vi 544 
  db->lfonly = 1;
545 
 
1324 mateusz.vi 546 
  /* start by adding an empty line */
1328 mateusz.vi 547 
  if (line_add(db, NULL, 0) != 0) {
1324 mateusz.vi 548 
    /* TODO ERROR HANDLING */
549 
  }
1287 mateusz.vi 550 
 
1324 mateusz.vi 551 
  for (eolfound = 0;;) {
552 
    unsigned short consumedbytes;
553 
 
554 
    if ((_dos_read(fd, buff, sizeof(buff), &len) != 0) || (len == 0)) break;
555 
    buffptr = buff;
556 
 
557 
    FINDLINE:
558 
 
1361 mateusz.vi 559 
    /* look for nearest \n (also expand tabs) */
1324 mateusz.vi 560 
    for (consumedbytes = 0;; consumedbytes++) {
1361 mateusz.vi 561 
 
562 
      if (buffptr[consumedbytes] == '\t') {
563 
        llen = consumedbytes;
564 
        break;
565 
      }
566 
 
1324 mateusz.vi 567 
      if (consumedbytes == len) {
568 
        llen = consumedbytes;
569 
        break;
1323 mateusz.vi 570 
      }
1324 mateusz.vi 571 
      if (buffptr[consumedbytes] == '\r') {
572 
        llen = consumedbytes;
573 
        consumedbytes++;
574 
        db->lfonly = 0;
1320 mateusz.vi 575 
        break;
576 
      }
1324 mateusz.vi 577 
      if (buffptr[consumedbytes] == '\n') {
578 
        eolfound = 1;
579 
        llen = consumedbytes;
580 
        consumedbytes++;
581 
        break;
582 
      }
1287 mateusz.vi 583 
    }
1324 mateusz.vi 584 
 
585 
    /* consumedbytes is the amount of bytes processed from buffptr,
586 
     * llen is the length of line's payload (without its line terminator) */
587 
 
588 
    /* append content, if line is non-empty */
589 
    if ((llen > 0) && (line_append(db, buffptr, llen) != 0)) {
1339 mateusz.vi 590 
      goto IOERR;
1287 mateusz.vi 591 
    }
592 
 
1419 mateusz.vi 593 
    /* allocate the next line if current line ended */
1324 mateusz.vi 594 
    if (eolfound) {
1328 mateusz.vi 595 
      if (line_add(db, NULL, 0) != 0) {
1339 mateusz.vi 596 
        goto IOERR;
1324 mateusz.vi 597 
      }
598 
      eolfound = 0;
599 
    }
1287 mateusz.vi 600 
 
1361 mateusz.vi 601 
    /* append 8 spaces if tab char found */
1412 mateusz.vi 602 
    if ((consumedbytes < len) && (buffptr[consumedbytes] == '\t') && (glob_tablessmode == 0)) {
1361 mateusz.vi 603 
      consumedbytes++;
604 
      if (line_append(db, "        ", 8) != 0) {
605 
        goto IOERR;
606 
      }
607 
    }
608 
 
1324 mateusz.vi 609 
    /* anything left? process the buffer leftover again */
610 
    if (consumedbytes < len) {
611 
      len -= consumedbytes;
612 
      buffptr += consumedbytes;
613 
      goto FINDLINE;
614 
    }
615 
 
616 
  }
617 
 
1287 mateusz.vi 618 
  _dos_close(fd);
619 
 
1321 mateusz.vi 620 
  SKIPLOADING:
621 
 
1320 mateusz.vi 622 
  /* add an empty line at end if not present already, also rewind cursor to top of file */
1339 mateusz.vi 623 
  if ((db->cursor == NULL) || (db->cursor->len != 0)) line_add(db, NULL, 0);
624 
  db_rewind(db);
1320 mateusz.vi 625 
 
1346 mateusz.vi 626 
  return(0);
1339 mateusz.vi 627 
 
628 
  IOERR:
629 
  _dos_close(fd);
1346 mateusz.vi 630 
  return(2);
1287 mateusz.vi 631 
}
632 
 
633 
 
1356 mateusz.vi 634 
/* a custom argv-parsing routine that looks directly inside the PSP, avoids the need
635 
 * of argc and argv, saves some 330 bytes of binary size
636 
 * returns non-zero on error */
637 
static int parseargv(struct file *dbarr) {
638 
  char *tail = (void *)0x81; /* THIS WORKS ONLY IN SMALL MEMORY MODEL */
639 
  unsigned short count = 0;
640 
  char *arg;
641 
  unsigned short lastarg = 0;
1359 mateusz.vi 642 
  int err;
1356 mateusz.vi 643 
 
644 
  while (!lastarg) {
645 
    /* jump to nearest arg */
646 
    while (*tail == ' ') {
647 
      *tail = 0;
648 
      tail++;
649 
    }
650 
 
