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 "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 *prev;
  struct line *next;
  unsigned short len;
  char payload[1];
};
 
struct linedb {
  struct line *topscreen;
  struct line *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 *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 = calloc(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;
  memmove(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 *l;
 
  /* DEBUG TODO FIXME */
  static char m = 'a';
  m++;
  if (m > 'z') m = 'a';
 
  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) {
      len = mdr_cout_str(y, 0, l->payload + db->xoffset, scheme[COL_TXT], screenw - 1);
    } else {
      len = 0;
    }
    while (len < screenw - 1) mdr_cout_char(y, len++, ' ', scheme[COL_TXT]);
 
    /* FIXME DEBUG */
    mdr_cout_char(y, 0, m, scheme[COL_STATUSBAR1]);
 
    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 1286	Rev 1287
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		30
31	`#include "mdr\cout.h"`	31	`#include "mdr\cout.h"`
32	`#include "mdr\keyb.h"`	32	`#include "mdr\keyb.h"`
33		33
34	`#include "svarlang\svarlang.h"`	34	`#include "svarlang\svarlang.h"`
35		35
36	`#define COL_TXT 0`	36	`#define COL_TXT 0`
37	`#define COL_STATUSBAR1 1`	37	`#define COL_STATUSBAR1 1`
38	`#define COL_STATUSBAR2 2`	38	`#define COL_STATUSBAR2 2`
39	`#define COL_SCROLLBAR 3`	39	`#define COL_SCROLLBAR 3`
40	`/* preload the mono scheme (to be overloaded at runtime if color adapter present) */`	40	`/* preload the mono scheme (to be overloaded at runtime if color adapter present) */`
41	`static unsigned char scheme[] = {0x07, 0x70, 0x70, 0x70};`	41	`static unsigned char scheme[] = {0x07, 0x70, 0x70, 0x70};`
42		42
43	`#define SCROLL_CURSOR 0xB1`	43	`#define SCROLL_CURSOR 0xB1`
44		44
45		45
46	`struct line {`	46	`struct line {`
47	`struct line *prev;`	47	`struct line *prev;`
48	`struct line *next;`	48	`struct line *next;`
49	`unsigned short len;`	49	`unsigned short len;`
50	`char payload[1];`	50	`char payload[1];`
51	`};`	51	`};`
52		52
53	`struct linedb {`	53	`struct linedb {`
54	`struct line *topscreen;`	54	`struct line *topscreen;`
55	`struct line *cursor;`	55	`struct line *cursor;`
56	`unsigned short xoffset;`	56	`unsigned short xoffset;`
57	`};`	57	`};`
58		58
59		59
60		-
-		60	`/* returns non-zero on error */`
61	`void line_add(struct linedb db, const char line) {`	61	`int line_add(struct linedb db, const char line) {`
62	`unsigned short slen = strlen(line);`	62	`unsigned short slen = strlen(line);`
63	`struct line *l;`	63	`struct line *l;`
64		64
65	`/* trim out CR/LF line endings */`	65	`/* trim out CR/LF line endings */`
66	`if ((slen >= 2) && (line[slen - 2] == '\r')) {`	66	`if ((slen >= 2) && (line[slen - 2] == '\r')) {`
67	`slen -= 2;`	67	`slen -= 2;`
68	`} else if ((slen >= 1) && (line[slen - 1] == '\n')) {`	68	`} else if ((slen >= 1) && (line[slen - 1] == '\n')) {`
69	`slen--;`	69	`slen--;`
70	`}`	70	`}`
71		71
72	`l = calloc(1, sizeof(struct line) + slen + 1);`	72	`l = calloc(1, sizeof(struct line) + slen + 1);`
-		73	`if (l == NULL) return(-1);`
