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freebsd-skq/contrib/dialog/textbox.c
nwhitehorn 7c690c1aa8 Update dialog to 1.1-20110707.
2011-07-14 14:01:36 +00:00

949 lines
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/*
* $Id: textbox.c,v 1.101 2011/06/29 09:53:03 tom Exp $
*
* textbox.c -- implements the text box
*
* Copyright 2000-2010,2011 Thomas E. Dickey
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License, version 2.1
* as published by the Free Software Foundation.
*
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to
* Free Software Foundation, Inc.
* 51 Franklin St., Fifth Floor
* Boston, MA 02110, USA.
*
* An earlier version of this program lists as authors:
* Savio Lam (lam836@cs.cuhk.hk)
*/
#include <dialog.h>
#include <dlg_keys.h>
#define PAGE_LENGTH (height - 4)
#define PAGE_WIDTH (width - 2)
typedef struct {
DIALOG_CALLBACK obj;
WINDOW *text;
const char **buttons;
int hscroll;
char line[MAX_LEN + 1];
int fd;
long file_size;
long fd_bytes_read;
long bytes_read;
long buffer_len;
bool begin_reached;
bool buffer_first;
bool end_reached;
long page_length; /* lines on the page which is shown */
long in_buf; /* ending index into buf[] for page */
char *buf;
} MY_OBJ;
static long
lseek_obj(MY_OBJ * obj, long offset, int mode)
{
long fpos;
if ((fpos = (long) lseek(obj->fd, (off_t) offset, mode)) == -1) {
switch (mode) {
case SEEK_CUR:
dlg_exiterr("Cannot get file position");
break;
case SEEK_END:
dlg_exiterr("Cannot seek to end of file");
break;
case SEEK_SET:
dlg_exiterr("Cannot set file position to %ld", offset);
break;
}
}
return fpos;
}
static long
ftell_obj(MY_OBJ * obj)
{
return lseek_obj(obj, 0L, SEEK_CUR);
}
static char *
xalloc(size_t size)
{
char *result = dlg_malloc(char, size);
assert_ptr(result, "xalloc");
return result;
}
/*
* read_high() substitutes read() for tab->spaces conversion
*
* buffer_len, fd_bytes_read, bytes_read are modified
* buf is allocated
*
* fd_bytes_read is the effective number of bytes read from file
* bytes_read is the length of buf, that can be different if tab_correct
*/
static void
read_high(MY_OBJ * obj, size_t size_read)
{
char *buftab, ch;
int i = 0, j, n, tmpint;
long begin_line;
/* Allocate space for read buffer */
buftab = xalloc(size_read + 1);
if ((obj->fd_bytes_read = read(obj->fd, buftab, size_read)) != -1) {
buftab[obj->fd_bytes_read] = '\0'; /* mark end of valid data */
if (dialog_vars.tab_correct) {
/* calculate bytes_read by buftab and fd_bytes_read */
obj->bytes_read = begin_line = 0;
for (j = 0; j < obj->fd_bytes_read; j++)
if (buftab[j] == TAB)
obj->bytes_read += dialog_state.tab_len
- ((obj->bytes_read - begin_line)
% dialog_state.tab_len);
else if (buftab[j] == '\n') {
obj->bytes_read++;
begin_line = obj->bytes_read;
} else
obj->bytes_read++;
if (obj->bytes_read > obj->buffer_len) {
if (obj->buffer_first)
obj->buffer_first = FALSE; /* disp = 0 */