651 
    if (*tail == '\r') {
652 
      *tail = 0;
653 
      break;
654 
    }
655 
 
656 
    arg = tail;
657 
 
658 
    /* jump to next delimiter */
659 
    while ((*tail != ' ') && (*tail != '\r')) tail++;
660 
 
661 
    /* if \r then remember this is the last arg */
662 
    if (*tail == '\r') lastarg = 1;
663 
 
664 
    *tail = 0;
665 
    tail++;
666 
 
667 
    /* look at the arg now */
668 
    if (*arg == '/') {
1412 mateusz.vi 669 
      if (arg[1] == 't') { /* /t = do not expand tabs */
670 
        glob_tablessmode = 1;
671 
 
672 
      } else if (arg[1] == 'm') { /* /m = force mono mode */
673 
        glob_monomode = 1;
674 
 
675 
      } else {  /* help screen */
676 
        const char far *self = mdr_dos_selfexe();
677 
        unsigned short i;
678 
        if (self == NULL) self = "sved";
679 
        for (i = 0; self[i] != 0; i++) {
680 
          if (self[i] == '\\') {
681 
            self += i + 1;
682 
            i = 0;
683 
          }
1387 mateusz.vi 684 
        }
1419 mateusz.vi 685 
        mdr_coutraw_str(svarlang_str(1,3)); /* Sved, the SvarDOS editor */
1412 mateusz.vi 686 
        mdr_coutraw_str(" [");
1419 mateusz.vi 687 
        mdr_coutraw_str(svarlang_str(1,4)); /* ver */
1412 mateusz.vi 688 
        mdr_coutraw_puts(" " PVER "]");
689 
        mdr_coutraw_puts("Copyright (C) " PDATE " Mateusz Viste");
690 
        mdr_coutraw_crlf();
691 
        mdr_coutraw_str(svarlang_str(1,0)); /* usage: */
692 
        mdr_coutraw_char(' ');
693 
        while (*self != 0) {
694 
          mdr_coutraw_char(*self);
695 
          self++;
696 
        }
697 
        mdr_coutraw_char(' ');
698 
        mdr_coutraw_puts(svarlang_str(1,1)); /* args syntax */
699 
        mdr_coutraw_crlf();
700 
        mdr_coutraw_puts(svarlang_str(1,10)); /* /m */
701 
        mdr_coutraw_puts(svarlang_str(1,11)); /* /t */
702 
        return(-1);
1387 mateusz.vi 703 
      }
1412 mateusz.vi 704 
      continue;
1356 mateusz.vi 705 
    }
706 
 
707 
    /* looks to be a filename */
708 
    if (count == 10) {
1420 mateusz.vi 709 
      mdr_coutraw_puts(svarlang_str(0,12)); /* too many files */
710 
      return(-1);
1356 mateusz.vi 711 
    }
712 
 
713 
    /* try loading it */
1387 mateusz.vi 714 
    mdr_coutraw_str(svarlang_str(1,2));
715 
    mdr_coutraw_char(' ');
1356 mateusz.vi 716 
    mdr_coutraw_puts(arg);
717 
    err = loadfile(&(dbarr[count]), arg);
718 
    if (err) {
719 
      if (err == 1) { /* file not found */
1396 mateusz.vi 720 
        if ((count == 0) && (lastarg != 0)) { /* a 'file not found' is fine if only one file was given */
721 
          memcpy(dbarr[count].fname, arg, strlen(arg) + 1);
722 
          err = 0;
723 
        } else {
724 
          err = 11;
725 
        }
1356 mateusz.vi 726 
      } else { /* general error */
727 
        err = 10;
728 
      }
1396 mateusz.vi 729 
      if (err) {
730 
        mdr_coutraw_puts(svarlang_str(0,err));
731 
        return(-1);
732 
      }
1356 mateusz.vi 733 
    }
734 
    count++;
735 
  }
736 
 
737 
  return(0);
738 
}
739 
 
740 
 
1332 mateusz.vi 741 
static int savefile(const struct file *db, const char *newfname) {
1311 mateusz.vi 742 
  int fd;
743 
  const struct line far *l;
1417 mateusz.vi 744 
  unsigned int bytes;
1313 mateusz.vi 745 
  unsigned char eollen;
746 
  unsigned char eolbuf[2];
1332 mateusz.vi 747 
  int errflag = 0;
1313 mateusz.vi 748 
 
1332 mateusz.vi 749 
  /* either create a new file if newfname provided, or... */
750 
  if (newfname) {
751 
    if (_dos_creatnew(newfname, _A_NORMAL, &fd) != 0) return(-1);
752 
  } else { /* ...open db->fname */
753 
    if (_dos_open(db->fname, O_WRONLY, &fd) != 0) return(-1);
1311 mateusz.vi 754 
  }
755 
 
