WebSVN – SvarDOS – Diff – /sved/trunk/sved.c


/* Sved, the SvarDOS editor
 *
 * Copyright (C) 2023 Mateusz Viste
 *
 * Sved is released under the terms of the MIT license.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */
 
#include <dos.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <malloc.h>   /* _fcalloc() */
 
#include "mdr\cout.h"
#include "mdr\keyb.h"
 
#include "svarlang\svarlang.h"
 
#define COL_TXT        0
#define COL_STATUSBAR1 1
#define COL_STATUSBAR2 2
#define COL_SCROLLBAR  3
/* preload the mono scheme (to be overloaded at runtime if color adapter present) */
static unsigned char scheme[] = {0x07, 0x70, 0x70, 0x70};
 
#define SCROLL_CURSOR 0xB1
 
 
struct line {
  struct line far *prev;
  struct line far *next;
  unsigned short len;
  char payload[1];
};
 
struct linedb {
  struct line far *topscreen;
  struct line far *cursor;
  unsigned short xoffset;
};
 
 
/* returns non-zero on error */
static int line_add(struct linedb *db, const char far *line) {
  unsigned short slen;
  struct line far *l;
 
  /* slen = strlen(line) (but for far pointer) */
  for (slen = 0; line[slen] != 0; slen++);
 
  /* trim out CR/LF line endings */
  if ((slen >= 2) && (line[slen - 2] == '\r')) {
    slen -= 2;
  } else if ((slen >= 1) && (line[slen - 1] == '\n')) {
    slen--;
  }
 
  l = _fcalloc(1, sizeof(struct line) + slen + 1);
  if (l == NULL) return(-1);
 
  l->prev = db->cursor;
  if (db->cursor) {
    l->next = db->cursor->next;
    db->cursor->next = l;
    l->next->prev = l;
  }
  db->cursor = l;
  _fmemcpy(l->payload, line, slen);
  l->len = slen;
 
  return(0);
}
 
 
static void db_rewind(struct linedb *db) {
  if (db->cursor == NULL) return;
  while (db->cursor->prev) db->cursor = db->cursor->prev;
  db->topscreen = db->cursor;
}
 
 
static void load_colorscheme(void) {
  scheme[COL_TXT] = 0x17;
  scheme[COL_STATUSBAR1] = 0x70;
  scheme[COL_STATUSBAR2] = 0x78;
  scheme[COL_SCROLLBAR] = 0x70;
}
 
 
static void ui_basic(unsigned char screenw, unsigned char screenh, const char *fname) {
  unsigned char i;
  const char *s = svarlang_strid(0); /* HELP */
  unsigned char helpcol = screenw - (strlen(s) + 4);
 
  /* clear screen */
  mdr_cout_cls(scheme[COL_TXT]);
 
  /* status bar */
  for (i = 0; i < helpcol; i++) {
    mdr_cout_char(screenh - 1, i, *fname, scheme[COL_STATUSBAR1]);
    if (*fname != 0) fname++;
  }
  mdr_cout_str(screenh - 1, helpcol, " F1=", scheme[COL_STATUSBAR2], 40);
  mdr_cout_str(screenh - 1, helpcol + 4, s, scheme[COL_STATUSBAR2], 40);
 
  /* scroll bar */
  for (i = 0; i < (screenh - 1); i++) {
    mdr_cout_char(i, screenw - 1, SCROLL_CURSOR, scheme[COL_SCROLLBAR]);
  }
}
 
 
static void ui_refresh(const struct linedb *db, unsigned char screenw, unsigned char screenh, unsigned char uidirtyfrom, unsigned char uidirtyto) {
  unsigned char y = 0;
  unsigned char len;
  struct line far *l;
 
#ifdef DBG_REFRESH
  static char m = 'a';
  m++;
  if (m > 'z') m = 'a';
#endif
 
  for (l = db->topscreen; l != NULL; l = l->next, y++) {
 
    /* skip lines that do not to be refreshed */
    if (y < uidirtyfrom) continue;
    if (y > uidirtyto) break;
 
    if (db->xoffset < l->len) {
      for (len = 0; l->payload[len] != 0; len++) mdr_cout_char(y, len, l->payload[len], scheme[COL_TXT]);
    } else {
      len = 0;
    }
    while (len < screenw - 1) mdr_cout_char(y, len++, ' ', scheme[COL_TXT]);
 
#ifdef DBG_REFRESH
    mdr_cout_char(y, 0, m, scheme[COL_STATUSBAR1]);
#endif
 
    if (y == screenh - 2) break;
  }
}
 
 
static void check_cursor_not_after_eol(struct linedb *db, unsigned char *cursorpos, unsigned char *uidirtyfrom, unsigned char *uidirtyto) {
  if (db->xoffset + *cursorpos <= db->cursor->len) return;
 
  if (db->cursor->len < db->xoffset) {
    *cursorpos = 0;
    db->xoffset = db->cursor->len;
    *uidirtyfrom = 0;
    *uidirtyto = 0xff;
  } else {
    *cursorpos = db->cursor->len - db->xoffset;
  }
}
 
 
static void cursor_up(struct linedb *db, unsigned char *cursorposy, unsigned char *uidirtyfrom, unsigned char *uidirtyto) {
  if (db->cursor->prev != NULL) {
    db->cursor = db->cursor->prev;
    if (*cursorposy == 0) {
      db->topscreen = db->cursor;
      *uidirtyfrom = 0;
      *uidirtyto = 0xff;
    } else {
      *cursorposy -= 1;
    }
  }
}
 
 
static void cursor_eol(struct linedb *db, unsigned char *cursorposx, unsigned char screenw, unsigned char *uidirtyfrom, unsigned char *uidirtyto) {
  /* adjust xoffset to make sure eol is visible on screen */
  if (db->xoffset > db->cursor->len) {
    db->xoffset = db->cursor->len - 1;
    *uidirtyfrom = 0;
    *uidirtyto = 0xff;
  }
 
  if (db->xoffset + screenw - 1 <= db->cursor->len) {
    db->xoffset = db->cursor->len - screenw + 2;
    *uidirtyfrom = 0;
    *uidirtyto = 0xff;
  }
  *cursorposx = db->cursor->len - db->xoffset;
}
 
 
static void cursor_down(struct linedb *db, unsigned char *cursorposy, unsigned char screenh, unsigned char *uidirtyfrom, unsigned char *uidirtyto) {
  if (db->cursor->next != NULL) {
    db->cursor = db->cursor->next;
    if (*cursorposy < screenh - 2) {
      *cursorposy += 1;
    } else {
      db->topscreen = db->topscreen->next;
      *uidirtyfrom = 0;
      *uidirtyto = 0xff;
    }
  }
}
 
