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;
  memcpy(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 1282	Rev 1283
-		1	`/* Sved, the SvarDOS editor`
-		2	`*`
-		3	`* Copyright (C) 2023 Mateusz Viste`
-		4	`*`
-		5	`* Sved is released under the terms of the MIT license.`
-		6	`*`
-		7	`* Permission is hereby granted, free of charge, to any person obtaining a copy`
-		8	`* of this software and associated documentation files (the "Software"), to`
-		9	`* deal in the Software without restriction, including without limitation the`
-		10	`* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or`
-		11	`* sell copies of the Software, and to permit persons to whom the Software is`
-		12	`* furnished to do so, subject to the following conditions:`
-		13	`*`
-		14	`* The above copyright notice and this permission notice shall be included in`
-		15	`* all copies or substantial portions of the Software.`
-		16	`*`
-		17	`* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR`
-		18	`* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,`
-		19	`* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE`
-		20	`* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER`
-		21	`* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING`
-		22	`* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS`
-		23	`* IN THE SOFTWARE.`
1	`/* */`	24	`*/`
2		25
3	`#include <dos.h>`	26	`#include <dos.h>`
4	`#include <fcntl.h>`	27	`#include <fcntl.h>`
5	`#include <stdlib.h>`	28	`#include <stdlib.h>`
6	`#include <string.h>`	29	`#include <string.h>`
7		30
8	`#include "mdr\cout.h"`	31	`#include "mdr\cout.h"`
9	`#include "mdr\keyb.h"`	32	`#include "mdr\keyb.h"`
10		33
11	`#include "svarlang\svarlang.h"`	34	`#include "svarlang\svarlang.h"`
12		35
13	`#define COL_TXT 0`	36	`#define COL_TXT 0`
14	`#define COL_STATUSBAR1 1`	37	`#define COL_STATUSBAR1 1`
15	`#define COL_STATUSBAR2 2`	38	`#define COL_STATUSBAR2 2`
16	`#define COL_SCROLLBAR 3`	39	`#define COL_SCROLLBAR 3`
17	`/* 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) */`
18	`static unsigned char scheme[] = {0x07, 0x70, 0x70, 0x70};`	41	`static unsigned char scheme[] = {0x07, 0x70, 0x70, 0x70};`
19		42
20	`#define SCROLL_CURSOR 0xB1`	43	`#define SCROLL_CURSOR 0xB1`
21		44
22		45
23	`struct line {`	46	`struct line {`
24	`struct line *prev;`	47	`struct line *prev;`
25	`struct line *next;`	48	`struct line *next;`
26	`unsigned short len;`	49	`unsigned short len;`
27	`char payload[1];`	50	`char payload[1];`
28	`};`	51	`};`
29		52
30	`struct linedb {`	53	`struct linedb {`
31	`struct line *topscreen;`	54	`struct line *topscreen;`
32	`struct line *cursor;`	55	`struct line *cursor;`
33	`unsigned short xoffset;`	56	`unsigned short xoffset;`
34	`};`	57	`};`
35		58
36		59
37	`void line_add(struct linedb db, const char line) {`	60	`void line_add(struct linedb db, const char line) {`
38	`unsigned short slen = strlen(line);`	61	`unsigned short slen = strlen(line);`
