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, 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 */
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, key = 0, button = -1;
49 int show_x, len, pos;
50 char *instr = dialog_input_result;
51 WINDOW *dialog;
52
53 if (!init)
54 instr[0] = '\0';
55 else
56 strcpy(instr, init);
57
58 do_resize:
59 if (getmaxy(stdscr) <= (height - INPUTBOX_HEIGTH_MIN))
60 return -ERRDISPLAYTOOSMALL;
61 if (getmaxx(stdscr) <= (width - INPUTBOX_WIDTH_MIN))
62 return -ERRDISPLAYTOOSMALL;
63
64 /* center dialog box on screen */
65 x = (getmaxx(stdscr) - width) / 2;
66 y = (getmaxy(stdscr) - height) / 2;
67
68 draw_shadow(stdscr, y, x, height, width);
69
70 dialog = newwin(height, width, y, x);
71 keypad(dialog, TRUE);
72
73 draw_box(dialog, 0, 0, height, width,
74 dlg.dialog.atr, dlg.border.atr);
75 wattrset(dialog, dlg.border.atr);
76 mvwaddch(dialog, height - 3, 0, ACS_LTEE);
77 for (i = 0; i < width - 2; i++)
78 waddch(dialog, ACS_HLINE);
79 wattrset(dialog, dlg.dialog.atr);
80 waddch(dialog, ACS_RTEE);
81
82 print_title(dialog, title, width);
83
84 wattrset(dialog, dlg.dialog.atr);
85 print_autowrap(dialog, prompt, width - 2, 1, 3);
86
87 /* Draw the input field box */
88 box_width = width - 6;
89 getyx(dialog, y, x);
90 box_y = y + 2;
91 box_x = (width - box_width) / 2;
92 draw_box(dialog, y + 1, box_x - 1, 3, box_width + 2,
93 dlg.dialog.atr, dlg.border.atr);
94
95 print_buttons(dialog, height, width, 0);
96
97 /* Set up the initial value */
98 wmove(dialog, box_y, box_x);
99 wattrset(dialog, dlg.inputbox.atr);
100
101 len = strlen(instr);
102 pos = len;
103
104 if (len >= box_width) {
105 show_x = len - box_width + 1;
106 input_x = box_width - 1;
107 for (i = 0; i < box_width - 1; i++)
108 waddch(dialog, instr[show_x + i]);
109 } else {
110 show_x = 0;
111 input_x = len;
112 waddstr(dialog, instr);
113 }
114
115 wmove(dialog, box_y, box_x + input_x);
116
117 wrefresh(dialog);
118
119 while (key != KEY_ESC) {
120 key = wgetch(dialog);
121
122 if (button == -1) { /* Input box selected */
123 switch (key) {
124 case TAB:
125 case KEY_UP:
126 case KEY_DOWN:
127 break;
128 case KEY_BACKSPACE:
129 case 127:
130 if (pos) {
131 wattrset(dialog, dlg.inputbox.atr);
132 if (input_x == 0) {
133 show_x--;
134 } else
135 input_x--;
136
137 if (pos < len) {
138 for (i = pos - 1; i < len; i++) {
139 instr[i] = instr[i+1];
140 }
141 }
142
143 pos--;
144 len--;
145 instr[len] = '\0';
146 wmove(dialog, box_y, box_x);
147 for (i = 0; i < box_width; i++) {
148 if (!instr[show_x + i]) {
149 waddch(dialog, ' ');
150 break;
151 }
152 waddch(dialog, instr[show_x + i]);
153 }
154 wmove(dialog, box_y, input_x + box_x);
155 wrefresh(dialog);
156 }
157 continue;
158 case KEY_LEFT:
159 if (pos > 0) {
160 if (input_x > 0) {
161 wmove(dialog, box_y, --input_x + box_x);
162 } else if (input_x == 0) {
163 show_x--;
164 wmove(dialog, box_y, box_x);
165 for (i = 0; i < box_width; i++) {