 
static void cursor_left(struct linedb *db, unsigned char *cursorposx, unsigned char *cursorposy, unsigned char screenw, unsigned char *uidirtyfrom, unsigned char *uidirtyto) {
  if (*cursorposx > 0) {
    *cursorposx -= 1;
  } else if (db->xoffset > 0) {
    db->xoffset -= 1;
    *uidirtyfrom = 0;
    *uidirtyto = 0xff;
  } else if (db->cursor->prev != NULL) { /* jump to end of line above */
    cursor_up(db, cursorposy, uidirtyfrom, uidirtyto);
    cursor_eol(db, cursorposx, screenw, uidirtyfrom, uidirtyto);
  }
}
 
 
static void cursor_home(struct linedb *db, unsigned char *cursorposx, unsigned char *uidirtyfrom, unsigned char *uidirtyto) {
  *cursorposx = 0;
  if (db->xoffset != 0) {
    db->xoffset = 0;
    *uidirtyfrom = 0;
    *uidirtyto = 0xff;
  }
}
 
 
static void del(struct linedb *db, unsigned char cursorposx, unsigned char cursorposy, unsigned char *uidirtyfrom, unsigned char *uidirtyto) {
  if (cursorposx + db->xoffset < db->cursor->len) {
    _fmemmove(db->cursor->payload + cursorposx + db->xoffset, db->cursor->payload + cursorposx + db->xoffset + 1, db->cursor->len - cursorposx - db->xoffset);
    db->cursor->len -= 1; /* do this AFTER memmove so the copy includes the nul terminator */
    *uidirtyfrom = cursorposy;
    *uidirtyto = cursorposy;
  } else if (db->cursor->next != NULL) { /* cursor is at end of line: merge current line with next one (if there is a next one) */
    struct line far *nextline = db->cursor->next;
    if (db->cursor->next->len > 0) {
      void far *newptr = _frealloc(db->cursor, sizeof(struct line) + db->cursor->len + db->cursor->next->len + 1);
      if (newptr != NULL) {
        db->cursor = newptr;
        _fmemcpy(db->cursor->payload + db->cursor->len, db->cursor->next->payload, db->cursor->next->len + 1);
        db->cursor->len += db->cursor->next->len;
        /* update db->topscreen if needed */
        if (cursorposy == 0) db->topscreen = db->cursor;
      }
    }
    db->cursor->next = db->cursor->next->next;
    db->cursor->next->prev = db->cursor;
    if (db->cursor->prev != NULL) db->cursor->prev->next = db->cursor; /* in case realloc changed my pointer */
    _ffree(nextline);
    *uidirtyfrom = cursorposy;
    *uidirtyto = 0xff;
  }
}
 
 
static void bkspc(struct linedb *db, unsigned char *cursorposx, unsigned char *cursorposy, unsigned char screenw, unsigned char *uidirtyfrom, unsigned char *uidirtyto) {
 
  /* backspace is basically "left + del", not applicable only if cursor is on 1st byte of the file */
  if ((*cursorposx == 0) && (db->xoffset == 0) && (db->cursor->prev == NULL)) return;
 
  cursor_left(db, cursorposx, cursorposy, screenw, uidirtyfrom, uidirtyto);
  del(db, *cursorposx, *cursorposy, uidirtyfrom, uidirtyto);
}
 
 
/* a custom argv-parsing routine that looks directly inside the PSP, avoids the need
 * of argc and argv, saves some 330 bytes of binary size */
static char *parseargv(void) {
  char *tail = (void *)0x81; /* THIS WORKS ONLY IN SMALL MEMORY MODEL */
  unsigned char count = 0;
  char *argv[4];
 
  while (count < 4) {
    /* jump to nearest arg */
    while (*tail == ' ') {
      *tail = 0;
      tail++;
    }
 
    if (*tail == '\r') {
      *tail = 0;
      break;
    }
 
    argv[count++] = tail;
 
    /* jump to next delimiter */
    while ((*tail != ' ') && (*tail != '\r')) tail++;
  }
 
  /* check args now */
  if (count != 1) return(NULL);
 
  return(argv[0]);
}
 
 
static int loadfile(struct linedb *db, const char *fname) {
  char buff[1024];
  unsigned int prevlen = 0, len, llen;
  int fd;
  int r = 0;
 
  if (_dos_open(fname, O_RDONLY, &fd) != 0) {
    mdr_coutraw_puts("Failed to open file:");
    mdr_coutraw_puts(fname);
    return(-1);
  }
 
  do {
    if (_dos_read(fd, buff + prevlen, sizeof(buff) - prevlen, &len) == 0) {
      len += prevlen;
    } else {
      len = prevlen;
    }
 
    /* look for nearest \n and replace with 0*/
    for (llen = 0; buff[llen] != '\n'; llen++) {
      if (llen == sizeof(buff)) break;
    }
    buff[llen] = 0;
    if ((llen > 0) && (buff[llen - 1])) buff[llen - 1] = 0; /* trim \r if line ending is cr/lf */
    if (line_add(db, buff) != 0) {
      mdr_coutraw_puts("out of memory");
      r = -1;
      break;
    }
 
    len -= llen + 1;
    memmove(buff, buff + llen + 1, len);
    prevlen = len;
  } while (len > 0);
 
  _dos_close(fd);
 
  return(r);
}
 
 
int main(void) {
  const char *fname;
  struct linedb db;
  unsigned char screenw = 0, screenh = 0;
  unsigned char cursorposx = 0, cursorposy = 0;
  unsigned char uidirtyfrom = 0, uidirtyto = 0xff; /* make sure to redraw entire UI at first run */
 
  bzero(&db, sizeof(db));
 
  svarlang_autoload_nlspath("sved");
 
  fname = parseargv();
 
  if (fname == NULL) {
    mdr_coutraw_puts(svarlang_str(1,0)); /* usage: sved file.txt */
    return(0);
  }
 
  /* load file */
  if (loadfile(&db, fname) != 0) return(1);
 
  /* add an empty line at end if not present already */
  if (db.cursor->len != 0) line_add(&db, "");
 
  if (mdr_cout_init(&screenw, &screenh)) load_colorscheme();
  ui_basic(screenw, screenh, fname);
 
  db_rewind(&db);
 
  for (;;) {
    int k;
 
    check_cursor_not_after_eol(&db, &cursorposx, &uidirtyfrom, &uidirtyto);
    mdr_cout_locate(cursorposy, cursorposx);
 
    if (uidirtyfrom != 0xff) {
      ui_refresh(&db, screenw, screenh, uidirtyfrom, uidirtyto);
      uidirtyfrom = 0xff;
    }
 
    k = keyb_getkey();
 
    if (k == 0x150) { /* down */
      cursor_down(&db, &cursorposy, screenh, &uidirtyfrom, &uidirtyto);
 
