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 */
print_buttons(WINDOW * dialog,int height,int width,int selected)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, " 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 */
dialog_inputbox(const char * title,const char * prompt,int height,int width,const char * init)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.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