/*
 *  textbox.c -- implements the text box
 *
 *  AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License
 *  as published by the Free Software Foundation; either version 2
 *  of the License, or (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include "dialog.h"

static void back_lines(int n);
static void print_page(WINDOW * win, int height, int width);
static void print_line(WINDOW * win, int row, int width);
static char *get_line(void);
static int get_search_term(WINDOW * win, char *search_term,
			   int height, int width);
static void print_position(WINDOW * win, int height, int width);

static int hscroll = 0, fd, file_size, bytes_read;
static int begin_reached = 1, end_reached = 0, page_length;
static char *buf, *page;

static void cancelled(GtkWidget *w, gpointer *d)
{
	exit(-1);
}

static void okayed(GtkWidget *w, int button, gpointer *d)
{
	exit(0);
}

/*
 * Display text from a file in a dialog box.
 */
int dialog_textbox(const char *title, const char *file, int height, int width)
{
	int i, x, y, cur_x, cur_y, fpos, key = 0, dir, temp, temp1;
#ifdef USE_NCURSES
	int passed_end;
#endif
	char search_term[MAX_LEN + 1], *tempptr, *found;
	WINDOW *dialog, *text;

	if (gnome_mode) {
		GtkWidget *w;
		GtkWidget *hbox;
		GtkWidget *vbox;
		
		GtkWidget *scroller;
		GtkWidget *text;
		GtkWidget *tbox;
		char buf[512];

		FILE *fp=fopen(file, "r");
		
		if(fp==NULL)
		{
			GtkWidget *w=gnome_message_box_new("Unable to open file",
						GNOME_MESSAGE_BOX_ERROR,
						GNOME_STOCK_BUTTON_OK,
						NULL);
			gtk_widget_show(w);
			return 0;
		}

		w = gnome_dialog_new(title,
				     GNOME_STOCK_BUTTON_OK, NULL);
		
		gnome_dialog_set_close(GNOME_DIALOG(w), TRUE);
		gtk_window_set_title(GTK_WINDOW(w), title);

		hbox = gtk_hbox_new(FALSE, 0);
		vbox = gtk_vbox_new(FALSE, 0);

		tbox=gtk_hbox_new(FALSE, 0);
		
		text=gtk_text_new(NULL, NULL);
		
		gtk_box_pack_start(GTK_BOX(tbox), text, FALSE, FALSE, 0);
		
		scroller=gtk_vscrollbar_new(GTK_TEXT(text)->vadj);
		gtk_box_pack_start(GTK_BOX(tbox), scroller, FALSE, FALSE, 0);
		
		gtk_widget_show_all(tbox);

		
		
		gtk_box_pack_start(GTK_BOX(vbox), tbox, TRUE, TRUE, 0);
		gtk_widget_show(vbox);
		
		gtk_box_pack_start(GTK_BOX(hbox), vbox, TRUE, TRUE, 0);
		gtk_widget_show(hbox);

		gtk_box_pack_start(GTK_BOX(GNOME_DIALOG(w)->vbox),
				   hbox,
				   TRUE, TRUE, GNOME_PAD);
		gtk_window_set_position(GTK_WINDOW(w), GTK_WIN_POS_CENTER);
		
		gtk_widget_realize(text);
		gtk_widget_set_usize(text, 8*width, 7*height);

		while(fgets(buf, 511, fp)!=NULL)
		{
			gtk_text_set_point(GTK_TEXT(text), gtk_text_get_length(GTK_TEXT(text)));
			gtk_text_insert(GTK_TEXT(text), NULL, NULL, NULL, buf, strlen(buf));
		}
		fclose(fp);
		gtk_editable_set_position(GTK_EDITABLE(text), 0);
		gtk_signal_connect(GTK_OBJECT(w), "destroy",
			GTK_SIGNAL_FUNC(cancelled), NULL);
		gtk_signal_connect(GTK_OBJECT(w), "clicked",
			GTK_SIGNAL_FUNC(okayed), NULL);
		gtk_widget_show(w);
		gtk_widget_grab_focus (text);
		gtk_main();
		return 0;
	}
	search_term[0] = '\0';	/* no search term entered yet */