166 if (!instr[show_x + i]) {
167 waddch(dialog, ' ');
168 break;
169 }
170 waddch(dialog, instr[show_x + i]);
171 }
172 wmove(dialog, box_y, box_x);
173 }
174 pos--;
175 }
176 continue;
177 case KEY_RIGHT:
178 if (pos < len) {
179 if (input_x < box_width - 1) {
180 wmove(dialog, box_y, ++input_x + box_x);
181 } else if (input_x == box_width - 1) {
182 show_x++;
183 wmove(dialog, box_y, box_x);
184 for (i = 0; i < box_width; i++) {
185 if (!instr[show_x + i]) {
186 waddch(dialog, ' ');
187 break;
188 }
189 waddch(dialog, instr[show_x + i]);
190 }
191 wmove(dialog, box_y, input_x + box_x);
192 }
193 pos++;
194 }
195 continue;
196 default:
197 if (key < 0x100 && isprint(key)) {
198 if (len < MAX_LEN) {
199 wattrset(dialog, dlg.inputbox.atr);
200 if (pos < len) {
201 for (i = len; i > pos; i--)
202 instr[i] = instr[i-1];
203 instr[pos] = key;
204 } else {
205 instr[len] = key;
206 }
207 pos++;
208 len++;
209 instr[len] = '\0';
210
211 if (input_x == box_width - 1) {
212 show_x++;
213 } else {
214 input_x++;
215 }
216
217 wmove(dialog, box_y, box_x);
218 for (i = 0; i < box_width; i++) {
219 if (!instr[show_x + i]) {
220 waddch(dialog, ' ');
221 break;
222 }
223 waddch(dialog, instr[show_x + i]);
224 }
225 wmove(dialog, box_y, input_x + box_x);
226 wrefresh(dialog);
227 } else
228 flash(); /* Alarm user about overflow */
229 continue;
230 }
231 }
232 }
233 switch (key) {
234 case 'O':
235 case 'o':
236 delwin(dialog);
237 return 0;
238 case 'H':
239 case 'h':
240 delwin(dialog);
241 return 1;
242 case KEY_UP:
243 case KEY_LEFT:
244 switch (button) {
245 case -1:
246 button = 1; /* Indicates "Help" button is selected */
247 print_buttons(dialog, height, width, 1);
248 break;
249 case 0:
250 button = -1; /* Indicates input box is selected */
251 print_buttons(dialog, height, width, 0);
252 wmove(dialog, box_y, box_x + input_x);
253 wrefresh(dialog);
254 break;
255 case 1:
256 button = 0; /* Indicates "OK" button is selected */
257 print_buttons(dialog, height, width, 0);
258 break;
259 }
260 break;
261 case TAB:
262 case KEY_DOWN:
263 case KEY_RIGHT:
264 switch (button) {
265 case -1:
266 button = 0; /* Indicates "OK" button is selected */
267 print_buttons(dialog, height, width, 0);
268 break;
269 case 0:
270 button = 1; /* Indicates "Help" button is selected */
271 print_buttons(dialog, height, width, 1);
272 break;
273 case 1:
274 button = -1; /* Indicates input box is selected */
275 print_buttons(dialog, height, width, 0);
276 wmove(dialog, box_y, box_x + input_x);
277 wrefresh(dialog);
278 break;
279 }
280 break;
281 case ' ':
282 case '\n':
283 delwin(dialog);
284 return (button == -1 ? 0 : button);
285 case 'X':
286 case 'x':
287 key = KEY_ESC;
288 break;
289 case KEY_ESC:
290 key = on_key_esc(dialog);
291 break;
292 case KEY_RESIZE:
293 delwin(dialog);
294 on_key_resize();
295 goto do_resize;
296 }
297 }
298
299 delwin(dialog);
300 return KEY_ESC; /* ESC pressed */
301 }
302