    } else if (k == 0x148) { /* up */
      cursor_up(&db, &cursorposy, &uidirtyfrom, &uidirtyto);
 
    } else if (k == 0x14D) { /* right */
      if (db.cursor->len > db.xoffset + cursorposx) {
        if (cursorposx < screenw - 2) {
          cursorposx++;
        } else {
          db.xoffset++;
          uidirtyfrom = 0;
          uidirtyto = 0xff;
        }
      } else {
        cursor_down(&db, &cursorposy, screenh, &uidirtyfrom, &uidirtyto);
        cursor_home(&db, &cursorposx, &uidirtyfrom, &uidirtyto);
      }
 
    } else if (k == 0x14B) { /* left */
 
 
 
 
 
 
 
 
      cursor_left(&db, &cursorposx, &cursorposy, screenw, &uidirtyfrom, &uidirtyto);
 
 
    } else if (k == 0x149) { /* pgup */
      // TODO
 
    } else if (k == 0x151) { /* pgdown */
      // TODO
 
    } else if (k == 0x147) { /* home */
       cursor_home(&db, &cursorposx, &uidirtyfrom, &uidirtyto);
 
    } else if (k == 0x14F) { /* end */
       cursor_eol(&db, &cursorposx, screenw, &uidirtyfrom, &uidirtyto);
 
    } else if (k == 0x1B) { /* ESC */
      break;
 
    } else if (k == 0x0D) { /* ENTER */
      /* add a new line */
      if (line_add(&db, db.cursor->payload + db.xoffset + cursorposx) == 0) {
        /* trim the line above */
        db.cursor->prev->len = db.xoffset + cursorposx;
        db.cursor->prev->payload[db.cursor->prev->len] = 0;
        /* move cursor to the (new) line below */
        cursorposx = 0;
        if (cursorposy < screenh - 2) {
          uidirtyfrom = cursorposy;
          cursorposy++;
        } else {
          db.topscreen = db.topscreen->next;
          uidirtyfrom = 0;
        }
        uidirtyto = 0xff;
      } else {
        /* ERROR: OUT OF MEMORY */
      }
 
    } else if (k == 0x153) {  /* DEL */
      del(&db, cursorposx, cursorposy, &uidirtyfrom, &uidirtyto);
 
    } else if (k == 0x008) { /* BKSPC */
      bkspc(&db, &cursorposx, &cursorposy, screenw, &uidirtyfrom, &uidirtyto);
 
    } else { /* UNHANDLED KEY - TODO IGNORE THIS IN PRODUCTION RELEASE */
      char buff[4];
      const char *HEX = "0123456789ABCDEF";
      buff[0] = HEX[(k >> 8) & 15];
      buff[1] = HEX[(k >> 4) & 15];
      buff[2] = HEX[k & 15];
      mdr_cout_str(screenh - 1, 0, "UNHANDLED KEY: 0x", scheme[COL_STATUSBAR1], 17);
      mdr_cout_str(screenh - 1, 17, buff, scheme[COL_STATUSBAR1], 3);
      keyb_getkey();
      break;
    }
  }
 
  mdr_cout_close();
 