39	`struct line *l;`	62	`struct line *l;`
40		63
41	`/* trim out CR/LF line endings */`	64	`/* trim out CR/LF line endings */`
42	`if ((slen >= 2) && (line[slen - 2] == '\r')) {`	65	`if ((slen >= 2) && (line[slen - 2] == '\r')) {`
43	`slen -= 2;`	66	`slen -= 2;`
44	`} else if ((slen >= 1) && (line[slen - 1] == '\n')) {`	67	`} else if ((slen >= 1) && (line[slen - 1] == '\n')) {`
45	`slen--;`	68	`slen--;`
46	`}`	69	`}`
47		70
48	`l = calloc(1, sizeof(struct line) + slen + 1);`	71	`l = calloc(1, sizeof(struct line) + slen + 1);`
49	`l->prev = db->cursor;`	72	`l->prev = db->cursor;`
50	`if (db->cursor) {`	73	`if (db->cursor) {`
51	`l->next = db->cursor->next;`	74	`l->next = db->cursor->next;`
52	`db->cursor->next = l;`	75	`db->cursor->next = l;`
53	`l->next->prev = l;`	76	`l->next->prev = l;`
54	`}`	77	`}`
55	`db->cursor = l;`	78	`db->cursor = l;`
56	`memcpy(l->payload, line, slen);`	79	`memcpy(l->payload, line, slen);`
57	`l->len = slen;`	80	`l->len = slen;`
58	`}`	81	`}`
59		82
60		83
61	`void db_rewind(struct linedb *db) {`	84	`void db_rewind(struct linedb *db) {`
62	`if (db->cursor == NULL) return;`	85	`if (db->cursor == NULL) return;`
63	`while (db->cursor->prev) db->cursor = db->cursor->prev;`	86	`while (db->cursor->prev) db->cursor = db->cursor->prev;`
64	`db->topscreen = db->cursor;`	87	`db->topscreen = db->cursor;`
65	`}`	88	`}`
66		89
67		90
68	`void load_colorscheme(void) {`	91	`void load_colorscheme(void) {`
69	`scheme[COL_TXT] = 0x17;`	92	`scheme[COL_TXT] = 0x17;`
70	`scheme[COL_STATUSBAR1] = 0x70;`	93	`scheme[COL_STATUSBAR1] = 0x70;`
71	`scheme[COL_STATUSBAR2] = 0x78;`	94	`scheme[COL_STATUSBAR2] = 0x78;`
72	`scheme[COL_SCROLLBAR] = 0x70;`	95	`scheme[COL_SCROLLBAR] = 0x70;`
73	`}`	96	`}`
74		97
75		98
76	`static void ui_basic(unsigned char screenw, unsigned char screenh, const char *fname) {`	99	`static void ui_basic(unsigned char screenw, unsigned char screenh, const char *fname) {`
77	`unsigned char i;`	100	`unsigned char i;`
78	`const char *s = "HELP";`	101	`const char *s = "HELP";`
79	`unsigned char helpcol = screenw - (strlen(s) + 4);`	102	`unsigned char helpcol = screenw - (strlen(s) + 4);`
80		103
81	`/* clear screen */`	104	`/* clear screen */`
82	`mdr_cout_cls(scheme[COL_TXT]);`	105	`mdr_cout_cls(scheme[COL_TXT]);`
83		106
84	`/* status bar */`	107	`/* status bar */`
85	`for (i = 0; i < helpcol; i++) {`	108	`for (i = 0; i < helpcol; i++) {`
86	`mdr_cout_char(screenh - 1, i, *fname, scheme[COL_STATUSBAR1]);`	109	`mdr_cout_char(screenh - 1, i, *fname, scheme[COL_STATUSBAR1]);`
87	`if (*fname != 0) fname++;`	110	`if (*fname != 0) fname++;`
88	`}`	111	`}`
89	`mdr_cout_str(screenh - 1, helpcol, " F1=", scheme[COL_STATUSBAR2], 40);`	112	`mdr_cout_str(screenh - 1, helpcol, " F1=", scheme[COL_STATUSBAR2], 40);`
90	`mdr_cout_str(screenh - 1, helpcol + 4, s, scheme[COL_STATUSBAR2], 40);`	113	`mdr_cout_str(screenh - 1, helpcol + 4, s, scheme[COL_STATUSBAR2], 40);`
