busybox/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, "  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 */
  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, scroll = 0, key = 0, button = -1;
  49        char *instr = dialog_input_result;
  50        WINDOW *dialog;
  51
  52        /* center dialog box on screen */
  53        x = (COLS - width) / 2;
  54        y = (LINES - height) / 2;
  55
  56        draw_shadow(stdscr, y, x, height, width);
  57
  58        dialog = newwin(height, width, y, x);
  59        keypad(dialog, TRUE);
  60
  61        draw_box(dialog, 0, 0, height, width, dialog_attr, border_attr);
  62        wattrset(dialog, border_attr);
  63        mvwaddch(dialog, height - 3, 0, ACS_LTEE);
  64        for (i = 0; i < width - 2; i++)
  65                waddch(dialog, ACS_HLINE);
  66        wattrset(dialog, dialog_attr);
  67        waddch(dialog, ACS_RTEE);
  68
  69        print_title(dialog, title, width);
  70
  71        wattrset(dialog, dialog_attr);
  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, border_attr, dialog_attr);
  80
  81        print_buttons(dialog, height, width, 0);
  82
  83        /* Set up the initial value */
  84        wmove(dialog, box_y, box_x);
  85        wattrset(dialog, inputbox_attr);
  86
  87        if (!init)
  88                instr[0] = '\0';
  89        else
  90                strcpy(instr, init);
  91
  92        input_x = strlen(instr);
  93
  94        if (input_x >= box_width) {
  95                scroll = input_x - box_width + 1;
  96                input_x = box_width - 1;
  97                for (i = 0; i < box_width - 1; i++)
  98                        waddch(dialog, instr[scroll + i]);
  99        } else {
 100                waddstr(dialog, instr);
 101        }
 102
 103        wmove(dialog, box_y, box_x + input_x);
 104
 105        wrefresh(dialog);
 106
 107        while (key != ESC) {
 108                key = wgetch(dialog);
 109
 110                if (button == -1) {     /* Input box selected */
 111                        switch (key) {
 112                        case TAB:
 113                        case KEY_UP:
 114                        case KEY_DOWN:
 115                                break;
 116                        case KEY_LEFT:
 117                                continue;
 118                        case KEY_RIGHT:
 119                                continue;
 120                        case KEY_BACKSPACE:
 121                        case 127:
 122                                if (input_x || scroll) {
 123                                        wattrset(dialog, inputbox_attr);
 124                                        if (!input_x) {
 125                                                scroll = scroll < box_width - 1 ? 0 : scroll - (box_width - 1);
 126                                                wmove(dialog, box_y, box_x);
 127                                                for (i = 0; i < box_width; i++)
 128                                                        waddch(dialog,
 129                                                               instr[scroll + input_x + i] ?
 130                                                               instr[scroll + input_x + i] : ' ');
 131                                                input_x = strlen(instr) - scroll;
 132                                        } else
 133                                                input_x--;
 134                                        instr[scroll + input_x] = '\0';
 135                                        mvwaddch(dialog, box_y, input_x + box_x, ' ');
 136                                        wmove(dialog, box_y, input_x + box_x);
 137                                        wrefresh(dialog);
 138                                }
 139                                continue;
 140                        default:
 141                                if (key < 0x100 && isprint(key)) {
 142                                        if (scroll + input_x < MAX_LEN) {
 143                                                wattrset(dialog, inputbox_attr);
 144                                                instr[scroll + input_x] = key;
 145                                                instr[scroll + input_x + 1] = '\0';
 146                                                if (input_x == box_width - 1) {
 147                                                        scroll++;
 148                                                        wmove(dialog, box_y, box_x);
 149                                                        for (i = 0; i < box_width - 1; i++)
 150                                                                waddch(dialog, instr [scroll + i]);
 151                                                } else {
 152                                                        wmove(dialog, box_y, input_x++ + box_x);
 153                                                        waddch(dialog, key);
 154                                                }
 155                                                wrefresh(dialog);
 156                                        } else
 157                                                flash();        /* Alarm user about overflow */
 158                                        continue;
 159                                }
 160                        }
 161                }
 162                switch (key) {
 163                case 'O':
 164                case 'o':
 165                        delwin(dialog);
 166                        return 0;
 167                case 'H':
 168                case 'h':
 169                        delwin(dialog);
 170                        return 1;
 171                case KEY_UP:
 172                case KEY_LEFT:
 173                        switch (button) {
 174                        case -1:
 175                                button = 1;     /* Indicates "Cancel" button is selected */
 176                                print_buttons(dialog, height, width, 1);
 177                                break;
 178                        case 0:
 179                                button = -1;    /* Indicates input box is selected */
 180                                print_buttons(dialog, height, width, 0);
 181                                wmove(dialog, box_y, box_x + input_x);
 182                                wrefresh(dialog);
 183                                break;
 184                        case 1:
 185                                button = 0;     /* Indicates "OK" button is selected */
 186                                print_buttons(dialog, height, width, 0);
 187                                break;
 188                        }
 189                        break;
 190                case TAB:
 191                case KEY_DOWN:
 192                case KEY_RIGHT:
 193                        switch (button) {
 194                        case -1:
 195                                button = 0;     /* Indicates "OK" button is selected */
 196                                print_buttons(dialog, height, width, 0);
 197                                break;
 198                        case 0:
 199                                button = 1;     /* Indicates "Cancel" button is selected */
 200                                print_buttons(dialog, height, width, 1);
 201                                break;
 202                        case 1:
 203                                button = -1;    /* Indicates input box is selected */
 204                                print_buttons(dialog, height, width, 0);
 205                                wmove(dialog, box_y, box_x + input_x);
 206                                wrefresh(dialog);
 207                                break;
 208                        }
 209                        break;
 210                case ' ':
 211                case '\n':
 212                        delwin(dialog);
 213                        return (button == -1 ? 0 : button);
 214                case 'X':
 215                case 'x':
 216                        key = ESC;
 217                case ESC:
 218                        break;
 219                }
 220        }
 221
 222        delwin(dialog);
 223        return -1;              /* ESC pressed */
 224}
 225