  /* TODO free memory */
 
  return(0);
}
 

Rev 1292	Rev 1302
1	`/* Sved, the SvarDOS editor`	1	`/* Sved, the SvarDOS editor`
2	`*`	2	`*`
3	`* Copyright (C) 2023 Mateusz Viste`	3	`* Copyright (C) 2023 Mateusz Viste`
4	`*`	4	`*`
5	`* Sved is released under the terms of the MIT license.`	5	`* Sved is released under the terms of the MIT license.`
6	`*`	6	`*`
7	`* Permission is hereby granted, free of charge, to any person obtaining a copy`	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`	8	`* of this software and associated documentation files (the "Software"), to`
9	`* deal in the Software without restriction, including without limitation the`	9	`* deal in the Software without restriction, including without limitation the`
10	`* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or`	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`	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:`	12	`* furnished to do so, subject to the following conditions:`
13	`*`	13	`*`
14	`* The above copyright notice and this permission notice shall be included in`	14	`* The above copyright notice and this permission notice shall be included in`
15	`* all copies or substantial portions of the Software.`	15	`* all copies or substantial portions of the Software.`
16	`*`	16	`*`
17	`* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR`	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,`	18	`* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,`
19	`* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE`	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`	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`	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`	22	`* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS`
23	`* IN THE SOFTWARE.`	23	`* IN THE SOFTWARE.`
24	`*/`	24	`*/`
25		25
26	`#include <dos.h>`	26	`#include <dos.h>`
27	`#include <fcntl.h>`	27	`#include <fcntl.h>`
28	`#include <stdlib.h>`	28	`#include <stdlib.h>`
29	`#include <string.h>`	29	`#include <string.h>`
30	`#include <malloc.h> /* _fcalloc() */`	30	`#include <malloc.h> /* _fcalloc() */`
31		31
32	`#include "mdr\cout.h"`	32	`#include "mdr\cout.h"`
33	`#include "mdr\keyb.h"`	33	`#include "mdr\keyb.h"`
34		34
35	`#include "svarlang\svarlang.h"`	35	`#include "svarlang\svarlang.h"`
36		36
37	`#define COL_TXT 0`	37	`#define COL_TXT 0`
38	`#define COL_STATUSBAR1 1`	38	`#define COL_STATUSBAR1 1`
39	`#define COL_STATUSBAR2 2`	39	`#define COL_STATUSBAR2 2`
40	`#define COL_SCROLLBAR 3`	40	`#define COL_SCROLLBAR 3`
41	`/* preload the mono scheme (to be overloaded at runtime if color adapter present) */`	41	`/* preload the mono scheme (to be overloaded at runtime if color adapter present) */`
42	`static unsigned char scheme[] = {0x07, 0x70, 0x70, 0x70};`	42	`static unsigned char scheme[] = {0x07, 0x70, 0x70, 0x70};`
43		43
44	`#define SCROLL_CURSOR 0xB1`	44	`#define SCROLL_CURSOR 0xB1`
45		45
46		46
47	`struct line {`	47	`struct line {`
48	`struct line far *prev;`	48	`struct line far *prev;`
49	`struct line far *next;`	49	`struct line far *next;`
50	`unsigned short len;`	50	`unsigned short len;`
51	`char payload[1];`	51	`char payload[1];`
52	`};`	52	`};`
53		53
54	`struct linedb {`	54	`struct linedb {`
55	`struct line far *topscreen;`	55	`struct line far *topscreen;`
56	`struct line far *cursor;`	56	`struct line far *cursor;`
57	`unsigned short xoffset;`	57	`unsigned short xoffset;`
58	`};`	58	`};`
59		59
60		60
61	`/* returns non-zero on error */`	61	`/* returns non-zero on error */`
62	`static int line_add(struct linedb db, const char far line) {`	62	`static int line_add(struct linedb db, const char far line) {`
63	`unsigned short slen;`	63	`unsigned short slen;`
64	`struct line far *l;`	64	`struct line far *l;`
65		65
66	`/* slen = strlen(line) (but for far pointer) */`	66	`/* slen = strlen(line) (but for far pointer) */`
67	`for (slen = 0; line[slen] != 0; slen++);`	67	`for (slen = 0; line[slen] != 0; slen++);`
68		68
69	`/* trim out CR/LF line endings */`	69	`/* trim out CR/LF line endings */`
70	`if ((slen >= 2) && (line[slen - 2] == '\r')) {`	70	`if ((slen >= 2) && (line[slen - 2] == '\r')) {`
71	`slen -= 2;`	71	`slen -= 2;`
72	`} else if ((slen >= 1) && (line[slen - 1] == '\n')) {`	72	`} else if ((slen >= 1) && (line[slen - 1] == '\n')) {`
73	`slen--;`	73	`slen--;`
74	`}`	74	`}`
75		75
76	`l = _fcalloc(1, sizeof(struct line) + slen + 1);`	76	`l = _fcalloc(1, sizeof(struct line) + slen + 1);`
77	`if (l == NULL) return(-1);`	77	`if (l == NULL) return(-1);`
78		78
79	`l->prev = db->cursor;`	79	`l->prev = db->cursor;`
80	`if (db->cursor) {`	80	`if (db->cursor) {`
81	`l->next = db->cursor->next;`	81	`l->next = db->cursor->next;`
82	`db->cursor->next = l;`	82	`db->cursor->next = l;`
83	`l->next->prev = l;`	83	`l->next->prev = l;`
84	`}`	84	`}`
85	`db->cursor = l;`	85	`db->cursor = l;`
86	`_fmemcpy(l->payload, line, slen);`	86	`_fmemcpy(l->payload, line, slen);`
87	`l->len = slen;`	87	`l->len = slen;`
88		88
89	`return(0);`	89	`return(0);`
90	`}`	90	`}`
91		91
92		92
93	`static void db_rewind(struct linedb *db) {`	93	`static void db_rewind(struct linedb *db) {`
94	`if (db->cursor == NULL) return;`	94	`if (db->cursor == NULL) return;`
95	`while (db->cursor->prev) db->cursor = db->cursor->prev;`	95	`while (db->cursor->prev) db->cursor = db->cursor->prev;`
96	`db->topscreen = db->cursor;`	96	`db->topscreen = db->cursor;`
97	`}`	97	`}`
98		98
99		99
100	`static void load_colorscheme(void) {`	100	`static void load_colorscheme(void) {`
101	`scheme[COL_TXT] = 0x17;`	101	`scheme[COL_TXT] = 0x17;`
102	`scheme[COL_STATUSBAR1] = 0x70;`	102	`scheme[COL_STATUSBAR1] = 0x70;`
103	`scheme[COL_STATUSBAR2] = 0x78;`	103	`scheme[COL_STATUSBAR2] = 0x78;`
104	`scheme[COL_SCROLLBAR] = 0x70;`	104	`scheme[COL_SCROLLBAR] = 0x70;`
105	`}`	105	`}`
106		106
107		107