91		114
92	`/* scroll bar */`	115	`/* scroll bar */`
93	`for (i = 0; i < (screenh - 1); i++) {`	116	`for (i = 0; i < (screenh - 1); i++) {`
94	`mdr_cout_char(i, screenw - 1, SCROLL_CURSOR, scheme[COL_SCROLLBAR]);`	117	`mdr_cout_char(i, screenw - 1, SCROLL_CURSOR, scheme[COL_SCROLLBAR]);`
95	`}`	118	`}`
96	`}`	119	`}`
97		120
98		121
99	`static void ui_refresh(const struct linedb *db, unsigned char screenw, unsigned char screenh, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	122	`static void ui_refresh(const struct linedb *db, unsigned char screenw, unsigned char screenh, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
100	`unsigned char y = 0;`	123	`unsigned char y = 0;`
101	`unsigned char len;`	124	`unsigned char len;`
102	`struct line *l;`	125	`struct line *l;`
103		126
104	`/* DEBUG TODO FIXME */`	127	`/* DEBUG TODO FIXME */`
105	`static char m = 'a';`	128	`static char m = 'a';`
106	`m++;`	129	`m++;`
107	`if (m > 'z') m = 'a';`	130	`if (m > 'z') m = 'a';`
108		131
109	`for (l = db->topscreen; l != NULL; l = l->next) {`	132	`for (l = db->topscreen; l != NULL; l = l->next) {`
110		133
111	`/* skip lines that do not to be refreshed */`	134	`/* skip lines that do not to be refreshed */`
112	`if ((y < uidirtyfrom) \|\| (y > uidirtyto)) continue;`	135	`if ((y < uidirtyfrom) \|\| (y > uidirtyto)) continue;`
113		136
114	`if (db->xoffset < l->len) {`	137	`if (db->xoffset < l->len) {`
115	`len = mdr_cout_str(y, 0, l->payload + db->xoffset, scheme[COL_TXT], screenw - 1);`	138	`len = mdr_cout_str(y, 0, l->payload + db->xoffset, scheme[COL_TXT], screenw - 1);`
116	`} else {`	139	`} else {`
117	`len = 0;`	140	`len = 0;`
118	`}`	141	`}`
119	`while (len < screenw - 1) mdr_cout_char(y, len++, ' ', scheme[COL_TXT]);`	142	`while (len < screenw - 1) mdr_cout_char(y, len++, ' ', scheme[COL_TXT]);`
120		143
121	`/* FIXME DEBUG */`	144	`/* FIXME DEBUG */`
122	`mdr_cout_char(y, 0, m, scheme[COL_STATUSBAR1]);`	145	`mdr_cout_char(y, 0, m, scheme[COL_STATUSBAR1]);`
123		146
124	`if (y == screenh - 2) break;`	147	`if (y == screenh - 2) break;`
125	`y++;`	148	`y++;`
126	`}`	149	`}`
127	`}`	150	`}`
128		151
129		152
130	`static void check_cursor_not_after_eol(struct linedb db, unsigned char cursorpos, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	153	`static void check_cursor_not_after_eol(struct linedb db, unsigned char cursorpos, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
131	`if (db->xoffset + *cursorpos <= db->cursor->len) return;`	154	`if (db->xoffset + *cursorpos <= db->cursor->len) return;`
132		155
133	`if (db->cursor->len < db->xoffset) {`	156	`if (db->cursor->len < db->xoffset) {`
134	`*cursorpos = 0;`	157	`*cursorpos = 0;`
135	`db->xoffset = db->cursor->len;`	158	`db->xoffset = db->cursor->len;`
136	`*uidirtyfrom = 0;`	159	`*uidirtyfrom = 0;`
137	`*uidirtyto = 0xff;`	160	`*uidirtyto = 0xff;`
