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 */
int line_add(struct linedb *db, const char *line) {
  unsigned short slen = strlen(line);
  struct line far *l;
 
  /* 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);
}
 
 
void db_rewind(struct linedb *db) {
  if (db->cursor == NULL) return;
  while (db->cursor->prev) db->cursor = db->cursor->prev;
  db->topscreen = db->cursor;
}
 
 
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 = "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) {
 
    /* skip lines that do not to be refreshed */
    if ((y < uidirtyfrom) || (y > uidirtyto)) continue;
 
    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;
    y++;
  }
}
 
 
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_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;
  }
}
 
 
/* 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("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 */
      if (cursorposx > 0) {
        cursorposx--;
      } else if (db.xoffset > 0) {
        db.xoffset--;
        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);
      }
 
    } 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 { /* 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 1287	Rev 1288
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		31
31	`#include "mdr\cout.h"`	32	`#include "mdr\cout.h"`
32	`#include "mdr\keyb.h"`	33	`#include "mdr\keyb.h"`
33		34
34	`#include "svarlang\svarlang.h"`	35	`#include "svarlang\svarlang.h"`
35		36
36	`#define COL_TXT 0`	37	`#define COL_TXT 0`
37	`#define COL_STATUSBAR1 1`	38	`#define COL_STATUSBAR1 1`
38	`#define COL_STATUSBAR2 2`	39	`#define COL_STATUSBAR2 2`
39	`#define COL_SCROLLBAR 3`	40	`#define COL_SCROLLBAR 3`
40	`/* 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) */`
41	`static unsigned char scheme[] = {0x07, 0x70, 0x70, 0x70};`	42	`static unsigned char scheme[] = {0x07, 0x70, 0x70, 0x70};`
42		43
43	`#define SCROLL_CURSOR 0xB1`	44	`#define SCROLL_CURSOR 0xB1`
44		45
45		46
46	`struct line {`	47	`struct line {`
47	`struct line *prev;`	48	`struct line far *prev;`
48	`struct line *next;`	49	`struct line far *next;`
49	`unsigned short len;`	50	`unsigned short len;`
50	`char payload[1];`	51	`char payload[1];`
51	`};`	52	`};`
52		53
53	`struct linedb {`	54	`struct linedb {`
54	`struct line *topscreen;`	55	`struct line far *topscreen;`
55	`struct line *cursor;`	56	`struct line far *cursor;`
56	`unsigned short xoffset;`	57	`unsigned short xoffset;`
57	`};`	58	`};`
58		59
59		60
60	`/* returns non-zero on error */`	61	`/* returns non-zero on error */`
61	`int line_add(struct linedb db, const char line) {`	62	`int line_add(struct linedb db, const char line) {`
62	`unsigned short slen = strlen(line);`	63	`unsigned short slen = strlen(line);`
63	`struct line *l;`	64	`struct line far *l;`
64		65
65	`/* trim out CR/LF line endings */`	66	`/* trim out CR/LF line endings */`
66	`if ((slen >= 2) && (line[slen - 2] == '\r')) {`	67	`if ((slen >= 2) && (line[slen - 2] == '\r')) {`
67	`slen -= 2;`	68	`slen -= 2;`
68	`} else if ((slen >= 1) && (line[slen - 1] == '\n')) {`	69	`} else if ((slen >= 1) && (line[slen - 1] == '\n')) {`
69	`slen--;`	70	`slen--;`
