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;
};
 
 
 
void 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);
  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;
}
 
 
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;
  }
}
 
 
int main(int argc, char **argv) {
  int fd;
  const char *fname = NULL;
  char buff[1024];
  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");
 
  if ((argc != 2) || (argv[1][0] == '/')) {
    mdr_coutraw_puts("usage: sved file.txt");
    return(0);
  }
 
  fname = argv[1];
 
  mdr_coutraw_puts("");
 
  if (_dos_open(fname, O_RDONLY, &fd) != 0) {
    mdr_coutraw_puts("Failed to open file:");
    mdr_coutraw_puts(fname);
    return(1);
  }
 
  /* load file */
  {
    unsigned int prevlen = 0, len, llen;
 
    do {
      if (_dos_read(fd, buff + prevlen, sizeof(buff) - prevlen, &len) != 0) break;
      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 */
      line_add(&db, buff);
 
      len -= llen + 1;
      memmove(buff, buff + llen + 1, len);
      prevlen = len;
    } while (len > 0);
 
  }
 
  /* add an empty line at end if not present already */
  if (db.cursor->len != 0) line_add(&db, "");
 
  _dos_close(fd);
 
  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 1283	Rev 1284
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	`void line_add(struct linedb db, const char line) {`	61	`void line_add(struct linedb db, const char line) {`
61	`unsigned short slen = strlen(line);`	62	`unsigned short slen = strlen(line);`
62	`struct line *l;`	63	`struct line *l;`
63		64
64	`/* trim out CR/LF line endings */`	65	`/* trim out CR/LF line endings */`
65	`if ((slen >= 2) && (line[slen - 2] == '\r')) {`	66	`if ((slen >= 2) && (line[slen - 2] == '\r')) {`
66	`slen -= 2;`	67	`slen -= 2;`
67	`} else if ((slen >= 1) && (line[slen - 1] == '\n')) {`	68	`} else if ((slen >= 1) && (line[slen - 1] == '\n')) {`
68	`slen--;`	69	`slen--;`
69	`}`	70	`}`
70		71
71	`l = calloc(1, sizeof(struct line) + slen + 1);`	72	`l = calloc(1, sizeof(struct line) + slen + 1);`
72	`l->prev = db->cursor;`	73	`l->prev = db->cursor;`
73	`if (db->cursor) {`	74	`if (db->cursor) {`
74	`l->next = db->cursor->next;`	75	`l->next = db->cursor->next;`
75	`db->cursor->next = l;`	76	`db->cursor->next = l;`
76	`l->next->prev = l;`	77	`l->next->prev = l;`
77	`}`	78	`}`
78	`db->cursor = l;`	79	`db->cursor = l;`
79	`memcpy(l->payload, line, slen);`	80	`memmove(l->payload, line, slen);`
80	`l->len = slen;`	81	`l->len = slen;`
81	`}`	82	`}`
82		83
83		84
84	`void db_rewind(struct linedb *db) {`	85	`void db_rewind(struct linedb *db) {`
85	`if (db->cursor == NULL) return;`	86	`if (db->cursor == NULL) return;`
86	`while (db->cursor->prev) db->cursor = db->cursor->prev;`	87	`while (db->cursor->prev) db->cursor = db->cursor->prev;`
87	`db->topscreen = db->cursor;`	88	`db->topscreen = db->cursor;`
88	`}`	89	`}`
89		90
90		91
91	`void load_colorscheme(void) {`	92	`void load_colorscheme(void) {`
92	`scheme[COL_TXT] = 0x17;`	93	`scheme[COL_TXT] = 0x17;`
93	`scheme[COL_STATUSBAR1] = 0x70;`	94	`scheme[COL_STATUSBAR1] = 0x70;`
94	`scheme[COL_STATUSBAR2] = 0x78;`	95	`scheme[COL_STATUSBAR2] = 0x78;`