138	`} else {`	161	`} else {`
139	`*cursorpos = db->cursor->len - db->xoffset;`	162	`*cursorpos = db->cursor->len - db->xoffset;`
140	`}`	163	`}`
141	`}`	164	`}`
142		165
143		166
144	`static void cursor_up(struct linedb db, unsigned char cursorposy, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	167	`static void cursor_up(struct linedb db, unsigned char cursorposy, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
145	`if (db->cursor->prev != NULL) {`	168	`if (db->cursor->prev != NULL) {`
146	`db->cursor = db->cursor->prev;`	169	`db->cursor = db->cursor->prev;`
147	`if (*cursorposy == 0) {`	170	`if (*cursorposy == 0) {`
148	`db->topscreen = db->cursor;`	171	`db->topscreen = db->cursor;`
149	`*uidirtyfrom = 0;`	172	`*uidirtyfrom = 0;`
150	`*uidirtyto = 0xff;`	173	`*uidirtyto = 0xff;`
151	`} else {`	174	`} else {`
152	`*cursorposy -= 1;`	175	`*cursorposy -= 1;`
153	`}`	176	`}`
154	`}`	177	`}`
155	`}`	178	`}`
156		179
157		180
158	`static void cursor_eol(struct linedb db, unsigned char cursorposx, unsigned char screenw, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	181	`static void cursor_eol(struct linedb db, unsigned char cursorposx, unsigned char screenw, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
159	`/* adjust xoffset to make sure eol is visible on screen */`	182	`/* adjust xoffset to make sure eol is visible on screen */`
160	`if (db->xoffset > db->cursor->len) {`	183	`if (db->xoffset > db->cursor->len) {`
161	`db->xoffset = db->cursor->len - 1;`	184	`db->xoffset = db->cursor->len - 1;`
162	`*uidirtyfrom = 0;`	185	`*uidirtyfrom = 0;`
163	`*uidirtyto = 0xff;`	186	`*uidirtyto = 0xff;`
164	`}`	187	`}`
165		188
166	`if (db->xoffset + screenw - 1 <= db->cursor->len) {`	189	`if (db->xoffset + screenw - 1 <= db->cursor->len) {`
167	`db->xoffset = db->cursor->len - screenw + 2;`	190	`db->xoffset = db->cursor->len - screenw + 2;`
168	`*uidirtyfrom = 0;`	191	`*uidirtyfrom = 0;`
169	`*uidirtyto = 0xff;`	192	`*uidirtyto = 0xff;`
170	`}`	193	`}`
171	`*cursorposx = db->cursor->len - db->xoffset;`	194	`*cursorposx = db->cursor->len - db->xoffset;`
172	`}`	195	`}`
173		196
174		197
175	`static void cursor_down(struct linedb db, unsigned char cursorposy, unsigned char screenh, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	198	`static void cursor_down(struct linedb db, unsigned char cursorposy, unsigned char screenh, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
176	`if (db->cursor->next != NULL) {`	199	`if (db->cursor->next != NULL) {`
177	`db->cursor = db->cursor->next;`	200	`db->cursor = db->cursor->next;`
178	`if (*cursorposy < screenh - 2) {`	201	`if (*cursorposy < screenh - 2) {`
179	`*cursorposy += 1;`	202	`*cursorposy += 1;`
180	`} else {`	203	`} else {`
181	`db->topscreen = db->topscreen->next;`	204	`db->topscreen = db->topscreen->next;`
182	`*uidirtyfrom = 0;`	205	`*uidirtyfrom = 0;`
183	`*uidirtyto = 0xff;`	206	`*uidirtyto = 0xff;`