108	`static void ui_basic(unsigned char screenw, unsigned char screenh, const char *fname) {`	108	`static void ui_basic(unsigned char screenw, unsigned char screenh, const char *fname) {`
109	`unsigned char i;`	109	`unsigned char i;`
110	`const char *s = "HELP";`	110	`const char s = svarlang_strid(0); / HELP */`
111	`unsigned char helpcol = screenw - (strlen(s) + 4);`	111	`unsigned char helpcol = screenw - (strlen(s) + 4);`
112		112
113	`/* clear screen */`	113	`/* clear screen */`
114	`mdr_cout_cls(scheme[COL_TXT]);`	114	`mdr_cout_cls(scheme[COL_TXT]);`
115		115
116	`/* status bar */`	116	`/* status bar */`
117	`for (i = 0; i < helpcol; i++) {`	117	`for (i = 0; i < helpcol; i++) {`
118	`mdr_cout_char(screenh - 1, i, *fname, scheme[COL_STATUSBAR1]);`	118	`mdr_cout_char(screenh - 1, i, *fname, scheme[COL_STATUSBAR1]);`
119	`if (*fname != 0) fname++;`	119	`if (*fname != 0) fname++;`
120	`}`	120	`}`
121	`mdr_cout_str(screenh - 1, helpcol, " F1=", scheme[COL_STATUSBAR2], 40);`	121	`mdr_cout_str(screenh - 1, helpcol, " F1=", scheme[COL_STATUSBAR2], 40);`
122	`mdr_cout_str(screenh - 1, helpcol + 4, s, scheme[COL_STATUSBAR2], 40);`	122	`mdr_cout_str(screenh - 1, helpcol + 4, s, scheme[COL_STATUSBAR2], 40);`
123		123
124	`/* scroll bar */`	124	`/* scroll bar */`
125	`for (i = 0; i < (screenh - 1); i++) {`	125	`for (i = 0; i < (screenh - 1); i++) {`
126	`mdr_cout_char(i, screenw - 1, SCROLL_CURSOR, scheme[COL_SCROLLBAR]);`	126	`mdr_cout_char(i, screenw - 1, SCROLL_CURSOR, scheme[COL_SCROLLBAR]);`
127	`}`	127	`}`
128	`}`	128	`}`
129		129
130		130
131	`static void ui_refresh(const struct linedb *db, unsigned char screenw, unsigned char screenh, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	131	`static void ui_refresh(const struct linedb *db, unsigned char screenw, unsigned char screenh, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
132	`unsigned char y = 0;`	132	`unsigned char y = 0;`
133	`unsigned char len;`	133	`unsigned char len;`
134	`struct line far *l;`	134	`struct line far *l;`
135		135
136	`#ifdef DBG_REFRESH`	136	`#ifdef DBG_REFRESH`
137	`static char m = 'a';`	137	`static char m = 'a';`
138	`m++;`	138	`m++;`
139	`if (m > 'z') m = 'a';`	139	`if (m > 'z') m = 'a';`
140	`#endif`	140	`#endif`
141		141
142	`for (l = db->topscreen; l != NULL; l = l->next, y++) {`	142	`for (l = db->topscreen; l != NULL; l = l->next, y++) {`
143		143
144	`/* skip lines that do not to be refreshed */`	144	`/* skip lines that do not to be refreshed */`
145	`if (y < uidirtyfrom) continue;`	145	`if (y < uidirtyfrom) continue;`
146	`if (y > uidirtyto) break;`	146	`if (y > uidirtyto) break;`
147		147
148	`if (db->xoffset < l->len) {`	148	`if (db->xoffset < l->len) {`
149	`for (len = 0; l->payload[len] != 0; len++) mdr_cout_char(y, len, l->payload[len], scheme[COL_TXT]);`	149	`for (len = 0; l->payload[len] != 0; len++) mdr_cout_char(y, len, l->payload[len], scheme[COL_TXT]);`
150	`} else {`	150	`} else {`
151	`len = 0;`	151	`len = 0;`
152	`}`	152	`}`
153	`while (len < screenw - 1) mdr_cout_char(y, len++, ' ', scheme[COL_TXT]);`	153	`while (len < screenw - 1) mdr_cout_char(y, len++, ' ', scheme[COL_TXT]);`
154		154
155	`#ifdef DBG_REFRESH`	155	`#ifdef DBG_REFRESH`
156	`mdr_cout_char(y, 0, m, scheme[COL_STATUSBAR1]);`	156	`mdr_cout_char(y, 0, m, scheme[COL_STATUSBAR1]);`
157	`#endif`	157	`#endif`
158		158
159	`if (y == screenh - 2) break;`	159	`if (y == screenh - 2) break;`
160	`}`	160	`}`
161	`}`	161	`}`
162		162
163		163
164	`static void check_cursor_not_after_eol(struct linedb db, unsigned char cursorpos, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	164	`static void check_cursor_not_after_eol(struct linedb db, unsigned char cursorpos, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
165	`if (db->xoffset + *cursorpos <= db->cursor->len) return;`	165	`if (db->xoffset + *cursorpos <= db->cursor->len) return;`
166		166
167	`if (db->cursor->len < db->xoffset) {`	167	`if (db->cursor->len < db->xoffset) {`
168	`*cursorpos = 0;`	168	`*cursorpos = 0;`
169	`db->xoffset = db->cursor->len;`	169	`db->xoffset = db->cursor->len;`
170	`*uidirtyfrom = 0;`	170	`*uidirtyfrom = 0;`
171	`*uidirtyto = 0xff;`	171	`*uidirtyto = 0xff;`
172	`} else {`	172	`} else {`
173	`*cursorpos = db->cursor->len - db->xoffset;`	173	`*cursorpos = db->cursor->len - db->xoffset;`
174	`}`	174	`}`
175	`}`	175	`}`
176		176
177		177
178	`static void cursor_up(struct linedb db, unsigned char cursorposy, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	178	`static void cursor_up(struct linedb db, unsigned char cursorposy, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
179	`if (db->cursor->prev != NULL) {`	179	`if (db->cursor->prev != NULL) {`
180	`db->cursor = db->cursor->prev;`	180	`db->cursor = db->cursor->prev;`
181	`if (*cursorposy == 0) {`	181	`if (*cursorposy == 0) {`
182	`db->topscreen = db->cursor;`	182	`db->topscreen = db->cursor;`
183	`*uidirtyfrom = 0;`	183	`*uidirtyfrom = 0;`
184	`*uidirtyto = 0xff;`	184	`*uidirtyto = 0xff;`
185	`} else {`	185	`} else {`
186	`*cursorposy -= 1;`	186	`*cursorposy -= 1;`
187	`}`	187	`}`
188	`}`	188	`}`
189	`}`	189	`}`
190		190
191		191
192	`static void cursor_eol(struct linedb db, unsigned char cursorposx, unsigned char screenw, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	192	`static void cursor_eol(struct linedb db, unsigned char cursorposx, unsigned char screenw, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
193	`/* adjust xoffset to make sure eol is visible on screen */`	193	`/* adjust xoffset to make sure eol is visible on screen */`
194	`if (db->xoffset > db->cursor->len) {`	194	`if (db->xoffset > db->cursor->len) {`
195	`db->xoffset = db->cursor->len - 1;`	195	`db->xoffset = db->cursor->len - 1;`
196	`*uidirtyfrom = 0;`	196	`*uidirtyfrom = 0;`
197	`*uidirtyto = 0xff;`	197	`*uidirtyto = 0xff;`
198	`}`	198	`}`
