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[akaros.git] / 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
24 char dialog_input_result[MAX_LEN + 1];
25
26 /*
27  *  Print the termination buttons
28  */
29 static 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  */
44 int 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
57 do_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 }