184	`}`	207	`}`
185	`}`	208	`}`
186	`}`	209	`}`
187		210
188		211
189	`static void cursor_home(struct linedb db, unsigned char cursorposx, unsigned char uidirtyfrom, unsigned char uidirtyto) {`	212	`static void cursor_home(struct linedb db, unsigned char cursorposx, unsigned char uidirtyfrom, unsigned char uidirtyto) {`
190	`*cursorposx = 0;`	213	`*cursorposx = 0;`
191	`if (db->xoffset != 0) {`	214	`if (db->xoffset != 0) {`
192	`db->xoffset = 0;`	215	`db->xoffset = 0;`
193	`*uidirtyfrom = 0;`	216	`*uidirtyfrom = 0;`
194	`*uidirtyto = 0xff;`	217	`*uidirtyto = 0xff;`
195	`}`	218	`}`
196	`}`	219	`}`
197		220
198		221
199	`int main(int argc, char **argv) {`	222	`int main(int argc, char **argv) {`
200	`int fd;`	223	`int fd;`
201	`const char *fname = NULL;`	224	`const char *fname = NULL;`
202	`char buff[1024];`	225	`char buff[1024];`
203	`struct linedb db;`	226	`struct linedb db;`
204	`unsigned char screenw = 0, screenh = 0;`	227	`unsigned char screenw = 0, screenh = 0;`
205	`unsigned char cursorposx = 0, cursorposy = 0;`	228	`unsigned char cursorposx = 0, cursorposy = 0;`
206	`unsigned char uidirtyfrom = 0, uidirtyto = 0xff; /* make sure to redraw entire UI at first run */`	229	`unsigned char uidirtyfrom = 0, uidirtyto = 0xff; /* make sure to redraw entire UI at first run */`
207		230
208	`bzero(&db, sizeof(db));`	231	`bzero(&db, sizeof(db));`
209		232
210	`svarlang_autoload_nlspath("sved");`	233	`svarlang_autoload_nlspath("sved");`
211		234
212	`if ((argc != 2) \|\| (argv[1][0] == '/')) {`	235	`if ((argc != 2) \|\| (argv[1][0] == '/')) {`
213	`mdr_coutraw_puts("usage: sved file.txt");`	236	`mdr_coutraw_puts("usage: sved file.txt");`
214	`return(0);`	237	`return(0);`
215	`}`	238	`}`
216		239
217	`fname = argv[1];`	240	`fname = argv[1];`
218		241
219	`mdr_coutraw_puts("");`	242	`mdr_coutraw_puts("");`
220		243
221	`if (_dos_open(fname, O_RDONLY, &fd) != 0) {`	244	`if (_dos_open(fname, O_RDONLY, &fd) != 0) {`
222	`mdr_coutraw_puts("Failed to open file:");`	245	`mdr_coutraw_puts("Failed to open file:");`
223	`mdr_coutraw_puts(fname);`	246	`mdr_coutraw_puts(fname);`
224	`return(1);`	247	`return(1);`
225	`}`	248	`}`
226		249
227	`/* load file */`	250	`/* load file */`
228	`{`	251	`{`
229	`unsigned int prevlen = 0, len, llen;`	252	`unsigned int prevlen = 0, len, llen;`
230		253
231	`do {`	254	`do {`
232	`if (_dos_read(fd, buff + prevlen, sizeof(buff) - prevlen, &len) != 0) break;`	255	`if (_dos_read(fd, buff + prevlen, sizeof(buff) - prevlen, &len) != 0) break;`
233	`len += prevlen;`	256	`len += prevlen;`
234		257
235	`/* look for nearest \n and replace with 0*/`	258	`/* look for nearest \n and replace with 0*/`
236	`for (llen = 0; buff[llen] != '\n'; llen++) {`	259	`for (llen = 0; buff[llen] != '\n'; llen++) {`
237	`if (llen == sizeof(buff)) break;`	260	`if (llen == sizeof(buff)) break;`
238	`}`	261	`}`
239	`buff[llen] = 0;`	262	`buff[llen] = 0;`