-		74
73	`l->prev = db->cursor;`	75	`l->prev = db->cursor;`
74	`if (db->cursor) {`	76	`if (db->cursor) {`
75	`l->next = db->cursor->next;`	77	`l->next = db->cursor->next;`
76	`db->cursor->next = l;`	78	`db->cursor->next = l;`
77	`l->next->prev = l;`	79	`l->next->prev = l;`
78	`}`	80	`}`
79	`db->cursor = l;`	81	`db->cursor = l;`
80	`memmove(l->payload, line, slen);`	82	`memmove(l->payload, line, slen);`
81	`l->len = slen;`	83	`l->len = slen;`
-		84
-		85	`return(0);`
82	`}`	86	`}`
83		87
84		88
85	`void db_rewind(struct linedb *db) {`	89	`void db_rewind(struct linedb *db) {`
86	`if (db->cursor == NULL) return;`	90	`if (db->cursor == NULL) return;`
87	`while (db->cursor->prev) db->cursor = db->cursor->prev;`	91	`while (db->cursor->prev) db->cursor = db->cursor->prev;`
88	`db->topscreen = db->cursor;`	92	`db->topscreen = db->cursor;`
89	`}`	93	`}`
90		94
91		95
92	`void load_colorscheme(void) {`	96	`void load_colorscheme(void) {`
93	`scheme[COL_TXT] = 0x17;`	97	`scheme[COL_TXT] = 0x17;`
94	`scheme[COL_STATUSBAR1] = 0x70;`	98	`scheme[COL_STATUSBAR1] = 0x70;`
95	`scheme[COL_STATUSBAR2] = 0x78;`	99	`scheme[COL_STATUSBAR2] = 0x78;`
96	`scheme[COL_SCROLLBAR] = 0x70;`	100	`scheme[COL_SCROLLBAR] = 0x70;`
97	`}`	101	`}`
98		102
99		103
100	`static void ui_basic(unsigned char screenw, unsigned char screenh, const char *fname) {`	104	`static void ui_basic(unsigned char screenw, unsigned char screenh, const char *fname) {`
101	`unsigned char i;`	105	`unsigned char i;`
102	`const char *s = "HELP";`	106	`const char *s = "HELP";`
103	`unsigned char helpcol = screenw - (strlen(s) + 4);`	107	`unsigned char helpcol = screenw - (strlen(s) + 4);`
104		108
105	`/* clear screen */`	109	`/* clear screen */`
106	`mdr_cout_cls(scheme[COL_TXT]);`	110	`mdr_cout_cls(scheme[COL_TXT]);`
107		111
108	`/* status bar */`	112	`/* status bar */`
109	`for (i = 0; i < helpcol; i++) {`	113	`for (i = 0; i < helpcol; i++) {`
110	`mdr_cout_char(screenh - 1, i, *fname, scheme[COL_STATUSBAR1]);`	114	`mdr_cout_char(screenh - 1, i, *fname, scheme[COL_STATUSBAR1]);`
111	`if (*fname != 0) fname++;`	115	`if (*fname != 0) fname++;`
112	`}`	116	`}`
113	`mdr_cout_str(screenh - 1, helpcol, " F1=", scheme[COL_STATUSBAR2], 40);`	117	`mdr_cout_str(screenh - 1, helpcol, " F1=", scheme[COL_STATUSBAR2], 40);`
114	`mdr_cout_str(screenh - 1, helpcol + 4, s, scheme[COL_STATUSBAR2], 40);`	118	`mdr_cout_str(screenh - 1, helpcol + 4, s, scheme[COL_STATUSBAR2], 40);`
115		119
116	`/* scroll bar */`	120	`/* scroll bar */`
117	`for (i = 0; i < (screenh - 1); i++) {`	121	`for (i = 0; i < (screenh - 1); i++) {`
118	`mdr_cout_char(i, screenw - 1, SCROLL_CURSOR, scheme[COL_SCROLLBAR]);`	122	`mdr_cout_char(i, screenw - 1, SCROLL_CURSOR, scheme[COL_SCROLLBAR]);`
119	`}`	123	`}`
120	`}`	124	`}`
121		125
122		126
123	`static void ui_refresh(const struct linedb *db, unsigned char screenw, unsigned char screenh, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	127	`static void ui_refresh(const struct linedb *db, unsigned char screenw, unsigned char screenh, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
124	`unsigned char y = 0;`	128	`unsigned char y = 0;`