	/* Open input file for reading */
	if ((fd = open(file, O_RDONLY)) == -1) {
		if(!gnome_mode) endwin();
		fprintf(stderr,
			"\nCan't open input file in dialog_textbox().\n");
		exit(-1);
	}
	/* Get file size. Actually, 'file_size' is the real file size - 1,
	   since it's only the last byte offset from the beginning */
	if ((file_size = lseek(fd, 0, SEEK_END)) == -1) {
		if(!gnome_mode) endwin();
		fprintf(stderr, "\nError getting file size in dialog_textbox().\n");
		exit(-1);
	}
	/* Restore file pointer to beginning of file after getting file size */
	if (lseek(fd, 0, SEEK_SET) == -1) {
		if(!gnome_mode) endwin();
		fprintf(stderr, "\nError moving file pointer in dialog_textbox().\n");
		exit(-1);
	}
	/* Allocate space for read buffer */
	if ((buf = malloc(BUF_SIZE + 1)) == NULL) {
		if(!gnome_mode) endwin();
		fprintf(stderr, "\nCan't allocate memory in dialog_textbox().\n");
		exit(-1);
	}
	if ((bytes_read = read(fd, buf, BUF_SIZE)) == -1) {
		if(!gnome_mode) endwin();
		fprintf(stderr, "\nError reading file in dialog_textbox().\n");
		exit(-1);
	}
	buf[bytes_read] = '\0';	/* mark end of valid data */
	page = buf;		/* page is pointer to start of page to be displayed */

	/* center dialog box on screen */
	x = (COLS - width) / 2;
	y = (LINES - height) / 2;

#ifndef NO_COLOR_CURSES
	if (use_shadow)
		draw_shadow(stdscr, y, x, height, width);
#endif
	dialog = newwin(height, width, y, x);
#ifdef WITH_GPM
	mouse_setbase(x, y);
#endif
	keypad(dialog, TRUE);

	/* Create window for text region, used for scrolling text */
	text = subwin(dialog, height - 4, width - 2, y + 1, x + 1);

	keypad(text, TRUE);

	/* register the new window, along with its borders */
#ifdef WITH_GPM
	mouse_mkbigregion(0, 0, height - 2, width, 1, 0, 2 /* not normal */ );
#endif
	draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);

	wattrset(dialog, border_attr);
	wmove(dialog, height - 3, 0);
	waddch(dialog, ACS_LTEE);
	for (i = 0; i < width - 2; i++)
		waddch(dialog, ACS_HLINE);
	wattrset(dialog, dialog_attr);
	waddch(dialog, ACS_RTEE);
	wmove(dialog, height - 2, 1);
	for (i = 0; i < width - 2; i++)
		waddch(dialog, ' ');

	if (title != NULL) {
		wattrset(dialog, title_attr);
		wmove(dialog, 0, (width - strlen(title)) / 2 - 1);
		waddch(dialog, ' ');
		waddstr(dialog, title);
		waddch(dialog, ' ');
	}
	print_button(dialog, " EXIT ", height - 2, width / 2 - 4, TRUE);
	wnoutrefresh(dialog);
	getyx(dialog, cur_y, cur_x);	/* Save cursor position */

	/* Print first page of text */
	attr_clear(text, height - 4, width - 2, dialog_attr);
	print_page(text, height - 4, width - 2);
	print_position(dialog, height, width);
	wmove(dialog, cur_y, cur_x);	/* Restore cursor position */
	wrefresh(dialog);

