Root/scripts/kconfig/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, gettext(" Ok "), y, x, selected == 0);
35    print_button(dialog, gettext(" 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.dialog.atr, dlg.border.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 "Help" 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 "Help" 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

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