else {
free(obj->buf);
}
obj->buffer_len = obj->bytes_read;
/* Allocate space for read buffer */
obj->buf = xalloc((size_t) obj->buffer_len + 1);
}
} else {
if (obj->buffer_first) {
obj->buffer_first = FALSE;
/* Allocate space for read buffer */
obj->buf = xalloc(size_read + 1);
}
obj->bytes_read = obj->fd_bytes_read;
}
j = 0;
begin_line = 0;
while (j < obj->fd_bytes_read)
if (((ch = buftab[j++]) == TAB) && (dialog_vars.tab_correct != 0)) {
tmpint = (dialog_state.tab_len
- ((int) ((long) i - begin_line) % dialog_state.tab_len));
for (n = 0; n < tmpint; n++)
obj->buf[i++] = ' ';
} else {
if (ch == '\n')
begin_line = i + 1;
obj->buf[i++] = ch;
}
obj->buf[i] = '\0'; /* mark end of valid data */
}
if (obj->bytes_read == -1)
dlg_exiterr("Error reading file");
free(buftab);
}
static long
find_first(MY_OBJ * obj, char *buffer, long length)
{
long recount = obj->page_length;
long result = 0;
while (length > 0) {
if (buffer[length] == '\n') {
if (--recount < 0) {
result = length;
break;
}
}
--length;
}
return result;
}
static long
tabize(MY_OBJ * obj, long val, long *first_pos)
{
long fpos;
long i, count, begin_line;
char *buftab;
if (!dialog_vars.tab_correct)
return val;
fpos = ftell_obj(obj);
lseek_obj(obj, fpos - obj->fd_bytes_read, SEEK_SET);
/* Allocate space for read buffer */
buftab = xalloc((size_t) val + 1);
if ((read(obj->fd, buftab, (size_t) val)) == -1)
dlg_exiterr("Error reading file in tabize().");
begin_line = count = 0;
if (first_pos != 0)
*first_pos = 0;
for (i = 0; i < val; i++) {
if ((first_pos != 0) && (count >= val)) {
*first_pos = find_first(obj, buftab, i);
break;
}
if (buftab[i] == TAB)
count += dialog_state.tab_len
- ((count - begin_line) % dialog_state.tab_len);
else if (buftab[i] == '\n') {
count++;
begin_line = count;
} else
count++;
}
lseek_obj(obj, fpos, SEEK_SET);
free(buftab);
return count;
}
/*
* Return current line of text.
* '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(MY_OBJ * obj)
{
int i = 0;
long fpos;
obj->end_reached = FALSE;
while (obj->buf[obj->in_buf] != '\n') {
if (obj->buf[obj->in_buf] == '\0') { /* Either end of file or end of buffer reached */
fpos = ftell_obj(obj);
if (fpos < obj->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
*/
read_high(obj, BUF_SIZE);
obj->in_buf = 0;
} else {
if (!obj->end_reached)
obj->end_reached = TRUE;
break;
}
} else if (i < MAX_LEN)
obj->line[i++] = obj->buf[obj->in_buf++];
else {
if (i == MAX_LEN) /* Truncate lines longer than MAX_LEN characters */
obj->line[i++] = '\0';
obj->in_buf++;
}
}
if (i <= MAX_LEN)
obj->line[i] = '\0';
if (!obj->end_reached)
obj->in_buf++; /* move past '\n' */
return obj->line;
}
static bool
match_string(MY_OBJ * obj, char *string)
{
char *match = get_line(obj);
return strstr(match, string) != 0;
}
/*
* Go back 'n' lines in text file. Called by dialog_textbox().
* 'in_buf' will be updated to point to the desired line in 'buf'.
