1/*
2 *  inputbox.c -- implements the input box
3 *
4 *  ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk)
5 *  MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com)
6 *
7 *  This program is free software; you can redistribute it and/or
8 *  modify it under the terms of the GNU General Public License
9 *  as published by the Free Software Foundation; either version 2
10 *  of the License, or (at your option) any later version.
11 *
12 *  This program is distributed in the hope that it will be useful,
13 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
14 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15 *  GNU General Public License for more details.
16 *
17 *  You should have received a copy of the GNU General Public License
18 *  along with this program; if not, write to the Free Software
19 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 */
21
22#include "dialog.h"
23
24char dialog_input_result[MAX_LEN + 1];
25
26/*
27 *  Print the termination buttons
28 */
29static void print_buttons(WINDOW * dialog, int height, int width, int selected)
30{
31	int x = width / 2 - 11;
32	int y = height - 2;
33
34	print_button(dialog, "  Ok  ", y, x, selected == 0);
35	print_button(dialog, " Help ", y, x + 14, selected == 1);
36
37	wmove(dialog, y, x + 1 + 14 * selected);
38	wrefresh(dialog);
39}
40
41/*
42 * Display a dialog box for inputing a string
43 */
44int dialog_inputbox(const char *title, const char *prompt, int height, int width,
45                    const char *init)
46{
47	int i, x, y, box_y, box_x, box_width;
48	int input_x = 0, scroll = 0, key = 0, button = -1;
49	char *instr = dialog_input_result;
50	WINDOW *dialog;
51
52	if (!init)
53		instr[0] = '\0';
54	else
55		strcpy(instr, init);
56
57do_resize:
58	if (getmaxy(stdscr) <= (height - 2))
59		return -ERRDISPLAYTOOSMALL;
60	if (getmaxx(stdscr) <= (width - 2))
61		return -ERRDISPLAYTOOSMALL;
62
63	/* center dialog box on screen */
64	x = (COLS - width) / 2;
65	y = (LINES - height) / 2;
66
67	draw_shadow(stdscr, y, x, height, width);
68
69	dialog = newwin(height, width, y, x);
70	keypad(dialog, TRUE);
71
72	draw_box(dialog, 0, 0, height, width,
73		 dlg.dialog.atr, dlg.border.atr);
74	wattrset(dialog, dlg.border.atr);
75	mvwaddch(dialog, height - 3, 0, ACS_LTEE);
76	for (i = 0; i < width - 2; i++)
77		waddch(dialog, ACS_HLINE);
78	wattrset(dialog, dlg.dialog.atr);
79	waddch(dialog, ACS_RTEE);
80
81	print_title(dialog, title, width);
82
83	wattrset(dialog, dlg.dialog.atr);
84	print_autowrap(dialog, prompt, width - 2, 1, 3);
85
86	/* Draw the input field box */
87	box_width = width - 6;
88	getyx(dialog, y, x);
89	box_y = y + 2;
90	box_x = (width - box_width) / 2;
91	draw_box(dialog, y + 1, box_x - 1, 3, box_width + 2,
92		 dlg.border.atr, dlg.dialog.atr);
93
94	print_buttons(dialog, height, width, 0);
95
96	/* Set up the initial value */
97	wmove(dialog, box_y, box_x);
98	wattrset(dialog, dlg.inputbox.atr);
99
100	input_x = strlen(instr);
101
102	if (input_x >= box_width) {
103		scroll = input_x - box_width + 1;
104		input_x = box_width - 1;
105		for (i = 0; i < box_width - 1; i++)
106			waddch(dialog, instr[scroll + i]);
107	} else {
108		waddstr(dialog, instr);
109	}
110
111	wmove(dialog, box_y, box_x + input_x);
112
113	wrefresh(dialog);
114
115	while (key != KEY_ESC) {
116		key = wgetch(dialog);
117
118		if (button == -1) {	/* Input box selected */
119			switch (key) {
120			case TAB:
121			case KEY_UP:
122			case KEY_DOWN:
123				break;
124			case KEY_LEFT:
125				continue;
126			case KEY_RIGHT:
127				continue;
128			case KEY_BACKSPACE:
129			case 127:
130				if (input_x || scroll) {
131					wattrset(dialog, dlg.inputbox.atr);
132					if (!input_x) {
133						scroll = scroll < box_width - 1 ? 0 : scroll - (box_width - 1);
134						wmove(dialog, box_y, box_x);
135						for (i = 0; i < box_width; i++)
136							waddch(dialog,
137							       instr[scroll + input_x + i] ?
138							       instr[scroll + input_x + i] : ' ');
139						input_x = strlen(instr) - scroll;
140					} else
141						input_x--;
142					instr[scroll + input_x] = '\0';
143					mvwaddch(dialog, box_y, input_x + box_x, ' ');
144					wmove(dialog, box_y, input_x + box_x);
145					wrefresh(dialog);
146				}
147				continue;
148			default:
149				if (key < 0x100 && isprint(key)) {
150					if (scroll + input_x < MAX_LEN) {
151						wattrset(dialog, dlg.inputbox.atr);
152						instr[scroll + input_x] = key;
153						instr[scroll + input_x + 1] = '\0';
154						if (input_x == box_width - 1) {
155							scroll++;
156							wmove(dialog, box_y, box_x);
157							for (i = 0; i < box_width - 1; i++)
158								waddch(dialog, instr [scroll + i]);
159						} else {
160							wmove(dialog, box_y, input_x++ + box_x);
161							waddch(dialog, key);
162						}
163						wrefresh(dialog);
164					} else
165						flash();	/* Alarm user about overflow */
166					continue;
167				}
168			}
169		}
170		switch (key) {
171		case 'O':
172		case 'o':
173			delwin(dialog);
174			return 0;
175		case 'H':
176		case 'h':
177			delwin(dialog);
178			return 1;
179		case KEY_UP:
180		case KEY_LEFT:
181			switch (button) {
182			case -1:
183				button = 1;	/* Indicates "Cancel" button is selected */
184				print_buttons(dialog, height, width, 1);
185				break;
186			case 0:
187				button = -1;	/* Indicates input box is selected */
188				print_buttons(dialog, height, width, 0);
189				wmove(dialog, box_y, box_x + input_x);
190				wrefresh(dialog);
191				break;
192			case 1:
193				button = 0;	/* Indicates "OK" button is selected */
194				print_buttons(dialog, height, width, 0);
195				break;
196			}
197			break;
198		case TAB:
199		case KEY_DOWN:
200		case KEY_RIGHT:
201			switch (button) {
202			case -1:
203				button = 0;	/* Indicates "OK" button is selected */
204				print_buttons(dialog, height, width, 0);
205				break;
206			case 0:
207				button = 1;	/* Indicates "Cancel" button is selected */
208				print_buttons(dialog, height, width, 1);
209				break;
210			case 1:
211				button = -1;	/* Indicates input box is selected */
212				print_buttons(dialog, height, width, 0);
213				wmove(dialog, box_y, box_x + input_x);
214				wrefresh(dialog);
215				break;
216			}
217			break;
218		case ' ':
219		case '\n':
220			delwin(dialog);
221			return (button == -1 ? 0 : button);
222		case 'X':
223		case 'x':
224			key = KEY_ESC;
225			break;
226		case KEY_ESC:
227			key = on_key_esc(dialog);
228			break;
229		case KEY_RESIZE:
230			delwin(dialog);
231			on_key_resize();
232			goto do_resize;
233		}
234	}
235
236	delwin(dialog);
237	return KEY_ESC;		/* ESC pressed */
238}
239