1 /* 2 * inputbox.c -- implements the input box 3 * 4 * ORIGINAL AUTHOR: Savio Lam (lam836 (at) cs.cuhk.hk) 5 * MODIFIED FOR LINUX KERNEL CONFIG BY: William Roadcap (roadcap (at) 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, " 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 */ 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