	while ((key != ESC) && (key != '\n')) {
		key = mouse_wgetch(dialog);
		switch (key) {
		case M_EVENT + 'E':
		case 'E':	/* Exit */
		case 'e':
			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) {
					if(!gnome_mode) 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) {
						if(!gnome_mode) endwin();
						fprintf(stderr, "\nError moving file pointer in "
						  "dialog_textbox().\n");
						exit(-1);
					}
					if ((bytes_read = read(fd, buf, BUF_SIZE)) == -1) {
						if(!gnome_mode) 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 */
#ifdef USE_NCURSES
		case KEY_END:
#endif
			end_reached = 1;
			/* Last page not in buffer? */
			if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) {
				if(!gnome_mode) 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) {
					if(!gnome_mode) endwin();
					fprintf(stderr,
						"\nError moving file pointer in dialog_textbox().\n");
					exit(-1);
				}
				if ((bytes_read = read(fd, buf, BUF_SIZE)) == -1) {
					if(!gnome_mode) 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);
#ifdef USE_NCURSES
				/* 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;
				}
#else
				print_page(text, height - 4, width - 2);
#endif
				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);
#ifdef USE_NCURSES
				wmove(text, height - 5, 0);
				waddch(text, ' ');
				wmove(text, height - 5, width - 3);
				waddch(text, ' ');
#endif
				wnoutrefresh(text);
				print_position(dialog, height, width);
				wmove(dialog, cur_y, cur_x);	/* Restore cursor position */
				wrefresh(dialog);
			}
			break;
		case ' ':	/* Next page */
		case KEY_NPAGE:
			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 '/':	/* Forward search */
		case 'n':	/* Repeat forward search */
		case '?':	/* Backward search */
		case 'N':	/* Repeat backward search */
			/* set search direction */
			dir = (key == '/' || key == 'n') ? 1 : 0;
			if (dir ? !end_reached : !begin_reached) {
				if (key == 'n' || key == 'N') {
					if (search_term[0] == '\0') {	/* No search term yet */
						fprintf(stderr, "\a");	/* beep */
						break;
					}
				} else
					/* Get search term from user */
					if (get_search_term(text, search_term, height - 4,
						      width - 2) == -1) {
					/* ESC pressed in get_search_term().
					   Reprint page to clear box */
					wattrset(text, dialog_attr);
					back_lines(page_length);
					print_page(text, height - 4, width - 2);
					wmove(dialog, cur_y, cur_x);
					wrefresh(dialog);
					break;
				}
				/* Save variables for restoring in case search term
				   can't be found */
				tempptr = page;
				temp = begin_reached;
				temp1 = end_reached;
				if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) {
					if(!gnome_mode) endwin();
					fprintf(stderr, "\nError moving file pointer in "
						"dialog_textbox().\n");
					exit(-1);
				}
				fpos -= bytes_read;
				/* update 'page' to point to next (previous) line before
				   forward (backward) searching */
				back_lines(dir ? page_length - 1 : page_length + 1);
				found = NULL;
				if (dir)	/* Forward search */
					while ((found = strstr(get_line(), search_term))
					       == NULL) {
						if (end_reached)
							break;
				} else	/* Backward search */
					while ((found = strstr(get_line(), search_term))
					       == NULL) {
						if (begin_reached)
							break;
						back_lines(2);
					}
				if (found == NULL) {	/* not found */
					fprintf(stderr, "\a");	/* beep */
					/* Restore program state to that before searching */
					if (lseek(fd, fpos, SEEK_SET) == -1) {
						if(!gnome_mode) endwin();
						fprintf(stderr, "\nError moving file pointer in "
						  "dialog_textbox().\n");
						exit(-1);
					}
					if ((bytes_read = read(fd, buf, BUF_SIZE)) == -1) {
						if(!gnome_mode) endwin();
						fprintf(stderr, "\nError reading file in "
						  "dialog_textbox().\n");
						exit(-1);
					}
					buf[bytes_read] = '\0';
					page = tempptr;
					begin_reached = temp;
					end_reached = temp1;
					/* move 'page' to point to start of current page in order to
					   re-print current page. Note that 'page' always points to
					   start of next page, so this is necessary */
					back_lines(page_length);
				} else	/* Search term found */
					back_lines(1);
				/* Reprint page */
				wattrset(text, dialog_attr);
				print_page(text, height - 4, width - 2);
				if (found != NULL)
					print_position(dialog, height, width);
				wmove(dialog, cur_y, cur_x);	/* Restore cursor position */
				wrefresh(dialog);
			} else	/* no need to find */
				fprintf(stderr, "\a");	/* beep */
			break;
		case ESC:
			break;
		}
	}

	delwin(dialog);
	free(buf);
	close(fd);
	return -1;		/* ESC pressed */
}

/*
 * Go back 'n' lines in text file. Called by dialog_textbox().
 * 'page' will be updated to point to the desired line in 'buf'.
 */
static void back_lines(int n)
{
	int i, fpos;