95	`scheme[COL_SCROLLBAR] = 0x70;`	96	`scheme[COL_SCROLLBAR] = 0x70;`
96	`}`	97	`}`
97		98
98		99
99	`static void ui_basic(unsigned char screenw, unsigned char screenh, const char *fname) {`	100	`static void ui_basic(unsigned char screenw, unsigned char screenh, const char *fname) {`
100	`unsigned char i;`	101	`unsigned char i;`
101	`const char *s = "HELP";`	102	`const char *s = "HELP";`
102	`unsigned char helpcol = screenw - (strlen(s) + 4);`	103	`unsigned char helpcol = screenw - (strlen(s) + 4);`
103		104
104	`/* clear screen */`	105	`/* clear screen */`
105	`mdr_cout_cls(scheme[COL_TXT]);`	106	`mdr_cout_cls(scheme[COL_TXT]);`
106		107
107	`/* status bar */`	108	`/* status bar */`
108	`for (i = 0; i < helpcol; i++) {`	109	`for (i = 0; i < helpcol; i++) {`
109	`mdr_cout_char(screenh - 1, i, *fname, scheme[COL_STATUSBAR1]);`	110	`mdr_cout_char(screenh - 1, i, *fname, scheme[COL_STATUSBAR1]);`
110	`if (*fname != 0) fname++;`	111	`if (*fname != 0) fname++;`
111	`}`	112	`}`
112	`mdr_cout_str(screenh - 1, helpcol, " F1=", scheme[COL_STATUSBAR2], 40);`	113	`mdr_cout_str(screenh - 1, helpcol, " F1=", scheme[COL_STATUSBAR2], 40);`
113	`mdr_cout_str(screenh - 1, helpcol + 4, s, scheme[COL_STATUSBAR2], 40);`	114	`mdr_cout_str(screenh - 1, helpcol + 4, s, scheme[COL_STATUSBAR2], 40);`
114		115
115	`/* scroll bar */`	116	`/* scroll bar */`
116	`for (i = 0; i < (screenh - 1); i++) {`	117	`for (i = 0; i < (screenh - 1); i++) {`
117	`mdr_cout_char(i, screenw - 1, SCROLL_CURSOR, scheme[COL_SCROLLBAR]);`	118	`mdr_cout_char(i, screenw - 1, SCROLL_CURSOR, scheme[COL_SCROLLBAR]);`
118	`}`	119	`}`
119	`}`	120	`}`
120		121
121		122
122	`static void ui_refresh(const struct linedb *db, unsigned char screenw, unsigned char screenh, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	123	`static void ui_refresh(const struct linedb *db, unsigned char screenw, unsigned char screenh, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
123	`unsigned char y = 0;`	124	`unsigned char y = 0;`
124	`unsigned char len;`	125	`unsigned char len;`
125	`struct line *l;`	126	`struct line *l;`
126		127
127	`/* DEBUG TODO FIXME */`	128	`/* DEBUG TODO FIXME */`
128	`static char m = 'a';`	129	`static char m = 'a';`
129	`m++;`	130	`m++;`
130	`if (m > 'z') m = 'a';`	131	`if (m > 'z') m = 'a';`
131		132
132	`for (l = db->topscreen; l != NULL; l = l->next) {`	133	`for (l = db->topscreen; l != NULL; l = l->next) {`
133		134
134	`/* skip lines that do not to be refreshed */`	135	`/* skip lines that do not to be refreshed */`
135	`if ((y < uidirtyfrom) \|\| (y > uidirtyto)) continue;`	136	`if ((y < uidirtyfrom) \|\| (y > uidirtyto)) continue;`
136		137
137	`if (db->xoffset < l->len) {`	138	`if (db->xoffset < l->len) {`
138	`len = mdr_cout_str(y, 0, l->payload + db->xoffset, scheme[COL_TXT], screenw - 1);`	139	`len = mdr_cout_str(y, 0, l->payload + db->xoffset, scheme[COL_TXT], screenw - 1);`
139	`} else {`	140	`} else {`
140	`len = 0;`	141	`len = 0;`
141	`}`	142	`}`
142	`while (len < screenw - 1) mdr_cout_char(y, len++, ' ', scheme[COL_TXT]);`	143	`while (len < screenw - 1) mdr_cout_char(y, len++, ' ', scheme[COL_TXT]);`
143		144
144	`/* FIXME DEBUG */`	145	`/* FIXME DEBUG */`