*/
static void
back_lines(MY_OBJ * obj, long n)
{
int i;
long fpos;
long val_to_tabize;
obj->begin_reached = FALSE;
/* 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 '--in_buf' to move one character backward so as to
* skip '\n' of the previous line */
if (!obj->end_reached) {
/* Either beginning of buffer or beginning of file reached? */
if (obj->in_buf == 0) {
fpos = ftell_obj(obj);
if (fpos > obj->fd_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 + obj->fd_bytes_read) {
/* No, move less than */
lseek_obj(obj, 0L, SEEK_SET);
val_to_tabize = fpos - obj->fd_bytes_read;
} else { /* Move backward BUF_SIZE/2 bytes */
lseek_obj(obj, -(BUF_SIZE / 2 + obj->fd_bytes_read), SEEK_CUR);
val_to_tabize = BUF_SIZE / 2;
}
read_high(obj, BUF_SIZE);
obj->in_buf = tabize(obj, val_to_tabize, (long *) 0);
} else { /* Beginning of file reached */
obj->begin_reached = TRUE;
return;
}
}
obj->in_buf--;
if (obj->buf[obj->in_buf] != '\n')
/* Something's wrong... */
dlg_exiterr("Internal error in back_lines().");
}
/* Go back 'n' lines */
for (i = 0; i < n; i++) {
do {
if (obj->in_buf == 0) {
fpos = ftell_obj(obj);
if (fpos > obj->fd_bytes_read) {
/* Really possible to move backward BUF_SIZE/2 bytes? */
if (fpos < BUF_SIZE / 2 + obj->fd_bytes_read) {
/* No, move less than */
lseek_obj(obj, 0L, SEEK_SET);
val_to_tabize = fpos - obj->fd_bytes_read;
} else { /* Move backward BUF_SIZE/2 bytes */
lseek_obj(obj, -(BUF_SIZE / 2 + obj->fd_bytes_read), SEEK_CUR);
val_to_tabize = BUF_SIZE / 2;
}
read_high(obj, BUF_SIZE);
obj->in_buf = tabize(obj, val_to_tabize, (long *) 0);
} else { /* Beginning of file reached */
obj->begin_reached = TRUE;
return;
}
}
} while (obj->buf[--(obj->in_buf)] != '\n');
}
obj->in_buf++;
}
/*
* Print a new line of text.
*/
static void
print_line(MY_OBJ * obj, int row, int width)
{
if (wmove(obj->text, row, 0) != ERR) {
int i, y, x;
char *line = get_line(obj);
const int *cols = dlg_index_columns(line);
const int *indx = dlg_index_wchars(line);
int limit = dlg_count_wchars(line);
int first = 0;
int last = limit;
if (width > getmaxx(obj->text))
width = getmaxx(obj->text);
--width; /* for the leading ' ' */
for (i = 0; i <= limit && cols[i] < obj->hscroll; ++i)
first = i;
for (i = first; (i <= limit) && ((cols[i] - cols[first]) < width); ++i)
last = i;
(void) waddch(obj->text, ' ');
(void) waddnstr(obj->text, line + indx[first], indx[last] - indx[first]);
getyx(obj->text, y, x);
if (y == row) { /* Clear 'residue' of previous line */
for (i = 0; i <= width - x; i++) {
(void) waddch(obj->text, ' ');
}
}
}
}
/*
* Print a new page of text.
*/
static void
print_page(MY_OBJ * obj, int height, int width)
{
int i, passed_end = 0;
obj->page_length = 0;
for (i = 0; i < height; i++) {
print_line(obj, i, width);
if (!passed_end)
obj->page_length++;
if (obj->end_reached && !passed_end)
passed_end = 1;
}
(void) wnoutrefresh(obj->text);
}
/*
* Print current position
*/
static void
print_position(MY_OBJ * obj, WINDOW *win, int height, int width)
{
long fpos;
long size;
long first = -1;
fpos = ftell_obj(obj);
if (dialog_vars.tab_correct)
size = tabize(obj, obj->in_buf, &first);
else
first = find_first(obj, obj->buf, size = obj->in_buf);
dlg_draw_scrollbar(win,
first,
fpos - obj->fd_bytes_read + size,
fpos - obj->fd_bytes_read + size,
obj->file_size,
0, PAGE_WIDTH,
0, PAGE_LENGTH + 1,
border_attr,
border_attr);
}
/*
* Display a dialog box and get the search term from user.
