- key = wgetch (dialog);
- switch (key) {
- case 'E': /* Exit */
- case 'e':
- case 'X':
- case 'x':
- delwin (dialog);
- free (buf);
- close (fd);
- return 0;
- case 'g': /* First page */
- case KEY_HOME:
- if (!begin_reached) {
- begin_reached = 1;
- /* First page not in buffer? */
- if ((fpos = lseek (fd, 0, SEEK_CUR)) == -1) {
- endwin ();
- fprintf (stderr,
- "\nError moving file pointer in dialog_textbox().\n");
- exit (-1);
- }
- if (fpos > bytes_read) { /* Yes, we have to read it in */
- if (lseek (fd, 0, SEEK_SET) == -1) {
- endwin ();
- fprintf (stderr, "\nError moving file pointer in "
- "dialog_textbox().\n");
- exit (-1);
- }
- if ((bytes_read = read (fd, buf, BUF_SIZE)) == -1) {
- endwin ();
- fprintf (stderr,
- "\nError reading file in dialog_textbox().\n");
- exit (-1);
- }
- buf[bytes_read] = '\0';
- }
- page = buf;
- print_page (text, height - 4, width - 2);
- print_position (dialog, height, width);
- wmove (dialog, cur_y, cur_x); /* Restore cursor position */
- wrefresh (dialog);
- }
- break;
- case 'G': /* Last page */
- case KEY_END:
-
- end_reached = 1;
- /* Last page not in buffer? */
- if ((fpos = lseek (fd, 0, SEEK_CUR)) == -1) {
- endwin ();
- fprintf (stderr,
- "\nError moving file pointer in dialog_textbox().\n");
- exit (-1);
- }
- if (fpos < file_size) { /* Yes, we have to read it in */
- if (lseek (fd, -BUF_SIZE, SEEK_END) == -1) {
- endwin ();
- fprintf (stderr,
- "\nError moving file pointer in dialog_textbox().\n");
- exit (-1);
- }
- if ((bytes_read = read (fd, buf, BUF_SIZE)) == -1) {
- endwin ();
- fprintf (stderr,
- "\nError reading file in dialog_textbox().\n");
- exit (-1);
- }
- buf[bytes_read] = '\0';
- }
- page = buf + bytes_read;
- back_lines (height - 4);
- print_page (text, height - 4, width - 2);
- print_position (dialog, height, width);
- wmove (dialog, cur_y, cur_x); /* Restore cursor position */
- wrefresh (dialog);
- break;
- case 'K': /* Previous line */
- case 'k':
- case KEY_UP:
- if (!begin_reached) {
- back_lines (page_length + 1);
-
- /* We don't call print_page() here but use scrolling to ensure
- faster screen update. However, 'end_reached' and
- 'page_length' should still be updated, and 'page' should
- point to start of next page. This is done by calling
- get_line() in the following 'for' loop. */
- scrollok (text, TRUE);
- wscrl (text, -1); /* Scroll text region down one line */
- scrollok (text, FALSE);
- page_length = 0;
- passed_end = 0;
- for (i = 0; i < height - 4; i++) {
- if (!i) {
- /* print first line of page */
- print_line (text, 0, width - 2);
- wnoutrefresh (text);
- } else
- /* Called to update 'end_reached' and 'page' */
- get_line ();
- if (!passed_end)
- page_length++;
- if (end_reached && !passed_end)
- passed_end = 1;
- }
-
- print_position (dialog, height, width);
- wmove (dialog, cur_y, cur_x); /* Restore cursor position */
- wrefresh (dialog);
- }
- break;
- case 'B': /* Previous page */
- case 'b':
- case KEY_PPAGE:
- if (begin_reached)
- break;
- back_lines (page_length + height - 4);
- print_page (text, height - 4, width - 2);
- print_position (dialog, height, width);
- wmove (dialog, cur_y, cur_x);
- wrefresh (dialog);
- break;
- case 'J': /* Next line */
- case 'j':
- case KEY_DOWN:
- if (!end_reached) {
- begin_reached = 0;
- scrollok (text, TRUE);
- scroll (text); /* Scroll text region up one line */
- scrollok (text, FALSE);
- print_line (text, height - 5, width - 2);
- wnoutrefresh (text);
- print_position (dialog, height, width);
- wmove (dialog, cur_y, cur_x); /* Restore cursor position */
- wrefresh (dialog);
- }
- break;
- case KEY_NPAGE: /* Next page */
- case ' ':
- if (end_reached)
- break;
-
- begin_reached = 0;
- print_page (text, height - 4, width - 2);
- print_position (dialog, height, width);
- wmove (dialog, cur_y, cur_x);
- wrefresh (dialog);
- break;
- case '0': /* Beginning of line */
- case 'H': /* Scroll left */
- case 'h':
- case KEY_LEFT:
- if (hscroll <= 0)
- break;
-
- if (key == '0')
- hscroll = 0;
- else
- hscroll--;
- /* Reprint current page to scroll horizontally */
- back_lines (page_length);
- print_page (text, height - 4, width - 2);
- wmove (dialog, cur_y, cur_x);
- wrefresh (dialog);
- break;
- case 'L': /* Scroll right */
- case 'l':
- case KEY_RIGHT:
- if (hscroll >= MAX_LEN)
- break;
- hscroll++;
- /* Reprint current page to scroll horizontally */
- back_lines (page_length);
- print_page (text, height - 4, width - 2);
- wmove (dialog, cur_y, cur_x);
- wrefresh (dialog);
- break;
- case ESC:
- break;
- }
