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Rev 1275 Rev 1276
Line 135... Line 135...
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}
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}
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static void cursor_eol(struct linedb *db, unsigned char *cursorposx, unsigned char screenw) {
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static void cursor_eol(struct linedb *db, unsigned char *cursorposx, unsigned char screenw) {
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  /* adjust xoffset to make sure eol is visible on screen */
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  /* adjust xoffset to make sure eol is visible on screen */
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  if (db->xoffset >= db->cursor->len) db->xoffset = db->cursor->len - 1;
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  if (db->xoffset > db->cursor->len) db->xoffset = db->cursor->len - 1;
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  if (db->xoffset + screenw - 1 <= db->cursor->len) db->xoffset = db->cursor->len - screenw + 2;
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  if (db->xoffset + screenw - 1 <= db->cursor->len) db->xoffset = db->cursor->len - screenw + 2;
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  *cursorposx = db->cursor->len - db->xoffset;
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  *cursorposx = db->cursor->len - db->xoffset;
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}
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}
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static void cursor_down(struct linedb *db, unsigned char *cursorposy, unsigned char screenh) {
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  if (db->cursor->next != NULL) {
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    db->cursor = db->cursor->next;
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    if (*cursorposy < screenh - 2) {
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      *cursorposy += 1;
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    } else {
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      db->topscreen = db->topscreen->next;
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    }
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  }
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}
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static void cursor_home(struct linedb *db, unsigned char *cursorposx) {
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  *cursorposx = 0;
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  db->xoffset = 0;
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}
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int main(int argc, char **argv) {
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int main(int argc, char **argv) {
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  FILE *fd;
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  FILE *fd;
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  const char *fname = NULL;
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  const char *fname = NULL;
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  char buff[1024];
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  char buff[1024];
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  struct linedb db;
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  struct linedb db;
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    ui_refresh(&db, screenw, screenh);
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    ui_refresh(&db, screenw, screenh);
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    k = keyb_getkey();
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    k = keyb_getkey();
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    if (k == 0x150) { /* down */
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    if (k == 0x150) { /* down */
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      if (db.cursor->next != NULL) {
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        db.cursor = db.cursor->next;
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        if (cursorposy < screenh - 2) {
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      cursor_down(&db, &cursorposy, screenh);
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          cursorposy++;
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        } else {
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          db.topscreen = db.topscreen->next;
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        }
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      }
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    } else if (k == 0x148) { /* up */
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    } else if (k == 0x148) { /* up */
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      cursor_up(&db, &cursorposy);
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      cursor_up(&db, &cursorposy);
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    } else if (k == 0x14D) { /* right */
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    } else if (k == 0x14D) { /* right */
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        if (cursorposx < screenw - 2) {
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        if (cursorposx < screenw - 2) {
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          cursorposx++;
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          cursorposx++;
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        } else {
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        } else {
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          db.xoffset++;
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          db.xoffset++;
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        }
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        }
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      } else {
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        cursor_down(&db, &cursorposy, screenh);
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        cursor_home(&db, &cursorposx);
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      }
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      }
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    } else if (k == 0x14B) { /* left */
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    } else if (k == 0x14B) { /* left */
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      if (cursorposx > 0) {
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      if (cursorposx > 0) {
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        cursorposx--;
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        cursorposx--;
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      } else if (db.xoffset > 0) {
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      } else if (db.xoffset > 0) {
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        db.xoffset--;
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        db.xoffset--;
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      } else {
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      } else if (db.cursor->prev != NULL) { /* jump to end of line above */
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        cursor_up(&db, &cursorposy);
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        cursor_up(&db, &cursorposy);
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        cursor_eol(&db, &cursorposx, screenw);
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        cursor_eol(&db, &cursorposx, screenw);
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      }
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      }
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    } else if (k == 0x1B) { /* ESC */
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    } else if (k == 0x1B) { /* ESC */