756 
  l = db->cursor;
757 
  while (l->prev) l = l->prev;
758 
 
1313 mateusz.vi 759 
  /* preset line terminators */
760 
  if (db->lfonly) {
761 
    eolbuf[0] = '\n';
762 
    eollen = 1;
763 
  } else {
764 
    eolbuf[0] = '\r';
765 
    eolbuf[1] = '\n';
766 
    eollen = 2;
767 
  }
768 
 
1311 mateusz.vi 769 
  while (l) {
1324 mateusz.vi 770 
    /* do not write the last empty line, it is only useful for edition */
771 
    if (l->len != 0) {
1332 mateusz.vi 772 
      errflag |= _dos_write(fd, l->payload, l->len, &bytes);
1324 mateusz.vi 773 
    } else if (l->next == NULL) {
774 
      break;
775 
    }
1332 mateusz.vi 776 
    errflag |= _dos_write(fd, eolbuf, eollen, &bytes);
1311 mateusz.vi 777 
    l = l->next;
778 
  }
779 
 
1332 mateusz.vi 780 
  errflag |= _dos_close(fd);
1330 mateusz.vi 781 
 
1332 mateusz.vi 782 
  return(errflag);
1311 mateusz.vi 783 
}
784 
 
785 
 
1327 mateusz.vi 786 
static void insert_in_line(struct file *db, const char *databuf, unsigned short len) {
1340 mateusz.vi 787 
  if (curline_resize(db, db->cursor->len + len) == 0) {
1317 mateusz.vi 788 
    unsigned short off = db->xoffset + db->cursorposx;
1393 mateusz.vi 789 
    db->modflag = 1;
1317 mateusz.vi 790 
    _fmemmove(db->cursor->payload + off + len, db->cursor->payload + off, db->cursor->len - off + 1);
791 
    db->cursor->len += len;
1327 mateusz.vi 792 
    uidirty.from = db->cursorposy;
793 
    uidirty.to = db->cursorposy;
1317 mateusz.vi 794 
    while (len--) {
795 
      db->cursor->payload[off++] = *databuf;
796 
      databuf++;
1327 mateusz.vi 797 
      cursor_right(db);
1317 mateusz.vi 798 
    }
799 
  }
800 
}
801 
 
802 
 
1343 mateusz.vi 803 
/* recompute db->curline by counting nodes in linked list */
804 
static void recompute_curline(struct file *db) {
805 
  const struct line far *l = db->cursor;
806 
 
807 
  db->curline = 0;
808 
  while (l->prev != NULL) {
809 
    db->curline += 1;
810 
    l = l->prev;
811 
  }
812 
}
813 
 
814 
 
1354 mateusz.vi 815 
enum MENU_ACTION {
1393 mateusz.vi 816 
  MENU_NONE   = 0,
817 
  MENU_OPEN   = 1,
818 
  MENU_SAVE   = 2,
819 
  MENU_SAVEAS = 3,
820 
  MENU_CLOSE  = 4,
821 
  MENU_CHGEOL = 5,
1418 mateusz.vi 822 
  MENU_QUIT   = 6
1354 mateusz.vi 823 
};
824 
 
825 
static enum MENU_ACTION ui_menu(void) {
826 
  unsigned short i, curchoice, attr, x, slen;
1393 mateusz.vi 827 
  unsigned short xorigin, yorigin;
1354 mateusz.vi 828 
 
829 
  /* find out the longest string */
830 
  slen = 0;
1355 mateusz.vi 831 
  for (i = MENU_OPEN; i <= MENU_QUIT; i++) {
1354 mateusz.vi 832 
    x = strlen(svarlang_str(8, i));
833 
    if (x > slen) slen = x;
834 
  }
835 
 
1393 mateusz.vi 836 
  /* calculate where to draw the menu on screen */
837 
  xorigin = (screenw - (slen + 5)) / 2;
1395 mateusz.vi 838 
  yorigin = (screenh - (MENU_QUIT - MENU_OPEN + 6)) / 2;
1393 mateusz.vi 839 
 
1395 mateusz.vi 840 
  /* */
841 
  uidirty.from = yorigin;
842 
  uidirty.to = 0xff;
843 
  uidirty.statusbar = 1;
844 
 