*/
static int
get_search_term(WINDOW *dialog, char *input, int height, int width)
{
/* *INDENT-OFF* */
static DLG_KEYS_BINDING binding[] = {
INPUTSTR_BINDINGS,
HELPKEY_BINDINGS,
ENTERKEY_BINDINGS,
END_KEYS_BINDING
};
/* *INDENT-ON* */
int old_x, old_y;
int box_x, box_y;
int box_height, box_width;
int offset = 0;
int key = 0;
int fkey = 0;
bool first = TRUE;
int result = DLG_EXIT_UNKNOWN;
const char *caption = _("Search");
int len_caption = dlg_count_columns(caption);
const int *indx;
int limit;
WINDOW *widget;
getbegyx(dialog, old_y, old_x);
box_height = 1 + (2 * MARGIN);
box_width = len_caption + (2 * (MARGIN + 2));
box_width = MAX(box_width, 30);
box_width = MIN(box_width, getmaxx(dialog) - 2 * MARGIN);
len_caption = MIN(len_caption, box_width - (2 * (MARGIN + 1)));
box_x = (width - box_width) / 2;
box_y = (height - box_height) / 2;
widget = dlg_new_modal_window(dialog,
box_height, box_width,
old_y + box_y, old_x + box_x);
keypad(widget, TRUE);
dlg_register_window(widget, "searchbox", binding);
dlg_draw_box(widget, 0, 0, box_height, box_width,
searchbox_attr,
searchbox_border_attr);
wattrset(widget, searchbox_title_attr);
(void) wmove(widget, 0, (box_width - len_caption) / 2);
indx = dlg_index_wchars(caption);
limit = dlg_limit_columns(caption, len_caption, 0);
(void) waddnstr(widget, caption + indx[0], indx[limit] - indx[0]);
box_y++;
box_x++;
box_width -= 2;
offset = dlg_count_columns(input);
while (result == DLG_EXIT_UNKNOWN) {
if (!first) {
key = dlg_getc(widget, &fkey);
if (fkey) {
switch (fkey) {
#ifdef KEY_RESIZE
case KEY_RESIZE:
result = DLG_EXIT_CANCEL;
continue;
#endif
case DLGK_ENTER:
result = DLG_EXIT_OK;
continue;
}
} else if (key == ESC) {
result = DLG_EXIT_ESC;
continue;
} else if (key == ERR) {
napms(50);
continue;
}
}
if (dlg_edit_string(input, &offset, key, fkey, first)) {
dlg_show_string(widget, input, offset, searchbox_attr,
1, 1, box_width, FALSE, first);
first = FALSE;
}
}
dlg_del_window(widget);
return result;
}
static bool
perform_search(MY_OBJ * obj, int height, int width, int key, char *search_term)
{
int dir;
long tempinx;
long fpos;
int result;
bool found;
bool temp, temp1;
bool moved = FALSE;
/* set search direction */
dir = (key == '/' || key == 'n') ? 1 : 0;
if (dir ? !obj->end_reached : !obj->begin_reached) {
if (key == 'n' || key == 'N') {
if (search_term[0] == '\0') { /* No search term yet */
(void) beep();
return FALSE;
}
/* Get search term from user */
} else if ((result = get_search_term(obj->text, search_term,
PAGE_LENGTH,
PAGE_WIDTH)) != DLG_EXIT_OK
|| search_term[0] == '\0') {
#ifdef KEY_RESIZE
if (result == DLG_EXIT_CANCEL) {
ungetch(key);
ungetch(KEY_RESIZE);
/* FALLTHRU */
}
#endif
/* ESC pressed, or no search term, reprint page to clear box */
wattrset(obj->text, dialog_attr);
back_lines(obj, obj->page_length);
return TRUE;
}
/* Save variables for restoring in case search term can't be found */
tempinx = obj->in_buf;
temp = obj->begin_reached;
temp1 = obj->end_reached;
fpos = ftell_obj(obj) - obj->fd_bytes_read;
/* update 'in_buf' to point to next (previous) line before
forward (backward) searching */
back_lines(obj, (dir
? obj->page_length - 1
: obj->page_length + 1));
found = FALSE;
if (dir) { /* Forward search */
while ((found = match_string(obj, search_term)) == FALSE) {
if (obj->end_reached)
break;
}
} else { /* Backward search */
while ((found = match_string(obj, search_term)) == FALSE) {
if (obj->begin_reached)
break;
back_lines(obj, 2L);
}
}
if (found == FALSE) { /* not found */
(void) beep();
/* Restore program state to that before searching */
lseek_obj(obj, fpos, SEEK_SET);
read_high(obj, BUF_SIZE);
obj->in_buf = tempinx;
obj->begin_reached = temp;
obj->end_reached = temp1;
/* move 'in_buf' to point to start of current page to
* re-print current page. Note that 'in_buf' always points
* to start of next page, so this is necessary
*/
back_lines(obj, obj->page_length);
} else { /* Search term found */
back_lines(obj, 1L);
}
/* Reprint page */
wattrset(obj->text, dialog_attr);
moved = TRUE;
} else { /* no need to find */
(void) beep();
}
return moved;
}
/*
* Display text from a file in a dialog box.