+ key = wgetch (dialog);
+ switch (key) {
+ case 'E': /* Exit */
+ case 'e':
+ case 'X':
+ case 'x':
+ delwin (dialog);
+ free (buf);
+ close (fd);
+ return 0;
+ case 'g': /* First page */
+ case KEY_HOME:
+ if (!begin_reached) {
+ begin_reached = 1;
+ /* First page not in buffer? */
+ if ((fpos = lseek (fd, 0, SEEK_CUR)) == -1) {
+ endwin ();
+ fprintf (stderr,
+ "\nError moving file pointer in dialog_textbox().\n");
+ exit (-1);
+ }
+ if (fpos > bytes_read) { /* Yes, we have to read it in */
+ if (lseek (fd, 0, SEEK_SET) == -1) {
+ endwin ();
+ fprintf (stderr, "\nError moving file pointer in "
+ "dialog_textbox().\n");
+ exit (-1);
+ }
+ if ((bytes_read = read (fd, buf, BUF_SIZE)) == -1) {
+ endwin ();
+ fprintf (stderr,
+ "\nError reading file in dialog_textbox().\n");
+ exit (-1);
+ }
+ buf[bytes_read] = '\0';
+ }
+ page = buf;
+ print_page (text, height - 4, width - 2);
+ print_position (dialog, height, width);
+ wmove (dialog, cur_y, cur_x); /* Restore cursor position */
+ wrefresh (dialog);
+ }
+ break;
+ case 'G': /* Last page */
+ case KEY_END:
+
+ end_reached = 1;
+ /* Last page not in buffer? */
+ if ((fpos = lseek (fd, 0, SEEK_CUR)) == -1) {
+ endwin ();
+ fprintf (stderr,
+ "\nError moving file pointer in dialog_textbox().\n");
+ exit (-1);
+ }
+ if (fpos < file_size) { /* Yes, we have to read it in */
+ if (lseek (fd, -BUF_SIZE, SEEK_END) == -1) {
+ endwin ();
+ fprintf (stderr,
+ "\nError moving file pointer in dialog_textbox().\n");
+ exit (-1);
+ }
+ if ((bytes_read = read (fd, buf, BUF_SIZE)) == -1) {
+ endwin ();
+ fprintf (stderr,
+ "\nError reading file in dialog_textbox().\n");
+ exit (-1);
+ }
+ buf[bytes_read] = '\0';
+ }
+ page = buf + bytes_read;
+ back_lines (height - 4);
+ print_page (text, height - 4, width - 2);
+ print_position (dialog, height, width);
+ wmove (dialog, cur_y, cur_x); /* Restore cursor position */
+ wrefresh (dialog);
+ break;
+ case 'K': /* Previous line */
+ case 'k':
+ case KEY_UP:
+ if (!begin_reached) {
+ back_lines (page_length + 1);
+
+ /* We don't call print_page() here but use scrolling to ensure
+ faster screen update. However, 'end_reached' and
+ 'page_length' should still be updated, and 'page' should
+ point to start of next page. This is done by calling
+ get_line() in the following 'for' loop. */
+ scrollok (text, TRUE);
+ wscrl (text, -1); /* Scroll text region down one line */
+ scrollok (text, FALSE);
+ page_length = 0;
+ passed_end = 0;
+ for (i = 0; i < height - 4; i++) {
+ if (!i) {
+ /* print first line of page */
+ print_line (text, 0, width - 2);
+ wnoutrefresh (text);
+ } else
+ /* Called to update 'end_reached' and 'page' */
+ get_line ();
+ if (!passed_end)
+ page_length++;
+ if (end_reached && !passed_end)
+ passed_end = 1;
+ }
+
+ print_position (dialog, height, width);
+ wmove (dialog, cur_y, cur_x); /* Restore cursor position */
+ wrefresh (dialog);
+ }
+ break;
+ case 'B': /* Previous page */
+ case 'b':
+ case KEY_PPAGE:
+ if (begin_reached)
+ break;
+ back_lines (page_length + height - 4);
+ print_page (text, height - 4, width - 2);
+ print_position (dialog, height, width);
+ wmove (dialog, cur_y, cur_x);
+ wrefresh (dialog);
+ break;
+ case 'J': /* Next line */
+ case 'j':
+ case KEY_DOWN:
+ if (!end_reached) {
+ begin_reached = 0;
+ scrollok (text, TRUE);
+ scroll (text); /* Scroll text region up one line */
+ scrollok (text, FALSE);
+ print_line (text, height - 5, width - 2);
+ wnoutrefresh (text);
+ print_position (dialog, height, width);
+ wmove (dialog, cur_y, cur_x); /* Restore cursor position */
+ wrefresh (dialog);
+ }
+ break;
+ case KEY_NPAGE: /* Next page */
+ case ' ':
+ if (end_reached)
+ break;
+
+ begin_reached = 0;
+ print_page (text, height - 4, width - 2);
+ print_position (dialog, height, width);
+ wmove (dialog, cur_y, cur_x);
+ wrefresh (dialog);
+ break;
+ case '0': /* Beginning of line */
+ case 'H': /* Scroll left */
+ case 'h':
+ case KEY_LEFT:
+ if (hscroll <= 0)
+ break;
+
+ if (key == '0')
+ hscroll = 0;
+ else
+ hscroll--;
+ /* Reprint current page to scroll horizontally */
+ back_lines (page_length);
+ print_page (text, height - 4, width - 2);
+ wmove (dialog, cur_y, cur_x);
+ wrefresh (dialog);
+ break;
+ case 'L': /* Scroll right */
+ case 'l':
+ case KEY_RIGHT:
+ if (hscroll >= MAX_LEN)
+ break;
+ hscroll++;
+ /* Reprint current page to scroll horizontally */
+ back_lines (page_length);
+ print_page (text, height - 4, width - 2);
+ wmove (dialog, cur_y, cur_x);
+ wrefresh (dialog);
+ break;
+ case ESC:
+ break;
+ }