1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | /* |
3 | * inputbox.c -- implements the input box |
4 | * |
5 | * ORIGINAL AUTHOR: Savio Lam (lam836@cs.cuhk.hk) |
6 | * MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap@cfw.com) |
7 | */ |
8 | |
9 | #include "dialog.h" |
10 | |
11 | char dialog_input_result[MAX_LEN + 1]; |
12 | |
13 | /* |
14 | * Print the termination buttons |
15 | */ |
16 | static void print_buttons(WINDOW * dialog, int height, int width, int selected) |
17 | { |
18 | int x = width / 2 - 11; |
19 | int y = height - 2; |
20 | |
21 | print_button(win: dialog, label: " Ok " , y, x, selected: selected == 0); |
22 | print_button(win: dialog, label: " Help " , y, x: x + 14, selected: selected == 1); |
23 | |
24 | wmove(dialog, y, x + 1 + 14 * selected); |
25 | wrefresh(dialog); |
26 | } |
27 | |
28 | /* |
29 | * Display a dialog box for inputing a string |
30 | */ |
31 | int dialog_inputbox(const char *title, const char *prompt, int height, int width, |
32 | const char *init) |
33 | { |
34 | int i, x, y, box_y, box_x, box_width; |
35 | int input_x = 0, key = 0, button = -1; |
36 | int show_x, len, pos; |
37 | char *instr = dialog_input_result; |
38 | WINDOW *dialog; |
39 | |
40 | if (!init) |
41 | instr[0] = '\0'; |
42 | else |
43 | strcpy(dest: instr, src: init); |
44 | |
45 | do_resize: |
46 | if (getmaxy(stdscr) <= (height - INPUTBOX_HEIGHT_MIN)) |
47 | return -ERRDISPLAYTOOSMALL; |
48 | if (getmaxx(stdscr) <= (width - INPUTBOX_WIDTH_MIN)) |
49 | return -ERRDISPLAYTOOSMALL; |
50 | |
51 | /* center dialog box on screen */ |
52 | x = (getmaxx(stdscr) - width) / 2; |
53 | y = (getmaxy(stdscr) - height) / 2; |
54 | |
55 | draw_shadow(win: stdscr, y, x, height, width); |
56 | |
57 | dialog = newwin(height, width, y, x); |
58 | keypad(dialog, TRUE); |
59 | |
60 | draw_box(win: dialog, y: 0, x: 0, height, width, |
61 | box: dlg.dialog.atr, border: dlg.border.atr); |
62 | wattrset(dialog, dlg.border.atr); |
63 | mvwaddch(dialog, height - 3, 0, ACS_LTEE); |
64 | for (i = 0; i < width - 2; i++) |
65 | waddch(dialog, ACS_HLINE); |
66 | wattrset(dialog, dlg.dialog.atr); |
67 | waddch(dialog, ACS_RTEE); |
68 | |
69 | print_title(dialog, title, width); |
70 | |
71 | wattrset(dialog, dlg.dialog.atr); |
72 | print_autowrap(win: dialog, prompt, width: width - 2, y: 1, x: 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(win: dialog, y: y + 1, x: box_x - 1, height: 3, width: box_width + 2, |
80 | box: dlg.dialog.atr, border: dlg.border.atr); |
81 | |
82 | print_buttons(dialog, height, width, selected: 0); |
83 | |
84 | /* Set up the initial value */ |
85 | wmove(dialog, box_y, box_x); |
86 | wattrset(dialog, dlg.inputbox.atr); |
87 | |
88 | len = strlen(s: instr); |
89 | pos = len; |
90 | |
91 | if (len >= box_width) { |
92 | show_x = len - box_width + 1; |
93 | input_x = box_width - 1; |
94 | for (i = 0; i < box_width - 1; i++) |
95 | waddch(dialog, instr[show_x + i]); |
96 | } else { |
97 | show_x = 0; |
98 | input_x = len; |
99 | waddstr(dialog, instr); |
100 | } |
101 | |
102 | wmove(dialog, box_y, box_x + input_x); |
103 | |
104 | wrefresh(dialog); |
105 | |
106 | while (key != KEY_ESC) { |
107 | key = wgetch(dialog); |
108 | |
109 | if (button == -1) { /* Input box selected */ |
110 | switch (key) { |
111 | case TAB: |
112 | case KEY_UP: |
113 | case KEY_DOWN: |
114 | break; |
115 | case KEY_BACKSPACE: |
116 | case 8: /* ^H */ |
117 | case 127: /* ^? */ |
118 | if (pos) { |
119 | wattrset(dialog, dlg.inputbox.atr); |
120 | if (input_x == 0) { |
121 | show_x--; |
122 | } else |
123 | input_x--; |
124 | |
125 | if (pos < len) { |
126 | for (i = pos - 1; i < len; i++) { |
127 | instr[i] = instr[i+1]; |
128 | } |
129 | } |
130 | |
131 | pos--; |
132 | len--; |
133 | instr[len] = '\0'; |
134 | wmove(dialog, box_y, box_x); |
135 | for (i = 0; i < box_width; i++) { |
136 | if (!instr[show_x + i]) { |
137 | waddch(dialog, ' '); |
138 | break; |
139 | } |
