Root/scripts/config/lxdialog/inputbox.c

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    /* center dialog box on screen */
53    x = (COLS - width) / 2;
54    y = (LINES - height) / 2;
55
56    draw_shadow(stdscr, y, x, height, width);
57
58    dialog = newwin(height, width, y, x);
59    keypad(dialog, TRUE);
60
61    draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
62    wattrset(dialog, border_attr);
63    mvwaddch(dialog, height - 3, 0, ACS_LTEE);
64    for (i = 0; i < width - 2; i++)
65        waddch(dialog, ACS_HLINE);
66    wattrset(dialog, dialog_attr);
67    waddch(dialog, ACS_RTEE);
68
69    print_title(dialog, title, width);
70
71    wattrset(dialog, dialog_attr);
72    print_autowrap(dialog, prompt, width - 2, 1, 3);
73
74    /* Draw the input field box */
75    box_width = width - 6;
76    getyx(dialog, y, x);
77    box_y = y + 2;
78    box_x = (width - box_width) / 2;
79    draw_box(dialog, y + 1, box_x - 1, 3, box_width + 2, border_attr, dialog_attr);
80
81    print_buttons(dialog, height, width, 0);
82
83    /* Set up the initial value */
84    wmove(dialog, box_y, box_x);
85    wattrset(dialog, inputbox_attr);
86
87    if (!init)
88        instr[0] = '\0';
89    else
90        strcpy(instr, init);
91
92    input_x = strlen(instr);
93
94    if (input_x >= box_width) {
95        scroll = input_x - box_width + 1;
96        input_x = box_width - 1;
97        for (i = 0; i < box_width - 1; i++)
98            waddch(dialog, instr[scroll + i]);
99    } else {
100        waddstr(dialog, instr);
101    }
102
103    wmove(dialog, box_y, box_x + input_x);
104
105    wrefresh(dialog);
106
107    while (key != ESC) {
108        key = wgetch(dialog);
109
110        if (button == -1) { /* Input box selected */
111            switch (key) {
112            case TAB:
113            case KEY_UP:
114            case KEY_DOWN:
115                break;
116            case KEY_LEFT:
117                continue;
118            case KEY_RIGHT:
119                continue;
120            case KEY_BACKSPACE:
121            case 127:
122                if (input_x || scroll) {
123                    wattrset(dialog, inputbox_attr);
124                    if (!input_x) {
125                        scroll = scroll < box_width - 1 ? 0 : scroll - (box_width - 1);
126                        wmove(dialog, box_y, box_x);
127                        for (i = 0; i < box_width; i++)
128                            waddch(dialog,
129                                   instr[scroll + input_x + i] ?
130                                   instr[scroll + input_x + i] : ' ');
131                        input_x = strlen(instr) - scroll;
132                    } else
133                        input_x--;
134                    instr[scroll + input_x] = '\0';
135                    mvwaddch(dialog, box_y, input_x + box_x, ' ');
136                    wmove(dialog, box_y, input_x + box_x);
137                    wrefresh(dialog);
138                }
139                continue;
140            default:
141                if (key < 0x100 && isprint(key)) {
142                    if (scroll + input_x < MAX_LEN) {
143                        wattrset(dialog, inputbox_attr);
144                        instr[scroll + input_x] = key;
145                        instr[scroll + input_x + 1] = '\0';
146                        if (input_x == box_width - 1) {
147                            scroll++;
148                            wmove(dialog, box_y, box_x);
149                            for (i = 0; i < box_width - 1; i++)
150                                waddch(dialog, instr [scroll + i]);
151                        } else {
152                            wmove(dialog, box_y, input_x++ + box_x);
153                            waddch(dialog, key);
154                        }
155                        wrefresh(dialog);
156                    } else
157                        flash(); /* Alarm user about overflow */
158                    continue;
159                }
160            }
161        }
162        switch (key) {
163        case 'O':
164        case 'o':
165            delwin(dialog);
166            return 0;
167        case 'H':
168        case 'h':
169            delwin(dialog);
170            return 1;
171        case KEY_UP:
172        case KEY_LEFT:
173            switch (button) {
174            case -1:
175                button = 1; /* Indicates "Cancel" button is selected */
176                print_buttons(dialog, height, width, 1);
177                break;
178            case 0:
179                button = -1; /* Indicates input box is selected */
180                print_buttons(dialog, height, width, 0);
181                wmove(dialog, box_y, box_x + input_x);
182                wrefresh(dialog);
183                break;
184            case 1:
185                button = 0; /* Indicates "OK" button is selected */
186                print_buttons(dialog, height, width, 0);
187                break;
188            }
189            break;
190        case TAB:
191        case KEY_DOWN:
192        case KEY_RIGHT:
193            switch (button) {
194            case -1:
195                button = 0; /* Indicates "OK" button is selected */
196                print_buttons(dialog, height, width, 0);
197                break;
198            case 0:
199                button = 1; /* Indicates "Cancel" button is selected */
200                print_buttons(dialog, height, width, 1);
201                break;
202            case 1:
203                button = -1; /* Indicates input box is selected */
204                print_buttons(dialog, height, width, 0);
205                wmove(dialog, box_y, box_x + input_x);
206                wrefresh(dialog);
207                break;
208            }
209            break;
210        case ' ':
211        case '\n':
212            delwin(dialog);
213            return (button == -1 ? 0 : button);
214        case 'X':
215        case 'x':
216            key = ESC;
217        case ESC:
218            break;
219        }
220    }
221
222    delwin(dialog);
223    return -1; /* ESC pressed */
224}
225

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