70	`}`	71	`}`
71		72
72	`l = calloc(1, sizeof(struct line) + slen + 1);`	73	`l = _fcalloc(1, sizeof(struct line) + slen + 1);`
73	`if (l == NULL) return(-1);`	74	`if (l == NULL) return(-1);`
74		75
75	`l->prev = db->cursor;`	76	`l->prev = db->cursor;`
76	`if (db->cursor) {`	77	`if (db->cursor) {`
77	`l->next = db->cursor->next;`	78	`l->next = db->cursor->next;`
78	`db->cursor->next = l;`	79	`db->cursor->next = l;`
79	`l->next->prev = l;`	80	`l->next->prev = l;`
80	`}`	81	`}`
81	`db->cursor = l;`	82	`db->cursor = l;`
82	`memmove(l->payload, line, slen);`	83	`_fmemcpy(l->payload, line, slen);`
83	`l->len = slen;`	84	`l->len = slen;`
84		85
85	`return(0);`	86	`return(0);`
86	`}`	87	`}`
87		88
88		89
89	`void db_rewind(struct linedb *db) {`	90	`void db_rewind(struct linedb *db) {`
90	`if (db->cursor == NULL) return;`	91	`if (db->cursor == NULL) return;`
91	`while (db->cursor->prev) db->cursor = db->cursor->prev;`	92	`while (db->cursor->prev) db->cursor = db->cursor->prev;`
92	`db->topscreen = db->cursor;`	93	`db->topscreen = db->cursor;`
93	`}`	94	`}`
94		95
95		96
96	`void load_colorscheme(void) {`	97	`void load_colorscheme(void) {`
97	`scheme[COL_TXT] = 0x17;`	98	`scheme[COL_TXT] = 0x17;`
98	`scheme[COL_STATUSBAR1] = 0x70;`	99	`scheme[COL_STATUSBAR1] = 0x70;`
99	`scheme[COL_STATUSBAR2] = 0x78;`	100	`scheme[COL_STATUSBAR2] = 0x78;`
100	`scheme[COL_SCROLLBAR] = 0x70;`	101	`scheme[COL_SCROLLBAR] = 0x70;`
101	`}`	102	`}`
102		103
103		104
104	`static void ui_basic(unsigned char screenw, unsigned char screenh, const char *fname) {`	105	`static void ui_basic(unsigned char screenw, unsigned char screenh, const char *fname) {`
105	`unsigned char i;`	106	`unsigned char i;`
106	`const char *s = "HELP";`	107	`const char *s = "HELP";`
107	`unsigned char helpcol = screenw - (strlen(s) + 4);`	108	`unsigned char helpcol = screenw - (strlen(s) + 4);`
108		109
109	`/* clear screen */`	110	`/* clear screen */`
110	`mdr_cout_cls(scheme[COL_TXT]);`	111	`mdr_cout_cls(scheme[COL_TXT]);`
111		112
112	`/* status bar */`	113	`/* status bar */`
113	`for (i = 0; i < helpcol; i++) {`	114	`for (i = 0; i < helpcol; i++) {`
114	`mdr_cout_char(screenh - 1, i, *fname, scheme[COL_STATUSBAR1]);`	115	`mdr_cout_char(screenh - 1, i, *fname, scheme[COL_STATUSBAR1]);`
115	`if (*fname != 0) fname++;`	116	`if (*fname != 0) fname++;`
116	`}`	117	`}`
117	`mdr_cout_str(screenh - 1, helpcol, " F1=", scheme[COL_STATUSBAR2], 40);`	118	`mdr_cout_str(screenh - 1, helpcol, " F1=", scheme[COL_STATUSBAR2], 40);`
118	`mdr_cout_str(screenh - 1, helpcol + 4, s, scheme[COL_STATUSBAR2], 40);`	119	`mdr_cout_str(screenh - 1, helpcol + 4, s, scheme[COL_STATUSBAR2], 40);`
119		120
120	`/* scroll bar */`	121	`/* scroll bar */`
121	`for (i = 0; i < (screenh - 1); i++) {`	122	`for (i = 0; i < (screenh - 1); i++) {`
122	`mdr_cout_char(i, screenw - 1, SCROLL_CURSOR, scheme[COL_SCROLLBAR]);`	123	`mdr_cout_char(i, screenw - 1, SCROLL_CURSOR, scheme[COL_SCROLLBAR]);`
123	`}`	124	`}`
124	`}`	125	`}`
125		126
126		127
127	`static void ui_refresh(const struct linedb *db, unsigned char screenw, unsigned char screenh, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	128	`static void ui_refresh(const struct linedb *db, unsigned char screenw, unsigned char screenh, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