145	`mdr_cout_char(y, 0, m, scheme[COL_STATUSBAR1]);`	146	`mdr_cout_char(y, 0, m, scheme[COL_STATUSBAR1]);`
146		147
147	`if (y == screenh - 2) break;`	148	`if (y == screenh - 2) break;`
148	`y++;`	149	`y++;`
149	`}`	150	`}`
150	`}`	151	`}`
151		152
152		153
153	`static void check_cursor_not_after_eol(struct linedb db, unsigned char cursorpos, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	154	`static void check_cursor_not_after_eol(struct linedb db, unsigned char cursorpos, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
154	`if (db->xoffset + *cursorpos <= db->cursor->len) return;`	155	`if (db->xoffset + *cursorpos <= db->cursor->len) return;`
155		156
156	`if (db->cursor->len < db->xoffset) {`	157	`if (db->cursor->len < db->xoffset) {`
157	`*cursorpos = 0;`	158	`*cursorpos = 0;`
158	`db->xoffset = db->cursor->len;`	159	`db->xoffset = db->cursor->len;`
159	`*uidirtyfrom = 0;`	160	`*uidirtyfrom = 0;`
160	`*uidirtyto = 0xff;`	161	`*uidirtyto = 0xff;`
161	`} else {`	162	`} else {`
162	`*cursorpos = db->cursor->len - db->xoffset;`	163	`*cursorpos = db->cursor->len - db->xoffset;`
163	`}`	164	`}`
164	`}`	165	`}`
165		166
166		167
167	`static void cursor_up(struct linedb db, unsigned char cursorposy, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	168	`static void cursor_up(struct linedb db, unsigned char cursorposy, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
168	`if (db->cursor->prev != NULL) {`	169	`if (db->cursor->prev != NULL) {`
169	`db->cursor = db->cursor->prev;`	170	`db->cursor = db->cursor->prev;`
170	`if (*cursorposy == 0) {`	171	`if (*cursorposy == 0) {`
171	`db->topscreen = db->cursor;`	172	`db->topscreen = db->cursor;`
172	`*uidirtyfrom = 0;`	173	`*uidirtyfrom = 0;`
173	`*uidirtyto = 0xff;`	174	`*uidirtyto = 0xff;`
174	`} else {`	175	`} else {`
175	`*cursorposy -= 1;`	176	`*cursorposy -= 1;`
176	`}`	177	`}`
177	`}`	178	`}`
178	`}`	179	`}`
179		180
180		181
181	`static void cursor_eol(struct linedb db, unsigned char cursorposx, unsigned char screenw, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	182	`static void cursor_eol(struct linedb db, unsigned char cursorposx, unsigned char screenw, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
182	`/* adjust xoffset to make sure eol is visible on screen */`	183	`/* adjust xoffset to make sure eol is visible on screen */`
183	`if (db->xoffset > db->cursor->len) {`	184	`if (db->xoffset > db->cursor->len) {`
184	`db->xoffset = db->cursor->len - 1;`	185	`db->xoffset = db->cursor->len - 1;`
185	`*uidirtyfrom = 0;`	186	`*uidirtyfrom = 0;`
186	`*uidirtyto = 0xff;`	187	`*uidirtyto = 0xff;`
187	`}`	188	`}`
188		189
189	`if (db->xoffset + screenw - 1 <= db->cursor->len) {`	190	`if (db->xoffset + screenw - 1 <= db->cursor->len) {`
190	`db->xoffset = db->cursor->len - screenw + 2;`	191	`db->xoffset = db->cursor->len - screenw + 2;`
191	`*uidirtyfrom = 0;`	192	`*uidirtyfrom = 0;`
192	`*uidirtyto = 0xff;`	193	`*uidirtyto = 0xff;`
193	`}`	194	`}`
194	`*cursorposx = db->cursor->len - db->xoffset;`	195	`*cursorposx = db->cursor->len - db->xoffset;`
195	`}`	196	`}`
196		197
197		198