845 
  /* hide the cursor */
846 
  mdr_cout_cursor_hide();
847 
 
1355 mateusz.vi 848 
  curchoice = MENU_OPEN;
1354 mateusz.vi 849 
  for (;;) {
850 
    /* render menu */
1393 mateusz.vi 851 
    for (i = MENU_NONE; i <= MENU_QUIT + 1; i++) {
852 
      mdr_cout_char_rep(yorigin + i, xorigin, ' ', SCHEME_MENU, slen+4);
1354 mateusz.vi 853 
      if (i == curchoice) {
854 
        attr = SCHEME_MENU_CUR;
1415 mateusz.vi 855 
        mdr_cout_char_rep(yorigin + i, xorigin + 1, ' ', SCHEME_MENU_SEL, slen + 2);
1354 mateusz.vi 856 
      } else {
857 
        attr = SCHEME_MENU;
858 
      }
1416 mateusz.vi 859 
      mdr_cout_str(yorigin + i, xorigin + 2, svarlang_str(8, i), attr, slen);
1354 mateusz.vi 860 
    }
861 
    /* wait for key */
1410 mateusz.vi 862 
    switch (mdr_dos_getkey2()) {
1354 mateusz.vi 863 
      case 0x150: /* down */
864 
        if (curchoice == MENU_QUIT) {
1355 mateusz.vi 865 
          curchoice = MENU_OPEN;
1354 mateusz.vi 866 
        } else {
867 
          curchoice++;
868 
        }
869 
        break;
870 
      case 0x148: /* up */
1355 mateusz.vi 871 
        if (curchoice == MENU_OPEN) {
1354 mateusz.vi 872 
          curchoice = MENU_QUIT;
873 
        } else {
874 
          curchoice--;
875 
        }
876 
        break;
1395 mateusz.vi 877 
      default:
878 
        curchoice = MENU_NONE;
879 
        /* FALLTHRU */
880 
      case '\r': /* ENTER */
881 
        mdr_cout_cursor_show();
882 
        return(curchoice);
1354 mateusz.vi 883 
    }
884 
  }
885 
}
886 
 
887 
 
1355 mateusz.vi 888 
static struct file *select_slot(struct file *dbarr, unsigned short curfile) {
889 
  uidirty.from = 0;
890 
  uidirty.to = 0xff;
891 
  uidirty.statusbar = 1;
892 
 
893 
  dbarr = &(dbarr[curfile]);
1415 mateusz.vi 894 
  /* force redraw now, because the main() routine might not if this is exit
895 
   * time and we want to show the user which file has unsaved changes */
1355 mateusz.vi 896 
  ui_basic(dbarr, curfile);
897 
  ui_refresh(dbarr);
898 
  return(dbarr);
899 
}
900 
 
901 
 
1347 mateusz.vi 902 
/* main returns nothing, ie. sved always exits with a zero exit code
903 
 * (this saves 20 bytes of executable footprint) */
904 
void main(void) {
1355 mateusz.vi 905 
  static struct file dbarr[10];
906 
  unsigned short curfile;
907 
  struct file *db = dbarr; /* visible file is the first slot by default */
1410 mateusz.vi 908 
  struct line far *clipboard = NULL;
1414 mateusz.vi 909 
  unsigned char original_breakflag;
1275 mateusz.vi 910 
 
1418 mateusz.vi 911 
  { /* load NLS resource */
1364 mateusz.vi 912 
    unsigned short i = 0;
913 
    const char far *selfptr;
914 
    char self[128], lang[8];
915 
    selfptr = mdr_dos_selfexe();
916 
    if (selfptr != NULL) {
917 
      do {
918 
        self[i] = selfptr[i];
919 
      } while (self[i++] != 0);
920 
      svarlang_autoload_exepath(self, mdr_dos_getenv(lang, "LANG", sizeof(lang)));
921 
    }
1307 mateusz.vi 922 
  }
1282 mateusz.vi 923 
 
1355 mateusz.vi 924 
  /* preload all slots with empty files */
925 
  for (curfile = 9;; curfile--) {
1418 mateusz.vi 926 
    loadfile(&(dbarr[curfile]), NULL);
1355 mateusz.vi 927 
    if (curfile == 0) break;
928 
  }
929 
 
1356 mateusz.vi 930 
  /* parse argv (and load files, if any passed on) */
931 
  if (parseargv(dbarr) != 0) return;
1282 mateusz.vi 932 
 
1412 mateusz.vi 933 
  if ((mdr_cout_init(&screenw, &screenh) != 0) && (glob_monomode == 0)) {
1333 mateusz.vi 934 
    /* load color scheme if mdr_cout_init returns a color flag */
935 
    SCHEME_TEXT = 0x17;
1354 mateusz.vi 936 
    SCHEME_MENU = 0x70;
1388 mateusz.vi 937 
    SCHEME_MENU_CUR = 0x6f;
938 
    SCHEME_MENU_SEL = 0x66;
1333 mateusz.vi 939 
    SCHEME_STBAR1 = 0x70;
940 
    SCHEME_STBAR2 = 0x78;
1392 mateusz.vi 941 
    SCHEME_STBAR3 = 0x3f;
1333 mateusz.vi 942 
    SCHEME_SCROLL = 0x70;
1388 mateusz.vi 943 
    SCHEME_MSG = 0x6f;
1333 mateusz.vi 944 
    SCHEME_ERR = 0x4f;
945 
  }
1275 mateusz.vi 946 
 
