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HardenedBSD/gnu/usr.bin/dialog/inputbox.c
Andrey A. Chernov 296c81b4e8 Implement HOME/END keys for line edit
1994-10-10 22:32:07 +00:00

280 lines
8.4 KiB
C
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/*
* inputbox.c -- implements the input 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"
/*
* Display a dialog box for inputing a string
*/
int dialog_inputbox(unsigned char *title, unsigned char *prompt, int height, int width)
{
int i, x, y, box_y, box_x, box_width,
input_x = 0, scroll = 0, key = 0, button = -1;
unsigned char instr[MAX_LEN+1];
WINDOW *dialog;
/* center dialog box on screen */
x = (COLS - width)/2;
y = (LINES - height)/2;
memset(instr, 0, sizeof(instr));
#ifdef HAVE_NCURSES
if (use_shadow)
draw_shadow(stdscr, y, x, height, width);
#endif
dialog = newwin(height, width, y, x);
keypad(dialog, TRUE);
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, ' ');
}
wattrset(dialog, dialog_attr);
print_autowrap(dialog, prompt, width, 1, 3);
/* Draw the input field box */
box_width = width-6;
getyx(dialog, y, x);
box_y = y + 2;
box_x = (width - box_width)/2;
draw_box(dialog, y+1, box_x-1, 3, box_width+2, border_attr, dialog_attr);
x = width/2-11;
y = height-2;
print_button(dialog, "Cancel", y, x+14, FALSE);
print_button(dialog, " OK ", y, x, TRUE);
wmove(dialog, box_y, box_x);
wrefresh(dialog);
while (key != ESC) {
key = wgetch(dialog);
if (button == -1) { /* Input box selected */
switch (key) {
case TAB:
case KEY_BTAB:
case KEY_UP:
case KEY_DOWN:
break;
case KEY_HOME:
input_x = scroll = 0;
wmove(dialog, box_y, box_x);
for (i = 0; i < box_width; i++)
waddch(dialog, instr[i] ? instr[i] : ' ');
wmove(dialog, box_y, box_x);
wrefresh(dialog);
continue;
case KEY_END:
for (i = strlen(instr) - 1; i >= scroll + input_x && instr[i] == ' '; i--)
instr[i] = '\0';
i++;
input_x = i % box_width;
scroll = i - input_x;
wmove(dialog, box_y, box_x);
for (i = 0; i < box_width; i++)
waddch(dialog, instr[scroll+i] ? instr[scroll+i] : ' ');
wmove(dialog, box_y, input_x + box_x);
wrefresh(dialog);
continue;
case KEY_LEFT:
if (input_x || scroll) {
wattrset(dialog, inputbox_attr);
if (!input_x) {
int oldscroll = scroll;
scroll = scroll < box_width-1 ? 0 : scroll-(box_width-1);
wmove(dialog, box_y, box_x);
for (i = 0; i < box_width; i++)
waddch(dialog, instr[scroll+input_x+i] ? instr[scroll+input_x+i] : ' ');
input_x = oldscroll - 1 - scroll;
}
else
input_x--;
wmove(dialog, box_y, input_x + box_x);
wrefresh(dialog);
}
continue;
case KEY_RIGHT:
if (scroll+input_x < MAX_LEN) {
wattrset(dialog, inputbox_attr);
if (!instr[scroll+input_x])
instr[scroll+input_x] = ' ';
if (input_x == box_width-1) {
scroll++;
wmove(dialog, box_y, box_x);
for (i = 0; i < box_width; i++)
waddch(dialog, instr[scroll+i] ? instr[scroll+i] : ' ');
wmove(dialog, box_y, box_x + box_width - 1);
}
else {
wmove(dialog, box_y, input_x + box_x);
waddch(dialog, instr[scroll+input_x]);
input_x++;
}
wrefresh(dialog);
} else
flash(); /* Alarm user about overflow */
continue;
case KEY_BACKSPACE:
case KEY_DC:
if (input_x || scroll) {
i = strlen(instr);
memmove(instr+scroll+input_x-1, instr+scroll+input_x, i-scroll+input_x+1);
wattrset(dialog, inputbox_attr);
if (!input_x) {
int oldscroll = scroll;
scroll = scroll < box_width-1 ? 0 : scroll-(box_width-1);
wmove(dialog, box_y, box_x);
for (i = 0; i < box_width; i++)
waddch(dialog, instr[scroll+input_x+i] ? instr[scroll+input_x+i] : ' ');
input_x = oldscroll - 1 - scroll;
}
else
input_x--;
wmove(dialog, box_y, input_x + box_x);
for (i = input_x; i < box_width; i++)
waddch(dialog, instr[scroll+i] ? instr[scroll+i] : ' ');
wmove(dialog, box_y, input_x + box_x);
wrefresh(dialog);
}
continue;
default:
if (key < 0x100 && isprint(key)) {
for (i = strlen(instr) - 1; i >= scroll + input_x && instr[i] == ' '; i--)
instr[i] = '\0';
i++;
if (i < MAX_LEN) {
memmove(instr+scroll+input_x+1, instr+scroll+input_x, i-scroll+input_x);
wattrset(dialog, inputbox_attr);
instr[scroll+input_x] = key;
if (input_x == box_width-1) {
scroll++;
wmove(dialog, box_y, box_x);
for (i = 0; i < box_width-1; i++)
waddch(dialog, instr[scroll+i]);
}
else {
wmove(dialog, box_y, input_x + box_x);
for (i = input_x; i < box_width; i++)
waddch(dialog, instr[scroll+i] ? instr[scroll+i] : ' ');
wmove(dialog, box_y, ++input_x + box_x);
}
wrefresh(dialog);
} else
flash(); /* Alarm user about overflow */
continue;
}
}
}
switch (key) {
case 'O':
case 'o':
delwin(dialog);
fprintf(stderr, instr);
return 0;
case 'C':
case 'c':
delwin(dialog);
return 1;
case KEY_UP:
case KEY_LEFT:
case KEY_BTAB:
switch (button) {
case -1:
button = 1; /* Indicates "Cancel" button is selected */
print_button(dialog, " OK ", y, x, FALSE);
print_button(dialog, "Cancel", y, x+14, TRUE);
wrefresh(dialog);
break;
case 0:
button = -1; /* Indicates input box is selected */
print_button(dialog, "Cancel", y, x+14, FALSE);
print_button(dialog, " OK ", y, x, TRUE);
wmove(dialog, box_y, box_x + input_x);
wrefresh(dialog);
break;
case 1:
button = 0; /* Indicates "OK" button is selected */
print_button(dialog, "Cancel", y, x+14, FALSE);
print_button(dialog, " OK ", y, x, TRUE);
wrefresh(dialog);
break;
}
break;
case TAB:
case KEY_DOWN:
case KEY_RIGHT:
switch (button) {
case -1:
button = 0; /* Indicates "OK" button is selected */
print_button(dialog, "Cancel", y, x+14, FALSE);
print_button(dialog, " OK ", y, x, TRUE);
wrefresh(dialog);
break;
case 0:
button = 1; /* Indicates "Cancel" button is selected */
print_button(dialog, " OK ", y, x, FALSE);
print_button(dialog, "Cancel", y, x+14, TRUE);
wrefresh(dialog);
break;
case 1:
button = -1; /* Indicates input box is selected */
print_button(dialog, "Cancel", y, x+14, FALSE);
print_button(dialog, " OK ", y, x, TRUE);
wmove(dialog, box_y, box_x + input_x);
wrefresh(dialog);
break;
}
break;
case ' ':
case '\n':
delwin(dialog);
for (i = strlen(instr) - 1; i >= scroll + input_x && instr[i] == ' '; i--)
instr[i] = '\0';
fprintf(stderr, instr);
return (button == -1 ? 0 : button);
case ESC:
break;
}
}
delwin(dialog);
return -1; /* ESC pressed */
}
/* End of dialog_inputbox() */
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