240	`if ((llen > 0) && (buff[llen - 1])) buff[llen - 1] = 0; /* trim \r if line ending is cr/lf */`	263	`if ((llen > 0) && (buff[llen - 1])) buff[llen - 1] = 0; /* trim \r if line ending is cr/lf */`
241	`line_add(&db, buff);`	264	`line_add(&db, buff);`
242		265
243	`len -= llen + 1;`	266	`len -= llen + 1;`
244	`memmove(buff, buff + llen + 1, len);`	267	`memmove(buff, buff + llen + 1, len);`
245	`prevlen = len;`	268	`prevlen = len;`
246	`} while (len > 0);`	269	`} while (len > 0);`
247		270
248	`}`	271	`}`
249		272
250	`/* add an empty line at end if not present already */`	273	`/* add an empty line at end if not present already */`
251	`if (db.cursor->len != 0) line_add(&db, "");`	274	`if (db.cursor->len != 0) line_add(&db, "");`
252		275
253	`_dos_close(fd);`	276	`_dos_close(fd);`
254		277
255	`if (mdr_cout_init(&screenw, &screenh)) load_colorscheme();`	278	`if (mdr_cout_init(&screenw, &screenh)) load_colorscheme();`
256	`ui_basic(screenw, screenh, fname);`	279	`ui_basic(screenw, screenh, fname);`
257		280
258	`db_rewind(&db);`	281	`db_rewind(&db);`
259		282
260	`for (;;) {`	283	`for (;;) {`
261	`int k;`	284	`int k;`
262		285
263	`check_cursor_not_after_eol(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`	286	`check_cursor_not_after_eol(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`
264	`mdr_cout_locate(cursorposy, cursorposx);`	287	`mdr_cout_locate(cursorposy, cursorposx);`
265		288
266	`if (uidirtyfrom != 0xff) {`	289	`if (uidirtyfrom != 0xff) {`
267	`ui_refresh(&db, screenw, screenh, uidirtyfrom, uidirtyto);`	290	`ui_refresh(&db, screenw, screenh, uidirtyfrom, uidirtyto);`
268	`uidirtyfrom = 0xff;`	291	`uidirtyfrom = 0xff;`
269	`}`	292	`}`
270		293
271	`k = keyb_getkey();`	294	`k = keyb_getkey();`
272		295
273	`if (k == 0x150) { /* down */`	296	`if (k == 0x150) { /* down */`
274	`cursor_down(&db, &cursorposy, screenh, &uidirtyfrom, &uidirtyto);`	297	`cursor_down(&db, &cursorposy, screenh, &uidirtyfrom, &uidirtyto);`
275		298
276	`} else if (k == 0x148) { /* up */`	299	`} else if (k == 0x148) { /* up */`
277	`cursor_up(&db, &cursorposy, &uidirtyfrom, &uidirtyto);`	300	`cursor_up(&db, &cursorposy, &uidirtyfrom, &uidirtyto);`
278		301
279	`} else if (k == 0x14D) { /* right */`	302	`} else if (k == 0x14D) { /* right */`
280	`if (db.cursor->len > db.xoffset + cursorposx) {`	303	`if (db.cursor->len > db.xoffset + cursorposx) {`
281	`if (cursorposx < screenw - 2) {`	304	`if (cursorposx < screenw - 2) {`
282	`cursorposx++;`	305	`cursorposx++;`
283	`} else {`	306	`} else {`
284	`db.xoffset++;`	307	`db.xoffset++;`
285	`uidirtyfrom = 0;`	308	`uidirtyfrom = 0;`
286	`uidirtyto = 0xff;`	309	`uidirtyto = 0xff;`
287	`}`	310	`}`
288	`} else {`	311	`} else {`
289	`cursor_down(&db, &cursorposy, screenh, &uidirtyfrom, &uidirtyto);`	312	`cursor_down(&db, &cursorposy, screenh, &uidirtyfrom, &uidirtyto);`
290	`cursor_home(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`	313	`cursor_home(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`