128	`unsigned char y = 0;`	129	`unsigned char y = 0;`
129	`unsigned char len;`	130	`unsigned char len;`
130	`struct line *l;`	131	`struct line far *l;`
131		132
132	`/* DEBUG TODO FIXME */`	133	`#ifdef DBG_REFRESH`
133	`static char m = 'a';`	134	`static char m = 'a';`
134	`m++;`	135	`m++;`
135	`if (m > 'z') m = 'a';`	136	`if (m > 'z') m = 'a';`
-		137	`#endif`
136		138
137	`for (l = db->topscreen; l != NULL; l = l->next) {`	139	`for (l = db->topscreen; l != NULL; l = l->next) {`
138		140
139	`/* skip lines that do not to be refreshed */`	141	`/* skip lines that do not to be refreshed */`
140	`if ((y < uidirtyfrom) \|\| (y > uidirtyto)) continue;`	142	`if ((y < uidirtyfrom) \|\| (y > uidirtyto)) continue;`
141		143
142	`if (db->xoffset < l->len) {`	144	`if (db->xoffset < l->len) {`
143	`len = mdr_cout_str(y, 0, l->payload + db->xoffset, scheme[COL_TXT], screenw - 1);`	145	`for (len = 0; l->payload[len] != 0; len++) mdr_cout_char(y, len, l->payload[len], scheme[COL_TXT]);`
144	`} else {`	146	`} else {`
145	`len = 0;`	147	`len = 0;`
146	`}`	148	`}`
147	`while (len < screenw - 1) mdr_cout_char(y, len++, ' ', scheme[COL_TXT]);`	149	`while (len < screenw - 1) mdr_cout_char(y, len++, ' ', scheme[COL_TXT]);`
148		150
149	`/* FIXME DEBUG */`	151	`#ifdef DBG_REFRESH`
150	`mdr_cout_char(y, 0, m, scheme[COL_STATUSBAR1]);`	152	`mdr_cout_char(y, 0, m, scheme[COL_STATUSBAR1]);`
-		153	`#endif`
151		154
152	`if (y == screenh - 2) break;`	155	`if (y == screenh - 2) break;`
153	`y++;`	156	`y++;`
154	`}`	157	`}`
155	`}`	158	`}`
156		159
157		160
158	`static void check_cursor_not_after_eol(struct linedb db, unsigned char cursorpos, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	161	`static void check_cursor_not_after_eol(struct linedb db, unsigned char cursorpos, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
159	`if (db->xoffset + *cursorpos <= db->cursor->len) return;`	162	`if (db->xoffset + *cursorpos <= db->cursor->len) return;`
160		163
161	`if (db->cursor->len < db->xoffset) {`	164	`if (db->cursor->len < db->xoffset) {`
162	`*cursorpos = 0;`	165	`*cursorpos = 0;`
163	`db->xoffset = db->cursor->len;`	166	`db->xoffset = db->cursor->len;`
164	`*uidirtyfrom = 0;`	167	`*uidirtyfrom = 0;`
165	`*uidirtyto = 0xff;`	168	`*uidirtyto = 0xff;`
166	`} else {`	169	`} else {`
167	`*cursorpos = db->cursor->len - db->xoffset;`	170	`*cursorpos = db->cursor->len - db->xoffset;`
168	`}`	171	`}`
169	`}`	172	`}`
170		173
171		174
172	`static void cursor_up(struct linedb db, unsigned char cursorposy, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	175	`static void cursor_up(struct linedb db, unsigned char cursorposy, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
173	`if (db->cursor->prev != NULL) {`	176	`if (db->cursor->prev != NULL) {`
174	`db->cursor = db->cursor->prev;`	177	`db->cursor = db->cursor->prev;`
175	`if (*cursorposy == 0) {`	178	`if (*cursorposy == 0) {`
176	`db->topscreen = db->cursor;`	179	`db->topscreen = db->cursor;`
177	`*uidirtyfrom = 0;`	180	`*uidirtyfrom = 0;`
178	`*uidirtyto = 0xff;`	181	`*uidirtyto = 0xff;`