*/
int
dialog_textbox(const char *title, const char *file, int height, int width)
{
/* *INDENT-OFF* */
static DLG_KEYS_BINDING binding[] = {
HELPKEY_BINDINGS,
ENTERKEY_BINDINGS,
DLG_KEYS_DATA( DLGK_GRID_DOWN, 'J' ),
DLG_KEYS_DATA( DLGK_GRID_DOWN, 'j' ),
DLG_KEYS_DATA( DLGK_GRID_DOWN, KEY_DOWN ),
DLG_KEYS_DATA( DLGK_GRID_LEFT, 'H' ),
DLG_KEYS_DATA( DLGK_GRID_LEFT, 'h' ),
DLG_KEYS_DATA( DLGK_GRID_LEFT, KEY_LEFT ),
DLG_KEYS_DATA( DLGK_GRID_RIGHT, 'L' ),
DLG_KEYS_DATA( DLGK_GRID_RIGHT, 'l' ),
DLG_KEYS_DATA( DLGK_GRID_RIGHT, KEY_RIGHT ),
DLG_KEYS_DATA( DLGK_GRID_UP, 'K' ),
DLG_KEYS_DATA( DLGK_GRID_UP, 'k' ),
DLG_KEYS_DATA( DLGK_GRID_UP, KEY_UP ),
DLG_KEYS_DATA( DLGK_PAGE_FIRST, 'g' ),
DLG_KEYS_DATA( DLGK_PAGE_FIRST, KEY_HOME ),
DLG_KEYS_DATA( DLGK_PAGE_LAST, 'G' ),
DLG_KEYS_DATA( DLGK_PAGE_LAST, KEY_END ),
DLG_KEYS_DATA( DLGK_PAGE_LAST, KEY_LL ),
DLG_KEYS_DATA( DLGK_PAGE_NEXT, ' ' ),
DLG_KEYS_DATA( DLGK_PAGE_NEXT, KEY_NPAGE ),
DLG_KEYS_DATA( DLGK_PAGE_PREV, 'B' ),
DLG_KEYS_DATA( DLGK_PAGE_PREV, 'b' ),
DLG_KEYS_DATA( DLGK_PAGE_PREV, KEY_PPAGE ),
DLG_KEYS_DATA( DLGK_BEGIN, '0' ),
DLG_KEYS_DATA( DLGK_BEGIN, KEY_BEG ),
DLG_KEYS_DATA( DLGK_FIELD_NEXT, TAB ),
DLG_KEYS_DATA( DLGK_FIELD_PREV, KEY_BTAB ),
END_KEYS_BINDING
};
/* *INDENT-ON* */
#ifdef KEY_RESIZE
int old_height = height;
int old_width = width;
#endif
long fpos;
int x, y, cur_x, cur_y;
int key = 0, fkey;
int next = 0;
int i, code, passed_end;
char search_term[MAX_LEN + 1];
MY_OBJ obj;
WINDOW *dialog;
bool moved;
int result = DLG_EXIT_UNKNOWN;
int button = dialog_vars.extra_button ? dlg_defaultno_button() : 0;
int min_width = 12;
search_term[0] = '\0'; /* no search term entered yet */
memset(&obj, 0, sizeof(obj));
obj.begin_reached = TRUE;
obj.buffer_first = TRUE;
obj.end_reached = FALSE;
obj.buttons = dlg_exit_label();
/* Open input file for reading */
if ((obj.fd = open(file, O_RDONLY)) == -1)
dlg_exiterr("Can't open input file %s", file);
/* Get file size. Actually, 'file_size' is the real file size - 1,
since it's only the last byte offset from the beginning */
obj.file_size = lseek_obj(&obj, 0L, SEEK_END);
/* Restore file pointer to beginning of file after getting file size */
lseek_obj(&obj, 0L, SEEK_SET);
read_high(&obj, BUF_SIZE);
dlg_button_layout(obj.buttons, &min_width);
#ifdef KEY_RESIZE
retry:
#endif
moved = TRUE;
dlg_auto_sizefile(title, file, &height, &width, 2, min_width);
dlg_print_size(height, width);
dlg_ctl_size(height, width);
x = dlg_box_x_ordinate(width);
y = dlg_box_y_ordinate(height);
dialog = dlg_new_window(height, width, y, x);
dlg_register_window(dialog, "textbox", binding);