199		199
200	`if (db->xoffset + screenw - 1 <= db->cursor->len) {`	200	`if (db->xoffset + screenw - 1 <= db->cursor->len) {`
201	`db->xoffset = db->cursor->len - screenw + 2;`	201	`db->xoffset = db->cursor->len - screenw + 2;`
202	`*uidirtyfrom = 0;`	202	`*uidirtyfrom = 0;`
203	`*uidirtyto = 0xff;`	203	`*uidirtyto = 0xff;`
204	`}`	204	`}`
205	`*cursorposx = db->cursor->len - db->xoffset;`	205	`*cursorposx = db->cursor->len - db->xoffset;`
206	`}`	206	`}`
207		207
208		208
209	`static void cursor_down(struct linedb db, unsigned char cursorposy, unsigned char screenh, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	209	`static void cursor_down(struct linedb db, unsigned char cursorposy, unsigned char screenh, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
210	`if (db->cursor->next != NULL) {`	210	`if (db->cursor->next != NULL) {`
211	`db->cursor = db->cursor->next;`	211	`db->cursor = db->cursor->next;`
212	`if (*cursorposy < screenh - 2) {`	212	`if (*cursorposy < screenh - 2) {`
213	`*cursorposy += 1;`	213	`*cursorposy += 1;`
214	`} else {`	214	`} else {`
215	`db->topscreen = db->topscreen->next;`	215	`db->topscreen = db->topscreen->next;`
216	`*uidirtyfrom = 0;`	216	`*uidirtyfrom = 0;`
217	`*uidirtyto = 0xff;`	217	`*uidirtyto = 0xff;`
218	`}`	218	`}`
219	`}`	219	`}`
220	`}`	220	`}`
221		221
222		222
-		223	`static void cursor_left(struct linedb db, unsigned char cursorposx, unsigned char cursorposy, unsigned char screenw, unsigned char uidirtyfrom, unsigned char *uidirtyto) {`
-		224	`if (*cursorposx > 0) {`
-		225	`*cursorposx -= 1;`
-		226	`} else if (db->xoffset > 0) {`
-		227	`db->xoffset -= 1;`
-		228	`*uidirtyfrom = 0;`
-		229	`*uidirtyto = 0xff;`
-		230	`} else if (db->cursor->prev != NULL) { /* jump to end of line above */`
-		231	`cursor_up(db, cursorposy, uidirtyfrom, uidirtyto);`
-		232	`cursor_eol(db, cursorposx, screenw, uidirtyfrom, uidirtyto);`
-		233	`}`
-		234	`}`
-		235
-		236
223	`static void cursor_home(struct linedb db, unsigned char cursorposx, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	237	`static void cursor_home(struct linedb db, unsigned char cursorposx, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
224	`*cursorposx = 0;`	238	`*cursorposx = 0;`
225	`if (db->xoffset != 0) {`	239	`if (db->xoffset != 0) {`
226	`db->xoffset = 0;`	240	`db->xoffset = 0;`
227	`*uidirtyfrom = 0;`	241	`*uidirtyfrom = 0;`
228	`*uidirtyto = 0xff;`	242	`*uidirtyto = 0xff;`
229	`}`	243	`}`
230	`}`	244	`}`
231		245
232		246
233	`static void del(struct linedb db, unsigned char cursorposx, unsigned char cursorposy, unsigned char uidirtyfrom, unsigned char *uidirtyto) {`	247	`static void del(struct linedb db, unsigned char cursorposx, unsigned char cursorposy, unsigned char uidirtyfrom, unsigned char *uidirtyto) {`
234	`if (cursorposx + db->xoffset < db->cursor->len) {`	248	`if (cursorposx + db->xoffset < db->cursor->len) {`
235	`_fmemmove(db->cursor->payload + cursorposx + db->xoffset, db->cursor->payload + cursorposx + db->xoffset + 1, db->cursor->len - cursorposx - db->xoffset);`	249	`_fmemmove(db->cursor->payload + cursorposx + db->xoffset, db->cursor->payload + cursorposx + db->xoffset + 1, db->cursor->len - cursorposx - db->xoffset);`
236	`db->cursor->len -= 1; /* do this AFTER memmove so the copy includes the nul terminator */`	250	`db->cursor->len -= 1; /* do this AFTER memmove so the copy includes the nul terminator */`
237	`*uidirtyfrom = cursorposy;`	251	`*uidirtyfrom = cursorposy;`
238	`*uidirtyto = cursorposy;`	252	`*uidirtyto = cursorposy;`
239	`} else if (db->cursor->next != NULL) { /* cursor is at end of line: merge current line with next one (if there is a next one) */`	253	`} else if (db->cursor->next != NULL) { /* cursor is at end of line: merge current line with next one (if there is a next one) */`
240	`struct line far *nextline = db->cursor->next;`	254	`struct line far *nextline = db->cursor->next;`
241	`if (db->cursor->next->len > 0) {`	255	`if (db->cursor->next->len > 0) {`
242	`void far *newptr = _frealloc(db->cursor, sizeof(struct line) + db->cursor->len + db->cursor->next->len + 1);`	256	`void far *newptr = _frealloc(db->cursor, sizeof(struct line) + db->cursor->len + db->cursor->next->len + 1);`
243	`if (newptr != NULL) {`	257	`if (newptr != NULL) {`
244	`db->cursor = newptr;`	258	`db->cursor = newptr;`
245	`_fmemcpy(db->cursor->payload + db->cursor->len, db->cursor->next->payload, db->cursor->next->len + 1);`	259	`_fmemcpy(db->cursor->payload + db->cursor->len, db->cursor->next->payload, db->cursor->next->len + 1);`
246	`db->cursor->len += db->cursor->next->len;`	260	`db->cursor->len += db->cursor->next->len;`
247	`/* update db->topscreen if needed */`	261	`/* update db->topscreen if needed */`
248	`if (cursorposy == 0) db->topscreen = db->cursor;`	262	`if (cursorposy == 0) db->topscreen = db->cursor;`
249	`}`	263	`}`
250	`}`	264	`}`
251	`db->cursor->next = db->cursor->next->next;`	265	`db->cursor->next = db->cursor->next->next;`
252	`db->cursor->next->prev = db->cursor;`	266	`db->cursor->next->prev = db->cursor;`
253	`if (db->cursor->prev != NULL) db->cursor->prev->next = db->cursor; /* in case realloc changed my pointer */`	267	`if (db->cursor->prev != NULL) db->cursor->prev->next = db->cursor; /* in case realloc changed my pointer */`
254	`_ffree(nextline);`	268	`_ffree(nextline);`
255	`*uidirtyfrom = cursorposy;`	269	`*uidirtyfrom = cursorposy;`
256	`*uidirtyto = 0xff;`	270	`*uidirtyto = 0xff;`
257	`}`	271	`}`
258	`}`	272	`}`
259		273
260		274
-		275	`static void bkspc(struct linedb db, unsigned char cursorposx, unsigned char cursorposy, unsigned char screenw, unsigned char uidirtyfrom, unsigned char *uidirtyto) {`
-		276
-		277	`/* backspace is basically "left + del", not applicable only if cursor is on 1st byte of the file */`
