linux/scripts/kconfig/lxdialog/inputbox.c
<<
>>
Prefs
   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
  24char dialog_input_result[MAX_LEN + 1];
  25
  26/*
  27 *  Print the termination buttons
  28 */
  29static 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 */
  44int 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
  58do_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