1414 mateusz.vi 947 
  /* instruct DOS to stop detecting CTRL+C because user needs it for
948 
   * copy/paste operations. also remember the original status of the BREAK
949 
   * flag so I can restore it as it was before quitting. */
950 
  original_breakflag = mdr_dos_ctrlc_disable();
1410 mateusz.vi 951 
 
1275 mateusz.vi 952 
  for (;;) {
953 
    int k;
954 
 
1362 mateusz.vi 955 
    /* add an extra empty line if cursor is on last line and this line is not empty */
956 
    if ((db->cursor->next == NULL) && (db->cursor->len != 0)) {
957 
      if (line_add(db, NULL, 0) == 0) {
958 
        db->cursor = db->cursor->prev; /* line_add() changes the cursor pointer */
959 
      }
960 
    }
961 
 
1327 mateusz.vi 962 
    check_cursor_not_after_eol(db);
1320 mateusz.vi 963 
    mdr_cout_locate(db->cursorposy, db->cursorposx);
1275 mateusz.vi 964 
 
1392 mateusz.vi 965 
    ui_refresh(db);
966 
 
1355 mateusz.vi 967 
    if ((uidirty.statusbar != 0) || (db->modflagprev != db->modflag)) {
968 
      ui_basic(db, curfile);
1342 mateusz.vi 969 
      uidirty.statusbar = 0;
1355 mateusz.vi 970 
      db->modflagprev = db->modflag;
1342 mateusz.vi 971 
    }
1328 mateusz.vi 972 
#ifdef DBG_LINENUM
973 
      {
974 
        char ddd[10];
975 
        db->curline += 1;
976 
        ddd[0] = '0' + db->curline / 100;
977 
        ddd[1] = '0' + (db->curline % 100) / 10;
978 
        ddd[2] = '0' + (db->curline % 10);
979 
        db->curline -= 1;
980 
        ddd[3] = '/';
981 
        ddd[4] = '0' + db->totlines / 100;
982 
        ddd[5] = '0' + (db->totlines % 100) / 10;
983 
        ddd[6] = '0' + (db->totlines % 10);
984 
        ddd[7] = 0;
1333 mateusz.vi 985 
        mdr_cout_str(screenh - 1, 40, ddd, SCHEME_STBAR1, sizeof(ddd));
1328 mateusz.vi 986 
      }
987 
#endif
1275 mateusz.vi 988 
 
1410 mateusz.vi 989 
    k = mdr_dos_getkey2();
1282 mateusz.vi 990 
 
1275 mateusz.vi 991 
    if (k == 0x150) { /* down */
1327 mateusz.vi 992 
      cursor_down(db);
1275 mateusz.vi 993 
 
994 
    } else if (k == 0x148) { /* up */
1327 mateusz.vi 995 
      cursor_up(db);
1275 mateusz.vi 996 
 
997 
    } else if (k == 0x14D) { /* right */
1327 mateusz.vi 998 
      cursor_right(db);
1275 mateusz.vi 999 
 
1000 
    } else if (k == 0x14B) { /* left */
1327 mateusz.vi 1001 
      cursor_left(db);
1275 mateusz.vi 1002 
 
1282 mateusz.vi 1003 
    } else if (k == 0x149) { /* pgup */
1334 mateusz.vi 1004 
      unsigned char dist = db->cursorposy + screenh - 1;
1005 
      while ((dist != 0) && (db->cursor->prev != NULL)) {
1006 
        db->cursor = db->cursor->prev;
1007 
        dist--;
1008 
      }
1009 
      if (dist != 0) {
1010 
        db->cursorposy = 0;
1011 
        db->cursorposx = 0;
1012 
      } else {
1013 
        dist = db->cursorposy;
1014 
        while ((dist--) && (db->cursor->next)) db->cursor = db->cursor->next;
1015 
      }
1016 
      uidirty.from = 0;
1017 
      uidirty.to = 0xff;
1343 mateusz.vi 1018 
      recompute_curline(db);
1282 mateusz.vi 1019 
 
1020 
    } else if (k == 0x151) { /* pgdown */
1334 mateusz.vi 1021 
      unsigned char dist = screenh + screenh - db->cursorposy - 3;
1022 
      while ((dist != 0) && (db->cursor->next != NULL)) {
1023 
        db->cursor = db->cursor->next;
1024 
        dist--;
1025 
      }
1026 
      if (dist != 0) {
1027 
        db->cursorposy = screenh - 2;
1028 
        if (db->totlines <= db->cursorposy) db->cursorposy = db->totlines - 1;
1029 
        db->cursorposx = 0;
1030 
      } else {
1031 
        dist = screenh - 2 - db->cursorposy;
1032 
        while ((dist--) && (db->cursor->prev)) db->cursor = db->cursor->prev;
1033 
      }
1034 
      uidirty.from = 0;
1035 
      uidirty.to = 0xff;
1343 mateusz.vi 1036 
      recompute_curline(db);
1282 mateusz.vi 1037 
 