291	`}`	314	`}`
292		315
293	`} else if (k == 0x14B) { /* left */`	316	`} else if (k == 0x14B) { /* left */`
294	`if (cursorposx > 0) {`	317	`if (cursorposx > 0) {`
295	`cursorposx--;`	318	`cursorposx--;`
296	`} else if (db.xoffset > 0) {`	319	`} else if (db.xoffset > 0) {`
297	`db.xoffset--;`	320	`db.xoffset--;`
298	`uidirtyfrom = 0;`	321	`uidirtyfrom = 0;`
299	`uidirtyto = 0xff;`	322	`uidirtyto = 0xff;`
300	`} else if (db.cursor->prev != NULL) { /* jump to end of line above */`	323	`} else if (db.cursor->prev != NULL) { /* jump to end of line above */`
301	`cursor_up(&db, &cursorposy, &uidirtyfrom, &uidirtyto);`	324	`cursor_up(&db, &cursorposy, &uidirtyfrom, &uidirtyto);`
302	`cursor_eol(&db, &cursorposx, screenw, &uidirtyfrom, &uidirtyto);`	325	`cursor_eol(&db, &cursorposx, screenw, &uidirtyfrom, &uidirtyto);`
303	`}`	326	`}`
304		327
305	`} else if (k == 0x149) { /* pgup */`	328	`} else if (k == 0x149) { /* pgup */`
306	`// TODO`	329	`// TODO`
307		330
308	`} else if (k == 0x151) { /* pgdown */`	331	`} else if (k == 0x151) { /* pgdown */`
309	`// TODO`	332	`// TODO`
310		333
311	`} else if (k == 0x147) { /* home */`	334	`} else if (k == 0x147) { /* home */`
312	`cursor_home(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`	335	`cursor_home(&db, &cursorposx, &uidirtyfrom, &uidirtyto);`
313		336
314	`} else if (k == 0x14F) { /* end */`	337	`} else if (k == 0x14F) { /* end */`
315	`cursor_eol(&db, &cursorposx, screenw, &uidirtyfrom, &uidirtyto);`	338	`cursor_eol(&db, &cursorposx, screenw, &uidirtyfrom, &uidirtyto);`
316		339
317	`} else if (k == 0x1B) { /* ESC */`	340	`} else if (k == 0x1B) { /* ESC */`
318	`break;`	341	`break;`
319		342
320	`} else { /* UNHANDLED KEY - TODO IGNORE THIS IN PRODUCTION RELEASE */`	343	`} else { /* UNHANDLED KEY - TODO IGNORE THIS IN PRODUCTION RELEASE */`
321	`char buff[4];`	344	`char buff[4];`
322	`const char *HEX = "0123456789ABCDEF";`	345	`const char *HEX = "0123456789ABCDEF";`
323	`buff[0] = HEX[(k >> 8) & 15];`	346	`buff[0] = HEX[(k >> 8) & 15];`
324	`buff[1] = HEX[(k >> 4) & 15];`	347	`buff[1] = HEX[(k >> 4) & 15];`
325	`buff[2] = HEX[k & 15];`	348	`buff[2] = HEX[k & 15];`
326	`mdr_cout_str(screenh - 1, 0, "UNHANDLED KEY: 0x", scheme[COL_STATUSBAR1], 17);`	349	`mdr_cout_str(screenh - 1, 0, "UNHANDLED KEY: 0x", scheme[COL_STATUSBAR1], 17);`
327	`mdr_cout_str(screenh - 1, 17, buff, scheme[COL_STATUSBAR1], 3);`	350	`mdr_cout_str(screenh - 1, 17, buff, scheme[COL_STATUSBAR1], 3);`
328	`keyb_getkey();`	351	`keyb_getkey();`
329	`break;`	352	`break;`
330	`}`	353	`}`
331	`}`	354	`}`
332		355
333	`mdr_cout_close();`	356	`mdr_cout_close();`
334		357
335	`/* TODO free memory */`	358	`/* TODO free memory */`
336		359
337	`return(0);`	360	`return(0);`
338	`}`	361	`}`
339		362

Subversion Repositories SvarDOS

(root)/sved/trunk/sved.c @ 1323 – Rev 1282 → 1283