198	`static void cursor_down(struct linedb db, unsigned char cursorposy, unsigned char screenh, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	199	`static void cursor_down(struct linedb db, unsigned char cursorposy, unsigned char screenh, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
199	`if (db->cursor->next != NULL) {`	200	`if (db->cursor->next != NULL) {`
200	`db->cursor = db->cursor->next;`	201	`db->cursor = db->cursor->next;`
201	`if (*cursorposy < screenh - 2) {`	202	`if (*cursorposy < screenh - 2) {`
202	`*cursorposy += 1;`	203	`*cursorposy += 1;`
203	`} else {`	204	`} else {`
204	`db->topscreen = db->topscreen->next;`	205	`db->topscreen = db->topscreen->next;`
205	`*uidirtyfrom = 0;`	206	`*uidirtyfrom = 0;`
206	`*uidirtyto = 0xff;`	207	`*uidirtyto = 0xff;`
207	`}`	208	`}`
208	`}`	209	`}`
209	`}`	210	`}`
210		211
211		212
212	`static void cursor_home(struct linedb db, unsigned char cursorposx, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	213	`static void cursor_home(struct linedb db, unsigned char cursorposx, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
213	`*cursorposx = 0;`	214	`*cursorposx = 0;`
214	`if (db->xoffset != 0) {`	215	`if (db->xoffset != 0) {`
215	`db->xoffset = 0;`	216	`db->xoffset = 0;`
216	`*uidirtyfrom = 0;`	217	`*uidirtyfrom = 0;`
217	`*uidirtyto = 0xff;`	218	`*uidirtyto = 0xff;`
218	`}`	219	`}`
219	`}`	220	`}`
220		221
221		222
222	`int main(int argc, char **argv) {`	223	`int main(int argc, char **argv) {`
223	`int fd;`	224	`int fd;`
224	`const char *fname = NULL;`	225	`const char *fname = NULL;`
225	`char buff[1024];`	226	`char buff[1024];`
226	`struct linedb db;`	227	`struct linedb db;`
227	`unsigned char screenw = 0, screenh = 0;`	228	`unsigned char screenw = 0, screenh = 0;`
228	`unsigned char cursorposx = 0, cursorposy = 0;`	229	`unsigned char cursorposx = 0, cursorposy = 0;`
229	`unsigned char uidirtyfrom = 0, uidirtyto = 0xff; /* make sure to redraw entire UI at first run */`	230	`unsigned char uidirtyfrom = 0, uidirtyto = 0xff; /* make sure to redraw entire UI at first run */`
230		231
231	`bzero(&db, sizeof(db));`	232	`bzero(&db, sizeof(db));`
232		233
233	`svarlang_autoload_nlspath("sved");`	234	`svarlang_autoload_nlspath("sved");`
234		235
235	`if ((argc != 2) \|\| (argv[1][0] == '/')) {`	236	`if ((argc != 2) \|\| (argv[1][0] == '/')) {`
236	`mdr_coutraw_puts("usage: sved file.txt");`	237	`mdr_coutraw_puts("usage: sved file.txt");`
237	`return(0);`	238	`return(0);`
238	`}`	239	`}`
239		240
240	`fname = argv[1];`	241	`fname = argv[1];`
241		242
242	`mdr_coutraw_puts("");`	243	`mdr_coutraw_puts("");`
243		244
244	`if (_dos_open(fname, O_RDONLY, &fd) != 0) {`	245	`if (_dos_open(fname, O_RDONLY, &fd) != 0) {`
245	`mdr_coutraw_puts("Failed to open file:");`	246	`mdr_coutraw_puts("Failed to open file:");`
246	`mdr_coutraw_puts(fname);`	247	`mdr_coutraw_puts(fname);`
247	`return(1);`	248	`return(1);`
248	`}`	249	`}`
249		250
250	`/* load file */`	251	`/* load file */`
251	`{`	252	`{`
252	`unsigned int prevlen = 0, len, llen;`	253	`unsigned int prevlen = 0, len, llen;`
253		254
254	`do {`	255	`do {`