1038 
    } else if (k == 0x147) { /* home */
1327 mateusz.vi 1039 
       cursor_home(db);
1282 mateusz.vi 1040 
 
1041 
    } else if (k == 0x14F) { /* end */
1327 mateusz.vi 1042 
       cursor_eol(db);
1282 mateusz.vi 1043 
 
1275 mateusz.vi 1044 
    } else if (k == 0x1B) { /* ESC */
1354 mateusz.vi 1045 
      int quitnow = 0;
1394 mateusz.vi 1046 
      char fname[64];
1354 mateusz.vi 1047 
      int saveflag = 0;
1393 mateusz.vi 1048 
      enum MENU_ACTION ui_action;
1275 mateusz.vi 1049 
 
1392 mateusz.vi 1050 
      /* collect the exact menu action and clear the screen */
1051 
      ui_action = ui_menu();
1052 
      ui_refresh(db);
1354 mateusz.vi 1053 
 
1392 mateusz.vi 1054 
      switch (ui_action) {
1055 
 
1354 mateusz.vi 1056 
        case MENU_NONE:
1057 
          break;
1058 
 
1059 
        case MENU_OPEN:
1060 
          /* display a warning if unsaved changes are pending */
1061 
          if (db->modflag != 0) ui_msg(svarlang_str(0,4), svarlang_str(0,8), SCHEME_MSG);
1062 
 
1063 
          /* ask for filename */
1064 
          ui_getstring(svarlang_str(0,7), fname, sizeof(fname));
1065 
          if (fname[0] != 0) {
1359 mateusz.vi 1066 
            int err;
1354 mateusz.vi 1067 
            err = loadfile(db, fname);
1068 
            if (err != 0) {
1069 
              if (err == 1) {
1070 
                ui_msg(svarlang_str(0,11), NULL, SCHEME_ERR); /* file not found */
1071 
              } else {
1072 
                ui_msg(svarlang_str(0,10), NULL, SCHEME_ERR);  /* ERROR */
1073 
              }
1074 
              mdr_bios_tickswait(44); /* 3s */
1418 mateusz.vi 1075 
              loadfile(db, NULL);
1354 mateusz.vi 1076 
            }
1077 
          }
1393 mateusz.vi 1078 
          uidirty.from = 0;
1079 
          uidirty.to = 0xff;
1080 
          uidirty.statusbar = 1;
1354 mateusz.vi 1081 
          break;
1082 
 
1083 
        case MENU_SAVEAS:
1084 
          saveflag = 1;
1085 
          /* FALLTHRU */
1086 
        case MENU_SAVE:
1087 
          if ((saveflag != 0) || (db->fname[0] == 0)) { /* save as... */
1088 
            ui_getstring(svarlang_str(0,6), fname, sizeof(fname));
1089 
            if (*fname == 0) break;
1090 
            saveflag = savefile(db, fname);
1091 
            if (saveflag == 0) memcpy(db->fname, fname, sizeof(fname));
1092 
          } else {
1093 
            saveflag = savefile(db, NULL);
1094 
          }
1095 
 
1395 mateusz.vi 1096 
          mdr_cout_cursor_hide();
1097 
 
1354 mateusz.vi 1098 
          if (saveflag == 0) {
1099 
            db->modflag = 0;
1100 
            ui_msg(svarlang_str(0, 2), NULL, SCHEME_MSG);
1101 
            mdr_bios_tickswait(11); /* 11 ticks is about 600 ms */
1102 
          } else {
1103 
            ui_msg(svarlang_str(0, 3), NULL, SCHEME_ERR);
1104 
            mdr_bios_tickswait(36); /* 2s */
1105 
          }
1395 mateusz.vi 1106 
          mdr_cout_cursor_show();
1354 mateusz.vi 1107 
          break;
1108 
 
1355 mateusz.vi 1109 
        case MENU_CLOSE:
1110 
          if (ui_confirm_if_unsaved(db) == 0) {
1418 mateusz.vi 1111 
            loadfile(db, NULL);
1355 mateusz.vi 1112 
          }
1113 
          uidirty.from = 0;
1114 
          uidirty.to = 0xff;
1115 
          uidirty.statusbar = 1;
1116 
          break;
1117 
 
1354 mateusz.vi 1118 
        case MENU_CHGEOL:
1393 mateusz.vi 1119 
          db->modflag = 1;
1354 mateusz.vi 1120 
          db->lfonly ^= 1;
1121 
          break;
1122 
 
1123 
        case MENU_QUIT:
1355 mateusz.vi 1124 
          quitnow = 1;
1125 
          for (curfile = 0; curfile < 10; curfile++) {
1126 
            if (dbarr[curfile].modflag) {
1127 
              db = select_slot(dbarr, curfile);
1128 
              if (ui_confirm_if_unsaved(db) != 0) quitnow = 0;
1129 
            }
1130 
          }
1354 mateusz.vi 1131 
          break;
1132 
      }
1133 
 