125	`unsigned char len;`	129	`unsigned char len;`
126	`struct line *l;`	130	`struct line *l;`
127		131
128	`/* DEBUG TODO FIXME */`	132	`/* DEBUG TODO FIXME */`
129	`static char m = 'a';`	133	`static char m = 'a';`
130	`m++;`	134	`m++;`
131	`if (m > 'z') m = 'a';`	135	`if (m > 'z') m = 'a';`
132		136
133	`for (l = db->topscreen; l != NULL; l = l->next) {`	137	`for (l = db->topscreen; l != NULL; l = l->next) {`
134		138
135	`/* skip lines that do not to be refreshed */`	139	`/* skip lines that do not to be refreshed */`
136	`if ((y < uidirtyfrom) \|\| (y > uidirtyto)) continue;`	140	`if ((y < uidirtyfrom) \|\| (y > uidirtyto)) continue;`
137		141
138	`if (db->xoffset < l->len) {`	142	`if (db->xoffset < l->len) {`
139	`len = mdr_cout_str(y, 0, l->payload + db->xoffset, scheme[COL_TXT], screenw - 1);`	143	`len = mdr_cout_str(y, 0, l->payload + db->xoffset, scheme[COL_TXT], screenw - 1);`
140	`} else {`	144	`} else {`
141	`len = 0;`	145	`len = 0;`
142	`}`	146	`}`
143	`while (len < screenw - 1) mdr_cout_char(y, len++, ' ', scheme[COL_TXT]);`	147	`while (len < screenw - 1) mdr_cout_char(y, len++, ' ', scheme[COL_TXT]);`
144		148
145	`/* FIXME DEBUG */`	149	`/* FIXME DEBUG */`
146	`mdr_cout_char(y, 0, m, scheme[COL_STATUSBAR1]);`	150	`mdr_cout_char(y, 0, m, scheme[COL_STATUSBAR1]);`
147		151
148	`if (y == screenh - 2) break;`	152	`if (y == screenh - 2) break;`
149	`y++;`	153	`y++;`
150	`}`	154	`}`
151	`}`	155	`}`
152		156
153		157
154	`static void check_cursor_not_after_eol(struct linedb db, unsigned char cursorpos, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	158	`static void check_cursor_not_after_eol(struct linedb db, unsigned char cursorpos, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
155	`if (db->xoffset + *cursorpos <= db->cursor->len) return;`	159	`if (db->xoffset + *cursorpos <= db->cursor->len) return;`
156		160
157	`if (db->cursor->len < db->xoffset) {`	161	`if (db->cursor->len < db->xoffset) {`
158	`*cursorpos = 0;`	162	`*cursorpos = 0;`
159	`db->xoffset = db->cursor->len;`	163	`db->xoffset = db->cursor->len;`
160	`*uidirtyfrom = 0;`	164	`*uidirtyfrom = 0;`
161	`*uidirtyto = 0xff;`	165	`*uidirtyto = 0xff;`
162	`} else {`	166	`} else {`
163	`*cursorpos = db->cursor->len - db->xoffset;`	167	`*cursorpos = db->cursor->len - db->xoffset;`
164	`}`	168	`}`
165	`}`	169	`}`
166		170
167		171
168	`static void cursor_up(struct linedb db, unsigned char cursorposy, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	172	`static void cursor_up(struct linedb db, unsigned char cursorposy, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
169	`if (db->cursor->prev != NULL) {`	173	`if (db->cursor->prev != NULL) {`
170	`db->cursor = db->cursor->prev;`	174	`db->cursor = db->cursor->prev;`
171	`if (*cursorposy == 0) {`	175	`if (*cursorposy == 0) {`
172	`db->topscreen = db->cursor;`	176	`db->topscreen = db->cursor;`
173	`*uidirtyfrom = 0;`	177	`*uidirtyfrom = 0;`
174	`*uidirtyto = 0xff;`	178	`*uidirtyto = 0xff;`
175	`} else {`	179	`} else {`
176	`*cursorposy -= 1;`	180	`*cursorposy -= 1;`
177	`}`	181	`}`
178	`}`	182	`}`
179	`}`	183	`}`
180		184
181		185