140 | waddch(dialog, instr[show_x + i]); |
141 | } |
142 | wmove(dialog, box_y, input_x + box_x); |
143 | wrefresh(dialog); |
144 | } |
145 | continue; |
146 | case KEY_LEFT: |
147 | if (pos > 0) { |
148 | if (input_x > 0) { |
149 | wmove(dialog, box_y, --input_x + box_x); |
150 | } else if (input_x == 0) { |
151 | show_x--; |
152 | wmove(dialog, box_y, box_x); |
153 | for (i = 0; i < box_width; i++) { |
154 | if (!instr[show_x + i]) { |
155 | waddch(dialog, ' '); |
156 | break; |
157 | } |
158 | waddch(dialog, instr[show_x + i]); |
159 | } |
160 | wmove(dialog, box_y, box_x); |
161 | } |
162 | pos--; |
163 | } |
164 | continue; |
165 | case KEY_RIGHT: |
166 | if (pos < len) { |
167 | if (input_x < box_width - 1) { |
168 | wmove(dialog, box_y, ++input_x + box_x); |
169 | } else if (input_x == box_width - 1) { |
170 | show_x++; |
171 | wmove(dialog, box_y, box_x); |
172 | for (i = 0; i < box_width; i++) { |
173 | if (!instr[show_x + i]) { |
174 | waddch(dialog, ' '); |
175 | break; |
176 | } |
177 | waddch(dialog, instr[show_x + i]); |
178 | } |
179 | wmove(dialog, box_y, input_x + box_x); |
180 | } |
181 | pos++; |
182 | } |
183 | continue; |
184 | default: |
185 | if (key < 0x100 && isprint(key)) { |
186 | if (len < MAX_LEN) { |
187 | wattrset(dialog, dlg.inputbox.atr); |
188 | if (pos < len) { |
189 | for (i = len; i > pos; i--) |
190 | instr[i] = instr[i-1]; |
191 | instr[pos] = key; |
192 | } else { |
193 | instr[len] = key; |
194 | } |
195 | pos++; |
196 | len++; |
197 | instr[len] = '\0'; |
198 | |
199 | if (input_x == box_width - 1) { |
200 | show_x++; |
201 | } else { |
202 | input_x++; |
203 | } |
204 | |
205 | wmove(dialog, box_y, box_x); |
206 | for (i = 0; i < box_width; i++) { |
207 | if (!instr[show_x + i]) { |
208 | waddch(dialog, ' '); |
209 | break; |
210 | } |
211 | waddch(dialog, instr[show_x + i]); |
212 | } |
213 | wmove(dialog, box_y, input_x + box_x); |
214 | wrefresh(dialog); |
215 | } else |
216 | flash(); /* Alarm user about overflow */ |
217 | continue; |
218 | } |
219 | } |
220 | } |
221 | switch (key) { |
222 | case 'O': |
223 | case 'o': |
224 | delwin(dialog); |
225 | return 0; |
226 | case 'H': |
227 | case 'h': |
228 | delwin(dialog); |
229 | return 1; |
230 | case KEY_UP: |
231 | case KEY_LEFT: |
232 | switch (button) { |
233 | case -1: |
234 | button = 1; /* Indicates "Help" button is selected */ |
235 | print_buttons(dialog, height, width, selected: 1); |
236 | break; |
237 | case 0: |
238 | button = -1; /* Indicates input box is selected */ |
239 | print_buttons(dialog, height, width, selected: 0); |
240 | wmove(dialog, box_y, box_x + input_x); |
241 | wrefresh(dialog); |
242 | break; |
243 | case 1: |
244 | button = 0; /* Indicates "OK" button is selected */ |
245 | print_buttons(dialog, height, width, selected: 0); |
246 | break; |
247 | } |
248 | break; |
249 | case TAB: |
250 | case KEY_DOWN: |
251 | case KEY_RIGHT: |
252 | switch (button) { |
253 | case -1: |
254 | button = 0; /* Indicates "OK" button is selected */ |
255 | print_buttons(dialog, height, width, selected: 0); |
256 | break; |
257 | case 0: |
258 | button = 1; /* Indicates "Help" button is selected */ |
259 | print_buttons(dialog, height, width, selected: 1); |
260 | break; |
261 | case 1: |
262 | button = -1; /* Indicates input box is selected */ |
263 | print_buttons(dialog, height, width, selected: 0); |
264 | wmove(dialog, box_y, box_x + input_x); |
265 | wrefresh(dialog); |
266 | break; |
267 | } |
268 | break; |
269 | case ' ': |
270 | case '\n': |
271 | delwin(dialog); |
272 | return (button == -1 ? 0 : button); |
273 | case 'X': |
274 | case 'x': |
275 | key = KEY_ESC; |
276 | break; |
277 | case KEY_ESC: |
278 | key = on_key_esc(win: dialog); |
279 | break; |
280 | case KEY_RESIZE: |
281 | delwin(dialog); |
282 | on_key_resize(); |
283 | goto do_resize; |
284 | } |
285 | } |
286 | |
287 | delwin(dialog); |
288 | return KEY_ESC; /* ESC pressed */ |
289 | } |
290 | |