1134 
      if (quitnow) break;
1135 
 
1289 mateusz.vi 1136 
    } else if (k == 0x0D) { /* ENTER */
1328 mateusz.vi 1137 
      unsigned short off = db->xoffset + db->cursorposx;
1289 mateusz.vi 1138 
      /* add a new line */
1328 mateusz.vi 1139 
      if (line_add(db, db->cursor->payload + off, db->cursor->len - off) == 0) {
1393 mateusz.vi 1140 
        db->modflag = 1;
1328 mateusz.vi 1141 
        db->cursor = db->cursor->prev; /* back to original line */
1289 mateusz.vi 1142 
        /* trim the line above */
1328 mateusz.vi 1143 
        db->cursor->len = off;
1289 mateusz.vi 1144 
        /* move cursor to the (new) line below */
1343 mateusz.vi 1145 
        db->curline -= 1;
1328 mateusz.vi 1146 
        uidirty.from = db->cursorposy;
1327 mateusz.vi 1147 
        uidirty.to = 0xff;
1328 mateusz.vi 1148 
        cursor_down(db);
1149 
        cursor_home(db);
1289 mateusz.vi 1150 
      } else {
1151 
        /* ERROR: OUT OF MEMORY */
1152 
      }
1153 
 
1292 mateusz.vi 1154 
    } else if (k == 0x153) {  /* DEL */
1327 mateusz.vi 1155 
      del(db);
1292 mateusz.vi 1156 
 
1302 mateusz.vi 1157 
    } else if (k == 0x008) { /* BKSPC */
1327 mateusz.vi 1158 
      bkspc(db);
1302 mateusz.vi 1159 
 
1308 mateusz.vi 1160 
    } else if ((k >= 0x20) && (k <= 0xff)) { /* "normal" character */
1317 mateusz.vi 1161 
      char c = k;
1327 mateusz.vi 1162 
      insert_in_line(db, &c, 1);
1308 mateusz.vi 1163 
 
1317 mateusz.vi 1164 
    } else if (k == 0x009) { /* TAB */
1412 mateusz.vi 1165 
      if (glob_tablessmode == 0) {
1166 
        insert_in_line(db, "        ", 8);
1167 
      } else {
1168 
        insert_in_line(db, "\t", 1);
1169 
      }
1317 mateusz.vi 1170 
 
1355 mateusz.vi 1171 
    } else if ((k >= 0x13b) && (k <= 0x144)) { /* F1..F10 */
1172 
      curfile = k - 0x13b;
1173 
      db = select_slot(dbarr, curfile);
1309 mateusz.vi 1174 
 
1325 mateusz.vi 1175 
    } else if (k == 0x174) { /* CTRL+ArrRight - jump to next word */
1176 
      /* if currently cursor is on a non-space, then fast-forward to nearest space or EOL */
1177 
      for (;;) {
1178 
        if (db->xoffset + db->cursorposx == db->cursor->len) break;
1179 
        if (db->cursor->payload[db->xoffset + db->cursorposx] == ' ') break;
1327 mateusz.vi 1180 
        cursor_right(db);
1325 mateusz.vi 1181 
      }
1182 
      /* now skip to next non-space or end of file */
1183 
      for (;;) {
1327 mateusz.vi 1184 
        cursor_right(db);
1325 mateusz.vi 1185 
        if (db->cursor->payload[db->xoffset + db->cursorposx] != ' ') break;
1186 
        if ((db->cursor->next == NULL) && (db->cursorposx + db->xoffset == db->cursor->len)) break;
1187 
      }
1188 
 
1189 
    } else if (k == 0x173) { /* CTRL+ArrLeft - jump to prev word */
1327 mateusz.vi 1190 
      cursor_left(db);
1325 mateusz.vi 1191 
      /* if currently cursor is on a space, then fast-forward to nearest non-space or start of line */
1192 
      for (;;) {
1193 
        if ((db->xoffset == 0) && (db->cursorposx == 0)) break;
1194 
        if (db->cursor->payload[db->xoffset + db->cursorposx] != ' ') break;
1327 mateusz.vi 1195 
        cursor_left(db);
1325 mateusz.vi 1196 
      }
1197 
      /* now skip to next space or start of file */
1198 
      for (;;) {
1327 mateusz.vi 1199 
        cursor_left(db);
1325 mateusz.vi 1200 
        if (db->cursor->payload[db->xoffset + db->cursorposx] == ' ') {
1327 mateusz.vi 1201 
          cursor_right(db);
1325 mateusz.vi 1202 
          break;
1203 
        }
1204 
        if ((db->cursorposx == 0) && (db->xoffset == 0)) break;
1205 
      }
1206 
 
1410 mateusz.vi 1207 
    } else if ((k == 0x003) || (k == 0x018)) { /* CTRL+C or CTRL+X */
1208 
      /* free clipboard if anything in it */
1209 
      if (clipboard != NULL) line_free(clipboard);
1210 
 