179	`} else {`	182	`} else {`
180	`*cursorposy -= 1;`	183	`*cursorposy -= 1;`
181	`}`	184	`}`
182	`}`	185	`}`
183	`}`	186	`}`
184		187
185		188
186	`static void cursor_eol(struct linedb db, unsigned char cursorposx, unsigned char screenw, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	189	`static void cursor_eol(struct linedb db, unsigned char cursorposx, unsigned char screenw, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
187	`/* adjust xoffset to make sure eol is visible on screen */`	190	`/* adjust xoffset to make sure eol is visible on screen */`
188	`if (db->xoffset > db->cursor->len) {`	191	`if (db->xoffset > db->cursor->len) {`
189	`db->xoffset = db->cursor->len - 1;`	192	`db->xoffset = db->cursor->len - 1;`
190	`*uidirtyfrom = 0;`	193	`*uidirtyfrom = 0;`
191	`*uidirtyto = 0xff;`	194	`*uidirtyto = 0xff;`
192	`}`	195	`}`
193		196
194	`if (db->xoffset + screenw - 1 <= db->cursor->len) {`	197	`if (db->xoffset + screenw - 1 <= db->cursor->len) {`
195	`db->xoffset = db->cursor->len - screenw + 2;`	198	`db->xoffset = db->cursor->len - screenw + 2;`
196	`*uidirtyfrom = 0;`	199	`*uidirtyfrom = 0;`
197	`*uidirtyto = 0xff;`	200	`*uidirtyto = 0xff;`
198	`}`	201	`}`
199	`*cursorposx = db->cursor->len - db->xoffset;`	202	`*cursorposx = db->cursor->len - db->xoffset;`
200	`}`	203	`}`
201		204
202		205
203	`static void cursor_down(struct linedb db, unsigned char cursorposy, unsigned char screenh, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	206	`static void cursor_down(struct linedb db, unsigned char cursorposy, unsigned char screenh, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
204	`if (db->cursor->next != NULL) {`	207	`if (db->cursor->next != NULL) {`
205	`db->cursor = db->cursor->next;`	208	`db->cursor = db->cursor->next;`
206	`if (*cursorposy < screenh - 2) {`	209	`if (*cursorposy < screenh - 2) {`
207	`*cursorposy += 1;`	210	`*cursorposy += 1;`
208	`} else {`	211	`} else {`
209	`db->topscreen = db->topscreen->next;`	212	`db->topscreen = db->topscreen->next;`
210	`*uidirtyfrom = 0;`	213	`*uidirtyfrom = 0;`
211	`*uidirtyto = 0xff;`	214	`*uidirtyto = 0xff;`
212	`}`	215	`}`
213	`}`	216	`}`
214	`}`	217	`}`
215		218
216		219
217	`static void cursor_home(struct linedb db, unsigned char cursorposx, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	220	`static void cursor_home(struct linedb db, unsigned char cursorposx, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
218	`*cursorposx = 0;`	221	`*cursorposx = 0;`
219	`if (db->xoffset != 0) {`	222	`if (db->xoffset != 0) {`
220	`db->xoffset = 0;`	223	`db->xoffset = 0;`
221	`*uidirtyfrom = 0;`	224	`*uidirtyfrom = 0;`
222	`*uidirtyto = 0xff;`	225	`*uidirtyto = 0xff;`
223	`}`	226	`}`
224	`}`	227	`}`
225		228
226		229
227	`/* a custom argv-parsing routine that looks directly inside the PSP, avoids the need`	230	`/* a custom argv-parsing routine that looks directly inside the PSP, avoids the need`
228	`* of argc and argv, saves some 330 bytes of binary size */`	231	`* of argc and argv, saves some 330 bytes of binary size */`
229	`static char *parseargv(void) {`	232	`static char *parseargv(void) {`
230	`char tail = (void )0x81; /* THIS WORKS ONLY IN SMALL MEMORY MODEL */`	233	`char tail = (void )0x81; /* THIS WORKS ONLY IN SMALL MEMORY MODEL */`