	begin_reached = 0;
	/* We have to distinguish between end_reached and !end_reached
	   since at end of file, the line is not ended by a '\n'.
	   The code inside 'if' basically does a '--page' to move one
	   character backward so as to skip '\n' of the previous line */
	if (!end_reached) {
		/* Either beginning of buffer or beginning of file reached? */
		if (page == buf) {
			if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) {
				if(!gnome_mode) endwin();
				fprintf(stderr, "\nError moving file pointer in "
					"back_lines().\n");
				exit(-1);
			}
			if (fpos > bytes_read) {	/* Not beginning of file yet */
				/* We've reached beginning of buffer, but not beginning of
				   file yet, so read previous part of file into buffer.
				   Note that we only move backward for BUF_SIZE/2 bytes,
				   but not BUF_SIZE bytes to avoid re-reading again in
				   print_page() later */
				/* Really possible to move backward BUF_SIZE/2 bytes? */
				if (fpos < BUF_SIZE / 2 + bytes_read) {
					/* No, move less then */
					if (lseek(fd, 0, SEEK_SET) == -1) {
						if(!gnome_mode) endwin();
						fprintf(stderr, "\nError moving file pointer in "
						      "back_lines().\n");
						exit(-1);
					}
					page = buf + fpos - bytes_read;
				} else {	/* Move backward BUF_SIZE/2 bytes */
					if (lseek(fd, -(BUF_SIZE / 2 + bytes_read), SEEK_CUR)
					    == -1) {
						if(!gnome_mode) endwin();
						fprintf(stderr, "\nError moving file pointer "
						   "in back_lines().\n");
						exit(-1);
					}
					page = buf + BUF_SIZE / 2;
				}
				if ((bytes_read = read(fd, buf, BUF_SIZE)) == -1) {
					if(!gnome_mode) endwin();
					fprintf(stderr, "\nError reading file in back_lines().\n");
					exit(-1);
				}
				buf[bytes_read] = '\0';
			} else {	/* Beginning of file reached */
				begin_reached = 1;
				return;
			}
		}
		if (*(--page) != '\n') {	/* '--page' here */
			/* Something's wrong... */
			if(!gnome_mode) endwin();
			fprintf(stderr, "\nInternal error in back_lines().\n");
			exit(-1);
		}
	}
	/* Go back 'n' lines */
	for (i = 0; i < n; i++)
		do {
			if (page == buf) {
				if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) {
					if(!gnome_mode) endwin();
					fprintf(stderr,
						"\nError moving file pointer in back_lines().\n");
					exit(-1);
				}
				if (fpos > bytes_read) {
					/* Really possible to move backward BUF_SIZE/2 bytes? */
					if (fpos < BUF_SIZE / 2 + bytes_read) {
						/* No, move less then */
						if (lseek(fd, 0, SEEK_SET) == -1) {
							if(!gnome_mode) endwin();
							fprintf(stderr, "\nError moving file pointer "
								"in back_lines().\n");
							exit(-1);
						}
						page = buf + fpos - bytes_read;
					} else {	/* Move backward BUF_SIZE/2 bytes */
						if (lseek(fd, -(BUF_SIZE / 2 + bytes_read),
						       SEEK_CUR) == -1) {
							if(!gnome_mode) endwin();
							fprintf(stderr, "\nError moving file pointer"
								" in back_lines().\n");
							exit(-1);
						}
						page = buf + BUF_SIZE / 2;
					}
					if ((bytes_read = read(fd, buf, BUF_SIZE)) == -1) {
						if(!gnome_mode) endwin();
						fprintf(stderr, "\nError reading file in "
						      "back_lines().\n");
						exit(-1);
					}
					buf[bytes_read] = '\0';
				} else {	/* Beginning of file reached */
					begin_reached = 1;
					return;
				}
			}
		} while (*(--page) != '\n');
	page++;
}

/*
 * Print a new page of text. Called by dialog_textbox().
 */
static void print_page(WINDOW * win, int height, int width)
{
	int i, passed_end = 0;

	page_length = 0;
	for (i = 0; i < height; i++) {
		print_line(win, i, width);
		if (!passed_end)
			page_length++;
		if (end_reached && !passed_end)
			passed_end = 1;
	}
	wnoutrefresh(win);
}

/*
 * Print a new line of text. Called by dialog_textbox() and print_page().
 */
static void print_line(WINDOW * win, int row, int width)
{
	int i, y, x;
	char *line;

	line = get_line();
	line += MIN(strlen(line), hscroll);	/* Scroll horizontally */
	wmove(win, row, 0);	/* move cursor to correct line */
	waddch(win, ' ');
#ifdef USE_NCURSES
	waddnstr(win, line, MIN(strlen(line), width - 2));
#else
	line[MIN(strlen(line), width - 2)] = '\0';
	waddstr(win, line);
#endif

	getyx(win, y, x);
	/* Clear 'residue' of previous line */
	for (i = 0; i < width - x; i++)
		waddch(win, ' ');
}