1211 
      /* copy cursor line to clipboard */
1212 
      clipboard = line_calloc(db->cursor->len);
1213 
      if (clipboard == NULL) {
1214 
        ui_msg(svarlang_str(0, 10), NULL, SCHEME_ERR); /* ERROR */
1215 
        mdr_bios_tickswait(18); /* 1s */
1216 
      } else {
1217 
        mdr_cout_char_rep(db->cursorposy, 0, ' ', ((SCHEME_TEXT >> 4) | (SCHEME_TEXT << 4)) & 0xff, screenw - 1);
1218 
        uidirty.from = db->cursorposy;
1219 
        uidirty.to = db->cursorposy;
1220 
        if (db->cursor->len != 0) {
1221 
          _fmemmove(clipboard->payload, db->cursor->payload, db->cursor->len);
1222 
          clipboard->len = db->cursor->len;
1223 
        }
1224 
        mdr_bios_tickswait(2); /* ca 100ms */
1225 
 
1226 
        /* if this is about cutting the line (CTRL+X) then delete cur line */
1227 
        if ((k == 0x018) && ((db->cursor->next != NULL) || (db->cursor->prev != NULL))) {
1228 
          if (db->cursor->next) db->cursor->next->prev = db->cursor->prev;
1229 
          if (db->cursor->prev) db->cursor->prev->next = db->cursor->next;
1230 
          clipboard->prev = db->cursor;
1231 
          if (db->cursor->next) {
1232 
            db->cursor = db->cursor->next;
1233 
          } else {
1234 
            cursor_up(db);
1235 
          }
1236 
          line_free(clipboard->prev);
1423 mateusz.vi 1237 
          db->totlines -= 1;
1410 mateusz.vi 1238 
          uidirty.from = 0;
1239 
          uidirty.to = 0xff;
1412 mateusz.vi 1240 
          recompute_curline(db);
1410 mateusz.vi 1241 
        }
1242 
      }
1243 
 
1420 mateusz.vi 1244 
    } else if ((k == 0x016) && (clipboard != NULL)) { /* CTRL+V */
1245 
      if (line_add(db, clipboard->payload, clipboard->len) != 0) {
1246 
        ui_msg(svarlang_str(0, 10), NULL, SCHEME_ERR); /* ERROR */
1247 
        mdr_bios_tickswait(18); /* 1s */
1248 
      } else {
1249 
        /* rewire the linked list so the new line is on top of the previous one */
1250 
        clipboard->prev = db->cursor->prev;
1251 
        /* remove prev node from list */
1252 
        db->cursor->prev = db->cursor->prev->prev;
1253 
        if (db->cursor->prev != NULL) db->cursor->prev->next = db->cursor;
1254 
        /* insert the node after cursor now */
1255 
        clipboard->prev->next = db->cursor->next;
1256 
        if (db->cursor->next != NULL) db->cursor->next->prev = clipboard->prev;
1257 
        clipboard->prev->prev = db->cursor;
1258 
        db->cursor->next = clipboard->prev;
1259 
        cursor_down(db);
1410 mateusz.vi 1260 
      }
1261 
      uidirty.from = 0;
1262 
      uidirty.to = 0xff;
1412 mateusz.vi 1263 
      recompute_curline(db);
1410 mateusz.vi 1264 
 
1333 mateusz.vi 1265 
#ifdef DBG_UNHKEYS
1282 mateusz.vi 1266 
    } else { /* UNHANDLED KEY - TODO IGNORE THIS IN PRODUCTION RELEASE */
1267 
      char buff[4];
1268 
      const char *HEX = "0123456789ABCDEF";
1269 
      buff[0] = HEX[(k >> 8) & 15];
1270 
      buff[1] = HEX[(k >> 4) & 15];
1271 
      buff[2] = HEX[k & 15];
1333 mateusz.vi 1272 
      mdr_cout_str(screenh - 1, 0, "UNHANDLED KEY: 0x", SCHEME_STBAR1, 17);
1273 
      mdr_cout_str(screenh - 1, 17, buff, SCHEME_STBAR1, 3);
1410 mateusz.vi 1274 
      mdr_dos_getkey2();
1275 mateusz.vi 1275 
      break;
1333 mateusz.vi 1276 
#endif
1275 mateusz.vi 1277 
    }
1278 
  }
1279 
 
1280 
  mdr_cout_close();
1281 
 
1414 mateusz.vi 1282 
  /* restore the DOS BREAK flag if it was originally set */
1283 
  if (original_breakflag != 0) mdr_dos_ctrlc_enable();
1284 
 
1320 mateusz.vi 1285 
  /* no need to free memory, DOS will do it for me */
1275 mateusz.vi 1286 
 
1347 mateusz.vi 1287 
  return;
1275 mateusz.vi 1288 
}