255	`if (_dos_read(fd, buff + prevlen, sizeof(buff) - prevlen, &len) != 0) break;`	256	`if (_dos_read(fd, buff + prevlen, sizeof(buff) - prevlen, &len) != 0) break;`
256	`len += prevlen;`	257	`len += prevlen;`
257		258
258	`/* look for nearest \n and replace with 0*/`	259	`/* look for nearest \n and replace with 0*/`
259	`for (llen = 0; buff[llen] != '\n'; llen++) {`	260	`for (llen = 0; buff[llen] != '\n'; llen++) {`
260	`if (llen == sizeof(buff)) break;`	261	`if (llen == sizeof(buff)) break;`
261	`}`	262	`}`
262	`buff[llen] = 0;`	263	`buff[llen] = 0;`
263	`if ((llen > 0) && (buff[llen - 1])) buff[llen - 1] = 0; /* trim \r if line ending is cr/lf */`	264	`if ((llen > 0) && (buff[llen - 1])) buff[llen - 1] = 0; /* trim \r if line ending is cr/lf */`
264	`line_add(&db, buff);`	265	`line_add(&db, buff);`
265		266
266	`len -= llen + 1;`	267	`len -= llen + 1;`
267	`memmove(buff, buff + llen + 1, len);`	268	`memmove(buff, buff + llen + 1, len);`
268	`prevlen = len;`	269	`prevlen = len;`
269	`} while (len > 0);`	270	`} while (len > 0);`
270		271
271	`}`	272	`}`
272		273
273	`/* add an empty line at end if not present already */`	274	`/* add an empty line at end if not present already */`
274	`if (db.cursor->len != 0) line_add(&db, "");`	275	`if (db.cursor->len != 0) line_add(&db, "");`
275		276
276	`_dos_close(fd);`	277	`_dos_close(fd);`
277		278
278	`if (mdr_cout_init(&screenw, &screenh)) load_colorscheme();`	279	`if (mdr_cout_init(&screenw, &screenh)) load_colorscheme();`
279	`ui_basic(screenw, screenh, fname);`	280	`ui_basic(screenw, screenh, fname);`
280		281
281	`db_rewind(&db);`	282	`db_rewind(&db);`
282		283
283	`for (;;) {`	284	`for (;;) {`
284	`int k;`	285	`int k;`
285		286
286	`check_cursor_not_after_eol(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`	287	`check_cursor_not_after_eol(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`
287	`mdr_cout_locate(cursorposy, cursorposx);`	288	`mdr_cout_locate(cursorposy, cursorposx);`
288		289
289	`if (uidirtyfrom != 0xff) {`	290	`if (uidirtyfrom != 0xff) {`
290	`ui_refresh(&db, screenw, screenh, uidirtyfrom, uidirtyto);`	291	`ui_refresh(&db, screenw, screenh, uidirtyfrom, uidirtyto);`
291	`uidirtyfrom = 0xff;`	292	`uidirtyfrom = 0xff;`
292	`}`	293	`}`
293		294
294	`k = keyb_getkey();`	295	`k = keyb_getkey();`
295		296
296	`if (k == 0x150) { /* down */`	297	`if (k == 0x150) { /* down */`
297	`cursor_down(&db, &cursorposy, screenh, &uidirtyfrom, &uidirtyto);`	298	`cursor_down(&db, &cursorposy, screenh, &uidirtyfrom, &uidirtyto);`
298		299
299	`} else if (k == 0x148) { /* up */`	300	`} else if (k == 0x148) { /* up */`
300	`cursor_up(&db, &cursorposy, &uidirtyfrom, &uidirtyto);`	301	`cursor_up(&db, &cursorposy, &uidirtyfrom, &uidirtyto);`
301		302
302	`} else if (k == 0x14D) { /* right */`	303	`} else if (k == 0x14D) { /* right */`
303	`if (db.cursor->len > db.xoffset + cursorposx) {`	304	`if (db.cursor->len > db.xoffset + cursorposx) {`
304	`if (cursorposx < screenw - 2) {`	305	`if (cursorposx < screenw - 2) {`
305	`cursorposx++;`	306	`cursorposx++;`
306	`} else {`	307	`} else {`
307	`db.xoffset++;`	308	`db.xoffset++;`
308	`uidirtyfrom = 0;`	309	`uidirtyfrom = 0;`
309	`uidirtyto = 0xff;`	310	`uidirtyto = 0xff;`
310	`}`	311	`}`