182	`static void cursor_eol(struct linedb db, unsigned char cursorposx, unsigned char screenw, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	186	`static void cursor_eol(struct linedb db, unsigned char cursorposx, unsigned char screenw, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
183	`/* adjust xoffset to make sure eol is visible on screen */`	187	`/* adjust xoffset to make sure eol is visible on screen */`
184	`if (db->xoffset > db->cursor->len) {`	188	`if (db->xoffset > db->cursor->len) {`
185	`db->xoffset = db->cursor->len - 1;`	189	`db->xoffset = db->cursor->len - 1;`
186	`*uidirtyfrom = 0;`	190	`*uidirtyfrom = 0;`
187	`*uidirtyto = 0xff;`	191	`*uidirtyto = 0xff;`
188	`}`	192	`}`
189		193
190	`if (db->xoffset + screenw - 1 <= db->cursor->len) {`	194	`if (db->xoffset + screenw - 1 <= db->cursor->len) {`
191	`db->xoffset = db->cursor->len - screenw + 2;`	195	`db->xoffset = db->cursor->len - screenw + 2;`
192	`*uidirtyfrom = 0;`	196	`*uidirtyfrom = 0;`
193	`*uidirtyto = 0xff;`	197	`*uidirtyto = 0xff;`
194	`}`	198	`}`
195	`*cursorposx = db->cursor->len - db->xoffset;`	199	`*cursorposx = db->cursor->len - db->xoffset;`
196	`}`	200	`}`
197		201
198		202
199	`static void cursor_down(struct linedb db, unsigned char cursorposy, unsigned char screenh, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	203	`static void cursor_down(struct linedb db, unsigned char cursorposy, unsigned char screenh, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
200	`if (db->cursor->next != NULL) {`	204	`if (db->cursor->next != NULL) {`
201	`db->cursor = db->cursor->next;`	205	`db->cursor = db->cursor->next;`
202	`if (*cursorposy < screenh - 2) {`	206	`if (*cursorposy < screenh - 2) {`
203	`*cursorposy += 1;`	207	`*cursorposy += 1;`
204	`} else {`	208	`} else {`
205	`db->topscreen = db->topscreen->next;`	209	`db->topscreen = db->topscreen->next;`
206	`*uidirtyfrom = 0;`	210	`*uidirtyfrom = 0;`
207	`*uidirtyto = 0xff;`	211	`*uidirtyto = 0xff;`
208	`}`	212	`}`
209	`}`	213	`}`
210	`}`	214	`}`
211		215
212		216
213	`static void cursor_home(struct linedb db, unsigned char cursorposx, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	217	`static void cursor_home(struct linedb db, unsigned char cursorposx, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
214	`*cursorposx = 0;`	218	`*cursorposx = 0;`
215	`if (db->xoffset != 0) {`	219	`if (db->xoffset != 0) {`
216	`db->xoffset = 0;`	220	`db->xoffset = 0;`
217	`*uidirtyfrom = 0;`	221	`*uidirtyfrom = 0;`
218	`*uidirtyto = 0xff;`	222	`*uidirtyto = 0xff;`
219	`}`	223	`}`
220	`}`	224	`}`
221		225
222		226
223	`/* a custom argv-parsing routine that looks directly inside the PSP, avoids the need`	227	`/* a custom argv-parsing routine that looks directly inside the PSP, avoids the need`
224	`* of argc and argv, saves some 330 bytes of binary size */`	228	`* of argc and argv, saves some 330 bytes of binary size */`
225	`static char *parseargv(void) {`	229	`static char *parseargv(void) {`
226	`char tail = (void )0x81; /* THIS WORKS ONLY IN SMALL MEMORY MODEL */`	230	`char tail = (void )0x81; /* THIS WORKS ONLY IN SMALL MEMORY MODEL */`