dlg_register_buttons(dialog, "textbox", obj.buttons);
dlg_mouse_setbase(x, y);
/* Create window for text region, used for scrolling text */
obj.text = dlg_sub_window(dialog, PAGE_LENGTH, PAGE_WIDTH, y + 1, x + 1);
/* register the new window, along with its borders */
dlg_mouse_mkbigregion(0, 0, PAGE_LENGTH + 2, width, KEY_MAX, 1, 1, 1 /* lines */ );
dlg_draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
dlg_draw_bottom_box(dialog);
dlg_draw_title(dialog, title);
dlg_draw_buttons(dialog, PAGE_LENGTH + 2, 0, obj.buttons, button, FALSE, width);
(void) wnoutrefresh(dialog);
getyx(dialog, cur_y, cur_x); /* Save cursor position */
dlg_attr_clear(obj.text, PAGE_LENGTH, PAGE_WIDTH, dialog_attr);
while (result == DLG_EXIT_UNKNOWN) {
/*
* Update the screen according to whether we shifted up/down by a line
* or not.
*/
if (moved) {
if (next < 0) {
(void) scrollok(obj.text, TRUE);
(void) scroll(obj.text); /* Scroll text region up one line */
(void) scrollok(obj.text, FALSE);
print_line(&obj, PAGE_LENGTH - 1, PAGE_WIDTH);
(void) wnoutrefresh(obj.text);
} else if (next > 0) {
/*
* 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 'in_buf' should
* point to start of next page. This is done by calling
* get_line() in the following 'for' loop.
*/
(void) scrollok(obj.text, TRUE);
(void) wscrl(obj.text, -1); /* Scroll text region down one line */
(void) scrollok(obj.text, FALSE);
obj.page_length = 0;
passed_end = 0;
for (i = 0; i < PAGE_LENGTH; i++) {
if (!i) {
print_line(&obj, 0, PAGE_WIDTH); /* print first line of page */
(void) wnoutrefresh(obj.text);
} else
(void) get_line(&obj); /* Called to update 'end_reached' and 'in_buf' */
if (!passed_end)
obj.page_length++;
if (obj.end_reached && !passed_end)
passed_end = 1;
}
} else {
print_page(&obj, PAGE_LENGTH, PAGE_WIDTH);
}
print_position(&obj, dialog, height, width);
(void) wmove(dialog, cur_y, cur_x); /* Restore cursor position */
wrefresh(dialog);
}
moved = FALSE; /* assume we'll not move */
next = 0; /* ...but not scroll by a line */
key = dlg_mouse_wgetch(dialog, &fkey);
if (dlg_result_key(key, fkey, &result))
break;
if (!fkey && (code = dlg_char_to_button(key, obj.buttons)) >= 0) {
result = dlg_ok_buttoncode(code);
break;
}
if (fkey) {
switch (key) {
default:
if (is_DLGK_MOUSE(key)) {
result = dlg_exit_buttoncode(key - M_EVENT);
if (result < 0)
result = DLG_EXIT_OK;
} else {
beep();
}
break;
case DLGK_FIELD_NEXT:
button = dlg_next_button(obj.buttons, button);
if (button < 0)
button = 0;
dlg_draw_buttons(dialog,
height - 2, 0,
obj.buttons, button,
FALSE, width);
break;
case DLGK_FIELD_PREV:
button = dlg_prev_button(obj.buttons, button);
if (button < 0)