311	`} else {`	312	`} else {`
312	`cursor_down(&db, &cursorposy, screenh, &uidirtyfrom, &uidirtyto);`	313	`cursor_down(&db, &cursorposy, screenh, &uidirtyfrom, &uidirtyto);`
313	`cursor_home(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`	314	`cursor_home(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`
314	`}`	315	`}`
315		316
316	`} else if (k == 0x14B) { /* left */`	317	`} else if (k == 0x14B) { /* left */`
317	`if (cursorposx > 0) {`	318	`if (cursorposx > 0) {`
318	`cursorposx--;`	319	`cursorposx--;`
319	`} else if (db.xoffset > 0) {`	320	`} else if (db.xoffset > 0) {`
320	`db.xoffset--;`	321	`db.xoffset--;`
321	`uidirtyfrom = 0;`	322	`uidirtyfrom = 0;`
322	`uidirtyto = 0xff;`	323	`uidirtyto = 0xff;`
323	`} else if (db.cursor->prev != NULL) { /* jump to end of line above */`	324	`} else if (db.cursor->prev != NULL) { /* jump to end of line above */`
324	`cursor_up(&db, &cursorposy, &uidirtyfrom, &uidirtyto);`	325	`cursor_up(&db, &cursorposy, &uidirtyfrom, &uidirtyto);`
325	`cursor_eol(&db, &cursorposx, screenw, &uidirtyfrom, &uidirtyto);`	326	`cursor_eol(&db, &cursorposx, screenw, &uidirtyfrom, &uidirtyto);`
326	`}`	327	`}`
327		328
328	`} else if (k == 0x149) { /* pgup */`	329	`} else if (k == 0x149) { /* pgup */`
329	`// TODO`	330	`// TODO`
330		331
331	`} else if (k == 0x151) { /* pgdown */`	332	`} else if (k == 0x151) { /* pgdown */`
332	`// TODO`	333	`// TODO`
333		334
334	`} else if (k == 0x147) { /* home */`	335	`} else if (k == 0x147) { /* home */`
335	`cursor_home(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`	336	`cursor_home(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`
336		337
337	`} else if (k == 0x14F) { /* end */`	338	`} else if (k == 0x14F) { /* end */`
338	`cursor_eol(&db, &cursorposx, screenw, &uidirtyfrom, &uidirtyto);`	339	`cursor_eol(&db, &cursorposx, screenw, &uidirtyfrom, &uidirtyto);`
339		340
340	`} else if (k == 0x1B) { /* ESC */`	341	`} else if (k == 0x1B) { /* ESC */`
341	`break;`	342	`break;`
342		343
343	`} else { /* UNHANDLED KEY - TODO IGNORE THIS IN PRODUCTION RELEASE */`	344	`} else { /* UNHANDLED KEY - TODO IGNORE THIS IN PRODUCTION RELEASE */`
344	`char buff[4];`	345	`char buff[4];`
345	`const char *HEX = "0123456789ABCDEF";`	346	`const char *HEX = "0123456789ABCDEF";`
346	`buff[0] = HEX[(k >> 8) & 15];`	347	`buff[0] = HEX[(k >> 8) & 15];`
347	`buff[1] = HEX[(k >> 4) & 15];`	348	`buff[1] = HEX[(k >> 4) & 15];`
348	`buff[2] = HEX[k & 15];`	349	`buff[2] = HEX[k & 15];`
349	`mdr_cout_str(screenh - 1, 0, "UNHANDLED KEY: 0x", scheme[COL_STATUSBAR1], 17);`	350	`mdr_cout_str(screenh - 1, 0, "UNHANDLED KEY: 0x", scheme[COL_STATUSBAR1], 17);`
350	`mdr_cout_str(screenh - 1, 17, buff, scheme[COL_STATUSBAR1], 3);`	351	`mdr_cout_str(screenh - 1, 17, buff, scheme[COL_STATUSBAR1], 3);`
351	`keyb_getkey();`	352	`keyb_getkey();`
352	`break;`	353	`break;`
353	`}`	354	`}`
354	`}`	355	`}`
355		356
356	`mdr_cout_close();`	357	`mdr_cout_close();`
357		358
358	`/* TODO free memory */`	359	`/* TODO free memory */`
359		360
360	`return(0);`	361	`return(0);`
361	`}`	362	`}`
362		363

Subversion Repositories SvarDOS

(root)/sved/trunk/sved.c @ 1309 – Rev 1283 → 1284