227	`unsigned char count = 0;`	231	`unsigned char count = 0;`
228	`char *argv[4];`	232	`char *argv[4];`
229		233
230	`mdr_coutraw_puts(tail);`	-
231		-
232	`while (count < 4) {`	234	`while (count < 4) {`
233	`/* jump to nearest arg */`	235	`/* jump to nearest arg */`
234	`while (*tail == ' ') {`	236	`while (*tail == ' ') {`
235	`*tail = 0;`	237	`*tail = 0;`
236	`tail++;`	238	`tail++;`
237	`}`	239	`}`
238		240
239	`if (*tail == '\r') {`	241	`if (*tail == '\r') {`
240	`*tail = 0;`	242	`*tail = 0;`
241	`break;`	243	`break;`
242	`}`	244	`}`
243		245
244	`argv[count++] = tail;`	246	`argv[count++] = tail;`
245		247
246	`/* jump to next delimiter */`	248	`/* jump to next delimiter */`
247	`while ((tail != ' ') && (tail != '\r')) tail++;`	249	`while ((tail != ' ') && (tail != '\r')) tail++;`
248	`}`	250	`}`
249		251
250	`/* check args now */`	252	`/* check args now */`
251	`if (count != 1) return(NULL);`	253	`if (count != 1) return(NULL);`
252		254
253	`return(argv[0]);`	255	`return(argv[0]);`
254	`}`	256	`}`
255		257
256		258
-		259	`static int loadfile(struct linedb db, const char fname) {`
257	`int main(void) {`	260	`char buff[1024];`
-		261	`unsigned int prevlen = 0, len, llen;`
258	`int fd;`	262	`int fd;`
-		263	`int r = 0;`
-		264
-		265	`if (_dos_open(fname, O_RDONLY, &fd) != 0) {`
-		266	`mdr_coutraw_puts("Failed to open file:");`
-		267	`mdr_coutraw_puts(fname);`
-		268	`return(-1);`
-		269	`}`
-		270
-		271	`do {`
-		272	`if (_dos_read(fd, buff + prevlen, sizeof(buff) - prevlen, &len) == 0) {`
-		273	`len += prevlen;`
-		274	`} else {`
-		275	`len = prevlen;`
-		276	`}`
-		277
-		278	`/* look for nearest \n and replace with 0*/`
-		279	`for (llen = 0; buff[llen] != '\n'; llen++) {`
-		280	`if (llen == sizeof(buff)) break;`
-		281	`}`
-		282	`buff[llen] = 0;`
-		283	`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) {`
-		285	`mdr_coutraw_puts("out of memory");`
-		286	`r = -1;`
-		287	`break;`
-		288	`}`
-		289
-		290	`len -= llen + 1;`
-		291	`memmove(buff, buff + llen + 1, len);`
-		292	`prevlen = len;`
-		293	`} while (len > 0);`
-		294
-		295	`_dos_close(fd);`
-		296
-		297	`return(r);`
-		298	`}`
-		299
-		300
-		301	`int main(void) {`
259	`const char *fname;`	302	`const char *fname;`
260	`char buff[1024];`	-
261	`struct linedb db;`	303	`struct linedb db;`
262	`unsigned char screenw = 0, screenh = 0;`	304	`unsigned char screenw = 0, screenh = 0;`
263	`unsigned char cursorposx = 0, cursorposy = 0;`	305	`unsigned char cursorposx = 0, cursorposy = 0;`
264	`unsigned char uidirtyfrom = 0, uidirtyto = 0xff; /* make sure to redraw entire UI at first run */`	306	`unsigned char uidirtyfrom = 0, uidirtyto = 0xff; /* make sure to redraw entire UI at first run */`
265		307
266	`bzero(&db, sizeof(db));`	308	`bzero(&db, sizeof(db));`
267		309
268	`svarlang_autoload_nlspath("sved");`	310	`svarlang_autoload_nlspath("sved");`
269		311
270	`fname = parseargv();`	312	`fname = parseargv();`
271		313
272	`if (fname == NULL) {`	314	`if (fname == NULL) {`
273	`mdr_coutraw_puts("usage: sved file.txt");`	315	`mdr_coutraw_puts("usage: sved file.txt");`
274	`return(0);`	316	`return(0);`
275	`}`	317	`}`