/*
 * Return current line of text. Called by dialog_textbox() and print_line().
 * 'page' should point to start of current line before calling, and will be
 * updated to point to start of next line.
 */
static char *
 get_line(void)
{
	int i = 0, fpos;
	static char line[MAX_LEN + 1];

	end_reached = 0;
	while (*page != '\n') {
		if (*page == '\0') {
			/* Either end of file or end of buffer reached */
			if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) {
				if(!gnome_mode) endwin();
				fprintf(stderr, "\nError moving file pointer in "
					"get_line().\n");
				exit(-1);
			}
			if (fpos < file_size) {		/* Not end of file yet */
				/* We've reached end of buffer, but not end of file yet,
				   so read next part of file into buffer */
				if ((bytes_read = read(fd, buf, BUF_SIZE)) == -1) {
					if(!gnome_mode) endwin();
					fprintf(stderr, "\nError reading file in get_line().\n");
					exit(-1);
				}
				buf[bytes_read] = '\0';
				page = buf;
			} else {
				if (!end_reached)
					end_reached = 1;
				break;
			}
		} else if (i < MAX_LEN)
			line[i++] = *(page++);
		else {
			/* Truncate lines longer than MAX_LEN characters */
			if (i == MAX_LEN)
				line[i++] = '\0';
			page++;
		}
	}
	if (i <= MAX_LEN)
		line[i] = '\0';
	if (!end_reached)
		page++;		/* move pass '\n' */

	return line;
}

/*
 * Display a dialog box and get the search term from user
 */
static int get_search_term(WINDOW * win, char *search_term, int height, int width)
{
	int i, x, y, input_x = 0, scroll = 0, key = 0;
	int box_height = 3, box_width = 30;

	x = (width - box_width) / 2;
	y = (height - box_height) / 2;
#ifndef NO_COLOR_CURSES
	if (use_shadow)
		draw_shadow(win, y, x, box_height, box_width);
#endif
	draw_box(win, y, x, box_height, box_width, dialog_attr,
		 searchbox_border_attr);
	wattrset(win, searchbox_title_attr);
	wmove(win, y, x + box_width / 2 - 4);
	waddstr(win, " Search ");

	box_width -= 2;
	wmove(win, y + 1, x + 1);
	wrefresh(win);
	search_term[0] = '\0';
	wattrset(win, searchbox_attr);
	while (key != ESC) {
		key = wgetch(win);
		switch (key) {
		case '\n':
			if (search_term[0] != '\0')
				return 0;
			break;
		case KEY_BACKSPACE:
		case 127:
			if (input_x || scroll) {
				if (!input_x) {
					scroll = scroll < box_width - 1 ?
					    0 : scroll - (box_width - 1);
					wmove(win, y + 1, x + 1);
					for (i = 0; i < box_width; i++)
						waddch(win, search_term[scroll + input_x + i] ?
						       search_term[scroll + input_x + i] : ' ');
					input_x = strlen(search_term) - scroll;
				} else
					input_x--;
				search_term[scroll + input_x] = '\0';
				wmove(win, y + 1, input_x + x + 1);
				waddch(win, ' ');
				wmove(win, y + 1, input_x + x + 1);
				wrefresh(win);
			}
			break;
		case ESC:
			break;
		default:
			if (isprint(key))
				if (scroll + input_x < MAX_LEN) {
					search_term[scroll + input_x] = key;
					search_term[scroll + input_x + 1] = '\0';
					if (input_x == box_width - 1) {
						scroll++;
						wmove(win, y + 1, x + 1);
						for (i = 0; i < box_width - 1; i++)
							waddch(win, search_term[scroll + i]);
					} else {
						wmove(win, y + 1, input_x++ + x + 1);
						waddch(win, key);
					}
					wrefresh(win);
				}
		}
	}

	return -1;		/* ESC pressed */
}

/*
 * Print current position
 */
static void print_position(WINDOW * win, int height, int width)
{
	int fpos, percent;

	if ((fpos = lseek(fd, 0, SEEK_CUR)) == -1) {
		if(!gnome_mode) endwin();
		fprintf(stderr, "\nError moving file pointer in print_position().\n");
		exit(-1);
	}
	wattrset(win, position_indicator_attr);
	percent = !file_size ?
	    100 : ((fpos - bytes_read + page - buf) * 100) / file_size;
	wmove(win, height - 3, width - 9);
	wprintw(win, "(%3d%%)", percent);
}