231	`unsigned char count = 0;`	234	`unsigned char count = 0;`
232	`char *argv[4];`	235	`char *argv[4];`
233		236
234	`while (count < 4) {`	237	`while (count < 4) {`
235	`/* jump to nearest arg */`	238	`/* jump to nearest arg */`
236	`while (*tail == ' ') {`	239	`while (*tail == ' ') {`
237	`*tail = 0;`	240	`*tail = 0;`
238	`tail++;`	241	`tail++;`
239	`}`	242	`}`
240		243
241	`if (*tail == '\r') {`	244	`if (*tail == '\r') {`
242	`*tail = 0;`	245	`*tail = 0;`
243	`break;`	246	`break;`
244	`}`	247	`}`
245		248
246	`argv[count++] = tail;`	249	`argv[count++] = tail;`
247		250
248	`/* jump to next delimiter */`	251	`/* jump to next delimiter */`
249	`while ((tail != ' ') && (tail != '\r')) tail++;`	252	`while ((tail != ' ') && (tail != '\r')) tail++;`
250	`}`	253	`}`
251		254
252	`/* check args now */`	255	`/* check args now */`
253	`if (count != 1) return(NULL);`	256	`if (count != 1) return(NULL);`
254		257
255	`return(argv[0]);`	258	`return(argv[0]);`
256	`}`	259	`}`
257		260
258		261
259	`static int loadfile(struct linedb db, const char fname) {`	262	`static int loadfile(struct linedb db, const char fname) {`
260	`char buff[1024];`	263	`char buff[1024];`
261	`unsigned int prevlen = 0, len, llen;`	264	`unsigned int prevlen = 0, len, llen;`
262	`int fd;`	265	`int fd;`
263	`int r = 0;`	266	`int r = 0;`
264		267
265	`if (_dos_open(fname, O_RDONLY, &fd) != 0) {`	268	`if (_dos_open(fname, O_RDONLY, &fd) != 0) {`
266	`mdr_coutraw_puts("Failed to open file:");`	269	`mdr_coutraw_puts("Failed to open file:");`
267	`mdr_coutraw_puts(fname);`	270	`mdr_coutraw_puts(fname);`
268	`return(-1);`	271	`return(-1);`
269	`}`	272	`}`
270		273
271	`do {`	274	`do {`
272	`if (_dos_read(fd, buff + prevlen, sizeof(buff) - prevlen, &len) == 0) {`	275	`if (_dos_read(fd, buff + prevlen, sizeof(buff) - prevlen, &len) == 0) {`
273	`len += prevlen;`	276	`len += prevlen;`
274	`} else {`	277	`} else {`
275	`len = prevlen;`	278	`len = prevlen;`
276	`}`	279	`}`
277		280
278	`/* look for nearest \n and replace with 0*/`	281	`/* look for nearest \n and replace with 0*/`
279	`for (llen = 0; buff[llen] != '\n'; llen++) {`	282	`for (llen = 0; buff[llen] != '\n'; llen++) {`
280	`if (llen == sizeof(buff)) break;`	283	`if (llen == sizeof(buff)) break;`
281	`}`	284	`}`
282	`buff[llen] = 0;`	285	`buff[llen] = 0;`
283	`if ((llen > 0) && (buff[llen - 1])) buff[llen - 1] = 0; /* trim \r if line ending is cr/lf */`	286	`if ((llen > 0) && (buff[llen - 1])) buff[llen - 1] = 0; /* trim \r if line ending is cr/lf */`
284	`if (line_add(db, buff) != 0) {`	287	`if (line_add(db, buff) != 0) {`
285	`mdr_coutraw_puts("out of memory");`	288	`mdr_coutraw_puts("out of memory");`
286	`r = -1;`	289	`r = -1;`
287	`break;`	290	`break;`
288	`}`	291	`}`
289		292
290	`len -= llen + 1;`	293	`len -= llen + 1;`
291	`memmove(buff, buff + llen + 1, len);`	294	`memmove(buff, buff + llen + 1, len);`
292	`prevlen = len;`	295	`prevlen = len;`
293	`} while (len > 0);`	296	`} while (len > 0);`
294		297
295	`_dos_close(fd);`	298	`_dos_close(fd);`
296		299
297	`return(r);`	300	`return(r);`
298	`}`	301	`}`
299		302
300		303
301	`int main(void) {`	304	`int main(void) {`
