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
24unsigned char dialog_input_result[MAX_LEN + 1];
25
26/*
27 *  Print the termination buttons
28 */
29static void
30print_buttons(WINDOW *dialog, int height, int width, int selected)
31{
32    int x = width / 2 - 11;
33    int y = height - 2;
34
35    print_button (dialog, "  Ok  ", y, x, selected==0);
36    print_button (dialog, " Help ", y, x + 14, selected==1);
37
38    wmove(dialog, y, x+1+14*selected);
39    wrefresh(dialog);
40}
41
42/*
43 * Display a dialog box for inputing a string
44 */
45int
46dialog_inputbox (const char *title, const char *prompt, int height, int width,
47		 const char *init)
48{
49    int i, x, y, box_y, box_x, box_width;
50    int input_x = 0, scroll = 0, key = 0, button = -1;
51    unsigned char *instr = dialog_input_result;
52    WINDOW *dialog;
53
54    /* center dialog box on screen */
55    x = (COLS - width) / 2;
56    y = (LINES - height) / 2;
57
58
59    draw_shadow (stdscr, y, x, height, width);
60
61    dialog = newwin (height, width, y, x);
62    keypad (dialog, TRUE);
63
64    draw_box (dialog, 0, 0, height, width, dialog_attr, border_attr);
65    wattrset (dialog, border_attr);
66    mvwaddch (dialog, height-3, 0, ACS_LTEE);
67    for (i = 0; i < width - 2; i++)
68	waddch (dialog, ACS_HLINE);
69    wattrset (dialog, dialog_attr);
70    waddch (dialog, ACS_RTEE);
71
72    if (title != NULL && strlen(title) >= width-2 ) {
73	/* truncate long title -- mec */
74	char * title2 = malloc(width-2+1);
75	memcpy( title2, title, width-2 );
76	title2[width-2] = '\0';
77	title = title2;
78    }
79
80    if (title != NULL) {
81	wattrset (dialog, title_attr);
82	mvwaddch (dialog, 0, (width - strlen(title))/2 - 1, ' ');
83	waddstr (dialog, (char *)title);
84	waddch (dialog, ' ');
85    }
86
87    wattrset (dialog, dialog_attr);
88    print_autowrap (dialog, prompt, width - 2, 1, 3);
89
90    /* Draw the input field box */
91    box_width = width - 6;
92    getyx (dialog, y, x);
93    box_y = y + 2;
94    box_x = (width - box_width) / 2;
95    draw_box (dialog, y + 1, box_x - 1, 3, box_width + 2,
96	      border_attr, dialog_attr);
97
98    print_buttons(dialog, height, width, 0);
99
100    /* Set up the initial value */
101    wmove (dialog, box_y, box_x);
102    wattrset (dialog, inputbox_attr);
103
104    if (!init)
105	instr[0] = '\0';
106    else
107	strcpy (instr, init);
108
109    input_x = strlen (instr);
110
111    if (input_x >= box_width) {
112	scroll = input_x - box_width + 1;
113	input_x = box_width - 1;
114	for (i = 0; i < box_width - 1; i++)
115	    waddch (dialog, instr[scroll + i]);
116    } else
117	waddstr (dialog, instr);
118
119    wmove (dialog, box_y, box_x + input_x);
120
121    wrefresh (dialog);
122
123    while (key != ESC) {
124	key = wgetch (dialog);
125
126	if (button == -1) {	/* Input box selected */
127	    switch (key) {
128	    case TAB:
129	    case KEY_UP:
130	    case KEY_DOWN:
131		break;
132	    case KEY_LEFT:
133		continue;
134	    case KEY_RIGHT:
135		continue;
136	    case KEY_BACKSPACE:
137	    case 127:
138		if (input_x || scroll) {
139		    wattrset (dialog, inputbox_attr);
140		    if (!input_x) {
141			scroll = scroll < box_width - 1 ?
142			    0 : scroll - (box_width - 1);
143			wmove (dialog, box_y, box_x);
144			for (i = 0; i < box_width; i++)
145			    waddch (dialog, instr[scroll + input_x + i] ?
146				    instr[scroll + input_x + i] : ' ');
147			input_x = strlen (instr) - scroll;
148		    } else
149			input_x--;
150		    instr[scroll + input_x] = '\0';
151		    mvwaddch (dialog, box_y, input_x + box_x, ' ');
152		    wmove (dialog, box_y, input_x + box_x);
153		    wrefresh (dialog);
154		}
155		continue;
156	    default:
157		if (key < 0x100 && isprint (key)) {
158		    if (scroll + input_x < MAX_LEN) {
159			wattrset (dialog, inputbox_attr);
160			instr[scroll + input_x] = key;
161			instr[scroll + input_x + 1] = '\0';
162			if (input_x == box_width - 1) {
163			    scroll++;
164			    wmove (dialog, box_y, box_x);
165			    for (i = 0; i < box_width - 1; i++)
166				waddch (dialog, instr[scroll + i]);
167			} else {
168			    wmove (dialog, box_y, input_x++ + box_x);
169			    waddch (dialog, key);
170			}
171			wrefresh (dialog);
172		    } else
173			flash ();	/* Alarm user about overflow */
174		    continue;
175		}
176	    }
177	}
178	switch (key) {
179	case 'O':
180	case 'o':
181	    delwin (dialog);
182	    return 0;
183	case 'H':
184	case 'h':
185	    delwin (dialog);
186	    return 1;
187	case KEY_UP:
188	case KEY_LEFT:
189	    switch (button) {
190	    case -1:
191		button = 1;	/* Indicates "Cancel" button is selected */
192		print_buttons(dialog, height, width, 1);
193		break;
194	    case 0:
195		button = -1;	/* Indicates input box is selected */
196		print_buttons(dialog, height, width, 0);
197		wmove (dialog, box_y, box_x + input_x);
198		wrefresh (dialog);
199		break;
200	    case 1:
201		button = 0;	/* Indicates "OK" button is selected */
202		print_buttons(dialog, height, width, 0);
203		break;
204	    }
205	    break;
206	case TAB:
207	case KEY_DOWN:
208	case KEY_RIGHT:
209	    switch (button) {
210	    case -1:
211		button = 0;	/* Indicates "OK" button is selected */
212		print_buttons(dialog, height, width, 0);
213		break;
214	    case 0:
215		button = 1;	/* Indicates "Cancel" button is selected */
216		print_buttons(dialog, height, width, 1);
217		break;
218	    case 1:
219		button = -1;	/* Indicates input box is selected */
220		print_buttons(dialog, height, width, 0);
221		wmove (dialog, box_y, box_x + input_x);
222		wrefresh (dialog);
223		break;
224	    }
225	    break;
226	case ' ':
227	case '\n':
228	    delwin (dialog);
229	    return (button == -1 ? 0 : button);
230	case 'X':
231	case 'x':
232	    key = ESC;
233	case ESC:
234	    break;
235	}
236    }
237
238    delwin (dialog);
239    return -1;			/* ESC pressed */
240}
241