276		318
277	`mdr_coutraw_puts("");`	-
278		-
279	`if (_dos_open(fname, O_RDONLY, &fd) != 0) {`	-
280	`mdr_coutraw_puts("Failed to open file:");`	-
281	`mdr_coutraw_puts(fname);`	-
282	`return(1);`	-
283	`}`	-
284		-
285	`/* load file */`	319	`/* load file */`
286	`{`	-
287	`unsigned int prevlen = 0, len, llen;`	320	`if (loadfile(&db, fname) != 0) return(1);`
288		-
289	`do {`	-
290	`if (_dos_read(fd, buff + prevlen, sizeof(buff) - prevlen, &len) != 0) break;`	-
291	`len += prevlen;`	-
292		-
293	`/* look for nearest \n and replace with 0*/`	-
294	`for (llen = 0; buff[llen] != '\n'; llen++) {`	-
295	`if (llen == sizeof(buff)) break;`	-
296	`}`	-
297	`buff[llen] = 0;`	-
298	`if ((llen > 0) && (buff[llen - 1])) buff[llen - 1] = 0; /* trim \r if line ending is cr/lf */`	-
299	`line_add(&db, buff);`	-
300		-
301	`len -= llen + 1;`	-
302	`memmove(buff, buff + llen + 1, len);`	-
303	`prevlen = len;`	-
304	`} while (len > 0);`	-
305		-
306	`}`	-
307		321
308	`/* add an empty line at end if not present already */`	322	`/* add an empty line at end if not present already */`
309	`if (db.cursor->len != 0) line_add(&db, "");`	323	`if (db.cursor->len != 0) line_add(&db, "");`
310		324
311	`_dos_close(fd);`	-
312		-
313	`if (mdr_cout_init(&screenw, &screenh)) load_colorscheme();`	325	`if (mdr_cout_init(&screenw, &screenh)) load_colorscheme();`
314	`ui_basic(screenw, screenh, fname);`	326	`ui_basic(screenw, screenh, fname);`
315		327
316	`db_rewind(&db);`	328	`db_rewind(&db);`
317		329
318	`for (;;) {`	330	`for (;;) {`
319	`int k;`	331	`int k;`
320		332
321	`check_cursor_not_after_eol(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`	333	`check_cursor_not_after_eol(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`
322	`mdr_cout_locate(cursorposy, cursorposx);`	334	`mdr_cout_locate(cursorposy, cursorposx);`
323		335
324	`if (uidirtyfrom != 0xff) {`	336	`if (uidirtyfrom != 0xff) {`
325	`ui_refresh(&db, screenw, screenh, uidirtyfrom, uidirtyto);`	337	`ui_refresh(&db, screenw, screenh, uidirtyfrom, uidirtyto);`
326	`uidirtyfrom = 0xff;`	338	`uidirtyfrom = 0xff;`
327	`}`	339	`}`
328		340
329	`k = keyb_getkey();`	341	`k = keyb_getkey();`
330		342
331	`if (k == 0x150) { /* down */`	343	`if (k == 0x150) { /* down */`
332	`cursor_down(&db, &cursorposy, screenh, &uidirtyfrom, &uidirtyto);`	344	`cursor_down(&db, &cursorposy, screenh, &uidirtyfrom, &uidirtyto);`
333		345
334	`} else if (k == 0x148) { /* up */`	346	`} else if (k == 0x148) { /* up */`
335	`cursor_up(&db, &cursorposy, &uidirtyfrom, &uidirtyto);`	347	`cursor_up(&db, &cursorposy, &uidirtyfrom, &uidirtyto);`
336		348
337	`} else if (k == 0x14D) { /* right */`	349	`} else if (k == 0x14D) { /* right */`
338	`if (db.cursor->len > db.xoffset + cursorposx) {`	350	`if (db.cursor->len > db.xoffset + cursorposx) {`
339	`if (cursorposx < screenw - 2) {`	351	`if (cursorposx < screenw - 2) {`
340	`cursorposx++;`	352	`cursorposx++;`
341	`} else {`	353	`} else {`
342	`db.xoffset++;`	354	`db.xoffset++;`
343	`uidirtyfrom = 0;`	355	`uidirtyfrom = 0;`
344	`uidirtyto = 0xff;`	356	`uidirtyto = 0xff;`
345	`}`	357	`}`
346	`} else {`	358	`} else {`
