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 11char dialog_input_result[MAX_LEN + 1]; 12 13/* 14 * Print the termination buttons 15 */ 16static 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(dialog, " Ok ", y, x, selected == 0); 22 print_button(dialog, " Help ", y, x + 14, 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 */ 31int 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(instr, init); 44 45do_resize: 46 if (getmaxy(stdscr) <= (height - INPUTBOX_HEIGTH_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(stdscr, y, x, height, width); 56 57 dialog = newwin(height, width, y, x); 58 keypad(dialog, TRUE); 59 60 draw_box(dialog, 0, 0, height, width, 61 dlg.dialog.atr, 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(dialog, prompt, width - 2, 1, 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(dialog, y + 1, box_x - 1, 3, box_width + 2, 80 dlg.dialog.atr, dlg.border.atr); 81 82 print_buttons(dialog, height, width, 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(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 127: 117 if (pos) { 118 wattrset(dialog, dlg.inputbox.atr); 119 if (input_x == 0) { 120 show_x--; 121 } else 122 input_x--; 123 124 if (pos < len) { 125 for (i = pos - 1; i < len; i++) { 126 instr[i] = instr[i+1]; 127 } 128 } 129 130 pos--; 131 len--; 132 instr[len] = '\0'; 133 wmove(dialog, box_y, box_x); 134 for (i = 0; i < box_width; i++) { 135 if (!instr[show_x + i]) { 136 waddch(dialog, ' '); 137 break; 138 } 139 waddch(dialog, instr[show_x + i]); 140 } 141 wmove(dialog, box_y, input_x + box_x); 142 wrefresh(dialog); 143 } 144 continue; 145 case KEY_LEFT: 146 if (pos > 0) { 147 if (input_x > 0) { 148 wmove(dialog, box_y, --input_x + box_x); 149 } else if (input_x == 0) { 150 show_x--; 151 wmove(dialog, box_y, box_x); 152 for (i = 0; i < box_width; i++) { 153 if (!instr[show_x + i]) { 154 waddch(dialog, ' '); 155 break; 156 } 157 waddch(dialog, instr[show_x + i]); 158 } 159 wmove(dialog, box_y, box_x); 160 } 161 pos--; 162 } 163 continue; 164 case KEY_RIGHT: 165 if (pos < len) { 166 if (input_x < box_width - 1) { 167 wmove(dialog, box_y, ++input_x + box_x); 168 } else if (input_x == box_width - 1) { 169 show_x++; 170 wmove(dialog, box_y, box_x); 171 for (i = 0; i < box_width; i++) { 172 if (!instr[show_x + i]) { 173 waddch(dialog, ' '); 174 break; 175 } 176 waddch(dialog, instr[show_x + i]); 177 } 178 wmove(dialog, box_y, input_x + box_x); 179 } 180 pos++; 181 } 182 continue; 183 default: 184 if (key < 0x100 && isprint(key)) { 185 if (len < MAX_LEN) { 186 wattrset(dialog, dlg.inputbox.atr); 187 if (pos < len) { 188 for (i = len; i > pos; i--) 189 instr[i] = instr[i-1]; 190 instr[pos] = key; 191 } else { 192 instr[len] = key; 193 } 194 pos++; 195 len++; 196 instr[len] = '\0'; 197 198 if (input_x == box_width - 1) { 199 show_x++; 200 } else { 201 input_x++; 202 } 203 204 wmove(dialog, box_y, box_x); 205 for (i = 0; i < box_width; i++) { 206 if (!instr[show_x + i]) { 207 waddch(dialog, ' '); 208 break; 209 } 210 waddch(dialog, instr[show_x + i]); 211 } 212 wmove(dialog, box_y, input_x + box_x); 213 wrefresh(dialog); 214 } else 215 flash(); /* Alarm user about overflow */ 216 continue; 217 } 218 } 219 } 220 switch (key) { 221 case 'O': 222 case 'o': 223 delwin(dialog); 224 return 0; 225 case 'H': 226 case 'h': 227 delwin(dialog); 228 return 1; 229 case KEY_UP: 230 case KEY_LEFT: 231 switch (button) { 232 case -1: 233 button = 1; /* Indicates "Help" button is selected */ 234 print_buttons(dialog, height, width, 1); 235 break; 236 case 0: 237 button = -1; /* Indicates input box is selected */ 238 print_buttons(dialog, height, width, 0); 239 wmove(dialog, box_y, box_x + input_x); 240 wrefresh(dialog); 241 break; 242 case 1: 243 button = 0; /* Indicates "OK" button is selected */ 244 print_buttons(dialog, height, width, 0); 245 break; 246 } 247 break; 248 case TAB: 249 case KEY_DOWN: 250 case KEY_RIGHT: 251 switch (button) { 252 case -1: 253 button = 0; /* Indicates "OK" button is selected */ 254 print_buttons(dialog, height, width, 0); 255 break; 256 case 0: 257 button = 1; /* Indicates "Help" button is selected */ 258 print_buttons(dialog, height, width, 1); 259 break; 260 case 1: 261 button = -1; /* Indicates input box is selected */ 262 print_buttons(dialog, height, width, 0); 263 wmove(dialog, box_y, box_x + input_x); 264 wrefresh(dialog); 265 break; 266 } 267 break; 268 case ' ': 269 case '\n': 270 delwin(dialog); 271 return (button == -1 ? 0 : button); 272 case 'X': 273 case 'x': 274 key = KEY_ESC; 275 break; 276 case KEY_ESC: 277 key = on_key_esc(dialog); 278 break; 279 case KEY_RESIZE: 280 delwin(dialog); 281 on_key_resize(); 282 goto do_resize; 283 } 284 } 285 286 delwin(dialog); 287 return KEY_ESC; /* ESC pressed */ 288} 289