-		278	`if ((*cursorposx == 0) && (db->xoffset == 0) && (db->cursor->prev == NULL)) return;`
-		279
-		280	`cursor_left(db, cursorposx, cursorposy, screenw, uidirtyfrom, uidirtyto);`
-		281	`del(db, cursorposx, cursorposy, uidirtyfrom, uidirtyto);`
-		282	`}`
-		283
-		284
261	`/* a custom argv-parsing routine that looks directly inside the PSP, avoids the need`	285	`/* a custom argv-parsing routine that looks directly inside the PSP, avoids the need`
262	`* of argc and argv, saves some 330 bytes of binary size */`	286	`* of argc and argv, saves some 330 bytes of binary size */`
263	`static char *parseargv(void) {`	287	`static char *parseargv(void) {`
264	`char tail = (void )0x81; /* THIS WORKS ONLY IN SMALL MEMORY MODEL */`	288	`char tail = (void )0x81; /* THIS WORKS ONLY IN SMALL MEMORY MODEL */`
265	`unsigned char count = 0;`	289	`unsigned char count = 0;`
266	`char *argv[4];`	290	`char *argv[4];`
267		291
268	`while (count < 4) {`	292	`while (count < 4) {`
269	`/* jump to nearest arg */`	293	`/* jump to nearest arg */`
270	`while (*tail == ' ') {`	294	`while (*tail == ' ') {`
271	`*tail = 0;`	295	`*tail = 0;`
272	`tail++;`	296	`tail++;`
273	`}`	297	`}`
274		298
275	`if (*tail == '\r') {`	299	`if (*tail == '\r') {`
276	`*tail = 0;`	300	`*tail = 0;`
277	`break;`	301	`break;`
278	`}`	302	`}`
279		303
280	`argv[count++] = tail;`	304	`argv[count++] = tail;`
281		305
282	`/* jump to next delimiter */`	306	`/* jump to next delimiter */`
283	`while ((tail != ' ') && (tail != '\r')) tail++;`	307	`while ((tail != ' ') && (tail != '\r')) tail++;`
284	`}`	308	`}`
285		309
286	`/* check args now */`	310	`/* check args now */`
287	`if (count != 1) return(NULL);`	311	`if (count != 1) return(NULL);`
288		312
289	`return(argv[0]);`	313	`return(argv[0]);`
290	`}`	314	`}`
291		315
292		316
293	`static int loadfile(struct linedb db, const char fname) {`	317	`static int loadfile(struct linedb db, const char fname) {`
294	`char buff[1024];`	318	`char buff[1024];`
295	`unsigned int prevlen = 0, len, llen;`	319	`unsigned int prevlen = 0, len, llen;`
296	`int fd;`	320	`int fd;`
297	`int r = 0;`	321	`int r = 0;`
298		322
299	`if (_dos_open(fname, O_RDONLY, &fd) != 0) {`	323	`if (_dos_open(fname, O_RDONLY, &fd) != 0) {`
300	`mdr_coutraw_puts("Failed to open file:");`	324	`mdr_coutraw_puts("Failed to open file:");`
301	`mdr_coutraw_puts(fname);`	325	`mdr_coutraw_puts(fname);`
302	`return(-1);`	326	`return(-1);`
303	`}`	327	`}`
304		328
305	`do {`	329	`do {`
306	`if (_dos_read(fd, buff + prevlen, sizeof(buff) - prevlen, &len) == 0) {`	330	`if (_dos_read(fd, buff + prevlen, sizeof(buff) - prevlen, &len) == 0) {`
307	`len += prevlen;`	331	`len += prevlen;`
308	`} else {`	332	`} else {`
309	`len = prevlen;`	333	`len = prevlen;`
310	`}`	334	`}`
311		335
312	`/* look for nearest \n and replace with 0*/`	336	`/* look for nearest \n and replace with 0*/`
313	`for (llen = 0; buff[llen] != '\n'; llen++) {`	337	`for (llen = 0; buff[llen] != '\n'; llen++) {`
314	`if (llen == sizeof(buff)) break;`	338	`if (llen == sizeof(buff)) break;`
315	`}`	339	`}`
316	`buff[llen] = 0;`	340	`buff[llen] = 0;`
317	`if ((llen > 0) && (buff[llen - 1])) buff[llen - 1] = 0; /* trim \r if line ending is cr/lf */`	341	`if ((llen > 0) && (buff[llen - 1])) buff[llen - 1] = 0; /* trim \r if line ending is cr/lf */`
318	`if (line_add(db, buff) != 0) {`	342	`if (line_add(db, buff) != 0) {`
319	`mdr_coutraw_puts("out of memory");`	343	`mdr_coutraw_puts("out of memory");`
320	`r = -1;`	344	`r = -1;`
321	`break;`	345	`break;`
322	`}`	346	`}`
323		347
324	`len -= llen + 1;`	348	`len -= llen + 1;`
325	`memmove(buff, buff + llen + 1, len);`	349	`memmove(buff, buff + llen + 1, len);`
326	`prevlen = len;`	350	`prevlen = len;`
327	`} while (len > 0);`	351	`} while (len > 0);`
328		352
329	`_dos_close(fd);`	353	`_dos_close(fd);`
330		354
331	`return(r);`	355	`return(r);`
332	`}`	356	`}`
333		357
334		358
335	`int main(void) {`	359	`int main(void) {`
336	`const char *fname;`	360	`const char *fname;`
337	`struct linedb db;`	361	`struct linedb db;`
338	`unsigned char screenw = 0, screenh = 0;`	362	`unsigned char screenw = 0, screenh = 0;`
339	`unsigned char cursorposx = 0, cursorposy = 0;`	363	`unsigned char cursorposx = 0, cursorposy = 0;`
340	`unsigned char uidirtyfrom = 0, uidirtyto = 0xff; /* make sure to redraw entire UI at first run */`	364	`unsigned char uidirtyfrom = 0, uidirtyto = 0xff; /* make sure to redraw entire UI at first run */`
341		365
342	`bzero(&db, sizeof(db));`	366	`bzero(&db, sizeof(db));`
343		367
344	`svarlang_autoload_nlspath("sved");`	368	`svarlang_autoload_nlspath("sved");`
345		369
346	`fname = parseargv();`	370	`fname = parseargv();`
347		371
348	`if (fname == NULL) {`	372	`if (fname == NULL) {`
349	`mdr_coutraw_puts("usage: sved file.txt");`	373	`mdr_coutraw_puts(svarlang_str(1,0)); /* usage: sved file.txt */`
350	`return(0);`	374	`return(0);`
351	`}`	375	`}`
352		376
353	`/* load file */`	377	`/* load file */`
354	`if (loadfile(&db, fname) != 0) return(1);`	378	`if (loadfile(&db, fname) != 0) return(1);`
355		379
356	`/* add an empty line at end if not present already */`	380	`/* add an empty line at end if not present already */`
357	`if (db.cursor->len != 0) line_add(&db, "");`	381	`if (db.cursor->len != 0) line_add(&db, "");`
358		382
359	`if (mdr_cout_init(&screenw, &screenh)) load_colorscheme();`	383	`if (mdr_cout_init(&screenw, &screenh)) load_colorscheme();`
360	`ui_basic(screenw, screenh, fname);`	384	`ui_basic(screenw, screenh, fname);`
361		385
362	`db_rewind(&db);`	386	`db_rewind(&db);`
363		387
364	`for (;;) {`	388	`for (;;) {`
365	`int k;`	389	`int k;`
366		390
367	`check_cursor_not_after_eol(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`	391	`check_cursor_not_after_eol(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`
