view kconfig/lxdialog/inputbox.c @ 953:13916d161ec0

xzcat: remove XZ_(PREALLOC|SINGLE), inline xz_dec_bcj_create Because we only use XZ_DYNALLOC, there's a bunch of dead code. This patch removes the #ifdef's and if()s associated with support for multiple modes. single_call was only used to store the mode; it is no longer needed. A little bit of reorganization was needed to reduce the number of prototypes. Documentation associated with dead code was dropped. There are still some relics of multiple modes in the continued presence of "XZ_DYNALLOC" and xz_mode. Additionally, I inlined xz_dec_bcj_create; it was called once. This loses about 125 lines, mostly comments.
author Isaac Dunham <idunham@lavabit.com>
date Wed, 17 Jul 2013 17:25:07 -0500
parents 4d21d59f3206
children
line wrap: on
line source

/*
 *  inputbox.c -- implements the input box
 *
 *  ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
 *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
 *
 *  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"

char dialog_input_result[MAX_LEN + 1];

/*
 *  Print the termination buttons
 */
static void print_buttons(WINDOW * dialog, int height, int width, int selected)
{
	int x = width / 2 - 11;
	int y = height - 2;

	print_button(dialog, "  Ok  ", y, x, selected == 0);
	print_button(dialog, " Help ", y, x + 14, selected == 1);

	wmove(dialog, y, x + 1 + 14 * selected);
	wrefresh(dialog);
}

/*
 * Display a dialog box for inputing a string
 */
int dialog_inputbox(const char *title, const char *prompt, int height, int width,
                    const char *init)
{
	int i, x, y, box_y, box_x, box_width;
	int input_x = 0, scroll = 0, key = 0, button = -1;
	char *instr = dialog_input_result;
	WINDOW *dialog;

	if (!init)
		instr[0] = '\0';
	else
		strcpy(instr, init);

do_resize:
	if (getmaxy(stdscr) <= (height - 2))
		return -ERRDISPLAYTOOSMALL;
	if (getmaxx(stdscr) <= (width - 2))
		return -ERRDISPLAYTOOSMALL;

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

	draw_shadow(stdscr, y, x, height, width);

	dialog = newwin(height, width, y, x);
	keypad(dialog, TRUE);

	draw_box(dialog, 0, 0, height, width,
		 dlg.dialog.atr, dlg.border.atr);
	wattrset(dialog, dlg.border.atr);
	mvwaddch(dialog, height - 3, 0, ACS_LTEE);
	for (i = 0; i < width - 2; i++)
		waddch(dialog, ACS_HLINE);
	wattrset(dialog, dlg.dialog.atr);
	waddch(dialog, ACS_RTEE);

	print_title(dialog, title, width);

	wattrset(dialog, dlg.dialog.atr);
	print_autowrap(dialog, prompt, width - 2, 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,
		 dlg.border.atr, dlg.dialog.atr);

	print_buttons(dialog, height, width, 0);

	/* Set up the initial value */
	wmove(dialog, box_y, box_x);
	wattrset(dialog, dlg.inputbox.atr);

	input_x = strlen(instr);

	if (input_x >= box_width) {
		scroll = input_x - box_width + 1;
		input_x = box_width - 1;
		for (i = 0; i < box_width - 1; i++)
			waddch(dialog, instr[scroll + i]);
	} else {
		waddstr(dialog, instr);
	}

	wmove(dialog, box_y, box_x + input_x);

	wrefresh(dialog);

	while (key != KEY_ESC) {
		key = wgetch(dialog);

		if (button == -1) {	/* Input box selected */
			switch (key) {
			case TAB:
			case KEY_UP:
			case KEY_DOWN:
				break;
			case KEY_LEFT:
				continue;
			case KEY_RIGHT:
				continue;
			case KEY_BACKSPACE:
			case 127:
				if (input_x || scroll) {
					wattrset(dialog, dlg.inputbox.atr);
					if (!input_x) {
						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 = strlen(instr) - scroll;
					} else
						input_x--;
					instr[scroll + input_x] = '\0';
					mvwaddch(dialog, box_y, input_x + box_x, ' ');
					wmove(dialog, box_y, input_x + box_x);
					wrefresh(dialog);
				}
				continue;
			default:
				if (key < 0x100 && isprint(key)) {
					if (scroll + input_x < MAX_LEN) {
						wattrset(dialog, dlg.inputbox.atr);
						instr[scroll + input_x] = key;
						instr[scroll + input_x + 1] = '\0';
						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);
							waddch(dialog, key);
						}
						wrefresh(dialog);
					} else
						flash();	/* Alarm user about overflow */
					continue;
				}
			}
		}
		switch (key) {
		case 'O':
		case 'o':
			delwin(dialog);
			return 0;
		case 'H':
		case 'h':
			delwin(dialog);
			return 1;
		case KEY_UP:
		case KEY_LEFT:
			switch (button) {
			case -1:
				button = 1;	/* Indicates "Cancel" button is selected */
				print_buttons(dialog, height, width, 1);
				break;
			case 0:
				button = -1;	/* Indicates input box is selected */
				print_buttons(dialog, height, width, 0);
				wmove(dialog, box_y, box_x + input_x);
				wrefresh(dialog);
				break;
			case 1:
				button = 0;	/* Indicates "OK" button is selected */
				print_buttons(dialog, height, width, 0);
				break;
			}
			break;
		case TAB:
		case KEY_DOWN:
		case KEY_RIGHT:
			switch (button) {
			case -1:
				button = 0;	/* Indicates "OK" button is selected */
				print_buttons(dialog, height, width, 0);
				break;
			case 0:
				button = 1;	/* Indicates "Cancel" button is selected */
				print_buttons(dialog, height, width, 1);
				break;
			case 1:
				button = -1;	/* Indicates input box is selected */
				print_buttons(dialog, height, width, 0);
				wmove(dialog, box_y, box_x + input_x);
				wrefresh(dialog);
				break;
			}
			break;
		case ' ':
		case '\n':
			delwin(dialog);
			return (button == -1 ? 0 : button);
		case 'X':
		case 'x':
			key = KEY_ESC;
			break;
		case KEY_ESC:
			key = on_key_esc(dialog);
			break;
		case KEY_RESIZE:
			delwin(dialog);
			on_key_resize();
			goto do_resize;
		}
	}

	delwin(dialog);
	return KEY_ESC;		/* ESC pressed */
}