347	`cursor_down(&db, &cursorposy, screenh, &uidirtyfrom, &uidirtyto);`	359	`cursor_down(&db, &cursorposy, screenh, &uidirtyfrom, &uidirtyto);`
348	`cursor_home(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`	360	`cursor_home(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`
349	`}`	361	`}`
350		362
351	`} else if (k == 0x14B) { /* left */`	363	`} else if (k == 0x14B) { /* left */`
352	`if (cursorposx > 0) {`	364	`if (cursorposx > 0) {`
353	`cursorposx--;`	365	`cursorposx--;`
354	`} else if (db.xoffset > 0) {`	366	`} else if (db.xoffset > 0) {`
355	`db.xoffset--;`	367	`db.xoffset--;`
356	`uidirtyfrom = 0;`	368	`uidirtyfrom = 0;`
357	`uidirtyto = 0xff;`	369	`uidirtyto = 0xff;`
358	`} else if (db.cursor->prev != NULL) { /* jump to end of line above */`	370	`} else if (db.cursor->prev != NULL) { /* jump to end of line above */`
359	`cursor_up(&db, &cursorposy, &uidirtyfrom, &uidirtyto);`	371	`cursor_up(&db, &cursorposy, &uidirtyfrom, &uidirtyto);`
360	`cursor_eol(&db, &cursorposx, screenw, &uidirtyfrom, &uidirtyto);`	372	`cursor_eol(&db, &cursorposx, screenw, &uidirtyfrom, &uidirtyto);`
361	`}`	373	`}`
362		374
363	`} else if (k == 0x149) { /* pgup */`	375	`} else if (k == 0x149) { /* pgup */`
364	`// TODO`	376	`// TODO`
365		377
366	`} else if (k == 0x151) { /* pgdown */`	378	`} else if (k == 0x151) { /* pgdown */`
367	`// TODO`	379	`// TODO`
368		380
369	`} else if (k == 0x147) { /* home */`	381	`} else if (k == 0x147) { /* home */`
370	`cursor_home(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`	382	`cursor_home(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`
371		383
372	`} else if (k == 0x14F) { /* end */`	384	`} else if (k == 0x14F) { /* end */`
373	`cursor_eol(&db, &cursorposx, screenw, &uidirtyfrom, &uidirtyto);`	385	`cursor_eol(&db, &cursorposx, screenw, &uidirtyfrom, &uidirtyto);`
374		386
375	`} else if (k == 0x1B) { /* ESC */`	387	`} else if (k == 0x1B) { /* ESC */`
376	`break;`	388	`break;`
377		389
378	`} else { /* UNHANDLED KEY - TODO IGNORE THIS IN PRODUCTION RELEASE */`	390	`} else { /* UNHANDLED KEY - TODO IGNORE THIS IN PRODUCTION RELEASE */`
379	`char buff[4];`	391	`char buff[4];`
380	`const char *HEX = "0123456789ABCDEF";`	392	`const char *HEX = "0123456789ABCDEF";`
381	`buff[0] = HEX[(k >> 8) & 15];`	393	`buff[0] = HEX[(k >> 8) & 15];`
382	`buff[1] = HEX[(k >> 4) & 15];`	394	`buff[1] = HEX[(k >> 4) & 15];`
383	`buff[2] = HEX[k & 15];`	395	`buff[2] = HEX[k & 15];`
384	`mdr_cout_str(screenh - 1, 0, "UNHANDLED KEY: 0x", scheme[COL_STATUSBAR1], 17);`	396	`mdr_cout_str(screenh - 1, 0, "UNHANDLED KEY: 0x", scheme[COL_STATUSBAR1], 17);`
385	`mdr_cout_str(screenh - 1, 17, buff, scheme[COL_STATUSBAR1], 3);`	397	`mdr_cout_str(screenh - 1, 17, buff, scheme[COL_STATUSBAR1], 3);`
386	`keyb_getkey();`	398	`keyb_getkey();`
387	`break;`	399	`break;`
388	`}`	400	`}`
389	`}`	401	`}`
390		402
391	`mdr_cout_close();`	403	`mdr_cout_close();`
392		404
393	`/* TODO free memory */`	405	`/* TODO free memory */`
394		406
395	`return(0);`	407	`return(0);`
396	`}`	408	`}`
397		409

Subversion Repositories SvarDOS

(root)/sved/trunk/sved.c @ 1286 – Rev 1286 → 1287