302	`const char *fname;`	305	`const char *fname;`
303	`struct linedb db;`	306	`struct linedb db;`
304	`unsigned char screenw = 0, screenh = 0;`	307	`unsigned char screenw = 0, screenh = 0;`
305	`unsigned char cursorposx = 0, cursorposy = 0;`	308	`unsigned char cursorposx = 0, cursorposy = 0;`
306	`unsigned char uidirtyfrom = 0, uidirtyto = 0xff; /* make sure to redraw entire UI at first run */`	309	`unsigned char uidirtyfrom = 0, uidirtyto = 0xff; /* make sure to redraw entire UI at first run */`
307		310
308	`bzero(&db, sizeof(db));`	311	`bzero(&db, sizeof(db));`
309		312
310	`svarlang_autoload_nlspath("sved");`	313	`svarlang_autoload_nlspath("sved");`
311		314
312	`fname = parseargv();`	315	`fname = parseargv();`
313		316
314	`if (fname == NULL) {`	317	`if (fname == NULL) {`
315	`mdr_coutraw_puts("usage: sved file.txt");`	318	`mdr_coutraw_puts("usage: sved file.txt");`
316	`return(0);`	319	`return(0);`
317	`}`	320	`}`
318		321
319	`/* load file */`	322	`/* load file */`
320	`if (loadfile(&db, fname) != 0) return(1);`	323	`if (loadfile(&db, fname) != 0) return(1);`
321		324
322	`/* add an empty line at end if not present already */`	325	`/* add an empty line at end if not present already */`
323	`if (db.cursor->len != 0) line_add(&db, "");`	326	`if (db.cursor->len != 0) line_add(&db, "");`
324		327
325	`if (mdr_cout_init(&screenw, &screenh)) load_colorscheme();`	328	`if (mdr_cout_init(&screenw, &screenh)) load_colorscheme();`
326	`ui_basic(screenw, screenh, fname);`	329	`ui_basic(screenw, screenh, fname);`
327		330
328	`db_rewind(&db);`	331	`db_rewind(&db);`
329		332
330	`for (;;) {`	333	`for (;;) {`
331	`int k;`	334	`int k;`
332		335
333	`check_cursor_not_after_eol(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`	336	`check_cursor_not_after_eol(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`
334	`mdr_cout_locate(cursorposy, cursorposx);`	337	`mdr_cout_locate(cursorposy, cursorposx);`
335		338
336	`if (uidirtyfrom != 0xff) {`	339	`if (uidirtyfrom != 0xff) {`
337	`ui_refresh(&db, screenw, screenh, uidirtyfrom, uidirtyto);`	340	`ui_refresh(&db, screenw, screenh, uidirtyfrom, uidirtyto);`
338	`uidirtyfrom = 0xff;`	341	`uidirtyfrom = 0xff;`
339	`}`	342	`}`
340		343
341	`k = keyb_getkey();`	344	`k = keyb_getkey();`
342		345
343	`if (k == 0x150) { /* down */`	346	`if (k == 0x150) { /* down */`
344	`cursor_down(&db, &cursorposy, screenh, &uidirtyfrom, &uidirtyto);`	347	`cursor_down(&db, &cursorposy, screenh, &uidirtyfrom, &uidirtyto);`
345		348
346	`} else if (k == 0x148) { /* up */`	349	`} else if (k == 0x148) { /* up */`
347	`cursor_up(&db, &cursorposy, &uidirtyfrom, &uidirtyto);`	350	`cursor_up(&db, &cursorposy, &uidirtyfrom, &uidirtyto);`
348		351
349	`} else if (k == 0x14D) { /* right */`	352	`} else if (k == 0x14D) { /* right */`
350	`if (db.cursor->len > db.xoffset + cursorposx) {`	353	`if (db.cursor->len > db.xoffset + cursorposx) {`
351	`if (cursorposx < screenw - 2) {`	354	`if (cursorposx < screenw - 2) {`
352	`cursorposx++;`	355	`cursorposx++;`
353	`} else {`	356	`} else {`
354	`db.xoffset++;`	357	`db.xoffset++;`
355	`uidirtyfrom = 0;`	358	`uidirtyfrom = 0;`
356	`uidirtyto = 0xff;`	359	`uidirtyto = 0xff;`