button = 0;
dlg_draw_buttons(dialog,
height - 2, 0,
obj.buttons, button,
FALSE, width);
break;
case DLGK_ENTER:
if (dialog_vars.nook)
result = DLG_EXIT_OK;
else
result = dlg_exit_buttoncode(button);
break;
case DLGK_PAGE_FIRST:
if (!obj.begin_reached) {
obj.begin_reached = 1;
/* First page not in buffer? */
fpos = ftell_obj(&obj);
if (fpos > obj.fd_bytes_read) {
/* Yes, we have to read it in */
lseek_obj(&obj, 0L, SEEK_SET);
read_high(&obj, BUF_SIZE);
}
obj.in_buf = 0;
moved = TRUE;
}
break;
case DLGK_PAGE_LAST:
obj.end_reached = TRUE;
/* Last page not in buffer? */
fpos = ftell_obj(&obj);
if (fpos < obj.file_size) {
/* Yes, we have to read it in */
lseek_obj(&obj, -BUF_SIZE, SEEK_END);
read_high(&obj, BUF_SIZE);
}
obj.in_buf = obj.bytes_read;
back_lines(&obj, (long) PAGE_LENGTH);
moved = TRUE;
break;
case DLGK_GRID_UP: /* Previous line */
if (!obj.begin_reached) {
back_lines(&obj, obj.page_length + 1);
next = 1;
moved = TRUE;
}
break;
case DLGK_PAGE_PREV: /* Previous page */
case DLGK_MOUSE(KEY_PPAGE):
if (!obj.begin_reached) {
back_lines(&obj, obj.page_length + PAGE_LENGTH);
moved = TRUE;
}
break;
case DLGK_GRID_DOWN: /* Next line */
if (!obj.end_reached) {
obj.begin_reached = 0;
next = -1;
moved = TRUE;
}
break;
case DLGK_PAGE_NEXT: /* Next page */
case DLGK_MOUSE(KEY_NPAGE):
if (!obj.end_reached) {
obj.begin_reached = 0;
moved = TRUE;
}
break;
case DLGK_BEGIN: /* Beginning of line */
if (obj.hscroll > 0) {
obj.hscroll = 0;
/* Reprint current page to scroll horizontally */
back_lines(&obj, obj.page_length);
moved = TRUE;
}
break;
case DLGK_GRID_LEFT: /* Scroll left */
if (obj.hscroll > 0) {
obj.hscroll--;
/* Reprint current page to scroll horizontally */
back_lines(&obj, obj.page_length);
moved = TRUE;
}
break;
case DLGK_GRID_RIGHT: /* Scroll right */
if (obj.hscroll < MAX_LEN) {
obj.hscroll++;
/* Reprint current page to scroll horizontally */
back_lines(&obj, obj.page_length);
moved = TRUE;
}
break;
#ifdef KEY_RESIZE
case KEY_RESIZE:
/* reset data */
height = old_height;
width = old_width;
back_lines(&obj, obj.page_length);
moved = TRUE;
/* repaint */
dlg_clear();
dlg_del_window(dialog);
refresh();
dlg_mouse_free_regions();
goto retry;
#endif
}
} else {
switch (key) {
case '/': /* Forward search */
case 'n': /* Repeat forward search */
case '?': /* Backward search */
case 'N': /* Repeat backward search */
moved = perform_search(&obj, height, width, key, search_term);
fkey = FALSE;
break;
default:
beep();
break;
}
}
}
dlg_del_window(dialog);
free(obj.buf);
(void) close(obj.fd);
dlg_mouse_free_regions();
return result;
}
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