368	`mdr_cout_locate(cursorposy, cursorposx);`	392	`mdr_cout_locate(cursorposy, cursorposx);`
369		393
370	`if (uidirtyfrom != 0xff) {`	394	`if (uidirtyfrom != 0xff) {`
371	`ui_refresh(&db, screenw, screenh, uidirtyfrom, uidirtyto);`	395	`ui_refresh(&db, screenw, screenh, uidirtyfrom, uidirtyto);`
372	`uidirtyfrom = 0xff;`	396	`uidirtyfrom = 0xff;`
373	`}`	397	`}`
374		398
375	`k = keyb_getkey();`	399	`k = keyb_getkey();`
376		400
377	`if (k == 0x150) { /* down */`	401	`if (k == 0x150) { /* down */`
378	`cursor_down(&db, &cursorposy, screenh, &uidirtyfrom, &uidirtyto);`	402	`cursor_down(&db, &cursorposy, screenh, &uidirtyfrom, &uidirtyto);`
379		403
380	`} else if (k == 0x148) { /* up */`	404	`} else if (k == 0x148) { /* up */`
381	`cursor_up(&db, &cursorposy, &uidirtyfrom, &uidirtyto);`	405	`cursor_up(&db, &cursorposy, &uidirtyfrom, &uidirtyto);`
382		406
383	`} else if (k == 0x14D) { /* right */`	407	`} else if (k == 0x14D) { /* right */`
384	`if (db.cursor->len > db.xoffset + cursorposx) {`	408	`if (db.cursor->len > db.xoffset + cursorposx) {`
385	`if (cursorposx < screenw - 2) {`	409	`if (cursorposx < screenw - 2) {`
386	`cursorposx++;`	410	`cursorposx++;`
387	`} else {`	411	`} else {`
388	`db.xoffset++;`	412	`db.xoffset++;`
389	`uidirtyfrom = 0;`	413	`uidirtyfrom = 0;`
390	`uidirtyto = 0xff;`	414	`uidirtyto = 0xff;`
391	`}`	415	`}`
392	`} else {`	416	`} else {`
393	`cursor_down(&db, &cursorposy, screenh, &uidirtyfrom, &uidirtyto);`	417	`cursor_down(&db, &cursorposy, screenh, &uidirtyfrom, &uidirtyto);`
394	`cursor_home(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`	418	`cursor_home(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`
395	`}`	419	`}`
396		420
397	`} else if (k == 0x14B) { /* left */`	421	`} else if (k == 0x14B) { /* left */`
398	`if (cursorposx > 0) {`	-
399	`cursorposx--;`	-
400	`} else if (db.xoffset > 0) {`	-
401	`db.xoffset--;`	-
402	`uidirtyfrom = 0;`	-
403	`uidirtyto = 0xff;`	-
404	`} else if (db.cursor->prev != NULL) { /* jump to end of line above */`	-
405	`cursor_up(&db, &cursorposy, &uidirtyfrom, &uidirtyto);`	-
406	`cursor_eol(&db, &cursorposx, screenw, &uidirtyfrom, &uidirtyto);`	422	`cursor_left(&db, &cursorposx, &cursorposy, screenw, &uidirtyfrom, &uidirtyto);`
407	`}`	-
408		423
409	`} else if (k == 0x149) { /* pgup */`	424	`} else if (k == 0x149) { /* pgup */`
410	`// TODO`	425	`// TODO`
411		426
412	`} else if (k == 0x151) { /* pgdown */`	427	`} else if (k == 0x151) { /* pgdown */`
413	`// TODO`	428	`// TODO`
414		429
415	`} else if (k == 0x147) { /* home */`	430	`} else if (k == 0x147) { /* home */`
416	`cursor_home(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`	431	`cursor_home(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`
417		432
418	`} else if (k == 0x14F) { /* end */`	433	`} else if (k == 0x14F) { /* end */`
419	`cursor_eol(&db, &cursorposx, screenw, &uidirtyfrom, &uidirtyto);`	434	`cursor_eol(&db, &cursorposx, screenw, &uidirtyfrom, &uidirtyto);`
420		435
421	`} else if (k == 0x1B) { /* ESC */`	436	`} else if (k == 0x1B) { /* ESC */`
422	`break;`	437	`break;`
423		438
424	`} else if (k == 0x0D) { /* ENTER */`	439	`} else if (k == 0x0D) { /* ENTER */`
425	`/* add a new line */`	440	`/* add a new line */`
426	`if (line_add(&db, db.cursor->payload + db.xoffset + cursorposx) == 0) {`	441	`if (line_add(&db, db.cursor->payload + db.xoffset + cursorposx) == 0) {`
427	`/* trim the line above */`	442	`/* trim the line above */`
428	`db.cursor->prev->len = db.xoffset + cursorposx;`	443	`db.cursor->prev->len = db.xoffset + cursorposx;`
429	`db.cursor->prev->payload[db.cursor->prev->len] = 0;`	444	`db.cursor->prev->payload[db.cursor->prev->len] = 0;`
430	`/* move cursor to the (new) line below */`	445	`/* move cursor to the (new) line below */`
431	`cursorposx = 0;`	446	`cursorposx = 0;`
432	`if (cursorposy < screenh - 2) {`	447	`if (cursorposy < screenh - 2) {`
433	`uidirtyfrom = cursorposy;`	448	`uidirtyfrom = cursorposy;`
434	`cursorposy++;`	449	`cursorposy++;`
435	`} else {`	450	`} else {`
436	`db.topscreen = db.topscreen->next;`	451	`db.topscreen = db.topscreen->next;`
437	`uidirtyfrom = 0;`	452	`uidirtyfrom = 0;`
438	`}`	453	`}`
439	`uidirtyto = 0xff;`	454	`uidirtyto = 0xff;`
440	`} else {`	455	`} else {`
441	`/* ERROR: OUT OF MEMORY */`	456	`/* ERROR: OUT OF MEMORY */`
442	`}`	457	`}`
443		458
444	`} else if (k == 0x153) { /* DEL */`	459	`} else if (k == 0x153) { /* DEL */`
445	`del(&db, cursorposx, cursorposy, &uidirtyfrom, &uidirtyto);`	460	`del(&db, cursorposx, cursorposy, &uidirtyfrom, &uidirtyto);`
446		461
-		462	`} else if (k == 0x008) { /* BKSPC */`
-		463	`bkspc(&db, &cursorposx, &cursorposy, screenw, &uidirtyfrom, &uidirtyto);`
-		464
447	`} else { /* UNHANDLED KEY - TODO IGNORE THIS IN PRODUCTION RELEASE */`	465	`} else { /* UNHANDLED KEY - TODO IGNORE THIS IN PRODUCTION RELEASE */`
448	`char buff[4];`	466	`char buff[4];`
449	`const char *HEX = "0123456789ABCDEF";`	467	`const char *HEX = "0123456789ABCDEF";`
450	`buff[0] = HEX[(k >> 8) & 15];`	468	`buff[0] = HEX[(k >> 8) & 15];`
451	`buff[1] = HEX[(k >> 4) & 15];`	469	`buff[1] = HEX[(k >> 4) & 15];`
452	`buff[2] = HEX[k & 15];`	470	`buff[2] = HEX[k & 15];`
453	`mdr_cout_str(screenh - 1, 0, "UNHANDLED KEY: 0x", scheme[COL_STATUSBAR1], 17);`	471	`mdr_cout_str(screenh - 1, 0, "UNHANDLED KEY: 0x", scheme[COL_STATUSBAR1], 17);`
454	`mdr_cout_str(screenh - 1, 17, buff, scheme[COL_STATUSBAR1], 3);`	472	`mdr_cout_str(screenh - 1, 17, buff, scheme[COL_STATUSBAR1], 3);`
455	`keyb_getkey();`	473	`keyb_getkey();`
456	`break;`	474	`break;`
457	`}`	475	`}`
458	`}`	476	`}`
459		477
460	`mdr_cout_close();`	478	`mdr_cout_close();`
461		479
462	`/* TODO free memory */`	480	`/* TODO free memory */`
463		481
464	`return(0);`	482	`return(0);`
465	`}`	483	`}`
466		484

Subversion Repositories SvarDOS

(root)/sved/trunk/sved.c @ 1559 – Rev 1292 → 1302