357	`}`	360	`}`
358	`} else {`	361	`} else {`
359	`cursor_down(&db, &cursorposy, screenh, &uidirtyfrom, &uidirtyto);`	362	`cursor_down(&db, &cursorposy, screenh, &uidirtyfrom, &uidirtyto);`
360	`cursor_home(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`	363	`cursor_home(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`
361	`}`	364	`}`
362		365
363	`} else if (k == 0x14B) { /* left */`	366	`} else if (k == 0x14B) { /* left */`
364	`if (cursorposx > 0) {`	367	`if (cursorposx > 0) {`
365	`cursorposx--;`	368	`cursorposx--;`
366	`} else if (db.xoffset > 0) {`	369	`} else if (db.xoffset > 0) {`
367	`db.xoffset--;`	370	`db.xoffset--;`
368	`uidirtyfrom = 0;`	371	`uidirtyfrom = 0;`
369	`uidirtyto = 0xff;`	372	`uidirtyto = 0xff;`
370	`} else if (db.cursor->prev != NULL) { /* jump to end of line above */`	373	`} else if (db.cursor->prev != NULL) { /* jump to end of line above */`
371	`cursor_up(&db, &cursorposy, &uidirtyfrom, &uidirtyto);`	374	`cursor_up(&db, &cursorposy, &uidirtyfrom, &uidirtyto);`
372	`cursor_eol(&db, &cursorposx, screenw, &uidirtyfrom, &uidirtyto);`	375	`cursor_eol(&db, &cursorposx, screenw, &uidirtyfrom, &uidirtyto);`
373	`}`	376	`}`
374		377
375	`} else if (k == 0x149) { /* pgup */`	378	`} else if (k == 0x149) { /* pgup */`
376	`// TODO`	379	`// TODO`
377		380
378	`} else if (k == 0x151) { /* pgdown */`	381	`} else if (k == 0x151) { /* pgdown */`
379	`// TODO`	382	`// TODO`
380		383
381	`} else if (k == 0x147) { /* home */`	384	`} else if (k == 0x147) { /* home */`
382	`cursor_home(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`	385	`cursor_home(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`
383		386
384	`} else if (k == 0x14F) { /* end */`	387	`} else if (k == 0x14F) { /* end */`
385	`cursor_eol(&db, &cursorposx, screenw, &uidirtyfrom, &uidirtyto);`	388	`cursor_eol(&db, &cursorposx, screenw, &uidirtyfrom, &uidirtyto);`
386		389
387	`} else if (k == 0x1B) { /* ESC */`	390	`} else if (k == 0x1B) { /* ESC */`
388	`break;`	391	`break;`
389		392
390	`} else { /* UNHANDLED KEY - TODO IGNORE THIS IN PRODUCTION RELEASE */`	393	`} else { /* UNHANDLED KEY - TODO IGNORE THIS IN PRODUCTION RELEASE */`
391	`char buff[4];`	394	`char buff[4];`
392	`const char *HEX = "0123456789ABCDEF";`	395	`const char *HEX = "0123456789ABCDEF";`
393	`buff[0] = HEX[(k >> 8) & 15];`	396	`buff[0] = HEX[(k >> 8) & 15];`
394	`buff[1] = HEX[(k >> 4) & 15];`	397	`buff[1] = HEX[(k >> 4) & 15];`
395	`buff[2] = HEX[k & 15];`	398	`buff[2] = HEX[k & 15];`
396	`mdr_cout_str(screenh - 1, 0, "UNHANDLED KEY: 0x", scheme[COL_STATUSBAR1], 17);`	399	`mdr_cout_str(screenh - 1, 0, "UNHANDLED KEY: 0x", scheme[COL_STATUSBAR1], 17);`
397	`mdr_cout_str(screenh - 1, 17, buff, scheme[COL_STATUSBAR1], 3);`	400	`mdr_cout_str(screenh - 1, 17, buff, scheme[COL_STATUSBAR1], 3);`
398	`keyb_getkey();`	401	`keyb_getkey();`
399	`break;`	402	`break;`
400	`}`	403	`}`
401	`}`	404	`}`
402		405
403	`mdr_cout_close();`	406	`mdr_cout_close();`
404		407
405	`/* TODO free memory */`	408	`/* TODO free memory */`
406		409
407	`return(0);`	410	`return(0);`
408	`}`	411	`}`
409		412

Subversion Repositories SvarDOS

(root)/sved/trunk/sved.c @ 1560 – Rev 1287 → 1288